Height adjustment assembly and scooter
By designing the riser, adapter, and locking components, the problem of inconvenient handlebar height adjustment for mobility scooters was solved, achieving stepless adjustment and improving ease of operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINE TECH CO LTD
- Filing Date
- 2025-10-15
- Publication Date
- 2026-07-21
AI Technical Summary
The handlebar height adjustment of existing mobility scooters is inconvenient and makes it difficult to achieve stepless adjustment.
A height adjustment assembly was designed, including a riser, an adapter, and a locking assembly. Through the mutual cooperation of the first and second locking structures, stepless movement of the shaft in the slide groove and stepless height adjustment are achieved.
The system improves the ease of height adjustment for mobility scooters, enabling stepless adjustment and enhancing operational convenience.
Smart Images
Figure CN224528894U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of mobility scooter technology, and more particularly to a height-adjustable assembly and a mobility scooter. Background Technology
[0002] In related technologies, such as the handlebars of electric vehicles, adjusting the height involves inserting an adjusting pin into different locking holes, which is inconvenient. Utility Model Content
[0003] In view of this, embodiments of this application aim to provide a height adjustment component and a mobility scooter to achieve stepless adjustment of the height of the object being adjusted.
[0004] This application provides a height adjustment component for a mobility scooter, comprising: A riser assembly includes a riser and a first locking fit structure, the first locking fit structure being fixed to the outside of the riser, the riser being provided with a sliding groove extending along the length direction of the riser; The adapter includes a seat and a second locking mechanism, wherein one of the riser and the seat is used to connect an adjustment object; the second locking mechanism is movable relative to the seat. The locking assembly includes an interconnected shaft and an operating part, the operating part being rotatable relative to the shaft, the shaft connecting the seat and the second locking engagement structure, the shaft passing through the slide groove in a first direction, and the shaft being capable of driving the entire adapter to move along the extension direction of the slide groove; The locking component has an unlocked position and a locked position. In the locked position, the operating part applies a force to the second locking engagement structure to make the second locking engagement structure and the first locking engagement structure clamp together, thereby locking the height of the object to be adjusted. In the unlocked position, the second locking engagement structure and the first locking engagement structure disengage, and the riser and the seat can move relative to each other along the length direction, thereby adjusting the height of the object to be adjusted. Wherein, the first direction is perpendicular to the length direction.
[0005] In some embodiments, the first locking engagement structure includes a first tooth arranged along the length direction, and the second locking engagement structure includes a second tooth arranged along the length direction in the locked position, and the first tooth and the second tooth are engaged.
[0006] In some implementations, the riser and the first locking structure are an integral structure.
[0007] In some embodiments, the first locking fit structure includes an interconnected collar portion and two plate portions. The collar portion is sleeved and fixed to the outer periphery of the riser. The two plate portions are arranged at intervals along a second direction. The riser is disposed between the two plate portions. The second direction, the first direction, and the length direction are perpendicular to each other.
[0008] In some embodiments, the seat includes a main body and a connecting plate connected to each other, the main body being used to connect the adjustment object, the connecting plate extending from the main body along the length direction, the second locking fit structure extending along the length direction, and the connecting plate and the second locking fit structure being spaced apart along the first direction, with the riser disposed between the connecting plate and the second locking fit structure.
[0009] In some embodiments, the body has a guide groove that extends along the first direction, and a limiting block is formed at one end of the second locking structure near the body. The limiting block is accommodated in the guide groove and can slide in the guide groove along the first direction.
[0010] In some embodiments, the body further has a notch communicating with the guide groove, the notch being located on the side of the guide groove facing the first locking engagement structure in a second direction, the second locking engagement structure passing through the notch, and the dimension of the notch in the second direction being smaller than the dimension of the limiting block in the second direction; Wherein, the first direction, the second direction, and the length direction are perpendicular to each other.
[0011] In some implementations, the limiting block slides with the guide groove within the range of motion of the second locking structure.
