Lightweight adjustable wheelchair

Abstract

Two side supports of a frame body are oppositely arranged, a seat plate support is installed on the upper portions of the two side supports, each side support is provided with two transverse rods arranged up and down and two vertical rods arranged front and back, and the distance between the two transverse rods is 1 / 4-1 / 2 of the diameter of a rear wheel. The rear wheel is fixedly connected with the rear end of the side bracket; the front end and the rear end of the handrail support are connected with the front end and the rear end of the side support respectively, the handrail support and the side support form clamping connection at the front end, clamping connection and rotating connection at the rear end, after the front end clamping connection is removed, the handrail support turns over backwards with the rotating connection point of the rear end as the center, and after the front end clamping connection and the rear end clamping connection are removed, the handrail support is separated from the side support. The side supports of the frame body are compact in structure, material consumption is reduced, the weight is light, the distance between the transverse rods and the installation position of the rear wheel and the side supports can meet the structural strength, and the handrail supports can be rapidly detached and separated from the side supports while being overturned backwards.

Description

Technical Field

[0001] This utility model relates to wheelchairs, and more particularly to a lightweight adjustable wheelchair. Background Technology

[0002] Wheelchairs are a means of transportation for people with mobility impairments. They can be operated by the person sitting down or pushed by others. Therefore, if a wheelchair is too heavy, it will be difficult to use, especially for non-electric wheelchairs, where it is very strenuous for the person sitting down to turn the wheels.

[0003] On the other hand, some users have particular difficulty moving their legs and feet. Even when they reach the wheelchair with the help of others, they still face the challenge of turning around and sitting down on their own. Therefore, wheelchairs need to be further improved to meet the needs of special groups. Utility Model Content

[0004] Purpose of the utility model: The purpose of this utility model is to provide a lightweight wheelchair that meets the user's needs for easy seating.

[0005] Technical solution: A lightweight adjustable wheelchair includes a frame body with side supports, armrest supports, and seat supports. The two side supports are arranged opposite each other, and the seat supports are installed on the upper part of the two side supports. Each side support has two horizontal bars arranged vertically and two vertical bars arranged front and back. The distance between the two horizontal bars is 1 / 4 to 1 / 2 of the diameter of the rear wheel. The rear wheel is connected and fixed to the rear end of the side support.

[0006] Furthermore, the front and rear ends of the handrail bracket are respectively connected to the front and rear ends of the side bracket. The handrail bracket and the side bracket form a snap-fit ​​connection at the front end and a snap-fit ​​and rotational connection at the rear end. After the front snap-fit ​​is released, the handrail bracket flips backward with the rotational connection point at the rear end as the center. After the front and rear snap-fits are released, the handrail bracket separates from the side bracket.

[0007] Furthermore, a vertical positioning tube is provided at the front end of the side support. An opening A is provided at the upper end of the positioning tube. A retaining spring A is placed inside the vertical tube A at the front end of the handrail support. The retaining spring A is U-shaped with its opening facing downwards. One of its vertical plates A has positioning posts A and B arranged vertically on its outer surface. The positioning posts A and B pass through the outer wall of the vertical tube A. The end of the other vertical plate B is fixed to the wall of the vertical tube A. A snap-fit ​​plate A is located outside the vertical tube A. The upper part of the snap-fit ​​plate A is horizontally connected to the vertical tube A by a fixing pin A, which passes horizontally through the bottom of the U-shape of the retaining spring A. The snap-fit ​​plate A can rotate towards the vertical tube A with the fixing pin A as the rotation connection point. The positioning posts A face the inner side of the snap-fit ​​plate A. The lower end of the vertical tube A is inserted into the opening A. The positioning posts B engage with the positioning holes A on the positioning tube. This forms a snap-fit ​​connection between the front end of the handrail support and the front end of the side support.

