Adjustable folding seat and wheelchair

Abstract

The utility model discloses an adjustable folding seat and wheelchair, which includes a backrest, a cushion and a folding device, wherein the backrest and the cushion are rotatably connected, and the folding device is installed below the cushion. The folding device includes an electric push rod, a folding bracket, a first connecting rod and a second connecting rod, wherein the electric push rod is connected to the folding bracket to drive the folding bracket to compress and fold, the first connecting rod is connected to the top of the folding bracket, one end of the second connecting rod is connected to the first connecting rod, and the other end is against the bottom of the backrest, and when the folding bracket is folded, the backrest is driven to rotate and fold through the first connecting rod and the second connecting rod. The folding device in the utility model adopts a linkage structure, and in the process of folding the bracket, the folding of the backrest can be synchronously driven, and the electric drive control is adopted, so the folding operation is simpler and more labor-saving, which is convenient for the disabled and the elderly to use, and at the same time, the self-locking structure is reduced, and the product structure is simplified.

Description

Technical Field

[0001] The utility model belongs to the technical field of wheelchairs, and in particular relates to an adjustable folding seat and a wheelchair. Background Art

[0002] Folding wheelchairs are a means of transportation for special groups of people, such as the disabled, the elderly and the weak, as well as patients undergoing medical clinical rehabilitation. They are widely used because they can be folded, are easy to carry and take up little space.

[0003] A foldable wheelchair mainly folds the seat assembly so that the space where the seat is located is compressed. Chinese patent CN219878482U discloses a foldable wheelchair self-locking structure and a foldable wheelchair using the same, wherein the foldable wheelchair self-locking structure comprises a front wheel frame, a rear wheel frame, a back frame and a limit rod; the back frame is provided with a back frame connecting pipe, the end of the back frame connecting pipe is bent forward, and a hinge seat is provided at the proximal end of the end of the back frame connecting pipe; the front wheel frame is provided with a front wheel connecting pipe, and the front wheel connecting pipe is hinged to the hinge seat; the top of the rear wheel frame is provided with a self-locking groove, the end of the back frame connecting pipe is hinged to the groove wall of the self-locking groove, and the groove bottom of the self-locking groove is provided with a buckle groove adapted to the back frame connecting pipe, and the buckle groove is located at the rear side of the hinge of the back frame connecting pipe and the self-locking groove; one end of the limit rod is hinged to the side wall of the rear wheel frame, and the other end of the limit rod is hinged to the side wall of the front wheel frame. When the folding wheelchair self-locking structure is unfolded, the end of the back frame connecting pipe is embedded in the buckle groove, and the self-locking groove and the back frame connecting pipe cooperate to achieve a self-locking effect, thereby improving safety and stability.

[0004] Most of the existing folding wheelchairs use a self-locking structure to self-lock the folding structure, and each component of the wheelchair needs to be self-locked and folded separately. Therefore, the wheelchair has many parts and the overall structure is relatively complex. At the same time, it is not convenient for the disabled and the elderly to store or use it by themselves. Utility Model Content

[0005] In view of the defects or shortcomings in the above-mentioned prior art, the utility model aims to provide a folding seat and a wheelchair with a simple structure, linked folding and extending, and adjustable seat back angle.

[0006] The purpose of this application is to achieve the following technical solutions:

[0007] An adjustable folding seat comprises a backrest, a cushion portion and a folding device, wherein the backrest and the cushion portion are rotatably connected, and the folding device is installed below the cushion portion. The folding device comprises an electric push rod, a folding bracket, a first connecting rod and a second connecting rod, wherein the electric push rod is connected to the folding bracket to drive the folding bracket to compress and fold, the first connecting rod is connected to the top of the folding bracket, one end of the second connecting rod is connected to the first connecting rod, and the other end is abutted against the bottom of the backrest portion, and when the folding bracket is folded, the backrest portion is driven to rotate and fold through the first connecting rod and the second connecting rod.

[0008] Preferably, the folding bracket is provided with two groups, which are symmetrically installed under the cushion part, and the folding bracket includes a lower mounting seat, an upper mounting seat, an upper folding rod and a lower folding rod. The upper folding rod and the lower folding rod are arranged in parallel, and the upper and lower ends of the upper folding rod and the lower folding rod are respectively hinged to the upper mounting seat and the lower mounting seat, and the lower mounting seat, the upper mounting seat, the upper folding rod and the lower folding rod form a parallelogram structure.

[0009] Preferably, the electric push rod is arranged between the two groups of folding brackets, and the electric push rod is respectively connected to the lower folding rods of the two groups of folding brackets through a cross bar. When the electric push rod contracts, the two groups of folding brackets are folded and compressed.

