CN214016768U

CN214016768U - Office chair with detachable back cover

Info

Publication number: CN214016768U
Application number: CN202022934995.2U
Authority: CN
Inventors: 章国强; 章莉妍; 徐响; 章妙
Original assignee: Johnson Huizhou Home Development Co ltd
Current assignee: Johnson Huizhou Home Development Co ltd
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2021-08-24
Anticipated expiration: 2030-12-07

Abstract

The utility model belongs to the technical field of the office chair, especially, relate to a detachable office chair of back of body cover, include: the headrest mechanism comprises a body and a connecting assembly, the body is provided with an opening cavity, the connecting assembly is arranged on the body, a crease structure is formed in the middle of the body, the body can be folded to be in a pillow-shaped structure through the crease structure, and the connecting assembly is used for locking two ends of the body to maintain the body in the pillow-shaped structure; the cushion mechanism is used for bearing a user, the body passes through opening die cavity detachably cover is established on the back of the body pad unit of cushion mechanism, adopt the back of the body cover that has the cavity structure, set up locking structure on the back of the body cover, make the back of the body cover realize detachable deformation becomes the headrest structure, convenient to use neither can drop, does not occupy too much space again, improves office chair's practicality.

Description

Office chair with detachable back cover

Technical Field

The utility model belongs to the technical field of the office chair, especially, relate to a detachable office chair of back of body cover.

Background

Office chairs refer to various chairs which are convenient to work in daily work and social activities, office partners divide the office chairs into a narrow meaning and a broad meaning, the narrow office chair refers to a backrest chair on which a person sits when working on a table top in a sitting posture, and the broad office chair refers to all chairs used in offices, including executive chairs, middle class chairs, guest chairs, employee chairs, conference chairs, visitor chairs, training chairs and the like.

The handrail in traditional office chair mostly all adopts fixed knot to construct the setting, can't adjust the crowd different with the adaptation size, the shoulder of the user of different physiques is not of uniform length to the joint position of forearm, whether the high influence user between handrail to the cushion can be taken the forearm comfortably and put on the handrail, because most handrails among the prior art all adopt fixed structure, the crowd of the different physiques of unable adaptation, therefore the practicality is low, more and more can't satisfy consumer's demand, be unfavorable for enterprise development.

Simultaneously, most of the suitability users are convenient, all can select directly to have a rest on office chair to take the headrest so that the head relaxs, but the back that finishes of having a rest, the headrest generally can only be laid in office chair cushion rear side, namely user's waist position, such setting headrest drops easily, makes dirty, and simultaneously, the back receives the headrest influence and reduces user's use and experiences, is unfavorable for enterprise's development.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a detachable office chair of back of body cover aims at solving the office chair's among the prior art headrest and does not have the department and lay, influences the technical problem who uses.

In order to achieve the above object, an embodiment of the present invention provides a detachable office chair with a detachable back cover, including: the headrest mechanism comprises a body and a connecting assembly, the body is provided with an opening cavity, the connecting assembly is arranged on the body, a crease structure is formed in the middle of the body, the body can be folded to be in a pillow-shaped structure through the crease structure, and the connecting assembly is used for locking two ends of the body to maintain the body in the pillow-shaped structure; the cushion mechanism is used for bearing a user, and the body is detachably sleeved on a back cushion unit of the cushion mechanism through the opening cavity.

Optionally, the detachable back cover further comprises a supporting mechanism and an armrest mechanism, the supporting mechanism comprises a lifting mechanism and a moving mechanism, the lifting mechanism is arranged on the moving mechanism, an output end of the lifting mechanism is in driving connection with the bottom of the seat cushion mechanism, the moving mechanism is used for driving the whole detachable back cover office chair to move along the ground, and the armrest mechanism is arranged on the seat cushion mechanism and used for supporting the hand of a user; the cushion mechanism comprises a mounting assembly, a waist supporting pad and a hip supporting pad, the mounting assembly is arranged at the output end of the lifting mechanism, and the waist supporting pad and the hip supporting pad are respectively arranged on the side wall and the bottom surface of the mounting assembly; the installation component comprises an installation seat and an extension support, the installation seat is fixedly arranged at the output end of the lifting mechanism, the extension support is rotatably connected to the installation seat, two ends of the extension support are respectively rotatably connected with two ends of the hip supporting pad, the hip supporting pad is rotatably connected with the waist supporting pad, the waist supporting pad is arranged in a vertical state, the hip supporting pad is arranged in a horizontal state, and the body can pass through the detachable cover of the opening cavity and is arranged above the waist supporting pad.

