A folding wheelchair

Abstract

The invention discloses a folding wheelchair, which comprises a front wheel fixing rod, a rear wheel fixing rod, a front cross beam, a rear cross beam, a seat bracket, a backrest bracket, a rear bracket, a buckle assembly and a push rod, wherein the top end of the rear wheel fixing rod is rotatably connected to the top end of the front wheel fixing rod, one end of the push rod is rotatably connected to the front cross beam, and the other end is rotatably connected to the bottom end of the backrest bracket and the top end of the rear bracket, the rear bracket is fixed to the rear cross beam, the buckle assembly comprises an elastic latch and a fixing plate with a through hole cooperating with the elastic latch, the elastic latch is fixed to the top end of the rear bracket, the fixing plate with a through hole is fixed to the bottom end of the backrest bracket, the rear end of the seat bracket is rotatably connected to the side of the backrest bracket, and the front end is fixedly connected to the top end of the front wheel fixing rod. Through such a structural design, the backrest bracket is pushed forward to drive the push rod to pull the folding of the entire frame, the folding operation is simple and convenient, and the volume of the overall frame after folding can be minimized, which greatly improves the practicality and portability of the wheelchair.

Description

Technical Field

[0001] The present invention relates to the technical field of rehabilitation equipment, and in particular to a folding wheelchair. Background Art

[0002] For people with limited mobility, wheelchairs are their main means of transportation for travel or activities. In order to save space, many wheelchairs in the prior art have been designed to be foldable. However, the existing folding structures have the problem of not being convenient to fold, or the overall volume after folding is not small enough. In addition, the user himself is not mobile and needs help from others to fold. Therefore, it is necessary to improve the folding structure of the existing folding wheelchair so that the user can complete the folding work by himself and the volume after folding is minimized. Summary of the invention

[0003] In view of the above technical problems, the present invention provides a foldable wheelchair, which can effectively solve the technical problems that the existing folding structure is inconvenient to fold and the volume cannot be minimized after folding.

[0004] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a foldable wheelchair, the foldable wheelchair comprises two front wheel fixing rods to which front wheels are fixed, two rear wheel fixing rods to which rear wheels are fixed, a front cross beam, a rear cross beam, a seat bracket, a backrest bracket, a rear bracket, a buckle assembly and a push rod, the front cross beam is connected to the two front wheel fixing rods, the rear cross beam is connected to the two rear wheel fixing rods, the top end of the rear wheel fixing rod is rotatably connected to the top end of the front wheel fixing rod, one end of the push rod is rotatably connected to the front cross beam, and the other end is rotatably connected to the bottom end of the backrest bracket and the top end of the rear bracket, the rear bracket is fixed to the rear cross beam, the buckle assembly comprises an elastic pin and a fixing plate with a through hole that cooperates with the elastic pin, the elastic pin is fixed to the top of the rear bracket, the fixing plate with a through hole is fixed to the bottom end of the backrest bracket, the rear end of the seat bracket is rotatably connected to the side of the backrest bracket, and the front end is fixedly connected to the top of the front wheel fixing rod.

[0005] Among them, two staggered and overlapping rotating connecting plates are hinged at the same hinge point at the other end of the push rod, wherein the other end of one of the rotating connecting plates is rotatably connected to the bottom end of the backrest bracket, and the other end of the other rotating connecting plate is rotatably connected to the top end of the rear bracket.

[0006] Wherein, the buckle assembly also includes a latch seat, the elastic latch is fixed in the latch seat, and the latch seat is fixed to the top of the rear bracket.

[0007] Among them, the elastic latch includes a telescopic spring, a latch and an operating lever, one end of the telescopic spring abuts against the inner wall of the latch seat, and the other end abuts against one end of the latch, one end of the operating lever is vertically fixedly connected to the latch, and the other end is exposed through a through hole on the latch seat, so that the latch can be driven to detach from the fixing plate by the operating lever.

[0008] Wherein, the front wheel fixing rod and the rear wheel fixing rod are arc-shaped fixing rods.

[0009] Wherein, a handrail rod is rotatably connected to the backrest bracket, and a handrail is arranged on the handrail rod.

[0010] Wherein, the top end of the backrest bracket extends backward to form a push-grip rod.

[0011] Wherein, a seat cushion is arranged on the seat bracket, and a backrest is arranged on the backrest bracket.

[0012] Wherein, the folding wheelchair also includes a foot pedal, and the foot pedal is rotatably connected to the outer side of the front cross beam through a connecting rod.

