Side turning handrail structure

Abstract

The invention relates to a rollover handrail structure, which comprises a base, a handrail body, a handrail body and a handrail body, wherein two bases are arranged at the front end and the rear end of the base; the armrest cover is positioned above the base, can turn over around the left side or the right side of the base, and comprises an armrest cover lower cover, an armrest cover shaft body and an armrest cover upper cover; the two sets of pin shaft assemblies are arranged at the front end and the rear end of the lower armrest cover, each set of pin shaft assembly comprises two sets of pin shaft units located on the left side and the right side of the armrest cover shaft body, and each set of pin shaft unit comprises a pin shaft base and a locking pin shaft which can move in the front-back direction and lock or loosen the armrest cover shaft body and the base; the two starting assemblies are located on the left side and the right side of the armrest cover lower cover and symmetrically distributed, and each starting assembly comprises two moving blocks capable of synchronously moving in the left-right direction; and the four groups of fixed pulley assemblies are arranged between each group of pin shaft unit and the moving block and are in transmission connection with the pin shaft unit and the moving block. Compared with the prior art, the device is simple in structure and convenient to operate, and the risks of overturning critical point clamping stagnation and abnormal sound are greatly reduced.

Description

Technical Field

[0001] The invention relates to a vehicle armrest, in particular to a rollover armrest structure. Background Art

[0002] At present, most of the existing car armrests on the market only have basic supporting functions, but there are certain deficiencies in functional diversity and innovation. The opening structure is also relatively simple, which cannot meet people's needs for personalized and multifunctional armrests. The usual opening method is to flip forward and backward, and there are relatively few ways to open the side flip armrest. Due to the complexity of the structure, the existing side flip armrests on the market are often prone to jamming and abnormal noise at the flip critical point. Summary of the invention

[0003] The purpose of the present invention is to provide a rollover armrest structure in order to overcome the defects of the above-mentioned prior art. The structure is simple, easy to operate, and greatly reduces the risk of jamming and abnormal noise at the rollover critical point.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] A rollover handrail structure, comprising:

[0006] A base, with two pedestals provided at the front and rear ends;

[0007] An armrest cover located above the base and capable of turning around the left or right side of the base, comprising an armrest cover lower cover, two armrest cover shafts installed at the front and rear ends of the armrest cover lower cover, and an armrest cover upper cover located above the armrest cover lower cover and fixedly connected to the two armrest cover shafts;

[0008] Two sets of pin shaft assemblies are arranged at the front and rear ends of the lower cover of the armrest cover, each set of pin shaft assemblies includes two sets of pin shaft units located on the left and right sides of the armrest cover shaft body, and each set of pin shaft units includes a pin shaft seat and a locking pin shaft that can move in the front and rear directions and lock or release the armrest cover shaft body and the base;

[0009] Two groups of starting components are located on the left and right sides of the lower cover of the armrest cover and are symmetrically distributed, and each group of starting components includes two moving blocks that can move synchronously in the left and right directions;

[0010] And four groups of fixed pulley assemblies are arranged between each group of pin shaft units and the moving block and connect them in driving manner.

[0011] The working principle of the rollover handrail structure is:

[0012] 1. Flipping from the left side to the right side: When the button on the left side of the lower cover of the armrest cover is pressed, the two groups of the pin units located at the front and rear ends of the left side of the lower cover of the armrest cover are driven by the fixed pulley assembly to move forward and backward in the direction away from the armrest cover shaft body and the base, so that the armrest cover shaft body and the base on the left side of the lower cover of the armrest cover are unlocked, so that the armrest cover can be flipped from the left side to the right side;

[0013] 2. Flip from the right side to the left side: When the button on the right side of the lower cover of the armrest cover is pressed, the two groups of pin units located at the front and rear ends of the right side of the lower cover of the armrest cover are driven by the fixed pulley assembly to move forward and backward in the direction away from the armrest cover shaft and the base, so that the armrest cover shaft and the base on the right side of the lower cover of the armrest cover are unlocked, so that the armrest cover can be flipped from the right side to the left side.

[0014] Furthermore, in order to prevent the moving block on one side from moving after the moving block on the other side moves, the armrest cover shaft bodies on the left and right sides of the lower cover of the armrest cover are prevented from being unlocked from the base at the same time, and the armrest cover is prevented from being derailed on both sides at the same time. An erroneous opening limit assembly is arranged between the two groups of the starting assemblies, and the erroneous opening limit assembly is arranged so that when the two moving blocks on the left or right side of the lower cover move in the left and right directions until they abut against the erroneous opening limit assembly, the two moving blocks on the other side are restricted from moving in the left and right directions.

[0015] Furthermore, the moving block is divided into a left moving block and a right moving block which are arranged opposite to each other, and the left moving block and the right moving block are respectively provided with two blocks which are connected side by side as a whole;

[0016] The mis-opening limit assembly comprises a mis-opening limit block having the freedom to move in the front-back direction and located between the left moving block and the right moving block, and the mis-opening limit block cannot move in the left-right and upward directions;

[0017] The two end corner areas of the mis-opening limit block along the diagonal line are respectively provided with a first notch and a second notch facing the left moving block and the right moving block;

[0018] The end angle area of ​​the mis-opening limit block opposite to the first notch is provided with a first guiding inclined surface facing the right moving block, and one of the right moving blocks is provided with a second guiding inclined surface matching the first guiding inclined surface.

[0019] Furthermore, the mis-opening limit block is configured as follows:

[0020] When the left moving block moves to the right until one of the left moving block abuts against the first notch, the first guiding slope abuts against the right moving block having the second guiding slope, and the right moving block is restricted by the mis-opening limit block and cannot move to the left;

[0021] When the right moving block moves to the left until the second guide slope of one of the right moving blocks is in close contact with the first guide slope, and drives the mis-opening limit block to move forward and backward until the other right moving block abuts against the second notch, one of the left moving blocks abuts against the end angle area of ​​the mis-opening limit block opposite to the second notch, and the left moving block is restricted by the mis-opening limit block and cannot move to the right.

[0022] Furthermore, the mis-opening limit block is provided with guide grooves distributed in the front-back direction, and the mis-opening limit assembly further comprises a fixing column fixed to the lower cover of the armrest cover and slidably connected to the guide groove, a first fixing block located at one side of the mis-opening limit block, and a first resetting elastic member connecting the mis-opening limit block and the first fixing block. The first resetting elastic member plays the role of buffering and resetting.

[0023] Furthermore, the first return elastic member is a return spring.

[0024] Furthermore, the working principle of the mis-opening limit assembly is:

[0025] Under normal conditions, the left movable block has no contact with the erroneous opening limit block, the right movable block with the second guide slope is in close contact with the first guide slope of the erroneous opening limit block, and the fixed column is located at one end of the guide groove away from the first guide slope.

