Back supporting device and seat

Abstract

The utility model discloses a back supporting device and a seat, the back supporting device comprises a base, a backrest and a swing assembly, and the backrest is connected with the base through the swing assembly; the swing assembly comprises a fixing piece, a swing piece and a swing reset piece, the fixing piece is connected to the base, the swing piece is connected to the fixing piece and can swing left and right, and the swing reset piece is arranged between the swing piece and the fixing piece and used for driving the swing piece to reset. According to the back supporting device provided by the embodiment of the utility model, the backrest can swing left and right along with the back of the user, so that the back of the user can be well supported, and the user experience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of seat manufacturing, in particular to a back support device and a seat. Background Art

[0002] The structure of the seat includes a seat cushion, a backrest, armrests and a lumbar support. The backrest can provide support for the human back and can greatly improve comfort. However, in the related art, since people's backs will move relative to the back frame when sitting, the backrest fixed to the base cannot support the user's back well, affecting the user's experience. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a back support device, which can swing left and right with the back of the user and can provide better support for the back of the user.

[0004] In a second aspect, the utility model also proposes a chair using the above-mentioned back support device.

[0005] According to the first aspect of the present invention, a back support device is provided, comprising:

[0006] Base;

[0007] A backrest, the backrest being connected to the base via a rocking assembly;

[0008] The swing assembly includes a fixing part, a swing part, and a swing reset part. The fixing part is connected to the base. The swing part is connected to the fixing part and can swing left and right. The swing reset part is arranged between the swing part and the fixing part to drive the swing part to reset.

[0009] The back support device provided by the embodiment of the first aspect of the utility model has at least the following beneficial effects: when the back support device is applied to a seat, the back of the user can abut against the backrest when the user uses the seat, and the backrest can provide support for the user's back; when the user's back moves to the left or right relative to the backrest, the user's back will generate a certain friction with the backrest, and under the action of the friction, the backrest and the rocking member can move with the user's back, thereby providing better support for the user's back, which is conducive to improving the user experience. Moreover, when the user's back is separated from the backrest, under the resetting action of the rocking resetting member, the rocking member can automatically return to the original position, so that the user can abut against it again.

[0010] According to the back support device provided by the embodiment of the first aspect of the utility model, the fixing member and the rocking member are connected via a rotating shaft, an accommodating cavity is defined between the fixing member and the rocking member, and the rocking resetting member is disposed in the accommodating cavity.

[0011] According to the back support device provided by the embodiment of the first aspect of the utility model, shaft pads are provided at both ends of the rotating shaft, and the shaft pads are located between the fixing member and the rocking member to separate the fixing member and the rocking member.

[0012] According to the back support device provided by the first aspect of the embodiment of the utility model, the swing return member includes an annular elastic part and two linkage parts, the two linkage parts are placed on the left and right sides of the elastic part, the elastic part is arranged on the outer periphery of the rotating shaft, and the two linkage parts respectively abut the left and right sides of the swing member.

[0013] According to the back support device provided by the embodiment of the first aspect of the utility model, the swing reset member further includes a sleeve portion connected to the elastic portion, and the sleeve portion is cylindrical and sleeved on the outer circumference of the rotating shaft.

[0014] According to the back support device provided by the first embodiment of the utility model, the fixing member includes two positioning pins, the two positioning pins are arranged on the left and right sides of the fixing member and have the same horizontal height, and the two positioning pins respectively abut the upper sides of the two linkage parts.

[0015] According to the back support device provided by the embodiment of the first aspect of the utility model, the rocking member includes two limit pins, the two limit pins are arranged on the left and right sides of the rocking member and have the same horizontal height, the two limit pins respectively abut the upper sides of the two linkage parts, the fixing member is provided with a limit part extending toward the rocking member, the limit part is located at the lower side of the limit pin, and when the rocking member swings left and right, the limit pin can abut against the limit part.

[0016] According to the back support device provided by the embodiment of the first aspect of the utility model, a mounting groove is provided on the rear side of the base, and the fixing member is fixed to the mounting groove by a fastener.

[0017] According to the back support device provided by the embodiment of the first aspect of the utility model, a connecting portion is provided on the rear side of the rocking member, the connecting portion is provided with a positioning plate, a positioning groove is provided at the lower end of the backrest, the positioning plate is inserted in the positioning groove, and the rocking member is connected to the lower end of the backrest by a fastener.

