FIELD OF THE INVENTION
[0001] The invention belongs to the technical field of daily necessities, and particularly
to a foldable dining chair.
BACKGROUND OF THE INVENTION
[0002] Foldable dining chairs are frequently used in real life, and especially dining chairs
for infants are most commonly used. A dining chair is generally used at mealtime only
and usually unnecessary, and therefore generally needs to have good foldability, which
not only facilitates folding, but also provides little occupied space after folding.
Dining chairs in the prior art are often improved in the above two aspects, or added
with some functions such as toys for infants, but these dining chairs are not improved
too much in terms of their use states.
[0003] However, based on a large number of practical use and investigation results, the
inventor has found that users also have requirements on use states in daily use; and
the use states of dining chairs are not very matching for different use environments
such as use at home and field use or with the growth of infants. Moreover, the function
of a single use state in the prior art cannot meet the above needs.
[0004] Accordingly, the inventor designs a foldable dining chair which has multiple use
states to suit different use environments and use needs, can be conveniently adjusted
among the states and has lower manufacturing cost.
[0005] A chair which is similar to the one of the invention is disclosed in
EP3090659 A1.
SUMMARY OF THE INVENTION
[0006] An object of the invention is to provide a foldable dining chair which has abundant
use states, can be conveniently adjusted and has lower manufacturing cost.
[0007] To achieve the above object, the invention is defined in claim 1 and adopts the following
scheme.
[0008] A foldable dining chair comprises a chair portion, a connecting shaft, a footrest
lever and telescopic chair legs; wherein the chair portion and the chair legs are
connected with the connecting shaft, and the weight borne by the chair portion is
dispersed to the individual chair legs by the connecting shaft. The chair portion
is located at an upper part of the dining chair, and comprises a seat board, a backrest
and a tray, wherein the backrest comprises a backrest frame; and four said chair legs
are provided, wherein the chair legs are separately arranged nearby two ends of the
connecting shaft, and respectively frontward and rearward to form a pair of front
legs and a pair of rear legs.
[0009] The front legs, the rear legs, the backrest frame and the footrest lever are rotatably
and fixedly fitted on the connecting shaft by a front leg bushing, a rear leg bushing,
a backrest frame bushing and a footrest lever bushing respectively, i.e. the front
legs, the rear legs, the backrest frame and the footrest lever can be rotated and
fixed along a circumferential direction of the connecting shaft, thus the use states
of the entire dining chair can be adjusted or the dining chair can be folded.
[0010] Each of the front leg bushing, the rear leg bushing, the backrest frame bushing and
the footrest lever bushing consists of a bushing body and a joint fixedly connected
with the bushing body, wherein the shape of the joint of each of the bushings as well
as the angular relation between the joint and the bushing body can be adaptably adjusted
according to the needs of each part. The bushing body is a hollow annular structure,
a connection mechanism for rotating and fixing each of the bushings is arranged on
an inner wall of the bushing body, and the connection mechanism comprises several
recesses and two limiting blocks; and the recesses are spacedly arranged along a circumferential
direction of the inner wall of the bushing body, and the limiting blocks are arranged
outside the two recesses at outermost ends.
[0011] The connecting shaft is also provided with a locking device which comprises a locking
block, a return spring, a moving block and a handle, wherein the locking block is
arranged on the connecting shaft in a manner of moving only along an axial direction
of the connecting shaft, several bumps matching the recesses of each of the bushings
are protruded on the locking block, each of the bushings can be locked after the bumps
are fitted into the recesses, a connecting post matching the moving block is arranged
at one end of the locking block, and two ends of the return spring are respectively
connected with or abutted against the locking block and the connecting shaft. The
moving block is provided with a sliding slot, an orienting slot and a connecting hole,
wherein the sliding slot is respectively obliquely arranged at two ends of the moving
block and matches the connecting post of the locking block, and the orienting slot
is a strip-shaped sliding slot and is arranged along a movement direction of the moving
block, thus the moving block can drive the locking block to displace in an axial direction
of the connecting shaft when moving along its movement direction. The handle is provided
with a fixing screw hole corresponding to the connecting hole on the moving block,
a fixing screw is passed through the fixing screw hole and then connected into the
connecting hole, and the connecting shaft is provided with a strip-shaped hole at
a position corresponding to the fixing screw hole.
[0012] The front leg bushing, the rear leg bushing, the backrest frame bushing and the footrest
lever bushing are sheathed in close proximity to one another on the connecting shaft,
and the individual bushings may be arrayed in any order. After each of the bushings
is sheathed on the connecting shaft, the limiting blocks also form several slidable
slots respectively communicated with all the recesses of the same bushing at one side
in a movement direction of the bumps, the size of the slidable slots matches that
of the bumps, and the limiting blocks also extend into the slidable slots, i.e. the
limiting blocks extend to form two ends of the slidable slots, thus restricting the
movement stroke of the bumps in the slidable slots.
[0013] The dining chair can be adjusted among several different use states. The dining chair
can be specifically designed and adjusted to have the following states including but
not limited to: a fully folded state; several unfolded use states (such states also
include various states in which the telescopic chair legs have different lengths)
in which the front legs and the rear legs are respectively unfolded, but have different
included angles and relative positions (relative to the chair portion); and a state
in which the front legs and the rear legs are retracted and overlapped (i.e. a state
in which the front legs and the rear legs together form new rear legs while the original
footrest lever is used as new front legs). The specific adjustment process will be
described below.
[0014] When a use state of the dining chair needs to be adjusted, an acting force is applied
to the handle, the handle drives the locking block to retract inwards or stretch outwards
by a certain distance in an axial direction of the connecting shaft, and then the
return spring is in a compressed or stretching state; after the displacement of the
locking block, the bumps leave the recesses and enter the slidable slots, then each
of the bushings is in a rotatable state to keep the external force unchanged, and
the bushing to be adjusted is rotated to a specified angle; and after the individual
bushings are respectively adjusted to a specified angle, the external force is removed,
the locking block is restored to an original state under the action of the return
spring, the individual bumps enter the corresponding recesses, and each of the bushings
is locked by the locking device and hence cannot be displaced or rotated, such that
the dining chair is adjusted to a new state and in a locked safe state. During adjustment,
a certain bump enters another recess from one recess of a corresponding bushing by
a slidable slot; and the limiting blocks are arranged at two ends of the slidable
slots to restrict the rotation angle of the bushing (i.e. the movement stroke of the
bumps), thus avoiding unnecessary trouble in use.
