CN218264646U - Anti-overturning handrail - Google Patents

Abstract

The utility model discloses a prevent handrail that overturns, including the handrail, the operating assembly, fixing base and spacing subassembly, the operating assembly includes fixed button, remove the button, first piece and the driving medium that resets, the one end of driving medium is equipped with supports the portion of holding, the one end and the fixing base of handrail rotate to be connected, spacing subassembly includes the spacer pin, the second resets and spacing seat, the outer wall that supports the portion of holding is close to the spacer pin slope along the direction of orientation handrail gradually, the spacer pin can be when removing button pulling driving medium and remove, receive supporting the portion of holding and act on and insert the spacing inslot, rotate with the relative fixing base of restriction handrail. The anti-overturning handrail can realize the overturning of the handrail relative to the fixed seat by shifting the moving button, is high in operation convenience, can prevent the handrail from overturning due to misoperation, and has good safety protection performance.

Description

Anti-overturning handrail

Technical Field

The utility model relates to a handrail technical field especially relates to an anti-overturning handrail.

Background

For avoiding colliding with and reducing the space and taking up, the handrail has the folding function of upset usually, when needing the handrail to support, expandes the handrail again, and when the handrail used, it is folding to overturn because of user's maloperation easily, has the potential safety hazard, among the correlation technique, adopts inserted sheet or bolt structure restriction handrail upset, nevertheless needs the manual cartridge of carrying out of user, and the location degree of difficulty of inserted sheet and bolt is big, and maneuverability is relatively poor.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides an anti-overturning handrail can prevent the handrail upset, and the convenient degree of operation is high.

According to the utility model discloses an anti-overturning handrail of first aspect embodiment, include:

the armrest is internally provided with a first accommodating cavity;

the operating assembly is at least partially accommodated in the first accommodating cavity and comprises a fixed button, a movable button, a first reset piece and a transmission piece, two ends of the first reset piece are respectively connected to the fixed button and the movable button, part of the movable button protrudes out of the armrest and can move relative to the armrest, one end of the transmission piece is connected with the movable button, and the other end of the transmission piece is provided with an abutting part;

the inner part of the fixed seat is provided with a second accommodating cavity, one end of the handrail is inserted into the second accommodating cavity and is rotatably connected with the fixed seat, and the inner wall of the fixed seat is provided with a limiting groove;

the limiting assembly comprises a limiting pin, a second resetting piece and a limiting seat, the limiting seat is fixed on the handrail, the limiting pin penetrates through the fixing seat and can move relative to the fixing seat, one end of the limiting pin faces the limiting groove, and two ends of the second resetting piece are respectively connected to the limiting pin and the fixing seat along the moving direction of the limiting pin;

the abutting part is accommodated in the second accommodating cavity, the outer wall of the abutting part gradually approaches the limiting pin along the direction towards the handrail and inclines, and the limiting pin can be inserted into the limiting groove under the abutting action of the abutting part when the moving button pulls the transmission part to move so as to limit the handrail to rotate relative to the fixed seat.

According to the utility model discloses prevent upset handrail has following beneficial effect at least:

the embodiment of the utility model provides an in provide a prevent upset handrail, remove the button through stirring and can realize the upset of the relative fixing base of handrail, the operation convenience degree is high to can prevent that the handrail from overturning because of the maloperation, have good safety protection performance.

According to some embodiments of the utility model, the handrail includes handrail portion and supporting part, the one end of supporting part with the fixing base rotates to be connected, handrail portion connect in the other end of supporting part and orientation the lateral part protrusion of supporting part sets up, part remove the button protrusion extremely the outside of handrail portion.

According to some embodiments of the present invention, the transmission member includes a flexible portion, the abutting portion is connected to an end portion of the flexible portion, and the flexible portion is capable of being flexibly bent.

