A seat with linkage adjustment function

Abstract

The present invention discloses a chair armrest with linkage adjustment function, including a left armrest and a right armrest, wherein the left armrest and the right armrest both include an armrest portion, an armrest seat, a sleeve and a connecting arm assembled together, wherein the connecting arm is fixedly connected to the side of the chassis structure, and the chassis structure is provided with a free adjustment structure for adjusting the inclination angle of the chair back and a lifting adjustment structure for adjusting the height of the chassis; the invention is characterized in that switches are respectively provided on the left armrest and the right armrest, one of the switches is connected to the free adjustment structure through a gate line, and the other switch is connected to the lifting adjustment structure through a gate line. The present invention has good running stability, and the inclination angle of the chair back and the height of the chassis can be adjusted by pressing a switch on the armrest, and the operation is very simple.

Description

Technical Field

[0001] The invention relates to the technical field of seats, and in particular to a seat with a linkage adjustment function. Background Art

[0002] With the improvement of living standards, people have put forward higher and higher requirements for seat comfort. A swivel chair that can be raised, lowered, tilted and rotated has gradually become a new favorite.

[0003] Refer to the Chinese invention patent with application number 201920359514.4, which discloses a swivel chair chassis structure, including a bottom plate fixed to the bottom of the swivel chair cushion, a bottom shell installed on the lower side of the bottom plate, a top cover arranged on the bottom shell, and a tail plate linked to the backrest. The chassis structure also includes a leisure force adjustment structure and a lifting function structure; track holes are provided on both sides of the bottom shell, and the leisure force adjustment structure includes a T-shaped spring fixing rod arranged in the bottom shell, which can pass through the track hole and be connected to the bottom plate. The spring fixing rod includes a transverse rod part and a longitudinal rod part. The transverse rod part passes through the track hole and is connected to the bottom plate. The leisure force adjustment structure also includes a compression spring with resilience arranged outside the longitudinal rod part. When the backrest is tilted, the tail plate is driven to move up and down, and the up and down movement of the tail plate drives the bottom shell to move. When the bottom shell moves, the track hole can move along the transverse rod part and compress the compression spring. The compression spring has resilience on the bottom shell and resets the bottom shell so that the tail plate and the backrest return to their positions. However, when adjusting the tilt angle and chassis height, the user still needs to bend down and adjust the corresponding adjustment components, which makes the operation not simple and quick enough. Summary of the invention

[0004] The purpose of the present invention is to solve the deficiencies of the prior art and to provide a chair armrest with a linkage adjustment function, which can adjust the swing angle and the lifting height by simply pressing a switch on the armrest.

[0005] The present invention adopts the following technical solutions to achieve the above purpose:

[0006] A seat with a linkage adjustment function comprises a seat body, a left armrest and a right armrest installed on the seat body; the seat body is provided with a remote control structure for adjusting the inclination angle of the seat back and a lifting and lowering adjustment structure for adjusting the height of the seat; it is characterized in that switches are respectively provided on the left armrest and the right armrest, one of the switches is control-connected to the remote control structure through a gate line, and the other switch is control-connected to the lifting and lowering adjustment structure through a gate line.

[0007] More preferably, the left armrest and the right armrest both include an armrest seat and a connecting arm assembled together, and the connecting arm is fixedly connected to the side of the chassis structure of the seat body; the switch includes a longitudinal hinge column and a transverse press plate connected together, and the longitudinal hinge column is hinged to the armrest seat; one end of the brake wire is fixed to the longitudinal hinge column or the transverse press plate, and the other end of the brake wire is connected to the starting switch of the leisure adjustment structure or the lifting adjustment structure.

[0008] More preferably, the armrest seat includes an armrest seat surface cover and an armrest seat bottom cover assembled together, the longitudinal hinged column is arranged in the armrest seat bottom cover, and the transverse press plate extends through the outer wall of the armrest seat bottom cover; the connecting arm is a hollow arm, and the brake line is led to the bottom of the chassis structure through the inner cavity of the hollow arm.

