Walking stick with adjustable height

Abstract

The height-adjustable walking stick mainly relates to the technical field of life auxiliary equipment, and comprises a handle, an inner pipe and an outer pipe, the inner pipe and the outer pipe are in a hollow state, the inner pipe is slidably mounted in the outer pipe, a mounting cavity is formed in the handle, one end of the inner pipe is mounted in the mounting cavity, a conical surface sleeve is mounted at the other end of the inner pipe, an adjusting rod is mounted in the inner pipe, and the adjusting rod is connected with the inner pipe. The handle is provided with an operation cavity communicated with the installation cavity, an automatic reset wedge-shaped structure is installed in the operation cavity and provided with a wedge face, one end of the adjusting rod abuts against the wedge face, a pull rod is installed at the other end of the adjusting rod, and the pull rod penetrates through the conical surface sleeve and is provided with a radial telescopic supporting structure. An elastic reset piece is arranged between the pull rod and the conical surface sleeve in a sleeved mode, and the radial telescopic supporting structure is pressed on the conical surface of the conical surface sleeve and the inner wall of the outer pipe through the elastic reset piece. The problem that the user experience is affected due to the fact that the height adjusting mode of an existing walking stick is not convenient enough is solved.

Description

Technical Field

[0001] This application relates to the technical field of assistive living devices, and in particular to a height-adjustable cane. Background Technology

[0002] As a common assistive walking tool, canes are widely used in daily life, medical rehabilitation, and outdoor sports. Traditional canes are usually designed with a fixed length, which cannot be adjusted according to the user's height, usage scenario, or terrain changes, resulting in poor comfort and even increasing the risk of falls due to unsuitable height.

[0003] Currently, there are several ways to adjust the height of a walking stick, including telescopic sleeve type adjustment which adjusts the height by sliding the inner and outer sleeves relative to each other and locking them with spring pins, buckles or knobs; threaded screw type adjustment which adjusts the height in sections by threaded connection; and elastic locking type adjustment which relies on the cooperation of elastic buttons and preset holes for fixation.

[0004] However, telescopic sleeve-type adjustment is prone to wear and tear on the locking mechanism after prolonged use, leading to loosening or accidental retraction of the cane, posing a safety hazard. While threaded screw-type adjustment offers better stability, the adjustment process is cumbersome, and the threads are easily contaminated with dirt or rust, affecting its lifespan. Elastic locking adjustment has limited adjustment levels, making it difficult to achieve precise height adaptation, especially in complex terrain. Furthermore, all of the above cane height adjustment methods are cumbersome, inconvenient to operate, and result in a poor user experience. Summary of the Invention

[0005] To address the problem that current height adjustment methods for walking sticks are not convenient enough and result in a poor user experience, this application provides a height-adjustable walking stick.

[0006] This application provides a height-adjustable walking stick, which adopts the following technical solution:

[0007] A height-adjustable walking stick includes a handle and a hollow inner tube and outer tube. The inner tube is slidably installed in the outer tube. The handle has a mounting cavity. One end of the inner tube is fixedly installed in the mounting cavity, and the other end of the inner tube is fixedly installed with a conical sleeve. An adjusting rod is slidably installed in the inner tube along its length. The handle has an operating cavity, and the mounting cavity communicates with the operating cavity. An automatic reset wedge structure is slidably installed in the operating cavity. The automatic reset wedge structure has an inclined wedge surface facing the adjusting rod. The perpendicular line from the inclined wedge surface to the adjusting rod forms an obtuse angle with the reset direction of the automatic reset wedge structure. One end of the adjusting rod abuts against the inclined wedge surface. The other end of the adjusting rod is fixedly installed with a pull rod. The pull rod passes through the conical sleeve and is fixedly installed with a radial telescopic support structure. An elastic reset member is sleeved between the pull rod and the conical sleeve. The elastic reset member presses the radial telescopic support structure against the conical surface of the conical sleeve and the inner wall of the outer tube.

