Seat hinge folding device of wheelchair

Abstract

The utility model discloses a seat hinge folding device of a wheelchair, which comprises a left hinge connecting device, a right hinge connecting device, a left rear rod, a left front rod, a right rear rod, a right front rod and a soft seat cushion, the left hinge connecting device is connected between the left rear rod and the left front rod, and the left front rod can be overturned and folded towards the left rear rod through the left hinge connecting device; a right hinge connecting device is connected between the right rear rod and the right front rod, and the right front rod can be overturned and folded towards the right rear rod through the right hinge connecting device; a soft seat cushion is fixedly connected between the left rear rod and the right rear rod; the left front rod can be overturned and folded towards the left rear rod through the left hinge connecting device so as to shorten the length of the left side; the right front rod can be overturned and folded towards the right rear rod through the right hinge connecting device so as to shorten the right length; after the rod bodies on the left side and the right side are folded, the length of the seat is shortened, the packaging size is compressed, packaging is more compact and tight, the hollow space of internal packaging is reduced, and seat parts are not prone to being crushed due to the hollow space.

Description

Technical Field

[0001] The utility model relates to a seat device of a foldable wheelchair, in particular to a seat hinged folding device of the wheelchair. Background Art

[0002] For example 1: Chinese patent document publication number: CN118044954A, discloses a wheelchair with a detachable walking aid, which relates to the field of wheelchair technology, including a wheelchair, a side connecting frame is provided on the side of the wheelchair, a folding storage connecting frame is provided at the bottom of the wheelchair, a pushing armrest is fixedly connected to the top of one side of the side connecting frame, a patient armrest is fixedly connected to the side of the side connecting frame close to the pushing armrest, and a seat cushion is fixedly connected to one side of the side connecting frame. By providing a wheelchair and a folding storage connecting frame, it is convenient for the patient to sit directly on the seat cushion for pushing and using, and at the same time, the folding storage connecting frame facilitates the folding and storage of the wheelchair, saving storage space.

[0003] For example 2: Chinese patent document announcement number: CN220938335U, discloses a seat articulated frame of a wheelchair, the X-shaped cross-articulated frame of this product includes a left tilting rod, a right tilting rod, and an articulated axis; the left and right side edges of the seat cushion are respectively fixedly connected to the corresponding left-side connecting rod and right-side connecting rod of the cushion; the left tilting rod includes a left tilting lower section rod and a left tilting upper section rod, the top of the left tilting upper section rod is fixedly connected to the rear section of the right-side connecting rod of the cushion, and the left tilting lower section rod and the left tilting upper section rod are detachably connected; the right tilting rod includes a right tilting lower section rod and a right tilting upper section rod, the top of the right tilting upper section rod is fixedly connected to the rear section of the left-side connecting rod of the cushion, and the right tilting lower section rod and the right tilting upper section rod are detachably connected; an articulated axis is crossed between the upper section of the left tilting lower section rod and the upper section of the right tilting lower section rod; this product is convenient for use with a detachable and assembled left and right articulated folding wheelchair, and the packaging volume is compressed after disassembly.

[0004] Example 3: Chinese patent document publication number: CN116392329A, a wheelchair with linked adjustable backrest and footrest, the backrest frame of this product is connected to a backrest cushion; the floor-standing caster device is connected to the lower part of the seat frame; the top of the seat frame is connected to a seat cushion.

[0005] The above-mentioned products belong to the same structural type. For example, the seats and seat cushions of the wheelchairs disclosed in 1, 2, and 3 can only be folded left and right along with the left and right side frames of the wheelchair, but the seats and seat cushions cannot be flipped and folded forward and backward, and the front and rear length and space volume of the seats and seat cushions cannot be compressed. The length and volume of the seat are still relatively large, and it is difficult to make a foldable wheelchair with a smaller volume. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a seat articulation folding device for a wheelchair with reasonable structural design and capable of articulating and folding the seat to shorten the seat length and compress and pack the seat.

