Folding mechanism of rollator

Abstract

A rollator folding mechanism comprises a front frame and a rear frame, and the rear end of the front frame is connected with the front end of the rear frame through a folding mechanism. The folding mechanism comprises a front connector and a rear connector, the front connector comprises a front fixing surface, a connecting surface and a clamping surface, the front fixing surface is fixed with the front frame, the connecting surface is arranged at the upper end of the front fixing surface, the clamping surface is arranged at the lower end of the front fixing surface, the connecting surface is provided with a connecting hole and a clamping hole, and one end of the front fixing surface is provided with a clamping groove; the rear connector comprises a rear fixing surface and a quick-release wrench, the rear fixing surface is connected with the rear frame and provided with a connecting sleeve and a fixing sleeve, and a rotating shaft is arranged in the fixing sleeve; the bottom end of the quick-release wrench is fixedly connected with the rotating shaft; when the front connecting body and the rear connecting body are buckled with each other, the connecting hole and the connecting sleeve are correspondingly arranged, and a child-mother screw is inserted into the connecting hole, so that the front frame and the rear frame can rotate by taking the child-mother screw as a shaft; when the quick-release wrench is screwed tightly, the movable end of the quick-release wrench abuts against the rear end face of the front fixing face.

Description

Technical Field

[0001] This utility model relates to the field of personal mobility tools, and in particular to a folding mechanism for a walking aid. Background Technology

[0002] As an essential assistive product for the daily lives of the elderly, walking aids can help elderly people with mobility issues, such as patients, to take care of themselves and go out for walks like normal people. They are mainly used to train the elderly's leg and balance abilities.

[0003] Traditional walking aids for the elderly often use a fixed frame structure, which is very inconvenient to store, especially for elderly users. Therefore, a foldable walking aid that can be easily stored is a product urgently needed in the market. Utility Model Content

[0004] A folding mechanism for a walking aid includes a front frame and a rear frame. A steering rod is rotatably connected to the front end of the front frame, with a handle at the top and a front wheel at the bottom. A rear wheel is located at the rear end of the rear frame. The rear end of the front frame is connected to the front end of the rear frame via a folding mechanism. The folding mechanism includes a front connecting body and a rear connecting body. The front connecting body includes a front fixed surface, a connecting surface, and a locking surface. The front fixed surface is perpendicularly fixed to the rear end face of the front frame. The connecting surface is perpendicularly disposed at the upper end of the front fixed surface, and the locking surface is perpendicularly disposed at the lower end of the front fixed surface. A connecting hole is formed at one end of the connecting surface, and a locking hole is formed at the other end. A locking groove is formed inward at one end of the locking hole on the front fixed surface. The rear connector includes a rear fixed surface and a quick-release wrench. The rear fixed surface is perpendicularly connected to the front end of the rear frame. A connecting sleeve is provided at one end of the rear fixed surface corresponding to the connecting hole, and a fixed sleeve is provided at one end corresponding to the snap-fit ​​hole. A rotating shaft is rotatably provided inside the fixed sleeve, and a rotating hole is opened in the middle of the fixed sleeve. The bottom end of the quick-release wrench passes through the rotating hole and is fixedly connected to the rotating shaft. The quick-release wrench can rotate laterally along the opening direction of the rotating hole. When the front connector and the rear connector are engaged, the connecting hole and the connecting sleeve are correspondingly provided and a male and female screw is inserted so that the front frame and the rear frame can rotate around the male and female screw as the axis. The quick-release wrench is embedded in the snap-fit ​​groove. When the quick-release wrench is tightened, the movable end of the quick-release wrench abuts against the rear end face of the front fixed surface.

[0005] Furthermore, the front end of the connecting body and the middle of the locking surface are provided with mating grooves, and the top and bottom ends of the rear fixing surface are provided with mating plates corresponding to the mating grooves. When the front connecting body and the rear connecting body are fastened together, the mating plates are embedded in the mating grooves.

[0006] Furthermore, the rear fixing surface is also provided with abutting surfaces on the upper and lower sides. When the front connector and the rear connector are fastened together, the bottom surface of the connecting surface abuts against the top surface of the upper abutting surface, and the top surface of the locking surface abuts against the bottom surface of the lower abutting surface.

