CN217937644U - Folding chair - Google Patents

Abstract

The utility model discloses a folding chair, including back of the chair main part, connection reinforcement subassembly, supporting component and lift the subassembly. The utility model discloses a set up the regulating part at handrail right side lower extreme, five fender regulation activities are realized to folding chair, through having set up the connection reinforcement subassembly, under the inside connecting element cooperation of establishing of connection reinforcement subassembly, can realize folding chair whole folding stability, thereby the folding chair junction auxiliary connection reinforcement has been reached, the advantage of the wearing and tearing of folding spare part slows down, and set up supporting component at back of the chair main part left side lower extreme, under notch and lug spacing locking, the support frame can keep the stable supporting state, thereby the advantage of the folding back auxiliary stable support of back of the chair main part of lying has been reached, and establish at seat main part right side lower extreme and lift the subassembly cooperation down, can realize the supplementary lifting of user's shank, thereby the supplementary advantage of lifting and relaxing of user's shank has been reached.

Description

Folding chair

Technical Field

The utility model relates to a folding chair correlation field especially relates to a folding chair.

Background

The folding deck chair is designed according to human engineering, is convenient to fold, has two functions of chair and bed, can be used as a folding bed or a folding chair, can be used for sleeping for a while, and is the first choice of leisure folding furniture;

the existing folding deck chairs can be divided into phosphated steel tube folding chairs, oxford folding deck chairs, carbonized bamboo folding deck chairs and bamboo folding chairs;

the bamboo folding chair is widely used furniture at present, and generally comprises a seat board, a chair back, armrests and supporting legs, wherein the tops of the two supporting legs on each side are rotatably connected, a buckle is arranged in the middle of the bottom of each armrest and is connected with the tops of the two supporting legs, so that the inclination of the chair back can be adjusted, and even the chair back is flatly placed for people to lie for rest;

the folding bamboo chair comprises a seat plate, a chair back, handrails, supporting legs and a footrest, wherein the tops of the two supporting legs on each side are rotatably connected, a multi-groove buckle is arranged in the middle of the bottom of each handrail and is connected with the tops of the two supporting legs, a connecting shaft at the top of each supporting leg is positioned in the multi-groove buckle, the two ends of the seat plate are respectively connected with the chair back and the footrest through shafts, and a multi-stage self-locking telescopic rod is arranged between the middle of each side of the footrest and the middle of each supporting leg;

learn from above-mentioned patent and current bamboo folding chair, current folding chair all can be through the folding mechanism who establishes, expand the use fast or collect the use, but in its use, there is certain problem still, the junction of bamboo folding chair supporting legs and bedplate and the back of the chair promptly, it is comparatively insecure, fold the in-process that opens and shuts many times easily, the not hard up phenomenon appears, lead to bamboo folding chair easily to take place to collapse the phenomenon, and bamboo folding chair is when the folding expansion of lying, lack certain supporting measure, guarantee the whole smooth stability of bamboo folding chair, it is also comparatively inflexible to the measure of lifting of foot simultaneously.

SUMMERY OF THE UTILITY MODEL

Therefore, in order to solve the above disadvantages, the utility model provides a folding chair.

In order to realize the purpose, the utility model discloses take following technical scheme: the utility model provides a folding chair, includes back of the chair main part, back of the chair main part left side upper end is equipped with the headrest, back of the chair main part right side is equipped with the bedplate main part relatively, both ends all rotate with the handrail around back of the chair main part right side and are connected, handrail right side lower extreme middle part is equipped with the regulating part, inside and first supporting leg of regulating part and second supporting leg upper end joint, first supporting leg and second supporting leg middle part are connected with back of the chair main part and bedplate main part respectively, first supporting leg is connected with second supporting leg upper end middle part, still including locating the connection reinforcement subassembly of back of the chair main part and bedplate main part relative department, locate the support subassembly and the bedplate of back of the chair main part left side lower extreme and install in the subassembly that lifts of main part right side lower extreme, connect the reinforcement subassembly including fastening in the first connecting piece at both ends around back of the chair main part right side, peg graft in first connecting piece right side upper end, the second connecting piece that meets in the pivot front side, meet in the left connecting piece of second, the integrative casing pipe upper end, locate the first binding nail of reinforcement and locate the second binding nail at the inside the casing and locate the second binding piece lower extreme.

