A three-waist type waist support structure

Abstract

This invention discloses a three-lumbar support structure, comprising: a support frame and side lumbar supports symmetrically arranged on the front side of the support frame. A middle lumbar support is elastically connected between the two side lumbar supports. Each side lumbar support is connected to its corresponding end of the support frame via a pivot. Each side lumbar support includes a side lumbar support body and a support rod for connecting the side lumbar support body to the pivot. The support rod extends from the inner end towards the pivot. The middle lumbar support has side wings protruding from both sides and covering the inner end of the side lumbar support body. When the middle lumbar support is subjected to a backward pressing force, the side wings transmit the force to the inner end of the side lumbar support body, causing the inner end of the side lumbar support body to twist inward, while the outer end of the side lumbar support body swings outward around the inner end and towards the center of the support frame. This structure fully retains the lumbar support function of a double lumbar support structure, and the middle lumbar support provides support, distributing the force on the waist and resulting in a better user experience.

Description

Technical Field

[0001] This invention relates to the field of lumbar support, and particularly to a three-lumbar support structure. Background Technology

[0002] As people's living standards improve, their demands for the health and comfort of chairs also increase. Traditional chair lumbar supports are a single piece, which can only meet the basic need of supporting the waist. The pressure is concentrated in the center of the waist, which is not comfortable enough. Later, double lumbar supports appeared. Double lumbar supports are more flexible and can achieve the waist-hugging effect that a single lumbar support cannot achieve. However, double lumbar supports also bring problems. The two lumbar supports on both sides of the waist bear the weight of the waist, while the middle is empty and there is no support in the middle. When using the chair, the back is pushed backward by the lumbar support, and the weight of the back is concentrated on both sides of the waist. This may be uncomfortable for heavier users.

[0003] Therefore, we need a lumbar support structure that can retain the waist-hugging function of a double lumbar support while distributing the force on both sides of the waist, bringing users a comprehensive comfort experience. Summary of the Invention

[0004] In order to solve the above-mentioned technical problems, the purpose of this invention is to provide a three-lumbar support structure, which distributes the force on the waist when leaning against the lumbar support by having a lumbar support in the middle of the two lumbar supports, thereby improving the comfort of use.

[0005] The technical solution of this invention is implemented as follows: A three-waisted lumbar support structure, comprising: The system includes a support frame and symmetrically positioned side lumbar supports at the front of the frame. A central lumbar support is elastically connected between the two side lumbar supports. Each side lumbar support is connected to its corresponding end of the support frame via a pivot. Each side lumbar support includes a main body and a support rod connecting it to the pivot. The main body has an inner end near the center of the support frame and an outer end away from the center. The support rod extends from the inner end towards the pivot. The central lumbar support has protruding side wings that cover the inner end of the main body. When the central lumbar support is subjected to a backward pressing force, the side wings transmit the force to the inner end of the main body, causing the inner end to twist inward, while the outer end swings outward around the inner end towards the center of the support frame. This design fully retains the lumbar support function of the double lumbar support structure, and the central lumbar support provides support, distributing the force on the waist and resulting in a better user experience.

[0006] Preferably, the lumbar support and side lumbar supports are connected by a linkage spring. When the lumbar support and side lumbar supports are subjected to a backward squeezing force, the linkage spring deforms and generates a restoring elastic force. When the backward squeezing force decreases or disappears, the lumbar support and side lumbar supports return to their initial positions under the action of the restoring elastic force. It supports the waist during use and automatically adjusts back to its initial state after use, requiring no manual operation and making it convenient to use.

[0007] Preferably, the linkage spring includes a central section and symmetrical extensions formed on both sides of the central section. The extensions include a first extension segment, a second extension segment, and a third extension segment connected in sequence. The first extension segment extends backward from both ends of the central section, the second extension segment extends laterally from the end of the first extension segment away from the central section, and the third extension segment extends forward from the end of the second extension segment. The third extension segment is configured to connect to the inner end of the side waist support body. The two first extension segments and the central section form a U-shape that opens backward, and the first extension segment, the second extension segment, and the third extension segment form an inverted U-shape that opens forward. A first deformation part is formed at the corner where the first extension segment connects to the central section, a second deformation part is formed at the corner where the second extension segment connects to the first extension segment, and a third deformation part is formed at the corner where the third extension segment connects to the second extension segment. When the central waist support and the side waist support are subjected to a backward squeezing force and are linked, the first deformation part, the second deformation part, and the third deformation part all deform to generate a restoring elastic force. When subjected to force, the first, second, and third extension sections deform to adapt to the usage state. After the force is removed, they reset to their original state without manual operation and can also prevent excessive swaying of the side waist support.

