Folding mechanism
By designing a folding mechanism that utilizes the combination of steel ropes and springs, the wheelchair can be quickly folded and automatically reset and secured, solving the problem of inconvenient folding of existing wheelchairs and improving ease of use and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- MUXING (YONGKANG) MEDICAL TECH CO LTD
- Filing Date
- 2025-04-08
- Publication Date
- 2026-04-14
AI Technical Summary
Existing wheelchairs are difficult to fold quickly and effectively during use, and require manual fixing after folding, which affects storage and ease of use.
The folding mechanism is adopted. By pulling the steel rope, the indexing pin is disengaged from the limiting hole, the spring is stretched, and the limiting block is disengaged from the support frame. After that, the second support frame is rotated to approach the first support frame to complete the folding. When resetting, the limiting block is inserted into the support frame and the spring resets and fixes the support frame, thus achieving automatic fixation.
It enables quick folding and repositioning of the wheelchair, is easy to operate, ensures stability during use, and requires no additional fixation.
Smart Images
Figure CN224112918U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of folding equipment, specifically a folding mechanism. Background Technology
[0002] A wheelchair is a chair equipped with wheels that can help replace walking. It is an important mobility tool for the injured, sick, and disabled to use for home rehabilitation, transportation, medical treatment, and outdoor activities. Wheelchairs not only meet the mobility needs of people with limb disabilities and limited mobility, but more importantly, they facilitate the movement and care of family members, and enable patients to exercise and participate in social activities with the help of wheelchairs.
[0003] Existing wheelchairs are difficult to fold quickly and effectively during use, making it difficult to reduce their size quickly when not in use, which affects their placement and storage. At the same time, the wheelchair needs to be manually fixed after being folded to ensure normal use, which is inconvenient. Therefore, there is an urgent need for a device to solve the above problems. Utility Model Content
[0004] The purpose of this invention is to provide a folding mechanism to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a folding mechanism, including a first support frame, an armrest hinged to the outer side of the first support frame, a controller mounted on one side of the armrest for convenient control of wheelchair movement, a second support frame hinged to one side of the first support frame, a first support rod hinged to one side of the second support frame, the top of the first support rod hinged to the lower end of the armrest, a third support frame hinged to the lower end of the second support frame, a power supply for convenient power supply mounted on one side of the first support frame via bolts, a second support rod hinged to one side of the first support frame, a second support rod hinged to one side of the third support frame, a fixing mechanism for conveniently fixing the position of the second support frame between the lower end of the second support frame and the third support frame, the fixing mechanism including an indexing pin, a spring, a fixing ring, a steel rope, a limiting hole, and a limiting block, the indexing pin being movably inserted into one side of the third support frame, and the spring being fixed to... Between the indexing pin and the third support frame, the limiting block is fixed to the lower end of the second support frame. The lower end of the limiting block is a conical block, and the limiting hole is opened at the center of the limiting block. The limiting hole fits with one side of the indexing pin. The fixing ring is hinged to one side of the indexing pin, and the steel rope is fixedly sleeved on the outside of the fixing ring. When folding is required during use, the steel rope is pulled to move the indexing pin out of the limiting hole. At this time, the spring is stretched, and then the limiting block is moved out of the third support frame. Then, the second support frame is rotated around the hinge position between the third support frame and the second support frame, so that the third support frame is close to the first support frame, completing the folding work. When in use, the reset device is activated. At this time, the limiting block is inserted into the third support frame, and the conical end of the limiting block presses against the indexing pin, stretching the spring until the indexing pin is aligned with the limiting hole. At this time, the spring resets, driving the indexing pin to insert into the limiting hole. This fixes the third support frame and the second support frame, ensuring the stability of the wheelchair during use.
[0006] Preferably, the lower end of the first support frame is equipped with two power wheels to facilitate wheelchair movement. The power wheels are symmetrically installed on both sides of the lower end of the first support frame.
[0007] Preferably, the lower end of the third support frame is equipped with two steering wheels to facilitate wheelchair turning. The steering wheels are symmetrically installed on both sides of the lower end of the third support frame.
