Wheelchair turning handle

Abstract

The utility model provides a wheelchair angle degree push handle, belongs to wheelchair accessory technical field, including connecting rod, handle and angle adjusting assembly, angle adjusting assembly includes fixed base, rotating seat and unlocking button, the fixed base is provided with fixed tooth, the rotating seat is provided with locking tooth, the unlocking button is provided with transmission tooth, the rotating seat rotates the installation to fixed base, the unlocking button slides the connection to fixed base and rotating seat, transmission tooth engages to fixed tooth and locking tooth, and transmission tooth can completely slide to fixed tooth and separate locking tooth, connecting rod and fixed base fixed connection, handle and rotating seat fixed connection, through the cooperation of locking tooth, transmission tooth and fixed tooth, have realized the push handle height convenient and reliable locking and unlocking, when adjusting transmission tooth separates locking tooth can make handle swing up and down relative connecting rod, after locking transmission tooth engages three simultaneously and cannot swing, and this structure makes the push handle height to be flexible and adapt to the push chair of different height, and the use comfort and convenience are improved obviously.

Description

Technical Field

[0001] This utility model belongs to the field of wheelchair accessories technology, and in particular relates to a wheelchair angle-turning push handle. Background Technology

[0002] A wheelchair is a chair equipped with wheels and is an important means of transportation for the injured, sick, and disabled. It not only meets the mobility needs of people with limb disabilities and limited mobility, but more importantly, it facilitates the movement and care of family members, enabling them to exercise and participate in social activities. A typical wheelchair consists of a frame, wheels, brakes, and a seat / backrest. The wheelchair handle is a horizontal bar located at the top of the backrest, spanning from one side to the other. Its main function is to allow caregivers to easily grip and push the wheelchair, enhancing the overall structural strength and reducing caregiver fatigue. However, most existing wheelchair handles are fixedly connected to the frame, preventing height adjustment. This makes it difficult to accommodate users of different heights; an ill-fitting handle requires the operator to bend over or raise their arms, leading to fatigue and affecting comfort and convenience, thus impacting the user experience. Summary of the Invention

[0003] Based on the aforementioned problems in the existing technology, this utility model provides a wheelchair angle-adjusting push handle, including a connecting rod and a grip, and further including an angle adjustment component. The angle adjustment component includes a fixed base, a rotating base, and an unlocking button. The fixed base is provided with a fixing tooth, the rotating base is provided with a locking tooth, and the unlocking button is provided with a transmission tooth. The rotating base is rotatably mounted to the fixed base, and the projections of the fixing tooth and the locking tooth in the width direction of the rack coincide with each other. The unlocking button is slidably connected to the fixed base and the rotating base, and the sliding direction is the width direction of the rack. The transmission tooth is engaged with the fixing tooth and the locking tooth, and the transmission tooth can completely slide onto the fixing tooth and disengage from the locking tooth. The connecting rod and the fixed base are fixedly connected, and the grip and the rotating base are fixedly connected. The grip is rotatably connected to the connecting rod through the angle adjustment component.

[0004] The fixed base includes a first sleeve portion, one end of which is integrally formed with a circular first mounting portion; the rotating base includes a second sleeve portion, one end of which is integrally formed with a circular second mounting portion. The first mounting portion and the second mounting portion are coaxially rotatably connected. The fixing teeth and locking teeth are annular structures of the same diameter and are coaxially arranged in the first mounting portion and the second mounting portion, respectively. The width direction of the fixing teeth and the locking teeth are parallel to the axial direction. The fixing teeth and the locking teeth cooperate to form a sliding cavity. The unlocking button is slidably installed into the sliding cavity along the axial direction. The transmission teeth are arranged on the periphery of the unlocking button and mesh with the fixing teeth and the locking teeth.

[0005] A reset spring is provided inside the sliding cavity. One end of the reset spring abuts against the first mounting part, and the other end of the reset spring abuts against the unlock button. The reset spring resists the unlock button from sliding towards the first mounting part.

[0006] The first mounting part has a spring limiting post at the center of the sliding cavity, and the reset spring is sleeved and installed on the spring limiting post. The periphery of the spring limiting post is provided with several limiting wings extending radially.

[0007] In this configuration, a fixed retaining ring is fixedly installed on the side of the first mounting part facing the second mounting part. The fixed retaining ring surrounds the fixed teeth, and an inner ring hook is provided on the outer side of the fixed retaining ring, which is away from the first mounting part. A movable retaining ring is fixedly installed on the side of the second mounting part facing the first mounting part. The movable retaining ring is composed of two identical half-rings spliced ​​together. The movable retaining ring surrounds the locking teeth, and an outer ring hook that is adapted to hook onto the inner ring hook is provided on the inner side of the movable retaining ring. The fixed retaining ring and the movable retaining ring are connected to each other by relative rotation through the cooperation of the inner ring hook and the outer ring hook.

