CN219845743U

CN219845743U - Office chair with adjustable seat board and backrest

Info

Publication number: CN219845743U
Application number: CN202320965931.XU
Authority: CN
Inventors: 王庆友
Original assignee: Guangdong Youlianda Smart Home Technology Co ltd
Current assignee: Guangdong Youlianda Smart Home Technology Co ltd
Priority date: 2023-04-26
Filing date: 2023-04-26
Publication date: 2023-10-20
Anticipated expiration: 2033-04-26

Abstract

The utility model relates to the technical field of office chairs, in particular to an office chair with an adjustable seat board and a backrest, which comprises a seat board body, wherein a relaxing and comfort mechanism is arranged on the surface of the seat board body, a height adjusting mechanism is arranged inside the seat board body and on the surface of a backrest board, and an extension accommodating mechanism is arranged inside the seat board body and on the surface of an auxiliary supporting board. The utility model not only ensures that the comfort level of the office chair is higher when in use, but also can effectively relax the buttocks and the waist of the user, so that the legs of the user can be supported when in use, and the legs of the user can be relaxed, and the office chair can better help the user to rest when the user is at noon break, and can adjust the height of the backrest plate according to the use requirement of the user when in use, so that the office chair is more practical.

Description

Office chair with adjustable seat board and backrest

Technical Field

The utility model relates to the technical field of office chairs, in particular to an office chair with an adjustable seat plate and an adjustable backrest.

Background

Office chairs refer to various chairs equipped for convenience in daily work and social activities, and are used for meeting the use requirements of users because people sit on the office chairs for a long time and work, especially when the work is put into the office chairs, the people forget to stand up to exercise the body easily.

The office chairs are required to have a relaxing function on the buttocks and the waist of a user when in use, and some office chairs cannot have the relaxing function when in use, so that the comfort degree of the office chairs is not higher when in use, and meanwhile, the buttocks and the waist of the user cannot be effectively relaxed; the office chairs have the function of extending out of the auxiliary supporting plate when in use, however, some office chairs do not have the function when in use, so that the office chairs can not support the legs of a user when in use, the legs of the user can not be relaxed, and the office chairs can not better help the user to rest when the user is at noon break; the office chair needs the function of adjusting the height setting of back board when using, however some office chairs are inconvenient to set up this function to office chair when using to can not guarantee that office chair can adjust the height of back board according to user's user demand when using, can not make office chair more practical.

Disclosure of Invention

The utility model aims to provide an office chair with an adjustable seat board and a backrest, which solves the problems that the office chair in the prior art cannot be used for setting and loosening the buttocks and the waist of a user, cannot be used for setting and extending an auxiliary supporting board and cannot be used for setting and adjusting the height of the backrest board.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides an adjustable office chair of bedplate and back, includes the bedplate body, the surface mounting of bedplate body bottom position department has fixed baseplate, the surface mounting of fixed baseplate bottom position department has the supporting wheel frame, the handrail that is used for carrying out the support to the arm position of user is all installed on the surface of fixed baseplate both sides, the inside of bedplate body is provided with auxiliary support board, the surface of bedplate body is provided with the back board, ventilation otter board has been seted up to the surface of back board, the surface mounting of bedplate body has control button, the surface of bedplate body is provided with and relaxs comfort mechanism, the inside of relaxing comfort mechanism includes foam-rubber cushion, rubber slab and loosens comfort portion, the inside of bedplate body and the surface of back board are provided with height-adjusting mechanism, height-adjusting mechanism comprises fastening stud, pull ring and height-adjusting portion, the inside of bedplate body and auxiliary support board's surface are provided with and stretch out accommodating mechanism, stretch out accommodating mechanism's inside contains electric putter, accommodating groove and stretching out portion.

Preferably, the comfortable portion of relaxing sets up the surface at the bedplate body, the surface of bedplate body is relaxed the waist of user through comfortable portion of relaxing, comfortable portion of relaxing comprises gluey board, cushion and plate body, the surface mounting of bedplate body top position has the plate body, the surface of plate body is provided with the cushion, the cushion is fixed mutually with the surface of the plate body that keeps away from bedplate body one side.

