CN220832441U - Armrest and seat - Google Patents

Abstract

The utility model discloses an armrest and a seat, which relate to the technical field of seats, wherein the armrest comprises a mounting seat, a shell, an adjusting mechanism and a control mechanism, the adjusting mechanism is arranged in the shell and comprises a fixed shaft, a ratchet wheel, a gear driving plate, a limiting mechanism, a movable part, a spring plate, a switching part and a resetting part, the control mechanism is arranged in the shell and can be abutted or separated from the switching part, when the control mechanism is abutted with the switching part, the control mechanism provides a driving force for enabling the switching part to rotate to be separated from the gear driving plate, and when the control mechanism is separated from the switching part, the resetting part drives the switching part to reset to be abutted with the gear driving plate. The handrail provided by the embodiment of the utility model can switch the rotating stroke so as to be better suitable for use in different scenes.

Description

Armrest and seat

Technical Field

The utility model relates to the technical field of seats, in particular to a handrail and a seat.

Background

In the related art, the armrest may be rotated up and down according to the user's adjustment, thereby providing a proper support angle for the user's elbow. However, the rotation strokes required by the armrests in different use scenes are not the same, and the armrests are difficult to reach the use demands of users in different use scenes.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the handrail which can switch the rotating stroke so as to be better suitable for different scenes.

The utility model also provides a seat with the armrest.

According to the handrail disclosed by the embodiment of the first aspect of the utility model, the handrail comprises a mounting seat, a shell, an adjusting mechanism and a control mechanism, wherein the adjusting mechanism is mounted in the shell and comprises a fixed shaft, a ratchet wheel, a gear driving plate, a limiting mechanism, a movable piece, a spring piece, a switching piece and a reset piece, the fixed shaft is fixed on the mounting seat, the ratchet wheel is fixed on the fixed shaft and is provided with a first tooth part, the gear driving plate is fixed on the fixed shaft and is provided with a first gear groove and a second gear groove, a limiting bulge is arranged between the first gear groove and the second gear groove, the limiting mechanism is rotatably connected with the fixed shaft and is connected with the shell so as to synchronously move with the shell, the limiting mechanism is provided with a mounting position, the movable piece is mounted on the mounting position and is provided with a second tooth part, the spring piece is mounted on the mounting position and is abutted on one side of the movable piece, which is away from the first tooth part, so that elastic force meshed with the first tooth part is provided for the second tooth part, the switching piece is rotatably connected with the limiting mechanism, and the limiting mechanism is enabled to be matched with the switching piece in a limiting way; the control mechanism is arranged in the shell and can be abutted or separated from the switching piece, when the control mechanism is abutted with the switching piece, the control mechanism provides driving force for enabling the switching piece to rotate to be separated from the gear driving plate for the switching piece, and when the control mechanism is separated from the switching piece, the reset piece drives the switching piece to reset to be abutted to the gear driving plate.

The handrail provided by the embodiment of the utility model has at least the following beneficial effects: under the initial condition, the switchover piece butt in first gear inslot, when operating control mechanism, make control mechanism and switchover piece butt, control mechanism provides the drive power that makes the switchover piece rotate to the separation with the gear driver plate for the switchover piece, if the switchover piece is spacing by spacing arch this moment, can rotate the casing, make switchover piece and spacing arch separation, the switchover piece alright be separated with the gear driver plate, afterwards the switchover piece can remove to the corresponding position in second gear inslot, operating control mechanism this moment, make control mechanism and switchover piece separation, reset piece drives the switchover piece and resets and so as to butt in second gear inslot, thereby make the handrail realize the switching of rotation stroke, use in order to better adapt to different scenes.

According to one embodiment of the present utility model, two gear dials are provided, the two gear dials are respectively located at two sides of the limiting mechanism along the axial direction of the fixed shaft, the switching member includes a first abutting portion, a second abutting portion and a connecting portion, the first abutting portion and the second abutting portion are respectively located at two sides of the limiting mechanism along the axial direction of the fixed shaft, and can be respectively abutted with the two gear dials, and the connecting portion is connected between the first abutting portion and the second abutting portion.