[0008] Preferably, the lumbar support includes a back shell and a soft padding body covering the front surface of the back shell. The back shell has a grid area consisting of multiple longitudinal grid holes. The middle section is attached to the front surface of the grid area, and the extension extends out from the corresponding grid holes and protrudes behind the back shell by its own deformation. The middle section being located inside the grid area saves space, and this connection method increases the stress area of ​​the linkage spring, reduces wear and tear during long-term use, and extends service life.

[0009] Preferably, the inner end of the side lumbar support body has a connecting hole on the back, and the third extension is inserted into the connecting hole to be fixedly bonded to the side lumbar support. The connection is completed by inserting it into the connecting hole and bonding it. When a backward force is applied, the linkage spring generates a reset spring force. After the force is removed, the reset spring force drives the side lumbar support back to its initial position.

[0010] Preferably, the linkage spring includes a middle plate and side plates that are symmetrically formed on both sides of the middle section and extend obliquely. The middle plate is connected and fixed to the back of the middle waist support, and the two side plates are respectively fixedly connected to the inner ends of the side waist support bodies on both sides. When the middle waist support is subjected to force and moves backward, the side plates deform and generate a restoring elastic force.

[0011] Preferably, the back of the waist support is recessed with a connecting groove, and the middle plate is located in the connecting groove and fixedly connected to the waist support by locking screws.

[0012] Preferably, the bracket includes a central main support body and support arms extending to both sides from the main support body. At least one spring is provided between each support rod and support arm, with one end of the spring fixedly connected to the support rod and the other end fixedly connected to the support arm. When the spring is subjected to force and deforms, it generates a restoring elastic force that holds the support rod in place, providing support and making it more comfortable to lean against.

[0013] Preferably, the support rod and the side waist support body are integrally formed, with the length of the support rod being shorter than the length of the side waist support body. The support rod, the side waist support body, and the support arm form a lever, which swings under force to achieve a waist-hugging effect.

[0014] Preferably, the side lumbar support body is curved along its length, gradually extending away from the frame from the inner end to the outer end. This adapts to the shape of the human waist, providing better lumbar support and greater comfort.

[0015] Preferably, the maximum rotation range of the support rod is 30°-40°, which provides a better user experience; too large or too small a range will cause discomfort.

[0016] Preferably, the side wing is an arc shape with a longitudinal length longer than the longitudinal length of the inner end of the side waist support, and the side wing covers the front surface of the inner end. When the side wing covers the front surface of the inner end, it causes the inner end to swing when subjected to force. The longitudinal length of the side wing is longer than the longitudinal length of the inner end, so the inner end is not easy to slip off when it swings.

[0017] The principle and beneficial effects of the present invention, which adopts the above technical solution, are as follows: This invention provides a three-lumbar support structure. By adding a middle lumbar support to the double lumbar support structure, the middle lumbar support distributes the pressure on the user's waist during use, thereby improving comfort.

[0018] Specifically, by adding a middle lumbar support between the two lumbar supports, the side lumbar supports sway when the side wings of the middle lumbar support are under force, and the side lumbar supports achieve the effect of lumbar support, while the middle lumbar support provides support in the middle of the waist. In this way, the force on the waist is distributed, and while supporting the waist, it provides a better experience for heavier users. Attached Figure Description

[0019] Figure 1 A three-dimensional view of the rear side of the three-waisted lumbar support structure; Figure 2 A three-dimensional view of the front side of the three-waisted lumbar support structure; Figure 3 A three-dimensional view of the lower side of the three-waisted lumbar support structure; Figure 4Exploded view of the rear side of the three-waisted lumbar support structure; Figure 5 An exploded view of the front side of a three-waisted lumbar support structure; Figure 6 A three-dimensional diagram of the linkage spring of the three-waisted waist support structure; The labels in the attached drawings are as follows: 1-bracket, 2-side waist support, 3-middle waist support, 4-rotating shaft, 5-side waist support body, 6-support rod, 7-inner end, 8-outer end, 9-side wing, 10-linkage spring, 11-middle section, 12-extension, 13-first extension section, 14-second extension section, 15-third extension section, 16-first deformation section, 17-second deformation section, 18-third deformation section, 19-back shell, 20-grid area, 21-grid hole, 22-connection hole, 23-main support body, 24-support arm, 25-spring, 26-buckle. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention 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.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0022] The specific embodiments of the present invention are as follows: like Figure 1-6 As shown, the present invention first provides a three-waisted lumbar support structure, including a bracket 1 and side lumbar supports 2 symmetrically arranged on the front side of the bracket 1. A middle lumbar support 3 is elastically connected between the two side lumbar supports 2. Each end of the bracket 1 is connected to the corresponding side lumbar support 2 via a pivot 4. The side lumbar support 2 includes a side lumbar support body 5 and a support rod 6. The support rod 6 connects the side lumbar support body 5 to the pivot 4. The side lumbar support body 5 is divided into an inner end 7 and an outer end 8. The inner end 7 is close to the middle of the bracket 1, and the outer end 8 is away from the middle of the bracket 1. The support rod 6 is composed of... The inner end 7 extends toward the pivot 4. The middle lumbar support 3 has side wings 9 protruding on both sides and covering the inner end 7 of the side lumbar support body 5. When the user applies a backward pressing force to the middle lumbar support 3, the side wings 9 cover the inner end 7 of the side lumbar support body 5 and press backward, causing the inner end 7 of the side lumbar support body 5 to twist inward, while the outer end 8 of the side lumbar support body 5 swings outward around the inner end 7 and toward the middle of the bracket 1, achieving the effect of wrapping the waist. Moreover, the area of ​​force on the waist is not only the two side lumbar supports 2, but also the middle lumbar support 3 will support the waist.

