A lumbar support lifting structure

Abstract

The utility model relates to the technical field of seat adjustment, specifically relates to a waist support lifting structure, the waist support lifting structure includes support base, the telescopic drive assembly of installation in support base and telescopic linkage assembly, the telescopic drive assembly is driven the waist support subassembly to be close to or away from support base through telescopic linkage assembly. The utility model discloses a waist support lifting structure that is stable in structure, drives smoothly, adjusts accurately, and is not easy to sway with strong supporting force.

Description

Technical Field

[0001] This utility model relates to the field of seat adjustment technology, specifically to a lumbar support lifting structure. Background Technology

[0002] With modern people spending increasingly more time sitting, the comfort of the lower back is crucial, whether at work or driving. The lumbar support design of seats aims to provide effective support for the user's lumbar spine, relieving fatigue and preventing lower back problems.

[0003] Existing lumbar supports can be broadly categorized into fixed and adjustable types. Fixed lumbar supports cannot accommodate the different body shapes and sitting postures of users. Among adjustable lumbar supports, manual adjustment mechanisms are often inconvenient to operate, requiring users to turn around or reach behind the chair to make adjustments. Electric adjustment mechanisms, on the other hand, are often complex in their current design, have numerous parts, occupy a lot of space, or are not stable during the lifting and lowering process, easily causing wobbling or jamming. Furthermore, their transmission efficiency may decrease after long-term use.

[0004] Therefore, how to provide a lumbar support lifting structure that is compact, has stable transmission, smooth adjustment, and strong support is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a lumbar support lifting structure that is structurally stable, drives smoothly, adjusts precisely, provides strong support, and is not easily shaken.

[0006] This utility model is achieved through the following technical solution: A lumbar support lifting structure includes a support base, a telescopic drive assembly mounted on the support base, and a telescopic linkage assembly. The telescopic drive assembly drives the lumbar support assembly to move closer to or away from the support base through the telescopic linkage assembly.

[0007] The telescopic drive assembly includes a telescopic drive motor, a telescopic transmission gearbox, a telescopic lead screw, and a telescopic nut. The output end of the telescopic drive motor is driven by the telescopic lead screw through the telescopic transmission gearbox, and the telescopic nut is screwed onto the telescopic lead screw and connected to the input end of the telescopic linkage assembly.

[0008] The telescopic linkage component includes a first swing arm and a second swing arm. One end of the first swing arm is rotatably connected to the support base, and one end of the second swing arm is rotatably connected to the waist support component. The other end of the first swing arm is rotatably and slidably connected to the lumbar support assembly, and the other end of the second swing arm is slidably connected to the support base and rotatably connected to the output end of the telescopic drive assembly; The first swing arm and the second swing arm are rotatably connected at their intersection.

[0009] The lumbar support assembly is provided with a first guide groove, the support base is provided with a second guide groove, the other end of the first swing arm is rotatably connected to a first guide post, and the other end of the second swing arm is rotatably connected to a second guide post. The other end of the first swing arm is rotatably slidably connected to the lumbar support assembly through the cooperation of the first guide post and the first guide groove, and the other end of the second swing arm is rotatably slidably connected to the support base through the cooperation of the second guide post and the second guide groove.

[0010] The number of the first swing arm and the second swing arm is two or more, and the two sets of the first swing arm and the second swing arm are symmetrically arranged about the output end of the telescopic drive component. The number of the first guide groove, the second guide groove, and the first guide post corresponds to the number of the first swing arm and the second swing arm.

[0011] The second guide post is rotatably connected between the other ends of the two first swing arms.

[0012] The beneficial effects of this utility model are: This utility model discloses a lumbar support lifting structure, which is equipped with a support base, a lumbar support component, a telescopic drive component, and a telescopic linkage component. It has a stable structure, smooth drive, precise adjustment, strong support force, and is not easy to shake. Attached Figure Description

[0013] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the lifting structure of this utility model.