According to one embodiment of the present utility model, the armrest further includes a coil spring mounted to the fixed shaft and coupled to the stopper mechanism to provide an elastic force for returning the stopper mechanism to a downward rotation.

According to one embodiment of the utility model, the limiting mechanism comprises a first baffle plate, a second baffle plate and a third baffle plate, wherein the first baffle plate and the second baffle plate are arranged at intervals along the axial direction of the fixed shaft, the first baffle plate and the second baffle plate are respectively provided with a first notch and a second notch which are oppositely arranged, the third baffle plate is fixed between the first baffle plate and the second baffle plate and is arranged at intervals with the ratchet wheel, and the first notch, the second notch, the third baffle plate and the ratchet wheel define the mounting position.

According to one embodiment of the utility model, the limiting mechanism is further provided with a clamping position communicated with the mounting position, the movable piece can be clamped in the clamping position, the movable piece is provided with a deflector rod, and the deflector rod can be abutted with the switching piece so that the switching piece drives the movable piece to be separated from the clamping position and enter the mounting position.

According to one embodiment of the utility model, the limiting mechanism is provided with a limiting rod, one end of the switching piece is positioned between the limiting rod and the control mechanism, and the control mechanism can be abutted with one end of the switching piece and drive one end of the switching piece to be abutted with the limiting rod.

According to one embodiment of the utility model, the control mechanism comprises a pushing piece, a swinging rod, a pushing buckle and a tension spring, wherein the pushing piece is slidably connected in the shell, the swinging rod is rotatably connected in the shell, one end of the swinging rod is rotatably connected with the pushing piece, the pushing buckle is slidably installed in the shell and can drive the other end of the swinging rod to move, one end of the tension spring is connected with the shell, and the other end of the tension spring is connected with one end of the swinging rod far away from the pushing piece.

According to one embodiment of the utility model, the pushing piece comprises a push rod, a pressure spring and a pushing head, wherein an installation cavity is arranged in the pushing head, the push rod is rotatably connected with the swing rod and is in sliding fit with the installation cavity, and the pressure spring is arranged in the installation cavity and is in butt joint with the push rod and the pushing head.

According to one embodiment of the utility model, a limit groove is formed in one end, away from the pushing piece, of the swing rod, a protruding block is arranged on the push buckle, and the protruding block is located in the limit groove.

A seating furniture according to a second aspect of the present utility model includes the armrest described in the above embodiments.

The seat provided by the embodiment of the utility model has at least the following beneficial effects: by adopting the handrail of the embodiment of the first aspect, the handrail can switch the rotating stroke so as to be better suitable for use in different scenes. Therefore, the seat can meet the use requirements of users in different scenes, and the use experience of the users is improved.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic view of an armrest according to one embodiment of the present utility model;

FIG. 2 is a schematic view of an armrest according to one embodiment of the present utility model with an upper shell removed;

FIG. 3 is a schematic view of an embodiment of the present utility model with the upper shell removed from the armrest;

FIG. 4 is a schematic view of an embodiment of the present utility model with the upper shell removed from the armrest;

FIG. 5 is a schematic view of a portion of a handrail according to an embodiment of the present utility model;

FIG. 6 is a schematic view of a portion of a handrail in another state according to an embodiment of the present utility model;

FIG. 7 is a partially exploded view of an armrest according to one embodiment of the present utility model;

FIG. 8 is a schematic view of a switching member and a reset member of an armrest according to one embodiment of the utility model;

FIG. 9 is a schematic view of a control mechanism for an armrest according to one embodiment of the utility model;

FIG. 10 is a schematic view of a control mechanism for an armrest according to one embodiment of the present utility model;

FIG. 11 is a schematic view of a control mechanism for an armrest according to an embodiment of the present utility model;

Fig. 12 is a cross-sectional view of a pusher of an armrest of an embodiment of the utility model.