[0013] The beneficial effects of the present invention are as follows: Different from the prior art, the embodiment of the present invention provides a folding wheelchair, which comprises a front wheel fixing rod, a rear wheel fixing rod, a front cross beam, a rear cross beam, a seat bracket, a backrest bracket, a rear bracket, a buckle assembly and a push rod, wherein the top end of the rear wheel fixing rod is rotatably connected to the top end of the front wheel fixing rod, one end of the push rod is rotatably connected to the front cross beam, and the other end is rotatably connected to the bottom end of the backrest bracket and the top end of the rear bracket, the rear bracket is fixed to the rear cross beam, the buckle assembly comprises an elastic latch and a fixing plate with a through hole cooperating with the elastic latch, the elastic latch is fixed to the top end of the rear bracket, the fixing plate with a through hole is fixed to the bottom end of the backrest bracket, the rear end of the seat bracket is rotatably connected to the side of the backrest bracket, and the front end is fixedly connected to the top end of the front wheel fixing rod. Through such a structural design, the backrest bracket is pushed forward to drive the push rod to pull the entire frame to fold, the folding operation is simple and convenient, and the volume of the overall frame can be minimized after folding, which greatly improves the practicality and portability of the wheelchair. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of a foldable wheelchair provided by an embodiment of the present invention from a first viewing angle;

[0015] Figure 2 is a schematic diagram of the overall structure of the foldable wheelchair provided by an embodiment of the present invention from a second viewing angle;

[0016] Figure 3 is a schematic diagram of a folding wheelchair in a folding state provided by an embodiment of the present invention;

[0017] Figure 4is a schematic diagram of the structure of a folding wheelchair in a folded state provided by an embodiment of the present invention;

[0018] Figure 5 is a partially enlarged schematic diagram of a buckle assembly provided in an embodiment of the present invention;

[0019] Figure 6 is a schematic cross-sectional view of a buckle assembly provided by an embodiment of the present invention;

[0020] Figure 7 is a front view of a buckle assembly provided by an embodiment of the present invention;

[0021] Figure 8 It is a side view of a buckle assembly provided in an embodiment of the present invention.

[0022] Explanation of the numbers in the figure: 1. front wheel fixing rod; 2. rear wheel fixing rod; 3. front crossbeam; 4. rear crossbeam; 5. seat bracket; 6. backrest bracket; 7. rear bracket; 8. buckle assembly; 9. push rod; 81. elastic latch; 82. fixing plate with through hole; 83. latch seat; 811. telescopic spring; 812. latch; 813. operating lever; 831. notch; 832. slide groove; 833. threaded through hole; 834. concave arc surface; 10. rotating connecting plate; 11. armrest rod; 12. armrest; 13. push grip rod; 14. seat cushion; 15. foot pedal; 16. connecting rod; 17. front wheel; 18. rear wheel; 19. backrest. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of the present invention.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0025] Attached Figure 1-8 The following are schematic diagrams of the structure of the foldable wheelchair of the present invention and its various components. The technical solution of the present invention will be described in detail in conjunction with the accompanying drawings of the specification.

[0026] See also Figure 1-Figure 8As shown in the figure, an embodiment of the present invention provides a folding wheelchair, whose overall structure includes two front wheel fixing rods 1 fixed with front wheels 17, two rear wheel fixing rods 2 fixed with rear wheels 18, a front cross beam 3, a rear cross beam 4, a seat bracket 5, a backrest bracket 6, a rear bracket 7, a buckle assembly 8 and a push rod 9, the front cross beam 3 connects the two front wheel fixing rods 1, the rear cross beam 4 connects the two rear wheel fixing rods 2, the top of the rear wheel fixing rod 2 is rotatably connected to the top of the front wheel fixing rod 1, one end of the push rod 9 is rotatably connected to the front cross beam 2, and the other end is rotatably connected to the bottom end of the backrest bracket 6 and the top end of the rear bracket 7, the rear bracket 7 is fixed to the rear cross beam 4, the buckle assembly 8 includes an elastic pin 81 and a fixing sheet 82 with a through hole that cooperates with the elastic pin 81, the elastic pin 81 is fixed to the top of the rear bracket 7, the fixing sheet 82 with a through hole is fixed to the bottom end of the backrest bracket 6, the rear end of the seat bracket 5 is rotatably connected to the side of the backrest bracket 6, and the front end is fixedly connected to the top of the front wheel fixing rod 1.

[0027] The buckle assembly of the present invention cooperates with the fixing plate with a through hole through an elastic pin. When the folded wheelchair is displayed, the elastic pin is inserted into the through hole of the fixing plate, thereby realizing the connection and fixation of the backrest bracket and the rear bracket. The entire frame of the folded wheelchair is stably supported after it is unfolded. When the wheelchair needs to be folded, the elastic pin is moved to disengage the through hole of the fixing plate, thereby loosening the connection between the backrest bracket and the rear bracket, so that the backrest bracket can be folded forward, driving the push rod to stretch and then driving the entire frame to fold forward, which is simple and convenient to operate.