[0015] It should be noted that the arrangement position and the relative positional relation
of the individual bumps on the locking block, the number and the mutual angles of
the recesses arranged on each of the bushings, the overall arrangement position of
the recesses on the inner wall as well as the relative positional and angular relation
between the recesses and the joint can be correspondingly designed by those skilled
in the art according to the inventive concept of the present application and the actual
needs of the overall functional design of the dining chair, as long as the adjustment
of the relative position between the bumps and the recesses can be changed and can
meet the desired functional requirements.
[0016] In the scheme, the parts of the dining chair that need to be adjusted or folded in
daily use are fitted on other parts by a unique structural design, such that the dining
chair can have more abundant use states, and it also becomes easier to adjust the
dining chair among various states and integrally fold the dining chair; and the dining
chair overcomes the disadvantages of only one use state and only one folded state
in an existing dining chair, and has abundant use states. Moreover, the dining chair
of the present application is ingenious in structure and convenient to use, thus designers
can easily achieve the dining chair with different use states by correspondingly setting
the number and position of the recesses on each of the bushings, the positional relation
between the overall distribution of the recesses and the joint, the shape of the joint
itself, the corresponding position of the locking block on the connecting shaft as
well as the arrangement position of the bumps according to functional needs. In the
scheme, each part has lower machining cost due to lower machining requirements. In
summary, an adjustable and foldable dining chair which has abundant use states and
is convenient to use can be manufactured by lower machining cost and design requirements
in the scheme.
[0017] Preferably, the locking device further comprises a double-lock mechanism which consists
of a safety block, a return spring and a bayonet, wherein the safety block is provided
with a chuck, and arranged on the handle by the return spring, and the bayonet is
arranged on the connecting shaft and matches the chuck. The double-lock mechanism
functions to protect the locking device, which prevents the dining chair from being
unexpectedly adjusted in a normal use state. With the double-lock mechanism, the locking
device is normally in a locked state and therefore the dining chair is stable, thus
avoiding unexpected accidents; and an acting force needs to be continuously applied
to the double-lock mechanism when the dining chair needs to be adjusted, thus significantly
improving the safety of the dining chair in use.
[0018] Preferably, the individual bumps on the locking block are disposed in linear arrangement
along an axial direction of the connecting shaft. In this way, the difficulty in manufacturing
the locking block can be reduced and the functional design of the dining chair is
also generally not affected. Preferably, the chair legs consist of several sub-rods
and connecting blocks, wherein the connecting block consists of an upper interface,
a lower interface and an adjusting block, the upper interface and the lower interface
are respectively provided for connecting two adjacent sub-rods, the adjusting block
is arranged on the upper interface or the lower interface by a rotating shaft and
a torsion spring, and the adjusting block and the sub-rod connected with the lower
interface or the upper interface are correspondingly provided with a through hole
and a stud respectively. Preferably, the dining chair further comprises a reinforcing
cross bar which is arranged between two connecting blocks of the same height on the
front legs or the rear legs. The reinforcing cross bar can improve the structural
strength and stability of the chair legs.
[0019] Preferably, the two ends of the connecting shaft respectively further comprise an
outer cap which consists of an outer cap head and a fixing block, wherein the fixing
block is fixedly connected at an outer end of the connecting shaft and limits the
footrest lever bushing at an outermost side, each of the bushings is axially fixed
by a structure at a middle part of the connecting shaft and the fixing block, and
the outer cap head is clamped with the footrest lever bushing. Each of the bushings
is fixed in an axial direction of the connecting shaft by the outer cap and a top
block arranged at the middle part of the connecting shaft.
[0020] Preferably, the front leg bushing, the rear leg bushing, the footrest lever bushing
and the backrest frame bushing have the same or gradually changing outer diameter.
[0021] Preferably, the backrest consists of a backrest frame and canvas, wherein the canvas
is arranged between the backrest frame and the seat board, and has a periphery fixedly
connected with the backrest frame and the seat board respectively.
[0022] Preferably, the footrest lever is also provided with an anti-skid footrest which
is made of a high molecular material and has a larger contact area.
[0023] Preferably, the tray is also provided with an L-shaped hanging rod, one end of which
is hinged at a periphery of the tray, and which is formed integrally with the tray
when folded.
[0024] The dining chair of the invention overcomes the defects of insufficient use states
in an existing dining chair (only one use state and only one folded state), and has
abundant use states. Moreover, the dining chair of the present application is ingenious
in structure and convenient to use, thus designers can easily achieve the dining chair
with different use states by correspondingly setting the number and position of the
recesses on each of the bushings, the positional relation between the overall distribution
of the recesses and the joint, the shape of the joint itself, the corresponding position
of the locking block on the connecting shaft as well as the arrangement position of
the bumps according to functional needs. In the scheme, each part has lower machining
cost due to lower machining requirements. In summary, an adjustable and foldable dining
chair which has abundant use states and is convenient to use can be manufactured by
lower machining cost and design requirements in the scheme.
BRIEF DESCRIPTION OF THE DRAWINGS
[0025]
Fig. 1 is a three-dimensional schematic structural view of an embodiment of the invention;
Fig. 2 is a front exploded view of Fig. 1;
Fig. 3 is a three-dimensional schematic view of main components;
Fig. 4 is a schematic view of fitting at a connecting shaft;
Fig. 5 is a half-side exploded view of Fig. 4;
Fig. 6 is a three-dimensional schematic structural view of a rear leg bushing;
Fig. 7 is a three-dimensional schematic structural view of a front leg bushing;
Fig. 8 is a three-dimensional schematic structural view of a backrest frame bushing;
Fig. 9 is a three-dimensional schematic structural view of a footrest lever bushing;
Fig. 10 is a schematic structural view of the connecting shaft of the embodiment;
Fig. 11 is a schematic structural view of a locking device;
Fig. 12 is a schematic structural view of a locking block;
Fig. 13 is a schematic structural view of a moving block;
Fig. 14 is a schematic structural view of a handle of the embodiment;
Fig. 15 is an exploded view resulting from Fig. 14; and
Fig. 16 is a three-dimensional schematic view of one use state of the embodiment.