[0008] Furthermore, a mounting base is provided between the lower end of the vertical tube B at the rear end of the handrail support and the side support. The mounting base includes a fixed base, a retaining spring B, a fixing pin B, and a snap-fit ​​plate B. The lower end of the fixed base is rotatably connected to the rear end of the side support by a pivot pin passing laterally through it. An opening B is provided at the upper end of the fixed base. A retaining spring B is placed inside the vertical tube B at the rear end of the handrail support. The retaining spring B is U-shaped with its opening facing downwards. Positioning posts C and D are arranged vertically on the outer surface of one of its vertical plates C. The positioning posts C and D pass through... With the wall of the vertical tube B facing outwards, the other end of the vertical plate D is fixed to the wall of the vertical tube B. The snap-fit ​​plate B is located outside the vertical tube B. The upper part of the snap-fit ​​plate B is horizontally connected to the vertical tube B by a fixing pin B, and the fixing pin B is horizontally inserted into the U-shaped bottom of the snap ring B. The snap-fit ​​plate B can rotate towards the vertical tube B with the fixing pin B as the rotation connection point. The positioning post C faces the inside of the snap-fit ​​plate B. The lower end of the vertical tube B is inserted into the opening B, and the positioning post D engages with the positioning hole B on the fixing seat. The front end of the handrail bracket is snap-fitted to the front end of the side bracket. In addition to being able to flip backwards with the rear rotation connection point as the center, the handrail bracket and the side bracket can also be quickly disassembled and separated.

[0009] Ideally, the snap-fit ​​plate A is a rigid plastic part with a certain strength to meet the pressing operation, and the lower side of the outer end of the positioning post B is set as an inclined surface A to avoid interference between the positioning post B and the wall of the positioning tube when the positioning post B is inserted into the positioning hole A and detached from the positioning hole A.

[0010] Ideally, the snap-fit ​​plate B is a rigid plastic part with a certain strength to meet the pressing operation, and the lower side of the outer end of the positioning post D is set as an inclined surface B to avoid interference between the positioning post D and the wall of the fixing seat when it is inserted into the positioning hole B and detached from the positioning hole B.

[0011] Furthermore, the side bracket is connected to the rear wheel by bolts or quick-release detachers. At least two sleeves are provided on the side bracket along its height direction, and the bolts or quick-release detachers pass through these sleeves for fixation. By selecting sleeves of different heights, the overall height of the vehicle frame relative to the ground can be adjusted.

[0012] Furthermore, the side bracket is fixedly installed with the front wheel clamp arm support, or can be installed and removed with bolts.

[0013] Beneficial effects: The advantages of this utility model are: the side bracket structure constituting the main body of the frame is compact, uses less material, and is lightweight, but the spacing between the crossbars and the installation position with the rear wheel ensure that the side bracket can meet the structural strength requirements; the armrest bracket can be flipped backward, and there is no armrest bracket blocking the side of the wheelchair, making it convenient for the passenger to sit on the seat from the side of the wheelchair in a side-facing posture. Compared with sitting from the front of the wheelchair, the body turning range is smaller. The snap-fit ​​connection between the front end of the armrest bracket and the front end of the side bracket can maintain a reliable connection and facilitate the release of the snap-fit. The snap-fit ​​connection between the front end of the armrest bracket and the front end of the side bracket, as well as the snap-fit ​​and rotational connection between the rear end of the armrest bracket and the rear end of the side bracket, can allow the armrest bracket to be flipped backward while also allowing the armrest bracket to be quickly removed from the side bracket. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the wheelchair structure in Example 1;

[0015] Figure 2 for Figure 1 A diagram illustrating the backward flipping of the handrail;

[0016] Figure 3 for Figure 1 Schematic diagram showing the connection between the front end of the center armrest support and the front end of the side support;

[0017] Figure 4 for Figure 1 Schematic diagram showing the connection between the rear end of the center armrest support and the rear end of the side support;

[0018] Figure 5 for Figure 3 , 4 Exploded view of the connection section;

[0019] Figure 6 for Figure 5 Sectional view of the card assembly;

[0020] Figure 7 for Figure 3 , 4 Side view and schematic diagram of the connection between the rear wheel and the side bracket;

[0021] Figure 8 This is a schematic diagram of the wheelchair structure in Example 2;

[0022] Figure 9 for Figure 8 Schematic diagram of the connection between the front center wheel and the side bracket;

[0023] Figure 10 for Figure 8 Schematic diagram of the connection between the rear wheel and the side bracket. Detailed Implementation