[0009] More preferably, a wire groove for the brake wire to pass through is opened in the connecting arm.

[0010] More preferably, a sleeve is installed at the bottom of the armrest seat, and the sleeve and the connecting arm form a liftable sleeve structure; a lifting device for adjusting the height of the armrest seat is provided between the armrest seat and the connecting arm.

[0011] More preferably, the lifting device comprises: an articulated seat fixedly connected to the armrest seat, and a lifting push piece articulated to the articulated seat, and the lifting push piece comprises a transverse push head and a longitudinal support rod connected together.

[0012] The installation structure of the lifting device is as follows: a cavity for accommodating the longitudinal support rod is opened in the connecting arm, and a plurality of groups of locking protrusions are arranged inside the cavity along the vertical direction; the transverse pressing head is hinged to one end of the longitudinal support rod, and the other end of the longitudinal support rod is provided with a locking groove that cooperates with the locking protrusion.

[0013] More preferably, the sleeve is provided with a first through hole for the transverse pressing head to pass through.

[0014] More preferably, a sliding device for adjusting the front and rear position of the armrest seat is provided between the armrest seat and the hinge seat; the sliding device includes: a slide groove provided inside the armrest seat, a slider provided in the slide groove, a hollow groove provided at the bottom of the slide groove, and a first column provided at the top of the hinge seat; the first column is fixed to the slider after passing through the hollow groove.

[0015] More preferably, several groups of arc-shaped positioning grooves are provided on both sides of the slide groove, and a movable key position, a positioning key slidably connected to the movable key position, and a return spring connected to the positioning key are provided on the sliding block, and the positioning key is pressed and assembled with the arc-shaped positioning groove under the action of the return spring.

[0016] More preferably, a first connecting position is provided on the sliding block, and a first fixing block cooperating with the first column is arranged in the first connecting position; a steering structure for adjusting the angle of the armrest seat is arranged between the first connecting position and the first fixing block; the steering structure includes: directional key slots arranged on both sides of the first connecting position, directional keys cooperating with the directional key slots, and a plurality of groups of directional slots arranged on the side of the first fixing block and cooperating with the directional keys.

[0017] More preferably, a junction box is also fixed on the seat body, and a push-reset mechanism and a stroke adjustment mechanism connected together are provided in the junction box. The push-reset mechanism is connected to the starting switch of the leisure adjustment structure or the lifting adjustment structure and has two different working positions. The stroke adjustment mechanism is connected to the gate wire and can release connecting wires of different lengths according to the length of the gate wire.

[0018] The beneficial effects that can be achieved by the present invention using the above technical solution are:

[0019] 1. The present invention respectively arranges switches for controlling the walking adjustment structure and the lifting adjustment structure on the left armrest and the right armrest. The switch can be rotated around the hinge by simply turning the horizontal button on the armrest seat, thereby generating a traction action on the gate wire. Through the transmission action of the gate wire, the trigger component of the corresponding adjustment structure is pulled to start the corresponding walking adjustment structure or the lifting adjustment structure. There is no need to bend over for adjustment. Only the switch on the corresponding armrest can be turned by hand. The operation is very simple, which improves the user's experience comfort.

[0020] 2. By opening a wire groove for the gate wire to pass through on the armrest seat and the connecting arm, the gate wire is hidden in the armrest, which not only prevents the user from contacting the gate wire and improves the safety of use, but also improves the aesthetics of the product.

[0021] 3. By setting a lifting device between the armrest seat and the connecting arm, the locking groove can be disengaged from the locking protrusion by pressing the horizontal button, and the armrest seat can be freely raised and lowered on the connecting arm, and can be engaged with the locking protrusion at another position under the reset spring or manual operation, thereby realizing free adjustment of the armrest height.