[0026] In the Figures: 1. chair portion; 2. connecting shaft; 3. footrest lever; 4. chair
leg; 11. seat board; 12. backrest; 13. tray; 14. hanging rod; 15. backrest frame;
21. bayonet; 22. groove; 23. outer cap; 24. strip-shaped hole; 25. top block; 31.
anti-skid footrest; 41. sub-rod; 42. connecting block; 43. front leg; 44. rear leg;
45. reinforcing cross bar; 51. front leg bushing; 52. rear leg bushing; 53. backrest
frame bushing; 54. footrest lever bushing; 551. bushing body; 552. joint; 561. first
recess; 562. second recess; 563. third recess; 57. limiting block; 58. slidable slot;
6. locking device; 61. locking block; 62. return spring; 63. moving block; 64. handle;
611. bump; 612. connecting post; 631. sliding slot; 632. orienting slot; 633. connecting
hole; 641. fixing screw hole; 65. double-lock mechanism; 651. safety block; 652. return
spring; 653. chuck; 231. outer cap head; 232. fixing block.
DETAILED DESCRIPTION OF THE INVENTION
[0027] A foldable dining chair comprises a chair portion, a connecting shaft, a footrest
lever and telescopic chair legs; wherein the chair portion and the chair legs are
connected with the connecting shaft, and the weight borne by the chair portion is
dispersed to the individual chair legs by the connecting shaft. The chair portion
is located at an upper part of the dining chair, and comprises a seat board, a backrest
and a tray, wherein the backrest comprises a backrest frame; and four said chair legs
are provided, wherein the chair legs are separately arranged nearby two ends of the
connecting shaft, and respectively frontward and rearward to form a pair of front
legs and a pair of rear legs, i.e. two chair legs are arranged nearby each of two
ends of the connecting shaft, the two chair legs at each end are respectively arranged
frontwards (i.e. the orientation of the chair portion) and rearwards to form a front
leg and a rear leg respectively, and the mutual positions of the front legs and the
rear legs may be random, i.e. the front legs are inside and the rear legs are outside
or the front legs are outside and the rear legs are inside.
[0028] The front legs, the rear legs, the backrest frame and the footrest lever are rotatably
and fixedly fitted on the connecting shaft by a front leg bushing, a rear leg bushing,
a backrest frame bushing and a footrest lever bushing respectively, i.e. the front
legs, the rear legs, the backrest frame and the footrest lever can be rotated and
fixed along a circumferential direction of the connecting shaft, thus the use states
of the entire dining chair can be adjusted or the dining chair can be folded.
[0029] Each of the front leg bushing, the rear leg bushing, the backrest frame bushing and
the footrest lever bushing consists of a bushing body and a joint fixedly connected
with the bushing body, wherein the shape of the joint of each of the bushings (i.e.
the front leg bushing, the rear leg bushing, the backrest frame bushing and the footrest
lever bushing) as well as the angular relation between the joint and the bushing body
can be adaptably adjusted according to the needs of each of the parts (i.e. the front
legs, the rear legs, the backrest frame and the footrest lever), which does not affect
the implementation of the present application. The bushing body is a hollow annular
structure, a connection mechanism for rotating and fixing each of the bushings is
arranged on an inner wall of the bushing body, and the connection mechanism comprises
several recesses and two limiting blocks; and the recesses are spacedly arranged along
a circumferential direction of the inner wall of the bushing body (i.e. the individual
recesses are arranged at a certain included angle relative to one another on the inner
wall of the bushing body), and the limiting blocks are arranged outside the two recesses
at outermost ends.
[0030] The connecting shaft is also provided with a locking device which comprises a locking
block, a return spring, a moving block and a handle, wherein the locking block is
arranged on the connecting shaft in a manner of moving only along an axial direction
of the connecting shaft (for example, the connecting shaft is provided with an axially
extending groove and the locking block is arranged in the groove, or the connecting
shaft is provided with an axially extending guide slot or guide rail and the locking
block is correspondingly provided with a mechanism matching the guide slot or guide
rail, or other structures publicly known in the prior art which allow the locking
block to move only axially relative to the guide slot or guide rail); several bumps
matching the recesses of each of the bushings are protruded on the locking block;
the arrangement position and the arraying manner of the bumps are not strictly and
directly restricted, as long as each of the bushings can be locked after the bumps
are fitted into the recesses; a connecting post matching the moving block is arranged
at one end of the locking block; and two ends of the return spring are respectively
connected with or abutted against the locking block and the connecting shaft. The
moving block is provided with a sliding slot, an orienting slot and a connecting hole,
wherein the sliding slot is respectively obliquely arranged at two ends of the moving
block and matches the connecting post of the locking block, and the orienting slot
is a strip-shaped sliding slot and is arranged along a movement direction of the moving
block, thus the moving block can drive the locking block to displace in an axial direction
of the connecting shaft when moving along its movement direction. The handle is provided
with a fixing screw hole corresponding to the connecting hole on the moving block,
a fixing screw is passed through the fixing screw hole and then connected into the
connecting hole, and the connecting shaft is provided with a strip-shaped hole at
a position corresponding to the fixing screw hole.
[0031] The front leg bushing, the rear leg bushing, the backrest frame bushing and the footrest
lever bushing are sheathed in close proximity to one another on the connecting shaft,
and the individual bushings are arrayed in any order (i.e. the front leg bushing,
the rear leg bushing, the backrest frame bushing and the footrest lever bushing may
be sequentially fitted on the connecting shaft in any order for the present application,
or even the fitting manner of the individual bushings at two ends is also not restricted,
which does not affect the implementation of the present application). After each of
the bushings (i.e. the front leg bushing, the rear leg bushing, the backrest frame
bushing and the footrest lever bushing) is sheathed on the connecting shaft, the limiting
blocks also form several slidable slots respectively communicated with all the recesses
of the same bushing at one side in a movement direction of the bumps (i.e. at one
side in a movement direction of the locking block), the size of the slidable slots
matches that of the bumps, and the limiting blocks also extend into the slidable slots,
i.e. the limiting blocks extend into the slidable slots to form two ends of the slidable
slots, thus restricting the movement stroke of the bumps in the slidable slots.
[0032] The process of using the dining chair will be described in detail so that those skilled
in the art have a clearer understanding of relevant structures and their positional
relation.
