CN214341243U

CN214341243U - Handrail lifting adjusting device and seat

Info

Publication number: CN214341243U
Application number: CN202022919647.8U
Authority: CN
Inventors: 王大秋; 周骏
Original assignee: Zhejiang Motostuhl Furniture Technology Co ltd
Current assignee: Hangzhou Netease Yanxuan Trading Co ltd; Zhejiang Motostuhl Furniture Technology Co ltd
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2021-10-08
Anticipated expiration: 2030-12-08

Abstract

The utility model discloses a handrail lifting adjusting device and a chair, which comprises a handrail component and a supporting frame; the armrest component comprises an armrest and a connecting seat, and the armrest is arranged on the connecting seat; the support frame is provided with a support rod which is longitudinally arranged, and the connecting seat is connected to the support rod in a sliding manner; a locking mechanism is arranged between the connecting seat and the supporting rod, and the locking mechanism comprises an elastic clamping piece; the elastic clamping piece is provided with a clamping head clamped between the connecting seat and the supporting rod, and a clamping tooth and a clamping groove which are in clamping fit are arranged between the clamping head and the supporting rod; the locking mechanism also comprises a cam wrench acting on the chuck, and the cam wrench rotates to drive the chuck to move; when the handrail is in a normal use state, the cam on the cam wrench extrudes the chuck to enable the chuck to be attached to the supporting rod, and the clamping teeth are clamped with the clamping grooves; when the handrail is adjusted in a lifting way, the cam wrench is rotated to enable the elastic clamping piece to elastically reset, the clamping head is separated from the supporting rod, and the clamping teeth are separated from the clamping grooves; the cam spanner rotates to control locking and unlocking of the lifting of the connecting seat, and the structure is simple and ingenious.

Description

Handrail lifting adjusting device and seat

Technical Field

The utility model relates to a thing to sit on field, in particular to handrail lifting adjusting device and seat.

Background

The chair is a seat with a backrest and armrests, the height of the armrests on the traditional chair is mostly fixed, so that when the height of a user is too high, the user can place the arms on the armrests completely only by bending the body of the user; and when the height of the user is too low, when the user sits on the seat, the arms are placed on the armrests, so that the arms can be in a lifting state, the arms are numb when the arms are kept in the state for a long time, the universality of the seat is not strong, and the limitation is high, therefore, some seat manufacturers provide the research and development conception of the lifting adjusting device of the seat armrests, the armrests of the seat can be adjusted according to the actual requirements of the user, and the universality and the comfort degree of the seat are greatly improved.

At present, although a plurality of seat armrest lifting mechanisms are available in the market, the number of parts in each type of seat armrest lifting mechanism is large, and the position relationship and the connection relationship among the parts are complex. If the handrail lifting structure comprises a hollow tubular supporting seat and a handrail main body which is arranged in the supporting seat and is in sliding fit with the supporting seat, an adjusting mechanism is arranged between the handrail main body and the supporting seat; the height of the armrest main body is adjusted through the adjusting mechanism; the supporting seat is connected to the seat; thus, although the height of the handrail can be adjusted, the structure of the handrail is too complicated and the handrail is composed of a plurality of components; the inner structure is complicated, and the handrail body can be lifted and lowered only by the adjusting mechanism and needs to be locked, so that the whole handrail is inconvenient to assemble, install and disassemble; resulting in higher tooling and installation costs for the handrail. Therefore, it is desirable to design a handrail lifting mechanism that can lift a handrail and has a relatively simple structure, low cost and convenient operation.

Disclosure of Invention

The utility model overcomes the defects in the prior art, and aims to provide a lifting adjusting device of a chair armrest; the lifting structure is connected on the supporting rod in a sliding way through the connecting seat so as to realize the lifting adjustment of the handrail; the cam wrench rotates to act on the elastic clamping piece so as to realize locking and unlocking between the connecting seat and the supporting rod; the structure is simple and ingenious, and the cost can be saved; and the operation is very convenient, and only the cam spanner needs to be rotated.

And then, the armrest on the seat is arranged on the seat by adopting the lifting adjusting device, so that the lifting adjustment of the seat is very convenient.