[0022] 4. By setting a sliding device between the armrest seat and the hinge seat, using the hollow groove to provide space for sliding forward and backward, and the positioning keys on both sides of the slider cooperate with the positioning grooves on the inner wall of the bottom cover to provide position locking, the front and rear position of the armrest can be freely adjusted; by setting a steering structure between the first connecting position and the first fixed block, using the directional key slots on both sides of the first connecting position, and the directional keys cooperate with the directional slots on both sides of the first fixed block to provide angle locking, the angle of the armrest can be freely adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Shown is a schematic diagram of the seat structure provided by the present invention.

[0024] Figure 2 Shown is a schematic diagram of the structure of the handrail.

[0025] Figure 3 Shown is a schematic diagram of the internal structure of the handrail with the sleeve hidden.

[0026] Figure 4 Shown is a schematic structural diagram of the connecting arm.

[0027] Figure 5 Shown Figure 3 The structural schematic diagram of the connecting arm is hidden.

[0028] Figure 6 Shown is a schematic diagram of the switch structure.

[0029] Figure 7 Shown Figure 5 Exploded diagram.

[0030] Figure 8 Shown is a schematic diagram of the internal structure of the armrest seat.

[0031] Fig. 9 Shown Figure 8 Exploded diagram.

[0032] Fig.10 Shown is a schematic diagram of the structure of the junction box.

[0033] Fig.11 Shown is a schematic structural diagram of the push-to-reset mechanism.

[0034] Fig.12 Shown is a schematic structural diagram of the stroke adjustment mechanism.

[0035] Description of the accompanying drawings: 1. chassis structure, 2. armrest part, 3. armrest seat, 3-1. armrest seat cover, 3-2. armrest seat bottom cover, 4. sleeve, 4-1. first through hole, 5. connecting arm, 5-1. wire groove, 5-2. cavity, 5-3. positioning protrusion, 6. switch, 6-1. longitudinal hinge column, 6-2. transverse pressing plate, 6-3. mounting hole, 7. lifting device, 7-1. hinge seat, 7-2. transverse pressing head, 7-3. longitudinal support rod, 7-4. positioning groove, 8. sliding device, 8-1. slider, 8-2. arc positioning groove, 8-3. movable key position, 8-4. positioning key, 8-4-1. Connecting column, 8-4-2, arc-shaped protrusion, 8-5, reset spring, 9, hollow groove, 10, first column, 11, first connecting position, 11-1, directional key slot, 11-2, directional key, 12, first fixing block, 12-1, directional slot, 13: junction box, 13-1: press reset mechanism, 13-1-1: button, 13-1-2: slide slot, 13-1-3: rotating wheel, 13-1-4: guide rod, 13-1-5: reset spring, 13-2: stroke adjustment mechanism, 13-2-1: box body, 13-2-2: spring, 13-2-3: pull wire, 13-2-4: card plate. DETAILED DESCRIPTION

[0036] The present technical solution is described in detail below in conjunction with specific embodiments.

[0037] like Figure 1-Figure 2 As shown, a seat with a linkage adjustment function includes a seat body, a left armrest and a right armrest installed on the seat body, the left armrest and the right armrest are fixedly connected to the side of the chassis structure 1 of the seat body, the chassis structure 1 is provided with a leisure adjustment structure for adjusting the inclination angle of the seat back and a lifting adjustment structure for adjusting the height of the chassis, switches 6 are respectively arranged on the left armrest and the right armrest, one of the switches 6 is controlled and connected to the leisure adjustment structure through a gate line, and the other switch 6 is controlled and connected to the lifting adjustment structure through a gate line.