[0033] The dining chair may have several different use states, for example, the respective
positions and the mutual angles of the front chair legs and the rear chair legs are
adjustable. Besides, most of the existing dining chairs have a folding function, and
the dining chair of the present application also has such function. Although the functions
of the dining chair in terms of use angles have been described above, these functions
are technically realized by adjusting the relative positional or angular relation
between components and the connecting shaft, and more specifically, mainly realized
by adjusting the positional relation between the individual bumps and the individual
recesses.
[0034] When a use state of the dining chair (i.e. the fitting relation between each of the
bushings and the connecting shaft) needs to be adjusted, an acting force is applied
to the handle, the handle drives the locking block to move by a certain distance in
an axial direction of the connecting shaft, i.e. to retract inwards or stretch outwards
by a certain distance; then the return spring is in a compressed or stretching state;
after the displacement of the locking block, the bumps leave the recesses and enter
the slidable slots, then each of the bushings is in a rotatable state to keep the
external force unchanged, and the bushing to be adjusted is rotated to a specified
angle; and after the individual bushings are respectively adjusted to a specified
angle, the external force is removed, the locking block is restored to an original
state under the action of the return spring, the individual bumps enter the corresponding
recesses, and since the locking block cannot move circumferentially, each of the bushings
is locked by the locking device and hence cannot be displaced or rotated in all directions.
The dining chair is adjusted to a new state and in a locked safe state. During adjustment,
a certain bump enters another recess from one recess of a corresponding bushing by
a slidable slot; and the limiting blocks are arranged at two ends of the slidable
slots to restrict the rotation angle of the bushing (i.e. the movement stroke of the
bumps). The adjustment process of the dining chair has been explained in detail above.
It should be noted that the arrangement position and the relative positional relation
of the individual bumps on the locking block, the number and the mutual angles of
the recesses arranged on each of the bushings, the overall arrangement position of
the recesses on the inner wall as well as the relative positional and angular relation
between the recesses and the joint can be correspondingly designed according to the
needs of the overall functional design of the dining chair, as long as the adjustment
of the relative position between the bumps and the recesses can be changed and can
meet the desired functional requirements. The above-described adaptability adjustment
that can be made by those skilled in the art according to the inventive concept of
the present application belongs to the protection scope of the present application.
Embodiment
[0035] As shown in Figs. 1-10, a foldable dining chair consists of a chair portion 1, a
connecting shaft 2, a footrest lever 3 and telescopic chair legs 4; wherein the chair
portion 1 and the chair legs 4 are connected with the connecting shaft 2, and the
weight borne by the chair portion 1 is dispersed to the individual chair legs 4 by
the connecting shaft 2. The telescopic chair legs 4 consist of several sub-rods 41
and connecting blocks 42, wherein the connecting block 42 consists of an upper interface,
a lower interface and an adjusting block, the upper interface and the lower interface
are respectively provided for connecting two adjacent sub-rods 41, the adjusting block
is arranged on the upper interface or the lower interface by a rotating shaft and
a torsion spring, and the adjusting block and the sub-rod connected with the lower
interface or the upper interface are correspondingly provided with a through hole
and a stud respectively. The length of the chair legs can be telescopically adjusted
after the stud is removed from the through hole, and the locking operation of the
chair legs can be performed after the stud is fitted into the through hole. The front
legs or the rear legs of the dining chair are also provided with a reinforcing cross
bar 45 which is arranged between two connecting blocks 42 of the same height on the
front legs 43 or the rear legs 44. Two ends of the reinforcing cross bar 45 are connected
to the two connecting blocks 42 by clamping, pins, screws or welding.
[0036] The chair portion 1 is located at an upper part of the dining chair, and consists
of parts such as a seat board 11, a backrest 12 and a tray 13, wherein the backrest
12 consists of a backrest frame 15 and canvas, and the canvas is arranged between
the backrest frame 15 and the seat board 11, and has a periphery fixedly connected
with the backrest frame 15 and the seat board 11 respectively; and the tray 13 is
also provided with an L-shaped hanging rod 14, wherein one end of the hanging rod
is hinged at a periphery of the tray 13, and the hanging rod is formed integrally
with the tray when folded, thus the hanging rod can be used as a hanging rod for toys
when unfolded and does not affect the overall aesthetics of the tray when folded.
Four said chair legs are provided, wherein the chair legs are divided into a group
of two front legs 43 and a group of two rear legs 44, and the front legs 43 and the
rear legs 44 are respectively arranged nearby two ends of the connecting shaft 1.
The front legs 43 and the rear legs 44 are respectively fitted on the connecting shaft
2 by a front leg bushing 51 and a rear leg bushing 52, the backrest frame 15 is fitted
on the connecting shaft 2 by a backrest frame bushing 53, and the footrest lever 3
is fitted on the connecting shaft 2 by a footrest lever bushing 54; and the rear leg
bushing 52, the front leg bushing 51, the backrest frame bushing 53 and the footrest
lever bushing 54 are sequentially fitted on the connecting shaft 2 from inside to
outside. The front leg bushing 51, the rear leg bushing 52, the footrest lever bushing
54 and the backrest frame bushing 53 used in the embodiment have the same outer diameter
such that the portions on the connecting shaft seem to have the same specification;
and, of course, it is also possible if the individual bushings are gradually changing
in appearance.
[0037] The front leg bushing 51 consists of a bushing body 551 and a joint 552, wherein
the bushing body 551 is a hollow annular structure and hence can be sheathed outside
the connecting shaft 2, and the joint 552 is fixedly connected with the bushing body
551 to allow the front leg 43 to be fixedly connected therewith; and the front leg
43 can be fixedly connected with the joint 552 by clamping, screws and other approaches
capable of realizing fixed connection in the prior art. A connection mechanism is
arranged on an inner wall of the bushing body 551, and the connection mechanism consists
of three recesses and two limiting blocks 57; and the recesses are spacedly arranged
along a circumferential direction of an inner wall of the front leg bushing 51, the
individual recesses are at a certain included angle relative to one another, the three
recesses respectively include a first recess 561, a second recess 562 and a third
recess 563, and the limiting blocks 57 are arranged outside the two recesses (i.e.
the first recess 561 and the third recess 563) at two ends.
