Chair backrest with waist protection function and office chair comprising chair backrest

Abstract

The utility model discloses a chair backrest with a waist protecting function, which comprises a chair backrest main body, the bottom of the chair backrest main body is connected with the rear side part of a chair seat through a tilting mechanism, so that the chair backrest main body tilts relative to the chair seat; the elastic waist rest assembly is arranged in the chair back main body and is positioned at the waist position of a human body; when the chair back main body tilts, the elastic waist rest assembly is elastically deformed under the extrusion of the chair back main body, so that the chair back main body protrudes towards the waist of the human body and abuts against the waist of the human body. The utility model further discloses an office chair comprising the chair backrest. According to the utility model, the waist of a human body can be effectively supported when the human body tilts, and the discomfort of the waist of the human body when the human body tilts for a long time is eliminated.

Description

Technical Field

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

[0002] An office chair is designed for office workers, aiming to provide a comfortable sitting posture and support to reduce physical fatigue and health problems caused by long-term work.

[0003] The chair backrest of an office chair is installed on the rear side of the seat. Based on the ergonomic principle, the chair backrest of an office chair is usually designed to be reclinable, which has the following advantages:

[0004] 1. Improve sitting posture: The reclining function allows users to adjust the backrest angle according to personal comfort, helping to maintain a correct sitting posture and reducing pressure on the back and neck.

[0005] 2. Reduce lumbar pressure: By adjusting the backrest angle, the lumbar region can be better supported, reducing the pressure on the lumbar muscles and spine and preventing low back pain.

[0006] 3. Promote blood circulation: Regularly changing the sitting posture, including reclining the backrest, helps promote blood circulation in the legs and lower body, reducing the health risks associated with prolonged sitting.

[0007] 4. Increase comfort: After long hours of work, users can adjust the backrest recline to rest in different postures, increasing comfort and reducing fatigue.

[0008] 5. Adapt to different work activities: Different work activities may require different sitting postures. For example, a relatively straight sitting posture may be needed when writing or using a computer, while a more reclined posture may be preferred when reading or thinking.

[0009] 6. Improve work efficiency: A comfortable sitting posture can reduce physical discomfort, help maintain concentration, and thus improve work efficiency.

[0010] 7. Adapt to the body sizes of different users: The reclining function allows users to adjust the backrest according to their height and body shape to obtain optimal support and comfort.

[0011] 8. Prevent occupational diseases: Prolonged poor sitting postures may lead to musculoskeletal problems such as cervical spondylosis and lumbar spondylosis. The reclining function helps reduce the risk of these occupational diseases.

[0012] 9. Support rest and recovery: During the workday, users can use the reclining function for short breaks, which helps with physical and mental recovery.

[0013] Therefore, the reclining function of the backrest of an office chair is one of its very important functions. However, after the backrest of the existing office chair is tilted, the user also switches to a reclined sitting posture, with the user's back closely against the backrest, but there is a certain gap between the user's waist and the backrest, that is, the waist is not supported by the backrest, resulting in the user's waist being in a suspended state, and a long-term reclined sitting posture will cause discomfort in the user's waist.

[0014] For this reason, through beneficial exploration and research, the applicant has found a solution to the above problems, and the technical solution to be introduced below has emerged under this background. Utility Model Content

[0015] One of the technical problems to be solved by the present utility model is: to provide a backrest with a lumbar support function in view of the deficiencies of the prior art.

[0016] Another technical problem to be solved by the present utility model is: to provide an office chair including the above-mentioned backrest.

[0017] As a backrest with a lumbar support function in the first aspect of the present utility model, it includes a backrest main body, the bottom of the backrest main body is connected to the rear side of the seat through a reclining mechanism, so that the backrest main body reclines relative to the seat; it further includes:

[0018] An elastic lumbar support assembly disposed in the backrest main body at the position of the human waist; when the backrest main body reclines, the elastic lumbar support assembly undergoes elastic deformation under the extrusion of the backrest main body, so that the backrest main body protrudes towards the human waist direction and abuts against the human waist.

[0019] In a preferred embodiment of the present utility model, the backrest main body includes a backrest frame and a backrest surface layer covering the backrest frame.

[0020] In a preferred embodiment of the present utility model, the backrest frame includes an inverted U-shaped backrest support, left and right arc-shaped arms, and a reclining support, the upper ends of the left and right arc-shaped arms are connected to the left and right lower ends of the inverted U-shaped backrest support, and their lower ends are connected to the reclining support, and the reclining support is connected to the reclining mechanism.

[0021] In a preferred embodiment of the present utility model, the backrest surface layer is made of mesh material or fabric material.