[0024] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0025] Example 1

[0026] A lightweight, adjustable wheelchair, as shown in the attached image. Figure 1 , 2 As shown, the vehicle includes a frame body with side supports 1, armrest supports 2, and seat supports 3. Two side supports 1 are arranged opposite each other, and the seat supports 3 are mounted on top of the two side supports 1. Each side support 1 has two horizontal bars 11 arranged vertically and two vertical bars 12 arranged front-to-back, forming a rectangular frame. The rear wheel 7 is connected and fixed to the rear end of the side support 1. The distance between the two horizontal bars 11 is 1 / 4 to 1 / 2 of the diameter of the rear wheel 7. The center of the rear wheel is positioned close to the lower horizontal bar in height relative to the mounting position of the side support. Compared to structures with larger spacing between horizontal bars, the side support uses less material and is lighter, but the spacing between the horizontal bars and the mounting position relative to the rear wheel ensure that the side support meets structural strength requirements.

[0027] Each side support 1 is equipped with an armrest support 2. The front and rear ends of the armrest support 2 are connected to the front and rear ends of the side support 1, respectively. The front end of the armrest support 2 is engaged with the front end of the side support 1, and the rear end of the armrest support 2 is engaged and rotated with the rear end of the side support 1. Not only does the armrest support 2 flip backward with the rotation connection point at the rear end after the front engagement is released, but the side of the wheelchair is also unobstructed, allowing the passenger to sit on the seat from the side of the wheelchair in a sideways posture. Compared to sitting from the front of the wheelchair, the range of body turning is smaller. Moreover, after the front and rear engagements are released, the armrest support 2 separates from the side support 1.

[0028] Appendix Figure 3 , 5Figure 7 shows the snap-fit ​​connection structure formed between the front end of the handrail bracket 2 and the front end of the side bracket 1. The front end of the side bracket 1 is provided with a vertical positioning tube 4, with an opening A41 at the upper end. A retaining spring A22 is placed inside the vertical tube A21 at the front end of the handrail bracket 2. The retaining spring A22 is a U-shaped spring with its opening facing downwards. One vertical plate A221 of the retaining spring A22 has positioning posts A223 and B224 on its outer surface. The positioning posts A223 and B224 are arranged vertically at different heights. The positioning posts A223 and B224 pass through the outer wall of the vertical tube A21. The other vertical plate B222 of the retaining spring A22 is connected to the end of the vertical tube A21. The wall is fixed, and the snap-fit ​​plate A23 is located outside the vertical tube A21. The upper part of the snap-fit ​​plate A23 is connected to the vertical tube A21 by a fixing pin A24 passing through it laterally. The fixing pin A24 passes through the U-shaped bottom of the snap spring A22 laterally. The snap-fit ​​plate A23 is connected to the vertical tube A21. The positioning post A223 faces the inside of the snap-fit ​​plate A23. When the lower part of the snap-fit ​​plate A23 is pressed, the snap-fit ​​plate A23 rotates towards the vertical tube A21 with the fixing pin A24 as the rotation connection point. The lower end of the vertical tube A21 is inserted into the opening A41, and the positioning post B224 engages with the positioning hole A42 on the positioning tube 4. Pressing the lower part of the snap-fit ​​plate A23 towards the vertical tube A21 causes the snap-fit ​​plate A23 to act on the positioning post A223, causing it to retract into the vertical tube A21. This causes the vertical plate A221 of the snap-fit ​​spring A22 to swing inward into the vertical tube A21 to a certain extent, with the bottom of the U-shape as the fixed point. At this point, the positioning post B224 retracts from the positioning hole A42 into the positioning tube 4, and the snap-fit ​​between the front end of the handrail bracket 2 and the front end of the side bracket 1 is released. The snap-fit ​​plate A23 is made of rigid plastic and has a certain strength. The lower side of the outer end of the positioning post B224 is set as a slope A225 to avoid interference between the positioning post B224 and the wall of the positioning tube 4 when it is inserted into or detached from the positioning hole A42.