[0008] The rotating base has a load-bearing handle integrally formed at the end away from the fixed base. The cross-section of the load-bearing handle is teardrop-shaped, with the end closer to the rotating base being larger than the other end.

[0009] The load-bearing handle is provided with a connecting groove for fixed connection with the grip rod, and the connecting groove is provided with a number of radially protruding friction ridges.

[0010] The wheelchair angle adjustment handle includes two mutually mirror-symmetrical angle adjustment components. Each end of the handle is fixedly connected to an angle adjustment component, and each angle adjustment component is fixedly connected to a connecting rod.

[0011] The rotary table is also equipped with a brake lever, which is connected to a brake assembly mounted on a pulley via a brake cable.

[0012] The beneficial effects of this invention are as follows: Through the cooperation of the locking teeth, transmission teeth, and fixed teeth, reliable locking and convenient unlocking of the relative rotation of the fixed seat and the rotating seat are achieved. When the transmission teeth simultaneously engage with the locking teeth and the fixed teeth, the three form an interlocking structure, preventing relative rotation. Pressing the unlock button causes the transmission teeth to slide along the tooth width direction until they are completely disengaged from the locking teeth, releasing the lock and allowing the fixed seat and the rotating seat to rotate relative to each other, thereby adjusting the height of the handle. This structure allows the height of the handle to be flexibly adjusted according to the user's height, effectively avoiding bending over or raising the hand to operate due to an unsuitable height, significantly improving the comfort and convenience of use. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of a wheelchair-turning push handle.

[0014] Figure 2 This is a three-dimensional structural diagram of the angle adjustment component.

[0015] Figure 3 This is a three-dimensional structural diagram of the angle adjustment component at another angle.

[0016] Figure 4 This is a schematic diagram of the three-dimensional structure of the rotating base.

[0017] Figure 5 This is a diagram illustrating the connection between the mounting base and the unlock button.

[0018] Figure 6 This is a diagram showing the connection between the fixed base and the unlock button, concealing the fixed retaining ring and the movable retaining ring.

[0019] Figure 7 This is a three-dimensional structural diagram of the fixed base.

[0020] Figure 8 This is a schematic diagram showing the combination of the fixed retaining ring and the movable retaining ring.

[0021] Figure 9 This is a cross-sectional structural diagram of the angle adjustment component.

[0022] Figure 10 This is a cross-sectional view of another section of the angle adjustment component. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0024] As attached Figure 1-10 The wheelchair swivel handle shown includes two connecting rods 1, a handle 2, and two angle adjustment components 3. The two angle adjustment components 3 are mirror-symmetrical to each other. An angle adjustment component 3 is fixedly connected to each end of the handle 2. Each angle adjustment component 3 is then fixedly connected to a connecting rod 1. The handle 2 is rotatably connected to the connecting rod 1 through the angle adjustment components 3.

[0025] The angle adjustment assembly 3 includes a fixed base 4, a rotating base 5, and an unlocking button 6. The fixed base 4 includes a first sleeve 7. One end of the first sleeve 7 is integrally formed with a circular first mounting part 8. One end of the connecting rod 1 is fixedly installed to the other end of the first sleeve 7 by bolts. The rotating base 5 includes a second sleeve 9. One end of the second sleeve 9 is integrally formed with a circular second mounting part 10. The end of the rotating base 5 away from the fixed base 4, i.e., the second sleeve 9, is integrally formed with a load-bearing handle 11. The cross-section of the load-bearing handle 11 is teardrop-shaped, with the end closer to the second sleeve 9 being larger than the other end. The load-bearing handle 11 is provided with a connecting groove 12 for fixed connection with the grip 2. The connecting groove 12 is provided with six radially protruding friction ridges 13. The six friction ridges 13 are evenly spaced and arranged circumferentially along the inner wall of the connecting groove 12. The two ends of the grip 2 are respectively fixedly installed into the connecting grooves 12 of the two rotating bases 5 by bolts. The friction ridges 13 and the grip 2 are interference fit. The first mounting part 8 and the second mounting part 10 are both circular in design to facilitate coaxial rotational connection between the two. The extension direction of the connecting rod 1 and the extension direction of the grip 2 are perpendicular to each other. A brake lever 14 is provided on the second sleeve section 9 of the swivel 5. The brake lever 14 is connected to the brake assembly provided on the pulley via a brake cable. The brake lever 14 and the brake assembly can be conventional brake levers 14 and brake assemblies used in wheelchairs, bicycles, and motorcycles.

