CN101060799A

CN101060799A - Chair

Info

Publication number: CN101060799A
Application number: CNA2004800444257A
Authority: CN
Inventors: 李秉哲
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-09-22
Filing date: 2004-09-22
Publication date: 2007-10-24
Also published as: WO2006033490A1

Abstract

A miniature magnetic field sensor including a magnetic core which co-operates with at least one excitation coil and a detection coil. In the magnetic field sensor, the core is open and includes at least one bar having tapered ends. A method of fabricating the sensor is provided using microtechnology techniques.

Description

Chair

Technical field

The present invention relates generally to a kind of chair, and more particularly, relate to the chair that the height of a kind of wherein seat and backrest can be regulated separately.

Background technology

Just as is generally known, according to the expectation target of chair, used polytype chair.Chair typically is divided into bench (coach) and individual chair.Bench allows above several people are sitting in together.Individual chair is designed to allow sit a people in the above.Especially, under the situation of individual chair,, multiple function make the user feel more comfortable thereby being provided for chair.

Usually, traditional individual chair comprises the seat of the buttocks that supports the user and the backrest of the back that supports the user.Further, this chair can have the head rest of the head that supports the user or user's arm rests top handrail.

Simultaneously, use chair everyone have different builds.Therefore, for the shape that changes chair adapting to the build that is sitting in the people on the chair, be installed on the chair such as the multiple adjusting device of seat height adjustment device and backrest height adjusting device.

Further, a kind of device of regulating the angle of inclination of backrest can be set on chair, thereby allow the user to rectify comfily to be seated or recumbency.

In traditional chair, the seat is installed to and is placed on ground support frame, so that regulate the height at seat in vertical direction, and backrest is coupled to the seat, so that its height can be along with respect to adjusted on the vertical direction at seat or the incline direction.When user's back rested on the chair, the external force that is applied to backrest was sent to support frame indirectly through the seat.Thereby user's weight does not support with being stabilized, and therefore moment loading causes the damage to parts on corresponding joint.

Further, the problem of conventional chair is: the draw bail of parts is quite loaded down with trivial details and complicated, thereby causes the high product cost.

Summary of the invention

Therefore, the present invention has considered the problems referred to above that occur in the prior art, and the purpose of this invention is to provide a kind of chair with simple structure, the seat of described chair and the height of backrest can be easily adjusted, with suitable user's build, thereby support user's weight safely.

In order to realize this purpose, the invention provides a kind of chair, described chair comprises: a pair of " ∠ " type support frame, each support frame all has bar-shaped support, and described bar-shaped support is flatly arranged and is placed on the ground; Guide member, described guide member are arranged becoming predetermined angular with support component, and a plurality of lock hole is formed in the guide member along the length direction of guide member; And coupling components, described coupling components connects support frame in parallel with each other; The seat uses the seat height adjustment device, and this seat is installed on the support component of each support frame, so that the adjustable height at seat; Backrest uses the backrest height adjusting device, and this backrest is installed on the support component of each support frame, so that the adjustable height of backrest.

According to the present invention, seat height adjustment device and/or backrest height adjusting device comprise: movable block, this movable block be around the support component of each support frame, and movable block is secured to support component with can be along its length direction activity; Stop pin, this stop pin is installed on the movable block versatilely, and inserts separatably in the lock hole of support component; Spring, this spring is along a flexibly biases lock rationed marketing of direction; And bar, this bar rotatably is installed to movable block, and will be shifted onto in the lock hole along the stop pin of a direction biasing by spring.

This seat height adjustment device and/or backrest height adjusting device comprise: shell, this shell be around the support component of each support frame, and be secured to support component with can be along its length direction activity; Stop pin, this stop pin is installed on the shell versatilely, and inserts separatably in the related lock hole of support component; Spring, this spring is along the rationed marketing of a direction biases lock; And button, this button is installed to shell in reciprocating mode, and will be shifted onto in the lock hole along the stop pin of a direction elastic biasing by spring.

