CN106617844A

CN106617844A - Folding chair

Info

Publication number: CN106617844A
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: 2017-05-10
Anticipated expiration: 2036-11-14
Also published as: CN106617844B

Abstract

The invention discloses a folding chair. The folding chair comprises a first support leg frame, a second support leg frame, a sliding part, a seat and a limiting mechanism, wherein the first support leg frame and the second support leg frame are arranged in a crossing manner and are rotatably connected; the sliding part is arranged on the second support leg frame and can move along the second support leg frame; the chair is in movable connection with the first support leg frame and the sliding part; and the limiting mechanism is used for limiting the movement of the sliding part on the second support leg frame. For the folding chair provided by the invention, the folding method adopts the vertical folding manner, so that the seat does not need to be folded, then a material for making the seat is not limited to the materials such as soft cloth, while an iron stand can be adopted and soft leather is paved on the iron stand, and compared with the traditional folding chair, the folding chair provided by the invention has the advantage that the depressed deformation of the seat can be alleviated.

Description

Foldable chair

Technical field

The present invention relates to a kind of chair, more particularly, to a kind of foldable chair.

Background technology

Traditional foldable chair is that, by the two lateral middle foldable chairs for being folded, the seat of such foldable chair is necessary For materials such as soft cloths.However, after use time length, the bad phenomenon such as soft cloth seat is susceptible to be recessed, deforms.

The content of the invention

Based on this, the invention reside in overcoming the defect of prior art, there is provided one kind can slow down seat depressed deformation phenomenon Foldable chair.

Its technical scheme is as follows：Foldable chair, including：First supporting rack and the second supporting rack, first supporting rack with Second supporting rack is arranged in a crossed manner and is rotatably connected；Sliding part, the sliding part is installed on second supporting rack, And can move along second supporting rack；Seat support, the seat support is with first supporting rack, sliding part activity even Connect；And position-limit mechanism, the position-limit mechanism is used to limit the sliding part and move on second supporting rack.

Wherein in one embodiment, first supporting rack includes first support bar, second support bar and first crossbeam, The first support bar is set up in parallel with the second support bar, and the first support bar is with the second support bar by described First crossbeam is connected；Second supporting rack includes the 3rd support bar, the 4th support bar and second cross beam, the 3rd support bar It is set up in parallel with the 4th support bar, the 3rd support bar is connected with the 4th support bar by the second cross beam, 3rd support bar is arranged in a crossed manner with the first support bar and is rotatably connected, the 4th support bar and described second Support bar is arranged in a crossed manner and is rotatably connected；The sliding part includes the first sliding part and the second sliding part, and described first slides Part is installed on the 3rd support bar and can move along the 3rd support bar, and second sliding part is installed in institute State on the 4th support bar and can move along the 4th support bar；The seat support and the first support bar, described second Support bar, first sliding part and second sliding part are flexibly connected；The position-limit mechanism is used to limit described first Sliding part is moved on the 3rd support bar, and is moved on the 4th support bar for limiting second sliding part It is dynamic.

Wherein in one embodiment, the position-limit mechanism include the first plate, the second plate, the first locating part, second Locating part, the first impeller, the second impeller, first step up block and second and step up block；First plate is slided with described first Moving part is rotatably connected, and first locating part is connected with the 3rd support bar, and first plate is provided with for accommodating State the first recess of the first locating part, described first steps up block is slidably matched with first plate, first impeller with Described first steps up block is connected, and described first steps up block for contradicting first locating part so that first locating part is spacing In first recess；

Second plate is rotatably connected with second sliding part, second locating part and the 4th support bar It is connected, second plate is provided with the second recess for accommodating second locating part, described second steps up block with described the Two plates are slidably matched, and second impeller steps up block and is connected with described second, and described second to step up block described for contradicting Second locating part is so that second locating part is limited in second recess.

Wherein in one embodiment, the position-limit mechanism also includes the 3rd crossbeam, first impeller and described the Two impellers are connected by the 3rd crossbeam.

Wherein in one embodiment, first plate is provided with side by side the first strip shape gob and the second strip shape gob, and described One strip shape gob is connected with first recess, and second plate is set side by side with Article 3 shape mouth and Article 4 shape mouth, institute State Article 3 shape mouth to be connected with second recess；Described first steps up block, first locating part can be along described One strip shape gob is moved, and described second steps up block, second locating part can move along the Article 3 shape mouth；Described 3rd Crossbeam one end is connected by second strip shape gob with first plate, and the 3rd crossbeam other end is by the Article 4 Shape mouth is connected with second plate, and the 3rd crossbeam can be moved along the Article 3 shape mouth, the Article 4 shape mouth It is dynamic.

