Folding chair

Abstract

 Embodiments of the present application provide a folding chair, wherein a first waist-rest portion (123) and a second waist-rest portion (124) are additionally provided, and when the folding chair is unfolded, both of the waist-rest portions (123, 124) can fit a waist curve. In using, the folding chair is unfolded, and under the action of the first waist-rest portion (123) and the second waist-rest portion (124), a protruded portion is formed on the oxford cloth to properly support the waist of a user, so as to prevent the waist from concaving downward to a certain degree, thereby realizing the object of making the user feel more comfortable.

Description

FIELD OF THE INVENTION

[0001] The present application relates to a chair, and particularly relates to a folding chair.

BACKGROUND OF THE INVENTION

[0002] Folding chair is a portable and foldable chair, which is convenient to move and saves space. A common folding chair mainly consists of thickened steel tubes and oxford cloth. The surfaces of the steel tubes are treated through plastic spraying, thus are anti-rust and artistic, and critical parts of the steel tubes that are subjected to force are dealt with mechanical treatment, such that the bearing capability is greatly improved. Specifications of the oxford cloth mainly include 600D or 800D. Most of folding chairs have a double-layer cloth structure to improve service life and comfortableness of the chair seat. Folding and connecting parts are connected by galvanized rivets and virgin plastic members. According to characteristics of different products, a string bag for cup, an operating panel, a storage bag, a foot rest, a sunshade and other designs can be additionally provided. The service life of the above folding chair is as long as a chair seat made by plastic injection, and the above folding chair is more convenient to carry, thus is a kind of folding chair frequently used indoors and outdoors.

[0003] As shown in Figure 1, a folding chair includes two backrest tubes, three sets of intersecting tubes, two armrest tubes, four lower brackets, two armrest brackets and two through-hole brackets. Specifically, a through-hole bracket 011 is sleeved on a backrest tube 001, a through-hole bracket 012 is sleeved on a backrest tube 002, a lower bracket 013 is fixed at a bottom end of the backrest tube 001, and a lower bracket 014 is fixed at a bottom end of the backrest tube 002. An armrest tube 009 is articulated to an armrest tube 010, a bottom end of the armrest tube 009 is articulated to a lower bracket 016 and the armrest tube 009 is cooperated with an armrest bracket 017, and a bottom end of the armrest tube 010 is articulated to a lower bracket 015 and the armrest tube 010 is cooperated with an armrest bracket 018. A first set of intersecting tubes include an upper intersecting tube 003 and a lower intersecting tube 004 which are articulated, two ends of the upper intersecting tube 003 are respectively articulated to the through-hole bracket 011 and the lower bracket 014, and two ends of the lower intersecting tube 004 are respectively articulated to the through-hole bracket 012 and the lower bracket 013. A second set of intersecting tubes include an upper intersecting tube 005 and a lower intersecting tube 006 which are articulated, two ends of the lower intersecting tube 006 are respectively articulated to the armrest bracket 017 and the lower bracket 013, and two ends of the upper intersecting tube 005 are respectively articulated to the through-hole bracket 011 and the lower bracket 015. A third set of intersecting tubes include an upper intersecting tube 007 and a lower intersecting tube 008 which are articulated, two ends of the lower intersecting tube 008 are respectively articulated to the armrest bracket 018 and the lower bracket 014, and two ends of the upper intersecting tube 007 are respectively articulated to the through-hole bracket 012 and the lower bracket 016.

[0004] When unfolding the folding chair, the oxford cloth is covered on the backrest tube 001, the backrest tube 002, the armrest tube 009 and the armrest tube 010, and then the upper intersecting tube 003, the lower intersecting tube 004, the armrest tube 010 and the armrest tube 009 are unfolded, and finally, the upper intersecting tube 007, the lower intersecting tube 008, the upper intersecting tube 005 and the lower intersecting tube 006 are unfolded, and at this time the folding chair can be used. When folding the folding chair, the folding chair can be folded by lifting the armrest tube 010 and the armrest tube 009 inward. In order to facilitate the folding process, the above backrest tubes of the folding chair are straight tubes, thus when a user is sitting on the folding chair, the waist of the user is not supported, and when sitting on the folding chair for a long time, the waist of the user is apt to concave downward which may cause pain in the waist of the user.

[0005] Therefore, a technical problem desired to be solved by the person skilled in the art is to provide a folding chair which can make the user feel more comfortable.

