HIGH CHAIR

Abstract

 The present application relates to a high chair, including: a seat frame including a first support frame and a first seat plate disposed on the first support frame; a first backrest assembly configured to be detachably connected to the seat frame, and including a first backrest part, a barrier part, and a first connecting part connected to the seat frame; and a second backrest assembly configured to be detachably connected to the seat frame, and including a second backrest part and a second connecting part connected to the seat frame. The seat frame may be connected to one of the first backrest assembly and the second backrest assembly. When the first backrest assembly is fixedly connected to the seat frame, the high chair is in a first usage mode. When the second backrest assembly is fixedly connected to the seat frame, the high chair is in a second usage mode.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of seats, and in particular to a high chair.

BACKGROUND

[0002] Child dining chairs have become more and more popular among parents in recent years. The child dining chairs can facilitate children to eat and help them to cultivate good eating habits. However, functions of the child dining chairs currently on the market are relatively simple, and most of the child dining chairs are only suitable for younger children. Therefore, the child dining chairs have a short service life and low product utilization.

SUMMARY

[0003] According to various embodiments of the present application, a high chair is provided.

[0004] In a first aspect of the present application, a high chair is provided. The high chair includes: a seat frame including a first support frame and a first seat plate disposed on the first support frame; a first backrest assembly configured to be detachably connected to the seat frame, the first backrest assembly including a first backrest part, a barrier part, and a first connecting part that is configured to be connected to the seat frame; and a second backrest assembly configured to be detachably connected to the seat frame, the second backrest assembly including a second backrest part and a second connecting part that is configured to be connected to the seat frame. The seat frame is connectable to one of the first backrest assembly and the second backrest assembly. When the first backrest assembly is fixedly connected to the seat frame, the high chair is in a first usage mode. When the second backrest assembly is fixedly connected to the seat frame, the high chair is in a second usage mode. When neither the first backrest assembly nor the second backrest assembly is connected to the first seat plate, the high chair is in a third usage mode.

[0005] The above high chair can be in the first usage mode by being combined with the first backrest assembly including the first backrest part and the barrier part, and thus serve as a dining chair for a baby of a lower age (for example, a baby aged 6 months to 3 years old). The above high chair can also be in the second usage mode by being connected to the second backrest assembly including the second backrest part, and thus serve as a junior chair for a child of a lower age (for example, a child aged 3 to 12 years old). The above high chair may not be connected to the first backrest part and the second backrest part, and thus serve as an adult chair for an older child and adult (over 12 years old). In this way, the high chair can well meet the eating needs of children or adults of different ages by switching between a plurality of usage modes, and the usage scenarios are wider.

[0006] In an embodiment, the barrier part includes a transverse barrier extending in a transverse direction of the first backrest assembly and lateral barriers extending in a longitudinal direction of the first backrest assembly. The first connecting part is disposed on at least one of the transverse barrier, the lateral barriers, and the first backrest part.

[0007] In an embodiment, the first connecting part includes a first vertical extension and a first longitudinal extension that are connected to each other and arranged at an angle to each other. The seat frame is provided with a first coupling groove corresponding to the first longitudinal extension. The first longitudinal extension is configured to be inserted into the first coupling groove.

[0008] In an embodiment, an elastic finger is disposed on the first longitudinal extension. A first hole corresponding to the elastic finger is disposed on a wall of the first coupling groove. When the first longitudinal extension is inserted into the first coupling groove, an elastic protrusion of the elastic finger is slidable into the first hole.

[0009] In an embodiment, a connection portion between the first longitudinal extension and the first vertical extension is bent to form an engaging recess. When the first longitudinal extension is inserted into the first coupling groove, the engaging recess is engaged with an edge of the seat frame.

[0010] In an embodiment, the second connecting part includes a second vertical extension and a second longitudinal extension that are connected to each other and arranged at an angle to each other. An end of the second vertical extension away from the second longitudinal extension is fixedly connected to the second backrest part. An end of the second longitudinal extension away from the second vertical extension is insertable into a coupling channel of the seat frame.

[0011] In an embodiment, the high chair further includes a locking mechanism. The locking mechanism includes a locking member movably disposed on the seat frame. The second longitudinal extension is provided with a locking hole. The locking member has a first locked position and a first unlocked position. When the second longitudinal extension is inserted into the coupling channel, if the locking member is in the first locked position, the locking member is insertable into the locking hole, if the locking member is in the first unlocked position, the locking member is separatable from the locking hole.

[0012] In an embodiment, the locking mechanism further includes an unlocking member drivingly connected to the locking member. The unlocking member is operable to drive the locking member to move to the first unlocked position.

[0013] In an embodiment, the locking mechanism further includes a first reset member. The first reset member is adapted to bias the locking member to move toward the first locked position.

[0014] In an embodiment, the first support frame includes a plurality of legs and a footrest disposed between two legs of the plurality of legs. A plurality of adjusting holes are disposed on the two legs respectively. The plurality of adjusting holes on the two legs are arranged facing each other. The footrest includes: a plate body; and two plate connectors connected to two ends of the plate body respectively. The high chair further includes an adjusting member. Two adjusting members extend through the two plate connectors respectively and are inserted into two of the plurality of adjusting holes facing each other respectively to fix the plate body at a certain position between the two legs.

[0015] In an embodiment, the high chair further includes a tray part detachably connected to the barrier part or the first backrest part. The tray part includes: a tray body; and tray connecting parts protruding from two sides of the tray body in a transverse direction. The tray connecting parts are provided with second coupling ends respectively. The barrier part or the first backrest part is provided with second coupling grooves into which the second coupling ends are insertable respectively.

[0016] In a second aspect of the present application, a high chair is provided. The high chair includes: a first support frame; and a first seat plate disposed on the first support frame. The first support frame includes a plurality of legs, and a seat bracket connected to upper ends of the plurality of legs. The first support frame is provided with a backrest connecting part configured to be connected to a first backrest assembly or a second backrest assembly. When the backrest connecting part is connected to the first backrest assembly, the high chair is in a first usage mode. When the backrest connecting part is connected to the second backrest assembly, the high chair is in a second usage mode. When the backrest connecting part is not connected to the first backrest assembly or the second backrest assembly, the high chair is in a third usage mode.

[0017] In an embodiment, the backrest connecting part is an engaging groove disposed on the first support frame. An extending direction of the engaging groove is parallel to a plane where the first seat plate is located.

[0018] In an embodiment, both the first backrest assembly and the second backrest assembly are connectable to the engaging groove. The engaging groove extends in a longitudinal direction of the first seat plate.

[0019] In an embodiment, the engaging groove includes: a first engaging groove configured to be connected to the first backrest assembly; and a second engaging groove configured to be connected to the second backrest assembly. When the first engaging groove is not connected to the first backrest assembly and the second engaging groove is not connected to the second backrest assembly, the high chair is in the third usage mode.

[0020] In an embodiment, the first engaging groove and the second engaging groove extend in a longitudinal direction of the first seat plate. The second engaging groove and the first engaging groove and are spaced apart from each other in a transverse direction of the first seat plate. Or, the first engaging groove extends in the longitudinal direction of the first seat plate, and the second engaging groove extend in the transverse direction of the first seat plate.

[0021] In an embodiment, the high chair further includes a footrest. The footrest is capable of being fixed at different height positions relative to the legs. When the high chair is in the first usage mode, the footrest is fixed at a first height position. When the high chair is in the second usage mode, the footrest is fixed at a second height position. When the high chair is in the third usage mode, the footrest is fixed at the third height position.

[0022] In a third aspect of the present application, a high chair is provided. The high chair includes: a second support frame including a first support bracket and a second support bracket, a first end of the first support bracket being connected to a first end of the second support bracket; a second seat plate disposed between the first support bracket and the second support bracket; a first backrest assembly configured to be detachably and pivotally connected to the second support frame, the first backrest assembly including a seat part and a first backrest part; and a second backrest assembly configured to be detachably connected to the second support frame. The second support frame is connectable to one of the first backrest assembly and the second backrest assembly. When the first backrest assembly is mounted to the second support frame and is in a first pivoted position, the high chair is in a first usage mode. When the first backrest assembly is mounted to the second support frame and is in a second pivoted position, the high chair is in a second usage mode. When the second backrest assembly is mounted to the second support frame, the high chair is in a third usage mode.

[0023] The above high chair can be in the first usage mode by being combined with the first backrest assembly including the seat part and the first backrest part, and causing the first backrest assembly to be in the first pivoted position, and thus serve as a chair for newborns under 6 months old. The above high chair can also be in the second usage mode by being combined with the first backrest assembly including the seat part and the first backrest part, and causing the first backrest assembly to be in the second pivoted position, and thus serve as a dining chair for a baby of a lower age (e.g., aged 6 months to 3 years). The above high chair can also be connected to the second backrest assembly to serve as a junior chair for an older child and an adult (aged 3 to 12 years old). In this way, the high chair can well meet the eating needs of children of different ages by switching between a plurality of usage modes, and the usage scenarios are wider.

[0024] In an embodiment, the high chair further includes a pivotable member rotatably disposed on the second support frame. One of the pivotable member and the first backrest assembly is provided with a mounting recess, and another of the pivotable member and the first backrest assembly is provided with a mounting protrusion. The mounting recess cooperates with the mounting protrusion to rotatably mount the first backrest assembly to the second support frame.

[0025] In an embodiment, the high chair further includes a fixing mechanism disposed at the mounting protrusion. The fixing mechanism includes: a first operating member including a driving slope; and an engaging member movably disposed on the mounting protrusion and having a second locked position and a second unlocked position. The engaging member includes an engaging body and a post protruding from the engaging body. A first engaging groove is disposed in the mounting recess. When the engaging member is in the second locked position, the engaging body is engaged with the first engaging groove, the first operating member is operable to push the engaging member to move to the second unlocked position through the driving slope. When the engaging member is in the second unlocked position, the engaging body is disengaged from the first engaging groove.

