Office chair with liftable backrest

Abstract

The utility model provides an office chair with a liftable backrest, which comprises a chair seat and a backrest, the lower part of the backrest is provided with a raised sponge cushion, the bottom of the chair seat is fixedly provided with a support shell, the rear side wall of the support shell is provided with a radian support plate in an extending manner, and the top of the radian support plate is connected with a rubber shell plate positioned on the rear side of the chair seat; the inclination of the rubber shell plate is the same as the bending radian of the back side wall of the backrest, the rubber shell plate is not connected with the backrest, a first air pressure telescopic supporting piece is further installed on the lower side wall of the supporting plate, and the telescopic end of the first air pressure telescopic supporting piece is connected with the lower portion of the back side wall of the backrest. According to the office chair with the liftable backrest, disclosed by the utility model, the backrest is driven to ascend and descend through the first air pressure telescopic support piece, and the height of the raised sponge cushion on the backrest is changed, so that a user can conveniently adjust the height of the raised sponge cushion, the waist of the user with different heights is powerfully supported, and the comfort of the user is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of office chairs, and particularly relates to an office chair with a liftable backrest. Background Art

[0002] Office chairs are constantly evolving to adapt to the increasing demands of modern working environments for human health, work efficiency and aesthetics. The design of office chairs is increasingly focused on ergonomic principles, aiming to reduce the physical burden caused by long periods of sitting and working, such as back pain, cervical discomfort and other problems. This includes adjustable seat height, backrest tilt angle, seat cushion depth and armrest position to meet the needs of users of different body shapes.

[0003] According to the ergonomic design, the backrest of the office chair often has a certain part of the protrusion to meet the needs of office workers to hold up the backrest. Office workers of different heights have different height requirements for the protrusion on the backrest of the office chair. The protrusion of the backrest of traditional office chairs is often set to a fixed position and cannot be adjusted. For people who are too short or too tall, sitting for a long time while working in the office chair will cause certain damage to the waist and increase the fatigue of the user.

[0004] Therefore, in order to facilitate the adjustment of the height of the backrest and make the office chair more in line with the needs of the user, an office chair with a liftable backrest is needed to solve the existing problem. Utility Model Content

[0005] In view of this, the utility model aims to provide an office chair with a liftable backrest, which drives the backrest to be lifted and lowered by a first pneumatic telescopic support, thereby changing the height of the raised sponge pad on the backrest, making it convenient for users to adjust the height of the raised sponge pad, providing strong support for the waists of users of different heights, and ensuring the comfort of the users.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: an office chair with a liftable backrest, comprising a seat and a backrest, a raised sponge pad is installed at the lower part of the backrest, a support shell is fixedly installed at the bottom of the seat, a curved support plate is extended on the rear side wall of the support shell, the top of the curved support plate is connected to a plastic shell plate located at the rear side of the seat, the inclination of the plastic shell plate is the same as the bending curvature of the rear side wall of the backrest, and the plastic shell plate is not connected to the backrest, and a first pneumatic telescopic support is also installed on the lower side wall of the support plate, and the telescopic end of the first pneumatic telescopic support is connected to the lower part of the rear side wall of the backrest; that is, the raised sponge pad supports the waist of the user, that is, the support shell supports the side wall of the curved support plate, that is, the first pneumatic telescopic support drives the backrest to rise and fall, and the seat and the backrest are not connected, so that the height of the backrest can be adjusted conveniently.

[0007] A bearing base is also installed on the top of the backrest, and a sponge headrest is installed on the bearing base through a ring; that is, the bearing base allows the sponge headrest to be adjusted in angle through the ring, that is, the sponge headrest can support the head of the user.

[0008] The left and right side walls of the chair seat are also symmetrically provided with armrests; that is, the armrests are convenient for users to place their arms.

[0009] A second pneumatic telescopic support is installed at the bottom of the seat, and a support leg is fixedly installed at the other end of the second pneumatic telescopic support, and the support legs are distributed in a circular array; that is, the support leg supports the office chair, and the second pneumatic telescopic support drives the seat to rise and fall and adjust the height.

[0010] The bottom of the legs is also equipped with walking wheels, that is, the walking wheels make it convenient for users to move the office chair.

[0011] Working principle: When using the office chair, people of different heights can directly hold both sides of the backrest with both hands and lift the backrest of the office chair upwards. Driven by the first pneumatic telescopic support, the backrest moves up and down. At the same time, the raised sponge pads are located at different heights to support the waist of people of different heights.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] The first pneumatic telescopic support drives the backrest to rise and fall, thereby changing the height of the raised sponge pad, making it convenient for users to adjust the height of the raised sponge pad. For people who are too tall or too short, the raised sponge pad is more suitable for the leaning posture, providing strong support for the user's waist and ensuring the user's comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 3 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 4 For the utility model Figure 1 A is a schematic diagram of the partially enlarged structure.