Preferably, the regulating part comprises a regulating sheet main body, a connecting hole formed in the upper end of the regulating sheet main body, a sliding groove formed in the middle of the front side of the regulating sheet main body, first limiting grooves formed in the left side and the right side of the sliding groove relatively and a second limiting groove formed in the upper end of the middle of the sliding groove, and the regulating sheet main body is fixedly connected with the bottom of the lower end of the right side of the handrail through the connecting hole.

Preferably, the adjusting sheet main body, the connecting hole, the sliding groove, the first limiting groove and the second limiting groove are symmetrically arranged along the front and back of the chair back main body, and the first limiting groove and the second limiting groove are communicated with the sliding groove.

Preferably, the reinforcing member is connected with the seat plate main body through a first fastening nail arranged inside the upper end, and the lower end of the reinforcing member is connected with the first supporting leg through a second fastening nail.

Preferably, the supporting component comprises a supporting frame which is rotatably connected to the lower end of the left side of the chair back main body, first connecting rods which are arranged on the front side and the rear side of the upper end of the supporting frame, a pin shaft which is inserted into the right side of the first connecting rod, a second connecting rod which is arranged on the outer side of the pin shaft, a notch which is arranged on the upper end of the right side of the first connecting rod and a convex block which is clamped inside the notch, wherein the convex block is connected with the left side of the second connecting rod, and the right side of the second connecting rod is rotatably connected with the chair back main body.

Preferably, the first connecting rod, the pin shaft, the second connecting rod, the notch and the bump are symmetrically arranged from top to bottom and from front to back along the support frame, and the notch is integrally formed in a rectangular notch shape.

Preferably, the lifting assembly comprises a leg plate, metal groove members arranged at the front end and the rear end of the left side of the leg plate, a connecting block fixedly arranged at the upper end of the right side of the metal groove member, and a first protrusion and a second protrusion respectively arranged at the bottoms of the left side and the right side of the leg plate, and the metal groove member is fixedly connected with the right side of the seat plate main body through the connecting block arranged at the upper end of the right side.

Preferably, the bottom of the right side of the metal groove piece is provided with a vertical bending part, and the vertical bending part of the metal groove piece is connected with the front end and the rear end of the left side of the leg plate.

The utility model has the advantages that:

the method has the advantages that: the utility model discloses a set up the regulating part at handrail right side lower extreme, realize five fender regulation activities to folding chair.

The method has the advantages that (2): the utility model discloses a set up and connect the reinforcement subassembly, under the inside connecting part cooperation of establishing of connection reinforcement subassembly, can realize that the folding chair is whole folding stable to reached folding chair junction auxiliary connection and consolidated, the advantage of the folding spare part wearing and tearing of speed reduction.

The advantages are that (3): the utility model discloses a set up supporting component at back of the chair main part left side lower extreme, under notch and the spacing locking of lug, the support frame can remain stable support state to the advantage of back of the chair main part flat folding back supplementary stable support has been reached.

Advantage 4: the utility model discloses a set up at bedplate main part right side lower extreme and lift the subassembly cooperation down, can realize the supplementary lifting of user's shank to the supplementary advantage of lifting and relaxing of user's shank has been reached.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the adjusting member of the present invention;

FIG. 3 is a schematic structural view of the connection reinforcement assembly of the present invention;

fig. 4 is a schematic structural view of the support assembly of the present invention;

fig. 5 is a schematic structural view of the lift assembly of the present invention.

Wherein: the chair back comprises a chair back main body-1, a headrest-2, a chair plate main body-3, armrests-4, an adjusting piece-5, an adjusting sheet main body-51, a connecting hole-52, a sliding groove-53, a first limiting groove-54, a second limiting groove-55, a first supporting leg-6, a second supporting leg-7, a connecting and reinforcing component-8, a first connecting piece-81, a rotating shaft-82, a second connecting piece-83, a reinforcing component-84, a sleeve-85, a first fastening nail-86, a second fastening nail-87, a supporting component-9, a supporting frame-91, a first connecting rod-92, a pin shaft-93, a second connecting rod-94, a notch-95, a bump-96, a supporting and lifting component-10, a leg plate-101, a metal groove component-102, a connecting block-103, a first bump-104 and a second bump-105.

Detailed Description

In order to further explain the technical solution of the present invention, the following is a detailed explanation through specific examples.