SUMMARY OF THE INVENTION

[0006] In view of this, the present application provides a folding chair to realize an object of making the user feel more comfortable.

[0007] For achieving the above object, the present application provides a technical solution as follows.

[0008] A folding chair, including:

[0009] a first backrest tube, on which a first through-hole bracket is sleeved;

[0010] a second backrest tube, on which a second through-hole bracket is sleeved;

[0011] a first connecting component connecting the first backrest tube and the second backrest tube;

[0012] a first intersecting tube connecting a first upper bracket and the first backrest tube;

[0013] a second intersecting tube connecting a second upper bracket and the second backrest tube;

[0014] a second connecting component connecting the first upper bracket and the second upper bracket; and

[0015] an oxford cloth covered on the first backrest tube, the second backrest tube and the second connecting component;

[0016] wherein the folding chair further includes a first waist-rest portion and a second waist-rest portion which are symmetrically arranged, and are located between the first backrest tube and the second backrest tube to fit a waist curve when the folding chair is unfolded.

[0017] Preferably, in the above folding chair, the first intersecting tube includes a first upper intersecting tube and a first lower intersecting tube which are articulated at middle portions thereof, the first upper intersecting tube includes a top end articulated to the first through-hole bracket, and the first lower intersecting tube includes a top end provided with the first upper bracket, and a bottom end articulated to the first backrest tube; and

[0018] the second intersecting tube includes a second upper intersecting tube and a second lower intersecting tube which are articulated at middle portions thereof, the second upper intersecting tube includes a top end articulated to the second through-hole bracket, and the second lower intersecting tube includes a top end provided with the second upper bracket, and a bottom end articulated to the second backrest tube.

[0019] Preferably, in the above folding chair,

[0020] the bottom end of the first lower intersecting tube is articulated to the first backrest tube via a first lower bracket;

[0021] a second lower bracket is fixed at a bottom end of the first upper intersecting tube;

[0022] the bottom end of the second lower intersecting tube is articulated to the second backrest tube via a third lower bracket; and

[0023] a fourth lower bracket is fixed at a bottom end of the second upper intersecting tube.

[0024] Preferably, in the above folding chair, the first connecting component includes a first upper connecting tube and a first lower connecting tube which are articulated at middle portions thereof, the first upper connecting tube includes a top end articulated to the first through-hole bracket and a bottom end articulated to the second lower bracket, and the first lower connecting tube includes a top end articulated to the second through-hole bracket and a bottom end articulated to the first lower bracket; and

[0025] the second connecting component includes a second upper connecting tube and a second lower connecting tube which are articulated at middle portions thereof, the second upper connecting tube includes a top end articulated to the first upper bracket and a bottom end articulated to the fourth lower bracket, and the second lower connecting tube includes a top end articulated to the second upper bracket and a bottom end articulated to the third lower bracket.

[0026] Preferably, in the above folding chair, the top end of the second upper connecting tube is extended to form a first armrest portion, and the top end of the second lower connecting tube is extended to form a second armrest portion.

[0027] Preferably, in the above folding chair, the first waist-rest portion is an arc-shaped protrusion of a first waist-rest tube, the first waist-rest tube includes a bottom end articulated to a first sliding block and a middle portion articulated to an end, close to the first through-hole bracket, of the first upper connecting tube, and the first sliding block is sleeved on an end, close to the first lower bracket, of the first lower connecting tube; and

[0028] the second waist-rest portion is an arc-shaped protrusion of a second waist-rest tube, the second waist-rest tube includes a bottom end articulated to a second sliding block and a middle portion articulated to an end, close to the second through-hole bracket, of the first lower connecting tube, and the second sliding block is sleeved on an end, close to the second lower bracket, of the first upper connecting tube.

[0029] Preferably, in the above folding chair, the first waist-rest portion is an arc-shaped protrusion of a first waist-rest tube, the first waist-rest tube includes a bottom end articulated to a first sliding block and a middle portion articulated to an end, close to the first through-hole bracket, of the first upper intersecting tube, and the first sliding block is sleeved on an end, close to the first lower bracket, of the first lower intersecting tube; and

[0030] the second waist-rest portion is an arc-shaped protrusion of a second waist-rest tube, the second waist-rest tube includes a bottom end articulated to a second sliding block and a middle portion articulated to an end, close to the second through-hole bracket, of the second upper intersecting tube, and the second sliding block is sleeved on an end, close to the second lower bracket, of the second lower intersecting tube.