Wherein in one embodiment, first plate is provided with the first fairlead, and first impeller includes first Guide post, first guide post is fitted into first fairlead and is slidably matched with first fairlead；Described second Plate is provided with the second fairlead, and second impeller includes the second guide post, and second guide post loads described second leads It is slidably matched in set and with second fairlead.

Wherein in one embodiment, the foldable chair also includes the first torsion spring and the second torsion spring；First plate Be provided with the first alignment pin, first torsion spring is set on first alignment pin, and one end of first torsion spring with it is described First sliding part is contradicted, and the other end of first torsion spring is inconsistent with first plate；Second plate is provided with second Alignment pin, second torsion spring is set on second alignment pin, and one end of second torsion spring is slided with described second Part is contradicted, and the other end of second torsion spring is inconsistent with second plate.

Wherein in one embodiment, the foldable chair also includes the first handrail and the second handrail, first handrail The first pillar is connected with, second handrail is connected with the second pillar, and first pillar slides with the first support bar and matches somebody with somebody Close, second pillar is slidably matched with the second support bar.

Wherein in one embodiment, first handrail is rotatably connected with first pillar, second handrail It is rotatably connected with second pillar.

Wherein in one embodiment, the foldable chair also includes the chair back, front wheel and rear roller, the chair back and institute State seat to be rotatably connected；The first supporting rack bottom is connected with the rear roller, and the second supporting rack bottom is connected with The front wheel.

Principle of the invention, effect are further illustrated with reference to above-mentioned technical proposal：

1st, above-mentioned foldable chair, during use state, can be limited in the second supporting rack by position-limit mechanism by sliding part On, so just enable to seat support and be fixed on the first supporting rack and the second supporting rack；During folded state, position-limit mechanism will not be sliding Moving part is limited on the second supporting rack, and sliding part just can be moved along the second supporting rack, so as to the first supporting rack and second Leg support can be relatively rotated and folded.So visible, the folding mode of the foldable chair of the present embodiment is upper and lower folding mode, chair Toilet need not be folded, and the material of such seat support need not be limited to the materials such as soft cloth, and be can be using brandreth and laid bullet Property cortex, relative to traditional foldable chair, just can slow down seat depressed deformation phenomenon.

2nd, when the first locating part is located at the first recess, first is promoted to step up block by the first impeller, first steps up block The first locating part can be contradicted makes the first locating part be limited in the first recess, and now the first sliding part is just limited in the 3rd support Bar.Promote first to step up block again by the first impeller, make first to step up block and unclamp the first locating part, the first locating part just can Enough to remove from the first recess, now the first sliding part just can be moved along the 3rd support bar, just can carry out the 3rd support Folding operation between bar and first support bar.When the second locating part is located at the second recess, by the second impeller the is promoted Two step up block, and second steps up block can contradict the second locating part makes the second locating part be limited in the second recess, now second slide Moving part is just limited in the 4th support bar.Promote second to step up block again by the second impeller, make second to step up block and unclamp second Locating part, the second locating part just can be removed from the second recess, and now the second sliding part just can be moved along the 4th support bar It is dynamic, just can carry out the folding operation between the 4th support bar and second support bar.So visible, position-limit mechanism can be easy to reality Whether existing first sliding part is limited in the 3rd support bar, and whether the second sliding part is limited in the 4th support bar, is easy to chair Folded state is converted to by use state.

Description of the drawings

Fig. 1 is the rough schematic view one of the foldable chair use state described in the embodiment of the present invention；

Fig. 2 is the rough schematic view two of the foldable chair folded state described in the embodiment of the present invention；

Fig. 3 steps up showing when block contradicts state with the first locating part in the foldable chair described in the embodiment of the present invention first It is intended to；

Partial schematic diagram when Fig. 4 steps up block and the first locating part conflict state in Fig. 3 first；

Fig. 5 steps up signal when block is separated with the first locating part in the foldable chair described in the embodiment of the present invention first Figure；

Fig. 6 is the first partial schematic diagram for stepping up when block is separated with the first locating part in Fig. 5；

Fig. 7 removes schematic diagram during the first recess for the first locating part in the foldable chair described in the embodiment of the present invention；

Overall structure diagram when Fig. 8 is the foldable chair use state described in the embodiment of the present invention；

Fig. 9 is that the chair back of the foldable chair described in the embodiment of the present invention carries out the schematic diagram after upset folding；

