Waist rest and seat assembly

Abstract

The utility model provides a waist rest and a seat assembly. The waist rest comprises a front supporting face and a rear supporting face which are oppositely arranged in the first direction. The rear supporting face comprises a left side area and a right side area which are arranged in parallel, and the left side area and the right side area are the same in shape. The rear supporting face is provided with a plurality of concave structures extending inwards. And the plurality of sunken structures are symmetrically arranged about the joint of the left side area and the right side area. According to the waist cushion, the sunken structure is formed in the waist cushion, so that the weight of the waist cushion is reduced, meanwhile, the cushion feeling rebound resilience can be improved, the requirement for balancing the cushion feeling supporting performance and comfort is met, and the phenomenon that the waist cushion is too strong in single-dimension stress supporting is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lumbar support, in particular to a lumbar support and a seat assembly. BACKGROUND

[0002] As an important part of ergonomic seats, the structure design of the lumbar support directly affects the comfort of user's waist support and the convenience of product installation and positioning.

[0003] Traditional lumbar supports often use materials with large density to maintain support strength, which increases the overall weight of the lumbar support and affects the carrying and use experience. At the same time, materials with large density are difficult to meet the local resilience requirements, resulting in a stiff or insufficient support.

[0004] Therefore, it is necessary to design a lumbar support and a seat assembly to solve the above technical problems. CONTENT OF THE INVENTION

[0005] The present application provides a lumbar support and a seat assembly, which can reduce weight and improve the resilience of the support.

[0006] According to a first aspect of the embodiments of the present application, a lumbar support is provided, which comprises a front support surface and a rear support surface arranged opposite in a first direction; the rear support surface comprises a left side area and a right side area arranged side by side, the shapes of the left side area and the right side area are the same;

[0007] Wherein, a plurality of inwardly extending recessed structures are provided on the rear support surface; the plurality of recessed structures are symmetrically arranged about the connection of the left side area and the right side area.

[0008] Further, the shapes of the plurality of recessed structures are consistent; and / or,

[0009] The opening of the recessed structure gradually decreases inwardly from the rear support surface.

[0010] Further, the recessed structures are distributed in a dot matrix manner in the left side area and the right side area; and / or

[0011] The recessed structures are arranged across the left side area and the right side area.

[0012] Further, along the first direction, the recessed structure comprises a bottom surface facing the front support surface; along the first direction, the distance from the bottom surface to the front support surface is a support distance;

[0013] The support distances corresponding to the plurality of recessed structures are the same; or

[0014] The ratio of the support distances of the plurality of recessed structures is less than or equal to 1.5, and greater than or equal to 0.5; or

[0015] The lumbar support comprises a main support area for supporting the waist, and an edge support area located at the periphery, the support distance corresponding to the recess structure in the main support area is a first support distance, and the support distance corresponding to the recess structure in the edge support area is a second support distance, the first support distance being greater than the second support distance.

[0016] Further, the front support surface comprises a back support surface and a waist support surface connected in sequence; from the top end of the back support surface to the connection between the back support surface and the waist support surface, the thickness of the lumbar support gradually increases.

[0017] Further, the length of the waist support surface along a second direction is 120mm-150mm; and / or, the length of the waist support surface along a third direction is 80mm-120mm.

[0018] The second direction and the third direction are both perpendicular to the first direction.

[0019] Further, along the third direction, the protrusion height of the middle part of the waist support surface is higher than that of the two ends.

[0020] Further, the front support surface comprises a support body and two side support surfaces, the back support surface and the waist support surface form the support body; the two side support surfaces are respectively located at the two sides of the support body along a second direction; and the side support surfaces and the back support surface and the waist support surface smoothly transition.

[0021] The second direction is perpendicular to the first direction.

[0022] Further, along the first direction, the maximum length between the back support surface and the side support surface is a, and the maximum length between the back support surface and the waist support surface is b; a is greater than b, and the length difference between the two is 20mm-30mm.

[0023] Further, a plurality of convex points are arranged on the back support surface.

[0024] The plurality of convex points are symmetrically arranged about the middle part of the back support surface; and / or,

[0025] The convex points are planar or spherical; and / or

[0026] The convex points are integrally injection molded with the back support surface; and / or

[0027] From the top end of the back support surface to the connection between the back support surface and the waist support surface, the plurality of convex points are arranged in intervals and close to the edge of the back support surface.