Optionally, the armrest mechanism comprises a connecting seat, a supporting seat and a deflection piece, one end of the connecting seat is fixedly connected with the edge of the cushion mechanism, a vertically arranged slot is arranged at the upper end of the connecting seat, a plurality of tooth sockets are arranged on the inner wall of the slot in parallel along the length direction of the slot, the supporting seat is provided with an opening cavity for slidably connecting the upper end of the connecting seat and is used for abutting against the forearm part of a user, the middle position of the deflection piece is rotatably connected to the supporting seat and is positioned in the opening cavity, a free end of the deflection piece extends into the slot and is provided with a hook capable of being matched with the tooth socket in a clamping manner, one end of the hook far away from the tooth socket is provided with a spring sheet for driving the hook to move towards the tooth socket, the upper end of the supporting seat is provided with an opening, and the opening is movably connected with a switch, the other free end of the deflection part is fixedly connected with the switch.

Optionally, the connecting seat includes connecting portion and joint portion, connecting portion with cushion mechanism fixed connection, joint portion sets up the upper end of connecting portion, the draw-in groove shaping in the joint portion, joint portion with the hookup location of connecting portion is the bending structure setting.

Optionally, the moving mechanism includes a center seat, connecting support legs and pulleys, the number of the connecting support legs and the number of the pulleys are multiple groups and equal, the multiple groups of the connecting support legs are uniformly connected to the circumferential side wall of the center seat, the pulleys are respectively connected to the end portions, far away from the center seat, of the connecting support legs in a one-to-one correspondence manner, and the lifting mechanism is arranged at the upper end of the center seat.

Optionally, the number of the extension support is two sets of, and is two sets of the extension support rotates respectively to be connected on the mount pad, the extension support includes first link and second link, the one end of first link with mount pad fixed connection, the other end of first link with the buttock supporting pad rotates to be connected, the one end of second link with the mount pad damping rotates to be connected, the other end of second link dorsad first link extends, the second link is kept away from the tip of first link is bent upwards and is formed and be used for the butt of bending of waist supporting pad.

Optionally, the first attachment bracket is in dampened rotational connection with the hip support pad.

Optionally, the trip is close to the tip of inclined to one side goods of furniture for display rather than for use is provided with first slope spigot surface, first slope spigot surface toward the direction of inclined to one side goods of furniture for display rather than for use upwards inclines gradually and sets up, the upper end lateral wall of the open position of tooth's socket is provided with second slope spigot surface, second slope spigot surface toward the direction of inclined to one side goods of furniture for use upwards inclines gradually and sets up, the inclination of first slope spigot surface is less than the inclination of second slope spigot surface.

Optionally, the tooth's socket is kept away from the upper end inner wall of inclined to one side goods of furniture for display rather than for use is provided with first horizontal butt face, the trip is close to the upper end of tooth's socket is provided with and is used for the butt adaptation the second horizontal butt face of first horizontal butt face.

Optionally, coupling assembling is including setting up respectively the lock seat and the spring bolt at the both ends of body, the spring bolt with be connected with the strap between the body.

The embodiment of the utility model provides an above-mentioned one or more technical scheme in the detachable office chair of back of the body cover have one of following technological effect at least: the working principle of the office chair with the detachable back cover is as follows: when the headrest is needed to be used, the body is taken down from the back cushion unit, folded through the crease structure and locked through the connecting assembly to form a headrest-shaped structure; when need not using the headrest, the unblock body is established on back of the body pad unit with its cover again, compares in the office chair among the prior art and lacks the structure of suitable installation headrest, the technical problem that the practicality is low, the embodiment of the utility model provides a detachable office chair of back of the body cover, the headrest of rest usefulness can firmly be installed on the back of the body pad at non-user state, neither can drop, also can not occupy too big space, and the practicality is high, is favorable to the enterprise to develop.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic structural view of the detachable office chair with detachable back cover after the headrest mechanism is detached.

Fig. 2 is an exploded view of the structure of the office chair with the detachable back cover in fig. 1.

Fig. 3 is a schematic structural view of the seat cushion mechanism in fig. 1.

Fig. 4 is an exploded view of the structure of the armrest mechanism of fig. 1.

