A portable folding chair

Abstract

The utility model relates to folding chair technical field, specifically disclose a portable folding chair, and the front, rear cross respectively are by two bar pieces of middle part rotation connection are formed, backrest pipe bottom end rotation connection is in rear cross two bar bottom end, backrest slide seat sliding sleeve connection is in backrest pipe, and rear cross two bar top end rotation connection is in backrest slide seat, and the front leg pipe bottom end rotation connection is in the front cross two bar bottom end and top end rotation connection is in backrest slide seat, handrail pipe rear end rotation connection is in backrest pipe outside wall, and the front leg slide seat sliding sleeve is installed on the front leg pipe, and handrail support bar bottom end rotation connection is in the front leg slide seat and top end swing joint is in handrail subassembly, and the connecting piece rotation connection is in handrail support bar middle part, and the front cross two bar top end rotation connection is in the connecting piece, and seat pipe rear end rotation connection is in backrest pipe middle part and middle part and front leg pipe rotation connection, and seat rest surface upper and lower part two sides respectively sleeve connection is in backrest pipe top and seat pipe front part. Significantly improved the portability and stability of folding chair.

Description

Technical Field

[0001] This utility model relates to the field of folding chair technology, specifically a portable folding chair. Background Technology

[0002] Folding chairs have gained popularity due to their lightweight structure, stackability, and ease of movement and storage. Currently, commonly used folding chairs typically consist of a frame, two legs, a seat cushion, and a backrest.

[0003] The chair legs and frame are movably interlocked, the seat cushion is movably assembled into the frame, and the backrest is assembled into the top of the frame; therefore, each chair leg and seat cushion can be unfolded on one side of the frame to allow the passenger to sit on the seat cushion, or the chair legs and seat cushion can be pushed against the frame to achieve a folding effect.

[0004] However, when folding, the legs and seat of these types of folding chairs are simply pushed against the frame, and the width of the frame and seat remains the same when unfolded. This means that these folding chairs still occupy a significant amount of space when folded, thus compromising portability. Furthermore, commonly used folding chairs often suffer from insufficient stability and even weak load-bearing capacity. Summary of the Invention

[0005] The purpose of this invention is to provide a portable folding chair to solve the problems of insufficient portability and inadequate stability of current folding chairs.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a portable folding chair, wherein the front cross and rear cross are each composed of two rods rotatably connected in the middle; the bottom ends of the two backrest tubes are rotatably connected to the bottom ends of the two rods of the rear cross; the two backrest slides are slidably sleeved on the upper side of the middle of the backrest tubes, and the top ends of the two rods of the rear cross are rotatably connected to the inner side of the backrest slides; the bottom ends of the two front leg tubes are rotatably connected to the bottom ends of the two rods of the front cross, and their top ends are rotatably connected to the front of the backrest slides; the rear ends of the two armrest tubes are rotatably connected to the outer wall of the backrest tubes and located below the backrest slides; the two armrest assemblies... The two front leg slides are respectively fitted onto the armrest tubes; the two front leg slides are respectively slidably fitted onto the lower side of the middle of the front leg tubes; the bottom ends of the two armrest support rods are respectively rotatably connected to the front of the front leg slides, and the top ends are respectively movably connected to the bottom of the armrest assembly; the two connectors are respectively rotatably connected to the inner side of the middle of the armrest support rods, and the top ends of the two rods of the front cross are respectively rotatably connected to the bottom of the connector; the rear ends of the two seat tubes are respectively rotatably connected to the inner side of the middle of the backrest tube, the middle of the seat tube is rotatably connected to the inner side of the front leg tube, and the seat tube is supported on the top surface of the connector; the upper and lower sides of the seat back are respectively fitted onto the top of the backrest tube and the front of the seat tube.

[0007] Preferably, the handrail assembly includes a guide shaft, a sleeve fitted onto the handrail tube, and a grooved housing fixed to the front of the bottom face of the sleeve. The two side walls of the grooved housing are respectively provided with axial sliding grooves. The two ends of the guide shaft are respectively slidably engaged in the sliding grooves. The top end of the handrail support rod is movably engaged in the inner cavity of the grooved housing and rotatably sleeved with the middle part of the guide shaft.