[0022] In a preferred embodiment of the present utility model, the elastic lumbar support assembly includes:

[0023] U-shaped elastic lumbar support member, the left and right upper ends of the U-shaped elastic lumbar support member are connected to the middle parts of the left and right sides of the chair back body through left and right spring steel sheets, and a lumbar support seat is formed in the middle of the lower side of the U-shaped elastic lumbar support member;

[0024] A lumbar support fixing seat fixedly arranged on the seat; and

[0025] A sheet-shaped lumbar support connecting rod located between the U-shaped elastic lumbar support member and the lumbar support fixing seat, one end of the sheet-shaped lumbar support connecting rod is hinged to the lumbar support seat through a lumbar support seat rotating shaft, and the other end is hinged to the lumbar support fixing seat through a lumbar support fixing seat rotating shaft.

[0026] In a preferred embodiment of the present invention, the U-shaped elastic lumbar support member protrudes slightly towards the human waist direction in the uncompressed state to adapt to the shape of the human waist.

[0027] An office chair as the second aspect of the present invention includes a seat, a chair backrest arranged on the rear side of the seat, left and right armrests arranged on the left and right sides of the seat, and a moving support mechanism arranged under the seat for supporting the seat; the chair backrest is the above-mentioned chair backrest with a lumbar support function.

[0028] Due to the adoption of the above technical solutions, the beneficial effects of the present invention are as follows: by arranging an elastic lumbar support assembly inside the chair back body and at the position of the human waist, when the chair back body tilts, the elastic lumbar support assembly undergoes elastic deformation under the extrusion of the chair back body, so that the chair back body protrudes towards the human waist direction and abuts against the human waist, eliminating the gap between the human waist and the chair back body during tilting, effectively supporting the human waist, and eliminating the discomfort of the human waist during a long-term tilted sitting posture. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0030] Figure 1 It is a schematic structural diagram of the office chair of the present invention.

[0031] Figure 2 It is a three-dimensional structural diagram of the chair backrest of the present invention.

[0032] Figure 3 It is a schematic structural diagram of the office chair of the present invention in the starting state of the chair backrest.

[0033] Figure 4 This is a schematic structural view of the office chair of the present utility model when the chair backrest is in the reclined state. Detailed implementation manners

[0034] In order to make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the present utility model will be further described below with reference to specific illustrations.

[0035] Refer to Figure 1 , what is shown in the figure is an office chair, which includes a seat 100, a chair backrest 200, left and right armrests 300a, 300b, and a mobile support mechanism 400.

[0036] The chair backrest 200 is arranged on the rear side of the seat 100, the left and right armrests 300a, 300b are arranged on the left and right sides of the seat 100, and the mobile support mechanism 400 is arranged below the seat 100, which is used to support the seat 100 and adjust the height of the seat 100. The mobile support mechanism 400 generally consists of a rod-type cylinder 410, a five-star foot bracket 420, and several casters 430.

[0037] Refer to Figures 2 to 4 , the chair backrest 200 of the present utility model is a chair backrest with a lumbar support function, which includes a backrest main body 210 and an elastic lumbar support assembly 220.

[0038] The bottom of the backrest main body 210 is connected to the rear side of the seat 100 through a reclining mechanism 230, so that the backrest main body 210 reclines relative to the seat 100. In this embodiment, the reclining mechanism 230 that can be adopted is a conventional reclining mechanism in the art, and will not be elaborated here.

[0039] The backrest main body 210 includes a backrest frame 211 and a backrest surface layer (not shown in the figure) covered on the backrest frame 211. The backrest frame 211 includes an inverted U-shaped backrest bracket 2111, left and right arc-shaped arms 2112a, 2112b, and a reclining support 2113. The upper ends of the left and right arc-shaped arms 2112a, 2112b are connected to the left and right lower ends of the inverted U-shaped backrest bracket 2111, and their lower ends are connected to the reclining support 2113. The reclining support 2113 is connected to the reclining mechanism 230, and the reclining mechanism 230 is installed at the rear side of the seat 100. In this embodiment, the backrest surface layer can be made of mesh cloth material, fabric material, etc.

[0040] The elastic lumbar support assembly 220 is arranged inside the backrest main body 210 and at the position of the human waist. The elastic lumbar support assembly 220 includes a U-shaped elastic lumbar support member 221, a lumbar support fixing seat 222, and a sheet-shaped lumbar support connecting rod 223.

