Seat lateral supporting device and wheelchair

Abstract

The invention relates to a seat lateral supporting device which comprises a supporting plate, two swing rods, a swing rod seat, a first locking mechanism and a second locking mechanism, each swing rod comprises a first connecting part, a third connecting part and a second connecting part which are sequentially arranged in the height direction of a seat, and the first connecting parts and the second connecting parts are arranged in the height direction of the seat. An included angle is formed between the third connecting part and the height direction of the seat; the first connecting part, the second connecting part and the third connecting part form a Z-shaped structure; the first connecting part is connected with the supporting plate and can rotate relative to the supporting plate, and the first locking mechanism is used for fixing the first connecting part and the supporting plate; the second connecting part is connected with the swing rod seat and can rotate relative to the swing rod seat, and the second locking mechanism is used for fixing the second connecting part and the swing rod seat.

Description

Technical Field

[0001] The present invention relates to an auxiliary fixing device, in particular to a seat lateral supporting device. The present invention also relates to a wheelchair. Background Art

[0002] Seat width is an important parameter of a wheelchair. It determines whether the user's thighs can be comfortably supported from the side. An inappropriate seat width will affect riding stability and comfort. The seat width of existing wheelchairs is not very convenient to adjust. It requires a relatively large and heavy frame to operate, which is more physically demanding. In addition, the seats of wheelchairs are all square, which cannot provide sufficient lateral support for users with tilted sitting postures. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a seat lateral support device, which provides comfortable support for users with different sitting postures. At the same time, the user does not need to make large-scale and high-force body movements to adjust the seat lateral support device.

[0004] In order to solve the above technical problems, the present invention provides a seat lateral support device, including a support plate, two rocker arms, a rocker arm seat, a first locking mechanism and a second locking mechanism, the rocker arm including a first connecting portion, a third connecting portion and a second connecting portion which are sequentially arranged along the seat height direction, the first connecting portion and the second connecting portion are both arranged along the seat height direction, the third connecting portion is arranged at an angle to the seat height direction, and the first connecting portion, the second connecting portion and the third connecting portion form a Z-shaped structure; the first connecting portion is connected to the support plate and can rotate relative to the support plate, and the first locking mechanism is used to fix the first connecting portion to the support plate; the second connecting portion is connected to the rocker arm seat and can rotate relative to the rocker arm seat, and the second locking mechanism is used to fix the second connecting portion to the rocker arm seat.

[0005] The first locking mechanism and the second locking mechanism can be loosened and locked by loosening and tightening nuts, so that the user only needs to loosen a few nuts, move the support plate to the required position, and then tighten the loosened nuts again to complete the seat width adjustment without large-scale and strong body movements. A seat lateral support device can be set on each side of the seat. The user can adjust the angle of the support plate so that the two support plates form a " / / " shape structure to adapt to the skewed sitting posture; or the two support plates form a "\ / " shape structure that opens forward to make the seat have better wrapping.

[0006] Preferably, in order to facilitate the adjustment of the position of the support plate in the depth direction of the seat, the seat lateral support device also includes a slide rail and a fourth locking mechanism. The slide rail is arranged along the depth direction of the seat, and the two rocker rods are arranged at intervals along the depth direction of the seat. The rocker rod seat can move along the slide rail, and the fourth locking mechanism is used to fix the rocker rod seat and the slide rail.

[0007] The present invention also provides a wheelchair, comprising a seat plate, wherein a seat lateral support device is respectively arranged on the left and right sides of the seat plate, and a rocker base of the seat lateral support device is directly or indirectly fixed to the seat plate.