[0008] Preferably, the front leg tube is fixedly fitted with a front positioning sleeve at the position below the front leg slide, the backrest tube is fixedly fitted with a rear positioning sleeve at the position below the backrest slide, and the rear end of the armrest tube is rotatably connected to the outer wall of the rear positioning sleeve.

[0009] Preferably, the front foot includes a base plate 1, a sleeve 3 located on the outer side of the top surface of the base plate 1 and tilted backward at the top, and an ear seat 2 located on the inner side of the top surface of the base plate 1. The rear foot includes a base plate 2, a sleeve 4 located on the outer side of the top surface of the base plate 2 and extending vertically, and an ear seat 3 located on the inner side of the top surface of the base plate 2. The bottom ends of the two rods of the front cross are rotatably connected to the ear seat 2, the bottom end of the front leg tube is fixedly sleeved with the sleeve 3, the bottom ends of the two rods of the rear cross are rotatably connected to the ear seat 3, and the bottom end of the backrest tube is fixedly sleeved with the sleeve 4.

[0010] Preferably, the front leg slide includes a sleeve that is slidably fitted onto the front leg tube and an ear seat integrally formed on the front wall of the sleeve and rotatably connected to the bottom end of the handrail support.

[0011] Preferably, the backrest slide includes a second sleeve that is slidably fitted onto the backrest tube, a second hinge groove located on the front side of the second sleeve and rotatably connected to the top end of the front leg tube, and a first hinge groove located on the inner side of the second sleeve and rotatably connected to the top ends of the two rods of the rear cross.

[0012] Preferably, the bottom front side of the connector is provided with a hinge groove three that is rotatably connected to the top ends of the two rods of the front cross, and the top surface of the connector is provided with an arc-shaped groove that matches the seat tube.

[0013] Preferably, the seat back surface includes a seat surface, a back surface integrally formed at the rear end of the seat surface, a sleeve one fixed to both sides of the bottom surface of the seat surface and sleeved with the seat tube, and a sleeve two fixed to both sides of the back of the back surface and sleeved with the top of the backrest tube.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. The portable folding chair disclosed in this utility model has good structural linkage, and the operation of unfolding and closing is convenient and quick; moreover, the structure has good stability and strong load-bearing capacity.

[0016] 2. The portable folding chair of this utility model has a simple and beautiful appearance, can be retracted in both directions, and has a small volume when closed, which significantly improves its portability. Attached Figure Description

[0017] Figure 1 This is a first three-dimensional structural diagram of the unfolded folding chair of this utility model;

[0018] Figure 2 This is a second three-dimensional structural diagram of the folding chair of this utility model in its unfolded state;

[0019] Figure 3 This is a front view structural diagram of the unfolded folding chair of this utility model;

[0020] Figure 4 This is a rear view structural diagram of the folding chair of this utility model in its unfolded state;

[0021] Figure 5 This is a three-dimensional structural diagram of the skeleton of this utility model in a folded state;

[0022] Figure 6 This is a three-dimensional structural diagram of the front leg slide of this utility model;

[0023] Figure 7This is a three-dimensional structural diagram of the backrest slide of this utility model;

[0024] Figure 8 This is a three-dimensional structural diagram of the connector of this utility model;

[0025] Figure 9 This is a three-dimensional structural diagram of the handrail assembly of this utility model;

[0026] Figure 10 This is a three-dimensional structural diagram of the seat surface of this utility model;

[0027] Figure 11 This is a three-dimensional structural diagram of the front foot of this utility model;

[0028] Figure 12 This is a three-dimensional structural diagram of the rear foot of this utility model.