[0041] The U-shaped elastic lumbar support member 221 is made of elastic plastic with a certain strength. Its left and right upper ends are connected to the middle parts of the left and right sides of the chair back body 210 through the left and right spring steel sheets 2211a and 2211b, that is, connected to the left and right lower ends of the inverted U-shaped chair back support 2111. In this way, the U-shaped elastic lumbar support member and the inverted U-shaped chair back support 2111 enclose a rectangular frame, and the chair back surface layer is wrapped around this rectangular frame. A lumbar support seat 2212 is formed in the middle of the lower side of the U-shaped elastic lumbar support member 221.

[0042] The lumbar support fixing seat 222 is fixedly arranged on the seat 100. The sheet-shaped lumbar support connecting rod 223 is located between the U-shaped elastic lumbar support member 221 and the lumbar support fixing seat 222. One end of it is hinged to the lumbar support seat 2212 through the lumbar support seat rotating shaft 2231, and the other end is hinged to the lumbar support fixing seat 222 through the lumbar support fixing seat rotating shaft 2232.

[0043] See Figure 3 , when the chair back 200 is in the normal state, that is, the non-extruded state, the middle part of the U-shaped elastic lumbar support member 221 protrudes slightly towards the human waist direction to adapt to the shape of the human waist. In this way, when the chair back is in the upright state, the U-shaped elastic lumbar support member 221 can make the chair back body 210 abut against the human waist.

[0044] See Figure 4 , when the user's back abuts against the chair back 200 and leans backward, the chair back 200 tilts backward. At this time, the main force of the user's back is concentrated on the upper middle part of the chair back 200. The inverted U-shaped chair back support 2111 of the chair back frame 211 transmits the force exerted by the user's back downward to the U-shaped elastic lumbar support member 221 through the left and right spring steel sheets 2211a and 2211b. Since the bottom of the U-shaped elastic lumbar support member 221 is limited by the lumbar support fixing seat 222 and the sheet-shaped lumbar support connecting rod 223 to form a reaction force, the U-shaped elastic lumbar support member 221 is extruded and elastically deformed, so that the chair back body 210 protrudes towards the human waist direction and abuts against the human waist, eliminating the gap between the human waist and the chair back body during tilting, effectively supporting the human waist and eliminating the discomfort of the human waist during a long-term tilted sitting posture. When the chair back 200 is switched from the tilted state to the normal state, under the elastic action of the left and right spring steel sheets 2211a and 2211b, the U-shaped elastic lumbar support member 221 can quickly return to the normal state.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above-mentioned embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A chair backrest with a lumbar support function, comprising a backrest main body, the bottom of the backrest main body is connected to the rear side of the seat through a tilting mechanism, so that the backrest main body tilts relative to the seat; characterized in that, Further comprising: An elastic lumbar support assembly disposed within the backrest main body at the position of the human waist; When the backrest main body tilts, the elastic lumbar support assembly elastically deforms under the extrusion of the backrest main body, causing the backrest main body to protrude towards the human waist direction and abut against the human waist; The elastic lumbar support assembly includes: A U-shaped elastic lumbar support member, the left and right upper ends of the U-shaped elastic lumbar support member are connected to the middle parts of the left and right sides of the backrest main body through left and right spring steel sheets, and a lumbar support seat is formed in the middle part of the lower side of the U-shaped elastic lumbar support member; A lumbar support fixing seat fixedly arranged on the seat; And A sheet-shaped lumbar support link located between the U-shaped elastic lumbar support member and the lumbar support fixing seat, one end of the sheet-shaped lumbar support link is hinged to the lumbar support seat through a lumbar support seat rotating shaft, and the other end is hinged to the lumbar support fixing seat through a lumbar support fixing seat rotating shaft.

2. The chair backrest with a lumbar support function as claimed in claim 1, wherein, The backrest main body includes a backrest frame and a backrest surface layer covering the backrest frame.

3. The chair backrest with a lumbar support function according to claim 2, characterized in that, The backrest frame includes an inverted U-shaped backrest support, left and right arc-shaped arms, and a tilting support. The upper ends of the left and right arc-shaped arms are connected to the left and right lower ends of the inverted U-shaped backrest support, and the lower ends are connected to the tilting support. The tilting support is connected to a tilting mechanism.

4. The chair backrest with a lumbar support function according to claim 2, wherein, The backrest surface layer is made of a mesh material or a fabric material.

5. The chair backrest with a lumbar support function according to claim 1, characterized in that, The U-shaped elastic lumbar support member protrudes towards the human waist direction in an unextruded state to adapt to the shape of the human waist.

6. An office chair, comprising a seat, a chair backrest disposed on the rear side of the seat, left and right armrests disposed on the left and right sides of the seat, and a movable support mechanism disposed under the seat for supporting the seat; characterized in that, The chair backrest is the chair backrest with a lumbar protection function according to any one of claims 1 to 5.

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