[0023] The above describes the general composition of this three-waisted lumbar support structure. The following sections will provide a detailed description of each part: Specifically, such as Figure 3 As shown, the middle lumbar support 3 and the side lumbar support 2 are connected by a linkage spring 10. When the middle lumbar support 3 is subjected to a backward squeezing force and is linked with the side lumbar support 2, the linkage spring 10 is deformed by the force and generates an elastic force to reset the side lumbar support 2. When the backward squeezing force decreases or disappears, the reset elastic force drives the linkage spring 10 to restore its original shape, and the middle lumbar support 3 and the side lumbar support 2 are also reset to their initial positions under the action of the reset elastic force.

[0024] Furthermore, such as Figure 6 As shown, the linkage spring 10 includes a central section 11 and extensions 12 symmetrically formed on both sides of the central section 11. The central section 11 and the extensions 12 are integrally made of soft rubber or plastic. The extensions 12 include a first extension segment 13, a second extension segment 14, and a third extension segment 15 connected in sequence. The first extension segment 13 extends rearward from both ends of the central section 11. The second extension segment 14 extends laterally from the end of the first extension segment 13 away from the central section 11. The third extension segment 15 extends forward from the end of the second extension segment 14. The third extension segment 15 is configured to connect to the inner end 7 of the side waist support body 5. The two first extension segments 13 and the central section 11 form a U-shape extending rearward. The extension segment 14 and the third extension segment 15 form an inverted U-shape with the opening facing forward; the first deformation part 16 is formed at the corner where the first extension segment 13 connects to the middle segment 11, the second deformation part 17 is formed at the corner where the second extension segment 14 connects to the first extension segment 13, and the third deformation part 18 is formed at the corner where the third extension segment 15 connects to the second extension segment 14. When the middle waist support 3 and the side waist support 2 are subjected to a backward squeezing force, the first deformation part 16, the second deformation part 17 and the third deformation part 18 all deform to generate a restoring elastic force. The side waist support 2 will not swing excessively while twisting under the action of the linkage spring 10. After the force is removed, the first deformation part 16, the second deformation part 17 and the third deformation part 18 will all return to their initial shape under the action of the restoring elastic force.

[0025] The thickness of the first extension section 13 is less than that of the second extension section 14, and the thickness of the first extension section 13 is less than that of the middle section 11. This ensures the connection strength between the middle section 11 and the middle waist support, while also ensuring the connection strength between the second extension section 14 and the side waist support 2. At the same time, it makes the first deformation section 16 and the second deformation section 17 more prone to deformation.

[0026] Furthermore, such as Figure 2-4As shown, the lumbar support 3 includes a back shell 19 and a soft pad covering the front surface of the back shell 19, which is more comfortable when leaning against it. The back shell 19 has a grid area 20 consisting of four longitudinal grid holes 21. The middle section 11 is attached to the front surface of the grid area 20. The extension 12 extends from the inside and outside of the corresponding grid holes 21 and protrudes from the back shell 19 through its own deformation. The first extension section 13 connects the inside and outside of the grid holes 21. A longitudinal elongated connecting hole 22 is provided on the back of the inner end 7 of the side lumbar support body 5. The end of the third extension section 15 forms a buckle 26. The buckle 26 is inserted into the connecting hole 22 and fixedly connected to the side lumbar support 2.

[0027] Furthermore, such as Figure 4 As shown, the bracket 1 includes a main support body 23 in the middle and support arms 24 extending from the main support body 23 to both sides. The ends of the support arms 24 are connected to the ends of the support rods 6 through a pivot 4. A spring 25 is provided between each support rod 6 and the support arm 24. One end of the spring 25 is glued and fixed to the support rod 6, and the other end of the spring 25 is glued and fixed to the support arm 24. When the lumbar support is subjected to a backward force, the support rod 6 compresses the spring 25 and deforms. After deformation, it provides a forward support force to support the waist and bring a better experience to the user.