[0026] When the left moving block moves to the right until one of the left moving blocks abuts against the first notch, the other left moving block is located on the outside of the mis-opening limit block, and its stroke is synchronously limited; the first guide slope abuts against the right moving block having the second guide slope, and the right moving block is restricted by the mis-opening limit block and cannot move to the left. At this time, the fixed column is located at the end of the guide groove away from the first guide slope.

[0027] When the right moving block moves to the left until the second guide slope of one of the right moving blocks is in close contact with the first guide slope, due to the inclination of the first guide slope, the leftward movement of the right moving block will drive the mis-opening limit block to move in the front-back direction until the other right moving block abuts against the second notch, at which time one of the left moving blocks abuts against the end angle area of ​​the mis-opening limit block opposite to the second notch, and the left moving block is restricted by the mis-opening limit block and cannot move to the right. At this time, the fixing column is located at one end of the guide groove close to the first guide slope.

[0028] Furthermore, each group of the startup components also includes:

[0029] a button located on the side of the lower cover of the armrest cover;

[0030] A connecting piece connecting the button and the two moving blocks, the upper surface of which is provided with a labyrinth locking piece;

[0031] A second fixed block disposed between the two moving blocks;

[0032] And a second resetting elastic member connecting the second fixing block and the connecting member, wherein the second resetting elastic member plays a role of buffering and resetting.

[0033] Furthermore, the second return elastic member is a return spring.

[0034] Furthermore, the rollover armrest structure further comprises a lower cover bracket located between the lower cover of the armrest cover and the upper cover of the armrest cover; a button bracket located above the connecting member is arranged on the lower cover bracket, and a labyrinth structure for the labyrinth locking member to slide is arranged on the lower surface of the button bracket;

[0035] The maze structure is configured such that when the button is pressed, the moving block moves to the left or right to the farthest point; when the button is pressed again, the moving block returns to its original position.

[0036] Furthermore, the maze structure includes a first slide, a second slide, a locking island and a guide island, the locking island and the guide island are located between the first slide and the second slide, the guide island is located at one end of the first slide and the second slide, and the other ends of the first slide and the second slide are connected to each other;

[0037] The labyrinth locking element is a raised triangular structure.

[0038] Furthermore, the working principle of the maze structure and the maze locking member is:

[0039] Assume that the first slide is located at the front side and the second slide is located at the rear side. In the initial state, the labyrinth locking member is located at the connection between the first slide and the second slide. When the button located on the left side of the lower cover of the armrest cover is pressed, the button moves to the right, the two left moving blocks connected by the connecting member move to the right, the labyrinth locking member moves along the first slide, moves to the end of the first slide and reaches the guide island, releases the button, and the labyrinth locking member slides into the locking island under the action of the second reset elastic member. At this time, the stroke of the left moving block is limited and will not actively move in the left and right directions. When the button located on the left side of the lower cover of the armrest cover is pressed again, the button moves to the right, the two left moving blocks connected by the connecting member continue to move to the right, the labyrinth locking member slides into the second slide under the restriction of the position of the guide island and the locking island, releases the button, and the labyrinth locking member returns to its original position under the action of the second reset elastic member. The same principle applies to pressing the button located on the right side of the lower cover of the armrest cover.

[0040] Furthermore, after the maze structure and the maze locking piece are provided, when the button on the left is pressed for the first time, the locking pin is in an unlocked state, and there is a certain gap between the left moving block and the mis-opening limit block. The width of the gap is used for pressing the button again, but the distance is not enough to unlock the locking pin on the right.

[0041] Furthermore, the width of the gap is the distance that the labyrinth locking element moves from the locking island to the guide island.

[0042] Further, each fixed pulley assembly includes:

[0043] A plurality of fixed pulleys located between the moving block and the locking pin;

[0044] and a pull rope connecting the moving block and the locking pin shaft and winding around the surface of the fixed pulley. The pull rope changes the direction of the pulling force under the action of the fixed pulley, thereby driving and pulling the locking pin shaft to move in the forward and backward directions.

[0045] Furthermore, a torsion spring is provided on the locking pin. When the two locking pins on the left side of the lower cover of the armrest cover loosen the armrest cover shaft body and the base, the left side of the armrest cover is unlocked, and under the action of the torsion springs on the two locking pins on the right side of the lower cover of the armrest cover, the armrest cover automatically flips to the right side with the two locking pins on the right side of the lower cover of the armrest cover as the fixed axis of rotation. When the two locking pins on the right side of the lower cover of the armrest cover loosen the armrest cover shaft body and the base, the right side of the armrest cover is unlocked, and under the action of the torsion springs on the two locking pins on the left side of the lower cover of the armrest cover, the armrest cover automatically flips to the left side with the two locking pins on the left side of the lower cover of the armrest cover as the fixed axis of rotation.

[0046] Furthermore, each group of pin units also includes a third resetting elastic member for buffering and resetting. The third resetting elastic member is a resetting spring.

[0047] Compared with the prior art, the present invention has the following advantages:

[0048] (1) The present invention presses a button on one side to move the moving block on one side in the left-right direction, driving the pull rope to move, and through the transmission of the fixed pulley, driving the locking pin to move in the front-back direction, so that the locking pin releases the armrest cover shaft and the base, so that the base and the armrest cover are smoothly unlocked, and then the armrest cover is flipped to the left or right, greatly reducing the risk of jamming and abnormal noise at the flipping critical point. In addition, it has a simple structure, convenient and flexible operation, and stable movement, which improves the convenience of users when using it.

[0049] (2) The present invention effectively prevents the armrest cover shafts on the left and right sides of the armrest cover lower cover from being unlocked from the base at the same time by setting an error-opening limit assembly between the left moving block and the right moving block, thereby avoiding the situation where the left and right sides of the armrest cover are derailed at the same time.

[0050] (3) The mis-opening limit assembly of the present invention is different from the conventional mis-opening limit assembly that moves in the same direction as the moving block, and its moving direction is perpendicular to the direction of the moving block. When the left moving block moves to the right, the pushing effect of the left moving block on the right moving block can be effectively avoided, reducing the risk of failure of the right moving block. And when the armrest cover flips to the right, pressing the right moving block at this time will not cause the right moving block to move due to excessive pressing force, so that the locking pin on the right side is unlocked, which effectively improves safety and avoids the situation where the left and right sides of the armrest cover are derailed at the same time.

