Chair with waist support

Abstract

The utility model relates to the technical field of chairs, in particular to a chair with a waist support, which comprises a seat and a backup plate fixedly connected with the seat, a movable groove is arranged outside the backup plate in a penetrating manner, a horizontal groove is arranged on the upper end face of the seat corresponding to the movable groove, four corners of the bottom of the seat are fixedly connected with support legs, and the waist support is fixedly connected with the support legs. A waist supporting plate is movably connected into the movable groove, a pressing plate is fixedly connected to the bottom of the waist supporting plate, the pressing plate corresponds to the horizontal groove and is matched with the horizontal groove, and the waist supporting plate and the pressing plate are integrally formed. According to the chair with the waist support, when the human body sits on the surface of the chair under the gravity, the pressing plate is extruded, the waist support is driven to overturn forwards in the movable groove and abut against the waist of a user, supporting force is provided for the waist of the user, and therefore the use efficiency of the chair is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of chairs, and in particular relates to a chair with a lumbar support. Background Art

[0002] Chairs are a type of furniture used extensively in daily life and work. They are generally composed of a base, backrest, support structure, armrests, and other components. To meet people's diverse needs and provide a more comfortable experience, the structure and functionality of chairs are constantly being improved. Currently, more and more chairs are being equipped with lumbar supports to provide excellent support for the waist. However, during use, users sit in different positions on the chair. Some sit relatively forward, while the lumbar support is fixed in place. Consequently, the lumbar support cannot fit snugly against the user's waist, significantly reducing its effectiveness. Utility Model Content

[0003] The purpose of the present utility model is to provide a chair with a lumbar support. The chair with a lumbar support designed in the present application utilizes the body's own gravity to squeeze the pressing plate when sitting on the chair surface, driving the lumbar support to flip forward in the movable groove and rest against the user's waist, thereby providing the user with lumbar support, thereby improving the efficiency of the device and solving the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: a chair with a lumbar support, comprising a seat and a backrest fixedly connected to the seat, a movable groove is provided through the outside of the backrest, a horizontal groove is provided on the upper end surface of the seat corresponding to the movable groove, support legs are fixedly connected at the four corners of the bottom of the seat, a lumbar support plate is movably connected in the movable groove, a pressing plate is fixedly connected to the bottom of the lumbar support plate, and the pressing plate corresponds to the horizontal groove and fits in with the lumbar support plate and the pressing plate is integrated into a whole.

[0005] Preferably, the lower end surfaces of the lumbar support plate and the pressing plate are fixedly connected to a connecting block 1, and one side of the connecting block 1 is movably connected to a connecting block 2.

[0006] Preferably, the connecting block 1 and the connecting block 2 are two groups symmetrically distributed in the movable groove.

[0007] Preferably, a connecting shaft is provided between the two groups of connecting blocks 1 and 2, and the connecting shaft is fixedly connected to the connecting block 2 and rotatably connected to the connecting block 1.

[0008] Preferably, a torsion spring is sleeved on the outside of the connecting shaft, and one end of the torsion spring is fixed to the pressing plate, and the other end is fixed to the inner wall of the movable groove.

[0009] Preferably, the waist support plate is designed in S shape, and the waist support plate and the pressing plate are made of high-density polyethylene by injection molding.

[0010] Compared with the prior art, the chair with a waist support has the advantages that when a user sits on the chair, the user's body weight presses the pressing plate, drives the waist support plate to turn forward in the movable groove, and supports the user's waist, thereby improving the use efficiency of the chair. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a perspective view of the whole structure of the chair with a waist support according to the present application;

[0012] Figure 2 It is a rear view of the whole structure of the chair with a waist support according to the present application;

[0013] Figure 3 It is a bottom view of the whole structure of the chair with a waist support according to the present application;

[0014] Figure 4 It is a perspective view of the whole structure of the chair with a waist support according to the present application; Figure 3 It is an enlarged view of part A in the chair with a waist support according to the present application.

