Double-layer chair back structure of ergonomic chair

Abstract

The utility model discloses a double-layer chair back structure of an ergonomic chair, which comprises a support frame, the support frame is connected with a chair back, the chair back comprises an outer chair back and an inner chair back, the upper part of the inner chair back is hinged with the outer chair back, and the lower part of the inner chair back is hinged with the outer chair back. And a gear adjusting mechanism capable of adjusting an included angle between the inner chair back and the outer chair back is arranged between the lower part of the inner chair back and the outer chair back. The chair has the advantages that the chair is simple and reasonable in structure, a double-layer chair back structure formed by the outer chair back and the inner chair back is adopted, a user can be supported by the inner chair back, and the chair with the outer chair back is used for decoration, so that the attractiveness of the chair is improved; besides, the upper portion of the inner chair back is hinged to the outer chair back, and a gear adjusting mechanism is arranged to adjust the included angle between the inner chair back and the outer chair back so as to adapt to using habits of different users, and adaptability and comfort of the chair are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to chair manufacturing technical field, especially points to a kind of ergonomic chair, specifically a double-layer chair back structure of ergonomic chair. BACKGROUND

[0002] Chair is a kind of furniture that people often live, work, especially in daily work, people are in sitting posture state for a long time office, so a comfortable and can provide effective support chair is essential.

[0003] Ordinary chair has been difficult to meet people's needs, now ergonomic chair designed according to ergonomics is more and more welcomed by people.For example, the patent application with the application number CN202420225965.X and the name "a kind of ergonomic chair" discloses a chair, including support, the bottom end of the support is fixedly installed with air cylinder, the bottom end of the air cylinder is provided with bottom plate, the bottom end of the bottom plate is fixedly installed with wheel, better use effect is realized, in the use process, such as facing different height users, can be pulled back by holding and pulling the clamping block through the groove, so that the clamping block rotates back through the fixed rod on the right side of the feed port, when the clamping block slides out of the rack, it can be held and pulled up the lumbar pad or backrest, when the lumbar pad and backrest are adjusted to the position needed, the clamping block can be released, so that the clamping block is clamped in the rack under the elastic force of spring, at this time, the sliding plate can be firmly clamped between the connecting block and the mounting block, thereby avoiding the existing ergonomic chair in the use process, the backrest cannot be adjusted in height, when facing different height users, the user experience is poor. The chair back structure of the chair is similar to that of most chairs, the chair back is connected with the chair leg part through support frame, but the chair back does not have adjustability, therefore, the chair back structure of the existing chair needs to be further improved. UTILITY MODEL CONTENTS

[0004] The utility model aims at making up for the above-mentioned shortage, and discloses a double-layer chair back structure of ergonomic chair, which is simple in structure, reasonable, can adjust the included angle between inner chair back and outer chair back, and is good in adaptability.

[0005] The technical scheme of the utility model is implemented as follows:

[0006] A double-layer chair back structure of ergonomic chair, which comprises a support frame, a chair back connected to the support frame, an outer chair back and an inner chair back of the chair back, the upper part of the inner chair back is hinged to the outer chair back, and a gear adjusting mechanism capable of adjusting the included angle between the inner chair back and the outer chair back is arranged between the lower part of the inner chair back and the outer chair back.

[0007] The measures for further optimizing the technical scheme are as follows:

[0008] As improvement, the gear adjusting mechanism comprises a gear rod fixed to the outer chair back and a gear block fixed to the inner chair back, the gear block is provided with a gear slot, and the end of the gear rod is matched with the gear slot.

[0009] As improvement, the gear block is provided with a center block, the outer periphery of the center block is provided with an annular slot, and the center block is provided with a plurality of gear slots.

[0010] As improvement, the gear slots are obliquely arranged. The obliquely arranged gear slots enable the gear rod to automatically slide into the gear slots.

[0011] As improvement, the outer chair back is provided with an assembling slot, and one end of the gear rod is assembled into the assembling slot.

[0012] As improvement, the outer chair back is provided with a sliding groove matched with the gear block, and the gear block is slidingly matched with the sliding groove.

[0013] As improvement, the inner chair back comprises an upper back support and a lower back support, and the upper part of the inner chair back is fixed with a headrest support assembly. The inner chair back is divided into the upper back support and the lower back support, so that the adjustability is increased.

[0014] As improvement, the lower back support is provided with a first waist pad, a second waist pad and a third waist pad from top to bottom. The waist pad combination of the first waist pad, the second waist pad and the third waist pad supports the waist, and the support is better.