[0038] The rear leg bushing 52 consists of a bushing body 551 and a joint 552, wherein the
bushing body 551 is a hollow annular structure and hence can be sheathed outside the
connecting shaft 2, and the joint 552 is fixedly connected with the bushing body 551
to allow the rear leg 44 to be fixedly connected therewith; and the rear leg 44 can
be fixedly connected with the joint 552 by clamping, screws and other approaches capable
of realizing fixed connection in the prior art. A connection mechanism is arranged
on an inner wall of the bushing body 551, and the connection mechanism consists of
three recesses and two limiting blocks 57; and the recesses are spacedly arranged
along a circumferential direction of an inner wall of the rear leg bushing 52, the
individual recesses are at a certain included angle relative to one another, the three
recesses respectively include a first recess 561, a second recess 562 and a third
recess 563, and the limiting blocks are arranged outside the two recesses (i.e. the
first recess and the third recess) at two ends.
[0039] The backrest frame bushing 53 consists of a bushing body 551 and a joint 552, wherein
the bushing body 551 is a hollow annular structure and hence can be sheathed outside
the connecting shaft 2, and the joint 552 is fixedly connected with the bushing body
551 to allow the backrest frame 15 to be fixedly connected therewith; and the backrest
frame 15 can be fixedly connected with the joint 552 by clamping, screws and other
approaches capable of realizing fixed connection in the prior art. A connection mechanism
is arranged on an inner wall of the bushing body 551, and the connection mechanism
consists of two recesses and two limiting blocks 57; and the recesses are spacedly
arranged along a circumferential direction of an inner wall of the backrest frame
bushing 53, the two recesses respectively include a first recess 561 and a second
recess 562 which are arranged at a certain included angle relative to each other,
and the limiting blocks 57 are arranged outside the first recess and the second recess.
[0040] The footrest lever bushing 54 consists of a bushing body 551 and a joint 552, wherein
the bushing body 551 is a hollow annular structure and hence can be sheathed outside
the connecting shaft 2, and the joint 552 is fixedly connected with the bushing body
551 to allow the footrest lever 3 to be fixedly connected therewith; and the footrest
lever 3 can be fixedly connected with the joint 552 by clamping, screws and other
approaches capable of realizing fixed connection in the prior art. A connection mechanism
is arranged on an inner wall of the bushing body 551, and the connection mechanism
consists of two recesses and two limiting blocks 57; and the recesses are spacedly
arranged along a circumferential direction of an inner wall of the footrest lever
bushing 54, the two recesses respectively include a first recess 561 and a second
recess 562 which are arranged at a certain included angle relative to each other,
and the limiting blocks 57 are arranged outside the first recess and the second recess.
The footrest lever 3 is provided with an anti-skid footrest 31 which is made of a
high molecular material and has a larger contact area.
[0041] The connecting shaft 2 is also provided with a locking device 6 which consists of
parts such as a locking block 61, a return spring 62, a moving block 63 and a handle
64, wherein several bumps 611 disposed in linear arrangement along an axial direction
of the connecting shaft and matching the recesses on each of the bushings are protruded
nearby one end of the locking block 61; the connecting shaft is provided with a groove
22 extending along its axial direction, and the locking block 61 is movably arranged
in the groove such that the locking block is arranged in the connecting shaft in a
manner of moving only along an axial direction of the connecting shaft, and the bumps
611 are fitted into the recesses on each of the bushings to lock each of the bushings,
thus preventing each of the bushings from rotating about the connecting shaft; a connecting
post 612 matching the moving block is arranged at the other end of the locking block
61, and two ends of the return spring 62 are respectively connected with or abutted
against the locking block 61 and the connecting shaft 2; the moving block 63 is provided
with a sliding slot 631, an orienting slot 632 and a connecting hole 633, the sliding
slot 631 is respectively obliquely arranged at two ends of the moving block 63 and
matches the connecting post 612 of the locking block 61, and the orienting slot 632
is a strip-shaped sliding slot and is arranged along a movement direction of the moving
block 63; and the handle 64 is provided with a fixing screw hole 641 corresponding
to the connecting hole 633 on the moving block 63, a fixing screw is passed through
the fixing screw hole 641 and then connected into the connecting hole 633, and the
connecting shaft 2 is provided with a strip-shaped hole 24 at a position corresponding
to the fixing screw hole 641 such that the locking device can move normally to drive
the locking block to move leftwards and rightwards in an axial direction of the connecting
shaft and return to an original position (the handle moves forward or backward relative
to the dining chair by a force applied thereto, the sliding slot obliquely arranged
on the moving block drives the locking block to move leftwards and rightwards, and
the spring is used for restoring the locking device to a locked state after the external
force is removed). The locking device further comprises a double-lock mechanism 65
which consists of a safety block 651 and a return spring 652, wherein the safety block
651 is provided with a chuck 653, and arranged on the handle 64 by the return spring
652, and the connecting shaft 2 is provided with a bayonet 21 matching the chuck 653.
[0042] The two ends of the connecting shaft 2 respectively further comprise an outer cap
23 which consists of an outer cap head 231 and a fixing block 232, wherein the fixing
block 232 is fixedly connected at an outer end of the connecting shaft 2 and limits
the footrest lever bushing 54 at an outermost side, each of the bushings is axially
fixed by a top block 25 at a middle part of the connecting shaft 2 and the fixing
block 232, and the outer cap head 231 is clamped with the footrest lever bushing 54.
