A handrail rotation positioning mechanism

Abstract

This utility model discloses a handrail rotation positioning mechanism, including a handrail base, a handrail, and a rotating shaft. The handrail can rotate horizontally around the rotating shaft. A positioning block is set on one side of the rotating shaft, and a linear drive module is connected to the other side, which can push the positioning block closer to / away from the rotating shaft to achieve locking and unlocking. The rotating shaft is fixed to the handrail base, and the handrail has a matching rotating groove. The linear drive module includes a nut and a screw; rotating the nut can drive the positioning block to press against or move away from the rotating shaft. A spring connects the screw and the positioning block to avoid rigid contact wear. A tactile feedback module is also provided, including a toothed ring and a paddle with meshing teeth. The paddle is connected to the handrail via an elastic support member, providing a tactile feedback during rotation. This utility model provides stable locking, convenient operation, improved user experience, and extended service life.

Description

Technical Field

[0001] This utility model relates to the field of furniture manufacturing technology, specifically to a handrail rotation positioning mechanism. Background Technology

[0002] Armrests are an important component of chairs (such as gaming chairs, office chairs, and reflex chairs), and their angle adjustability directly affects user comfort. Existing armrest rotation and positioning mechanisms generally suffer from the following problems:

[0003] Existing technologies mostly use friction plates or simple buckle structures to lock the angle of the handrail. After long-term use, the lock is prone to loosening due to wear and tear, making it impossible to maintain a fixed angle and affecting the user's operating comfort.

[0004] Traditional adjustment mechanisms require two-hand operation, such as simultaneously rotating the knob and holding the armrest, and lack clear feedback during the adjustment process, making it difficult for users to quickly locate the target angle, thus affecting the user experience;

[0005] Rigid contact positioning methods are prone to wear on the surface of the rotating shaft, especially after frequent adjustments, resulting in a significant decrease in positioning accuracy and the need for frequent component replacement. Utility Model Content

[0006] The purpose of this invention is to provide a handrail rotation positioning mechanism to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a handrail rotation positioning mechanism, comprising a handrail base and a handrail rotatably mounted on one side of the top of the handrail base along its length via a rotating shaft. The handrail can rotate horizontally relative to the handrail base around the rotating shaft. A positioning block for fixing the rotating shaft is provided on one side of the rotating shaft. A linear drive module for pushing the positioning block to move closer to or further away from the rotating shaft is provided on one side of the positioning block, thereby realizing the locking and unlocking of the handrail.

[0008] Furthermore, the rotating shaft is fixed to the top of the armrest seat, and the interior of the armrest is provided with a rotating groove that is compatible with the rotating shaft.

[0009] Furthermore, the linear drive module includes a nut rotatably connected to the handrail and a screw threaded at the center of the nut. The bottom end of the nut extends to the outside of the handrail. Rotating the nut causes the screw and positioning block to move closer to the rotating shaft to press the rotating shaft and achieve locking, or causes the screw and positioning block to move away from the rotating shaft to achieve unlocking.

[0010] Furthermore, the screw and the positioning block are connected by a spring, which provides a buffering force to prevent the positioning block from rigidly contacting the rotating shaft and causing wear.

[0011] Furthermore, it also includes a haptic feedback module.

[0012] Furthermore, the haptic feedback module includes a gear ring integrally fixed on the outer peripheral wall of the rotating shaft and a paddle disposed on one side of the gear ring. The paddle is provided with meshing teeth that are adapted to the gear ring on the side near the gear ring, and an elastic support is provided on the side of the paddle away from the gear ring. Under the elastic support of the elastic support, the paddle can move elastically back and forth along the radial direction of the gear ring when the armrest is rotated.

[0013] Furthermore, the elastic support is an integrally fixed figure-eight structure on the paddle. The inside of the armrest is provided with a mounting groove that matches the paddle and the elastic support. The mounting groove is used to limit the paddle to move back and forth only along the radial direction of the rotation axis. The end of the elastic support away from the paddle abuts against the inner wall of the mounting groove to push the paddle and the gear ring to mesh with each other.

