CN206576602U - Foldable chair - Google Patents

Abstract

The utility model discloses a kind of foldable chair, including：First supporting rack, the second supporting rack, sliding part, seat support and position-limit mechanism.First supporting rack and second supporting rack are arranged in a crossed manner and are rotatably connected.The sliding part is installed on second supporting rack and can moved along second supporting rack.The seat support is flexibly connected with first supporting rack, the sliding part.The position-limit mechanism is moved for limiting the sliding part on second supporting rack.Above-mentioned foldable chair, folding mode is folding mode up and down, and seat support is just without being folded, so the material of seat support need not be limited to the materials such as soft cloth, but using brandreth and elastic cortex can be laid, relative to traditional foldable chair, seat depressed deformation phenomenon just can be slowed down.

Description

Foldable chair

Technical field

The utility model is related 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 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 easily recessed, deforms.

The content of the invention

Based on this, the utility model is to overcome the defect of prior art can slow down seat depressed deformation there is provided one kind The foldable chair of phenomenon.

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 be moved along second supporting rack；Seat support, the seat support connects with first supporting rack, sliding part activity Connect；And position-limit mechanism, the position-limit mechanism is used to limit the sliding part and move on second supporting rack.

In one of the embodiments, 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 passes through described with the second support bar 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 and the first support bar are arranged in a crossed manner and are 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 moved along the 3rd support bar, and second sliding part is installed in institute State on the 4th support bar and can be moved 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 up for limiting second sliding part in the 4th support bar It is dynamic.

In one of the embodiments, the position-limit mechanism includes 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, which is provided with, to be used to accommodate institute 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, which steps up block, is connected, and described first, which steps up block, is used to contradict 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, which is provided with, is used to accommodating the second recess of second locating part, described second steps up block and described the Two plates are slidably matched, and second impeller steps up block with described second and is connected, described second step up block be used to contradicting it is described Second locating part is so that second locating part is limited in second recess.

In one of the embodiments, the position-limit mechanism also includes the 3rd crossbeam, first impeller and described the Two impellers are connected by the 3rd crossbeam.

In one of the embodiments, first plate is provided with the first strip shape gob and the second strip shape gob, described the side by side One strip shape gob is connected with first recess, and second plate is set side by side with Article 3 shape mouthful and Article 4 shape mouthful, institute Article 3 shape mouthful is stated with second recess to be connected；Described first steps up block, first locating part can be along described One strip shape gob is moved, and described second, which steps up block, second locating part, to be moved along the Article 3 shape mouthful；Described 3rd Crossbeam one end is connected by second strip shape gob with first plate, and the 3rd crossbeam other end passes through the Article 4 Shape mouthful is connected with second plate, and the 3rd crossbeam can be moved along the Article 3 shape mouthful, the Article 4 shape mouthful It is dynamic.

In one of the embodiments, first plate is provided with the first guide sleeve, and first impeller includes first Guide rod, first guide rod is fitted into first guide sleeve and is slidably matched with first guide sleeve；Described second Plate is provided with the second guide sleeve, and second impeller includes the second guide rod, and second guide rod, which loads described second, leads It is slidably matched into set and with second guide sleeve.

In one of the embodiments, the foldable chair also includes the first torsion spring and the second torsion spring；First plate 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 and first plate are inconsistent；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 and second plate are inconsistent.

In one of the embodiments, 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 is slided with the first support bar matches somebody with somebody Close, second pillar is slidably matched with the second support bar.

In one of the embodiments, first handrail is rotatably connected with first pillar, second handrail It is rotatably connected with second pillar.

In one of the embodiments, the foldable chair also includes the chair back, front wheel and rear roller, the chair back and institute Seat support is stated 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 present utility model, effect are further illustrated with reference to above-mentioned technical proposal：

1st, above-mentioned foldable chair, during use state, by sliding part can be limited in the second supporting rack by position-limit mechanism On, so just enable to seat support to 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 that 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 folding mode, chair up and down Toilet is without being folded, and the material of such seat support need not be limited to the materials such as soft cloth, but using brandreth and can lay 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, which 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 be removed 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, the is promoted by the second impeller Two step up block, and second, which steps up block, which 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, it 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.