Reference numerals:

an armrest 1000;

A mounting base 100;

a housing 200; an upper case 210; a lower case 220;

An adjustment mechanism 300; a fixed shaft 310; a ratchet 320; a first tooth 321; a gear dial 330; a first gear groove 331; a second gear groove 332; a limit protrusion 333; a limit mechanism 340; a first baffle 341; a first notch 3411; a second baffle 342; second notch 3421; a third baffle 343; a mounting location 344; a clamping position 345; a stop lever 346; a spacing shell 347; a movable member 350; a second tooth 351; a lever 352; a spring piece 360; a switching member 370; a first abutment 371; a second abutment 372; a connection portion 373; a reset member 380;

A control mechanism 400; a pusher 410; a push rod 411; a compression spring 412; a pusher 413; a mounting cavity 4131; swing rod 420; a limit groove 421; push button 430; a bump 431; a tension spring 440;

coil spring 500.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that references to orientation, such as the orientation or positional relationship indicated above, below, inside, outside, etc., are based on the orientation or positional relationship shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the description of the present utility model, the description of the first and second is only for the purpose of distinguishing technical features, and should not be construed as indicating or implying relative importance or implying the number of technical features indicated or the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

In the related art, the armrest may be rotated up and down according to the user's adjustment, thereby providing a proper support angle for the user's elbow. However, the rotation strokes required by the armrests in different use scenes are not the same, and the armrests are difficult to reach the use demands of users in different use scenes.

To this end, the present utility model proposes an example of an armrest 1000, which is described below with reference to fig. 1 to 12 of the drawings.

Referring to fig. 1 and 2, an armrest 1000 according to an embodiment of the present utility model includes a mount 100 and a housing 200, the housing 200 including an upper case 210 and a lower case 220 connected to each other. Referring to fig. 2 and 3, the armrest 1000 further includes an adjustment mechanism 300 and a control mechanism 400. The adjusting mechanism 300 is installed in the housing 200, and the adjusting mechanism 300 includes a fixed shaft 310, a ratchet 320, a gear dial 330, a limiting mechanism 340, a spring piece 360, a switching piece 370 and a resetting piece 380. The fixed shaft 310 is fixed to the mounting base 100, the ratchet 320 is fixed to the fixed shaft 310, and the ratchet 320 is provided with a first tooth 321. Referring to fig. 3 and 4, the gear dial 330 is fixed to the fixed shaft 310, the gear dial 330 is provided with a first gear groove 331 and a second gear groove 332, and a limit protrusion 333 is provided between the first gear groove 331 and the second gear groove 332. The gear dial 330 is disc-shaped as a whole, and the first gear groove 331, the second gear groove 332, and the limiting boss 333 are all provided on the peripheral wall of the gear dial 330, and the limiting boss 333 separates the first gear groove 331 and the second gear groove 332.

With continued reference to fig. 3 and 4, the spacing mechanism 340 is rotatably coupled to the fixed shaft 310, and the spacing mechanism 340 is coupled to the housing 200 to move synchronously with the housing 200. It should be noted that, one end of the limiting mechanism 340 is rotatably connected to the fixed shaft 310, and the other end is fixedly connected to the housing 200. In addition, the limiting mechanism 340 is provided with an installation position 344, the movable member 350 is installed at the installation position 344, and the movable member 350 is provided with a second tooth portion 351. Referring to fig. 5, the elastic piece 360 is mounted on the mounting portion 344 and abuts against a side of the movable member 350 facing away from the first tooth 321, so as to provide an elastic force for the second tooth 351 to engage with the first tooth 321. That is, the second tooth 351 of the movable member 350 is engaged with the first tooth 321 of the ratchet 320 by the elastic piece 360. It can be appreciated that when the user rotates the housing 200 of the armrest 1000 upward, the movable member 350 jumps due to the driving force of the user and the elastic force of the elastic piece 360, so that the user can fix the limiting mechanism 340 and the housing 200 after rotating the housing 200 upward, and the housing 200 does not fall.

