Telescopic tube locking mechanism and scooter

Abstract

The utility model provides a telescopic pipe locking mechanism, include: outer tube, inner tube and locking assembly, be equipped with first radial hole on the outer tube, and locking assembly includes the cuff, handle and briquetting, the cuff synchronous sleeve is equipped in the outer tube and the outer periphery of inner tube, and the cuff includes first sleeve joint part, second sleeve joint part and second radial hole, and the annular step is formed between first sleeve joint part and second sleeve joint part, and the briquetting is movably arranged in second radial hole, and the elastic pressing piece is equipped on the briquetting, and handle can swingly connect the cuff, and the eccentric shaft is equipped on the handle, and the outer wall of inner tube is equipped with the friction pad, and handle drives eccentric shaft to contact briquetting to extrude or loosen briquetting, extrude, and the elastic pressing piece will inner tube abut in the friction pad, loosen, and the elastic pressing piece is to the inner tube away, when the upper end of friction pad abuts the annular step, and inner tube is in the limit stretch out state. It is convenient to operate, and it is firm, can reduce the wear and tear of inner tube, outer tube and locking assembly.

Description

Technical Field

[0001] This utility model relates to the field of mobility scooter technology, specifically to a telescopic tube locking mechanism and a mobility scooter. Background Technology

[0002] As people's demands for the convenience and storage of tools continue to increase, extendable structures and matching locking mechanisms are widely used in everyday tools and short-distance travel equipment, such as cleaning mops, scooters, and mobility scooters. In these products, the extendable structure is the core component that enables "extending when in use and shortening when stored."

[0003] The telescopic structure of the aforementioned products typically includes an inner tube and an outer tube. The inner tube is movably fitted inside the outer tube, and a locking component is provided at the connection between the inner and outer tubes. When the inner and outer tubes slide relative to each other to a preset length position, they are locked by the locking component, causing the inner and outer tubes to press against each other. The friction generated by the pressing helps to fix the two tubes relative to each other, thereby ensuring the structural stability of the product during use.

[0004] However, existing locking mechanisms generally suffer from a design flaw of "direct compression contact": during locking, the locking component acts directly on the inner or outer tube, causing the contact surfaces of the inner and outer tubes and the locking component to directly bear compressive stress and generate friction. After long-term use, the contact surfaces are prone to scratches and deformation due to wear, which not only affects the product's appearance integrity but also weakens the fitting precision of the inner and outer tubes, leading to decreased locking stability and ultimately shortening the overall product lifespan. Utility Model Content

[0005] The present invention aims to at least partially solve one of the technical problems in the aforementioned technologies. Therefore, one objective of the present invention is to provide a telescopic tube locking mechanism that is easy to operate, securely fixed, and reduces wear between the inner tube, outer tube, and locking assembly.

[0006] To achieve the above objectives, this utility model proposes a telescopic tube locking mechanism, which includes: an outer tube, an inner tube, and a locking component;

[0007] The outer tube has a first radial hole. The locking assembly includes a sleeve, a handle, and a pressure block. The sleeve is simultaneously fitted onto the outer circumference of both the outer and inner tubes. The sleeve includes a first fitting portion that matches the outer wall of the outer tube, a second fitting portion that matches the outer wall of the inner tube, and a second radial hole communicating with the first radial hole. An annular step is formed between the first and second fitting portions. The pressure block is movably disposed within the second radial hole and has an elastic pressure plate. The handle is swayably connected to the sleeve and has a feature for eccentric contact with the elastic pressure plate. An eccentric shaft is provided, and a friction plate is provided on the outer wall of the inner tube. The handle is used to drive the eccentric shaft to make eccentric contact with the pressure block to squeeze or release the pressure block. When squeezing, the pressure block drives the elastic pressure plate to move closer to the inner tube. The elastic pressure plate pushes against the inner tube, so that the friction plate contacts and squeezes the inner wall of the outer tube, thereby locking the inner tube. When releasing, the elastic pressure plate releases its push against the inner tube, so that the inner tube is in a retractable adjustment state. When the upper end of the friction plate abuts against the annular step, the inner tube is in the extreme extension state.

