Elastic lumbar support assembly and seat

Abstract

The utility model discloses a kind of elastic waist rest subassembly and seat, including waist rest subassembly, waist rest subassembly includes support frame and two waist rests being arranged on support frame left and right symmetrically, every waist rest is connected with support frame by swing connection structure, and can swing forwards and backwards;Elastic guide structure is set between waist rest and support frame, and elastic guide structure includes auxiliary elastic member being set on support frame, guide groove being set on every waist rest correspondingly, auxiliary elastic member includes elastic guide portion being slidably connected in corresponding guide groove, to form guide to the waist rest swinging forwards and backwards, the synchronism and stability when two waist rests swing forwards and backwards are improved, the elastic waist rest subassembly is set on seat, when waist portion leans back, two waist rests can form stable hug waist support effect to waist portion, improve the use experience of seat.

Description

Technical Field

[0001] This utility model relates to the field of seating, and in particular to an elastic lumbar support component and a seat. Background Technology

[0002] In most office chairs or ergonomic chairs, a lumbar support is usually provided on the backrest to support the lower back. Some lumbar support components are double lumbar support structures, which include a frame and two symmetrically arranged lumbar supports, each of which can swing back and forth relative to the frame; for example... Figure 10a As shown, in the double lumbar support structure of some seats, an elastic element 7 is provided between each lumbar support 2 and the bracket 1. The elastic element 7 is usually a spring or rubber block with one end fixed to the lumbar support 2 and the other end fixed to the bracket 1. When the waist leans back, the elastic element 7 deforms, the two lumbar supports 2 rotate backward and form a waist-hugging support effect on both sides of the waist. When the waist leaves the lumbar support 2, the elastic element 7 resets and the lumbar support 2 returns to its initial position.

[0003] like Figure 10b As shown, in another type of double lumbar support structure of the seat, the lumbar support 2 and the bracket 1 are rotatably connected by a vertical rotating support shaft 8, and a torsion spring (not shown) is sleeved on the rotating support shaft 8, so that the two elastic arms of the torsion spring act on the bracket 1 and the lumbar support 2 respectively; when the waist leans back, the torsion spring deforms, and the two lumbar supports 2 rotate backward to form a waist-hugging support effect. When the waist leaves the lumbar support 2, the torsion spring returns to its original position, and the lumbar support 2 returns to its initial position; however, the above-mentioned double lumbar support structures all have shortcomings.

[0004] The lumbar support and the frame form only a single connection point. Therefore, the lumbar support is prone to swaying randomly after being subjected to force. As a result, it will wobble when supporting the waist, which will affect the waist support effect of the two lumbar supports.

[0005] When actually sitting down and leaning back, the lumbar support is difficult to align with the middle position of the two lumbar supports, resulting in different rotation angles of the two lumbar supports after being subjected to force. This leads to poor synchronization of the rotation of the two lumbar supports, resulting in inconsistent support for both sides of the waist and affecting the user experience of the chair. Summary of the Invention

[0006] This utility model provides an elastic lumbar support component and a seat. By setting an elastic guide structure between the lumbar support and the support frame, the lumbar support swings back and forth, which improves the synchronicity and stability of the two lumbar supports when swinging back and forth. When the waist leans back, the two lumbar supports can form a stable waist support effect, which enhances the user experience of the seat.

[0007] The technical solution of this utility model is implemented as follows: A resilient lumbar support assembly includes: The lumbar support assembly includes a support frame and two lumbar supports symmetrically arranged on the support frame. Each lumbar support is connected to the support frame through a swing connection structure and can swing back and forth. An elastic guide structure is provided between each lumbar support and the support frame and spaced to the left and right of the swing connection structure; the elastic guide structure includes an auxiliary elastic element provided on the support frame and a guide groove provided on each lumbar support, the auxiliary elastic element including an elastic guide part slidably connected in the corresponding guide groove. When the two lumbar supports are subjected to a backward leaning force, the two elastic guide parts undergo elastic deformation and slide in the corresponding guide grooves to guide the two lumbar supports to swing backward synchronously.