[0026] In an embodiment, the fixing mechanism further includes a second reset member. The second reset member is adapted to bias the engaging body to move toward the second locked position.

[0027] In an embodiment, limiting protrusions are disposed on two sides of the mounting protrusion. First limiting grooves are disposed on two sidewalls of the mounting recess respectively. When the mounting protrusion is inserted into the mounting recess, each of the limiting protrusions is correspondingly inserted into respective one of the first limiting grooves.

[0028] In an embodiment, a first mounting base is disposed on the first end of the first supporting bracket, and a second mounting base is disposed on the first end of second supporting bracket. The first mounting base and the second mounting base are fastened to each other form a mounting cavity. The high chair further includes an inclination adjusting mechanism. The inclination adjusting mechanism includes: a limiting member movably disposed in the mounting cavity and having a third locked position and a third unlocked position, a first limiting part being disposed at an edge of the limiting member; a second operating member disposed on the first mounting base and movable in an axial direction of the first mounting base; and a second limiting part fixed to the pivotable member, at least a portion of the second limiting part extending into the mounting cavity. The pivotable member is rotatably disposed on the second mounting base. When the limiting member is in the third locked position, the second limiting part is engaged with the first limiting part, and the second operating member is operable to push the limiting member to move to the second unlocked position. When the limiting member is in the third unlocked position, the second limiting part is disengaged with the first limiting part.

[0029] In an embodiment, the inclination adjusting mechanism further includes a third reset member disposed between the second mounting base and the limiting member. The third reset member is adapted to bias the limiting member to move toward the third locked position.

[0030] In an embodiment, the second mounting base is provided with an arc-shaped second limiting groove. The second limiting part extends into the mounting cavity through the second limiting groove. When the pivotable member rotates relative to the second mounting base, the second limiting part moves along the second limiting groove.

[0031] In an embodiment, the second support frame (500) further includes a first connecting frame and a second connecting frame. A first side of the first connecting frame is pivotally connected to the first support bracket. A first side of the second connecting frame is pivotally connected to the second supporting bracket. A second side of the first connecting frame is connected to a second side of the second connecting frame. The second seat plate is fixedly connected to the first connecting frame. The second supporting frame is switchable between an unfolded state and a folded state. When the second supporting frame is in the unfolded state, the second seat plate is disposed above the first connecting frame and the second connecting frame.

[0032] In an embodiment, the high chair further includes an engaging mechanism. The engaging mechanism includes: a first engaging part operatively disposed on the second seat plate; and a second engaging part disposed on a side of the second connecting frame away from the first connecting frame. The first engaging part is engageable with the second engaging part to lock the second support frame in the unfolded state. The first engaging part is operable to be disengaged from the second engaging part to unlock the second support frame in the unfolded state.

[0033] In a fourth aspect of the present application, a high chair is provided. The high chair includes: a second support frame including a first support bracket and a second support bracket, a first end of the first support bracket being connected to a first end of the second support bracket; a second seat plate disposed between the first support bracket and the second support bracket; and a pivotable member rotatably disposed on the second support frame, and configured to be connected to a first backrest assembly or a second backrest assembly to enable the first backrest assembly (200) or the second backrest assembly (300) to be mounted. When the pivotable member is connected to the first backrest assembly and is in a first pivoted position, the high chair is in a first usage mode. When the pivotable member is connected to the first backrest assembly and is in a second pivoted position, the high chair is in a second usage mode. When the pivotable member is connected to the second backrest assembly, the high chair is in a third usage mode.

[0034] In an embodiment, the high chair further includes a limiting member movably disposed on the second support frame and having a third locked position and a third unlocked position. When the limiting member is in the third locked position, a rotation of the pivotable member relative to the second support frame is limited. When the limiting member is in the third unlocked position, limitation on the rotation of the pivotable member relative to the second support frame is released so that the pivotable member is switchable between the first pivoted position and the second pivoted position.

[0035] In an embodiment, the pivotable member is switchable among the first pivoted position, the second pivoted position, and a third pivoted position. When the high chair is in the third usage mode, the pivotable member is in the third pivoted position.

[0036] In an embodiment, when the high chair is in the first usage mode or the second usage mode, the first support bracket is positioned in front of the second support bracket. When the high chair is in the third usage mode, the second support bracket is positioned in front of the first support bracket.

[0037] In an embodiment, an upper portion of the second support bracket is formed as a curved rod. When the high chair is in the third usage mode, the curved rod is configured as an armrest.

[0038] In an embodiment, the second support bracket is connected to a footrest. When the high chair is in the third usage mode, the footrest is configured to support a user's feet.

BRIEF DESCRIPTION OF THE DRAWINGS

[0039] 

FIG. 1 is a perspective schematic view of a high chair in a first usage mode according to an embodiment of the present application.

FIG. 2 is a perspective schematic view of the high chair shown in FIG. 1 to which a tray part is mounted.

FIG. 3 is a perspective schematic view of a high chair in a second usage mode according to an embodiment of the present application.

FIG. 4 is a perspective schematic view of a high chair in a third usage mode according to an embodiment of the present application.

FIG. 5 is an exploded view of the high chair shown in FIG. 1.

FIG. 6 is a perspective schematic view of the high chair shown in FIG. 5 from another perspective.

FIG. 7 is an enlarged view of portion A in FIG. 6.

FIG. 8 is a perspective schematic view of the high chair shown in FIG. 5 from yet another perspective.

FIG. 9 is an enlarged view of portion B in FIG. 8.

FIG. 10 is an exploded view of the high chair shown in FIG. 3.

FIG. 11 is a perspective schematic view of the high chair shown in FIG. 3 from another perspective.

FIG. 12 is a cross-sectional view of the high chair shown in FIG. 11, in which an enlarged view of a locking mechanism of the high chair is included.

FIG. 13 are exploded views of the high chair shown in FIG. 4.

FIG. 14 is a cross-sectional view of the high chair shown in FIG. 4 taken along a line M-M.

FIG. 15 is an enlarged view of portion C in FIG. 14.

FIG. 16 is an enlarged view of portion D in FIG. 14.

FIG. 17 is an exploded view of the high chair shown in FIG. 2.

FIG. 18 is a perspective schematic view of the high chair shown in FIG. 2 from another perspective, in which an enlarged view of a connecting finger and an engaging recess of the high chair is included.

FIG. 19 is a perspective schematic view of the high chair shown in FIG. 4 from another perspective, in which an enlarged view of a footrest plate and an adjusting member of the high chair is included.

FIG. 20 is a perspective schematic view of the adjusting member of the high chair shown in FIG. 19.

FIG. 21 is a perspective schematic view of a high chair in a first usage mode according to another embodiment of the present application.

FIG. 22 is a perspective schematic view of a high chair in a second usage mode according to an embodiment of the present application.

FIG. 23 is a perspective schematic view of a high chair in a third usage mode according to an embodiment of the present application.

FIG. 24 is a schematic side view of the high chair shown in FIG. 21 with a first backrest assembly removed, and a second support frame in an unfolded state.

FIG. 25 is a schematic side view of the high chair shown in FIG. 21 with the first backrest assembly removed, and the second support frame in a semi-folded state.

FIG. 26 is a schematic side view of the high chair shown in FIG. 21 with the first backrest assembly removed, and the second support frame in a folded state.

FIG. 27 is a perspective schematic view of the high chair shown in FIG. 24 from another perspective.

FIG. 28 is a cross-sectional view of the high chair shown in FIG. 24.

FIG. 29 is a cross-sectional view of the high chair shown in FIG. 25.

FIG. 30 is a perspective schematic view of a second support frame and a second seat plate of the high chair shown in FIG. 21.

FIG. 31 is a perspective schematic view of the first backrest assembly of the high chair shown in FIG. 21.

FIG. 32 is a perspective schematic view of the first backrest assembly shown in FIG. 31 from another perspective.

FIG. 33 is a cross-sectional view of the first backrest assembly shown in FIG. 31 taken along a line N-N, in which an enlarged view of a fixing mechanism is included.

FIG. 34 is a perspective schematic view showing an internal structure of the fixing mechanism of the first backrest assembly shown in FIG. 31, with a mounting protrusion removed.

FIG. 35 is a cross-sectional view of the fixing mechanism shown in FIG. 33 from another perspective_∘

FIG. 36 is a partial enlarged view of the second support frame shown in FIG. 30 with a first mounting base removed.

FIG. 37 is a partial cross-sectional view of an inclination adjusting mechanism of the high chair shown in FIG. 21, with a limiting member in a third locked position.

FIG. 38 is a partial cross-sectional view of the inclination adjusting mechanism of the high chair shown in FIG. 21, with the limiting member in a third unlocked position.

FIG. 39 is an exploded view of the inclination adjusting mechanism of the high chair shown in FIG. 21.

