Reclining chair back structure that conforms to human curves

Abstract

The utility model relates to the technical field of leisure seat, disclose the leisure seat backrest structure of fitting human body curve, including chair body and slide rail, the top of chair body is provided with backrest, the inner wall rotation of slide rail is connected with the threaded rod, the outer wall of threaded rod is connected with the sliding block of screw thread, the inner wall fixed connection of sliding block has fixed block, the inner wall fixed connection of sliding block has fixed cam, the opposite side fixed connection of fixed block and fixed cam has the slide rod, the outer wall sliding connection of slide rod has the moving link, the outer wall sliding connection of moving link has the support rod, the top rotation of support rod is connected with the support plate, the bottom of chair body is provided with leg support subassembly. In the utility model, through the linkage of angle adjusting device and support plate, when the leisure seat lies down, the support and stability of backrest are realized, when the leisure chair is straight, can provide the book board and place article, improve the overall function diversity and comfort.

Description

Technical Field

[0001] This utility model relates to the field of leisure seating technology, and in particular to a leisure seating backrest structure that conforms to the curves of the human body. Background Technology

[0002] A lounge chair is a chair we use to enjoy our leisure time. Unlike dining chairs and office chairs, these chairs are not formal; they have a touch of personality and provide both visual and physical comfort. As people's living standards improve, their demands for the comfort of lounge chairs are also increasing.

[0003] Traditional lounge chairs have backrest angle adjustment functions, which can be adjusted through the adjuster under the backrest. However, in order to maintain the stability when a person is lying on the chair, the adjustment angle is small, resulting in poor comfort. When the backrest angle is adjusted too large, the center of gravity of the lounge chair will shift backward and it is easy to tip over, posing a safety hazard. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a backrest structure for a leisure chair that conforms to the curves of the human body, aiming to improve the problem that traditional leisure chairs are not comfortable when the backrest adjustment angle is small, and are prone to tipping over when the adjustment angle is too large.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a reclining chair back structure that conforms to the curves of the human body, comprising a chair body and a slide rail. A backrest is provided at the top of the chair body, and a support groove is fixedly connected to the rear end of the backrest. A threaded rod is rotatably connected to the inner wall of the slide rail, and a slider is threadedly connected to the outer wall of the threaded rod. A fixing block is fixedly connected to the inner wall of the slider, and a fixing cam is fixedly connected to the inner wall of the slider. A sliding rod is fixedly connected to the opposite side of the fixing block and the fixing cam. A spring is sleeved on the outer wall of the sliding rod, and a moving rod is slidably connected to the outer wall of the sliding rod. A support rod is slidably connected to the outer wall of the moving rod, and a support plate is rotatably connected to the top of the support rod. A leg support assembly is provided at the bottom of the chair body.

[0006] Preferably, the leg support assembly includes a fixing groove, which is fixedly connected to the bottom end of the chair body. A sliding groove is slidably connected to the inner wall of the chair body, and a drawer is slidably connected to the inner wall of the sliding groove. Multiple connecting blocks are fixedly connected to the lower surface of the sliding groove. An adjusting rod is fixedly connected to one side of two of the connecting blocks. A leg support plate is rotatably connected to the outer wall of the adjusting rod. Multiple locking blocks are fixedly connected to one end of the leg support plate.

[0007] Preferably, a motor is fixedly connected to one end of the slide rail, and the output end of the motor is fixedly connected to one end of the threaded rod.

[0008] Preferably, a rack is provided on the right side of the bottom end of the movable rod, and a rack is provided on the left side of the fixed cam, and the movable rod and the fixed cam are meshed together.

[0009] Preferably, the support plate is slidably connected to the inner wall of the support slot.

[0010] Preferably, the inner wall of the fixing groove is provided with a working groove, and the leg support plate is slidably connected in the working groove. The width of the leg support plate is the same as the width of the slide rail.

[0011] Preferably, the bottom end of the backrest is provided with an adjuster, the slider is slidably connected to the inner wall of the slide rail, and the left end of the spring is fixedly connected to the surface of the fixing block.