[0008] Preferably, the lumbar support includes a lumbar support body and a guide seat disposed on the lumbar support body. The guide seat is provided with a guide groove running through it in the left-right direction. The elastic guide part is an elastic sheet-like body that slides through the guide groove. This facilitates the smooth deformation and sliding of the elastic guide part when the lumbar support swings backward.

[0009] Preferably, an elastic support portion fixed on the support frame is provided between the two elastic guide portions. The elastic support portion is integrally formed with the two elastic guide portions. When the two elastic guide portions elastically deform and slide in the corresponding guide grooves, the elastic support portion elastically deforms and forms elastic support for the lumbar support. This provides better elastic support for the lumbar region, and the integral design also facilitates the enhancement of the synchronization of the two elastic guide portions.

[0010] Preferably, the elastic support is an elastic ring fixed on the support frame and integrally formed with the two elastic guides; the elastic ring has a simple structure, is lightweight, and is more likely to deform under external force.

[0011] Preferably, the auxiliary elastic component also includes an elastic support portion fixed on the support frame. Each elastic support portion is integrally formed with a corresponding elastic guide portion. When the two elastic guide portions elastically deform and slide in the corresponding guide groove, the corresponding elastic support portion elastically deforms and forms elastic support for the lumbar support.

[0012] Preferably, the elastic support is an elastic sheet extending in a wave-like or arc-shaped trajectory, so that the elastic support can more easily undergo elastic deformation when subjected to external force.

[0013] Preferably, the swing connection structure includes an elastic connector, with both ends of the elastic connector fixed to the support frame and the lumbar support respectively; when the swing seat swings back and forth, the elastic connector generates elastic deformation and provides a restoring force to the lumbar support.

[0014] Preferably, the swing connection structure includes a fixed seat and a swing seat respectively disposed on the support frame and the waist rest. The swing seat and the fixed seat are rotatably connected by a vertically extending pivot. A reset elastic element is also provided between the swing seat and the fixed seat, which forces the swing seat to always have a tendency to rotate to the initial position.

[0015] Preferably, the fixed base has a vertically extending central hole, and the rotating shaft is fixedly connected to the swing seat and passes through the central hole; the fixed base has a guide slope at one end facing the swing seat, and the swing seat has a corresponding mating slope that fits against the guide slope; the rotating shaft has a first annular boss, and the central hole has a corresponding second annular boss; the reset elastic element is a compression spring sleeved on the rotating shaft, with both ends of the compression spring abutting against the first annular boss and the second annular boss respectively; when the swing seat swings back and forth, the mating slope slides relative to the guide slope and causes the rotating shaft to move up and down, and causes the compression spring to deform or reset; the slope design converts the elastic force generated by the axial deformation of the compression spring into a circumferential elastic force, while the elastic reset element is hidden in the central hole.

[0016] A seat including the aforementioned elastic lumbar support assembly.

[0017] The beneficial effects of this utility model, which adopts the above technical solution, are as follows: This invention incorporates an elastic guide structure between the lumbar support and the support frame, which improves the stability and synchronicity of the lumbar support during its swing. When the lumbar support is not subjected to a backward leaning force, the elastic guide structure can limit the lumbar support's swaying. When the waist leans back against the lumbar support, the elastic guide structure is triggered and guides the lumbar support as it swings back and forth, causing it to rotate stably backward without deflecting, thus enhancing the lumbar support's lumbar support effect and the user experience of the seat.

[0018] An elastic support portion, which is fixed to the support frame and extends in a ring shape, is integrally formed between the two elastic guide portions. The elastic support portion allows the deformation and sliding of the two elastic guide portions to be more synchronized, thereby improving the synchronicity of the backward swing of the two lumbar supports. At the same time, after the two elastic guide portions have deformed to their maximum extent, as the waist leans further back against the lumbar support, the elastic support portion can continue to bear the backward force of the waist and continue to deform, ensuring that the lumbar support always provides a stable elastic support to the waist, thereby improving the comfort of the lumbar support. Attached Figure Description