Illustration for reference numerals:

[0040] 

101, Seating space; 102, Mounting cavity;

100. Seat frame; 110. First support frame; 111, Seat bracket; 1111, Support base; 1112, leg connecting part; 1112a. coupling sleeve; 112, leg; 1121, Coupling member; 1122, mating groove; 1123, Adjusting hole; 113, Fastener; 114, Footpad; 1141, mating protrusion; 115, footrest; 1151, Plate body; 1152, plate connector; 1152a, First connecting member; 1152b, Second connecting member; 116, Adjusting member; 1161, Operating knob; 1162, Fastening bolt; 117, mounting bracket; 120, first seat plate; 130, first coupling groove; 131, first hole; 150, coupling channel; 151, through hole; 160. Locking mechanism; 161, Locking member; 1611, Hook part; 162, unlocking member; 1621, Operating protrusion; 1622, First end; 1623, Second end; 1624, connecting protrusion; 163, first reset member; 170, mounting groove; 171, operating opening; 180, reinforcing member;

200. First backrest assembly; 210, first backrest part; 211, backrest body; 212, side plate; 2121, mounting protrusion; 2121a, receiving cavity; 2121b, operating hole; 2121c, outer sidewall; 2121d, engaging hole; 2121e, inner sidewall; 2121f, limiting protrusion; 2122, coupling part; 2123, coupling cavity; 2124, fixing block; 220, barrier part; 221, transverse barrier; 222, lateral barrier; 223, connecting groove; 240, seat part; 250, leg rest; 230, first connecting part; 231, first vertical extension; 232, first longitudinal extension; 2321, second groove; 2322, elastic finger; 2322a, elastic protrusion; 233, engaging recess; 241, second coupling groove;

300, Second backrest assembly; 310, Second backrest part; 320, Second connecting part; 321, Second vertical extension; 322, Second longitudinal extension; 3221, first coupling end; 3222, locking hole;

400. Tray part; 410. Tray body; 420. Tray connecting part; 421, second coupling end; 422, Connecting finger; 4221, engaging protrusion; 423, Stopper;

500. Second support frame; 510. First support bracket; 511, First support rod; 512, First connecting rod; 513, First mounting base; 5131, First mounting groove; 5132, operating groove; 5133, coupling hole; 520, second support bracket; 521, second support rod; 522, second connecting rod; 523, second Mounting base; 5231, second mounting groove; 5231a, mounting shaft; 5231b, guide protrusion; 5232, second limiting groove; 530, first connecting frame; 531, first cross rod; 532, first longitudinal rod; 540, second connecting frame; 541, Second cross rod; 542, Second longitudinal rod; 550, Engaging mechanism; 551, First engaging part; 5511, Engaging body; 5511a, Locking groove; 5512, Operating handle; 552, second engaging part; 560, pivotable part;

600, second seat plate;

700, pivotable member; 710, mounting recess; 711, First groove wall; 712, Second groove wall; 713, Third groove wall; 714, Opening; 715, First engaging groove; 716, First limiting groove;

800. Fixing mechanism; 810. First operating member; 811, Operating part; 812, Driving part; 8121, Fork leg; 8122, Driving slope; 820, engaging member; 821, Engaging body; 8211, engaging end; 8212, reset groove; 822, post; 830, second reset member;

900, inclination adjusting mechanism; 910, limiting member; 910', engagement gear; 911, first limiting part; 911', second engaging groove; 9111, first groove; 9112, second groove; 912, engaging convex teeth; 9121, first convex tooth; 9122, second convex tooth; 9123, third convex tooth; 913, mounting hole; 914, guide groove; 920, Second operating member; 921, Operating body; 922, Operating protrusion; 923, Operating limiting part; 930, Second limiting part; 930', engaging element; 931, Connecting arm; 932, Engaging arm; 940, Third reset member.

DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to illustrate the present application and do not limit the scope of the present application.

[0042] It should be noted that when an element is referred to as being "fixed to" to another element, it can be directly on the other element or an intermediate element may also be present. When an element is said to be "connected to" another element, it can be directly connected to the other element or there may also be an intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which the application belongs. The terminology used herein in the description of the present application is for the purpose of describing specific embodiments only and is not intended to limit the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

[0044] The present application provides a high chair, which has a plurality of usage modes, can well meet the eating needs of children or adults of different ages, and has a wider range of usage scenarios.

[0045] The high chair can be configured in a variety of ways. In an embodiment, as shown in FIGS. 1 to 4, the high chair includes a seat frame 100, a first backrest assembly 200, and a second backrest assembly 300. The seat frame 100 includes a first support frame 110 and a first seat plate 120 disposed on the first support frame 110.

[0046] As shown in FIG. 1, the first backrest assembly 200 includes a first backrest part 210, a barrier part 220, and a first connecting part 230 that is configured to be connected to the seat frame 100. The first backrest part 210 is configured to be detachably connected to the seat frame 100 through the first connecting part 230. When the first backrest assembly 200 is connected to the seat frame 100, the high chair is in a first usage mode, that is, a dining chair mode. This mode is suitable for a baby aged about 6 months to 3 years old to have meals, and the child can be seated in a seating space 101 enclosed by the first backrest part 210 and the barrier part 220 without slipping off the high chair easily.

[0047] As shown in FIG. 2, a tray part 400 can be mounted on the front side of the first backrest assembly 200 in a detachable or non-detachable manner to facilitate the placement of tableware and food for the child.

[0048] As shown in FIG. 3, the second backrest assembly 300 includes a second backrest part 310 and a second connecting part 320 that is configured to be connected to the seat frame 100. The second backrest assembly 300 is configured to be detachably connected to the first seat plate 120 through the second connecting part 320. When the second backrest assembly 300 is fixedly connected to the seat frame 100, the high chair is in a second usage mode, that is, a junior chair mode. This mode is mainly suitable for a child aged approximately 3 to 12 years old. The second backrest 310 is not provided with a barrier part, which makes it easier for the child to get on and off the high chair independently, and also facilitates the high chair to be moved to a dining table so that the child can eat at the same table as adults. Certainly, the high chair in this usage mode is not limited to being used as a dining chair, but can also be used by the child or adult in a situation such as learning or gaming.

[0049] As shown in FIG. 4, when neither the first backrest assembly 200 nor the second backrest assembly 300 is connected to the first seat plate 120, the high chair is in a third usage mode, that is, an adult chair mode. This mode is suitable for a child or an adult aged approximately above 12 years old. Similarly, the high chair in this mode is not limited to being used as a dining chair, but can also be used in various situations such as studying or gaming.

[0050] Specifically, as shown in FIG. 5, the barrier part 220 includes a transverse barrier 221 extending in a transverse direction of the first backrest assembly 200 and two lateral barriers 222 extending in a longitudinal direction of the first backrest assembly. The two lateral barriers 222 are generally in the shape of a rectangular plate, and first sides of the two lateral barriers 222 are connected to left and right sides of the first backrest part 210 respectively. The transverse barrier 221 has a long strip structure. Two ends of the transverse barrier 221 are respectively connected to second sides of the two lateral barriers 222 away from the first backrest part 210. In this way, the transverse barrier 221, the two lateral barriers 222, and the first backrest part 210 together form a seating space 101 for a child to sit.

[0051] Further, the first connecting part 230 is disposed on at least one of the transverse barrier 221, the lateral barriers 222, and the first backrest part 210. In this embodiment, one first connecting part 230 (as shown in FIG. 6) is connected to a substantially middle portion of the transverse barrier 221, and two spaced apart first connecting parts 230 (as shown in FIG. 8) are connected to the first backrest part 210. In other embodiments, the number and position of the first connecting parts 230 can also be adjusted as needed. For example, one or at least two first connecting parts 230 may be connected to the lower side of each lateral barrier 222, or may be connected to only the lower side of the first backrest part 210, and so on, and which is not limited thereto.

[0052] As shown in FIGS. 6 to 9, the first connecting part 230 includes a first vertical extension 231 and a first longitudinal extension 232 that are connected to each other and arranged at an angle to each other. In this embodiment, both the first vertical extension 231 and the first longitudinal extension 232 have a plate-shaped structure. An end of the first vertical extension 231 away from the first longitudinal extension 232 is connected to the transverse barrier 221 or the first backrest part 210. The seat frame 100 is provided with a first coupling groove 130 corresponding to the first longitudinal extension 232, The first longitudinal extension 232 is configured to be inserted into the first coupling groove 130.

[0053] Further, the first longitudinal extension 232 is further provided with a second groove 2321. A sidewall of the second groove 2321 is connected to an elastic finger 2322. A free end of the elastic finger 2322 is provided with an elastic protrusion facing away from the first vertical extension 231. In addition, a first hole 131 is disposed on the sidewall of the first coupling groove 130 away from the first seat plate 120. When the first longitudinal extension 232 is inserted into the first coupling groove 130, the elastic protrusion 2322a of the elastic finger 2322 can slide into the first hole 131. In this way, the connection between the first longitudinal extension 232 and the first seat plate 120 can be stronger, that is, the connection between the first backrest assembly 200 and the seat frame 100 can be stronger.

[0054] Furthermore, a connection portion between the first longitudinal extension 232 and the first vertical extension 231 is bent to form an engaging recess 233. When the first longitudinal extension 232 is inserted into the first coupling groove 130, the engaging recess 233 is engaged with an edge of the first seat plate 120.

[0055] In this embodiment, the first connecting part 230 connected to the transverse barrier 221 can be made of a material with certain elastic deformation ability, such as plastic. When first longitudinal portions 232 of two first connecting parts 230 connected to the first backrest part 210 are inserted into the first coupling grooves 130 from the rear side of the first seat plate 120, and the corresponding engaging recesses 233 are engaged with a rear edge of the first seat plate 120, the first connecting part 230 connected to the transverse barrier 221 can be elastically deformed to a certain extent and cross over the front edge of the first seat plate 120 to be inserted into the first coupling groove 130 on the front side of the first seat plate 120, and the corresponding engaging recess 233 is engaged with the front edge of the first seat plate 120. In other embodiments, the first connecting parts 230 connected to the first backrest part 210 may also be made of a material with certain elastic deformation ability.

[0056] Further, the first connecting part 230 connected to the transverse barrier 221 can also be used to block the crotch of the child to prevent the child from slipping off the high chair.

[0057] Specifically, as shown in FIGS. 7 and 9, the first seat plate 120 can have a plate-like structure made of wood or hard plastic. Amounting bracket 117 made of plastic or steel material may be fixed to a lower surface of the first seat plate 120. The mounting bracket 117 and the first seat plate 120 form the first coupling groove 130 into which the first longitudinal extension 232 (details will be described later) is insertable. In this embodiment, there are three corresponding first coupling grooves 130, two of which are disposed on the rear side of the first seat plate 120, and the other one is disposed on the front side of the first seat plate 120. The three first coupling grooves 130 all extend in the longitudinal direction of the first seat plate 120. In other embodiments, the position and number of first coupling grooves 130 can also be adjusted as needed. For example, the first coupling groove 130 can also extend in the transverse direction of the first seat plate 120, and the position of the first connecting part 230 can be adjusted accordingly.

