A self-balancing shock-absorbing crutch

Abstract

The utility model discloses a self -balancing shock -absorbing walking stick, including short -tube, central axis core and claw base, the short -tube bottom end's hemispherical bottom end head center is equipped with the vertical through -going middle part through axle hole, the hemispherical bottom end head bottom is with the hemispherical top concave hole rotation connection of claw base top, the central axis core top is connected in the short -tube inside through upper nut subassembly, the central axis core bottom is connected in the lower concave hole of claw base through lower nut subassembly, be equipped with the inverted conical spring of sleeve connection in the lower part of central axis core between lower nut subassembly top and inverted conical male part, the lower part through axle hole diameter is greater than the central axis core diameter. Through being equipped with the inverted conical spring of sleeve connection in the lower part of central axis core between lower nut subassembly top and inverted conical male part and the design of lower part through axle hole diameter greater than central axis core diameter, limit walking stick to one side and lean the range, walking stick leans after reset more easily, effectively prolongs inverted conical spring's life, avoided the possibility that inverted conical spring produced fracture.

Description

Technical Field

[0001] This utility model relates to the field of cane technology, and in particular to a self-balancing shock-absorbing cane. Background Technology

[0002] 1. Existing Chinese patent document publication number: CN222533603U, discloses an adjustable height and angle cane, including a cane body and a stabilizing component. The stabilizing component is disposed inside the cane body and is used to stabilize the cane body. The stabilizing component includes a circular cover with a circular groove inside. A corrugated sleeve is fixedly connected to the bottom of the circular cover, and a base plate is fixedly connected to the bottom of the corrugated sleeve. A fixing post is fixedly connected to the center of the top of the base plate, and a ball is fixedly connected to the top of the fixing post. The top of the ball extends into the circular groove and is rotatably connected to the groove. Return springs are symmetrically fixed between the bottom of the circular cover and the top of the base plate. The return springs and the corrugated sleeve can provide a certain degree of cushioning and shock absorption during use, reducing the pressure on the user's hands.

[0003] The aforementioned adjustable height and angle cane, with its return spring and corrugated sleeve design, can only provide a certain degree of cushioning and shock absorption during use, reducing the pressure on the user's hands. However, it cannot achieve the function of automatic reset of the cane body. Furthermore, during use, the angle of rotation and bending of the return spring caused by the cane body is uncertain, and there is no effective limit protection device for the return spring. With long-term use, there is a possibility that the return spring may break due to excessive bending, causing safety problems.

[0004] 2. Existing Chinese patent document publication number: CN203969491U discloses a self-balancing shock-absorbing cane, including a base and a support rod. The lower end of the support rod is provided with a rotating ball head, and the base is provided with a ball groove. The ball head rotates under the constraint of the ball groove. A base bolt through hole is provided at the center of the ball groove of the base, and a bolt through hole is also provided at the center of the ball head of the support rod. The bolt starts from the lower end of the base, passes through the bolt through holes of the base and the support rod from bottom to top, and is sleeved with a drive spring. The nut is connected to the bolt and abuts against the upper end of the drive spring. The lower end of the drive spring abuts against the end of the ball head. The bolt rotates with the support rod around the center of the ball head. After the bolt rotates, the abutment position of the bolt head and the back of the ball groove gradually deviates from the bolt through hole of the ball groove and increases the distance from the center of the ball, so that the nut and the ball head generate greater compression on the drive spring. When the support rod is released, the bolt head returns to the area around the bolt through hole of the ball groove under the action of the restoring force of the drive spring, thereby driving the support rod back to its original position.

[0005] The force that drives the support rod to return to its original position in the aforementioned self-balancing shock-absorbing cane comes from the pressure exerted by the nut and ball head on the drive spring as the contact position between the bolt head and the back of the ball groove gradually deviates from the bolt hole of the ball groove after the release bolt rotates. The drive spring is installed on the upper part of the ball head, that is, above the pivot point. The drive spring stores the return spring force by the pressure generated by the displacement of the contact point between the bolt head and the back of the ball groove. The return torque is long, the force transmission effect is poor, and the user experience is not good. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a self-balancing shock-absorbing cane. The cane tilting return spring is designed below the pivot point to reduce the length of the return torque. Simultaneously, the shape of the cane tilting return spring and the back of the ball groove are designed as an inverted cone, making it easier for the cane to return to its original tilted position.