Preferably, the top of plate body is provided with the rubber slab, the surface of rubber slab bottom position department glues gluey board, glue gluey board's surface and the surface of cushion laminating mutually, the surface of rubber slab top position department is provided with and is used for the foam-rubber cushion, the foam-rubber cushion is fixed mutually with the surface of the rubber slab of keeping away from gluey board one side, the material of foam-rubber cushion is the sponge material.

Preferably, the height-adjusting part is arranged on the surface of the seat board body and the back board, the height of the back board is adjusted through the height-adjusting part, the height-adjusting part is composed of a connecting plate and a telescopic spring, a connecting plate is arranged on the surface of the bottom position of the back board, one end of the connecting plate extends to the inside of the seat board body, the telescopic spring is arranged in the inside of the seat board body, the surface of the top position of the telescopic spring is fixed with the surface of the bottom position of the connecting plate, and a pull ring is arranged on the surface of the connecting plate.

Preferably, one end of the pull ring extends to the outer side of the seat plate body, a groove body is formed in the surface of the seat plate body, the pull ring is in sliding fit with the surface of the groove body, a mounting block is mounted on the surface of the bottom of the pull ring, the surface of the mounting block is in contact with the surface of the seat plate body, a fastening stud used for fixing the pull ring to the surface of the seat plate body is connected with the surface of the mounting block in a threaded manner, and one end of the fastening stud penetrates through the mounting block and is fastened with the surface of the seat plate body in a threaded manner.

Preferably, the extension accommodating part is arranged in the seat plate body and on the surface of the auxiliary supporting plate, the auxiliary supporting plate is folded and unfolded in the seat plate body through the extension accommodating part, the extension accommodating part is composed of a bearing plate, a movable sliding block and balls, an accommodating groove is formed in the seat plate body, the accommodating groove is in sliding fit with the surface of the auxiliary supporting plate, and the bearing plate is arranged on the surface of the bottom of the auxiliary supporting plate.

Preferably, the surface mounting of bearing plate bottom position department has the removal slider, the inside of removal slider and accepting groove is mutually sliding fit, the internally mounted of accepting groove has electric putter, electric putter's input and control button's output electric connection, electric putter's output is fixed with the surface of removing the slider mutually, the reinforcing plate is all installed to the surface of removing the slider, and the surface of reinforcing plate is fixed with the surface of bearing plate bottom position department mutually.

Preferably, equidistant rolling grooves are formed in the surfaces of the bottom positions of the movable sliding blocks, equidistant balls are arranged on the surfaces of the movable sliding blocks, the balls are in mutual rotation fit with the surfaces of the rolling grooves, and the surfaces of the balls are in contact with the inner walls of the accommodating grooves.

Compared with the prior art, the utility model has the beneficial effects that: the office chair with the adjustable seat board and the backrest not only ensures that the comfort degree is higher when the office chair is used, but also can effectively relax the buttocks and the waist of a user, so that the legs of the user can be supported when the office chair is used, the legs of the user can be relaxed, the user can be better helped to rest when the user is at noon break, and the height of the backrest board can be adjusted according to the use requirement of the user when the office chair is used, so that the office chair is more practical;

1. the seat plate has the advantages that the surface of the seat plate body is more elastic and more comfortable under the action of the plate body and the cushion, the adhesion between the rubber plate and the cushion is firmer under the action of the adhesion plate, the seat plate has a waterproof effect, the rubber plate and the cushion are not easy to crack when the seat plate is used for a long time, and the surface of the seat plate body is prevented from cracking under the combined action of the rubber plate and the sponge cushion, so that a user can relax the buttocks and the waist of the user when sitting on the surface of the sponge cushion, and the user is not easy to feel tired when sitting for a long time, so that the function of relaxing the buttocks and the waist of the user by the office chair is realized, the comfort degree of the office chair is higher when the office chair is used, and meanwhile, the buttocks and the waist of the user can be effectively relaxed;