Use backrest anglec of rotation adjusting device, this backrest is rotatably installed on the backrest height adjusting device.

This backrest anglec of rotation adjusting device comprises:

The rotation back shaft, first end of described rotation back shaft has geared parts and is secured to backrest; And second end of described rotation back shaft rotatably is installed to the shell of backrest height adjusting device; Button, this button is installed on the shell of backrest height adjusting device in reciprocating mode, and optionally engages with geared parts; And spring, this spring is along the direction button of flexibly setovering.

Head rest is installed on the top of backrest with forward and rotation backward.

Shoulder spare is set on the head rest; The neck seat is formed between the shoulder spare and is placed in the neck seat with the neck that allows the user; And shoulder seat is set at the front of backrest, so that when relying on front curve right overhead, the shoulder spare of this head rest is in place on the shoulder seat of backrest.

Locking projection is set on each shoulder spare, and the locking step is set on each shoulder seat, so that the locking projection of shoulder spare engages with the locking step of shoulder seat separatably.

The head rest attachment pegs projects upwards from backrest, and the pin insertion groove is formed on the head rest, and when keeping the head rest attachment pegs to insert in the pin insertion groove with box lunch, head rest can be before axial rotary and rotation backward.

The support component of each support frame all is provided with preceding and trailing wheel.

This chair further comprises brake unit, and described brake unit is in order to optionally to brake the trailing wheel on the support component that is arranged on each support frame.

This brake unit comprises: be arranged on the serrated part on the trailing wheel; And handle, this handle is rotatably installed on the wheel coupling components of support component, and optionally engages with serrated part.

Handle is set on the guide member of each support frame.

Use the handle rotating control assembly, this handle is rotatably installed on the support frame.

This handle rotating control assembly comprises: first parts, and these first parts have rotating shaft and uneven part, and are secured to the upper end of the guide member of each support frame; With second parts, these second parts have an insertion portion and uneven part, and are secured to each end of " U " type handle.

Description of drawings

Fig. 1 is the perspective view that shows according to chair of the present invention;

Fig. 2 is the perspective view that shows according to the seat height adjustment device of chair of the present invention;

Fig. 3 is the enlarged left view of the vitals of Fig. 2;

Fig. 4 is the vertical view of Fig. 3;

Fig. 5 is the amplification front figure that shows the vitals of Fig. 2;

Fig. 6 is the decomposition diagram that shows backrest and head rest;

Fig. 7 is the sectional view along the line A-A intercepting of Fig. 6;

Fig. 8 is the sectional view along the line B-B intercepting of Fig. 7;

Fig. 9 is the view that illustrates backrest anglec of rotation adjusting device, wherein breaks the housing parts of backrest height adjusting device, and observes from the vertical direction of the guide member of support frame;

Figure 10 is the right side view that shows according to the vitals of chair of the present invention;

Figure 11 is the zoomed-in view of the vitals of Figure 10;

Figure 12 is the vertical view that shows the trailing wheel that braking (brake) unit is housed;

Figure 13 is the sectional view along the line C-C intercepting of Figure 12;

Figure 14 is the view corresponding to Figure 13, illustrates the operation of brake unit; With

Figure 15 is the perspective view that the part of demonstration handle rotating control assembly breaks.

The specific embodiment

Hereinafter, describe the present invention with reference to the accompanying drawings in detail.

With reference to Fig. 1, chair according to the present invention comprises: a pair of " ∠ " type support frame 10; Seat 20; With backrest 30.Each support frame 10 all comprises bar-shaped support 11 and guide member 12.This support component 11 is horizontally disposed and be placed on the ground.This guide member 12 arranges obliquely, and forming predetermined angulars with support component 11, and a plurality of lock hole 12a forms along the length direction of guide member 12.This support frame 10 connects by connector 13 in mode parallel to each other.Use seat height adjustment device 100 that seat 20 is installed to the support component 11 of support frame 10, so that the height of seat 20 is adjustable.Use backrest height adjusting device 200 that backrest 30 is installed to the support component 11 of support frame 10, so that the height of backrest 30 is adjustable.