[0031] Preferably, in the above folding chair, the first waist-rest portion is an arc-shaped protrusion of a first waist-rest tube, the first waist-rest tube includes a bottom end articulated to a first sliding block and a middle portion articulated to an end, close to the first through-hole bracket, of the first upper intersecting tube, and the first sliding block is sleeved on the first backrest tube; and

[0032] the second waist-rest portion is an arc-shaped protrusion of a second waist-rest tube, the second waist-rest tube includes a bottom end articulated to a second sliding block and a middle portion articulated to an end, close to the second through-hole bracket, of the second upper intersecting tube, and the second sliding block is sleeved on the second backrest tube.

[0033] Preferably, in the above folding chair, the first waist-rest portion includes a first woven strip and a first steel sheet, the first steel sheet is bent at a preset angle by the first woven strip, and the first waist-rest portion is fixed at a part, corresponding to a backrest of the folding chair, of the oxford cloth; and

[0034] the second waist-rest portion includes a second woven strip and a second steel sheet, the second steel sheet is bent at a preset angle by the second woven strip, and the second waist-rest portion is fixed at a part, corresponding to the backrest of the folding chair, of the oxford cloth.

[0035] Preferably, in the above folding chair, the first waist-rest portion is a steel sheet having a certain curvature and is fixed at a part, corresponding to a backrest of the folding chair, of the oxford cloth; and

[0036] the second waist-rest portion is a steel sheet having a certain curvature, and is fixed at a part, corresponding to the backrest of the folding chair, of the oxford cloth.

[0037] From the above technical solution, it can be seen that, in the folding chair according to the embodiments of the present application, a first waist-rest portion and a second waist-rest portion are additionally provided and can fit a waist curve. In using, the folding chair is unfolded, and under the action of the first waist-rest portion and the second waist-rest portion, a protruded portion is formed on the oxford cloth to properly support the waist of a user, so as to prevent the waist from concaving downward to a certain degree, thereby realizing the object of making the user feel more comfortable.

BRIEF DESCRIPTION OF THE DRAWINGS

[0038] For more clearly illustrating embodiments of the present application or the technical solution in the prior art, drawings referred to describe the embodiments or the prior art will be briefly described hereinafter. Apparently, the drawings in the following description are only several embodiments of the present application, and for the person skilled in the art other drawings may be obtained based on these drawings without any creative efforts.

[0039] Figure 1 is a perspective schematic view showing the structure of a folding chair in the prior art;

[0040] Figure 2 is an exploded schematic view of a folding chair according to a first embodiment of the present application;

[0041] Figure 3 is a perspective schematic view showing the structure of the folding chair according to the first embodiment of the present application;

[0042] Figure 4 is a side schematic view showing the structure of the folding chair according to the first embodiment of the present application;

[0043] Figures 5 and 6 are schematic views showing the folding process of the folding chair according to the first embodiment of the present application;

[0044] Figure 7 is an exploded schematic view of a folding chair according to a second embodiment of the present application;

[0045] Figure 8 is a perspective schematic view showing the structure of the folding chair according to the second embodiment of the present application;

[0046] Figure 9 is a side schematic view showing the structure of the folding chair according to the second embodiment of the present application;

[0047] Figures 10 and 11 are schematic views showing the folding process of the folding chair according to the second embodiment of the present application;

[0048] Figure 12 is an exploded schematic view of a folding chair according to a third embodiment of the present application;

[0049] Figure 13 is a perspective schematic view showing the structure of the folding chair according to the third embodiment of the present application;

[0050] Figure 14 is a side schematic view showing the structure of the folding chair according to the third embodiment of the present application;

[0051] Figures 15 and 16 are schematic views showing the folding process of the folding chair according to the third embodiment of the present application;

[0052] Figure 17 is an exploded schematic view of a folding chair according to a fourth embodiment of the present application;

[0053] Figure 18 is a perspective schematic view showing the structure of the folding chair according to the fourth embodiment of the present application;

[0054] Figure 19 is a side schematic view showing the structure of the folding chair according to the fourth embodiment of the present application; and

[0055] Figures 20 to 21 are schematic views showing the folding process of the folding chair according to the fourth embodiment of the present application.

