Adjustable backrest structure of an office chair

Abstract

The present invention discloses an adjustable backrest structure of an office chair, comprising: a backrest body, wherein a massage unit is built in the backrest body, and the massage head of the massage unit faces forward; two lumbar supports, which are symmetrically arranged on the front side of the backrest body; and an avoidance driving mechanism, which is installed on the backrest body and connected to the rear sides of the two lumbar supports, and the avoidance driving mechanism is used to drive the two lumbar supports to move away from each other to the left and right sides of the backrest body. When the working people need to massage their waist and back to relax, the avoidance driving mechanism drives the two lumbar supports to move away from each other to the left and right sides of the backrest body. At this time, when the working people sit on the office chair, their waist and back lean on the backrest body, and the massage unit is started, and the massage head massages the waist and back of the working people, so that the working people can massage while working; when the massage function is not needed, the two lumbar supports are relatively close to the front of the backrest body, which is convenient for the working people to lean on.

Description

Technical Field

[0001] The present application relates to the technical field of office chairs, and in particular to an adjustable backrest structure of an office chair. Background Art

[0002] Office workers sit for long periods of time, and their waist muscles and lumbar intervertebral discs are under pressure for a long time, which can easily lead to lumbar muscle strain and cause local pain and other discomfort, affecting their physical condition and work.

[0003] To this end, the utility model patent document with announcement number CN219699454U discloses an office massage chair, including a chair back and a seat cushion. A massage movement body is arranged in the chair back, and the massage movement body includes a running track and a massage movement. A sliding pair is arranged between the running track and the massage movement; the running track extends from one end of the chair back close to the seat cushion to the other end of the chair back away from the seat cushion; the massage movement is used to massage the working surface of the chair back.

[0004] However, the massage mechanism installed in the massage chair is a hard structure. When the massage function is not in use, the office worker sits and leans on the working surface of the chair back, and the massage mechanism inside the chair back will press against the office worker's back, causing discomfort. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an adjustable backrest structure of an office chair that can be used for massage while working, and the technical solutions adopted include:

[0006] An adjustable backrest structure of an office chair, comprising:

[0007] A chair back body, wherein the chair back body has a built-in massage unit, and a massage head of the massage unit faces forward;

[0008] Two lumbar supports are symmetrically arranged on the front side of the chair back body;

[0009] The avoidance driving mechanism is installed on the chair back body and connected to the rear sides of the two lumbar supports. The avoidance driving mechanism is used to drive the two lumbar supports to move away from each other to the left and right sides of the chair back body.

[0010] The technical solution adopted by an embodiment of the present invention to solve its technical problem is: the avoidance drive mechanism includes a drive member and a forward and reverse screw rod, the interior of the chair back body is hollow, the forward and reverse screw rod is horizontally arranged, and its two ends are respectively installed in the chair back body through bearings that rotate with it, the drive member is transmission connected with the forward and reverse screw rod, the forward and reverse screw rod is provided with a forward thread section and a reverse thread section, the front lower end of the chair back body is provided with a sliding groove connected with the interior thereof, the lower ends of the two lumbar supports extend from the sliding groove and are respectively screwed with the forward thread section and the reverse thread section.

[0011] A technical solution adopted by an embodiment of the present invention to solve its technical problem is: the driving part includes a driving motor, a driving gear and a driven gear, the driving motor is installed in the chair back body, the driving gear is installed on the driving shaft of the driving motor, and the driven gear is installed on the forward and reverse screw rods and meshes with the driving gear.

[0012] A technical solution adopted by an embodiment of the present invention to solve its technical problem is: the massage unit includes a lifting mechanism, a massage drive module and a massage head, the lifting mechanism is arranged in the chair back body and connected to the massage drive module, and the massage head is installed on the massage drive module and is located on the rear side of the lumbar support.

[0013] An embodiment of the present invention adopts a technical solution to solve its technical problem: it also includes a position adjustment mechanism, which is installed on the lifting end of the lifting mechanism, and the massage drive module is installed on the position adjustment mechanism. The position adjustment mechanism can drive the massage drive module and the massage head forward or backward.

[0014] An embodiment of the present invention adopts a technical solution to solve the technical problem as follows: a vertically distributed slide rail is provided inside the chair back body, and the massage unit is installed on the slide rail and can be raised and lowered inside the chair back body.

[0015] A technical solution adopted by an embodiment of the present invention to solve the technical problem is: the lifting mechanism is a hydraulic rod.

