Pulling mechanism, control mechanism and handrail

Abstract

The utility model relates to the field of automotive interiors, in particular to a pulling mechanism, a control mechanism and a handrail, which comprises a rotating part and a rotating seat fixed in a handrail shell, the rotating part is rotatably connected onto the rotating seat, one end of the rotating part is a pulling end connected with an inhaul cable connected onto an angle adjuster, and the other end of the rotating part is a pulling end connected with an inhaul cable connected onto the angle adjuster. The other end of the rotating part is a driving end driven by the button unlocking mechanism; and a torsional spring is connected between the rotating piece and the rotating seat. According to the scheme, a long-distance recliner control mode different from the prior art is designed, the recliner can be unlocked by holding the handrail, and operation is easy and convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automotive interior, concretely relates to a pulling mechanism, control mechanism and handrail. BACKGROUND

[0002] In the prior art, the automobile seat handrail is rotatably arranged on the side of the automobile seat, and an angle adjuster is connected between one end of the handrail rotatably connected to the automobile seat, so that the angle of the handrail can be adjusted by the angle adjuster. When the angle adjuster is in the locked state, the angle adjuster is locked on the rotating shaft of the handrail, and the handrail cannot rotate on the seat. When the adjuster is in the unlocked state, the angle adjuster can rotate on the rotating shaft of the handrail, and the handrail can rotate on the seat to realize angle and position adjustment.

[0003] For example, the patent with the authorization announcement number CN112248893B of Chinese invention patent discloses a kind of automobile seat side handrail, and the automobile seat side handrail includes angle adjuster, fastener, framework, buckle, zipper and buckle hand, when needing to be unlocked, buckle hand is buckled, and buckle hand pulls zipper, and zipper pulls pawl to make it separate from ratchet wheel to realize unlocking.

[0004] For another example, the patent with the publication number CN113771714A of Chinese invention patent discloses a kind of automobile and its application angle adjuster's automobile seat handrail, and the application angle adjuster's automobile seat handrail includes: handrail body, handrail pedestal and angle adjuster assembly;Handrail pedestal is used to be set in vehicle body or chair basin;Handrail body is rotatably installed in handrail pedestal by angle adjuster assembly;Unlocking handle is provided on angle adjuster, and by driving unlocking handle to move in unlocking direction, the unlocking of angle adjuster can be realized.

[0005] For the patent with the publication number CN113771714A of Chinese invention patent, how to drive unlocking handle is not specifically disclosed in the patent, since angle adjuster is located at the rear end of handrail, and driver sits on seat, hand is located at the front end of handrail, if hand is placed at the rear end of handrail and directly controls unlocking handle, the operation convenience is obviously poor.

[0006] For the patent with the authorization announcement number CN112248893B of Chinese invention patent, although it can control angle adjuster at a long distance by buckling buckle hand, when hand rotates handrail, hand holds handrail, and finger also needs to additionally pick buckle hand, which may be inconvenient and not handy, and as people's demand for diversified operation of automotive interior, people's control of angle adjuster is not limited to the way of controlling buckle hand, so it is necessary to explore and research other control methods of angle adjuster to meet the operation habits and needs of different people. UTILITY MODEL CONTENTS

[0007] The utility model intends to provide a pull mechanism, control mechanism and handrail, to design a different, long distance angle adjuster control mode from prior art, through holding the handrail, the angle adjuster can be unlocked.

[0008] In order to achieve the above object, the utility model adopts the following technical scheme: a pull mechanism, including rotating part and rotating seat for being fixed in handrail casing, rotating part is rotatably connected on rotating seat, one end of rotating part is pull end for being connected with pull cable connected on angle adjuster, the other end of rotating part is drive end driven by button unlocking mechanism, and torsional spring is connected between rotating part and rotating seat.

[0009] In order to achieve the above object, the utility model also adopts the following technical scheme: control mechanism, including button unlocking mechanism and the pull mechanism of the application,

[0010] The button unlocking mechanism includes button seat for being fixed in handrail casing, button for sliding on button seat and elastic member for resetting button, and the driving block for driving drive end is connected on button.

[0011] In order to achieve the above object, the utility model also adopts the following technical scheme: handrail, including handrail casing, angle adjuster and the control mechanism of the application,

[0012] The pull mechanism is placed in handrail casing, and the rotating seat is fixed in the interior of handrail casing.