According to some embodiments of the present invention, the armrest includes a guide body, the guide body is accommodated in the armrest portion and the inside of the support portion, the inside of the guide body is provided with a guide passage, at least a portion of the flexible portion is accommodated in the guide passage, and the flexible portion can be moved in the guide passage.

According to some embodiments of the utility model, spacing subassembly still includes guide holder and the third piece that resets, the guide holder is fixed in the handrail, the guide holder has the guiding hole, support hold portion accept in the guiding hole, the third resets both ends of piece and is followed support the moving direction who holds the portion connect respectively in support hold portion with the inner wall of guide holder, just the third resets and is located support hold the portion orientation one side of handrail.

According to some embodiments of the utility model, the lateral part of guide holder have with the opening of guiding hole intercommunication, the spacer pin can pass the opening with support portion butt.

According to some embodiments of the utility model, the handrail still includes the connecting piece, the connecting piece includes first connecting portion and second connecting portion, first connecting portion holding in the first intracavity that holds, second connecting portion holding in the second holds the intracavity and rotates with the fixing base to be connected, the connecting piece has the installation cavity, spacing unit mount in the installation cavity.

According to some embodiments of the utility model, first connecting portion are relative the outer wall protrusion of second connecting portion sets up, first connecting portion butt in the fixing base orientation the terminal surface of handrail, the handrail with the fixing base is rotated through the pivot and is connected, the fixing base is equipped with first connecting hole, the second connecting portion are equipped with the second connecting hole, the pivot is worn to locate first connecting hole with in the second connecting hole.

According to some embodiments of the utility model, the handrail with the fixing base rotates through the pivot to be connected, the pivot is worn to locate the fixing base with the handrail, the lateral wall of fixing base has the mouth of dodging, it is located to dodge the mouth one side of pivot central line, on the fixing base with dodge the terminal surface and the handrail butt of the relative lateral wall of mouth.

According to some embodiments of the utility model, the dodge mouth is located the fixing base dorsad one side of handrail portion.

Additional aspects and advantages of the invention 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 invention.

Drawings

The invention is further described with reference to the following figures and examples, in which:

fig. 1 is a schematic view of an embodiment of the anti-roll handrail of the present invention;

fig. 2 is an exploded view of an embodiment of the anti-roll handrail of the present invention;

fig. 3 is a cross-sectional view of one embodiment of the anti-roll handrail of the present invention;

FIG. 4 is a cross-sectional view of one embodiment of the operating assembly;

FIG. 5 is a schematic view of the position limiting assembly in the first state;

FIG. 6 is a schematic view of the stop assembly in a second state;

fig. 7 is a schematic structural view of an embodiment of a stopper pin.

Reference numerals:

the armrest 100, the first receiving cavity 110, the guide groove 120, the armrest portion 130, the upper cover 131, the base 132, the support portion 140, the guide body 150, the guide passage 151, the link 160, the first connection portion 161, the second connection portion 162, the mounting cavity 163, and the second connection hole 164;

the fixing base 200, the second accommodating cavity 210, the limiting groove 220, the first connecting hole 230 and the avoiding opening 240;

the operating assembly 300, the fixing button 310, the moving button 320, the toggle part 321, the moving part 322, the first reset element 330, the transmission element 340, the abutting part 341 and the flexible part 342;

the limiting component 400, the limiting pin 410, the limiting protrusion 411, the second resetting piece 420, the limiting seat 430, the guide seat 440, the guide hole 441, the opening 442 and the third resetting piece 450;

a rotating shaft 500.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the directional descriptions, such as the directions or positional relationships indicated by upper, lower, front, rear, left, right, etc., are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but not for indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means is one or more, a plurality of means is two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If there is a description of first and second for the purpose of distinguishing technical features only, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the terms such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the terms in the present invention by combining the specific contents of the technical solution.

