A lumbar support having elastic means arranged on both sides

Abstract

The utility model provides a waist rest of two sides arrangement elasticity device, including elastic component and waist rest component, the waist rest component includes main waist rest and the vice waist rest of hinged to the both sides of main waist rest, the elastic component includes middle installation board, side unfolding board and torsional spring, and the inner hinged end of two side unfolding boards is hinged with the both sides end of middle installation board respectively, and the hinged axle sleeve of two side unfolding boards and middle installation board is equipped with the spring ring of torsional spring, and the two force arms of torsional spring are respectively in close contact to middle installation board and side unfolding board, and the outer hinged end of two side unfolding boards is hinged with the outer hinged part of two vice waist rests respectively, the utility model discloses the purpose lies in proposing a waist rest of two sides arrangement elasticity device, and the three -dimensional support structure of left middle right waist rest constitutes cooperation elastic piece, and constitutes the waist rest of having elastic self -adaptation function.

Description

Technical Field

[0001] This utility model relates to the field of seating, and in particular to a lumbar support with elastic devices arranged on both sides. Background Technology

[0002] The elastic lumbar support of a chair is one of the core functional components of a modern ergonomic chair. Its main function is to conform to the natural physiological curvature of the human lumbar spine (lumbar lordosis curve) through an elastic support structure, fill the gap between the waist and the seat when sitting, relieve lumbar pressure, and avoid lumbar muscle tension, strain or lumbar spine deformation caused by long-term sitting.

[0003] Lumbar supports come in two types: fixed and movable. The common fixed structure is a lumbar support block that is fixedly assembled with the chair body. This type of structure has poor adaptability and is not suitable for most people. On the other hand, a movable lumbar support can be adjusted according to the user's needs, making it more comfortable to use.

[0004] Common types of active lumbar supports include elastic support and airbag support. Airbag support relies on the elasticity of gas, while elastic support relies on the elastic force provided by elastic components. Due to the increased complexity of the overall structure, elastic lumbar supports are not provided on both sides, resulting in blind spots in the lumbar support on both sides. To improve user comfort, a lumbar support that provides elastic support from the left and right sides and the middle can be developed to create a three-dimensional support effect, which can more comprehensively protect the lumbar spine. Utility Model Content

[0005] To address the aforementioned shortcomings, the purpose of this utility model is to propose a lumbar support with elastic devices arranged on both sides. This device, consisting of a three-dimensional support structure formed by left, middle, and right lumbar supports, combined with elastic elements, constitutes a lumbar support with elastic self-adaptive function.

[0006] To achieve this objective, the present invention adopts the following technical solution: A lumbar support with elastic devices arranged on both sides includes an elastic component and a lumbar support component; the lumbar support component includes a main lumbar support and secondary lumbar supports hinged to both sides of the main lumbar support; The elastic component includes a central mounting plate, side unfolding plates, and torsion springs, with the inner hinged ends of the two side unfolding plates respectively hinged to the two side ends of the central mounting plate. The hinge pins of the two side expansion plates and the central mounting plate are fitted with the spring coils of the torsion springs, and the two lever arms of the torsion springs are respectively pressed against the central mounting plate and the side expansion plates; The outer hinge ends of the two side expansion plates are respectively hinged to the outer hinge parts of the two auxiliary waist supports.

[0007] Preferably, it also includes a guide assembly, which includes a guide cylinder and a guide sleeve; The central mounting plate is semi-enclosed, and a guide sleeve is provided at the center of the concave surface of the central mounting plate; the main waist support is provided with a guide cylinder adapted to the guide sleeve on the side facing the central mounting plate, and the guide cylinder is slidably sleeved on the outside of the guide sleeve.

[0008] Preferably, the guide cylinder and the guide sleeve have the same cross-sectional shape, and the cross-sectional shape of the guide cylinder is polygonal.

[0009] Ideally, it should also include a travel adjustment component; The stroke adjustment assembly includes a rotating block, a screw, and a stroke block. The rotating block is rotatably mounted at the center of the central mounting plate. The screw is fixedly mounted on the rotating block and passes through the central mounting plate into the guide sleeve. The stroke block is slidably accommodated in the inner cavity of the guide cylinder. The stroke block and the screw are threadedly engaged. The inner cavity of the guide sleeve is provided with a blocking structure near the main waist support.

[0010] Furthermore, the centers of the screw, guide sleeve, stroke block, and guide cylinder are located on the same axis; The guide sleeve, the stroke block, and the guide cylinder have the same polygonal cross-section. The stroke block is slidably accommodated in the guide cylinder, and the guide cylinder is slidably accommodated in the guide sleeve.

