Connecting structure of chair

Abstract

The utility model discloses a connecting structure of a chair, which comprises a supporting tube, the supporting tube comprises a back tube and a front tube, the front tube and the back tube are connected through an armrest tube and a crosspiece, one end of the armrest tube is connected with the back tube through a first connecting piece, the armrest tube is connected with the front tube through a second connecting piece, and the first connecting piece is connected with the back tube through a first connecting piece; the two ends of the crosspiece are connected with the back pipe and the front pipe through first connecting pieces, and the supporting pipe is used for providing main supporting force. The folding unit is arranged between the front pipe and the back pipe, the folding unit comprises two folding frames, the folding frames intersect and are in pivot connection with each other, and the folding unit is used for providing overall folding.

Description

Technical Field

[0001] The present application relates to the technical field of folding chairs, and in particular to a connection structure of a chair. Background Art

[0002] Folding chairs are popular among people because of their light structure, stackability, and ease of moving and storage.

[0003] For example, a foldable chair proposed in announcement No. CN213550722U can effectively prevent the safety hazard caused by the first frame and the second frame rotating and closing around the first rotating connecting hole under the action of gravity to a certain extent. However, the frame of this structure often adopts an integrated frame, which is easy to bend and difficult to recover when subjected to a large force.

[0004] The above contents are only used to assist in understanding the technical solution of the present application, and do not constitute an admission that the above contents are the closest prior art to the present application. Summary of the invention

[0005] Based on this, the present application provides a connection structure of a chair to solve one of the above-mentioned technical problems.

[0006] The technical solution adopted by the present application to solve its technical problems is to include: a support tube, the support tube includes a back tube and a front tube, the front tube and the back tube are connected through a handrail tube and a cross piece, one end of the handrail tube is connected to the back tube through a first connecting piece, the handrail tube is connected to the front tube through a second connecting piece, both ends of the cross piece are connected to the back tube and the front tube through a first connecting piece, and the support tube is used to provide the main supporting force; a folding unit, which is arranged between the front tube and the back tube, the folding unit includes two folding frames, the folding frames are crossed and pivotally connected to each other, and the folding unit is used to provide overall folding.

[0007] In some embodiments, the folding frame includes a seat tube, two cross tubes, and two connecting plates, one end of the connecting plate is rotatably set on the cross tube, and the other end is rotatably set on the front tube and the back tube. One end of the cross tube is rotatably connected to the front tube and the back tube, and the other end is fixedly set on the seat tube.

[0008] In some embodiments, when the folding unit is fully unfolded, the seat tube abuts against the connecting piece.

[0009] In some embodiments, the handrail tube and the cross bar are hollow inside, at least a portion of the first connecting member is inserted into the handrail tube and the cross bar, and a longitudinally penetrating circular hole is provided in the portion of the first connecting member connecting the handrail tube and the cross bar for installing rivets.

[0010] In some embodiments, one end of the first connecting member away from the circular hole abuts against the front tube and the back tube, and a horizontally penetrating circular hole is provided in the front tube and the back tube for installing a rivet.

[0011] In some embodiments, one end of the second connecting member is inserted into the horizontally arranged handrail tube and a longitudinally penetrating circular hole is opened for installing a rivet, and the other end of the second connecting member is inserted into the longitudinally arranged front tube and a horizontally penetrating circular hole is opened for installing a rivet.

[0012] The beneficial effect of the present application is that the parts will not be easily bent through the connection between the support rods, handrail tubes and cross bars, and the present application adopts a first connecting member and a second connecting member for connection for reinforcement, and additional rivet connections are performed on the connecting members to improve the overall stability and firmness. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 It is a three-dimensional structural schematic diagram of this application.

[0015] Figure 2 It is an exploded schematic diagram of the present application.

[0016] Figure 3 This is a schematic diagram of the first connecting member of the present application.

[0017] Figure 4 It is a schematic diagram of the second connecting member of the present application.

[0018] Explanation of the accompanying drawings: 1. Support tube; 11. Front tube; 12. Back tube; 2. Handrail tube; 3. Cross bar; 4. First connecting member; 5. Second connecting member; 6. Folding unit; 61. Folding frame; 611. Seat tube; 612. Cross tube; 613. Connecting plate; 7. Round hole. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to achieve. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that the combination of such technical solutions does not exist and is not within the scope of protection of this application.

[0020] In the embodiments of this application, please refer to Figure 1-4 As shown, the present application provides a connection structure of a chair, mainly comprising: a support tube 1, wherein the support tube 1 comprises a back tube 12 and a front tube 11, wherein the front tube 11 and the back tube 12 are connected via an armrest tube 2 and a cross piece 3, wherein one end of the armrest tube 2 is connected to the back tube 12 via a first connecting member 4, wherein the armrest tube 2 is connected to the front tube 11 via a second connecting member 5, wherein both ends of the cross piece 3 are connected to the back tube 12 and the front tube 11 via the first connecting member 4, wherein the support tube 1 is used to provide a main supporting force; and a folding unit 6, which is arranged between the front tube 11 and the back tube 12, wherein the folding unit 6 comprises two folding frames 61, wherein the folding frames 61 are crossed and pivotally connected to each other, and wherein the folding unit 6 is used to provide overall folding.

