CN110897401B

CN110897401B - Office soft seat

Info

Publication number: CN110897401B
Application number: CN201911268636.3A
Authority: CN
Inventors: 黄金亮; 刘兵兵
Original assignee: Guangzhou Kuohu Electronic Products Co ltd
Current assignee: Guangzhou Kuohu Electronic Products Co ltd
Priority date: 2019-12-11
Filing date: 2019-12-11
Publication date: 2023-05-05
Anticipated expiration: 2039-12-11
Also published as: CN110897401A

Abstract

The invention relates to a seat, in particular to an office soft seat. The technical problem is how to provide an office soft seat with mechanical adjustment and high safety. An office soft seat comprises a rolling frame, a support, a column sleeve, a mounting column, a sliding block, a first mounting plate, a seat body and the like; the top of the rolling frame is provided with a support, the support is provided with a column sleeve, the inner wall of the column sleeve is symmetrically provided with sliding grooves, the side wall of the mounting column is symmetrically provided with sliding blocks, the mounting column is slidably mounted with the sliding grooves in the column sleeve through the sliding blocks, the column sleeve is provided with a main adjusting mechanism for adjusting the height of the seat, and the mounting column passes through the main adjusting mechanism and is connected with a first mounting plate. The invention achieves the effects of high safety and convenient adjustment.

Description

Office soft seat

Technical Field

The invention relates to a seat, in particular to an office soft seat.

Background

Office chairs are single-person chairs for indoor use, the swivel chairs are office chairs with horizontally rotatable seat surfaces and are divided into two main types according to the adjustment mode of the office chairs, one type is office chairs with adjustable seat and backrest, but only the backrest angle is adjustable, and the other type is office chairs with non-adjustable backrest, the seat surfaces and the armrests are not adjustable in relative positions and angles.

Along with the rapid development of modern society, people spend more and more in the office, and office seat, meeting room all use soft seat basically, and present soft seat height adjustment is simple cylinder regulation, and the phenomenon of explosion can appear in the live time too long, causes human injury, consequently, designs a mechanical regulation, the high office soft seat of security to solve the not enough of prior art.

Disclosure of Invention

In order to overcome the defects that the prior soft seat is simple in height adjustment of an air cylinder and can explode after long service time, and human body injury is caused, the technical problems are as follows: provides an office soft seat with high mechanical adjustment and safety.

The technical proposal is as follows: the utility model provides an office soft seat, including rolling frame, the support, the column jacket, the erection column, the sliding block, first mounting panel, the seat body, main adjustment mechanism and auxiliary adjustment mechanism, the rolling frame top is provided with the support, be provided with the column jacket on the support, the spout is opened to column jacket inner wall symmetry, erection column lateral wall symmetry is provided with the sliding block, the erection column passes through the sliding block and installs with the spout slidingtype in the column jacket, be provided with the main adjustment mechanism to seat altitude mixture control on the column jacket, pass main adjustment mechanism on the erection column and be connected with first mounting panel, be provided with the seat body on the first mounting panel, be provided with the auxiliary adjustment mechanism to seat altitude mixture control on the main adjustment mechanism.

Further, the main regulation mechanism is including the mounting box, the fixed plate, the cylinder box, the bearing frame, the axis of rotation, the carousel, the swinging arms, the installation piece, the ratchet, pawl, dead lever and first elastic component, be provided with the mounting box on the column jacket, be provided with the fixed plate on the mounting box lateral wall, the fixed plate opposite side is provided with the cylinder box, open at cylinder box top has the arc wall, be provided with the bearing frame on the fixed plate, be provided with the axis of rotation on the bearing frame, axis of rotation one end is passed cylinder box lateral wall and is connected with the carousel, be provided with the swinging arms on the carousel circumference edge lateral wall, the swinging arms passes the arc wall, the symmetry evenly is provided with the ratchet on the erection column lateral wall, the ratchet is in 90 setting with the sliding block, the column jacket symmetry that is in same vertical plane with the ratchet is opened square hole, the axis of rotation other end is provided with the installation piece, the symmetry rotation is provided with the pawl on the installation piece, pawl and ratchet cooperation, pawl keep away from cylinder box one side all is provided with the dead lever, be provided with first elastic component between the two dead levers.