Figure 10 is the schematic diagram that the first pillar of the foldable chair described in the embodiment of the present invention loads first support bar；

When Figure 11 is the first supporting rack of the foldable chair described in the embodiment of the present invention, the second supporting rack preparation rotary folding View；

Figure 12 is the shape after the first supporting rack, the second supporting rack rotary folding of the foldable chair described in the embodiment of the present invention State schematic diagram；

State after Figure 13 is the first handrail of the foldable chair described in the embodiment of the present invention, the second handrail is turned folding is shown It is intended to；

Figure 14 is that the state that the expansion link of the foldable chair described in the embodiment of the present invention is shunk after driving anti-tip wheel to fold is shown It is intended to.

Description of reference numerals：

10th, the first supporting rack, 11, first support bar, the 20, second supporting rack, the 21, the 3rd support bar, 30, sliding part, 31, First sliding part, the 32, second sliding part, 40, seat support, 50, position-limit mechanism, the 51, first plate, the 511, first recess, 512, One strip shape gob, the 513, second strip shape gob, the 514, first fairlead, the 52, second plate, the 521, second recess, 522, Article 3 shape Mouthful, 523, Article 4 shape mouth, the 524, second fairlead, the 525, second alignment pin, the 53, first locating part, the 54, second locating part, 55th, the first impeller, the 551, first guide post, the 56, second impeller, the 561, second guide post, 57, first steps up block, and 58, Two step up block, the 59, the 3rd crossbeam, the 61, first torsion spring, the 62, second torsion spring, the 71, first handrail, the 72, second handrail, and 73, first Pillar, the 74, second pillar, 80, the chair back, 91, front wheel, 92, rear roller, 93, expansion link, 94, anti-tip wheel.

Specific embodiment

Embodiments of the invention are described in detail below：

As shown in Figure 1, 2, the foldable chair described in the embodiment of the present invention, including：First supporting rack 10, the second supporting rack 20th, sliding part 30, seat support 40 and position-limit mechanism 50.First supporting rack 10 it is arranged in a crossed manner with second supporting rack 20 and It is rotatably connected.The sliding part 30 is installed on second supporting rack 20 and can move along second supporting rack 20 It is dynamic.The seat support 40 is flexibly connected with first supporting rack 10, the sliding part 30.The position-limit mechanism 50 is used to limit institute State sliding part 30 to move on second supporting rack 20.

Above-mentioned foldable chair, during use state, can be limited in the second supporting leg by position-limit mechanism 50 by sliding part 30 On frame 20, so just enable to seat support 40 and be fixed on the first supporting rack 10 and the second supporting rack 20；It is spacing during folded state Mechanism 50 is not limited in sliding part 30 on second supporting rack 20, and sliding part 30 just can be moved along the second supporting rack 20, from And the first supporting rack 10 can be relatively rotated with the second supporting rack 20 and folded.It is so visible, the foldable chair of the present embodiment Folding mode is upper and lower folding mode, and seat support 40 just need not be folded, and the material of such seat support 40 need not be limited to soft cloth etc. Material, and can be using brandreth and lay elastic cortex, relative to traditional foldable chair, just can slow down seat depression and become Shape phenomenon.

Fig. 3-7 are referred to, first supporting rack 10 includes first support bar 11, second support bar and first crossbeam.Institute State first support bar 11 to be set up in parallel with the second support bar, the first support bar 11 passes through institute with the second support bar State first crossbeam to be connected.Second supporting rack 20 includes the 3rd support bar 21, the 4th support bar and second cross beam.Described 3rd Support bar 21 is set up in parallel with the 4th support bar, and the 3rd support bar 21 passes through described second with the 4th support bar Crossbeam is connected.3rd support bar 21 is arranged in a crossed manner with the first support bar 11 and is rotatably connected, and the described 4th supports Bar is arranged in a crossed manner with the second support bar and is rotatably connected.The sliding part 30 includes that the first sliding part 31 and second is slided Moving part 32.First sliding part 31 is installed on the 3rd support bar 21 and can move along the 3rd support bar 21 It is dynamic.Second sliding part 32 is installed on the 4th support bar and can move along the 4th support bar.This enforcement In example, the first sliding part 31, the second sliding part 32 using the first sliding sleeve and the second sliding sleeve, and the first sliding sleeve, second can be slided Set is respectively sleeved on the 3rd support bar 21, the 4th support bar, and by promoting the first sliding sleeve, the second sliding sleeve the first cunning just can be made Set, the second sliding sleeve can be moved respectively along the 3rd support bar 21, the 4th support bar, so as to just carry out folding operation.