[0008] According to the present invention, a telescopic tube locking mechanism is proposed, in which an outer tube and an inner tube are simultaneously fitted with a retaining sleeve, allowing the inner tube to extend and retract within the outer tube without contact. When the handle is swung, its eccentric structure drives the elastic pressure plate to move. The elastic pressure plate elastically compresses and increases the friction with the inner tube, while simultaneously pushing the inner tube so that the friction plate on the outer wall compresses against the inner wall of the outer tube, generating friction. The two work together to achieve stable locking of the inner tube. The friction plate can avoid direct contact between the inner and outer tubes to reduce wear, and its contact with the retaining sleeve can prevent the inner tube from detaching. This mechanism is easy to operate and securely fixed.

[0009] In addition, the telescopic tube locking mechanism proposed in the above embodiments of this utility model may also have the following additional technical features:

[0010] Optionally, there are two friction pads, which are arranged in a triangular configuration with the elastic pressure plate.

[0011] Optionally, the outer tube and the inner tube are made of carbon fiber.

[0012] Optionally, the elastic pressure plate and the pressure block are bonded together with adhesive.

[0013] Furthermore, the friction plate has a boss on its inner side, and the inner tube has a mounting hole corresponding to the position of the boss, with the boss engaging with the mounting hole.

[0014] Optionally, the handle is swayably connected to the sleeve via a pin, and the sleeve has a pivot hole corresponding to the position of the handle, with the pin passing through the pivot hole so that the handle can swing around the pin.

[0015] Optionally, the pressure block is provided with a groove, and the elastic pressure plate is disposed in the groove.

[0016] Optionally, the pressure block has an arc-shaped contact surface on the side facing the eccentric shaft, and the contour of the arc-shaped contact surface is adapted to the outer peripheral contour of the eccentric shaft.

[0017] Another objective of this invention is to provide a mobility scooter that includes the aforementioned telescopic tube locking mechanism. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the telescopic tube locking mechanism according to an embodiment of the present utility model;

[0019] Figure 2 for Figure 1 Sectional view along AA;

[0020] Figure 3 This is an exploded view of the telescopic tube locking mechanism according to an embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of the locking assembly according to an embodiment of the present utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the friction plate according to an embodiment of the present invention;

[0023] Figure 6 This is a partial structural schematic diagram of the mobility scooter according to an embodiment of the present utility model;

[0024] Explanation of reference numerals in the attached figures:

[0025] Outer tube 1, first radial hole 11, inner tube 2, friction plate 21, boss 211, mounting hole 22, locking assembly 3, sleeve 31, second radial hole 311, annular step 312, handle 32, eccentric shaft 321, pressure block 33, groove 331, arc-shaped contact surface 332, elastic pressure plate 34, pin 35, handle 4. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0027] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0028] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0029] The following is for reference. Figure 1-6 The implementation method of the telescopic tube locking mechanism proposed in the embodiments of this utility model will be described in detail.

[0030] According to an embodiment of the present utility model, the telescopic tube locking mechanism includes: an outer tube 1, an inner tube 2, and a locking component 3;

[0031] The outer tube 1 has a first radial hole 11. The locking assembly 3 includes a sleeve 31, a handle 32, and a pressure block 33. The sleeve 31 is simultaneously fitted onto the outer circumference of the outer tube 1 and the inner tube 2. The sleeve 31 includes a first fitting portion that matches the outer wall of the outer tube 1, a second fitting portion that matches the outer wall of the inner tube 2, and a second radial hole 311 that communicates with the first radial hole 11. An annular step 312 is formed between the first fitting portion and the second fitting portion. The pressure block 33 is movably disposed within the second radial hole 311. The pressure block 33 is provided with an elastic pressure plate 34. The handle 32 is swayably connected to the sleeve 31. The handle 32 is provided with a plate for engaging the elastic pressure plate 34. The eccentric shaft 321 is eccentrically contacted by the disc 34. Friction disc 21 is provided on the outer wall of the inner tube 2. The handle 32 is used to drive the eccentric shaft 321 to eccentrically contact the pressure block 33 to squeeze or release the pressure block 33. When squeezing, the pressure block 33 drives the elastic pressure disc 34 to move closer to the inner tube 2. The elastic pressure disc 34 pushes against the inner tube 2, so that the friction disc 21 contacts and squeezes against the inner wall of the outer tube 1, thereby locking the inner tube 2. When releasing, the elastic pressure disc 34 releases the push against the inner tube 2, so that the inner tube 2 is in a retractable adjustment state. When the upper end of the friction disc 21 abuts against the annular step 312, the inner tube 2 is in the extreme extension state.