According to the present invention, seat 20 and backrest 30 are installed to each support frame 10 that all has " ∠ " shape, so that realize the direct adjusting of the height of seat and backrest.Therefore, the structure of this chair is very simple.Further, the load that is applied to seat 20 and backrest 30 directly is sent to the support component 11 of support frame 10 by the guide member 12 of support frame 10, so user's weight is more stably supported.

In addition, because seat 20 and backrest 30 are installed on the support frame 10 independently, the height of seat 20 and backrest 30 can differently be regulated, and can not cause the interference of seat 20 and backrest 30.

Shown in Fig. 2 to 5, each seat height adjustment device 100 all comprises: movable block 110; Stop pin 120; Spring 130; With bar 140.This movable block 110 is around the support component 11 of each support frame 10, so that can be along its length direction activity.This stop pin 120 is installed to movable block 110 movably, and inserts separatably among the lock hole 12a of each support component 11.This spring 130 is along direction biases lock rationed marketing 120.This bar 140 is rotatably installed on the movable block 110, and will be shifted onto lock hole 12a along the stop pin 120 of a direction biasing by spring 130.This bar 140 comprises push mechanism 141 and grip member (grip part) 142.This push mechanism 141 will be shifted lock hole 12a onto along the stop pin 120 of an aspect biasing by spring 130.This grip member 142 allows user's grasping seat height adjustment easily device.The outer circumferential surface of this push mechanism 141 is formed so that push mechanism 141 is moved gradually along the direction of rotating shaft H1.Simultaneously, the two ends at seat 20 firmly are fastened to the seat height adjustment device 100 that is provided with relative to one another.Herein, the secure component of Reference numeral " B1 " representative such as bolt (bolt), described secure component prevent that handle 140 breaks away from rotating shaft H1.

The operation of each seat height adjustment device below will be described.In the state shown in Fig. 2 to 5, the user catches grip member 142, and is bent upwards the seat height adjustment device.At this moment, this bar 140 rotates forward around rotating shaft H1, so that utilize the restoring force of spring, stop pin 120 withdraws from smoothly from the lock hole 12a of guide member 12.Under this state, the height at seat 20 is conditioned, and is bent downwardly grip member 142 then.At this moment, this bar 140 rotates backward around rotating shaft H1, thereby presses pressing spring 130.Thus, stop pin 120 is forcibly fitted among the related lock hole 12a of guide member 12.

As shown in FIGS. 6 to 8, each backrest height adjusting device 200 all comprises shell 210, stop pin 220, spring 230 and button 240.This shell 210 is secured to the support component 11 of each support frame 10, so that can move along its length direction, and shell 210 is around support component 11.This stop pin 220 is installed on the shell 210 movably, and inserts separatably among the lock hole 12a of support component 11.The biases lock rationed marketing 220 in one direction of this spring 230.This button 240 adopts reciprocating mode to be installed on the shell 210, and button 240 will be shifted lock hole 12a onto along the stop pin 220 of a direction biasing by spring 230.This button 240 comprises push mechanism 241 and pressing component 142.This push mechanism 241 will be shifted lock hole 12a onto along the stop pin 220 of a direction elastic biasing by spring 230.This pressing component 142 allows the user easily to handle the backrest height adjusting device.This push mechanism 241 has fork shape, and the surface of push mechanism 241 of contact stop pin 120 forms inclination.

The operation of each backrest height adjusting device below will be described.In the state shown in Fig. 6 to 8, when the user caught shell 210 and pushes pressing component 242 with his or her hand, this button 240 was pushed in the shell 210, thereby promoted stop pin 220 along a direction.Thereby spring 230 is compressed, and this stop pin 220 is forced to withdraw from the lock hole 12a of guide member 12.In this state, when the height of backrest 30 is conditioned and pressing component 242 is released thereafter, utilize the restoring force of spring 230, this stop pin 220 fits among the lock hole 12a of association of guide member 12 naturally.Thus, this bar 140 returns its initial position.