[0015] As improvement, the lower back support is provided with a side wing plate on each side, and the side wing plate is rotationally connected with the lower back support. The side wing plate can provide support to the two sides of the waist of the user, further improve the support force, and improve the use comfort.

[0016] As improvement, the upper back support is fixed with a clothes hanging rod. The clothes hanging rod is arranged to facilitate the hanging of clothes of the user.

[0017] The advantages of the present application compared with the prior art are:

[0018] The double-layer chair back structure of the ergonomic chair is simple and reasonable in structure, the double-layer chair back structure formed by the outer chair back and the inner chair back can provide support to the user by the inner chair back, the seat is decorated by the outer chair back, and the appearance of the seat is improved. In addition, the upper part of the inner chair back is hingedly connected with the outer chair back, and a gear adjusting mechanism is arranged to adjust the included angle between the inner chair back and the outer chair back, so that the use habits of different users are adapted, and the adaptability and comfort of the seat are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a side view of the utility model;

[0020] Figure 2 It is a three-dimensional structural diagram of the utility model;

[0021] Figure 3 It is a cross-sectional structural diagram of the utility model;

[0022] Figure 4 This is a schematic diagram of the coordination of the shift lever and the shift block of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the gear block of the utility model.

[0024] The names of the reference numerals in the accompanying drawings of the present utility model are:

[0025] Support frame 1, outer seat back 2, assembly groove 2a, slide groove 2b, inner seat back 3, upper back bracket 31, lower back bracket 32, headrest bracket assembly 33, clothes hanging rod 34, gear lever 41, gear block 42, gear groove 42a, center block 42b, annular groove 42c, first lumbar pad 51, second lumbar pad 52, and third lumbar pad 53, side wing panel 6. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below with reference to the accompanying drawings:

[0027] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention as defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0028] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate directions or positions are based on the directions or positional relationships shown in the accompanying drawings, which are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the above terms should not be understood as limitations on the present invention.

[0029] It is to be understood that the term "one" should be understood as "at least one" or "one or more", i.e. in one embodiment the number of one element can be one, and in another embodiment the number of this element can be multiple, the term "one" cannot be understood as a limitation on the number.

[0030] As Figures 1 to 5 The ergonomic chair comprises a support frame 1, a chair back connected to the support frame 1, an outer chair back 2 and an inner chair back 3, the upper part of the inner chair back 3 is hinged to the outer chair back 2, and a gear adjusting mechanism is arranged between the lower part of the inner chair back 3 and the outer chair back 2 to adjust the included angle between the inner chair back 3 and the outer chair back 2.

[0031] The lower end of the support frame 1 is connected to a chair leg.

[0032] The ergonomic chair of the utility model adopts the outer chair back 2 and the inner chair back 3 to form a double-layer chair back structure, wherein the inner chair back 3 mainly provides supporting force, and the outer chair back 2 can provide decoration, thereby improving the appearance of the seat. The main functions of the outer chair back 2 and the inner chair back 3 are different, and the materials thereof can also be different, so that the manufacturing cost can be reduced under the premise of meeting the requirements.

[0033] The gear adjusting mechanism comprises a gear rod 41 fixed to the outer chair back 2 and a gear block 42 fixed to the inner chair back 3, the gear block 42 is provided with a gear slot 42a, and the end of the gear rod 41 is matched with the gear slot 42a.

[0034] The gear block 42 is provided with a center block 42b, the outer periphery of the center block 42b is provided with an annular groove 42c, and the center block 42b is provided with a plurality of gear slots 42a. In the embodiment, the center block 42b is provided with two gear slots 42a.

[0035] The gear slot 42a is arranged obliquely. The obliquely arranged gear slot 42a enables the gear rod 41 to automatically slide into the gear slot 42a along the inclined surface after gear adjustment.

[0036] The ergonomic chair of the utility model realizes the adjustment of the included angle between the inner chair back 3 and the outer chair back 2 through the arrangement of the gear adjusting mechanism, so as to better adapt to the use habits of different users. In the embodiment, the included angle between the inner chair back 3 and the outer chair back 2 can be adjusted in three gears, when the gear rod 41 is located at the position of the annular groove 42c away from one end of the outer chair back 2, it is the first gear, when the gear rod 41 is located in the gear slot 42a on the center block 42b away from the outer chair back 2, it is the second gear, and when the gear rod 41 is located in the gear slot 42a on the center block 42b close to the outer chair back 2, it is the third gear.

[0037] When adjusting the gear position (assuming the initial position is the first gear), only pull the lower end of the inner backrest 3 to make the inner backrest 3 rotate around the hinge shaft of the inner backrest 3 and the outer backrest 2, and the gear lever 41 will enter the second gear from the first gear, and then pull the inner backrest 3 again to enter the third gear from the second gear, and if the inner backrest 3 is pulled again, the gear lever 41 will re-enter the first gear along the annular groove 42c, and the cycle continues.