2. the electric push rod extending out of the accommodating mechanism is arranged to control the electric push rod in the accommodating groove to work, the movable slide block is driven to slide left and right in the accommodating groove under the action of the electric push rod, the auxiliary support plate is driven to move left and right in the accommodating part under the action of the movable slide block, the integral strength of the auxiliary support plate is enhanced under the combined action of the bearing plate and the reinforcing plate, so that the bearing strength of the auxiliary support plate is greatly improved, when the movable slide block moves, the ball rotates on the surface of the rolling groove, the friction force generated when the movable slide block moves in the accommodating groove under the combined action of the rolling groove and the ball is reduced, the movable slide block moves in the accommodating groove more smoothly, so that the auxiliary support plate extends out of the accommodating groove, the leg of a user is supported under the action of the auxiliary support plate, the sleeping quality of the user is greatly improved when the auxiliary support plate is used, the control button is operated, the electric push rod is controlled to work, the auxiliary support plate is driven to move towards the inside the accommodating groove under the action of the electric push rod, the auxiliary support plate is accommodated in the accommodating groove, the inner part of the accommodating groove, the auxiliary support plate is more smoothly moves towards the legs of the user, and the user can rest the legs, and the user can rest the user;

3. through being provided with height-adjusting mechanism, unscrew the fastening stud, upwards pulling pull ring again for the pull ring drives the connecting plate at the inside motion of bedplate body, drives the back board up-and-down motion under the effect of connecting plate, when the connecting plate moves, drives the connecting plate motion under the effect of extension spring, when the back board moves to required height, screw up the fastening stud, fix the surface of pull ring and bedplate body under the effect of fastening stud, thereby fix the surface at the back board, realized the function that the office chair was adjusted to the height of back board, thereby guarantee that the office chair can be according to user's user demand to the height of back board when using and adjust, make the office chair more practical.

Drawings

FIG. 1 is a schematic three-dimensional perspective view of the present utility model;

FIG. 2 is a schematic view of a front cross-sectional structure of the present utility model;

FIG. 3 is a schematic side sectional view of the present utility model;

fig. 4 is an enlarged schematic view of the extension housing mechanism in fig. 3 according to the present utility model.

In the figure: 1. a seat plate body; 101. a backboard; 102. a ventilation screen; 103. an armrest; 104. a support wheel frame; 105. a fixed bottom plate; 106. an auxiliary supporting plate; 107. a control button; 2. relaxing the comfort mechanism; 201. a sponge cushion; 202. a rubber plate; 203. relaxing the comfort portion; 2031. an adhesive plate; 2032. a soft cushion; 2033. a plate body; 3. a height adjusting mechanism; 301. a fastening stud; 302. a pull ring; 303. an adjusting height part; 3031. a connecting plate; 3032. a telescopic spring; 4. a protruding accommodating mechanism; 401. an electric push rod; 402. a receiving groove; 403. a receiving portion extending out; 4031. a bearing plate; 4032. moving the slide block; 4033. ball bearing

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments, and furthermore, the terms "first", "second", "third", "up, down, left, right", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Meanwhile, in the description of the present utility model, unless explicitly stated and defined otherwise, the terms "connected", "connected" and "connected" should be interpreted broadly, and for example, may be fixedly connected, detachably connected, or integrally connected; the mechanical connection and the electrical connection can be adopted; all other embodiments, which may be directly or indirectly through intermediaries, which may be obtained by a person of ordinary skill in the art without inventive effort based on the embodiments of the present utility model are within the scope of the present utility model.

The utility model provides an office chair with an adjustable seat board and backrest, which is shown in fig. 1 and 2, and comprises a seat board body 1, wherein a fixed bottom board 105 is arranged on the surface of the bottom part of the seat board body 1, a supporting wheel frame 104 is arranged on the surface of the bottom part of the fixed bottom board 105, armrests 103 for supporting arm parts of users are arranged on the surfaces of two sides of the fixed bottom board 105, an auxiliary supporting board 106 is arranged in the seat board body 1, a backboard 101 is arranged on the surface of the seat board body 1, a ventilation screen 102 is arranged on the surface of the backboard 101, a control button 107 is arranged on the surface of the seat board body 1, and the model of the control button 107 can be LA series.