1. A foldable dining chair, comprising a chair portion (1), a connecting shaft (2), a
footrest lever (3) and telescopic chair legs (4); the chair portion and the chair
legs being connected with the connecting shaft; the chair portion being located at
an upper part of the dining chair, and comprising a seat board (11), a backrest (12)
and a tray (13), and the backrest comprising a backrest frame (15); and four said
chair legs being provided, and the chair legs being separately arranged nearby two
ends of the connecting shaft and respectively frontward and rearward to form a pair
of front legs and a pair of rear legs; wherein,
the front legs, the rear legs, the backrest frame and the footrest lever are rotatably
fitted on the connecting shaft by a front leg bushing (51), a rear leg bushing (52),
a backrest frame bushing (53) and a footrest lever bushing (54) respectively;
each of the front leg bushing, the rear leg bushing, the backrest frame bushing and
the footrest lever bushing consists of a bushing body and a joint fixedly connected
with the bushing body, the bushing body being a hollow annular structure, a connection
mechanism being arranged on an inner wall of the bushing body, and the connection
mechanism comprising several recesses and two limiting blocks (57); and the recesses
being spacedly arranged along a circumferential direction of the inner wall of the
bushing body, and the limiting blocks being arranged outside the two recesses at outermost
ends;
the connecting shaft is also provided with a locking device (6) which comprises a
locking block (61), a return spring (62), a moving block (63) and a handle (64), the
locking block being arranged on the connecting shaft in a manner of moving only along
an axial direction of the connecting shaft, several bumps (611) matching the recesses
of each of the bushings being protruded on the locking block, a connecting post (612)
matching the moving block being arranged at one end of the locking block, and two
ends of the return spring being respectively connected with or abutted against the
locking block and the connecting shaft; the moving block being provided with a sliding
slot (631), an orienting slot (632) and a connecting hole (633), the sliding slot
being respectively obliquely arranged at two ends of the moving block and matching
the connecting post of the locking block, and the orienting slot being a strip-shaped
sliding slot and being arranged along a movement direction of the moving block; and
the handle being provided with a fixing screw hole (641) corresponding to the connecting
hole on the moving block, a fixing screw being passed through the fixing screw hole
and then connected into the connecting hole, and the connecting shaft being provided
with a strip-shaped hole at a position corresponding to the fixing screw hole; and
the front leg bushing, the rear leg bushing, the backrest frame bushing and the footrest
lever bushing are sheathed in close proximity to one another on the connecting shaft
in any order; and after each of the bushings is sheathed on the connecting shaft,
the limiting blocks also form several slidable slots respectively communicated with
all the recesses of the same bushing at one side in a movement direction of the bumps,
the size of the slidable slots matches that of the bumps, and the limiting blocks
also extend into the slidable slots.
2. The foldable dining chair according to claim 1, wherein the locking device further
comprises a double-lock mechanism which consists of a safety block, a return spring
and a bayonet, the safety block being provided with a chuck and arranged on the handle
by the return spring, and the bayonet being arranged on the connecting shaft and matching
the chuck.
3. The foldable dining chair according to claim 1, wherein the individual bumps on the
locking block are disposed in linear arrangement along an axial direction of the connecting
shaft.
4. The foldable dining chair according to claim 1, wherein the chair legs consist of
several sub-rods and connecting blocks, the connecting block consisting of an upper
interface, a lower interface and an adjusting block, the upper interface and the lower
interface being respectively provided for connecting two adjacent sub-rods, the adjusting
block being arranged on the upper interface or the lower interface by a rotating shaft
and a torsion spring, and the adjusting block and the sub-rod connected with the lower
interface or the upper interface being correspondingly provided with a through hole
and a stud respectively.
5. The foldable dining chair according to claim 4, wherein the dining chair further comprises
a reinforcing cross bar which is arranged between two connecting blocks of the same
height on the front legs or the rear legs.
6. The foldable dining chair according to claim 1, wherein the two ends of the connecting
shaft respectively further comprise an outer cap which consists of an outer cap head
and a fixing block, the fixing block being fixedly connected at an outer end of the
connecting shaft and limiting the bushing at an outermost side, and the outer cap
head being clamped with the footrest lever bushing.
7. The foldable dining chair according to claim 1, wherein the front leg bushing, the
rear leg bushing, the footrest lever bushing and the backrest frame bushing have the
same or gradually changing outer diameter.
8. The foldable dining chair according to claim 1, wherein the backrest consists of a
backrest frame and canvas, the canvas being arranged between the backrest frame and
the seat board, and having a periphery fixedly connected with the backrest frame and
the seat board respectively.
9. The foldable dining chair according to claim 1, wherein the footrest lever is also
provided with an anti-skid footrest which is made of a high molecular material.
10. The foldable dining chair according to claim 1, wherein the tray is also provided
with an L-shaped hanging rod, one end of which is hinged at a periphery of the tray,
and which is formed integrally with the tray when folded.
1. Zusammenklappbarer Speisestuhl, umfassend einen Stuhlabschnitt (1), eine Verbindungswelle
(2), einen Fußstützenhebel (3) und teleskopische Stuhlbeine (4);
wobei der Stuhlabschnitt und die Stuhlbeine mit der Verbindungswelle verbunden sind;
der Stuhlabschnitt sich in einem oberen Teil des Speisestuhls befindet und ein Sitzbrett
