FOLDING WHEELCHAIR

Abstract

A folding wheelchair, including a back frame a seat frame a lower frame, two rear wheel assemblies, two front wheel assemblies and an armrest; the armrest and the seat frame are hingedly connected to the back frame from top to bottom in a sequence; the two front wheel assemblies is connected to the lower frame; a sliding guide rail is provided between one end of the seat frame and each rear wheel assembly, and is provided with a sliding block thereon in a sliding fit manner; the sliding block is hingedly connected to a lower end of the back frame and the lower frame or the lower end of the back frame is hingedly connected to the sliding block and the lower frame; or the lower frame is hingedly connected to the lower end of the back frame and the sliding block The folding wheelchair is safe and reliable touse, and can be folded smoothly and quickly; in addition, the folded wheelchair has a small size, and is convenient to lean, against a wall, occupies a small space in a vehicle trunk or under a bed, and is convenient to use when going out.

Claims

1. A folding wheelchair, comprising a back frame (1), a seat frame(2), a lower frame (3), two rear wheel assemblies (4), two front wheel assemblies (5) and armrests (9), wherein the armrests (9) and the seat frame (2) are hinged to the back frame (1) from top to bottom in sequence, and the two front wheel assemblies (5) are assembled and connected with the lower frame (3); characterized in that: 1) a sliding guide rail (8) is arranged between one end of the seat frame (2) and each rear wheel assembly (4), and a sliding block (7) is arranged on each sliding guide rail (8) in a sliding fit manner; and 2) the sliding blocks (7) are hinged with the lower end of the back frame (1) and are also hinged, assembled and connected with the lower frame (3), or the lower end of the back frame (1) is hinged with the sliding blocks (7) and is also hinged, assembled and connected with the lower frame (3), or the lower frame (3) is hinged with the lower end of the back frame (1) and is also hinged, assembled and connected with the sliding blocks (7).

2. The folding wheelchair according to claim 1, characterized in that: the folding wheelchair further comprises a latch frame (6) and latches (10), each sliding block (7) comprises a lock cylinder (7-1) extending outwards from the side surface of the sliding block, the latch frame (6) is fixedly connected with the lock cylinders (7-1), the latch frame (6) is a C-shaped tube, the latches (10) are assembled and connected in the tube in a sliding fit manner, and each lock cylinder (7-1) is provided with a stepped latch hole (7-2); each latch (10) comprises a pull handle (10-1), a pull rod (10-2), a spring (10-3), a bolt (10-4) and a jackscrew (10-5), wherein the pull handle (10-1) is fixedly connected to the pull rod (10-2), the pull rod (10-2) is assembled and connected in the tube of the latch frame (6) in a sliding fit manner, the handle (10-1) extends out of an opening of the C-shaped tube latch frame (6), one end of the pull rod (10-2), which is close to the sliding block (7), is provided with the bolt (10-4), and the bolt (10-4) penetrates through the latch hole (7-2) and is fixedly connected with the pull rod (10-2) through the jackscrew (10-5); and the spring sleeved on the bolt (10-4), one end of the spring (10-3) is abutted against step surface of the stepped latch hole (7-2), and the other end of the spring (10-3) is abutted against a step surface arranged on the bolt (10-4).

3. The, folding wheelchair according to claim 1, characterized in that: each rear wheel assembly (4) comprises a rear wheel bracket (4-1) and a rear wheel (4-2), and the sliding guide rail (8) is arranged between one end of the seat frame (2) and the rear wheel bracket (4-1) of each rear wheel assembly (4); and each front wheel assembly (5) comprises a front wheel bracket (5-1) and a front wheel (5-2), and the front wheel bracket (5-1) of each front wheel assembly (5) is hinged, assembled and connected with the lower frame (3) and the seat frame (2) respectively.

4. The folding wheelchair according to claim 1, characterized in that: the rear wheel bracket (4-1) of one rear wheel assembly (4) is assembled and connected with an electrically driven transmission part (12), and the electrically driven transmission part (12) is linked with one rear wheel (4-2) in a transmission manner and is electrically connected with an electric controller (9-2) arranged on one armrest (9).

5. The folding wheelchair according to claim 1, characterized in that: the lower frame (3) is also assembled and connected with foot rests (11).

6. The folding wheelchair according to claim 1, characterized in that: an armrest support rod (9-1) is also hinged between each armrest (9) and the at frame (2).

7. The folding wheelchair according to claim 2, characterized in that: each sliding block (7) is also provided with a fixing plate (7-3), the outer wall of the latch frame (6) is provided with a latch frame mounting plate (6-1), and the latch frame mounting plate (6-1) is fixedly connected with the fixing plates (7-3) of the sliding blocks (7).

Description

DESCRIPTION OF THE DRAWINGS

[0014] FIG. 1 is a structural schematic diagram of a folding wheelchair of the utility model;

[0015] FIG. 2 is a structural schematic diagram of a side face of a folding wheelchair of the utility model;

[0016] FIG. 3 is a structural schematic diagram of a folding process in FIG. 1;

[0017] FIG. 4 is a structural schematic diagram of a locking part in FIG. 1;

[0018] FIG. 5 is an amplified section view of a part I in FIG. 4;

[0019] FIG. 6 is an A-direction view of FIG. 4; and

[0020] FIG. 7 is a structural schematic diagram of a folded state of a folding wheelchair of the utility model.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

[0021] The utility model is further described in detail below in combination with an embodiment shown in drawings.