[0026] A fixed tooth 15 in a circular ring structure is coaxially arranged at the center of the first mounting part 8 of the fixed base 4, and a locking tooth 16 in a circular ring structure is coaxially arranged at the center of the second mounting part 10 of the rotary base 5. The rotary base 5 is rotatably mounted to the fixed base 4. The fixed tooth 15 and the locking tooth 16 have the same diameter, so that the projections of the fixed tooth 15 and the locking tooth 16 in the width direction of the rack coincide with each other. The width direction of the fixed tooth 15 and the locking tooth 16 are parallel to the axial direction, that is, the projections of the fixed tooth 15 and the locking tooth 16 in the axial direction coincide with each other. The fixed tooth 15 and the locking tooth 16 contact and cooperate to form a sliding cavity 17. The unlocking button 6 is slidably mounted in the sliding cavity 17 along the axial direction, that is, the unlocking button 6 is slidably connected to the fixed base 4 and the rotary base 5. A transmission tooth 18 is arranged on the periphery of the unlocking button 6. The transmission tooth 18 meshes with the fixed tooth 15 and the locking tooth 16, and the transmission tooth 18 can completely slide onto the fixed tooth 15 and disengage from the locking tooth 16. The first mounting part 8 has a spring limiting post 19 at the center of the sliding cavity 17. Four radially extending limiting wings 20 are arranged around the periphery of the spring limiting post 19 in a cross shape. A return spring 21 is sleeved on the spring limiting post 19. One end of the return spring 21 abuts against the first mounting part 8, and the other end abuts against the unlocking button 6. The return spring 21 resists the unlocking button 6 from sliding towards the first mounting part 8. When the unlocking button 6 slides closest to the second mounting part 10, the transmission gear 18 simultaneously engages with the locking gear 16 and the fixing gear 15, forming an interlocking structure. The rotating base 5 cannot rotate relative to the fixed base 4, meaning the grip 2 is locked and cannot swing up and down. When the unlocking button 6 is pressed and slides towards the first mounting part 8 until the transmission gear 18 disengages from the locking gear 16, the locking gear 16 is no longer locked, and the rotating base 5 can rotate relative to the fixed base 4, meaning the grip 2 can swing up and down and be adjusted to a suitable height.

[0027] A retaining ring 22 is fixedly installed on the side of the first mounting part 8 facing the second mounting part 10. The retaining ring 22 has four nut grooves 23 on the side facing the second mounting part 10, and nuts are installed in the nut grooves 23. The first mounting part 8 is fixedly installed onto the retaining ring 22 by using bolts passing through it and threadedly connecting it to the nuts. The retaining ring 22 surrounds the retaining teeth 15, and an inner ring hook 24 is provided on the outer side of the retaining ring 22, away from the first mounting part 8. A movable retaining ring 25 is fixedly installed on the side of the second mounting part 10 facing the first mounting part 8. The second mounting part 10 is provided with… There are four threaded holes 26, which are staggered with the nut groove 23. The movable retaining ring 25 is provided with a round hole 27 corresponding to the threaded hole 26. The movable retaining ring 25 and the second mounting part 10 are fixedly connected by a bolt passing through the round hole 27 and engaging with the threaded hole 26. The movable retaining ring 25 is composed of two identical half-rings spliced ​​together. Each half-ring is provided with a round hole 27. The movable retaining ring 25 surrounds the locking tooth 16. The inner side of the movable retaining ring 25 is provided with an outer ring hook 28 that is adapted to engage with the inner ring hook 24. The fixed retaining ring 22 and the movable retaining ring 25 are connected to each other by relative rotation through the engagement of the inner ring hook 24 and the outer ring hook 28. During installation, the two half-rings can be brought close together on both sides of the fixed retaining ring 22 to form a complete movable retaining ring 25, and the outer ring hook 28 and the inner ring hook 24 can be hooked together. The fixed retaining ring 22 is provided with an operating hole corresponding to the round hole 27. The movable retaining ring 25 and the first mounting part 8 can be fixedly connected by bolts through the operating holes. Then, the second mounting part 10 can be fixedly installed onto the fixed retaining ring 22 by bolts.

[0028] The push handle provided by this utility model is installed on a wheelchair frame. When the height of the handle needs to be adjusted, the unlocking buttons 6 on both sides of the angle adjustment component 3 can be pressed simultaneously to unlock both sides of the rotating base 5. At this time, the handle height can be adjusted by swinging it up and down. When the appropriate height is reached, the unlocking buttons 6 are released. The unlocking buttons 6 automatically spring back to their original position under the action of the return spring 21, and the rotating base 5 is locked again and cannot rotate. At this time, it can be used normally. There is an unlocking button 6 on both sides, which must be pressed simultaneously to adjust the height of the handle 2. This can prevent accidental unlocking due to contact and has a certain degree of safety protection.