Please refer to fig. 1-2, the utility model provides a folding chair, including back of the chair main part 1, 1 left side upper end of back of the chair main part is equipped with headrest 2, 1 right side of back of the chair main part is equipped with bedplate main part 3 relatively, back of the chair main part 1 all follows ergonomic design with bedplate main part 3, each board that makes the back of the chair main part 1 and the inside of bedplate main part 3 establish has the radian, both ends all are rotated with handrail 4 around the back of the chair main part 1 right side and are connected, handrail 4 right side lower extreme middle part is equipped with regulating part 5, regulating part 5 inside and first supporting leg 6 and 7 upper end joints of second supporting leg, first supporting leg 6 is connected with back of the chair main part 1 and bedplate main part 3 respectively with 7 middle parts of second supporting leg, first supporting leg 6 is connected with 7 upper end middle parts of second supporting leg, still including the connection reinforcement assembly 8 of locating back of the chair main part 1 and bedplate main part 3 relative department, locate the supporting assembly 9 of the left side lower extreme of back of the chair main part and install in bedplate main part 3 right side lower extreme lift the lift subassembly 10.

Wherein, regulating part 5 in this embodiment is including being used for the folding chair to use angle modulation complex adjustment sheet main part 51, adjustment sheet main part 51 is whole to be L piece cubic, it connects complex connecting hole 52 to set up in adjustment sheet main part 51 upper end to be horizontal sharp, transversely set up in adjustment sheet main part 51 front side middle part and carry out folding direction complex spout 53, the inside smooth nothing barb of spout 53, locate the first spacing groove 54 of the spout 53 left and right sides relatively, the whole rectangle form that is of shape is seted up to first spacing groove 54, the equidistance is seted up in spout 53 middle part upper end and is carried out the spacing complex second spacing groove 55 of angle modulation, the third has been seted up along spout 53 upper end middle part equidistance to second spacing groove 55, adjustment sheet main part 51 passes through connecting hole 52 and handrail 4 right side lower extreme bottom fastening connection.

Further, the adjusting piece main body 51, the connecting hole 52, the sliding groove 53, the first limiting groove 54 and the second limiting groove 55 are symmetrically arranged along the front and back of the chair back main body 1, and the first limiting groove 54 and the second limiting groove 55 are communicated with the sliding groove 53, so that the first limiting groove 54 and the second limiting groove 55 are matched to realize the five-position use angle adjustment limiting matching.

Referring to fig. 3, the connection and reinforcement assembly 8 includes a first connection plate 81 fastened to the front and rear ends of the right side of the seat back main body 1 to achieve quick connection and matching, a circular plate section integrally provided at the upper end of the right side of the first connection plate 81, a rotation shaft 82 inserted into the circular plate section at the upper end of the right side of the first connection plate 81 to perform rotation matching, a second connection plate 83 connected to the front side of the rotation shaft 82, the first connection plate 81 and the second connection plate 83 being capable of performing opening and closing movements in cooperation with the rotation shaft 82, a reinforcement member 84 inserted into the left end of the second connection plate 83 to perform connection and reinforcement matching, a sleeve 85 integrally provided at the upper end of the reinforcement member 84 to ensure threaded connection and fastening, a first fastening pin 86 connected to the inside of the sleeve 85 and connected to the seat plate main body 3, a second fastening pin 87 screwed to the middle of the lower end of the reinforcement member 84, and the first fastening pin 86 and the second fastening pin 87 having the same overall structure and being capable of performing threaded connection and movement; the reinforcing member 84 is connected with the seat plate main body 3 through a first fastening nail 86 arranged inside the upper end of the reinforcing member 84, and the lower end of the reinforcing member 84 is connected with the first supporting leg 6 through a second fastening nail 87, so that the reinforcing member 84 is matched with the first fastening nail 86 and the second fastening nail 87 to realize stable reinforcing connection movement.

Referring to fig. 4, the supporting assembly 9 includes a supporting frame 91 rotatably connected to the lower end of the left side of the seat back main body 1 to realize a flat support, a first connecting rod 92 rotatably connected to the front and rear sides of the upper end of the supporting frame 91 for folding, a pin 93 inserted into the middle of the right side of the first connecting rod 92 for connection and matching, a second connecting rod 94 connected to the outer side of the pin 93 for folding and matching, a notch 95 opened at the upper end of the right side of the first connecting rod 92 to realize folding and limiting, a bump 96 clamped inside the notch 95 to realize folding and limiting clamping, the bump 96 connected to the left side of the second connecting rod 94, and the right side of the second connecting rod 94 rotatably connected to the seat back main body 1.