[0038] Combination Figure 6 As shown, the switch 6 includes a longitudinal hinge column 6-1 and a transverse pressing plate 6-2 connected together, wherein one end of the longitudinal hinge column 6-1 is hinged to the armrest seat 3, and the other end is provided with a mounting hole 6-3 connected to one end of the gate line; the other end of the gate line is connected to the starting switch of the leisure adjustment structure or the lifting adjustment structure. When the transverse pressing plate 6-2 is turned, a starting force can be given to the leisure adjustment structure or the lifting adjustment structure to start the leisure adjustment structure or the lifting adjustment structure to achieve the adjustment of the chair back pitch or the seat height. In other embodiments, the gate line is a signal line, and the switch is a traditional electronic control button; it is not limited to this embodiment.

[0039] In this embodiment, the left armrest and the right armrest preferably both include an armrest seat 3 and a connecting arm 5 assembled together, a plastic or leather armrest portion 2 is installed on the upper side of the armrest seat 3, and the lower end of the connecting arm 5 is fixedly connected to the side of the chassis structure of the seat body. The armrest seat 3 includes an armrest seat cover 3-1 and an armrest seat bottom cover 3-2 assembled together, the longitudinal hinge column 6-1 is hinged in the armrest seat bottom cover 3-2, and the transverse pressing plate 6-2 extends through the outer wall of the armrest seat bottom cover 3-2. The switch can be rotated around the armrest seat by turning the transverse pressing plate, forming a traction action on the gate line, thereby generating a starting action on the free adjustment structure or the lifting adjustment structure connected to the end of the gate line, and the chair back tilt angle or the chassis height can be freely adjusted without bending over. The direction of the transverse pressing plate can be set at the front end, rear end, both sides, bottom and top of the armrest seat, and can be adjusted according to actual conditions, but all belong to the protection scope of this application.

[0040] In this embodiment, the connecting arm 5 is a hollow arm, and the brake wire is led to the bottom of the chassis structure through the inner cavity of the hollow arm. Preferably, a wire groove 5-1 for the brake wire to pass through is opened in the connecting arm 5, and the wire groove 5-1 is geometrically shaped along the main body of the connecting arm 5.

[0041] Combination Figure 3-Figure 5 As shown, a sleeve 4 is installed at the bottom of the armrest seat 3, and the sleeve 4 and the connecting arm 5 form a liftable sleeve structure; a lifting device 7 for adjusting the height of the armrest seat 3 is connected between the armrest seat 3 and the connecting arm 5.

[0042] In this embodiment, the lifting device 7 includes: an articulated seat 7-1 fixedly connected to the armrest seat, and a lifting member hinged to the articulated seat 7-1, wherein the lifting member includes a transverse pressing head 7-2 and a longitudinal support rod 7-3. The installation structure of the lifting device 7 is as follows: a cavity 5-2 for accommodating the longitudinal support rod 7-3 is provided in the connecting arm 5, and a plurality of groups of positioning protrusions 5-3 are arranged in the vertical direction inside the cavity 5-2; the transverse pressing head 7-2 is hinged to one end of the longitudinal support rod 7-3, and a positioning groove 7-4 cooperating with the positioning protrusion 5-3 is arranged at the other end of the longitudinal support rod 7-3. Preferably, the sleeve 4 is provided with a first through hole 4-1 for the transverse pressing head 7-2 to pass through.

[0043] Combination Figure 7-Figure 9As shown, a sliding device 8 for adjusting the front and rear position of the armrest seat is provided between the armrest seat 3 and the hinge seat 7-1. The sliding device 8 comprises: a slider 8-1 provided inside the armrest seat bottom cover 3-2, a hollow groove 9 provided at the bottom of the armrest seat bottom cover 3-2, and a first column 10 provided at the top of the hinge seat 7-1; the first column 10 passes through the hollow groove 9 and is fixed to the slider 8-1; thus, the armrest seat 3 and the hinge seat 7-1 can slide within the range limited by the hollow groove 9.