[0008] By adopting the above technical solution, users can press the automatic reset wedge structure to move the adjusting rod along the length of the inner tube away from the handle, thus moving the pull rod. During the movement of the pull rod, the elastic reset component is compressed, causing the radial telescopic support structure to move. This separates the radial telescopic support structure from the conical surface of the conical sleeve and the inner wall of the outer tube, enabling the cane to be quickly unlocked. At this time, the inner and outer tubes can slide relative to each other to adjust the overall height, meeting the needs of different scenarios and users. When the automatic reset wedge structure is released, the wedge surface no longer presses against the adjusting rod, the elastic reset component recovers its deformation, and the pull rod and adjusting rod move towards the handle to return to their original positions. This allows the radial telescopic support structure to be pressed back against the conical surface of the conical sleeve and the inner wall of the outer tube, forming a stable locking state. This effectively prevents the cane from loosening or accidentally slipping during use, improving the safety and reliability of the cane. This design is not only easy to operate but also allows for precise height adjustment, enhancing the user experience.

[0009] Preferably, the outer wall of the conical sleeve is provided with an annular groove, and a damper is embedded in the annular groove, the outer wall of the damper being in contact with the inner wall of the outer tube.

[0010] By adopting the above technical solution, the damper increases the friction between the conical sleeve and the inner wall of the outer tube, thereby improving the stability of the cane after height adjustment and effectively preventing the cane from slipping or loosening due to accidental vibration or impact. The annular groove design provides installation space for the damper, ensuring its secure embedding in the conical sleeve while avoiding additional burden on the overall structure. This design significantly improves safety and reliability while maintaining the flexibility of cane height adjustment.

[0011] Preferably, the inclined wedge elastic reset structure includes a wedge, a pressing block, and an elastic element. One end of the wedge is fixedly installed on the pressing block, and the elastic element is sleeved on the wedge. A limiting groove is formed on the wedge along its axial direction. The handle is provided with a positioning hole matching the limiting groove at the operation groove. A positioning rod is fixedly installed in the positioning hole. The positioning rod passes through the positioning hole and the sliding groove to fix the position of the wedge in the operation cavity. The elastic element is movably sleeved on the wedge at the position between the pressing block and the positioning rod.

[0012] By adopting the above technical solution, the wedge, pressing block, and elastic element in the inclined wedge elastic reset structure work together, allowing users to easily loosen or lock the inner and outer tubes by pressing the pressing block, making operation simple. The design of the limiting groove and positioning rod ensures that the wedge is fixed in position within the operating cavity, avoiding adjustment failures caused by wedge displacement and improving structural reliability. The elastic element ensures that the pressing block automatically resets after release, thereby achieving rapid locking of the cane height and enhancing safety and comfort. Simultaneously, the cooperation between the positioning rod and the limiting groove limits the movement direction of the wedge, ensuring that the wedge does not deviate or tilt during movement.

[0013] Preferably, the operating cavity includes a first cavity, a second cavity, and a third cavity from the outside to the inside of the handle. The first cavity, the second cavity, and the third cavity are arranged in an inverted stepped shape. The pressing block is slidably installed in the first cavity. One end of the elastic element abuts against the bottom of the second cavity, and the other end of the elastic element abuts against the pressing block. The positioning hole is opened at the location of the handle in the third cavity.

[0014] By adopting the above technical solution, the cane's operating cavity is designed as an inverted stepped first cavity, a second cavity, and a third cavity. This allows the pressing block to slide stably within the first cavity, while the two ends of the elastic element abut against the bottom of the second cavity and the pressing block, respectively, forming a reliable elastic support structure. This design not only optimizes the internal space layout but also improves the working stability of the wedge-shaped elastic reset structure, thereby ensuring smooth operation and reliable locking during cane height adjustment. Furthermore, the positioning hole located in the third cavity further enhances the structural compactness and assembly precision, effectively preventing loosening or misalignment of components and improving the overall service life and safety of the cane.

[0015] Preferably, the radial telescopic support structure includes a retainer and balls mounted on the retainer, and the balls on the retainer are pressed between the conical surface of the conical sleeve and the inner wall of the outer tube by an elastic reset member.

