Foldable wheelchair backrest

Abstract

The utility model discloses a foldable wheelchair backrest which comprises two folding rods distributed in parallel, a backrest cushion is arranged between the two folding rods, each folding rod comprises a bottom rod and a top rod, the top end of each bottom rod is provided with a connector, one side of the top end of each connector is provided with a notch, and the top end of each connector is provided with a backrest cushion. The bottom of the ejector rod is located in the notch and rotationally connected with the connector through a connecting shaft, and a locking structure is arranged between the ejector rod and the connector. According to the folding wheelchair, the convex lugs are matched with the top rods, so that the top rods and the bottom rods can be conveniently folded, when the wheelchair is not used, the backrest of the wheelchair can be folded down to reduce the size of the wheelchair, the wheelchair is convenient to carry, transport and store, and the practicability is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of wheelchairs, and in particular relates to a foldable wheelchair backrest. Background Art

[0002] Nowadays, many people have difficulty in moving due to illness or accidents and need other means of transportation. Wheelchairs are simple in structure and easy to use, so they are the best choice. However, wheelchairs still have certain defects. The existing wheelchair backrest is an integrated structure, which makes the overall volume of the wheelchair larger, making it inconvenient to carry, transport and store, and has poor practicality. Utility Model Content

[0003] The utility model aims to provide a foldable wheelchair backrest to solve the technical problems raised in the background technology.

[0004] To achieve the above-mentioned purpose, the specific technical scheme of the utility model is as follows: a foldable wheelchair backrest, comprising two folding rods distributed in parallel, a backrest pad is arranged between the two folding rods, the folding rod comprises a bottom rod and a top rod, a connecting head is arranged at the top of the bottom rod, a notch is arranged on one side of the top of the connecting head, the bottom of the top rod is located in the notch and is rotatably connected to the connecting head through a connecting shaft, and a locking structure is arranged between the top rod and the connecting head.

[0005] Preferably, the connecting head is an elliptical structure, and the shape of the push rod matches the shape of the connecting head.

[0006] Preferably, lugs are provided on both sides of the notch, and the connecting shafts on both sides of the bottom of the push rod are rotatably connected to the lugs.

[0007] Preferably, the locking structure includes a positioning column and a toggle block, the side wall of the push rod is provided with a through hole, the positioning column passes through the through hole and is slidably connected to the through hole, the side wall of the connecting head is provided with positioning holes distributed corresponding to the through holes, the surface of the toggle block is provided with a through hole, the end of the positioning column passes through the through hole and is rotatably connected to the through hole through a rotating shaft, and a mounting groove with a diameter larger than the through hole is provided in the bottom of the push rod, the positioning column is sleeved with a stopper slidably connected to the mounting groove, and the positioning column is sleeved with a spring, one end of the spring is connected to the side wall of the stopper, and the other end is connected to the inner wall of the mounting groove.

[0008] Preferably, limiting protrusions are provided on both sides of the toggle block, and the convex surfaces of the limiting protrusions are in contact with the side walls of the notch.

[0009] The foldable wheelchair backrest of the utility model has the following advantages:

[0010] 1. The utility model facilitates folding between the top rod and the bottom rod through the cooperation between the lug and the top rod, so that the backrest of the wheelchair can be folded down when not in use to reduce the volume of the wheelchair, making it easier to carry, transport and store the wheelchair, and having strong practicality.

[0011] 2. When the push rod is folded into a vertical shape, the bottom of the push rod will be inside the connector. At this time, the positioning column is inserted into the positioning hole under the elastic force of the spring, and the push rod is locked and fixed. When the push rod needs to be folded, the toggle block is moved by hand. At this time, the toggle block drives the positioning column to move, so that the positioning column is disengaged from the positioning hole, and the push rod can be folded. The operation is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a structural schematic diagram of the folding rod in the utility model;

[0015] Figure 3 It is a structural schematic diagram of the push rod in the utility model.

[0016] Explanation of markings in the figure: 1. folding rod; 2. back cushion; 3. bottom rod; 4. connecting head; 5. notch; 6. lug; 7. positioning hole; 8. top rod; 9. connecting shaft; 10. toggle block; 11. limiting protrusion; 12. positioning column; 13. stopper; 14. spring; 15. through hole. DETAILED DESCRIPTION

[0017] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0018] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0019] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0020] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0021] The disclosure below provides many different embodiments or examples for realizing different structures of the embodiments of the present utility model. In order to simplify the disclosure of the embodiments of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present utility model. In addition, the embodiments of the present utility model can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0022] In order to better understand the purpose, structure and function of the present invention, a foldable wheelchair backrest of the present invention is further described in detail below in conjunction with the accompanying drawings.