Further, as shown in fig. 2 and 3, the surface of the seat plate body 1 is provided with a loosening comfort mechanism 2, the inside of the loosening comfort mechanism 2 comprises a foam pad 201, a rubber plate 202 and a loosening comfort portion 203, the loosening comfort portion 203 is arranged on the surface of the seat plate body 1, the surface of the seat plate body 1 loosens the waist of a user through the loosening comfort portion 203, the loosening comfort portion 203 is composed of a viscose plate 2031, a soft pad 2032 and a plate 2033, the surface of the plate 2033 is provided with the soft pad 2032, the soft pad 2032 is fixed with the surface of the plate 2033 far away from one side of the seat plate body 1, a rubber plate 202 is arranged above the plate 2033, the surface of the bottom of the rubber plate 202 is adhered with the viscose plate 2031, the surface of the viscose plate 2031 is adhered with the surface of the soft pad 2032, the surface of the top of the rubber plate 202 is provided with a foam pad 201, the foam pad 201 is fixed with the surface of the rubber plate 202 far away from one side of the viscose plate 2031, and the foam pad 201 is made of foam material.

During implementation, the surface of the seat board body 1 is more elastic and more comfortable under the action of the board body 2033 and the soft cushion 2032, the adhesion between the rubber board 202 and the soft cushion 2032 is firmer under the action of the adhesion board 2031, the waterproof effect is achieved, cracking is not easy to occur between the rubber board 202 and the soft cushion 2032 during long-time use, cracking is prevented from occurring on the surface of the seat board body 1 under the combined action of the rubber board 202 and the foam cushion 201, a user can relax the buttocks and the waist of the user when sitting on the surface of the foam cushion 201, and the user is not easy to feel tired when sitting for a long time, so that the function of relaxing the buttocks and the waist of the user by the office chair is achieved.

Further, as shown in fig. 3, an adjusting height mechanism 3 is provided between the inside of the seat plate body 1 and the surface of the backboard 101, the adjusting height mechanism 3 is composed of a fastening stud 301, a pull ring 302 and an adjusting height portion 303, the adjusting height portion 303 is provided between the seat plate body 1 and the surface of the backboard 101, the height of the backboard 101 is adjusted by the adjusting height portion 303, the adjusting height portion 303 is composed of a connecting plate 3031 and a telescopic spring 3032, the connecting plate 3031 is provided with the connecting plate 3031 at the bottom position of the backboard 101, one end of the connecting plate 3031 extends to the inside of the seat plate body 1, the telescopic spring 3032 is mounted inside the seat plate body 1, the surface of the telescopic spring 3032 is fixed with the surface of the connecting plate 3031 at the bottom position, the surface of the connecting plate 1 is provided with the pull ring 302, one end of the pull ring 302 extends to the outside of the seat plate body 1, the surface of the seat plate body 1 is provided with a groove body, the pull ring 302 is in sliding fit with the surface of the groove body, the surface of the pull ring 302 is provided with a mounting block at the bottom position of the pull ring 302, the surface of the mounting block is in contact with the surface of the seat plate body 1, and the surface of the mounting block is connected with the surface of the telescopic spring 3032 to the surface of the seat plate body 1, the fastening stud 301 is screwed with the fastening stud 301.

During implementation, the fastening stud 301 is unscrewed, the pull ring 302 is pulled upwards, so that the pull ring 302 drives the connecting plate 3031 to move in the seat plate body 1, the backboard 101 is driven to move up and down under the action of the connecting plate 3031, when the connecting plate 3031 moves, the connecting plate 3031 is driven to move under the action of the telescopic spring 3032, when the backboard 101 moves to a required height, the fastening stud 301 is screwed, the surface of the pull ring 302 and the seat plate body 1 is fixed under the action of the fastening stud 301, and therefore the backboard 101 is fixed on the surface, and the function of adjusting the height of the backboard 101 by the office chair is realized.