Can carry out multiple modification to seat height adjustment device 100 and backrest height adjusting device 200, and be not limited to the preferred embodiments of the present invention.For example, the arrangement for adjusting height shown in Fig. 2 to 5 can be used as backrest height adjusting device 200.Further, the arrangement for adjusting height shown in Fig. 6 to 8 can be used as seat height adjustment device 100.As long as can regulate the height of seat 20 or backrest 30 along the guide member 12 of each support frame 10, any one all can be used as seat height adjustment device 100 or backrest height adjusting device 200.

Simultaneously, this backrest 30 can be securely fastened to backrest height adjusting device 200.Yet as in this embodiment, preferably, by backrest anglec of rotation adjusting device 300, backrest 30 rotatably is installed to backrest height adjusting device 200.

As shown in FIGS. 9 to 11, each backrest anglec of rotation adjusting device 300 all comprises rotation back shaft 310, button 330 and spring 320.End with rotation back shaft 310 of geared parts 311 is secured to backrest 30, and the other end of rotation back shaft 310 rotatably is fastened to the shell 210 of each backrest height adjusting device 200.Button 330 is installed on the shell 210 of backrest height adjusting device 200 in reciprocating mode, and button 330 optionally engages with geared parts 311.This spring 320 is along the direction button 330 of flexibly setovering.Button 330 comprises Lock Part 331 and pressing component 142.This Lock Part 331 comprises: guiding groove 331a, and rotation back shaft 310 inserts among the described guiding groove 331a; Geared parts 331b, described geared parts 331b optionally engage with the geared parts 311 of rotation back shaft 310; Locking projection 331c with the two ends of support spring 320.This pressing component 142 allows user's control button easily, and is secured to the shell 210 of each backrest height adjusting device 200 in reciprocating mode.In this case, Reference numeral " 211 " is represented axle bed, and described axle bed is arranged on the shell 210 so that rotation back shaft 310 is rotatably installed in the axle bed.

The operation of backrest anglec of rotation adjusting device below will be described.In the state shown in Fig. 9 to 11, the user pushes from the outstanding pressing component 332 of shell 210.At this moment, this button 330 is pushed in the shell 210, so that spring 320 is compressed, and the geared parts 331b of button latch limiting-members 331 is from geared parts 311 separation of rotation back shaft 310.Thus, the joint of this geared parts is released.In this state, when the angle of inclination of backrest 30 is conditioned and pressing component 332 when being released, utilize the restoring force of spring 320, button 330 outwards moves from shell 210.Thus, the geared parts 331b of this button latch limiting-members 331 engages with the geared parts 311 of rotation back shaft 310.

Further, according to this embodiment, as Fig. 1, shown in 6 and 10, thereby head rest 40 is installed in rotation forward or backward on the top of backrest 30.Yet head rest can diversely be installed and is not limited to this embodiment.For example, head rest can integrally be arranged on the top of backrest 30.After head rest was made individually, head rest can be fastened firmly to the top of backrest 30 by the secure component such as bolt or screw.Further, can to adopt it highly be that adjustable mode is arranged on the top of backrest 30 to the head rest of making separately.Certainly, all traditional head rests all can be used for the present invention.

With reference to Fig. 1,6 and 10, shoulder spare 41 is set on the head rest 40, and neck seat 42 is formed between the shoulder spare 41, so that user's neck is placed in the neck seat 42.Shoulder seat 31 is set at the front of backrest 30.Thus, when head rest 40 rotated forward, the shoulder spare 41 of head rest 40 was installed on the shoulder seat 31 of backrest 30, leaned on 40 the back side with supporting member.According to this embodiment, head rest attachment pegs 32 projects upwards from backrest 30, and pin insertion groove 43 is formed on the head rest 40.Thus, when attachment pegs 32 was inserted in the cotter way 43, head rest 40 can rotate forward or backward around rotating shaft H.In this case, backrest 30 and head rest 40 joining parts are embedded in the head rest 40, thereby the rotatory power that prevents head rest 40 is owing to the entering of foreign matter such as dust descends, and good appearance is provided.Further, locking projection 41a is set on the shoulder spare 41, and locking step 31a is set on the shoulder seat 31, so that the locking projection 41a of shoulder spare 41 engages with the corresponding locking step 31a of shoulder seat 31 separatably.In this case, the shoulder spare 41 of head rest 40 stably is installed on the shoulder seat 31 of backrest 30, thereby prevents that head rest 40 is crooked backward undesirably.

