Adjustable wheelchair

Abstract

The invention provides an adjustable wheelchair which comprises a frame, front wheels, rear wheels, pedals and a backrest, the frame comprises a main frame and a back frame, the front wheels and the pedals are connected to the front end of the main frame in a liftable mode, the back frame is rotatably connected to the rear end of the main frame, and the backrest is connected to the back frame in a liftable mode; lifting columns capable of moving transversely are arranged on the two sides of the main frame respectively, the lifting columns are provided with wheel shafts capable of ascending and descending, and the rear wheels are connected to the two ends of the wheel shafts respectively. A carbon fiber seat plate is installed on the main frame and provided with battens which are arranged in a left-right crossed mode, a connecting groove is formed in one end of each batten, a connecting belt penetrates into each connecting groove, and the battens are connected through the connecting belts. The gravity center of the wheelchair is adjusted by arranging the rear wheel axle capable of transversely moving and the liftable front wheels, the sitting posture angle is adjusted by arranging the rotatable back frame, and the seat plate retains the supporting performance of carbon fibers and has rebound resilience, so that the comfort of a wheelchair user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wheelchairs, and in particular to an adjustable wheelchair. Background Art

[0002] Wheelchairs are an important form of assistive mobility, specifically chairs with wheels that replace walking, providing independence and freedom of movement for people with limited mobility. These include the injured, sick, and disabled, who need home rehabilitation, transportation, medical appointments, and outdoor activities. Currently, wheelchairs in use are typically fixed, with no adjustment to the center of gravity or sitting angle. Furthermore, the seat lacks elasticity, leading to discomfort for wheelchair users. Summary of the Invention

[0003] In order to solve the problems existing in the prior art, the present invention provides an adjustable wheelchair, which can adjust the center of gravity and sitting angle of the wheelchair. The seat plate retains the support of carbon fiber and has resilience, thereby improving the comfort of the wheelchair user.

[0004] The present invention provides an adjustable wheelchair, comprising a frame, front wheels, rear wheels, pedals and a backrest, the frame comprising a main frame and a back frame, the front wheels and the pedals being respectively liftably connected to the front end of the main frame, the back frame being rotatably connected to the rear end of the main frame, and the backrest being liftably connected to the back frame; lifting columns being respectively provided on both sides of the main frame and being movable laterally, the lifting columns being provided with liftable wheel axles, and the rear wheels being respectively connected to both ends of the wheel axles; a carbon fiber seat plate being mounted on the main frame, the carbon fiber seat plate being provided with slats arranged in a left-right cross pattern, one end of the slat being provided with a connecting groove, a connecting belt being inserted into the connecting groove, and the slats being connected by the connecting belt.

[0005] Preferably, in the adjustable wheelchair provided by the present invention, the main frame includes a first fixed beam and two mutually symmetrical first brackets, and both ends of the first fixed beam are respectively connected to the first brackets.

[0006] Preferably, in the adjustable wheelchair provided by the present invention, the first bracket is in an L-shaped structure.

[0007] Preferably, in the adjustable wheelchair provided by the present invention, the front wheel is provided with a first clamping member adapted to the first bracket.

[0008] Preferably, in the adjustable wheelchair provided by the present invention, the interior of the first bracket is hollow, a second clamping member is provided at the front end of the first bracket, and telescopic tubes are respectively connected to both sides of the footrest, and the telescopic tubes are inserted into the interior of the first bracket.

[0009] Preferably, in the adjustable wheelchair provided by the present invention, one end of the lifting column is connected to a third clamping member adapted to the first bracket.

[0010] Preferably, in the adjustable wheelchair provided by the present invention, the wheel axle is provided with a fourth clamping member adapted to the lifting column.