The technical scheme of the utility model is realized like this:

an armrest lifting adjusting device comprises an armrest component and a supporting frame for supporting the armrest component; the armrest component comprises an armrest and a connecting seat, and the armrest is arranged on the connecting seat; the support frame is provided with a support rod which is longitudinally arranged, and the connecting seat is connected to the support rod in a sliding manner; a locking mechanism is arranged between the connecting seat and the supporting rod, and the locking mechanism comprises an elastic clamping piece connected to the connecting seat; the elastic clamping piece is provided with a clamping head clamped between the connecting seat and the supporting rod, and a clamping tooth and a clamping groove which are in clamping fit are arranged between the clamping head and the supporting rod; the locking mechanism also comprises a cam wrench acting on the chuck, the cam wrench is connected to the connecting seat and rotates to drive the chuck to move; when the handrail is in a normal use state, the cam on the cam wrench extrudes the chuck to enable the chuck to be attached to the supporting rod, and the clamping teeth are clamped with the clamping grooves; when the handrail is lifted and adjusted, the cam wrench is rotated to enable the elastic clamping piece to elastically reset, the clamping head is separated from the supporting rod, and the clamping teeth are separated from the clamping grooves.

Preferably, the cam wrench is rotatably connected to one side of the connecting seat away from the supporting rod; when the handrail is in a normal use state, the cam wrench covers the connecting seat downwards; when the armrest is lifted and adjusted, the cam spanner is turned outwards and opened.

Preferably, the elastic clamping piece is in a strip shape and is bent; the clamping head is positioned at the upper end of the elastic clamping piece, and the lower end of the elastic clamping piece is fixedly connected to one side, away from the supporting rod, of the connecting seat.

Preferably, the connecting seat is provided with a rotating installation groove which penetrates through the connecting seat from left to right, and the elastic clamping piece penetrates through the rotating installation groove so that the clamping head is located between the connecting seat and the supporting rod.

Preferably, a cam on the cam wrench is rotatably connected in the rotation mounting groove, and the cam rotates to abut against and act on the chuck.

Preferably, an elastic reset device is further arranged between the connecting seat and the elastic clamping piece, the elastic reset device comprises a spring, one end of the spring abuts against the connecting seat, and the other end of the spring abuts against the elastic clamping piece; when the clamping head is extruded by the cam to be jointed with the supporting rod, the spring generates elastic deformation to provide the elastic force for resetting the elastic clamping piece.

Preferably, the latch is longitudinally arranged on the chuck; the clamping grooves are arranged on the supporting rod in a wavy longitudinal interval.

Preferably, two sides of the clamping head are also provided with guide blocks protruding towards the direction of the supporting rod, and the supporting rod is correspondingly provided with two sliding grooves along the length direction of the supporting rod; the length of the guide block is longer than that of the latch.

Preferably, the support rod is provided with a sliding seat which protrudes outwards, and the sliding seat is in sliding fit with the connecting seat; a sliding guide mechanism is arranged between the sliding seat and the connecting seat; the sliding guide mechanism comprises a slide rail and a slide rail, the slide rail is arranged on one of the sliding seat or the connecting seat, and the slide rail is correspondingly arranged on the other of the sliding seat or the connecting seat.

Preferably, along the width direction of the sliding seat, two sides of the sliding seat are respectively inwards sunken to form the slide ways, and the slide ways are arranged along the length direction of the supporting rod; correspondingly, two sides of the connecting seat close to the sliding seat end respectively extend towards the middle direction of the connecting seat to form sliding rails, and the sliding rails are arranged along the length direction of the connecting seat; the slide and the slide rail are matched to ensure that the connecting seat is limited to slide along the length direction of the supporting rod.

A chair comprises a chair seat and an armrest lifting adjusting device, wherein a supporting frame is fixedly connected with the chair seat.

Adopted above-mentioned technical scheme the utility model discloses a design departure point, theory and beneficial effect are:

firstly, the connecting seat is connected with the supporting rod in a sliding manner, and then the connecting seat is controlled to lift along the supporting rod, so that the lifting of the handrail can be realized; the locking mechanism between the connecting seat and the supporting rod is skillfully designed, and comprises an elastic clamping piece which can be clamped and matched with the supporting rod and a cam wrench which controls the elastic clamping piece to move; then, the driving spanner is rotated to drive the cam to rotate and extrude the clamping head on the elastic clamping piece to be attached to the supporting rod, and the connecting seat and the supporting rod are locked; the operation is very convenient, the structure is simple, and the cost can be saved.