[0007] A self-balancing shock-absorbing cane includes a short tube, a central shaft, and a claw seat. The bottom end of the short tube is hemispherical, and a vertically penetrating central shaft hole is provided at the center of the hemispherical bottom end. A hemispherical top recess is provided in the center of the top of the claw seat. The bottom of the hemispherical bottom end is rotatably connected to the hemispherical top recess of the claw seat. A vertically oriented lower shaft hole is provided at the center of the hemispherical top recess. A lower recess is provided inward from the center of the bottom of the claw seat. The inner top wall of the lower recess... The central shaft is an inverted conical protrusion with a lower through-hole in the middle. The central shaft passes through the inside of the short tube, the middle through-hole, and the lower through-hole in sequence. The top of the central shaft is connected to the inside of the short tube via an upper nut assembly, and the bottom of the central shaft is connected to the recessed hole of the claw seat via a lower nut assembly. An inverted conical spring is provided between the top of the lower nut assembly and the inverted conical protrusion, and is sleeved on the lower part of the central shaft. The diameter of the lower through-hole is larger than the diameter of the central shaft.

[0008] Further, in the preferred technical solution: a protruding limiting ring extends from the upper outer wall of the hemispherical bottom end, and a limiting ring groove is formed between the limiting ring and the top of the claw seat, limiting the range in which the short tube can tilt to one side relative to the claw seat.

[0009] Further, in the preferred technical solution: a step is provided in the middle of the top opening of the central through hole, and a core protrusion ring is provided in the middle section of the central core, which is correspondingly embedded and connected to the step.

[0010] Further, in the preferred technical solution: the short tube includes an upper short tube and a lower short tube, the lower short tube is inserted into the upper short tube, a shock-absorbing spring is installed in the tube hole between the upper and lower short tubes, the central shaft is inserted into the shock-absorbing spring, and the top of the central shaft is connected to the inner wall of the upper short tube through an upper nut assembly. When the shock-absorbing spring is compressed, the upper short tube can move up and down elastically relative to the lower short tube.

[0011] Further, in the preferred technical solution: the upper part of the upper short tube is provided with a rod hole, and the rod hole is detachably snapped into a vertical cane rod.

[0012] A further preferred technical solution: the bottom of the claw body of the claw seat is fixedly connected with a plastic anti-slip pad for anti-slip.

[0013] A further preferred technical solution: the short tube can be tilted to one side by 0 to 35 degrees relative to the claw seat.

[0014] Further, in the preferred technical solution: the height of the groove of the limiting ring is 3 mm to 8 mm.

[0015] A further preferred technical solution: the opening of the recessed hole is fixedly covered with a lower cover.

[0016] A further preferred technical solution: the diameter of the lower through-hole is 10% to 30% larger than the diameter of the central core; this facilitates the cane stick to tilt and swing to one side through the central core, providing room for movement.

[0017] The beneficial effects of this self-balancing shock-absorbing cane are as follows: 1. The hemispherical bottom end and hemispherical top concave hole of this product form a spherical arc fit. After the short tube tilts to one side relative to the claw seat, the restoring force of the inverted conical spring assists the short tube to return to vertical self-balancing, thereby making the cane stick return to vertical self-balancing with the short tube. 2. By providing an inverted conical spring sleeved on the lower part of the central core between the top of the lower nut assembly and the inverted conical protrusion, and the design of the diameter of the lower through-hole being larger than the diameter of the central core, the range of tilting of the cane stick to one side is limited during use. The inverted conical spring makes it easier to return the cane stick to its original position after tilting, and also effectively extends the service life of the inverted conical spring, while effectively avoiding the possibility of breakage of the inverted conical spring. 3. By forming a limiting ring groove between the limiting protrusion and the top of the claw seat, the range of tilting of the cane stick to one side is further precisely limited, providing the user with safer and more stable support. 3. By creating a step in the middle of the top hole of the central shaft hole and a shaft core protruding in the middle section with a corresponding embedded ring, the lateral contact area between the central shaft core and the hemispherical bottom end is increased, making their lateral movement more synchronized and improving the feel. At the same time, it can reduce the wear between the hemispherical bottom end and the central shaft core during movement and extend the product's service life. Attached Figure Description