[0012] In some embodiments, the operating part includes a disc and a handle connected to each other, the disc being rotatably connected to the shaft; the shaft passes through the second locking engagement structure, and the circumferential surface of the disc has a cam surface for engaging with the second locking engagement structure during rotation of the disc, thereby switching between the locked position and the unlocked position; And / or, the second locking engagement structure is rotatably connected to the seat portion, and the operating portion is used to drive the second locking engagement structure to rotate.
[0013] This application provides a mobility scooter, including the height adjustment component described in any of the above embodiments; The mobility scooter includes a handlebar and a frame, the handlebar and the frame being connected by the height adjustment assembly; and / or, the mobility scooter includes a saddle and a frame, the saddle and the frame being connected by the height adjustment assembly.
[0014] The height adjustment component and mobility scooter of this application embodiment, through the mutual cooperation of the first locking structure and the second locking structure, allow the axle to stop moving at any point in the slide groove, enabling stepless change in the positional relationship between the riser and the seat along the extension direction of the slide groove. When the height adjustment component is used in the mobility scooter, the object to be adjusted is connected to one of the riser and the seat, and the frame of the mobility scooter is connected to the other, so that the extension direction of the slide groove is parallel to the height direction of the mobility scooter. When the riser and the seat move relative to each other along the extension direction of the slide groove, the height of the object to be adjusted is achieved. Furthermore, since the axle can stop moving at any point in the slide groove, the height of the object to be adjusted can be fixed at any position within the adjustment range, enabling stepless height adjustment and improving the convenience of height adjustment. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of the height adjustment component provided in the embodiments of this application; Figure 2 for Figure 1 A structural diagram omitting the first locking fit structure; Figure 3 for Figure 1 Schematic diagram of the central tube assembly; Figure 4 A schematic diagram of the adapter, locking component and first locking engagement structure in the height adjustment assembly provided in the embodiments of this application; Figure 5 for Figure 4 A cross-sectional schematic diagram; Figure 6 for Figure 4 A structural diagram omitting the first locking fit structure; Figure 7 for Figure 4 An exploded view of the intermediate connector.
[0016] Explanation of reference numerals in the attached figures 1. Height adjustment assembly; 10. Riser assembly; 11. Riser; 11a. Slide groove; 12. First locking fit structure; 12a. First toothed part; 121. Collar part; 122. Plate part; 20. Adapter; 21. Seat; 21a. Guide groove; 211. Main body; 211a. Notch; 212. Connecting plate; 22. Second locking fit structure; 22a. Second tooth; 221. Limiting block; 30. Locking assembly; 31. Shaft; 32. Operating part; 321. Disc body; 322. Handle. Detailed Implementation
[0017] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.
[0018] The specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different combinations of specific technical features can form different embodiments and technical solutions. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this application will not be described separately.
[0019] In the following description, the terms "first," "second," etc., are used merely to distinguish different objects and do not indicate that the objects have the sameness or relationship. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to the orientation under normal use conditions, while "left" and "right" refer to the left and right directions shown in the corresponding diagrams, which may or may not be the left and right directions under normal use conditions.
[0020] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. "A plurality of" means two or more.
[0021] This application provides a height adjustment component 1 for a mobility scooter. Please refer to... Figure 1 and Figure 2 The height adjustment assembly 1 includes a riser assembly 10, an adapter 20, and a locking assembly 30.
[0022] It should be noted that there are no restrictions on the specific type of mobility vehicle. For example, it can be an electric scooter, an electric mountain bike, an electric bicycle, an electric moped, an electric motorcycle, etc.
[0023] Please refer to Figure 3 The riser assembly 10 includes a riser 11 and a first locking structure 12. The first locking structure 12 is fixed to the outside of the riser 11, that is, the first locking structure 12 and the riser 11 do not move relative to each other.
[0024] It is understandable that the riser 11 has a certain structural strength and can support the first locking structure 12.
[0025] Please refer to Figures 4 to 7 The adapter 20 includes a seat 21 and a second locking engagement structure 22. One of the riser 11 and the seat 21 is used to connect to the adjustment object. Thus, when the height adjustment assembly 1 is used for a mobility scooter, either the riser 11 can be connected to the adjustment object and the seat 21 can be connected to the frame of the mobility scooter, or the seat 21 can be connected to the adjustment object and the riser 11 can be connected to the frame of the mobility scooter.