[0012] Preferably, the slide rail is located directly below the chair body, four support legs are fixedly connected to the bottom of the chair body, and a handle is provided on the outer wall of the adjuster.

[0013] This utility model has the following beneficial effects:

[0014] 1. In this utility model, the linkage of the slide rail, angle adjustment device, support plate and support slot realizes the support and stability of the backrest when the leisure chair is reclined, and provides a book board for placing items when the leisure chair is upright, thereby improving the overall functionality and comfort.

[0015] 2. In this utility model, by combining components such as sliding grooves, drawers, and leg support plates installed under the chair, the chair provides support for the legs when reclining and also stores books, sundries, and other items, thereby further enhancing the functionality and comfort of the chair. Attached Figure Description

[0016] Figure 1 This is a front view of the human body-conforming leisure chair backrest structure proposed in this utility model.

[0017] Figure 2 This is a cross-sectional view of the support structure of the leisure chair backrest structure that conforms to the human body curve proposed in this utility model.

[0018] Figure 3 This is a schematic diagram of the angle adjustment component of the leisure chair backrest structure that conforms to the human body curve proposed in this utility model.

[0019] Figure 4 This is an enlarged view of the leg support structure of the human body-conforming leisure chair backrest structure proposed in this utility model.

[0020] Figure 5 This is a diagram showing the unfolded leg support structure of the human body-conforming leisure chair backrest structure proposed in this utility model.

[0021] Legend:

[0022] 1. Chair body; 2. Slide rail; 3. Backrest; 4. Support slot; 5. Adjuster; 6. Motor; 7. Threaded rod; 8. Slider; 9. Fixing block; 10. Slide rod; 11. Spring; 12. Fixing cam; 13. Moving rod; 14. Support rod; 15. Support plate; 16. Fixing groove; 17. Sliding groove; 18. Drawer; 19. Connecting block; 20. Adjusting rod; 21. Leg support plate; 22. Locking block. Detailed Implementation

[0023] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] Reference Figures 1-3 This utility model provides an embodiment of a reclining chair backrest structure that conforms to the curves of the human body, including a chair body 1 and a slide rail 2. A backrest 3 is located at the top of the chair body 1, and a support groove 4 is fixedly connected to the rear end of the backrest 3. A threaded rod 7 is rotatably connected to the inner wall of the slide rail 2, and a slider 8 is threadedly connected to the outer wall of the threaded rod 7. A fixing block 9 is fixedly connected to the inner wall of the slider 8, and a fixing cam 12 is fixedly connected to the inner wall of the slider 8. A slide rod 10 is fixedly connected to the opposite side of the fixing block 9 and the fixing cam 12. A spring 11 is sleeved on the outer wall of the slide rod 10. A movable rod 13 is slidably connected to the outer wall of chair body 1. A support rod 14 is slidably connected to the outer wall of movable rod 13. A support plate 15 is rotatably connected to the top of support rod 14. A leg support assembly is provided at the bottom of chair body 1. The support plate 15 is slidably connected to the inner wall of support slot 4. An adjuster 5 is provided at the bottom of backrest 3. A slider 8 is slidably connected to the inner wall of slide rail 2. The left end of spring 11 is fixedly connected to the surface of fixed block 9. Slide rail 2 is located directly below chair body 1. Four support legs are fixedly connected to the bottom of chair body 1. A handle is provided on the outer wall of adjuster 5.