[0016] The beneficial effects of the present invention are as follows: when the working people need to massage their waist and back to relax, the avoidance driving mechanism drives the two waist supports to move away from each other to the left and right sides of the chair back body. At this time, when the working people sit on the office chair, their waist and back lean on the chair back body, the massage unit is started, and the massage head massages the waist and back of the working people, so that the office people can massage while working; when the massage function is not needed, the two waist supports are relatively close to the front of the chair back body, so that the office people can work conveniently by leaning on their waist and back. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 The structure of the office chair described in the embodiment of the present application is shown in FIG. Figure 1 ;

[0019] Figure 2 The structure of the office chair described in the embodiment of the present application is shown in FIG. Figure 2 ;

[0020] Figure 3 This is a side view of the backrest body of the office chair described in the embodiment of the present application

[0021] Figure 4 This is a schematic diagram of the structure inside the backrest body of the office chair described in the embodiment of the present application;. DETAILED DESCRIPTION

[0022] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0023] In the description of the present invention, the meaning of "above", "below", "exceed", etc. is not inclusive of the number itself, and the meaning of "above", "below", "within", etc. is inclusive of the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0024] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0026] Reference Figure 1-4 , an embodiment of the present application is proposed, and the adjustable backrest structure of the office chair described in this embodiment includes:

[0027] A chair back body 10, wherein the chair back body 10 has a built-in massage unit 20, and a massage head 21 of the massage unit 20 faces forward;

[0028] Two lumbar supports 30 are symmetrically arranged on the front side of the chair back body 10;

[0029] The avoidance driving mechanism 40 is installed on the chair back body 10 and connected to the rear sides of the two lumbar supports 30 . The avoidance driving mechanism 40 is used to drive the two lumbar supports to move away from each other to the left and right sides of the chair back body 10 .

[0030] When the office chair is used for work without activating the massage function, two lumbar supports 30 are distributed on the front side of the chair back body 10. At this time, when the working person sits on the office chair, his waist leans on the lumbar support 30 and is supported, which perfectly fits the human waist, provides good support, relieves the pressure on the lumbar spine, and reduces the risk of lumbar injury. And because the working person leans on the lumbar support 30 when sitting, and does not lean directly on the chair back body 10, the hard massage head 21 will not touch the working person's waist and back, thereby avoiding affecting the comfort of the office chair.

[0031] When the working people need to massage their waist and back to relax, the avoidance driving mechanism 40 drives the two waist supports to move away from each other to the left and right sides of the chair back body 10. At this time, when the working people sit on the office chair, their waist and back lean on the chair back body 10, the massage unit 20 is started, and the massage head 21 massages the waist and back of the working people.

[0032] Specifically, the avoidance drive mechanism 40 includes a drive member 41 and a forward and reverse screw rod 42. The interior of the chair back body 10 is hollow. The forward and reverse screw rod 42 is horizontally arranged, and its two ends are respectively installed in the chair back body 10 through bearings that rotate with it. The drive member 41 is transmission connected with the forward and reverse screw rod 42. The forward and reverse screw rod 42 is provided with a forward thread section and a reverse thread section. The front lower end of the chair back body 10 is provided with a sliding groove connected with the interior thereof. The lower ends of the two lumbar supports 30 extend from the sliding groove and are respectively screwed with the forward thread section and the reverse thread section.

[0033] The driving member 41 drives the positive and negative threaded rods 42 to rotate, and the lumbar support 30 moves synchronously along the positive and negative threaded rods 42 to move closer or farther from each other. A connecting member 31 is installed on the lumbar support 30, and a sliding groove is provided at the lower front end of the chair back body 10. The connecting member 31 passes through the sliding groove and is screwed with the positive and negative threaded rods 42.

[0034] Specifically, the massage unit 20 includes a lifting mechanism 23 , a massage driving module 22 and a massage head 21 . The lifting mechanism 23 is disposed in the chair back body 10 and connected to the massage driving module 22 . The massage head 21 is mounted on the massage driving module 22 .

[0035] When the working people sit and lean on the lumbar support 30, the lifting mechanism 23 hides the hard massage head 21 to the back of the lumbar support 30, thereby preventing the hard massage head 21 from hitting the back of the working people and affecting the comfort of the office chair; and when using the massage unit 20, the massage head 21 is raised and lowered on the chair back body 10 to massage the waist and back of the working people and improve the massage comfort.

[0036] The driving member 41 includes a driving motor 411, a driving gear 412 and a driven gear. The driving motor 411 is installed in the chair back body 10, the driving gear 412 is installed on the driving shaft of the driving motor 411, and the driven gear is installed on the forward and reverse screw rods 42 and meshes with the driving gear 412. The forward and reverse screw rods 42 are driven to rotate by the driving motor 411, thereby driving the two lumbar supports 30 to move closer to or away from each other.

[0037] Furthermore, a vertically distributed slide rail 11 is provided inside the chair back body 10 , and the massage unit 20 is installed on the slide rail 11 and can be raised and lowered inside the chair back body 10 , so that the massage unit 20 can be raised and lowered smoothly.

