Standing assisting mechanism and chair

Abstract

A standing assisting mechanism and a chair belong to the technical field of chairs. The lifting device comprises a fixing support, a lifting support and a linear driving device, the front portion and the rear portion of the fixing support are rotationally connected with a lower front rod and a lower rear rod respectively, the front portion and the rear portion of the lifting support are rotationally connected with an upper front rod and an upper rear rod respectively, the upper front rod is rotationally connected with the lower front rod, and the upper rear rod is rotationally connected with the lower rear rod. A linkage rod is arranged between a rotary connecting point of the upper front rod and the lower front rod and a rotary connecting point of the upper rear rod and the lower rear rod; the upper rear rod and the lower rear rod are longer than the upper front rod and the lower front rod, and the linear driving device is arranged between the fixing support and the rear portion of the lifting support. In the process of assisting a person in standing, the standing assisting device can provide an effective supporting effect, and the burden of legs in the process is relieved.

Description

Technical Field

[0001] This utility model relates to the field of chair technology, and in particular to a mechanism and chair that can assist users with leg disabilities to stand up from a chair. Background Technology

[0002] Currently, to help elderly people and others with mobility issues stand up from chairs, some chairs are equipped with structures to assist in standing. For example, Chinese utility model patent No. ZL202122366068.X discloses a prefabricated assistive standing chair, which includes a detachably connected seat body and an assistive standing structure. The assistive standing structure includes a bottom support frame located at the lower end of the seat body and an adjustment device located between the seat body and the bottom support frame. The bottom support frame is connected to the seat body at the front end via a rotating structure. The adjustment device extends its own length to allow the seat body to rotate upward about the rotating structure as an axis, thereby assisting in standing.

[0003] However, existing assisted standing chairs do not provide adequate support for the human body during the standing process, which can easily cause the legs to be subjected to greater gravity prematurely. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the prior art and to provide a standing assistance mechanism and chair that can provide effective support and reduce the burden on the legs during the process of assisting a person to stand.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A standing support mechanism includes a fixed support, a lifting support, and a linear drive device. The front and rear parts of the fixed support are rotatably connected to a lower front rod and a lower rear rod, respectively. The front and rear parts of the lifting support are rotatably connected to an upper front rod and an upper rear rod, respectively. The upper front rod is rotatably connected to the lower front rod, and the upper rear rod is rotatably connected to the lower rear rod. A connecting rod is provided between the rotatable connection points of the upper front rod and the lower front rod and the rotatable connection points of the upper rear rod and the lower rear rod. The lengths of the upper rear rod and the lower rear rod are both greater than the lengths of the upper front rod and the lower front rod. The linear drive device is located between the rear parts of the fixed support and the lifting support.

[0007] Preferably, a first limiting rod is provided at the lower front of the lifting bracket, and a second limiting rod is rotatably connected to the rear of the fixed bracket, with the first limiting rod and the second limiting rod being rotatably connected.

[0008] Preferably, the upper front rod and the lower front rod are respectively located on both sides of the connecting rod, and the upper rear rod and the lower rear rod are respectively located on both sides of the connecting rod.

[0009] Preferably, the upper front rod, lower front rod, upper rear rod, and lower rear rod are all provided with bent portions to increase the distance between the upper front rod and the lower front rod, and the distance between the upper rear rod and the lower rear rod.

[0010] Preferably, the rotatable connection points of the upper front rod and the lower front rod, as well as the rotatable connection points of the upper rear rod and the lower rear rod, are both located near the front side.

[0011] Preferably, the lower front rod is rotatably connected to the upper end of the fixed bracket, and the upper end of the fixed bracket is provided with a support column to support the lifting bracket.

[0012] Preferably, the linear drive device uses a linear slide, and the drive seat and slider of the linear slide are rotatably connected to the lifting bracket and the fixed bracket, respectively.

[0013] Preferably, the front of the fixed bracket is provided with a mounting bracket extending to the rear, and the linear drive device is rotatably connected to the mounting bracket.

[0014] Preferably, the length of the lifting bracket in the front-to-back direction is greater than the length of the fixed bracket in that direction.

[0015] This specification also provides a chair, including a support frame, a seat, and a standing assistance mechanism as described above, wherein the fixed bracket is disposed inside the support frame, and the lifting bracket is disposed on the lower side of the seat.

[0016] The advantages of this utility model are:

[0017] 1. The lifting support can tilt and lift simultaneously, thus providing sufficient support for the body during the standing process and reducing the burden on the legs.

[0018] 2. The tilting and lifting actions of the lifting support are completed by a single mechanism, which is simple in structure and low in cost;

[0019] 3. The movement of the lifting support is limited and guided by the first and second limit rods to ensure the stability of the movement. Attached Figure Description

[0020] Figure 1 A side view of a standing aid mechanism in its initial state, provided as an embodiment of this specification;

[0021] Figure 2 This is a side view of a standing aid mechanism in an elevated state, as provided in an embodiment of this specification.