[0025] Specifically, when the backrest 3 needs to be reclined, first turn the handle on the adjuster 5, then lean against the backrest 3 to adjust its angle. Once adjusted to the appropriate position, release the handle to lock the backrest 3 angle. This is existing technology and will not be elaborated further. After the backrest 3 angle is determined, rotate the threaded rod 7. The threaded connection drives the slider 8 to slide along the outer wall of the threaded rod 7, thereby moving the support component installed at the top of the slider 8. When the slider 8 moves to the appropriate position, squeeze the moving rod 13 to compress the spring 11. Rotate the moving rod 13 to adjust the angle. Then rotate the support plate 15 to the appropriate angle, raise the height of the support rod 14, and insert the support plate 15 into the support slot 4 installed on the back of the backrest 3. The self-locking principle of the threaded rod 7 is used to fix and support the backrest 3. When the chair needs to be upright, after resetting the backrest 3, continue rotating the threaded rod 7 to slide the slider 8 to the front of the chair. Repeatedly adjusting the angles of the moving rod 13 and the support plate 15 transforms the support plate 15 into a bookboard, providing a space for the user to read or work. Through the linkage of the components, users can easily switch the functions of the support parts according to their needs. When reclining, the rear provides stable support; in the upright state, the front can be used as a bookboard to place items, greatly satisfying the needs of different scenarios and making the chair more versatile. There is no need to equip it with an additional bookboard or worry about the chair's stability when reclining, improving overall convenience and comfort.

[0026] Reference Figure 4 and Figure 5 The leg support assembly includes a fixing groove 16, which is fixedly connected to the bottom of the chair body 1. A sliding groove 17 is slidably connected to the inner wall of the chair body 1. A drawer 18 is slidably connected to the inner wall of the sliding groove 17. Multiple connecting blocks 19 are fixedly connected to the lower surface of the sliding groove 17. An adjusting rod 20 is fixedly connected to the opposite side of two connecting blocks 19. A leg support plate 21 is rotatably connected to the outer wall of the adjusting rod 20. Multiple locking blocks 22 are fixedly connected to one end of the leg support plate 21.

[0027] Specifically, when the chair reclines and requires leg support, the sliding groove 17 is pulled out, and the leg support plate 21 at the bottom of the sliding groove 17 rotates out around the adjusting rod 20. The plate is then secured to the outer wall of the slide rail 2 by the locking block 22, providing support and fixation. This allows the user to place their legs on the upper surface of the sliding groove 17 for leg support. Sponge or other components can be installed on the surface of the sliding groove 17 to further enhance comfort. The drawer 18 installed inside the sliding groove 17 can store books, laptops, or other items, which can be taken out when needed for work or reading, increasing the chair's functionality.

[0028] Reference Figure 1 One end of the slide rail 2 is fixedly connected to a motor 6, and the output end of the motor 6 is fixedly connected to one end of the threaded rod 7.

[0029] Specifically, the motor 6 is used to drive the structure and save manpower. In the future, the motor 6 can be remotely started by a remote control signal to optimize the structure and automate the process. The output end of the motor 6 is fixedly connected to drive the rotation of the threaded rod 7, which in turn drives the slider 8 to slide and move the support component.

[0030] Reference Figure 3 A rack is provided on the right side of the bottom end of the moving rod 13, and a rack is provided on the left side of the fixed cam 12. The moving rod 13 and the fixed cam 12 are meshed together.

[0031] Specifically, racks are installed on the surfaces of the moving rod 13 and the wheel fixing cam 12, with the angle difference between each rack set to 5°. This allows for precise control of the rotation angle of the indicating device, demonstrating rigorous and scientific principles. The meshing between the racks ensures the stability of the device after angle adjustment, preventing slippage and rotation, and providing reinforced support.

[0032] Reference Figure 5 The inner wall of the fixed groove 16 is provided with a working groove, and the leg support plate 21 is slidably connected in the working groove. The width of the leg support plate 21 is the same as the width of the slide rail 2.

[0033] Specifically, when leg support is not needed, the leg support plate 21 is hidden in the working groove of the fixed groove 16. When needed, the leg support plate 21 is rotated out. Because the width is the same, the leg support plate 21 can be precisely locked onto the slide rail 2 to support the slide groove 17.

