Angle adjustment mechanism and walking aid

Abstract

The utility model discloses an angle adjusting mechanism and walking aid, angle adjusting mechanism includes the first support and second support of rotation connection, and the front fork and handle riser pipe are rotated and are connected through the first support and second support, and the first support is opened with a plurality of first locking hole around the rotation axis of itself, and the second support is opened with second locking hole, locking mechanism is movably arranged on the second support, including locking piece and drive assembly, and locking piece switches under the drive of drive assembly between first locking position and first unlocking position, when locking piece is in first locking position, locking piece restricts the rotation of first support relative to second support, when locking piece is in first unlocking position, and first support can rotate relative to second support. Angle adjusting mechanism and walking aid aim at solving how to improve the reliability of angle adjusting mechanism technical problem.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an angle adjustment mechanism and a walking aid. Background Technology

[0002] In the design of walking aid steering systems, steering wheel tilt adjustment generally relies on a static mechanical structure: this structure consists of a handlebar seat and a fork, with the steering seat rotatably connected to the fork and secured by two sets of horizontal clamping bolts along the axis of rotation. To adjust the tilt, the vehicle must be stopped first. A hex wrench is used to loosen the horizontal clamping bolts, the handlebar seat is manually rotated to the target angle, and then the horizontal clamping bolts are tightened with a wrench or screwdriver. The tightening torque is then repeatedly calibrated to ensure no wobble. However, this connection method has an inherent flaw—the bolt holes and tapered interfaces are prone to plastic deformation after repeated disassembly and assembly, leading to a decrease in preload and potential loosening. Therefore, a highly reliable tilt adjustment mechanism is urgently needed. Utility Model Content

[0003] One objective of this invention is to provide an angle adjustment mechanism and a walking aid, which aims to solve the technical problem of how to improve the reliability of the angle adjustment mechanism.

[0004] To achieve the above objectives, in a first aspect, the present invention provides an angle adjustment mechanism comprising: a first support and a second support rotatably connected; the first support having a plurality of first locking holes around its own rotation axis, and the second support having a second locking hole; the first support rotating relative to the second support such that the second locking hole aligns with different first locking holes for adjusting the angle between the first support and the second support; and a locking mechanism movably disposed on the second support, comprising a locking member and a driving assembly; the locking member switching between a first locked position and a first unlocked position under the drive of the driving assembly; when the locking member is in the first locked position, the locking member passes through the first locking hole and the second locking hole to restrict the rotation of the first support relative to the second support; when the locking member is in the first unlocked position, the locking member extends out of the first locking hole, and the first support can rotate relative to the second support.

[0005] Optionally, the locking element passes through the second support and can rotate and move relative to the second support; The drive assembly includes an elastic element and a drive element: one end of the elastic element is connected to the locking element, and the other end is connected to the second support; the drive element is connected to the locking element and can rotate and move relative to the second support, and the drive element switches between a second locked position and a second unlocked position; when the drive element is in the second locked position, the drive element drives the locking element to move to the first locked position; when the drive element is in the second unlocked position, the drive element drives the locking element to move to the first unlocked position.

[0006] Optionally, the second support is provided with a guide hole and a first guide surface. The guide hole extends along a first direction and communicates with a second locking hole. The locking member passes through the guide hole along the first direction. The first guide surface is inclined relative to the first direction. The driving member is provided with a second guide surface, which abuts against the first guide surface. When the driving member rotates, the second guide surface slides along the first guide surface, driving the driving member to move along the first direction. When the driving member rotates around the guide hole along the first guide surface to switch between a second locked position and a second unlocked position, the driving member drives the locking member to switch between the first locked position and the first unlocked position.

[0007] Optionally, the first guide surface is disposed around at least a portion of the guide hole; The end of the locking element away from the first support extends through the guide hole and connects to the driving element; When the driving member rotates along the first guide surface, the driving member drives the locking member to move along the first direction.

[0008] Optionally, the outer surface of the drive member is recessed inward to form at least two gripping grooves, which are arranged around the locking member and symmetrically with respect to the locking member.