[0013] The button unlocking mechanism is placed in handrail casing, and the pressing end of button is exposed on handrail casing.

[0014] The angle adjuster and drive end are connected with pull cable.

[0015] The principle and advantages of the application scheme are: when the angle of handrail is adjusted, the hand holds the handrail, and the finger can press on the pressing end of button, the button slides on button seat under the pressing of finger, the button drives the movement of driving block, the driving block drives the drive end of rotating part, so that the rotating part rotates on rotating seat, the pull end of rotating part swings, the pull end pulls the pull cable, the pull cable pulls the angle adjuster, so that the angle adjuster is unlocked, and the handrail can rotate on seat, realizing the adjustment of handrail angle.

[0016] When the angle of handrail is adjusted, the hand holds the handrail, and the finger can press on the pressing end of button, the button slides on button seat under the pressing of finger, the button drives the movement of driving block, the driving block drives the drive end of rotating part, so that the rotating part rotates on rotating seat, the pull end of rotating part swings, the pull end pulls the pull cable, the pull cable pulls the angle adjuster, so that the angle adjuster is unlocked, and the handrail can rotate on seat, realizing the adjustment of handrail angle.

[0017] The scheme has the following beneficial effects:

[0018] 1. The handrail in the application is unlocked by the cooperation of the button unlocking mechanism and the pulling mechanism. The button is pressed at the front end of the handrail or the middle section of the handrail. The button unlocking mechanism drives the pulling mechanism to operate. The pulling mechanism pulls the cable. The cable pulls the angle adjuster to unlock the angle adjuster, thereby realizing the remote control of the angle adjuster. The hand does not need to be placed at the rear end of the handrail to control the angle adjuster, thereby improving the convenience of the angle adjuster adjustment.

[0019] 2. The application discloses a control mode for unlocking the angle adjuster by pressing. When the angle adjuster needs to be unlocked, the user only needs to press the button. Compared with the existing technology, the button is pressed to control the unlocking of the angle adjuster. There is an additional unlocking operation mode for the angle adjuster, which makes the unlocking mode of the angle adjuster more diversified and can meet the operation habits and needs of different people.

[0020] 3. When the handrail is adjusted, the hand is held on the handrail. The hand holds the handrail while the fingers act on the button to press the button, thereby realizing the unlocking of the angle adjuster. Then the hand can rotate the handrail. Compared with the existing technology, the button is pressed to control the unlocking of the angle adjuster. The operation is more convenient and convenient.

[0021] Preferably, as an improvement to the pulling mechanism, a limiting pressure piece is arranged on the side of the rotating piece away from the rotating seat. The limiting pressure piece and the rotating seat are connected by a fixing piece.

[0022] Therefore, the fixing piece fixes the limiting pressure piece on the rotating seat, and the limiting pressure piece presses the rotating piece on the rotating seat, thereby fixing the rotating piece on the rotating seat and preventing the rotating piece from being separated from the rotating seat during rotation.

[0023] Preferably, as an improvement to the pulling mechanism, a circular placement groove is arranged on the side face of the rotating piece away from the rotating seat, and the limiting pressure piece is arranged in the placement groove. A seat hole is arranged on the rotating piece, and the end portion of the rotating seat is inserted into the seat hole. The rotating seat and the rotating piece are rotationally connected through the cooperation of the seat hole and the end portion of the rotating seat. The fixing piece passes through the seat hole and is connected with the rotating seat.

[0024] Therefore, the placement groove plays a role in accommodating the limiting pressure piece. When the limiting pressure piece and the rotating piece are assembled, the placement groove plays a role in positioning the limiting pressure piece. The fixing piece passes through the seat hole and is connected with the rotating seat, and the fixing piece does not affect the rotation of the rotating piece.

[0025] Preferably, as an improvement to the pulling mechanism, the rotating piece is gap-fitted between the limiting pressure piece and the rotating seat.

[0026] The gap fit in the scheme is conducive to reducing the friction between the rotating member and the rotating seat, the rotating member and the limiting pressure piece, and making the rotating member rotate more smoothly on the rotating seat.

[0027] Preferably, as an improvement to the pulling mechanism, the gap between the pressing surface of the limiting pressure piece and the pressed surface of the rotating member is 0.05-0.1 mm; the gap between the pressing surface of the rotating member and the pressed surface of the rotating seat is 0.05-0.1 mm.