[0018] Figure 1 A perspective view of the product of this utility model with a vertical cane stick attached to the rod hole;

[0019] Figure 2 The left view shows the rod hole of the product of this utility model with a vertical cane rod attached;

[0020] Figure 3 A three-dimensional front view of the cane head of this utility model product;

[0021] Figure 4 A three-dimensional inverted view of the cane head of this utility model product;

[0022] Figure 5 This is a cross-sectional view of the cane head of the present invention;

[0023] Figure 6 This is a cross-sectional view of the cane head of this utility model without the conical spring, shock-absorbing spring, and central shaft installed;

[0024] Figure 7 This is a front view showing the disassembled cane head of the present invention;

[0025] Figure 8 This is a split-up inverted view of the cane head of the present invention.

[0026] Short tube (10), upper short tube (101), lower short tube (102), central shaft core (11), claw seat (12), hemispherical bottom end (13), central through-shaft hole (14), hemispherical top recessed hole (15), lower through-shaft hole (16), lower recessed hole (17), inverted conical protrusion (18), upper nut assembly (19), lower nut assembly (20), inverted conical spring (21), limiting protrusion ring (22), limiting ring groove (23), orifice step (24), shaft core protrusion ring (25), shock-absorbing spring (26), rod hole (27), plastic anti-slip pad (28), lower cover (29), anti-slip block (30), square protrusion (31), threaded hole one (32), square groove (33), threaded hole two (34) Detailed Implementation

[0027] like Figures 1 to 8As shown: A self-balancing shock-absorbing cane includes a short tube 10, a central shaft 11, and a claw seat 12. The short tube 10 and the claw seat 12 are made of plastic. The bottom end of the short tube 10 is a hemispherical end head 13, and the center of the hemispherical end head 13 has a vertically penetrating central shaft hole 14. The top of the claw seat 12 has a hemispherical top recess 15. The bottom of the hemispherical end head 13 is rotatably connected to the hemispherical top recess 15 on the top of the claw seat 12. At the same time, the interlocking fit between the hemispherical end head 13 and the hemispherical top recess 15 serves to prevent the short tube 10 from falling off and to position it. The hemispherical top recess 15 and the hemispherical end head 13 have the same shape and fit perfectly; that is, the short tube 10 can be laterally rotated at any angle through the hemispherical end head 13 and the hemispherical top recess 15. After lateral rotation, the short tube 10 is... The claw seat 12 is tilted to one side; the center of the hemispherical top recess 15 is provided with a vertically oriented lower through-shaft hole 16, and the bottom of the claw seat 12 is provided with a lower recess 17 inwardly from the middle. The inner top wall of the lower recess 17 is an inverted conical protrusion 18, and the lower through-shaft hole 16 is opened in the middle of the inverted conical protrusion 18. The central shaft core 11 passes through the inside of the short tube 10, the middle through-shaft hole 14 and the lower through-shaft hole 16 in sequence. The top end of the central shaft core 11 is connected to the inside of the short tube 10 through the upper nut assembly 19, and the bottom end of the central shaft core 11 is connected to the lower recess 17 of the claw seat 12 through the lower nut assembly 20. An inverted conical spring 21 is provided between the top of the lower nut assembly 20 and the inverted conical protrusion 18 and is sleeved on the lower part of the central shaft core 11. The diameter of the lower through-shaft hole 16 is larger than the diameter of the central shaft core 11. The short tube 10, claw seat 12, and inverted conical spring 21 are connected and prevented from detaching via upper nut assembly 19 and lower nut assembly 20. The inverted conical spring 21 is fitted to the inverted conical protrusion 18 to prevent it from being too loose. This design allows for better compressibility between the inverted conical spring 21 and the short tube 10 when tilted to one side, providing better support and restoration after tilting. During use, the hemispherical bottom end and hemispherical top recess form a spherical arc fit. When the short tube tilts to one side relative to the claw seat, the restoration force of the inverted conical spring assists in the short tube's vertical self-balancing, thus allowing the cane to return to its vertical self-balancing position. This structural design effectively limits the range of tilting of the cane, making restoration easier and extending the lifespan of the inverted conical spring, preventing breakage.

