Movable waist supporting device

Abstract

The utility model discloses a movable waist supporting device which comprises a support, a middle bearing piece and side bearing pieces on the two sides. The two side bearing pieces are rotationally connected to the left end and the right end of the support respectively, and the two ends of the middle bearing piece are rotationally connected with the side bearing pieces as well. The support has elasticity, and when the middle bearing piece moves close to the support under the backward acting force of the waist of the human body, the two ends of the support can be folded inwards to deform due to stress; due to the fact that the side bearing pieces are rotationally connected with the support and the middle bearing piece in a linkage mode, the side bearing pieces can be folded inwards and rotate relative to the middle bearing piece at the moment, the included angle between the side bearing pieces and the included angle between the side bearing pieces and the middle bearing piece are decreased, and self-adaption waist clamping action, comprehensive fitting of the waist and effective waist protection are achieved. When the waist does not apply pressure any more, the support elastically recovers deformation, and the positions of the side bearing pieces and the middle bearing piece are driven to recover; the device is ingenious in structure, the problems that a traditional supporting device cannot adapt to the dynamic state of the waist and is poor in fitting degree are solved, and more comfortable and effective waist supporting experience is provided.

Description

Technical Field

[0001] This utility model relates to the field of furniture, and in particular to a movable lumbar support device. Background Technology

[0002] As people become more health-conscious, they have higher requirements for the comfort, adaptability, and convenience of lumbar support products. Currently, there are many aspects of the products on the market that need improvement, making it difficult to fully meet users' needs for a comfortable lumbar support experience.

[0003] Traditional lumbar supports are mostly simple in structure and offer only one type of support. Common lumbar supports are often just a fixed-shape cushion, unable to adapt to the dynamic changes in the lower back. When the body's posture changes, such as frequently shifting positions while working or relaxing and leaning back during rest, these types of lumbar supports cannot effectively conform to the lumbar curve and cannot provide continuous and stable support, leading to lower back fatigue and failing to achieve the desired lumbar protection effect.

[0004] Some adjustable lumbar supports often have complex adjustment mechanisms. Users may need to manually perform multiple steps, such as adjusting various knobs or buttons to change the angle and position of the lumbar support, which is extremely inconvenient. In real-world use cases, users often want quick and easy access to comfortable lumbar support; complex adjustment processes reduce user willingness to use the product and affect its practicality. Summary of the Invention

[0005] To address the aforementioned technical problems, this utility model provides a movable lumbar support device, including a support frame, a central support member, and two side support members. The two side support members are rotatably connected to the left and right ends of the support frame, respectively, and the two ends of the central support member are also rotatably connected to the side support members. The support frame is elastic; when the central support member moves closer to the support frame under the backward force of the user's waist, the two ends of the support frame will deform inward due to the force. Since the side support members are rotatably connected and linked with the support frame and the central support member, the side support members will rotate inward relative to the central support member, reducing the angle between the side support members and between the side support members and the central support member, achieving adaptive waist support movement, fully conforming to the waist, and effectively protecting the lower back. When the pressure on the waist is removed, the support frame elastically recovers its deformation, causing the side support members and the central support member to return to their original positions. This device has an ingenious structure, solving the problems of traditional support devices being unable to adapt to waist dynamics and having poor conformity, providing users with a more comfortable and effective lumbar support experience.

[0006] The technical solution of this utility model is implemented as follows:

[0007] A movable waist support device includes a bracket, a central support member, and two side support members located on both sides of the central support member. The two side support members are rotatably connected to the left and right ends of the bracket, and the left and right ends of the central support member are rotatably connected to the two side support members. The bracket is elastic. When the central support member is subjected to force and moves towards the bracket, the two ends of the bracket deform inward, causing the two side support members to rotate inward relative to the central support member.