[0028] like Figure 3-4 As shown, the support rod 6 and the side waist support body 5 are integrally formed. The length of the support rod 6 is shorter than the length of the side waist support body 5. The bracket 1, the support arm 24 and the side waist support body 5 form a Z-shaped structure. When the inner end 7 of the side waist support body 5 is subjected to a backward squeezing force, the side waist support body 5 rotates inward around the pivot 4, while the outer end 8 of the side waist support body swings outward around the inner end 7 and toward the middle of the bracket 1. The waist-hugging effect is achieved through the lever principle. The side waist support body 5 is arc-shaped along its length, gradually extending away from the bracket 1 from the inner end 7 to the outer end 8, adapting to the shape of the human waist and achieving the waist-hugging effect.

[0029] The maximum rotation range of the support rod is 30°. The shape of the side wing is an arc with a longitudinal length longer than the longitudinal length of the inner end of the side waist support. The side wing covers the front surface of the inner end. When the user leans back, the side wing is subjected to a backward force, which is transmitted to the front surface of the inner end. The inner end moves backward to achieve the side waist support to swing and wrap around the waist.

[0030] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A three-waisted lumbar support structure, characterized in that: include: The bracket includes a support frame and symmetrically arranged side lumbar supports at the front of the support frame. A central lumbar support is elastically connected between the two side lumbar supports. Each side lumbar support is connected to its corresponding end of the support frame via a pivot. Each side lumbar support includes a body and a support rod for connecting the body to the pivot. The body has an inner end near the center of the support frame and an outer end away from the center. The support rod extends from the inner end towards the pivot. The support rod is integrally formed with the body and its length is shorter than the body. The support frame includes a central main support and support arms extending from the main support to both sides. Each support rod and support arm... At least one spring is provided between the two sides, with one end of the spring fixedly connected to the support rod and the other end of the spring fixedly connected to the support arm. The middle waist support has side wings protruding on both sides and covering the inner end of the side waist support body. The middle waist support and the side waist support are connected by a linkage spring. When the middle waist support is subjected to a backward squeezing force, the side wings transmit the force to the inner end of the side waist support body, causing the inner end of the side waist support body to twist inward. The linkage spring deforms and generates a reset spring force, while the outer end of the side waist support body swings outward around the inner end and toward the middle of the support. When the backward squeezing force decreases or disappears, the middle waist support and the side waist support return to their initial positions under the action of the reset spring force.

2. The three-waisted lumbar support structure according to claim 1, characterized in that: The linkage spring includes a central section and symmetrical extensions formed on both sides of the central section. The extensions include a first extension segment, a second extension segment, and a third extension segment connected in sequence. The first extension segment extends backward from both ends of the central section. The second extension segment extends laterally from the end of the first extension segment away from the central section. The third extension segment extends forward from the end of the second extension segment. The third extension segment is configured to connect to the inner end of the side waist support body. The two first extension segments and the central section form a U-shape that opens backward. The first extension segment, the second extension segment, and the third extension segment form an inverted U-shape that opens forward. A first deformation part is formed at the corner where the first extension segment connects to the central section. A second deformation part is formed at the corner where the second extension segment connects to the first extension segment. A third deformation part is formed at the corner where the third extension segment connects to the second extension segment. When the central waist support and the side waist support are subjected to a backward squeezing force and are linked, the first deformation part, the second deformation part, and the third deformation part all deform to generate a restoring elastic force.

3. The three-waisted lumbar support structure according to claim 2, characterized in that: The mid-waist support includes a back shell and a soft padding body covering the front surface of the back shell. The back shell has a grid area consisting of multiple longitudinal grid holes. The middle section is attached to the front surface of the grid area, and the extension section extends out from the corresponding grid holes and protrudes behind the back shell by its own deformation.

4. The three-waisted lumbar support structure according to claim 2, characterized in that: The inner end of the side waist support body has a connecting hole, and the third extension section is inserted into the connecting hole and fixedly connected to the side waist support.

5. The three-waisted lumbar support structure according to claim 1, characterized in that: The side lumbar support body is arc-shaped along its length, gradually extending away from the support from the inner end to the outer end.

6. The three-waisted lumbar support structure according to claim 1, characterized in that: The maximum rotation range of the support rod is 30°-40°.

7. A three-waisted lumbar support structure according to claim 1, characterized in that: The side wing is an arc shape with a longitudinal length longer than the longitudinal length of the inner end of the side waist support, and the side wing covers the front surface of the inner end.

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