[0019] Figure 1 A schematic diagram of the elastic guide structure on the elastic lumbar support assembly; Figure 2 Top view of the elastic lumbar support assembly; Figure 3 This is a simplified structural diagram of an elastic lumbar support assembly. Figure 4A simplified diagram illustrating the further deformation of the elastic support after the elastic guide has deformed to its maximum extent. Figure 5 A simplified schematic diagram showing that one end of the elastic guide is fixed to the support frame and the other end is inserted into the guide groove; Figure 6 This is an exploded view of the swing connection structure; Figure 7 This is a cross-sectional view of the pivot point in the swing connection structure. Figure 8 This is a schematic diagram showing that the elastic support part is arc-shaped; Figure 9 This is a schematic diagram showing the elastic support section as a waveform. Figures 10a-10b The background section presents a simplified structural diagram of an existing double waist support mechanism. The reference numerals in the attached drawings are as follows: 1-support frame, 11-support arm, 12-fixed seat, 13-guide ramp, 14-second annular boss, 15-center hole, 2-lumbar support, 21-guide seat, 22-swing seat, 23-fitting ramp, 3-elastic support part, 31-elastic guide part, 32-mounting seat, 4-rotating shaft, 41-first annular boss, 42-screw hole, 5-elastic reset part, 6-screw, 7-elastic part, 8-rotating support shaft. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] The specific embodiments of this utility model are as follows: Example 1: As Figure 1-7 As shown, to address the problem that in existing dual lumbar support structures, the two lumbar supports tend to sway randomly and have poor synchronization, this embodiment provides an elastic lumbar support assembly. This elastic lumbar support assembly is typically used in seats and includes: The lumbar support assembly includes a support frame 1 and two lumbar supports 2 symmetrically arranged on the support frame 1. Each lumbar support 2 is connected to the support frame 1 through a swing connection structure and can swing back and forth. Specifically, the support frame 1 includes a base and two support arms 11 symmetrically arranged on the base. The swing connection structure is set between the corresponding support arm 11 and the lumbar support 2. An elastic guide structure is provided between each lumbar support 2 and the support frame 1 and is spaced left and right apart from the swing connection structure, so that each lumbar support 2 and the support frame 1 form two connection points spaced left and right apart; wherein the elastic guide structure includes an auxiliary elastic element provided on the support frame 1 and a guide groove provided on each lumbar support 2, and the auxiliary elastic element includes an elastic guide part 31 that is slidably connected in the corresponding guide groove. When the two lumbar supports 2 are not subjected to a backward leaning force, the corresponding elastic guide structure prevents the two lumbar supports 2 from easily wobbling; when the two lumbar supports 2 are subjected to a backward leaning force, the two elastic guide parts 31 undergo elastic deformation and slide in the corresponding guide groove to guide the two lumbar supports 2 to swing backward synchronously, avoiding any one of the two lumbar supports 2 from swaying, so that the two lumbar supports 2 form a stable and comfortable waist support for the left and right sides of the waist.

[0023] Furthermore, the guide groove can extend in a vertical or horizontal direction, allowing the elastic guide portion to be inserted into the guide groove in either a vertical or horizontal direction. However, to better accommodate and adapt to the swing trajectory of the lumbar support 2, the guide groove in this embodiment preferably extends in a horizontal direction. Specifically, for example... Figure 1-3 As shown, the lumbar support 2 includes a lumbar support body and a guide seat 21 disposed on the lumbar support body. The guide seat 21 is provided with a guide groove running through it in the left and right direction. The elastic guide part 31 is an elastic sheet that slides through the guide groove. When the waist leans back against the two lumbar supports 2, the lumbar supports 2 swing backward, which triggers the two elastic sheet to deform and slide in the guide groove, thus guiding the two lumbar supports at the same time. Compared with a lumbar support that can swing freely in any direction, the elastic guide structure reduces the degree of asynchrony in the rotation of the two lumbar supports 2, and improves the support and comfort of the waist provided by the elastic lumbar support assembly.