(11), eine Rückenlehne (12) und ein Essbrett (13) umfasst, und die Rückenlehne einen
Rückenlehnenrahmen (15) umfasst;
und vier Stuhlbeine vorgesehen sind, und die Stuhlbeine in der Nähe zweier Enden der
Verbindungswelle getrennt und vorne bzw. hinten angeordnet sind, um ein Paar von Vorderbeinen
und ein Paar von Hinterbeinen zu bilden; wobei
die Vorderbeine, die Hinterbeine, der Rückenlehnenrahmen und der Fußstützenhebel durch
eine Vorderbeinhülse (51), eine Hinterbeinhülse (52), eine Rückenlehnenrahmenhülse
(53) bzw. eine Fußstützenhebelhülse (54) drehbar auf der Verbindungswelle installiert
sind;
jede der Vorderbeinhülse, der Hinterbeinhülse, der Rückenlehnenrahmenhülse und der
Fußstützenhebelhülse aus einem Hülsenkörper und einer Verbindung besteht, das mit
dem Hülsenkörper fest verbunden ist, wobei der Hülsenkörper eine hohle, ringförmige
Struktur ist, ein Verbindungsmechanismus auf einer Innenwand des Hülsenkörpers angeordnet
ist, und der Verbindungsmechanismus mehrere Aussparungen und zwei Begrenzungsblöcke
(57) umfasst; und
die Aussparungen entlang einer Umfangsrichtung der Innenwand des Hülsenkörpers in
einem Abstand angeordnet sind, und die Begrenzungsblöcke außerhalb der zwei Aussparungen
an äußersten Enden angeordnet sind;
die Verbindungswelle außerdem mit einer Verriegelungsvorrichtung (6) versehen ist,
die einen Verriegelungsblock (61), eine Rückstellfeder (62), einen beweglichen Block
(63) und einen Griff (64) umfasst, wobei der Verriegelungsblock derart auf der Verbindungswelle
angeordnet ist, dass er sich nur entlang einer axialen Richtung der Verbindungswelle
bewegt, mehrere Höcker (611), die mit den Aussparungen einer jeden der Hülsen zusammenpassen,
auf dem Verriegelungsblock vorstehen, eine Verbindungssäule (612), die mit dem beweglichen
Block zusammenpasst, an einem Ende des Verriegelungsblocks angeordnet ist, und zwei
Enden der Rückstellfeder mit dem Verriegelungsblock bzw. der Verbindungswelle verbunden
sind oder daran anliegen;
der bewegliche Block mit einem Schiebeschlitz (631), einem Ausrichtschlitz (632) und
einem Verbindungsloch (633) versehen ist, wobei der Schiebeschlitz an zwei Enden des
beweglichen Blocks jeweils schräg angeordnet ist und mit der Verbindungssäule des
Verriegelungsblocks zusammenpasst, und der Ausrichtschlitz ein streifenförmiger Schiebeschlitz
und entlang einer Bewegungsrichtung des beweglichen Blocks angeordnet ist; und
der Griff mit einem Befestigungsschraubenloch (641) versehen ist, das dem Verbindungsloch
auf dem beweglichen Block entspricht, wobei eine Befestigungsschraube durch das Befestigungsschraubenloch
eingeführt und dann in das Verbindungsloch gekoppelt wird, und die Verbindungswelle
in einer Position, die dem Befestigungsschraubenloch entspricht, mit einem streifenförmigen
Loch versehen ist; und
die Vorderbeinhülse, die Hinterbeinhülse, die Rückenlehnenrahmenhülse und die Fußstützenhebelhülse
in unmittelbarer Nähe zueinander in beliebiger Reihenfolge auf der Verbindungswelle
angeordnet sind; und die Begrenzungsblöcke nach dem Anordnen einer jeden der Hülsen
auf der Verbindungswelle außerdem mehrere Schiebeschlitze bilden, die jeweils mit
allen der Aussparungen der gleichen Hülse auf einer Seite in einer Bewegungsrichtung
der Höcker in Verbindung stehen, wobei die Größe der Schiebeschlitze mit jener der
Höcker übereinstimmt, und die Begrenzungsblöcke sich außerdem in die Schiebeschlitze
erstrecken.
2. - Zusammenklappbarer Speisestuhl nach Anspruch 1, wobei die Verriegelungsvorrichtung
ferner einen Doppelverriegelungsmechanismus umfasst, der aus einem Sicherheitsblock,
einer Rückstellfeder und einem Bajonett besteht, wobei der Sicherheitsblock mit einer
Spannvorrichtung versehen und auf dem Griff durch die Rückstellfeder angeordnet ist,
und das Bajonett auf der Verbindungswelle angeordnet ist und mit der Spannvorrichtung
zusammenpasst.
3. Zusammenklappbarer Speisestuhl nach Anspruch 1, wobei die einzelnen Höcker auf dem
Verriegelungsblock in linearer Anordnung entlang einer axialen Richtung der Verbindungswelle
angeordnet sind.
4. Zusammenklappbarer Speisestuhl nach Anspruch 1, wobei die Stuhlbeine aus mehreren
Teilstangen und Verbindungsblöcken bestehen, wobei der Verbindungsblock aus einer
oberen Schnittstelle, einer unteren Schnittstelle und einem Stellblock besteht, die
obere Schnittstelle und die untere Schnittstelle jeweils zum Verbinden zweier benachbarter
Teilstangen vorgesehen sind, der Stellblock auf der oberen Schnittstelle oder der
unteren Schnittstelle durch eine Drehwelle und eine Torsionsfeder angeordnet ist,
und der Stellblock und die mit der unteren Schnittstelle oder der oberen Schnittstelle
verbundene Teilstange entsprechend mit einem Durchgangsloch bzw. einem Stift versehen
sind.
5. Zusammenklappbarer Speisestuhl nach Anspruch 4, wobei der Speisestuhl ferner eine
verstärkende Querstange umfasst, die zwischen den beiden Verbindungsblöcken in der
gleichen Höhe auf den Vorderbeinen oder den Hinterbeinen angeordnet ist.
6. Zusammenklappbarer Speisestuhl nach Anspruch 1, wobei die beiden Enden der Verbindungswelle
ferner jeweils eine Außenkappe umfassen, die aus einem Außenkappenkopf und einem Befestigungsblock
besteht, wobei der Befestigungsblock an einem äußeren Ende der Verbindungswelle fest
angeschlossen ist und die Hülse an einer äußersten Stelle begrenzt, und der Außenkappenkopf
mit der Fußstützenhebelhülse festgeklemmt ist.
7. Zusammenklappbarer Speisestuhl nach Anspruch 1, wobei die Vorderbeinhülse, die Hinterbeinhülse,
die Fußstützenhebelhülse und die Rückenlehnenrahmenhülse den gleichen oder einen sich
allmählich ändernden Außendurchmesser aufweisen.
8. Zusammenklappbarer Speisestuhl nach Anspruch 1, wobei die Rückenlehne aus einem Rückenlehnenrahmen
und einem Gewebe besteht, wobei das Gewebe zwischen dem Rückenlehnenrahmen und dem
Sitzbrett angeordnet ist und einen Umfang aufweist, der mit dem Rückenlehnenrahmen
bzw. der Sitzbrett fest verbunden ist.
9. Zusammenklappbarer Speisestuhl nach Anspruch 1, wobei der Fußstützenhebel außerdem
mit einer rutschfesten Fußstütze versehen ist, die aus einem hochmolekularen Material
hergestellt ist.
10. Zusammenklappbarer Speisestuhl nach Anspruch 1, wobei das Essbrett außerdem mit einer
L-förmigen Hängestange versehen ist, von der ein Ende drehbar an einem Umfang des
Essbretts angebracht ist und die mit dem Essbrett einstückig ausgebildet ist, wenn
zusammengeklappt.