[0026] The second locking structure 22 can move relative to the seat 21. It should be noted that the specific way the second locking structure 22 moves relative to the seat 21 is not limited.
[0027] Please refer to Figure 5 and Figure 6 The locking assembly 30 includes a shaft 31 and an operating part 32 connected to each other, and the operating part 32 is rotatable relative to the shaft 31.
[0028] Please refer to Figure 5 and Figure 6 The shaft 31 connects the seat 21 and the second locking structure 22. In this way, the seat 21 and the second locking structure 22 can establish a connection relationship through the shaft 31. The second locking structure 22 will not fall off the shaft 31 during the movement of the second locking structure 22 relative to the seat 21, so as to ensure the connection relationship between the second locking structure 22 and the seat 21.
[0029] Please refer to Figure 2 and Figure 3 The riser 11 is provided with a groove 11a, which extends along the length of the riser 11. The shaft 31 passes through the groove 11a in a first direction, and the shaft 31 can drive the entire adapter 20 to move along the extension direction of the groove 11a. It can be understood that during the movement of the shaft 31 within the groove 11a, it can drive the seat 21 to move relative to the riser 11 in the extension direction of the groove 11a.
[0030] It should be noted that the first direction is as follows: Figure 4 As shown by the arrow in the "first direction", the length direction is as follows: Figure 1 As indicated by the arrow for "length direction", in this embodiment, the first direction is perpendicular to the length direction.
[0031] The locking assembly 30 has an unlocked position and a locked position. In the locked position, the operating part 32 applies force to the second locking engagement structure 22 to clamp the second locking engagement structure 22 and the first locking engagement structure 12, thereby locking the height of the object to be adjusted. In the unlocked position, the second locking engagement structure 22 and the first locking engagement structure 12 disengage, and the riser 11 and the seat 21 can move relative to each other along the length direction, thereby adjusting the height of the object to be adjusted.
[0032] It should be noted that during the rotation of the operating part 32 relative to the shaft 31, the locking component 30 switches between the unlocked position and the locked position.
[0033] Thus, through the mutual cooperation of the first locking structure 12 and the second locking structure 22, the shaft 31 can stop moving at any point in the slide groove 11a, so that the positional relationship between the riser 11 and the seat 21 along the extension direction of the slide groove 11a can be infinitely varied. That is, within the length range of the slide groove 11a, there are an infinite number of relative positions between the riser 11 and the seat 21, and the relative positions can be adjusted smoothly and continuously.
[0034] In other words, when the height adjustment component 1 of this embodiment is used in a mobility scooter, the scooter's adjustment object is connected to one of the riser 11 and the seat 21, and the scooter's frame is connected to the other. This ensures that the extension direction of the slide 11a is parallel to the height direction of the scooter. When the riser 11 and the seat 21 move relative to each other along the extension direction of the slide 11a, the height of the adjustment object is adjusted. Furthermore, since the axle 31 can stop moving at any point in the slide 11a, the height of the adjustment object can be fixed at any position within the adjustment range, enabling stepless height adjustment and improving the convenience of height adjustment.
[0035] It should be noted that the specific structure of the first locking fit structure 12 is not limited. The specific structure of the second locking fit structure 22 is not limited.
[0036] In some embodiments, please refer to Figure 3 and Figure 5 The first locking engagement structure 12 includes a first tooth 12a arranged along the length direction, and the second locking engagement structure 22 includes a second tooth 22a arranged along the length direction. In the locked position, the first tooth 12a and the second tooth 22a are engaged. It is understood that when the first tooth 12a and the second tooth 22a are engaged, the structural strength of the teeth themselves can be used to resist relative movement between the first tooth 12a and the second tooth 22a along the length direction, ensuring that the first locking engagement structure 12 and the second locking engagement structure 22 remain relatively stationary, thereby improving the stability of the locking assembly 30 in the locked position.
[0037] It should be noted that the specific shape of the first tooth 12a is not limited. The specific shape of the second tooth 22a is not limited.