[0029] In the diagram: 1 - the front cross;

[0030] 2- The back cross;

[0031] 3-Backrest tube;

[0032] 4-Foreleg tubes;

[0033] 5-Handrail tube;

[0034] 6- Seat tube;

[0035] 7-Handrail support bar;

[0036] 8-Front leg slide; 8.1-Sleeve 1; 8.2-Ear seat 1;

[0037] 9-Backrest slide; 9.1-Sleeve 2; 9.2-Hinge slot 1; 9.3-Hinge slot 2;

[0038] 10-Connector; 10.1-Arc-surface groove; 10.2-Hinge groove three;

[0039] 11-Handrail assembly; 11.1-Tube sleeve; 11.2-Slotted housing; 11.3-Guide shaft; 11.4-Slide groove;

[0040] 12-Seat backrest; 12.1-Seat surface; 12.2-Backrest; 12.3-Sleeve 1; 12.4-Sleeve 2;

[0041] 13-Front foot; 13.1-Base plate one; 13.2-Sleeve three; 13.3-Ear seat two;

[0042] 14-Rear foot; 14.1-Base plate two; 14.2-Sleeve four; 14.3-Ear seat three;

[0043] 15 - Front positioning sleeve;

[0044] 16-Rear positioning sleeve. Detailed Implementation

[0045] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0046] Please see Figure 1-12 A portable folding chair includes a foldable frame and a seat / backrest 12. The foldable frame structure includes: a front cross 1, a rear cross 2, a backrest tube 3, a front leg tube 4, an armrest tube 5, a seat tube 6, an armrest support 7, a front leg slide 8, a backrest slide 9, a connector 10, an armrest assembly 11, a front base 13, a rear base 14, a front positioning sleeve 15, and a rear positioning sleeve 16.

[0047] The front cross 1 and the rear cross 2 are each composed of two rods that are rotatably connected in the middle.

[0048] The front leg slide 8 includes a sleeve 8.1 and an ear seat 8.2 integrally formed on the front wall of the sleeve 8.1.

[0049] The backrest slide 9 includes a second sleeve 9.1, a second hinge groove 9.3 integrally formed on the front side of the second sleeve 9.1, and a first hinge groove 9.2 integrally formed on the inner side of the second sleeve 9.1.

[0050] The connector 10 has a hinge groove 10.2 on the front side of its bottom and an arc groove 10.1 on its top surface.

[0051] The handrail assembly 11 includes a guide shaft 11.3, a sleeve 11.1, and a grooved housing 11.2 fixed to the front of the bottom of the sleeve 11.1. The two side walls of the grooved housing 11.2 are respectively provided with axial sliding grooves 11.4, and the two ends of the guide shaft 11.3 are respectively slidably engaged in the sliding grooves 11.4. A shaft plug is fitted at the end of the guide shaft 11.3.

[0052] The front foot 13 includes a base plate 13.1, a sleeve 13.2 integrally formed on the outer side of the top surface of the base plate 13.1 and with the top tip tilted backward, and an ear seat 13.3 integrally formed on the inner side of the top surface of the base plate 13.1.

[0053] The rear foot 14 includes a base plate 2 14.1, a sleeve 4 14.2 integrally formed on the outer side of the top surface of the base plate 2 14.1 and extending vertically, and an ear seat 3 14.3 integrally formed on the inner side of the top surface of the base plate 2 14.1.

[0054] The bottom ends of the two rods of the front cross 1 are rotatably connected to the ear seat 2 13.3, and the top ends of the two rods of the front cross 1 are rotatably connected to the hinge groove 3 10.2.

[0055] The bottom ends of the two rods of the rear cross 2 are rotatably connected to the ear seat 3 14.3, and the top ends of the two rods of the rear cross 2 are rotatably connected to the hinge groove 1 9.2.

[0056] The bottom ends of the two backrest tubes 3 are respectively fixedly fitted into the corresponding sleeves 14.2. A rear positioning sleeve 16 is fixedly fitted on the upper side of the middle of the backrest tube 3. Sleeve 2 9.1 is slidably fitted onto the backrest tube 3 and is located above the rear positioning sleeve 16. That is, the backrest slide 9 can move up and down along the backrest tube 3 through sleeve 2 9.1, and the rear positioning sleeve 16 plays a limiting and positioning role for it.