[0028] Further, the lumbar support comprises a lumbar support body and a guide body; the front support surface and the rear support surface form the lumbar support body; the guide body is fixed at the bottom of the rear support surface, and the guide body protrudes to the side away from the front support surface along the first direction;

[0029] Wherein, the lowest point of the guide body is located at a first plane, and the lowest point of the front support surface is located at a second plane, and the first plane is above the second plane.

[0030] Further, the guide body extends along a second direction;

[0031] Along the first direction, the orthographic projection of the guide body is located in the orthographic projection of the lumbar support body;

[0032] The second direction is perpendicular to the first direction.

[0033] Further, along the first direction, the guide body comprises a connecting end and a guide end arranged oppositely; the connecting end is fixedly connected to the rear support surface;

[0034] The thickness of the guide body gradually decreases from the direction from the connecting end to the guide end; or

[0035] The thickness of the connecting end is greater than the thickness of the guide end.

[0036] Further, along the second direction, the top wall of the lumbar support forms a concave arc surface; and / or, along a third direction, the side wall of the lumbar support forms a concave arc surface;

[0037] The second direction and the third direction are both perpendicular to the first direction.

[0038] According to a second aspect of the embodiments of the present specification, a chair assembly is provided, comprising a chair and the lumbar support of the first aspect.

[0039] The present application has the following beneficial effects: the present application can reduce the weight of the lumbar support by providing a recess structure on the lumbar support, and can also improve the rebound elasticity of the lumbar support, achieve the balance between the support and comfort, and avoid the phenomenon of single-dimensional force support being too strong.

[0040] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present specification. BRIEF DESCRIPTION OF DRAWINGS

[0041] The drawings incorporated into the specification and forming a part thereof, illustrate embodiments consistent with the present specification and, together with the specification, serve to explain the principles of the present specification.

[0042] Figure 1 is a perspective view of a lumbar support of the present application;

[0043] Figure 2 is a front view of Figure 1 ;

[0044] Figure 3 is a rear view of Figure 1 ;

[0045] Figure 4 is a side view of Figure 1 ;

[0046] Figure 5 is a sectional view of Figure 1 .

[0047] BRIEF DESCRIPTION OF DRAWINGS

[0048] 10 - lumbar support body; 11 - front support surface; 111 - back support surface; 112 - lumbar support surface; 12 - rear support surface; 121 - left side area; 122 - right side area; 13 - concave structure; 131 - bottom surface; 14 - side support surface; 15 - convex point; 16a, 16b - curved surface;

[0049] 20 - guide body; 21 - connecting end; 22 - guide end. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments (or, “modes of implementation”) of the present application will be described clearly and completely herein with reference to the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated.

[0051] If the embodiments of the present application involve directional indications or positional relationships (for example, up, down, left, right, front, back, inner, outer, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such directional indications or positional relationships are only used to explain the relative positional relationships, movement conditions, etc. between the components in a certain specific posture (as shown in the drawings); if the specific posture changes, the directional indications or positional relationships also change accordingly. In addition, the embodiments of the present application involve the terms “first”, “second”, etc., which are only used for convenience of description and cannot be understood as indicating or implying relative importance.

[0052] Next, the embodiments of the present specification will be described in detail.

[0053] Referring to Figures 1-5As shown, the present application discloses a lumbar support, which comprises a lumbar support body 10 and a guide body 20. The lumbar support body 10 comprises a front support surface 11 and a rear support surface 12 arranged oppositely along a first direction. The guide body 20 is fixed at the bottom of the rear support surface 12, and the guide body 20 protrudes to the side away from the front support surface 11 along the first direction, so that the user can realize the fixation of the lumbar support body 10 by inserting the guide body 20 into the gap of the seat.

[0054] Along the vertical direction, the upper 1 / 3 of the lumbar support body 10 is defined as the upper part, the middle 1 / 3 is defined as the middle part, and the lower 1 / 3 is defined as the bottom part. Among them, the lower 1 / 3 of the lumbar support body 10 can be provided with the guide body 20.

