A stand assist chair with armrests

Abstract

The utility model discloses a kind of sit-up auxiliary chairs with handrails, it is related to the technical field of rehabilitation auxiliary instrument, including auxiliary chair mechanism and the handrail mechanism assembled on the auxiliary chair mechanism;The auxiliary chair mechanism includes chair frame, the top of the chair frame is fixedly installed with backrest frame, the inside of the chair frame is equipped with two arc grooves, the inside of the arc groove is slidably installed with arc slide bar, first elastic member is fixedly installed between the arc slide bar and the arc groove, sit-up board is fixedly installed between the arc slide bar;The handrail mechanism includes two sleeve columns slidably installed in the top of the chair frame, the sleeve column is distributed in the two sides of the sit-up board, the top of the sleeve column is sleevedly installed with telescopic column, by being provided with auxiliary chair mechanism, the biomechanical characteristics when human body sits up can be according to, auxiliary human body completes the compound action of gravity center forward, hip joint extension and knee joint power, effectively improve the power effect.

Description

Technical Field

[0001] This utility model relates to the field of rehabilitation assistive devices, specifically to a sitting-up assistive chair with armrests. Background Technology

[0002] The elderly population experiences varying degrees of mobility impairment, with difficulty getting up and sitting down being one of the core issues affecting their quality of life. Due to osteoporosis, wear and tear of articular cartilage, or bone hyperplasia, the elderly are prone to joint stiffness and pain after sitting for a long time, which can lead to difficulty getting up and sitting down. At the same time, for those recovering from surgery, such as those who have undergone hip replacement surgery or have deep vein thrombosis in the lower extremities, their mobility is significantly restricted, making it more inconvenient to get up and sit down.

[0003] However, traditional chairs are usually fixed in height, which cannot assist people with difficulty getting up. Currently, chairs with height adjustment functions have appeared on the market. They mainly rely on electric drive to achieve vertical height adjustment to achieve the effect of assisting in getting up. Although they can solve the height adjustment problem, they do not fully consider the biomechanical characteristics of the human body when getting up. When users go from standing to sitting and from sitting to standing, they need to complete a complex action of shifting their center of gravity forward, extending their hip joints, and exerting force on their knee joints. Pure vertical height adjustment only provides one-way support, resulting in low assistance efficiency and causing more inconvenience to users. Utility Model Content

[0004] The purpose of this invention is to provide a sitting-up assist chair with armrests to solve the problem that the existing technology does not fully consider the biomechanical characteristics of the human body when sitting up, resulting in low assist efficiency and causing many inconveniences for users.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sitting-up assist chair with armrests, comprising:

[0006] An auxiliary chair mechanism and an armrest mechanism mounted on the auxiliary chair mechanism;

[0007] The auxiliary chair mechanism includes a chair frame, a backrest frame fixedly installed on the top of the chair frame, two arc-shaped grooves opened inside the chair frame, arc-shaped sliding rods slidably installed inside the arc-shaped grooves, a first elastic element fixedly installed between the arc-shaped sliding rods and the arc-shaped grooves, and a sitting plate fixedly installed between the arc-shaped sliding rods.

[0008] The armrest mechanism includes two sleeve columns that are slidably mounted on the top of the chair frame. The sleeve columns are distributed on both sides of the sitting plate. A telescopic column is sleeved on the top of the sleeve column. A support plate is fixedly mounted on the top of the telescopic column. A handle is fixedly mounted on the front end of the support plate.

[0009] Furthermore, a backrest cushion is fixedly installed at the front end of the backrest frame, and a seat cushion is fixedly installed at the top of the sitting board.

[0010] Furthermore, the sitting board and the arc-shaped slide bar are fixedly installed together by a fixing block, and the bottom of the chair frame is fixedly installed with anti-slip feet.

[0011] Furthermore, a locking frame is fixedly installed at the bottom of the sleeve column, and a locking groove is provided at the rear end of the arc-shaped slide rod to engage with the locking frame.

[0012] Furthermore, the chair frame has an internal groove for the locking frame to slide in, and a second elastic element is fixedly installed between the locking frame and the groove.