[0008] When the support is elastic, the central support is floating relative to the support. The central support is connected to the support through the side supports. Since the side supports are rotatably connected to the support and rotatably connected to the central support, the central support will move relative to the support when subjected to force. When the waist leans back on the central support, the central support is pushed backward and moves closer to the support. At the same time, the central support pulls the two side supports backward. At this time, the two ends of the support adapt to the side supports and deform inward, causing the two side supports to rotate inward. The angle between the two side supports and between the side supports and the central support are reduced. The two side supports exhibit a movement of embracing both sides of the waist, thereby realizing the adaptive waist-clamping movement of the two side supports. The waist clamping allows the entire lumbar support to fit more fully against the waist and hug the waist to achieve the effect of waist protection. When the central support is no longer under stress, the bracket will restore its deformation and restore the relative positions of the side supports and the central support to their original positions.

[0009] Preferably, the support has two symmetrical arms, each with a backward-bending arc; the front end of the arm is rotatably connected to the middle of the side support. The backward-bending arc of the arm facilitates deformation; from a top or bottom view, the support is roughly W-shaped.

[0010] Preferably, a deformable portion is formed near the end of the support arm close to the side support member, and the thickness of the deformable portion is less than the thickness of other parts of the support arm. The thickness of the deformable portion is reduced in both the front-to-back and vertical directions, which facilitates deformation.

[0011] Preferably, the thickness of the arm in the longitudinal direction is less than its thickness in the vertical direction. This dimension facilitates inward deformation.

[0012] Preferably, the bracket also includes a mounting part for connecting the chair back, and both support arms are connected to the mounting part; the mounting part is integrally formed with the two support arms.

[0013] Preferably, the side supports include an inner end near the central support and an outer end away from the central support. In the left-right direction, there is a gap between the inner end of the side support and the end of the central support. In the left-right direction, the two side supports are located on either side of the central support, and the three together form a curved contact surface. When the central support is under force and moves closer to the support frame, the curvature of the contact surface increases. The central support and the two side supports are independently distributed in a curved shape but are interconnected, making the lumbar support a three-part adaptive lumbar support. The increased curvature of the contact surface reflects the inward rotation and embracing characteristic of the side supports, providing a more comfortable fit and support.

[0014] Preferably, in the left-right direction, the length of the central support is at least the sum of the lengths of the two side supports. The central support is the main part that supports the waist, while the side supports are used to assist in embracing the waist to improve comfort and support.

[0015] Preferably, the side support has a rotating part in the middle and a rotating seat at the end of the support arm, and the rotating part and the rotating seat are rotatably connected by a rotating shaft.

[0016] Preferably, the rotating part is further provided with a first limiting part and a second limiting part on both sides of the rotating base. The first limiting part and the second limiting part are configured to limit the rotation stroke of the side support member. This achieves movement limitation of the middle support member and the side support member, preventing excessive movement and damage to the structure.

[0017] Preferably, the side support member has a moving part at the end near the middle support member, and the middle support member has a seat at the end near the side support member. The moving part and the seat are rotatably connected by a pivot.

[0018] The design starting point, concept, and beneficial effects of this utility model, which adopts the above technical solution, are as follows:

[0019] When the support is elastic, the central support is floating relative to the support. The central support is connected to the support through the side supports. Since the side supports are rotatably connected to the support and rotatably connected to the central support, the central support will move relative to the support when subjected to force. When the waist leans back on the central support, the central support is pushed backward and moves closer to the support. At the same time, the central support pulls the two side supports backward. At this time, the two ends of the support adapt to the side supports and deform inward, causing the two side supports to rotate inward. The angle between the two side supports and between the side supports and the central support are reduced. The two side supports exhibit a movement of embracing both sides of the waist, thereby realizing the adaptive waist-clamping movement of the two side supports. The waist clamping allows the entire lumbar support to fit more fully against the waist and hug the waist to achieve the effect of waist protection. When the central support is no longer under stress, the bracket will restore its deformation and restore the relative positions of the side supports and the central support to their original positions. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the movable lumbar support device in the seat in an embodiment of the present invention;

[0021] Figure 2 This is a three-dimensional structural diagram of the movable waist support device in an embodiment of the present invention when it is not under stress. Figure 1 ;

[0022] Figure 3 This is a three-dimensional structural diagram of the movable waist support device in an embodiment of the present invention when it is not under stress. Figure 2 ;

[0023] Figure 4 This is a three-dimensional structural diagram of the movable waist support device in an embodiment of the present invention when it is not under stress. Figure 3 ;

[0024] Figure 5 This is a top view of the movable waist support device under stress and deformation in an embodiment of the present invention;

[0025] Figure 6 This is a three-dimensional structural diagram of the bracket in the embodiments of this utility model;

[0026] Figure 7 This is an exploded view of the movable waist support device in an embodiment of the present invention.