[0008] A wheelchair with two seat lateral support devices can provide personalized support for users with different sitting postures and body shapes, improving the user's riding stability and comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a structural diagram of a seat lateral support device of the present invention installed on a wheelchair; Figure 2 for Figure 1 An exploded view of the seat lateral support device 100-1 is shown; Figure 3a for Figure 1 A three-dimensional view of the seat lateral support device 100-1 is shown; Figure 3b for Figure 3a The seat lateral support device 100-1 is shown along Figure 3a The stereoscopic view after the direction of the middle arrow is adjusted; Figure 3c for Figure 3b The seat lateral support device 100-1 is shown along Figure 3b The stereoscopic view after the direction of the middle arrow is adjusted; Figure 4 for Figure 1 a perspective view of the metal insert of the support plate shown; Figure 5 for Figure 1 The structural diagram shows that the two support plates are adjusted to a "\ / "-shaped structure that opens forward. DETAILED DESCRIPTION

[0010] The seat lateral support device provided by the present invention is used to support the buttocks and / or thighs of a sitting user from the side of the seat, and at the same time limit the movement range of the user's buttocks and / or thighs. It can be installed on a wheelchair or on other seats. It can be installed upright (the support plate is located above the rocker seat in the direction of gravity) or inverted (the support plate is located below the rocker seat in the direction of gravity), and is used to achieve slight adjustments in the seat width and / or improve the wrapping of the seat.

[0011] The present invention is further described below in conjunction with the accompanying drawings and one of the embodiments of the present invention. In this embodiment, the seat lateral support device is mounted on the wheelchair seat plate. Figure 1The seat lateral support devices 100-2 and 100-1 are mirror-imaged and fixedly mounted on the left and right sides of the wheelchair seat plate 200, respectively. By adjusting the seat lateral support devices 100-2 and 100-1, the seat width of the wheelchair seat can be changed and / or the wrapping property of the seat can be improved.

[0012] Combine the following Figure 2 , 3a to 3c and Figure 4 The structure and adjustment method of the seat lateral supporting device 100 - 1 will be described.

[0013] See also Figure 2 The seat lateral support device 100-1 includes a support plate 1, two swing rods 2, a swing rod seat 3, a first locking mechanism and a second locking mechanism. The swing rod 2 includes a first connecting portion 21, a second connecting portion 22 and a third connecting portion 23. The first connecting portion 21 and the second connecting portion 22 are both arranged along the seat height direction h as a whole, and the third connecting portion 23 is arranged at an angle to the seat height direction h as a whole. The first connecting portion 21, the third connecting portion 23 and the second connecting portion 22 are arranged in sequence along the seat height direction h to form a Z-shaped structure. The first connecting portion 21 is connected to the support plate 1 and can rotate relative to the support plate 1. The first locking mechanism is used to fix the first connecting portion 21 to the support plate 1. The second connecting portion 22 is connected to the swing rod seat 3 and can rotate relative to the swing rod seat 3. The second locking mechanism is used to fix the second connecting portion 22 to the swing rod seat 3. The swing rod 2 of this embodiment is a Z-shaped round rod with a simple structure and easy to manufacture. In other embodiments of the present invention, the swing rod 2 may also be in other shapes, and only needs to include three parts forming a Z-shaped structure, so that the distance between the support plate 1 and the swing rod seat 3 along the seat width direction w is adjustable.

[0014] The first locking mechanism includes a first pressing plate 41 and two first locking bolts 42. To achieve a stable connection between the first locking bolts 42 and the support plate 1, a metal insert 11 is provided in the support plate 1. The structure of the metal insert 11 is as follows: Figure 4 As shown, a plurality of through holes are provided so that the injection material and the metal insert 11 can be more firmly combined during injection molding. The first connecting portion 21 is sandwiched between the first pressing plate 41 and the support plate 1, and the first locking bolt 42 is threadedly connected with the first pressing plate 41 and the metal insert 11 in turn.

[0015] A socket 31 along the seat height direction h is provided on the rocker arm seat 3 corresponding to a second connecting portion 22. The second connecting portion 22 is inserted into the corresponding socket 31. The second locking mechanism includes four second locking bolts 51 and corresponding locking nuts 52. A through hole 32 along the seat height direction h is also provided on the rocker arm seat 3. The through hole 32 connects the two sockets 31. The second locking bolt 51 penetrates the through hole 32 along the seat width direction w, and at the same time penetrates the rocker arm seat 3 and is connected to the corresponding locking nut 52.