[0029] The above-described embodiments are merely one implementation of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A wheelchair swivel handle, comprising a connecting rod (1) and a grip (2), characterized in that, It also includes an angle adjustment component (3), which includes a fixed base (4), a rotating base (5), and an unlocking button (6). The fixed base (4) is provided with a fixed tooth (15), the rotating base (5) is provided with a locking tooth (16), and the unlocking button (6) is provided with a transmission tooth (18). The rotating base (5) is rotatably mounted to the fixed base (4), and the projections of the fixed tooth (15) and the locking tooth (16) in the width direction of the rack coincide with each other. The unlocking button (6) is slidably connected to the fixed base (4) and the rotating base (5), and the sliding direction is the width direction of the rack. The transmission tooth (18) is engaged with the fixed tooth (15) and the locking tooth (16), and the transmission tooth (18) can slide completely onto the fixed tooth (15) and disengage from the locking tooth (16). The connecting rod (1) is fixedly connected to the fixed base (4), and the grip (2) is fixedly connected to the rotating base (5). The grip (2) is relatively rotatably connected to the connecting rod (1) through the angle adjustment component (3).

2. The wheelchair turning handle according to claim 1, characterized in that, The fixed seat (4) includes a first sleeve part (7), and a circular first mounting part (8) is integrally formed at one end of the first sleeve part (7); the rotating seat (5) includes a second sleeve part (9), and a circular second mounting part (10) is integrally formed at one end of the second sleeve part (9); the first mounting part (8) and the second mounting part (10) are coaxially rotatably connected; the fixed tooth (15) and the locking tooth (16) are circular ring structures with the same diameter, and are respectively coaxially arranged in the first mounting part (8) and the second mounting part (10); the width direction of the fixed tooth (15) and the locking tooth (16) are parallel to the axial direction; the fixed tooth (15) and the locking tooth (16) cooperate to form a sliding cavity (17); the unlocking button (6) is slidably installed in the sliding cavity (17) along the axial direction; the transmission tooth (18) is arranged on the periphery of the unlocking button (6) and meshes with the fixed tooth (15) and the locking tooth (16).

3. A wheelchair swivel handle according to claim 2, characterized in that, A reset spring (21) is provided inside the sliding cavity (17). One end of the reset spring (21) abuts against the first mounting part (8), and the other end of the reset spring (21) abuts against the unlock button (6). The reset spring (21) resists the unlock button (6) and slides towards the first mounting part (8).

4. A wheelchair turning handle according to claim 3, characterized in that, The first mounting part (8) has a spring limiting post (19) at the center of the sliding cavity (17). The reset spring (21) is sleeved and installed on the spring limiting post (19). The circumference of the spring limiting post (19) is provided with a number of radially extending limiting wings (20).

5. A wheelchair turning handle according to claim 2, characterized in that, A fixed retaining ring (22) is fixedly installed on the side of the first mounting part (8) that is close to the second mounting part (10). The fixed retaining ring (22) surrounds the fixed tooth (15). An inner ring hook (24) is provided on the outer side of the fixed retaining ring (22). The inner ring hook (24) is far away from the first mounting part (8). A movable retaining ring (25) is fixedly installed on the side of the second mounting part (10) that is close to the first mounting part (8). The movable retaining ring (25) is made of two half-rings with the same structure spliced ​​together. The movable retaining ring (25) surrounds the locking tooth (16). An outer ring hook (28) is provided on the inner side of the movable retaining ring (25) that is adapted to hook the inner ring hook (24). The fixed retaining ring (22) and the movable retaining ring (25) are connected to rotate relative to each other through the cooperation of the inner ring hook (24) and the outer ring hook (28).

6. A wheelchair turning handle according to any one of claims 1-5, characterized in that, The rotating base (5) is integrally formed with a load-bearing handle (11) at one end away from the fixed base (4). The cross-section of the load-bearing handle (11) is a teardrop shape with the end closer to the rotating base (5) being larger than the other end.

7. A wheelchair turning handle according to claim 6, characterized in that, The load-bearing handle (11) is provided with a connecting groove (12) for fixed connection with the grip (2), and a number of radially protruding friction ridges (13) are provided in the connecting groove (12).

8. A wheelchair swivel handle according to any one of claims 1-5, characterized in that, It includes two mutually mirror-symmetrical angle adjustment components (3), and each end of the grip (2) is fixedly connected to an angle adjustment component (3), and each angle adjustment component (3) is further fixedly connected to a connecting rod (1).

9. A wheelchair swivel handle according to any one of claims 1-5, characterized in that, The rotary table (5) is also provided with a brake lever (14), which is connected to a brake assembly on the pulley via a brake cable.

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