Fig. 5 is a cut-away view of the armrest mechanism of fig. 1.

Fig. 6 is a schematic structural view of the headrest mechanism of the office chair with a detachable back cover according to the embodiment of the present invention, when the headrest mechanism is installed on the back cushion unit.

Fig. 7 is a bottom view of the headrest mechanism in fig. 6.

Fig. 8 is a schematic view of the folded headrest mechanism of fig. 6.

Wherein, in the figures, the respective reference numerals:

10-cushion mechanism 20-supporting mechanism 30-armrest mechanism

21-lifting mechanism 22-moving mechanism 31-connecting seat

32-support seat 33-deflection swing part 34-tooth groove

35-hook 36-elastic sheet 37-limiting block

38-switch 221-center seat 222-connection support leg

223-pulley 11-mounting assembly 12-lumbar support pad

13-buttocks supporting pad 111-mounting seat 112-extension support

113-first connecting frame 114-second connecting frame 311-connecting part

312-clamping part.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to fig. 1-5 are exemplary and intended to be used to illustrate embodiments of the present invention, and should not be construed as limiting the invention.

In the description of the embodiments of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which is only for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as fixed or detachable connections or as an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In an embodiment of the present invention, as shown in fig. 1 to 8, there is provided an office chair with a detachable back cover, comprising a cushion mechanism 10, a support mechanism 20 and an armrest mechanism 30, wherein the cushion mechanism 10 is used for bearing a user; the supporting mechanism 20 comprises a lifting mechanism 21 and a moving mechanism 22, the lifting mechanism 21 is arranged on the moving mechanism 22, the output end of the lifting mechanism 21 is in driving connection with the bottom of the seat cushion mechanism 10, and the moving mechanism 22 is used for driving the whole office chair with the detachable back cover to move along the ground; the armrest mechanism 30 comprises a connecting seat 31, a supporting seat 32 and a deflection swing part 33, one end of the connecting seat 31 is fixedly connected with the edge of the cushion mechanism 10, a vertically arranged clamping groove is arranged at the upper end of the connecting seat 31, a plurality of tooth grooves 34 are arranged on the inner wall of the clamping groove in parallel along the length direction of the clamping groove in sequence, the supporting seat 32 is provided with an opening cavity for slidably connecting the upper end of the connecting seat 31 and is used for abutting against the forearm part of a user, the middle position of the deflection swing part 33 is rotatably connected on the supporting seat 32 and is positioned in the opening cavity, a free end of the deflection swing part 33 extends into the clamping groove and is provided with a hook 35 capable of being clamped and matched with the tooth grooves 34, one end of the hook 35 far away from the tooth grooves 34 is provided with an elastic sheet 36 for driving the hook 35 to move towards the tooth grooves 34, the upper end of the supporting seat 32 is provided with an opening, the opening is movably connected with a switch 38, and the other free end of the deflection swinging part 33 is fixedly connected with the switch 38.

Specifically, the working principle of the office chair with the detachable back cover is as follows: when the armrest of the office chair needs to be adjusted, the switch 38 is pressed in the direction of the opening, the switch 38 moves towards the inner side of the opening, the switch 38 drives the deflection swing part 33 to rotate, so that the hook 35 is far away from the tooth groove 34, at the moment, the supporting seat 32 and the deflection swing part 33 are movable parts capable of moving up and down in a straight line compared with the connecting seat 31, a user drives the supporting seat 32 to move up to a proper height, then the switch 38 is released, and the elastic sheet 36 drives the hook 35 to be clamped close to the corresponding tooth groove 34, so that the armrest is positioned; compare the fixed setting of office chair handrail among the prior art, can't satisfy all users' practical demand, the low technical problem of practicality, the utility model provides a detachable office chair of back of the body cover realizes handrail quick adjustment through simple structure's trip 35 and tooth's socket 34 structure, the user of the different demands of adaptation, practicality greatly increased is favorable to enterprise development.