[0016] By adopting the above technical solution, the cooperation between the cage and the ball bearings allows the ball bearings to form a stable support between the conical surface of the conical sleeve and the inner wall of the outer tube, thereby ensuring the cane is firmly locked at different heights and avoiding safety hazards caused by accidental slippage. The elastic reset component keeps the ball bearings pressed between the conical surface and the inner wall of the outer tube, increasing friction and improving the cane's anti-slip performance, further ensuring the user's safety. The design of the ball bearings reduces the frictional resistance of the contact surface, making the operation smoother when adjusting the height, while also extending the service life of the cane.

[0017] Preferably, an auxiliary block is fixedly installed on the adjusting rod, and the auxiliary block is slidably connected to the inner wall of the inner tube.

[0018] By adopting the above technical solution, the auxiliary block on the adjusting rod is slidably connected to the inner wall of the adjusting cavity, which can effectively reduce the frictional resistance of the adjusting rod during the sliding process and improve the smoothness of the cane height adjustment. At the same time, the setting of the auxiliary block can also enhance the fitting accuracy between the adjusting rod and the adjusting cavity, prevent the adjusting rod from shifting or getting stuck during the sliding process, thereby improving the overall stability and reliability of the cane.

[0019] Preferably, a connector is detachably fixed to one end of the outer tube near the handle. The connector includes a connecting sleeve and a supporting sleeve. An clearance hole is provided on the side wall of the connecting sleeve, and an elastic piece is fixed at the clearance hole. A snap-fit ​​protrusion is fixedly installed on the elastic piece. A snap-fit ​​hole is provided on the outer tube at a position corresponding to the snap-fit ​​protrusion. The supporting sleeve is detachably installed on the side of the connecting sleeve near the handle. The side of the supporting sleeve away from the connecting sleeve is bent radially to form an end cap. The end cap is slidably connected to the outer wall of the inner tube.

[0020] By adopting the above technical solution, the elastic plate on the connecting sleeve and the snap-fit ​​protrusion cooperate with the snap-fit ​​hole on the outer tube to form a stable snap-fit ​​structure, ensuring the reliability of the connector during use. The end cap formed on the side of the support sleeve away from the connecting sleeve is slidably connected to the outer wall of the inner tube, further enhancing the stability between the inner and outer tubes. At the same time, it provides additional support and protection for the inner tube, preventing the inner tube from shifting and causing jamming or damage to the cane during the adjustment of the cane height.

[0021] Preferably, a bushing is fixedly installed on the outer wall of the inner tube, and the outer wall of the bushing is provided with a shoulder.

[0022] By adopting the above technical solution, the bushing configuration can improve the coaxiality and sliding stability between the inner and outer tubes, effectively reducing the swaying and offset during relative sliding. The shoulder configuration reduces the friction between the bushing and the inner wall of the outer tube.

[0023] Preferably, a non-slip hand rest is also fixedly installed on the handle.

[0024] By adopting the above technical solution, the anti-slip hand rest fixedly installed on the top surface of the handle can increase the friction between the user's palm and the handle, effectively preventing the cane from slipping off due to hand slippage, and improving the safety and stability of use.

[0025] Preferably, a base is fixedly installed at the end of the outer tube away from the handle.

[0026] By adopting the above technical solution, the base is fixedly installed at the bottom of the outer tube of the cane, which can effectively increase the contact area between the cane and the ground, improve the stability of the cane during use, reduce slipping caused by uneven or wet ground, and thus improve the user's walking safety.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. By combining the conical sleeve with the radial telescopic support structure, the clamping force generated by the elastic reset component is used to achieve a stable connection between the inner and outer tubes, effectively avoiding the problem of the cane loosening or unexpected retraction caused by wear of the locking mechanism after long-term use, and significantly improving the safety of use.

[0029] 2. The automatic reset wedge structure design makes the operation of the adjustment rod more convenient. Users can easily unlock the height lock state by simply pressing the press block, which solves the problem of cumbersome operation of traditional screw-type adjustment and reduces the impact of dirt or rust on the cane function.