[0051] (4) The present invention provides a labyrinth structure and a labyrinth locking member, so that the locking pin shaft can remain unlocked after pressing a button once, thereby avoiding collision with the base when the armrest cover is closed and effectively avoiding the risk of jamming and abnormal noise at the flipping critical point. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a schematic diagram of the internal structure of the rollover handrail structure shown in the present invention;

[0053] Figure 2 A top view of the internal structure of the rollover handrail structure shown in the present invention;

[0054] Figure 3 An exploded view of the rollover handrail structure shown in the present invention;

[0055] Figure 4 It is a schematic diagram of the rollover armrest structure shown in the present invention being flipped from the left side to the right side;

[0056] Figure 5 It is a schematic diagram of the rollover armrest structure shown in the present invention being flipped from the right side to the left side;

[0057] Figure 6 It is a structural schematic diagram of the mis-opening limit assembly shown in the present invention;

[0058] Figure 7 It is a structural schematic diagram of the starting component shown in the present invention;

[0059] Figure 8 It is a structural schematic diagram of the maze structure shown in the present invention, wherein the dotted line A represents the moving trajectory of the maze locking member when the button is pressed for the first time, and the dotted line B represents the moving trajectory of the maze locking member when the button is pressed for the second time.

[0060] Description of the markings in the figure:

[0061] 1-base, 11-pedestal;

[0062] 2-starting assembly, 21-button, 22-moving block, 221-left moving block, 222-right moving block, 2221-second guiding inclined plane, 23-connecting member, 231-labyrinth locking member, 24-second fixing block, 25-second resetting elastic member, 26-button bracket, 27-labyrinth structure, 271-first slideway, 272-second slideway, 273-locking island, 274-guide island;

[0063] 3-fixed pulley assembly, 31-fixed pulley, 32-pull rope;

[0064] 4-pin assembly, 41-pin unit, 411-pin seat, 412-locking pin, 413-torsion spring, 414-third reset elastic member;

[0065] 5-armrest cover, 51-armrest cover lower cover, 52-armrest cover shaft, 53-armrest cover upper cover, 54-lower cover bracket;

[0066] 6-mis-opening limit assembly, 61-fixing column, 62-mis-opening limit block, 621-first notch, 622-second notch, 623-first guide slope, 624-guide groove, 63-first reset elastic member, 64-first fixing block. DETAILED DESCRIPTION

[0067] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments are implemented based on the technical solution of the present invention, and detailed implementation methods and specific operation processes are given, but the protection scope of the present invention is not limited to the following embodiments. In the following embodiments or embodiments, if there is no special description of the functional components or structures, it means that they are all conventional components or conventional structures used in the art to achieve the corresponding functions.

[0068] It should be noted that in the description of the present invention, the terms "front", "rear", "left", "right", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0069] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0070] A rollover handrail structure, comprising:

[0071] The base 1 has two bases 11 at its front and rear ends;

[0072] The armrest cover 5 is located above the base 1 and can be turned around the left or right side of the base 11, including an armrest cover lower cover 51, two armrest cover shafts 52 installed at the front and rear ends of the armrest cover lower cover 51, and an armrest cover upper cover 23 located above the armrest cover lower cover 51 and fixedly connected to the two armrest cover shafts 52;

[0073] Two groups of pin shaft assemblies 4 are arranged at the front and rear ends of the armrest cover lower cover 51, each group of pin shaft assemblies 4 includes two groups of pin shaft units 41 located at the left and right sides of the armrest cover shaft body 51, and each group of pin shaft units 41 includes a pin shaft seat 411 and a locking pin shaft 412 that can move in the front and rear directions and lock or release the armrest cover shaft body 52 and the base 11;

[0074] Two groups of starting components 2 are symmetrically distributed on the left and right sides of the armrest cover lower cover 51, and each group of starting components 2 includes two moving blocks 22 that can move synchronously in the left and right directions;

[0075] And four groups of fixed pulley assemblies 3 are arranged between each group of pin shaft units 41 and the moving block 22 and connected to each other in a transmission manner.

[0076] The working principle of the rollover handrail structure is:

[0077] 1. Flipping from the left side to the right side: When the button 21 on the left side of the armrest cover lower cover 51 is pressed, the two groups of the pin units 41 located at the front and rear ends of the left side of the armrest cover lower cover 51 are driven by the fixed pulley assembly 3 to move forward and backward in the direction away from the armrest cover shaft body 52 and the base 11, so that the armrest cover shaft body 52 and the base 11 on the left side of the armrest cover lower cover 51 are unlocked, so that the armrest cover 5 can be flipped from the left side to the right side;

[0078] 2. Flipping from the right side to the left side: When the button 21 located on the right side of the armrest cover lower cover 51 is pressed, the two groups of pin units 41 located at the front and rear ends of the right side of the armrest cover lower cover 51 are driven by the fixed pulley assembly 3 to move forward and backward in the direction away from the armrest cover shaft 52 and the base 11, so that the armrest cover shaft 52 and the base 11 located on the right side of the armrest cover lower cover 51 are unlocked, so that the armrest cover 5 can be flipped from the right side to the left side.

[0079] In some specific embodiments, in order to prevent the moving block 22 on one side from moving after the moving block 22 on the other side moves, the armrest cover shaft bodies 52 on the left and right sides of the armrest cover lower cover 51 are prevented from being unlocked from the base 11 at the same time, so as to avoid the armrest cover 5 from being derailed on both sides at the same time. An erroneous opening limit assembly 6 is arranged between the two groups of the starting assemblies 2, and the erroneous opening limit assembly 6 is arranged so that when the two moving blocks 22 on the left or right side of the lower cover 7 move in the left and right directions until they abut against the erroneous opening limit assembly 6, the two moving blocks 22 on the other side are restricted from moving in the left and right directions.

[0080] In some specific embodiments, the moving block 22 is divided into a left moving block 221 and a right moving block 222 which are arranged opposite to each other, and the left moving block 22 and the right moving block 222 are respectively provided with two pieces which are connected side by side as a whole;

[0081] The mis-opening limit assembly 6 includes a mis-opening limit block 62 which has the freedom to move in the front-back direction and is located between the left moving block 221 and the right moving block 222. The mis-opening limit block 62 cannot move in the left-right and upward directions.

[0082] The two end corner areas of the mis-opening limit block 62 along the diagonal line are respectively provided with a first notch 621 and a second notch 622 facing the left moving block 221 and the right moving block 222;

[0083] A first guiding slope 623 facing the right moving block 22 is provided at an end corner area of ​​the mis-opening limit block 62 opposite to the first notch 621 , and one of the right moving blocks 222 has a second guiding slope 2221 matching the first guiding slope 623 .

[0084] In some specific implementations, the mis-opening limit block 62 is configured as:

[0085] When the left moving block 221 moves rightward until one of the left moving block 221 abuts against the first notch 621, the first guiding slope 623 abuts against the right moving block 222 having the second guiding slope 2221, and the right moving block 222 is restricted by the mis-opening limit block 62 and cannot move leftward;

[0086] When the right moving block 222 moves to the left until the second guide slope 2221 of one of the right moving blocks 222 is in close contact with the first guide slope 623, and drives the mis-opening limit block 62 to move forward and backward to the other right moving block 222 against the second notch 622, one of the left moving blocks 221 against the end angle area of ​​the mis-opening limit block 62 opposite to the second notch 622, and the left moving block 221 is restricted by the mis-opening limit block 62 and cannot move to the right.