[0016] In order to improve the stability of the seat lateral support device, a third locking mechanism is also provided, which includes two third locking bolts 63, a locking seat 62 and two second pressing plates 61 arranged opposite to each other. The second connecting portion 22 is sandwiched between the two second pressing plates 61. The third locking bolt 63 passes through the two second pressing plates 61 in sequence along the seat width direction w and is threadedly connected with the locking seat 62. In order to reduce the manufacturing cost, the first pressing plate 41 and the second pressing plate 61 have the same structure. For the convenience of assembly, the structures of the first pressing plate 41 and the second pressing plate 61 are symmetrical in the seat height direction h and the seat depth direction d.

[0017] In this embodiment, the friction force of the first pressing plate 41 and the support plate 1 on the first connection part 21, the friction force of the two second pressing plates 61 on the second connection part 22, and the friction force of the swing rod seat 3 on the second connection part 22 prevent the swing rod 2 from rotating unexpectedly. The friction force of the first pressing plate 41 and the support plate 1 on the first connection part 21 prevents the support plate 1 from being separated from the swing rod 2 along the height direction h, and the friction force of the swing rod seat 3 on the second connection part 22 prevents the swing rod 2 from being separated from the swing rod seat 3 along the height direction h.

[0018] After loosening the first locking bolt 42, the second locking bolt 51 and the third locking bolt 63, the support plate 1 can be grasped and applied to adjust the distance between the support plate 1 and the swing rod seat 3 in the seat width direction w, thereby adjusting the seat width; the angle between the support plate 1 and the swing rod seat 3 can also be adjusted to meet the special needs of the user, provide more appropriate support for the user's hips and / or thighs, and improve the wrapping of the seat, for example, see Figure 5 The left and right support plates 1 can be adjusted to a "\ / "-shaped structure that opens forward.

[0019] When adjusting the spacing between the support plate 1 and the rocker seat 3 in the seat width direction w, the position of the support plate 1 along the seat depth direction d will also change. Therefore, the seat lateral support device also includes a slide rail 7 and a fourth locking mechanism. The slide rail 7 is arranged along the seat depth direction d, and the two rockers 2 are arranged at intervals along the seat depth direction d. The rocker seat 3 can move along the slide rail 7, and the fourth locking mechanism is used to fix the rocker seat 3 and the slide rail 7. The fourth locking mechanism includes two fourth locking bolts 81 and corresponding locking blocks 82. The slide rail 7 is a C-shaped structure, and the locking blocks 82 in the slide rail 7 are limited along the seat height direction h. The fourth locking bolt 81 passes through the rocker seat 3 along the seat height direction h and is threadedly connected with the corresponding locking block 82. The rocker seat 3 is provided with a limiting step 33 corresponding to the fourth locking bolt 51, and the head of the fourth locking bolt 81 is placed on the limiting step 33. The slide rail 7 is fixed to the wheelchair seat 200 through the fixing assembly 71. The fourth locking bolt 81 is loosened, and the swing rod seat 3 is grasped to adjust the position of the support plate 1 in the seat depth direction d. The position of the fixing assembly 71 relative to the slide rail 7 in the seat depth direction d is adjustable, and can be adapted to different wheelchair seat plates 200. Figure 1 The size of the seat plate 200 along the seat depth direction d is adjustable, and the seat plate 200 is provided with a plurality of mounting holes 201 for fixing the front fixing assembly 71 of the slide rail 7. After the seat plate 200 is adjusted to different lengths, the front fixing assembly 71 of the slide rail 7 can be locked to different mounting holes 201.

[0020] In other embodiments of the present invention, if the slide rail structure is not provided, a plurality of holes may be provided on the seat plate instead, and the position of the support plate 1 in the seat depth direction d may be changed by locking the rocker seat 3 in different holes.

[0021] contrast Figure 3b and 3a ,Will Figure 3a The seat lateral support device in the state shown is pressed Figure 3a After adjusting the direction of the middle arrow, you can get Figure 3b The seat lateral support device in the shown state. Figure 3c and 3b ,Will Figure 3b The seat lateral support device in the state shown is pressed Figure 3b After adjusting the direction of the middle arrow, you can get Figure 3c The seat lateral support device in the state shown. The user only needs to tighten eight bolts, grab the support plate 1 and the swing rod seat 3 and apply force lightly to complete the adjustment of the seat lateral support device without large-scale and strong body movements.