[0056] Reference Numerals in Figures 1 to 21:

001	a backrest tube;	002	a backrest tube;
003	an upper intersecting tube;	004	a lower intersecting tube;
005	an upper intersecting tube;	006	a lower intersecting tube;
007	an upper intersecting tube;	008	a lower intersecting tube;
009	an armrest tube;	010	an armrest tube;
011	a through-hole bracket;	012	a through-hole bracket;
013	a lower bracket;	014	a lower bracket;
015	a lower bracket;	016	a lower bracket;
017	an armrest bracket;	018	an armrest bracket;
101	a first backrest tube;	102	a second backrest tube;
103	a first upper connecting tube;	104	a first lower connecting tube;
105	a first upper intersecting tube;	106	a first lower intersecting tube;
107	a second upper intersecting tube;	108	a second lower intersecting tube;
109	a second upper connecting tube;	110	a second lower connecting tube;
111	a first through-hole bracket;	112	a second through-hole bracket;
113	a first lower bracket;	114	a second bracket;
115	a third lower bracket;	116	a fourth lower bracket;
117	a first upper bracket;	118	a second upper bracket;
119	a first backrest tube;	120	a second backrest tube;
121	a first sliding block;	122	a second sliding block;
123	a first waist-rest portion; and	124	a second waist-rest portion.

DETAILED DESCRIPTION OF THE INVENTION

[0057] Hereinafter, the embodiments will be described in conjunction with the drawings. In addition, the embodiments described below are not intended to limit the content of the present application recorded by claims. Furthermore, the entire content described and constituted by the following embodiments is not limited to necessary contents for the solution of the present application recorded by claims.

[0058] The present application discloses a folding chair, wherein two waist-rest portions are provided, such that when the folding chair is unfolded, the waist-rest portions can fit a physiological curve of the waist of a human body so as to support the waist, thereby making the user feel more comfortable.

[0059] As shown in Figures 2 to 11, the folding chair includes a first backrest tube 101, on which a first through-hole bracket 111 is sleeved; a second backrest tube 102, on which a second through-hole bracket 112 is sleeved; a first connecting component connecting the first backrest tube 101 and the second backrest tube 102; a first intersecting tube connecting a first upper bracket 117 and the first backrest tube 101; a second intersecting tube connecting a second upper bracket 118 and the second backrest tube 102; a second connecting component connecting the first upper bracket 117 and the second upper bracket 118; and an oxford cloth covered on the first backrest tube 101, the second backrest tube 102 and the second connecting component. The folding chair further includes a first waist-rest portion and a second waist-rest portion which are symmetrically arranged and are located between the first backrest tube 101 and the second backrest tube 102 when the folding chair is unfolded so as to fit a waist curve.

[0060] When the folding chair is unfolded, the oxford cloth is completely spread, and the oxford cloth supported by the first backrest tube and the second backrest tube forms a backrest of the folding chair, and the oxford cloth supported by the first intersecting tube, the second intersecting tube and the second connecting component forms a chair seat of the folding chair.

[0061] The folding chair according to the embodiments of the present application is additionally provided with the first waist-rest portion and the second waist-rest portion, and these two waist-rest portions can fit the waist curve. In using, when the folding chair is unfolded, a protruding portion is formed on the oxford cloth under the action of the first waist-rest portion and the second waist-rest portion, and the protruding portion can properly support the waist of the user, so as to prevent the waist from concaving downward to a certain degree, thereby realizing the object of making the user feel more comfortable.

[0062] In the embodiments of the present application, the first connecting component and the second connecting component can be rigid connecting components, such as a connecting tube. Two ends of the connecting tube are respectively fixed to the first backrest tube 101 and the second backrest tube 102, and at this time, the first backrest tube 101 and the second backrest tube 102 can not perform a folding action, and only the first intersecting tube and the second intersecting tube can perform the folding action. Furthermore, the first connecting component and the second connecting component can be components that can be unfolded and folded, such as connecting sheets with ends thereof being overlapped and articulated. Specifically, one of the connecting sheets is articulated to the first backrest tube 101, and the other connecting sheet is articulated to the second backrest tube 102. And, an elastic component having a clamping function is provided at articulated parts of the connecting sheets, and when it is required to fold the first connecting sheet and the second connecting sheet, the elastic component is pulled outward, then the first connecting sheet and the second connecting sheet can be folded.