[0028] In one possible implementation, two overlapping rotating connecting pieces 10 are hinged at the same hinge point at the other end of the push rod 9, wherein the other end of one rotating connecting piece 10 is rotatably connected to the bottom end of the backrest bracket 6, and the other rotating connecting piece is rotatably connected to the top end of the rear bracket 7. The two rotating connecting pieces are connected so that the extension of the push rod can drive the rotating piece to rotate, so that the backrest bracket and the rear bracket can be folded forward like a buckle assembly. Furthermore, the connecting piece can be set in an arc shape, and the arc concave surface faces the extension direction of the rear end of the push rod, so as to facilitate the rotation and folding during the rotation process.

[0029] In one possible implementation, the buckle assembly 8 also includes a latch seat 83 , in which the elastic latch 81 is fixed, and a slot 831 is provided on the latch seat for the fixing plate to be embedded, and the latch seat 83 is fixed to the top of the rear bracket 7 .

[0030] Among them, in a possible implementation, the elastic latch 81 includes a telescopic spring 811, a latch 812 and an operating lever 813, one end of the telescopic spring 811 abuts against the inner wall of the latch seat 83, and the other end abuts against one end of the latch 812, one end of the operating lever 813 passes through the slide groove 832 on the latch seat 83 and is vertically fixedly connected to the latch 812 in the latch seat, the slide groove 832 is horizontally stretched toward the middle to form an elliptical shape, and the other end passes through the through hole on the latch seat 83 to be exposed, so that the latch 812 can be driven to disengage from the fixed plate 82 with the through hole by the operating lever 813.

[0031] Since the slide grooves are horizontally stretched toward the middle to form an ellipse, a certain distance is formed for the operating levers to slide relatively toward the middle, driving the latch pins to disengage from the through holes on the fixing plate, thereby releasing the lock.

[0032] like Figure 6 As shown, when the two operating levers are released as indicated by the arrow A, the internal telescopic spring pushes the latch through the through hole of the fixing plate to combine with the fixing plate, thereby realizing the combination of the backrest bracket and the rear bracket. When the operating lever is pressed inward as indicated by the arrow B, the latch is driven to disengage from the through hole of the fixing plate, thereby making the backrest bracket and the rear bracket disengage and fold.

[0033] The elastic force applied to the latch pin by the telescopic spring makes it inserted outward into the through hole of the fixing plate, and the latch pin can be driven to move in the opposite direction relative to the fixing plate by operating the lever so as to be disengaged from the through hole of the fixing plate, thereby allowing the backrest bracket to rotate relatively.

[0034] Furthermore, the upper and lower surfaces of the latch seat 83 are respectively formed as concave arc surfaces 833. The arrangement of such concave arc surfaces can facilitate the latch seat to be fixed on the circular tubular component, so that the latch seat and the contact surface of the component are more closely fitted, and the fixing stability is increased. The latch seat can also be rotated around the tubular component to achieve fixing at different angles.

[0035] Furthermore, a threaded through hole 834 is provided on the upper surface of the latch seat 83, and a screw is passed through the threaded through hole and then tightened to fix the latch seat on the component for use.

[0036] In a possible implementation, the front wheel fixing rod 1 and the rear wheel fixing rod 2 are arc-shaped fixing rods. The concave surface of the front wheel arc-shaped fixing rod faces the rear wheel, and the concave surface of the rear wheel arc-shaped fixing rod faces the front wheel. With the design of such arc-shaped fixing rods, the front wheel fixing rod and the rear wheel fixing rod can be more easily folded backwards when the wheelchair is folded.

[0037] In a possible implementation, a handrail rod 11 is rotatably connected to the backrest bracket 6 , and a handrail 12 is provided on the handrail rod 11 .

[0038] Among them, in a possible implementation, the top of the backrest bracket 6 extends backward to form a push handle 13. The push handle can facilitate the caregiver to push the wheelchair. When the wheelchair needs to be folded, after releasing the buckle assembly, the frame is driven forward to fold forward by pushing the push handle forward.

[0039] Wherein, the seat support 5 is provided with a seat cushion 14, and the backrest support 6 is provided with a backrest 19. In order to make the user sit more comfortably, the seat cushion and the backrest can be configured to be sponge elastic.

[0040] The folding wheelchair further includes a footrest 15, which is rotatably connected to the outer side of the front crossbeam 3 through a connecting rod 16. The provision of the footrest can facilitate the placement of the user's feet, and the footrest is connected in a rotatable manner, so that when the wheelchair is folded, the footrest can also be further folded with the rotation, thereby reducing the space volume after folding.