[0027] The reference numerals in the attached drawings are as follows: bracket 1; support arm 11; deformable part 111; mounting part 12; middle support 2; side support 3; inner end 31; outer end 32; rotating part 4; first limiting part 41; second limiting part 42; rotating seat 6; rotating space 61; rotating shaft 7; moving part 8; seat 9; moving space 91. Detailed Implementation

[0028] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0030] In the description of this utility model, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] The specific embodiments of this utility model are as follows:

[0032] like Figure 2-5 As shown, this utility model provides a movable waist support device, including a bracket 1, a central support member 2, and two side support members 3 located on both sides of the central support member 2. The two side support members 3 are rotatably connected to the left and right ends of the bracket 1, and the left and right ends of the central support member 2 are rotatably connected to the two side support members 3. The bracket 1 is elastic. When the central support member 2 is subjected to force and moves towards the bracket 1, the two ends of the bracket 1 deform inward, causing the two side support members 3 to rotate inward relative to the central support member 2.

[0033] When the support 1 is elastic, the central support 2 is in a floating state relative to the support 1. The central support 2 is connected to the support 1 through the side support 3. Since the side support 3 is rotatably connected to the support 1 and rotatably connected to the central support 2, the central support 2 will move relative to the support 1 when subjected to force. When the waist of the human body leans back against the central support 2, the central support 2 is pushed backward and moves closer to the support 1. At the same time, the central support 2 moves backward. Pulling the two side support members 3 causes the two ends of the bracket 1 to deform inward in response to the side support members 3, resulting in the two side support members 3 rotating inward. The angles between the two side support members 3 and between the side support members 3 and the central support member 2 decrease, causing the two side support members 3 to wrap around the sides of the waist. This achieves an adaptive waist-clamping movement, allowing the entire lumbar support to fit more comprehensively against the waist, providing a waist-protecting effect. When the central support member 2 is no longer under pressure, the bracket 1 will return to its original deformation, and the relative positions of the side support members 3 and the central support member 2 will return to their original positions.

[0034] like Figure 1 , 4 As shown in Figure 5, the lumbar support is used in a seat and is part of the backrest of the seat. The side support 3 and the middle support 2 are both plate parts. The side support 3 includes an inner end 31 near the middle support 2 and an outer end 32 away from the middle support 2. In the left-right direction, there is a gap between the inner end 31 of the side support 3 and the end of the middle support 2. In the left-right direction, the two side support 3 are located on both sides of the middle support 2, and the three together form a curved contact surface. When the middle support 2 is subjected to force and moves closer to the bracket 1, the curvature of the contact surface increases. The middle support 2 and the two side support 3 are independently distributed in an arc shape but are linked to each other, so that the lumbar support forms a three-part adaptive waist support. The increase in the curvature of the contact surface reflects the characteristic of the side support 3 rotating inward to hug the waist, so as to provide a more comfortable fit and support. In the left-right direction, the length of the central support 2 is at least the sum of the lengths of the two side support 3. The central support 2 is the main part that supports the waist, and the side support 3 is used to assist in hugging the waist to improve comfort and support.

[0035] like Figure 7As shown, the side support member 3 has a rotating part 4 in the middle, and the end of the support arm 11 has a rotating seat 6. The rotating seat 6 has a rotating space 61 in the middle, and the rotating part 4 is disposed in the rotating space 61. The rotating part 4 and the rotating seat 6 are rotatably connected by a rotating shaft 7. The side support member 3 has a moving part 8 near the end of the middle support member 2, and the middle support member 2 has a seat 9 near the end of the side support member 3. The seat 9 has a moving space 91 in the middle, and the moving part 8 is disposed in the moving space 91. The moving part 8 and the seat 9 are rotatably connected by a rotating shaft 7.