The seat support 40 and the first support bar 11, the second support bar, first sliding part 31 and described Two sliding parts 32 are flexibly connected.In the present embodiment, seat support 40 and first support bar 11, second support bar, the first sliding part 31 And second sliding part 32 rotation connected mode is taken by bearing pin and pin-and-hole, during the use of such seat support 40, be not easy to rock, Stability is preferable.

The position-limit mechanism 50 is moved for limiting first sliding part 31 on the 3rd support bar 21, Yi Jiyong Move on the 4th support bar in second sliding part 32 is limited.By position-limit mechanism 50 by the first sliding part 31, Two sliding parts 32 are respectively limited by after the 3rd support bar 21, the 4th support bar, just can avoid the first sliding sleeve, the second sliding sleeve difference Move along the 3rd support bar 21, the 4th support bar, so that the position of seat support 40 is fixed, just may be used.

Refer to Fig. 4 and Fig. 6, the position-limit mechanism 50 include the first plate 51, the second plate 52, the first locating part 53, Second locating part 54, the first impeller 55, the second impeller 56, first step up block 57 and second and step up block 58.

First plate 51 is rotatably connected with first sliding part 31.First locating part 53 and the described 3rd Support bar 21 is connected, and first plate 51 is provided with the first recess 511 for accommodating first locating part 53.Described first Step up block 57 to be slidably matched with first plate 51, first impeller 55 steps up block 57 and is connected with described first.It is described First steps up block 57 for contradicting first locating part 53 so that first locating part 53 is limited in first recess 511 In.When the first locating part 53 is located at the first recess 511, first is promoted to step up block 57 by the first impeller 55, first steps up Block 57 can contradict the first locating part 53 makes the first locating part 53 be limited in the first recess 511 (as shown in Figure 3, Figure 4), this When, the first sliding part 31 is just limited in the 3rd support bar 21.Promote first to step up block 57 again by the first impeller 55, make One steps up block 57 unclamps the first locating part 53 (such as Fig. 5, Fig. 6), and the first locating part 53 just can be removed from the first recess 511 (Fig. 7 illustrates the state diagram after the first locating part 53 is removed from the first recess 511), now, the first sliding part 31 just may be used To move along the 3rd support bar 21, the folding operation between the 3rd support bar 21 and first support bar 11 just can be carried out.

Second plate 52 is rotatably connected with second sliding part 32.Second locating part 54 and the described 4th Support bar is connected, and second plate 52 is provided with the second recess 521 for accommodating second locating part 54.Described second adds Tight block 58 is slidably matched with second plate 52, and second impeller 56 steps up block 58 and is connected with described second.Described Two step up block 58 for contradicting second locating part 54 so that second locating part 54 is limited in second recess 521 In.In the same manner, when the second locating part 54 is located at the second recess 521, second is promoted to step up block 58 by the second impeller 56, second Step up block 58 and can contradict the second locating part 54 the second locating part 54 is limited in the second recess 521, now, the second sliding part 32 are just limited in the 4th support bar.Promote second to step up block 58 again by the second impeller 56, make second to step up block 58 and unclamp Second locating part 54, the second locating part 54 just can be removed from the second recess 521, and now, the second sliding part 32 just can edge The movement of the 4th support bar, the folding operation between the 4th support bar and second support bar just can be carried out.

The position-limit mechanism 50 also includes the 3rd crossbeam 59.First impeller 55 passes through with second impeller 56 3rd crossbeam 59 is connected.3rd crossbeam 59 enables to the first impeller 55 and the second impeller 56 while carrying out push-and-pull behaviour Make, using more convenient.

First plate 51 is provided with side by side the first strip shape gob 512 and the second strip shape gob 513.First strip shape gob 512 It is connected with first recess 511.Second plate 52 is set side by side with Article 3 shape mouth 522 and Article 4 shape mouth 523. The Article 3 shape mouth 522 is connected with second recess 521.Described first steps up block 57, the energy of the first locating part 53 It is enough to move along first strip shape gob 512.Described second steps up block 58, second locating part 54 can be along the described 3rd Strip shape gob 522 is moved.

Described one end of 3rd crossbeam 59 is connected by second strip shape gob 513 with first plate 51, and the described 3rd The other end of crossbeam 59 is connected by the Article 4 shape mouth 523 with second plate 52, and the 3rd crossbeam 59 being capable of edge The Article 3 shape mouth 522, the Article 4 shape mouth 523 to move.

