Adjustable chair back

Abstract

The utility model relates to the technical field of seats, in particular to an adjustable chair back which comprises a body, a supporting plate and an elastic piece, the elastic piece is installed between the body and the supporting plate, an adjusting assembly is arranged at the bottom of the supporting plate, the adjusting assembly comprises a rotating rod and a nut, the nut is fixedly installed at the bottom of the supporting plate, and the rotating rod is connected with the rotating rod. The rotating rod penetrates through the supporting plate and is in threaded connection with the nut, the bottom of the supporting plate can gradually get close to the chair back along with rotation of the screw, so that the elastic piece between the supporting plate and the chair back is extruded, the supporting force of the chair back to the spine is adjusted, the spine form and the sitting posture are corrected, adjustment is convenient, and use is comfortable.

Description

Technical Field

[0001] The utility model relates to the technical field of seats, in particular to an adjustable backrest. Background Art

[0002] As disclosed in the Chinese invention patent with the publication number of CN116831406A, an adjustable backrest structure is disclosed. By hinging and supporting an adjustment module between a backrest support and a first backrest mechanism, wherein the first adjustment mechanism adjusts the elastic support force of the first adjustment mechanism on the user by adjusting the compression amount of the elastic member A, and the second adjustment mechanism locks the sliding position of the shaft body by engaging with the shaft body, so as to realize the adjustment of the angle of the first backrest mechanism. This structure can adaptively adjust the backrest angle, the width of the support surface and the support force for users of different body types.

[0003] The problems existing in the prior art are: only the whole backrest is adjusted in direction, but the soft backrest fails to provide good support and correction for the cervical vertebrae in the vertical direction. Incorrect sitting postures for a long time will cause spinal deformation, and the backrest structure is complex, making disassembly, installation and maintenance inconvenient. Summary of the Utility Model

[0004] In order to solve the above technical problems, the purpose of the utility model is to provide a backrest that can well support the spine, is convenient to adjust and use.

[0005] The technical solution adopted by the utility model to solve the problem is: an adjustable backrest, comprising:

[0006] A body, a support plate and an elastic member. The support plate is vertically arranged in a plate shape, both ends of the support plate are installed on the body, and the elastic member is installed between the body and the support plate;

[0007] One end of the support plate is provided with an adjustment component, and one end of the support plate is adjustably connected to the body through the adjustment component, and the adjustment component is used to adjust the distance between one end of the support plate and the body.

[0008] As a further improvement of the above technical solution, the cross section of the elastic member is a polygon with an opening, and the elastic member has elasticity.

[0009] As a further improvement of the above technical solution, a groove extending in the front-rear direction is provided on the inner side wall of the elastic member, and the number of the grooves is multiple.

[0010] As a further improvement of the above technical solution, the elastic member is detachably connected to the support plate.

[0011] As a further improvement of the above technical solution, a fabric is provided on the front side of the body. A load-bearing plate is vertically installed on the fabric. The load-bearing plate is made of elastic plastic material, and the load-bearing plate and the elastic member are arranged corresponding to each other in the front and back directions.

[0012] As a further improvement of the above technical solution, the adjusting assembly includes a rotating rod and a nut. The rotating rod is provided with threads. The nut is fixedly installed at the bottom of the support plate. The rotating rod passes through the support plate and is screwed with the nut. The inner end of the rotating rod is rotatably connected to the bottom of the body.

[0013] As a further improvement of the above technical solution, the outer end of the rotating rod is fixedly connected with a knob, and the knob is located outside the support plate.

[0014] The beneficial effects of the present utility model are as follows: An adjusting assembly is provided at the bottom of the vertically installed support plate. The screw rod on the adjusting assembly cooperates with the nut inside the support plate. The bottom of the support plate can gradually approach the backrest as the screw rod rotates, thereby squeezing the elastic member between the support plate and the backrest, adjusting the supporting force of the backrest on the spine, correcting the spinal shape and sitting posture, with convenient adjustment and comfortable use. Description of the Drawings

[0015] The following further explains and illustrates the present utility model in conjunction with the description of the drawings and the specific embodiments.

[0016] Figure 1 is a structural schematic diagram of the present utility model;

[0017] Figure 2 is an exploded schematic diagram of the present utility model;

[0018] Figure 3 is a structural schematic diagram of the elastic member of the present utility model;

[0019] Figure 4 is a cross-sectional view of the present utility model;

[0020] Figure 5 is Figure 4 a cross-sectional view of.