[0032] In other words, the inner tube 2 is telescopically inserted into the outer tube 1. The two are connected synchronously via a first and second sleeve with different inner diameters on the sleeve 31. The inner wall of the first sleeve of the sleeve 31 fits against the outer wall of the outer tube 1, and the inner wall of the second sleeve fits against the outer wall of the inner tube 2, ensuring that the inner tube 2 remains coaxial with the outer tube 1 and does not shift left or right or tilt up or down during telescopic sliding. Friction plates 21 are pre-installed on the outer wall of the inner tube 2, and elastic pressure plates 34 are fixed on the pressure block 33. Thus, the contact between the inner and outer tubes 1 is entirely connected through these two layers of friction plates 21. During telescopic adjustment, the inner tube 2 slides inside the outer tube 1 with the friction plates 21, preventing direct friction between the inner tube 2 and the outer tube 1. When adjusted to the correct position, the inner tube 2 can be adjusted by turning... The handle 32 is moved, causing the eccentric shaft 321 to rotate eccentrically. The eccentric shaft 321 makes eccentric contact with the pressure block 33 in the second radial hole 311, pushing the pressure block 33. The side of the pressure block 33 facing the inner tube 2 is provided with an elastic pressure plate 34. The elastic pressure plate 34 presses against the outer wall of the inner tube 2, so that the friction plate 21 on the inner tube 2 makes contact and compression with the inner wall of the outer tube 1. The inner tube 2 is locked by the friction force generated by the compression between the elastic pressure plate 34 and the inner tube 2, and the friction force generated by the compression between the friction plate 21 and the outer tube 1. This avoids the scratching of the outer surface of the inner tube 2 and the inner surface of the outer tube 1 caused by the existing hard contact locking method. It can also make the locking tighter with the elasticity of the elastic pressure plate 34, and at the same time, it can further buffer the compression stress and protect the inner tube 2 from damage due to excessive pressure. Moreover, when the inner tube 2 is pulled outward to its longest length, the upper end of the friction plate 21 will abut against the annular step 312 of the sleeve 31, preventing the inner tube 2 from being completely pulled out of the outer tube 1, thus ensuring the safety of the entire telescopic locking mechanism.

[0033] The handle 32 can utilize the self-locking angle principle of the eccentric shaft 321 to enable it to have a self-locking function. The inner tube 2 and outer tube 1 can be made of metal or carbon fiber. The cross-sections of the inner tube 2 and outer tube 1 can be matched with circles or rectangular shapes. The elastic pressure plate 34 and friction plate 21 can be connected to the pressure block 33 and inner tube 2 by bonding, locking, or snapping. The pressure block 33 and inner tube 2 can be provided with mounting grooves that match the elastic pressure plate 34 and friction plate 21. The elastic pressure plate 34 can be made of silicone or rubber, and the friction plate 21 can be made of PA6 nylon or PEEK. Of course, the friction plate 21 can also be made of the same material as the elastic pressure plate 34. When the elastic pressure plate 34 releases the pressure on the inner tube 2, the elastic pressure plate 34 is in a free state. The elastic pressure plate 34 and the inner tube 2 can only contact each other without compression, or they can not contact each other. The outer tube 1 can be the outer rudder tube of the mobility scooter, and the inner tube 2 can be the inner rudder tube of the mobility scooter.

[0034] Thus, by simultaneously fitting the outer tube 1 and the inner tube 2 with the sleeve 31, the inner tube 2 can extend and retract within the outer tube 1 without contact. When the handle 32 swings, its eccentric structure drives the elastic pressure plate 34 to move. The elastic pressure plate 34 elastically compresses and increases the friction with the inner tube 2, while simultaneously pushing the inner tube 2 so that the friction plate 21 on the outer wall compresses against the inner wall of the outer tube 1, generating friction. The two work together to achieve stable locking of the inner tube 2. The friction plate 21 can prevent the inner tube 2 from directly contacting the outer tube 1 to reduce wear, and its contact with the sleeve 31 can prevent the inner tube 2 from detaching. This mechanism is easy to operate and securely fixed.