[0029] Appendix Figures 4-7The diagram shows the snap-fit ​​and rotatable connection structure between the rear end of the handrail bracket 2 and the rear end of the side bracket 1. A mounting base 6 is provided between the lower end of the vertical tube B24 at the rear end of the handrail bracket 2 and the side bracket 1. The mounting base 6 includes a fixed base 61, a retaining spring B62, a fixing pin B63, and a snap-fit ​​plate B64. The lower part of the fixed base 61 is rotatably connected to the rear end of the side bracket 1 by a horizontally inserted shaft pin 5. An opening B611 is provided at the upper end of the fixed base 61. The retaining spring B62 is placed inside the vertical tube B25 at the rear end of the handrail bracket 2. The retaining spring B62 is a U-shaped spring with its opening facing downwards. Positioning posts C623 and D624 are located on the outer surface of one vertical plate C621 of the retaining spring B62. The positioning posts C623 and D624 are arranged vertically at different heights. 4. The other vertical plate D622 of the snap ring B62 is fixed to the wall of the vertical pipe B25. The snap plate B64 is located outside the vertical pipe B25. The upper part of the snap plate B64 is connected to the vertical pipe B25 by a fixing pin B63. The fixing pin B63 is horizontally inserted into the U-shaped bottom of the snap ring B62. The snap plate B64 is connected to the vertical pipe B25. The positioning post C623 faces the inside of the snap plate B64. When the lower part of the snap plate B64 is pressed, the snap plate B64 rotates towards the vertical pipe B25 with the fixing pin B63 as the rotation connection point. The lower end of the vertical pipe B25 is inserted into the opening B611. The positioning post D624 engages with the positioning hole B612 on the fixing seat 61. Pressing the lower part of the snap-fit ​​plate B64 towards the vertical tube B25 causes the snap-fit ​​plate B64 to act on the positioning post C623, causing it to retract into the vertical tube B25. This causes the vertical plate C621 of the snap spring B62 to swing to a certain extent into the vertical tube B25 with the U-shaped bottom as the fixed point. The positioning post D624 then retracts from the positioning hole B612 into the fixed seat 61. At this point, the snap-fit ​​between the rear end of the handrail bracket 2 and the rear end of the side bracket 1 is released. The snap-fit ​​plate B64 is made of rigid plastic and has a certain strength. The lower side of the outer end of the positioning post D624 is set as a slope B625 to avoid interference between the positioning post D624 and the wall of the fixed seat 61 when it is inserted into or detached from the positioning hole B612.

[0030] When the engagement between the front end of the handrail bracket 2 and the front end of the side bracket 1 is released, but the engagement between the rear end of the handrail bracket 2 and the rear end of the side bracket 1 is not released, the handrail bracket 2 flips backward around the pivot pin 5. When the engagement between the front end of the handrail bracket 2 and the front end of the side bracket 1 is released, and the engagement between the rear end of the handrail bracket 2 and the rear end of the side bracket 1 is also released, the handrail bracket 2 can be lifted upward to separate it from the side bracket 1.

[0031] The connection structure between the rear wheel 7 and the side bracket 1 is shown in the attached figure. Figure 7 As shown, at least two sleeves 13 are provided on the side bracket 1 along the height direction. Bolts 8 are inserted through the sleeves 13 and connected to the rear wheel 7, and the bolts 8 are fixed to the sleeves 13. By selecting sleeves 13 of different heights for connection, the overall height of the frame body relative to the ground can be adjusted.

[0032] The connection structure between the front wheel 9 and the side bracket 1 is shown in the attached figure. Figure 1 As shown, the clamp arm support 91 of the front wheel 9 is fixedly installed to the side bracket 1 by welding or other means.

[0033] Example 2

[0034] As attached Figures 8-10 As shown, the difference from Embodiment 1 is that: quick release 82 is used to connect the sleeve 13 to the rear wheel 7, which is more convenient to operate when adjusting the connected sleeve 13 compared to using bolts 8 for fixing; the clamp arm support 91 of the front wheel 9 and the side bracket 1 are disassembled and installed with bolts.

Claims

1. A lightweight adjustable wheelchair, characterized by: The utility model provides a kind of folding bicycle, including the frame body with side support (1), armrest support (2), seat plate support (3), two the side support (1) is oppositely arranged, the seat plate support (3) is installed on two the side support (1) upper portion, the side support (1) has two upper and lower arrangement horizontal rods (11) and two front and rear arrangement vertical rods (12), the interval between two the horizontal rods (11) is 1 / 4~1 / 2 of rear wheel (7) diameter, and the rear wheel (7) is connected and fixed with the rear end of side support (1).