Claims

1. A seat lateral support device, used to laterally support the buttocks and / or thighs of a user sitting on the seat, characterized in that: The invention comprises a support plate (1), two swing rods (2), a swing rod seat (3), a first locking mechanism and a second locking mechanism. The swing rod (2) comprises a first connecting portion (21), a third connecting portion (23) and a second connecting portion (22) which are sequentially arranged along a seat height direction (h). The first connecting portion (21) and the second connecting portion (22) are both arranged along the seat height direction (h). The third connecting portion (23) is arranged at an angle to the seat height direction (h). The first connecting portion (21), the second connecting portion (22) and the third connecting portion (23) form a Z-shaped structure. The first connecting portion (21) is connected to the support plate (1) and can rotate relative to the support plate (1). The first locking mechanism is used to fix the first connecting portion (21) and the support plate (1). The second connecting portion (22) is connected to the swing rod seat (3) and can rotate relative to the swing rod seat (3). The second locking mechanism is used to fix the second connecting portion (22) and the swing rod seat (3).

2. The seat lateral support device according to claim 1, characterized in that: A metal insert (11) is provided in the support plate (1), the first locking mechanism comprises a first pressing plate (41) and a plurality of first locking bolts (42), the first connecting portion (21) is clamped between the first pressing plate (41) and the support plate (1), and the first locking bolts (42) are threadedly connected to the first pressing plate (41) and the metal insert (11) in sequence.

3. The seat lateral support device according to claim 2, characterized in that: The seat lateral support device also includes a third locking mechanism, which includes a plurality of third locking bolts (63), a locking seat (62) and two second pressure plates (61) arranged opposite to each other, the second connecting portion (22) is clamped between the two second pressure plates (61), and the third locking bolt (63) passes through the two second pressure plates (61) in sequence along the seat width direction (w) and is threadedly connected to the locking seat (62).

4. The seat lateral support device according to claim 3, characterized in that: The swing rod (2) is a Z-shaped round rod, and the first pressing plate (41) and the second pressing plate (61) have the same structure.

5. The seat lateral support device according to claim 1, characterized in that: A plug hole (31) along the seat height direction (h) is provided on the swing rod seat (3) corresponding to a second connecting portion (22), the second connecting portion (22) is inserted into the corresponding plug hole (31), the second locking mechanism comprises a plurality of second locking bolts (51) and corresponding locking nuts (52), the swing rod seat (3) is further provided with a through hole (32) along the seat height direction (h), the through hole (32) is connected to the two plug holes (31), the second locking bolt (51) passes through the through hole (32) along the seat width direction (w), and at the same time passes through the swing rod seat (3), and is connected to the corresponding locking nut (52).

6. The seat lateral support device according to any one of claims 1 to 5, characterized in that: The seat lateral support device further comprises a slide rail (7) and a fourth locking mechanism, the slide rail (7) being arranged along the seat depth direction (d), the two swing rods (2) being arranged at intervals along the seat depth direction (d), the swing rod seat (3) being movable along the slide rail (7), and the fourth locking mechanism being used to fix the swing rod seat (3) and the slide rail (7).

7. The seat lateral support device according to claim 6, characterized in that: The fourth locking mechanism comprises a plurality of fourth locking bolts (81) and corresponding locking blocks (82); the slide rail (7) is a C-shaped structure, and the locking blocks (82) in the slide rail (7) are limited in a seat height direction (h); the fourth locking bolts (81) penetrate the swing arm seat (3) in the seat height direction (h) and are threadedly connected to the corresponding locking blocks (82); a limiting step (33) is provided on the swing arm seat (3) corresponding to the fourth locking bolts (81); and the head of the fourth locking bolt (81) is placed on the limiting step (33).

8. A wheelchair, comprising a seat plate (200), characterized in that: A seat lateral support device (100-1, 100-2) as described in any one of claims 1 to 7 is respectively provided on the left and right sides of the seat plate (200), and the rocker seat (3) of the seat lateral support device (100-1, 100-2) is directly or indirectly fixed to the seat plate (200).

Images