Office chair back with self-adaptive waist rest

Abstract

An office chair back with a self-adaptive waist rest comprises a chair back frame and a waist rest device, a self-adaptive base is installed on the front side of the chair back frame, a self-adaptive sliding seat capable of ascending and descending relative to the self-adaptive base is installed on the self-adaptive base in a sliding mode, and the waist rest device is installed on the self-adaptive sliding seat; a self-adaptive inner groove is formed in the self-adaptive base, a self-adaptive sliding groove communicated with the self-adaptive inner groove is formed in the outer side of the self-adaptive base, a self-adaptive extending part extending into the self-adaptive inner groove from the self-adaptive sliding groove is arranged on the self-adaptive sliding seat, and a self-adaptive metal spring is arranged in the self-adaptive inner groove. One end of the self-adaptive metal spring is connected to the self-adaptive base, and the other end of the self-adaptive metal spring is connected to the self-adaptive extension part. Hidden installation of the self-adaptive metal spring is achieved, not only is the attractiveness of the office chair improved, but also the probability that external factors interfere with the self-adaptive metal spring can be reduced, and therefore the service life of the self-adaptive metal spring is prolonged, and stable use of the self-adaptive function of the waist rest device is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to office chair technical field, concretely relates to an office chair back with self -adaptation waist back. BACKGROUND

[0002] With the development of technology, more and more work needs to be completed in the office operation, and long sitting office will make people's lumbar spine suffer, often causing low back pain and other phenomena, so the supporting effect of office chair on the waist is very important.

[0003] The technical scheme of patent number CN202321391894.2 discloses a waist back structure of an office chair back with a self-adaptive function, comprising a backrest frame and a waist back, the backrest frame is rotatably connected with the upper end of the waist back, the lower end of the waist back is connected with one end of an elastic body, the other end of the elastic body is connected with the backrest frame, the waist back is pressed to rotate relative to the backrest frame, causing the elastic body to compress and have elastic thrust, the elastic body comprises elastic strips, the elastic strips are connected by elastic blocks and elastic links, the elastic strips are arc-shaped, the two ends of the elastic strips comprise elastic body backrest frame connecting holes and elastic body waist back connecting holes respectively, a sleeve block is arranged on the inner ring of the elastic body waist back connecting hole, the middle end of the backrest frame comprises a pivot seat mounting hole, the pivot seat mounting hole is connected with a pivot mounting seat, the lower end of the backrest frame comprises an elastic body mounting hole, the elastic body mounting hole is connected with the waist back elastic body connecting hole, the pivot mounting seat comprises a fixed block, the fixed block comprises a connecting hole and a pivot stop plate, the fixed block is rotatably connected with a pivot, and the connecting hole is connected with the pivot seat mounting hole. When a person sits on the chair, the person leans on the waist back part, the waist back is pressed by a certain extrusion force, and thus slightly rotates along the pivot relative to the backrest frame, but the other end of the waist back is connected with the elastic body, so that the elastic force of the elastic body is used to support the waist of the person, and the self-adaptive adjustment is realized by the person sitting and pressing, that is, the elastic body is retracted after being pressed, rebounds forward after the pressure is eliminated, and the elastic body continuously provides resistance to the back of the person, so that the back is tightly pressed.

[0004] However, the technical scheme uses the exposed elastic body to support the entire waist back, which can meet the supporting requirements, but the elastic body is exposed outside the office chair, which is not beautiful, and the exposed elastic body is easily disturbed by external factors (such as external collision and ultraviolet light degradation) due to frequent compression and deformation, the aging and damage efficiency of the elastic body is fast, which affects the stability of the waist back to some extent. UTILITY MODEL CONTENTS

[0005] In order to overcome the defects of the prior art, the utility model provides an office chair back with a self-adaptive waist back.

[0006] The utility model discloses a technical scheme that solves its technical problem is:

[0007] A kind of office chair back with adaptive waist rest, including chair back frame and waist rest device, it is characterized by: adaptive base is installed on the front side of the chair back frame, adaptive base is slidably installed with the adaptive sliding seat capable of lifting relative to adaptive base, the waist rest device is installed on adaptive sliding seat, adaptive sliding seat is configured to slide forward and downward when user leans on waist rest device;Adaptive base is equipped with adaptive inner groove, the outer side of adaptive base is equipped with adaptive sliding slot that is connected with adaptive inner groove, adaptive extension is provided on adaptive sliding seat and extends into adaptive inner groove from adaptive sliding slot, adaptive metal spring is provided in adaptive inner groove, one end of adaptive metal spring is connected to adaptive base, and the other end is connected to adaptive extension, and adaptive metal spring is configured to drive adaptive sliding seat to slide back and up by elastic force and reset.