2. The lightweight adjustable wheelchair of claim 1, wherein: The armrest support (2) is respectively connected with the front and rear ends of the side support (1), the armrest support (2) is formed with clamping and rotating connection at the front and rear ends of the side support (1), after the front clamping is released, the armrest support (2) is flipped backward with the rotating connection point at the rear end as the center, and after the front and rear clamping is released, the armrest support (2) is separated from the side support (1).

3. The lightweight adjustable wheelchair of claim 2, wherein: The side support (1) is provided with a vertical positioning tube (4) at the front end, the positioning tube (4) is provided with an opening A (41) at the upper end, a clamping spring A (22) is placed in the vertical tube A (21) at the front end of the armrest support (2), the clamping spring A (22) is a U-shaped structure with the opening downward, one vertical plate A (221) of the clamping spring A (22) is provided with a positioning column A (223) and a positioning column B (224) arranged in a vertical manner on the outer side, the positioning column A (223) and the positioning column B (224) are arranged outside the wall of the vertical tube A (21), the other vertical plate B (222) is fixed with the wall of the vertical tube A (21) at the end, a clamping plate A (23) is arranged outside the vertical tube A (21), the upper part of the clamping plate A (23) is connected with the vertical tube A (21) through a fixed pin A (24) arranged transversely, the fixed pin A (24) is arranged transversely in the bottom of the U-shaped structure of the clamping spring A (22), the clamping plate A (23) can rotate towards the vertical tube A (21) with the fixed pin A (24) as the rotating connection point, the positioning column A (223) is arranged inside the clamping plate A (23), the lower end of the vertical tube A (21) is inserted into the opening A (41), and the positioning column B (224) is clamped with a positioning hole A (42) on the positioning tube (4).

4. The lightweight adjustable wheelchair of claim 2, wherein: The lower end of the vertical pipe B (25) of the rear end of the handrail support (2) is provided with a mounting seat (6) between the side support (1), the mounting seat (6) includes a fixed seat (61), a snap spring B (62), a fixed pin B (63), a clamping plate B (64), the lower end of the fixed seat (61) is rotatably connected with the rear end of the side support (1) by the shaft pin (5), the upper end of the fixed seat (61) is provided with an opening B (611), the snap spring B (62) is placed in the vertical pipe B (25) of the rear end of the handrail support (2), the snap spring B (62) is a U-shaped structure with the opening downward, one vertical plate C (621) of the snap spring B (62) is provided with a positioning column C (623) and a positioning column D (624) arranged in the up-down direction on the outer side, the positioning column C (623) and the positioning column D (624) are arranged outside the wall of the vertical pipe B (25), the other vertical plate D (622) is fixed with the wall of the vertical pipe B (25), the clamping plate B (64) is located outside the vertical pipe B (25), the upper part of the clamping plate B (64) is connected with the vertical pipe B (25) by the fixed pin B (63) transversely arranged, the fixed pin B (63) is transversely arranged in the bottom of the U-shaped structure of the snap spring B (62), the clamping plate B (64) can be rotated towards the vertical pipe B (25) by the fixed pin B (63) as the rotating connection point, the positioning column C (623) is towards the inner side of the clamping plate B (64), the lower end of the vertical pipe B (25) is inserted into the opening B (611), and the positioning column D (624) is clamped with the positioning hole B (612) on the fixed seat (61).

5. The lightweight adjustable wheelchair of claim 3, wherein: The clamping plate A (23) is a hard plastic part, and the outer end of the positioning column B (224) is provided with a slope A (225) on the lower side.

6. The lightweight adjustable wheelchair of claim 4, wherein: The clamping plate B (64) is a hard plastic part, and the outer end of the positioning column D (624) is provided with a slope B (625) on the lower side.

7. The lightweight adjustable wheelchair of claim 1, wherein: The side support (1) and the rear wheel (7) are connected by a bolt (81) or a quick release (82), and at least two sleeves (13) are arranged on the side support (1) in the height direction, and the bolt (81) or the quick release (82) is arranged in the sleeve (13) for fixation.

8. The lightweight adjustable wheelchair of claim 1, wherein: The side support (1) and the clamping arm support (91) of the front wheel (9) are fixedly installed, or are detachably installed by a bolt.

Images