[0014] Furthermore, the gear ring is integrally fixed to the outer peripheral wall of the rotating shaft along the axial direction of the rotating shaft, and an arc-shaped smooth section is cut on the outer peripheral wall of the rotating shaft near the end of the positioning block. The arc-shaped smooth section is used to allow the handrail to rotate freely relative to the rotating shaft when the positioning block is unlocked.

[0015] Furthermore, the side of the positioning block closest to the rotating shaft has an arc-shaped structure that matches the smooth arc section of the rotating shaft, which increases the contact area between the positioning block and the rotating shaft and improves locking stability.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] (1) The handrail rotation positioning mechanism uses a friction locking structure between the positioning block and the rotating shaft, and provides controllable clamping force through a linear drive module, avoiding the loosening problem caused by wear of traditional friction plates, and the locking force is more stable and durable.

[0018] (2) The nut is placed under the armrest. The nut can be rotated while the armrest is rotated to lock and unlock the rotating shaft. Adjustment can be completed with one hand, which is convenient to use. The tactile feedback module provides a clear gear feel through the meshing of the toothed ring and the paddle. Users can quickly locate the target angle through touch.

[0019] (3) The spring buffer design of the positioning block absorbs the impact force during the adjustment process and reduces component wear. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the internal structure of the handrail of this utility model;

[0022] Figure 3 This is a partial cross-sectional view of the handrail structure of this utility model;

[0023] Figure 4 This is a first three-dimensional structural diagram of the haptic feedback module of this utility model;

[0024] Figure 5 This is a schematic diagram of the second three-dimensional structure of the tactile feedback module of this utility model.

[0025] In the diagram: 1. Armrest base; 2. Armrest; 21. Mounting slot; 3. Rotating shaft; 4. Positioning block; 41. Blind hole; 5. Linear drive module; 51. Screw; 52. Nut; 53. Spring; 6. Haptic feedback module; 61. Gear ring; 62. Paddle; 63. Elastic support component. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. In the description of the present utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in the present utility model based on the specific circumstances. Furthermore, in the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present utility model.

[0027] Please see Figure 1-5 The present invention provides an embodiment of a handrail rotation positioning mechanism, comprising a handrail base 1 and a handrail 2 rotatably mounted on one side of the top of the handrail base 1 along its length via a rotating shaft 3. The handrail 2 can rotate horizontally relative to the handrail base 1 around the rotating shaft 3. A positioning block 4 for fixing the rotating shaft 3 is provided on one side of the rotating shaft 3. A linear drive module 5 for pushing the positioning block 4 to move closer to or further away from the rotating shaft 3 is provided on one side of the positioning block 4, thereby realizing the locking and unlocking of the handrail 2.

[0028] In this embodiment, the rotating shaft 3 is fixed to the top of the armrest seat 1 by bolts, such as... Figure 5The armrest 2 has a matching insert and slot at the end opposite to the armrest seat 1. After the insert is inserted into the slot, it is circumferentially fixed, and then the two are axially fixed by bolts. The armrest 2 has a rotating groove that matches the rotating shaft 3. The positioning block 4 and the linear drive module 5 are both located inside the armrest 2. During use, the rotating shaft 3 is fixed relative to the armrest seat 1, and the positioning block 4 and the linear drive module 5 are fixed relative to the armrest 2. After the angle of the armrest 2 is adjusted by rotating it, the linear drive module 5 pushes the positioning block 4 to move closer to the rotating shaft 3, and the rotating shaft 3 is pressed together to achieve the relative fixation of the armrest 2 and the armrest seat 1.