[0030] 3. The tight fit between the conical sleeve and the inner wall of the outer tube, combined with the adjustable clamping force provided by the radial telescopic support structure, enables highly precise adjustment, breaking through the limitations of the limited adjustment range of the elastic locking type. Especially in complex terrain, it can better adapt to the needs of users and improve the applicability and comfort of the walking stick. Attached Figure Description

[0031] Figure 1 This is a structural diagram illustrating the overall structure in the embodiments of this application;

[0032] Figure 2 This is a cross-sectional schematic diagram illustrating the overall structure in the embodiments of this application;

[0033] Figure 3 yes Figure 2 An enlarged schematic diagram of part A in the middle;

[0034] Figure 4 This is a schematic diagram illustrating the direction of the force applied by the automatic reset wedge structure in the embodiments of this application;

[0035] Figure 5 This is an exploded view of the handle in an embodiment of this application;

[0036] Figure 6 yes Figure 2 Enlarged schematic diagram of part B in the middle;

[0037] Figure 7 yes Figure 2 An enlarged schematic diagram of section C;

[0038] Figure 8 This is a schematic diagram of the connector structure in an embodiment of this application;

[0039] Figure 9 This is an exploded view of the connector in an embodiment of this application.

[0040] Reference numerals: 1. Handle; 11. Operating cavity; 111. First cavity; 112. Second cavity; 113. Third cavity; 12. Mounting cavity; 13. Hand rest; 131. Positioning block; 14. Positioning hole; 15. Positioning groove; 2. Rod body; 21. Outer tube; 211. Snap-fit ​​hole; 22. Inner tube; 23. Bushing; 231. Shoulder; 31. Adjusting rod; 311. Steel ball; 312. Auxiliary block; 4. Automatic reset wedge structure; 41. Wedge block; 411. Inclined wedge surface; 42. Pressing block; 43. Elastic element; 44. Limiting groove; 45. Positioning rod; 51. Pull rod; 52. Conical sleeve; 521. Annular groove; 522. Damper; 53. Elastic reset element; 54. Radial telescopic support structure; 541. Cage; 5411. Cage seat; 5412. Snap cover; 542. Ball bearing; 55. Fixing nut; 6. Connecting element; 61. Connecting sleeve; 611. Clearance hole; 612. Elastic sheet; 613. Snap-fit ​​protrusion; 62. Support sleeve; 621. End cap; 7. Base. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1 -Appendix Figure 4 This application will be described in further detail.

[0042] This application discloses a height-adjustable walking stick.

[0043] Reference Figure 1 and Figure 2 A height-adjustable cane includes a handle 1 and a shaft 2. The shaft 2 includes a hollow inner tube 22 and an outer tube 21. The inner tube 22 is slidably installed in the outer tube 21. The handle 1 has a mounting cavity 12. One end of the inner tube 22 is fixedly installed in the mounting cavity 12, and the other end of the inner tube 22 is fixedly installed with a conical sleeve 52. The handle 1 also has an operating cavity 11 perpendicular to the mounting cavity 12. The mounting cavity 12 and the operating cavity 11 are connected. An automatic reset wedge structure 4 is slidably installed in the operating cavity 11. The automatic reset wedge structure 4 has an inclined wedge surface 411 facing the adjusting rod 31. (Refer to...) Figure 4 The wedge surface 411, pointing towards the adjusting rod 31, forms an obtuse angle with the reset direction of the automatic reset wedge structure 4. An adjusting rod 31 is slidably installed along the length of the inner tube 22. One end of the adjusting rod 31 abuts against the wedge surface 411, and the other end is fixedly fitted with a pull rod 51. The pull rod 51 passes through and slidably connects to the conical sleeve 52. An elastic reset element 53 is sleeved between the pull rod 51 and the conical sleeve 52. A radial telescopic support structure 54 is fixedly installed at the extended end of the pull rod 51 through the conical sleeve 52. Under the action of the elastic reset element 53, the radial telescopic support structure 54 is pressed between the conical surface of the conical sleeve 52 and the inner wall of the outer tube 21, thereby achieving relative fixation between the inner tube 22 and the outer tube 21, so that when the automatic reset wedge structure 4 is pressed... Under the action of the wedge surface 411, the adjusting rod 31 moves away from the handle 1 along the length of the inner tube 22. The adjusting rod 31 drives the radial telescopic support structure 54 to disengage from the conical surface of the conical sleeve 52 and the inner wall of the outer tube 21, so that the inner tube 22 and the outer tube 21 slide relative to each other to adjust the height of the cane. After the adjustment is completed, the automatic reset wedge structure 4 is released, and the wedge surface 411 no longer exerts a squeezing effect on the adjusting rod 31. The elastic reset member 53 restores its deformation, driving the pull rod 51 and the adjusting rod 31 to move closer to the handle 1 in the inner tube 22. This causes the radial telescopic support structure 54 to be pressed again against the conical surface of the conical sleeve 52 and the inner wall of the outer tube 21, thus locking the inner tube 22 and the outer tube 21 and preventing the cane from loosening or slipping during use, ensuring that the cane can be used normally.

