Elastic means centered lumbar support

Abstract

The utility model provides a kind of elastic device centered waist rest, including waist rest assembly, guide assembly and elastic piece;Waist rest assembly includes main waist rest and the auxiliary waist rest articulated on the both sides of main waist rest;Guide assembly includes middle mounting plate, side unfolding plate and sliding guide structure, the inner articulated end of two side unfolding plates is respectively hinged with the both sides end of middle mounting plate, and the outer articulated end of two side unfolding plates is respectively hinged with the outer articulated end of two auxiliary waist rests;Main waist rest is oppositely arranged with middle mounting plate along sliding direction, and sliding guide structure is arranged between main waist rest and middle mounting plate, and elastic piece is further arranged between main waist rest and middle mounting plate.The utility model aims at presenting a kind of elastic device centered waist rest, which realizes the self-adapting effect of flat push back spring by the mounting structure of guide structure cooperation elastic piece, so that

Description

Technical Field

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

[0002] The core purpose of lumbar support in seats is to adapt to the physiological curves of the human body, relieve pressure on the lower back, and functionally solve problems such as the lower back being unsupported and muscle strain when sitting for a long time, ultimately protecting the health of the lumbar spine and improving riding comfort.

[0003] Existing lumbar supports adjust the extension of the lumbar support blocks by adjusting the stroke, thereby changing the position of the lumbar support and adapting it to different user support requirements. However, the stroke of this type of lumbar support is fixed after adjustment, and apart from the lumbar support covering material, there is no other elastic adaptation function. The lower back will feel "stiffly supported". Therefore, elastic adaptive function will be set in the lumbar support of the seat.

[0004] The core of the elastic adaptive function is to provide elasticity to the lumbar support. There are different elastic structure settings. One existing method is to hinge the entire lumbar support component to the seat in an elastic flipping manner through the rebound structure. The elasticity is achieved by the upward flipping force of the rebound structure.

[0005] The above method has a complex structure, and the rebound trajectory is a flipping rebound centered on the pivot, which cannot allow the waist support to achieve elastic self-adaptation by pushing back. Utility Model Content

[0006] To address the aforementioned shortcomings, the purpose of this utility model is to propose a lumbar support with a centrally located elastic device. This device, through a guide structure and an installation structure for the elastic element, enables the lumbar support to achieve an adaptive effect of pushing and rebounding.

[0007] To achieve this objective, the present invention adopts the following technical solution: A lumbar support with an elastic device in the center includes a lumbar support assembly, a guide assembly, and an elastic element; The lumbar support assembly includes a main lumbar support and secondary lumbar supports hinged to both sides of the main lumbar support; The guide assembly includes a central mounting plate, side unfolding plates, and a sliding guide structure. The inner hinge ends of the two side unfolding plates are respectively hinged to the two side ends of the central mounting plate, and the outer hinge ends of the two side unfolding plates are respectively hinged to the outer hinge ends of the two auxiliary waist supports. The main lumbar support and the middle mounting plate are arranged opposite each other along the sliding direction. A sliding guide structure is provided between the main lumbar support and the middle mounting plate, and an elastic element is also provided between the main lumbar support and the middle mounting plate.

[0008] Preferably, the sliding guide structure includes an inner sleeve and an outer sleeve; The inner sleeve is fixedly installed at the rear of the main lumbar support, and the outer sleeve is fixedly installed on the side of the middle mounting plate opposite to the main lumbar support. The inner sleeve is slidably sleeved on the outer sleeve. The two ends of the elastic element are respectively pressed against the bottom of the inner sleeve and the bottom of the outer sleeve. When the main waist support and the middle mounting plate are in a naturally open state, the opposite ends of the inner sleeve and the outer sleeve are interlocked. When the main waist support and the middle mounting plate are in a close state, the middle to the rear of the inner sleeve and the outer sleeve are interlocked.

