Office chair with waist rest

Abstract

The utility model relates to the technical field of office supplies, in particular to an office chair with a waist rest, which comprises a bottom frame, a chair seat and a chair back, the chair seat and the chair back are both arranged on the bottom frame, the bottom frame comprises a connecting seat, and the lower end of the chair back is in sliding connection with the connecting seat; a mounting hole is formed in the chair back, the office chair further comprises a waist rest, the lower end of the waist rest is arranged on the chair seat, the upper end of the waist rest is located in the mounting hole, and the upper end of the waist rest is connected with the chair back; when the chair back is not stressed, the upper end of the waist rest does not protrude out of the side surface, close to a human body, of the chair back; when the chair back is stressed to move backwards, the upper end of the waist rest protrudes out of the side face, close to the human body, of the chair back. When a user leans backwards, the waist rest protrudes and supports the waist of the user, and the waist rest plays a good role in supporting the waist of the user.

Description

Technical Field

[0001] The utility model relates to the technical field of office supplies, in particular to an office chair with a waist support. Background Art

[0002] Office chairs are common seats nowadays. Since users often sit and work for long periods of time, whether a chair is comfortable and whether it can bring a good experience to users is an issue worthy of attention.

[0003] Existing chairs generally have a seat back and a lumbar support part as an integrated structure. Although the curved back is designed to fit the back of the human body and improve the user's riding experience, since the seat back and the lumbar support part are a fixed integrated structure, when the human body leans backward, the lumbar support part also tilts backward, which cannot provide good support for the user's waist and has a poor lumbar support function for the user. Utility Model Content

[0004] The utility model aims to provide an office chair with a lumbar support, which can protrude and support the waist of the user when the user leans back, thereby playing a good supporting role on the waist of the user.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] An office chair with a lumbar support comprises a base frame, a seat and a backrest, wherein the seat and the backrest are both arranged on the base frame:

[0007] The base frame includes a connecting seat, and the lower end of the chair back is slidably connected to the connecting seat;

[0008] The chair back is provided with a mounting hole, and the office chair further comprises a lumbar support, the lower end of the lumbar support is provided on the chair seat, the upper end of the lumbar support is located in the mounting hole, and the upper end of the lumbar support is connected to the chair back;

[0009] When the chair back is not subjected to force, the upper end of the lumbar support does not protrude from the side of the chair back close to the human body;

[0010] When the chair back is forced to move backward, the upper end of the waist support protrudes from the side of the chair back close to the human body.

[0011] Preferably, the seat is provided with a fixing block, the lumbar support comprises an upper connecting part, a main body and a lower connecting part, the upper connecting part and the lower connecting part are respectively located at the upper and lower ends of the main body, the upper connecting part is connected to the chair back, and the lower connecting part is connected to the fixing block by bolts.

[0012] Preferably, a plurality of short holes are provided on the main body along the width direction.

[0013] Preferably, a plurality of long holes are provided on the main body along the height direction, and the short holes are located above the long holes.

[0014] Preferably, a connecting groove is provided at the lower end of the chair back, a connecting block is provided on the connecting seat, the connecting block is adapted to the connecting groove, the connecting block is inserted into the connecting groove, a plurality of strip holes are provided on the connecting block, a plurality of threaded holes are provided on the connecting groove, the strip holes correspond to the threaded holes one by one, and the corresponding strip holes and the threaded holes are connected by bolts.

[0015] Preferably, a protective seat is provided at the lower end of the seat, the protective seat is made of metal, and the protective seat includes a baffle, and the baffle is located directly above the base frame.

[0016] Preferably, armrests are provided on both sides of the seat along the width direction, the lower ends of the armrests are connected to the lower end surface of the seat, and a locking switch is provided between the lower ends of the armrests and the lower end surface of the seat.

[0017] Preferably, a headrest is provided at the upper end of the chair back.