[0036] like Figure 4-6 As shown, the support 1 is made of elastic material and has two arms 11, one on the left and one on the right. Each arm 11 has a backward-bending arc. The front end of the arm 11 is rotatably connected to the middle of the side support 3. The support 1 also includes a mounting part 12 for connecting the chair back. Both arms 11 are connected to the mounting part 12. The mounting part 12 is integrally formed with the two arms 11. From a top or bottom view, the support 1 is roughly W-shaped. A deformable part 111 is formed near the end of the arm 11 close to the side support 3. The thickness of the deformable part 111 is less than the thickness of other parts of the arm 11. The thickness of the deformable part 111 is reduced in both the front-back and vertical directions, which is conducive to deformation. The thickness of the arm 11 in the front-back direction is less than its thickness in the vertical direction. This size setting is conducive to inward deformation.

[0037] The rotating part 4 is provided with a first limiting part 41 and a second limiting part 42 on both sides of the rotating seat 6. When the waist of the human body is not leaning against the middle support 2, the first limiting part 41 abuts against the rotating seat 6. When the waist of the human body is leaning against the middle support 2 and the middle support 2 and the side support 3 move, the second limiting part 42 abuts against the rotating seat 6, thereby realizing the movement limitation of the middle support 2 and the side support 3 and preventing excessive movement from damaging the structure.

Claims

1. A movable lumbar support device, characterized by: The support includes a support frame, a middle supporting piece and two side supporting pieces located on both sides of the middle supporting piece, the two side supporting pieces are rotationally connected to the left and right ends of the support frame, and the left and right ends of the middle supporting piece are rotationally connected to the two side supporting pieces; the support frame is elastic, when the middle supporting piece moves towards the support frame under force, the two ends of the support frame are inwardly folded and deformed, so that the two side supporting pieces are inwardly folded relative to the middle supporting piece.

2. The movable lumbar support device according to claim 1, characterized in that: The support frame has two symmetrical support arms, and the support arms are both curved backwards; the front ends of the support arms are rotationally connected to the middle part of the side supporting pieces.

3. The movable lumbar support device according to claim 2, characterized in that: The support arms are formed with deformation parts near the ends close to the side supporting pieces, and the thickness of the deformation parts is smaller than that of other positions of the support arms.

4. The movable lumbar support device of claim 2, wherein: The thickness of the support arms in the front-rear direction is smaller than that in the up-down direction.

5. The movable lumbar support device of claim 2, wherein: The support frame further includes a mounting part for connecting a chair back, and the two support arms are connected to the mounting part; the mounting part is integrally formed with the two support arms.

6. The movable lumbar support device of claim 1, wherein: The side supporting pieces include inner ends close to the middle supporting piece and outer ends away from the middle supporting piece, and in the left-right direction, the inner ends of the side supporting pieces have a gap with the ends of the middle supporting piece; in the left-right direction, the two side supporting pieces are located on both sides of the middle supporting piece, and the three together form a fitting surface with a curvature; when the middle supporting piece moves close to the support frame under force, the curvature of the fitting surface increases.

7. The movable lumbar support device of claim 6, wherein: In the left-right direction, the length of the middle supporting piece is at least the sum of the lengths of the two side supporting pieces.

8. The movable lumbar support device of claim 1, wherein: The middle part of the side supporting piece is provided with a rotating part, and the end of the support arm is provided with a rotating seat, and the rotating part and the rotating seat are rotationally connected through a rotating shaft.

9. The movable lumbar support device of claim 8, wherein: The rotating part and the rotating seat are further respectively provided with a first limiting part and a second limiting part on both sides, and the first limiting part and the second limiting part are configured to limit the rotating stroke of the side supporting piece.

10. The movable lumbar support device of claim 1, wherein: The end of the side supporting piece close to the middle supporting piece is provided with a moving part, and the end of the middle supporting piece close to the side supporting piece is provided with a seat part, and the moving part and the seat part are rotationally connected through a rotating shaft.

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