[0019] In the figure: 101, seat; 102, backrest; 103, raised sponge pad; 104, support shell; 105, arc support plate; 106, plastic shell plate; 107, first gas pressure telescopic support;

[0020] 201. bearing base; 202. sponge headrest; 203. armrest; 204. second pneumatic telescopic support; 205. supporting leg; 206. running wheel. DETAILED DESCRIPTION

[0021] In order to better understand the present invention, the content of the present invention is further clearly described below in conjunction with the embodiments, but the protection content of the present invention is not limited to the following embodiments. In the following description, a large number of specific details are given in order to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details.

[0022] like Figure 1-4 As shown, an office chair with a liftable backrest comprises a seat 101 and a backrest 102, a raised sponge pad 103 is installed at the lower part of the backrest 102, a support shell 104 is fixedly installed at the bottom of the seat 101, a curved support plate 105 is extended on the rear side wall of the support shell 104, a plastic shell plate 106 located at the rear side of the seat 101 is connected to the top of the curved support plate 105, the plastic shell plate 106 is fixedly installed on the top of the curved support plate 105, the inclination of the plastic shell plate 106 is the same as the curvature of the rear side wall of the backrest 102, and the plastic shell plate 106 is not connected to the backrest 102, and a first gas pressure telescopic support 107 is also installed on the lower side wall of the support plate. The telescopic end of the component 107 is connected to the lower part of the rear side wall of the backrest 102; that is, the raised sponge pad 103 supports the user's waist, that is, the support shell 104 supports the side wall of the arc support plate 105, that is, the first pneumatic telescopic support component 107 drives the backrest 102 to rise and fall, thereby changing the height of the raised sponge pad 103, which is convenient for the user to adjust the height of the raised sponge pad 103. For people who are too tall or too short, the raised sponge pad 103 is more suitable for the leaning posture, provides strong support for the user's waist, and ensures the user's comfort. The seat 101 and the backrest 102 are not connected, which is convenient for adjusting the height of the backrest 102.

[0023] like Figure 4 As shown, a bearing base 201 is also installed on the top of the backrest, and a sponge headrest 202 is installed on the bearing base through a ring; that is, the bearing base 201 can adjust the angle of the sponge headrest 202 through the ring to increase the comfort of use, that is, the sponge headrest 202 can support the head of the user.

[0024] like Figure 1 , 2 As shown, armrests 203 are symmetrically installed on the left and right side walls of the seat 101; that is, the armrests 203 are convenient for users to place their arms.

[0025] like Figure 3 As shown, a second gas pressure telescopic support 204 is installed at the bottom of the seat 101, and a support leg 205 is fixedly installed at the other end of the second gas pressure telescopic support 204, and the support legs 205 are arranged in a circular array; that is, the support legs 205 support the office chair, that is, the second gas pressure telescopic support 204 drives the seat 101 to move up and down to adjust the height. The bottom of the support leg 205 is also installed with a running wheel 206, that is, the running wheel 206 facilitates the user to move the office chair.

[0026] Working principle: When using the office chair, people of different heights can directly hold both sides of the backrest 102 with both hands and lift the backrest 102 of the office chair upwards. Driven by the first pneumatic telescopic support 107, the backrest 102 moves up and down. At the same time, the raised sponge pad 103 is located at different heights to support the waist of people of different heights.

[0027] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0028] The above is a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An office chair with a liftable backrest, characterized in that: The invention comprises a seat (101) and a backrest (102), wherein a raised sponge pad (103) is installed at the lower part of the backrest (102), a support shell (104) is fixedly installed at the bottom of the seat (101), an arc support plate (105) is extended on the rear side wall of the support shell (104), the top of the arc support plate (105) is connected to a plastic shell plate (106) located at the rear side of the seat (101), the inclination of the plastic shell plate (106) is the same as the bending arc of the rear side wall of the backrest (102), and the plastic shell plate (106) is not connected to the backrest (102), and a first pneumatic telescopic support (107) is also installed on the lower side wall of the support plate, and the telescopic end of the first pneumatic telescopic support (107) is connected to the lower part of the rear side wall of the backrest (102).

2. The office chair with a liftable backrest (102) as claimed in claim 1, characterized in that: A bearing base (201) is also installed on the top of the backrest (102), and a sponge headrest (202) is installed on the bearing base (201) via a circular ring.

3. The office chair with a liftable backrest (102) as claimed in claim 1, characterized in that: The left and right side walls of the seat (101) are also symmetrically provided with armrests (203).

4. The office chair with a liftable backrest (102) as claimed in claim 1, characterized in that: A second pneumatic telescopic support (204) is installed at the bottom of the seat (101), and a support leg (205) is fixedly installed at the other end of the second pneumatic telescopic support (204), and the support legs (205) are distributed in a circular array.

5. The office chair with a liftable backrest (102) as claimed in claim 4, characterized in that: The bottom of the supporting leg (205) is also provided with a walking wheel (206).

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