[0015] LEGEND:

[0016] 1, seat; 2, backrest; 3, waist support plate; 4, horizontal groove; 5, pressing plate; 6, support leg; 7, movable groove; 8, connecting block one; 9, connecting block two; 10, connecting shaft; 11, torsion spring. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0018] Please refer to Figures 1-4 The present application provides a technical solution:

[0019] The chair with a waist support comprises a seat 1 and a backrest 2 fixedly connected with the seat 1. A movable groove 7 is formed through the outside of the backrest 2. A horizontal groove 4 is formed in the upper end surface of the seat 1 at a position corresponding to the movable groove 7. Support legs 6 are fixedly connected to the bottom corners of the seat 1. A waist support plate 3 is movably connected in the movable groove 7. A pressing plate 5 is fixedly connected to the bottom of the waist support plate 3 and corresponds to and matches the horizontal groove 4. The waist support plate 3 and the pressing plate 5 are integrally formed.

[0020] Preferably, the lower end surface of the waist supporting plate 3 and the pressing plate 5 is fixedly connected with a connecting block one 8, and one side of the connecting block one 8 is movably connected with a connecting block two 9.

[0021] Specifically, the connecting block one 8 and the connecting block two 9 are two groups of symmetrically distributed in the movable groove 7.

[0022] Specifically, the connecting shaft 10 is arranged through the two groups of connecting block one 8 and the connecting block two 9, and the connecting shaft 10 is fixedly connected with the connecting block two 9 and movably connected with the connecting block one 8.

[0023] Specifically, the connecting shaft 10 is externally sleeved with a torsional spring 11, one end of the torsional spring 11 is fixed with the pressing plate 5, and the other end is fixed with the inner wall of the movable groove 7, and the elastic potential of the torsional spring 11 is used to ensure the resetting of the pressing plate 5 and the waist supporting plate 3 in the subsequent use process.

[0024] Specifically, the waist supporting plate 3 is designed in an S-shaped structure, and the waist supporting plate 3 and the pressing plate 5 are made of high-density polyethylene injection molding, and the S-shaped structure of the waist supporting plate 3 is more in line with ergonomics and better fits the bending arc line of the user's waist.

[0025] Working principle:

[0026] In work, the user is on the surface of the seat 1, at this time, under the action of the gravity of the human body itself, the buttocks contact the pressing plate 5, and the pressing plate 5 is extruded into the horizontal groove 4, the surface of the pressing plate 5 is flush with the surface of the seat 1, and the user does not feel uncomfortable, and when the pressing plate 5 is pressed, the waist supporting plate 3 fixed with the pressing plate 5 drives the connecting shaft 10 to deflect in the movable groove 7 through the fixed block two, and then the connecting shaft 10 drives the torsional spring 11 to compress the elastic potential in the deflection process, and at this time, the waist supporting plate 3 is pressed against the user's waist.

[0027] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A chair with a lumbar support, comprising a seat (1) and a backrest (2) fixedly connected to the seat (1), characterized in that, The outer part of the backrest (2) is provided with a movable slot (7), the upper end surface of the seat (1) is provided with a horizontal slot (4) at the corresponding position of the movable slot (7), the bottom corners of the seat (1) are fixedly connected with supporting legs (6), the movable slot (7) is movably connected with a waist support plate (3), the bottom of the waist support plate (3) is fixedly connected with a pressing plate (5), and the pressing plate (5) corresponds to and matches the waist support plate (3) and the pressing plate (5) are integrally formed.

2. A chair having a lumbar support according to claim 1, wherein, The lower end surface of the waist support plate (3) and the pressing plate (5) is fixedly connected with a connecting block one (8), and one side of the connecting block one (8) is movably connected with a connecting block two (9).

3. A chair having a lumbar support according to claim 2, wherein, The connecting block one (8) and the connecting block two (9) are symmetrically distributed in the movable slot (7).

4. A chair having a lumbar support according to claim 3, wherein, The connecting block one (8) and the connecting block two (9) are symmetrically distributed in the movable slot (7).

5. A chair having a lumbar support according to claim 4, wherein, The connecting block one (8) and the connecting block two (9) are symmetrically distributed in the movable slot (7).

6. A chair having a lumbar support according to claim 5, wherein, The connecting block one (8) and the connecting block two (9) are symmetrically distributed in the movable slot (7). The connecting block one (8) and the connecting block two (9) are symmetrically distributed in the movable slot (7). The waist support plate (3) is designed in an S-shaped structure, and the waist support plate (3) and the pressing plate (5) are made of high-density polyethylene injection molding.

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