[0055] The lumbar support body 10 is integrally injection molded with sponge. The sponge can be slow-rebound memory foam or high-rebound molded cotton. In this embodiment, high-rebound molded cotton is used, which uses slow-rebound polyurethane foam with a density of 45-60 kg / m³ and a porosity of more than 90%. In this way, the sponge can balance the air permeability and supportability while effectively supporting the waist. Among them, the height of the lumbar support body 10 is 360-420 mm to avoid the top shoulder phenomenon.

[0056] The front support surface 11 comprises a back support surface 111 and a waist support surface 112 connected in sequence. In order to ensure the stability of the structure of the waist support surface 112 and reduce the weight of the lumbar support body 10, the thickness of the lumbar support body 10 gradually increases from the top end of the back support surface 111 to the connection between the back support surface 111 and the waist support surface 112. The thickness of the top end of the back support surface 111 is 20-30 mm.

[0057] The length of the waist support surface 112 along the second direction is c, and the length of c is 120-150 mm to ensure that the width of the waist support surface 112 is greater than or equal to the width of the user's waist, so that the waist support surface 112 can fully wrap the user's waist.

[0058] The length of the waist support surface 112 along the third direction is 80-120 mm to ensure that the height of the waist support surface 112 is greater than or equal to the height of the user's waist, so that the waist support surface 112 can fully support the user's waist and avoid poor waist support. Among them, the second direction and the third direction are perpendicular to the first direction.

[0059] Along the third direction, the protrusion height of the middle part of the waist support surface 112 is higher than that of the two ends, and the horizontal cross section is C-shaped. In this way, when the user's waist leans on the lumbar support, the curved waist curve can be fitted with the protruding waist support surface 112, providing comfortable comfort.

[0060] The side surface of the back supporting surface 111 and the waist supporting surface 112, which are in contact with the user, is provided with a heating pad (not shown in the figure), so as to provide a warm supporting feeling in a cold environment. In other cases, the side surface of the back supporting surface 111 and the waist supporting surface 112, which are in contact with the user, can also be provided with a massage head (not shown in the figure), which can promote blood circulation and relieve strain.

[0061] The back supporting surface 12 includes a left area 121 and a right area 122 arranged side by side, and the shapes of the left area 121 and the right area 122 are the same. The back supporting surface 12 is provided with a plurality of inwardly extending recessed structures 13, and the plurality of recessed structures 13 are symmetrically arranged about the junction of the left area 121 and the right area 122. The design of the recessed structure 13 realizes weight reduction and improves the rebounding elasticity of the supporting feeling without affecting the supporting performance of the waist rest body 10, and also realizes the balance between the supporting feeling and comfort, and avoids the phenomenon of over-strong single-dimensional force support.

[0062] The plurality of recessed structures 13 are symmetrically arranged along the middle part of the back supporting surface 12. The shapes of the plurality of recessed structures 13 are consistent, such as the horizontal cross section of the recessed structure 13 being square, rhombus, rectangle, circle and the like. In the embodiment, the plurality of recessed structures 13 are distributed in a lattice pattern in the left area 121 and the right area 122. In other embodiments, the recessed structure 13 can span the left area 121 and the right area 122, and be arranged in a straight line, v shape or s shape.

[0063] The opening of the recessed structure 13 gradually decreases from the back supporting surface 12 inwardly, so as to facilitate the mold stripping of the recessed structure 13 after forming. The specific shape, number and position of the recessed structure 13 can be adjusted in combination with the size and softness of the waist rest body 10, and are not limited herein.

[0064] In the first direction, the recessed structure 13 includes a bottom surface 131 facing the front supporting surface 11. In the first direction, the distance from the bottom surface 131 to the front supporting surface 11 is a supporting distance, and the supporting distances corresponding to the plurality of recessed structures 13 are the same, so as to ensure that the supporting properties at each recessed structure 13 of the waist rest are consistent. In another embodiment, the ratio of the supporting distances of the plurality of recessed structures 13 is less than or equal to 1.5, and greater than or equal to 0.5.

[0065] In another embodiment, as Figure 5As shown, the lumbar support body 10 includes a main support area for supporting the waist, and an edge support area located at the periphery. The support distance corresponding to the recess structure 13 located in the main support area is a first support distance f, and the support distance corresponding to the recess structure 13 located in the edge support area is a second support distance e. The first support distance f is greater than the second support distance e. In this way, by increasing the thickness of the lumbar support area, the stability of the lumbar support body 10 structure is ensured.

