A folding wheelchair folding frame structure

Abstract

The utility model discloses a folding framework structure of folding wheelchair belongs to wheelchair field, including main framework, two main frameworks are left and right symmetrical settings, install the back folding mechanism for reducing the occupied space after folding on the main framework, install the anti -pinch hand mechanism for preventing wheelchair to be stored when pinch the user on the main framework, the back folding mechanism includes multistage folding subassembly, sliding assembly and locking assembly, multistage folding subassembly is connected with sliding assembly, and main framework and locking assembly all are connected with sliding assembly, and locking assembly is connected with main framework, and multistage folding subassembly is used for carrying out multistage folding to wheelchair back leaning position, and sliding assembly is used for moving multistage folding subassembly, and locking assembly is used for fixing sliding assembly, through above -mentioned mode, realize through anti -pinch hand mechanism prevents the hand of user when storing wheelchair and pinch, still realize the further reduction of the occupied space after folding to wheelchair.

Description

Technical Field

[0001] This utility model relates to the field of wheelchairs, specifically to a folding frame structure for a folding wheelchair. Background Technology

[0002] The folding wheelchair's frame structure is made of high-strength aluminum alloy or carbon fiber, and its multi-joint hinge design enables rapid folding and unfolding, balancing lightweight design and stability. Its core consists of a transverse X-shaped cross frame and a longitudinal main beam, which retracts via a central locking mechanism during folding, reducing its volume by more than 50% for easy storage and portability. The frame joints are equipped with self-lubricating bearings and anti-loosening screws to ensure structural rigidity even after repeated folding. Some models feature added cushioning pads at the joints to reduce vibration transmission and improve pushing comfort. This design maintains the support strength and safety of traditional wheelchairs while ensuring portability.

[0003] Chinese patent CN218187136U discloses a quick-folding wheelchair frame. Sliding rods are slidably connected to the exterior of two main frame bodies. Scissor rods connect the two sliding rods to the inner sides of the two main frame bodies. Two adjusting rods are installed between the two sliding rods and the two main frame bodies. Wheels are connected to the external pivot points of both main frame bodies. Footrests are rotatably connected to the front of each main frame body. Adjusting sleeves are fixedly installed at the outer ends of each main frame body near the footrests. Foot pedals are rotatably connected to the front of each footrest. Adjusting boxes are installed at the rear of each footrest near the foot pedals. This quick-folding wheelchair frame allows for simple and convenient folding and storage, effectively improving user efficiency and offering better future prospects. However, this device still has the following problems:

[0004] When folding a wheelchair, the upper sides of the scissor handles can easily pinch the user's hands against the main frame, causing inconvenience.

[0005] Based on this, the present invention designs a folding frame structure for a folding wheelchair to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a folding frame structure for a folding wheelchair.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A folding frame structure for a folding wheelchair, including a main frame;

[0009] The two main frame structures are symmetrically arranged on the left and right sides;

[0010] The main frame is equipped with a back folding mechanism to reduce the space occupied after folding.

[0011] The main frame is equipped with an anti-pinch mechanism to prevent the user from being pinched when the wheelchair is stored.

[0012] The back folding mechanism includes a multi-stage folding assembly, a sliding assembly, and a locking assembly; the multi-stage folding assembly is connected to the sliding assembly; the main frame and the locking assembly are both connected to the sliding assembly; the locking assembly is connected to the main frame; the multi-stage folding assembly is used to fold the backrest of the wheelchair in multiple stages; the sliding assembly is used to move the multi-stage folding assembly; and the locking assembly is used to fix the sliding assembly.

[0013] Furthermore, the multi-stage folding assembly includes a back folding mechanism and folding rods; the sides of two folding rods that are close to each other are respectively fixedly connected to both ends of the same back folding mechanism; one end of one folding rod that is close to the sliding component is fixedly connected to one end of another back folding mechanism, and the other end of this back folding mechanism is connected to the sliding component.

[0014] Furthermore, the sliding component includes a sliding block and a dovetail slider; the sliding block is fixedly connected to a back-folding mechanism; the sliding block is fixedly connected to the dovetail slider, and a dovetail groove is provided at the rear end of the main frame; the dovetail slider is slidably connected to the main frame through the dovetail groove; the dovetail slider is connected to a locking component.

[0015] Furthermore, the locking component includes a positioning pin; positioning grooves are provided on the upper rear end of the main frame and on the sliding block; the positioning pin is inserted into the main frame and the dovetail slider through the positioning groove.