[0015] Figure 2 This is a partial structural diagram of the lifting structure of this utility model.

[0016] Figure Labels Support base--101, Lumbar support assembly--102, Telescopic drive assembly--201, Telescopic drive motor--202, Telescopic transmission gearbox--203, Telescopic lead screw--204, Telescopic nut--205 Telescopic linkage assembly--301, first swing arm--302, second swing arm--303, first guide groove--304, second guide groove--305, first guide post--306, second guide post--307. Detailed Implementation

[0017] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0018] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0020] like Figures 1 to 2 As shown, this embodiment provides a lumbar support lifting structure, which includes a support base 101, a lumbar support assembly 102, a telescopic drive assembly 201 installed on the support base 101, and a telescopic linkage assembly 301. The telescopic drive assembly 201 drives the lumbar support assembly 102 to move closer to or away from the support base 101 through the telescopic linkage assembly 301.

[0021] This embodiment provides a modular design concept. The support base 101 serves as the base of the entire structure and can be fixed to the backrest frame of the seat. The telescopic drive assembly 201 serves as the power source, and the telescopic linkage assembly 301 serves as the transmission mechanism. When the lumbar support position needs to be adjusted, the telescopic drive assembly 201 is activated. The power output of this assembly drives the telescopic linkage assembly 301 to move. The telescopic linkage assembly 301 then drives the lumbar support assembly 102 (i.e., the support component that directly contacts the user's back) to move relative to the support base 101 (e.g., up and down or forward and backward), thereby achieving precise adjustment of the lumbar support position to adapt to the needs of different users.

[0022] As a preferred embodiment, the telescopic drive assembly 201 includes a telescopic drive motor 202, a telescopic transmission gearbox 203, a telescopic lead screw 204, and a telescopic nut 205. The output end of the telescopic drive motor 202 is driven and connected to the telescopic lead screw 204 through the telescopic transmission gearbox 203. The telescopic nut 205 is screwed onto the telescopic lead screw 204 and connected to the input end of the telescopic linkage assembly 301.

[0023] In this embodiment, a telescopic drive motor 202 (e.g., a DC micro motor) provides rotational power; a telescopic transmission gearbox 203 (e.g., a worm gear or planetary gearbox) reduces the speed and increases the torque of the output of the telescopic drive motor 202 to provide sufficient force to drive the lumbar support; the output of the telescopic transmission gearbox 203 drives the telescopic lead screw 204 to rotate; a telescopic nut 205 is screwed onto the telescopic lead screw 204 and is connected to the telescopic linkage assembly 301, thus subjecting itself to rotational constraints (i.e., the nut itself cannot rotate). Therefore, when the telescopic lead screw 204 rotates, the telescopic nut 205 can only translate along the axial direction of the telescopic lead screw 204, constituting the power input for driving the telescopic linkage assembly 301. Precise control of the lumbar support position can be achieved by controlling the number of rotations of the telescopic drive motor 202.

[0024] In addition, when used with a telescopic transmission gearbox 203 that has a self-locking function or a telescopic lead screw 204 with a small lead angle, this drive assembly has good self-locking performance when power is off. This means that even if the user's back is pressed against the lumbar support, the lumbar support will not slip down on its own, ensuring the stability of the support and reducing energy consumption; the lead screw and nut drive operates smoothly with low noise, improving the user's adjustment experience.

[0025] As a preferred embodiment, the telescopic linkage assembly 301 includes a first swing arm 302 and a second swing arm 303. One end of the first swing arm 302 is rotatably connected to the support base 101, and one end of the second swing arm 303 is rotatably connected to the lumbar support assembly 102. The other end of the first swing arm 302 is rotatably slidably connected to the lumbar support assembly 102, and the other end of the second swing arm 303 is slidably connected to the support base 101 and rotatably connected to the output end of the telescopic drive assembly 201. The first swing arm 302 and the second swing arm 303 are rotatably connected at their intersection.