[0044] Reference Figure 3 In this embodiment of the application, in order to reduce the friction between the adjusting rod 31 and the wedge surface 411, a steel ball 311 is fixedly installed at the abutment position between the adjusting rod 31 and the wedge surface 411. By abutting the wedge surface 411 with the steel ball 311, the contact area between the adjusting rod 31 and the wedge surface 411 is reduced.

[0045] Reference Figure 3 and Figure 5The automatic reset wedge structure 4 includes a wedge block 41, a pressing block 42, and an elastic element 43. The operating cavity 11 on the handle 1 includes a first cavity 111, a second cavity 112, and a third cavity 113 from the outside to the inside. The first cavity 111, the second cavity 112, and the third cavity 113 form a three-level radially tapering stepped nested cavity structure, that is, the diameter of the first cavity 111 is larger than that of the second cavity 112, and a stepped surface is formed at the transition between the first cavity 111 and the second cavity 112. The stepped surface is the bottom of the first cavity 111. The diameter of the second cavity 112 is larger than that of the third cavity 113. A stepped surface is formed at the transition between the second cavity 112 and the third cavity 113, which is the bottom of the second cavity 112. A wedge block 41 has an inclined wedge surface 411. The end of the wedge block 41 away from the inclined wedge surface 411 is fixed to the pressing block 42. The wedge block 41 passes through the first cavity 111, the second cavity 112 and the third cavity 113 in sequence and is slidably installed in the operating cavity 11. The pressing block 42 is located at the position of the first cavity 111 and is slidably installed in the first cavity. In body 111, elastic element 43 is sleeved between pressing block 42 and wedge block 41, and elastic element 43 is located at the position of first cavity 111 and second cavity 112, that is, one end of elastic element 43 abuts against pressing block 42, and the other end of elastic element 43 abuts against the step surface of transition between second cavity 112 and third cavity 113; a limiting groove 44 is formed on wedge block 41 along the length direction of wedge block 41, and when wedge block 41 is in a stationary state in operating cavity 11, limiting groove 44 is located at the position of third cavity 113. The handle 1 is located in the third cavity 113 and has a positioning hole 14 corresponding to the position of the limiting groove 44. A positioning rod 45 is detachably installed in the positioning hole 14. The positioning rod 45 passes through the positioning hole 14 and the limiting groove 44 to fix the position of the wedge 41 in the operating cavity 11, so as to prevent the wedge 41 from falling out of the operating cavity 11. At the same time, the cooperation between the positioning rod 45 and the limiting groove 44 can also guide the movement direction of the wedge 41 in the operating cavity 11, so as to avoid the wedge 41 from deviating in the operating cavity 11.

[0046] In this embodiment, to ensure that the pressing block 42 does not protrude from the surface of the handle 1 when the automatic reset wedge structure 4 is stationary in the operating cavity 11, the positioning rod 45 is located at the end of the limiting groove 44 near the inclined wedge surface 411, so as to fix the positioning rod 45 through the positioning hole 14. By abutting the positioning rod 45 against the limiting groove 44, the pressing block 42 of the automatic reset wedge structure 4 is prevented from being removed from the operating cavity 11 and protruding on the handle 1, thereby affecting the normal use and height adjustment operation of the cane.