[0016] Furthermore, the anti-pinch mechanism includes an X-shaped bracket, an anti-pinch component, and a limiting component; both the main frame and the anti-pinch component are connected to the X-shaped bracket; two sets of X-shaped brackets are arranged one in front of the other; the anti-pinch component is connected to the limiting component; the limiting component is connected to the main frame; the X-shaped bracket is used to fold and store the two main frames, the anti-pinch component is used to prevent pinching when the X-shaped bracket is stored, and the limiting component is used to limit the anti-pinch component.

[0017] Furthermore, the X-shaped bracket includes support rod one and support rod two; the lower end of support rod one is hinged to the left main frame, the lower end of support rod two is hinged to the right main frame, and support rod one and support rod two are hinged in the middle; the upper ends of support rod one and support rod two are both connected to the anti-pinch component.

[0018] Furthermore, the anti-pinch assembly includes a rotating shaft and a vertical shifting frame; the two rotating shafts are symmetrically arranged left and right, the front and rear ends of one rotating shaft are respectively rotatably connected to two support rods, and the front and rear ends of the other rotating shaft are respectively rotatably connected to two support rods; the upper end of the rotating shaft is fixedly connected to the vertical shifting frame; the vertical shifting frame is connected to the limiting assembly.

[0019] Furthermore, the two sets of limiting components are arranged symmetrically front to back.

[0020] Compared with the prior art, the advantages of this utility model are as follows: 1. This utility model can prevent the user's hand from being pinched when storing the wheelchair through an anti-pinch mechanism;

[0021] 2. This utility model can further reduce the space occupied by the wheelchair after folding, making it easier to carry the wheelchair when traveling. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This utility model discloses a three-dimensional folding frame structure for a folding wheelchair. Figure 1 ;

[0024] Figure 2 This is a front view of the folding frame structure of a folding wheelchair according to the present invention;

[0025] Figure 3 This utility model discloses a three-dimensional folding frame structure for a folding wheelchair. Figure 2 ;

[0026] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0027] The labels in the diagram represent:

[0028] 1. Main frame; 2. Back folding mechanism; 21. Multi-stage folding assembly; 211. Back folding mechanism; 212. Folding rod; 22. Sliding assembly; 221. Sliding block; 222. Dovetail slider; 223. Dovetail slide groove; 23. Locking assembly; 231. Positioning groove; 232. Positioning pin; 3. Anti-pinch mechanism; 31. X-shaped bracket; 311. Support rod one; 312. Support rod two; 32. Anti-pinch assembly; 321. Rotating shaft; 322. Vertical shifting frame; 33. Limiting assembly; 331. Limiting rod; 332. Limiting block. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0030] The terms "left," "right," "front," "back," "up," and "down" used in the following description refer to the orientation from the perspective of the front view.

[0031] Example 1: In some embodiments, please refer to the accompanying drawings. Figures 1-4 A folding frame structure for a folding wheelchair, comprising a main frame 1;

[0032] The two main frame members are symmetrically arranged on the left and right sides;

[0033] The main frame 1 is equipped with a back folding mechanism 2 to reduce the space occupied after folding;

[0034] The main frame 1 is equipped with an anti-pinch mechanism 3 to prevent the user from being pinched when the wheelchair is stored.

[0035] The backrest folding mechanism 2 includes a multi-stage folding assembly 21, a sliding assembly 22, and a locking assembly 23; the multi-stage folding assembly 21 is connected to the sliding assembly 22; the main frame 1 and the locking assembly 23 are both connected to the sliding assembly 22; the locking assembly 23 is connected to the main frame 1; the multi-stage folding assembly 21 is used to fold the backrest of the wheelchair in multiple stages; the sliding assembly 22 is used to move the multi-stage folding assembly 21; the locking assembly 23 is used to fix the sliding assembly 22.

[0036] In this invention, when the operator folds the main frame 1, the multi-level folding assembly 21 is first folded in multiple stages. Then, the sliding assembly 22 is used to slide the multi-level folding assembly 21 between the wheelchair wheels to reduce the storage volume. The main body of the main frame 1 is then stored using the anti-pinch mechanism 3. When the wheelchair needs to be unfolded, the anti-pinch mechanism 3 unfolds the main frame 1 while preventing the operator's hand from being pinched during unfolding. The sliding assembly 22 is then used to slide the multi-level folding assembly 21 to the upper rear side of the main frame 1, and the locking assembly 23 locks the sliding assembly 22. The multi-level folding assembly 21 is then used to unfold the wheelchair in multiple stages. This further reduces the space occupied by the folded wheelchair, making it easier to carry when traveling.