First plate 51 is provided with the first fairlead 514.First impeller 55 includes the first guide post 551.Institute State the first guide post 551 to be fitted into first fairlead 514 and be slidably matched with first fairlead 514.Described second Plate 52 is provided with the second fairlead 524.Second impeller 56 includes the second guide post 561.Second guide post 561 is filled Enter in second fairlead 524 and be slidably matched with second fairlead 524.Thus, by the first fairlead 514, the Two fairleads 524 play respectively guide effect to the first guide post 551, the second guide post 561, and the 3rd crossbeam 59 is by the Two strip shape gobs 513, Article 4 shape mouth 523 carry out guide effect, and mobile first can be easy to step up block 57, second step up block 58, make First step up block 57, second step up block 58 contradict respectively the first locating part 53, the second locating part 54 or with the first locating part 53, Second locating part 54 is separated, and structural stability is preferable.

The foldable chair also includes the first torsion spring 61 and the second torsion spring 62.First plate 51 is provided with the first positioning Pin.First torsion spring 61 is set on first alignment pin, and one end of first torsion spring 61 is slided with described first Part 31 is contradicted, and the other end of first torsion spring 61 is inconsistent with first plate 51.Second plate 52 is provided with second Alignment pin 525.Second torsion spring 62 is set on second alignment pin 525, and one end and the institute of second torsion spring 62 State the second sliding part 32 to contradict, the other end of second torsion spring 62 is inconsistent with second plate 52.Thus, the first torsion spring 61 enable to the first plate 51 compresses the first locating part 53, and it is spacing that the second torsion spring 62 enables to the compression second of the second plate 52 Part 54.

Refer to Fig. 8-14, Fig. 8 to Figure 14 illustrate foldable chair from use state when progressively folded turning shift to completely Folded state after folding.The foldable chair also includes the first handrail 71 and the second handrail 72.First handrail 71 connects There is the first pillar 73, second handrail 72 is connected with the second pillar 74.First pillar 73 and the first support bar 11 It is slidably matched, second pillar 74 is slidably matched with the second support bar.In the present embodiment, the first support bar 11 Be sleeve pipe with the second support bar, the first pillar 73, the second pillar 74 can be fitted into sleeve pipe, and the first pillar 73, Two pillars 74 can be moved along sleeve pipe, and the length of sleeve pipe is stretched out in by adjusting the first pillar 73, the second pillar 74, just can be with The height (as shown in Figure 9 and Figure 10) of the first handrail 71, the second handrail 72 relative to seat support 40 is adjusted, the folding of chair is convenient for It is folded.

First handrail 71 is rotatably connected with first pillar 73.Second handrail 72 and second pillar 74 are rotatably connected.So, chair after folding, rotates the first handrail 71, the second handrail 72, helps the first handrail 71, second Hand 72 just can reduce accounting for after chair is folded respectively close to the first pillar 73, the second pillar 74 (as shown in Figure 12 and Figure 13) Use space.

The foldable chair also includes the chair back 80, front wheel 91 and rear roller 92.The chair back 80 can turn with the seat Dynamic connection.The bottom of first supporting rack 10 is connected with the rear roller 92, and the bottom of the second supporting rack 20 is connected with front rolling Wheel 91.The chair back 80 is rotated, just the chair back 80 and seat support 40 can be folded (as shown in Figure 8 and Figure 9).Wherein, rear roller 92 can be connected with anti-tip wheel 94 by expansion link 93.Expansion link 93 can adjust the length that anti-tip wheel 94 stretches out, and chair is folded Afterwards, can be shunk by expansion link 93 and withdraw anti-tip wheel 94 (as shown in Figure 13 and Figure 14), reduce the occupancy after chair is folded Space.

Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited In contradiction, the scope of this specification record is all considered to be.

Embodiment described above only expresses the several embodiments of the present invention, and its description is more concrete and detailed, but and Can not therefore be construed as limiting the scope of the patent.It should be pointed out that for one of ordinary skill in the art comes Say, without departing from the inventive concept of the premise, some deformations and improvement can also be made, these belong to the protection of the present invention Scope.Therefore, the protection domain of patent of the present invention should be defined by claims.

Claims

1. foldable chair, it is characterised in that include：

First supporting rack and the second supporting rack, first supporting rack is arranged in a crossed manner with second supporting rack and rotatably connects Connect；

Sliding part, the sliding part is installed on second supporting rack and can move along second supporting rack；

Seat support, the seat support is flexibly connected with first supporting rack, the sliding part；And

Position-limit mechanism, the position-limit mechanism is moved for limiting the sliding part on second supporting rack.