[0021] Specifically, the support tubes 1 are connected by handrail tubes 2 and cross bars 3, so that the overall structure becomes more stable, and the first connecting member 4 and the second connecting member 5 used therebetween make the connection therebetween more firm and less likely to fall off.

[0022] Some preferred / improved embodiments based on the above embodiments will be described below. Any one of the following embodiments may be selected, or multiple embodiments may be selected and combined.

[0023] Specifically, in order to enable the folding unit 6 to fold the entire chair and make the folding unit 6 more secure, the folding frame 61 includes a seat tube 611, two cross tubes 612, and two connecting plates 613. One end of the connecting plate 613 is rotatably set on the cross tube 612, and the other end is rotatably set on the front tube 11 and the back tube 12. One end of the cross tube 612 is rotatably connected to the front tube 11 and the back tube 12, and the other end is fixedly set on the seat tube 611.

[0024] Reference Figure 1As shown, in order to limit the folding unit 6 from exceeding the preset maximum movable path and prevent deformation when the user sits down, when the folding unit 6 is fully unfolded, the seat tube 611 will abut against the connecting piece 613.

[0025] Reference Figure 3 As shown, in order to strengthen the connection between the first connecting member 4 and the handrail tube 2 and the crossbar 3 and prevent the first connecting member 4 from falling out, the handrail tube 2 and the crossbar 3 are hollow inside, and at least a portion of the first connecting member 4 is inserted into the handrail tube 2 and the crossbar 3. The portion of the first connecting member 4 connecting the handrail tube 2 and the crossbar 3 is provided with a longitudinally penetrating circular hole 7 for installing a rivet.

[0026] Specifically, one end of the first connecting member 4 away from the circular hole 7 abuts against the front tube 11 and the back tube 12, and a horizontally penetrating circular hole 7 is provided in the front tube 11 and the back tube 12 for installing a rivet. This arrangement can fix the first connecting member 4 on the back tube 12 to prevent it from falling off.

[0027] Reference Figure 4 As shown, in order to enable the second connecting member 5 to simultaneously connect the horizontally arranged handrail tube 2 and the longitudinally arranged front tube 11 and prevent the second connecting member 5 from falling off, one end of the second connecting member 5 is inserted into the horizontally arranged handrail tube 2 and a longitudinally penetrating circular hole 7 is opened for installing a rivet, and the other end of the second connecting member 5 is inserted into the longitudinally arranged front tube 11 and a horizontally penetrating circular hole 7 is opened for installing a rivet.

[0028] So far, various embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed herein.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present application, and the aforementioned embodiments are only used to illustrate the technical solution of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not drive the essence of the corresponding technical solutions away from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A chair connection structure, characterized in that: include: A support tube, the support tube comprising a back tube and a front tube, the front tube and the back tube are connected via a handrail tube and a crosspiece, one end of the handrail tube is connected to the back tube via a first connector, the handrail tube is connected to the front tube via a second connector, both ends of the crosspiece are connected to the back tube and the front tube via a first connector, and the support tube is used to provide a main supporting force; A folding unit is arranged between the front tube and the back tube, the folding unit comprises two folding frames, the folding frames are crossed and pivotally connected to each other, and the folding unit is used to provide overall folding; The handrail tube and the crossbar are hollow inside, at least a portion of the first connector is inserted into the handrail tube and the crossbar, and a longitudinally penetrating circular hole is provided at a portion of the first connector connecting the handrail tube and the crossbar for installing a rivet; One end of the first connecting member away from the circular hole abuts against the front tube and the back tube, and a horizontally penetrating circular hole is provided in the front tube and the back tube for installing a rivet; One end of the second connecting member is inserted into the horizontally arranged handrail tube and has a longitudinally penetrating circular hole for installing a rivet. The other end of the second connecting member is inserted into the longitudinally arranged front tube and has a horizontally penetrating circular hole for installing a rivet.

2. The chair connection structure according to claim 1, characterized in that: The folding frame includes a seat tube, two cross tubes, and two connecting plates, one end of the connecting plate is rotatably arranged on the cross tube, and the other end is rotatably arranged on the front tube and the back tube. One end of the cross tube is rotatably connected to the front tube and the back tube, and the other end is fixedly arranged on the seat tube.

3. The chair connection structure according to claim 2, characterized in that: When the folding unit is fully unfolded, the seat tube abuts against the connecting piece.

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