Furthermore, the elastic clamping piece has elasticity, and a spring is arranged between the elastic clamping piece and the connecting seat; then when the cam wrench is rotated to ensure that the cam does not extrude the chuck any more, the spring provides elasticity, so that the elastic clamping piece elastically resets to ensure that the chuck is automatically separated from the supporting rod; at the moment, the connecting seat can slide relative to the supporting rod; the elastic clamping piece can automatically reset, and the design is ingenious; the operation is very convenient and fast; and when the cam wrench is rotated, the damping feeling is good.

Secondly, a sliding seat is arranged on the supporting rod, a sliding way is arranged on the sliding seat, and a sliding rail is correspondingly arranged on the connecting seat; the slide way is in sliding fit with the slide rail, so that the connecting seat can stably and smoothly slide relative to the supporting rod, and the shaking is eliminated; and the armrest is in the normal use state

And the cam spanner covers the connecting seat, so that the whole structure is simple and attractive.

Drawings

Fig. 1 is a schematic perspective view of the connection between the connection seat and the support frame in the embodiment of the present invention;

FIG. 2 is an exploded view of the connection between the connecting base and the supporting rod according to the embodiment of the present invention;

fig. 3 is an exploded view of the connecting seat and the supporting rod at another angle according to the embodiment of the present invention;

fig. 4 is a schematic perspective view illustrating a connection between the support bar and the slide seat according to an embodiment of the present invention;

FIG. 5 is a schematic perspective view of the sliding connection between the connecting seat and the supporting rod according to the embodiment of the present invention;

fig. 6 is a schematic perspective view of a connection seat according to an embodiment of the present invention;

fig. 7 is a schematic perspective view of the elastic clip member connected to the connecting seat according to the embodiment of the present invention;

fig. 8 is a schematic perspective view of an elastic clip member according to an embodiment of the present invention;

FIG. 9 is a schematic perspective view of a seat according to an embodiment of the present invention

The figures are numbered: an armrest assembly 1; a support frame 2; a back frame 3; a handrail 4; a connecting seat 5; a support rod 6; a connecting shaft a; a slide carriage 7; a slideway 8; a slide rail 9; an elastic fastener 10; a chuck 10 a; a connecting portion 10 b; a connecting rod 10 c; a fixed part 11; the mounting groove 12 is rotated; a latch 13; a card slot 14; a guide block 15; a chute 16; a cam wrench 17; the cam 17 a; a handle 17 b; a spring 18; a spring mounting hole 19; and a fitting portion 20.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In the description of the present invention, the term "at least one" means one or more unless explicitly defined otherwise. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The present embodiment is described with reference to the reference orientation of each part, such as front and rear, in a state where the user normally uses the seat after sitting on the seat.

The specific implementation manner of the utility model is as follows:

as shown in fig. 1-8, the present invention firstly provides an armrest lifting adjustment device, which comprises an armrest assembly 1 and a support frame 2 for supporting the armrest assembly 1, wherein the support frame 2 is connected to a seat 3 of a chair; the armrest component 1 comprises an armrest 4 and a connecting seat 5, wherein a connecting shaft a for installing the armrest 4 is arranged at the upper end of the outer side of the connecting seat 5, and the armrest 4 is rotatably connected to the connecting shaft a; the support frame 2 is provided with a support rod 6 which is longitudinally arranged, and the connecting seat 5 is connected to the outer side of the support rod 6 in a sliding way; so that the connecting seat 5 can slide up and down along the supporting rod 6 to adjust the height of the armrest 4; a locking mechanism is arranged between the connecting seat 5 and the support rod 6, and can effectively lock and unlock the connecting seat 5 in a sliding manner; and then the armrest 4 can be locked and unlocked by lifting.