[0007] Furthermore, a lever is provided forward at the front end of the connector corresponding to the snap-fit ​​hole position. The lever is gradually raised from front to back. The top end of the rotating shaft passes through the top end of the fixed sleeve. When the front connector and the rear connector are engaged, the top end of the rotating shaft is embedded in the snap-fit ​​hole.

[0008] Furthermore, a clamping block is provided on the front end of the connecting surface corresponding to the snap-fit ​​groove. The clamping block has a clamping snap-fit ​​groove corresponding to the snap-fit ​​groove. When the front connecting body and the rear connecting body are engaged with each other, the quick-release wrench is embedded in the snap-fit ​​groove and the clamping snap-fit ​​groove, and the movable end of the quick-release wrench abuts against the front end of the clamping block.

[0009] Furthermore, the clamping block has a hollow structure.

[0010] Furthermore, the front wheel has a diameter of 10 inches, and the rear wheel has a diameter of 8 inches.

[0011] Furthermore, both the front and rear wheels are configured as two on the left and two on the right, and each of the two rear wheels is equipped with a braking device.

[0012] Furthermore, a brake lever is provided on each of the left and right ends of the handle, and both brake levers can control the braking device.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. The front and rear frames can be quickly connected or folded through the front connector and the rear connector, making it convenient for the storage and use of the bicycle.

[0015] 2. A mating plate is set on the connecting surface and the mounting surface, and a corresponding mating plate is set on the rear fixed surface to achieve accurate docking between the front connecting body and the rear connecting body, and to ensure the coaxiality of the front frame and the rear frame.

[0016] 3. Use a quick-release wrench to connect with the front fixed surface for quick disassembly and a tight connection. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the folding mechanism;

[0019] Figure 3 This is a schematic diagram of the structure of this utility model when unfolded;

[0020] Figure 4 This is a schematic diagram of the structure of this utility model when folded.

[0021] In the diagram, 1. Front frame; 2. Steering rod; 3. Front wheel; 4. Rear frame; 5. Rear wheel; 6. Folding mechanism; 7. Front fixed surface; 8. Connecting surface; 9. Locking surface; 10. Connecting hole; 11. Locking hole; 12. Butt joint groove; 13. Locking groove; 14. Fastening block; 15. Fastening locking groove; 16. Rear fixed surface; 17. Fixed sleeve; 18. Connecting sleeve; 19. Butt joint plate; 20. Abutment surface; 21. Shaft; 22. Quick release wrench; 23. Threaded screw; 24. Handle; 25. Braking device; 26. Brake lever. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the present invention will be further described in detail below with reference to embodiments. Specific details will be involved in the following description to ensure a thorough understanding of the present invention. However, the present invention can still be realized without these specific details, meaning that those skilled in the art can more effectively explain the nature of their work to other skilled in the art using these descriptions and statements herein. Furthermore, it should be understood that the specific embodiments described herein are merely illustrative of the application and are not intended to limit the actual scope of protection. All raw materials used in the following embodiments are commercially available products.

[0023] Example 1, such as Figures 1-4 As shown, a folding mechanism for a walking aid includes a front frame 1 and a rear frame 4. The front frame 1 is rotatably connected to a steering rod 2 at its front end, with a handlebar 24 at the top and a front wheel 3 at the bottom. The rear frame 4 has a rear wheel 5 at its rear end. The rear end of the front frame 1 and the front end of the rear frame 4 are connected via a folding mechanism 6. The folding mechanism 6 includes a front connecting body and a rear connecting body. The front connecting body includes a front fixing surface 7, a connecting surface 8, and a locking surface 9. The front fixing surface 7 is perpendicularly fixed to the rear end face of the front frame 1. The connecting surface 8 is perpendicularly positioned above the front fixing surface 7, and the locking surface 9 is perpendicularly positioned below the front fixing surface 7. One end of the connecting surface 8 has a connecting hole 10, and the other end has a locking hole 11. One end of the locking hole 11 on the front fixing surface 7 has an inwardly extending locking groove 13. The rear connecting body... The body includes a rear fixing surface 16 and a quick-release wrench 22. The rear fixing surface 16 is perpendicularly connected to the front end face of the rear frame 4. A connecting sleeve 18 is provided at one end of the rear fixing surface 16 corresponding to the connecting hole 10, and a fixing sleeve 17 is provided at one end corresponding to the snap-fit ​​hole 11. A rotating shaft 21 is rotatably provided inside the fixing sleeve 17, and a rotating hole is opened in the middle of the fixing sleeve 17. The bottom end of the quick-release wrench 22 passes through the rotating hole and is fixedly connected to the rotating shaft 21. The quick-release wrench 22 can rotate laterally along the opening direction of the rotating hole. When the front connecting body and the rear connecting body are engaged, the connecting hole 10 and the connecting sleeve 18 are correspondingly provided and the male and female screws 23 are inserted so that the front frame 1 and the rear frame 4 can rotate around the male and female screws 23 as the axis. The quick-release wrench 22 is embedded in the snap-fit ​​groove 13. When the quick-release wrench 22 is tightened, the movable end of the quick-release wrench 22 abuts against the front fixing surface 7.