[0011] Preferably, the present invention provides an adjustable wheelchair, wherein the back frame includes a second fixed beam and two second brackets symmetrical to each other, and the two ends of the second fixed beam are respectively connected to the second brackets; one end of the second bracket is provided with a connecting block and a fifth clamping member adapted to the first bracket, and one side of the fifth clamping member is provided with a fixing plate; one end of the connecting block is rotatably connected to one end of the fixing plate; the other end of the fixing plate is provided with a movable slot, the other end of the connecting block is connected to a clamping column adapted to the movable slot, and the fixing plate is provided with a clamping block adapted to the clamping column.

[0012] Preferably, in the adjustable wheelchair provided by the present invention, a hollow groove is provided in the connecting block, a connecting piece is provided in the hollow groove, one end of the connecting piece is connected to the connecting block, and the other end of the connecting piece is connected to the grip.

[0013] Preferably, in the adjustable wheelchair provided by the present invention, the first bracket is provided with a wheel guard plate.

[0014] It can be seen that the adjustable wheelchair provided by the present invention is provided with a laterally movable rear wheel axle and a liftable front wheel to adjust the center of gravity of the wheelchair, and a rotatable back frame to adjust the sitting angle. The seat plate retains the support of carbon fiber and has resilience, thereby improving the comfort of the wheelchair user. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 Shown is a schematic structural diagram of an adjustable wheelchair according to an embodiment of the present invention; Figure 2 Shown is a front view of an adjustable wheelchair according to an embodiment of the present invention; Figure 3 Shown is a rear view of an adjustable wheelchair according to an embodiment of the present invention; Figure 4 Display as Figure 3 Zoomed diagram of local A; Figure 5 Shown is a top view of an adjustable wheelchair according to an embodiment of the present invention; Figure 6 Shown is a bottom view of an adjustable wheelchair according to an embodiment of the present invention; Figure 7 Shown is a side view of an adjustable wheelchair according to an embodiment of the present invention.

[0017] The reference numerals in the accompanying drawings are as follows: Front wheel 1, first clamping member 11, rear wheel 2, wheel axle 21, fourth clamping member 211, pedal 3, backrest, main frame 5, lifting column 51, third clamping member 511, first fixed beam 52, first bracket 53, second clamping member 531, wheel guard plate 532, back frame 6, second fixed beam 61, second bracket 62, connecting block 621, clamping column 6211, clamping block 6212, hollow groove 6213, connecting member 6214, grip bar 6215, fifth clamping member 622, fixing plate 623, carbon fiber seat plate 7, slats 71, connecting groove 72, connecting belt 73. DETAILED DESCRIPTION

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0019] 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 entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. In this document, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0020] In the prior art, wheelchairs are usually fixed and cannot adjust the center of gravity and sitting angle of the wheelchair. In addition, the seat plate lacks elasticity, which leads to a lack of comfort for the wheelchair user. The embodiment of the present invention provides the following solutions: like Figure 1-7As shown, an embodiment of the present invention provides an adjustable wheelchair, comprising a frame, front wheels 1, rear wheels 2, footrests 3, and a backrest 4. The frame comprises a main frame 5 and a backrest 6. The front wheel 1 and footrest 3 are respectively connected to the front end of the main frame 5 in a manner that allows them to be raised and lowered. The backrest 4 is connected to the backrest 6 in a manner that allows them to be raised and lowered. Laterally movable lifting columns 51 are provided on either side of the main frame 5. The lifting columns 51 are provided with liftable wheel axles 21. The rear wheels 2 are connected to both ends of the wheel axles 21. A carbon fiber seat plate 7 is mounted on the main frame 5. The carbon fiber seat plate 7 is provided with slats 71 arranged in a cross pattern. One end of the slats 71 is provided with a connecting groove 72. A connecting belt 73 is inserted into the connecting groove 72. The slats 71 are connected by the connecting belt 73.