[0022] Figure 3 A bottom view of a standing aid mechanism provided in an embodiment of this specification;

[0023] Figure 4A side view of a chair provided as an embodiment of this specification. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] As mentioned in the background section, existing assisted standing chairs typically tilt by rotating the seat upwards around its front end to assist the body in transitioning from a sitting to a standing position. However, during the seat rotation, because the body's feet are always or prematurely touching the ground, the body's weight is gradually shifted to the legs, especially when the legs are not fully extended, which inevitably increases the burden on the legs, particularly the knee joints.

[0026] Therefore, such as Figure 1-3 As shown, this embodiment provides a standing assistance mechanism, including a fixed bracket 1, a lifting bracket 2, and a linear drive device 3. The fixed bracket 1 is used to install on the support frame of a chair, the upper side of the lifting bracket 2 is used to install the chair seat, and the linear drive device 3 is disposed between the fixed bracket 1 and the lifting bracket 2. Thus, under the drive of the linear drive device 3, the lifting bracket 2 moves up and down relative to the fixed bracket 1, thereby realizing the lifting action of the chair seat relative to the chair support frame.

[0027] Referring to the front, back, left, and right orientations of the chair, the front and rear parts of the fixed bracket 1 are rotatably connected to a lower front rod 41 and a lower rear rod 51, respectively. The front and rear parts of the lifting bracket 2 are rotatably connected to an upper front rod 42 and an upper rear rod 52, respectively. The upper front rod 42 is rotatably connected to the lower front rod 41, and the upper rear rod 52 is rotatably connected to the lower rear rod 51. A connecting rod 6 is provided between the rotatable connection points of the upper front rod 42 and the lower front rod 41 and the upper rear rod 52 and the lower rear rod 51. That is, the lower end of the upper front rod 42, the upper end of the lower front rod 41, and the front end of the connecting rod 6 are coaxially rotatably connected, and the lower end of the upper rear rod 52, the upper end of the lower rear rod 51, and the rear end of the connecting rod 6 are coaxially rotatably connected. In addition, the lengths of the upper rear rod 52 and the lower rear rod 51 are both greater than the lengths of the upper front rod 42 and the lower front rod 41. The linear drive device 3 is rotatably connected between the rear parts of the fixed bracket 1 and the lifting bracket 2. Of course, to ensure structural strength and stability, the aforementioned linkage structure has two sets, left and right. The operating principle is as follows: Initial state as... Figure 1As shown, the linear drive device 3 pushes the rear of the lifting bracket 2 to rise. At this time, the upper rear rod 52 and the lower rear rod 51 are gradually pulled apart from their horizontally overlapping state. During this process, the connection point of the upper rear rod 52 and the lower rear rod 51 will move. In this embodiment, it moves backward, thereby driving the connection point of the upper front rod 42 and the lower front rod 41 to move backward synchronously through the connecting rod 6, so that the upper front rod 42 and the lower front rod 41 are also pulled apart synchronously from their horizontally overlapping state, thus raising the front of the lifting bracket 2. Furthermore, since the length of both rear rods is greater than the length of both front rods, the lifting speed of the rear of the lifting bracket 2 will be greater than the lifting speed of the front during the synchronous action. Therefore, the lifting bracket will simultaneously produce a tilt that is lower in the front and higher in the back during the lifting process, and the state after lifting is as follows. Figure 2 As shown. Therefore, in assisting the human body to stand, this embodiment also simultaneously raises the human buttocks to a certain extent, so that most of the human body's weight is always borne by the seat, avoiding the legs from being subjected to a large amount of weight in advance, especially when the legs are not fully straight, thereby reducing the burden on the knee joint.

[0028] To ensure the stability of the lifting support 2's lifting action, a first limiting rod 71 is fixedly installed at the lower front of the lifting support 2, and a second limiting rod 72 is rotatably connected to the rear of the fixed support 1. The first limiting rod 71 and the second limiting rod 72 are rotatably connected, with the second limiting rod 72 coaxially rotatably connected to the lower rear rod 51 at the rear of the fixed support 1. Correspondingly, there are two sets of limiting rods, left and right. In this way, by setting mutually rotatably connected limiting rods between the fixed support 1 and the lifting support 2, the lifting path of the lifting support 2 relative to the fixed support 1 is effectively limited and guided, thereby improving the stability of the action.

[0029] To avoid interference between the upper front rod 42 and the lower front rod 41, the upper front rod 42 and the lower front rod 41 are respectively located on both sides of the connecting rod 6. Similarly, to avoid interference between the upper rear rod 52 and the lower rear rod 51, the upper rear rod 52 and the lower rear rod 51 are respectively located on both sides of the connecting rod 6. To further avoid the above-mentioned interference, the distance between the two rods can be increased. Since there is a connecting rod between the rotating connection ends of the two rods, there will be no interference at that end. It is only necessary to increase the distance between the other parts of the two rods. For this purpose, the upper front rod 42, the lower front rod 41, the upper rear rod 52, and the lower rear rod 51 are all provided with bent parts to increase the distance between the upper front rod 42 and the lower front rod 41, and the distance between the upper rear rod 52 and the lower rear rod 51.