[0087] In some specific embodiments, the erroneous opening limit block 62 is provided with a guide groove 624 distributed in the front-to-back direction, and the erroneous opening limit assembly 6 further includes a fixing column 61 fixed to the armrest cover lower cover 51 and slidably connected to the guide groove 624, a first fixing block 64 located on one side of the erroneous opening limit block 62, and a first resetting elastic member 63 connecting the erroneous opening limit block 62 and the first fixing block 64. The first resetting elastic member 63 plays a role of buffering and resetting.

[0088] In some specific implementations, the first resetting elastic member 63 is a resetting spring.

[0089] In some specific implementations, the working principle of the mis-opening limit assembly 6 is:

[0090] Under normal conditions, the left moving block 221 has no contact with the erroneous opening limit block 62, wherein the right moving block 222 with the second guide bevel 2221 is in close contact with the first guide bevel 623 of the erroneous opening limit block 62, and the fixed column 61 is located at one end of the guide groove 624 away from the first guide bevel 623.

[0091] When the left moving block 221 moves to the right until one of the left moving blocks 221 abuts against the first notch 621, the other left moving block 221 is located on the outside of the mis-opening limit block 62, and its stroke is synchronously limited; the first guide slope 623 abuts against the right moving block 222 having the second guide slope 2221, and the right moving block 222 is restricted by the mis-opening limit block 62 and cannot move to the left. At this time, the fixed column 61 is located at the end of the guide groove 624 away from the first guide slope 623.

[0092] When the right moving block 222 moves to the left until the second guide slope 2221 of one of the right moving blocks 222 is in close contact with the first guide slope 623, due to the inclination of the first guide slope 623, the leftward movement of the right moving block 222 will drive the mis-opening limit block 62 to move forward and backward until the other right moving block 222 abuts against the second notch 622. At this time, one of the left moving blocks 221 abuts against the end angle area of ​​the mis-opening limit block 62 opposite to the second notch 622, and the left moving block 221 is restricted by the mis-opening limit block 62 and cannot move to the right. At this time, the fixing column 61 is located at one end of the guide slot 624 close to the first guide slope 623.

[0093] In some specific embodiments, each group of the starting components 2 further includes:

[0094] A button 21 located on the side of the armrest cover lower cover 51;

[0095] A connecting piece 23 connecting the button 21 and the two moving blocks 22, wherein a labyrinth locking piece 231 is provided on the upper surface thereof;

[0096] A second fixed block 24 disposed between the two moving blocks 22;

[0097] And a second resetting elastic member 25 connecting the second fixing block 24 and the connecting member 23, wherein the second resetting elastic member 25 plays the role of buffering and resetting.

[0098] In some specific implementations, the second resetting elastic member 25 is a resetting spring.

[0099] In some specific embodiments, the rollover armrest structure further includes a lower cover bracket 54 located between the armrest cover lower cover 51 and the armrest cover upper cover 53; the lower cover bracket 54 is provided with a button bracket 26 located above the connecting member 23, and the lower surface of the button bracket 26 is provided with a labyrinth structure 27 for the labyrinth locking member 231 to slide;

[0100] The maze structure 27 is configured such that when the button 21 is pressed, the moving block 22 moves to the left or right to the farthest point; when the button 21 is pressed again, the moving block 22 returns to its original position.

[0101] In some specific embodiments, the maze structure 27 includes a first slide 271, a second slide 272, a locking island 273 and a guide island 274, wherein the locking island 273 and the guide island 274 are located between the first slide 271 and the second slide 272, and the guide island 274 is located at one end of the first slide 271 and the second slide 272, and the other ends of the first slide 271 and the second slide 272 are connected to each other;

[0102] The labyrinth locking member 231 is a raised triangular structure.

[0103] In some specific implementations, the working principles of the labyrinth structure 27 and the labyrinth locking member 231 are as follows:

[0104] Assume that the first slide 271 is located at the front side and the second slide 272 is located at the rear side. In the initial state, the labyrinth locking member 231 is located at the connection between the first slide 271 and the second slide 272. When the button 21 located on the left side of the armrest cover lower cover 51 is pressed, the button 21 moves to the right, and the two left moving blocks 221 connected by the connecting member 23 move to the right. The labyrinth locking member 231 moves along the first slide 271, and reaches the guide island 274 after moving to the end of the first slide 271. Release the button 21, and the labyrinth locking member 231 slides into the locking island 273 under the action of the second reset elastic member 25. At this time, the travel of the left moving block 221 is limited and it will not actively move in the left and right directions. When the button 21 on the left side of the armrest cover lower cover 51 is pressed again, the button 21 moves to the right, and the two left moving blocks 221 connected by the connecting member 23 continue to move to the right, and the labyrinth locking member 231 slides into the second slideway 272 under the restriction of the position of the guide island 274 and the locking island 273, and the button 21 is released, and the labyrinth locking member 231 returns to its original position under the action of the second reset elastic member 25. The same principle applies to pressing the button 21 on the right side of the armrest cover lower cover 51.

[0105] In some specific embodiments, after the maze structure 27 and the maze locking piece 231 are provided, when the button 21 on the left side is pressed for the first time, the locking pin 412 is in an unlocked state, and there is a certain gap between the left moving block 221 and the mis-opening limit block 62. The width of the gap is used for pressing the button 21 again, but the distance is not enough to unlock the locking pin 412 on the right side.

[0106] In some specific embodiments, the width of the gap is the distance that the labyrinth locking member 231 moves from the locking island 273 to the guide island 274 .

[0107] In some specific embodiments, each fixed pulley assembly 3 includes:

[0108] A plurality of fixed pulleys 31 located between the moving block 22 and the locking pin 412;

[0109] And a pull rope 32 connecting the moving block 22 and the locking pin 412 and winding around the surface of the fixed pulley 31. Under the action of the fixed pulley 31, the pull rope 32 changes the direction of the pulling force, thereby driving the locking pin 412 to move in the forward and backward directions.

[0110] In some specific embodiments, a torsion spring 413 is provided on the locking pin 412. When the two locking pins 412 on the left side of the armrest cover lower cover 51 release the armrest cover shaft 52 and the base 11, the left side of the armrest cover 5 is unlocked, and under the action of the torsion springs 413 on the two locking pins 412 on the right side of the armrest cover lower cover 51, the armrest cover 5 automatically flips to the right side with the two locking pins 412 on the right side of the armrest cover lower cover 51 as the fixed axis of rotation. When the two locking pins 412 on the right side of the armrest cover lower cover 51 release the armrest cover shaft 52 and the base 11, the right side of the armrest cover 5 is unlocked, and under the action of the torsion springs 413 on the two locking pins 412 on the left side of the armrest cover lower cover 51, the armrest cover 5 automatically flips to the left side with the two locking pins 412 on the left side of the armrest cover lower cover 51 as the fixed axis of rotation.