[0021] It should be noted that the wheelchair is made entirely of titanium alloy. The footrests 3 are adjusted up and down to the length of the user's calves, the front wheels are adjusted up and down to the front seat height, the rear wheels 2 are adjusted laterally to a suitable center of gravity according to the user's body shape, the wheel axles 21 are adjusted up and down to a suitable height according to the user's height, and the backrest 4 is adjusted to a suitable height according to the user's height. The slats 71 are formed by cutting curved grooves in the carbon fiber seat plate 7, dividing the carbon fiber seat plate 7 into two intersecting left and right areas. The intersecting areas are then connected to each other with connecting straps 73 passing through connecting grooves 72. The connecting straps 73 can be made of elastic Oxford cloth, which has obvious advantages over the rectangular cuts in the middle of common seat plates on the market, retaining the support of carbon fiber while also having resilience.

[0022] In some embodiments, the main frame 5 includes a first fixed beam 52 and two mutually symmetrical first brackets 53 . Both ends of the first fixed beam 52 are respectively connected to the first brackets 53 . The first brackets 53 are L-shaped.

[0023] In some embodiments, the front wheel 1 is provided with a first clamping member 11 adapted to the first bracket 53 , and the first clamping member 11 is clamped and fixed by tightening the left and right parts with bolts.

[0024] In some embodiments, the interior of the first bracket 53 is hollow, a second clamping member 531 is provided at the front end of the first bracket 53 , and telescopic tubes 31 are respectively connected to both sides of the pedal 3 , and the telescopic tubes 31 are inserted into the interior of the first bracket 53 .

[0025] It should be noted that the second clamping member 531 is clamped and fixed by tightening the left and right parts with bolts. When the telescopic tube 31 is inserted into a suitable position inside the first bracket 53 , it is fixed by the second clamping member 531 .

[0026] In some embodiments, one end of the lifting column 51 is connected to a third clamping member 511 adapted to the first bracket 53 , and the third clamping member 511 is clamped and fixed by tightening the left and right parts with bolts.

[0027] In some embodiments, the wheel axle 21 is provided with a fourth clamping member 211 adapted to the lifting column 51 , and the fourth clamping member 211 is clamped and fixed by tightening two left and right parts by bolts.

[0028] In some embodiments, the back frame 6 includes a second fixed beam 61 and two symmetrical second brackets 62, with both ends of the second fixed beam 61 connected to the second brackets 62. One end of the second bracket 62 is provided with a connecting block 621 and a fifth clamping member 622 that is compatible with the first bracket 53. One side of the fifth clamping member 622 is provided with a fixing plate 623. One end of the connecting block 621 is rotatably connected to one end of the fixing plate 623. The other end of the fixing plate 623 is provided with a movable slot, and the other end of the connecting block 621 is connected to a clamping column 6211 that is compatible with the movable slot. The fixing plate 623 is provided with a clamping block 6212 that is compatible with the clamping column 6211.

[0029] It should be noted that the fifth clamping member 622 is clamped and fixed by tightening the left and right parts with bolts. The fifth clamping member 622 is clamped and fixed to the rear end of the first bracket 53. The back frame 6 is adjusted in angle by rotating one end of the connecting block 621. During rotation, the clamping column 6211 moves in the movable groove. After adjusting to the appropriate position, it is locked on the clamping column 6211 through the clamping block 6212.

[0030] In some embodiments, a hollow groove 6213 is provided in the connection block 621 , a connection piece 6214 is provided in the hollow groove 6213 , one end of the connection piece 6214 is connected to the connection block 621 , and the other end of the connection piece is connected to a handle 6215 .

[0031] It should be noted that when adjusting the angle of the back frame 6, the adjustment can be done by holding the handle 6215 with the hand, which is more convenient and labor-saving.

[0032] In some embodiments, the first bracket 53 is provided with a wheel guard plate 532, which can protect the wheel and also serve as a handrail, thereby simplifying the overall structure.

[0033] In some embodiments, the first fixed beam 52, the second fixed beam 61 and the wheel axle 21 can be customized to fit the width of the user's body shape, so that the width of the main frame 5 can adapt to the user's body shape.

