Folding lock mechanism for folding wheel type walking aid

Abstract

A folding lock mechanism used on a folding wheel type walking aid relates to the field of walking aids and comprises a folding connecting piece, a lock hook, a folding pipe and an unlocking pull rope, the folding connecting piece is provided with a mounting space with an opening in the right end, the lock hook is located in the mounting space, the lock hook is provided with a pipe through groove penetrating left and right, and the pipe through groove is provided with an opening in the right end. The folding pipe penetrates through the pipe through groove and is hinged to the lock hook, the folding pipe is further hinged to the right end of the folding connecting piece, the unlocking pull rope is arranged at the right end of the top of the lock hook, a clamping rod is arranged in the left end of the installation space, when the wheel type walking aid is unfolded, the lock hook hooks the clamping rod, when the wheel type walking aid is folded, the unlocking pull rope is pulled, and the wheel type walking aid is folded. And the lock hook is separated from the clamping rod. According to the wheel type walking aid, the wheel type walking aid can be prevented from being folded due to misoperation during unfolding, and the use safety of the wheel type walking aid is further improved.

Description

Technical Field

[0001] The utility model relates to the field of walking aids, specifically to a folding lock mechanism for a folding wheeled walking aid. Background Art

[0002] A walking aid is an auxiliary device used for support, balance and providing mobile support, and it is widely used in the elderly, the disabled and those with limited mobility. The use of a walking aid can improve people's gait, reduce the risk of falling, enhance self-confidence, improve activity ability and extend the time of independent living. The patent document with the publication number CN108904229A discloses an intelligent wheeled walking aid, and discloses that: the seat cushion 18 is fastened to the first welded steel frame 32 and the second welded steel frame 36 through the first screw 39, the second screw 40, the third screw 41, the fourth screw 42, the fifth screw 43 and the sixth screw 44. The first welded steel frame 32 and the second welded steel frame 36 are connected by a long pin shaft 34 in the middle and can rotate around the long pin shaft 34. After unfolding, the two are arranged in a cross shape. The first welded steel frame 32 is connected to the connecting rod 31 through a short pin shaft 33, and the other side of the connecting rod 31 is connected to the mounting seat 30 and can rotate. The second welded steel frame 36 is connected to the connecting rod 38 through a short pin shaft 35, and the other side of the connecting rod 38 is connected to the second mounting seat 37 and can rotate. The first mounting seat 30 and the second mounting seat 37 can be U-shaped parts. Pins are installed on both side walls of the U-shaped parts. One end of the connecting rod has a perforation and can be installed on the pin, so that it can rotate around the pin. The bases of the U-shaped parts are respectively fixed (welded or thread-connected) to the sleeves 14 and 56. Through the above structure, the components such as the welded steel frames can be conveniently opened and closed, so as to realize the folding and opening of the wheeled walking aid.

[0003] In the above-mentioned disclosed patent document, when the first welded steel frame 32 and the second welded steel frame 36 are unfolded, the first welded steel frame 32 and the second welded steel frame 36 are not further fixed. If the seat cushion 18 is accidentally pulled during use, the first welded steel frame 32 and the second welded steel frame 36 will be folded. Therefore, the walking aid disclosed in the above patent document has a safety hazard during use. Summary of the Utility Model

[0004] The folding lock mechanism provided by the utility model is for a folding wheeled walking aid, and its main purpose is to overcome the problem that the first welded steel frame and the second welded steel frame of the existing wheeled walking aid cannot be further fixed after unfolding.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A folding lock mechanism for a folding wheeled walking aid, comprising a folding connecting piece, a locking hook, a folding tube and an unlocking pull rope. The folding connecting piece has an installation space with an open right end. The locking hook is located within the installation space. The locking hook is provided with a through groove for the tube that penetrates from left to right. The folding tube passes through the through groove for the tube and is hinged to the locking hook. The folding tube is also hinged to the right end of the folding connecting piece. The unlocking pull rope is arranged at the top right end of the locking hook. A clamping rod is arranged inside the left end of the installation space. When the wheeled walking aid is unfolded, the locking hook hooks the clamping rod. When the wheeled walking aid is folded, the unlocking pull rope is pulled, and the locking hook disengages from the clamping rod.

