Waist supporting structure of ergonomic chair

Abstract

The utility model discloses a waist support structure of an ergonomic chair, which comprises a chair back, a waist support component is arranged on the chair back, the waist support component comprises a support, an upper elastic sheet and a lower elastic sheet are connected onto the support, a first waist pad is hinged to the upper end of the upper elastic sheet, and a second waist pad is hinged to the lower end of the lower elastic sheet. A second waist pad is hinged to the support, and a third waist pad is hinged to the lower end of the lower elastic piece. The waist cushion has the advantages that the structure is reasonable, the waist supporting structure adopts a combined structure of the first waist cushion, the second waist cushion and the third waist cushion, the first waist cushion and the third waist cushion are arranged on the elastic piece, and the first waist cushion, the second waist cushion and the third waist cushion are respectively matched with the hinge points in a hinged mode, so that the self-adaptability of the waist cushion is greatly improved, and the waist cushion is convenient to use. The waist pad combination can be attached to the waist of a user, and therefore the supporting force is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of seat manufacturing, in particular to an ergonomic chair, specifically a lumbar support structure of an ergonomic chair. Background Art

[0002] Seats are a kind of furniture that people often use in their lives and work. Especially in daily work, people often sit for a long time to work. Therefore, a comfortable seat that can provide effective support is very important.

[0003] Ordinary seats can no longer meet people's needs. Now, ergonomic chairs designed according to ergonomics are becoming more and more popular among people. For example, in the patent application with the application number CN202420225965.X and the name of "an ergonomic chair", a seat is disclosed, including a bracket. The bottom end of the bracket is fixedly installed with a cylinder. The bottom end of the cylinder is provided with a bottom plate. The bottom end of the bottom plate is fixedly installed with wheels, achieving better use effects. During use, when facing users of different heights, the clamping block can be pinched through the groove and pulled backward, so that the clamping block rotates backward through the fixing rod on the right side of the feeding port. When the clamping block slides out of the internal rack, then pinch the lumbar pad or the backrest and lift it upward. When the lumbar pad and the backrest are adjusted to the required position, release the clamping block, so that the clamping block is stuck in the internal rack under the elastic force of the spring. At this time, the sliding plate can be firmly stuck between the connecting block and the mounting block, thus avoiding the situation that the backrest of the existing ergonomic chair cannot be adjusted in height during use, which will cause poor user experience when facing users of different heights. Although the lumbar pad can be adjusted in height to adapt to users of different heights, its waist is only supported by a lumbar pad for the user's waist, and the supportability is insufficient. Therefore, the lumbar support structure of the existing seat needs to be further improved. Summary of the Utility Model

[0004] The purpose of the utility model is to make up for the above deficiencies and disclose to the society a lumbar support structure of an ergonomic chair with reasonable structure, good self - adaptability and capable of improving the lumbar support force.

[0005] The technical solution of the utility model is realized as follows:

[0006] A lumbar support structure of an ergonomic chair includes a chair back. A lumbar support assembly is arranged on the chair back. The lumbar support assembly includes a bracket. An upper elastic sheet and a lower elastic sheet are connected to the bracket. The upper end of the upper elastic sheet is hinged with a first lumbar pad. A second lumbar pad is hinged to the bracket. The lower end of the lower elastic sheet is hinged with a third lumbar pad.

[0007] The measures to further optimize the technical solution are as follows:

[0008] As an improvement, the bracket is fixed on a slider, and the slider and the chair back are assembled together so as to be able to slide up and down. The entire supporting structure can move up and down to adapt to the usage habits of different users.

[0009] As an improvement, a shift assembly is provided between the slider and the chair back, the shift assembly includes a matching slide and a shift pin, the slide is provided on the chair back, the slide has a plurality of shift slots along the longitudinal direction, the shift pin is provided on a shift block, the shift block is assembled on the back of the slider, and an elastic member is provided between the shift block and the slider. By providing the shift assembly, the support structure is locked after the upper and lower positions are adjusted, thereby ensuring the reliability of the adjusted position.

[0010] As an improvement, the gear slot is arranged to be inclined with the opening facing upward.

[0011] As an improvement, the shift block is rotatably connected to the slider, and the upper end of the shift block is a quarter-circular structure.

[0012] As an improvement, guide protrusions are respectively arranged on both sides of the slide block, and guide grooves matching the guide protrusions are arranged on the chair back. The slide block can move in a vertical direction through the cooperation between the guide protrusions and the guide grooves.

[0013] As an improvement, the first waist pad, the second waist pad and the third waist pad are all of a narrow upper and wide lower structure.

[0014] As an improvement, the width of the upper end of the second waist pad is greater than the width of the lower end of the first waist pad, and the width of the upper end of the third waist pad is greater than the width of the lower end of the second waist pad.

[0015] The lumbar pad combination consisting of the first lumbar pad, the second lumbar pad and the third lumbar pad has an overall structure that is narrow at the top and wide at the bottom, and can better provide support for the waist.

