CN106617844B

CN106617844B - foldable chair

Info

Publication number: CN106617844B
Application number: CN201611034089.9A
Authority: CN
Inventors: 曹建辉
Original assignee: Guangzhou Shiyuan Electronics Thecnology Co Ltd
Current assignee: Guangzhou Shiyuan Electronics Thecnology Co Ltd
Priority date: 2016-11-14
Filing date: 2016-11-14
Publication date: 2023-09-19
Anticipated expiration: 2036-11-14
Also published as: CN106617844A

Abstract

The invention discloses a foldable chair, comprising: the chair comprises a first support leg frame, a second support leg frame, a sliding piece, a chair seat and a limiting mechanism. The first leg frame and the second leg frame are arranged in a crossing mode and are rotatably connected. The sliding piece is arranged on the second support leg frame and can move along the second support leg frame. The seat is movably connected with the first leg frame and the sliding piece. The limiting mechanism is used for limiting the sliding piece to move on the second support leg frame. The folding mode is an up-down folding mode, the seat is not required to be folded, and therefore materials of the seat are not required to be limited to soft cloth and other materials, but iron frames can be adopted and elastic leather can be paved, and compared with a traditional folding chair, the folding chair can slow down the concave deformation phenomenon of the seat.

Description

Foldable chair

Technical Field

The invention relates to a chair, in particular to a foldable chair.

Background

The conventional foldable chair is foldable from two sides to the middle, so that the seat of the foldable chair must be made of soft cloth or other materials. However, after the service time is long, the soft cloth chair surface is easy to generate bad phenomena such as dent, deformation and the like.

Disclosure of Invention

Based on the above, the invention aims to overcome the defects of the prior art and provide the foldable chair capable of relieving the concave deformation phenomenon of the chair surface.

The technical scheme is as follows: a foldable chair comprising: the first support leg frame and the second support leg frame are arranged in a crossing manner and are rotatably connected; a slider mounted on the second leg frame and movable along the second leg frame; the chair seat is movably connected with the first leg frame and the sliding piece; and the limiting mechanism is used for limiting the sliding piece to move on the second support leg frame.

In one embodiment, the first leg frame comprises a first supporting rod, a second supporting rod and a first cross beam, wherein the first supporting rod and the second supporting rod are arranged in parallel, and the first supporting rod and the second supporting rod are connected through the first cross beam; the second leg frame comprises a third supporting rod, a fourth supporting rod and a second cross beam, wherein the third supporting rod and the fourth supporting rod are arranged in parallel, the third supporting rod and the fourth supporting rod are connected through the second cross beam, the third supporting rod and the first supporting rod are arranged in a crossed mode and are rotatably connected, and the fourth supporting rod and the second supporting rod are arranged in a crossed mode and are rotatably connected; the sliding piece comprises a first sliding piece and a second sliding piece, the first sliding piece is arranged on the third supporting rod and can move along the third supporting rod, and the second sliding piece is arranged on the fourth supporting rod and can move along the fourth supporting rod; the seat is movably connected with the first support rod, the second support rod, the first sliding piece and the second sliding piece; the limiting mechanism is used for limiting the first sliding piece to move on the third supporting rod and limiting the second sliding piece to move on the fourth supporting rod.

In one embodiment, the limiting mechanism comprises a first plate, a second plate, a first limiting piece, a second limiting piece, a first pushing piece, a second pushing piece, a first clamping block and a second clamping block; the first plate is rotatably connected with the first sliding part, the first limiting part is connected with the third supporting rod, the first plate is provided with a first concave part for accommodating the first limiting part, the first clamping block is in sliding fit with the first plate, the first pushing part is connected with the first clamping block, and the first clamping block is used for abutting against the first limiting part so that the first limiting part is limited in the first concave part;

the second plate is rotatably connected with the second sliding part, the second limiting part is connected with the fourth supporting rod, the second plate is provided with a second concave part for accommodating the second limiting part, the second clamping block is in sliding fit with the second plate, the second pushing part is connected with the second clamping block, and the second clamping block is used for abutting against the second limiting part so that the second limiting part is limited in the second concave part.

In one embodiment, the limiting mechanism further comprises a third cross beam, and the first pushing piece and the second pushing piece are connected through the third cross beam.