As shown in fig. 1 to 8, in another embodiment of the present invention, the connecting seat 31 includes a connecting portion 311 and a clamping portion 312, the connecting portion 311 is fixedly connected to the seat cushion mechanism 10, the clamping portion 312 is disposed at an upper end of the connecting portion 311, the clamping groove is formed on the clamping portion 312, and a connecting position between the clamping portion 312 and the connecting portion 311 is a bent structure; specifically, the connecting seat 31 is arranged in an L-shaped structure, the end of the connecting portion 311 away from the clamping portion 312 and the seat cushion mechanism 10 are both provided with threaded holes, and the connecting portion 311 is connected with the seat cushion mechanism 10 through screws, so that the structure is simple and convenient to manufacture; the connecting portion 311 with the connection position of joint portion 312 is provided with circular arc chamfer structure, is favorable to increasing the structural strength of this connecting seat 31, prolongs the life of this connecting seat 31.

As shown in fig. 1-8, in another embodiment of the utility model, the upper end of draw-in groove is provided with and is used for spacingly the free end of goods of furniture for display rather than for use 33 is in stopper 37 in the draw-in groove prevents effectively goods of furniture for display rather than for use 33 breaks away from the draw-in groove, stopper 37 is close to the edges and corners of goods of furniture for display rather than for use 33 becomes fillet structure and sets up, is favorable to prolonging this goods of furniture for display rather than for use 33 and stopper 37's life.

As shown in fig. 1-8, in another embodiment of the present invention, the switch 38 and the inclined to one side goods of furniture 33 are made of plastic material, the switch 38 and the inclined to one side goods of furniture 33 are injection-molded by an injection molding machine, and the integrally formed structure is adopted to be firm, so that the manufacture is convenient, and the manufacture efficiency of the inclined to one side goods of furniture 33 and switch 38 is improved.

As shown in fig. 1-8, in another embodiment of the present invention, the moving mechanism 22 includes a central seat 221, connecting legs 222 and pulleys 223, the number of the connecting legs 222 and the pulleys 223 is multiple groups and equal, the multiple groups of the connecting legs 222 are uniformly connected to the circumferential side wall of the central seat 221, each of the pulleys 223 is respectively connected to the connecting legs 222 in a one-to-one rotation manner at the end of the central seat 221, the lifting mechanism 21 is disposed at the upper end of the central seat 221, the connecting legs 222 are set in an arc-shaped rod structure, and the connecting legs 222 distributed uniformly in a star-shaped structure are beneficial to improving the stability of the detachable office chair with a back cover, so that the office chair can roll and the potential safety hazard of the user can be eliminated.

As shown in fig. 1 to 8, in another embodiment of the present invention, the seat cushion mechanism 10 includes a mounting assembly 11, a lumbar support pad 12 and a hip support pad 13, the mounting assembly 11 is disposed at an output end of the lifting mechanism 21, and the lumbar support pad 12 and the hip support pad 13 are respectively disposed on a side wall and a bottom surface of the mounting assembly 11; the installation component 11 includes mount pad 111 and extension support 112, the fixed setting of mount pad 111 is in elevating system 21's output, extension support 112 rotates to be connected on the mount pad 111, the both ends of extension support 112 respectively with the both ends of buttock supporting pad 13 rotate to be connected, buttock supporting pad 13 with waist supporting pad 12 rotates to be connected, waist supporting pad 12 is vertical state setting, buttock supporting pad 13 is the horizontality setting, the installation component 11 installation waist supporting pad 12 with buttock supporting pad 13, and waist supporting pad 12 and buttock supporting pad 13 rotate respectively with installation component 11 and are connected, are favorable to the nimble regulation of waist supporting pad 12 and buttock supporting pad 13.

As shown in fig. 1 to 8, in another embodiment of the present invention, the number of the extension brackets 112 is two, two sets of the extension brackets 112 are respectively rotatably connected to the mounting seat 111, the extension bracket 112 includes a first connecting frame 113 and a second connecting frame 114, one end of the first connecting frame 113 is fixedly connected to the mounting seat 111, the other end of the first connecting frame 113 is rotatably connected to the hip support pad 13, one end of the second connecting frame 114 is rotatably connected to the mounting seat 111 in a damping manner, the other end of the second connecting frame 114 extends away from the first connecting frame 113, an end of the second connecting frame 114 away from the first connecting frame 113 is bent upward to form a bending abutting portion for abutting against the lumbar support pad 12, and the two sets of the extension brackets 112 are beneficial to improving the structural stability of the lumbar support pad 12 and the hip support pad 13, prevent that waist supporting pad 12 and buttock supporting pad 13 from dropping, improve this office chair's structural strength, adopt the damping to rotate to be connected with and do benefit to improving the rotatory back location of second link 114.