Referring to fig. 3 and 4, the switching member 370 is rotatably mounted on the limiting mechanism 340, and the reset member 380 connects the limiting mechanism 340 and the switching member 370, so as to drive the switching member 370 to abut against the gear dial 330, and enable the switching member 370 to be in limiting fit with the limiting protrusion 333. It can be appreciated that when the end of the switching member 370 is stressed, the switching member 370 can rotate, and when the switching member 370 is not stressed, the switching member 370 can be reset to an initial state under the action of the reset member 380, and can abut against the gear dial 330 and be in limit fit with the limit protrusion 333.

With continued reference to fig. 3 and 4, the control mechanism 400 is mounted within the housing 200 and is capable of abutting or separating from the switch 370. When the control mechanism 400 abuts on the switching member 370, the control mechanism 400 supplies a driving force to the switching member 370 to rotate the switching member 370 to be separated from the gear dial 330. When the control mechanism 400 is separated from the switching member 370, the reset member 380 drives the switching member 370 to reset to abut against the gear dial 330. In the initial state, the switching member 370 abuts against the first gear groove 331 of the gear dial 330 and is capable of being engaged with the limit protrusion 333 in a limit manner. That is, the switching member 370 can move only in the first gear groove 331. When the user manipulates the control mechanism 400 to bring the control mechanism 400 into contact with the switching member 370, the control mechanism 400 rotates to the switching member 370 to a driving force separated from the gear dial 330. It can be understood that the switching member 370 abuts against the first gear slot 331, and may be in a limited fit with the limiting protrusion 333 or may not be in a limited fit with the limiting protrusion 333. When the switching member 370 is not in the limit engagement with the limit projection 333, the switching member 370 directly rotates and is separated from the gear dial 330; when the switching member 370 is in a limit engagement with the limit projection 333, the user rotates the housing 200 to separate the switching member 370 from the limit projection 333, and the switching member 370 can be rotated and separated from the gear dial 330. It should be noted that, when the switching member 370 is separated from the gear dial 330 and the subsequent housing 200 rotates synchronously with the stop mechanism 340, the switching member 370 moves along with the stop mechanism 340, and during the movement, the switching member 370 does not contact the structure of the gear dial 330, for example, the switching member 370 does not contact the stop protrusion 333. Therefore, the switching member 370 can be moved to the corresponding position of the second gear slot 332, and the control mechanism 400 is operated to separate the control mechanism 400 from the switching member 370, and the reset member 380 drives the switching member 370 to reset to be abutted in the second gear slot 332, so that the handrail 1000 can realize switching of the rotation stroke, and thus the handrail is better adapted to different situations. Note that, the limiting protrusion 333 is inclined toward the first gear slot 331, so the switching member 370 cannot pass over the limiting protrusion 333 to reach the second gear slot 332 when being abutted against the first gear slot 331, but can pass over the limiting protrusion 333 to reach the first gear slot 331 when being abutted against the second gear slot 332. Therefore, after the user switches the rotational stroke of the armrest 1000 by performing the above operation, the user directly pulls the housing 200 to rotate the housing 200 and the limiting mechanism 340 upward synchronously, so that the switching member 370 is changed from abutting against the second gear groove 332 to abutting against the first gear groove 331, thereby switching the armrest 1000 back to the original rotational stroke.