In one embodiment, the first plate is provided with a first strip-shaped opening and a second strip-shaped opening in parallel, the first strip-shaped opening is communicated with the first concave part, the second plate is provided with a third strip-shaped opening and a fourth strip-shaped opening in parallel, and the third strip-shaped opening is communicated with the second concave part; the first clamping block and the first limiting piece can move along the first strip-shaped opening, and the second clamping block and the second limiting piece can move along the third strip-shaped opening; one end of the third cross beam is connected with the first plate through the second strip-shaped opening, the other end of the third cross beam is connected with the second plate through the fourth strip-shaped opening, and the third cross beam can move along the third strip-shaped opening and the fourth strip-shaped opening.

In one embodiment, the first plate is provided with a first guide sleeve, and the first pushing piece comprises a first guide rod which is installed in the first guide sleeve and is in sliding fit with the first guide sleeve; the second plate is provided with a second guide sleeve, and the second pushing piece comprises a second guide rod which is arranged in the second guide sleeve and is in sliding fit with the second guide sleeve.

In one embodiment, the foldable chair further comprises a first torsion spring and a second torsion spring; the first plate is provided with a first locating pin, the first torsion spring is sleeved on the first locating pin, one end of the first torsion spring is in contact with the first sliding piece, and the other end of the first torsion spring is in contact with the first plate; the second plate is provided with a second locating pin, the second torsion spring is sleeved on the second locating pin, one end of the second torsion spring is abutted against the second sliding piece, and the other end of the second torsion spring is abutted against the second plate.

In one embodiment, the foldable chair further comprises a first armrest and a second armrest, the first armrest is connected with a first support post, the second armrest is connected with a second support post, the first support post is in sliding fit with the first support rod, and the second support post is in sliding fit with the second support rod.

In one embodiment, the first armrest is rotatably coupled to the first post and the second armrest is rotatably coupled to the second post.

In one embodiment, the foldable chair further comprises a chair back, a front roller and a rear roller, wherein the chair back is rotatably connected with the chair; the bottom of the first leg frame is connected with the rear roller, and the bottom of the second leg frame is connected with the front roller.

The principle and effect of the present invention are further described below with reference to the above technical schemes:

1. when the foldable chair is in a use state, the sliding piece can be limited on the second support leg frame through the limiting mechanism, so that the chair seat can be fixed on the first support leg frame and the second support leg frame; when in a folding state, the limiting mechanism does not limit the sliding piece on the second support leg frame, and the sliding piece can move along the second support leg frame, so that the first support leg frame and the second support leg frame can rotate relatively to fold. Therefore, the folding mode of the foldable chair of the embodiment is an up-down folding mode, the seat is not required to be folded, the material of the seat is not required to be limited to soft cloth and other materials, but an iron frame can be adopted and elastic leather can be paved, and compared with the traditional foldable chair, the concave deformation phenomenon of the seat can be slowed down.

2. When the first limiting piece is arranged in the first concave portion, the first clamping block is pushed by the first pushing piece, and can abut against the first limiting piece to enable the first limiting piece to be limited in the first concave portion, and at the moment, the first sliding piece is limited in the third supporting rod. The first clamping block is pushed again through the first pushing piece, so that the first clamping block loosens the first limiting piece, the first limiting piece can be moved out of the first concave part, at the moment, the first sliding piece can move along the third supporting rod, and folding operation between the third supporting rod and the first supporting rod can be carried out. When the second limiting piece is arranged in the second concave portion, the second clamping block is pushed by the second pushing piece, and can abut against the second limiting piece to limit the second limiting piece to be positioned in the second concave portion, and at the moment, the second sliding piece is limited to the fourth supporting rod. The second clamping block is pushed again through the second pushing piece, so that the second clamping block loosens the second limiting piece, the second limiting piece can be moved out of the second concave part, at the moment, the second sliding piece can move along the fourth supporting rod, and folding operation between the fourth supporting rod and the second supporting rod can be performed. Therefore, the limiting mechanism can be convenient to realize whether the first sliding piece is limited on the third supporting rod and whether the second sliding piece is limited on the fourth supporting rod, and the chair is convenient to be converted into a folded state from a use state.