[0026] The telescopic linkage component 301 in this embodiment adopts an X-shaped or scissor-type linkage mechanism. The first swing arm 302 and the second swing arm 303 are rotatably connected at the intersection to form an X shape. The support base 101 is a fixed platform, and the waist support component 102 is a movable platform.

[0027] One end of the first swing arm 302 is fixedly rotated on the support base 101, forming a fixed pivot point; one end of the second swing arm 303 is fixedly rotated on the lumbar support assembly 102, forming a movable pivot point; the other end of the first swing arm 302 slides on the lumbar support assembly 102, and the other end of the second swing arm 303 slides on the support base 101; the output end of the telescopic drive assembly 201 (i.e., the telescopic nut 205 in this embodiment) is connected to the sliding end of the second swing arm 303.

[0028] When the telescopic nut 205 is driven (e.g., translated outwards), it pushes the bottom end of the second swing arm 303 to slide on the support base 101. Due to the geometric constraints of the X-shaped structure, the sliding of the second swing arm 303 forces a change in the angle between the first swing arm 302 and the second swing arm 303, thereby pushing the top end of the second swing arm 303 and the sliding end of the first swing arm 302 (both connected to the lumbar support assembly 102) to rise as a whole, i.e., driving the lumbar support assembly 102 away from the support base 101; conversely, the telescopic nut 205 moves in the opposite direction, causing the lumbar support assembly 102 to move closer to the support base 101. This can stably convert the linear translational motion of the telescopic drive assembly 201 into the lifting motion of the lumbar support assembly 102, resulting in a stable structure and reliable transmission.

[0029] As a preferred embodiment, the lumbar support assembly 102 is provided with a first guide groove 304, the support base 101 is provided with a second guide groove 305, the other end of the first swing arm 302 is rotatably connected to a first guide post 306, the other end of the second swing arm 303 is rotatably connected to a second guide post 307, the other end of the first swing arm 302 is rotatably slidably connected to the lumbar support assembly 102 through the cooperation of the first guide post 306 and the first guide groove 304, and the other end of the second swing arm 303 is rotatably slidably connected to the support base 101 through the cooperation of the second guide post 307 and the second guide groove 305.

[0030] The sliding end of the first swing arm 302 is provided with a first guide post 306 (such as a pin or roller), and the waist support assembly 102 is provided with a first guide groove 304. The first guide post 306 can both rotate and slide within the first guide groove 304.

[0031] The sliding end (i.e., the drive input end) of the second swing arm 303 is provided with a second guide post 307, and a second guide groove 305 is formed on the support base 101. The second guide post 307 slides within the second guide groove 305. The cooperation between the guide post and the guide groove provides a clear motion trajectory for the sliding end, ensuring the smoothness of the scissor mechanism during lifting and lowering, and preventing derailment or jamming during movement; at the same time, the second guide groove 305 also provides rotational constraint for the telescopic nut 205 (connected to the second guide post 307).

[0032] As a preferred embodiment, the number of the first swing arm 302 and the second swing arm 303 is two or more, and the two sets of first swing arms 302 and second swing arms 303 are symmetrically arranged about the output end of the telescopic drive assembly 201; the number of the first guide groove 304, the second guide groove 305, and the first guide post 306 corresponds to the number of the first swing arm 302 and the second swing arm 303.

[0033] Because a single X-shaped scissor mechanism is prone to torsion, swaying, or tilting when subjected to lateral forces or uneven loads (such as when a user leans against it, where the pressure is not completely uniformly distributed), this embodiment employs at least two sets of scissor mechanisms (for example, one set on each of the left and right sides of the central telescopic drive assembly 201) to form a symmetrical layout. The symmetrical multi-linkage mechanism (like multiple legs of a platform) greatly improves the motion stability and support rigidity of the lumbar support assembly 102. It can effectively resist torsional loads and prevent the lumbar support from tilting and swaying when lifting or under force. In addition, the user's back pressure is evenly distributed to multiple linkage mechanisms, reducing the stress at individual pivot points or sliding points, thereby improving the service life and durability of the entire structure. The symmetrical structure ensures that the lumbar support assembly 102 always maintains a stable posture during lifting.