[0008] In the utility model, adaptive base is equipped with adaptive sliding guide surface for sliding guide of adaptive sliding seat, and the adaptive sliding guide surface is adaptive guide arc surface with upper end extending along backward and upward direction in arc shape or adaptive guide plane with upper end extending along backward and upward direction in straight line.

[0009] In the utility model, adaptive sliding slot is two and is arranged from left to right on adaptive sliding guide surface, and the number of adaptive extension and adaptive sliding slot is matched, and each adaptive sliding slot is penetrated by one adaptive extension.

[0010] In the utility model, the lower end of adaptive inner groove and adaptive sliding slot is all set down through the bottom of adaptive base, and adaptive base is equipped with adaptive cover for closing adaptive inner groove and the lower end of adaptive sliding slot.

[0011] In the utility model, two adaptive extensions are jointly installed with adaptive mounting rod, adaptive metal spring is tension spring, one end of adaptive metal spring is fixed on adaptive base by bolt connection mode, and the other end is connected to adaptive mounting rod.

[0012] In the utility model, adaptive extension is equipped with adaptive guide portion for limiting adaptive extension to come out of adaptive sliding slot forward in one end of adaptive inner groove, and adaptive guide convex portion capable of sliding contact with adaptive guide portion is protruded on the groove surface of adaptive inner groove.

[0013] In this invention, the adaptive inner groove is equipped with an adaptive buffer block for blocking the adaptive slide when it moves backward and upward to the end point, and each adaptive buffer block corresponds to an adaptive extension.

[0014] In this invention, the adaptive inner groove is provided with a rubber block mounting groove, and the adaptive buffer rubber block is partially positioned and installed in the rubber block mounting groove and fixed with rubber block bolts.

[0015] In this invention, the adaptive slide block is provided with at least two adaptive pulley assemblies that slide on the adaptive sliding guide surface.

[0016] In this invention, the adaptive slide block is provided with an adaptive pulley groove, which includes an axle slot and at least two roller slots disposed within the axle slot. Each adaptive pulley assembly includes an adaptive axle and at least two adaptive rollers mounted on the adaptive axle from left to right. The adaptive axle is installed within the axle slot, and each adaptive roller corresponds to one roller slot. The adaptive roller is disposed within the roller slot and partially extends out of the roller slot to roll in contact with the adaptive sliding guide surface.

[0017] The beneficial effects of this utility model are as follows: This utility model achieves the adaptive function of the lumbar support device through the cooperation of the adaptive base, adaptive slide and adaptive metal spring, which effectively meets the user's lumbar support requirements. At the same time, the adaptive metal spring is set in the adaptive inner groove, which realizes the hidden installation of the adaptive metal spring. This not only improves the aesthetics of the office chair, but also reduces the probability of external factors interfering with the adaptive metal spring, thereby extending the service life of the adaptive metal spring. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0019] Figure 1 A 3D view of the back of an office chair;

[0020] Figure 2 A schematic diagram of the combination of adaptive base, adaptive slide and adaptive metal spring;

[0021] Figure 3 This is a schematic diagram of the installation of the lumbar support bracket;

[0022] Figure 4 This is a schematic diagram of the combination of the adaptive base and the adaptive slide.

[0023] Figure 5 This is a schematic diagram of the installation of the adaptive pulley assembly;

[0024] Figure 6 Exploded view of the lumbar support device;

[0025] Figure 7 This is a schematic diagram of the installation of the lumbar support spring assembly;