[0007] The solutions to the above technical problems are:

[0008] A seat articulated folding device for a wheelchair comprises a left articulated connection device, a right articulated connection device, and also comprises a left rear rod, a left front rod, a right rear rod, a right front rod, and a soft seat cushion, wherein a left articulated connection device is connected between the left rear rod and the left front rod, and the left front rod can be flipped and folded toward the left rear rod through the left articulated connection device; a right articulated connection device is connected between the right rear rod and the right front rod, and the right front rod can be flipped and folded toward the right rear rod through the right articulated connection device; and a soft seat cushion is fixedly connected between the left rear rod and the right rear rod.

[0009] The beneficial effects of the seat hinged folding device of the wheelchair of the utility model are as follows: when the product is packed at the factory and not in use by the user and is carried out, the left front rod can be flipped and folded toward the left rear rod through the left hinged connection device to shorten the length of the left side; the right front rod can be flipped and folded toward the right rear rod through the right hinged connection device to shorten the length of the right side; after the left and right rod bodies are folded, the length of the seat is shortened, the packaging volume is compressed, the packaging is more compact and strict, the hollow space of the internal packaging is reduced, and the seat parts are not easily crushed due to the hollow space; when in use, the left front rod and the right front rod are flipped and opened, so that the left rear rod and the left front rod are arranged in the same axial direction, and the right rear rod and the right front rod are arranged in the same axial direction to achieve the original required length; the overall use is convenient, folding is convenient, and flipping and unfolding are convenient for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 A three-dimensional diagram of the product of the utility model in an unfolded state;

[0011] Figure 2 A three-dimensional diagram of the folded state of the utility model product;

[0012] Figure 3 This is a disassembly state diagram of the product of the utility model;

[0013] Figure 4 This is a disassembled state diagram of the left rear rod, the left hinged connection device, the left front rod, the right rear rod, the right hinged connection device, and the right front rod of the utility model product;

[0014] Figure 5 The utility model product includes a three-dimensional diagram of an X-shaped hinged frame in an unfolded state;

[0015] Figure 6 , Figure 7 , Figure 8 The utility model product includes a disassembled diagram of an X-shaped hinged frame in an unfolded state;

[0016] Fig. 9 , Fig.10 The utility model product includes a three-dimensional diagram of a folded state of an X-shaped hinged frame;

[0017] Fig.11 , Fig.12 A three-dimensional diagram of the utility model product in an unfolded state when applied to a wheelchair;

[0018] Fig.13 This is a three-dimensional diagram of the utility model product in a folded state when applied to a wheelchair.

[0019] Left rear rod 1A, left hinged connecting device 1B, left front rod 1C, left rear joint 1B1, left screw 1B2, left front joint 1B3, right rear rod 2A, right hinged connecting device 2B, right front rod 2C, right rear joint 2B1, right screw 2B2, right front joint 2B3, soft seat cushion 3, X-shaped hinge frame 4, central hinge axis 41, left tilt rod 42, right tilt rod 43. DETAILED DESCRIPTION

[0020] like Figures 1 to 13 As shown: a seat articulated folding device of a wheelchair, which belongs to the wheelchair component, includes a left articulated connecting device 1B and a right articulated connecting device 2B; the left articulated connecting device 1B and the right articulated connecting device 2B are made of metal, such as aluminum; the seat articulated folding device also includes a left rear rod 1A, a left front rod 1C, a right rear rod 2A, a right front rod 2C, and a soft seat cushion 3; the soft seat cushion 3 is made of leather or cloth; the left rear rod 1A, the left front rod 1C, the right rear rod 2A, and the right front rod 2C are made of metal pipes, such as aluminum, which are relatively light and do not rust.