[0035] Optionally, there are two friction plates 21, arranged in a triangular pattern with the elastic pressure plate 34. Understandably, the triangular arrangement of the two friction plates 21 and the elastic pressure plate 34 on the outer peripheral wall of the inner tube 2 facilitates the formation of three friction points on the outer peripheral wall of the inner tube 2, making the locking of the inner tube 2 more secure. The cross-sections of the inner tube 2 and the outer tube 1 can be approximately isosceles trapezoidal in shape, with rounded corners. The two friction plates 21 are positioned at the rounded corners of the longer base, and the elastic pressure plate 34 is positioned on the outer side of the shorter base.

[0036] Optionally, the outer tube 1 and inner tube 2 are made of carbon fiber. Understandably, carbon fiber possesses the core advantages of being lightweight and high-strength. Applying it to the outer tube 1 and inner tube 2 can significantly reduce the overall weight of the telescopic locking mechanism, making it particularly suitable for devices like mobility scooters that require high portability, facilitating user transport and storage. Simultaneously, carbon fiber's tensile and flexural strength are superior to most metal materials, enabling it to withstand vibrations, impacts, and compressive forces during scooter use, preventing tube deformation or breakage after prolonged use and extending the mechanism's lifespan. Furthermore, carbon fiber exhibits excellent corrosion resistance, resisting moisture and dust corrosion during outdoor use, eliminating the need for additional rust prevention treatment. Its high surface smoothness reduces resistance when sliding with the friction plate 21, allowing for smoother telescopic adjustment of the inner tube 2, improving user operation, and solving the problems of heavy weight, easy corrosion, and high sliding resistance associated with traditional metal tubes. The elastic pressure plate 34 and the friction plate 21 have a dual function of buffering and isolation, which can give full play to the advantages of carbon fiber's "lightweight and high strength" and precisely make up for its "weak shear strength" defect, so that the telescopic tube locking mechanism can achieve the optimal balance between lightweight, durability and safety.

[0037] Optionally, the elastic pressure plate 34 and the pressure block 33 are fixed together by adhesive. Understandably, adhesive bonding eliminates the need for screw holes, slots, or other mechanical connection structures on the pressure block 33 or the elastic pressure plate 34, preserving the structural integrity of the pressure block 33 to the greatest extent possible while maintaining the elastic properties of the elastic pressure plate 34. This ensures that the friction plate 21 can deform normally to conform to the outer wall of the inner tube 2 during locking. Furthermore, adhesive bonding allows for surface contact fixing, increasing the contact area between the elastic pressure plate 34 and the pressure block 33. When the eccentric shaft 321 presses against the pressure block 33, the elastic pressure plate 34 will not shift or fall off, ensuring the stability of friction during locking. This method is simple to operate, has high assembly efficiency, and is more adaptable to flexible friction plates 21 such as silicone and rubber. It prevents localized stress concentration and cracking of the friction plate 21 caused by mechanical connections such as screw fastening, further extending the service life of the elastic pressure plate 34.

[0038] Furthermore, a boss 211 is provided on the inner side of the friction plate 21, and a mounting hole 22 is provided on the inner tube 2 corresponding to the position of the boss 211. The boss 211 and the mounting hole 22 are engaged. Understandably, the engagement of the boss 211 and the mounting hole 22 firstly achieves precise positioning of the friction plate 21 and the inner tube 2, avoiding lateral or vertical displacement of the friction plate 21 during installation, ensuring that the friction plate 21 can accurately contact the inner wall of the outer tube 1 or abut against the annular step 312 of the sleeve 31, thus ensuring the reliability of the mechanism. Secondly, this mechanical locking structure can form a double fixation with adhesive bonding. Compared with simple adhesive bonding, it can significantly improve the connection strength between the friction plate 21 and the inner tube 2. Even under long-term exposure to the friction force of telescopic sliding, the squeezing force during locking, or the squeezing force at the limit of extension, the friction plate 21 will not fall off the inner tube 2. Furthermore, the engagement and disassembly of the boss 211 and the mounting hole 22 are convenient. During later maintenance, the old friction plate 21 can be removed and the new friction plate 21 can be replaced simply by pressing the boss 211, without damaging the structure of the inner tube 2. The boss 211 can be cylindrical, and two bosses 211 can be provided on each friction plate 21, with the two bosses 211 spaced apart along the axial direction.