[0111] In some specific embodiments, each group of pin units 41 further includes a third resetting elastic member 414 for buffering and resetting. The third resetting elastic member 414 is a resetting spring.

[0112] Example 1

[0113] A rollover handrail structure, such as Figures 1 to 3 As shown, including:

[0114] The base 1 has two bases 11 at its front and rear ends;

[0115] The armrest cover 5 is located above the base 1 and can be turned around the left or right side of the base 11, including an armrest cover lower cover 51, two armrest cover shafts 52 installed at the front and rear ends of the armrest cover lower cover 51, and an armrest cover upper cover 23 located above the armrest cover lower cover 51 and fixedly connected to the two armrest cover shafts 52;

[0116] Two groups of pin shaft assemblies 4 are arranged at the front and rear ends of the armrest cover lower cover 51, each group of pin shaft assemblies 4 includes two groups of pin shaft units 41 located at the left and right sides of the armrest cover shaft body 51, and each group of pin shaft units 41 includes a pin shaft seat 411 and a locking pin shaft 412 that can move in the front and rear directions and lock or release the armrest cover shaft body 52 and the base 11;

[0117] Two groups of starting components 2 are symmetrically distributed on the left and right sides of the armrest cover lower cover 51, and each group of starting components 2 includes two moving blocks 22 that can move synchronously in the left and right directions;

[0118] And four groups of fixed pulley assemblies 3 are arranged between each group of pin shaft units 41 and the moving block 22 and connected to each other in a transmission manner.

[0119] The working principle of the rollover handrail structure is:

[0120] 1. If Figure 4 As shown, flipping from the left side to the right side: when the button 21 located on the left side of the armrest cover lower cover 51 is pressed, the two groups of the pin units 41 located at the front and rear ends of the left side of the armrest cover lower cover 51 are driven by the fixed pulley assembly 3 to move forward and backward in the direction away from the armrest cover shaft body 52 and the base 11, so that the armrest cover shaft body 52 and the base 11 located on the left side of the armrest cover lower cover 51 are unlocked, so that the armrest cover 5 can be flipped from the left side to the right side;

[0121] 2. If Figure 5 As shown, flipping from the right side to the left side: when the button 21 located on the right side of the armrest cover lower cover 51 is pressed, the two groups of pin units 41 located at the front and rear ends of the right side of the armrest cover lower cover 51 are driven by the fixed pulley assembly 3 to move forward and backward in the direction away from the armrest cover shaft 52 and the base 11, so that the armrest cover shaft 52 and the base 11 located on the right side of the armrest cover lower cover 51 are unlocked, so that the armrest cover 5 can be flipped from the right side to the left side.

[0122] Example 2

[0123] As an important component of the rollover handrail structure of the present invention, this embodiment provides a mis-opening limit assembly 6, such as Figure 6 shown.

[0124] The error-opening limit assembly 6 is arranged between the two groups of the starting assemblies 2. The error-opening limit assembly 6 is arranged so that when the two moving blocks 22 located on the left or right side of the lower cover 7 move in the left and right directions until they abut against the error-opening limit assembly 6, the two moving blocks 22 on the other side are restricted from moving in the left and right directions.

[0125] In this embodiment, the moving block 22 is divided into a left moving block 221 and a right moving block 222 which are arranged opposite to each other. The left moving block 22 and the right moving block 222 are respectively provided with two pieces which are connected side by side as a whole.

[0126] The mis-opening limit assembly 6 includes a mis-opening limit block 62 which has the freedom to move in the front-back direction and is located between the left moving block 221 and the right moving block 222. The mis-opening limit block 62 cannot move in the left-right and upward directions.

[0127] The two end corner areas of the mis-opening limit block 62 along the diagonal line are respectively provided with a first notch 621 and a second notch 622 facing the left moving block 221 and the right moving block 222;

[0128] A first guiding slope 623 facing the right moving block 22 is provided at an end corner area of ​​the mis-opening limit block 62 opposite to the first notch 621 , and one of the right moving blocks 222 has a second guiding slope 2221 matching the first guiding slope 623 .

[0129] In this embodiment, the mis-opening limit block 62 is configured as:

[0130] When the left moving block 221 moves rightward until one of the left moving block 221 abuts against the first notch 621, the first guiding slope 623 abuts against the right moving block 222 having the second guiding slope 2221, and the right moving block 222 is restricted by the mis-opening limit block 62 and cannot move leftward;

[0131] When the right moving block 222 moves to the left until the second guide slope 2221 of one of the right moving blocks 222 is in close contact with the first guide slope 623, and drives the mis-opening limit block 62 to move forward and backward to the other right moving block 222 against the second notch 622, one of the left moving blocks 221 against the end angle area of ​​the mis-opening limit block 62 opposite to the second notch 622, and the left moving block 221 is restricted by the mis-opening limit block 62 and cannot move to the right.

[0132] In this embodiment, the erroneous opening limit block 62 is provided with a guide groove 624 distributed in the front-to-back direction, and the erroneous opening limit assembly 6 further includes a fixing column 61 fixed to the armrest cover lower cover 51 and slidably connected to the guide groove 624, a first fixing block 64 located on one side of the erroneous opening limit block 62, and a first resetting elastic member 63 connecting the erroneous opening limit block 62 and the first fixing block 64. The first resetting elastic member 63 plays the role of buffering and resetting.

[0133] In this embodiment, the first resetting elastic member 63 is a resetting spring.

[0134] In this embodiment, the working principle of the mis-opening limit assembly 6 is:

[0135] Under normal conditions, the left moving block 221 has no contact with the erroneous opening limit block 62, wherein the right moving block 222 with the second guide bevel 2221 is in close contact with the first guide bevel 623 of the erroneous opening limit block 62, and the fixed column 61 is located at one end of the guide groove 624 away from the first guide bevel 623.

[0136] When the left moving block 221 moves to the right until one of the left moving blocks 221 abuts against the first notch 621, the other left moving block 221 is located on the outside of the mis-opening limit block 62, and its stroke is synchronously limited; the first guide slope 623 abuts against the right moving block 222 having the second guide slope 2221, and the right moving block 222 is restricted by the mis-opening limit block 62 and cannot move to the left. At this time, the fixed column 61 is located at the end of the guide groove 624 away from the first guide slope 623.