[0018] The seat provided according to the embodiment of the second aspect of the utility model comprises the back support device as described in the embodiment of the first aspect of the utility model.

[0019] The chair provided by the second embodiment of the utility model has at least the following beneficial effects: when the user uses the chair, the back can be against the backrest, and the backrest can provide support for the user's back; when the user's back moves to the left or right relative to the backrest, the user's back will generate a certain friction with the backrest, and under the action of the friction, the backrest and the rocking member can move with the user's back, thereby providing better support for the user's back, which is conducive to improving the user experience. In addition, when the user's back is separated from the backrest, under the resetting action of the rocking resetting member, the rocking member can automatically return to the original position, so that the user can lean against it again.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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:

[0022] Figure 1 An overall schematic diagram of a back support device provided by an embodiment of the first aspect of the utility model;

[0023] Figure 2 An exploded schematic diagram of a back support device provided by an embodiment of the first aspect of the utility model;

[0024] Figure 3 A schematic diagram of the structure of a swing assembly provided by an embodiment of the first aspect of the utility model;

[0025] Figure 4 A cross-sectional view of a swing assembly provided in an embodiment of the first aspect of the utility model;

[0026] Figure 5 A schematic diagram of an exploded view of a swing assembly provided in an embodiment of the first aspect of the utility model.

[0027] The figures are as follows:

[0028] Base 100; mounting slot 110;

[0029] Backrest 200; Positioning slot 210;

[0030] Swing assembly 300; fixing member 310; positioning pin 311; limiting portion 312; fixing plate 313; swing member 320; connecting portion 321; positioning piece 322; limiting pin 323; swing plate 324; swing reset member 330; elastic portion 331; linkage portion 332; sleeve portion 333; rotating shaft 340; shaft pad 350. DETAILED DESCRIPTION

[0031] 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.

[0032] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, 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 cannot be understood as a limitation on the present invention.

[0033] In the description of the utility model, if there is a description of first and second, it is only for the purpose of distinguishing 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.

[0034] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0035] The structure of the seat includes a seat cushion, a backrest, armrests and a lumbar support. The backrest can provide support for the human back and can greatly improve comfort. However, in the related art, since people's backs will move relative to the back frame when sitting, the backrest fixed to the base cannot support the user's back well, affecting the user's experience.

[0036] To solve this problem, the first embodiment of the utility model provides a back support device, and the backrest 200 can swing left and right with the user's back, which can provide better support for the user's back. The specific structure and function of the back support device provided by the embodiment of the utility model will be further explained in combination with text and drawings.

[0037] Reference Figure 1 and Figure 2 According to the first aspect of the utility model, the back support device provided by the embodiment includes: a base 100, a backrest 200 and a swing assembly 300. The lumbar support is connected to the base 100 through the swing assembly 300. When in use, the backrest 200 can swing left and right following the user's back, which can provide better support for the user's back and is conducive to improving the user experience.

[0038] Reference Figures 3 to 5In some embodiments, the swing assembly 300 includes a fixing member 310, a swing member 320, and a swing reset member 330. The fixing member 310 is connected to the base 100 through fasteners (such as screws, bolts, etc.). The swing member 320 is connected to the fixing member 310 and can swing left and right. The swing reset member 330 is arranged between the swing member 320 and the fixing member 310 to drive the swing member 320 to reset.

[0039] According to the back support device provided by the embodiment of the first aspect of the utility model, the back support device is applied to a seat. When a user uses the seat, the back can be against the backrest 200, and the backrest 200 can provide support for the user's back; when the user's back moves to the left or right relative to the backrest 200, the user's back will generate a certain friction force with the backrest 200. Under the action of the friction force, the backrest and the rocking member 320 can move with the user's back, thereby providing better support for the user's back, which is conducive to improving the user experience. In addition, when the user's back is separated from the backrest 200, under the resetting action of the rocking reset member 330, the rocking member 320 can automatically return to the original position, so that the user can lean against it again.

[0040] Reference Figures 3 to 5 In some embodiments, the swing assembly 300 also includes a rotating shaft 340, the fixing member 310 is located at the lower side of the swing member 320, and the front and rear sides of the fixing member 310 are provided with fixing plates 313 extending downward, and the front and rear sides of the swing member 320 are provided with swing plates 324 extending upward. Through holes are provided on the fixing plate 313 and the swing plate 324, and the rotating shaft 340 passes through the through holes on the fixing plate 313 and the swing plate 324 in turn, thereby realizing the connection between the fixing member 310 and the swing member 320.