Drawings

FIG. 1 is a simplified schematic view of a foldable chair according to an embodiment of the present invention;

FIG. 2 is a simplified schematic diagram showing a folded state of the foldable chair according to the embodiment of the present invention;

FIG. 3 is a schematic view of the foldable chair according to the embodiment of the present invention in a state where the first clamping block is in contact with the first limiting member;

FIG. 4 is a partial schematic view of the first tightening block of FIG. 3 in a state of abutting against the first limiting member;

FIG. 5 is a schematic view of a foldable chair according to an embodiment of the present invention when a first tightening block is separated from a first limiting member;

FIG. 6 is a partial schematic view of the first tightening block of FIG. 5 separated from the first limiting member;

FIG. 7 is a schematic view of the foldable chair according to the embodiment of the invention when the first limiting member moves out of the first recess;

FIG. 8 is a schematic view of the overall structure of the foldable chair according to the embodiment of the present invention in the use state;

FIG. 9 is a schematic view of a foldable chair back according to an embodiment of the present invention after being folded;

FIG. 10 is a schematic view of a first leg of a collapsible chair incorporating a first support bar according to an embodiment of the present invention;

FIG. 11 is a schematic view showing a first leg rest and a second leg rest of a foldable chair according to an embodiment of the present invention when the first leg rest and the second leg rest are ready to be rotated and folded;

FIG. 12 is a schematic view showing a first leg rest and a second leg rest of the foldable chair according to the embodiment of the present invention after being rotated and folded;

fig. 13 is a schematic view of a foldable chair according to an embodiment of the present invention after the first armrest and the second armrest are rotated and folded;

fig. 14 is a schematic view of a folding chair according to an embodiment of the present invention in a state in which a telescopic rod is retracted to drive an anti-tilting wheel to fold.

Reference numerals illustrate:

10. the first leg rest, 11, the first support bar, 20, the second leg rest, 21, the third support bar, 30, the slider, 31, the first slider, 32, the second slider, 40, the seat, 50, the stopper mechanism, 51, the first plate, 511, the first recess, 512, the first strip-shaped opening, 513, the second strip-shaped opening, 514, the first guide bush, 52, the second plate, 521, the second recess, 522, the third strip-shaped opening, 523, the fourth strip-shaped opening, 524, the second guide bush, 525, the second positioning pin, 53, the first stopper, 54, the second stopper, 55, the first pusher, 551, the first guide bar, 56, the second pusher, 561, the second guide bar, 57, the first tightening block, 58, the second tightening block, 59, the third cross member, 61, the first torsion spring, 62, the second torsion spring, 71, the first guide bush, 72, the second plate, 73, the first support post, 74, the second support post, 80, the back of the seat, 92, the front arm rest, the rear rest, 93, the roller, the rear rest, and the telescopic rail.

Detailed Description

The following describes embodiments of the present invention in detail:

as shown in fig. 1 and 2, a foldable chair according to an embodiment of the present invention includes: the first leg frame 10, the second leg frame 20, the slider 30, the seat 40, and the stopper mechanism 50. The first leg frame 10 is disposed to intersect with the second leg frame 20 and is rotatably connected thereto. The slider 30 is mounted on the second leg frame 20 and is movable along the second leg frame 20. The seat 40 is movably connected with the first leg rest 10 and the sliding member 30. The limiting mechanism 50 is used to limit the movement of the slider 30 on the second leg frame 20.

In the use state of the foldable chair, the sliding member 30 can be limited on the second leg frame 20 by the limiting mechanism 50, so that the seat 40 can be fixed on the first leg frame 10 and the second leg frame 20; in the folded state, the limiting mechanism 50 does not limit the sliding member 30 on the second leg frame 20, and the sliding member 30 can move along the second leg frame 20, so that the first leg frame 10 and the second leg frame 20 can rotate relatively to fold. Therefore, the folding manner of the foldable chair of the present embodiment is an up-down folding manner, so that the seat 40 does not need to be folded, and the material of the seat 40 does not need to be limited to soft cloth, but can be an iron frame and an elastic leather layer, so that the concave deformation phenomenon of the seat can be slowed down compared with the conventional foldable chair.