[0018] The technical solution provided by the utility model may have the following beneficial effects:

[0019] The utility model fixes the lower end of the lumbar support on the seat, and when the chair back moves backward under force, the overall reclining angle of the chair back becomes larger. Correspondingly, the lumbar support can protrude from the surface of the chair back to support the user's waist, thereby preventing the lumbar support from tilting backward with the chair back and losing its supporting function for the user's waist. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is one of the three-dimensional structural schematic diagrams of an embodiment of the utility model;

[0021] Figure 2 This is the second schematic diagram of the three-dimensional structure of an embodiment of the utility model;

[0022] Figure 3 yes Figure 2 A local enlarged schematic diagram of point A in the middle.

[0023] Among them, the base frame 1, the connecting seat 11, the connecting block 111, the strip hole 112, the seat 2, the fixing block 21, the protective seat 22, the seat back 3, the mounting hole 31, the connecting groove 32, the lumbar support 4, the upper connecting part 41, the main body 42, the short hole 421, the long hole 422, the lower connecting part 43, the armrest 5, the locking switch 51, and the headrest 6. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of the features, and are used to distinguish and describe features, without distinction of order or importance.

[0026] In the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0027] In the description of the present invention, it should be noted that, 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 ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Combine the following Figures 1 to 3 , describing an office chair with a lumbar support in an embodiment of the utility model.

[0029] An office chair with a lumbar support comprises a base frame 1, a seat 2 and a chair back 3, wherein the seat 2 and the chair back 3 are both arranged on the base frame 1;

[0030] The base frame 1 includes a connecting seat 11, and the lower end of the chair back 3 is slidably connected to the connecting seat 11;

[0031] The chair back 3 is provided with a mounting hole 31, and the office chair further comprises a lumbar support 4, the lower end of the lumbar support 4 is provided on the chair seat 2, the upper end of the lumbar support 4 is located in the mounting hole 31, and the upper end of the lumbar support 4 is connected to the chair back 3;

[0032] When the chair back 3 is not subjected to force, the upper end of the lumbar support 4 does not protrude from the side of the chair back 3 close to the human body;

[0033] When the chair back 3 is forced to move backward, the upper end of the lumbar support 4 protrudes out of the side of the chair back 3 close to the human body.

[0034] The utility model fixes the lower end of the lumbar support 4 on the seat 2. When the chair back 3 moves backward under force, the overall reclining angle of the chair back 3 becomes larger. Correspondingly, the lumbar support 4 can protrude from the surface of the chair back 3 to support the user's waist, thereby preventing the lumbar support 4 from tilting backward with the chair back 3 and losing its supporting function for the user's waist.

[0035] Preferably, the seat 2 is provided with a fixing block 21, and the lumbar support 4 includes an upper connecting part 41, a main body 42 and a lower connecting part 43, the upper connecting part 41 and the lower connecting part 43 are respectively located at the upper and lower ends of the main body 42, the upper connecting part 41 is connected to the chair back 3, and the lower connecting part 43 is connected to the fixing block 21 by bolts.

[0036] Preferably, a plurality of short holes 421 are provided on the main body 42 along the width direction.

[0037] Preferably, a plurality of long holes 422 are provided on the main body 42 along the height direction, and the short holes 421 are located above the long holes 422 .

[0038] The waist support 4 is provided with a plurality of short holes 421 and a plurality of long holes 422, which can provide good ventilation without affecting the supporting strength of the waist support 4, and can also save materials and reduce the weight of the product. The waist support 4 is made of synthetic fiber material, which has the advantages of high strength and light weight.

[0039] Preferably, a connecting groove 32 is provided at the lower end of the chair back 3, and a connecting block 111 is provided on the connecting seat 11, the connecting block 111 is adapted to the connecting groove 32, the connecting block 111 is inserted into the connecting groove 32, a plurality of strip holes 112 are provided on the connecting block 111, a plurality of threaded holes are provided on the connecting groove 32, the strip holes 112 correspond to the threaded holes one by one, and the corresponding strip holes 112 and the threaded holes are connected by bolts.