[0038] It should be noted that the specific method by which the first locking structure 12 is fixed to the outside of the riser 11 is not limited.
[0039] In some embodiments, the riser 11 and the first locking engagement structure 12 are an integral structure. This improves the structural strength of the connection between the riser 11 and the first locking engagement structure 12, thereby ensuring the stability of the locking assembly 30 in the locked position.
[0040] In some embodiments, please refer to Figure 3 The first locking structure 12 includes a collar portion 121 and two plate portions 122 connected to each other. The collar portion 121 is sleeved and fixed to the outer periphery of the riser 11. The two plate portions 122 are arranged at intervals along the second direction, and the riser 11 is located between the two plate portions 122.
[0041] It is understood that the first locking fit structure 12 can be manufactured separately, thereby improving the manufacturing efficiency of the first locking fit structure 12. In addition, in the embodiment where the first locking fit structure 12 includes a first tooth 12a, the first tooth 12a is located on two plate portions 122, so that the flat surface of the plate portion 122 can be utilized, which is beneficial for the first tooth 12a to engage with the second tooth 22a.
[0042] It should be noted that the second direction, such as Figure 3 As indicated by the arrow for "second direction", in this embodiment, the second direction, the first direction, and the length direction are perpendicular to each other.
[0043] It should be noted that the specific structure of the seat 21 is not limited.
[0044] In some embodiments, please refer to Figures 4 to 7 The seat 21 includes a main body 211 and a connecting plate 212 connected to each other. The main body 211 is used to connect the adjustment object. The connecting plate 212 extends from the main body 211 along the length direction. The second locking engagement structure 22 extends along the length direction. The connecting plate 212 and the second locking engagement structure 22 are arranged at intervals along the first direction. The riser 11 is located between the connecting plate 212 and the second locking engagement structure 22.
[0045] It should be noted that in this embodiment, the shaft 31 connects the second locking fit structure 22 and the connecting plate 212. Thus, the connecting plate 212 and the second locking fit structure 22 are arranged at intervals along the first direction, which facilitates the connection of the shaft 31 extending along the first direction to the second locking fit structure 22 and the connecting plate 212, while also facilitating the shaft 31 to pass through the sliding groove 11a on the riser 11, resulting in a reasonable structural arrangement.
[0046] Please refer to Figure 4 In an embodiment where the first locking structure 12 includes an interconnected collar portion 121 and two plate portions 122, the connecting plate 212 extends between the two plate portions 122, and a portion of the second locking structure 22 is located between the two plate portions 122. It is understood that the two plate portions 122 are spaced apart along a second direction, and the connecting plate 212 and the second locking structure 22 are spaced apart along a first direction. When the seat portion 21 rotates circumferentially around the riser 11, the connecting plate 212 and the second locking structure 22 can engage with the plate portion 122 to stop and restrict the relative rotation between the seat portion 21 and the riser 11, thereby ensuring the stability of the relative movement of the seat portion 21 and the riser 11 along the length direction.
[0047] It should be noted that the specific movement of the second locking structure 22 relative to the seat 21 is not limited.
[0048] In some embodiments, the second locking engagement structure 22 is rotatably connected to the seat portion 21, and the operating portion 32 is used to drive the second locking engagement structure 22 to rotate.
[0049] Thus, the second locking engagement structure 22 can rotate relative to the seat 21. Adjusting the rotation angle of the second locking engagement structure 22 enables the second locking engagement structure 22 to switch between engaging with the first locking engagement structure 12 and disengaging from the first locking engagement structure 12, making operation convenient.
[0050] It should be noted that in this embodiment, the specific way in which the operating unit 32 drives the second locking structure 22 to rotate is not limited. For example, it can be driven directly by a motor.
[0051] In some embodiments, please refer to Figure 7 The main body 211 has a guide groove 21a that extends along a first direction. A limiting block 221 is formed at one end of the second locking structure 22 near the main body 211. The limiting block 221 is housed in the guide groove 21a and can slide within it along the first direction. Thus, the sliding of the limiting block 221 within the guide groove 21a allows the second locking structure 22 to move relative to the seat 21 along a predetermined path, improving the stability of the interaction between the second locking structure 22 and the first locking structure 12.