[0028] Preferably, as an improvement to the pulling mechanism, the pulling end is provided with a circular fixing groove and an L-shaped wire groove, and the wire groove and the fixing groove are communicated.

[0029] Thus, the fixing groove is used for placing the cylindrical clamping block at the end of the cable, thereby realizing the connection between the pulling end and the cable; the L-shaped wire groove enables the cable wire to enter the wire groove during the process of placing the clamping block into the fixing groove, and the side wall of the rotating member does not hinder the wire, thereby not affecting the normal placement of the clamping block in the fixing groove. Since the wire groove is L-shaped, the clamping block can rotate in the fixing groove after being placed in the fixing groove, and the cable wire can also move in the wire groove, so that the cable wire moves from one side of the L-shaped wire groove to the other side of the L-shaped wire groove, the cable wire is clamped in the wire groove, the inner wall of the wire groove limits the cable wire, and the clamping block is not easy to be axially separated from the fixing groove.

[0030] Preferably, as an improvement to the button unlocking mechanism, the button seat is provided with a slot, the button is inserted into the slot, the side surface of the button seat is provided with a through hole, the through hole and the slot are communicated, the driving block is located outside the button seat and slides, and the connection component passing through the through hole is arranged between the driving block and the button.

[0031] Thus, the button can slide in the slot by being inserted into the slot, thereby realizing the sliding connection between the button and the button seat, and the button is inserted into the button seat, which is more compact and saves space compared with arranging the button outside the button seat. The through hole enables the slot inside the button seat to be communicated with the outside of the button seat, the driving block is located outside the button seat, and the connection component passing through the through hole can connect the driving block and the button.

[0032] Preferably, as an improvement to the button unlocking mechanism, the inner wall of the slot is provided with a sliding groove, and the side wall of the button is provided with a sliding part located in the sliding groove. Thus, the sliding part cooperates with the sliding groove to realize the sliding of the button in the slot, so that the button in the slot can only need the side surface of the sliding part to be in contact with the inner wall of the sliding groove, and the other side wall of the button can not be in contact with the inner wall of the slot, which is conducive to reducing the contact area between the button and the inner wall of the slot of the button seat, thereby reducing the friction between the button and the button seat and saving the labor of the finger pressing the button. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a perspective view of the handrail.

[0034] Figure 2 is a perspective view of the handrail. Figure 1 is a top view of the handrail (the handrail does not include the cover in the figure).

[0035] Figure 3 is a perspective view of the handrail. Figure 2 is a sectional view of A-A in the handrail.

[0036] Figure 4 is a perspective view of the control mechanism, the pull cable and the angle adjuster in the handrail shell.

[0037] Figure 5 is a perspective view of the handrail seat, mainly showing the rotating seat in the handrail seat.

[0038] Figure 6 is a perspective view of the control mechanism.

[0039] Figure 7 is a perspective view of the control mechanism, mainly showing the structure of the button unlocking mechanism.

[0040] Figure 8 is a perspective view of the control mechanism, mainly showing the structure of the pulling mechanism. DETAILED DESCRIPTION

[0041] The following will be further described in detail through specific embodiments:

[0042] The reference signs in the drawings of the specification include: cover 1, handrail seat 2, button 3, rotating seat 4, torsional spring 5, rotating part 6, limiting pressing part 7, fixing part 8, rotating shaft 9, fixing groove 10, wire groove 11, clamping block 12, end part 13, screw hole 14, screw column 15, button seat 16, fixing column 17, elastic part 18, driving block 19, driving end 20, clamping block 21, sliding part 22, sliding groove 23, fixing screw 24, pull cable 25, angle adjuster 26, first pressing surface 27, placing groove 28, unlocking handle 29.