As shown in fig. 1, 4 and 5, a sliding seat 7 in sliding fit with the connecting seat 5 is connected to an outer end surface of the support rod 6, the sliding seat 7 is fixed on the support rod 6 through a screw connection, and the sliding seat 7 is arranged along the length direction of the support rod 6; the sliding fit mode of the sliding seat 7 and the connecting seat 5 is as follows: a sliding guide mechanism is arranged between the sliding seat 7 and the connecting seat 5, and comprises sliding rails 8 arranged on two sides of the sliding seat and sliding rails 9 correspondingly arranged on two sides of the connecting seat 5; specifically, the method comprises the following steps: the sliding seat 7 protrudes outwards from the support rod 6, and the width of the sliding seat 7 is smaller than that of the support rod 6; along the width direction of the sliding seat 7, two sides of the sliding seat 7 are respectively inwards sunken to form the slide ways 8, and the slide ways 8 are arranged along the length direction of the sliding seat 7; correspondingly, one side of the connecting seat 5 facing the support rod 6 is of a hollow structure, two sides of the connecting seat 5 close to the end of the sliding seat 7 respectively extend towards the middle direction of the connecting seat 5 to form the sliding rail 9, and the sliding rail 9 is arranged along the length direction of the connecting seat 5; when the connection is performed, the slide rail 9 on the connection seat 5 slides into the slide rail 8 on the slide seat 7 to realize the sliding fit between the connection seat 5 and the slide seat 7, and the connection seat 5 is limited to slide only along the length direction of the slide seat 7, and the connection seat 5 and the slide seat 7 are relatively fixed in the left-right direction.

As shown in fig. 2, 3, 6-8, the locking mechanism comprises an elastic clip 10 connected to the connecting base 5, the elastic clip 10 is strip-shaped, the elastic clip 10 has elasticity, and comprises a clip head 10a at the upper end, a connecting part 10b at the lower end and a connecting rod 10c connecting the clip head 10a and the connecting part 10 b; the connecting rod 10c has elasticity, and the middle part of the elastic clamping piece 10 is bent, so that the clamping head 10a and the connecting part 10b are staggered left and right; the lower end of one side of the connecting seat 5 far away from the support rod 6 is correspondingly provided with a fixing part 11; a rotary mounting groove 12 which penetrates through the connecting seat from left to right is also arranged in the middle of the connecting seat 5; then when the elastic clamping piece 10 is connected, the clamping head 10a at the upper end of the elastic clamping piece firstly passes through the rotating installation groove 12, and then the connecting part 10b at the lower end of the elastic clamping piece is fixedly connected to the fixing part 11 on the connecting seat 5 through a screw, so that the lower end of the elastic clamping piece 10 is fixed with the connecting seat 5, and the elastic clamping piece 10 can be bent and deformed within a certain range to enable the clamping head 10a to move in the left and right directions relative to the connecting seat 5. Moreover, an elastic resetting device is also arranged between the elastic clamping piece 10 and the connecting seat 5, and the elastic resetting device comprises a spring 18; a spring mounting hole 19 is arranged on the connecting seat 5, the height of the spring mounting hole 19 is positioned between the fixing part 11 and the rotating mounting groove 12, and a matching part 20 which is matched with the spring 18 in a mounting way is correspondingly arranged on the connecting rod 10c of the elastic clamping piece 10; one end of the spring 18 is arranged in the spring mounting hole 19, and the other end of the spring 18 is connected and matched with the matching part 20; then, when the chuck 10a is moved toward the supporting rod 6 by an external force, the spring 18 will be elastically compressed to provide an elastic force for restoring the elastic chuck 10, so that the chuck 10a has a tendency to move away from the supporting rod 6.