[0066] The lumbar support body 10 also includes two side support surfaces 14. The back support surface 111 and the waist support surface 112 form a support body, and the two side support surfaces 14 are located on both sides of the support body along the second direction. Moreover, the side support surfaces 14 are smoothly connected with the back support surface 111 and the waist support surface 112, so as to wrap the waist of the user and protect the waist from tilting and deviation.

[0067] In another embodiment, an adjustable ratchet is installed at the connection between the side support surface 14 and the support body. In this way, the distance between the two side support surfaces 14 and the support body can be adjusted, and the size of the lumbar support area surrounded by the side support surface 14 and the support body can be changed, so as to meet the use requirements of different users.

[0068] Along the first direction, the maximum length between the back support surface 111 and the side support surface 14 is a, and the maximum length between the back support surface 111 and the waist support surface 112 is b. a is greater than b, and the length difference between them is 20-30 mm, so as to avoid the phenomenon that the two side support surfaces 14 have no wrapping feeling.

[0069] A plurality of protrusions 15 are arranged on the back support surface 111. The plurality of protrusions 15 are arranged in a spaced manner and close to the edge of the back support surface 111 from the top end of the back support surface 111 to the connection between the back support surface 111 and the waist support surface 112. In this way, the plurality of protrusions 15 increase the first leaning comfort of the human body after leaning without affecting the support performance of the lumbar support body 10, and have certain ventilation, perspiration and massage functions.

[0070] In this embodiment, the protrusions 15 are arranged at a distance of 65 mm from the center on both sides of the middle part of the back support surface 111. The plurality of protrusions 15 are arranged in a spaced manner along the vertical direction and are symmetrically arranged about the middle part of the back support surface 111. The number and position of the protrusions 15 can be adjusted according to the size of different lumbar support bodies 10, which is not limited here.

[0071] The protrusions 15 are in a planar or spherical shape. The protrusions 15 are integrally injection molded with the back support surface 111, so as to improve the stability of the position of the protrusions 15. In some cases, the protrusions 15 can also be detachably installed on the back support surface 111, such as adhesion, so as to meet the needs of adjusting the position of the protrusions 15 in different situations.

[0072] In the second direction, the top wall of the lumbar support body 10 is formed with a concave arc surface 16a to fit the user's scapular line. In the third direction, the side wall of the lumbar support body 10 is formed with a concave arc surface 16b to fit the user's waist line.

[0073] The guide body 20 is integrally injection molded with the lumbar support body 10 to improve the stability of the guide body 20 on the guide body 20. In some cases, the guide body 20 can also be detachably mounted on the lumbar support body 10, such as adhesion, to meet the needs of position adjustment of the guide body 20 in different cases.

[0074] The horizontal plane where the lowest point of the guide body 20 is located is a first plane, and the horizontal plane where the lowest point of the front support surface 11 is located is a second plane. The first plane is above the second plane. In this way, the lumbar support body 10 and the guide body 20 are concave transitioned, so that when the guide body 20 is fixed on the seat, the height of the top waist point of the lumbar support will not be raised.

[0075] The guide body 20 is arranged to extend in the second direction. In the first direction, the orthographic projection of the guide body 20 is located within the orthographic projection of the lumbar support body 10. In this embodiment, the orthographic projection of the guide body 20 is smaller than the orthographic projection of the lumbar support body 10, so that the guide body 20 can be hidden by the lumbar support body 10, which is more beautiful.

[0076] Specifically, in the first direction, the guide body 20 includes oppositely arranged connecting end 21 and guide end 22. The connecting end 21 is fixedly connected to the rear support surface 12. In the direction from the connecting end 21 to the guide end 22, the thickness of the guide body 20 gradually decreases. Or the thickness of the connecting end 21 is greater than the thickness of the guide end 22. In this way, the smaller size of the guide end 22 can play a guiding role, reducing the alignment time of inserting the guide body 20 into the gap between the backrest and the seat cushion.

[0077] The application also discloses a seat assembly, which comprises a seat and a lumbar support. The seat comprises a backrest and a seat cushion, and the guide body 20 extends into the gap between the backrest and the seat cushion. The seat mentioned here can refer to a sofa, a car seat, or a functional chair, etc., which is not limited in detail here.