[0043] The embodiments are basically as shown in the drawings. Figures 1-8

[0044] ​The embodiment discloses a handrail, which comprises a handrail shell, an angle adjuster 26 and a control mechanism. The handrail shell comprises a handrail base 2 and a cover body 1 which is clamped on the top of the handrail base 2, and the inside of the handrail shell is provided with a space, the control mechanism and the angle adjuster 26 are both installed in the handrail shell, the angle adjuster 26 is installed at the rear end of the handrail shell, the rear end of the handrail shell is connected with a car seat through a rotating shaft 9, the rotating shaft 9 and the car seat are fixed, the rotating shaft 9 and the angle adjuster 26 are rotationally connected, when the angle adjuster 26 is locked, the angle adjuster 26 and the rotating shaft 9 are locked together, the handrail cannot rotate on the seat, when the angle adjuster 26 is unlocked, the angle adjuster 26 can rotate relative to the rotating shaft 9, and the handrail can rotate around the rotating shaft 9 on the seat. The angle adjuster 26 in the application is not the improvement of the patent, the angle adjuster 26 is relatively mature, and is relatively common on the seat, therefore, the structure and principle of the angle adjuster 26 are not specifically described in the embodiment, and the angle adjuster 26 adopts an existing angle adjuster 26 structure, for example, the angle adjusters disclosed in the two existing patents in the background art.

[0045] Compared with the prior art, the main improvement of the embodiment is the structure of the control mechanism. The control mechanism in the embodiment comprises a button unlocking mechanism and a pulling mechanism.

[0046] As shown in Figure 4 , Figures 6-8 , the button unlocking mechanism in the embodiment comprises a button seat 16 (as shown in Figure 5 , the specific fixing manner of the button seat 16 in the handrail shell is that the inside of the handrail base 2 is provided with a screw column 15, and the button seat 16 is fixed on the screw column 15 through a screw), a button 3 which is slidably arranged on the button seat 16, and an elastic piece 18 which is used for resetting the button 3, and the button 3 is connected with a driving block 19.

[0047] The specific sliding manner of the button 3 and the button seat 16 is that, as shown in Figure 7 , the button seat 16 is provided with a slot for inserting the button 3, the button 3 is inserted into the slot, the side surface of the button seat 16 is provided with a through hole which is communicated with the slot, the driving block 19 is slidably arranged on the outside of the button seat 16, a connecting component which passes through the through hole is arranged between the driving block 19 and the button 3, and the connecting component in the embodiment comprises a clamping block 21 which is integrally formed on the button 3, the button 3 is assembled in the slot, the clamping block 21 is located in the through hole, the side surface of the driving block 19 is provided with a clamping hole which is matched with the clamping block 21, so that the driving block 19 is arranged on the side surface of the button seat 16, the clamping block 21 is clamped into the clamping hole, and the driving block 19 is fixed on the clamping block 21 through a fixing screw 24. In this way, the movement of the button 3 can drive the movement of the driving block 19.

[0048] In other embodiments, in order to reduce the sliding friction between the outer side wall of the button 3 and the inner wall of the slot, the inner wall of the slot is provided with a strip-shaped sliding groove 23, and the button 3 is integrally provided with a sliding part 22 (the sliding part 22 is strip-shaped) on the side wall, and the sliding part 22 is located in the sliding groove 23, so that when the button 3 is in the slot, the sliding part 22 slides in the sliding groove 23, thereby realizing the sliding of the button 3 in the button seat 16. When the sliding part 22 and the sliding groove 23 are used to realize the sliding of the button 3 on the button seat 16, in addition to the side surface of the sliding part 22 and the inner wall of the sliding groove 23 being in contact, there is a gap between the outer side wall of the button 3 and the inner wall of the slot, so that the entire outer side wall of the button 3 is not in close contact with the inner wall of the slot, and only the side wall of the sliding part 22 is in contact with the inner wall of the sliding groove 23, which is beneficial to reduce the contact friction area between the button 3 and the inner wall of the slot, thereby reducing the sliding resistance, and the button 3 slides more smoothly in the slot.

[0049] The elastic member 18 in the embodiment is a compression spring, the bottom end of the slot is integrally provided with a fixed column 17, one end of the elastic member 18 is sleeved on the fixed column 17, and one end of the button 3 located in the slot is provided with a fixed hole. The other end of the elastic member 18 is located in the fixed hole, so that after the button 3 is pressed, the button 3 extrudes the elastic member 18, the elastic member 18 stores energy, and after the button 3 is released, the button 3 can be reset under the action of the elastic member 18.

[0050] In combination Figure 1 As shown in the figure, the pressing end of the button 3 is exposed outside the handrail seat 2.