Further, vice adjustment mechanism is including the second mounting panel, first movable rod, the ball, the second elastic component, first mount pad, the cylindricality cover, the lifter, the third elastic component, the clamp plate, extrusion piece and second movable rod, be provided with the second mounting panel on the lateral wall that the cylinder box was kept away from to the mounting box, the second mounting panel is opened with a word hole on the lateral wall that the mounting box is connected, the symmetry is opened on the second mounting panel has a word hole, a word hole of second mounting panel and a word hole intercommunication on the mounting box lateral wall, it has the square groove to open in the second mounting panel, square groove both sides wall symmetry on the second mounting panel is opened there is the through-hole, both sides through-hole respectively with a word hole intercommunication in both sides, the movable first movable rod that is provided with in the through-hole, the one end that the first movable rod is close to the square groove is connected with the ball, be provided with the second elastic component between ball and the second mounting panel square groove lateral wall, the first movable rod other end is connected with the second movable rod, the second movable rod is located a word hole, one end in the mounting box is located between pawl and the installation post, be provided with a square groove on the second mounting panel, first mount pad is provided with the top of the cylinder cover, the cylinder cover is connected with the cylinder cover, the top is connected with the cylinder cover in the cylinder cover, the cylinder cover is located the top.

Further, still including U-shaped guide arm, the sliding sleeve, the footboard, the bull stick, the disc, the connecting rod, the second mount pad, the pivot, the bevel gear, belt conveying mechanism, first casing and second casing, be provided with the U-shaped guide arm on the support, sliding type is provided with two sliding sleeves on the U-shaped guide arm, be provided with the footboard between two sliding sleeves, the column jacket is gone up the rotation and is provided with the bull stick, be provided with the disc on the bull stick, the disc eccentric position articulates and is connected with the connecting rod, articulated connection between connecting rod and the sliding sleeve of same one side, be provided with the second mount pad on the second mounting panel, the second mount pad is located between first mount pad and the mounting box, be provided with the pivot on the second mount pad, all interference connection has the bevel gear on pivot and the column jacket, be provided with belt conveying mechanism between pivot and the bull stick, the second mounting panel downside is provided with first casing, first casing parcel belt conveying mechanism downside's big belt pulley, second mounting panel upside is provided with the second casing, the second casing parcel bevel gear and belt pulley of belt conveying mechanism downside.

Further, still including uide bushing, the depression bar, the fourth elastic component, the slip cap, the connecting rod, the arc kicking block, the guide holder, the draw-bar, the fifth elastic component, the installation cover, stay cord and kicking ball, be provided with the uide bushing on the lateral wall that the cylinder box is close to the installation box, sliding type is provided with the depression bar in the uide bushing, the depression bar top is provided with the kicking ball, fourth elastic component between kicking ball and the uide bushing, sliding type is provided with the slip cap on the swinging arms, the slip cap is connected with the arc kicking block through the connecting rod, arc kicking block and kicking ball contact, the fixed plate top is provided with the guide holder, be provided with the installation cover on the lateral wall that the cylinder box is close to the installation box, sliding type is provided with the draw-bar in the installation cover, vertical direction evenly opens the jack on the installation post, be provided with the fifth elastic component between draw-bar and the installation cover inner tip, the one end that the draw-bar is close to the cylinder box is connected with the stay cord, the stay cord other end passes the installation cover and the depression bar bottom to be connected, the one end that the draw-bar kept away from the cylinder box passes the installation cover, the installation box card is gone into the jack of installation post.

The beneficial effects of the invention are as follows: the invention achieves the effects of high safety and convenient adjustment, and a user can realize the separation of the clamping rod and the jack by downwards moving the sliding sleeve, thereby being convenient for the height adjustment of the seat body. Through back and forth swing slip cap, drive swinging arms back and forth through the slip cap and swing, realize the regulation to the seat body height that makes progress, through pushing down the clamp plate, can realize the regulation to the seat body height that makes progress, can realize the position movement to the footboard through rotatory cylindricality cover, this device convenient operation, the security is high.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic perspective view of a first embodiment of a main adjusting mechanism of the present invention.