[0010] Preferably, the first connecting rod is connected to one of the groups of folding brackets, the first connecting rod is composed of two steel pipes, the angle between the two steel pipes is 130-150°, the lower end of the first connecting rod is hinged at the connection between the lower folding rod and the upper mounting seat, and the upper end of the first connecting rod is hinged to the second connecting rod.

[0011] Preferably, the backrest portion is connected to the cushion portion through a rotating member, and the rotating member includes a backrest support, a rotating shaft and a right-angle plate. The backrest support is fixedly connected to the rear portion of the backrest portion, the lower end of the backrest support is connected to the right-angle plate, the upper portion of the right-angle plate is connected to the lower bottom portion of the backrest portion, the right-angle plate is connected to the cushion portion through the rotating shaft, and the end portion of the second connecting rod is slidably connected to the right-angle surface of the right-angle plate.

[0012] Preferably, a mounting groove is provided at the bottom of the cushion portion, and the first connecting rod and the second connecting rod are located in the mounting groove.

[0013] Preferably, the cushion portion is supported by a first connecting rod and a second connecting rod.

[0014] Preferably, the rotation angle of the backrest is 0 to 110°.

[0015] Preferably, the upper folding rod and the lower folding rod are both made of square steel.

[0016] A wheelchair comprises an adjustable folding seat, a wheel assembly and a frame assembly, wherein the lower ends of the electric push rod and the folding bracket are fixed on the frame assembly, and the wheel assembly is installed at the bottom of the frame assembly.

[0017] Compared with the prior art, this application has at least the following obvious advantages and effects:

[0018] 1. The folding device in the utility model adopts a linkage structure. During the folding process of the bracket, the backrest can be driven to fold synchronously. In addition, electric drive control is adopted, and the folding operation is simpler and more labor-saving, which is convenient for the disabled and the elderly to use. At the same time, the self-locking structure is reduced and the product structure is simplified.

[0019] 2. The utility model can control the angle and height of the backrest and the seat cushion according to the stretching and contraction distance of the electric push rod, thereby improving the comfort of product use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural stereogram of the utility model;

[0021] Figure 2 It is a structural schematic diagram of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the folding device in the utility model;

[0023] Figure 4 yes Figure 2 A magnified view of middle;

[0024] Figure 5 It is a structural schematic diagram of the wheelchair in the utility model;

[0025] Figure 6 It is a schematic diagram of a wheelchair backrest at a 90° angle in Embodiment 2 of the present utility model;

[0026] Figure 7 It is a schematic diagram of a wheelchair backrest at an angle of 110° in Embodiment 2 of the present utility model;

[0027] Figure 8 is a schematic diagram of the wheelchair folding process in Embodiment 2 of the present utility model;

[0028] Fig. 9 is a schematic diagram of a folded wheelchair in Embodiment 2 of the present utility model;

[0029] List of parts in this application:

[0030] 1. Backrest; 2. Cushion; 3. Folding device; 4. Rotating member; 5. Frame assembly; 6. Wheel assembly; 31. Electric push rod; 32. Folding bracket; 33. First connecting rod; 34. Second connecting rod; 35. Cross bar; 41. Backrest support; 42. Rotating shaft; 43. Right angle plate; 321. Lower mounting seat; 322. Upper mounting seat; 323. Upper folding rod; 324. Lower folding rod. DETAILED DESCRIPTION

[0031] Specific embodiments of the present application are described in conjunction with the accompanying drawings and the following description to teach those skilled in the art how to make and use the best mode of the present application. In order to teach the principles of the application, some conventional aspects have been simplified or omitted. Those skilled in the art should understand that variations from these embodiments fall within the scope of the present application. Those skilled in the art should understand that the following features can be combined in various ways to form multiple variations of the present application. Terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this application are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the utility model without substantial changes in the technical content. Therefore, the present application is not limited to the following specific embodiments, but is only limited by the claims and their equivalents.

[0032] Example 1

[0033] like Figures 1 to 4 As shown, the present embodiment relates to an adjustable folding seat, which is a seat for a wheelchair, and comprises a backrest portion 1, a cushion portion 2 and a folding device 3. The backrest portion 1 and the cushion portion 2 are rotatably connected, and the folding device 3 is installed below the cushion portion 2. The folding device 3 comprises an electric push rod 31, a folding bracket 32, a first connecting rod 33 and a second connecting rod 34. The electric push rod 31 is connected to the folding bracket 32 ​​to drive the folding bracket 32 ​​to compress and fold. The first connecting rod 33 is connected to the top of the folding bracket 32. One end of the second connecting rod 34 is connected to the first connecting rod 33, and the other end is abutted against the bottom of the backrest portion 1. When the folding bracket 32 ​​is folded, the backrest portion 1 is driven to rotate and fold to overlap with the cushion portion 2 through the first connecting rod 33 and the second connecting rod 34. The present application adopts a linkage method to achieve synchronous folding of the support bracket and the backrest. The folding device 3 provided in this embodiment can not only support the backrest part 1 and the cushion part 2, but also realize the folding of multiple parts. At the same time, the angle height of the backrest part 1 and the cushion part 2 can be adjusted according to the telescopic distance of the electric push rod 31 in the folding device 3. One structure realizes multiple functions.