[0009] Preferably, it also includes a stroke adjustment assembly; the stroke adjustment assembly includes a rotary block, a screw, and a stroke block; A rotating block is rotatably mounted at the center of the central mounting plate, and a screw is fixedly mounted on the rotating block and located inside the outer sleeve on the inner surface of the central mounting plate; The inner cavity of the outer sleeve is provided with a stroke block guide groove, the stroke block is slidably accommodated in the stroke block guide groove, and the stroke block and the screw are threadedly engaged; The back of the main lumbar support is provided with a top cylinder opposite to the stroke block. Both the top cylinder and the stroke block are located in the inner ring of the elastic element, which is housed in the cavity formed by the inner sleeve and the outer sleeve.

[0010] Furthermore, the centers of the inner sleeve, outer sleeve, screw, stroke block, and top cylinder are located on the same axis; The inner cavity of the guide groove of the stroke block is square, and the stroke block is provided with a square guide part that matches the inner cavity of the guide groove.

[0011] Furthermore, it also includes a height adjustment plate; The back of the central mounting plate is provided with multiple bolt holes, and the height adjustment plate is provided with multiple oblong holes at the positions corresponding to the bolt holes.

[0012] Furthermore, the elastic element is characterized as a compression spring.

[0013] Preferably, it also includes a stroke groove and a slider. The stroke groove is formed on the side wall of the outer sleeve and is formed along the sliding direction of the outer sleeve. The slider is fixed to the inner sleeve and forms a sliding fit with the stroke groove. The stroke of the slider is limited by the length of the stroke groove.

[0014] A chair includes the aforementioned lumbar support structure, and also includes a seat, a main backrest, and chair legs, wherein the main backrest is connected to the backrest frame, and the chair legs are connected to the seat.

[0015] One of the above technical solutions includes the following beneficial effects: The solution, through a guide structure and elastic element, enables the lumbar support to achieve an adaptive effect of horizontal push-back. The elastic element is directly positioned between the main lumbar support and the central mounting plate, with the main lumbar support corresponding to the central mounting plate. When pressure is applied to the lower back, the elastic element directly provides reverse elastic support to the main lumbar support, relieving lumbar pressure caused by prolonged sitting. Compared to flip-back, horizontal push-back does not produce deviations in the circumferential trajectory caused by different flip strokes. Attached Figure Description

[0016] Figure 1 This is a three-dimensional perspective view of a frontal view of one embodiment of the present invention; Figure 2 This is a three-dimensional perspective view of one embodiment of the present invention from the rear view. Figure 3 This is a schematic cross-sectional view of one embodiment of the present invention; Figure 4 yes Figure 3 A magnified view of a portion of the image.

[0017] Figure 5 yes Figure 2 A magnified view of a portion of point A in the middle.

[0018] The components include: lumbar support assembly 100, main lumbar support 110, secondary lumbar support 120, guide assembly 200, central mounting plate 210, side unfolding plate 220, sliding guide structure 300, inner sleeve 310, slider 311, outer sleeve 320, stroke groove 321, elastic element 400, stroke adjustment assembly 500, rotating block 510, screw 520, stroke block 530, stroke block guide groove 540, top cylinder 550, and height adjustment plate 600. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] like Figures 1-2 As shown, a lumbar support with an elastic device in the center includes a lumbar support assembly 100, a guide assembly 200, and an elastic element 400. The lumbar support assembly 100 includes a main lumbar support 110 and a secondary lumbar support 120 hinged to both sides of the main lumbar support 110. The guide assembly 200 includes a central mounting plate 210, side unfolding plates 220 and a sliding guide structure 300. The inner hinge ends of the two side unfolding plates 220 are respectively hinged to the two side ends of the central mounting plate 210, and the outer hinge ends of the two side unfolding plates 220 are respectively hinged to the outer hinge ends of the two auxiliary waist supports 120. The main lumbar support 110 and the middle mounting plate 210 are arranged opposite each other along the sliding direction. A sliding guide structure 300 is provided between the main lumbar support 110 and the middle mounting plate 210. An elastic element 400 is also provided between the main lumbar support 110 and the middle mounting plate 210.

[0021] The solution utilizes a guide structure in conjunction with an elastic element 400 to achieve an adaptive effect of horizontal push-back. The elastic element 400 is directly positioned between the main lumbar support 110 and the central mounting plate 210, with the main lumbar support 110 corresponding to the central mounting plate 210. When pressure is applied to the lower back, the elastic element 400 directly provides reverse elastic support to the main lumbar support 110, relieving lumbar spine pressure caused by prolonged sitting. Compared to flip-back, horizontal push-back does not produce deviations in the circumferential trajectory caused by different flip strokes.

