Folding wheelchair capable of adjusting buffering force

Abstract

The utility model provides a folding wheelchair capable of adjusting buffering force, which relates to the technical field of wheelchair equipment and comprises a seat frame and a buffering component. A backrest frame is hinged to the seat frame, a rear frame is hinged to the backrest frame, a front frame is hinged to the rear frame, the upper end of the buffering assembly is hinged to the seat frame, and the lower end of the buffering assembly is hinged to the front frame. The buffering assembly comprises an upper buffering support and a lower buffering support which are connected, the upper end of the upper buffering support is hinged to the lower end face of the seat frame, the lower end of the lower buffering support is hinged to the front frame, and the upper buffering support and the lower buffering support are sleeved with buffering springs. The folding wheelchair has the beneficial effects that the folding wheelchair can achieve a better buffering effect through the arrangement of the buffering assembly, so that the impact force generated when the wheelchair vibrates is absorbed and buffered, and the riding comfort of a user is improved; besides, the tightness degree of the buffer spring can be adjusted by rotating the knob according to the use requirements of a user, so that different buffer effects are achieved, and the structure is ingenious.

Description

Technical Field

[0001] The utility model relates to the technical field of wheelchair equipment, in particular to a folding wheelchair with adjustable buffering force. Background Art

[0002] A wheelchair is a chair with wheels that can assist with walking. It comes in electric and manual folding versions. It is an important means of mobility for the injured and sick, for home rehabilitation, transportation, medical appointments, and outings. It not only provides mobility for those with limited mobility, but more importantly, it facilitates family members' mobility and care, allowing patients to exercise and participate in social activities.

[0003] In the prior art, the technical solution of a Chinese patent document (Announcement No.: CN2093622U, Patent Name: Folding Wheelchair) discloses that "it mainly includes a frame, front wheels, rear wheels, pedals, a seat cushion, a backrest, armrests and handlebars. The frame consists of a front frame, a middle frame and a rear frame. The lower part of the middle frame is rotatably connected to the lower parts of the front and rear frames. The rear wheel is connected to the rear frame via an axle locking sleeve. The pedals are mounted on a pedal bracket, which can be folded upward. The pedal bracket is connected to the front frame."

[0004] Combined with the description and drawings of the patent document, the wheelchair does not have a cushioning effect. When the wheelchair moves on uneven ground, the wheelchair is prone to shaking. The impact force caused by these shaking will be directly transmitted to the user through the seat cushion, resulting in a poor riding experience for the user. Utility Model Content

[0005] The utility model overcomes the shortcomings of the prior art and provides a folding wheelchair with adjustable buffering force. By providing a buffering component, the folding wheelchair can achieve a better buffering effect and improve the user's comfort.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] A folding wheelchair with adjustable buffering force comprises a seat frame and a buffer assembly; the seat frame is hinged to a backrest frame, the backrest frame is hinged to a rear frame, the rear frame is hinged to a front frame, the upper end of the buffer assembly is hinged to the seat frame, and the lower end of the buffer assembly is hinged to the front frame.

[0008] Furthermore, the buffer assembly includes a buffer upper support and a buffer lower support that are connected to each other, the upper end of the buffer upper support is hinged to the lower end surface of the seat frame, the lower end of the buffer lower support is hinged to the front frame, the buffer upper support and the buffer lower support are outer-connected with a buffer spring, and the buffer upper support is provided with an adjustment assembly for controlling the tightness of the buffer spring.

[0009] Further, the adjusting component includes a knob rotatably connected to the upper buffer support and an external thread provided on the surface of the upper buffer support, and the knob is used in cooperation with the external thread.

[0010] Further, a pad is provided on the lower buffer support, the buffer spring is located above the pad, and the longitudinal projection area of the pad and the knob is larger than the longitudinal projection area of the buffer spring.

[0011] Further, a clip is further included. The clip is connected to the lower end surface of the seat frame. A first mounting hole is provided on the clip. A first screw post is connected to the first mounting hole. A first nut is connected to the first screw post in a matching manner. A first bushing is sleeved on the first screw post. First washers are provided on both sides of the first bushing. A first through hole is provided at the upper end of the upper buffer support, and the first bushing is installed in the first through hole.

[0012] Further, a second through hole is provided at the lower end of the lower buffer support, an internally threaded nut post is provided on the front frame, a second screw post is connected to the second through hole, the second screw post is used in cooperation with the internally threaded nut post, a second bushing is sleeved on the second screw post, the second bushing is installed in the second through hole, and second washers are provided on both sides of the second bushing.