[0029] like Figure 3 In this embodiment, the linear drive module 5 includes a nut 52 rotatably connected to the handrail 2 and a screw 51 threaded at the center of the nut 52. The bottom end of the nut 52 extends to the outside of the handrail 2 for manually rotating the nut 52. This rotates the screw 51 and the positioning block 4 towards the side closer to the rotating shaft 3 to press the rotating shaft 3 and achieve locking, or moves the screw 51 and the positioning block 4 away from the rotating shaft 3 to achieve unlocking. Figure 2 The nut 52 is specifically clamped and positioned by four fixing blocks. The screw 51 is arranged radially along the rotation axis 3. By manually rotating the nut 52 exposed at the bottom of the handrail 2, the screw 51 can be moved back and forth radially along the rotation axis 3, which in turn moves the positioning block 4 back and forth radially along the rotation axis 3. In this embodiment, the screw 51 and the positioning block 4 are connected by a spring 53, specifically as follows: Figure 3 A blind hole 41 is provided on the side of the positioning block 4 near the screw 51. A fixing rod for limiting the spring 53 is provided on the inner wall of the blind hole 41 and the opposite side of the screw 51. The spring 53 is used to provide buffer force to avoid rigid contact between the positioning block 4 and the rotating shaft 3, which would cause wear and extend the service life of the rotating shaft 3 and the positioning block 4.

[0030] To provide a clear feel for the adjustment levels, this mechanism also includes a haptic feedback module 6. For example... Figure 4-5The haptic feedback module 6 includes a gear ring 61 integrally fixed to the outer peripheral wall of the rotating shaft 3 and a paddle 62 disposed on one side of the gear ring 61. The paddle 62 has meshing teeth that fit the gear ring 61 on the side closest to it, and an elastic support member 63 on the side furthest from the gear ring 61. Under the elastic support of the elastic support member 63, the paddle 62 can elastically reciprocate along the radial direction of the gear ring 61 when the armrest 2 is rotated. When the armrest 2 is rotated, the meshing teeth of the paddle 62 slide along the tooth surface of the gear ring 61 under the elastic support, producing a slight clicking sensation and sound each time it passes a tooth groove, forming a uniform adjustment range to help the user quickly locate the target angle. Simultaneously, the outer diameter of the gear ring 61 is larger than the outer diameter of the rotating shaft 3, and the positioning block 4 is always located below the gear ring 61, which can play a limiting role, that is, limiting the armrest 2 above the armrest seat 1 to prevent separation.

[0031] In this embodiment, the elastic support 63 is an integrally fixed "V"-shaped structure on the paddle 62, with an included angle of 60-120°. The armrest 2 has an internal mounting groove 21 that matches the paddle 62 and the elastic support 63. The mounting groove 21 limits the paddle 62 to moving back and forth only radially along the rotation axis 3. The end of the elastic support 63 away from the paddle 62 abuts against the inner wall of the mounting groove 21, which pushes the paddle 62 to engage with the gear ring 61. Alternatively, the elastic support 63 can be a coil spring.

[0032] like Figure 4-5 The gear ring 61 is integrally fixed on the outer peripheral wall of the rotating shaft 3 along the axial direction of the rotating shaft 3. The outer peripheral wall of the rotating shaft 3 near the positioning block 4 is cut with an arc-shaped smooth section. The arc-shaped smooth section is used to allow the handrail 2 to rotate freely relative to the rotating shaft 3 when the positioning block 4 is unlocked. The gear ends at both ends of the arc-shaped smooth section can play a mechanical limiting role, limiting the rotating shaft 3 to rotate only around the arc-shaped smooth section.

[0033] In this embodiment, the side of the positioning block 4 closest to the rotating shaft 3 is an arc-shaped structure that matches the arc-shaped smooth section of the rotating shaft 3, which is used to increase the contact area between the positioning block 4 and the rotating shaft 3 and improve the locking stability.