In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The embodiment of the utility model provides an in the embodiment provides a prevent handrail that overturns, refer to fig. 1 to 3, prevent that the handrail that overturns includes handrail 100 and fixing base 200, handrail 100 is used for supplying the user to support, and fixing base 200 provides the installation basis for handrail 100, and handrail 100 rotates to be connected in fixing base 200 to relative fixing base 200 overturns, folds. The anti-overturn armrest further comprises an operating assembly 300 and a limiting assembly 400, wherein the operating assembly 300 is matched with the limiting assembly 400 to prevent the armrest 100 from overturning relative to the fixed seat 200 due to misoperation.

Specifically, a first accommodating cavity 110 is formed in the armrest 100, a second accommodating cavity 210 is formed in the fixing base 200, and at least a portion of the operating assembly 300 is accommodated in the first accommodating cavity 110, as shown in fig. 4, the operating assembly 300 includes a fixing button 310, a moving button 320, a first resetting member 330 and a transmission member 340, the fixing button 310, the first resetting member 330 and a portion of the moving button 320 are located in the first accommodating cavity 110, and a portion of the moving button 320 protrudes out of the armrest 100 for a user to toggle; the two ends of the first reset component 330 are respectively connected to the fixed button 310 and the movable button 320, when the movable button 320 is toggled, the movable button moves relative to the armrest 100 and compresses the first reset component 330, so that the first reset component 330 is deformed, and after the movable button 320 is released, the movable button is returned by the restoring force of the first reset component 330.

As shown in fig. 5, one end of the handrail 100 is inserted into the fixing base 200 and is rotatably connected to the fixing base 200, and a limiting groove 220 for limiting the turning is formed on the inner wall of the fixing base 200. The limiting component 400 is located in the second accommodating cavity 210, the limiting component 400 includes a limiting pin 410, a second resetting piece 420 and a limiting seat 430, the limiting seat 430 is fixed on the portion of the handrail 100 inserted into the fixing seat 200, the limiting pin 410 is arranged in the fixing seat 200 in a penetrating manner and can move relative to the fixing seat 200, one end of the limiting pin 410 is arranged towards the limiting groove 220 and can pass through the limiting groove 220 by moving, two ends of the second resetting piece 420 are connected to the limiting pin 410 and the fixing seat 200 along the moving direction of the limiting pin 410 respectively, the second resetting piece 420 can be compressed by the movement of the limiting pin 410, the second resetting piece 420 is deformed, and the limiting pin 410 can return under the restoring force action of the second resetting piece 420.

One end of the transmission member 340 is connected to the moving button 320, the other end of the transmission member 340 is provided with a supporting portion 341, the supporting portion 341 is inserted into the second accommodating cavity 210, and an outer wall of the supporting portion 341 gradually inclines toward the limit pin 410 along a direction toward the armrest 100. As shown in fig. 5, when the user needs to hold the handrail 100, the outer wall of the maximum cross section of the holding portion 341 abuts against the limit pin 410, the limit pin 410 is kept inserted in the limit groove 220, and when the handrail 100 has a tendency to rotate relative to the fixing base 200, the limit pin 410 and the groove wall of the limit groove 220 limit each other, so as to prevent the handrail 100 from rotating, thereby achieving the effect of preventing the handrail 100 from turning over; as shown in fig. 6, when the handrail 100 needs to be folded, the user pulls the moving button 320, the moving button 320 pulls the transmission member 340 to move, the abutting portion 341 moves synchronously, and the limit pin 410 is withdrawn from the limit groove 220 under the restoring force of the second restoring member 420 along with the change of the abutting position inclination of the abutting portion 341 and the limit pin 410, at this time, the rotation of the handrail 100 is not limited, and the handrail 100 can be folded relative to the fixing base 200 by rotating the handrail 100.

Therefore, the embodiment of the present invention provides an anti-overturn armrest 100, which can realize the overturn of the armrest 100 relative to the fixed seat 200 by toggling the moving button 320, and has high operation convenience, and can prevent the armrest 100 from overturning due to misoperation, and has good safety protection performance.