[0013] Furthermore, the sleeve column and the telescopic column are fixed together by a fixing bolt, and a comfort pad is fixedly installed on the top of the support plate.

[0014] Compared with existing technologies, this utility model provides a sitting-up assist chair with armrests. Through the inclusion of an assist chair mechanism, the sitting board is initially tilted, allowing it to conform to the buttocks during the transition from standing to sitting, helping the user maintain their center of gravity. The user's weight presses the sitting board downwards, and the curved sliding rod slides along the curved groove, allowing the sitting board to move slowly downwards in an arc trajectory. This provides cushioning during the transition from standing to sitting, effectively reducing the strain on the hip and knee joints. When the user returns to standing, the sitting board bounces back to its original position in an arc trajectory, providing auxiliary support. Based on the biomechanical characteristics of the human body during sitting up, this assists in completing the combined movements of forward weight shift, hip extension, and knee joint exertion, effectively improving the assistive effect.

[0015] The locking mechanism and locking slot work together to ensure the sitting board is level when the user transitions from a standing to a sitting position. The locking mechanism then locks the curved slide bar in the locking slot, preventing it from being subjected to the elastic force of the first elastic element and thus avoiding pressure on the user's buttocks. When the user needs to stand up, pressing the armrest mechanism releases the locking mechanism from the locking slot, releasing the locking effect on the curved slide bar and allowing the sitting board to pop out normally to provide auxiliary support for the user's buttocks, thus providing greater convenience. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a schematic diagram of the first morphological structure provided for an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the second form structure provided in the embodiment of the present utility model;

[0019] Figure 3 This is a schematic cross-sectional view of the chair frame provided in an embodiment of the present utility model;

[0020] Figure 4 A schematic diagram of the arc-shaped groove structure provided in an embodiment of this utility model;

[0021] Figure 5 This is a schematic diagram of the sitting plate structure provided in an embodiment of the present utility model;

[0022] Figure 6 A schematic diagram of the handrail mechanism provided in an embodiment of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Auxiliary chair mechanism; 11. Chair frame; 12. Anti-slip legs; 13. Backrest frame; 14. Backrest cushion; 15. Seat board; 16. Seat cushion; 17. Arc-shaped slide bar; 18. Arc-shaped groove; 19. First elastic element; 110. Movable groove; 111. Fixing block; 112. Locking groove; 2. Armrest mechanism; 21. Sleeve column; 22. Fixing bolt; 23. Telescopic column; 24. Support plate; 25. Comfort cushion; 26. Handle; 27. Locking frame; 28. Second elastic element. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0026] As attached Figure 1 To be continued Figure 6 As shown:

[0027] Example 1:

[0028] This utility model provides a sitting-up assist chair with armrests, comprising:

[0029] Auxiliary chair mechanism 1 and armrest mechanism 2 mounted on auxiliary chair mechanism 1;

[0030] The auxiliary chair mechanism 1 includes a chair frame 11, a backrest frame 13 fixedly installed on the top of the chair frame 11, two arc-shaped grooves 18 are opened inside the chair frame 11, arc-shaped slide rods 17 are slidably installed inside the arc-shaped grooves 18, a first elastic element 19 is fixedly installed between the arc-shaped slide rods 17 and the arc-shaped grooves 18, and a sitting plate 15 is fixedly installed between the arc-shaped slide rods 17.

[0031] The armrest mechanism 2 includes two sleeve columns 21 that are slidably mounted on the top of the chair frame 11. The sleeve columns 21 are distributed on both sides of the seat plate 15. A telescopic column 23 is sleeved on the top of the sleeve column 21. A support plate 24 is fixedly mounted on the top of the telescopic column 23. A handle 26 is fixedly mounted on the front end of the support plate 24.