[0058] As shown in FIGS. 10 to 12, the second connecting part 320 includes a second vertical extension 321 and a second longitudinal extension 322 that are connected to each other and arranged at an angle to each other. In this embodiment, both the second vertical extension 321 and the second longitudinal extension 322 have a rod-shaped structure. A diameter of a portion of the second longitudinal extension 322 away from the second vertical extension 321 is less than diameters of other portions of the second longitudinal extension 322, to form a first coupling end 3221 that can be inserted into a coupling channel 150 of the seat frame 100. An end of the second vertical extension 321 away from the second longitudinal extension 322 is fixedly connected to the second backrest part 310.

[0059] Specifically, the second backrest part 310 has a substantially arc-shaped plate structure. Two second connecting parts 320 are provided and are spaced apart from each other, and two corresponding coupling channels 150 are provided. In this embodiment, the two coupling channels 150 are formed in the mounting bracket 117, and both extend along in a longitudinal direction of the first seat plate 120. Specifically, the above two first coupling grooves 130 disposed on the rear side of the first seat plate 120 are positioned between the two coupling channels 150. In other embodiments, the position and number of the coupling channels 150 can also be adjusted as needed. For example, the two coupling channels 150 can be disposed in the transverse direction of the first seat plate 120, and the positions of the two second connecting parts 320 can be adjusted accordingly. Alternatively, the two first coupling grooves 130 may extend in the longitudinal direction of the first seat plate 120, and the two coupling channels 150 may extend in the transverse direction of the first seat plate 120.

[0060] As shown in FIGS. 11 and 12, the seat frame 100 is further provided with a locking mechanism 160. The locking mechanism 160 is configured to selectively lock the second connecting part 320 and the first seat plate 120 relative to each other. Specifically, the locking mechanism 160 includes a locking member 161, an unlocking member 162, and a first reset member 163. The locking member 161 is movably disposed on the seat frame 100. The second longitudinal extension 322 is provided with a locking hole 3222. The locking member 161 has a first locked position and a first unlocked position. When the second longitudinal extension 322 is inserted into the coupling channel 150, if the locking member 161 is in the first locked position, the locking member 161 can be inserted into the locking hole 3222; if the locking member 161 is in the first unlocked position, the locking member 161 can be separated from the locking hole 3222. The unlocking member 162 is operable to drive the locking member 161 to move to the first unlocked position. The first reset member 163 is adapted to bias the locking member 161 to move toward the first locked position.

[0061] Further, the second longitudinal extensions 322 of the two second connecting parts 320 connected to the second backrest part 310 are each provided with locking holes 3222. Two corresponding locking mechanisms 160 are provided to respectively engage with the two locking holes 3222. In this embodiment, two locking holes 3222 are arranged opposite to each other, and the two locking mechanisms 160 are positioned between the two second longitudinal extensions 322. One of the locking mechanisms 160 is taken as an example for description below.

[0062] As shown in FIGS. 11 and 12, the unlocking member 162 has a substantially rod-shaped structure, and an operating protrusion 1621 is provided substantially in the middle of the unlocking member 162. An elongated mounting groove 170 is formed in the mounting bracket 117 or between the mounting bracket 117 and the first seat plate 120. The mounting groove 170 extends generally in the transverse direction of the first seat plate 120, that is, an extending direction of the mounting groove 170 is substantially perpendicular to an extending direction of the coupling channel 150. The unlocking member 162 is disposed in the mounting groove 170 and can move in the extending direction of the mounting groove 170. An operating opening 171 is disposed on a wall of the mounting groove 170. The operating protrusion 1621 of the unlocking member 162 extends out of the mounting groove 170 through the operating opening 171 to be operated. The unlocking member 162 includes a first end 1622 and a second end 1623. The locking member 161 is pivotally connected to the first end 1622 of the unlocking member 162. The locking member 161 has a hook part 1611 away from the first end 1622. A through hole 151 extends through the sidewall of the coupling channel 150. The mounting groove 170 is in communication with the coupling channel 150 through the through hole 151. When the second longitudinal extension 322 is inserted into the coupling channel 150, the through hole 151 faces the locking hole 3222. At this time, if the locking member 161 is in the first locked position, the locking member 161 is inserted into the locking hole 3222 through the through hole 151. In this embodiment, the first reset member 163 is a spring. In this embodiment, the second end 1623 of the unlocking member 162 is provided with a connecting protrusion 1624. The first reset member 163 is disposed in the mounting groove 170. One end of the first reset member 163 is sleeved on the connecting protrusion 1624 and abuts against the second end 1623 of the unlocking member 162, and another end of the first reset member 163 abuts against the wall of the mounting groove 170.

[0063] The specific working principle of the above-mentioned locking mechanism 160 is as follows.

[0064] Taking the locking mechanism 160 positioned on the right sides in FIGS. 11 and 12 as an example, when the second backrest assembly 300 needs to be detached from the seat frame 100, when the operating protrusion 1621 of the unlocking member 162 is moved in a direction away from the locking hole 3222 (i.e., in a first direction D1 shown in FIG. 11 or 12), the locking member 161 can be driven to move in the first direction D1, and pivot in a second direction D2 shown in FIG. 12 to be separated from the locking hole 3222. In this way, the second longitudinal extension 322 can be removed from the coupling channel 150, and the second backrest assembly 300 is removed. After the second backrest assembly 300 is removed and the external force exerted on the operating protrusion 1621 is removed, the locking member 162 moves in the reversed direction of the first direction D1 under the elastic force of the first reset member 163, and the locking member 161 is switched to the first locked position again, driven by the unlocking member 162.

[0065] When the second backrest assembly 300 needs to be mounted on the seat frame 100, the second longitudinal extension 322 of the second backrest assembly 300 is inserted into the coupling channel 150. The hook part 1611 is provided with an inclined surface. During the inserting process, the second longitudinal extension 322 can drive the hook part 1611 to pivot and move out of the locking hole 3222 through the inclined surface, that is, enable the locking member 161 to be in the first unlocked position. When the second longitudinal extension 322 is inserted in place, the through hole 151 faces the locking hole 3222 of the second longitudinal extension 322, and the second longitudinal extension 322 is not press against the inclined surface, then the unlocking member 162 moves in the reversed direction of the first direction D 1 under the elastic force of the first reset member 163, and the locking member 161 is switched to the first locked position again driven by the unlocking member 162, that is, the locking member 161 is inserted into the locking hole 3222 of the second longitudinal extension 322 through the through hole 151, so that the second backrest assembly 300 is fixed on the seat frame 100.

[0066] Further, the mounting frame 117 is further provided with a tubular reinforcing member 180 to provide more stable support for the first seat plate 120. In this embodiment, two reinforcing members 180 are provided and are spaced apart in the longitudinal direction of the first seat plate 120.

[0067] In an embodiment not shown, it is not necessary to provide both the first coupling groove 130 and the coupling channel 150 at the bottom of the first seat plate 120, that is, only the first coupling groove 130 or the coupling channel 150 can be provided at the bottom of the first seat plate 120. In order to facilitate the distinction herein, the first coupling groove 130 or the coupling channel 150 is recorded as a coupling groove. The coupling groove can be in snap-fit with the first longitudinal extension 232 or the second longitudinal extension 322. In this embodiment, the first longitudinal extension 232 and the second longitudinal extension 322 should also have substantially the same shape, for example, can both be plate-shaped or rod-shaped, so that the first longitudinal extension 232 and the second longitudinal extension 322 can be inserted into the coupling groove. In this way, the step of processing the first coupling groove 130 or the coupling channel 150 can be omitted, thereby simplifying the process and saving costs. In this embodiment, an extending direction of the coupling groove is parallel to the plane where the first seat plate 120 is located, and the coupling groove extends in the longitudinal direction of the first seat plate 120.

[0068] Further, as shown in FIG. 13, the first support frame 110 includes a seat bracket 111 and a plurality of legs 112. The seat bracket 111 includes a support base 1111 and a leg connecting part 1112 that are connected to each other. In this embodiment, two support bases 1111 are provided, and are respectively fixed on two sides of the first seat plate 120 in the transverse direction. Two ends of the support base 1111 are respectively connected to the two leg connecting parts 1112 to form a substantially U-shaped structure. In this embodiment, the support base 1111 and the two leg connecting parts 1112 are integrally formed. Ends of the two leg connecting parts 1112 away from the support base 1111 are detachably connected to legs 112 respectively. A connection structure between one of the leg connecting parts 1112 and the corresponding legs 112 are taken as an example for detailed description below.

[0069] As shown in FIGS. 14 and 15, one of the leg 112 and the leg connecting part 1112 is provided with a coupling member 1121, and another of the leg 112 and the leg connecting part 1112 is provided with a coupling sleeve 1112a. The coupling member 1121 is inserted into the coupling sleeve 1112a, and fixedly connected to the coupling sleeve 1112a through a fastener 113 extending through the coupling member 1121 and the coupling sleeve 1112a. In this embodiment, the leg 112 is provided with the coupling member 1121, the leg connecting part 1112 is provided with the coupling sleeve 1112a, and the fastener 113 can be a bolt. In this way, the legs 112 can be detachably connected to the leg connecting parts 1112.

[0070] As shown in FIG. 16, an end of the leg 112 away from the leg connecting part 1112, that is, the bottom end of the leg 112 is further provided with a foot pad 114. The foot pad 114 is made of rubber or other materials and have a certain anti-slip and noise-reducing effect. The foot pad 114 is provided with a mating protrusion 1141, and the bottom end of the leg 112 is provided with a mating groove 1122. The foot pad 114 is fixed to the bottom end of the leg 112 through an interference fit between the mating protrusion 1141 and the mating groove 1122.

[0071] Further, as shown in FIG. 17, the tray part 400 includes a tray body 410 and tray connecting parts 420 protruding from two sides of the tray body 410 in the transverse direction. The two tray connecting parts 420 are provided with second coupling ends 421 respectively, and the barrier part 220 or the first backrest part 210 is provided with two second coupling grooves 241 into which the second coupling ends 421 can be inserted respectively.