[0024] Furthermore, such as Figure 5 As shown, in this embodiment, the auxiliary elastic element may only include the elastic guide portion 31, with one end of the elastic guide portion 31 inserted into the guide groove and the other end fixed to the support frame 1. This design can also guide the swing of the lumbar support 2. However, the deformation elastic force generated by the two sheet-like elastic guide portions 31 is limited and it is difficult to form a stable elastic support for the waist. Therefore, in this embodiment, an elastic support portion 3 fixed to the support frame 1 is provided between the two elastic guide portions 31. The elastic support portion 3 is integrally formed with the two elastic guide portions 31. When the two elastic guide portions 31 elastically deform and slide in the corresponding guide groove, the elastic support portion 3 elastically deforms and forms elastic support for the lumbar support 2. Figure 4As shown, when the waist leans back, the elastic guide part 31 deforms, and the elastic support part 3 also produces a slight elastic deformation. When the waist continues to lean back and the elastic guide part 31 deforms to its maximum, the elastic support part 3 will deform further and form a larger elastic support force on the lumbar support 2. This design conforms to the pressure change on the lumbar support 2 when the waist leans back, providing better elastic support for the waist. At the same time, since the elastic support part 3 and the two elastic guide parts 31 are integrally formed, the synchronicity of the elastic deformation of the two elastic guide parts 31 is also improved, and the guidance of the lumbar support 2 swings more smoothly.

[0025] Furthermore, in this embodiment, the elastic support 3 is an elastic ring fixed on the support frame 1 and integrally formed with the two elastic guides 31. The elastic ring is usually made of elastic plastic. The shape of the elastic ring can be any of the following: circular ring, elliptical ring, or polygonal ring. In this embodiment, only the elliptical ring is shown. The rear end of the elastic ring is provided with a mounting base 32, which is fixed on the base of the support frame 1. The elastic ring has a simple structure and is lightweight. The ring-shaped structure allows it to store more elastic potential energy, making it easier to deform and generate a larger elastic force when subjected to external force.

[0026] Furthermore, the swing connection structure is a connection point that allows the lumbar support 2 and the support frame 1 to swing back and forth. In this embodiment, two swing connection structures are provided. One of the swing connection structures includes an elastic connector (not shown). The elastic connector can be a compression spring or an elastic block. The elastic block is usually made of elastic plastic or rubber. The two ends of the elastic connector are fixed to the support frame 1 and the lumbar support 2, respectively. The swing and reset of the lumbar support 2 both rely on the elastic connector. When the swing seat 22 swings back and forth, the elastic connector generates elastic deformation and provides a reset force for the lumbar support 2.

[0027] Furthermore, another type of swing connection structure involves rotatably connecting the lumbar support 2 to the support frame 1, and placing an elastic reset element 5 between them for swing reset; such as Figure 6-7 As shown, the swing connection structure includes a fixed seat 12 and a swing seat 22 respectively installed on the support frame 1 and the lumbar support 2. The swing seat 22 and the fixed seat 12 are rotatably connected by a vertically extending rotating shaft 4. A reset elastic element 5 is also provided between the swing seat 22 and the fixed seat 12. When the lumbar support 2 is subjected to an external force and swings backward, the reset elastic element 5 can elastically deform and make the lumbar support 2 generate an elastic support force on the waist. When the external force is removed, the reset elastic element 5 forces the swing seat 22 to rotate to the initial position.