1. Chaise haute pliable, comprenant une partie chaise (1), un arbre de liaison (2), un
levier de repose-pieds (3) et des pieds de chaise télescopiques (4) ;
la partie chaise et les pieds de chaise étant reliés avec l'arbre de liaison ;
la partie chaise étant située à une partie supérieure de la chaise haute, et comprenant
une plaque de siège (11), un dossier (12) et un plateau (13), et le dossier comprenant
un cadre de dossier (15) ; et
quatre pieds de chaise précités étant prévus, et les pieds de chaise étant disposés
de manière séparée près de deux extrémités de l'arbre de liaison et respectivement
vers l'avant et vers l'arrière pour former une paire de pieds avant et une paire de
pieds arrière ;
les pieds avant, les pieds arrière, le cadre de dossier et le levier de repose-pieds
étant montés de manière rotative sur l'arbre de liaison par une bague de pied avant
(51), une bague de pied arrière (52), une bague de cadre de dossier (53) et une bague
de levier de repose-pieds (54), respectivement ;
chacune parmi la bague de pied avant, la bague de pied arrière, la bague de cadre
de dossier et la bague de levier de repose-pieds étant constituée par un corps de
bague et un raccord relié de manière fixe au corps de bague, le corps de bague ayant
une structure annulaire creuse, un mécanisme de liaison étant disposé sur une paroi
interne du corps de bague, et le mécanisme de liaison comprenant plusieurs évidements
et deux blocs de limitation (57) ; et
les évidements étant disposés de manière espacée selon une direction circonférentielle
de la paroi interne du corps de bague, et les blocs de limitation étant disposés à
l'extérieur des deux évidements au niveau des extrémités les plus à l'extérieur ;
l'arbre de liaison comportant également un dispositif de verrouillage (6) qui comprend
un bloc de verrouillage (61), un ressort de rappel (62), un bloc mobile (63) et une
poignée (64), le bloc de verrouillage étant disposé sur l'arbre de liaison de manière
à se déplacer uniquement selon une direction axiale de l'arbre de liaison, plusieurs
bossages (611) correspondant aux évidements de chacune des bagues faisant saillie
sur le bloc de verrouillage, un plot de liaison (612) correspondant au bloc mobile
étant disposé à une extrémité du bloc de verrouillage, et deux extrémités du ressort
de rappel étant respectivement reliées au bloc de verrouillage et à l'arbre de liaison
ou en butée contre ceux-ci ; le bloc mobile comportant une fente de coulissement (631),
une fente d'orientation (632) et un trou de liaison (633),
la fente de coulissement étant ménagée respectivement de manière oblique à deux extrémités
du bloc mobile et correspondant au plot de liaison du bloc de verrouillage, et la
fente d'orientation étant une fente de coulissement en forme de bande et étant ménagée
selon une direction de mouvement du bloc mobile ; et la poignée comportant un trou
de vis de fixation (641) correspondant au trou de liaison sur le bloc mobile, une
vis de fixation passant à travers le trou de vis de fixation, puis étant reliée dans
le trou de liaison, et l'arbre de liaison comportant un trou en forme de bande dans
une position correspondant au trou de vis de fixation ; et
la bague de pied avant, la bague de pied arrière, la bague de cadre de dossier et
la bague de levier de repose-pieds étant enfilées à proximité étroite les unes des
autres sur l'arbre de liaison dans n'importe quel ordre ; et
après que chacune des bagues est enfilée sur l'arbre de liaison, les blocs de limitation
formant également plusieurs fentes coulissantes en communication respective avec tous
les évidements de la même bague sur un côté dans une direction de mouvement des bossages,
la taille des fentes coulissantes correspondant à celle des bossages, et les blocs
de limitation s'étendant également dans les fentes coulissantes.
2. Chaise haute pliable selon la revendication 1, dans laquelle le dispositif de verrouillage
comprend en outre un mécanisme à deux verrous qui est constitué par un bloc de sécurité,
un ressort de rappel et une baïonnette, le bloc de sécurité comportant un mandrin
et étant disposé sur la poignée par le ressort de rappel, et la baïonnette étant disposée
sur l'arbre de liaison et correspondant au mandrin.
3. Chaise haute pliable selon la revendication 1, dans laquelle les bossages individuels
sur le bloc de verrouillage sont disposés en un agencement linéaire selon une direction
axiale de l'arbre de liaison.
4. Chaise haute pliable selon la revendication 1, dans laquelle les pieds de chaise sont
constitués par plusieurs sous-tiges et blocs de liaison, le bloc de liaison étant
constitué par une interface supérieure, une interface inférieure et un bloc de réglage,
l'interface supérieure et l'interface inférieure étant respectivement destinées à
relier deux sous-tiges adjacentes, le bloc de réglage étant disposé sur l'interface
supérieure ou l'interface inférieure par une tige de rotation et un ressort de torsion,
et le bloc de réglage et la sous-tige reliée à l'interface inférieure ou l'interface
supérieure comportant, de manière correspondante, un trou traversant et un goujon,
respectivement.
5. Chaise haute pliable selon la revendication 4, la chaise haute comprenant en outre
une barre transversale de renforcement qui est disposée entre deux blocs de liaison
de la même hauteur sur les pieds avant ou les pieds arrière.
6. Chaise haute pliable selon la revendication 1, dans laquelle les deux extrémités de
l'arbre de liaison comprennent en outre, respectivement, un capuchon externe qui est
constitué par une tête de capuchon externe et un bloc de fixation, le bloc de fixation
étant relié de manière fixe au niveau d'une extrémité externe de l'arbre de liaison
et limitant la bague sur le côté le plus à l'extérieur, et la tête de capuchon externe
étant serrée avec la bague de levier de repose-pieds.
7. Chaise haute pliable selon la revendication 1, dans laquelle la bague de pied avant,
la bague de pied arrière, la bague de levier de repose-pieds et la bague de cadre
de dossier ont le même diamètre externe ou un diamètre externe changeant progressivement.
8. Chaise haute pliable selon la revendication 1, dans laquelle le dossier est constitué
par un cadre de dossier et une toile, la toile étant disposée entre le cadre de dossier
et la plaque de siège, et ayant une périphérie reliée de manière fixe au cadre de
dossier et à la plaque de siège, respectivement.
9. Chaise haute pliable selon la revendication 1, dans laquelle le levier de repose-pieds
comporte également un repose-pieds antidérapant qui est fait d'un matériau à haut
poids moléculaire.
10. Chaise haute pliable selon la revendication 1, dans laquelle le plateau comporte également
une tige de suspension en forme de L, dont une extrémité est articulée au niveau d'une
périphérie du plateau, et qui est formée d'un seul tenant avec le plateau une fois
plié.