[0008] Preferably, a footboard is fixed to one side of the third support frame by bolts.
[0009] Preferably, the spring is sleeved on the outside of the indexing pin.
[0010] Preferably, there are two fixing mechanisms, symmetrically arranged on both sides of the lower end of the second support frame.
[0011] Compared with the prior art, the beneficial effects of this utility model are:
[0012] 1. When this utility model is used, if folding is required, pull the steel rope to move the indexing pin away from the limit hole. At this time, the spring is stretched. Then, move the limit block away from the third support frame. Then, rotate the second support frame around the hinge position between the third support frame and the second support frame so that the third support frame is close to the first support frame to complete the folding work. The operation is simple and convenient.
[0013] 2. When using the reset device of this utility model, the limiting block is inserted into the third support frame, and the conical end of the limiting block presses the indexing pin, causing the spring to be stretched until the indexing pin is aligned with the limiting hole. At this time, the spring resets, driving the indexing pin to be inserted into the limiting hole. This fixes the third support frame and the second support frame, ensuring the stability of the wheelchair during use. No additional fixing operation is required; simply insert the limiting block into the third support frame. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of a folding mechanism according to the present invention;
[0015] Figure 2 This is a bottom view of a folding mechanism according to the present invention;
[0016] Figure 3 This is a cross-sectional view of a folding mechanism according to the present invention;
[0017] Figure 4 This is an enlarged schematic diagram of a folding mechanism A according to the present invention.
[0018] In the diagram: 1. First support frame; 2. Handrail; 3. Controller; 4. First support rod; 5. Second support frame; 6. Second support rod; 7. Drive wheel; 8. Steering wheel; 9. Third support frame; 10. Pedal; 11. Power supply; 12. Limiting block; 13. Limiting hole; 14. Indexing pin; 15. Spring; 16. Fixing ring; 17. Steel rope. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] Please see Figure 1-4This utility model provides a folding mechanism, including a first support frame 1. An armrest 2 is hinged to the outer side of the first support frame 1. A controller 3 is bolted to one side of the armrest 2 for convenient control of wheelchair movement. A second support frame 5 is hinged to one side of the first support frame 1. A first support rod 4 is hinged to one side of the second support frame 5. The top end of the first support rod 4 is hinged to the lower end of the armrest 2. A third support frame 9 is hinged to the lower end of the second support frame 5. A pedal 10 is bolted to one side of the third support frame 9. A power supply mechanism is bolted to one side of the first support frame 1. The power supply 11 has a second support rod 6 hinged to one side of the first support frame 1, and the second support rod 6 is hinged to one side of the third support frame 9. There is a fixing mechanism between the lower end of the second support frame 5 and the third support frame 9 to facilitate fixing the position of the second support frame 5. There are two fixing mechanisms, symmetrically arranged on both sides of the lower end of the second support frame 5. The fixing mechanism includes an indexing pin 14, a spring 15, a fixing ring 16, a steel rope 17, a limiting hole 13, and a limiting block 12. The indexing pin 14 is movably inserted into one side of the third support frame 9, and the spring 15 is welded and fixed to the indexing pin 14 and the third support frame. Between 9, spring 15 is sleeved on the outside of indexing pin 14, and limiting block 12 is welded and fixed to the lower end of the second support frame 5. The lower end of limiting block 12 is a conical block, and limiting hole 13 is opened at the center of limiting block 12. Limiting hole 13 fits with one side of indexing pin 14. Fixing ring 16 is hinged to one side of indexing pin 14, and steel rope 17 is fixedly sleeved on the outside of fixing ring 16. If folding is required during use, pull steel rope 17 to move indexing pin 14 out of the limiting hole 13. At this time, spring 15 is stretched, and then limiting block 12 is moved out of the third support frame 5. Inside the frame 9, the second support frame 5 is rotated around the hinge position between the third support frame 9 and the second support frame 5, so that the third support frame 9 is close to the first support frame 1, completing the folding operation. When in use, the reset device is activated. At this time, the limiting block 12 is inserted into the interior of the third support frame 9, and the conical end of the limiting block 12 presses the indexing pin 14, causing the spring 15 to be stretched until the indexing pin 14 is aligned with the limiting hole 13. At this time, the spring 15 resets, driving the indexing pin 14 to be inserted into the limiting hole 13, thus fixing the third support frame 9 and the second support frame 5 to ensure the stability of the wheelchair during use.