[0052] In this embodiment, the second locking engagement structure 22 slides relative to the seat portion 21.
[0053] It should be noted that the specific shape of the guide groove 21a is not limited.
[0054] In some embodiments, please refer to Figure 7The main body 211 also has a notch 211a that communicates with the guide groove 21a. The notch 211a is located on the side of the guide groove 21a facing the first locking structure 12 in the second direction. The second locking structure 22 passes through the notch 211a, and the size of the notch 211a in the second direction is smaller than the size of the limiting block 221 in the second direction.
[0055] Understandably, when the limiting block 221 attempts to move in the second direction toward the side of the first locking structure 12, the notch 211a can stop the limiting block 221, thereby restricting its movement. This reduces the likelihood of the limiting block 221 falling out of the guide groove 21a through the notch 211a, thus ensuring the stability of the limiting block 221 as it slides within the guide groove 21a.
[0056] In some embodiments, please refer to Figure 7 Within the range of motion of the second locking structure 22, the limiting block 221 slides with the guide groove 21a. It is understood that during the movement of the second locking structure 22 relative to the seat 21, the length of the guide groove 21a is sufficient to meet the sliding requirements of the limiting block 221. This prevents the limiting block 221 from sliding out of the guide groove 21a, thus ensuring the stability of the sliding engagement between the limiting block 221 and the guide groove 21a.
[0057] It should be noted that the specific structure of the operating section 32 is not limited.
[0058] In some embodiments, please refer to Figure 6 The operating unit 32 includes a disc 321 and a handle connected to each other, with the disc 321 rotatably connected to the shaft 31. This allows the user to apply force to the handle to rotate the operating unit 32 relative to the shaft 31, improving the user's ease of operation.
[0059] For example, the shaft 31 passes through the second locking engagement structure 22, and the circumferential surface of the disc 321 has a cam surface, which is used to engage with the second locking engagement structure 22 during the rotation of the disc 321, thereby enabling switching between the locked position and the unlocked position.
[0060] Understandably, during the rotation of the disc 321, the cam surface contacts the second locking engagement structure 22, and the disc 321 applies a force to the second locking engagement structure 22, causing the extension direction of the shaft 31 of the second locking engagement structure 22 to move. This causes the second locking engagement structure 22 and the first locking engagement structure 12 to engage, thus entering the locked position. When the cam surface disengages from the second locking engagement structure 22, a gap appears between the second locking engagement structure 22 and the disc 321, causing the second locking engagement structure 22 and the first locking engagement structure 12 to disengage, thus entering the unlocked position. In this way, the operating part 32 has a simple structure and high stability.
[0061] It should be noted that when a gap appears between the second locking structure 22 and the disc body 321, the second locking structure 22 has space to move toward the disc body 321. Under the action of external force, the second locking structure 22 moves toward the disc body 321, causing a gap to appear between the second locking structure 22 and the first locking structure 12, thereby causing the second locking structure 22 and the first locking structure 12 to disengage.
[0062] The aforementioned external force can be a component of the force applied by the user when adjusting the height of the object, or it can be a force applied by other structures of the height adjustment component 1. For example, in some embodiments, the height adjustment component 1 includes a spring element, which is disposed in the guide groove 21a and abuts against the limiting block 221. The spring element is used to store energy during the sliding of the limiting block 221 toward the first locking engagement structure 12, so as to apply a reset force to the limiting block 221. In this way, when the cam surface disengages from the second locking engagement structure 22, the second locking engagement structure 22 can disengage from the first locking engagement structure 12 under the reset force of the spring element, so as to quickly enter the unlocked position and improve the convenience of user operation.
[0063] This application also provides a mobility scooter, which includes the height adjustment component 1 in any of the above embodiments.
[0064] In some embodiments, the personal mobility vehicle includes a handlebar and a frame, which are connected by a height adjustment assembly 1. This enables stepless adjustment of the handlebar height, facilitating user posture adjustment and improving the user's driving experience.