Referring to fig. 3, the limiting mechanism 340 is provided with a limiting rod 346, one end of the switching member 370 is located between the limiting rod 346 and the control mechanism 400, and the control mechanism 400 can abut against one end of the switching member 370 and drive one end of the switching member 370 to abut against the limiting rod 346. Note that the stopper lever 346 is used to prevent the switching member 370 from being excessively rotated. In one embodiment, the stop lever 346 is located at one end of the stop mechanism 340, and the stop mechanism 340 is fixedly connected to the housing 200 through the stop lever 346, i.e., the stop mechanism 340 and the housing 200 move synchronously through the stop lever 346.

Referring to fig. 5 and 6, in the armrest 1000 according to an embodiment of the present utility model, the limiting mechanism 340 is further provided with a clamping position 345, the clamping position 345 is communicated with the mounting position 344, and the movable member 350 can be clamped to the clamping position 345. In the initial state, the movable member 350 is mounted at the mounting position 344, and the second tooth portion 351 is engaged with the first tooth portion 321. When the user pulls the housing 200 of the armrest 1000 to the highest position, the limiting mechanism 340 rotates until the movable member 350 abuts against the end wall of the groove where the first tooth 321 is located. It should be noted that, under the action of the end wall of the groove where the first tooth 321 is located, the second tooth 351 of the movable member 350 is separated from the first tooth 321 of the ratchet 320, and the movable member 350 moves and is clamped to the clamping position 345. It will be appreciated that the user may now manipulate the housing 200 to rotate downwardly. Referring to fig. 4 and 5, the movable member 350 is provided with a lever 352, and the lever 352 can abut against the switching member 370, so that the switching member 370 drives the movable member 350 to disengage from the engaging position 345 and enter the mounting position 344. That is, in the process that the user manipulates the housing 200 to rotate downwards, the switching member 370 is eventually abutted against the limiting protrusion 333, after that, the housing 200 continues to rotate downwards, the limiting mechanism 340 continues to rotate downwards, and the moving member 350 also continues to move, while the switching member 370 cannot rotate synchronously with the limiting mechanism 340 as before due to being abutted against the limiting protrusion 333, but also rotates independently, and abuts against the deflector 352 in the independent rotating process, so as to drive the moving member 350 to be separated from the clamping position 345 and enter the mounting position 344. Referring to fig. 3, in one embodiment, the armrest 1000 further includes a coil spring 500, the coil spring 500 being mounted to the fixed shaft 310 and coupled to the spacing mechanism 340 to provide a downward rotational return spring force to the spacing mechanism 340. Therefore, when the user rotates the housing 200 of the armrest 1000 up to the highest position, so that the movable member 350 enters the locking position 345, the housing 200 automatically rotates down under the elastic force of the coil spring 500 until the switching member 370 drives the movable member 350 to disengage from the locking position 345 and enter the mounting position 344.

Referring to fig. 7, an armrest 1000 in accordance with an embodiment of the present utility model includes a limit mechanism 340 including a first bezel 341, a second bezel 342, and a third bezel 343. Wherein, the first baffle 341 and the second baffle 342 are arranged at intervals along the axial direction of the fixed shaft 310, and the first baffle 341 and the second baffle 342 have a first notch 3411 and a second notch 3421, respectively. I.e. the first baffle 341 has a first gap 3411 and the second baffle 342 has a second gap 3421. In addition, the first notch 3411 and the second notch 3421 are disposed opposite to each other, and the shape and size of the first notch 3411 matches the shape and size of the second notch 3421. The third baffle 343 is fixed between the first baffle 341 and the second baffle 342 and is spaced apart from the ratchet 320. The first notch 3411, the second notch 3421, the third bezel 343, and the ratchet 320 define the mounting location 344. It will be appreciated that by the arrangement described above, the moveable member 350 and the resilient member 360 are able to be mounted well to the mounting location 344. Referring to fig. 2, the limiting mechanism 340 further includes a limiting case 347, and the limiting case 347 is connected to the first and second shutters 341 and 342, respectively, and is used to place the movable member 350 to fly out from the vicinity of the ratchet 320.