[0023] like Figure 1-3As shown, a foldable wheelchair backrest of the utility model comprises two folding rods 1 distributed in parallel, a backrest pad 2 is arranged between the two folding rods 1, the folding rod 1 comprises a bottom rod 3 and a top rod 8, a connector 4 is arranged at the top of the bottom rod 3, a notch 5 is arranged at one side of the top of the connector 4, the bottom of the top rod 8 is located in the notch 5 and is rotatably connected to the connector 4 through a connecting shaft 9, the connector 4 is an elliptical structure, the shape of the top rod 8 matches the shape of the connector 4, through the cooperation between the top rod 8 and the connector 4, when the top rod 8 is folded into a straight line with the bottom rod 3, the connection between the connector 4 and the top rod 8 is more tightly and firmly. Lugs 6 are arranged on both sides of the notch 5, the connecting shafts on both sides of the bottom of the top rod 8 are rotatably connected to the lugs 6, through the cooperation between the lugs 6 and the top rod 8, it is convenient to fold the top rod 8 and the bottom rod 3, so that when it is not needed, the backrest of the wheelchair can be folded down to reduce the volume of the wheelchair, which is convenient for carrying, transporting and storing the wheelchair, and has strong practicality.

[0024] A locking structure is provided between the top rod 8 and the connector 4, and the locking structure includes a positioning column 12 and a toggle block 10. A through hole 15 is provided on the side wall of the top rod 8, and the positioning column 12 passes through the through hole 15 and is slidably connected with the through hole 15. The side wall of the connector 4 is provided with positioning holes 7 distributed corresponding to the through hole 15. A through hole is provided on the surface of the toggle block 10, and the end of the positioning column 12 passes through the through hole and is rotatably connected with the through hole through a rotating shaft. A mounting groove with a diameter larger than the through hole 15 is provided in the bottom of the top rod 8, and a stopper 13 slidably connected with the mounting groove is sleeved on the positioning column 12, and a spring 14 is sleeved on the positioning column 12, and one end of the spring 14 It is connected to the side wall of the stopper 13, and the other end is connected to the inner wall of the mounting groove. Limiting protrusions 11 are provided on both sides of the toggle block 10, and the convex surface of the limiting protrusion 11 contacts the side wall of the notch 5. When the push rod 8 is folded into a vertical shape, the bottom of the push rod 8 will be inside the connecting head 4. At this time, under the elastic force of the spring 14, the positioning column 12 is inserted into the positioning hole 7, and the push rod 8 is locked and fixed. When the push rod 8 needs to be folded, the toggle block 10 is toggled by hand. At this time, the toggle block 10 drives the positioning column 12 to move, so that the positioning column 12 is disengaged from the positioning hole 7, and the push rod 8 can be folded. The operation is simple and convenient.

[0025] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A foldable wheelchair backrest, characterized in that: It comprises two folding rods (1) arranged in parallel, with a backrest cushion (2) arranged between the two folding rods (1); wherein: The folding rod (1) comprises a bottom rod (3) and a top rod (8); a connector (4) is provided at the top end of the bottom rod (3); a notch (5) is provided on one side of the top end of the connector (4); the bottom of the top rod (8) is located in the notch (5) and is rotatably connected to the connector (4) via a connecting shaft (9); and a locking structure is provided between the top rod (8) and the connector (4).

2. A foldable wheelchair backrest according to claim 1, characterized in that: The connecting head (4) is an elliptical structure, and the shape of the top rod (8) matches the shape of the connecting head (4).

3. The foldable wheelchair backrest according to claim 1, characterized in that: Lugs (6) are provided on both sides of the notch (5), and connecting shafts on both sides of the bottom of the push rod (8) are rotatably connected to the lugs (6).

4. The foldable wheelchair backrest according to claim 1, characterized in that: The locking structure comprises a positioning column (12) and a toggle block (10), the side wall of the push rod (8) is provided with a through hole (15), the positioning column (12) passes through the through hole (15) and is slidably connected to the through hole (15), the side wall of the connector (4) is provided with positioning holes (7) distributed corresponding to the through hole (15), the surface of the toggle block (10) is provided with a through hole, the end of the positioning column (12) passes through the through hole and is rotatably connected to the through hole through a rotating shaft, and a mounting groove with a diameter larger than the through hole (15) is provided in the bottom of the push rod (8), the positioning column (12) is sleeved with a stopper (13) slidably connected to the mounting groove, and the positioning column (12) is sleeved with a spring (14), one end of the spring (14) is connected to the side wall of the stopper (13), and the other end is connected to the inner wall of the mounting groove.

5. The foldable wheelchair backrest according to claim 4, characterized in that: Limiting protrusions (11) are provided on both sides of the toggle block (10), and the raised surfaces of the limiting protrusions (11) are in contact with the side walls of the notch (5).

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