[0034] In summary, an embodiment of the present invention provides an adjustable wheelchair, which is provided with a laterally movable rear wheel axle and a liftable front wheel to adjust the center of gravity of the wheelchair, and a rotatable back frame to adjust the sitting angle. The seat plate retains the support of carbon fiber and has resilience, thereby improving the comfort of the wheelchair user.

[0035] The above content is only a specific embodiment of the present application, and the protection scope of the present application is not limited thereto. Those skilled in the art may make changes or substitutions within the technical scope disclosed in the present application, and these changes or substitutions should all be within the protection scope of the present application.

[0036] Those skilled in the art will appreciate that although some embodiments described herein include some features and not others included in other embodiments, the combination of features from different embodiments is intended to be within the scope of the invention and to form different embodiments.

[0037] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. An adjustable wheelchair comprising a frame, front wheels (1), rear wheels (2), footrests (3) and a backrest (4), characterized in that: The bicycle frame comprises a main frame (5) and a back frame (6), the front wheel (1) and the pedal (3) are respectively connected to the front end of the main frame (5) in a liftable manner, the back frame (6) is rotatably connected to the rear end of the main frame (5), and the backrest (4) is connected to the back frame (6) in a liftable manner; both sides of the main frame (5) are respectively provided with lifting columns (51) that can move laterally, the lifting columns (51) are provided with a liftable wheel axle (21), and the rear wheel (2) is respectively connected to the two ends of the wheel axle (21); a carbon fiber seat plate (7) is installed on the main frame (5), the carbon fiber seat plate (7) is provided with slats (71) arranged in a left-right cross pattern, one end of the slats (71) is provided with a connecting groove (72), a connecting belt (73) is inserted into the connecting groove (72), and the slats (71) are connected through the connecting belt (73).

2. The adjustable wheelchair according to claim 1, characterized in that: The main frame (5) comprises a first fixed beam (52) and two mutually symmetrical first brackets (53), and both ends of the first fixed beam (52) are respectively connected to the first brackets (53).

3. The adjustable wheelchair according to claim 2, characterized in that: The first bracket (53) is an L-shaped structure.

4. The adjustable wheelchair according to claim 2, characterized in that: The front wheel (1) is provided with a first clamping member (11) adapted to the first bracket (53).

5. The adjustable wheelchair according to claim 2, characterized in that: The interior of the first bracket (53) is hollow, and a second clamping member (531) is provided at the front end of the first bracket (53). Both sides of the pedal (3) are respectively connected to telescopic tubes (31), and the telescopic tubes (31) are inserted into the interior of the first bracket (53).

6. The adjustable wheelchair according to claim 2, characterized in that: One end of the lifting column (51) is connected to a third clamping member (511) adapted to the first bracket (53).

7. The adjustable wheelchair according to claim 2, characterized in that: The wheel axle (21) is provided with a fourth clamping member (211) adapted to the lifting column (51).

8. The adjustable wheelchair according to claim 2, characterized in that: The back frame (6) includes a second fixed beam (61) and two second brackets (62) that are symmetrical to each other, and the two ends of the second fixed beam (61) are respectively connected to the second brackets (62); one end of the second bracket (62) is provided with a connecting block (621) and a fifth clamping member (622) that is compatible with the first bracket (53), and one side of the fifth clamping member (622) is provided with a fixing plate (623); one end of the connecting block (621) is rotatably connected to one end of the fixing plate (623); the other end of the fixing plate (623) is provided with a movable card slot, the other end of the connecting block (621) is connected to a card column (6211) that is compatible with the movable card slot, and the fixing plate (623) is provided with a card block (6212) that is compatible with the card column (6211).

9. The adjustable wheelchair according to claim 8, characterized in that: A hollow groove (6213) is provided in the connecting block (621), a connecting piece (6214) is provided in the hollow groove (6213), one end of the connecting piece (6214) is connected to the connecting block (621), and the other end of the connecting piece is connected to a grip rod (6215).

10. The adjustable wheelchair according to claim 2, characterized in that: The first bracket (53) is provided with a wheel guard plate (532).

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