As shown in FIGS. 1-8, in another embodiment of the present invention, the first connecting frame 113 and the hip support pad 13 are connected by rotation of damping, which is beneficial to positioning after rotation of the hip support pad 13, the hip support pad 13 and the waist support pad 12 are connected by rotation of damping.

As shown in fig. 1-8, in another embodiment of the present invention, the hook 35 is close to the end of the inclined pendulum 33 is provided with a first inclined guiding surface, the first inclined guiding surface is toward the inclined upward setting of the inclined pendulum 33 gradually, the upper end side wall of the opening position of the tooth socket 34 is provided with a second inclined guiding surface, the second inclined guiding surface is toward the inclined upward setting of the inclined pendulum 33 gradually, the inclination angle of the first inclined guiding surface is smaller than the inclination angle of the second inclined guiding surface, the first inclined guiding surface and the second inclined guiding surface are adopted to facilitate the reduction of the moving distance of the switch 38, so that the adjustment operation becomes more convenient, and the use experience of the consumer is improved.

As shown in fig. 1-8, in another embodiment of the present invention, the tooth socket 34 is kept away from the upper end inner wall of the inclined to one side pendulum 33 is provided with a first horizontal abutting surface, the trip 35 is close to the upper end of the tooth socket 34 is provided with a second horizontal abutting surface for abutting against the first horizontal abutting surface, and the first horizontal abutting surface and the second horizontal abutting surface are adopted to facilitate improving the connection stability of the trip 35 and the tooth socket 34, so as to prevent the trip 35 from loosening and affecting the handrail.

As shown in fig. 1-8, in another embodiment of the present invention, the supporting seat 32 is a "T" shaped structure, and the opening is disposed on the bottom wall of the upper transverse portion of the supporting seat 32, so as to effectively prevent the switch 38 from being touched by mistake, and further improve the practicability of the office chair.

As shown in fig. 1-8, in another embodiment of the present invention, the detachable office chair further includes a headrest mechanism, the headrest mechanism 50 includes a body 51 and a connecting assembly 52, the body 51 is provided with an opening cavity, the connecting assembly 52 is disposed on the body 51, a fold line structure is formed at the middle position of the body 51, the body 51 can pass through the fold line structure to be a pillow-shaped structure, the connecting assembly 52 is used for locking the two ends of the body 51 to maintain the body 51 in the pillow-shaped structure, and the body 51 can pass through the opening cavity detachably cover and is disposed above the waist supporting pad 12.

Specifically, the body 51 is taken down from the back cushion unit, folded by a crease structure, and locked by the connecting assembly 52 to be formed into a headrest-like structure; when need not using the headrest, unblock body 51 establishes on back of the body pad unit with it again, compares in the office chair among the prior art and lacks the structure of suitable installation headrest, the low technical problem of practicality, the embodiment of the utility model provides a detachable office chair of back of the body cover, the headrest of rest usefulness can firmly be installed on the back of the body pad at non-user state, neither can drop, also can not occupy too big space, and the practicality is high, is favorable to the enterprise to develop.

As shown in fig. 1-8, in another embodiment of the present invention, the connecting assembly 52 includes a lock seat and a lock tongue respectively disposed at two ends of the body 51, the lock tongue and the body 51 are connected with a cloth belt therebetween, in other embodiments, the connecting assembly 52 can also be a button, etc., and the locking structure such as the button is adopted to facilitate the improvement of the locking ability of the connecting assembly 52, optimize the structure of the locking assembly, and further improve the practicability of the office chair.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A detachable office chair of back cover which characterized in that includes:

the headrest mechanism comprises a body and a connecting assembly, wherein the body is provided with an opening cavity, the connecting assembly is arranged on the body, a crease structure is formed in the middle of the body, the body can be folded to be in a pillow-shaped structure through the crease structure, and the connecting assembly is used for locking two ends of the body so as to maintain the body in the pillow-shaped structure;

the cushion mechanism is used for bearing a user, and the body is detachably sleeved on a back cushion unit of the cushion mechanism through the opening cavity.