[0041] The folding wheelchair of the present invention is described in detail above in conjunction with the accompanying drawings of the present invention. It can be understood that the folding wheelchair includes a front wheel fixing rod, a rear wheel fixing rod, a front crossbeam, a rear crossbeam, a seat bracket, a backrest bracket, a rear bracket, a buckle assembly and a push rod, the top of the rear wheel fixing rod is rotatably connected to the top of the front wheel fixing rod, one end of the push rod is rotatably connected to the front crossbeam, and the other end is rotatably connected to the bottom end of the backrest bracket and the top end of the rear bracket, the rear bracket is fixed to the rear crossbeam, the buckle assembly includes an elastic latch and a fixing plate with a through hole that cooperates with the elastic latch, the elastic latch is fixed to the top of the rear bracket, the fixing plate with a through hole is fixed to the bottom end of the backrest bracket, the rear end of the seat bracket is rotatably connected to the side of the backrest bracket, and the front end is fixedly connected to the top of the front wheel fixing rod. Through such a structural design, the backrest bracket is pushed forward to drive the push rod to pull the entire frame to fold, the folding operation is simple and convenient, and the overall frame volume can be minimized after folding, which greatly improves the practicality and portability of the wheelchair.

[0042] Among them, the footrest and the armrest are both rotatably connected, and can be folded along with the rotation when the folding wheelchair is folded.

[0043] The buckle assembly of the present invention cooperates with the telescopic latch and the fixing plate with through holes to achieve fixed connection after the frame is unfolded and loosen when folded, which is convenient and simple to operate.

[0044] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A folding wheelchair, characterized in that: The folding wheelchair comprises two front wheel fixing rods to which the front wheels are fixed, two rear wheel fixing rods to which the rear wheels are fixed, a front crossbeam, a rear crossbeam, a seat bracket, a backrest bracket, a rear bracket, a buckle assembly and a push rod, wherein the front crossbeam connects the two front wheel fixing rods, the rear crossbeam connects the two rear wheel fixing rods, the top ends of the rear wheel fixing rods are rotatably connected to the top ends of the front wheel fixing rods, one end of the push rod is rotatably connected to the front crossbeam, and the other end of the push rod is hinged at the same hinge point with two staggered and overlapping rotating connecting pieces, wherein the other end of one of the rotating connecting pieces is rotatably connected to the bottom end of the backrest bracket, and the other end of the push rod is The other end of the rotatable connecting piece is rotatably connected to the top end of the rear bracket, and the connecting piece is arranged in an arc shape, and the arc-shaped concave surface extends toward the rear end of the push rod, and the other end is rotatably connected to the bottom end of the backrest bracket and the top end of the rear bracket, and the rear bracket is fixed to the rear cross beam, and the buckle assembly includes an elastic pin and a fixing piece with a through hole cooperating with the elastic pin, the elastic pin is fixed to the top of the rear bracket, and the fixing piece with a through hole is fixed to the bottom end of the backrest bracket, the rear end of the seat bracket is rotatably connected to the side of the backrest bracket, and the front end is fixedly connected to the top of the front wheel fixing rod.

2. The folding wheelchair according to claim 1, characterized in that: The buckle assembly also includes a latch seat, the elastic latch is fixed in the latch seat, a slot for the fixing plate to be embedded is provided on the latch seat, and the latch seat is fixed to the top of the rear bracket.

3. The folding wheelchair according to claim 2, characterized in that: The elastic latch includes a telescopic spring, a latch and an operating lever, one end of the telescopic spring abuts against the inner wall of the latch seat, and the other end abuts against one end of the latch, one end of the operating lever passes through a slide groove on the latch seat and is vertically fixedly connected to the latch in the latch seat, the slide grooves are horizontally stretched toward the middle to form an elliptical shape, and the other end passes through a through hole on the latch seat to be exposed, so that the latch can be driven to detach from the fixing plate by the operating lever.

4. The folding wheelchair according to claim 1, characterized in that: The front wheel fixing rod and the rear wheel fixing rod are arc-shaped fixing rods.

5. The folding wheelchair according to claim 1, characterized in that: The backrest bracket is rotatably connected with a handrail rod, and the handrail rod is provided with a handrail.

6. The folding wheelchair according to claim 5, characterized in that: The top end of the backrest bracket extends backward to form a push-grip rod.

7. The folding wheelchair according to claim 1, characterized in that: A seat cushion is arranged on the seat bracket, and a backrest is arranged on the backrest bracket.

8. The folding wheelchair according to claim 1, characterized in that: The folding wheelchair also includes a foot pedal, which is rotatably connected to the outer side of the front cross beam through a connecting rod.

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