[0041] It should be noted that, in addition to the connection method through the rotating shaft 340, rotating holes can be set on the fixing plates 313 on the front and rear sides of the fixing member 310, and turntables can be set on the fixing plates 313 on the front and rear sides of the swinging member 320. The turntables are inserted into the rotating holes, which can also realize the connection between the fixing member 310 and the swinging member 320.

[0042] Reference Figures 3 to 5 In some embodiments, a receiving cavity is defined between the fixing plate 313 of the fixing member 310 and the swing plate 324 of the swing member 320, and the swing reset member 330 is disposed in the receiving cavity, which is beneficial to improving the compactness of the structure.

[0043] Reference Figures 3 to 5In some embodiments, shaft pads 350 are provided at both ends of the rotating shaft 340. The shaft pads 350 are located between the fixed plate 313 of the fixed member 310 and the swing plate 324 of the swing member 320 to separate the fixed member 310 from the swing member 320. This can not only avoid the wear caused by the contact between the fixed member 310 and the swing member 320, but also prevent the occurrence of a large swinging resistance caused by the fit between the fixed plate 313 of the fixed member 310 and the swing plate 324 of the swing member 320 during the swinging process.

[0044] Reference Figures 3 to 5 In some embodiments, the swing reset member 330 includes an annular elastic portion 331 and two linkage portions 332. The elastic portion 331 is formed by spirally bending a metal wire. The two linkage portions 332 are disposed on the left and right sides of the elastic portion 331. The elastic portion 331 is disposed on the outer periphery of the rotating shaft 340. The two linkage portions 332 respectively abut against the left and right sides of the swing member 320. When the swing member swings left and right, the swing member can press down the linkage portion 332 on the left or right side. The linkage portion 332 being pressed down will cause the elastic portion 331 to produce elastic deformation and generate an elastic force. After the elastic force acts on the swing member, it is converted into a reset force. When the user's back is separated from the backrest 200, the reset force can drive the swing member and the backrest 200 to reset.

[0045] It is understandable that the swing member 320 can be replaced by a torsion spring, which is sleeved on the outer periphery of the rotating shaft 340, and whose two ends are respectively abutted against the left and right sides of the swing member 320. When the swing member swings left and right, the swing member can press down the left or right end of the torsion spring to make the torsion spring generate an elastic force. When the user's back is separated from the backrest 200, the elastic force can drive the swing member and the backrest 200 to reset.

[0046] It can be understood that the swing reset member 330 can be a columnar spring. By arranging columnar springs on the left and right sides of the fixing member 310, the columnar springs abut against the swing member 320. When the swing member swings left and right, the swing member can press down the columnar spring on the left or right side to make the columnar spring generate an elastic force. When the user's back is separated from the backrest 200, the elastic force can drive the swing member and the backrest 200 to reset.

[0047] Reference Figures 3 to 5 In some embodiments, the swing reset member 330 also includes a sleeve portion 333 connected to the elastic portion 331. The sleeve portion 333 is cylindrical and sleeved on the outer periphery of the rotating shaft 340. The elastic portion 331 is connected to the rotating shaft 340 through the sleeve portion 333, which is beneficial to improving the reliability of the connection between the rotating shaft 340 and the elastic portion 331.

[0048] It is understandable that the elastic part 331 and the sleeve part 333 can be separately provided or integrally formed, and can be specifically provided according to actual needs. When the elastic part 331 and the sleeve part 333 are separately provided, the sleeve part 333 can be regarded as a sleeve sleeved on the rotating shaft 340.

[0049] Reference Figures 3 to 5 In some embodiments, the fixing member 310 includes two positioning pins 311, which are arranged on the left and right sides of the fixing member 310 and have the same horizontal height. The two positioning pins 311 respectively abut the upper sides of the two linkage parts 332. The two positioning pins 311 can cooperate to position the rocking member 320 and the backrest 200, so that the backrest 200 can remain horizontal.

[0050] Reference Figures 3 to 5 In some embodiments, the swing member 320 includes two limit pins 323, and the two limit pins 323 are arranged on the left and right sides of the swing member 320 and have the same horizontal height. The two limit pins 323 respectively abut the upper sides of the two linkage parts 332, and the fixing member 310 is provided with a limit part 312 extending toward the swing member 320, and the limit part 312 is located at the lower side of the limit pin 323. When the swing member 320 swings left and right, the limit pins 323 on both sides of the swing member 320 can abut against the limit part 312, thereby limiting the swing amplitude of the swing member 320, thereby limiting the swing amplitude of the backrest 200, and avoiding the phenomenon that the user falls due to the excessive swing amplitude of the backrest 200.