[0016] As an improvement, side wing panels are respectively arranged on both sides of the waist support assembly, and the side wing panels are rotatably connected to the chair back. The arrangement of the side wing panels can provide support for both sides of the user's waist, further improve the support force, and enhance the comfort of use.

[0017] As an improvement, the outer end of the side wing plate is bent and extended forward to form a raised portion.

[0018] The advantages of the utility model compared with the prior art are:

[0019] The lumbar support structure of an ergonomic chair of the present utility model has a reasonable structure. The lumbar support structure adopts a combined structure of a first lumbar pad, a second lumbar pad, and a third lumbar pad. The first lumbar pad and the third lumbar pad are arranged on an elastic sheet, and the first lumbar pad, the second lumbar pad, and the third lumbar pad are respectively hinged and matched with a hinge point. With such an arrangement, the self - adaptability of the lumbar pad is greatly improved, enabling the combination of lumbar pads to fit well with the user's waist, thereby enhancing the supporting force. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three - dimensional structure diagram of the present utility model;

[0021] Figure 2 is a sectional structure diagram of the present utility model;

[0022] Figure 3 is Figure 2 the enlarged view of part A in

[0023] Figure 4 is a structural schematic diagram of the upper elastic sheet and the lower elastic sheet of the present utility model;

[0024] Figure 5 is a structural schematic diagram of the cooperation between the slider and the guide groove of the present utility model;

[0025] Figure 6 is a structural schematic diagram of the chute of the present utility model;

[0026] Figure 7 is a structural schematic diagram of the dial block of the present utility model.

[0027] The names of the reference numerals in the drawings of the present utility model are as follows:

[0028] Backrest 1, guide groove 1a, bracket 2, upper elastic sheet 31, lower elastic sheet 32, first lumbar pad 41, second lumbar pad 42, third lumbar pad 43, slider 5, guide projection 51, chute 61, gear slot 61a, gear pin 62, dial block 63, elastic member 64, side wing plate 7, upturned portion 71. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The present utility model will be further described in detail below with reference to the drawings:

[0030] The following description is used to disclose the present utility model so that those skilled in the art can implement the present utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles defined in the following description can be used in other implementation schemes, variation schemes, improvement schemes, equivalent schemes, and other technical schemes that do not depart from the spirit and scope of the present utility model.

[0031] Those skilled in the art should understand that in the disclosure of the present utility model, the directions or positions indicated by terms such as "longitudinal", "lateral", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the directions or position relationships shown in the drawings. It is only for the convenience of describing the present utility model in a simplified manner, rather than indicating or implying 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 construed as limitations on the present utility model.

[0032] It can be understood that the term "one" should be construed as "at least one" or "one or more". That is, in one embodiment, the number of one component can be one, while in other embodiments, the number of this component can be multiple. The term "one" should not be construed as a limitation on the quantity.

[0033] As Figures 1 to 7 shown, a lumbar support structure of an ergonomic chair includes a backrest 1. A lumbar support assembly is provided on the backrest 1. The lumbar support assembly includes a bracket 2. An upper elastic sheet 31 and a lower elastic sheet 32 are connected to the bracket 2. The upper end of the upper elastic sheet 31 is hinged with a first lumbar pad 41. A second lumbar pad 42 is hinged on the bracket 2. The lower end of the lower elastic sheet 32 is hinged with a third lumbar pad 43.

[0034] The bracket 2 is fixed to a slider 5. The slider 5 is slidably assembled with the backrest 1 up and down.

[0035] A gear position assembly is provided between the slider 5 and the backrest 1. The gear position assembly includes a matching chute 61 and a gear position pin 62. The chute 61 is provided on the backrest 1. A plurality of gear position grooves 61a are arranged longitudinally in the chute 61. The gear position pin 62 is provided on a shifting block 63. The shifting block 63 is assembled on the back of the slider 5. An elastic member 64 is provided between the shifting block 63 and the slider 5.

[0036] The gear position grooves 61a are inclined with the opening upward.

[0037] The shifting block 63 is rotatably connected to the slider 5. The upper end of the shifting block 63 has a quarter - circle structure. The upper - end quarter - circle structure provides space for the rotation of the shifting block 63 and avoids the rotation of the shifting block 63 being blocked.

[0038] Guide convex blocks 51 are respectively arranged on both sides of the slider 5. Guide grooves 1a adapted to the guide convex blocks 51 are provided on the backrest 1. Through the cooperation of the guide convex blocks 51 and the guide grooves 1a, it can ensure that the slider 5 moves in the vertical direction.

[0039] The entire waist support assembly can adjust the up and down position. When adjusting, it is only necessary to move the position of the slider 5 in the slide groove 61, and the slider 5 drives the bracket 2 and the first waist pad 41, the second waist pad 42, and the third waist pad 43 to move up and down together. The slide groove 61 is provided with a plurality of gear slots 61a in the longitudinal direction, and a shift block 63 is provided on the back of the slider 5. A shift pin 62 is provided on the shift block 63, and the shift pin 62 enters the corresponding gear slot 61a to achieve positioning. When the slider 5 moves, the shift pin 62 is pushed by the inner wall of the gear slot 61a, driving the shift block 63 to overcome the elastic force of the elastic member 64 and rotate, so that the shift pin 62 leaves the current gear slot 61a and enters the vertical channel of the slide groove 61. After the position adjustment is completed, the shift pin 62 enters the corresponding gear slot 61a under the elastic force of the elastic member 64.