[0026] Figure 8 This is a schematic diagram of the installation of the flexible connecting steel sheet. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0028] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0029] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0030] Reference Figures 1-8An office chair backrest with adaptive lumbar support includes a backrest frame 1 and a lumbar support device 2. The bottom of the backrest frame 1 has a seat connecting arm 3. An adaptive base 4 is mounted on the front side of the backrest frame 1. An adaptive slide 5, which can be raised and lowered relative to the adaptive base 4, is slidably mounted on the adaptive base 4. The lumbar support device 2 is mounted on the adaptive slide 5. The adaptive slide 5 is configured to slide forward and downward when the user leans against the lumbar support device 2. The adaptive base 4 has an adaptive inner groove 41, and the outer side of the adaptive base 4 has an adaptive groove 42 communicating with the adaptive inner groove 41. The adaptive slide 5 has an adaptive extension 51 extending from the adaptive groove 42 into the adaptive inner groove 41. An adaptive metal spring 6 is located within the adaptive inner groove 41. One end of the adaptive metal spring 6 is connected to the adaptive base 4, and the other end is connected to the adaptive extension 51. The adaptive metal spring 6 is configured to use its elasticity to drive the adaptive slide 5 to slide backward and upward to reset, thereby providing a certain support force to support the user's waist.

[0031] In this embodiment, the adaptive metal spring 6 is set in the adaptive inner groove 41, realizing the hidden installation of the adaptive metal spring 6. This not only improves the aesthetics of the office chair, but also reduces the probability of external factors interfering with the adaptive metal spring 6, thereby extending the service life of the adaptive metal spring 6.

[0032] In a preferred embodiment, the adaptive base 4 is provided with an adaptive sliding guide surface 43 for guiding the sliding of the adaptive slide block 5. The adaptive sliding guide surface 43 is an adaptive guide arc surface that extends in an arc shape along the rearward and upward direction at the upper end or an adaptive guide plane that extends in a straight line along the rearward and upward direction at the upper end. It is preferably an adaptive guide arc surface, which allows for smooth sliding.

[0033] In this embodiment, there are two adaptive grooves 42 on the adaptive sliding guide surface 43, arranged from left to right. The number of adaptive extensions 51 matches that of the adaptive grooves 42. Each adaptive groove 42 is inserted into one of the adaptive extensions 51 so that the adaptive extensions 51 can extend into the adaptive inner groove 41.

[0034] In this embodiment, for ease of installation, the lower ends of both the adaptive inner groove 41 and the adaptive slide 42 extend downwards through the bottom of the adaptive base 4. An adaptive cover 7 is installed on the adaptive base 4 to close the lower ends of the adaptive inner groove 41 and the adaptive slide 42. The adaptive cover 7 is installed on the adaptive base 4 by bolt connection. During installation, the adaptive extension 51 first enters the adaptive inner groove 41 and the adaptive slide 42 from the opening position at the lower end of the adaptive inner groove 41 and the adaptive slide 42. Then, the adaptive cover 7 closes the opening position at the lower end of the adaptive inner groove 41 and the adaptive slide 42 to prevent the adaptive extension 51 from slipping off.

[0035] In this embodiment, the two adaptive extensions 51 are jointly mounted with an adaptive mounting rod 8. The adaptive metal spring 6 is a tension spring. One end of the adaptive metal spring 6 is fixed to the adaptive base 4 by bolt connection, and the other end is connected to the adaptive mounting rod 8, thereby completing the installation of the adaptive metal spring 6.

[0036] In this embodiment, the adaptive extension 51 is provided with an adaptive guide 52 at one end of the adaptive inner groove 41 to limit the adaptive extension 51 from moving forward out of the adaptive slide groove 42. The groove surface of the adaptive inner groove 41 has an adaptive guide protrusion 44 that can slide in contact with the adaptive guide 52, thereby preventing the adaptive guide 52 from directly sliding in contact with the groove surface of the adaptive inner groove 41, reducing sliding friction and improving the smoothness of the adaptive function.

[0037] In this embodiment, the adaptive inner groove 41 is equipped with an adaptive buffer block 9 for blocking the adaptive slide 5 when it moves backward and upward to the end point. Each adaptive buffer block 9 corresponds to an adaptive extension 51. Specifically, the adaptive inner groove 41 is provided with a block mounting groove, and the adaptive buffer block 9 is partially positioned and installed in the block mounting groove and fixed with block bolts.

[0038] In this embodiment, the adaptive slide 5 is provided with at least two adaptive pulley assemblies 10 that slide on the adaptive sliding guide surface 43. The adaptive slide 5 is provided with an adaptive pulley groove 53, which includes an axle slot and at least two roller slots disposed within the axle slot. Each adaptive pulley assembly 10 includes an adaptive axle 101 and at least two adaptive rollers 102 mounted on the adaptive axle 101 from left to right. The adaptive axle 101 is installed in the axle slot, and each adaptive roller 102 corresponds to a roller slot. The adaptive roller 102 is disposed within the roller slot and partially extends out of the roller slot to roll in contact with the adaptive sliding guide surface 43, thereby reducing friction when the adaptive slide 5 slides relative to the adaptive base 4, which is beneficial for the adaptive slide 5 to cooperate with the lumbar support device 2 to adaptively support the user's waist.