[0047] Refer to Figure 2 and Figure 6An annular groove 521 is provided on the outer wall of the conical sleeve 52. A damper 522 is embedded in the annular groove 521. After the damper 522 is installed in the annular groove 521, the outer wall of the damper 522 contacts the inner wall of the outer tube 21 to enhance the friction between the inner tube 22 and the outer tube 21, and prevent the inner tube 22 and the outer tube 21 from becoming loose during use. When the user presses the automatic reset wedge structure 4, the automatic reset wedge structure 4 drives the adjusting rod 31 to move along the length direction of the inner tube 22. The outer tube 21 overcomes the friction of the damper 522 and moves along the length direction of the inner tube 22 to achieve the height adjustment of the cane.

[0048] Reference Figure 2 and Figure 6 The radial telescopic support structure 54 includes a retainer 541 and balls 542 mounted on the retainer 541. The retainer 541 has a mounting groove for the balls 542. The retainer 541 includes a retaining seat 5411 and a cover 5412. The retaining seat 5411 has a mounting groove for the balls 542, and the cover 5412 has a retaining groove for the balls 542. When the retaining seat 5411 and the cover 5412 cooperate to form the retainer 541, the mounting groove and the retaining groove cooperate to form a retaining cavity for the balls 542. The balls 542 are in contact with the mounting groove and the retaining groove and are relatively movable in the retaining cavity. That is, the balls 542 can be displaced in the retaining cavity but will not detach from the retaining cavity. A fixing nut 55 is fixedly installed at the end of the radial telescopic support structure 54 away from the conical sleeve. The fixing nut 55 enables the radial telescopic support structure 54 to be detachably connected to the tie rod 51, which facilitates maintenance, replacement and other operations.

[0049] Reference Figure 2 An auxiliary block 312 is fixedly installed on the adjusting rod 31. The auxiliary block 312 is slidably connected to the inner wall of the inner tube 22. The auxiliary block 312 can support the adjusting rod 31 in the inner tube 22. In order to reduce the friction between the auxiliary block 312 and the inner wall of the inner tube 22, a notch is provided on the side wall of the auxiliary block 312. The notch not only reduces the friction between the auxiliary block 312 and the inner wall of the inner tube 22, but also facilitates installation. During installation, the auxiliary block 312 can be clamped or pinched through the notch to facilitate the installation of the auxiliary block 312 and the adjusting rod 31.

[0050] Reference Figure 7 and Figure 8 A connector 6 is detachably installed at one end of the outer tube 21 near the handle 1. The connector 6 includes a connecting sleeve 61 and a supporting sleeve 62. The connecting sleeve 61 has at least one clearance hole 611, and an elastic piece 612 is fixedly installed at each clearance hole 611. Each elastic piece 612 has a snap-fit ​​protrusion 613 fixedly installed on the side near the outer tube 21. (Refer to...) Figure 9The outer tube 21 has corresponding snap-fit ​​holes 211 at the corresponding positions of each snap-fit ​​protrusion 613. The connection sleeve 61 is relatively fixed on the outer tube 21 through the cooperation of the snap-fit ​​protrusion 613 and the snap-fit ​​hole 211. After the connection sleeve 61 is fixed on the outer tube 21, the support sleeve 62 is detachably installed on the side of the outer tube 21 near the handle 1. The support sleeve 62 and the connection sleeve 61 can be fixed by threaded connection. The side of the support sleeve 62 away from the connection sleeve 61 is bent radially to form an end cap 621. The end cap 621 is slidably connected to the outer wall of the inner tube 22 to support the inner tube 22. When the inner tube 22 and the outer tube 21 move relative to each other, the end cap 621 can support the inner tube 22 and prevent the outer tube 21 from tilting when sliding along the inner tube 22.

[0051] Reference Figure 2 and Figure 6 A bushing 23 is fixedly installed on the outer wall of the inner tube 22, and a shoulder 231 is provided on the outer wall of the bushing 23. The bushing 23 is slidably connected to the inner wall of the outer tube 21 to form a support between the outer tube 21 and the inner tube 22 to prevent the outer tube 21 from shaking when it slides down. The outer cylindrical surface of the bushing 23 is provided with a shoulder 231, which contacts the inner wall of the outer tube 21 to reduce the friction between the bushing 23 and the inner wall of the outer tube 21.