Specifically, the first connecting rod 92, the pin shaft 93, the second connecting rod 94, the notch 95 and the bump 96 are symmetrically arranged from top to bottom and from front to back along the supporting frame 91, and the notch 95 is integrally formed in a rectangular notch shape, so that the notch 95 is guaranteed to realize stable folding and limiting matching activities.

Referring to fig. 5, the lifting assembly 10 includes a leg plate 101 for lifting a leg, a plate disposed inside the leg plate 101 is also arc-shaped, metal channel members 102 disposed at the front and rear ends of the left side of the leg plate 101 and telescopically engaged with each other, a connecting block 103 welded and fixed to the upper end of the right side of the metal channel member 102 for auxiliary connection and engagement, a first protrusion 104 and a second protrusion 105 respectively disposed at the bottom of the left and right sides of the leg plate 101, the first protrusion 104 and the second protrusion 105 are both in a shape of a circular convex block, the first protrusion 104 and the second protrusion 105 can be telescopically engaged with the metal channel member 102, and the metal channel member 102 is fastened and connected to the right side of the seat plate body 3 through the connecting block 103 disposed at the upper end of the right side; the bottom of the right side of the metal groove 102 is provided with a vertical bending part, and the vertical bending part of the metal groove 102 is connected with the front end and the rear end of the left side of the leg plate 101, so that the metal groove 102 can realize the stable telescopic limit matching of the leg plate 101.

The working principle is as follows:

when the folding chair is used, a user can sit on the seat plate main body 3 and lean against the chair back main body 1 oppositely arranged on the left side of the seat plate main body 3 to lean against for rest, and under the stable supporting matching of the first supporting leg 6 and the second supporting leg 7, the firmness of the whole use of the folding chair can be ensured, when the folding chair needs to be folded, the chair back main body 1 is rotatably connected with the armrests 4, the seat plate main body 3 is rotatably connected with the second supporting leg 7, and the chair back main body 1 and the seat plate main body 3 are stably connected in an opening-closing manner through the connecting and reinforcing component 8, so that when the chair back main body 1 is pushed towards the seat plate main body 3 subsequently, the folding chair can realize quick folding movement under the rotating connection and opening-closing connection matching of all internal parts, and when the use angle of the chair back main body 1 needs to be adjusted, the adjusting pieces 5 at the lower end of the right side of the armrests 4 can be moved and adjusted and matched through the armrests 4 oppositely arranged in the front and back side of the right side of the chair back main body 1;

when the armrest 4 drives the adjusting piece main body 51 arranged in the adjusting piece to move upwards, the sliding groove 53 arranged in the middle of the front side of the adjusting piece main body 51, the first limiting groove 54 and the second limiting groove 55 can move upwards synchronously to relieve the clamping state of the first limiting groove 54 or the second limiting groove 55 with the upper ends of the first supporting leg 6 and the second supporting leg 7, then the armrest 4 is pulled forwards or pushed backwards to drive the chair back main body 1 to adjust forwards and backwards under the guiding coordination of the sliding groove 53 arranged in the middle of the front side of the adjusting piece main body 51 by the armrest 4, when the chair back main body is adjusted to a proper position, the armrest 4 can be pushed downwards to make the adjusting piece main body 51 move downwards synchronously, and then the left side and the right side of the sliding groove 53 and the first limiting groove 54 or the second limiting groove 55 arranged in the middle of the upper end can be clamped with the upper ends of the first supporting leg 6 and the second supporting leg 7 again to realize angle adjustment limiting locking movement, so as to ensure the stability of the chair back main body 1 after adjustment, the chair back main body 1, the first supporting leg 3, the first supporting leg 6 and the second supporting leg 7 can ensure stable supporting state, and the subsequent stable rest of the chair back adjustment, and the fifth adjusting seat plate can be used for the fifth folding chair, thereby realizing the advantage that the fifth folding chair back of the limiting groove 55 can be used;