[0028] The upper outer wall of the hemispherical bottom end 13 of this invention is provided with a protruding limiting ring 22. A limiting ring groove 23 is formed between the limiting ring 22 and the top of the claw seat 12. The limiting ring groove 23 restricts the range of movement of the short tube 10 relative to the claw seat 12. The edge of the limiting ring 22 abuts against the edge of the top of the claw seat 12, stopping the short tube 10 from tilting to one side. This structure further precisely limits the range of tilting of the cane stick to one side, providing the user with safer and more stable support.

[0029] The central through-hole 14 of this invention has a stepped opening 24 in the middle. The central shaft core 11 extends from the middle section and protrudes with a shaft core ring 25 that is correspondingly embedded and connected to the stepped opening 24. The shaft core ring 25 is fixed to the stepped opening 24. This structural design increases the lateral contact area between the central shaft core and the hemispherical bottom end, making their lateral movement more synchronized and improving the user experience. It also reduces wear between the hemispherical bottom end and the central shaft core during movement, extending the product's service life.

[0030] The short tube 10 of this invention includes an upper short tube 101 and a lower short tube 102. The lower short tube 102 is inserted into the upper short tube 101. A shock-absorbing spring 26 is installed in the tube hole between the upper short tube 101 and the lower short tube 102. The central shaft core 11 passes through the shock-absorbing spring 26. The top end of the central shaft core 11 is connected to the inner wall of the upper short tube 101 through an upper nut assembly 19. When the shock-absorbing spring 26 is compressed, the upper short tube 101 can move up and down elastically relative to the lower short tube 102. The downward movement of the upper short tube 101 stops when it abuts against the limiting protrusion 22. When the cane is impacted upon landing, the upper short tube, the lower short tube, and the shock-absorbing spring work together to absorb the impact force and buffer / reduce the vibration of the hand holding the cane. The bottom end of the lower short tube 102 is a solid hemispherical end head 13.

[0031] like Figure 1 , Figure 2 As shown: The upper part of the short tube 101 of this utility model is provided with a rod hole 27, and the rod hole 27 is detachably snapped with an upright cane rod.

[0032] The bottom of the claw body of the claw base 12 of this invention is fixedly connected with a plastic anti-slip pad 28 for anti-slip purposes. The design of the plastic anti-slip pad increases the coefficient of friction between the cane and the ground, thereby improving the anti-slip performance.

[0033] The short tube 10 of this invention can be tilted to one side by 0 to 35 degrees, preferably 0 to 25 degrees, relative to the claw seat 12. This angle range is suitable for use in various locations, such as starting on stairs or ramps, walking quickly on flat roads, and walking uphill and downhill.

[0034] The height of the limiting ring groove 23 described in this utility model is 3 mm to 8 mm, preferably 3 mm to 5 mm, which is suitable for most applications.

[0035] The recessed hole 17 of this utility model is fixedly covered with a lower cover 29 to prevent mud and sand from entering the recessed hole 17.

[0036] The diameter of the lower through hole 16 of this invention is 10% to 30% larger than the diameter of the central core 11, preferably 15% to 25%; the central core 11 is made of steel, which facilitates the cane bar to tilt and swing to one side through the central core 11, providing suitable space for movement.

[0037] The plastic anti-slip mat 28 of this invention has several anti-slip blocks 30 extending from its bottom cross section. The top of the mat has four square protrusions 31, with cross grooves formed between adjacent protrusions. A through threaded hole 32 is located at the center of each cross groove. The bottom of the mat has a surrounding step encircling the threaded hole 32, the height of which is equal to or greater than the thickness of the screw head. The claw body of the claw seat 12 has four square grooves 33 corresponding to the four square protrusions 31. A threaded hole 34 is located at the center of each of the four square grooves 33. The four square protrusions 31 are inserted into and engaged within the four square grooves 33, and fixed by screws passing through the threaded hole 32 and tightened into the threaded hole 34. This structure and installation design of the plastic anti-slip mat effectively prevents slipping while ensuring stable installation.

[0038] The upper short tube 101 and lower short tube 102 of this utility model are made of plastic, and the central core 11 is made of hard metal.