[0009] Optionally, a relief groove is provided on the inner wall of the guide hole, and the elastic element is disposed in the relief groove; The locking component includes a locking part and a blocking part that are coaxially connected. The locking part slides in the guide hole, and the blocking part is disposed in the relief groove and slides in the relief groove. One end of the elastic element is connected to the inner wall of the relief groove, and the other end is connected to the blocking part.

[0010] Optionally, the elastic element is provided in the locking part.

[0011] Optionally, the first locking hole and / or the second locking hole extend radially along the rotation axis of the first support relative to the second support.

[0012] Optionally, the first support includes a limiting part, which is disposed on one side of the second support along its rotation direction to prevent the second support from rotating; or, The second support includes a limiting part, which is disposed on one side of the first support along its rotation direction, and is used to prevent the first support from rotating.

[0013] Secondly, this application also provides a walking aid, including a front fork, a handlebar stem, and an angle adjustment mechanism as described in any of the first aspects, wherein the front fork and the handlebar stem are rotatably connected via the angle adjustment mechanism.

[0014] The beneficial effects of this utility model are as follows: The angle adjustment mechanism includes a first support and a second support that are rotatably connected. The fork and handlebar stem are rotatably connected through the first and second supports. The first support has multiple first locking holes around its own rotation axis, and the second support has a second locking hole. The first support rotates relative to the second support, aligning the second locking hole with different first locking holes to adjust the angle between the first and second supports. A locking mechanism is movably mounted on the second support and includes a locking element and a drive assembly. The locking element switches between a first locked position and a first unlocked position under the drive assembly. When the locking element is in the first locked position, it passes through the first and second locking holes to restrict the rotation of the first support relative to the second support. When the locking element is in the first unlocked position, it extends out of the first locking hole, allowing the first support to rotate relative to the second support. In practical applications, because the locking element directly passes through the locking holes of the two supports, the locking force is provided by the shear bearing capacity of the hole wall, rather than relying on bolt friction, and is therefore unaffected by bolt loosening or interface plastic deformation. Under vibration or impact loads, the mating surfaces between the locking hole and the locking element uniformly transmit the load, avoiding stress concentration. This improves the reliability of the angle adjustment mechanism's locking mechanism. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is one of the structural schematic diagrams of the angle adjustment mechanism provided in this utility model embodiment; Figure 2 This is the second structural schematic diagram of the angle adjustment mechanism provided in this embodiment of the utility model; Figure 3 This is a cross-sectional structural schematic diagram of a locking mechanism for demonstrating a locked state, provided by an embodiment of this utility model; Figure 4 This is a cross-sectional structural schematic diagram of a locking mechanism for demonstrating the unlocked state, provided by an embodiment of this utility model; Figure 5 This is a partially enlarged schematic diagram provided by an embodiment of the present invention for showing the first guiding surface; Figure 6 This is a partially enlarged schematic diagram provided by an embodiment of the present invention for showing the second guide surface.

[0017] Explanation of icon numbers: 20. First support; 21. First locking hole; 30. Second support; 31. Second locking hole; 32. Guide hole; 33. First guide surface; 34. Relief groove; 40. Locking mechanism; 41. Locking member; 411. Locking part; 412. Blocking part; 42. Drive assembly; 421. Elastic member; 422. Drive member; 4221. Second guide surface; 4222. Grip groove; 43. First locking position; 44. First unlocking position; 45. Second locking position; 46. Second unlocking position; 50. Limiting part; 60. First direction. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1 to 4 As shown, Figure 1 This is one of the structural schematic diagrams of the angle adjustment mechanism provided in this utility model embodiment; Figure 2 This is the second structural schematic diagram of the angle adjustment mechanism provided in this embodiment of the utility model; Figure 3 This is a cross-sectional structural schematic diagram of the locking mechanism 40 for demonstrating the locked state provided in this embodiment of the utility model; Figure 4 This is a cross-sectional structural diagram of the locking mechanism 40 used to demonstrate the unlocked state, provided by an embodiment of this utility model.

[0020] This utility model provides a walking aid, including a front fork, a handlebar stem (the front fork and handlebar stem are not shown in the accompanying drawings), and an angle adjustment mechanism. The front fork and handlebar stem are rotatably connected through the angle adjustment mechanism. In this embodiment, the walking aid is a mobility scooter. In other embodiments, the walking aid can also be a bicycle, an electric bicycle, or other mobility aids including a front fork and handlebar stem.