[0057] The bottom ends of the two front leg tubes 4 are respectively fixedly sleeved in the corresponding sleeves 13.2, and the top ends of the front leg tubes 4 are respectively rotatably connected in the corresponding hinge grooves 9.3. The lower side of the middle part of the front leg tubes 4 is respectively fixedly fitted with front positioning sleeves 15. The sleeve 8.1 is slidably fitted on the front leg tubes 4 and located on the upper side of the front positioning sleeves 15. That is, the front leg slide 8 can slide up and down along the front leg tubes 4 through the sleeve 8.1, and the front positioning sleeves 15 play a limiting and positioning role for the front leg slide 8.

[0058] The rear ends of the two handrail tubes 5 are rotatably connected to the outer side wall of the corresponding rear positioning sleeve 16. The front part of the handrail tube 5 is fixedly sleeved inside the tube sleeve 11.1.

[0059] The rear ends of the two seat tubes 6 are rotatably connected to the inner side of the middle of the corresponding backrest tube 3, and the middle part of the seat tube 6 is rotatably connected to the inner side of the corresponding front leg tube 4. The front end of the seat tube 6 is supported and engaged in the arc-shaped groove 10.1.

[0060] The bottom ends of the two handrail rods 7 are rotatably connected to the corresponding ear seats 8.2, the middle part of the handrail rods 7 is rotatably connected to the outer side wall of the connector 10, and the top end of the handrail rods 7 is slidably engaged in the inner cavity of the groove-shaped housing 11.2 and rotatably connected to the middle part of the guide shaft 11.3.

[0061] The seat back surface 12 includes a seat surface 12.1, a back surface 12.2 integrally formed at the rear end of the seat surface 12.1, a sleeve 12.3 fixed to both sides of the bottom surface of the seat surface 12.1 and sleeved with the seat tube 6, and a sleeve 2 12.4 fixed to both sides of the back surface of the back surface 12.2 and sleeved with the top of the backrest tube 3. The bottom surface 12.1 and the back surface 12.2 are made of flexible fabric.

[0062] When the folding chair is folded and closed, the front cross 1 and the rear cross 2 can respectively close and retract laterally.

[0063] The front leg tube 4 and the backrest tube 3 close and retract relative to each other, at which time the backrest slide 9 moves upward along the backrest tube 3.

[0064] The front leg slide 8 moves upward along the front leg tube 4, causing the handrail assembly 11 to close and retract upward along with the handrail tube 5.

[0065] As the front leg tube 4 closes, the seat tube 6 flips upward, thus achieving a closed retraction in the front-to-back direction of the folding chair.

[0066] In particular, during the folding operation in the forward and backward directions, the rods are linked together to achieve rapid closing and retraction.

[0067] It should be noted that in this article, relational terms such as first and second are only used to refer to...

[0068] Distinguishing one entity or operation from another does not necessarily require or imply any such actual relationship or order between those entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0069] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A portable folding chair comprising a frame and a seat (12), characterized in that, The skeleton includes: The front cross (1) and the rear cross (2) are each composed of two rods that are rotatably connected in the middle. Backrest tube (3), the bottom ends of the two backrest tubes (3) are respectively rotatably connected to the bottom ends of the two rods of the rear cross (2); Backrest slide (9), the two backrest slides (9) are respectively slidably sleeved on the upper side of the middle part of the backrest tube (3), and the top ends of the two rods of the rear cross (2) are respectively rotatably connected to the inner side of the backrest slide (9); The bottom ends of the two front leg tubes (4) are respectively rotatably connected to the bottom ends of the two rods of the front cross (1), and the top ends are respectively rotatably connected to the front of the backrest slide (9). Armrest tubes (5), the rear ends of the two armrest tubes (5) are respectively rotatably connected to the outer wall of the backrest tube (3) and located on the lower side of the backrest slide (9); Handrail assembly (11), two of the handrail assemblies (11) are respectively mounted on the handrail tube (5); Front leg slides (8), the two front leg slides (8) are respectively slidably fitted on the lower side of the middle part of the front leg tube (4); The bottom ends of the two handrail supports (7) are rotatably connected to the front of the front leg slide (8), and the top ends are movably connected to the bottom of the handrail assembly (11). Connector (10), the two connectors (10) are respectively rotatably connected to the inner side of the middle of the handrail support (7), and the top ends of the two rods of the front cross (1) are respectively rotatably connected to the bottom of the connector (10); Seat tube (6), the rear ends of the two seat tubes (6) are respectively rotatably connected to the inner side of the middle of the backrest tube (3), the middle of the seat tube (6) is rotatably connected to the inner side of the front leg tube (4), and the seat tube (6) is supported on the top surface of the connector (10). The upper and lower sides of the seat back (12) are respectively fitted onto the top of the backrest tube (3) and the front of the seat tube (6).