[0030] To avoid interference with other structures of the chair, the rotation connection points of the upper front rod 42 and the lower front rod 41, as well as the rotation connection points of the upper rear rod 52 and the lower rear rod 51, are all located near the front.

[0031] Since the rear of the lifting bracket 2 is supported by the linear drive device 3, while the front needs to be supported by the upper front rod 42 and the lower front rod 41, in order to improve the support strength, the lower front rod 41 is rotatably connected to the upper end of the fixed bracket 1, that is, the upper end surface of the fixed bracket 1 is used as the support surface. Correspondingly, in order to prevent the lifting bracket 2 from pressing on the linkage structure in the reset state, the upper end of the fixed bracket 1 is provided with a support column 11 to support the lifting bracket 2.

[0032] To increase the operating range of the linear drive device 3, a linear slide table can be used. The drive seat 31 and the slider 32 of the linear slide table are rotatably connected to the lifting bracket 2 and the fixed bracket 1, respectively. At the same time, the front of the fixed bracket 1 is provided with a mounting bracket 12 extending to the rear, and the linear drive device 3 is rotatably connected to the mounting bracket 12 to further increase the operating range of the linear drive device 3.

[0033] Finally, in order to ensure that the lifting bracket 2 can still cover the fixed bracket 1 after tilting, the length of the lifting bracket 2 in the front-to-back direction is greater than the length of the fixed bracket 1 in that direction.

[0034] like Figure 4 As shown in the embodiment of this specification, a chair is also provided, including a support frame 100, a seat 200, and a standing assistance mechanism as described above. The fixed bracket 1 is disposed inside the support frame 100, and the lifting bracket 2 is disposed on the lower side of the seat 200.

[0035] The above are merely preferred embodiments of this utility model, and are implementations based on the overall concept of this utility model. Furthermore, the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A standing assistance mechanism, comprising a fixed support, a lifting support, and a linear drive device, characterized in that, The front and rear parts of the fixed bracket are rotatably connected to a lower front rod and a lower rear rod, respectively. The front and rear parts of the lifting bracket are rotatably connected to an upper front rod and an upper rear rod, respectively. The upper front rod is rotatably connected to the lower front rod, and the upper rear rod is rotatably connected to the lower rear rod. A connecting rod is provided between the rotatable connection points of the upper front rod and the lower front rod and the rotatable connection points of the upper rear rod and the lower rear rod. The lengths of the upper rear rod and the lower rear rod are both greater than the lengths of the upper front rod and the lower front rod. The linear drive device is located between the rear parts of the fixed bracket and the lifting bracket.

2. The standing assistance mechanism according to claim 1, characterized in that, A first limiting rod is provided at the lower front of the lifting bracket, and a second limiting rod is rotatably connected to the rear of the fixed bracket. The first limiting rod and the second limiting rod are rotatably connected.

3. The standing assistance mechanism according to claim 1, characterized in that, The upper front rod and lower front rod are respectively located on both sides of the connecting rod, and the upper rear rod and lower rear rod are respectively located on both sides of the connecting rod.

4. A standing assistance mechanism according to claim 1, characterized in that, The upper front rod, lower front rod, upper rear rod, and lower rear rod are all provided with bent sections to increase the distance between the upper front rod and the lower front rod, as well as the distance between the upper rear rod and the lower rear rod.

5. A standing assistance mechanism according to claim 1, characterized in that, The rotatable connection points of the upper front rod and the lower front rod, as well as the rotatable connection points of the upper rear rod and the lower rear rod, are both located near the front side.

6. A standing assistance mechanism according to claim 1, characterized in that, The lower front rod is rotatably connected to the upper end of the fixed bracket, and the upper end of the fixed bracket is provided with a support column to support the lifting bracket.

7. A standing assistance mechanism according to claim 1, characterized in that, The linear drive device uses a linear slide table, and the drive seat and slider of the linear slide table are rotatably connected to the lifting bracket and the fixed bracket, respectively.

8. A standing assistance mechanism according to claim 1, characterized in that, The front of the fixed bracket is provided with a mounting bracket extending to the rear, and the linear drive device is rotatably connected to the mounting bracket.

9. A standing assistance mechanism according to claim 1, characterized in that, The length of the lifting bracket in the front-to-back direction is greater than the length of the fixed bracket in that direction.

10. A chair, characterized in that, It includes a support frame, a seat, and a standing assistance mechanism as described in any one of claims 1-9, wherein the fixed bracket is disposed inside the support frame and the lifting bracket is disposed on the lower side of the seat.

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