[0021] The left rear rod 1A and the left front rod 1C are arranged in the same axial direction, and the total length of the left rear rod 1A and the left front rod 1C is 30 cm to 50 cm. The length of the left rear rod 1A is longer than the length of the left front rod 1C, and the left front rod 1C accounts for 25% to 40% of the total length. The left rear rod 1A and the left front rod 1C are set to respective suitable lengths; the diameters of the left rear rod 1A and the left front rod 1C are 1.5 cm to 4 cm; the right rear rod 2A and the right front rod 2C are arranged in the same axial direction, and the total length of the right rear rod 2A and the right front rod 2C is 30 cm to 50 cm. The length of the right rear rod 2A The length of the left rear rod 1A and the left front rod 1C is longer than that of the right front rod 2C, and the right front rod 2C accounts for 25% to 40% of the total length. The left rear rod 1A and the left front rod 1C are respectively set to suitable lengths; the diameters of the right rear rod 2A and the right front rod 2C are between 1.5 cm and 4 cm; the left rear rod 1A and the right rear rod 2A are arranged in parallel, horizontally, and at the same height, and the distance between the left rear rod 1A and the right rear rod 2A is 30 cm to 50 cm; the left front rod 1C and the right front rod 2C are arranged in parallel, horizontally, and at the same height; the distance between the left front rod 1C and the right front rod 2C is 30 cm to 50 cm;

[0022] A left hinged connection device 1B is connected between the left rear rod 1A and the left front rod 1C, and the left front rod 1C can be turned and folded toward the left rear rod 1A through the left hinged connection device 1B, that is, the left rear rod 1A and the left front rod 1C are turned and hinged and folded through the left hinged connection device 1B;

[0023] A right hinged connection device 2B is connected between the right rear rod 2A and the right front rod 2C, and the right front rod 2C can be turned and folded toward the right rear rod 2A through the right hinged connection device 2B, that is, the right rear rod 2A and the right front rod 2C are turned and hinged and folded through the right hinged connection device 2B;

[0024] A soft seat cushion 3 is clamped or fixedly connected between the left rear rod 1A and the right rear rod 2A by means of a screw assembly or a snap connection. The soft seat cushion 3 is square in shape as a whole and is used for a person to sit on after the wheelchair is unfolded.

[0025] When the product is packed at the factory and not in use or carried out by the user, the left front rod 1C can be flipped and folded toward the left rear rod 1A through the left hinged connection device 1B to shorten the length on the left side; the right front rod 2C can be flipped and folded toward the right rear rod 2A through the right hinged connection device 2B to shorten the length on the right side; after the left and right rod bodies are folded, the length of the seat is shortened, the packaging volume is compressed, the packaging is more compact and strict, the hollow space of the internal packaging is reduced, and the seat parts are not easily crushed due to the hollow space; when in use, the left front rod 1C and the right front rod 2C are flipped and opened, so that the left rear rod 1A and the left front rod 1C are arranged in the same axial direction, and the right rear rod 2A and the right front rod 2C are arranged in the same axial direction to achieve the original required length; the overall use is convenient, foldable, and flipping and unfolding are convenient for use.

[0026] The rear section of the soft seat cushion 3 is fixedly connected between the left rear rod 1A and the right rear rod 2A by means of a clamp or screw assembly or a clamping connection; the front section of the soft seat cushion 3 is fixedly connected between the left front rod 1C and the right front rod 2C by means of a clamp or screw assembly or a clamping connection;

[0027] The left front rod 1C can be turned and folded toward the left rear rod 1A in a turning motion direction from bottom to top through the left hinge connection device 1B; the right front rod 2C can be turned and folded toward the right rear rod 2A in a turning motion direction from bottom to top through the right hinge connection device 2B; it is convenient for the left front rod 1C, the right front rod 2C and the soft seat cushion 3 to be turned and folded synchronously in a turning motion direction from bottom to top;

[0028] When the left front rod 1C and the right front rod 2C are turned over and folded toward the left rear rod 1A and the right rear rod 2A, the front section of the soft seat cushion 3 is turned over and folded toward the rear section of the soft seat cushion 3 synchronously, which facilitates the folding of the soft seat cushion 3 and shortens the length of the soft seat cushion 3 synchronously. In this way, the soft seat cushion 3 is more neat after folding. The soft seat cushion 3 of the soft body is also convenient for the segmented hinged folding of the rod body.