[0028] Furthermore, the elastic reset element 5 can be a torsion spring (not shown). The two elastic arms of the torsion spring can hook onto the fixed seat 12 and the swing seat 22 respectively. However, the torsion spring is relatively difficult to install and is easily exposed. Therefore, in this embodiment, a compression spring is preferred as the elastic reset element 5. Specifically, the fixed seat 12 is provided with a vertically extending central hole 15. The rotating shaft 4 is fixedly connected to the swing seat 22 and passes through the central hole 15. The fixed seat 12 is provided with a guide slope 13 at the end facing the swing seat 22. The swing seat 22 is provided with a corresponding mating slope 23 that fits with the guide slope 13. The rotating shaft 4 is provided with a first annular boss 41. The central hole 15 is provided with a second annular boss 14. The compression spring is sleeved on the rotating shaft 4. The rotating shaft 4 is provided with a screw hole 42 at the end facing the swing seat 22. The swing seat 22 is provided with a through hole. After the rotating shaft 4 passes through the central hole 15, the screw 6 passes through the through hole. The screw hole 42 is locked in to fix the swing seat 22 to the rotating shaft 4. The two ends of the compression spring abut against the first annular boss 41 and the second annular boss 14 respectively. When the swing seat 22 swings back and forth, the mating inclined surface 23 slides relative to the guiding inclined surface 13 and causes the rotating shaft 4 to move up and down, and causes the compression spring to deform or return to its original position. Therefore, when the lumbar support 2 swings backward, the compression spring deforms and generates an axial elastic force. The axial elastic force is converted into a circumferential elastic force on the lumbar support 2 through the contact between the mating inclined surface 23 and the guiding inclined surface 13, so that the lumbar support 2 provides elastic support to the waist. When the waist leaves the lumbar support 2, the compression spring returns to its original position and causes the mating inclined surface 23 to slide in the opposite direction relative to the guiding inclined surface 13, so that the lumbar support 2 returns to its initial position. In addition, this design also hides the compression spring, which is the elastic return component 5, in the center hole and does not expose it, making the appearance of the elastic lumbar support assembly simpler.

[0029] In summary, after the lumbar support 2 and the support frame 1 are connected by the aforementioned swing connection structure, the stability and synchronicity of their swing are poor. For example, after the elastic connector in the first swing connection structure is connected, the swing direction of the lumbar support 2 is random; in the second swing connection structure, the lumbar support 2 and the support frame 1 are rotatably connected by a pivot, and its swing stability and synchronicity are better. However, due to assembly errors and the elasticity of the lumbar support 2 itself, its stability and synchronicity still cannot meet the predetermined requirements; when the lumbar support 2 is gently moved, it still has a slight wobbling, which will visually create... This avoids a cheap feel; more importantly, when the lumbar support 2 rotates back and forth under the force of the waist, the lumbar support 2, which does not meet the requirements of stability and synchronization, will also affect the waist-hugging effect of the lumbar support. Therefore, based on this, this embodiment is provided with an elastic guide structure that can enhance the swing stability and synchronization of the lumbar support 2. In the initial state, the elastic guide part is inserted into the guide groove and pulls the lumbar support 2 to prevent it from shaking accidentally. When the waist leans back against the two lumbar supports 2, the elastic guide structure will be triggered immediately, causing the elastic guide part 31 to deform and form a swing guide for the lumbar support 2, reducing the degree of sway of the lumbar support 2.

[0030] Therefore, this embodiment proposes a seat, including the aforementioned elastic lumbar support assembly and a backrest, wherein the base of the support frame 1 is connected to the backrest, providing the seat with a stable elastic lumbar support function and improving the user experience of the seat.

[0031] Example 2: As Figure 8-9 As shown, this embodiment differs from the above embodiment in that the elastic support part 3 is part of the auxiliary elastic element, and the two elastic support parts 3 are separate from each other. Specifically, the auxiliary elastic element also includes an elastic support part 3 fixed on the support frame 1. Each elastic support part 3 is integrally formed with the corresponding elastic guide part 31. When the two elastic guide parts 31 elastically deform and slide in the corresponding guide groove, the corresponding elastic support part 3 elastically deforms and forms elastic support for the lumbar support 2. When the waist leans back, the two elastic guide parts 31 deform, and at this time the two elastic support parts 3 will also produce a small elastic deformation. When the waist continues to lean back and the elastic guide parts 31 deform to the maximum, the two elastic support parts 3 will further deform and form a larger elastic support force for the corresponding lumbar support 2. This design can also provide better elastic support for the waist.

[0032] Furthermore, in this embodiment, to ensure that the elastic support part 3 can deform stably and provide elastic support to the lumbar support 2, such as... Figure 8 As shown, each elastic support 3 is an elastic sheet extending along an arc-shaped trajectory, or as... Figure 9 As shown, the elastic support 3 can also be an elastic sheet extending in a wave-like trajectory; the wave-like or arc-shaped elastic sheet can store more elastic potential energy, so that the elastic support 3 can more easily produce elastic deformation when subjected to external force.