[0044] In this embodiment, it is preferred that a plurality of groups of arc-shaped positioning grooves 8-2 are provided on both sides of the inner wall of the armrest base bottom cover 3-2, and it is preferred that movable key positions 8-3 are provided on both sides of the slider 8-1, and positioning keys 8-4 are slidably connected in each movable key position 8-3, and each positioning key 8-4 cooperates with the arc-shaped positioning groove 8-2 under the action of a return spring 8-5. The advantage of such a setting is that the slider 8-1 can only slide after a specific force is applied to the slider 8-1, which facilitates the positioning of the slider 8-1.

[0045] In this embodiment, the positioning keys 8-4 are symmetrically arranged, and the two symmetrical positioning keys 8-4 share a return spring 8-5. Specifically, a connecting column 8-4-1 is arranged inside the positioning key 8-4, and an arc-shaped protrusion 8-4-2 that cooperates with the arc-shaped positioning groove 8-2 is arranged outside, and the connecting column 8-4-1 is plugged into the two ends of the return spring 8-5.

[0046] In this embodiment, a first connecting position 11 is provided on the slider 8 - 1 , and a first fixing block 12 cooperating with the first column 10 is provided in the first connecting position 11 , so as to facilitate the connection between the first column and the slider 8 - 1 .

[0047] Recombination Figure 8 , Fig. 9 As shown, a steering structure for adjusting the angle of the armrest seat is provided between the first connecting position 11 and the first fixing block 12; the steering structure comprises: directional key slots 11-1 provided on both sides of the first connecting position 11, directional keys 11-2 cooperating with the directional key slots 11-1, and a plurality of groups of directional slots 12-1 provided on the side of the first fixing block 12 cooperating with the directional keys 11-2; so as to realize position locking during rotation.

[0048] Furthermore, combined with Fig.10As shown, in order to facilitate the connection between the brake wire and the leisure adjustment structure or the lifting adjustment structure, a junction box 13 is preferably fixed on the seat body, and a push-reset mechanism 13-1 and a stroke adjustment mechanism 13-2 connected together are provided in the junction box 13. The push-reset mechanism 13-1 is connected to the leisure adjustment structure or the lifting adjustment structure and has two different working positions, thereby providing a start-stop signal for the leisure adjustment structure or the lifting adjustment structure. The stroke adjustment mechanism 13-2 is connected to the brake wire and can release connecting wires of different lengths according to the length of the brake wire.

[0049] Combination Fig.11 As shown, in this embodiment, the push-reset mechanism 13-1 is similar to the existing ballpoint pen push structure, and is composed of a shell and a button 13-1-1, a slide groove 13-1-2, a rotating wheel 13-1-3, a guide rod 13-1-4 and a reset spring 13-1-5 installed in the shell. The slide groove 13-1-2 is fixed to the shell, and the rotating wheel 13-1-3 is movably installed in the shell and cooperates with the slide groove 13-1-2. The button 13-1-1 passes through the slide groove 13-1-2 and contacts the rotating wheel 13-1-3. The guide rod 13-1-4 is fixed to the rotating wheel 13-1-3. The reset spring 13-1-5 is sleeved on the guide rod 13-1-4 to provide a reset force for the rotating wheel 13-1-3, thereby prompting the rotating wheel 13-1-3 to rotate along the matching inclined surface.

[0050] Combination Fig.12 As shown, the stroke adjustment mechanism 13-2 is preferably an automatic winding and releasing box, comprising: a box body 13-2-1, a spring 13-2-2 installed in the box body 13-2-1, a pull wire 13-2-3 connected to the spring 13-2-2, and a clamping plate 13-2-4 arranged on the box body 13-2-1 for fixing the pulled-out length of the pull wire 13-2-3.

[0051] When actually connected, the button 13-1-1 is connected to the start switch of the Xiaoyao adjustment structure or the lifting adjustment structure, the box body 13-2-1 is connected to the button 13-1-1, and then a pull wire 13-2-3 of a specific length is pulled out according to the length of the gate wire, and the pull wire 13-2-3 is connected to the gate wire. Here, the advantage of setting the junction box 13 is that it can match any length of gate wire, and the connection and installation are convenient.