[0039] In a preferred embodiment, the lumbar support device 2 includes a lumbar support bracket 21 bolted to the front end of the adaptive slide block 5, two symmetrically arranged side support components 22, and a middle support component 23 located between the two side support components 22. The front end of the lumbar support bracket 21 is provided with two lumbar support spring components 24 for elastically supporting the lumbar support device 2. Each side support component 22 is mounted on a lumbar support spring component 24. The middle support component 23 and the side support components 22 are connected by an elastic steel sheet module, so that the two side support components 22 can better fit and support the sides of the user's waist.

[0040] In this embodiment, the back of the lumbar support bracket 21 is provided with a sliding seat positioning groove in the middle. The adaptive sliding seat 5 is positioned and fitted in the sliding seat positioning groove and is fixedly connected to the lumbar support bracket 21 by bolt connection, so that the lumbar support bracket 21 and the adaptive sliding seat 5 are better positioned and fitted together.

[0041] In this embodiment, the side-support assembly 22 includes a side-support back seat 221, a side-support pressure frame 222 bolted to the front end of the side-support back seat 221, and a side-support cushion fitted onto the front end of the side-support pressure frame 222. The outer periphery of the side-support cushion is clamped and fixed between the side-support back seat 221 and the side-support pressure frame 222 for fixation. The side-support cushion is not shown in the figures. The lumbar support spring assembly 24 includes an elastic telescopic rubber sleeve 240, a front spring seat 241, a rear spring seat 242, and two lumbar support springs 243 distributed from top to bottom between the front spring seat 241 and the rear spring seat 242. The front spring seat 241, the rear spring seat 242, and the lumbar support springs 243 are all located in an elastic... The telescopic rubber sleeve 240 is used to reduce the likelihood of dust and water adhering to the front spring seat 241, rear spring seat 242, and lumbar support spring 243, thereby improving their lifespan. The front spring seat 241 is bolted to the side rear seat 221, and the rear spring seat 242 is bolted to the lumbar support bracket 21. The front end of the lumbar support spring 243 is clamped and fixed to the front spring seat 241 by the front spring clip 244, and the rear end is clamped and fixed to the rear spring seat 242 by the rear spring clip 245. The rear spring clip 245 and the rear spring seat 242, as well as the front spring clip 244 and the front spring seat 241, are all fixedly connected by bolts.

[0042] In this embodiment, the center support assembly 23 includes a center support back seat 231, a center support pressure frame 232 bolted to the front end of the center support back seat 231, and a center support cushion 233 fitted onto the front end of the center support pressure frame 232. The outer periphery of the center support cushion 233 is clamped and fixed between the center support back seat 231 and the center support pressure frame 232 for fixation. Further, the front side of the side support back seat 221 is provided with a first steel plate positioning post 2211 and a first steel plate positioning part 2212, and the center support back seat 231 is provided with a second steel plate positioning post 2311 and a second steel plate positioning part 2312. The elastic steel plate module includes at least one elastic connecting steel plate 25. One end of the elastic connecting steel plate 25 is provided with a first steel plate hole for the first steel plate positioning post 2211 to pass through and a first steel plate groove for the first steel plate positioning part 2212 to pass through, and the other end is provided with... There is a second steel plate hole through which the second steel plate positioning post 2311 passes and a second steel plate groove through which the second steel plate positioning part 2312 passes. The first steel plate positioning post 2211 and the second steel plate positioning post 2311 are both equipped with steel plate limiting pads by bolt connection, thereby preventing the elastic connecting steel plate 25 from detaching from the first steel plate positioning post 2211 and the second steel plate positioning post 2311, thereby ensuring the assembly quality between the elastic connecting steel plate 25, the side back seat 221 and the middle back seat 231.

[0043] The above description is only a preferred embodiment of the present utility model. Any technical solution that achieves the purpose of the present utility model by essentially the same means shall fall within the protection scope of the present utility model.