[0063] The first intersecting tube and the second intersecting tube in the embodiments of the present application may have a structure similar to the intersecting tube in the background art, and the shape of the intersecting tube can be changed according to a specific application situation. For example, one of the intersecting tubes can be designed to have an arc-shaped structure for functioning as an armrest. Preferably, the embodiment of the present application adopts the structure in the background art, and specifically the first intersecting tube includes a first upper intersecting tube 105 and a first lower intersecting tube 106 which are articulated at middle parts thereof. A top end of the first upper intersecting tube 105 is articulated to the first through-hole bracket 111, a top end of the first lower intersecting tube 106 is provided with the first upper bracket 117, and a bottom end of the first lower intersecting tube 106 is articulated to the first backrest tube 101.

[0064] The second intersecting tube includes a second upper intersecting tube 107 and a second lower intersecting tube 108 which are articulated at middle parts thereof. A top end of the second upper intersecting tube 107 is articulated to the second through-hole bracket 112, a top end of the second lower intersecting tube 108 is provided with a second upper bracket 118, and a bottom end of the second lower intersecting tube 108 is articulated to the second backrest tube 102.

[0065] The bottom ends of the above intersecting tubes and backrest tubes can achieve connections between rod members by their own structure, or achieve connections between rod members by means of brackets. For example, the bottom end of the first lower intersecting tube 106 is articulated to the first backrest tube 101 via a first lower bracket 113, a bottom end of the first upper intersecting tube 105 is fixedly provided with a third lower bracket 115, a bottom end of the second lower intersecting tube 108 is articulated to the second backrest tube 102 via a second lower bracket 114, and a bottom end of the second upper intersecting tube 107 is fixedly provided with a fourth lower bracket 116.

[0066] When the first intersecting tube is connected to the second intersecting tube via the above brackets, the first connecting component includes a first upper connecting tube 103 and a first lower connecting tube 104 which are articulated at middle parts thereof. And, a top end of the first upper connecting tube 103 is articulated to the first through-hole bracket 111, a bottom end of the first upper connecting tube 103 is articulated to the second lower bracket 114, a top end of the first lower connecting tube 104 is articulated to the second through-hole bracket 112, and a bottom end of the first lower connecting tube 104 is articulated to the first lower bracket 113.

[0067] The second connecting component includes a second upper connecting tube 109 and a second lower connecting tube 110 which are articulated at middle parts thereof. And, a top end of the second upper connecting tube 109 is articulated to the first upper bracket 117, a bottom end of the second upper connecting tube 109 is articulated to the fourth lower bracket 116, a top end of the second lower connecting tube 110 is articulated to the second upper bracket 118, and a bottom end of the second lower connecting tube 110 is articulated to the third lower bracket 115.

[0068] The above brackets can have the same structure or different structures. Preferably, in the embodiment of the present application, the above brackets are made to have the same structure to improve universality of the brackets, such that when one of the brackets is broken, the broken bracket can be replaced at any moment. A main body of each of the brackets is provided with a mounting hole for accommodating the first backrest tube 101, and an articulating portion to be articulated with the tube members. Each bracket has two articulating portions, the two articulating portions are arranged at 90 degree angle to each another, and the articulating portion has a through hole for accommodating a rivet. Taking the first lower bracket 113 mounted at the bottom portion of the first backrest tube 101 as an example, the first backrest tube 101 is fixed in the mounting hole of the first lower bracket 113, the first lower intersecting tube 106 is articulated to a first articulating portion of the first lower bracket 113, and the first lower connecting tube 104 is articulated to a second articulating portion of the first lower bracket 113. Taking the fourth lower bracket 116 as an example, since it is not required to mount a backrest tube in the fourth lower bracket 116, the corresponding mounting hole is idle, a first articulating portion of the fourth lower bracket 116 is articulated to the bottom end of the second upper connecting tube 109, and a second articulating portion of the fourth lower bracket 116 is articulated to the bottom end of the second upper intersecting tube 107.

[0069] In the second connecting component having the above structure, the top end of the second upper connecting tube 109 is extended to form a first armrest portion, and the top end of the second lower connecting tube 110 is extended to form a second armrest portion.

[0070] In addition to the articulating portions to be articulated with the intersecting tubes, both of the first upper bracket 117 and the second upper bracket 118 further has a groove for supporting the second upper connecting tube or the second lower connecting tube accordingly.

[0071] The embodiments of the present application further disclose various structures and specific mounting manners of the first waist-rest portion and the second waist-rest portion.