[0022] like Figure 3 and Figure 4 The sliding guide structure 300 includes an inner sleeve 310 and an outer sleeve 320; The inner sleeve 310 is fixedly installed at the rear of the main waist support 110, and the outer sleeve 320 is fixedly installed on the side of the middle mounting plate 210 opposite to the main waist support 110. The inner sleeve 310 is slidably sleeved on the outer sleeve 320. The two ends of the elastic element 400 are respectively pressed against the bottom of the inner sleeve 310 and the bottom of the outer sleeve 320. When the main waist support 110 and the middle mounting plate 210 are in a naturally open state, the opposite ends of the inner sleeve 310 and the outer sleeve 320 are interlocked. When the main waist support 110 and the middle mounting plate 210 are close together, the middle to rear parts of the inner sleeve 310 and the outer sleeve 320 are interlocked.

[0023] The nested sliding fit between the inner sleeve 310 and the outer sleeve 320 forms a rigid guide channel, strictly limiting the movement direction of the main lumbar support 110, allowing it to move only back and forth along the axial direction of the inner sleeve 310 and the outer sleeve 320. Compared to simple slide rail or rod hole fits, the nested sleeve structure has a larger contact area, effectively resisting the lateral forces on the main lumbar support and ensuring that it is always aligned with the core lumbar support area, forming a stable fit with the auxiliary lumbar supports on both sides.

[0024] like Figure 4 As shown, it also includes a stroke adjustment component 500; the stroke adjustment component 500 includes a rotating block 510, a screw 520 and a stroke block 530; The inner cavity of the outer sleeve 320 is provided with a stroke block guide groove 540, the stroke block 530 is slidably accommodated in the stroke block guide groove 540, and the stroke block 530 and the screw 520 are threadedly engaged; The back of the main waist support 110 is provided with a top cylinder 550 opposite to the stroke block 530. Both the top cylinder 550 and the stroke block 530 are located in the inner ring of the elastic member 400, and the elastic member is accommodated in the cavity formed by the inner sleeve and the outer sleeve.

[0025] The threaded transmission structure of the rotating block 510, screw 520, and stroke block 530 allows for flexible adjustment of the maximum backward movement distance of the main lumbar support 110. When the rotating block 510 drives the screw 520 to rotate, the stroke block 530, which is threaded with the screw, moves axially along the guide groove of the outer sleeve 320. If the stroke block 530 is adjusted towards the main lumbar support, the top cylinder 550 on the back of the main lumbar support will contact the stroke block 530 earlier, limiting the backward movement of the main lumbar support and shortening the stroke. If the stroke block 530 is adjusted away from the main lumbar support, the backward movement space of the main lumbar support increases and the stroke is extended. In addition, the stroke adjustment component 500 indirectly changes the initial compression state of the elastic element 400, thereby adjusting the initial support force of the main lumbar support 110.

[0026] like Figure 4 As shown, the centers of the inner sleeve 310, outer sleeve 320, screw 520, stroke block 530 and top sleeve 550 are located on the same axis; The inner cavity cross-section of the travel block guide groove 540 is square, and the travel block 530 is provided with a square guide portion that matches the inner cavity cross-section of the guide groove.

[0027] To ensure the stability and guiding accuracy of structural movements.

[0028] In addition, it also includes a height adjustment plate 600; The back of the central mounting plate 210 is provided with multiple bolt holes, and the height adjustment plate is provided with multiple oblong holes at the positions corresponding to the bolt holes. The back of the central mounting plate is provided with multiple bolt holes, and the height adjustment plate is provided with multiple oblong holes at the positions corresponding to the bolt holes.

[0029] By engaging the bolt holes of the central mounting plate 210 with the oblong holes of the height adjustment plate, the height of the central mounting plate and the components integrated therewith can be adjusted up and down along the length of the oblong holes.

[0030] Furthermore, the elastic element 400 is a compression spring.