Referring to fig. 2 and 4, in the armrest 1000 according to an embodiment of the present utility model, there are two gear dials 330, and the two gear dials 330 are respectively located at both sides of the stopper mechanism 340 in the axial direction of the fixed shaft 310. As shown in fig. 8, the switching member 370 includes a first contact portion 371, a second contact portion 372, and a connecting portion 373, the first contact portion 371 and the second contact portion 372 are located on both sides of the stopper mechanism 340 in the axial direction of the fixed shaft 310, respectively, and can be brought into contact with the two shift dials 330, respectively, and the connecting portion 373 is connected between the first contact portion 371 and the second contact portion 372. The first contact portion 371, the second contact portion 372, and the connecting portion 373 are integral members. It will be appreciated that by the above arrangement, the armrest 1000 is made more stable in switching rotational travel.

Referring to fig. 2 and 9, the armrest 1000 according to an embodiment of the present utility model includes a push member 410, a swing link 420, a push button 430, and a tension spring 440. The pushing member 410 is slidably connected to the housing 200, the swing rod 420 is rotatably connected to the housing 200, and one end of the swing rod is rotatably connected to the pushing member 410. The push button 430 is slidably mounted on the housing 200, and can drive the other end of the swing link 420 to move. One end of the tension spring 440 is connected with the housing 200, and the other end is connected with one end of the swing link 420 away from the pusher 410. It should be noted that, when the push button 430 drives the other end of the swing rod 420 to move, the swing rod 420 rotates, and the other end of the push button 430 drives the pushing member 410 to move, so that the pushing member 410 is abutted to or separated from the switching member 370. It should be noted that, the tension spring 440 is used to provide a tensile force to keep the pushing member 410 in a state of abutting against the switching member 370 or keep the pushing member 410 in a state of separating from the switching member 370. It will be appreciated that referring to fig. 9, the pusher 410 is at an acute angle to the swing link 420, and the pusher 410 is separated from the switching member 370. Referring to fig. 10 and 11, at this time, the pusher 410 makes an obtuse angle with the swing link 420, and the pusher 410 abuts against the switching member 370.

Referring to fig. 10, it should be noted that, a limiting groove 421 is disposed at an end of the swing rod 420 away from the pushing member 410, a protrusion 431 is disposed on the push button 430, and the protrusion 431 is disposed in the limiting groove 421. It will be appreciated that with the above arrangement, the push button 430 can be moved more conveniently to rotate the swing link 420. The size and shape of the limiting groove 421 and the protrusion 431 are not particularly limited herein. Referring to fig. 11 and 12, in one embodiment, the pusher 410 includes a push rod 411, a compression spring 412, and a pusher 413. Wherein, a mounting cavity 4131 is provided in the push head 413, the push rod 411 is rotatably connected with the swing rod 420 and is slidably matched with the mounting cavity 4131, and the compression spring 412 is provided in the mounting cavity 4131 and is abutted with the push rod 411 and the push head 413. It can be appreciated that, with the above-mentioned scheme, when the pushing member 410 abuts against the switching member 370, the compression spring 412 can apply pressure to make the pushing head 413 always abut against the switching member 370.

The utility model also provides a seat of an embodiment, which comprises the armrest 1000 of an embodiment of the utility model. The armrest 1000 can switch the rotation travel to better adapt to the use of different scenes. Therefore, the seat can meet the use requirements of users in different scenes, and the use experience of the users is improved.

The seat adopts all the technical solutions of the armrest 1000 in the above embodiments, so that the seat has at least all the beneficial effects brought by the technical solutions in the above embodiments, and will not be described in detail herein.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, and finally, it should be described that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present utility model.