[0021] Specifically, the angle adjustment mechanism includes a first support 20 and a second support 30 that are rotatably connected. The fork and handlebar stem are rotatably connected via the first support 20 and the second support 30. The first support 20 has multiple first locking holes 21 around its own axis of rotation, and the second support 30 has second locking holes 31. The first support 20 rotates relative to the second support 30, aligning the second locking holes 31 with different first locking holes 21 to adjust the angle between the first support 20 and the second support 30; a locking mechanism 40 is also included. The first support 20 is movably disposed on the second support 30 and includes a locking member 41 and a driving assembly 42. The locking member 41 switches between a first locked position 43 and a first unlocked position 44 under the drive of the driving assembly 42. When the locking member 41 is in the first locked position 43, the locking member 41 passes through the first locking hole 21 and the second locking hole 31 to restrict the rotation of the first support 20 relative to the second support 30. When the locking member 41 is in the first unlocked position, the locking member 41 passes through the first locking hole 21, and the first support 20 can rotate relative to the second support 30.

[0022] In practical applications, by setting the first support 20 and the second support 30 as a rotatable connection, and by opening multiple first locking holes 21 around the rotation axis on the first support 20 and setting a second locking hole 31 on the second support 30, and in conjunction with the locking mechanism 40 that can be movably set on the second support 30, an adjustment method that can achieve multi-position angle locking without bolt clamping is constructed. When the user needs to adjust the tilt angle of the walker's head, the drive assembly 42 is first operated to move the locking member 41 from the first locked position 43 to the first unlocked position 44. At this time, the locking member 41 passes through the first locking hole 21, releasing the restriction on the relative rotation between the first support 20 and the second support 30. Then, the user manually rotates the first support 20 to the desired angle. Since multiple first locking holes 21 are distributed at intervals around the rotation axis, there will always be a first locking hole 21 that can be aligned with the second locking hole 31. After alignment, the drive assembly 42 is operated again to move the locking member 41 to the first locked position 43. The locking member 41 passes through the aligned first locking hole 21 and second locking hole 31, forming a rigid connection, thereby restricting the rotation of the first support 20 relative to the second support 30 and completing the angle fixation. Since the locking member 41 is directly inserted into the locking holes of the two supports, the locking force is provided by the shear bearing capacity of the hole wall, rather than relying on bolt friction, and is therefore unaffected by bolt loosening or interface plastic deformation. Under vibration or impact loads, the mating surfaces between the locking hole and the locking element 41 uniformly transmit the load, avoiding stress concentration. This improves the reliability of the angle adjustment mechanism's locking mechanism.

[0023] In this embodiment, the first support 20 and the second support 30 are rotatably connected. In other embodiments of this application, the first support 20 and the second support 30 can also be locked together by bolts and nuts, with the axis of the bolt coinciding with the rotation axis of the first support 20 relative to the second support 30. A washer is provided between the nut and the first support 20 or the second support 30 to further enhance the reliability of the bolt locking. In this way, the bolt locking and the locking mechanism 40 jointly lock the first support 20 and the second support 30. Even if the bolts loosen, the locking mechanism 40 will still lock them in place, thereby improving the reliability of the angle adjustment mechanism locking.

[0024] Optionally, see Figure 3 and Figure 4 The locking member 41 is inserted through the second support 30 and can rotate and move relative to the second support 30; the driving assembly 42 includes an elastic member 421 and a driving member 422: one end of the elastic member 421 is connected to the locking member 41 and the other end is connected to the second support 30; the driving member 422 is connected to the locking member 41 and can rotate and move relative to the second support 30, and the driving member 422 switches between a second locked position 45 and a second unlocked position 46; when the driving member 422 is in the second locked position 45, the driving member 422 drives the locking member 41 to move to the first locked position 43; when the driving member 422 is in the second unlocked position 46, the driving member 422 drives the locking member 41 to move to the first unlocked position 44.