Fig. 3 is a schematic view of a second perspective structure of the main adjusting mechanism of the present invention.

Fig. 4 is a schematic perspective view of the secondary adjusting mechanism of the present invention.

Fig. 5 is a schematic view of a partial perspective structure of the present invention.

Part names and serial numbers in the figure: 1: rolling frame, 2: support, 3: column jacket, 4: mounting column, 5: sliding block, 6: first mounting plate, 7: seat body, 8: main adjustment mechanism, 81: mounting box, 82: fixing plate, 83: cylindrical box, 84: bearing housing, 85: rotation shaft, 86: carousel, 87: swing lever, 88: mounting block, 89: ratchet, 810: pawl, 811: fixing rod, 812: first elastic member, 9: secondary adjustment mechanism, 91: second mounting plate, 92: a straight hole, 93: first movable lever, 94: ball, 95: second elastic member, 96: first mount, 97: cylindrical sleeve, 98: lifter, 99: third elastic member, 910: platen, 911: extrusion block, 912: second movable lever, 10: u-shaped guide arm, 11: sliding sleeve, 111: pedal, 12: rotating rod, 13: disc, 14: connecting rod, 15: second mount, 16: rotating shaft, 17: bevel gear, 18: belt conveyor, 19: first housing, 20: second housing, 21: guide sleeve, 22: compression bar, 23: fourth elastic member, 24: sliding sleeve, 25: connecting rod, 26: arc kicking block, 27: guide holder, 28: clamping rod, 29: fifth elastic member, 30: mounting sleeve, 31: pull rope, 32: and (5) ball pushing.

Detailed Description

The present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which currently preferred embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

Example 1

As shown in figures 1-5, an office soft seat comprises a rolling frame 1, a support 2, a column sleeve 3, a mounting column 4, a sliding block 5, a first mounting plate 6, a seat body 7, a main adjusting mechanism 8 and an auxiliary adjusting mechanism 9, wherein the support 2 is arranged at the top of the rolling frame 1, the column sleeve 3 is arranged on the support 2 in an interference connection mode, sliding grooves are symmetrically formed in the inner wall of the column sleeve 3, the sliding block 5 is symmetrically arranged on the side wall of the mounting column 4, the mounting column 4 is slidably mounted with the sliding grooves in the column sleeve 3 through the sliding block 5, the main adjusting mechanism 8 for adjusting the height of the seat is arranged on the column sleeve 3, the first mounting plate 6 is connected with the first mounting plate 6 through the main adjusting mechanism 8, the seat body 7 is arranged on the first mounting plate 6, and the auxiliary adjusting mechanism 9 for adjusting the height of the seat is arranged on the main adjusting mechanism 8.

The main regulating mechanism 8 comprises a mounting box 81, a fixing plate 82, a cylindrical box 83, a bearing seat 84, a rotating shaft 85, a rotary disc 86, a swinging rod 87, a mounting block 88, ratchets 89, pawls 810, a fixing rod 811 and a first elastic piece 812, wherein the mounting box 81 is arranged on a column sleeve 3 in a bolt connection mode, the fixing plate 82 is arranged on one side wall of the mounting box 81, the cylindrical box 83 is arranged on the other side of the fixing plate 82, an arc-shaped groove is formed in the top of the cylindrical box 83, the bearing seat 84 is arranged on the fixing plate 82, the rotating shaft 85 is arranged on the bearing seat 84, one end of the rotating shaft 85 penetrates through one side wall of the cylindrical box 83 to be connected with the rotary disc 86, the swinging rod 87 is arranged on the circumferential edge side wall of the rotary disc 86, the swinging rod 87 penetrates through the arc-shaped groove, ratchets 89 are symmetrically and uniformly arranged on the side wall of the mounting column 4, the ratchets 89 and the sliding piece 5 form 90 DEG, square holes are symmetrically arranged on the column sleeve 3 which is positioned on the same vertical surface with the ratchets 89, the other end of the rotating shaft 85 is provided with the mounting block 88, the pawls 810 are symmetrically arranged on the

mounting block

88, 810 are matched with the ratchets 810, one side of the pawls 810 is far away from the cylindrical box 83, one side of the fixing rod is connected with the rotary disc 86, the rotary disc is provided with the elastic piece 811, the first elastic piece 812 is arranged between the two elastic pieces 811, and the first elastic piece 812 is arranged between the fixing rod 811.