Claims (10)

1. The handrail is characterized by comprising:

A mounting base;

A housing;

the adjusting mechanism comprises a fixed shaft, a ratchet wheel, a gear driving plate, a limiting mechanism, a movable piece, an elastic piece, a switching piece and a resetting piece, wherein the fixed shaft is fixed on the mounting seat, the ratchet wheel is fixed on the fixed shaft and is provided with a first tooth part, the gear driving plate is fixed on the fixed shaft and is provided with a first gear groove and a second gear groove, a limiting bulge is arranged between the first gear groove and the second gear groove, the limiting mechanism is rotationally connected with the fixed shaft and is connected with the housing so as to synchronously move with the housing, the limiting mechanism is provided with a mounting position, the movable piece is mounted on the mounting position and is provided with a second tooth part, the elastic piece is mounted on one side of the movable piece, which is away from the first tooth part, so as to provide elastic force meshed with the first tooth part for the second tooth part, the switching piece is rotationally mounted on the limiting mechanism, and the resetting piece is connected with the limiting mechanism and the switching piece so as to drive the driving plate to be in a position-limited mode and can be matched with the switching piece in a limiting mode;

And the control mechanism is arranged in the shell and can be abutted or separated from the switching piece, when the control mechanism is abutted with the switching piece, the control mechanism provides driving force for enabling the switching piece to rotate to be separated from the gear driving plate for the switching piece, and when the control mechanism is separated from the switching piece, the reset piece drives the switching piece to reset so as to be abutted to the gear driving plate.

2. The armrest according to claim 1, wherein two gear dials are provided, the two gear dials are located on both sides of the limiting mechanism in an axial direction of the fixed shaft, the switching member includes a first abutting portion, a second abutting portion, and a connecting portion, the first abutting portion and the second abutting portion are located on both sides of the limiting mechanism in the axial direction of the fixed shaft, and are capable of abutting with the two gear dials, respectively, and the connecting portion is connected between the first abutting portion and the second abutting portion.

3. The armrest of claim 1 further comprising a coil spring mounted to the fixed shaft and coupled to the spacing mechanism to provide a return spring force to the spacing mechanism for downward rotation.

4. The armrest of claim 1, wherein the spacing mechanism comprises a first baffle, a second baffle, and a third baffle, the first baffle and the second baffle are arranged at intervals along an axial direction of the fixed shaft, the first baffle and the second baffle respectively have a first notch and a second notch that are oppositely arranged, the third baffle is fixed between the first baffle and the second baffle and is arranged at intervals with the ratchet, and the first notch, the second notch, the third baffle, and the ratchet define the mounting position.

5. The handrail of claim 1, wherein the limiting mechanism is further provided with a clamping position communicated with the mounting position, the movable member can be clamped to the clamping position, the movable member is provided with a deflector rod, and the deflector rod can be abutted to the switching member so that the switching member drives the movable member to be separated from the clamping position and enter the mounting position.

6. The handrail of claim 1, wherein the limit mechanism is provided with a limit lever, one end of the switching member is located between the limit lever and the control mechanism, and the control mechanism can abut against one end of the switching member and drive one end of the switching member to abut against the limit lever.

7. The armrest of claim 1, wherein the control mechanism comprises a pushing member, a swinging rod, a pushing button and a tension spring, the pushing member is slidably connected in the housing, the swinging rod is rotatably connected in the housing, one end of the swinging rod is rotatably connected with the pushing member, the pushing button is slidably mounted in the housing and can drive the other end of the swinging rod to move, one end of the tension spring is connected with the housing, and the other end of the tension spring is connected with one end of the swinging rod away from the pushing member.

8. The armrest of claim 7, wherein the pushing member comprises a push rod, a compression spring and a push head, wherein a mounting cavity is formed in the push head, the push rod is rotatably connected with the swing rod and is in sliding fit with the mounting cavity, and the compression spring is arranged in the mounting cavity and is in abutting connection with the push rod and the push head.

9. The handrail of claim 7, wherein a limit groove is formed in an end of the swing rod away from the pushing member, the push button is provided with a protruding block, and the protruding block is located in the limit groove.

10. A seating furniture comprising an armrest as claimed in any one of claims 1 to 9.