[0025] In the actual operation of the walker, when the user needs to adjust the headrest angle, first operate the drive component 422 to switch it from the second locked position 45 to the second unlocked position 46. During this process, since the drive component 422 is connected to the locking component 41 and can rotate and move relative to the second support 30, the drive component 422 directly drives the locking component 41 to move, causing the locking component 41 to move from the first locked position 43 to the first unlocked position 44. At this time, the locking component 41 passes through the first locking hole 21, releasing the constraint on the relative rotation between the first support 20 and the second support 30, allowing the user to rotate the first support 20 to the target angle. After the angle is adjusted to the correct position, operate the drive component 422 again to switch it from the second unlocked position 46 to the second locked position 45. The drive component 422 causes the locking component 41 to re-enter the aligned first locking hole 21 and second locking hole 31, restoring the locking of the angle adjustment mechanism.

[0026] Optionally, see Figure 3 , Figure 4 , Figure 5 and Figure 6The second support 30 is provided with a guide hole 32 and a first guide surface 33. The guide hole 32 extends along the first direction 60 and communicates with the second locking hole 31. The locking member 41 passes through the guide hole 32 along the first direction 60. The first guide surface 33 is inclined relative to the first direction 60. The driving member 422 is provided with a second guide surface 4221, which abuts against the first guide surface 33. When the driving member 422 rotates, the second guide surface 4221 slides along the first guide surface 33, driving the driving member 422 to move along the first direction 60. When the driving member 422 rotates around the guide hole 32 along the first guide surface 33 to switch between the second locked position 45 and the second unlocked position 46, the driving member 422 drives the locking member 41 to switch between the first locked position 43 and the first unlocked position 44.

[0027] In actual use of the walker, when the user needs to unlock it to adjust the headrest angle, an external force is applied to make the drive member 422 rotate around the axis of the guide hole 32. Since the second guide surface 4221 on the drive member 422 abuts against the first guide surface 33 on the second support 30, and the first guide surface 33 is inclined relative to the first direction 60 (i.e., the direction of movement of the locking member 41 through the guide hole 32), the rotational motion of the drive member 422 is converted into a linear displacement along the first direction 60. During this process, the drive member 422 drives the locking member 41 connected to it to move together along the guide hole 32 to the first unlock position 44, so that the locking member 41 passes through the first locking hole 21, releasing the constraint on the relative rotation between the first support 20 and the second support 30, and the user can then rotate the first support 20 to the target angle. After the angle adjustment is completed and the first locking hole 21 and the second locking hole 31 are realigned, the user rotates the drive member 422 in the opposite direction. The second guide surface 4221 slides in the opposite direction along the first guide surface 33, and the drive member 422 moves in the opposite direction again along the first direction 60, pushing the locking member 41 into the aligned locking hole and returning to the first locking position 43, thus achieving rigid locking. By setting the guide hole 32 and the inclined first guide surface 33 on the second support 30, and setting the second guide surface 4221 that abuts against it on the drive member 422, a mechanical transmission mechanism that converts rotational motion into linear motion is constructed. When the drive member 422 is in the second locking position 45, the inclination direction of the first guide surface 33 causes an external vibration that attempts to make the drive member 422 rotate in the opposite direction to generate a normal component force that hinders disengagement due to the geometric relationship of the inclined surface. Combined with the continuous pressing force applied by the elastic member 421 to the locking member 41, a double anti-loosening mechanism is formed. In the unlocked state, the energy stored in the elastic member 421 can drive the drive member 422 to quickly reset, improving the response speed.

[0028] Optionally, see Figure 3 , Figure 4 , Figure 5 and Figure 6The first guide surface 33 is disposed around at least part of the guide hole 32; the locking member 41 extends out of the guide hole 32 and is connected to the driving member 422 at one end away from the first support 20; when the driving member 422 rotates along the first guide surface 33, the driving member 422 drives the locking member 41 to move along the first direction 60.

[0029] In actual use of the walker, when the user needs to adjust the head tilt angle, they first apply force to rotate the drive member 422. Since the first guide surface 33 surrounds at least part of the guide hole 32, and the second guide surface 4221 of the drive member 422 always abuts against the annular guide surface, the rotation trajectory of the drive member 422 is constrained on a circumferential path centered on the axis of the guide hole 32, ensuring smooth movement without swaying. At the same time, since the end of the locking member 41 away from the first support 20 protrudes from the guide hole 32 and is directly connected to the drive member 422, when the drive member 422 rotates along the first guide surface 33, the relative sliding between it and the inclined guide surface forces the drive member 422 to generate a displacement along the first direction 60 (i.e., the axial direction of the guide hole 32). This displacement is directly transmitted to the locking member 41 through a rigid connection, causing the locking member 41 to move synchronously along the axial direction of the guide hole 32. When the locking member 41 moves out of the first locking hole 21, the first support 20 and the second support 30 are unlocked, and the user can freely rotate and adjust the angle; after the angle is aligned, the drive member 422 is rotated in the opposite direction, and the locking member 41 re-enters the aligned locking hole to complete the rigid locking.