[0029] The left rear rod 1A, the left front rod 1C and the right rear rod 2A, the right front rod 2C can be brought close together and unfolded through the soft seat cushion 3; when the wheelchair frame is hinged and folded, the left rear rod 1A, the left front rod 1C and the right rear rod 2A, the right front rod 2C are brought close together, and only the soft seat cushion 3 can bring the left rear rod 1A, the left front rod 1C and the right rear rod 2A, the right front rod 2C close together, and the soft seat cushion 3 is synchronously bent and folded; when the wheelchair frame is unfolded, the left rear rod 1A, the left front rod 1C and the right rear rod 2A, the right front rod 2C are separated from each other, and only the soft seat cushion 3 can bring the left rear rod 1A, the left front rod 1C and the right rear rod 2A, the right front rod 2C unfolded, and the soft seat cushion 3 is synchronously straightened and flattened.

[0030] The left hinged connection device 1B includes a left rear joint 1B1, a left screw 1B2, and a left front joint 1B3; the front end of the left rear rod 1A is connected to the left rear joint 1B1 by a threading method and fixed by a nail body; the left rear joint 1B1 and the left front joint 1B3 are connected together by threading the left screw 1B2, and the left rear joint 1B1 and the left front joint 1B3 are movably connected together by the left screw 1B2; the rear end of the left front rod 1C is connected to the left front joint 1B3 by a threading method and fixed by a nail body, and the left front rod 1C and the left front joint 1B3 are flipped and folded toward the left rear joint 1B1 and the left rear rod 1A by using the left screw 1B2 as a base point. This is to further refine the specific structure of the left hinged connection device 1B; the structure is easy to articulate, stable and firm, easy to set up, and easy to assemble;

[0031] The left rear joint 1B1 is a left rear clamping ring, which is fixedly connected to a front end clamping part of the left rear rod 1A. After the left front joint 1B3 is flipped and unfolded relative to the left screw 1B2, the left front joint 1B3 is embedded in the ring hole for positioning, which has a positioning function. At the same time, it prevents a direct gap between the left rear rod 1A and the left front rod 1C on the outside to prevent people from being pinched.

[0032] The right hinged connection device 2B includes a right rear joint 2B1, a right screw 2B2, and a right front joint 2B3; the front end of the right rear rod 2A is connected to the right rear joint 2B1 in a through-connected manner and fixedly connected by a nail body; the right rear joint 2B1 and the right front joint 2B3 are connected together by the right screw 2B2, and the right rear joint 2B1 and the right front joint 2B3 are movably connected together by the right screw 2B2; the rear end of the right front rod 2C is connected to the right front joint 2B3 in a through-connected manner and fixedly connected by a nail body, and the right front rod 2C and the right front joint 2B3 are turned and folded toward the right rear joint 2B1 and the right rear rod 2A by using the right screw 2B2 as a base point;

[0033] This is to further refine the specific structure of the right hinged connection device 2B; the structure is easy to hinge, stable and firm, easy to set up, and easy to assemble;

[0034] The right rear joint 2B1 is a right rear clamp ring. After the right front joint 2B3 is flipped and unfolded relative to the right screw 2B2, the right front joint 2B3 is embedded in the ring hole for positioning, which has a positioning function. At the same time, it prevents a direct gap between the right rear rod 2A and the right front rod 2C on the outside to prevent people from being pinched.

[0035] A seat articulation folding device for a wheelchair also includes an X-shaped articulation frame 4, the X-shaped articulation frame 4 includes a central articulation axis 41, a left tilting rod 42, and a right tilting rod 43, the left tilting rod 42 and the right tilting rod 43 cross and connect the central articulation axis 41 in the middle, the top of the left tilting rod 42 is fixedly connected to the left rear rod 1A, and the top of the right tilting rod 43 is fixedly connected to the right rear rod 2A; the left tilting rod 42 and the right tilting rod 43 are articulated, folded and unfolded with the central articulation axis 41 as a base point; when articulated and folded, the X-shaped articulation frame 4 synchronously drives the left rear rod 1A, the left front rod 1C and the right rear rod 2A, the right front rod 2C to move closer and closer, and the soft seat cushion 3 is synchronously folded; when unfolded, the X-shaped articulation frame 4 synchronously drives the left rear rod 1A, the left front rod 1C and the right rear rod 2A, the right front rod 2C to move away from each other, and the soft seat cushion 3 is synchronously unfolded; the X-shaped articulation frame 4 serves as a support frame for the seat, and its bottom is connected to the wheelchair frame.