[0065] In some embodiments, the mobility scooter includes a saddle and a frame, which are connected by a height adjustment assembly 1. This allows for stepless height adjustment of the saddle, facilitating user adjustment of the scooter's seating posture and improving the user's riding experience.
[0066] In the description of this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine different embodiments or examples described in this application, as well as features of different embodiments or examples.
[0067] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.
Claims
1. A height-adjustable assembly for a mobility scooter, characterized in that, include: A riser assembly includes a riser and a first locking fit structure, the first locking fit structure being fixed to the outside of the riser, the riser being provided with a sliding groove extending along the length direction of the riser; The adapter includes a seat and a second locking mechanism, wherein one of the riser and the seat is used to connect an adjustment object; the second locking mechanism is movable relative to the seat. The locking assembly includes an interconnected shaft and an operating part, the operating part being rotatable relative to the shaft, the shaft connecting the seat and the second locking engagement structure, the shaft passing through the slide groove in a first direction, and the shaft being capable of driving the entire adapter to move along the extension direction of the slide groove; The locking component has an unlocked position and a locked position. In the locked position, the operating part applies a force to the second locking engagement structure to make the second locking engagement structure and the first locking engagement structure clamp together, thereby locking the height of the object to be adjusted. In the unlocked position, the second locking engagement structure and the first locking engagement structure disengage, and the riser and the seat can move relative to each other along the length direction, thereby adjusting the height of the object to be adjusted. Wherein, the first direction is perpendicular to the length direction.
2. The height adjustment assembly according to claim 1, characterized in that, The first locking engagement structure includes a first tooth portion arranged along the length direction, and the second locking engagement structure includes a second tooth portion. In the locked position, the second tooth portion is arranged along the length direction, and the first tooth portion and the second tooth portion are engaged.
3. The height adjustment assembly according to claim 1, characterized in that, The riser and the first locking mechanism are an integral structure.
4. The height adjustment assembly according to claim 1, characterized in that, The first locking fit structure includes a collar portion and two plate portions connected to each other. The collar portion is sleeved and fixed to the outer periphery of the riser. The two plate portions are arranged at intervals along a second direction. The riser is located between the two plate portions. The second direction, the first direction, and the length direction are perpendicular to each other.
5. The height adjustment assembly according to claim 1, characterized in that, The seat includes a main body and a connecting plate that are connected to each other. The main body is used to connect the adjustment object. The connecting plate extends from the main body along the length direction. The second locking fit structure extends along the length direction. The connecting plate and the second locking fit structure are arranged at intervals along the first direction. The riser is located between the connecting plate and the second locking fit structure.
6. The height adjustment assembly according to claim 5, characterized in that, The main body has a guide groove that extends along the first direction. The second locking structure forms a limiting block at one end near the main body. The limiting block is accommodated in the guide groove and can slide in the guide groove along the first direction.
7. The height adjustment assembly according to claim 6, characterized in that, The main body also has a notch communicating with the guide groove. The notch is located on the side of the guide groove facing the first locking structure in the second direction. The second locking structure passes through the notch, and the size of the notch in the second direction is smaller than the size of the limiting block in the second direction. Wherein, the first direction, the second direction, and the length direction are perpendicular to each other.
8. The height adjustment assembly according to claim 7, characterized in that, Within the range of motion of the second locking structure, the limiting block slides with the guide groove.
9. The height adjustment assembly according to any one of claims 1 to 8, characterized in that, The operating part includes a disc body and a handle connected to each other. The disc body is rotatably connected to the shaft. The shaft passes through the second locking engagement structure. The circumferential surface of the disc body has a cam surface. The cam surface is used to engage with the second locking engagement structure during the rotation of the disc body, thereby realizing the switching between the locked position and the unlocked position. And / or, the second locking engagement structure is rotatably connected to the seat portion, and the operating portion is used to drive the second locking engagement structure to rotate.
10. A mobility scooter, characterized in that, The vehicle includes a height adjustment component as described in any one of claims 1 to 9; the vehicle includes a handlebar and a frame, the handlebar and the frame being connected via the height adjustment component; and / or, the vehicle includes a saddle and a frame, the saddle and the frame being connected via the height adjustment component.