[0013] Further, a connecting circular tube is provided on the lower end surface of the seat frame. The clip includes an arc-shaped plate provided at the top, the arc-shaped plate is in matching connection with the connecting circular tube, and a second screw hole is provided on the arc-shaped plate.

[0014] Further, a plurality of concave arc surfaces are provided on the edge of the knob, convex arc surfaces are provided between adjacent concave arc surfaces, and the concave arc surfaces and the convex arc surfaces are connected in sequence.

[0015] Further, the lower end of the backrest frame is hinged to the middle position of the rear frame, the front end of the rear frame is hinged to the upper end of the front frame, a front wheel is provided at the lower end of the front frame, the rear end of the seat frame is hinged to the middle position of the lower end of the backrest frame, the front end of the seat frame is hinged to the front end of the rear frame, and a rear wheel is provided at the rear end of the rear frame.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] By providing a buffer component, this folding wheelchair can achieve a good buffer effect, absorb and buffer the impact force generated when the wheelchair shakes, thereby improving the comfort of the user when sitting; in addition, according to the user's usage requirements, the tightness of the buffer spring can be adjusted by rotating the knob, so as to obtain different buffer effects, and the structure is ingenious. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings are used to provide a further understanding of the present utility model, and are used together with the embodiments of the present utility model to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0019] Figure 1 is the overall view of the foldable wheelchair with adjustable buffering force according to the embodiment of the present utility model;

[0020] Figure 2 is the structural schematic diagram of the buffering component according to the embodiment of the present utility model;

[0021] Figure 3 is the exploded view of the buffering component according to the embodiment of the present utility model;

[0022] Figure 4 is the enlarged view of the knob according to the embodiment of the present utility model.

[0023] In the figure: 1-backrest frame, 2-seat frame, 3-front frame, 4-rear frame, 5-buffering component, 51-upper buffering support, 52-lower buffering support, 53-buffering spring, 6-knob, 61-concave arc surface, 62-convex arc surface, 7-code clip, 71-first mounting hole, 72-arc plate, 8-first screw post, 9-first nut, 10-first bushing, 11-first washer, 12-inner thread nut post, 13-second screw post, 14-second bushing, 15-second washer, 16-connecting round tube, 17-support pad, 18-front wheel, 19-rear wheel. Detailed implementation manners

[0024] The following describes the preferred embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model.

[0025] As Figures 1 to 4 shown, a foldable wheelchair with adjustable buffering force includes a seat frame 2 and a buffering component 5; the seat frame is hinged with a backrest frame 1, the backrest frame 1 is hinged with a rear frame 3, the rear frame 3 is hinged with a front frame 3, the lower end of the backrest frame 1 is hinged at the middle position of the rear frame 4, the front end of the rear frame 4 is hinged with the upper end of the front frame 3, the lower end of the front frame 3 is provided with a front wheel 18, the rear end of the seat frame 2 is hinged at the middle position of the lower end of the backrest frame 1, the front end of the seat frame 2 is hinged with the front end of the rear frame 4, the rear end of the rear frame 4 is provided with a rear wheel 19. When the wheelchair is in use, pushing the wheelchair through the front wheel 18 and the rear wheel 19 can drive the wheelchair to move. When the wheelchair is not in use, through the hinged connection method, the backrest frame 1, the seat frame 2, the front frame 3 and the rear frame 4 can be folded up, which is convenient for storage and saves space. The above is the existing technology of the current foldable wheelchair and will not be elaborated here. The design point of this foldable wheelchair is that it has a buffering component 5. The upper end of the buffering component 5 is hinged with the seat frame 2, and the lower end of the buffering component 5 is hinged with the front frame 3. The buffering component 5 is connected with the seat frame 2 and the front frame 3 through the hinged method respectively, so as not to affect the folding setting of the seat frame 2 and the front frame 3.

[0026] Specifically, the buffer component 5 includes a buffer upper support 51 and a buffer lower support 52 which are connected and arranged. The upper end of the buffer upper support 51 is hinged to the lower end surface of the seat frame 2, and the lower end of the buffer lower support 52 is hinged to the front frame 3.