[0052] In actual application, when it is necessary to adjust the height of the seat or the swing angle of the chair back, it is necessary to activate the swing adjustment structure and the lifting adjustment structure on the chassis structure. It is worth noting that the present application is applicable to the chair chassis structure commonly used in the prior art with a swing adjustment structure and a lifting function structure, and has universal applicability, including but not limited to, for example, a swivel chair chassis structure with application number CN201920359514.4, including a bottom plate, a bottom shell, a top cover, a tail plate, a swing force adjustment structure, and a lifting adjustment structure. For those skilled in the art, several variations and improvements can be made without departing from the creative concept of the present invention, and these all fall within the scope of protection of the present invention.

[0053] In this embodiment, switches for controlling the walking adjustment structure and the lifting adjustment structure are respectively provided on the armrest seats on the left and right sides. By simply turning the horizontal button on the armrest seat, the switch can be rotated around the hinge, generating a traction action on the gate line, thereby generating a starting action on the walking adjustment structure or the lifting adjustment structure connected to the end of the gate line. There is no need to bend over to adjust. The tilt angle of the chair back or the height of the chassis can be freely adjusted by turning the switch on the corresponding armrest by hand. The operation is very simple. In this embodiment, the walking adjustment structure adjusts the pitch angle of the chair back by starting the forward and reverse motion of the motor. The forward and reverse switching of the motor can be achieved through a conventional control program; the lifting adjustment structure adjusts the height of the seat by starting the cylinder switch. After the cylinder is started, the seat is automatically raised, and the seat can be limited to the required height by the seat pressure. In this embodiment, a reset component is preferably provided in the armrest seat. After the user has finished adjusting, the horizontal press plate is released, and the horizontal press plate is automatically reset under the action of the reset spring. By providing a wire groove for the gate wire to pass through on the armrest seat and the connecting arm, the gate wire is hidden in the armrest, which not only prevents the user from contacting the gate wire and improves the safety of use, but also improves the aesthetics of the product.

[0054] When the armrest needs to be height-adjusted, the horizontal button is pressed to disengage the locking groove from the locking protrusion, and the armrest can be freely raised and lowered on the connecting arm. After reaching the target height, the horizontal button is released, and the locking groove and the locking protrusion are engaged under the reset assembly or manual operation. In this embodiment, a reset spring is preferably provided at the horizontal button. Of course, alternative components such as reset springs that are obvious to those skilled in the art all fall within the scope of protection of the present invention and will not be described in detail here.

[0055] When the front and rear position of the armrest needs to be adjusted, the position can be adjusted by simply pushing the armrest seat. The hollow groove at the bottom of the armrest seat limits the moving range to prevent the armrest seat from falling off. During the pushing process, the positioning key is squeezed, slides inward on the movable key position and compresses the reset spring, and finally detaches from the original arc-shaped positioning groove. After reaching the next arc-shaped positioning groove, under the action of the reset spring, the positioning key is reset on the movable key position and clamped in the next arc-shaped positioning groove, thereby realizing the front and rear position adjustment.

[0056] When the armrest angle needs to be adjusted, since the first column is provided with a cross-shaped protrusion, and the first fixed block matched therewith is also provided with a cross-shaped recess, the first column and the first fixed block do not rotate relative to each other after connection, and the angle can be adjusted by simply rotating the armrest seat. The directional key slots and directional keys provided on both sides of the first connection position provide an angle locking function; during the rotation process, the directional keys are squeezed and disengaged from the original directional slots provided on both sides of the first fixed block. After reaching the next directional slot, the directional keys are snapped into the next directional slot to achieve angle adjustment. In this embodiment, the directional keys and the directional slots are preferably made of elastic material.