[0051] Reference Figures 3 to 5 In some embodiments, a mounting groove 110 is provided on the rear side of the base 100, and the fixing member 310 is fixed to the mounting groove 110 by a plurality of fasteners. The connection between the fixing member 310 and the base 100 is simple and reliable.

[0052] Reference Figures 3 to 5 In some embodiments, a connecting portion 321 is provided on the rear side of the rocking member 320, and the connecting portion 321 is provided with a positioning piece 322 extending upward, and a positioning groove 210 is provided at the lower end of the backrest 200, and the positioning piece 322 is inserted into the positioning groove 210, so as to realize the positioning of the backrest 200; in addition, the rocking member 320 is connected to the lower end of the backrest 200 through a plurality of fasteners, and the connection method between the rocking member 320 and the lumbar support is stable and reliable.

[0053] The seat provided in accordance with the embodiment of the second aspect of the utility model includes a seat cushion, two armrests and a back support device as in the embodiment of the first aspect of the utility model, wherein the seat cushion is arranged on the upper side of the base 100, the two armrests are arranged on the left and right sides of the base 100, and the backrest 200 is located on the rear side of the seat cushion and the base 100.

[0054] According to the chair provided by the second embodiment of the utility model, when the user uses the chair, the back can be against the backrest 200, and the backrest 200 can provide support for the user's back; when the user's back moves to the left or right relative to the backrest 200, the user's back will generate a certain friction force with the backrest 200. Under the action of the friction force, the backrest and the rocking member 320 can move with the user's back, thereby providing better support for the user's back, which is conducive to improving the user experience. In addition, when the user's back is separated from the backrest 200, under the resetting action of the rocking resetting member 330, the rocking member 320 can automatically return to the original position, so that the user can lean against it again.

[0055] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. The above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit it. The present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A back support device, characterized in that: include: Base; A backrest, the backrest being connected to the base via a rocking assembly; The swing assembly includes a fixing part, a swing part, and a swing reset part. The fixing part is connected to the base. The swing part is connected to the fixing part and can swing left and right. The swing reset part is arranged between the swing part and the fixing part to drive the swing part to reset.

2. The back support device according to claim 1, characterized in that: The fixing member is connected to the swing member via a rotating shaft, an accommodating cavity is defined between the fixing member and the swing member, and the swing resetting member is arranged in the accommodating cavity.

3. The back support device according to claim 2, characterized in that: Axle pads are provided at both ends of the rotating shaft, and the axle pads are located between the fixing member and the rocking member and are used to separate the fixing member and the rocking member.

4. The back support device according to claim 2, characterized in that: The swing reset member includes an annular elastic part and two linkage parts, the two linkage parts are arranged on the left and right sides of the elastic part, the elastic part is arranged on the outer periphery of the rotating shaft, and the two linkage parts respectively abut the left and right sides of the swing member.

5. The back support device according to claim 4, characterized in that: The swing restoring member further comprises a sleeve portion connected to the elastic portion, wherein the sleeve portion is cylindrical and sleeved on the outer circumference of the rotating shaft.

6. The back support device according to claim 4, characterized in that: The fixing member comprises two positioning pins, which are arranged on the left and right sides of the fixing member and have the same horizontal height, and the two positioning pins respectively abut against the upper sides of the two linkage parts.

7. The back support device according to claim 6, characterized in that: The rocking member includes two limit pins, which are arranged on the left and right sides of the rocking member and have the same horizontal height. The two limit pins respectively abut the upper sides of the two linkage parts. The fixing member is provided with a limit part extending toward the rocking member, and the limit part is located at the lower side of the limit pin. When the rocking member swings left and right, the limit pin can abut against the limit part.

8. The back support device according to claim 1, characterized in that: A mounting groove is provided on the rear side of the base, and the fixing piece is fixed to the mounting groove by a fastener.

9. The back support device according to claim 1, characterized in that: A connecting part is provided at the rear side of the swing member, and a positioning piece is provided at the connecting part. A positioning groove is provided at the lower end of the backrest, and the positioning piece is inserted into the positioning groove. The swing member is connected to the lower end of the backrest through a fastener.

10. A seat, characterized in that: Comprising a back support device as claimed in any one of claims 1 to 9.

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