The auxiliary adjusting mechanism 9 comprises a second mounting plate 91, a first moving rod 93, a ball 94, a second elastic piece 95, a first mounting seat 96, a cylindrical sleeve 97, a lifting rod 98, a third elastic piece 99, a pressing plate 910, an extrusion block 911 and a second moving rod 912, wherein the second mounting plate 91 is arranged on the side wall of the mounting box 81 far away from the cylindrical box 83, a straight hole 92 is symmetrically arranged on the side wall of the second mounting plate 91 connected with the mounting box 81, a straight hole 92 is symmetrically arranged on the second mounting plate 91, the straight hole 92 of the second mounting plate 91 is communicated with the straight hole 92 on the side wall of the mounting box 81, square grooves are formed in the second mounting plate 91, through holes are symmetrically arranged on the two side walls of the square groove on the second mounting plate 91, the through holes on the two sides are respectively communicated with the straight holes 92 on the two sides, a first moving rod 93 is movably arranged in the through holes, one end of the first moving rod 93 close to the square groove is connected with the ball 94, a second elastic piece 95 is arranged between the round ball 94 and the side wall of the square groove of the second mounting plate 91, the second elastic piece 95 is a compression spring, the other end of the first moving rod 93 is connected with a second moving rod 912, the second moving rod 912 is positioned in the straight hole 92, one end of the second moving rod 912 in the mounting box 81 is positioned between the pawl 810 and the mounting column 4, a first mounting seat 96 is arranged on the second mounting plate 91, the first mounting seat 96 is positioned right above the square groove, a cylindrical sleeve 97 is rotatably arranged on the first mounting seat 96, a lifting rod 98 is slidably arranged in the cylindrical sleeve 97, a pressing plate 910 is arranged at the top end of the lifting rod 98, a third elastic piece 99 is arranged between the pressing plate 910 and the cylindrical sleeve 97, the third elastic piece 99 is a compression spring, and the other end of the lifting rod 98 penetrates through the second mounting plate 91 to be connected with a squeezing block 911, and the squeezing block 911 is in contact fit with the round ball 94.

When the user needs to carry out the altitude mixture control, the user only needs to make a round trip to promote swinging arms 87, and swinging arms 87 drive installation piece 88 swing through axis of rotation 85, and installation piece 88 cooperates with ratchet 89 on the erection column 4 each other through two pawls 810, and then drives erection column 4 and the first mounting panel 6 on the erection column 4 and seat body 7 upward movement together, and pawl 810 can cooperate with ratchet 89 all the time under the elastic force of first elastic component 812, pawl 810. When the height of the seat body 7 needs to be adjusted downwards, a user downwards presses the pressing plate 910, the pressing plate 910 drives the pressing block 911 to downwards move through the lifting rod 98, the third elastic piece 99 is compressed, the pressing block 911 presses the round ball 94, the round ball 94 drives the second moving rod 912 to do back movement through the first moving rod 93, the second elastic piece 95 is compressed, the second moving rod 912 dials the pawl 810 to two sides, the first elastic piece 812 is stretched, the mounting column 4, the first mounting plate 6 and the seat body 7 slide downwards under the action of gravity, when the user releases the pressing plate 910, the third elastic piece 99 drives the pressing plate 910 to upwards move and reset, the pressing block 911 resets, then the second elastic piece 95 drives the first moving rod 93 to reset, the second moving rod 912 resets, and then the first elastic piece 812 drives the pawl 810 to be matched with the ratchet 89, and the mounting column 4 is fixed.