[0038] In this embodiment, the lifting mechanism 23 is a hydraulic rod.

[0039] Based on the above content, a position adjustment mechanism 24 is further included, the position adjustment mechanism 24 is installed on the lifting end of the lifting mechanism 23, the massage drive module 22 is installed on the position adjustment mechanism 24, and the position adjustment mechanism 24 can drive the massage drive module 22 and the massage head 21 to move forward or backward. As shown in the accompanying drawings, the position adjustment mechanism 24 uses a telescopic rod, the massage drive module 22 uses a motor, and the massage drive module 22 is installed on the telescopic end of the position adjustment mechanism 24.

[0040] When the working people need to massage their waist and back to relax, the avoidance driving mechanism 40 drives the two waist supports 30 to move away from each other to the left and right sides of the chair back body 10, and then the position adjustment mechanism 24 drives the massage driving module 22 and the massage head 21 to move forward to approach the front side of the chair back body 10. At this time, when the working people sit on the office chair, their waist and back lean against and contact the chair back body 10, and the massage unit 20 is started, and the massage head 21 massages the waist and back of the working people, ensuring the massage strength and improving the massage comfort;

[0041] When massage is not needed, the position adjustment mechanism 24 drives the massage drive module 22 and the massage head 21 to move backward away from the front side of the chair back body 10. When working people sit on the office chair, the lifting mechanism 23 can be installed on the rear side of the chair back body 10. The waist and back will not be hurt by the hard lifting mechanism 23 when leaning on the chair back body 10, thereby ensuring the comfort of the chair back body 10.

[0042] The office chair is also provided with armrests, and a control panel can also be set on the armrests. The control panel controls the lifting mechanism 23, the massage drive module 22 and the position adjustment mechanism 24, so as to control the massage position of the back through the lifting mechanism 23, and start or stop the massage head 21 through the massage drive module 22, and control the contact force with the back through the position adjustment mechanism 24, so as to adjust according to one's own habits.

[0043] Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications and substitutions are all included in the scope defined by the claims of this application.

Claims

1. An adjustable backrest structure for an office chair, characterized in that: include: A chair back body (10), wherein the chair back body (10) has a built-in massage unit (20), and a massage head (21) of the massage unit (20) faces forward; Two lumbar supports (30) are symmetrically arranged on the front side of the chair back body (10); The avoidance drive mechanism (40) is installed on the chair back body (10) and connected to the rear sides of the two lumbar supports (30). The avoidance drive mechanism (40) is used to drive the two lumbar supports (30) to move away from each other to the left and right sides of the chair back body (10).

2. The adjustable backrest structure of an office chair according to claim 1, characterized in that: The avoidance driving mechanism (40) includes a driving member (41) and a forward and reverse threaded rod (42); the interior of the chair back body (10) is hollow; the forward and reverse threaded rod (42) is horizontally arranged, and its two ends are respectively installed in the chair back body (10) through bearings that are rotatably matched therewith; the driving member (41) is transmission-connected with the forward and reverse threaded rod (42); the forward and reverse threaded rod (42) is provided with a forward thread section and a reverse thread section; the front lower end of the chair back body (10) is provided with a sliding groove connected to the interior thereof; the lower ends of the two lumbar supports (30) extend into the sliding groove and are respectively screwed with the forward thread section and the reverse thread section.

3. The adjustable backrest structure of an office chair according to claim 2, characterized in that: The driving member (41) comprises a driving motor (411), a driving gear (412) and a driven gear; the driving motor (411) is mounted in the chair back body (10); the driving gear (412) is mounted on a driving shaft of the driving motor (411); and the driven gear is mounted on the forward and reverse screw rods (42) and meshes with the driving gear (412).

4. The adjustable backrest structure of an office chair according to claim 1, characterized in that: The massage unit (20) comprises a lifting mechanism (23), a massage drive module (22) and a massage head (21); the lifting mechanism (23) is arranged in the chair back body (10) and connected to the massage drive module (22); and the massage head (21) is mounted on the massage drive module (22).

5. The adjustable backrest structure of an office chair according to claim 4, characterized in that: A vertically distributed slide rail (11) is provided inside the chair back body (10); the massage unit (20) is mounted on the slide rail (11) and can be raised and lowered inside the chair back body (10).

6. The adjustable backrest structure of an office chair according to claim 4, characterized in that: The massage device also includes a position adjustment mechanism (24), wherein the position adjustment mechanism (24) is mounted on the lifting end of the lifting mechanism (23), and the massage drive module (22) is mounted on the position adjustment mechanism (24). The position adjustment mechanism (24) can drive the massage drive module (22) and the massage head (21) to move forward or backward.

7. The adjustable backrest structure of an office chair according to claim 4, characterized in that: The lifting mechanism (23) is a hydraulic rod.

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