[0021] In the figure: 1 - body, 2 - support plate, 3 - elastic member, 31 - groove, 4 - adjusting assembly, 41 - rotating rod, 42 - nut, 43 - knob, 5 - fabric, 6 - load-bearing plate. Specific Embodiments

[0022] This part will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The role of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but it cannot be construed as a limitation on the protection scope of the present utility model.

[0023] In the description of the present utility model, it should be understood that when it comes to orientation descriptions, such as the orientations or positional relationships indicated by up, down, front, back, left, right, etc., they are based on the orientations or positional relationships shown in the drawings. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0024] In the description of the present utility model, the meaning of "several" is one or more, the meaning of "multiple" is two or more, understandings such as "greater than", "less than", "exceeding", etc. do not include the recited number, and understandings such as "above", "below", "within", etc. include the recited number. If there is a description of "first", "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0025] In the description of the present utility model, unless otherwise clearly defined, terms such as "arrangement", "installation", "connection", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0026] Referring to Figures 1 to 3 , an adjustable backrest, comprising a main body 1, a support plate 2 is vertically installed on the rear side of the main body 1, and an elastic member 3 is provided between the main body 1 and the support plate 2.

[0027] The elastic member 3 has elasticity and a cross-section in the shape of a polygon with an opening. A plurality of grooves 31 extending in the front-back direction are provided on the inner side wall of the elastic member 3, and the elastic member 3 is detachably connected to the support plate 2. Preferably, the elastic member 3 and the support plate 2 can be connected by magnetic attraction or a snap connection.

[0028] A fabric 5 is provided on the front side of the main body 1, and a bearing plate 6 is vertically installed on the fabric 5. The bearing plate 6 is made of elastic plastic material, and the bearing plate 6 and the elastic member 3 are arranged corresponding to each other in the front-back direction.

[0029] Referring to Figures 4 to 5 , in a preferred embodiment, an adjusting assembly 4 is provided at the bottom of the support plate 2. The adjusting assembly 4 includes a screw rod 41 and a nut 42. The screw rod 41 is provided with threads, the nut 42 is fixedly installed at the bottom of the support plate 2, the screw rod 41 passes through the support plate 2 and is screwed with the nut 42, the inner end of the screw rod 41 is rotatably connected to the bottom of the main body 1, and the outer end of the screw rod 41 is fixedly connected with a knob 43, and the knob 43 is located outside the support plate 2.

[0030] The adjusting component 4 is used to adjust the distance between the bottom of the support plate 2 and the body 1. The screw rod 41 cooperates with the nut 42. As the knob 43 rotates, the bottom of the support plate 2 can gradually approach or move away from the body 1, controlling the extrusion and deformation degree of the support plate 2 on the support member, and precisely adjusting the backrest.

[0031] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. An adjustable backrest, characterized in that: It includes a body (1), a support plate (2) and an elastic member (3). The support plate (2) is vertically arranged in a plate shape. Both ends of the support plate (2) are installed on the body (1), and the elastic member (3) is installed between the body (1) and the support plate (2); One end of the support plate (2) is provided with an adjustment assembly (4). One end of the support plate (2) is adjustably connected to the body (1) through the adjustment assembly (4), and the adjustment assembly (4) is used to adjust the distance between one end of the support plate (2) and the body (1).

2. The adjustable backrest according to claim 1, characterized in that: The cross-section of the elastic member (3) is a polygon with an opening, and the elastic member (3) has elasticity.

3. The adjustable backrest according to claim 2, characterized in that: A groove body (31) extending in the front-rear direction is provided on the inner side wall of the elastic member (3), and the number of the groove bodies (31) is multiple.

4. The adjustable backrest according to claim 3, characterized in that: The elastic member (3) is detachably connected to the support plate (2).

5. The adjustable backrest according to claim 2, characterized in that: A fabric (5) is provided on the front side of the body (1). A bearing plate (6) is vertically installed on the fabric (5). The bearing plate (6) is made of elastic plastic material, and the bearing plate (6) is arranged corresponding to the elastic member (3) in the front-rear direction.

6. The adjustable backrest according to claim 1, characterized in that: The adjustment assembly (4) includes a rotating rod (41) and a nut (42). The rotating rod (41) is provided with threads. The nut (42) is fixedly installed at the bottom of the support plate (2). The rotating rod (41) passes through the support plate (2) and is screwed with the nut (42). The inner end of the rotating rod (41) is rotatably connected to the bottom of the body (1).

7. The adjustable backrest according to claim 6, characterized in that: The outer end of the rotating rod (41) is fixedly connected with a knob (43), and the knob (43) is located outside the support plate (2).

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