2. The back-cover detachable office chair according to claim 1, wherein: the detachable back cover further comprises a supporting mechanism and an armrest mechanism, the supporting mechanism comprises a lifting mechanism and a moving mechanism, the lifting mechanism is arranged on the moving mechanism, the output end of the lifting mechanism is in driving connection with the bottom of the cushion mechanism, the moving mechanism is used for driving the whole detachable back cover office chair to move along the ground, and the armrest mechanism is arranged on the cushion mechanism and used for supporting the hand of a user;

the cushion mechanism comprises a mounting assembly, a waist supporting pad and a hip supporting pad, the mounting assembly is arranged at the output end of the lifting mechanism, and the waist supporting pad and the hip supporting pad are respectively arranged on the side wall and the bottom surface of the mounting assembly; the installation component comprises an installation seat and an extension support, the installation seat is fixedly arranged at the output end of the lifting mechanism, the extension support is rotatably connected to the installation seat, two ends of the extension support are respectively rotatably connected with two ends of the hip supporting pad, the hip supporting pad is rotatably connected with the waist supporting pad, the waist supporting pad is arranged in a vertical state, the hip supporting pad is arranged in a horizontal state, and the body can pass through the detachable cover of the opening cavity and is arranged above the waist supporting pad.

3. The back-cover detachable office chair according to claim 2, wherein: the armrest mechanism comprises a connecting seat, a supporting seat and a deflection piece, one end of the connecting seat is fixedly connected with the edge of the cushion mechanism, the upper end of the connecting seat is provided with a vertically arranged clamping groove, the inner wall of the clamping groove is provided with a plurality of tooth grooves which are arranged in parallel along the length direction of the clamping groove in sequence, the supporting seat is provided with an opening cavity for slidably connecting the upper end of the connecting seat and is used for abutting against the forearm part of a user, the middle position of the deflection piece is rotatably connected on the supporting seat and is positioned in the opening cavity, one free end of the deflection piece extends into the clamping groove and is provided with a clamping hook capable of clamping and adapting to the tooth grooves, one end of the clamping hook, which is far away from the tooth grooves, is provided with a spring sheet for driving the clamping hook to move towards the tooth grooves, the upper end of the supporting seat is provided with an opening, and the opening is movably connected with a switch, the other free end of the deflection part is fixedly connected with the switch.

4. The back-cover detachable office chair according to claim 3, wherein: the connecting seat includes connecting portion and joint portion, connecting portion with cushion mechanism fixed connection, joint portion sets up the upper end of connecting portion, the draw-in groove shaping in the joint portion, joint portion with the hookup location of connecting portion is the bending structure setting.

5. The back-cover detachable office chair according to claim 2, wherein: the moving mechanism comprises a center seat, connecting support legs and pulleys, wherein the number of the connecting support legs and the number of the pulleys are multiple groups and equal, the multiple groups of the connecting support legs are uniformly connected to the circumferential side wall of the center seat, the pulleys are respectively in one-to-one correspondence to be rotatably connected to the end parts, far away from the center seat, of the connecting support legs, and the lifting mechanism is arranged at the upper end of the center seat.

6. The back-cover detachable office chair according to claim 2, wherein: the number of extending the support is two sets of, and is two sets of it rotates respectively to extend the support and connects on the mount pad, it includes first link and second link to extend the support, the one end of first link with mount pad fixed connection, the other end of first link with the buttock supporting pad rotates to be connected, the one end of second link with the mount pad damping rotates to be connected, the other end of second link dorsad first link extends, the second link is kept away from the tip of first link is up bent and is formed and be used for the butt of bending of waist supporting pad.

7. The back-cover-detachable office chair according to claim 6, wherein: the first connecting frame is connected with the hip supporting pad in a damping rotating mode.

8. The back-cover detachable office chair according to claim 3, wherein: the trip is close to the tip of goods of furniture for display rather than for use is provided with first slope spigot surface, first slope spigot surface toward the direction of goods of furniture for display rather than for use up the slope setting gradually, the upper end lateral wall of the open position of tooth's socket is provided with second slope spigot surface, second slope spigot surface toward the direction of goods of furniture for display rather than for use up the slope setting gradually, the inclination of first slope spigot surface is less than the inclination of second slope spigot surface.

9. The back-cover detachable office chair according to claim 3, wherein: the tooth's socket is kept away from the upper end inner wall of inclined to one side goods of furniture for display rather than for use is provided with first horizontal butt face, the trip is close to the upper end of tooth's socket is provided with and is used for the butt adaptation the second horizontal butt face of first horizontal butt face.

10. The back-cover detachable office chair according to claim 1, wherein: coupling assembling is including setting up respectively the lock seat and the spring bolt at the both ends of body, the spring bolt with be connected with the strap between the body.