[0078] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of the present application is not limited to the precise structure described in the above embodiments and shown in the drawings; any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A lumbar support, characterized in that, It includes a front support surface and a rear support surface arranged opposite each other along a first direction; the rear support surface includes a left side region and a right side region arranged side by side, the left side region and the right side region having the same shape; The rear support surface is provided with a plurality of inwardly extending recessed structures; the plurality of recessed structures are symmetrically arranged about the connection between the left and right regions; the lumbar support includes a lumbar support body and a guide body; the front support surface and the rear support surface form the lumbar support body; the guide body is fixed to the bottom of the rear support surface, and the guide body protrudes along the first direction to the side away from the front support surface; Wherein, the horizontal plane at the lowest point of the guide body is the first plane, the horizontal plane at the lowest point of the front support surface is the second plane, and the first plane is located above the second plane.

2. The lumbar support according to claim 1, characterized in that, The multiple recessed structures have the same shape; and / or, The opening of the recessed structure gradually decreases inward from the rear support surface.

3. The lumbar support according to claim 1, characterized in that, The recessed structures are distributed in a lattice pattern in the left and right regions; and / or The recessed structure is provided across the left and right regions.

4. The lumbar support according to claim 3, characterized in that, Along the first direction, the recessed structure includes a bottom surface facing the front support surface; along the first direction, the distance from the bottom surface to the front support surface is the support distance; The support distances corresponding to multiple recessed structures are the same; or The ratio of the support distances of the plurality of said recessed structures is less than or equal to 1.5, and greater than or equal to 0.5; or The lumbar support includes a main support area for supporting the waist and an edge support area located on the periphery. The support distance corresponding to the recessed structure in the main support area is the first support distance, and the support distance corresponding to the recessed structure in the edge support area is the second support distance. The first support distance is greater than the second support distance.

5. The lumbar support according to claim 1, characterized in that, The front support surface includes a back support surface and a lumbar support surface connected in sequence; the thickness of the lumbar support gradually increases from the top of the back support surface to the connection between the back support surface and the lumbar support surface.

6. The lumbar support according to claim 5, characterized in that, The length of the lumbar support surface along the second direction is 120mm-150mm; and / or, the length of the lumbar support surface along the third direction is 80mm-120mm; The second direction and the third direction are both perpendicular to the first direction.

7. The lumbar support according to claim 5, characterized in that, Along the third direction, the height of the protrusion in the middle of the waist support surface is higher than the height of the protrusion at both ends.

8. The lumbar support according to claim 5, characterized in that, The front support surface includes a support body and two side support surfaces, the back support surface and the waist support surface form the support body; the two side support surfaces are respectively located on both sides of the support body along the second direction; and the side support surfaces smoothly transition with the back support surface and the waist support surface. The second direction is perpendicular to the first direction.

9. The lumbar support according to claim 8, characterized in that, Along the first direction, the maximum length between the back support surface and the side support surface is a, and the maximum length between the back support surface and the waist support surface is b; a is greater than b, and the length difference between the two is 20mm-30mm.

10. The lumbar support according to claim 5, characterized in that, Multiple protrusions are provided on the back support surface; The plurality of protrusions are symmetrically arranged about the center of the back support surface; and / or, The protrusions are planar or spherical; and / or The protrusions are integrally injection molded with the back support surface; and / or The plurality of protrusions are arranged at intervals and close to the edge of the back support surface, from the top of the back support surface to the junction of the back support surface and the waist support surface.

11. The lumbar support according to claim 1, characterized in that, The guide body extends along the second direction; Along the first direction, the orthographic projection of the guide body lies within the orthographic projection of the lumbar support body; The second direction is perpendicular to the first direction.

12. The lumbar support according to claim 1, characterized in that, Along the first direction, the guide body includes a connecting end and a guide end disposed opposite to each other; the connecting end is fixedly connected to the rear support surface; The thickness of the guide body gradually decreases from the connecting end to the guide end; or The thickness of the connecting end is greater than the thickness of the guiding end.

13. The lumbar support according to claim 1, characterized in that, Along the second direction, the top wall of the lumbar support forms a concave arc surface; and / or, along the third direction, the side wall of the lumbar support forms a concave arc surface; The second direction and the third direction are both perpendicular to the first direction.

14. A seating assembly, characterized in that, Includes seating and lumbar support as described in any one of claims 1-13.

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