[0007] Further, front spring installation grooves and rear spring installation grooves are respectively arranged on the front and rear side surfaces of the through groove for the tube. A double torsion spring is clamped between the front spring installation groove and the rear spring installation groove. The top of the double torsion spring is provided with a front insertion part and a rear insertion part. The front insertion part and the rear insertion part are inserted into the folding tube. The front and rear ends of the double torsion spring respectively abut against the front spring installation groove and the rear spring installation groove.

[0008] Furthermore, the front spring installation groove and the rear spring installation groove are in a horizontally inverted "V" shape.

[0009] Further, the bottom of the locking hook is provided with a front hook part and a rear hook part. The top surfaces of the front hook part and the rear hook part are both first arc surfaces. The bottom surfaces of the front hook part and the rear hook part are both second arc surfaces. The right end surface to the bottom surface of the clamping rod is a third arc surface. The lower half of the left end surface of the clamping rod is an inclined surface that slopes from left to right. When the wheeled walking aid is unfolded, the front hook part and the rear hook part hook the bottom of the clamping rod.

[0010] Further, the top of the locking hook is provided with a connecting part that extends to the right. The connecting part is provided with a pull rope hole. One end of the unlocking pull rope passes through the pull rope hole and is connected to the connecting part.

[0011] Further, a first screw rod is penetrated through the left end of the folding connecting piece. One end of the first screw rod is locked and connected to a first nut. The left end of the folding connecting piece is an open structure.

[0012] Further, a second screw rod is penetrated through the locking hook. The second screw rod passes through the folding tube. One end of the second screw rod is locked and connected to a screw.

[0013] Further, a third screw rod is penetrated through the right end of the folding connecting piece. The third screw rod passes through the folding tube. One end of the third screw rod is locked and connected to a third nut.

[0014] As described above for the present utility model, compared with the prior art, the present utility model has the following advantages: The folding lock mechanism is applied to the wheeled walking aid. Two folding lock mechanisms that are symmetric left and right are adopted on the wheeled walking aid. The folding tubes of the two folding lock mechanisms are arranged in a crosswise manner and are hinged to each other. The left end of the folding connecting piece is hinged to the sleeve of the wheeled walking aid. When the wheeled walking aid is unfolded, the locking hook hooks the clamping rod. At this time, without unlocking, the folding tubes of the two folding lock mechanisms are in a fixed state and cannot be folded. Even if the seat cushion is pulled upward, the folding tubes of the two folding lock mechanisms will not be folded. When the wheeled walking aid needs to be folded, the unlocking pull rope must be pulled first to make the locking hook disengage from the clamping rod. At this time, the folding tubes of the two folding lock mechanisms can be folded. The present utility model can prevent the wheeled walking aid from being folded due to misoperation when it is unfolded, and further improve the safety of using the wheeled walking aid. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a structural diagram of the present utility model.

[0016] Figure 2 is a structural diagram of the present utility model from another angle.

[0017] Figure 3 is an exploded view of the structure of the present utility model.

[0018] Figure 4 is an exploded view of the structure of the present utility model from another angle.

[0019] Figure 5 is an exploded view of the structure of the present utility model from another angle. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0021] Refer to Figure 1 and Figure 2, A folding lock mechanism for a folding wheeled walking aid, comprising a folding connecting piece 1, a locking hook 2, a folding tube 3 and an unlocking pull rope 4. The folding connecting piece 1 has an installation space 5 with an open right end. The locking hook 2 is located within the installation space 5. The locking hook 2 is provided with a tube through groove 6 that penetrates from left to right. The folding tube 3 passes through the tube through groove 6 and is hinged to the locking hook 2. The folding tube 3 is also hinged to the right end of the folding connecting piece 1. The unlocking pull rope 4 is arranged at the top right end of the locking hook 2. A clamping rod 7 is arranged inside the left end of the installation space 5. When the wheeled walking aid is unfolded, the locking hook 2 hooks the clamping rod 7. When the wheeled walking aid is folded, the unlocking pull rope 4 is pulled, and the locking hook 2 disengages from the clamping rod 7.