[0039] The upper nut assembly 19 of this utility model includes threads on the upper periphery of the central shaft core 11, a convex ring extending laterally around the central shaft core 11 on the inner wall of the upper short tube 101, and an upper nut; the lower nut assembly 20 includes threads on the lower periphery of the central shaft core 11 and a lower nut. After the top end of the central shaft core 11 passes through the convex ring, the upper nut is screwed into the threads on the upper periphery of the central shaft core 11 for fixation, and the bottom end of the central shaft core 11 is fixed by the lower nut being screwed into the threads on the lower periphery of the central shaft core 11.

[0040] In use, the hemispherical bottom end is constrained by the hemispherical top recess. When the cane is tilted to one side, the center of the hemispherical bottom end is used as the apex. The short tube rotates and tilts to one side relative to the claw seat. The central core swings with the cane as it tilts to one side, which causes the lower nut and the inner top wall of the lower recess to exert greater compression on the inverted conical spring to one side. After the cane is released, the restoring force of the inverted conical spring helps the central core return to its vertical position, thereby helping to drive the short tube and cane to return to their vertical position, forming a self-balancing reset of the short tube and cane.

Claims

1. A self-balancing shock-absorbing cane, comprising a short tube, a central shaft, and a claw seat, characterized in that: The short tube has a hemispherical bottom end with a vertically penetrating central through-hole. The claw seat has a hemispherical top recess in the middle, and the bottom of the hemispherical bottom end is rotatably connected to the hemispherical top recess on the top of the claw seat. The hemispherical top recess has a vertically penetrating lower through-hole at its center. The claw seat has a recessed hole at its bottom center, with an inverted conical protrusion on its inner top wall. The lower through-hole is located in the middle of the inverted conical protrusion. The central shaft passes through the inside of the short tube, the central through-hole, and the lower through-hole in sequence. The top of the central shaft is connected to the inside of the short tube via an upper nut assembly, and the bottom of the central shaft is connected to the lower recess of the claw seat via a lower nut assembly. An inverted conical spring is fitted between the top of the lower nut assembly and the inverted conical protrusion and is sleeved on the lower part of the central shaft. The diameter of the lower through-hole is larger than the diameter of the central shaft.

2. The self-balancing shock-absorbing cane as described in claim 1, characterized in that: The upper outer wall of the hemispherical bottom end is provided with a protruding limiting ring, and a limiting ring groove is formed between the limiting ring and the top of the claw seat to limit the range in which the short tube can tilt to one side relative to the claw seat.

3. The self-balancing shock-absorbing cane as described in claim 2, characterized in that: A step is provided in the middle of the top opening of the central through hole, and a protruding shaft core is provided in the middle section of the central shaft core, which is correspondingly embedded and connected to the step.

4. The self-balancing shock-absorbing cane as described in claim 3, characterized in that: The short tube includes an upper short tube and a lower short tube, with the lower short tube inserted inside the upper short tube. A shock-absorbing spring is installed in the tube hole between the upper and lower short tubes. The central shaft is inserted inside the shock-absorbing spring. The top of the central shaft is connected to the inner wall of the upper short tube through an upper nut assembly. When the shock-absorbing spring is compressed, the upper short tube can move up and down elastically relative to the lower short tube.

5. A self-balancing shock-absorbing cane as described in claim 4, characterized in that: The upper part of the short tube is provided with a rod hole, and a vertical cane rod can be detachably attached to the rod hole.

6. A self-balancing shock-absorbing cane as described in claim 5, characterized in that: The bottom of the claw body of the claw seat is fixedly connected with a plastic anti-slip pad for anti-slip.

7. A self-balancing shock-absorbing cane as described in claim 2, characterized in that: The short tube can be tilted to one side by 0 to 35 degrees relative to the claw seat.

8. A self-balancing shock-absorbing cane as described in claim 2 or 7, characterized in that: The height of the groove in the limiting ring is 3 mm to 8 mm.

9. A self-balancing shock-absorbing cane as described in claim 1, characterized in that: The opening of the recessed hole is fixed with a lower cover.

10. A self-balancing shock-absorbing cane as described in claim 6, characterized in that: The diameter of the lower through hole is 10% to 30% larger than the diameter of the central core; this allows the cane to tilt and swing to one side through the central core, providing room for movement.

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