[0033] The present invention and its embodiments have been described above in an illustrative manner. This description is not restrictive, and the figures shown are only one embodiment of the present invention. The actual structure is not limited to this. Therefore, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit of the present invention, such design should fall within the protection scope of the present invention.

Claims

1. An elastic lumbar support assembly, characterized in that, include: The lumbar support assembly includes a support frame (1) and two lumbar supports (2) arranged symmetrically on the support frame (1). Each lumbar support (2) is connected to the support frame (1) through a swing connection structure and can swing back and forth. An elastic guide structure is provided between each lumbar support (2) and the support frame (1) and spaced apart from the swing connection structure on the left and right; the elastic guide structure includes an auxiliary elastic element provided on the support frame (1) and a guide groove provided on each lumbar support (2), the auxiliary elastic element including an elastic guide part (31) slidably connected in the corresponding guide groove. When the two waist supports (2) are subjected to a backward leaning force, the two elastic guide parts (31) generate elastic deformation and slide in the corresponding guide groove to guide the two waist supports (2) to swing backward synchronously.

2. The elastic lumbar support assembly according to claim 1, characterized in that: The lumbar support (2) includes a lumbar support body and a guide seat (21) provided on the lumbar support body. The guide seat (21) is provided with the guide groove running through it in the left and right directions. The elastic guide part (31) is an elastic sheet that slides through the guide groove.

3. The elastic lumbar support assembly according to claim 1, characterized in that: An elastic support (3) is provided between the two elastic guides (31) and fixed on the support frame (1). The elastic support (3) is integrally formed with the two elastic guides (31). When the two elastic guides (31) elastically deform and slide in the corresponding guide groove, the elastic support (3) elastically deforms and forms elastic support for the waist support (2).

4. The elastic lumbar support assembly according to claim 3, characterized in that: The elastic support (3) is an elastic ring that is fixed on the support frame (1) and integrally formed with the two elastic guides (31).

5. The elastic lumbar support assembly according to claim 1, characterized in that: The auxiliary elastic component also includes an elastic support part (3) fixed on the support frame (1). Each elastic support part (3) is integrally formed with the corresponding elastic guide part (31). When the two elastic guide parts (31) elastically deform and slide in the corresponding guide groove, the corresponding elastic support part (3) elastically deforms and forms elastic support for the waist support (2).

6. The elastic lumbar support assembly according to claim 5, characterized in that: The elastic support part (3) is an elastic sheet extending in a wave-shaped or arc-shaped trajectory.

7. The elastic lumbar support assembly according to claim 1, characterized in that: The swing connection structure includes an elastic connector, with both ends of the elastic connector fixed to the support frame (1) and the lumbar support (2) respectively; when the swing seat (22) swings back and forth, the elastic connector generates elastic deformation and provides a restoring force to the lumbar support (2).

8. The elastic lumbar support assembly according to claim 1, characterized in that: The swing connection structure includes a fixed seat (12) and a swing seat (22) respectively set on the support frame (1) and the waist support (2). The swing seat (22) and the fixed seat (12) are rotatably connected by a vertically extending pivot (4). A reset elastic element (5) is also provided between the swing seat (22) and the fixed seat (12). The reset elastic element (5) forces the swing seat (22) to always have the tendency to rotate to the initial position.

9. The elastic lumbar support assembly according to claim 8, characterized in that: The fixed seat (12) is provided with a vertically extending central hole (15), and the rotating shaft (4) is fixedly connected to the swing seat (22) and passes through the central hole (15); the fixed seat (12) is provided with a guide slope (13) at one end facing the swing seat (22), and the swing seat (22) is provided with a corresponding mating slope (23) that fits against the guide slope (13); the rotating shaft (4) is provided with a first annular boss (41), and the central hole (15) is provided with a corresponding second annular boss (14); the reset elastic element (5) is a compression spring sleeved on the rotating shaft (4), and the two ends of the compression spring abut against the first annular boss (41) and the second annular boss (14) respectively; when the swing seat (22) swings back and forth, the mating slope (23) slides relative to the guide slope (13) and causes the rotating shaft (4) to move up and down, and causes the compression spring to deform or reset.

10. A type of seat, characterized in that: Includes the elastic lumbar support assembly as described in claim 1.

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