[0027] The specific connection method between the buffer upper support 51 and the seat frame 2 is that a first perforation (not shown) is provided at the upper end of the buffer upper support 51. It further includes a code clip 7 which is connected to the lower end surface of the seat frame 2. A first mounting hole 71 is provided on the code clip 7. A first screw post 8 is connected to the first mounting hole 71. The first screw post 8 is matingly connected with a first nut 9. A first bushing 10 is sleeved on the first screw post 8. The first bushing 10 is rotatably connected to the first screw post 8. The first bushing 10 is installed in the first perforation. The aperture of the first perforation is larger than the outer diameter of the first bushing 10. Therefore, the buffer upper support 51 can be rotatably connected to the first bushing 10. First washers 11 are provided on both sides of the first bushing 10. The first washers 11 are made of rubber material. From Figure 2 It can be seen that the first washers 11 play a role in protecting both sides of the upper end of the buffer upper support 51, preventing the two sides of the upper end of the buffer upper support 51 from coming into contact with the code clip 7 and causing wear or generating noise.

[0028] The method of connecting the buffer upper support 51 to the code clip 7 is as follows: First, install the first bushing 10 into the first perforation. Then, horizontally insert the first screw post 8 into the first mounting hole 71 on one side of the code clip 7, the first washer 11 on one side, the first bushing 10, the first washer 11 on the other side, and the first mounting hole 71 on the other side of the code clip 7 in sequence. Then, screw the first nut 9 onto the end of the first screw post 8, and the buffer upper support 51 can be hinged to the code clip 7.

[0029] A connecting round tube 16 is welded to the lower end surface of the seat frame 2. The code clip 7 includes an arc-shaped plate 72 provided at the top. From Figure 3 It can be seen that the arc-shaped plate 72 is matched and connected to the connecting round tube 16, that is, the radian of the outer surface is matched and they can be closely connected together. A second screw hole (not shown) is provided on the arc-shaped plate 72. By driving a screw from the bottom up into the second screw hole and tightening it onto the connecting round tube 16, the code clip 7 can be fixed to the connecting round tube 16. The surface of the connecting round tube 16 is designed to match the arc-shaped plate 72, enabling the code clip 7 to be firmly fixed to the connecting round tube 16 without moving left and right and causing loosening.

[0030] The specific connection manner between the lower buffer support 52 and the front frame 3 is that a second perforation (not shown) is provided at the lower end of the lower buffer support 52. An internally threaded nut column 12 is welded and fixed on the front frame 3. A second screw column 13 is connected to the second perforation. The second screw column 13 is used in combination with the internally threaded nut column 12. A second bushing 14 is sleeved on the second screw column 13. The second bushing 14 is installed in the second perforation. Second washers 15 are provided on both sides of the second bushing 14. The second washers 15 are made of plastic material. Combined Figure 2 with Figure 3 it can be seen that the second washers 15 are located on the left and right sides of the lower end of the lower buffer support 51, preventing the lower end of the lower buffer support 51 from directly contacting the second screw column 13 or the internally threaded nut column 12 and causing wear. The connection manner of the lower buffer support 52 is to first install the second bushing 14 into the second perforation. The aperture of the second perforation is larger than the outer diameter of the second bushing 14. Therefore, the lower buffer support 51 can be rotatably connected to the second bushing 14. Then, horizontally pass the second screw column 13 through the second washer 15 and the second bushing 14 in sequence, and then tighten and connect it to the internally threaded nut column 12, thus hinging the lower buffer support 52 to the front frame 3.

[0031] A buffer spring 53 is sleeved outside the upper buffer support 51 and the lower buffer support 52. An adjusting component for controlling the tightness of the buffer spring 53 is provided on the upper buffer support 51. The adjusting component includes a knob 6 rotatably connected to the upper buffer support 51 and external threads (not shown) provided on the surface of the upper buffer support 51. The knob 6 is used in combination with the external threads. By rotating the knob 6, the lifting and lowering of the knob 6 on the upper buffer support 51 can be controlled, thereby adjusting the compression degree of the buffer spring 53 according to the user's usage requirements, achieving the purpose of adjusting the buffer tightness, and obtaining different buffer effects.

[0032] A support pad 17 is provided on the lower buffer support 51. The buffer spring 53 is located above the support pad 17. The support pad 17 has a supporting effect on the buffer spring 53. The longitudinal projection area of the support pad 17 and the knob 6 is larger than the longitudinal projection area of the buffer spring 53, so that the buffer spring 53 is limited between the support pad 17 and the knob 6 and will not break away upward or downward, and the structure is stable.