Referring to fig. 3-7, the first leg rest 10 includes a first support bar 11, a second support bar, and a first cross member. The first support rods 11 are arranged in parallel with the second support rods, and the first support rods 11 are connected with the second support rods through the first cross beams. The second leg frame 20 includes a third support bar 21, a fourth support bar, and a second cross member. The third supporting rod 21 and the fourth supporting rod are arranged in parallel, and the third supporting rod 21 and the fourth supporting rod are connected through the second cross beam. The third support rod 21 is disposed to cross the first support rod 11 and rotatably connected thereto, and the fourth support rod is disposed to cross the second support rod and rotatably connected thereto. The slider 30 includes a first slider 31 and a second slider 32. The first slider 31 is mounted on the third support bar 21 and is movable along the third support bar 21. The second slider 32 is mounted on the fourth support bar and is movable along the fourth support bar. In this embodiment, the first sliding member 31 and the second sliding member 32 may be a first sliding sleeve and a second sliding sleeve, and the first sliding sleeve and the second sliding sleeve are respectively sleeved on the third supporting rod 21 and the fourth supporting rod, and the first sliding sleeve and the second sliding sleeve can respectively move along the third supporting rod 21 and the fourth supporting rod by pushing the first sliding sleeve and the second sliding sleeve, so that folding operation can be performed.

The seat 40 is movably connected with the first support rod 11, the second support rod, the first sliding member 31 and the second sliding member 32. In this embodiment, the seat 40 is rotationally connected with the first supporting rod 11, the second supporting rod, the first sliding member 31 and the second sliding member 32 through the pin shafts and the pin holes, so that the seat 40 is not easy to shake and has better stability in the use process.

The limiting mechanism 50 is used for limiting the movement of the first slider 31 on the third support bar 21 and limiting the movement of the second slider 32 on the fourth support bar. After the first sliding piece 31 and the second sliding piece 32 are respectively limited to the third supporting rod 21 and the fourth supporting rod through the limiting mechanism 50, the first sliding sleeve and the second sliding sleeve can be prevented from moving along the third supporting rod 21 and the fourth supporting rod respectively, so that the position of the chair seat 40 is fixed, and the chair seat can be used.

Referring to fig. 4 and 6, the limiting mechanism 50 includes a first plate 51, a second plate 52, a first limiting member 53, a second limiting member 54, a first pushing member 55, a second pushing member 56, a first tightening block 57 and a second tightening block 58.

The first plate 51 is rotatably connected to the first slider 31. The first limiting member 53 is connected to the third supporting rod 21, and the first plate 51 is provided with a first recess 511 for accommodating the first limiting member 53. The first tightening block 57 is slidably engaged with the first plate 51, and the first pushing member 55 is connected to the first tightening block 57. The first tightening block 57 is used to abut against the first limiting member 53 so that the first limiting member 53 is limited in the first recess 511. When the first limiting member 53 is disposed in the first concave portion 511, the first pushing member 55 pushes the first tightening block 57, and the first tightening block 57 can abut against the first limiting member 53 to limit the first limiting member 53 in the first concave portion 511 (as shown in fig. 3 and 4), and at this time, the first sliding member 31 is limited to the third supporting rod 21. The first slider 31 can move along the third support bar 21 to enable the folding operation between the third support bar 21 and the first support bar 11 by pushing the first tightening block 57 again by the first pushing member 55 to release the first stopper 53 (see fig. 5 and 6), and then the first stopper 53 can be removed from the first recess 511 (fig. 7 illustrates a state in which the first stopper 53 is removed from the first recess 511).

The second plate 52 is rotatably connected to the second slider 32. The second limiting member 54 is connected to the fourth supporting rod, and the second plate 52 is provided with a second recess 521 for accommodating the second limiting member 54. The second tightening block 58 is slidably engaged with the second plate 52, and the second pushing member 56 is connected to the second tightening block 58. The second tightening block 58 is configured to abut against the second limiting member 54 to limit the second limiting member 54 in the second recess 521. Similarly, when the second limiting member 54 is disposed in the second concave portion 521, the second pushing member 56 pushes the second tightening block 58, and the second tightening block 58 can abut against the second limiting member 54 to limit the second limiting member 54 to the second concave portion 521, and at this time, the second sliding member 32 is limited to the fourth supporting rod. The second pushing member 56 pushes the second tightening block 58 again, so that the second tightening block 58 releases the second limiting member 54, and the second limiting member 54 can be moved out of the second recess 521, and at this time, the second sliding member 32 can move along the fourth supporting rod, so that the folding operation between the fourth supporting rod and the second supporting rod can be performed.

The spacing mechanism 50 also includes a third cross member 59. The first pushing member 55 and the second pushing member 56 are connected by the third cross member 59. The third cross beam 59 can enable the first pushing member 55 and the second pushing member 56 to push and pull simultaneously, so that the use is convenient.