[0030] Optionally, see Figure 4 and Figure 6 The outer surface of the drive member 422 is recessed inward to form at least two gripping grooves 4222, which are arranged around the locking member 41 and are symmetrically arranged with respect to the locking member 41.

[0031] In the actual use of the walker, when the user needs to adjust the head tilt angle, the user needs to rotate the drive component 422 by hand. The user's fingers can naturally embed into the grip groove 4222 to form a stable and non-slip grip point, so that the torque applied by the user can be efficiently and without bias transmitted to the drive component 422, so that it can rotate smoothly around the axis of the guide hole 32.

[0032] Optionally, refer to Figure 3 and Figure 4 The inner wall of the guide hole 32 is provided with a relief groove 34, and the elastic member 421 is disposed in the relief groove 34; the locking member 41 includes a locking part 411 and a blocking part 412 coaxially connected. The locking part 411 is slidably engaged with the guide hole 32, and the blocking part 412 is disposed in the relief groove 34 and slidably engaged with the relief groove 34. One end of the elastic member 421 is connected to the inner wall of the relief groove 34, and the other end is connected to the blocking part 412.

[0033] In practical applications, the elastic element 421 is completely accommodated in the relief groove 34 on the inner wall of the guide hole 32, and is not exposed outside the mechanism, thus avoiding corrosion, jamming, or fatigue failure caused by the intrusion of dust, moisture, or foreign objects. At the same time, this layout allows the entire locking mechanism 40 to be highly integrated inside the second support 30, significantly reducing the external profile and improving the overall aesthetics and impact resistance of the walker.

[0034] In this embodiment, the elastic element 421 is a torsion spring. In other embodiments of this application, the elastic element 421 may also be a spring or other elastic structure.

[0035] Optionally, refer to Figure 3 and Figure 4 The elastic element 421 is fitted onto the locking part 411.

[0036] In practical applications, since the elastic element 421 is not only connected to the inner wall of the relief groove 34 at one end and to the blocking part 412 at the other end, but also is entirely sleeved on the outer periphery of the locking part 411, the elastic element 421 provides axial reset force while applying a uniform circumferential clamping force to the locking part 411 it covers. The circumferential clamping force keeps the locking part 411 always centered in the guide hole 32, effectively compensating for minor eccentricity caused by manufacturing tolerances or external disturbances, ensuring that the head of the locking element 41 is accurately aligned with the first locking hole 21 and the second locking hole 31, avoiding jamming, wear, or even inability to lock due to misalignment.

[0037] In this embodiment, the elastic element 421 is a torsion spring, which is coaxially fixedly connected to the locking part 411 and coaxially disposed with the guide hole 32.

[0038] Optionally, refer to Figure 1 The first locking hole 21 and / or the second locking hole 31 extend radially along the rotation axis of the first support 20 relative to the second support 30.

[0039] In practical applications, the radially extending first locking hole 21 has good tolerance in manufacturing and assembly. Even if there is a slight misalignment or a large tolerance between the first support 20 and the second support 30, causing the first locking hole 21 and the second locking hole 31 to deviate radially from the axis of rotation of the first support 20 relative to the second support 30, the first locking hole 21 and the second locking hole 31 can still be aligned, so that the locking member 41 can still be smoothly inserted into the first locking hole 21 and the second locking hole 31. This reduces the stringent requirements on the machining accuracy of parts and the alignment of the assembly.

[0040] Optionally, refer to Figure 1 and Figure 2 The first support 20 includes a limiting part 50, which is disposed on one side of the second support 30 along its rotation direction to prevent the second support 30 from rotating; or, The second support 30 includes a limiting part 50, which is disposed on one side of the first support 20 along its rotation direction, and is used to prevent the first support 20 from rotating.