[0024] The connecting surface 8 and the middle of the locking surface 9 are both provided with docking grooves 12. The top and bottom of the rear fixing surface 16 are provided with docking plates 19 corresponding to the docking grooves 12. When the front connecting body and the rear connecting body are fastened together, the docking plates 19 are embedded in the docking grooves 12.

[0025] The rear fixing surface 16 is also provided with abutting surfaces 20 on the top and bottom. When the front connector and the rear connector are fastened together, the bottom surface of the connecting surface 8 abuts against the top surface of the abutting surface 20 located above, and the top surface of the locking surface 9 abuts against the bottom surface of the abutting surface 20 located below.

[0026] A lever is positioned forward at the front end of the connecting surface 8 corresponding to the snap-fit ​​hole 11. The lever is gradually raised from front to back. The top end of the rotating shaft 21 passes through the top end of the fixing sleeve 17. When the front connecting body and the rear connecting body are engaged, the top end of the rotating shaft 21 is embedded in the snap-fit ​​hole 11.

[0027] The front end of the connecting surface 8 is provided with a clamping block 14 corresponding to the snap-fit ​​groove 13. The clamping block 14 has a clamping snap-fit ​​groove 15 corresponding to the snap-fit ​​groove 13. When the front connecting body and the rear connecting body are engaged, the quick-release wrench 22 is inserted into the snap-fit ​​groove 13 and the clamping snap-fit ​​groove 15, and the movable end of the quick-release wrench 22 abuts against the front end of the clamping block 14. The clamping block 14 has a hollow structure.

[0028] The front wheel 3 has a diameter of 10 inches, and the rear wheel 5 has a diameter of 8 inches. Both the front wheel 3 and the rear wheel 5 are arranged in pairs, one on each side, and each rear wheel 5 is equipped with a brake device 25. A brake lever 26 is located at each end of the handle 24, and both brake levers 26 can control the brake device 25. Squeezing one brake lever 26 alone will stop the rear wheel 5, or squeezing both brake levers 26 simultaneously will provide greater force to the brake device 25 and stop the rear wheel 5 more quickly.

[0029] When the walking aid is needed, rotate the front frame 1 or the rear frame 4 around the screw 23 until the front connector and the rear connector are engaged, the mating groove 12 and the mating plate 19 correspond to each other, the mating plate 19 is embedded in the mating groove 12, and the lever is pulled upward so that the locking hole 11 is fitted onto the top of the rotating shaft 21, and the abutting surface 20 abuts against the connecting surface 8 and the locking surface 9. At this time, rotate the quick-release wrench 22 to insert the quick-release wrench 22 into the locking groove 13 and the tightening locking groove 15, and rotate the movable end of the quick-release wrench 22 so that the movable end of the quick-release wrench 22 abuts tightly against the tightening block 14.

[0030] This utility model enables quick connection or folding of the front frame 1 and rear frame 4 via a front connector and a rear connector, facilitating the storage and use of the bicycle. A mating groove 13 is provided on the connecting surface 8 and the locking surface 9, and a corresponding mating plate 19 is provided on the rear fixing surface, ensuring accurate mating between the front and rear connectors and guaranteeing the coaxiality of the front frame 1 and rear frame 4. A quick-release wrench 22 is used in conjunction with the front fixing surface 7 for quick disassembly and a tight connection.