Below, with reference to Fig. 1,6 and 10, the interaction of backrest 30 and head rest 40 is described.

In the state of Fig. 1, when external force acts on the upper end of head rest 40 so that head rest 40 is when crooked backward, the engaging of locking step 31 of the locking projection 41a of shoulder spare and shoulder discharged forcibly.Thus, shown in Fig. 6 and 10, head rest 40 is around rotating shaft H2 rotation, so that it is crooked backward.In this state, the user is placed on his or her neck in the neck seat 42 that is arranged between the shoulder spare 41.Subsequently, when his or her head was placed on the head rest 40, shoulder spare 41 covered user's shoulder naturally.In this state, when a personal expectation uses according to chair of the present invention for general purposes, coupling head by 40 and the rotary part of backrest 30 between frictional force be set to high so that the rotation of head rest 40 is hindered slightly.This supports user's head fully, and keeps head rest 40 rotatable simultaneously.Simultaneously, when a personal expectation uses chair according to the present invention as chair for hair wass, coupling head by 40 with the friction of the rotary part of backrest 30 be set to low, to guarantee the level and smooth rotation of head rest 40.Thus, the upper end of head rest 40 can be placed on (not shown) on the lavatory basin.This supports user's head fully, and simultaneously head rest 40 is remained on the lavatory basin.

In this state, the user raises his or her head, and to the his or her health of front curve, so that his or her neck is moved away from the neck seat 42 of head rest 40.After this, head rest 40 is to front curve.At this moment, as shown in Figure 4, head rest 40 rotates forward around rotating shaft H, so that the shoulder spare of head rest 41 is in place on the shoulder seat 31 of backrest.Thus, when the rear portion of each shoulder spare 41 was supported, the locking projection 41a of shoulder spare engaged with the locking step 31a of shoulder seat, thereby kept the state of Fig. 1.Under this state, backrest 30 supports the lower area at user back, and head rest 40 supports the upper area at his or she back.That is, head rest 40 is used as auxiliary backrest.

According to this embodiment, when backrest 30 was left in head rest 40 rotations, head rest 40 was used to support user's head.Simultaneously, when head rest 40 was rotated on the backrest 30, head rest 40 was as auxiliary backrest.Therefore, this structure has improved the validity and the convenience of chair considerably.Further, the shoulder spare 41 of head rest 40 is in place on the shoulder seat 31 of backrest 30, to support the rear portion of each shoulder spare.Therefore, when the height of head rest 40 was kept suitably, each shoulder spare 41 can be exaggerated to cover user's shoulder fully.Therefore, as under the situation of chair for hair wass, prevent that the user from being spattered with water in the present invention.

For the motion easily of chair is provided, as shown in Figure 1, preferably, front-wheel 14 and trailing wheel 15 are installed on the support component 11 of each support frame 10.More preferably, thus front-wheel 14 is installed on the corresponding support component 11 around the coupling spindle rotation.Therefore, can handle chair easily so that chair is moved to the another location.