Example 2

On the basis of embodiment 1, as shown in fig. 1, 3 and 5, the belt conveyer further comprises a U-shaped guide rod 10, a sliding sleeve 11, a pedal 111, a rotating rod 12, a disc 13, a connecting rod 14, a second mounting seat 15, a rotating shaft 16, bevel gears 17, a belt conveyer 18, a first housing 19 and a second housing 20, wherein the U-shaped guide rod 10 is arranged on the support 2, the sliding sleeves 11 are slidably arranged on the U-shaped guide rod 10, the pedal 111 is arranged between the two sliding sleeves 11, the rotating rod 12 is rotatably arranged on the column sleeve 3, the disc 13 is arranged on the rotating rod 12 in an interference connection mode, the connecting rod 14 is hinged at the eccentric position of the disc 13, the connecting rod 14 is hinged with the sliding sleeve 11 on the same side, the second mounting plate 91 is provided with a second mounting seat 15, the second mounting seat 15 is positioned between the first mounting seat 96 and the mounting box 81, the rotating shaft 16 and the cylindrical sleeve 97 are both connected with the bevel gears 17 in an interference manner, the belt conveyer 18 is arranged between the rotating shaft 16 and the rotating rod 12, the lower side of the second mounting plate 91 is provided with the first housing 19, the lower side of the first housing 19 is wrapped by the belt conveyer 18, and the lower side of the second housing 20 is wrapped by the belt conveyer 20.

When a user needs to place feet on the pedal 111, the user can rotate the cylindrical sleeve 97, so that the cylindrical sleeve 97 is matched through the bevel gear 17 to drive the rotating shaft 16 to rotate clockwise, the rotating shaft 16 drives the rotating rod 12 to rotate through the belt conveying mechanism 18, then drives the disc 13 to rotate clockwise, the disc 13 pushes the sliding sleeve 11 to move through the connecting rod 14, then drives the pedal 111 to move, and when the pedal 111 needs to be driven to reset, the cylindrical sleeve 97 is reversely rotated.

The novel telescopic hydraulic jack is characterized by further comprising a guide sleeve 21, a compression rod 22, a fourth elastic piece 23, a sliding sleeve 24, a connecting rod 25, an arc-shaped jacking block 26, a guide seat 27, a clamping rod 28, a fifth elastic piece 29, a mounting sleeve 30, a pull rope 31 and a jacking ball 32, wherein the guide sleeve 21 is arranged on the side wall of the cylindrical box 83, which is close to the mounting box 81, the compression rod 22 is arranged in the guide sleeve 21 in a sliding manner, the jacking ball 32 is arranged at the top end of the compression rod 22, the fourth elastic piece 23 is a compression spring, the sliding sleeve 24 is arranged on the swinging rod 87 in a sliding manner, the arc-shaped jacking block 26 is connected with the arc-shaped jacking ball 32 through the connecting rod 25, the top of the fixing plate 82 is provided with the guide seat 27, the cylindrical box 83 is provided with the mounting sleeve 30 on the side wall, which is close to the mounting box 81, the clamping rod 28 is arranged in a sliding manner, a jack is uniformly arranged in the vertical direction on the mounting column 4, a fifth elastic piece 29 is arranged between the clamping rod 28 and the inner end part of the mounting sleeve 30, the fifth elastic piece 29 is a compression spring, the clamping rod 28 is connected with one end, which is far from the end of the clamping rod 28, which is connected with the clamping rod 31, which passes through the mounting box 31, and penetrates through the cylindrical box 30, and penetrates through the mounting box 30, and is far from the end of the mounting box 31.

When the height of the seat body 7 needs to be adjusted, a user moves the sliding sleeve 24 downwards, the sliding sleeve 24 drives the arc-shaped top block 26 to move downwards through the connecting rod 25, the arc-shaped top block 26 extrudes the top ball 32, the top ball 32 drives the pressing rod 22 to move downwards, the fifth elastic piece 29 is compressed, the pressing rod 22 pulls the clamping rod 28 to move inwards towards the mounting sleeve 30 through the pull rope 31, the fifth elastic piece 29 is compressed, the clamping rod 28 leaves the jack, at the moment, when the user adjusts the height of the seat body 7 upwards, the sliding sleeve 24 can continuously move back and forth, the sliding sleeve 24 drives the swinging rod 87 to swing, then the upward adjustment height is realized, the arc-shaped top block 26 always contacts with the top ball 32 in the swinging process, when the height of the seat body 7 needs to be adjusted downwards, the auxiliary adjusting mechanism 9 is repeatedly used for adjusting, after the adjustment is completed, the user releases the sliding sleeve 24, the fourth elastic piece 23 drives the top ball 32 to reset, then drives the arc-shaped top block 26 to reset, the pressing rod 22 resets to drive the pull rope 31 to move upwards to be in a loose state, the fifth elastic piece 29 drives the clamping rod 28 to clamp into the initial jack, the initial jack 31 is restored to the state, the seat body 7 is convenient to adjust, and the service life of the seat is prolonged.