[0034] Working Principle: When using the backrest structure of this lounge chair, to recline, adjust the adjuster 5 to tilt the backrest 3 to the appropriate position, then activate the motor 6 via the remote control or the control button on the side of the chair. The motor 6 drives the slider 8 to move backward along the slide rail 2 to the predetermined position at the rear of the chair. Once the slider 8 reaches the appropriate position, it is fixed due to the self-locking principle of the threaded rod 7. Manually squeeze the moving rod 13 to compress the spring 11 and rotate it to the appropriate angle. Adjust the support rod 14 to the appropriate length, and lock the support plate 15 into the support slot 4, thus providing stable support for the reclining backrest 3 and preventing the chair body 1 from tilting backward. When leg support is needed, pull out the slide groove 17, rotate the leg support plate 21 to lock the block 22 into the slide rail 2 for support, and place the legs on the slide groove 17. When the backrest 3 is upright and the user needs to use the book board function, operate the control button again. The motor 6 reverses, and the slider 8 moves forward along the slide rail 2 to the front of the chair body 1. Once in position, adjust the support rod 14 to the appropriate height, and then adjust the moving rod 13 until the support plate 15 is placed horizontally, which can be used as a book board. Users can then open the drawer 18 to take out books, tablets, and other items.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A leisure chair backrest structure that fits the human body curve, comprising a chair body (1) and a slide rail (2), characterized in that: The chair body (1) has a backrest (3) at its top end. The backrest (3) is fixedly connected to a support slot (4) at its rear end. The inner wall of the slide rail (2) is rotatably connected to a threaded rod (7). The outer wall of the threaded rod (7) is threadedly connected to a slider (8). The inner wall of the slider (8) is fixedly connected to a fixing block (9). The inner wall of the slider (8) is fixedly connected to a fixing cam (12). The opposite side of the fixing block (9) and the fixing cam (12) is fixedly connected to a slide rod (10). The outer wall of the slide rod (10) is fitted with a spring (11). The outer wall of the slide rod (10) is slidably connected to a moving rod (13). The outer wall of the moving rod (13) is slidably connected to a support rod (14). The top end of the support rod (14) is rotatably connected to a support plate (15). The bottom end of the chair body (1) is provided with a leg support assembly.

2. The body curve conforming casual chair back structure according to claim 1, wherein: The leg support assembly includes a fixing groove (16) which is fixedly connected to the bottom end of the chair body (1). The inner wall of the chair body (1) is slidably connected to a sliding groove (17). The inner wall of the sliding groove (17) is slidably connected to a drawer (18). The lower surface of the sliding groove (17) is fixedly connected to multiple connecting blocks (19). An adjusting rod (20) is fixedly connected to one side of two connecting blocks (19). The outer wall of the adjusting rod (20) is rotatably connected to a leg support plate (21). One end of the leg support plate (21) is fixedly connected to multiple locking blocks (22).

3. The body curve conforming casual chair back structure according to claim 1, wherein: One end of the slide rail (2) is fixedly connected to a motor (6), and the output end of the motor (6) is fixedly connected to one end of the threaded rod (7).

4. The reclining chair back structure conforming to the human body curve as described in claim 1, characterized in that: A rack is provided on the right side of the bottom end of the moving rod (13), and a rack is provided on the left side of the fixed cam (12). The moving rod (13) and the fixed cam (12) are meshed together.

5. The body curve conforming casual chair back structure according to claim 1, wherein: The support plate (15) is slidably connected to the inner wall of the support slot (4).

6. The body curve conforming casual chair back structure according to claim 2, wherein: The inner wall of the fixed groove (16) is provided with a working groove, and the leg support plate (21) is slidably connected in the working groove. The width of the leg support plate (21) is the same as the width of the slide rail (2).

7. The body curve conforming casual chair back structure according to claim 1, wherein: An adjuster (5) is provided at the bottom of the backrest (3), the slider (8) is slidably connected to the inner wall of the slide rail (2), and the left end of the spring (11) is fixedly connected to the surface of the fixing block (9).

8. The body curve conforming casual chair back structure according to claim 7, wherein: The slide rail (2) is located directly below the chair body (1), and four support legs are fixedly connected to the bottom of the chair body (1). The outer wall of the adjuster (5) is provided with a handle.

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