Brief description of the drawings

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

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

When Fig. 3 steps up block and the first locating part conflict state in the foldable chair described in the utility model embodiment first Schematic diagram；

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

Fig. 5 steps up showing when block is separated with the first locating part in the foldable chair described in the utility model embodiment first It is intended to；

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

Fig. 7 removes signal during the first recess for the first locating part in the foldable chair described in the utility model embodiment Figure；

Overall structure diagram when Fig. 8 is the foldable chair use state described in the utility model embodiment；

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

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

Figure 11 is the first supporting rack of the foldable chair described in the utility model embodiment, the second supporting rack preparation rotary folding View when folded；

Figure 12 is the first supporting rack of foldable chair described in the utility model embodiment, after the second supporting rack rotary folding View；

Figure 13 be the utility model embodiment described in foldable chair the first handrail, the second handrail turn folding after shape State schematic diagram；

Figure 14 is that the expansion link of the foldable chair described in the utility model embodiment shrinks the shape driven after anti-tip wheel folding State schematic diagram.

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 guide sleeve, the 52, second plate, the 521, second recess, 522, Article 3 shape Mouthful, 523, Article 4 shape mouthful, the 524, second guide sleeve, the 525, second alignment pin, the 53, first locating part, the 54, second locating part, 55th, the first impeller, the 551, first guide rod, the 56, second impeller, the 561, second guide rod, 57, first steps up block, 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, 73, first Pillar, the 74, second pillar, 80, the chair back, 91, front wheel, 92, rear roller, 93, expansion link, 94, anti-tip wheel.

Embodiment

Embodiment of the present utility model is described in detail below：

As shown in Figure 1, 2, the foldable chair described in the utility model embodiment, including：First supporting rack 10, the second supporting leg Frame 20, sliding part 30, seat support 40 and position-limit mechanism 50.First supporting rack 10 and second supporting rack 20 be arranged in a crossed manner, And be rotatably connected.The sliding part 30 is installed on second supporting rack 20 and can be along second supporting rack 20 It is mobile.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 The sliding part 30 is moved on second supporting rack 20.

Above-mentioned foldable chair, during use state, by sliding part 30 can be limited in the second supporting leg by position-limit mechanism 50 On frame 20, seat support 40 is so just enabled to be fixed on the first supporting rack 10 and the second supporting rack 20；It is spacing during folded state Sliding part 30 is not limited on the second supporting rack 20 by mechanism 50, 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 folding mode up and down, and seat support 40 is just without being folded, and the material of such seat support 40 need not be limited to soft cloth etc. Material, but using brandreth and elastic cortex can be laid, relative to traditional foldable chair, seat depression change just can be slowed down 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 First crossbeam is stated 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 and the first support bar 11 are arranged in a crossed manner and are rotatably connected, the 4th support Bar and the second support bar are arranged in a crossed manner and are rotatably connected.The sliding part 30 includes the first sliding part 31 and second and slided Moving part 32.First sliding part 31 is installed on the 3rd support bar 21 and can moved along the 3rd support bar 21 It is dynamic.Second sliding part 32 is installed on the 4th support bar and can moved along the 4th support bar.This implementation In example, the first sliding part 31, the second sliding part 32 can use the first sliding sleeve and the second sliding sleeve, and the first sliding sleeve, second are slided Set is respectively sleeved at the 3rd support bar 21, on the 4th support bar, by promoting the first sliding sleeve, the second sliding sleeve just can make the first cunning Set, the second sliding sleeve can be moved respectively along the 3rd support bar 21, the 4th support bar, so that folding operation just can be carried out.

The seat support 40 and the first support bar 11, the second support bar, first sliding part 31 and described the 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 such use of 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 Moved in limiting second sliding part 32 on the 4th support bar.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, so that the position of seat support 40 is fixed, just may be used along the 3rd support bar 21, the 4th support bar.