[0031] The technical solutions provided by the embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of this utility model. The description of the above embodiments is only for helping to understand the principles of the embodiments of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A folding mechanism for a walking aid, comprising a front frame and a rear frame, wherein a steering rod is rotatably connected to the front end of the front frame, a handle is provided at the top end of the steering rod, and a front wheel is provided at the bottom end of the steering rod; a rear wheel is provided at the rear end of the rear frame, characterized in that: The rear end of the front frame and the front end of the rear frame are connected by a folding mechanism. The folding mechanism includes a front connecting body and a rear connecting body. The front connecting body includes a front fixing surface, a connecting surface, and a locking surface. The front fixing surface is perpendicularly fixed to the rear end face of the front frame. The connecting surface is perpendicularly positioned at the upper end of the front fixing surface, and the locking surface is perpendicularly positioned at the lower end of the front fixing surface. One end of the connecting surface has a connecting hole, and the other end has a locking hole. One end of the locking hole on the front fixing surface has an inwardly opening locking groove. The rear connecting body includes a rear fixing surface and a quick-release wrench. The rear fixing surface is perpendicularly connected to the front end face of the rear frame. A connecting sleeve is provided at one end of the rear fixed surface corresponding to the connecting hole, and a fixing sleeve is provided at one end corresponding to the snap-fit ​​hole. A rotating shaft is rotatably provided inside the fixing sleeve, and a rotating hole is opened in the middle of the fixing sleeve. The bottom end of the quick-release wrench passes through the rotating hole and is fixedly connected to the rotating shaft. The quick-release wrench can rotate laterally along the opening direction of the rotating hole. When the front connecting body and the rear connecting body are engaged, the connecting hole and the connecting sleeve are correspondingly provided and a male and female screw is inserted so that the front frame and the rear frame can rotate around the male and female screw as the axis. The quick-release wrench is embedded in the snap-fit ​​groove. When the quick-release wrench is tightened, the movable end of the quick-release wrench abuts against the rear end face of the front fixed surface.

2. The folding mechanism for a walking aid as described in claim 1, characterized in that: The front end of the connecting body and the middle of the locking surface are provided with docking grooves. The top and bottom ends of the rear fixing surface are provided with docking plates corresponding to the docking grooves. When the front connecting body and the rear connecting body are fastened together, the docking plates are embedded in the docking grooves.

3. The folding mechanism for a walking aid as described in claim 2, characterized in that: The rear fixing surface is also provided with abutting surfaces on the top and bottom. When the front connector and the rear connector are fastened together, the bottom surface of the connecting surface abuts against the top surface of the upper abutting surface, and the top surface of the locking surface abuts against the bottom surface of the lower abutting surface.

4. The folding mechanism for a walking aid as described in claim 1, characterized in that: A lever is positioned forward at the front end of the connector corresponding to the snap-fit ​​hole. The lever is gradually raised from front to back. The top of the rotating shaft passes through the top of the fixed sleeve. When the front connector and the rear connector are engaged, the top of the rotating shaft is embedded in the snap-fit ​​hole.

5. The folding mechanism for a walking aid as described in claim 1, characterized in that: The front end of the connecting surface is provided with a clamping block corresponding to the snap-fit ​​groove. The clamping block is provided with a clamping snap-fit ​​groove corresponding to the snap-fit ​​groove. When the front connecting body and the rear connecting body are engaged with each other, the quick-release wrench is embedded in the snap-fit ​​groove and the clamping snap-fit ​​groove, and the movable end of the quick-release wrench abuts against the front end of the clamping block.

6. The folding mechanism for a walking aid as described in claim 5, characterized in that: The clamping block has a hollow structure.

7. The folding mechanism for a walking aid as described in claim 1, characterized in that: The front wheel has a diameter of 10 inches, and the rear wheel has a diameter of 8 inches.

8. The folding mechanism for a walking aid as described in claim 7, characterized in that: Both the front and rear wheels are configured as two on the left and two on the right, and the rear wheels are equipped with a braking device.

9. The folding mechanism for a walking aid as described in claim 8, characterized in that: A brake lever is provided on each of the left and right ends of the handle, and both brake levers can control the braking device.

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