This can hinder chair to be held in a predetermined position the place.Yet as Fig. 1, shown in 12 and 13, if brake unit (brake unit) 400 is installed on the support component 11 of each support frame 10, to each trailing wheel 15 braking, the problems referred to above are easily solved with optionally.Any traditional brake unit can be applicable to the present invention.Yet according to this embodiment, this brake unit comprises: be arranged on the serrated part 410 on the trailing wheel 15; And handle (lever) 420, this handle 420 is rotatably installed on the wheel coupling components 11a of support component 11, and optionally engages with serrated part 410.This handle 420 comprises: allow user's control member 421 of brake activation unit easily; With Lock Part 422 with the locking projection 422a that engages with serrated part 410.In the case, this serrated part 410 can be made independently, and is installed on the corresponding trailing wheel 15 by the secure component such as bolt or screw.Alternatively, serrated part 410 can constitute whole with trailing wheel 15.Simultaneously, Reference numeral " 11a " expression is fastened to the wheel coupling components of the end of each support component 11 by holding pin 11b.Reference numeral " H3 " expression rotatably is connected to each trailing wheel 15 rotating shaft of corresponding wheel coupling components 11a; And Reference numeral " H4 " expression rotatably is connected to each handle 420 rotating shaft of wheel coupling components 11a.This rotating shaft H4 and the spaced apart preset distance of rotating shaft H3.

The operation of each brake unit 400 is described hereinafter with reference to Figure 13 and 14.

In the state shown in Figure 13, when the user raise each control member 421 with his or her pin or hand, this handle 420 was around rotating shaft H4 rotation.Thus, the locking projection 422a of Lock Part 422 breaks away from serrated part 410, so that discharge the lock-out state of each trailing wheel 15, as shown in figure 14.In this state, this chair is moved to the position of expectation, and each control member 421 is pushed downwards then.At this moment, this handle 420 rotates backward around rotating shaft H4, so that the locking projection 422a of Lock Part 422 engages with serrated part 410.Therefore, as shown in figure 13, each trailing wheel 15 is locked, so trailing wheel 15 can not rotate.In this case, the friction of handle 420 with the joining rotary part of wheel coupling components 11a increased, so the rotation of handle 420 is limited.Thus, only otherwise handle is applied external force, this handle 420 is fastened to the precalculated position fully.

In order to allow chair easily to be moved to other place, shown in Fig. 1 and 15, preferably, handle 60 is installed on the guide member 12 of support frame 10.According to this embodiment, by handle rotating control assembly 500, this handle 60 is rotatably installed on each support frame 10.Yet the installation of this handle can be carried out multiple change and be not limited to the foregoing description.For example, the independent handle of making 60 can be fixedly mounted on the support frame 10.The shape of this handle 60 can be carried out multiple change.

With reference to Figure 15, this handle rotating control assembly 500 comprises first parts 510 and second parts 520.These first parts 510 have rotating shaft 511 and uneven part (unevenpart) 512, and first parts 510 are secured to the upper end of the guide member 12 of each support frame.Second parts 520 have an insertion portion 521 and uneven part 522.Second parts 520 are secured to every end of " U " type handle 60.In this case, Reference numeral " B2 " expression is inserted in the insertion portion 521 and is secured to the bolt of rotating shaft 511.This bolt is used to prevent that second parts 510 from separating.As long as the anglec of rotation that can joystick 60, all traditional devices can be used as handle rotating control assembly 500 and be not limited to present embodiment.

The operation of each handle rotating control assembly 500 is schematically described hereinafter with reference to Figure 15.

When the user promoted " U " type handle 60 forward or pulls back it, it was supported by the uneven part 512 of the combination of first and

second parts

510 and 520 and 522.Therefore, this chair can be pushed forward or pull back.

On the contrary, when handle 60 was crooked up or down, the uneven part 522 of second parts 520 broke away from the uneven part 512 of first parts 510, and second parts 520 that are arranged on the both sides utilize the elasticity of handle 60 closer to each other.Therefore, this handle 60 produces " card clatter " sound simultaneously around rotating shaft 511 rotations of first parts 510.When this handle 60 rotation predetermined angulars, and the external force that not have then to add utilizes the restoring force of handle 60 when being applied to handle 60, and second parts 520 away from each other.The uneven part 522 of each second parts is held with the joint of the uneven part 512 of the first related parts.