[0072] In the folding chair as shown in Figures 2 to 6, the first waist-rest portion is an arc-shaped protrusion of a first waist-rest tube 119. Specifically, a bottom end of the first waist-rest tube 119 is articulated to a first sliding block 121, a middle portion of the first waist-rest tube 119 is articulated to an end, close to the first through-hole bracket 111, of the first upper intersecting tube 105, and the first sliding block 121 is sleeved on an end, close to the first lower bracket 113, of the first lower intersecting tube 106.

[0073] The second waist-rest portion is an arc-shaped protrusion of a second waist-rest tube 120. Specifically, a bottom end of the second waist-rest tube 120 is articulated to a second sliding block 122, a middle portion of the second waist-rest tube 120 is articulated to an end, close to the second through-hole bracket 112, of the second upper intersecting tube 107, and the second sliding block 122 is sleeved on an end, close to the second lower bracket 114, of the second lower intersecting tube 108.

[0074] In using, the first backrest tube 101, the second backrest tube 102, the second upper connecting tube 109 and the second lower connecting tube 110 are moved outward so as to unfold the folding chair. As shown in Figure 4, under the action of the arc-shaped protrusions on the first waist-rest tube 119 and the second waist-rest tube 120, a protruding portion is formed on the oxford cloth to properly support the waist of the user, so as to prevent the waist from concaving downward to a certain degree, thereby realizing the object of making the user feel more comfortable. During folding, as shown in Figures 5 and 6, the folding process can be achieved in only one step by pulling the second upper intersecting tube 107 and the second lower intersecting tube 108 inward.

[0075] In the folding chair as shown in Figures 7 to 11, the first waist-rest portion is an arc-shaped protrusion of a first waist-rest tube 119. Specifically, a bottom end of the first waist-rest tube 119 is articulated to a first sliding block 121, a middle portion of the first waist-rest tube 119 is articulated to an end, close to the first through-hole bracket 111, of the first upper connecting tube 103, and the first sliding block 121 is sleeved on an end, close to the first lower bracket 113, of the first lower connecting tube 104.

[0076] The second waist-rest portion is an arc-shaped protrusion of a second waist-rest tube 120. Specifically, a bottom end of the second waist-rest tube 120 is articulated to a second sliding block 122, a middle portion of the second waist-rest tube 120 is articulated to an end, close to the second through-hole bracket 112, of the first lower connecting tube 104, and the second block 122 is sleeved on an end, close to the second lower bracket 114, of the first upper connecting tube 103.

[0077] In using, the first backrest tube 101, the second backrest tube 102, the second upper connecting tube 109 and the second lower connecting tube 110 are moved outward so as to unfold the folding chair. As shown in Figure 9, under the action of the arc-shaped protrusions on the first waist-rest tube 119 and the second waist-rest tube 120, a protruding portion is formed on the oxford cloth to properly support the waist of the user, so as to prevent the waist from concaving downward to a certain degree, thereby realizing the object of making the user feel more comfortable. During folding, as shown in Figures 10 and 11, the folding process can be achieved in only one step by pulling the second upper intersecting tube 107 and the second lower intersecting tube 108 inward.

[0078] In addition, the embodiments of the present application further provide a folding chair. In the folding chair, the first waist-rest portion is an arc-shaped protrusion of a first waist-rest tube 119. Specifically, a bottom end of the first waist-rest tube 119 is articulated to a first sliding block 121, a middle portion of the first waist-rest tube 119 is articulated to an end, close to a first through-hole bracket 111, of the first upper intersecting tube 105, and the first sliding block 121 is sleeved on the first backrest tube 101.

[0079] The second waist-rest portion is an arc-shaped protrusion of a second waist-rest tube 120. Specifically, a bottom end of the second waist-rest tube 120 is articulated to a second sliding block 122, a middle portion of the second waist-rest tube 120 is articulated to an end, close to the second through-hole bracket 112, of the second upper intersecting tube 107, and the second sliding block 122 is sleeved on the second backrest tube 102.

[0080] In using, the first backrest tube 101, the second backrest tube 102, the second upper connecting tube 109 and the second lower connecting tube 110 are moved outward so as to unfold the folding chair. Under the action of the arc-shaped protrusions on the first waist-rest tube 119 and the second waist-rest tube 120, a protruding portion is formed on the oxford cloth to properly support the waist of the user, so as to prevent the waist from concaving downward to a certain degree, thereby realizing the object of making the user feel more comfortable. During folding, the folding process can be achieved in only one step by pulling the second upper intersecting tube 107 and the second lower intersecting tube 108 inward.