When the device is installed, the elastic clamping piece 10 is connected with the connecting seat 5, and then the connecting seat 5 is in sliding fit with the supporting rod 6; the clamping head 10a is clamped between the sliding seat 7 and the connecting seat 5; a clamping tooth 13 and a clamping groove 14 which are matched with each other in a clamping way are respectively arranged between the clamping head 10a and the sliding seat 7, specifically: two longitudinally spaced latch teeth 13 are arranged on the end surface of the chuck 10a facing the support rod 6, and the latch teeth 13 protrude out of the end surface of the chuck 10 a; a plurality of clamping grooves 14 are correspondingly arranged on one side of the sliding seat 7 facing the connecting seat 5, and the clamping grooves 14 are arranged on the sliding seat 7 at intervals in a wavy longitudinal direction; the latch 13 can be matched with the clamping groove 14 in a clamping manner; then, when the clamping head 10a and the sliding seat 7 are abutted, the clamping teeth 13 are clamped with the clamping grooves 14, and the connecting seat 5 is relatively fixed with the supporting rod 6; when the clamping head 10a is separated from the supporting rod 6, the clamping teeth 13 are separated from the clamping grooves 14, and the connecting seat 5 can slide up and down relative to the supporting rod 6 to adjust the height of the handrail 4; namely, the sliding locking and unlocking of the connecting seat 5 can be realized by controlling the movement of the chuck 10 a. In addition, it should be noted that, after the installation is completed, when the elastic clamping piece 10 is not subjected to an external force, the clamping head 10a is not attached to the sliding seat 7 in a free state, and a certain gap exists between the clamping head and the sliding seat, that is, the clamping teeth 13 are not clamped with the clamping grooves 14; in this state, the connecting base 5 can slide relative to the supporting rod 6.

As shown in fig. 2 and 3, the left and right ends of the chuck 10a are provided with guide blocks 15 protruding toward the support rod 6, the latch 13 is located between the two guide blocks 15, and the length of the guide block 15 is longer than that of the latch 13; two sliding grooves 16 are correspondingly arranged on the sliding seat 7 along the length direction thereof, and the clamping groove 14 is also positioned between the two sliding grooves 16; when the connection between the support rod 6 and the connecting seat 5 is completed, the guide block 15 is always in sliding fit in the sliding groove 16; so that the clamping head 10a can not deviate forwards and backwards, and when the connecting seat 5 slides, the clamping head 10a also slides along the length direction of the supporting rod 6; the sliding is more stable, and the internal structure is stable. Moreover, the sliding groove 16 has a certain length, so that the guide block 15 is limited to move only in the sliding groove 16, the sliding between the connecting seat 5 and the sliding seat 7 can be limited, and the connecting seat 5 is prevented from sliding out of the supporting rod 6; simple and reliable structure and ingenious design.

As shown in fig. 1-3 and 6, the locking mechanism further includes a cam wrench 17 capable of acting on the chuck 10a, the cam wrench 17 is rotatably connected to the connecting base 5, and the cam wrench 17 is rotated to drive the chuck 10a to move left and right to control the latch 13 to be engaged with the slot 14; specifically, the method comprises the following steps: the cam wrench 17 is provided with a cam 17a and a handle 17b which drives the cam 17a to rotate; the cam 17a is rotatably connected in the rotating installation groove 12 on the connecting seat 5, and the handle 17b is exposed out of the connecting seat 5; the rotating installation groove 12 penetrates through the connecting seat 5, namely, the inclined surface of the cam 17a is abutted against the chuck 10a, so that the chuck 10a can be directly pushed to move towards the supporting rod 6 by the rotation of the control cam 17 a; the clamping head 10a is attached to the sliding seat 7, so that the clamping teeth 13 are in clamping fit with the clamping grooves 14; then the sliding locking between the support rods 6 of the connecting seat 5 is realized; in a locking state, the handle 17b covers the connecting seat 5, so that the structure is saved and attractive; when the sliding unlocking is needed, the handle 17b is only needed to be turned outwards, the clamping head 10a is far away from the sliding seat 7 under the action of the spring 18, and the clamping teeth 13 are separated from the clamping grooves 14; the connecting seat 5 can slide up and down relative to the supporting rod 6 to adjust the height of the handrail; after the adjustment is completed, the handle 17b is rotated downwards, the cam 17a will press the chuck 10a again to lock the chuck with the support rod 6, and the connecting seat 5 is fixed with the support rod 6 again.

The utility model provides a seat then, as shown in fig. 9, including seat support 3 with handrail elevating system, support frame 2 connect and fix on seat support 3.

In conclusion, the lifting adjustment of the handrail is realized through the structure, compared with the existing lifting handrail, the structure is undoubtedly simplified, and accessories are reduced; the connecting structure between the connecting seat 5 and the supporting rod 6 is simple and convenient to install; the production and processing cost of the handrail can be reduced; the cam wrench 17 is controlled to rotate to control the movement of the chuck 10a and the locking and unlocking of the support rod 6; the design is ingenious, the operation is very convenient, only the cam wrench 17 needs to be rotated, and the practicability is very high.