[0072] Further, as shown in FIG. 18, each plate connecting part 420 is further provided with a connecting finger 422 approximately in the middle. A connecting groove 223 is disposed at the upper edge of the barrier part 220 or the first backrest 210. When the second coupling ends 421 of the two tray connecting parts 420 are inserted into the two second coupling grooves 241 respectively, an engaging protrusion 4221 of the connecting finger 422 can be engaged with the connecting groove 223 to securely mount the tray part 400 on the first backrest assembly 200.

[0073] Further, as shown in FIGS. 18 and 19, a footrest 115 is disposed between the two legs 112 on the front side of the first support frame 110 to facilitate child or adult to rest their feet when sitting. A connection position of the footrest 115 relative to the two legs 112 is adjustable, that is, the height position of the footrest 115 is adjustable to adapt to children or adults of different sizes. Specifically, the footrest 115 includes a plate body 1151, and plate connectors 1152 connected to two ends of the plate body 1151 respectively. The plate body 1151 has a rectangular plate-shaped structure. The plate connector 1152 generally has a L-shaped structure, including a first connecting member 1152a and a second connecting member 1152b that are connected to each other. A plurality of adjusting holes 1123 are disposed on each leg 112. The plurality of adjusting holes 1123 on the two legs 112 on the front side of the first support frame 110 are arranged facing each other.

[0074] The structure on a side of the plate body 1151 is taken as an example for illustration. The first connecting member 1152a is fixed to the bottom of a side of the plate body 1151, and the second connecting member 1152b is detachably connected to the leg 112 on the corresponding side. An adjusting member 116 extends through the second connecting member 1152b and is inserted into one of the plurality of adjusting holes 1123 to fix the plate body 1151 at a certain position of the leg 112.

[0075] Specifically, as shown in FIG. 20, the adjusting member 116 generally has a T-shaped structure and includes an operating knob 1161 and a fastening bolt 1162 that are connected to each other and arranged at an angle to each other. A fastening nut (not shown in figures) can be embedded in the adjusting hole 1123. The nut is provided with a first thread (not shown in figures). An end of the fastening bolt 1162 away from the operating knob 1161 is provided with a second thread capable of mating with the first thread. In this way, by turning the operating knob 1161, the fastening bolt 1162 can be tightened and fixed in a certain adjusting hole 1123 or the fastening bolt 1162 can be unscrewed from a certain adjusting hole 1123, so that the second connecting member 1152b and the leg 112 can be connected to each other. As such, the height position of the plate body 1151 relative to the leg 112 can be adjusted.

[0076] In this embodiment, each leg 112 is provided with three adjusting holes 1123, so that the footrest 115 can be fixed at three different height positions relative to the leg 112, namely a first height position, a second height position, and a third height position. The heights of the first height position, the second height position, and the third height position decrease in sequence. When the high chair is in the first usage mode, the footrest 115 is fixed at the first height position. When the high chair is in the second usage mode, the footrest 115 is fixed at the second height position. When the high chair is in the third usage mode, the footrest 115 is fixed at the third height position.

[0077] In other embodiments, more than three or less than three height positions of the footrest 115 may be provided, so that the height position of the footrest 115 can be adjusted accordingly according to the user's body size to meet more usage requirements.

[0078] In other embodiments, the high chair does not necessarily include the first backrest assembly 200 and the second backrest assembly 300. The high chair may only include the first backrest assembly 200 or the second backrest assembly 300, that is, the user may only require the first usage mode and the third usage mode, or only require the second usage mode or the third usage mode. Alternatively, the high chair may only include the seat frame 100, that is, the user may only require the third usage mode. In this way, the high chair can have different configurations according to the needs of the user. The seat frame 100 of the high chair may be provided with a backrest connecting part for the mounting of the first backrest assembly 200 and the second backrest assembly 300. The backrest connecting part can be connected to both the first backrest assembly 200 and the second backrest assembly 300. Alternatively, the backrest connecting part may include a first connecting part (for example, the first coupling groove 130) configured for connection with the first backrest assembly 200 and a second connecting part (for example, the coupling channel 150) configured for connection with the second backrest assembly 300 respectively. For example, the backrest connecting part is an engaging groove disposed on the first support frame.

[0079] In another embodiment, as shown in FIGS. 21 to 23, the high chair may also include a second support frame 500, a second seat plate 600, a first backrest assembly 200, and a second backrest assembly 300. The second support frame 500 can be connected to one of the first backrest assembly 200 and the second backrest assembly 300. The second support frame 500 includes a first support bracket 510 and a second support bracket 520. The first support bracket 510 is pivotally connected to an end of the second support bracket 520. The second seat plate 600 is disposed between the first support bracket 510 and the second support bracket 520.

[0080] As shown in FIGS. 21 and 22, the first backrest assembly 200 may be a child seat, including a first backrest part 210, a seat part 240, and a leg rest 250. The first backrest part 210 includes a backrest body 211, and side plates 212 connected to two sides of the backrest body 211 in the transverse direction respectively. The seat part 240 is connected to the lower side of the first backrest part 210. The seat part 240 and the first backrest part 21 enclose a seating space 101 configured for accommodating a child. The leg rest 250 is connected to the front side of the seat 240 for a child to rest the feet. In this embodiment, the child seat is integrally formed. In other embodiments, the child seat can also be formed by connecting the first backrest part 210, the seat part 240, and the leg rest 250 through welding, welding, etc.

[0081] Further, the first backrest assembly 200 is configured to be detachably and pivotably connected to the second support frame 500. Specifically, the two side plates 212 of the first backrest assembly 200 are detachably and pivotably connected to the pivot joint between the first support bracket 510 and the second support bracket 520. When the first backrest assembly 200 is mounted on the second support frame 500, the first backrest assembly 200 can pivot relative to the second support frame 500 so that different usage modes of the high chair are formed. For example, as shown in FIG. 21, when the first backrest assembly 200 is mounted to the second support frame 500 and is in a first pivoted position, the backrest body 211 is tilted rearward relative to the second support frame 500, and the high chair is in a first usage mode. The first usage mode is a newborn mode, which is suitable for a baby under about 6 months old. The babies in this age group generally do not have the ability to sit up and eat independently due to their immature cervical vertebrae. Therefore, the high chair in the first usage mode can be used as a comfort seat for the baby. In this case, the baby is generally in a reclined position, which can protect the baby's cervical spine. The first backrest part 210 may be provided with a five-point safety belt to fix the baby in the seating space 101.

[0082] As shown in FIG. 22, when the first backrest assembly 200 is mounted to the second support frame 500 and is in a second pivoted position, the backrest body 211 is relatively upright, and the high chair is in a second usage mode. The second usage mode is a dining chair mode, which is suitable for a baby aged about 6 months to 3 years old to eat. In this second usage mode, a tray part 400 can also be mounted in a detachable or non-detachable manner to facilitate the placement of tableware and food for the child. The tray part 400 in this embodiment also includes a tray body 410 and tray connecting parts 420 respectively positioned at two ends of the tray body 410 on the rear side. In this embodiment, coupling parts 2122 are disposed on outer sides of the two side plates 212 respectively. The coupling part 2122 includes a coupling cavity 2123 (see FIG. 22) into which the tray connecting part 420 can be inserted. In this way, the tray part 400 is detachably connected to the first backrest assembly 200. The tray part 400 further includes a stopper 423 positioned below the tray body 410. The stopper 423 can be used to block the crotch of the child to prevent the child from sliding off the high chair.

[0083] As shown in FIG. 23, when the second backrest assembly 300 is mounted to the second support frame 500, the high chair is in a third usage mode. The second backrest assembly 300 generally has a U-shaped rod structure. Two ends of the U-shaped rod are detachably connected to the pivot joints between the first support bracket 510 and the second support bracket 520 for supporting the user's back. The third usage mode is the junior chair mode, which is mainly suitable for a child aged approximately 3 to 12 years old, and certainly, can also be used by a child or an adult older than 12 years old.

[0084] Further, referring to FIG. 30, when the high chair is in the third usage mode, a pivotable member 700 is in the second pivoted position, and two ends of the second backrest assembly 300 are inserted into and fixed to mounting recess 710 of the two pivotable members 700 respectively. In other embodiments, when the high chair is in the third usage mode, the pivotable member 700 may also be in a third pivoted position that is different from the first pivoted position and the second pivoted position.

[0085] It is worthwhile noting that, as shown in FIGS. 21 and 22, when the first backrest assembly 200 is mounted on the second support frame 500, the first support bracket 510 is positioned in front of the second support bracket 520. When the second backrest assembly 300 is mounted on the second support frame 500, the second support bracket 520 is positioned in front of the first support bracket 510. In other embodiments, it can also be configured such that no matter whether the first backrest assembly 200 or the second backrest assembly 300 is mounted on the second support frame 500, the first support bracket 510 is positioned in front of the second support bracket 520.

[0086] Further, as shown in FIGS. 24 to 26, the second support frame 500 can be folded to save storage or transportation space, that is, the second support frame 500 can be switched between an unfolded state and a folded state. Specifically, as shown in FIG. 23, the first support bracket 510 includes two first support rods 511 disposed on two sides of the second seat plate 600 in the transverse direction and a first connecting rod 512 connected between the two first support rods 511. The second support bracket 520 includes two second support rods 521 disposed on the two sides of the second seat plate 600 in the transverse direction and a second connecting rod 522 connected between the two second support rods 521. Each first support rod 511 is pivotally connected to the corresponding second support rod 521 on the same side. In this embodiment, the two first support rods 511 are both straight rods, and the two second support rods 521 are curved rods with a certain curvature at the upper portion. In this way, when the first backrest assembly 200 is mounted on the second support frame 500, the two second support rods 521 does not protrude to be in front of the first backrest assembly 200 and does not interfere with the first backrest assembly 200. When the second backrest assembly 300 is mounted on the second support frame 500, the portions of the two second support rods 521 with a certain curvature may be also formed as an armrest that is easy to grasp, and play a certain protective role. A footrest 115 is further connected between the two second support rods 521. When the high chair is in the third usage mode, the footrest 115 can be used to support the user's feet. In other embodiments, the two first support rods 511 and the two second support rods 521 can also both be straight rods or curved rods.