[0022] Refer to Figure 1 , Figures 3 to 5 , On the front and rear sides of the tube through groove 6, a front spring installation groove 8 and a rear spring installation groove 9 are respectively provided. A double torsion spring 10 is clamped between the front spring installation groove 8 and the rear spring installation groove 9. The top of the double torsion spring 10 is provided with a front insertion part 11 and a rear insertion part 12. The front insertion part 11 and the rear insertion part 12 are inserted into the folding tube 3. The front and rear ends of the double torsion spring 10 respectively abut against the front spring installation groove 8 and the rear spring installation groove 9. In order to match the shapes of the front and rear ends of the double torsion spring 10 and make the double torsion spring 10 firmly clamped on the front spring installation groove 8 and the rear spring installation groove 9, the front spring installation groove 8 and the rear spring installation groove 9 are in a horizontally inverted V shape.

[0023] Refer to Figures 2 to 5 , The bottom of the locking hook 2 is provided with a front hook part 13 and a rear hook part 14. The top surfaces of the front hook part 13 and the rear hook part 14 are both first arc surfaces 15. The bottom surfaces of the front hook part 13 and the rear hook part 14 are both second arc surfaces 16. The right end surface to the bottom surface of the clamping rod 7 is a third arc surface 17. The lower half of the left end surface of the clamping rod 7 is an inclined surface 18 that slopes from left to right. When the wheeled walking aid is unfolded, the front hook part 13 and the rear hook part 14 hook the bottom of the clamping rod 7, and the bottom of the clamping rod 7 is located within the first arc surface 15. The top of the locking hook 2 is provided with a connecting part 19 that extends to the right. The connecting part 19 is provided with a pull rope hole 20. One end of the unlocking pull rope 4 passes through the pull rope hole 20 and is connected to the connecting part 19.

[0024] Refer to Figures 3 to 5, a first screw rod 21 is inserted through the left end of the folding connecting piece 1. One end of the first screw rod 21 is locked and connected to a first nut 22. The left end of the folding connecting piece 1 is an open structure. When the folding lock mechanism is installed, one end of the sleeve of the wheeled walking aid is located inside the left end of the folding connecting piece 1. The first screw rod 21 passes through one end of the sleeve of the wheeled walking aid to realize the hinged connection with the folding connecting piece 1. A second screw rod 23 is inserted through the locking hook 2. The second screw rod 23 passes through the folding tube 3. The second screw rod 23 is provided with internal threads. One end of the second screw rod 23 is locked and connected to a screw 24. The folding tube 3 is hinged to the locking hook 2 through the second screw rod 23, and the locking hook 2 can rotate relative to the folding tube 3. A third screw rod 25 is inserted through the right end of the folding connecting piece 1. The third screw rod 25 passes through the folding tube 3. One end of the third screw rod 25 is locked and connected to a third nut 26. The folding tube 3 is hinged to the right end of the folding connecting piece 1 through the third screw rod 25, and the folding tube 3 and the locking hook 2 can rotate relative to the folding tube 3.

[0025] Referring to Figures 1 to 5 , the working principle of the present utility model is as follows: Apply this folding lock mechanism to a wheeled walking aid. Two folding lock mechanisms that are symmetrical left and right are adopted on the wheeled walking aid. The folding tubes 3 of the two folding lock mechanisms are arranged in a cross shape and are hinged to each other. The left end of the folding connecting piece 1 is hinged to the sleeve of the wheeled walking aid. Seat support rods are connected to the tops of the folding tubes 3 of the two folding lock mechanisms, and the seat is connected between the two seat support rods. When the wheeled walking aid is unfolded, the front hook part 13 and the rear hook part 14 of the locking hook 2 hook the bottom of the clamping rod 7. At this time, without unlocking, the folding tubes 3 of the two folding lock mechanisms are in a fixed state and cannot be folded. Even if the seat is pulled upward, the folding tubes 3 of the two folding lock mechanisms will not be folded. When the wheeled walking aid needs to be folded, the unlocking pull rope 4 must be pulled first. The unlocking pull rope 4 pulls the locking hook 2 upward. After the locking hook 2 is pulled upward, its bottom rotates to the right, so that the front hook part 13 and the rear hook part 14 of the locking hook 2 are disengaged from the bottom of the clamping rod 7. At this time, the folding tubes 3 of the two folding lock mechanisms can be folded. When the wheeled walking aid is unfolded from being folded to unfolded, press the seat support rod of the wheeled walking aid downward. At this time, the folding tube 3 and the locking hook 2 move downward. When the left end of the bottom surface of the front hook part 13 and the rear hook part 14 of the locking hook 2 abuts against the right end surface of the clamping rod 7, the bottom of the locking hook 2 rotates to the right until the left end of the bottom surface of the front hook part 13 and the rear hook part 14 of the locking hook 2 no longer abuts against the right end surface of the clamping rod 7, and the front hook part 13 and the rear hook part 14 of the locking hook 2 hook the bottom of the clamping rod 7.