[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] Preferably, the system also includes a travel groove and a slider. The travel groove is formed on the side wall of the guide cylinder and is formed along the sliding direction of the guide cylinder. The slider is fixed to the guide sleeve, and the slider and the travel groove form a sliding fit. The travel of the slider is limited by the length of the travel groove.

[0013] 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.

[0014] One of the above technical solutions includes the following beneficial effects: the side lumbar supports are hinged to the central mounting plate via side unfolding plates. Combined with the elastic force of torsion springs, the opening angle can automatically adjust according to the contours and pressure on the user's waist. When the waist is pressed against the wall, the side lumbar supports will conform to the sides of the waist under the reaction force of the torsion springs, forming a wraparound support, enhancing the feeling of being wrapped around the waist, creating a three-dimensional support effect, and providing more comprehensive protection for the waist. Attached Figure Description

[0015] 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; Figure 5 yes Figure 1 A magnified view of a portion of point A in the middle.

[0016] The components include: elastic component 100, central mounting plate 110, side unfolding plate 120, torsion spring 130, inner hinge end 121, outer hinge end 122, lumbar support component 200, main lumbar support 210, secondary lumbar support 220, guide component 300, guide cylinder 310, slider 311, guide sleeve 320, slider 321, blocking structure 330, height adjustment plate 400, rotating block 410, screw 420, and stroke block 430. Detailed Implementation

[0017] 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.

[0018] like Figure 1 and Figure 2 As shown, a lumbar support with elastic devices arranged on both sides includes an elastic component 100 and a lumbar support component 200; the lumbar support component 200 includes a main lumbar support 210 and a secondary lumbar support 220 hinged to both sides of the main lumbar support 210. The elastic component 100 includes a central mounting plate 110, side unfolding plates 120 and a torsion spring 130, with the inner hinge ends 121 of the two side unfolding plates 120 respectively hinged to the two side ends 111 of the central mounting plate 110. The hinge pins of the two side unfolding plates 120 and the central mounting plate 110 are fitted with the spring rings of the torsion spring 130, and the two lever arms of the torsion spring 130 respectively abut against the central mounting plate 110 and the side unfolding plates 120. The outer hinge ends 122 of the two side unfolding plates 120 are respectively hinged to the outer hinge parts of the two auxiliary waist supports 220.

[0019] The side lumbar supports 220 are hinged to the central mounting plate 110 via side unfolding plates 120. Combined with the elastic force of the torsion springs 130, they can automatically adjust their opening angle according to the contours and pressure on the user's waist. When the waist is pressed against the wall, the side lumbar supports 220 will conform to the sides of the waist under the reaction force of the torsion springs 130, forming a wraparound support, enhancing the feeling of being wrapped around the waist, creating a three-dimensional support effect, and providing more comprehensive protection for the waist.

[0020] like Figure 3 and Figure 4 As shown, it also includes a guide assembly 300, which includes a guide cylinder 310 and a guide sleeve 320; The central mounting plate 110 is semi-enclosed, and a guide sleeve 320 is provided at the center of the concave surface of the central mounting plate 110; the main waist support 210 is provided with a guide cylinder 310 adapted to the guide sleeve 320 on the side facing the central mounting plate 110, and the guide cylinder 310 is slidably sleeved on the outside of the guide sleeve 320.

[0021] The sliding fit between the guide sleeve 320 and the guide cylinder 310 provides stable axial guidance for the main lumbar support 210 in the front-to-back direction. When pressure is applied to the waist, the main lumbar support 210 can only slide along the axis of the guide sleeve 320, avoiding lateral deviation or torsion caused by uneven force, ensuring that the main lumbar support is always aligned with the core support area of ​​the waist, and cooperating with the auxiliary lumbar supports 220 on both sides to form a relatively balanced support effect.

[0022] like Figure 4 As shown, the guide cylinder 310 and the guide sleeve 320 have the same cross-sectional shape, and the cross-sectional shape of the guide cylinder 310 is polygonal.

[0023] This design prevents relative rotation between the guide cylinder 310 and the guide sleeve 320, thus improving structural stability.

[0024] like Figure 4 As shown, it also includes a travel adjustment component 400; The stroke adjustment assembly 400 includes a rotating block 410, a screw 420, and a stroke block 430. The rotating block 410 is rotatably mounted at the center of the central mounting plate 110. The screw 420 is fixedly mounted on the rotating block 410 and passes through the central mounting plate 110 into the guide sleeve 320. The stroke block 430 is slidably accommodated in the inner cavity of the guide sleeve 310. The stroke block and the screw are threadedly engaged. The inner cavity of the guide sleeve 320 is provided with a blocking structure 330 near the main waist support 210.