Claims

1. The utility model provides a handrail lifting adjusting device which characterized in that: comprises an armrest component and a supporting frame for supporting the armrest component; the armrest component comprises an armrest and a connecting seat, and the armrest is arranged on the connecting seat; the support frame is provided with a support rod which is longitudinally arranged, and the connecting seat is connected to the support rod in a sliding manner; a locking mechanism is arranged between the connecting seat and the supporting rod, and the locking mechanism comprises an elastic clamping piece connected to the connecting seat; the elastic clamping piece is provided with a clamping head clamped between the connecting seat and the supporting rod, and a clamping tooth and a clamping groove which are in clamping fit are arranged between the clamping head and the supporting rod; the locking mechanism also comprises a cam wrench acting on the chuck, the cam wrench is connected to the connecting seat and rotates to drive the chuck to move; when the handrail is in a normal use state, the cam on the cam wrench extrudes the chuck to enable the chuck to be attached to the supporting rod, and the clamping teeth are clamped with the clamping grooves; when the handrail is lifted and adjusted, the cam wrench is rotated to enable the elastic clamping piece to elastically reset, the clamping head is separated from the supporting rod, and the clamping teeth are separated from the clamping grooves.

2. The handrail lift adjustment device of claim 1, wherein: the cam wrench is rotationally connected to one side of the connecting seat away from the supporting rod; when the handrail is in a normal use state, the cam wrench covers the connecting seat downwards; when the armrest is lifted and adjusted, the cam spanner is turned outwards and opened.

3. The handrail lift adjustment device of claim 1, wherein: the elastic clamping piece is in a strip shape and is bent; the clamping head is positioned at the upper end of the elastic clamping piece, and the lower end of the elastic clamping piece is fixedly connected to one side, away from the supporting rod, of the connecting seat.

4. The handrail lift adjustment device of claim 3, wherein: the connecting seat on be equipped with and control the rotation mounting groove that runs through, elasticity fastener upper end pass this rotation mounting groove so that the dop is located between connecting seat and the bracing piece.

5. The handrail lift adjustment device of claim 4, wherein: the cam on the cam spanner is rotationally connected in the rotating installation groove, and the cam rotates to act on the clamping head in a butt joint mode.

6. The handrail lift adjustment device of claim 4, wherein: an elastic reset device is also arranged between the connecting seat and the elastic clamping piece, the elastic reset device comprises a spring, one end of the spring is abutted against the connecting seat, and the other end of the spring is abutted against the elastic clamping piece; when the clamping head is extruded by the cam to be jointed with the supporting rod, the spring generates elastic deformation to provide the elastic force for resetting the elastic clamping piece.

7. The handrail lift adjustment device of claim 1, wherein: the latch is longitudinally arranged on the chuck; the clamping grooves are arranged on the supporting rod in a wavy longitudinal interval.

8. The handrail lift adjustment device of claim 7, wherein: the two sides of the clamping head are also provided with guide blocks protruding towards the direction of the supporting rod, and the supporting rod is correspondingly provided with two sliding grooves along the length direction; the length of the guide block is longer than that of the latch.

9. The handrail lift adjustment device of claim 1, wherein: the support rod is provided with a sliding seat which protrudes outwards and is in sliding fit with the connecting seat; a sliding guide mechanism is arranged between the sliding seat and the connecting seat; the sliding guide mechanism comprises a slide rail and a slide rail, the slide rail is arranged on one of the sliding seat or the connecting seat, and the slide rail is correspondingly arranged on the other of the sliding seat or the connecting seat.

10. The handrail lift adjustment device of claim 9, wherein: along the width direction of the sliding seat, two sides of the sliding seat are respectively inwards sunken to form the slide ways, and the slide ways are arranged along the length direction of the supporting rod; correspondingly, two sides of the connecting seat close to the sliding seat end respectively extend towards the middle direction of the connecting seat to form sliding rails, and the sliding rails are arranged along the length direction of the connecting seat; the slide and the slide rail are matched to ensure that the connecting seat is limited to slide along the length direction of the supporting rod.

11. A seat, characterized by: comprising a seat and an armrest lifting and lowering device as claimed in any one of claims 1 to 10, said support being fixedly connected to the seat.