The first plate 51 is provided with a first strip-shaped opening 512 and a second strip-shaped opening 513 in parallel. The first bar-shaped port 512 communicates with the first concave portion 511. The second plate 52 is provided with a third strip-shaped opening 522 and a fourth strip-shaped opening 523 in parallel. The third bar-shaped port 522 communicates with the second recess 521. The first clamping block 57 and the first stopper 53 can move along the first bar-shaped opening 512. The second tightening block 58 and the second stopper 54 can move along the third bar-shaped opening 522.

One end of the third cross beam 59 is connected to the first plate 51 through the second strip-shaped opening 513, the other end of the third cross beam 59 is connected to the second plate 52 through the fourth strip-shaped opening 523, and the third cross beam 59 can move along the third strip-shaped opening 522 and the fourth strip-shaped opening 523.

The first plate 51 is provided with a first guide sleeve 514. The first pushing member 55 includes a first guide bar 551. The first guide bar 551 is fitted into the first guide sleeve 514 and slidably engaged with the first guide sleeve 514. The second plate 52 is provided with a second guide sleeve 524. The second pusher 56 includes a second guide bar 561. The second guide bar 561 is fitted into the second guide housing 524 and slidably engaged with the second guide housing 524. In this way, the first guide sleeve 514 and the second guide sleeve 524 respectively guide the first guide rod 551 and the second guide rod 561, and the third cross beam 59 guides the first clamping block 57 and the second clamping block 58 through the second strip-shaped opening 513 and the fourth strip-shaped opening 523, so that the first clamping block 57 and the second clamping block 58 respectively abut against the first limiting piece 53 and the second limiting piece 54 or are separated from the first limiting piece 53 and the second limiting piece 54, and the structural stability is good.

The foldable chair further comprises a first torsion spring 61 and a second torsion spring 62. The first plate 51 is provided with a first positioning pin. The first torsion spring 61 is sleeved on the first positioning pin, one end of the first torsion spring 61 is abutted against the first slider 31, and the other end of the first torsion spring 61 is abutted against the first plate 51. The second plate 52 is provided with a second positioning pin 525. The second torsion spring 62 is sleeved on the second positioning pin 525, one end of the second torsion spring 62 abuts against the second slider 32, and the other end of the second torsion spring 62 abuts against the second plate 52. As such, the first torsion spring 61 can cause the first plate 51 to press against the first stopper 53, and the second torsion spring 62 can cause the second plate 52 to press against the second stopper 54.

Referring to fig. 8-14, fig. 8-14 illustrate the progressive folding transition of the collapsible chair from the use position to the fully folded position. The foldable chair further comprises a first arm rest 71 and a second arm rest 72. The first armrest 71 is connected to a first pillar 73, and the second armrest 72 is connected to a second pillar 74. The first support post 73 is in sliding engagement with the first support bar 11, and the second support post 74 is in sliding engagement with the second support bar. In this embodiment, the first support rod 11 and the second support rod are sleeves, the first support column 73 and the second support column 74 can be installed in the sleeves, and the first support column 73 and the second support column 74 can move along the sleeves, and the heights of the first armrest 71 and the second armrest 72 relative to the seat 40 (as shown in fig. 9 and 10) can be adjusted by adjusting the lengths of the first support column 73 and the second support column 74 extending out of the sleeves, so that the chair can be folded conveniently.

The first armrest 71 is rotatably connected to the first post 73. The second armrest 72 is rotatably coupled to the second post 74. Thus, after the chair is folded, the first handrail 71 and the second handrail 72 are rotated, so that the first handrail 71 and the second handrail 72 are respectively close to the first pillar 73 and the second pillar 74 (as shown in fig. 12 and 13), and the occupied space of the folded chair can be reduced.

The foldable chair further comprises a back 80, a front roller 91 and a rear roller 92. The seat back 80 is rotatably coupled to the seat. The bottom of the first leg frame 10 is connected with the rear roller 92, and the bottom of the second leg frame 20 is connected with the front roller 91. The back 80 is folded with the seat 40 by rotating the back 80 (as shown in fig. 8 and 9). Wherein, the rear roller 92 may be connected with an anti-tilting wheel 94 through a telescopic rod 93. The extension length of the anti-tilt wheel 94 can be adjusted by the telescopic rod 93, and after the chair is folded, the anti-tilt wheel 94 can be retracted by retracting the telescopic rod 93 (as shown in fig. 13 and 14), so that the occupied space of the folded chair is reduced.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. A foldable chair, comprising:

the first support leg frame and the second support leg frame are arranged in a crossing manner and are rotatably connected;

a slider mounted on the second leg frame and movable along the second leg frame;

the chair seat is movably connected with the first leg frame and the sliding piece; a kind of electronic device with high-pressure air-conditioning system