Claims

1. An office chair back with adaptive lumbar support, comprising a backrest frame (1) and a lumbar support device (2), characterized in that: An adaptive base (4) is installed on the front side of the chair back frame (1). An adaptive slide (5) that can be raised and lowered relative to the adaptive base (4) is slidably installed on the adaptive base (4). The lumbar support device (2) is installed on the adaptive slide (5). The adaptive slide (5) is configured to slide forward and downward when the user leans on the lumbar support device (2). An adaptive inner groove (41) is provided inside the adaptive base (4). An adaptive slide groove (42) that connects to the adaptive inner groove (41) is provided on the outer side of the adaptive base (4). An adaptive extension (51) that extends from the adaptive slide groove (42) into the adaptive inner groove (41) is provided on the adaptive slide (5). An adaptive metal spring (6) is provided inside the adaptive inner groove (41). One end of the adaptive metal spring (6) is connected to the adaptive base (4), and the other end is connected to the adaptive extension (51). The adaptive metal spring (6) is configured to drive the adaptive slide (5) to slide backward and upward to reset through elastic force.

2. The office chair backrest with adaptive lumbar support according to claim 1, characterized in that: The adaptive base (4) is provided with an adaptive sliding guide surface (43) for guiding the adaptive slide (5) to slide. The adaptive sliding guide surface (43) is an adaptive guide arc surface that extends in an arc shape at the upper end in the rearward and upward direction or an adaptive guide plane that extends in a straight line at the upper end in the rearward and upward direction.

3. The office chair backrest with adaptive lumbar support according to claim 2, characterized in that: There are two adaptive slides (42) on the adaptive sliding guide surface (43) arranged from left to right. The number of adaptive extensions (51) matches the number of adaptive slides (42), and each adaptive slide (42) passes through one of the adaptive extensions (51).

4. The office chair backrest with adaptive lumbar support according to any one of claims 1-3, characterized in that: The lower ends of the adaptive inner groove (41) and the adaptive slide (42) are both set to penetrate downward through the bottom of the adaptive base (4), and the adaptive base (4) is equipped with an adaptive cover (7) that closes the lower ends of the adaptive inner groove (41) and the adaptive slide (42).

5. The office chair backrest with adaptive lumbar support according to claim 4, characterized in that: The two adaptive extensions (51) are jointly mounted on an adaptive mounting rod (8). The adaptive metal spring (6) is a tension spring. One end of the adaptive metal spring (6) is fixed to the adaptive base (4) by bolt connection, and the other end is connected to the adaptive mounting rod (8).

6. The office chair backrest with adaptive lumbar support according to claim 4, characterized in that: The adaptive extension (51) is provided with an adaptive guide (52) at one end of the adaptive inner groove (41) for limiting the adaptive extension (51) from moving forward out of the adaptive slide groove (42). The groove surface of the adaptive inner groove (41) has an adaptive guide protrusion (44) that can slide in contact with the adaptive guide (52).

7. The office chair backrest with adaptive lumbar support according to any one of claims 1-3, characterized in that: The adaptive inner groove (41) is equipped with an adaptive buffer block (9) for blocking the adaptive slide (5) when it moves backward and upward to the end point. Each of the adaptive buffer blocks (9) corresponds to an adaptive extension (51).

8. The office chair backrest with adaptive lumbar support according to claim 7, characterized in that: The adaptive inner groove (41) is provided with a rubber block mounting groove, and the adaptive buffer rubber block (9) is partially positioned and installed in the rubber block mounting groove and fixed with rubber block bolts.

9. The office chair backrest with adaptive lumbar support according to claim 3, characterized in that: The adaptive slide (5) is provided with at least two adaptive pulley assemblies (10) that slide on the adaptive sliding guide surface (43).

10. The office chair backrest with adaptive lumbar support according to claim 9, characterized in that: The adaptive slide (5) is provided with an adaptive pulley groove (53). The adaptive pulley groove (53) includes a wheel axle slot and at least two roller slots provided in the wheel axle slot. Each adaptive pulley assembly (10) includes an adaptive wheel axle (101) and at least two adaptive rollers (102) mounted on the adaptive wheel axle (101) from left to right. The adaptive wheel axle (101) is installed in the wheel axle slot. Each adaptive roller (102) corresponds to a roller slot. The adaptive roller (102) is provided in the roller slot and partially extends out of the roller slot to roll in contact with the adaptive sliding guide surface (43).

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