Industrial usability

As mentioned above, the invention provides a kind of chair, wherein seat and backrest are installed in a pair of On " ∠ "-type support frame, in order to can directly regulate the height of seat and backrest, thereby have Very simple structure, and the load that is applied to seat and backrest directly is sent to carriage Frame, thereby the weight of more stably bearing the user.

Further, seat and backrest are installed on the support frame individually, thereby make the seat and lean on The height of the back of the body can be regulated in more kinds of modes, avoids simultaneously the interference of seat and backrest.

Claims

1. chair comprises:

A pair of " ∠ " type support frame, each described support frame all has:

Bar-shaped support, described bar-shaped support is flatly arranged and is placed on the ground;

Guide member, described guide member are arranged becoming predetermined angular with support component, and a plurality of lock hole is formed in the guide member along the length direction of guide member; With

Coupling components, described coupling components connects support frame in parallel with each other;

Seat, described seat use the seat height adjustment device to be installed on the support component of each support frame, so that the adjustable height of seat; With

Backrest, described backrest uses the backrest height adjusting device, is installed on the support component of each support frame, so that the height of backrest is adjustable.

2. chair according to claim 1, wherein said seat height adjustment device and/or backrest height adjusting device comprise:

Movable block, described movable block be around the support component of each support frame, thereby and described movable block be fastened to support component can be movable on its length direction;

Stop pin, described stop pin is installed on the movable block versatilely, and inserts separatably in the lock hole of support component;

Spring, described spring is along a flexibly biases lock rationed marketing of direction; With

Bar, described bar rotatably is installed to movable block, and will be shifted onto in the lock hole along the stop pin of a direction biasing by spring.

3. chair according to claim 1, wherein said seat height adjustment device and/or backrest height adjusting device comprise:

Shell, described shell be around the support component of each support frame, and described shell is secured to support component with can be along its length direction activity;

Stop pin, described stop pin is installed on the shell versatilely, and inserts separatably in the related lock hole of support component;

Spring, described spring is along the rationed marketing of a direction biases lock; With

Button, described button is installed to shell in reciprocating mode, and described button will be shifted onto in the lock hole along the stop pin of a direction elastic biasing by spring.

4. chair according to claim 1, wherein:

Use backrest anglec of rotation adjusting device, described backrest is rotatably installed on the backrest height adjusting device.

5. chair according to claim 4, wherein said backrest anglec of rotation adjusting device comprises:

The rotation back shaft, first end of described rotation back shaft has geared parts and is secured to backrest; And second end of described rotation back shaft rotatably is installed to the shell of backrest height adjusting device;

Button, described button is installed on the shell of backrest height adjusting device in reciprocating mode, and optionally engages with geared parts; With

Spring, described spring is along the direction button of flexibly setovering.

6. chair according to claim 4, wherein:

7. chair according to claim 6, wherein:

8. chair according to claim 7, wherein:

9. chair according to claim 7, wherein:

10. according to any described chair of claim 1 to 9, wherein:

The support component of each support frame is provided with preceding and trailing wheel.

11. chair according to claim 10 further comprises:

Brake unit, described brake unit is in order to optionally to brake the trailing wheel on the support component that is arranged on each support frame.

12. chair according to claim 11, wherein said brake unit comprises:

Serrated part, described serrated part is arranged on the trailing wheel; With

Handle, described handle are rotatably installed on the wheel coupling components of support component, and described handle optionally engages with serrated part.

13. according to any described chair of claim 1 to 9, wherein:

Handle is set on the guide member of each support frame.

14. chair according to claim 13, wherein:

Use the handle rotating control assembly, described handle is rotatably installed on the support frame.

15. chair according to claim 14, wherein said handle rotating control assembly comprises:

First parts, described first parts have rotating shaft and uneven part, and described first parts are secured to the upper end of the guide member of each support frame; With

Second parts, described second parts have an insertion portion and uneven part, and described second parts are secured to each end of " U " type handle.