[0034] As a preferred embodiment, the second guide post 307 is rotatably connected between the other ends of the two second swing arms 303.

[0035] Preferably, the telescopic nut 205 drives the second guide post 307, making the second guide post 307 a shared slider, which is simultaneously connected to the sliding end of all the second swing arms 303 (i.e., at the second guide post 307). In this way, the central single power source can simultaneously and equidistantly push (or pull) all the symmetrical linkage mechanisms, ensuring perfect synchronization on the drive side.

[0036] Similarly, on one side of the lumbar support assembly 102, the sliding ends of all the first swing arms 302 can be connected together by the first guide post 306. By connecting the other ends (sliding ends) of two or more first swing arms 302 through one first guide post 306, the rigidity of the top of the lumbar support assembly 102 can be further strengthened, ensuring that the lifting height on both sides remains consistent under any load, and preventing asynchronous movement on both sides due to assembly errors or long-term wear.

[0037] In summary, the lumbar support lifting structure of this embodiment has the following effects: The symmetrical scissor linkage mechanism effectively resists off-center loading and torsion, ensuring that the lumbar support is stable and does not wobble during lifting and support. It adopts a drive method of motor and lead screw nut, which provides smooth transmission, low noise, and precise position control.

[0038] The lead screw drive has good self-locking properties, and the waist support will not slip when the power is off, making it safe and reliable; The overall structure is reasonably designed, occupies little space, and is easy to integrate into the backrest frame of various seats.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A lumbar support lifting structure, characterized in that, It includes a support base, a lumbar support assembly, a telescopic drive assembly installed on the support base, and a telescopic linkage assembly. The telescopic drive assembly drives the lumbar support assembly to move closer to or away from the support base through the telescopic linkage assembly.

2. The lumbar support lifting structure according to claim 1, characterized in that, The telescopic drive assembly includes a telescopic drive motor, a telescopic transmission gearbox, a telescopic lead screw, and a telescopic nut. The output end of the telescopic drive motor is driven by the telescopic lead screw through the telescopic transmission gearbox, and the telescopic nut is screwed onto the telescopic lead screw and connected to the input end of the telescopic linkage assembly.

3. The lumbar support lifting structure according to claim 1, characterized in that, The telescopic linkage component includes a first swing arm and a second swing arm. One end of the first swing arm is rotatably connected to the support base, and one end of the second swing arm is rotatably connected to the waist support component. The other end of the first swing arm is rotatably and slidably connected to the lumbar support assembly, and the other end of the second swing arm is slidably connected to the support base and rotatably connected to the output end of the telescopic drive assembly; The first swing arm and the second swing arm are rotatably connected at their intersection.

4. The lumbar support lifting structure according to claim 3, characterized in that, The lumbar support assembly is provided with a first guide groove, the support base is provided with a second guide groove, the other end of the first swing arm is rotatably connected to a first guide post, and the other end of the second swing arm is rotatably connected to a second guide post. The other end of the first swing arm is rotatably slidably connected to the lumbar support assembly through the cooperation of the first guide post and the first guide groove, and the other end of the second swing arm is rotatably slidably connected to the support base through the cooperation of the second guide post and the second guide groove.

5. The lumbar support lifting structure according to claim 3, characterized in that, The number of the first swing arm and the second swing arm is two or more, and the two sets of the first swing arm and the second swing arm are symmetrically arranged about the output end of the telescopic drive component; The number of the first guide groove, the second guide groove, and the first guide post corresponds to the number of the first swing arm and the second swing arm.

6. The lumbar support lifting structure according to claim 5, characterized in that, The second guide post is rotatably connected between the other ends of the two second swing arms.

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