Further, as shown in fig. 3 and 4, the seat plate body 1 and the surface of the auxiliary support plate 106 are provided with a protruding accommodation mechanism 4, the inside of the protruding accommodation mechanism 4 comprises an electric push rod 401, an accommodation groove 402 and a protruding accommodation portion 403, the protruding accommodation portion 403 is provided in the seat plate body 1 and the surface of the auxiliary support plate 106, the auxiliary support plate 106 is accommodated in the seat plate body 1 through the protruding accommodation portion 403, the protruding accommodation portion 403 is composed of a bearing plate 4031, a movable slider 4032 and a ball 4033, the inside of the seat plate body 1 is provided with an accommodation groove 402, the accommodation groove 402 is in sliding fit with the surface of the auxiliary support plate 106, the surface at the bottom position of the auxiliary support plate 106 is provided with a bearing plate 4031, the surface at the bottom position of the bearing plate 4031 is provided with a movable slider 4032, the movable slide block 4032 is in sliding fit with the inside of the accommodating groove 402, an electric push rod 401 is installed in the accommodating groove 402, DG series is selected as a model of the electric push rod 401, the input end of the electric push rod 401 is electrically connected with the output end of the control button 107, the output end of the electric push rod 401 is fixed with the surface of the movable slide block 4032, the surface of the movable slide block 4032 is provided with a reinforcing plate, the surface of the reinforcing plate is fixed with the surface of the bottom of the bearing plate 4031, equidistant rolling grooves are formed in the surface of the bottom of the movable slide block 4032, equidistant balls 4033 are arranged on the surface of the movable slide block 4032, the surfaces of the balls 4033 are in mutual rotating fit with the surfaces of the rolling grooves, and the surfaces of the balls 4033 are in contact with the inner wall of the accommodating groove 402.

When the electric push rod 401 in the accommodating groove 402 is controlled to work, the movable slide block 4032 is driven to slide left and right in the accommodating groove 402 under the action of the electric push rod 401, the auxiliary support plate 106 is driven to move left and right in the accommodating groove 402 under the action of the movable slide block 4032, the integral strength of the auxiliary support plate 106 is enhanced under the combined action of the bearing plate 4031 and the reinforcing plate, the bearing strength of the auxiliary support plate 106 is greatly improved, when the movable slide block 4032 moves, at the moment, the ball 4033 rotates on the surface of the rolling groove, the friction force generated when the movable slide block 4032 moves in the accommodating groove 402 is reduced under the combined action of the rolling groove and the ball 4033, the movable slide block 4032 moves in the accommodating groove 402, so that the movable slide block 4032 moves more smoothly in the accommodating groove 402, the auxiliary support plate 106 extends out of the accommodating groove 402, the leg of a user is supported under the action of the auxiliary support plate 106, the sleeping quality of the user is greatly improved when the auxiliary support plate 106 is used up, and the control button 107 is operated, the control button 107 is controlled to work the electric push rod 401 is controlled to move on the surface of the rolling groove, and the auxiliary support plate 106 is driven to move in the accommodating groove 106 under the action of the auxiliary support plate 106, so that the auxiliary support plate 106 extends out of the inside the accommodating groove 106.

Working principle: when the seat board is used, firstly, the seat board body 1 is pushed to the appointed position, a user sits on the surface of the seat board body 1, at this moment, the surface of the seat board body 1 is more elastic and more comfortable under the action of the board body 2033 and the soft cushion 2032, the adhesion between the rubber board 202 and the soft cushion 2032 is firmer under the action of the adhesion board 2031, the waterproof effect is achieved, cracking is not easy to occur between the rubber board 202 and the soft cushion 2032 when the seat board is used for a long time, the surface of the seat board body 1 is prevented from cracking under the combined action of the rubber board 202 and the sponge cushion 201, the user can relax the buttocks and the waist of the user when sitting on the surface of the sponge cushion 201, and the user is not easy to feel tired when sitting for a long time, so that the function of relaxing the buttocks and the waist of the user by the office chair is realized, the comfort degree of the office chair is higher when the office chair is used, and meanwhile, the buttocks and the waist of the user can be effectively relaxed.