[0039] Optionally, the handle 32 is swayably connected to the sleeve 31 via a pin 35. The sleeve 31 has a pivot hole corresponding to the position of the handle 32, and the pin 35 passes through the pivot hole, allowing the handle 32 to swing around the pin 35. Understandably, the pin 35 connection provides a stable fulcrum for the handle 32's swing, and its mature and reliable structure ensures the coaxiality of the handle 32 when rotating around the pin 35, preventing jamming, offset, or loosening during swing, thus improving the smoothness of user operation. The pivot hole on the sleeve 31 can be precision-machined to ensure positional accuracy, ensuring that the eccentric shaft 321 of the handle 32 can be accurately aligned with the pressure block 33 after installation. Furthermore, the pin 35 connection offers good disassembly; if the handle 32 or sleeve 31 is damaged, only the pin 35 needs to be pulled out to replace the damaged part individually, without needing to replace the entire locking assembly 3, reducing maintenance costs. The pin 35 is mounted on the eccentric shaft 321, thus utilizing the lever principle to increase the driving force of the eccentric shaft 321.

[0040] Optionally, the pressure block 33 is provided with a groove 331, and the elastic pressure plate 34 is disposed in the groove 331. The groove 331 provides a space for the elastic pressure plate 34 to be accommodated and limited, preventing the elastic pressure plate 34 from lateral displacement on the pressure block 33, ensuring that the friction plate 21 is always in contact with the corresponding position of the outer wall of the inner tube 2 when locked, and ensuring the accurate application point of the extrusion force. The side wall of the groove 331 can form a lateral constraint on the elastic pressure plate 34. When the eccentric shaft 321 presses the pressure block 33 or the pressure block 33 is reset, the elastic pressure plate 34 will not be tilted due to the force, ensuring the stability of its elastic deformation direction, thereby ensuring uniform extrusion force when locked and avoiding damage to the inner tube 2 due to excessive local pressure. Furthermore, after the elastic pressure plate 34 is embedded in the groove 331, the outer surface of the pressure block 33 can remain flat, preventing the elastic pressure plate 34 from protruding from the surface of the pressure block 33 and being damaged by external impacts or scratches; at the same time, it can reduce unnecessary friction between the elastic pressure plate 34 and the inner wall of the sleeve 31, extending the service life of the elastic pressure plate 34; with the help of adhesive bonding, the groove 331 can also increase the contact area between the friction plate 21 and the pressure block 33, further improving the connection firmness. Among them, the friction surface of the elastic pressure plate 34 protrudes from the top surface of the groove 331.

[0041] Optionally, the pressure block 33 has an arc-shaped contact surface 332 on the side facing the eccentric shaft 321, the contour of which matches the outer circumferential contour of the eccentric shaft 321. Understandably, the matching of the arc-shaped contact surface 332 with the outer circumferential contour of the eccentric shaft 321 changes the contact method from point or line contact to surface contact, significantly increasing the contact area. This disperses the pressure of the eccentric shaft 321 on the pressure block 33, preventing damage such as dents or cracks caused by localized stress concentration, and extending the service life of the pressure block 33. Furthermore, the arc-shaped contact surface 332 guides the relative rotation between the eccentric shaft 321 and the pressure block 33 more smoothly, reducing resistance when swinging the handle 32, preventing jamming, and improving the user's operating feel. During the rotation of the eccentric shaft 321, the arc-shaped contact surface 332 also ensures that the two maintain stable contact at all times, preventing power transmission interruption due to poor contact and avoiding locking failure.