[0087] As shown in FIG. 27, the second support frame 500 further includes a first connecting frame 530 and a second connecting frame 540 that are configured to support the second seat plate 600 and be below the second seat plate 600. A first side of the first connecting frame 530 is pivotally connected to the first support bracket 510, a first side of the second connecting frame 540 is pivotally connected to the second supporting bracket 520, and a second side of the first connecting frame 530 is connected to a second side of the second connecting frame 540. The second seat plate 600 is fixedly connected to the first connecting frame 530. When the second supporting frame 500 is in the unfolded state, the first connecting frame 530 and the second connecting frame 540 are approximately in the same plane, and the second seat plate 600 is disposed above the first connecting frame 530 and the second connecting frame 540.

[0088] Specifically, both the first connecting frame 530 and the second connecting frame 540 generally have an H-shaped frame structure. The first connecting frame 530 includes a first cross rod 531 extending generally in the transverse direction of the second seat plate 600, and two first longitudinal rods 532 connected to two ends of the first cross rod 531 and extending generally in the longitudinal direction of the second seat plate 600 respectively. The second connecting frame 540 includes a second cross rod 541 extending generally in the transverse direction of the second seat plate 600, and two second longitudinal rods 542 connected to two ends of the second cross rod 541 and extending generally in the longitudinal direction of the second seat plate 600 respectively. First ends of the two first longitudinal rods 532 are pivotally connected to the first connecting rod 512 through two pivotable parts 560 respectively, and second ends of the two first longitudinal rods 532 are pivotally connected to first ends of the two second longitudinal rods 542 through two pivotable parts 560 respectively. Second ends of the two second longitudinal rods 542 is pivotally connected to the second cross rod 541 respectively. The first connecting frame 530 is fixed below the second seat plate 600. Specifically, the first cross rod 531 is fixed below the second seat plate 600, so that when the first connecting frame 530 is pivoted and folded, the second connecting frame 540 can be driven to pivot and fold. The first cross rod 531 is disposed away from the first connecting rod 512 to provide better support for the second seat plate 600. The second cross rod 541 is disposed close to the second connecting rod 522.

[0089] Further, as shown in FIGS. 28 and 29, the second support frame 500 in this embodiment further includes an engaging mechanism 550. The engaging mechanism 550 includes a first engaging part 551 and a second engaging part 552. The first engaging part 551 is operatively disposed on the second seat plate 600. The first engaging part 551 includes an engaging body 5511 and an operating handle 5512 that are connected to each other. In this embodiment, the first engaging part 551 is integrally formed. An end of the engaging body 5511 may be connected to the rear edge of the second seat plate 600 through, for example, screws. The engaging body 5511 includes a locking groove 5511a. The second engaging part 552 is disposed on the second support bracket 520. Specifically, the second engaging part 552 is fixed to a substantially middle portion of the second cross rod 541. The first engaging part 551 can be engaged with the second engaging part 552 to lock the second support frame 500 in the unfolded state, that is, the second connecting rod 522 can be engage in the locking groove 5511a to lock the second supporting frame 500 in the unfolded state. The first engaging part 551 is operable to be disengaged from the second engaging part 552. Specifically, the first engaging part 551 is made of a material with certain elastic deformation ability, such as plastic. When the operating handle 5512 is operated in a direction D3, the second connecting rod 522 can be disengaged from the locking groove 5511a, thereby unlocking the second support frame 500 in the unfolded state. After unlocking the unfolded state, the second support frame 500 can be folded by pivoting the first connecting frame 530 and the second connecting frame 540 and by pivoting the first supporting bracket 510 and the second supporting bracket 520 relative to each other (shown in FIGS. 24 to FIG. 26).

[0090] Further, as shown in FIGS. 30 and 31, the high chair in this embodiment further includes the pivotable member 700. The pivotable member 700 is rotatably disposed on the second support frame 500. One of the pivotable member 700 and the first backrest assembly 200 is provided with a mounting recess 710, and another of the pivotable member 700 and the first backrest assembly 200 is provided with a mounting protrusion 2121. The mounting recess 710 cooperates with the mounting protrusion 2121 to rotatably mount the first backrest assembly 200 to the second support frame 500. Similarly, the pivotable member 700 and the second backrest assembly 300 connected to the pivotable member 700 may have similar configuration to the above for mounting.

[0091] Specifically, a first mounting base 513 is disposed on the upper end of each first support rod 511, and a second mounting base 523 that is pivotally connected to the first mounting base 513 on the corresponding side is disposed on the upper end of each second support rod 521. Two pivotable members 700 are provided, and rotatably disposed on the second mounting base 523 respectively. In this embodiment, the second mounting base 523 is pivotally connected to an inner side of the first mounting base 513, that is, a side of the first mounting base 513 facing the second seat plate 600, and the pivotable member 700 is pivotally connected to an inner side of the second mounting base 523. In this way, the two pivotable members 700 are arranged facing each other. The two pivotable members 700 are provided with mounting recesses 710 respectively. Each of the two side plates 212 of the first backrest assembly 200 is provided with the mounting protrusions 2121 that can cooperate with the respective one of the two mounting recesses 710 to rotatably mount the first backrest assembly 200 to the second support frame 500.

[0092] The mounting recess 710 and the mounting protrusion 2121 on one of the sides are taken as an example to specifically describe the related configurations.

[0093] As shown in FIG. 30, the mounting recess 710 has a groove-shaped structure with a substantially rectangular cross-section. The mounting recess 710 includes a first groove wall 711 and a second groove wall 712 arranged facing each other, and a third groove wall 713 connected to first ends of the first groove wall 711 and the second groove wall 712. An opening 714 is formed at second ends of the first groove wall 711 and the second groove wall 712. A circular first engaging groove 715 is disposed substantially in the middle of the bottom of the groove of the mounting recess 710. As shown in FIG. 31, the mounting protrusion 2121 has a substantially rectangular housing structure that matches the mounting recess 710. A receiving cavity 2121a is formed in the mounting protrusion 2121 (see FIG. 33). The mounting protrusion 2121 can be inserted into the mounting recess 710 through the opening 714.

[0094] Further, as shown in FIGS. 32 to 34, the high chair is further provided with a fixing mechanism 800, which is configured to realize the detachable mounting between the first backrest assembly 200 and the second support frame 500. The fixing mechanism 800 is at least partially disposed in the receiving cavity 2121a of the mounting protrusion 2121. The fixing mechanism 800 specifically includes a first operating member 810, an engaging member 820, and a second reset member 830.

[0095] Specifically, the first operating member 810 is at least partially movably disposed in the receiving cavity 2121a. The first operating member 810 includes an operating part 811 and a driving part 812 that are connected to each other. In this embodiment, the first operating member 810 is integrally formed. An end of the mounting protrusion 2121 is provided with an operating hole 2121b that is in communication with the receiving cavity 2121a. An end of the operating part 811 away from the driving part 812 can extend out of the operating hole 2121b to be pressed. An end of the driving part 812 away from the operating part 811 has a fork-shaped structure and has two fork legs 8121. The two fork legs are provided with driving slopes 8122 respectively.

[0096] Specifically, the engaging member 820 is movably disposed on the mounting protrusion 2121. In this embodiment, the engaging member 820 is at least partially disposed in the receiving cavity 2121a. The engaging member 820 includes an engaging body 821 and posts 822 protruding from two sides of the engaging body 821. An outer sidewall 2121c of the mounting protrusion 2121, that is, a side surface of the mounting protrusion 2121 away from the side plate 212, is provided with an engaging hole 2121d in communication with the receiving cavity 2121a. The engaging member 820 can move between a second locked position and a second unlocked position in a direction closer to or away from the outer sidewall 2121c of the mounting protrusion 2121, that is, in the transverse direction of the first backrest assembly 200. The engaging body 821 includes an engaging end 8211. When the engaging member 820 is in the second locked position, the engaging end 8211 of the engaging body 821 can extend out of the engaging hole 2121d and be engaged in the first engaging groove 715. The two driving slopes 8122 of the driving part 812 abut against the posts 822 on the two sides of the engaging body 821 respectively. Extending directions of the two driving slopes 8122 intersect with and are not perpendicular to a moving direction of the engaging member 820 (i.e., the transverse direction of the first backrest assembly 200). The operating part 811 of the first operating member 810 can be pressed to respectively push the posts 822 on the two sides of the engaging body 821 through the two driving slopes 8122, so that the engaging member 820 moves to the second unlocked position. When the engaging member 820 is in the second unlocked position, the engaging end 8211 of the engaging body 821 retracts into the receiving cavity 2121a to disengage from the first engaging groove 715. At this time, the mounting protrusion 2121 can be moved out of the mounting recess 710 so that the first backrest assembly 200 can be detached from the second support frame 500.

[0097] Specifically, as shown in FIG. 33, the second reset member 830 is adapted to bias the engaging body 821 to move toward the second locked position. In this embodiment, the second return member 830 is a spring disposed in the receiving cavity 2121a. A reset groove 8212 is disposed at an end of the engaging body 821 away from the engaging end 8211. The second reset member 830 is at least partially received in the reset groove 8212 and includes one end abutting against the bottom of the reset groove 8212. Another end of the second reset member 830 abuts against an inner sidewall 2121e of the mounting protrusion 2121 (i.e., the sidewall opposite to the outer sidewall 2121c). The arrangement of the reset groove 8212 helps prevent the second reset member 830 from being displaced during the biasing process.