The user puts the arm on the surface of the armrest 103, supports the arm of the user under the action of the armrest 103, when the user needs to make noon break, the control button 107 on the surface of the seat plate body 1 is operated, at this time, the control button 107 controls the electric push rod 401 in the accommodating groove 402 to work, the movable slide block 4032 is driven to slide left and right in the accommodating groove 402 under the action of the electric push rod 401, the auxiliary support plate 106 is driven to move left and right in the accommodating part 403 under the action of the movable slide block 4032, the integral strength of the auxiliary support plate 106 is enhanced under the action of the bearing plate 4031 and the reinforcing plate, the bearing strength of the auxiliary support plate 106 is greatly improved, when the movable slide block 4032 moves, the ball 4033 rotates on the surface of the rolling groove, the friction force generated when the movable slide block 4032 moves in the accommodating groove 402 under the action of the rolling groove and the ball 4033 is reduced, the movable sliding block 4032 is enabled to move more smoothly in the accommodating groove 402, so that the auxiliary supporting plate 106 extends out of the accommodating groove 402, the legs of a user are supported under the action of the auxiliary supporting plate 106, the sleeping quality of the user during noon break is greatly improved, after the auxiliary supporting plate 106 is used, the control button 107 is operated, the control button 107 controls the electric push rod 401 to work, the auxiliary supporting plate 106 is driven to move towards the accommodating groove 402 under the action of the electric push rod 401, the auxiliary supporting plate 106 is accommodated in the accommodating groove 402, the function that the auxiliary supporting plate 106 extends out of the office chair is achieved, the legs of the user can be supported when the office chair is used, the legs of the user can be relaxed, and the user can be better helped to rest when the user is at noon break.

Because the height when using is different, the height of backboard 101 needs to be adjusted according to user's demand, at this moment, unscrew fastening stud 301, upwards pulling pull ring 302 again, make pull ring 302 drive connecting plate 3031 at the inside motion of bedplate body 1, drive backboard 101 up-and-down motion under the effect of connecting plate 3031, when connecting plate 3031 moves, drive connecting plate 3031 motion under the effect of extension spring 3032, when backboard 101 moves to required height, fasten fastening stud 301, fix pull ring 302 and bedplate body 1's surface under the effect of fastening stud 301, thereby fix backboard 101 at the surface, with the function of realizing that the office chair adjusts the height of backboard 101, thereby guarantee that the office chair can be adjusted the height of backboard 101 according to user's demand when using, make the office chair more practical, finally accomplish the use work of office chair.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides an office chair with adjustable bedplate and back, includes bedplate body (1), its characterized in that: the utility model provides a seat board, including seat board body (1), fixed baseplate (105) are installed to the surface mounting of seat board body (1) bottom position department, fixed baseplate (105) bottom position department's surface mounting has supporting wheel frame (104), handrail (103) that are used for carrying out the support to user's arm position are all installed to the surface of fixed baseplate (105) both sides, the inside of seat board body (1) is provided with auxiliary support board (106), the surface of seat board body (1) is provided with back board (101), ventilation otter board (102) have been seted up on the surface of back board (101), the surface mounting of seat board body (1) has control button (107), the surface of seat board body (1) is provided with relaxation comfort mechanism (2), the inside of relaxation comfort mechanism (2) includes foam-rubber pad (201), rubber slab (202) and relaxation comfort portion (203), the inside of seat board body (1) and the surface of back board (101) are provided with height-adjusting mechanism (3), height adjusting mechanism (3) are by fastening stud (301), height-adjusting portion (303) and adjusting body (4) are formed, inside of seat board body (1) and electric supporting plate (4) are stretched out and contain extension mechanism (4) and are contained inside (4) extension mechanism (401) A receiving groove (402) and an extending receiving portion (403).