[0042] In addition, this utility model also proposes a mobility scooter, which includes a telescopic tube locking mechanism. Understandably, for example, the height of the handlebar stem and seat support rod can be adjusted to suit the needs of users of different heights. The telescopic tube locking mechanism of this utility model can be directly applied to these adjustment parts, achieving the core functions of one-button adjustment and stable locking. Since this mechanism only requires swinging the handle 32 to lock and unlock, it is easy to operate and greatly improves the usability of the mobility scooter. Users can quickly adjust the height without tools. When locked, it achieves double friction locking through the elastic pressure plate and friction plate 21, ensuring a secure fixation and preventing the adjustment parts from loosening when the mobility scooter is in motion, turning, or on bumpy roads, thus guaranteeing driving stability and safety. Meanwhile, the mechanism uses friction plates 21 to prevent direct contact between the inner tube 2 and the outer tube 1, reducing wear and extending the service life of the scooter's adjustment components. Furthermore, the mechanism features an anti-detachment design when the inner tube 2 is fully extended, achieved by the friction plates 21 abutting against the annular step 312. This prevents the inner tube 2 from detaching from the outer tube 1 during user adjustment, further enhancing the scooter's safety and addressing the problems of complex operation, easy wear, and insufficient safety in traditional scooter adjustment mechanisms. The inner tube 2 is connected to the scooter's handlebars 4, and the outer tube 1 is connected to the scooter's front fork.

[0043] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0045] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0047] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0048] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A telescopic tube locking mechanism, characterized in that, include: Outer tube, inner tube, and locking assembly; The outer tube has a first radial hole. The locking assembly includes a sleeve, a handle, and a pressure block. The sleeve is simultaneously fitted onto the outer circumference of both the outer and inner tubes. The sleeve includes a first fitting portion that matches the outer wall of the outer tube, a second fitting portion that matches the outer wall of the inner tube, and a second radial hole communicating with the first radial hole. An annular step is formed between the first and second fitting portions. The pressure block is movably disposed within the second radial hole and has an elastic pressure plate. The handle is swayably connected to the sleeve and has a feature for eccentric contact with the elastic pressure plate. An eccentric shaft is provided, and a friction plate is provided on the outer wall of the inner tube. The handle is used to drive the eccentric shaft to make eccentric contact with the pressure block to squeeze or release the pressure block. When squeezing, the pressure block drives the elastic pressure plate to move closer to the inner tube. The elastic pressure plate pushes against the inner tube, so that the friction plate contacts and squeezes the inner wall of the outer tube, thereby locking the inner tube. When releasing, the elastic pressure plate releases its push against the inner tube, so that the inner tube is in a retractable adjustment state. When the upper end of the friction plate abuts against the annular step, the inner tube is in the extreme extension state.

2. The telescopic tube locking mechanism as described in claim 1, characterized in that, The friction pads are two in number, and the two friction pads and the elastic pressure pad are arranged in a triangular pattern.

3. The telescopic tube locking mechanism as described in claim 1, characterized in that, The outer tube and the inner tube are made of carbon fiber.

4. The telescopic tube locking mechanism as described in claim 1, characterized in that, The elastic pressure plate and the pressure block are bonded and fixed together with glue.

5. The telescopic tube locking mechanism as described in claim 2, characterized in that, The friction plate has a boss on its inner side, and the inner tube has a mounting hole corresponding to the position of the boss. The boss and the mounting hole are engaged in a locking fit.

6. The telescopic tube locking mechanism as described in claim 1, characterized in that, The handle is oscillatingly connected to the sleeve via a pin. The sleeve has a pivot hole corresponding to the position of the handle, and the pin passes through the pivot hole so that the handle can swing around the pin.

7. The telescopic tube locking mechanism as described in claim 4, characterized in that, The pressure block has a groove, and the elastic pressure plate is disposed in the groove.

8. The telescopic tube locking mechanism as described in claim 1, characterized in that, The pressure block has an arc-shaped contact surface on the side facing the eccentric shaft, and the contour of the arc-shaped contact surface is adapted to the outer circumferential contour of the eccentric shaft.

9. A mobility scooter, characterized in that, Includes the telescopic tube locking mechanism as described in any one of claims 1-8.

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