[0033] From Figure 4 it can be seen that a number of concave arc surfaces 61 are provided on the edge of the knob 6. Convex arc surfaces 62 are provided between adjacent concave arc surfaces 61. The concave arc surfaces 61 and the convex arc surfaces 62 are connected in sequence, so that the knob 6 forms a smooth star shape. This is beneficial for the user to hold the knob 6 and rotate it, and it is not easy to slip, and the touch is also smooth and comfortable.

[0034] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A folding wheelchair with adjustable cushioning force, characterized in that: The invention comprises a seat frame (2) and a buffer assembly (5); the seat frame (2) is hinged to a backrest frame (1), the backrest frame (1) is hinged to a rear frame (4), the rear frame (4) is hinged to a front frame (3), the upper end of the buffer assembly (5) is hinged to the seat frame (2), and the lower end of the buffer assembly (5) is hinged to the front frame (3); the buffer assembly (5) comprises a buffer upper support (51) and a buffer lower support (52) which are connected and arranged, the upper end of the buffer upper support (51) is hinged to the lower end surface of the seat frame (2), the lower end of the buffer lower support (52) is hinged to the front frame (3), the outer shells of the buffer upper support (51) and the buffer lower support (52) are connected with a buffer spring (53), and the buffer upper support (51) is provided with an adjustment assembly for controlling the tightness of the buffer spring (53).

2. The foldable wheelchair with adjustable cushioning force according to claim 1, characterized in that: The adjustment assembly comprises a knob (6) rotatably connected to the buffer upper support (51) and an external thread provided on the surface of the buffer upper support (51), and the knob (6) and the external thread are used in conjunction with each other.

3. The foldable wheelchair with adjustable cushioning force according to claim 2, characterized in that: The buffer lower support (52) is provided with a supporting pad (17), the buffer spring (53) is located above the supporting pad (17), and the longitudinal projection area of the supporting pad (17) and the knob (6) is larger than the longitudinal projection area of the buffer spring.

4. The foldable wheelchair with adjustable cushioning force according to claim 1, characterized in that: The utility model further comprises a code clamp (7), wherein the code clamp (7) is connected to the lower end surface of the seat frame (2), a first mounting hole (71) is provided on the code clamp (7), a first screw column (8) is connected to the first mounting hole (71), a first screw column (8) is matched with a first nut (9), a first bushing (10) is sleeved on the first screw column (8), first washers (11) are provided on both sides of the first bushing (10), a first through hole is provided at the upper end of the buffer upper support (51), and the first bushing (10) is installed in the first through hole.

5. The foldable wheelchair with adjustable cushioning force according to claim 1, characterized in that: The lower end of the buffer lower support (52) is provided with a second through hole, an internal thread nut column (12) is provided on the front frame (3), a second screw column (13) is connected to the second through hole, the second screw column (13) and the internal thread nut column (12) are used in conjunction with each other, a second bushing (14) is sleeved on the second screw column (13), the second bushing (14) is installed in the second through hole, and second washers (15) are provided on both sides of the second bushing (14).

6. The foldable wheelchair with adjustable cushioning force according to claim 4, characterized in that: The lower end surface of the seat frame (2) is provided with a connecting circular tube (16), and the code clamp (7) includes an arc-shaped plate (72) provided at the top end, the arc-shaped plate (72) is matched with the connecting circular tube (16), and a second screw hole is provided on the arc-shaped plate (72).

7. The foldable wheelchair with adjustable cushioning force according to claim 2, characterized in that: The edge of the knob (6) is provided with a plurality of concave arc surfaces (61), and a convex arc surface (62) is provided between adjacent concave arc surfaces (61), and the concave arc surfaces (61) and the convex arc surfaces (62) are connected in sequence.

8. The foldable wheelchair with adjustable cushioning force according to claim 1, characterized in that: The lower end of the backrest frame (1) is hinged to the middle position of the rear frame (4), the front end of the rear frame (4) is hinged to the upper end of the front frame (3), and the lower end of the front frame (3) is provided with a front wheel (18); the rear end of the seat frame (2) is hinged to the middle position of the lower end of the backrest frame (1), the front end of the seat frame (2) is hinged to the front end of the rear frame (4), and the rear end of the rear frame (4) is provided with a rear wheel (19).

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