[0026] The above is only the specific implementation manner of the present utility model, but the design concept of the present utility model is not limited thereto. Any non-substantive modification made to the present utility model using this concept shall fall within the scope of infringement of the protection scope of the present utility model.

Claims

1. A folding lock mechanism for a folding wheeled walking aid, characterized in that: It includes a folding connecting piece, a locking hook, a folding tube and an unlocking pull rope. The folding connecting piece has an installation space with an open right end. The locking hook is located in the installation space. The locking hook is provided with a tube through groove that penetrates left and right. The folding tube passes through the tube through groove and is hinged to the locking hook. The folding tube is also hinged to the right end of the folding connecting piece. The unlocking pull rope is arranged at the top right end of the locking hook. A clamping rod is arranged inside the left end of the installation space. When the wheeled walking aid is unfolded, the locking hook hooks the clamping rod. When the wheeled walking aid is folded, the unlocking pull rope is pulled, and the locking hook disengages from the clamping rod.

2. The folding lock mechanism for a folding wheeled walking aid according to claim 1, characterized in that: A front spring installation groove and a rear spring installation groove are respectively arranged on the front and rear side surfaces of the tube through groove. A double torsion spring is clamped between the front spring installation groove and the rear spring installation groove. The top of the double torsion spring is provided with a front insertion part and a rear insertion part. The front insertion part and the rear insertion part are inserted into the folding tube. The front and rear ends of the double torsion spring respectively abut against the front spring installation groove and the rear spring installation groove.

3. The folding lock mechanism for a folding wheeled walking aid according to claim 2, wherein: The front spring installation groove and the rear spring installation groove are in a horizontally inverted "V" shape.

4. The folding lock mechanism for a folding wheeled walking aid according to claim 1, characterized in that: The bottom of the locking hook is provided with a front hook part and a rear hook part. The top surfaces of the front hook part and the rear hook part are both first arc surfaces. The bottom surfaces of the front hook part and the rear hook part are both second arc surfaces. The right end surface to the bottom surface of the clamping rod is a third arc surface. The lower half of the left end surface of the clamping rod is an inclined surface that slopes from left to right. When the wheeled walking aid is unfolded, the front hook part and the rear hook part hook the bottom of the clamping rod.

5. The folding lock mechanism for a folding wheeled walking aid according to claim 1, characterized in that: The top of the locking hook is provided with a connecting part that extends to the right. The connecting part is provided with a pull rope hole. One end of the unlocking pull rope passes through the pull rope hole and is connected to the connecting part.

6. The folding lock mechanism for a folding wheeled walking aid according to claim 1, characterized in that: A first screw rod passes through the left end of the folding connecting piece. One end of the first screw rod is locked and connected to a first nut. The left end of the folding connecting piece is an open structure.

7. The folding lock mechanism for a folding wheeled walking aid according to claim 1, characterized in that: The locking hook is provided with a second screw rod. The second screw rod passes through the folding tube. One end of the second screw rod is locked and connected to a screw.

8. A folding lock mechanism for a folding wheeled walking aid according to claim 1, characterized in that: A third screw rod passes through the right end of the folding connecting piece. The third screw rod passes through the folding tube. One end of the third screw rod is locked and connected to a third nut.

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