[0081] In the above various embodiments, the first sliding block 121 and the second sliding block 122 each include a cylindrical portion and a U-shaped connecting member. The cylindrical portion is used to be sleeved on the corresponding rod member. The U-shaped connecting member is used to be articulated with the waist-rest tube.

[0082] The first waist-rest tube 119 and the second waist-rest tube 120 are arranged at different locations and are bent in different ways. When the first waist-rest tube 119 and the second waist-rest tube 120 are mounted on the first intersecting tube and the second intersecting tube respectively, the folding chair has a relatively smaller packaging volume.

[0083] In the folding chair as shown in Figures 12 to 16, the first waist-rest portion 123 includes a first woven strip and a first steel sheet, the first steel sheet is bent at a preset angle by the first woven strip, and the first waist-rest portion 123 is fixed to a part, corresponding to the backrest of the folding chair, of the oxford cloth. The second waist-rest portion 124 includes a second woven strip and a second steel sheet, the second steel sheet is bent at a preset angle by the second woven strip, and the second waist-rest portion 124 is fixed to a part, corresponding to the backrest of the folding chair, of the oxford cloth.

[0084] In using, the first backrest tube 101, the second backrest tube 102, the second upper connecting tube 109 and the second lower connecting tube 110 are moved outward so as to unfold the folding chair. Under the action of the first waist-rest tube 123 and the second waist-rest tube 124, a protruding portion is formed on the oxford cloth to properly support the waist of the user, so as to prevent the waist from concaving downward to a certain degree, thereby realizing the object of making the user feel more comfortable. During folding, the folding process can be achieved in only one step by pulling the second upper intersecting tube 107 and the second lower intersecting tube 108 inward.

[0085] In the folding chair as shown in Figures 17 to 21, the first waist-rest portion 123 is a steel sheet having a certain curvature, and is fixed to a part, corresponding to the backrest of the folding chair, of the oxford cloth; the second waist-rest portion 124 is a steel sheet having a certain curvature, and is fixed to a part, corresponding to the backrest of the folding chair, of the oxford cloth.

[0086] In using, the first backrest tube 101, the second backrest tube 102, the second upper connecting tube 109 and the second lower connecting tube 110 are moved outward so as to unfold the folding chair. Under the action of the first waist-rest tube 123 and the second waist-rest tube 124, a protruding portion is formed on the oxford cloth to properly support the waist of the user, so as to prevent the waist from concaving downward to a certain degree, thereby realizing the object of making the user feel more comfortable. During folding, the folding process can be achieved in only one step by pulling the second upper intersecting tube 107 and the second lower intersecting tube 108 inward.

[0087] Based on the above description of the disclosed embodiments, the person skilled in the art is capable of carrying out or using the present application. It is obvious for the person skilled in the art to make many modifications to these embodiments. The general principle defined herein may be applied to other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments illustrated herein, but should be defined by the broadest scope consistent with the principle and novel features disclosed herein.

Claims

1. A folding chair, comprising:

a first backrest tube, on which a first through-hole bracket is sleeved;

a second backrest tube, on which a second through-hole bracket is sleeved;

a first connecting component connecting the first backrest tube and the second backrest tube;

a first intersecting tube connecting a first upper bracket and the first backrest tube;

a second intersecting tube connecting a second upper bracket and the second backrest tube;

a second connecting component connecting the first upper bracket and the second upper bracket; and

an oxford cloth covered on the first backrest tube, the second backrest tube and the second connecting component;

wherein the folding chair further comprises a first waist-rest portion and a second waist-rest portion which are symmetrically arranged and are located between the first backrest tube and the second backrest tube to fit a waist curve when the folding chair is unfolded.

2. The folding chair according to claim 1, wherein
the first intersecting tube comprises a first upper intersecting tube and a first lower intersecting tube which are articulated at middle portions thereof, the first upper intersecting tube comprises a top end articulated to the first through-hole bracket, and the first lower intersecting tube comprises a top end provided with the first upper bracket, and a bottom end articulated to the first backrest tube; and
the second intersecting tube comprises a second upper intersecting tube and a second lower intersecting tube which are articulated at middle portions thereof, the second upper intersecting tube comprises a top end articulated to the second through-hole bracket, and the second lower intersecting tube comprises a top end provided with the second upper bracket, and a bottom end articulated to the second backrest tube.