[0137] When the right moving block 222 moves to the left until the second guide slope 2221 of one of the right moving blocks 222 is in close contact with the first guide slope 623, due to the inclination of the first guide slope 623, the leftward movement of the right moving block 222 will drive the mis-opening limit block 62 to move forward and backward until the other right moving block 222 abuts against the second notch 622. At this time, one of the left moving blocks 221 abuts against the end angle area of ​​the mis-opening limit block 62 opposite to the second notch 622, and the left moving block 221 is restricted by the mis-opening limit block 62 and cannot move to the right. At this time, the fixing column 61 is located at one end of the guide slot 624 close to the first guide slope 623.

[0138] Example 3

[0139] A rollover handrail structure, such as Figures 1 to 3 As shown, including:

[0140] The base 1 has two bases 11 at its front and rear ends;

[0141] The armrest cover 5 is located above the base 1 and can be turned around the left or right side of the base 11, including an armrest cover lower cover 51, two armrest cover shafts 52 installed at the front and rear ends of the armrest cover lower cover 51, and an armrest cover upper cover 23 located above the armrest cover lower cover 51 and fixedly connected to the two armrest cover shafts 52;

[0142] Two groups of pin shaft assemblies 4 are arranged at the front and rear ends of the armrest cover lower cover 51, each group of pin shaft assemblies 4 includes two groups of pin shaft units 41 located at the left and right sides of the armrest cover shaft body 51, and each group of pin shaft units 41 includes a pin shaft seat 411 and a locking pin shaft 412 that can move in the front and rear directions and lock or release the armrest cover shaft body 52 and the base 11;

[0143] Two groups of starting components 2 are symmetrically distributed on the left and right sides of the armrest cover lower cover 51, and each group of starting components 2 includes two moving blocks 22 that can move synchronously in the left and right directions;

[0144] And four groups of fixed pulley assemblies 3 are arranged between each group of pin shaft units 41 and the moving block 22 and connected to each other in a transmission manner.

[0145] In this embodiment, if Figure 6 As shown, in order to prevent the moving block 22 on one side from moving after the moving block 22 on the other side moves, the armrest cover shaft bodies 52 on the left and right sides of the armrest cover lower cover 51 are prevented from being unlocked from the base 11 at the same time, and the armrest cover 5 is prevented from being derailed on both sides at the same time. An erroneous opening limit assembly 6 is arranged between the two groups of the starting assemblies 2, and the erroneous opening limit assembly 6 is arranged so that when the two moving blocks 22 on the left or right side of the lower cover 7 move in the left and right directions until they abut against the erroneous opening limit assembly 6, the two moving blocks 22 on the other side are restricted from moving in the left and right directions.

[0146] In this embodiment, the moving block 22 is divided into a left moving block 221 and a right moving block 222 which are arranged opposite to each other. The left moving block 22 and the right moving block 222 are respectively provided with two pieces which are connected side by side as a whole.

[0147] The mis-opening limit assembly 6 includes a mis-opening limit block 62 which has the freedom to move in the front-back direction and is located between the left moving block 221 and the right moving block 222. The mis-opening limit block 62 cannot move in the left-right and upward directions.

[0148] The two end corner areas of the mis-opening limit block 62 along the diagonal line are respectively provided with a first notch 621 and a second notch 622 facing the left moving block 221 and the right moving block 222;

[0149] A first guiding slope 623 facing the right moving block 22 is provided at an end corner area of ​​the mis-opening limit block 62 opposite to the first notch 621 , and one of the right moving blocks 222 has a second guiding slope 2221 matching the first guiding slope 623 .

[0150] In this embodiment, the mis-opening limit block 62 is configured as:

[0151] When the left moving block 221 moves rightward until one of the left moving block 221 abuts against the first notch 621, the first guiding slope 623 abuts against the right moving block 222 having the second guiding slope 2221, and the right moving block 222 is restricted by the mis-opening limit block 62 and cannot move leftward;

[0152] When the right moving block 222 moves to the left until the second guide slope 2221 of one of the right moving blocks 222 is in close contact with the first guide slope 623, and drives the mis-opening limit block 62 to move forward and backward to the other right moving block 222 against the second notch 622, one of the left moving blocks 221 against the end angle area of ​​the mis-opening limit block 62 opposite to the second notch 622, and the left moving block 221 is restricted by the mis-opening limit block 62 and cannot move to the right.

[0153] In this embodiment, the erroneous opening limit block 62 is provided with a guide groove 624 distributed in the front-to-back direction, and the erroneous opening limit assembly 6 further includes a fixing column 61 fixed to the armrest cover lower cover 51 and slidably connected to the guide groove 624, a first fixing block 64 located on one side of the erroneous opening limit block 62, and a first resetting elastic member 63 connecting the erroneous opening limit block 62 and the first fixing block 64. The first resetting elastic member 63 plays the role of buffering and resetting.

[0154] In this embodiment, the first resetting elastic member 63 is a resetting spring.

[0155] In this embodiment, each group of the starting components 2 further includes:

[0156] A button 21 located on the side of the armrest cover lower cover 51;

[0157] A connecting piece 23 connecting the button 21 and the two moving blocks 22, wherein a labyrinth locking piece 231 is provided on the upper surface thereof;

[0158] A second fixed block 24 disposed between the two moving blocks 22;

[0159] And a second resetting elastic member 25 connecting the second fixing block 24 and the connecting member 23, wherein the second resetting elastic member 25 plays the role of buffering and resetting.

[0160] In this embodiment, the second resetting elastic member 25 is a resetting spring.

[0161] In this embodiment, if Figure 7 and 8 As shown, the rollover armrest structure further includes a lower cover bracket 54 located between the armrest cover lower cover 51 and the armrest cover upper cover 53; the lower cover bracket 54 is provided with a button bracket 26 located above the connecting member 23, and the lower surface of the button bracket 26 is provided with a labyrinth structure 27 for the labyrinth locking member 231 to slide;

[0162] The maze structure 27 is configured such that when the button 21 is pressed, the moving block 22 moves to the left or right to the farthest point; when the button 21 is pressed again, the moving block 22 returns to its original position.

[0163] In this embodiment, the maze structure 27 includes a first slide 271, a second slide 272, a locking island 273 and a guide island 274. The locking island 273 and the guide island 274 are located between the first slide 271 and the second slide 272. The guide island 274 is located at one end of the first slide 271 and the second slide 272. The other ends of the first slide 271 and the second slide 272 are connected to each other.

[0164] The labyrinth locking member 231 is a raised triangular structure.

[0165] In this embodiment, the first slideway 271 is located at the front side, and the second slideway 272 is located at the rear side.

[0166] In this embodiment, after the maze structure 27 and the maze locking piece 231 are provided, when the first push button 21 moves the left moving block 221 to the right to the maximum stroke, or the right moving block 222 moves to the left to the maximum stroke, it has a certain distance from the mis-opening limit block 62 for the button 21 to be pressed again, but the distance is not enough to unlock the locking pin 412.