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 being used 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 with described first and is connected.It is described First, which steps up block 57, is used to contradict first locating part 53 so that first locating part 53 is limited in first recess In 511.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 adds Tight block 57, which 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, which 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 be moved 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 being used 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 with described second and is connected.Described Two, which step up block 58, is used to contradict second locating part 54 so that second locating part 54 is limited in second recess 521 In.Similarly, when the second locating part 54 is located at the second recess 521, second is promoted to step up block 58, second by the second impeller 56 Step up block 58 and can contradict the second locating part 54 to make the second locating part 54 be 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 the first strip shape gob 512 and the second strip shape gob 513 side by side.First strip shape gob 512 It is connected with first recess 511.Second plate 52 is set side by side with Article 3 shape mouthful 522 and Article 4 shape mouthful 523. The Article 3 shape mouthful 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 be moved 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 mouthful 523 with second plate 52, and the 3rd crossbeam 59 being capable of edge The Article 3 shape mouthful 522, the Article 4 shape mouthful 523 to move.

First plate 51 is provided with the first guide sleeve 514.First impeller 55 includes the first guide rod 551.Institute The first guide rod 551 is stated to be fitted into first guide sleeve 514 and be slidably matched with first guide sleeve 514.Described second Plate 52 is provided with the second guide sleeve 524.Second impeller 56 includes the second guide rod 561.Second guide rod 561 is filled Enter in second guide sleeve 524 and be slidably matched with second guide sleeve 524.In this way, passing through the first guide sleeve 514, Two guide sleeves 524 play guide effect to the first guide rod 551, the second guide rod 561 respectively, and the 3rd crossbeam 59 passes through Two strip shape gobs 513, Article 4 shape mouthfuls 523 carries out guide effect, and mobile first can be easy to step up block 57, second step up block 58, made 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 and first plate 51 are inconsistent.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 and second plate 52 are inconsistent.In this way, the first torsion spring 61 enable to the first plate 51 to compress the first locating part 53, and it is spacing that the second torsion spring 62 enables to the second plate 52 to compress second 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 is connected 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 It is 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 support 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 preceding 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 of the stretching of anti-tip wheel 94, and chair is folded Afterwards, it 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 several embodiments of the present utility model, and it describes more specific and detailed, But therefore it can not be interpreted as the limitation to utility model patent scope.It should be pointed out that for the common skill of this area For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to Protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.

Claims (10)

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

First supporting rack and the second supporting rack, first supporting rack and second supporting rack are arranged in a crossed manner and rotatably connect Connect；

Sliding part, the sliding part is installed on second supporting rack and can moved 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 and the first support bar are arranged in a crossed manner and are rotatably connected, and the 4th support bar is handed over the second support bar Fork sets 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 be moved 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 and the first support bar, the second support bar, first sliding part and second sliding part are equal 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 being used for accommodating first locating part, and described first steps up block and described first Plate is slidably matched, and first impeller steps up block with described first and is connected, and described first, which steps up block, is used to contradict 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 being used for accommodating second locating part, and described second steps up block and described second Plate is slidably matched, and second impeller steps up block with described second and is connected, and described second, which steps up block, is used to contradict 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 side by side provided with 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 mouthful, the Article 3 shape mouthful are connected with second recess；

Described first, which steps up block, first locating part, to be moved along first strip shape gob, and described second steps up block, institute Stating the second locating part can move along the Article 3 shape mouthful；

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

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

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 Contradicted with first sliding part, the other end of first torsion spring and first plate are inconsistent；Second plate is set There is the second alignment pin, second torsion spring is set on second alignment pin, and one end of second torsion spring and described the Two sliding parts are contradicted, and the other end of second torsion spring and second plate are inconsistent.

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 and first pillar are rotatable 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 after Roller, the chair back is rotatably connected with the seat support；The first supporting rack bottom is connected with the rear roller, described second Supporting rack bottom is connected with the front wheel.