[0032] As can be seen from the above, when using this device, it is placed in a suitable position. In the initial state, the sitting plate 15 is raised and tilted. When a person sits on the sitting plate 15, the slope of the sitting plate 15 can fit against the buttocks, allowing the person to maintain their center of gravity. The person's weight can apply pressure to the sitting plate 15, causing it to move downwards. The arc-shaped slide rod 17 can slide along the arc-shaped groove 18, compressing the first elastic element 19, which is a thrust spring. The curved slide bar 17 provides a pushing force, allowing it to slide slowly and enabling the sitting board 15 to move slowly downwards in an arc-shaped trajectory. This adapts to the arc-shaped movement trajectory of the human body from a standing to a sitting position, helping to cushion the transition and effectively reducing the force exerted by the user's hip and knee joints. During the transition from a standing to a sitting position, the user can easily support their body by holding the handle 26, which provides leverage and allows the user to use their arm strength to support their body and prevent them from tipping over.

[0033] The telescopic column 23 can slide up and down along the sleeve column 21, allowing for easy adjustment of the height of the support plate 24. The support plate 24 provides arm support in a seated position. When the body moves from a seated to a standing position, the arms can be supported on the support plate 24 to propel the body upwards. Simultaneously, the hands can grip the handle 26 to stabilize the body's center of gravity. The first elastic element 19 restores elastic potential energy, providing a pushing force to the arc-shaped slide rod 17. When the body stands up, the first elastic element 19 pushes the arc-shaped slide rod 17 upwards along the arc-shaped groove 18, causing the sitting plate 15 to bounce upwards in an arc-shaped trajectory to return to its original position. This provides auxiliary support for the buttocks, making it easier for the body to stand up. Based on the biomechanical characteristics of the body when sitting up, this system assists the body in completing a complex movement of forward shift of the center of gravity, hip extension, and knee joint exertion, effectively improving the assistive effect.

[0034] From the appendix Figure 3 It can be seen that a backrest 14 is fixedly installed at the front end of the backrest frame 13, and a seat cushion 16 is fixedly installed at the top of the sitting board 15.

[0035] As can be seen from the above, in a sitting position, the backrest 13 can support the back of the human body, the backrest 14 can cushion the back of the human body, thus improving the comfort effect of the backrest 13 in supporting the back of the human body, and the seat cushion 16 can improve the comfort in a sitting position.

[0036] For details, please refer to the appendix. Figure 3 As shown, the sitting board 15 and the arc-shaped slide bar 17 are fixedly installed together by a fixing block 111, and the bottom of the chair frame 11 is fixedly installed with anti-slip feet 12.

[0037] As can be seen from the above, the fixing block 111 can fix the sitting board 15 to the two arc-shaped sliding rods 17, so that the sitting board 15 can maintain a stable state during the extension and retraction of the arc-shaped sliding rods 17, and is not easy to tilt. The anti-slip feet 12 can increase the friction between the chair frame 11 and the ground, and is not easy to slip during use, thus improving the stability of the human body during the sitting and getting up process.

[0038] For details, please refer to the appendix. Figure 3 Appendix Figure 5 and attached Figure 6 As shown, a locking frame 27 is fixedly installed at the bottom of the sleeve column 21, and a locking groove 112 that engages with the locking frame 27 is provided at the rear end of the arc-shaped slide rod 17.

[0039] As can be seen from the above, when the arc-shaped slide bar 17 is fully slid into the arc-shaped groove 18, the locking groove 112 corresponds to the locking frame 27, allowing the locking frame 27 to be inserted into the locking groove 112 and locking the arc-shaped slide bar 17. In the unlocked state, the arc-shaped slide bar 17 will not slide out of the arc-shaped groove 18, preventing the arc-shaped slide bar 17 from being subjected to the elastic force of the first elastic element 19, thus preventing the sitting plate 15 from pressing on the buttocks of the human body. When the human body needs to stand up, by supporting themselves on the armrest mechanism 2 with their arms, they can press the sleeve column 21 downwards, which can cause the locking frame 27 to separate from the locking groove 112, releasing the locking effect on the arc-shaped slide bar 17. This allows the sitting plate 15 to pop out normally and provide auxiliary support to the buttocks of the human body, bringing more convenience to the user.