[0057] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A seat with linkage adjustment function, comprising a seat body, a left armrest and a right armrest mounted on the seat body, wherein the seat body is provided with a remote adjustment structure for adjusting the inclination angle of the seat back and a lifting adjustment structure for adjusting the height of the seat; characterized in that: A switch is provided on the left armrest and the right armrest respectively, one of the switches is connected to the control of the leisure adjustment structure through a gate line, and the other switch is connected to the control of the lifting adjustment structure through a gate line; The left armrest and the right armrest each include an armrest seat and a connecting arm assembled together, and the connecting arm is fixedly connected to the side of the chassis structure of the seat body; The switch comprises a longitudinal hinged column and a transverse pressing plate connected together, wherein the longitudinal hinged column is hinged to the armrest seat; one end of the brake wire is fixed to the longitudinal hinged column or the transverse pressing plate, and the other end of the brake wire is connected to the starting switch of the leisure adjustment structure or the lifting adjustment structure; The armrest seat comprises an armrest seat surface cover and an armrest seat bottom cover which are assembled together, the longitudinal hinged column is arranged in the armrest seat bottom cover, and the transverse pressing plate extends through the outer wall of the armrest seat bottom cover; the connecting arm is a hollow arm, and the brake wire is led to the bottom of the chassis structure through the inner cavity of the hollow arm; a wire groove for the brake wire to pass through is opened in the connecting arm; A junction box is also fixed on the seat body, and a push-reset mechanism and a stroke adjustment mechanism connected together are provided in the junction box. The push-reset mechanism is connected to the starting switch of the leisure adjustment structure or the lifting adjustment structure and has two different working positions. The stroke adjustment mechanism is connected to the gate wire and can release connecting wires of different lengths according to the length of the gate wire.

2. A seat with linkage adjustment function according to claim 1, characterized in that: A sleeve is installed at the bottom of the armrest seat, and the sleeve and the connecting arm form a liftable sleeve structure; a lifting device for adjusting the height of the armrest seat is provided between the armrest seat and the connecting arm.

3. A seat with linkage adjustment function according to claim 2, characterized in that: The lifting device comprises: an articulated seat fixedly connected to the armrest seat, and a lifting member articulated to the articulated seat, wherein the lifting member comprises a horizontal pressing head and a longitudinal supporting rod connected together; The installation structure of the lifting device is as follows: a cavity for accommodating the longitudinal support rod is opened in the connecting arm, and a plurality of groups of locking protrusions are arranged inside the cavity along the vertical direction; the transverse pressing head is hinged to one end of the longitudinal support rod, and the other end of the longitudinal support rod is provided with a locking groove that cooperates with the locking protrusion.

4. A seat with linkage adjustment function according to claim 3, characterized in that: The sleeve is provided with a first through hole for the transverse pressing head to pass through.

5. The seat with linkage adjustment function according to claim 3, characterized in that: A sliding device for adjusting the front and rear position of the armrest seat is arranged between the armrest seat and the hinge seat; the sliding device includes: a sliding groove arranged inside the armrest seat, a sliding block arranged in the sliding groove, a hollow groove arranged at the bottom of the sliding groove, and a first column arranged at the top of the hinge seat; the first column is fixed to the sliding block after passing through the hollow groove.

6. The seat with linkage adjustment function according to claim 5, characterized in that: A plurality of groups of arc-shaped positioning grooves are provided on both sides of the slide groove, and a movable key position, a positioning key slidably connected to the movable key position, and a return spring connected to the positioning key are provided on the slide block. The positioning key is pressed and assembled with the arc-shaped positioning groove under the action of the return spring.

7. The seat with linkage adjustment function according to claim 5, characterized in that: A first connecting position is provided on the sliding block, and a first fixing block cooperating with the first column is provided in the first connecting position; a steering structure for adjusting the angle of the armrest seat is provided between the first connecting position and the first fixing block; the steering structure comprises: directional key slots provided on both sides of the first connecting position, directional keys cooperating with the directional key slots, and a plurality of groups of directional slots provided on the side of the first fixing block and cooperating with the directional keys.

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