[0034] As an alternative implementation, the rotating shaft 3 can also be fixedly connected to the handrail 2. In this case, the handrail base 1 is provided with a rotating groove that matches the rotating shaft 3. The positioning block 4 and the linear drive module 5 are installed in the handrail base 1, which can also achieve the fixation of the handrail 2 after rotation. Its working principle is similar to that of this embodiment, and will not be described in detail here.

[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A handrail rotation positioning mechanism, comprising a handrail base (1) and a handrail (2) rotatably mounted on one side of the top end of the handrail base (1) along a length direction via a rotation axis (3), wherein the handrail (2) is rotatable relative to the handrail base (1) about the rotation axis (3), characterized in that: A positioning block (4) for fixing the rotating shaft (3) is provided on one side. A linear drive module (5) for pushing the positioning block (4) to move closer to or further away from the rotating shaft (3) is provided on one side, so as to realize the locking and unlocking of the handrail (2).

2. The handrail rotation positioning mechanism according to claim 1, characterized in that: The rotating shaft (3) is fixed to the top of the armrest seat (1), and the armrest (2) has a rotating groove inside that is adapted to the rotating shaft (3).

3. The handrail rotation positioning mechanism according to claim 2, characterized in that: The linear drive module (5) includes a nut (52) rotatably connected to the handrail (2) and a screw (51) threaded at the center of the nut (52). The bottom end of the nut (52) extends to the outside of the handrail (2). Rotating the nut (52) causes the screw (51) and the positioning block (4) to move closer to the rotating shaft (3) to press the rotating shaft (3) and achieve locking, or causes the screw (51) and the positioning block (4) to move away from the rotating shaft (3) to achieve unlocking of the rotating shaft (3).

4. The handrail rotation positioning mechanism according to claim 3, characterized in that: The screw (51) and the positioning block (4) are connected by a spring (53), which provides a buffer force to prevent the positioning block (4) from rigidly contacting the rotating shaft (3) and causing wear.

5. The handrail rotation positioning mechanism according to claim 1, characterized in that: It also includes a haptic feedback module (6).

6. The handrail rotation positioning mechanism according to claim 5, characterized in that: The tactile feedback module (6) includes a gear ring (61) integrally fixed on the outer peripheral wall of the rotating shaft (3) and a paddle (62) disposed on one side of the gear ring (61). The paddle (62) has meshing teeth that are adapted to the gear ring (61) on the side close to the gear ring (61), and an elastic support member (63) is disposed on the side of the paddle (62) away from the gear ring (61). Under the elastic support of the elastic support member (63), the paddle (62) can move elastically back and forth along the radial direction of the gear ring (61) when the armrest (2) is rotated.

7. The handrail rotation positioning mechanism according to claim 6, characterized in that: The elastic support (63) is an integrally fixed "eight" shaped structure on the paddle (62). The inside of the armrest (2) is provided with a mounting groove (21) that is compatible with the paddle (62) and the elastic support (63). The mounting groove (21) is used to limit the paddle (62) to move back and forth only along the radial direction of the rotation axis (3). The end of the elastic support (63) away from the paddle (62) abuts against the inner side wall of the mounting groove (21) to push the paddle (62) to mesh with the gear ring (61).

8. The handrail rotation positioning mechanism according to claim 6, characterized in that: The gear ring (61) is integrally fixed on the outer peripheral wall of the rotating shaft (3) along the axial direction of the rotating shaft (3), and an arc-shaped smooth section is cut on the outer peripheral wall of the rotating shaft (3) near the positioning block (4) in the axial direction. The arc-shaped smooth section is used to allow the handrail (2) to rotate freely relative to the rotating shaft (3) when the positioning block (4) is unlocked.

9. A handrail rotation positioning mechanism according to claim 8, characterized in that: The positioning block (4) has an arc-shaped structure on the side near the rotating shaft (3) that is adapted to the arc-shaped smooth section of the rotating shaft (3), which is used to increase the contact area between the positioning block (4) and the rotating shaft (3) and improve the locking stability.

Images