[0052] Reference Figure 3 and Figure 5 A non-slip hand rest 13 is also fixedly installed on the handle 1. The non-slip hand rest 13 can be installed on the contact surface between the palm of the cane user and the handle 1 when holding the cane. The non-slip hand rest 13 can be installed by opening a positioning groove 15 on the handle 1, and a positioning block 131 is fixedly installed on the contact surface between the non-slip hand rest 13 and the handle 1. The position of the non-slip hand rest 13 on the handle 1 is fixed by the cooperation between the positioning block 131 and the positioning groove 15. The non-slip hand rest 13 can be fixed on the handle 1 by adhesive, or the non-slip hand rest 13 can be fixed on the handle 1 by interference fit between the positioning block 131 and the positioning groove 15.

[0053] Reference Figure 1 To prevent the outer tube 21 from directly contacting the ground during use, a base 7 is fixedly installed at the end of the outer tube 21 away from the handle 1. In this embodiment, the base 7 can be made of rubber and fixed to the outer tube 21 by sleeve. During use, the base 7 can prevent the inner tube 22 from making hard contact with the bottom surface, thereby enhancing the comfort of using the cane.

[0054] The implementation principle of this application embodiment is as follows:

[0055] When using the cane, if the user needs to adjust the height of the cane, they press the pressing block 42 of the automatic reset wedge structure 4 to move the wedge block 41 in the operating cavity 11. Under the action of the inclined wedge surface 411, the adjusting rod 31 moves away from the handle 1 along the length of the inner tube 22. The adjusting rod 31 drives the pull rod 51 to move, thereby driving the radial telescopic support structure 54 to move. During the movement of the radial telescopic support structure 54, as the taper of the conical sleeve 52 decreases, the ball bearing 542 will be displaced towards the center of the conical sleeve 52, thus no longer pressing against the inner wall of the conical sleeve 52 and the outer tube 21. The inner tube 22 and the outer tube 21 move relative to each other to achieve the height adjustment of the cane. After the height is determined, the user releases the automatic reset wedge structure 4. When pressed, the automatic reset wedge structure 4 returns to its original position with the cooperation of the elastic element 43 and the positioning rod 45. The inclined wedge surface 411 no longer exerts a squeezing force on the adjusting rod 31. At this time, the elastic reset element 53 restores its elastic deformation, thereby driving the pull rod 51 and the adjusting rod 31 to move along the length of the inner tube 22 towards the handle 1, and then driving the radial telescopic support structure 54 to move. During the movement of the radial telescopic support structure 54, as the taper of the conical sleeve 52 increases, the ball bearing 542 moves away from the center of the conical sleeve 52 under the outward expansion force of the conical surface, so that the ball bearing 542 is pressed again against the conical surface of the conical sleeve 52 and the inner wall of the outer tube 21, thereby locking the inner tube 22 and the outer tube 21 so that the cane can be used normally. In this embodiment, the height adjustment of the cane can be achieved simply by pressing the automatic reset wedge structure 4, which is simple, convenient and quick to operate, improving the applicability and comfort of the cane.

[0056] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A height-adjustable walking stick, characterized in that: The device includes a handle (1), a hollow inner tube (22), and an outer tube (21). The inner tube (22) is slidably installed in the outer tube (21). The handle (1) has an installation cavity (12). One end of the inner tube (22) is fixedly installed in the installation cavity (12), and the other end of the inner tube (22) is fixedly installed with a conical sleeve (52). An adjusting rod (31) is slidably installed in the inner tube (22) along its length. The handle (1) has an operating cavity (11), and the installation cavity (12) communicates with the operating cavity (11). An automatic reset wedge structure (4) is slidably installed in the operating cavity (11). The automatic reset wedge structure (4) is oriented towards... The adjusting rod (31) is provided with a wedge surface (411). The perpendicular line of the wedge surface (411) pointing to the direction of the adjusting rod (31) forms an obtuse angle with the reset direction of the automatic reset wedge structure (4). One end of the adjusting rod (31) forms an abutment fit with the wedge surface (411). The other end of the adjusting rod (31) is fixedly installed with a pull rod (51). The pull rod (51) passes through the conical sleeve (52) and is fixedly installed with a radial telescopic support structure (54). An elastic reset member (53) is sleeved between the pull rod (51) and the conical sleeve (52). The radial telescopic support structure (54) is pressed against the conical surface of the conical sleeve (52) and the inner wall of the outer tube (21) by the elastic reset member (53).