[0051] The pulling mechanism in the embodiment is arranged in the handrail shell. The pulling mechanism includes a rotating member 6 and a rotating seat 4 for being fixed in the handrail shell. Figure 2 and Figure 5 As shown in the figure, the rotating seat 4 is integrally formed in the inside of the handrail seat 2.

[0052] The rotating member 6 is rotationally connected to the rotating seat 4. Specifically, the end 13 of the rotating seat 4 is circular, the center part of the end 13 of the rotating seat 4 is provided with a screw hole 14, and the rotating member 6 is provided with a seat hole which is circular in shape. The end 13 of the rotating seat 4 is inserted into the seat hole, and the end 13 of the rotating seat 4 and the seat hole are rotationally matched. Figure 3 and Figure 8 As shown in the figure, the side of the rotating member 6 away from the rotating seat 4 is provided with a limiting pressing member 7, the side surface of the rotating member 6 away from the rotating seat 4 is provided with a circular placement groove 28, the limiting pressing member 7 is circular, the limiting pressing member 7 is placed in the placement groove 28, and the limiting pressing member 7 and the rotating seat 4 are connected with a fixing member 8. The fixing member 8 is specifically a screw, and the fixing member 8 is connected to Figure 5The limiting press 7 limits the rotation piece 6, and the rotation piece 6 will not fall off the rotation seat 4 when the rotation piece 6 rotates on the rotation seat 4.

[0053] In order to make the rotation piece 6 rotate smoothly on the rotation seat 4, the rotation piece 6 and the rotation seat 4 in the embodiment are clearance fit, and specifically, the rotation piece 6 and the rotation seat 4 are clearance fit as shown in Figure 5 The rotation seat 4 is provided with a first press surface 27, and the rotation piece 6 is arranged on the rotation seat 4, and the side surface of the rotation piece 6 opposite to the first press surface 27 is a first press surface, and the clearance between the first press surface and the first press surface 27 is 0.05-0.1mm; the rotation piece 6 and the limiting press 7 in the embodiment are clearance fit, and specifically, the bottom surface of the placing groove 28 is a second press surface, and the side surface of the limiting press 7 facing the bottom surface of the placing groove 28 is a second press surface, and the clearance between the second press surface and the second press surface is 0.05-0.1mm. Thus, the above clearance fit is arranged, the limiting press 7 will not press the rotation piece 6 to death, and the rotation piece 6 and the first press surface 27, the rotation piece 6 and the limiting press 7 have small friction when the rotation piece 6 rotates on the rotation seat 4, which is beneficial to improve the rotation smoothness of the rotation piece 6.

[0054] In combination with Figure 6 As shown in the figure, one end of the rotation piece 6 is a driving end 20, and the driving end 20 abuts against the driving block 19. In combination with Figure 8 As shown in the figure, the other end of the rotation piece 6 is a pulling end for connecting with the inhaul cable 25 connected to the angle adjuster 26. The specific connection mode of the inhaul cable 25 and the pulling end is that the pulling end is provided with a circular fixing groove 10 and an L-shaped wire groove 11, the wire groove 11 is located at the side surface of the fixing groove 10, one side of the L-shaped wire groove 11 is in the same direction as the axis direction of the fixing groove 10, and the wire groove 11 and the fixing groove 10 are communicated. A cylindrical clamping block 12 is fixed on the wire of the inhaul cable 25, the clamping block 12 is inserted into the fixing groove 10, and the wire of the inhaul cable 25 is inserted into the wire groove 11 (specifically, the wire is inserted into one side of the L-shaped wire groove 11 in the same direction as the fixing groove 10). Since the wire groove 11 is L-shaped, after the clamping block 12 is placed in the fixing groove 10, the clamping block 12 can rotate in the fixing groove 10, and the wire of the inhaul cable 25 can also move in the wire groove 11, so that the wire of the inhaul cable 25 moves from one side of the L-shaped wire groove 11 to the other side of the L-shaped wire groove 11, the wire of the inhaul cable 25 is clamped in the inner wall of the wire groove 11, and the clamping block 12 is not easy to be axially separated from the fixing groove 10.

[0055] The torsion spring 5 is connected between the rotation piece 6 and the rotation seat 4.

[0056] In combination with Figure 4 As shown in the figure, the angle adjuster 26 is provided with an unlocking handle 29, and the unlocking handle 29 is connected to the end of the inhaul cable 25 away from the rotation piece 6.