3. The folding chair according to claim 2, wherein
the bottom end of the first lower intersecting tube is articulated to the first backrest tube via a first lower bracket;
a second lower bracket is fixed at a bottom end of the first upper intersecting tube;
the bottom end of the second lower intersecting tube is articulated to the second backrest tube via a third lower bracket; and
a fourth lower bracket is fixed at a bottom end of the second upper intersecting tube.

4. The folding chair according to claim 3, wherein
the first connecting component comprises a first upper connecting tube and a first lower connecting tube which are articulated at middle portions thereof, the first upper connecting tube comprises a top end articulated to the first through-hole bracket and a bottom end articulated to the second lower bracket, and the first lower connecting tube comprises a top end articulated to the second through-hole bracket and a bottom end articulated to the first lower bracket; and
the second connecting component comprises a second upper connecting tube and a second lower connecting tube which are articulated at middle portions thereof, the second upper connecting tube comprises a top end articulated to the first upper bracket and a bottom end articulated to the fourth lower bracket, and the second lower connecting tube comprises a top end articulated to the second upper bracket and a bottom end articulated to the third lower bracket.

5. The folding chair according to claim 4, wherein the top end of the second upper connecting tube is extended to form a first armrest portion and the top end of the second lower connecting tube is extended to form a second armrest portion.

6. The folding chair according to claim 5, wherein
the first waist-rest portion is an arc-shaped protrusion of a first waist-rest tube, the first waist-rest tube comprises a bottom end articulated to a first sliding block and a middle portion articulated to an end, close to the first through-hole bracket, of the first upper connecting tube, and the first sliding block is sleeved on an end, close to the first lower bracket, of the first lower connecting tube; and
the second waist-rest portion is an arc-shaped protrusion of a second waist-rest tube, the second waist-rest tube comprises a bottom end articulated to a second sliding block and a middle portion articulated to an end, close to the second through-hole bracket, of the first lower connecting tube, and the second sliding block is sleeved on an end, close to the second lower bracket, of the first upper connecting tube.

7. The folding chair according to claim 5, wherein
the first waist-rest portion is an arc-shaped protrusion of a first waist-rest tube, the first waist-rest tube comprises a bottom end articulated to a first sliding block and a middle portion articulated to an end, close to the first through-hole bracket, of the first upper intersecting tube, and the first sliding block is sleeved on an end, close to the first lower bracket, of the first lower intersecting tube; and
the second waist-rest portion is an arc-shaped protrusion of a second waist-rest tube, the second waist-rest tube comprises a bottom end articulated to a second sliding block and a middle portion articulated to an end, close to the second through-hole bracket, of the second upper intersecting tube, and the second sliding block is sleeved on an end, close to the second lower bracket, of the second lower intersecting tube.

8. The folding chair according to claim 5, wherein
the first waist-rest portion is an arc-shaped protrusion of a first waist-rest tube, the first waist-rest tube comprises a bottom end articulated to a first sliding block and a middle portion articulated to an end, close to the first through-hole bracket, of the first upper intersecting tube, and the first sliding block is sleeved on the first backrest tube; and
the second waist-rest portion is an arc-shaped protrusion of a second waist-rest tube, the second waist-rest tube comprises a bottom end articulated to a second sliding block and a middle portion articulated to an end, close to the second through-hole bracket, of the second upper intersecting tube, and the second sliding block is sleeved on the second backrest tube.

9. The folding chair according to claim 5, wherein
the first waist-rest portion comprises a first woven strip and a first steel sheet, the first steel sheet is bent at a preset angle by the first woven strip, and the first waist-rest portion is fixed at a part, corresponding to a backrest of the folding chair, of the oxford cloth; and
the second waist-rest portion comprises a second woven strip and a second steel sheet, the second steel sheet is bent at a preset angle by the second woven strip, and the second waist-rest portion is fixed at a part, corresponding to the backrest of the folding chair, of the oxford cloth.

10. The folding chair according to claim 5, wherein
the first waist-rest portion is a steel sheet having a certain curvature and is fixed at a part, corresponding to a backrest of the folding chair, of the oxford cloth; and
the second waist-rest portion is a steel sheet having a certain curvature, and is fixed at a part, corresponding to the backrest of the folding chair, of the oxford cloth.

Drawing