[0037] The multi-stage folding assembly 21 includes a back folding mechanism 211 and folding rods 212; the two folding rods 212 are respectively fixedly connected to the two ends of the same back folding mechanism 211 on their respective sides; one end of one folding rod 212 near the sliding assembly 22 is fixedly connected to one end of the other back folding mechanism 211, and the other end of this back folding mechanism 211 is connected to the sliding assembly 22.

[0038] The folding back mechanism 211 adopts existing technology in the field, such as a wheelchair folding back structure disclosed in Chinese Patent CN203169470U; it will not be described in detail here.

[0039] The sliding component 22 includes a sliding block 221 and a dovetail slider 222; the sliding block 221 is fixedly connected to a back folding mechanism 211; the sliding block 221 and the dovetail slider 222 are fixedly connected, and a dovetail groove 223 is provided at the rear end of the main frame 1; the dovetail slider 222 is slidably connected to the main frame 1 through the dovetail groove 223; the dovetail slider 222 is connected to the locking component 23.

[0040] The locking component 23 includes a positioning pin 232; a positioning groove 231 is provided on the upper rear end of the main frame 1 and the sliding block 221; the positioning pin 232 is inserted into the main frame 1 and the dovetail slider 222 through the positioning groove 231.

[0041] In this invention, when folding the wheelchair, the operator folds both folding rods 212 using the two back folding mechanisms 211, then pulls out the positioning pin 232 from the positioning groove 231, and slides the dovetail slider 222 downward along the dovetail slide groove 223, so that the back folding mechanism 211 and the folding rod 212 are located between the wheels of the wheelchair, thereby further reducing the space occupied by the folded wheelchair and making it easier to carry the wheelchair when traveling.

[0042] The anti-pinch mechanism 3 includes an X-shaped bracket 31, an anti-pinch component 32, and a limiting component 33; the main frame 1 and the anti-pinch component 32 are both connected to the X-shaped bracket 31; two sets of X-shaped brackets 31 are arranged one in front of the other; the anti-pinch component 32 is connected to the limiting component 33; the limiting component 33 is connected to the main frame 1; the X-shaped bracket 31 is used to fold and store the two main frames 1; the two sets of limiting components 33 are symmetrically arranged one in front of the other; the anti-pinch component 32 is used to prevent pinching when the X-shaped bracket 31 is stored; the limiting component 33 is used to limit the anti-pinch component 32.

[0043] The X-shaped bracket 31 includes a first support rod 311 and a second support rod 312; the lower end of the first support rod 311 is hinged to the left main frame 1, the lower end of the second support rod 312 is hinged to the right main frame 1, and the first support rod 311 and the second support rod 312 are hinged in the middle; the upper ends of the first support rod 311 and the second support rod 312 are both connected to the anti-pinch component 32.

[0044] The anti-pinch assembly 32 includes a rotating shaft 321 and a vertical shifting frame 322; the two rotating shafts 321 are symmetrically arranged left and right, the front and rear ends of one rotating shaft 321 are respectively rotatably connected to two support rods 311, and the front and rear ends of the other rotating shaft 321 are respectively rotatably connected to two support rods 312; the upper end of the rotating shaft 321 is fixedly connected to the vertical shifting frame 322; the vertical shifting frame 322 is connected to the limiting assembly 33;

[0045] The limiting component 33 includes a limiting rod 331 and a limiting block 332; the two limiting rods 331 are symmetrically arranged front and back, and both the upper and lower ends of the limiting rods 331 are fixedly connected to the main frame 1; the limiting block 332 is slidably connected to the limiting rod 331; the inner side of the limiting block 332 is fixedly connected to the vertical moving frame 322.

[0046] In this utility model, the operator presses the vertical moving frame 322 downward along the limiting rod 331. While the vertical moving frame 322 slides downward along the limiting rod 331, the two rotating shafts 321 rotate with the upper ends of the first support rod 311 and the second support rod 312. At the same time, the vertical moving frame 322 moves away from the upper ends of the first support rod 311 and the second support rod 312 through the rotating shafts 321, thus avoiding the situation where the rotating shafts 321 pinch the main frame 1 when it is opened.