Claims

1. A wheelchair seat hinge folding device, comprising a left hinge connection device and a right hinge connection device, characterized in that: It also includes a left rear rod, a left front rod, a right rear rod, a right front rod, and a soft seat cushion. A left hinged connection device is connected between the left rear rod and the left front rod, and the left front rod can be flipped and folded toward the left rear rod through the left hinged connection device; A right hinged connection device is connected between the right rear rod and the right front rod, and the right front rod can be flipped and folded toward the right rear rod through the right hinged connection device; A soft seat cushion is fixedly connected between the left rear rod and the right rear rod.

2. The wheelchair seat articulation folding device according to claim 1, characterized in that: The rear section of the soft seat cushion is fixedly connected between the left rear rod and the right rear rod; the front section of the soft seat cushion is fixedly connected between the left front rod and the right front rod; The left front rod can be turned and folded toward the left rear rod in a turning movement direction from bottom to top through the left hinged connection device; the right front rod can be turned and folded toward the right rear rod in a turning movement direction from bottom to top through the right hinged connection device; The left rear rod, the left front rod and the right rear rod, the right front rod can be brought close to each other and folded or unfolded through a soft seat cushion.

3. The wheelchair seat hinge folding device according to claim 2, characterized in that: When the left front rod and the right front rod are turned over and folded toward the left rear rod and the right rear rod, the front section of the soft seat cushion is turned over and folded toward the rear section of the soft seat cushion simultaneously.

4. The wheelchair seat hinge folding device according to claim 1, characterized in that: The length of the left rear rod is longer than that of the left front rod; the length of the right rear rod is longer than that of the right front rod.

5. The wheelchair seat articulation and folding device according to claim 1, characterized in that: The left hinged connection device includes a left rear joint, a left screw, and a left front joint; the front end of the left rear rod is fixedly connected to the left rear joint; the left rear joint and the left front joint are jointly penetrated by the left screw, and the left rear joint and the left front joint are movably connected together by the left screw; the rear end of the left front rod is fixedly connected to the left front joint, and the left front rod and the left front joint are flipped and folded toward the left rear joint and the left rear rod by using the left screw as a base point.

6. The wheelchair seat articulation and folding device according to claim 5, characterized in that: The left rear joint is a left rear clamping ring, which is fixedly connected to a front end clamping part of the left rear rod. After the left front joint is flipped and unfolded relative to the left screw, the left front joint is embedded in the ring hole.

7. The wheelchair seat articulation and folding device according to claim 1, characterized in that: The right hinged connection device includes a right rear joint, a right screw, and a right front joint; the front end of the right rear rod is fixedly connected to the right rear joint; the right rear joint and the right front joint are jointly penetrated by the right screw, the right rear joint and the right front joint are movably connected, the rear end of the right front rod is fixedly connected to the right front joint, and the right front rod and the right front joint are flipped and folded toward the right rear joint and the right rear rod using the right screw as a base point.

8. The wheelchair seat hinge folding device according to claim 7, characterized in that: The right rear joint is a right rear clamping ring. After the right front joint is flipped and unfolded relative to the right screw, the right front joint is embedded in the ring hole.

9. A wheelchair seat hinge folding device according to any one of claims 1 to 8, characterized in that: It also includes an X-shaped articulated frame, which includes a central articulated axis, a left-tilting rod, and a right-tilting rod. The left-tilting rod and the right-tilting rod have a common middle portion that crosses and connects the central articulated axis. The top of the left-tilting rod is fixedly connected to the left rear rod, and the top of the right-tilting rod is fixedly connected to the right rear rod.

10. A wheelchair seat hinge folding device according to any one of claims 1 to 8, characterized in that: The left rear rod and the left front rod are arranged in the same axial direction; the right rear rod and the right front rod are arranged in the same axial direction; the left rear rod and the right rear rod are arranged in parallel; the left front rod and the right front rod are arranged in parallel.

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