[0040] Working principle: When a person sits on the sitting board 15, the inclination angle of the sitting board 15 can fit against the buttocks for tilt support, stabilizing the body's center of gravity. The body's center of gravity can push the sitting board 15 downwards. The curved slide rod 17 slides along the curved groove 18, allowing the sitting board 15 to move in an arc-shaped trajectory, adapting to the body's movement trajectory from standing to sitting. The first elastic element 19 pushes the curved slide rod 17, allowing the sitting board 15 to descend slowly, providing assistance and cushioning during the transition from standing to sitting. When standing up, the handle 26 provides support for the body, and the sitting board 15 can spring upwards, assisting in shifting the body's center of gravity forward and providing support for standing up, making it easier for the body to complete the standing action.

[0041] Example 2:

[0042] Reference Appendix Figure 3 and attached Figure 4 As shown, the chair frame 11 has an internal movable groove 110 for the locking frame 27 to slide, and a second elastic member 28 is fixedly installed between the locking frame 27 and the movable groove 110.

[0043] As can be seen from the above, the movable groove 110 provides a space for the locking frame 27 to move, allowing the locking frame 27 to move up and down easily. When the locking frame 27 moves downward, it can separate from the locking groove 112, thus releasing the locking effect on the arc-shaped slide bar 17. The second elastic element 28 is a thrust spring, which can apply a thrust to the locking frame 27. When the arc-shaped slide bar 17 slides completely into the arc-shaped groove 18, the locking groove 112 corresponds to the locking frame 27, allowing the second elastic element 28 to push the locking frame 27 upward and engage it in the locking groove 112, thus automatically completing the locking effect on the arc-shaped slide bar 17.

[0044] Reference Appendix Figure 6 As shown, the sleeve column 21 and the telescopic column 23 are fixed together by a fixing bolt 22, and a comfort pad 25 is fixedly installed on the top of the support plate 24.

[0045] As can be seen from the above, after adjusting the telescopic column 23 to a suitable height position, the telescopic column 23 can be fixed by rotating the fixing bolt 22 to prevent the telescopic column 23 from accidentally slipping. When the arm is placed on the support plate 24, the comfort pad 25 can be used to support the arm, which can improve the comfort effect.

[0046] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A sitting-up assist chair with armrests, characterized in that, include: An auxiliary chair mechanism (1) and an armrest mechanism (2) mounted on the auxiliary chair mechanism (1); The auxiliary chair mechanism (1) includes a chair frame (11), a backrest frame (13) is fixedly installed on the top of the chair frame (11), two arc-shaped grooves (18) are opened inside the chair frame (11), an arc-shaped slide rod (17) is slidably installed inside the arc-shaped groove (18), a first elastic element (19) is fixedly installed between the arc-shaped slide rod (17) and the arc-shaped groove (18), and a sitting board (15) is fixedly installed between the arc-shaped slide rods (17). The armrest mechanism (2) includes two sleeve columns (21) slidably mounted on the top of the chair frame (11). The sleeve columns (21) are distributed on both sides of the sitting board (15). A telescopic column (23) is sleeved on the top of the sleeve column (21). A support plate (24) is fixedly mounted on the top of the telescopic column (23). A handle (26) is fixedly mounted on the front end of the support plate (24).

2. The chair with armrests for assisting sitting up according to claim 1, characterized in that, A cushion (14) is fixedly installed at the front end of the backrest frame (13), and a seat cushion (16) is fixedly installed at the top of the sitting board (15).

3. The chair with armrests for assisting sitting up according to claim 1, characterized in that, The sitting board (15) and the arc-shaped slide bar (17) are fixedly installed together by a fixing block (111), and the bottom of the chair frame (11) is fixedly installed with anti-slip feet (12).

4. A chair with armrests for assisting sitting up according to claim 1, characterized in that, A locking frame (27) is fixedly installed at the bottom of the sleeve column (21), and a locking groove (112) is provided at the rear end of the arc-shaped slide rod (17) to engage with the locking frame (27).

5. A sitting-up assist chair with armrests according to claim 4, characterized in that, The chair frame (11) has an internal movable groove (110) for the locking frame (27) to slide, and a second elastic element (28) is fixedly installed between the locking frame (27) and the movable groove (110).

6. A sitting-up assist chair with armrests according to claim 1, characterized in that, The sleeve column (21) and the telescopic column (23) are fixed together by a fixing bolt (22), and a comfort pad (25) is fixedly installed on the top of the support plate (24).

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