[0040] With this structure, the lower end of the chair back 3 can slide with the connecting seat 11, and the sliding distance is determined by the length of the strip hole 112. In order to avoid a large loose feeling of the chair back 3, the length of the strip hole 112 will not be set too large.

[0041] Preferably, a protective seat 22 is provided at the lower end of the seat 2 , and the protective seat 22 is made of metal. The protective seat 22 includes a baffle, and the baffle is located directly above the base frame 1 .

[0042] In order to improve the safety performance of the office chair, a baffle is provided above the cylinder of the base frame 1 to reinforce the bottom of the seat 2 and prevent the user from being hurt when the cylinder fails.

[0043] Preferably, armrests 5 are provided on both sides of the seat 2 along the width direction, the lower ends of the armrests 5 are connected to the lower end surface of the seat 2 , and a locking switch 51 is provided between the lower ends of the armrests 5 and the lower end surface of the seat 2 .

[0044] The armrests 5 can be adjusted via the locking switch 51 , and the adjustment direction is the left and right direction of the office chair, that is, the user can adjust the two armrests 5 to different widths according to usage requirements to improve usage comfort.

[0045] Preferably, a headrest 6 is provided at the upper end of the seat back 3 .

[0046] A headrest 6 is arranged on the chair back 3. When the user leans back, the headrest 6 supports the head and neck of the human body, thereby improving the comfort of the office chair.

[0047] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0048] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An office chair with a lumbar support, comprising a base frame, a seat and a backrest, wherein the seat and the backrest are both arranged on the base frame, characterized in that: The base frame includes a connecting seat, and the lower end of the chair back is slidably connected to the connecting seat; The chair back is provided with a mounting hole, and the office chair further comprises a lumbar support, the lower end of the lumbar support is provided on the chair seat, the upper end of the lumbar support is located in the mounting hole, and the upper end of the lumbar support is connected to the chair back; When the chair back is not subjected to force, the upper end of the lumbar support does not protrude from the side of the chair back close to the human body; When the chair back is forced to move backward, the upper end of the waist support protrudes from the side of the chair back close to the human body.

2. An office chair with lumbar support according to claim 1, characterized in that: The seat is provided with a fixing block, and the lumbar support includes an upper connecting part, a main body and a lower connecting part, the upper connecting part and the lower connecting part are respectively located at the upper and lower ends of the main body, the upper connecting part is connected to the chair back, and the lower connecting part is connected to the fixing block by bolts.

3. An office chair with lumbar support according to claim 2, characterized in that: The main body is provided with a plurality of short holes along the width direction.

4. An office chair with lumbar support according to claim 3, characterized in that: The main body is provided with a plurality of long holes along the height direction, and the short holes are located above the long holes.

5. The office chair with lumbar support according to claim 1, characterized in that: A connecting groove is provided at the lower end of the chair back, and a connecting block is provided on the connecting seat. The connecting block is adapted to the connecting groove and inserted into the connecting groove. A plurality of strip holes are provided on the connecting block, and a plurality of threaded holes are provided on the connecting groove. The strip holes correspond to the threaded holes one by one, and the corresponding strip holes and threaded holes are connected by bolts.

6. The office chair with lumbar support according to claim 1, characterized in that: A protective seat is arranged at the lower end of the seat, the protective seat is made of metal, and the protective seat comprises a baffle, and the baffle is located just above the base frame.

7. An office chair with lumbar support according to claim 1, characterized in that: The seat is provided with armrests on both sides along the width direction, the lower ends of the armrests are connected to the lower end surface of the seat, and a locking switch is provided between the lower ends of the armrests and the lower end surface of the seat.

8. The office chair with lumbar support according to claim 1, characterized in that: A headrest is arranged at the upper end of the chair back.

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