[0098] Further, as shown in FIG. 35, strip-shaped limiting protrusions 2121f are further disposed on two sides of the mounting protrusion 2121 respectively. First limiting grooves 716 that can cooperate with the limiting protrusions 2121f are further disposed on the first groove wall 711 and the second groove wall 712 of the mounting recess 710 respectively. When the mounting protrusion 2121 is inserted into the mounting recess 710, each of the limiting protrusions 2121f is correspondingly inserted into the respective one of the first limiting grooves 716. The cooperation of the limiting protrusions 2121f and the first limiting grooves 716 can, on the one hand, guide the mounting protrusion 2121 to be inserted into the mounting recess 710, and on the other hand, can also enable the first backrest assembly 200 to be fixed on the second support frame 500 more firmly, which can prevent the first backrest assembly 200 from swaying in the transverse directions.

[0099] Further, as shown in FIGS. 33 and 34, a fixing block 2124 is inserted into a mounting cavity 102 of the mounting protrusion 2121. The fixing block 2124 is used to position the fixing mechanism 800.

[0100] Further, the high chair further includes an inclination adjusting mechanism 900, which is configured to adjust a pivoted position of the first backrest assembly 200 relative to the second support frame 500, and also to adjust a rotation angle of the pivotable member 700 so that the pivotable member 700 is suitable for receiving the second backrest assembly 300. As shown in FIGS. 36 to 38, the inclination adjusting mechanism 900 specifically includes a limiting member 910, a second operating member 920, a second limiting part 930, and a third reset member 940.

[0101] Specifically, the first mounting base 513 includes a substantially cylindrical first mounting groove 5131, and the second mounting base 523 includes a substantially cylindrical second mounting groove 5231. The first mounting base 513 and the second mounting base 523 are fastened to each other form the mounting cavity 102. The limiting member 910 is movably disposed in the mounting cavity 102. The limiting member 910 is movable between a third locked position and a third unlocked position. A first limiting part 911 is disposed at the edge of the limiting member 910. When the limiting member 910 is in the third locked position, the second limiting part 930 is engaged with the first limiting part 911. When the limiting member 910 is in the third unlocked position, the second limiting part 930 is disengaged from the first limiting part 911.

[0102] As shown in FIG. 39, the limiting member 910 can be an engaging gear 910'. The outer edge of the engaging gear 910' is provided with a plurality of engaging convex teeth 912 in a circumferential direction. A second engaging groove 911' is formed between each two engaging convex teeth 912. The second engaging groove 911' forms the first limiting part 911. A mounting shaft 5231a protrudes from the approximate center of the bottom of the second mounting groove 5231. The limiting member 910 includes a mounting hole 913 substantially in the middle. The limiting member 910 can move in an axial direction of the second mounting base 523 by inserting the mounting shaft 5231a into the mounting hole 913. In this embodiment, the plurality of engaging convex teeth 912 include two first convex teeth 9121, two second convex teeth 9122, and two third convex teeth 9123. The two first convex teeth 9121 and the two second convex teeth 9122 have the same size, which is greater than a size of the third convex tooth 9123. The two first convex teeth 9121 and the two second convex teeth 9122 are evenly arranged on the outer edge of the engaging member 820 in the circumferential direction. The two first convex teeth 9121 are symmetrically arranged relative to the mounting hole 913, and the two second convex teeth 9122 are symmetrically arranged relative to the mounting hole 913. One of the two third convex teeth 9123 is disposed between one of the two first convex teeth 9121 and one of the second convex teeth 9122, and another of the two third convex teeth 9123 is disposed between another of the two first convex teeth 9121 and another of the two first convex teeth 9121. That is, the two third convex teeth 9123 are also arranged symmetrically relative to the mounting hole 913. The second engaging groove 911' is formed between each third convex tooth 9123 and its adjacent first convex tooth 9121 or second convex tooth 9122. The second engaging groove 911' includes a first groove 9111 formed between each third convex tooth 9123 and the adjacent first convex tooth 9121, and a second groove 9112 formed between each third convex tooth 9123 and the adjacent second convex tooth 9121. On limiting member 910, two first grooves 9111 are arranged symmetrically relative to the mounting hole 913, and two second grooves 9112 are arranged symmetrically relative to the mounting hole 913. In this embodiment, two second engaging groove 911' are provided, namely the first groove 9111 and the second groove 9112. In other embodiments, the second engaging groove 911' may also include a plurality of grooves, for example, further include a third groove (not shown), to meet requirements of more rotation angles. For example, the third grooves may be disposed on the two first convex teeth 9121 or the two second convex teeth 9122 respectively.

[0103] A guide groove 914 is formed between the first convex tooth 9121 and the second convex tooth 9122 adjacent to the first convex tooth 9121, that is, the limiting member 910 is further provided with two guide grooves 914 symmetrically arranged relative to the mounting hole 913. The bottom of the second mounting groove 5231 is provided with two guide protrusions 5231b extending in a direction parallel to the mounting shaft 5231a. Each guide protrusion 5231b cooperates with the corresponding guide groove 914 so that the limiting member 910 is limited to move in the direction parallel to the mounting shaft 5231a, and cannot rotate relative to the first mounting base 513 and the second mounting base 523.

[0104] Specifically, as shown in FIG. 39, the second operating member 920 is specifically an operating button, including a substantially circular sheet-shaped operating body 921 and a plurality of operating protrusions 922 disposed along the outer edge of the operating body 921 in the circumferential direction. The plurality of operating protrusions 922 are arranged at an angle to the operating body 921. An operating groove 5132 is disposed on a surface of the first mounting base 513 facing away from the mounting cavity 102. A plurality of coupling holes 5133 in communication with the mounting cavity 102 are disposed at the bottom edge of the operating groove 5132. The operating body 921 is movably disposed in the operating groove 5132. The plurality of operating protrusions 922 can respectively extend into the mounting cavity 102 through the plurality of coupling holes 5133 and abut against the limiting member 910. The operating body 921 of the second operating member 920 can be pressed to move in the axial direction of the first mounting base 513 and push the limiting member 910 to move from the third locked position to the third unlocked position. An operation limiting part 923 is disposed at an end of each operating protrusion 922 away from the operating body 921. The operation limiting portion 923 can abut against a surface of the bottom of the operating groove 5132 facing away from the operating groove 5132, to prevent the second operating member 920 from falling off the first mounting base 513.

[0105] Further, as shown in FIG. 39, the second limiting part 930 is fixed to or integrally formed on a surface of the pivotable member 700 facing away from the mounting recess 710. In this embodiment, the pivotable member 700 generally has a circular sheet-shaped structure. Two second limiting parts 930 are provided, and are arranged symmetrically with respect to the center axis of the pivotable member 700. In this embodiment, the second limiting part 930 is an engaging element 930'. One of the engaging elements 930' is taken as an example to describe its configuration in detail below. The engaging element 930' includes a connecting arm 931 and an engaging arm 932 that are arranged at an angle to each other. A first end of the connecting arm 931 is fixed to a surface of the pivotable member 700 facing away from the mounting recess 710, and a second end of the connecting arm 931 is connected to a first end of the engaging arm 932. A second end of the engaging arm 932 is a free end and extends toward the center of the pivotable member 700. The second mounting base 523 is provided with two arc-shaped second limiting grooves 5232. The engaging arms 932 of the two engaging elements 930' and at least a portion of the connecting arms 931 extend into the mounting cavity 102 through the two second limiting grooves 5232 respectively. When the pivotable member 700 rotates relative to the second mounting base 523, the two engaging elements 930' move along the two second limiting grooves 5232 respectively. When the limiting member 910 is in the third locked position, the two engaging arms 932 are engaged in the two first grooves 9111 or the two second grooves 9112 respectively. Specifically, when the two engaging arms 932 are engaged in the two first grooves 9111 respectively, the first backrest assembly 200 is in the first pivoted position (as shown in FIG. 21), and the high chair is in the first usage mode. When the two engaging arms 932 are engaged in the two second grooves 9112 respectively, the first backrest assembly 200 is in the second pivoted position (as shown in FIG. 22), and the high chair is in the second usage mode. In this embodiment, when the two engaging arms 932 are engaged in the two second grooves 9112 respectively, the two ends of the second backrest assembly 300 can also be inserted into the mounting recesses 710 of the two pivotable members 700 respectively, the high chair is in the third usage mode. In other embodiments not shown, when the two engaging arms 932 are engaged in two third grooves (not shown) respectively, the second backrest assembly 300 is in the third pivoted position (not shown), the high chair is in the third usage mode. When the limiting member 910 is in the third unlocked position, the limiting member 910 is positioned between the engaging arm 932 and the pivotable member 700 and is disengaged from the engaging arm 932.

[0106] Further, as shown in FIGS. 37 to 39, the third reset member 940 is disposed between the second mounting base 523 and the limiting member 910. The third reset member 940 is adapted to bias the limiting member 910 to move toward the third locked position. In this embodiment, the third restoring member 940 is a spring. The third reset member 940 is sleeved outside the mounting shaft 5231a, and includes one end abutting against the bottom of the first mounting groove 5131 and another end abutting against the limiting member 910. As such, the third reset member 940 can be prevented from being displaced during the biasing process.

[0107] The working principle of the inclination adjusting mechanism 900 is described in detail below.

[0108] When the first backrest assembly 200 is mounted on the second support frame 500 and the pivoted position of the first backrest assembly 200 is required to be adjusted, for example, when the first usage mode shown in FIG. 21 is required to be adjusted to the second usage mode shown in FIG. 22, as shown in FIG. 37, the operating body 921 of the second operating member 920 can be pressed in a fourth direction D4, so that the operating protrusion 922 of the second operating member 920 pushes against the limiting member 910 to move in the fourth direction D4 from the third locked position to the third unlocked position, the third return member 940 is compressed, and the limiting member 910 is positioned between the engaging arm 932 and the pivotable member 700, and the engaging arm 932 on the pivotable member 700 is disengaged from the first groove 9111 on the limiting member 910. In this case, the pivotable member 700 can pivot to the second pivoted position relative to the second mounting base 523, that is, the engaging arm 932 of the pivotable member 700 faces the second groove 9112 of the limiting member 910. Then, the pressing force exerted on the operating body 921 can be removed, and the limiting member 910 not pushed by the operating protrusion 922 can be reset to the third locked position under the elastic force of the third restoring member 940, so that the engaging arm 932 of the pivotable member 700 is engaged with the second groove 9112 of the limiting member 910, thereby maintaining the first backrest assembly 200 in the second pivoted position.