[0031] In addition, the sleeve includes a travel groove 321 and a slider 311. The travel groove 321 is opened on the side wall of the outer sleeve 320 and is opened in the direction of sliding of the outer sleeve 320. The slider 311 is fixed to the inner sleeve 310 and the slider 311 and the travel groove 321 form a sliding fit. The travel of the slider 311 is limited by the length of the travel groove 321.

[0032] The stroke groove is opened along the direction in which the outer sleeve 320 and the inner sleeve 310 slide relative to each other. The cooperation relationship formed with the slider can force the guide sleeve to only move linearly along the preset axis. In addition, through the stroke groove and the sliding stroke of the slider, the relative positional relationship between the inner sleeve 310 and the outer sleeve 320 can be limited, so that the inner sleeve 310 and the outer sleeve 320 maintain a sliding sleeve assembly relationship.

[0033] A chair includes the aforementioned lumbar support structure, and also includes a seat, a main backrest, and chair legs, wherein the main backrest is connected to the backrest frame, and the chair legs are connected to the seat.

[0034] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A lumbar support with an elastic device centered, characterized in that, Includes lumbar support components, guide components, and elastic elements; The lumbar support assembly includes a main lumbar support and secondary lumbar supports hinged to both sides of the main lumbar support; The guide assembly includes a central mounting plate, side unfolding plates, and a sliding guide structure. The inner hinge ends of the two side unfolding plates are respectively hinged to the two side ends of the central mounting plate, and the outer hinge ends of the two side unfolding plates are respectively hinged to the outer hinge ends of the two auxiliary waist supports. The main lumbar support and the middle mounting plate are arranged opposite each other along the sliding direction. A sliding guide structure is provided between the main lumbar support and the middle mounting plate, and an elastic element is also provided between the main lumbar support and the middle mounting plate.

2. The lumbar support with the elastic device centered according to claim 1, characterized in that, The sliding guide structure includes an inner sleeve and an outer sleeve; The inner sleeve is fixedly installed at the rear of the main lumbar support, and the outer sleeve is fixedly installed on the side of the middle mounting plate opposite to the main lumbar support. The inner sleeve is slidably sleeved on the outer sleeve. The two ends of the elastic element are respectively pressed against the bottom of the inner sleeve and the bottom of the outer sleeve. When the main waist support and the middle mounting plate are in a naturally open state, the opposite ends of the inner sleeve and the outer sleeve are interlocked. When the main waist support and the middle mounting plate are in a close state, the middle to the rear of the inner sleeve and the outer sleeve are interlocked.

3. The lumbar support with the elastic device centered according to claim 2, characterized in that, It also includes a stroke adjustment component; the stroke adjustment component includes a rotary block, a screw, and a stroke block; A rotating block is rotatably mounted at the center of the central mounting plate, and a screw is fixedly mounted on the rotating block and located inside the outer sleeve on the inner surface of the central mounting plate; The inner cavity of the outer sleeve is provided with a stroke block guide groove, the stroke block is slidably accommodated in the stroke block guide groove, and the stroke block and the screw are threadedly engaged; The back of the main lumbar support is provided with a top cylinder opposite to the stroke block. Both the top cylinder and the stroke block are located in the inner ring of the elastic element, which is housed in the cavity formed by the inner sleeve and the outer sleeve.

4. The lumbar support with the elastic device centered according to claim 3, characterized in that, The centers of the inner sleeve, outer sleeve, screw, stroke block and top sleeve are located on the same axis; The inner cavity of the guide groove of the stroke block is square, and the stroke block is provided with a square guide part that matches the inner cavity of the guide groove.

5. The lumbar support with the elastic device centered according to claim 4, characterized in that, It also includes a height adjustment plate; The back of the central mounting plate is provided with multiple bolt holes, and the height adjustment plate is provided with multiple oblong holes at the positions corresponding to the bolt holes.

6. The lumbar support with the elastic device centered according to claim 5, characterized in that, It also includes a stroke groove and a slider. The stroke groove is opened on the side wall of the outer sleeve and is opened in the direction of sliding of the outer sleeve. The slider is fixed to the inner sleeve and the slider and the stroke groove form a sliding fit. The stroke of the slider is limited by the length of the stroke groove.

7. The lumbar support with the elastic device centered according to any one of claims 1-6, characterized in that, The elastic element is a compression spring.

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