As shown in fig. 4, the moving button 320 includes a shifting portion 321 and a moving portion 322, the moving portion 322 is located in the first accommodating cavity 110, the armrest 100 is provided with a guide groove 120 communicated with the first accommodating cavity 110, the shifting portion 321 is disposed in the guide groove 120, and the guide groove 120 guides the movement of the moving button 320. Further, the moving part 322 is limited between the fixing button 310 and the inner wall of the armrest 100, and the moving part 322 is connected to the transmission member 340, so that the moving part 322 can stably move between the fixing button 310 and the inner wall of the armrest 100.

As shown in fig. 7, the outer wall of the limiting pin 410 is protruded with a limiting protrusion 411, and two ends of the second restoring member 420 are respectively connected to the limiting protrusion 411 and the inner wall of the fixing base 200 at a side away from the abutting portion 341. Therefore, when the stop pin 410 is abutted by the abutting portion 341 and moves toward the stop groove 220, the second reset piece 420 is compressed, and after the abutting force between the abutting portion 341 and the stop pin 410 disappears, the second reset piece 420 gives the return force of the stop pin 410 toward the abutting portion 341, so that the stop pin 410 is withdrawn from the stop groove 220 and returns.

As shown in fig. 2, in order to facilitate a user to hold the armrest 100 or to support an arm or the like by the armrest 100, the armrest 100 includes an armrest portion 130 and a support portion 140, one end of the support portion 140 is inserted into the second receiving cavity 210 and rotatably connected to the fixing base 200, and the armrest portion 130 is connected to the other end of the support portion 140 and protrudes toward a side portion of the support portion 140. Since the armrest portion 130 extends to the side of the support portion 140, the armrest portion 130 has a large operable area for a user to hold or support an arm.

In one embodiment, as shown in fig. 3, a part of the moving button 320 protrudes out of the outer wall of the supporting portion 140, and the user can pull the abutting portion 341 to move by dialing the part of the moving button 320 exposed out of the supporting portion 140; in this case, the transmission member 340 may be a hard member, and the reciprocating movement of the abutting portion 341 is accomplished by the restoring force of the first resetting member 330 and the toggle action of the user on the moving button 320.

In another embodiment, a portion of the moving button 320 protrudes to the outer wall of the armrest portion 130, so that the user can simultaneously toggle the moving button 320 while holding the armrest portion 130, thereby greatly improving the operational convenience of the armrest 100.

Furthermore, the support portion 140 is usually located below the armrest portion 130, and a part of the moving button 320 protrudes to a side of the armrest portion 130 facing the support portion 140, that is, the protruding portion of the moving button 320 is disposed at a lower side of the armrest portion 130, which is more beneficial for a user to toggle the moving button 320 with a hand.

It should be noted that, since the support portion 140 and the armrest portion 130 are integrally formed into a bent structure, the hard transmission member 340 can only move along one direction along with the moving button 320, so that the transmission member 340 is likely to interfere with the armrest portion 130 when moving. Based on this, in the embodiment of the present invention, the transmission member 340 includes the flexible portion 342, the flexible portion 342 can be flexibly bent, and the abutting portion 341 is connected to an end of the flexible portion 342; therefore, the flexible portion 342 can be easily placed in a bent state and is located inside the armrest portion 130 and the support portion 140, and the movement of the flexible portion 342 does not interfere with the armrest portion 130 and the support portion 140.

The flexible portion 342 may be made of flexible materials such as silicone rubber, etc., so that the flexible portion 342 has a certain flexibility after being made; alternatively, the flexible portion 342 may be made of a thin wire, so that the flexible portion 342 can be bent to some extent.

As a further improvement of the above embodiment, as shown in fig. 2 and 3, the armrest 100 further includes a guide body 150, the guide body 150 is accommodated inside the armrest portion 130 and the support portion 140, the guide body 150 is bent and adapted to the shape of the armrest 100, a guide channel 151 is provided inside the guide body 150, and at least a portion of the flexible portion 342 is accommodated in the guide channel 151; the guide channel 151 is used to guide the movement of the flexible portion 342, and prevent the flexible portion 342 from bending and twisting in the armrest 100, so as to ensure that the abutting portion 341 can move following the movement of the moving button 320.