[0167] In this embodiment, the distance is the distance that the labyrinth locking member 231 moves from the locking island 273 to the guide island 274 .

[0168] In this embodiment, each fixed pulley assembly 3 includes:

[0169] A plurality of fixed pulleys 31 located between the moving block 22 and the locking pin 412;

[0170] And a pull rope 32 connecting the moving block 22 and the locking pin 412 and winding around the surface of the fixed pulley 31. Under the action of the fixed pulley 31, the pull rope 32 changes the direction of the pulling force, thereby driving the locking pin 412 to move in the forward and backward directions.

[0171] In this embodiment, a torsion spring 413 is provided on the locking pin 412. When the two locking pins 412 on the left side of the armrest cover lower cover 51 release the armrest cover shaft 52 and the base 11, the left side of the armrest cover 5 is unlocked, and under the action of the torsion springs 413 on the two locking pins 412 on the right side of the armrest cover lower cover 51, the armrest cover 5 automatically flips to the right side with the two locking pins 412 on the right side of the armrest cover lower cover 51 as the fixed axis of rotation. When the two locking pins 412 on the right side of the armrest cover lower cover 51 release the armrest cover shaft 52 and the base 11, the right side of the armrest cover 5 is unlocked, and under the action of the torsion springs 413 on the two locking pins 412 on the left side of the armrest cover lower cover 51, the armrest cover 5 automatically flips to the left side with the two locking pins 412 on the left side of the armrest cover lower cover 51 as the fixed axis of rotation.

[0172] In this embodiment, each group of pin units 41 further includes a third resetting elastic member 414 for buffering and resetting. The third resetting elastic member 414 is a resetting spring.

[0173] The working principle of the rollover handrail structure is:

[0174] 1. Flip from left to right:

[0175] In the initial state, the labyrinth locking member 231 is located at the connection between the first slideway 271 and the second slideway 272. The left moving block 221 has no contact with the erroneous opening limit block 62, wherein the right moving block 222 with the second guiding inclined surface 2221 is close to the first guiding inclined surface 623 of the erroneous opening limit block 62, and there is a certain distance between the two, which is equal to the distance from the locking island 273 to the guiding island 274.

[0176] When the button 21 located on the left side of the armrest cover lower cover 51 is pressed, the button 21 moves to the right, the two left moving blocks 221 connected by the connecting member 23 move to the right, the labyrinth locking member 231 moves along the first slideway 271, moves to the end of the first slideway 271 and reaches the guide island 274, releases the button 21, and the labyrinth locking member 231 slides into the locking island 273 under the action of the second reset elastic member 25. At this time, the left moving block 221 moves to the right to abut against the first notch 621 of the mis-opening limit block 62, and the other left moving block 221 is located outside the mis-opening limit block 62, and its travel is synchronously limited; the first guide slope 623 abuts against the right moving block 222 having the second guide slope 2221, and the right moving block 222 is restricted by the mis-opening limit block 62 and cannot move to the left, and at this time, the fixed column 61 is located at the end of the guide groove 624 away from the first guide slope 623.

[0177] During the movement of the left moving block 221 to the right, the pull rope 32 pulls the two locking pins 412 at the front and rear ends on the left side to move forward and backward in the direction away from the armrest cover shaft 52 and the base 11, so that the armrest cover shaft 52 and the base 11 on the left side of the armrest cover lower cover 51 are unlocked, and under the action of the torsion spring 413 on the two locking pins 412 on the right side of the armrest cover lower cover 51, the armrest cover 5 automatically flips to the right side with the two locking pins 412 on the right side of the armrest cover lower cover 51 as the fixed axis of rotation. At this time, due to the restrictions of the mis-opening limit block 62 and the maze structure 27, the button 21 on the right side of the armrest cover lower cover 51 cannot be pressed, and the locking pin 412 is always in the unlocked state. When the armrest cover 5 is closed, the armrest cover 5 will not collide with the locking pin 412.

[0178] After closing the armrest cover 5, the button 21 on the left side of the armrest cover lower cover 51 is pressed again, and the labyrinth locking member 231 is restricted by the positions of the guide island 274 and the locking island 273 and slides into the second slideway 272. The button 21 is released, and the labyrinth locking member 231 returns to its original position under the action of the second reset elastic member 25. The pull rope 32 pulls the two locking pins at the front and rear ends on the left side to move forward and backward in the direction close to the armrest cover shaft body 52 and the base 11, so that the armrest cover shaft body 52 and the base 11 on the left side of the armrest cover lower cover 51 are locked.

[0179] 2. Flip from right to left:

[0180] In the initial state, the labyrinth locking member 231 is located at the connection between the first slideway 271 and the second slideway 272. The left moving block 221 has no contact with the erroneous opening limit block 62, wherein the right moving block 222 with the second guiding inclined surface 2221 is close to the first guiding inclined surface 623 of the erroneous opening limit block 62, and there is a certain distance between the two, which is equal to the distance from the locking island 273 to the guiding island 274.

[0181] When the button 21 located on the right side of the lower cover 51 of the armrest cover is pressed, the button 21 moves to the left, the two right moving blocks 222 connected by the connecting member 23 move to the left, and the labyrinth locking member 231 moves along the first slide 271, moves to the end of the first slide 271 and reaches the guide island 274, and the button 21 is released, and the labyrinth locking member 231 slides into the locking island 273 under the action of the second reset elastic member 25. At this time, the right moving block 222 moves to the left, driving the mis-opening limit block 62 to move in the front-back direction until the other right moving block 222 abuts against the second notch 622, and at this time, one of the left moving blocks 221 abuts against the end angle area of ​​the mis-opening limit block 62 opposite to the second notch 622, and the left moving block 221 is restricted by the mis-opening limit block 62 and cannot move to the right. At this time, the fixed column 61 is located at one end of the guide groove 624 close to the first guide inclined surface 623.

[0182] During the movement of the right moving block 222 to the left, the pull rope 32 pulls the two locking pins 412 at the front and rear ends on the right side to move forward and backward in the direction away from the armrest cover shaft 52 and the base 11, so that the armrest cover shaft 52 and the base 11 on the right side of the armrest cover lower cover 51 are unlocked, and under the action of the torsion spring 413 on the two locking pins 412 on the left side of the armrest cover lower cover 51, the armrest cover 5 automatically flips to the left side with the two locking pins 412 on the left side of the armrest cover lower cover 51 as the fixed axis of rotation. At this time, due to the restrictions of the mis-opening limit block 62 and the maze structure 27, the button 21 on the left side of the armrest cover lower cover 51 cannot be pressed, and the locking pin 412 is always in the unlocked state. When the armrest cover 5 is closed, the armrest cover 5 will not collide with the locking pin 412.