The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims

1. The office soft seat comprises a rolling frame (1), a support (2) and a column sleeve (3), wherein the support (2) is arranged at the top of the rolling frame (1), the column sleeve (3) is arranged on the support (2), the office soft seat is characterized by further comprising a mounting column (4), a sliding block (5), a first mounting plate (6), a seat body (7), a main adjusting mechanism (8) and an auxiliary adjusting mechanism (9), sliding grooves are symmetrically formed in the inner wall of the column sleeve (3), the sliding block (5) is symmetrically arranged on the side wall of the mounting column (4), the mounting column (4) is slidably arranged through the sliding blocks (5) and the sliding grooves in the column sleeve (3), the main adjusting mechanism (8) for adjusting the height of the seat is arranged on the column sleeve (3), the first mounting plate (6) penetrates through the main adjusting mechanism (8) to be connected with the first mounting plate (6), the seat body (7) is arranged on the main adjusting mechanism (8), and the auxiliary adjusting mechanism (9) for adjusting the height of the seat is arranged on the main adjusting mechanism (8). The main adjusting mechanism (8) comprises an installing box (81), a fixing plate (82), a cylindrical box body (83), a bearing seat (84), a rotating shaft (85), a rotary disc (86), a swinging rod (87), an installing block (88), ratchets (89), pawls (810), a fixing rod (811) and a first elastic piece (812), wherein the installing box (81) is arranged on a column sleeve (3), the fixing plate (82) is arranged on one side wall of the installing box (81), the other side of the fixing plate (82) is provided with the cylindrical box body (83), the top of the cylindrical box body (83) is provided with an arc-shaped groove, the fixing plate (82) is provided with the bearing seat (84), the bearing seat (84) is provided with the rotating shaft (85), one end of the rotating shaft (85) penetrates through the rotary disc (86) on one side wall of the cylindrical box body (83), the swinging rod (87) is arranged on the circumferential edge side wall of the rotary disc (86), the swinging rod (87) penetrates through the arc-shaped groove, the ratchets (89) are symmetrically and uniformly arranged on the side wall of the installing column (4), the ratchets (89) and the sliding block (5) are arranged at 90 DEG, the rotating shaft (85) is provided with a symmetrical rotating shaft (88) on the same vertical plane with the side of the ratchets (89), the installation piece (88) is gone up symmetry rotation and is provided with pawl (810), pawl (810) and ratchet (89) cooperation, and pawl (810) are kept away from cylinder box (83) one side and all are provided with dead lever (811), are provided with first elastic component (812) between two dead levers (811).