[0040] The first waist pad 41, the second waist pad 42, and the third waist pad 43 are all narrow at the top and wide at the bottom.

[0041] The width of the upper end of the second waist pad 42 is greater than the width of the lower end of the first waist pad 41 , and the width of the upper end of the third waist pad 43 is greater than the width of the lower end of the second waist pad 42 .

[0042] Side wing plates 7 are respectively arranged on both sides of the waist support assembly, and the side wing plates 7 are rotatably connected to the chair back 1. The rotating shaft of the side wing plates 7 and the chair back 1 adopts a rotating shaft with self-damping. The rotating shaft with self-damping is an existing technology and can be directly purchased on the market.

[0043] The outer end of the side wing plate 7 is bent and extended forward to form a raised portion 71 .

[0044] The waist support structure of the present invention is composed of a first waist pad 41, a second waist pad 42, and a third waist pad 43 to form a waist pad combination. The first waist pad 41, the second waist pad 42, and the third waist pad 43 are arranged from top to bottom, and their widths gradually increase from top to bottom. Not only each waist pad is narrow at the top and wide at the bottom, but the combined waist pad combination is also narrow at the top and wide at the bottom. Such a design can better provide support for the user's waist.

[0045] The first waist pad 41 is hinged to the upper end of the upper elastic sheet 31, the third waist pad 43 is hinged to the lower end of the lower elastic sheet 32, and the second waist pad 42 is hinged to the bracket 2. That is to say, the first waist pad 41, the second waist pad 42, and the third waist pad 43 are all rotatably connected to the installation position so that they can rotate around the hinge axis; at the same time, the first waist pad 41 and the third waist pad 43 are elastically connected to the bracket 2, so that the entire waist pad combination has good adaptability and can better fit the user's waist, thereby improving good supporting force.

[0046] In addition, the side wing panels 7 on both sides of the lumbar support assembly can provide support for both sides of the user's waist, and the end raised portions 71 are provided so that the side wing panels 7 have better wrapping properties for the waist, which can further enhance the supporting force.

[0047] The above are only preferred embodiments of the present invention, and do not limit the implementation mode and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. The lumbar support structure of an ergonomic chair, comprising a chair back (1), characterized in that: The chair back (1) is provided with a lumbar support assembly, and the lumbar support assembly includes a bracket (2), the bracket (2) is connected with an upper elastic sheet (31) and a lower elastic sheet (32), the upper end of the upper elastic sheet (31) is hinged with a first lumbar pad (41), the bracket (2) is hinged with a second lumbar pad (42), and the lower end of the lower elastic sheet (32) is hinged with a third lumbar pad (43).

2. The lumbar support structure of an ergonomic chair according to claim 1, characterized in that: The bracket (2) is fixed on a slider (5), and the slider (5) and the chair back (1) are assembled together so as to be able to slide up and down.

3. The lumbar support structure of an ergonomic chair according to claim 2, characterized in that: A shift assembly is arranged between the slider (5) and the chair back (1), and the shift assembly comprises a matching slide groove (61) and a shift pin (62). The slide groove (61) is arranged on the chair back (1), and the slide groove (61) is provided with a plurality of shift grooves (61a) along the longitudinal direction. The shift pin (62) is arranged on a shift block (63), and the shift block (63) is assembled on the back side of the slider (5). An elastic member (64) is arranged between the shift block (63) and the slider (5).

4. The lumbar support structure of an ergonomic chair according to claim 3, characterized in that: The gear slot (61a) is arranged to be inclined with its opening facing upward.

5. The lumbar support structure of an ergonomic chair according to claim 4, characterized in that: The shift block (63) is rotatably connected to the slider (5), and the upper end of the shift block (63) is in a quarter-circular structure.

6. The lumbar support structure of an ergonomic chair according to claim 5, characterized in that: Guide protrusions (51) are respectively arranged on both sides of the sliding block (5), and guide grooves (1a) matching the guide protrusions (51) are arranged on the chair back (1).

7. The lumbar support structure of an ergonomic chair according to any one of claims 1 to 6, characterized in that: The first waist pad (41), the second waist pad (42), and the third waist pad (43) are all of a narrow upper part and a wide lower part structure.

8. The lumbar support structure of an ergonomic chair according to claim 7, characterized in that: The width of the upper end of the second waist pad (42) is greater than the width of the lower end of the first waist pad (41), and the width of the upper end of the third waist pad (43) is greater than the width of the lower end of the second waist pad (42).

9. The lumbar support structure of an ergonomic chair according to claim 8, characterized in that: Side wing plates (7) are respectively arranged on both sides of the lumbar support assembly, and the side wing plates (7) are rotatably connected to the chair back (1).

10. The lumbar support structure of an ergonomic chair according to claim 9, characterized in that: The outer end of the side wing plate (7) is bent and extended forward to form a raised portion (71).

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