[0034] like Figure 1 and Figure 3 As shown, in the embodiment of the present application, the folding bracket 32 ​​is provided with two groups, which are symmetrically installed under the cushion portion 2. The folding bracket 32 ​​includes a lower mounting seat 321, an upper mounting seat 322, an upper folding rod 323 and a lower folding rod 324. The upper folding rod 323 and the lower folding rod 324 are arranged in parallel. The upper folding rod 323 and the lower folding rod 324 are both square steel structures. The upper and lower ends of the upper folding rod 323 and the lower folding rod 324 are respectively hinged to the upper mounting seat 322 and the lower mounting seat 321. Specifically, as shown in FIG. Figure 6As shown, the upper mounting seat 322 is provided with an intersecting hole 322a and an intersecting hole 322b, the lower mounting seat 321 is provided with an intersecting hole 321a and a hinge hole 321b, the two ends of the upper folding rod 323 are connected with the hinge hole 321b and the intersecting hole 322b, and the two ends of the lower folding rod 324 are connected with the hinge hole 321a and the intersecting hole 322a, so that the lower mounting seat 321, the upper mounting seat 322, the upper folding rod 323 and the lower folding rod 324 form a parallelogram structure.

[0035] The electric push rod 31 is disposed between the two groups of folding brackets 32. The electric push rod 31 is connected to the lower folding rods 324 of the two groups of folding brackets 32 through the cross bar 35. When the electric push rod 31 contracts, the two groups of folding brackets 32 are folded and compressed.

[0036] In an embodiment of the present application, the first connecting rod 33 is connected to one group of folding brackets 32. The first connecting rod 33 is composed of two steel pipes, and the two steel pipes are an integrated structure. The angle between the two steel pipes is 140°. The lower end of the first connecting rod 33 is hinged at the connection between the lower folding rod 324 and the upper mounting seat 322, that is, the intersection hole 322a. The upper end of the first connecting rod 33 is hinged to the second connecting rod 34. The first connecting rod 33 and the second connecting rod 34 are located in the mounting groove at the bottom of the cushion part 2, and the cushion part 2 is supported by the first connecting rod 33 and the second connecting rod 34.

[0037] like Figure 2 and Figure 4 As shown, in the embodiment of the present application, the backrest portion 1 is connected to the cushion portion 2 through a rotating member 4, and the rotating member 4 includes a backrest support 41, a rotating shaft 42 and a right-angle plate 43. The backrest support 41 is fixedly connected to the rear portion of the backrest portion 1 for supporting the rear side of the backrest portion 1, the lower end of the backrest support 41 is connected to the right-angle plate 43, the upper portion of the right-angle plate 43 is connected to the lower bottom portion of the backrest portion 1, and the right-angle plate 43 is connected to the cushion portion 2 through the rotating shaft 42. The end of the second connecting rod 34 is slidably connected to the right-angle surface of the right-angle plate 43, but at the same time is limited by the right-angle plate 43, that is, no matter whether the second connecting rod 34 moves forward or backward, the second connecting rod 34 will not separate from the right-angle plate 43; when the second connecting rod 34 is pushed backward, the end of the second connecting rod 34 slides with the end surface of the right-angle plate 43, and pushes the entire rotating member 4 to rotate, thereby causing the backrest portion 1 to rotate and fold.

[0038] In this embodiment, the rotation angle of the backrest is 0 to 110°, 0° is the angle at which the backrest 1 and the cushion 2 overlap after folding, 110° is the angle of the backrest 1 after the patient sits down, and there are also backrest angles of 90° and 95°.

[0039] Example 2

[0040] like Figure 5As shown, this embodiment relates to a wheelchair, which includes the adjustable folding seat, wheel assembly 6 and frame assembly 5 in Example 1, the lower ends of the electric push rod 31 and the folding bracket 32 ​​are fixed on the frame assembly 5, and the wheel assembly 6 is installed at the bottom of the frame assembly 5.