2. The office chair according to claim 1, wherein the auxiliary adjusting mechanism (9) comprises a second mounting plate (91), a first moving rod (93), a round ball (94), a second elastic piece (95), a first mounting seat (96), a cylindrical sleeve (97), a lifting rod (98), a third elastic piece (99), a pressing plate (910), a pressing block (911) and a second moving rod (912), wherein the side wall of the mounting box (81) far away from the cylindrical box body (83) is provided with the second mounting plate (91), the side wall of the second mounting plate (91) connected with the mounting box (81) is symmetrically provided with a first character hole (92), the second mounting plate (91) is symmetrically provided with a first character hole (92), the first character hole (92) of the second mounting plate (91) is communicated with the first character hole (92) on the side wall of the mounting box (81), the second mounting plate (91) is internally provided with square grooves, the two side walls of the square grooves on the second mounting plate (91) are symmetrically provided with through holes, the two side through holes are respectively communicated with the two side character holes (92), the first moving rod (93) is arranged in the through holes, the first side wall (91) is close to the second round groove (95) and the round ball is arranged between the first round ball and the second mounting plate (93), the utility model discloses a ball, including first movable rod (93), the other end is connected with second movable rod (912), second movable rod (912) is located a word hole (92), one end of second movable rod (912) in mounting box (81) is located between pawl (810) and erection column (4), be provided with first mount pad (96) on second mounting panel (91), first mount pad (96) are located square groove directly over, be provided with cylindricality cover (97) on first mount pad (96), sliding type is provided with lifter (98) in cylindricality cover (97), lifter (98) top is provided with clamp plate (910), be provided with third elastic component (99) between clamp plate (910) and cylindricality cover (97), the other end of lifter (98) passes second mounting panel (91) and is connected with extrusion piece (911), extrusion piece (911) and ball (94) contact cooperation.

3. An office chair according to claim 2, further comprising a U-shaped guide rod (10), a sliding sleeve (11), a pedal (111), a rotating rod (12), a disc (13), a connecting rod (14), a second mounting seat (15), a rotating shaft (16), a bevel gear (17), a belt conveying mechanism (18), a first shell (19) and a second shell (20), wherein the U-shaped guide rod (10) is arranged on the support (2), two sliding sleeves (11) are slidably arranged on the U-shaped guide rod (10), a pedal (111) is arranged between the two sliding sleeves (11), the rotating rod (12) is rotatably arranged on the column sleeve (3), a disc (13) is arranged on the rotating rod (12), a connecting rod (14) is hinged at the eccentric position of the disc (13), the connecting rod (14) is hinged with the sliding sleeve (11) on the same side, the second mounting plate (91) is provided with the second mounting seat (15), the second mounting seat (15) is positioned between the first mounting seat (96) and the mounting box (81), the rotating shaft (16) is arranged on the second mounting seat (15), the rotating shaft (16) is meshed with the bevel gear (17) on the rotating shaft (97) and the bevel gear (17), be provided with belt conveying mechanism (18) between pivot (16) and bull stick (12), second mounting panel (91) downside is provided with first casing (19), and big belt pulley of first casing (19) parcel belt conveying mechanism (18) downside is provided with second casing (20) on second mounting panel (91), and bevel gear (17) and belt conveying mechanism (18) downside's belt pulley are wrapped to second casing (20).

4. An office chair according to claim 3, further comprising a guide sleeve (21), a compression bar (22), a fourth elastic piece (23), a sliding sleeve (24), a connecting rod (25), an arc-shaped jacking block (26), a guide seat (27), a clamping rod (28), a fifth elastic piece (29), a mounting sleeve (30), a pull rope (31) and a jacking ball (32), wherein the side wall of a cylindrical box body (83) close to the mounting box (81) is provided with the guide sleeve (21), the compression bar (22) is arranged in the sliding manner, the jacking ball (32) is arranged at the top end of the compression bar (22), the sliding sleeve (24) is arranged between the jacking ball (32) and the guide sleeve (21) in a sliding manner, the arc-shaped jacking block (26) is connected with the connecting rod (25), the arc-shaped jacking block (26) is contacted with the jacking ball (32), the top of a fixing plate (82) is provided with the guide seat (27), the side wall of the cylindrical box body (83) close to the mounting box (81) is provided with the jacking ball (32), the clamping sleeve (30) is arranged in the sliding manner, the sliding sleeve (28) is arranged in the sliding manner in the vertical direction (4), a fifth elastic piece (29) is arranged between the clamping rod (28) and the inner end part of the mounting sleeve (30), one end, close to the cylindrical box body (83), of the clamping rod (28) is connected with a pull rope (31), the other end of the pull rope (31) penetrates through the mounting sleeve (30) to be connected with the bottom end of the compression rod (22), and one end, far away from the cylindrical box body (83), of the clamping rod (28) penetrates through the mounting sleeve (30) and the mounting box (81) to be clamped into an inserting hole of the mounting column (4).