[0022] As shown in FIG. 1-FIG. 7, a folding wheelchair comprises a back frame 1, a seat frame 2, a lower frame 3, two rear wheel assemblies 4, two front wheel assemblies 5 and armrests 9, wherein the armrests 9, the seat frame 2 and the lower frame 3 are hinged to the back frame 1 from top to bottom in sequence, and the two front wheel assemblies 5 are assembled and connected with the lower frame 3; a sliding guide rail 8 is arranged between one end of the seat frame 2 and each rear wheel assembly 4, and a sliding block 7 is arranged on each sliding guide rail 8 in a sliding fit manner; and the sliding blocks 7 are hinged with the lower end of the back frame 1 and are also hinged, assembled and connected with the lower frame 3. Of course, the following structure may also be adopted: the lower end of the back frame 1 is hinged with the sliding blocks 7 arid is also hinged, assembled and connected with the lower frame 3: or another connection manner is adopted: the lower frame 3 is hinged with the lower end of the back frame 1 and is also hinged, assembled and connected with the sliding blocks 7.

[0023] The folding wheelchair further comprises a latch frame 6 and latches 10, each sliding block 7 comprises a lock cylinder 7-1 extending outwards from the side surface of the sliding block, the latch frame 6 is fixedly connected with the lock cylinders 7-1 the latch frame 6 is a C-shaped tube, the latches 10 are assembled and connected in the tube in a sliding fit manner, and each lock cylinder 7-1 is provided with a stepped latch hole 7-2: each latch 10 comprises a pull handle 10-1, a pull rod 10-2, a spring 10-3, a bolt 10-4 and a jackscrew 10-6, wherein, the handle 10-1 is fixedly connected to the, pull rod 10-2, the pull rod 10-2 is assembled and connected in the tube of the latch frame 6 in a sliding fit manner, the pull handle 10-1 extends out of an opening of the C-shaped tube latch frame 6, one end of the pull rod 10-2, which is close to the sliding block 7, is provided with the bolt 10-4, and the bolt 10-4 penetrates through the latch hole 7-2 and is fixedly connected with the pull rod 10-2 through the jackscrew 10-5; and the spring 10-3 is sleeved on the bolt 10-4, one end of the spring 10-3 is abutted against a step surface of the stepped latch hole 7-2, and the other end of the spring 10-3 is abutted against a step surface arranged on the bolt 10-4.

[0024] For convenient installation, each rear wheel >assembly 4 comprises a rear wheel bracket 4-1 and a rear wheel 4-2, and the sliding guide rail 8 is arranged between one end of the seat frame 2 and the rear wheel bracket 4-1 of each rear wheel assembly 4; and each front wheel assembly 5 comprises a front wheel bracket 5-1 and a front wheel 5-2, and the front wheel bracket 5-1 of each front wheel assembly 5 is hinged, assembled and connected with the lower frame 3 and the seat frame 2 respectively.

[0025] For rapid use and easy and labor-saving operation, the rear wheel bracket 4-1 of one rear wheel assembly 4 is assembled and connected with an electrically driven transmission part 12,, and the electrically driven transmission part 12 is linked with one rear wheel 4-2 in a transmission manner and is electrically connected with an electric controller 9-2 arranged on one armrest 9.

[0026] For safe and comfortable use, the lower frame 3 is also assembled and connected with foot rests 11; and an armrest support rod 9-1 is also hinged between each armrest 9 and the seat frame 2.

[0027] In order to avoid vibration.sub.>of the latch frame 6 and reduce noise when the folding wheelchair is used, each sliding block 7 is also provided with a fixing plate 7-3, the outer wall of the latch frame 6 is provided with a latch frame mounting plate 6-1, and the latch frame mounting plate 6-1 is fixedly connected with the fixing plates 7-3 of the sliding blocks 7.

[0028] A using, state of a folding wheelchair of the utility model before being folded is shown in FIG. 1, FIG. 2, FIG. 3 and FIG. 7. FIG. 3 is a state diagram in a folding process of the utility model. FIG. 7 is a completely folded state diagram after the folding wheelchair is folded. As shown in FIG. 1 and FIG. 2, when the folding wheelchair of the utility model is in a completely unfolded state, then the locations of the sliding blocks 7 just enable the latch holes 7-2 of the sliding blocks 7 to be in axial alignment with positioning holes 8-1 arranged on the sliding guide rails 8, and the bolts 10-4 are inserted into the positioning holes 8-1 arranged in the sliding guide rails 8 under the effect of the springs 10-3. In this way, the wheelchair can be safely used. A user sits on the seat frame 2, and the folding wheelchair can move forwards or backwards freely as long as the user rotates the rear wheels. Since the folding wheelchair is provided with the electrically driven transmission part 12, the wheelchair can move more easily and more smoothly as long as the user operates the electric controller 9-2 arranged on one armrest 9. When the wheelchair needs to be folded, as long as the pull handles 10-1 of the latches are pulled, the bolts 10-4 are disengaged from the positioning holes 8-1 of the gliding guide rails 8, and the pull handles 10-1 are pulled backwards continuously to drive the latch frame to move backwards, so that the sliding blocks move backwards along the sliding guide rails, and then the back frame 1 the seat frame 2 and the lower frame 3 can close up together conveniently. Therefore, synchronous one-time folding in place is realized, the folding is smooth and quick, and the folded wheelchair has a small volume, is convenient to lean against a wall, occupies a small space in a vehicle trunk or under a bed and is also convenient to use when going out.