[0047] The limiting block 332 is equipped with a cam lock to improve the stability of the wheelchair after unfolding and folding. The cam lock adopts existing mature technology in the field, such as a cam locking mechanism disclosed in Chinese Patent CN110115619B, which will not be described in detail here.

[0048] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A folding frame structure for a folding wheelchair, comprising a main frame (1), characterized in that: It also includes a back folding mechanism (2) and an anti-pinch mechanism (3); The two main frames (1) are set symmetrically on the left and right sides; The main frame (1) is equipped with a back folding mechanism (2) to reduce the space occupied after folding; The main frame (1) is equipped with an anti-pinch mechanism (3) to prevent the user from being pinched when the wheelchair is stored. The back folding mechanism (2) includes a multi-stage folding assembly (21), a sliding assembly (22), and a locking assembly (23); the multi-stage folding assembly (21) is connected to the sliding assembly (22); the main frame (1) and the locking assembly (23) are both connected to the sliding assembly (22); the locking assembly (23) is connected to the main frame (1); the multi-stage folding assembly (21) is used to fold the backrest of the wheelchair in multiple stages; the sliding assembly (22) is used to move the multi-stage folding assembly (21); the locking assembly (23) is used to fix the sliding assembly (22).

2. The folding frame structure of the folding wheelchair according to claim 1, characterized in that, The multi-stage folding assembly (21) includes a back folding mechanism (211) and folding rods (212); the two folding rods (212) are fixedly connected to the two ends of the same back folding mechanism (211) on their respective sides; one end of one folding rod (212) near the sliding assembly (22) is fixedly connected to one end of the other back folding mechanism (211), and the other end of this back folding mechanism (211) is connected to the sliding assembly (22).

3. The folding frame structure of the folding wheelchair according to claim 2, characterized in that, The sliding component (22) includes a sliding block (221) and a dovetail slider (222); the sliding block (221) is fixedly connected to a back folding mechanism (211); the sliding block (221) and the dovetail slider (222) are fixedly connected, and a dovetail groove (223) is provided at the rear end of the main frame (1); the dovetail slider (222) is limited and slidably connected to the main frame (1) through the dovetail groove (223); the dovetail slider (222) is connected to the locking component (23).

4. The folding frame structure of the folding wheelchair according to claim 3, characterized in that, The locking component (23) includes a positioning pin (232); a positioning groove (231) is provided on the upper rear side of the main frame (1) and the sliding block (221); the positioning pin (232) is inserted into the main frame (1) and the dovetail slider (222) through the positioning groove (231).

5. The folding frame structure of the folding wheelchair according to claim 1, characterized in that, The anti-pinch mechanism (3) includes an X-shaped bracket (31), an anti-pinch component (32), and a limiting component (33); the main frame (1) and the anti-pinch component (32) are both connected to the X-shaped bracket (31); two sets of X-shaped brackets (31) are arranged in front and behind; the anti-pinch component (32) is connected to the limiting component (33); the limiting component (33) is connected to the main frame (1); the X-shaped bracket (31) is used to fold and store the two main frames (1), the anti-pinch component (32) is used to prevent pinching when the X-shaped bracket (31) is stored, and the limiting component (33) is used to limit the anti-pinch component (32).

6. The folding frame structure of the folding wheelchair according to claim 5, characterized in that, The X-shaped bracket (31) includes a first support rod (311) and a second support rod (312); the lower end of the first support rod (311) is hinged to the left main frame (1), the lower end of the second support rod (312) is hinged to the right main frame (1), and the first support rod (311) and the second support rod (312) are hinged in the middle; the upper ends of the first support rod (311) and the second support rod (312) are both connected to the anti-pinch component (32).

7. The folding frame structure of the folding wheelchair according to claim 6, characterized in that, The anti-pinch assembly (32) includes a rotating shaft (321) and a vertical shifting frame (322); the two rotating shafts (321) are symmetrically arranged left and right, the front and rear ends of one rotating shaft (321) are rotatably connected to two support rods (311) respectively, and the front and rear ends of the other rotating shaft (321) are rotatably connected to two support rods (312) respectively; the upper end of the rotating shaft (321) is fixedly connected to the vertical shifting frame (322); the vertical shifting frame (322) is connected to the limiting assembly (33).

8. The folding frame structure of the folding wheelchair according to claim 5, characterized in that, The two sets of limiting components (33) are symmetrically arranged front and back.

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