[0021] The lower end of the first support frame 1 is equipped with two power wheels 7 for easy wheelchair movement. The power wheels 7 are symmetrically installed on both sides of the lower end of the first support frame 1.
[0022] The lower end of the third support frame 9 is equipped with two steering wheels 8 that facilitate wheelchair turning. The steering wheels 8 are symmetrically installed on both sides of the lower end of the third support frame 9.
[0023] Working principle: When folding is required during use, pull the steel cable 17 to move the indexing pin 14 out of the limiting hole 13. At this time, the spring 15 is stretched. Then, the limiting block 12 is moved out of the third support frame 9. After that, rotate the second support frame 5 around the hinge position between the third support frame 9 and the second support frame 5, so that the third support frame 9 is closer to the first support frame 1, completing the folding operation. When in use, the reset device is activated. At this time, the limiting block 12 passes into the third support frame 9, and the conical end of the limiting block 12 presses against the indexing pin 14, stretching the spring 15 until the indexing pin 14 is aligned with the limiting hole 13. At this time, the spring 15 resets, driving the indexing pin 14 into the limiting hole 13. This fixes the third support frame 9 and the second support frame 5, ensuring the stability of the wheelchair during use.
[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A folding mechanism, comprising a first support frame (1), characterized in that: A handrail (2) is hinged to the outside of the first support frame (1). A controller (3) is installed on one side of the handrail (2). A second support frame (5) is hinged to one side of the first support frame (1). A first support rod (4) is hinged to one side of the second support frame (5). The top of the first support rod (4) is hinged to the lower end of the handrail (2). A third support frame (9) is hinged to the lower end of the second support frame (5). A power supply (11) for convenient power supply is installed on one side of the first support frame (1) by bolts. A second support rod (6) is hinged to one side of the first support frame (1). One side of the second support rod (6) is hinged to one side of the third support frame (9). A convenient fastener is provided between the lower end of the second support frame (5) and the third support frame (9). The fixing mechanism for positioning the second support frame (5) includes an indexing pin (14), a spring (15), a fixing ring (16), a steel rope (17), a limiting hole (13), and a limiting block (12). The indexing pin (14) is movably inserted into one side of the third support frame (9). The spring (15) is fixed between the indexing pin (14) and the third support frame (9). The limiting block (12) is fixed at the lower end of the second support frame (5). The lower end of the limiting block (12) is a conical block. The limiting hole (13) is opened at the center of the limiting block (12). The limiting hole (13) fits into one side of the indexing pin (14). The fixing ring (16) is hinged to one side of the indexing pin (14). The steel rope (17) is fixedly sleeved on the outside of the fixing ring (16).
2. The folding mechanism according to claim 1, characterized in that: The lower end of the first support frame (1) is equipped with a power wheel (7) to facilitate wheelchair movement. There are two power wheels (7), which are symmetrically installed on both sides of the lower end of the first support frame (1).
3. A folding mechanism according to claim 2, characterized in that: The lower end of the third support frame (9) is equipped with a steering wheel (8) to facilitate wheelchair turning. There are two steering wheels (8), which are symmetrically installed on both sides of the lower end of the third support frame (9).
4. A folding mechanism according to claim 3, characterized in that: A footboard (10) is fixed to one side of the third support frame (9) by bolts.
5. A folding mechanism according to claim 4, characterized in that: The spring (15) is sleeved on the outside of the indexing pin (14).
6. A folding mechanism according to claim 5, characterized in that: There are two fixing mechanisms, which are symmetrically arranged on both sides of the lower end of the second support frame (5).