2. foldable chair according to claim 1, it is characterised in that

First supporting rack includes first support bar, second support bar and first crossbeam, the first support bar and described the Two support bars are set up in parallel, and the first support bar is connected with the second support bar by the first crossbeam；

Second supporting rack includes the 3rd support bar, the 4th support bar and second cross beam, the 3rd support bar and described the Four support bars are set up in parallel, and the 3rd support bar is connected with the 4th support bar by the second cross beam, and the described 3rd Support bar is arranged in a crossed manner with the first support bar and is rotatably connected, and the 4th support bar is handed over the second support bar Fork is arranged and is rotatably connected；

The sliding part includes the first sliding part and the second sliding part, and first sliding part is installed in the 3rd support bar Go up and can move along the 3rd support bar, second sliding part is installed on the 4th support bar and being capable of edge The 4th support bar movement；

The seat support is equal with the first support bar, the second support bar, first sliding part and second sliding part It is flexibly connected；

The position-limit mechanism is moved for limiting first sliding part on the 3rd support bar, and described for limiting Second sliding part is moved on the 4th support bar.

3. foldable chair according to claim 2, it is characterised in that the position-limit mechanism includes the first plate, the second plate Part, the first locating part, the second locating part, the first impeller, the second impeller, first step up block and second and step up block；

First plate is rotatably connected with first sliding part, first locating part and the 3rd support bar phase Even, first plate is provided with the first recess for accommodating first locating part, and described first steps up block with described first Plate is slidably matched, and first impeller steps up block and is connected with described first, and described first steps up block for contradicting described the One locating part is so that first locating part is limited in first recess；

Second plate is rotatably connected with second sliding part, second locating part and the 4th support bar phase Even, second plate is provided with the second recess for accommodating second locating part, and described second steps up block with described second Plate is slidably matched, and second impeller steps up block and is connected with described second, and described second steps up block for contradicting described the Two locating parts are so that second locating part is limited in second recess.

4. foldable chair according to claim 3, it is characterised in that the position-limit mechanism also includes the 3rd crossbeam, described First impeller is connected with second impeller by the 3rd crossbeam.

5. foldable chair according to claim 4, it is characterised in that first plate be provided with side by side the first strip shape gob with Second strip shape gob, first strip shape gob is connected with first recess, and second plate is set side by side with Article 3 shape Mouth and Article 4 shape mouth, the Article 3 shape mouth is connected with second recess；

Described first steps up block, first locating part can move along first strip shape gob, and described second steps up block, institute Stating the second locating part can move along the Article 3 shape mouth；

Described 3rd crossbeam one end is connected by second strip shape gob with first plate, and the 3rd crossbeam other end leads to Cross the Article 4 shape mouth to be connected with second plate, and the 3rd crossbeam can be along the Article 3 shape mouth, described Article 4 shape mouth is moved.

6. foldable chair according to claim 3, it is characterised in that first plate is provided with the first fairlead, described First impeller includes the first guide post, and first guide post is fitted into first fairlead and is oriented to described first Set is slidably matched；Second plate is provided with the second fairlead, and second impeller includes the second guide post, and described second leads It is fitted into second fairlead to bar and is slidably matched with second fairlead.

7. foldable chair according to claim 3, it is characterised in that also including the first torsion spring and the second torsion spring；Described One plate is provided with the first alignment pin, and first torsion spring is set on first alignment pin, and one end of first torsion spring Contradict with first sliding part, the other end of first torsion spring is inconsistent with first plate；Second plate sets There is the second alignment pin, second torsion spring is set on second alignment pin, and one end of second torsion spring and described Two sliding parts are contradicted, and the other end of second torsion spring is inconsistent with second plate.

8. foldable chair according to claim 2, it is characterised in that also including the first handrail and the second handrail, described One handrail is connected with the first pillar, and second handrail is connected with the second pillar, first pillar and the first support bar It is slidably matched, second pillar is slidably matched with the second support bar.

9. foldable chair according to claim 8, it is characterised in that first handrail is rotatable with first pillar Connection, second handrail is rotatably connected with second pillar.

10. the foldable chair according to any one of claim 1～9, it is characterised in that also including the chair back, front wheel with it is rear Roller, the chair back is rotatably connected with the seat；The first supporting rack bottom is connected with the rear roller, and described second Supporting rack bottom is connected with the front wheel.