[0057] The specific implementation process is as follows: when the angle of the armrest is adjusted, the hand holds the armrest, and the fingers can press on the pressing end 13 of the button 3, the button 3 slides on the button seat 16 under the pressing action of the fingers, the button 3 extrudes the elastic piece 18, the button 3 drives the driving block 19 to move, the driving block 19 drives the driving end 20 of the rotating piece 6, so that the rotating piece 6 rotates on the rotating seat 4, the torsional spring 5 is energized, the pulling end of the rotating piece 6 swings, the pulling end pulls the cable 25, the cable 25 pulls the unlocking handle 29 on the angle adjuster 26, so that the angle adjuster 26 is unlocked, and at the same time the hand pushes the armrest to swing on the car seat, the armrest can rotate on the seat, and the adjustment of the angle of the armrest is realized.

[0058] When the angle adjustment of the armrest is completed, the armrest is released, the button 3 is no longer pressed by the hand, the elastic piece 18 resets the button 3, the button 3 reversely slides on the button seat 16, the driving block 19 reversely moves, and at the same time the rotating piece 6 reversely rotates and resets under the elastic force of the torsional spring 5, the pulling end of the rotating piece 6 no longer pulls the cable 25, the cable 25 no longer pulls the angle adjuster 26, and the angle adjuster 26 restores the locking state, so that the armrest is locked on the seat, the angle of the armrest is fixed, and the armrest cannot rotate on the seat at will.

[0059] The above is only an embodiment of the present application, and the specific technical solutions and / or common knowledge of the scheme are not described in detail. It should be noted that for those skilled in the art, without departing from the technical scheme of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. A pull mechanism characterized by: The rotating member is rotatably connected to the rotating seat, one end of the rotating member is a pulling end for connecting to a pulling cable of an angle adjuster, the other end of the rotating member is a driving end driven by a button unlocking mechanism, and a torsion spring is connected between the rotating member and the rotating seat.

2. A puller mechanism according to claim 1, wherein: The side of the rotating member away from the rotating seat is provided with a limiting pressing member, and a fixing member is connected between the limiting pressing member and the rotating seat.

3. A puller mechanism according to claim 2, wherein: The side of the rotating member away from the rotating seat is provided with a circular placement groove, the limiting pressing member is placed in the placement groove, the rotating member is provided with a seat hole, the end of the rotating seat is inserted into the seat hole, and the rotating connection between the rotating seat and the rotating member is realized by the cooperation of the seat hole and the end of the rotating seat, and the fixing member passes through the seat hole and is connected with the rotating seat.

4. A puller mechanism according to claim 2, wherein: The rotating member is clearance fit between the limiting pressing member and the rotating seat.

5. A puller mechanism according to claim 4, wherein: The gap between the pressing surface of the limiting pressing member and the pressed surface of the rotating member is 0.05-0.1 mm, and the gap between the pressing surface of the rotating member and the pressed surface of the rotating seat is 0.05-0.1 mm.

6. A puller mechanism according to claim 1, wherein: The pulling end is provided with a circular fixing groove and an L-shaped wire groove, and the wire groove and the fixing groove are communicated.

7. Control mechanism, characterized in that The button unlocking mechanism and the pulling mechanism of any one of claims 1-6 are included. The button unlocking mechanism includes a button seat fixed in the armrest shell, a button sliding on the button seat, and an elastic member for resetting the button, and the button is connected with a driving block for driving the driving end.

8. The control mechanism of claim 7, wherein: The button seat is provided with an insertion groove, the button is inserted into the insertion groove, the side surface of the button seat is provided with a through hole, the through hole and the insertion groove are communicated, the driving block is sliding on the outside of the button seat, and a connecting part passing through the through hole is arranged between the driving block and the button.

9. The control mechanism of claim 8, wherein: The inner wall of the insertion groove is provided with a sliding groove, and the side wall of the button is provided with a sliding part located in the sliding groove.

10. A handrail characterised by: The armrest shell, the angle adjuster, and the control mechanism of any one of claims 7-9 are included. The pulling mechanism is arranged in the armrest shell, and the rotating seat is fixed in the armrest shell. The button unlocking mechanism is arranged in the armrest shell, and the pressing end of the button is exposed from the armrest shell. The angle adjuster and the driving end are connected by a pulling cable.

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