The guide body 150 may be configured as a bent pipe, which may be a plastic pipe formed by injection molding or a metal pipe formed by a metal molding process. Since the guiding body 150 is in the shape of a curved needle, in order to facilitate the guiding body 150 to be installed inside the armrest 100, as shown in fig. 2, the armrest part 130 includes an upper cover 131 and a base 132, the upper cover 131 covers the base 132, and is detachably connected to the base 132; when the guide body 150 is installed, the guide body 150 is inserted into the supporting portion 140, and then the upper cover 131 is assembled to the base 132, which is convenient to assemble.

Because the flexibility of the flexible portion 342 is high, after the transmission member 340 moves along with the moving button 320, the flexible portion 342 cannot react quickly and drives the abutting portion 341 to return, as shown in fig. 5 and fig. 6, in an embodiment of the present invention, the limiting assembly 400 further includes a guide seat 440 and a third resetting member 450, the guide seat 440 is fixed inside the supporting portion 140, the guide seat 440 has a guide hole 441, the abutting portion 341 is accommodated in the guide hole 441, two ends of the third resetting member 450 are respectively connected to inner walls of the abutting portion 341 and the guide seat 440 along a moving direction of the abutting portion 341, when the moving button 320 pulls the flexible portion 342 to move, the abutting portion 341 moves along with the flexible portion 342 and compresses the third resetting member 450, so that the third resetting member 450 deforms, and after the moving button 320 is released, the abutting portion 341 returns by a restoring force of the third resetting member 450.

It should be noted that, the first restoring member 330, the second restoring member 420, and the third restoring member 450 may be all selected from a spring, an elastic sheet, and other elements capable of elastically deforming and having elastic restoring force; in addition, the first restoring member 330, the second restoring member 420 and the third restoring member 450 can be tower-shaped springs, so as to meet the installation requirement of a smaller space and bear a larger load. The first, second and third reset parts 330, 420 and 450 can be assembled in an abutting manner, so that the first, second and third reset parts 330, 420 and 450 can be conveniently mounted; taking the first reset element 330 as an example, two ends of the first reset element 330 respectively abut against the moving button 320 and the fixing button 310, and provide elastic restoring force to the moving button 320.

In addition, the side of the guide seat 440 further has an opening 442 communicating with the guide hole 441, the opening 442 is disposed toward the limit pin 410, the limit pin 410 can pass through the opening 442 and abut against the outer wall of the abutting portion 341, and the moving direction of the limit pin 410 is perpendicular to the moving direction of the abutting portion 341, so that the limit pin 410 can abut against different positions of the abutting portion 341 when the abutting portion 341 moves, and move relative to the limit seat 430 to be inserted into the limit groove 220 or withdrawn from the limit groove 220.

To facilitate the installation of the position limiting assembly 400, in an embodiment of the present invention, the armrest 100 further includes a connecting member 160, and the connecting member 160 is used to connect the supporting portion 140 and the fixing base 200 and provide an installation basis for the position limiting assembly 400. Specifically, the connecting element 160 includes a first connecting portion 161 and a second connecting portion 162, the first connecting portion 161 is accommodated in the first accommodating cavity 110, the second connecting portion 162 is accommodated in the second accommodating cavity 210 and rotatably connected to the fixing base 200, an installation cavity 163 is disposed inside the connecting element 160, and the limiting component 400 is installed in the installation cavity 163.