in order to ensure that the second supporting leg 6 is firmly connected with the seat plate main body 7 and is not easy to reduce after the chair back main body 1 and the seat plate main body 3 are folded for a plurality of times, the connecting and reinforcing device 8 is arranged at the position opposite to the chair back main body 1 and the seat plate main body 3, namely, the first connecting sheet 81 and the second connecting sheet 83 are respectively and fixedly connected with the front end and the rear end of the right side of the chair back main body 1 and the front end and the rear end of the left side of the seat plate main body 3, the rotating connection activity of the first connecting sheet 81 and the second connecting sheet 83 is realized through the rotating shaft 82, the subsequent folding activity of the chair back main body 1 and the seat plate main body 3 can be ensured for a plurality of times, the loosening phenomenon is avoided, then the reinforcing member 84 is inserted in the middle part of the left side of the second connecting sheet 83, the sleeve 85 at the upper end of the reinforcing member 84 is sleeved with the front side and the rear side of the left end of the seat plate main body 3, then the fastening activity is realized through the first fastening nail 86, and then the second fastening nail 87 is realized that the lower end of the reinforcing member 84 is fixedly connected with the first supporting leg 6, and the connecting and reinforcing component 8 can be quickly connected and used;

the connecting and reinforcing components 8 are arranged at the front and rear sides, and after the connecting and mounting activities are completed, the reinforcing and matching activities can be realized in the folding and matching process of the seat plate main body 1 and the first supporting legs 6, so that the phenomenon that the seat plate main body 3 is not easy to loosen after being folded for multiple times is avoided, the connecting and reinforcing components 8 can also enhance the stability of the folding chair after being integrally folded, and the abrasion of parts of the folding chair is reduced, thereby achieving the advantages of auxiliary connecting and reinforcing at the joint of the folding chair and the abrasion of deceleration folding parts;

when the folding chair is used in a lying and folding mode, in order to avoid the situation that the bottom of the chair back main body 1 is lack of a support part and is easy to topple over, the support assembly 9 is arranged at the lower end of the left side of the chair back main body 1, namely, after the chair back main body 1 is folded in a lying and folding mode, the support frame 91 arranged in the support assembly 9 can be pulled towards the outer side, the support frame 91 can be unfolded clockwise along the lower end of the left side of the chair back main body 1 to perform pre-support activity, after the support frame 91 is unfolded, the first connecting rod 92 and the second connecting rod 94 respectively arranged at the front middle part and the rear middle part of the upper end of the support frame 91 can be pulled downwards, the second connecting rod 94 can be pulled under the downward pulling force, the convex block 96 integrally arranged at the left side can be moved into the notch 95 formed in the upper end of the right side of the first connecting rod 92, the limit locking of the unfolded state of the support frame can be realized, the chair back main body 1 can be adjusted in a lying mode, and when the chair back main body 1 leans against in a lying and performs lying activity in a lying mode, the folding mode, the limit locking support frame 91 can be realized to be firmly supported and matched with the chair back, and toppling over can be avoided, so that the chair back phenomenon is easy to be toppled over, and the advantage of the back main body 1 can be realized;

in order to further enhance the usability of the folding chair, the lower end of the right side of the seat plate main body 3 is provided with the lifting component 10 to lift and loosen the legs of the user, namely, the leg plate 101 is pulled forwards, the front end and the rear end of the left side of the leg plate 101 are connected with the metal groove part 102 for guiding and matching, the leg plate 101 is stably moved out and lifted for use, the two first bulges 104 arranged at the bottom of the left end of the leg plate 101 can be matched with the bent part arranged on the metal groove part 102 to realize the movement-out limiting activity, so that the leg plate 101 is stably moved out and lifted for use, when the leg plate 101 is collected along the metal groove part 102, the leg plate 101 can be matched with the two second bulges 105 arranged at the bottom of the right side to realize the collection limiting activity, and therefore, the advantage of assisting in lifting and loosening of the legs of the user is achieved.

The utility model provides a folding chair, through having set up regulating part 5 at handrail right side lower extreme, five fender regulation activities are realized to folding chair, reinforce subassembly 8 through having set up the connection, under the inside connecting element cooperation of establishing of connection reinforcement subassembly 8, can realize folding chair wholly folding stable, thereby the folding chair junction auxiliary connection reinforcement has been reached, the advantage of the wearing and tearing of folding spare part of speed reduction, and 1 left side lower extreme of the back of the chair has set up supporting component 9, under notch 95 and the spacing locking of lug 96, support frame 91 can keep the stable support state, thereby the advantage of the back of the chair main part 1 flat folding back auxiliary stable support of lying has been reached, and under the subassembly 10 cooperation of lifting was established to 3 right sides lower extremes of seat plate main part, can realize the auxiliary lifting of user's shank, thereby the advantage that the supplementary lifting of user's shank was relaxed has been reached.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. A folding chair comprises a chair back main body (1), wherein a headrest (2) is arranged at the upper end of the left side of the chair back main body (1), a seat board main body (3) is oppositely arranged at the right side of the chair back main body (1), the front end and the rear end of the right side of the chair back main body (1) are rotatably connected with armrests (4), an adjusting piece (5) is arranged in the middle of the lower end of the right side of the armrests (4), the inside of the adjusting piece (5) is clamped with the upper ends of first supporting legs (6) and second supporting legs (7), the middle parts of the first supporting legs (6) and the second supporting legs (7) are respectively connected with the chair back main body (1) and the seat board main body (3), and the middle parts of the upper ends of the first supporting legs (6) and the second supporting legs (7) are connected;