2. An office chair with adjustable seat and backrest as claimed in claim 1, wherein: the utility model discloses a seat board, including seat board body (1), seat board body (2033), comfortable portion of relaxing (203) sets up the surface at seat board body (1), the surface of seat board body (1) is relaxed through comfortable portion of relaxing (203) to user's waist, comfortable portion of relaxing (203) are by gluing glutinous board (2031), cushion (2032) and plate body (2033) constitution, the surface mounting of seat board body (1) top position has plate body (2033), the surface of plate body (2033) is provided with cushion (2032), the surface phase of cushion (2032) and plate body (2033) of keeping away from seat board body (1) one side is fixed.

3. An office chair with adjustable seat and backrest as claimed in claim 2, wherein: the upper portion of plate body (2033) is provided with rubber slab (202), the surface of rubber slab (202) bottom position department glues board (2031), glue glueing the surface of board (2031) and laminating mutually with the surface of cushion (2032), the surface of rubber slab (202) top position department is provided with and is used for foam-rubber cushion (201), foam-rubber cushion (201) are fixed mutually with the surface of rubber slab (202) that keeps away from glues board (2031) one side, the material of foam-rubber cushion (201) is the sponge material.

4. An office chair with adjustable seat and backrest as claimed in claim 1, wherein: the utility model discloses a seat board, including seat board body (1), back board (101), height-adjusting portion (303), back board (101) are located, height-adjusting portion (303) set up the surface at seat board body (1) and back board (101), height-adjusting portion (303) are adjusted through height-adjusting portion (303), height-adjusting portion (303) comprises connecting plate (3031) and extension spring (3032), surface mounting of back board (101) bottom position department has connecting plate (3031), the inside that one end of connecting plate (3031) extends to seat board body (1), the internally mounted of seat board body (1) has extension spring (3032), the surface of extension spring (3032) top position department is fixed with the surface of connecting plate (3031) bottom position department mutually, the surface mounting of connecting plate (3031) has pull ring (302).

5. An office chair with adjustable seat and backrest as claimed in claim 1, wherein: one end of pull ring (302) extends to the outside of bedplate body (1), the cell body has been seted up on the surface of bedplate body (1), the surface of pull ring (302) and cell body sliding fit each other, the surface mounting of pull ring (302) bottom position department has the installation piece, and the surface of installation piece contacts with the surface of bedplate body (1) to the surface threaded connection of installation piece has fastening double-screw bolt (301) that are used for fixing the surface of pull ring (302) and bedplate body (1), the one end of fastening double-screw bolt (301) runs through the installation piece and with the surface thread tightening of bedplate body (1).

6. An office chair with adjustable seat and backrest as claimed in claim 1, wherein: the seat plate comprises a seat plate body (1), an extending accommodating part (403) and an auxiliary supporting plate (106), wherein the extending accommodating part (403) is arranged in the seat plate body (1) and on the surface of the auxiliary supporting plate (106), the auxiliary supporting plate (106) is used for carrying out retraction processing through the extending accommodating part (403), the extending accommodating part (403) is composed of a bearing plate (4031), a movable sliding block (4032) and a ball (4033), an accommodating groove (402) is formed in the seat plate body (1), the accommodating groove (402) is in sliding fit with the surface of the auxiliary supporting plate (106), and the bearing plate (4031) is arranged on the surface of the bottom position of the auxiliary supporting plate (106).

7. An office chair with adjustable seat and backrest as claimed in claim 6 wherein: the surface mounting of bearing plate (4031) bottom position department has and removes slider (4032), the inside of removing slider (4032) and accepting groove (402) is sliding fit each other, the internally mounted of accepting groove (402) has electric putter (401), the input of electric putter (401) is fixed with the surface of removing slider (4032) with the output electric connection of control button (107), the reinforcing plate is all installed to the surface of removing slider (4032), and the surface of reinforcing plate is fixed with the surface of bearing plate (4031) bottom position department.

8. An office chair with adjustable seat and backrest as claimed in claim 7 wherein: equidistant rolling grooves are formed in the surfaces of the bottom positions of the movable sliding blocks (4032), equidistant balls (4033) are arranged on the surfaces of the movable sliding blocks (4032), the balls (4033) are in mutual rotation fit with the surfaces of the rolling grooves, and the surfaces of the balls (4033) are in contact with the inner walls of the accommodating grooves (402).