In the process of assembling the armrest 100 and the fixing seat 200, the limit assembly 400 is first installed in the installation cavity 163 of the second connecting portion 162, then the second connecting portion 162 is inserted into the second accommodating cavity 210 of the fixing seat 200, the guide body 150 is installed in the armrest portion 130 and the support portion 140, the first connecting portion 161 is inserted into the support portion 140, and meanwhile, the fastening member is inserted into the support portion 140, the guide body 150 and the first connecting portion 161, so that the connection of the connecting member 160 to the armrest 100 and the fixing seat 200 is realized while the limit assembly 400 is installed on the connecting member 160.

Further, the inner wall of the second connecting portion 162 is in threaded fit with the outer wall of the guide seat 440, and the outer wall of the limiting seat 430 is in threaded fit with the outer wall of the second connecting portion 162 and is staggered with the threaded connection position of the guide seat 440. Therefore, the guide seat 440 and the limiting seat 430 can be mounted on the second connecting portion 162 by means of screw locking.

The embodiment of the utility model provides an in, connecting piece 160 still be equipped with fixing base 200 complex limit structure to in the assembling process, fix a position connecting piece 160 and fixing base 200's hookup location. Specifically, the first connecting portion 161 protrudes from an outer wall of the second connecting portion 162, and after the second connecting portion 162 is inserted into the second accommodating cavity 210, the first connecting portion 161 abuts against an end surface of the fixing base 200 facing the armrest 100 to limit an insertion depth of the second connecting portion 162; moreover, the armrest 100 is rotatably connected to the fixing base 200 through the rotating shaft 500, the fixing base 200 is provided with the first connecting hole 230, the second connecting hole 162 is provided with the second connecting hole 164, and the abutting position of the first connecting portion 161 and the fixing base 200 is just the communicating position of the first connecting hole 230 and the second connecting hole 164, so that when the rotating shaft 500 is assembled, the first connecting portion 161 and the fixing base 200 abut against each other, the first connecting hole 230 is communicated with the second connecting hole 164, and the rotating shaft 500 is inserted into the first connecting hole 230 and the second connecting hole 164, so that the rotating connection between the fixing base 200 and the armrest 100 can be realized, and the assembly convenience is high.

As shown in fig. 3, since the second connecting portion 162 is inserted into the fixing base 200, an escape opening 240 for escaping the second connecting portion 162 when the armrest 100 rotates is disposed at a side portion of the fixing base 200, so as to prevent the second connecting portion 162 from interfering with the fixing base 200. Further, the escape opening 240 is located at one side of the central line of the rotating shaft 500, and the end surface of the side portion of the fixing base 200 opposite to the escape opening 240 abuts against the handrail 100, so that the side wall of the fixing base 200 opposite to the escape opening 240 limits the handrail 100 to limit the rotation direction of the handrail 100, and the handrail 100 can only rotate towards the escape opening 240, and because the rotation of the handrail 100 towards the escape opening 240 is limited, the handrail can only rotate when a user dials the moving button 320, and therefore, the handrail 100 can be effectively prevented from being turned over relative to the fixing base 200 due to misoperation.

Further, the avoiding opening 240 is disposed on a side of the fixing base 200 facing away from the armrest portion 130, so that when a user grips or presses the armrest portion 130, a side wall of the fixing base 200 facing away from the avoiding opening 240 abuts against the armrest 100 to support the armrest 100, and meanwhile, a limiting effect on the armrest 100 is achieved; on one hand, the armrest 100 is prevented from rotating relative to the fixing seat 200 for the user to hold or press, and on the other hand, the armrest 100 is provided with a supporting force, so that the armrest 100 can stably support the hand or arm of the user.