[0109] When the high chair is adjusted from the first usage mode shown in FIG. 21 to the third usage mode shown in FIG. 23, the working principle of the inclination adjusting mechanism 900 is the same as before, except that after the pivotable member 700 is adjusted to the second pivoted position, the two ends of the second backrest assembly 300 are required to be inserted into the mounting recesses 710 of the two pivoting members 700 respectively. In an embodiment not shown, when the high chair is in the third usage mode, the pivotable member 700 may also be in a third pivoted position that is different from the first pivoted position and the second pivoted position, and then the pivotable member 700 may be adjusted to the third pivoted position based on a principle similar to that described above.

[0110] Similar to the previous embodiment, the high chair does not necessarily include the first backrest assembly 200 and the second backrest assembly 300. The high chair may only have the first backrest assembly 200 or the second backrest assembly 300, that is, the user may only require the first usage mode and the second usage mode, or only require the third usage mode. In this way, the high chair can have different configurations according to user's needs.

[0111] The high chair according to one embodiment of the present application has at least the following technical effects.

[0112] The above-mentioned high chair can be in the first usage mode by being combined with the first backrest assembly 200 including the first backrest part 210 and the barrier part 220, and thus serve as a dining chair for a baby of a lower age (for example, a baby aged 6 months to 3 years old). The above-mentioned high chair can also be in the second usage mode by being connected to the second backrest assembly 300 including the second backrest part 310, and thus serve as a junior chair for a child of a lower age (for example, a child aged 3 to 12 years old). The above-mentioned high chair may not be connected to the first backrest part 210 and the second backrest part 310, and thus serve as an adult chair for an older child and adult (over 12 years old). In this way, the high chair can well meet the eating needs of children or adults of different ages by switching between a plurality of usage modes, and the usage scenarios are wider.

[0113] The high chair according to another embodiment of the present application has at least the following technical effects.

[0114] The above-mentioned high chair can be in the first usage mode by being combined with the first backrest assembly 200 including the seat part 240 and the first backrest part 210, and causing the first backrest assembly 200 to be in the first pivoted position, and thus serve as a chair for newborns under 6 months old. The above-mentioned high chair can also be in the second usage mode by being combined with the first backrest assembly 200 including the seat part 240 and the first backrest part 210, and causing the first backrest assembly 200 to be in the second pivoted position, and thus serve as a dining chair for a baby of a lower age (e.g., aged 6 months to 3 years). The above-mentioned high chair can also be connected to the second backrest assembly 300 to serve as a junior chair for an older child and an adult (aged 3 to 12 years old). In this way, the high chair can well meet the eating needs of children or adults of different ages by switching between a plurality of usage modes, and the usage scenarios are wider.

[0115] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features are described in the embodiments. However, as long as there is no contradiction in the combination of these technical features, the combinations should be considered as in the scope of the present application.

[0116] The above-described embodiments are only several implementations of the present application, and the descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present application. It should be understood by those of ordinary skill in the art that various modifications and improvements can be made without departing from the concept of the present application, and all fall within the protection scope of the present application. Therefore, the patent protection of the present application shall be defined by the appended claims.

Claims

1. A high chair, comprising:

a seat frame (100) comprising a first support frame (110) and a first seat plate (120) disposed on the first support frame (110);

a first backrest assembly (200) configured to be detachably connected to the seat frame (100), the first backrest assembly (200) comprising a first backrest part (210), a barrier part (220), and a first connecting part (230) that is configured to be connected to the seat frame (100); and

a second backrest assembly (300) configured to be detachably connected to the seat frame (100), the second backrest assembly (300) comprising a second backrest part (310) and a second connecting part (320) that is configured to be connected to the seat frame (100),

wherein the seat frame (100) is connectable to one of the first backrest assembly (200) and the second backrest assembly (300),

when the first backrest assembly (200) is fixedly connected to the seat frame (100), the high chair is in a first usage mode,

when the second backrest assembly (300) is fixedly connected to the seat frame (100), the high chair is in a second usage mode, and

when neither the first backrest assembly (200) nor the second backrest assembly (300) is connected to the first seat plate (120), the high chair is in a third usage mode.

2. The high chair according to claim 1, wherein the barrier part (220) comprises a transverse barrier (221) extending in a transverse direction of the first backrest assembly (200) and lateral barriers (222) extending in a longitudinal direction of the first backrest assembly (200); and the first connecting part (230) is disposed on at least one of the transverse barrier (221), lateral barriers (222), and the first backrest part (210).

3. The high chair according to any one of the preceding claims, wherein: the first connecting part (230) comprises a first vertical extension (231) and a first longitudinal extension (232) that are connected to each other and arranged at an angle to each other; the seat frame (100) is provided with a first coupling groove (130) corresponding to the first longitudinal extension (232); and the first longitudinal extension (232) is configured to be inserted into the first coupling groove (130).

4. The high chair according to claim 3, wherein an elastic finger (2322) is disposed on the first longitudinal extension (232); a first hole (131) corresponding to the elastic finger (2322) is disposed on a wall of the first coupling groove (130); and when the first longitudinal extension (232) is inserted into the first coupling groove (130), an elastic protrusion (2322a) of the elastic finger (2322) is slidable into the first hole (131).

5. The high chair according to claim 3 or 4, wherein a connection portion between the first longitudinal extension (232) and the first vertical extension (231) is bent to form an engaging recess (233), and when the first longitudinal extension (232) is inserted into the first coupling groove (130), the engaging recess (233) is engaged with an edge of the seat frame (100).

6. The high chair according to any one of the preceding claims, wherein the second connecting part (320) comprises a second vertical extension (321) and a second longitudinal extension (322) that are connected to each other and arranged at an angle to each other; an end of the second vertical extension (321) away from the second longitudinal extension (322) is fixedly connected to the second backrest part (310); and an end of the second longitudinal extension (322) away from the second vertical extension (321) is insertable into a coupling channel (150) of the seat frame (100).

7. The high chair according to claim 6, further comprising a locking mechanism (160),

wherein the locking mechanism (160) comprises a locking member (161) movably disposed on the seat frame (100); the second longitudinal extension (322) is provided with a locking hole (3222); and the locking member (161) has a first locked position and a first unlocked position, and

wherein when the second longitudinal extension (322) is inserted into the coupling channel (150), if the locking member (161) is in the first locked position, the locking member (161) is insertable into the locking hole (3222), and if the locking member (161) is in the first unlocked position, the locking member (161) is separatable from the locking hole (3222).

8. The high chair according to claim 7, wherein the locking mechanism (160) further comprises an unlocking member (162) drivingly connected to the locking member (161); and the unlocking member (162) is operable to drive the locking member (161) to move to the first unlocked position.

9. The high chair according to claim 7 or 8, wherein the locking mechanism (160) further comprises a first reset member (163) adapted to bias the locking member (161) to move toward the first locked position.

10. The high chair according to any one of the preceding claims, further comprising an adjusting member (116),

wherein the first support frame (110) comprises a plurality of legs (112) and a footrest (115) disposed between two legs (112) of the plurality of legs (112),

wherein a plurality of adjusting holes (1123) are disposed on the two legs (112) respectively; the plurality of adjusting holes (1123) on the two legs (112) are arranged facing each other,

wherein the footrest (115) comprises:

a plate body (1151); and

two plate connectors (1152) connected to two ends of the plate body (1151) respectively, and

wherein two adjusting members (116) extend through the two plate connectors (1152) respectively and are inserted into two of the plurality of adjusting holes (1123) facing each other respectively to fix the plate body (1151) at a certain position between the two legs (112).

11. The high chair according to any one of the preceding claims, further comprising a tray part (400) detachably connected to the barrier part (220) or the first backrest part (210),

wherein the tray part (400) comprises:

a tray body (410); and

tray connecting parts (420) protruding from two sides of the tray body (410) in a transverse direction; and

wherein the tray connecting parts (420) are provided with second coupling ends (421) respectively, and the barrier part (220) or the first backrest part (210) is provided with second coupling grooves (241) into which the second coupling ends (421) are insertable respectively.

12. The high chair according to any one of the preceding claims, wherein the first support frame (110) is provided with a backrest connecting part configured to be connected to the first backrest assembly (200) or the second backrest assembly (300),

when the backrest connecting part is connected to the first backrest assembly (200), the high chair is in the first usage mode,

when the backrest connecting part is connected to the second backrest assembly (300), the high chair is in the second usage mode, and

when the backrest connecting part is not connected to the first backrest assembly (200) or the second backrest assembly (300), the high chair is in the third usage mode.

13. The high chair according to claim 12, wherein the backrest connecting part is an engaging groove disposed on the first support frame (110), and an extending direction of the engaging groove is parallel to a plane where the first seat plate (120) is located;
and optionally wherein both the first backrest assembly (200) and the second backrest assembly (300) are connectable to the engaging groove; and the engaging groove extends in a longitudinal direction of the first seat plate (120).

14. The high chair according to claim 13, wherein the engaging groove comprises:

a first engaging groove configured to be connected to the first backrest assembly (200); and

a second engaging groove configured to be connected to the second backrest assembly (300),

wherein when the first engaging groove is not connected to the first backrest assembly (200) and the second engaging groove is not connected to the second backrest assembly (300), the high chair is in the third usage mode.

15. The high chair according to claim 14, wherein the first engaging groove and the second engaging groove extend in a longitudinal direction of the first seat plate (120); and the second engaging groove and the first engaging groove and are spaced apart from each other in a transverse direction of the first seat plate (120); or
wherein the first engaging groove extends in the longitudinal direction of the first seat plate (120), and the second engaging groove extend in the transverse direction of the first seat plate (120).

Drawing