[0041] In practical applications, this feature is used to mechanically limit the relative rotation range between the first support 20 and the second support 30. This feature, by providing a limiting part 50 on one support and arranging it on one side of the other support along the direction of rotation, ensures that the two supports do not exceed a preset angular travel during rotational adjustment, thereby avoiding structural interference, cable pulling, or safety hazards caused by excessive rotation. In actual use of the walker, without a limiting part, the user may unintentionally turn the faucet to its extreme position, causing pulling on the connecting harness or damage to the internal structure.

[0042] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0043] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0044] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0045] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An angle adjustment mechanism, characterized in that, include: The first support and the second support are rotatably connected. The first support has a plurality of first locking holes around its own rotation axis, and the second support has a second locking hole. The first support rotates relative to the second support so that the second locking hole is aligned with different first locking holes, which is used to adjust the angle between the first support and the second support. A locking mechanism, movably mounted on the second support, includes a locking member and a driving assembly, wherein the locking member switches between a first locked position and a first unlocked position under the drive of the driving assembly; When the locking member is in the first locked position, the locking member passes through the first locking hole and the second locking hole to restrict the first support from rotating relative to the second support; When the locking member is in the first unlocked position, the locking member extends out of the first locking hole, and the first support can rotate relative to the second support.

2. The angle adjustment mechanism according to claim 1, characterized in that, The locking member is inserted through the second support and can rotate and move relative to the second support; The drive assembly includes an elastic element and a drive element: One end of the elastic element is connected to the locking element, and the other end is connected to the second support; The drive member is connected to the locking member and can rotate and move relative to the second support. The drive member switches between a second locked position and a second unlocked position. When the driving member is in the second locking position, the driving member drives the locking member to move to the first locking position; When the driving element is in the second unlocked position, the driving element drives the locking element to move to the first unlocked position.

3. The angle adjustment mechanism according to claim 2, characterized in that, The second support is provided with a guide hole and a first guide surface. The guide hole extends along a first direction and communicates with the second locking hole. The locking member passes through the guide hole along the first direction. The first guide surface is inclined relative to the first direction. The driving component is provided with a second guide surface, which abuts against the first guide surface. When the driving component rotates, the second guide surface slides along the first guide surface, driving the driving component to move in the first direction. When the drive member rotates along the first guide surface around the guide hole to switch between the second locked position and the second unlocked position, the drive member drives the locking member to switch between the first locked position and the first unlocked position.

4. The angle adjustment mechanism according to claim 3, characterized in that, The first guide surface is disposed around at least a portion of the guide hole; The locking member extends through the guide hole at the end away from the first support and is connected to the driving member; When the driving member rotates along the first guide surface, the driving member drives the locking member to move along the first direction.

5. The angle adjustment mechanism according to claim 4, characterized in that, The outer surface of the drive member is recessed inward to form at least two gripping grooves, which are arranged around the locking member and symmetrically with respect to the locking member.

6. The angle adjustment mechanism according to claim 3, characterized in that, The inner wall of the guide hole is provided with a relief groove, and the elastic element is disposed in the relief groove; The locking member includes a locking part and a blocking part coaxially connected. The locking part is slidably engaged with the guide hole, and the blocking part is disposed in the relief groove and slidably engaged with the relief groove. One end of the elastic member is connected to the inner wall of the relief groove, and the other end is connected to the blocking part.

7. The angle adjustment mechanism according to claim 6, characterized in that, The elastic element is fitted onto the locking part.

8. The angle adjustment mechanism according to claim 1, characterized in that, The first locking hole and / or the second locking hole extend radially along the rotation axis of the first support relative to the second support.

9. The angle adjustment mechanism according to claim 1, characterized in that, The first support includes a limiting part, which is disposed on one side of the second support along its rotation direction to prevent the second support from rotating; or, The second support includes a limiting part, which is disposed on one side of the first support along its rotation direction to prevent the first support from rotating.

10. A walking aid, characterized in that, It includes a front fork, a handlebar stem, and an angle adjustment mechanism as described in any one of claims 1-9, wherein the front fork and the handlebar stem are rotatably connected via the angle adjustment mechanism.

Images