[0183] After closing the armrest cover 5, the button 21 on the right side of the armrest cover lower cover 51 is pressed again, and the labyrinth locking member 231 slides into the second slideway 272 under the restriction of the position of the guide island 274 and the locking island 273. The button 21 is released, and the labyrinth locking member 231 returns to its original position under the action of the second reset elastic member 25. The mis-opening limit block 62 returns to its original position under the reset action of the first reset elastic member 63, so that the fixing column 61 is located at the end of the guide groove 624 away from the first guide slope 623. The pull rope 32 pulls the two locking pins at the front and rear ends on the right side to move forward and backward in the direction close to the armrest cover shaft body 52 and the base 11, so that the armrest cover shaft body 52 and the base 11 on the left side of the armrest cover lower cover 51 are locked.

[0184] Although the present invention has been described in detail above by means of general description, specific implementation methods and tests, it is obvious to those skilled in the art that some modifications or improvements may be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection claimed by the present invention.

Claims

1. A rollover handrail structure, characterized in that: include: A base (1) having two pedestals (11) at its front and rear ends; An armrest cover (5) located above the base (1) and capable of turning around the left or right side of the base (11), comprising an armrest cover lower cover (51), two armrest cover shafts (52) mounted at the front and rear ends of the armrest cover lower cover (51), and an armrest cover upper cover (23) located above the armrest cover lower cover (51) and fixedly connected to the two armrest cover shafts (52); Two groups of pin shaft assemblies (4) are arranged at the front and rear ends of the lower cover (51) of the armrest cover, each group of pin shaft assemblies (4) comprises two groups of pin shaft units (41) located at the left and right sides of the armrest cover shaft body (51), and each group of pin shaft units (41) comprises a pin shaft seat (411) and a locking pin shaft (412) that can move in the front and rear directions and lock or release the armrest cover shaft body (52) and the base (11); Two groups of starting components (2) are symmetrically distributed on the left and right sides of the lower cover (51) of the armrest cover, and each group of starting components (2) includes two moving blocks (22) that can move synchronously in the left and right directions; And four groups of fixed pulley assemblies (3) are arranged between each group of pin shaft units (41) and the moving block (22) and connected to each other in a transmission manner.

2. A rollover handrail structure according to claim 1, characterized in that: An erroneous opening limit assembly (6) is arranged between the two groups of the starting assemblies (2), and the erroneous opening limit assembly (6) is arranged so that when two moving blocks (22) located on the left or right side of the lower cover (7) move in the left-right direction until they abut against the erroneous opening limit assembly (6), the two moving blocks (22) on the other side are restricted from moving in the left-right direction.

3. A rollover handrail structure according to claim 2, characterized in that: The moving block (22) is divided into a left moving block (221) and a right moving block (222) which are arranged opposite to each other, and the left moving block (22) and the right moving block (222) are respectively provided with two pieces which are connected side by side as a whole; The mis-opening limiting assembly (6) comprises a mis-opening limiting block (62) having the freedom to move in the front-rear direction and located between the left moving block (221) and the right moving block (222); The two end corner regions of the mis-opening limit block (62) along the diagonal line are respectively provided with a first notch (621) and a second notch (622) facing the left moving block (221) and the right moving block (222); A first guiding inclined surface (623) facing the right moving block (22) is provided at an end angle region of the mis-opening limit block (62) opposite to the first notch (621), wherein one of the right moving blocks (222) has a second guiding inclined surface (2221) matching the first guiding inclined surface (623).

4. The rollover handrail structure according to claim 3, characterized in that: The mis-opening limit block (62) is configured as follows: When the left moving block (221) moves rightward until one of the left moving blocks (221) abuts against the first notch (621), the first guiding inclined surface (623) abuts against the right moving block (222) having the second guiding inclined surface (2221), and the right moving block (222) is restricted by the mis-opening limit block (62) and cannot move leftward; When the right moving block (222) moves to the left until the second guiding inclined surface (2221) of one of the right moving blocks (222) is in close contact with the first guiding inclined surface (623), and drives the erroneous opening limit block (62) to move in the front-back direction until the other right moving block (222) abuts against the second notch (622), one of the left moving blocks (221) abuts against the end angle area of ​​the erroneous opening limit block (62) opposite to the second notch (622), and the left moving block (221) is restricted by the erroneous opening limit block (62) and cannot move to the right.

5. The rollover handrail structure according to claim 4, characterized in that: The erroneous opening limit block (62) is provided with a guide groove (624) distributed in the front-rear direction. The erroneous opening limit assembly (6) further comprises a fixing column (61) fixed on the lower cover (51) of the armrest cover and slidably connected to the guide groove (624), a first fixing block (64) located on one side of the erroneous opening limit block (62), and a first reset elastic member (63) connecting the erroneous opening limit block (62) and the first fixing block (64).

6. The rollover handrail structure according to claim 1, characterized in that: Each group of the starting components (2) further includes: A button (21) located on the side of the lower cover (51) of the armrest cover; A connecting piece (23) connecting the button (21) and the two moving blocks (22), the upper surface of which is provided with a labyrinth locking piece (231); A second fixed block (24) disposed between the two moving blocks (22); and a second resetting elastic member (25) connecting the second fixing block (24) and the connecting member (23).

7. The rollover handrail structure according to claim 6, characterized in that: The rollover armrest structure further comprises a lower cover bracket (54) located between the armrest cover lower cover (51) and the armrest cover upper cover (53); The lower cover bracket (54) is provided with a button bracket (26) located above the connecting member (23), and the lower surface of the button bracket (26) is provided with a labyrinth structure (27) for the labyrinth locking member (231) to slide; The maze structure (27) is configured such that when the button (21) is pressed, the moving block (22) moves to the left or right to the farthest point; when the button (21) is pressed again, the moving block (22) returns to its original position.

8. The rollover handrail structure according to claim 7, characterized in that: The maze structure (27) comprises a first slideway (271), a second slideway (272), a locking island (273) and a guide island (274); the locking island (273) and the guide island (274) are located between the first slideway (271) and the second slideway (272); the guide island (274) is located at one end of the first slideway (271) and the second slideway (272); and the other ends of the first slideway (271) and the second slideway (272) are connected to each other; The labyrinth locking member (231) is a raised triangular structure.

9. The rollover handrail structure according to claim 1, characterized in that: Each fixed pulley assembly (3) comprises: A plurality of fixed pulleys (31) located between the moving block (22) and the locking pin shaft (412); and a pull rope (32) connecting the moving block (22) and the locking pin shaft (412) and winding around the surface of the fixed pulley (31).

10. The rollover handrail structure according to claim 9, characterized in that: The locking pin shaft (412) is provided with a torsion spring (413).

Images