[0025] The rotating block 410 drives the screw 420 to rotate, which in turn drives the stroke block 430 to move axially within the guide cylinder 310, changing the relative position of the stroke block 430 and the blocking structure 330 on the guide sleeve 320. When the main lumbar support 210 moves backward under lumbar pressure, the stroke block 430 is limited by the blocking structure 330, thereby controlling the maximum backward movement distance of the main lumbar support 210 and adjusting the front and rear support depth of the lumbar support to meet the personalized needs of different users for lumbar support strength and protrusion.

[0026] Furthermore, the centers of the screw 420, guide sleeve 320, stroke block 430 and guide cylinder 310 are located on the same axis; The guide sleeve 320, the stroke block 430 and the guide cylinder 310 have the same polygonal structure in cross-section. The stroke block 430 is slidably accommodated in the guide cylinder 310 and the guide cylinder 310 is slidably accommodated in the guide sleeve 320.

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

[0028] In addition, it also includes a height adjustment plate 400; 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. The back of the central mounting plate 110 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 110 with the oblong holes of the height adjustment plate, the height of the guide plate and the components integrated therewith can be adjusted up and down along the length of the oblong holes.

[0030] It also includes a travel groove 311 and a slider 321. The travel groove 311 is opened on the side wall of the guide cylinder 310 and the travel groove 311 is opened in the sliding direction of the guide cylinder 310. The slider 321 is fixed to the guide sleeve 320 and the slider 321 and the travel groove 311 form a sliding fit. The travel of the slider 321 is limited by the length of the travel groove 311.

[0031] The stroke groove is opened along the direction in which the guide cylinder 310 and the guide sleeve 320 slide relative to each other. The cooperation relationship formed with the slider can force the guide sleeve to only make linear movements along a preset axis. In addition, the relative positional relationship between the guide cylinder 310 and the guide sleeve 320 can be limited by the stroke groove and the sliding stroke of the slider, so that the guide cylinder 310 and the guide sleeve 320 maintain a sliding sleeve assembly relationship.

[0032] 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.

[0033] 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 elastic devices arranged on both sides, characterized in that, It includes an elastic component and a lumbar support component; the lumbar support component includes a main lumbar support and secondary lumbar supports hinged to both sides of the main lumbar support; The elastic component includes a central mounting plate, side unfolding plates, and torsion springs, with the inner hinged ends of the two side unfolding plates respectively hinged to the two side ends of the central mounting plate. The hinge pins of the two side expansion plates and the central mounting plate are fitted with the spring coils of the torsion springs, and the two lever arms of the torsion springs are respectively pressed against the central mounting plate and the side expansion plates; The outer hinge ends of the two side expansion plates are respectively hinged to the outer hinge parts of the two auxiliary waist supports.

2. The lumbar support with elastic devices arranged on both sides according to claim 1, characterized in that, It also includes a guide assembly, which comprises a guide cylinder and a guide sleeve; The central mounting plate is semi-enclosed, and a guide sleeve is provided at the center of the concave surface of the central mounting plate; the main waist support is provided with a guide cylinder adapted to the guide sleeve on the side facing the central mounting plate, and the guide cylinder is slidably sleeved on the outside of the guide sleeve.

3. The lumbar support with elastic devices arranged on both sides according to claim 2, characterized in that, The guide cylinder and the guide sleeve have the same cross-sectional shape, and the cross-sectional shape of the guide cylinder is polygonal.

4. The lumbar support with elastic devices arranged on both sides according to claim 3, characterized in that, It also includes a travel adjustment component; The stroke adjustment assembly includes a rotating block, a screw, and a stroke block. The rotating block is rotatably mounted at the center of the central mounting plate. The screw is fixedly mounted on the rotating block and passes through the central mounting plate into the guide sleeve. The stroke block is slidably accommodated in the inner cavity of the guide cylinder. The stroke block and the screw are threadedly engaged. The inner cavity of the guide sleeve is provided with a blocking structure near the main waist support.

5. The lumbar support with elastic devices arranged on both sides according to claim 4, characterized in that, The centers of the screw, guide sleeve, stroke block, and guide cylinder are located on the same axis; The guide sleeve, the stroke block, and the guide cylinder have the same polygonal cross-section. The stroke block is slidably accommodated in the guide cylinder, and the guide cylinder is slidably accommodated in the guide sleeve.

6. The lumbar support with elastic devices arranged on both sides according to claim 5, 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.

7. The lumbar support with elastic devices arranged on both sides according to claim 6, characterized in that, It also includes a stroke slot and a slider. The stroke slot is opened on the side wall of the guide cylinder and is opened in the direction of sliding of the guide cylinder. The slider is fixed to the guide sleeve and the slider and the stroke slot form a sliding fit. The stroke of the slider is limited by the length of the stroke slot.

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