the method is characterized in that: the chair back fixing device is characterized by further comprising a connecting and reinforcing component (8) arranged at the position, opposite to the seat plate main body (3), of the chair back main body (1), a supporting component (9) arranged at the lower end of the left side of the chair back main body (1) and a lifting component (10) arranged at the lower end of the right side of the seat plate main body (3), wherein the connecting and reinforcing component (8) comprises a first connecting piece (81) fastened at the front end and the rear end of the right side of the chair back main body (1), a rotating shaft (82) inserted at the upper end of the right side of the first connecting piece (81), a second connecting piece (83) connected at the front side of the rotating shaft (82), a reinforcing piece (84) connected at the left side of the second connecting piece (83), a sleeve (85) integrally arranged at the upper end of the reinforcing piece (84), a first fastening nail (86) arranged inside the sleeve (85) and a second fastening nail (87) arranged at the middle part of the lower end of the reinforcing piece (84).

2. The folding chair as claimed in claim 1, wherein: regulating part (5) include regulating blade main part (51), offer connecting hole (52) in regulating blade main part (51) upper end, offer spout (53) in regulating blade main part (51) front side middle part, locate spout (53) left and right sides first spacing groove (54) and locate spout (53) middle part upper end second spacing groove (55) relatively, regulating blade main part (51) are through connecting hole (52) and handrail (4) right side lower extreme bottom fastening connection.

3. A folding chair as claimed in claim 2, wherein: the adjusting sheet main body (51), the connecting hole (52), the sliding groove (53), the first limiting groove (54) and the second limiting groove (55) are symmetrically arranged front and back along the chair back main body (1), and the first limiting groove (54) and the second limiting groove (55) are communicated with the sliding groove (53).

4. The folding chair as claimed in claim 1, wherein: the reinforcing member (84) is connected with the seat plate main body (3) through a first fastening nail (86) arranged inside the upper end of the reinforcing member, and the lower end of the reinforcing member (84) is connected with the first supporting leg (6) through a second fastening nail (87).

5. The folding chair as claimed in claim 1, wherein: support assembly (9) including rotate connect in back of the chair main part (1) left side lower extreme support frame (91), locate support frame (91) upper end front and back both sides first connecting rod (92), peg graft in round pin axle (93) on first connecting rod (92) right side, locate round pin axle (93) outside second connecting rod (94), set up in notch (95) of first connecting rod (92) right side upper end and joint in notch (95) inside lug (96), lug (96) meet with second connecting rod (94) left side to second connecting rod (94) right side and back of the chair main part (1) rotate to be connected.

6. The folding chair as claimed in claim 5, wherein: the first connecting rod (92), the pin shaft (93), the second connecting rod (94), the notch (95) and the bump (96) are symmetrically arranged from top to bottom and from front to back along the supporting frame (91), and the notch (95) is integrally formed in a rectangular notch shape.

7. The folding chair as claimed in claim 1, wherein: the lifting assembly (10) comprises a leg plate (101), metal groove pieces (102) arranged at the front end and the rear end of the left side of the leg plate (101), connecting blocks (103) fixedly arranged at the upper end of the right side of the metal groove pieces (102), and first protrusions (104) and second protrusions (105) respectively arranged at the bottoms of the left side and the right side of the leg plate (101), wherein the metal groove pieces (102) are fixedly connected with the right side of the seat plate main body (3) through the connecting blocks (103) arranged at the upper end of the right side.

8. The folding chair as claimed in claim 7, wherein: the bottom of the right side of the metal groove piece (102) is provided with a vertical bending part, and the vertical bending part of the metal groove piece (102) is connected with the front end and the rear end of the left side of the leg plate (101).

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