2. A portable folding chair as claimed in claim 1, wherein: The handrail assembly (11) includes a guide shaft (11.3), a sleeve (11.1) fitted onto the handrail tube (5), and a grooved housing (11.2) fixed to the front of the bottom face of the sleeve (11.1). The two side walls of the grooved housing (11.2) are respectively provided with axial grooves (11.4). The two ends of the guide shaft (11.3) are respectively slidably engaged in the grooves (11.4). The top end of the handrail support rod (7) is movably engaged in the inner cavity of the grooved housing (11.2) and rotatedly engaged with the middle part of the guide shaft (11.3).

3. The portable folding chair of claim 1, wherein: The front leg tube (4) is fixedly fitted with a front positioning sleeve (15) at the position below the front leg slide (8), and the backrest tube (3) is fixedly fitted with a rear positioning sleeve (16) at the position below the backrest slide (9). The rear end of the armrest tube (5) is rotatably connected to the outer wall of the rear positioning sleeve (16).

4. The portable folding chair of claim 1, wherein: It also includes a front foot (13) and a rear foot (14). The front foot (13) includes a base plate (13.1), a sleeve (13.2) located on the outer side of the top surface of the base plate (13.1) and tilted backward at the top, and an ear seat (13.3) located on the inner side of the top surface of the base plate (13.1). The rear foot (14) includes a base plate (14.1) and a sleeve (14) located on the outer side of the top surface of the base plate (14.1) and extending vertically. 2) and ear seat three (14.3) located on the inner side of the top surface of the bottom plate two (14.1), the bottom ends of the two rods of the front cross (1) are respectively rotatably connected to the ear seat two (13.3), the bottom end of the front leg tube (4) is fixedly sleeved with the sleeve three (13.2), the bottom ends of the two rods of the rear cross (2) are respectively rotatably connected to the ear seat three (14.3), and the bottom end of the backrest tube (3) is fixedly sleeved with the sleeve four (14.2).

5. The portable folding chair of claim 1, wherein: The front leg slide (8) includes a sleeve (8.1) that is slidably sleeved on the front leg tube (4) and an ear seat (8.2) integrally formed on the front wall of the sleeve (8.1) and rotatably connected to the bottom end of the handrail support (7).

6. The portable folding chair of claim 1, wherein: The backrest slide (9) includes a second sleeve (9.1) that is slidably sleeved on the backrest tube (3), a second hinge groove (9.3) located on the front side of the second sleeve (9.1) and rotatably connected to the top end of the front leg tube (4), and a first hinge groove (9.2) located on the inner side of the second sleeve (9.1) and rotatably connected to the top ends of the two rods of the rear cross (2).

7. The portable folding chair of claim 1, wherein: The bottom front side of the connector (10) is provided with a hinge groove three (10.2) that is rotatably connected to the top ends of the two rods of the front cross (1), and the top surface of the connector (10) is provided with an arc-shaped groove (10.1) that is matched with the seat tube (6).

8. A portable folding chair according to claim 1, characterized in that: The seat back surface (12) includes a seat surface (12.1), a back surface (12.2) integrally formed at the rear end of the seat surface (12.1), a sleeve one (12.3) fixed to both sides of the bottom surface of the seat surface (12.1) and sleeved with the seat tube (6), and a sleeve two (12.4) fixed to both sides of the back of the back surface (12.2) and sleeved with the top of the backrest tube (3).

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