[0041] The adjustment principle of the wheelchair in this application is:

[0042] Under normal conditions, Figure 5 As shown, at this time, the angle between the backrest 1 and the cushion 2 is about 95°, and the front end of the cushion 2 is slightly tilted. When the patient gets on the wheelchair, Figure 6 As shown, the folding device 3 can be used to adjust the angle between the backrest 1 and the cushion 2 to nearly 90 degrees. At the same time, the front end of the cushion 2 is slightly tilted forward to facilitate the patient to sit on it. After the patient sits on the wheelchair, the angle between the backrest 1 and the cushion 2 is adjusted to 110 degrees again. Figure 7 As shown, the patient has a more comfortable sitting position.

[0043] The folding principle of the wheelchair in this application is:

[0044] Under normal conditions, Figure 5-7 As shown, at this time, the angle between the backrest portion 1 and the cushion portion 2 is between 90° and 110°. When the electric push rod 31 is retracted, the electric push rod 31 drives the folding bracket 32 ​​to tilt and fold. When the folding bracket 32 ​​is folded, as shown in FIG. Figure 8 As shown, the first connecting rod 33 drives the second connecting rod 34 to move backward, and the rear end of the second connecting rod 34 applies pressure to the right angle plate 43 and slides with it. The right angle plate 43 turns downward with the rotating shaft 42 as the rotation center, thereby driving the backrest 1 to rotate and fold to the top of the seat cushion. After folding, Fig. 9 shown.

[0045] Since it is easy for those skilled in the art to think of it, any modification, equivalent substitution, improvement, etc. made within the concept and principle of the application should be included in the scope of the claims of this application.

Claims

1. An adjustable folding seat, comprising a backrest, a cushion and a folding device, wherein the backrest and the cushion are rotatably connected, and the folding device is installed under the cushion, characterized in that: The folding device includes an electric push rod, a folding bracket, a first connecting rod and a second connecting rod. The electric push rod is connected to the folding bracket to drive the folding bracket to compress and fold. The first connecting rod is connected to the top of the folding bracket. One end of the second connecting rod is connected to the first connecting rod, and the other end is against the bottom of the backrest. When the folding bracket is folded, the backrest is driven to rotate and fold through the first connecting rod and the second connecting rod.

2. The adjustable folding seat according to claim 1, characterized in that: The folding bracket is provided with two groups, which are symmetrically installed under the cushion part. The folding bracket includes a lower mounting seat, an upper mounting seat, an upper folding rod and a lower folding rod. The upper folding rod and the lower folding rod are arranged in parallel. The upper and lower ends of the upper folding rod and the lower folding rod are respectively hinged to the upper mounting seat and the lower mounting seat. The lower mounting seat, the upper mounting seat, the upper folding rod and the lower folding rod form a parallelogram structure.

3. The adjustable folding seat according to claim 2, characterized in that: The electric push rod is arranged between the two groups of folding brackets. The electric push rod is connected to the lower folding rods of the two groups of folding brackets through the cross bar. When the electric push rod is retracted, the two groups of folding brackets are folded and compressed.

4. The adjustable folding seat according to claim 2, characterized in that: The first connecting rod is connected to one of the folding brackets. The first connecting rod is composed of two steel pipes. The angle between the two steel pipes is 130-150 degrees. The lower end of the first connecting rod is hinged at the connection between the lower folding rod and the upper mounting seat, and the upper end of the first connecting rod is hinged to the second connecting rod.

5. The adjustable folding seat according to claim 1, characterized in that: The backrest portion is connected to the cushion portion through a rotating member, and the rotating member includes a backrest support, a rotating shaft and a right-angle plate. The backrest support is fixedly connected to the rear portion of the backrest portion, the lower end of the backrest support is connected to the right-angle plate, the upper portion of the right-angle plate is connected to the lower bottom portion of the backrest portion, the right-angle plate is connected to the cushion portion through the rotating shaft, and the end portion of the second connecting rod is slidably connected to the right-angle surface of the right-angle plate.

6. The adjustable folding seat according to claim 1, characterized in that: A mounting groove is provided at the bottom of the cushion portion, and the first connecting rod and the second connecting rod are located in the mounting groove.

7. The adjustable folding seat according to claim 1, characterized in that: The cushion portion is supported by a first connecting rod and a second connecting rod.

8. The adjustable folding seat according to claim 1, characterized in that: The rotation angle of the backrest is 0 to 110 degrees.

9. The adjustable folding seat according to claim 2, characterized in that: The upper folding rod and the lower folding rod are both made of square steel.

10. A wheelchair, characterized in that: It comprises the adjustable folding seat, wheel assembly and frame assembly as described in any one of claims 1 to 9, the lower ends of the electric push rod and the folding bracket are fixed on the frame assembly, and the wheel assembly is installed at the bottom of the frame assembly.

Images