One side of the second connecting portion 162 facing away from the opening 240 has an arc-shaped chamfer to prevent the second connecting portion 162 from colliding with or interfering with the inner wall of the fixing base 200 when the armrest 100 rotates relative to the fixing base 200.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

Claims (10)

1. Prevent upset handrail, its characterized in that includes:

the armrest is internally provided with a first accommodating cavity;

the operating assembly is at least partially accommodated in the first accommodating cavity and comprises a fixed button, a movable button, a first resetting piece and a transmission piece, two ends of the first resetting piece are respectively connected to the fixed button and the movable button, part of the movable button protrudes out of the armrest and can move relative to the armrest, one end of the transmission piece is connected with the movable button, and the other end of the transmission piece is provided with a butting part;

the handrail fixing device comprises a fixing seat, a handrail and a handle, wherein a second accommodating cavity is formed in the fixing seat, one end of the handrail is inserted into the second accommodating cavity and is rotatably connected with the fixing seat, and a limiting groove is formed in the inner wall of the fixing seat;

the limiting assembly comprises a limiting pin, a second resetting piece and a limiting seat, the limiting seat is fixed on the handrail, the limiting pin penetrates through the fixing seat and can move relative to the fixing seat, one end of the limiting pin faces the limiting groove, and two ends of the second resetting piece are respectively connected to the limiting pin and the fixing seat along the moving direction of the limiting pin;

the abutting part is accommodated in the second accommodating cavity, the outer wall of the abutting part gradually approaches the limiting pin along the direction towards the handrail and inclines, and the limiting pin can be inserted into the limiting groove under the abutting action of the abutting part when the moving button pulls the transmission part to move so as to limit the handrail to rotate relative to the fixed seat.

2. The anti-roll handrail of claim 1, wherein the handrail comprises a handrail portion and a support portion, one end of the support portion is rotatably connected to the fixed seat, the handrail portion is connected to the other end of the support portion and is protruded toward a side portion of the support portion, and a portion of the moving button is protruded to an outside of the handrail portion.

3. The anti-roll handrail of claim 2, wherein the transmission member comprises a flexible portion, the holding portion being connected to an end of the flexible portion, the flexible portion being capable of flexible bending.

4. The roll-over prevention handrail of claim 3, wherein the handrail comprises a guide body, the guide body is accommodated inside the handrail portion and the support portion, a guide channel is provided inside the guide body, and at least a portion of the flexible portion is accommodated in the guide channel and is movable within the guide channel.

5. The anti-overturning handrail of claim 3, wherein the limiting assembly further comprises a guide seat and a third resetting member, the guide seat is fixed to the handrail, the guide seat has a guide hole, the abutting portion is accommodated in the guide hole, two ends of the third resetting member are respectively connected to the abutting portion and the inner wall of the guide seat along the moving direction of the abutting portion, and the third resetting member is located on one side of the abutting portion facing the handrail.

6. The anti-roll handrail of claim 5, wherein the side of the guide seat has an opening communicating with the guide hole, and the stopper pin can pass through the opening to abut against the abutting portion.

7. The anti-overturning armrest according to claim 1, further comprising a connecting piece, wherein the connecting piece comprises a first connecting portion and a second connecting portion, the first connecting portion is accommodated in the first accommodating cavity, the second connecting portion is accommodated in the second accommodating cavity and rotatably connected with a fixed seat, the connecting piece has a mounting cavity, and the limiting component is mounted in the mounting cavity.

8. The anti-overturning handrail of claim 7, wherein the first connecting portion protrudes from an outer wall of the second connecting portion, the first connecting portion abuts against an end surface of the fixing base facing the handrail, the handrail is rotatably connected to the fixing base through a rotating shaft, the fixing base is provided with a first connecting hole, the second connecting portion is provided with a second connecting hole, and the rotating shaft is inserted into the first connecting hole and the second connecting hole.

9. The anti-overturn armrest according to claim 2, wherein the armrest is rotatably connected to the fixing seat through a rotating shaft, the rotating shaft is inserted into the fixing seat and the armrest, a side wall of the fixing seat has an avoiding opening, the avoiding opening is located on one side of a center line of the rotating shaft, and an end surface of a side wall of the fixing seat opposite to the avoiding opening abuts against the armrest.

10. The anti-roll armrest according to claim 9, wherein the escape opening is located on a side of the fixed seat facing away from the armrest portion.

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