2. The height-adjustable walking stick according to claim 1, characterized in that: The outer wall of the conical sleeve (52) is provided with an annular groove (521), and a damper (522) is embedded in the annular groove (521). The outer wall of the damper (522) is in contact with the inner wall of the outer tube (21).

3. The height-adjustable walking stick according to claim 1, characterized in that: The automatic reset wedge structure (4) includes a wedge block (41) with an inclined wedge surface (411), a pressing block (42), and an elastic element (43). The end of the wedge block (41) away from the inclined wedge surface (411) is fixed to the pressing block (42). A limiting groove (44) is formed on the wedge block (41) along the axial direction of the wedge block (41). The handle (1) is located in the operating cavity (11) and has a positioning hole (14) corresponding to the position of the limiting groove (44). A positioning rod (45) is fixedly installed in the positioning hole (14) and the positioning rod (45) is slidably installed in the limiting groove (44). The elastic element (43) is movably sleeved on the wedge block (41) at the position between the pressing block (42) and the positioning rod (45).

4. The height-adjustable walking stick according to claim 3, characterized in that: The operating cavity (11) includes a first cavity (111), a second cavity (112), and a third cavity (113) arranged coaxially from the outside to the inside. The first cavity (111), the second cavity (112), and the third cavity (113) form a three-level radially tapering stepped nested cavity structure. The pressing block (42) is slidably installed in the first cavity (111). One end of the elastic element (43) abuts against the pressing block (42), and the other end of the elastic element (43) abuts against the step surface at the transition between the second cavity (112) and the third cavity (113). When the wedge block (41) is in a stationary state in the operating cavity (11), the limiting groove (44) is located at the position of the third cavity (113).

5. The height-adjustable walking stick according to claim 1, characterized in that: The radial telescopic support structure (54) includes a retainer (541) and balls (542) mounted on the retainer (541). The balls (542) on the retainer (541) are pressed between the conical surface of the conical sleeve (52) and the inner wall of the outer tube (21) by the elastic reset member (53).

6. The height-adjustable walking stick according to claim 1, characterized in that: An auxiliary block (312) is fixedly installed on the adjusting rod (31), and the auxiliary block (312) is slidably connected to the inner wall of the inner tube (22).

7. The height-adjustable walking stick according to claim 1, characterized in that: The outer tube (21) is detachably fixed with a connector (6) at one end near the handle (1). The connector (6) includes a connecting sleeve (61) and a supporting sleeve (62). At least one clearance hole (611) is provided on the side wall of the connecting sleeve (61). An elastic piece (612) is fixed at any of the clearance holes (611). A snap-fit ​​protrusion (613) is fixedly installed on any of the elastic pieces (612). The outer tube (21) is provided with a snap-fit ​​hole (211) at the corresponding position of any of the snap-fit ​​protrusions (613). The supporting sleeve (62) is detachably installed on the side of the connecting sleeve (61) near the handle (1). The side of the supporting sleeve (62) away from the connecting sleeve (61) is bent radially to form an end cap (621). The end cap (621) is slidably connected to the outer wall of the inner tube (22).

8. A height-adjustable walking stick according to claim 1, characterized in that: A bushing (23) is fixedly installed on the outer wall of the inner tube (22), and a shoulder (231) is provided on the outer wall of the bushing (23).

9. A height-adjustable walking stick according to claim 1, characterized in that: A non-slip hand rest (13) is also fixedly installed on the handle (1).

10. A height-adjustable walking stick according to claim 1, characterized in that: A base (7) is fixedly installed at the end of the outer tube (21) away from the handle (1).

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