The limiting mechanism is used for limiting the sliding piece to move on the second support leg frame;

the first support leg frame comprises a first support rod, a second support rod and a first cross beam, wherein the first support rod and the second support rod are arranged in parallel, and the first support rod is connected with the second support rod through the first cross beam;

the second leg frame comprises a third supporting rod, a fourth supporting rod and a second cross beam, wherein the third supporting rod and the fourth supporting rod are arranged in parallel, the third supporting rod and the fourth supporting rod are connected through the second cross beam, the third supporting rod and the first supporting rod are arranged in a crossed mode and are rotatably connected, and the fourth supporting rod and the second supporting rod are arranged in a crossed mode and are rotatably connected;

the sliding piece comprises a first sliding piece which is arranged on the third supporting rod and can move along the third supporting rod;

the seat is movably connected with the first supporting rod, the second supporting rod and the first sliding piece;

the limiting mechanism is used for limiting the first sliding piece to move on the third supporting rod;

the limiting mechanism comprises a first plate, a first limiting piece, a first pushing piece and a first clamping block;

the first plate is rotatably connected with the first sliding part, the first limiting part is connected with the third supporting rod, the first plate is provided with a first concave part for accommodating the first limiting part, the first clamping block is in sliding fit with the first plate, the first pushing part is connected with the first clamping block, and the first clamping block is used for abutting against the first limiting part so that the first limiting part is limited in the first concave part.

2. The foldable chair according to claim 1, wherein,

the sliding piece further comprises a second sliding piece which is arranged on the fourth supporting rod and can move along the fourth supporting rod;

the seat is also movably connected with the second sliding piece;

the limiting mechanism is also used for limiting the second sliding piece to move on the fourth supporting rod.

3. The foldable chair according to claim 2, wherein the limiting mechanism further comprises a second plate, a second limiting member, a second pushing member, and a second tightening block;

4. The folding chair as in claim 3, wherein the limit mechanism further comprises a third cross member, the first pushing member and the second pushing member being connected by the third cross member.

5. The chair of claim 4, wherein the first plate is provided with a first strip-shaped opening and a second strip-shaped opening in parallel, the first strip-shaped opening is communicated with the first concave portion, the second plate is provided with a third strip-shaped opening and a fourth strip-shaped opening in parallel, and the third strip-shaped opening is communicated with the second concave portion;

the first clamping block and the first limiting piece can move along the first strip-shaped opening, and the second clamping block and the second limiting piece can move along the third strip-shaped opening;

one end of the third cross beam is connected with the first plate through the second strip-shaped opening, the other end of the third cross beam is connected with the second plate through the fourth strip-shaped opening, and the third cross beam can move along the third strip-shaped opening and the fourth strip-shaped opening.

6. A foldable chair according to claim 3, wherein the first plate is provided with a first guide sleeve, and the first pusher comprises a first guide bar which fits into and slidingly engages the first guide sleeve; the second plate is provided with a second guide sleeve, and the second pushing piece comprises a second guide rod which is arranged in the second guide sleeve and is in sliding fit with the second guide sleeve.

7. The foldable chair of claim 3, further comprising a first torsion spring and a second torsion spring; the first plate is provided with a first locating pin, the first torsion spring is sleeved on the first locating pin, one end of the first torsion spring is in contact with the first sliding piece, and the other end of the first torsion spring is in contact with the first plate; the second plate is provided with a second locating pin, the second torsion spring is sleeved on the second locating pin, one end of the second torsion spring is abutted against the second sliding piece, and the other end of the second torsion spring is abutted against the second plate.

8. The foldable chair of claim 2, further comprising a first armrest coupled with a first leg and a second armrest coupled with a second leg, the first leg being in sliding engagement with the first support bar and the second leg being in sliding engagement with the second support bar.

9. The foldable chair of claim 8, wherein the first armrest is rotatably coupled to the first leg and the second armrest is rotatably coupled to the second leg.

10. The foldable chair according to any one of claims 1 to 9, further comprising a back, a front roller and a rear roller, the back being rotatably connected to the seat; the bottom of the first leg frame is connected with the rear roller, and the bottom of the second leg frame is connected with the front roller.