[0038] The outer backrest 2 is provided with an assembly groove 2a, and one end of the gear lever 41 is assembled in the assembly groove 2a.

[0039] The outer backrest 2 is provided with a sliding groove 2b matched with the gear block 42, and the gear block 42 is in sliding fit with the sliding groove 2b. The sliding groove 2b plays a limiting and guiding role.

[0040] The inner backrest 3 includes an upper back support 31 and a lower back support 32, and a headrest support assembly 33 is fixed to the upper part of the inner backrest 3. The inner backrest 3 adopts a segmented structure, which can better provide support force and better meet the use habits of different users through adjustment of each part.

[0041] The lower back support 32 is provided with a first waist pad 51, a second waist pad 52 and a third waist pad 53 from top to bottom.

[0042] The lower back support 32 is provided with a side wing plate 6 on each side, and the side wing plate 6 is rotationally connected with the lower back support 32. The rotation shaft of the side wing plate 6 and the lower back support 32 adopts a rotation shaft with damping. The rotation shaft with damping is a prior art and can be directly purchased on the market.

[0043] The waist support of the seat adopts a waist pad combination composed of the first waist pad 51, the second waist pad 52 and the third waist pad 53, and the first waist pad 51, the second waist pad 52 and the third waist pad 53 are arranged from top to bottom respectively, and their widths gradually increase from top to bottom. Not only each waist pad has a structure of narrow at top and wide at bottom, but also the combined waist pad combination also has a structure of narrow at top and wide at bottom. Such design can better provide support for the waist of the user. The arrangement of the side wing plate 6 can provide support for the two sides of the waist of the user, thereby better providing support force.

[0044] The upper back support 31 is fixed with a clothes hanging rod 34. The arrangement of the clothes hanging rod 34 facilitates the hanging of clothes of the user.

[0045] The above is only the preferred embodiment of the present application, and does not limit the implementation and protection scope of the present application. For those skilled in the art, it should be realized that any equivalent replacement and obvious changes made according to the content of the present application can be included in the protection scope of the present application.

Claims

1. A double-layer chair back structure for an ergonomic chair, comprising a support frame (1), to which a chair back is connected, characterized in that: The chair back comprises an outer chair back (2) and an inner chair back (3), the upper portion of the inner chair back (3) is hinged to the outer chair back (2), and a gear adjustment mechanism capable of adjusting the angle between the inner chair back (3) and the outer chair back (2) is provided between the lower portion of the inner chair back (3) and the outer chair back (2); the gear adjustment mechanism comprises a gear lever (41) fixed on the outer chair back (2) and a gear block (42) fixed on the inner chair back (3), a gear slot (42a) is provided on the gear block (42), and the end of the gear lever (41) is adapted to the gear slot (42a).

2. The double-layer backrest structure of an ergonomic chair according to claim 1, characterized in that: The shift block (42) is provided with a center block (42b), the outer periphery of the center block (42b) is provided with an annular groove (42c), and the center block (42b) is provided with a plurality of shift grooves (42a).

3. The double-layered backrest structure of an ergonomic chair according to claim 2, characterized in that: The gear slot (42a) is arranged obliquely.

4. The double-layered backrest structure of an ergonomic chair according to claim 3, characterized in that: The outer chair back (2) is provided with an assembly groove (2a), and one end of the shift lever (41) is assembled in the assembly groove (2a).

5. The double-layered backrest structure of an ergonomic chair according to claim 4, characterized in that: A slide groove (2b) adapted to the shift block (42) is provided on the outer chair back (2), and the shift block (42) is slidably matched with the slide groove (2b).

6. The double-layer chair back structure of an ergonomic chair according to any one of claims 1 to 5, characterized in that: The inner chair back (3) comprises an upper back support (31) and a lower back support (32), and a headrest support assembly (33) is fixed to the upper part of the inner chair back (3).

7. The double-layered chair back structure of an ergonomic chair according to claim 6, characterized in that: The lower back support (32) is provided with a first waist pad (51), a second waist pad (52) and a third waist pad (53) from top to bottom.

8. The double-layered backrest structure of an ergonomic chair according to claim 7, characterized in that: Side wing plates (6) are respectively provided on both sides of the lower back support (32), and the side wing plates (6) are rotatably connected to the lower back support (32).

9. The double-layered backrest structure of an ergonomic chair according to claim 8, characterized in that: A clothes hanging rod (34) is fixed on the upper back support (31).

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