CN217592387U

CN217592387U - Chair back adjusting device

Info

Publication number: CN217592387U
Application number: CN202221006355.8U
Authority: CN
Inventors: 左伯良
Original assignee: Foshan Hongqiao Furniture Co ltd
Current assignee: Foshan Hongqiao Furniture Co ltd
Priority date: 2022-04-27
Filing date: 2022-04-27
Publication date: 2022-10-18
Anticipated expiration: 2032-04-27

Abstract

The utility model provides a chair back adjusting device, which comprises a chair back frame and a chair back connecting frame; the chair back frame is provided with a first rotating part; the chair back connecting frame is provided with a second rotating part, and the first rotating part and the second rotating part are movably connected through an adjusting component; the adjusting component is provided with a first limiting part of which the outer peripheral wall is in a non-circular structure, and the second rotating part is in limiting connection with the first limiting part; the first rotating part is provided with a special-shaped first limiting hole, the first limiting part is clamped and installed in the first limiting hole, the first limiting part can be adjusted in a second-stage rotating mode in the first limiting hole, and the position of the first limiting part in the first limiting hole is adjusted so as to adjust the distance between the chair back frame and the chair back connecting frame; the lower part of the chair back frame is far away from or close to the chair back connecting frame by rotating the knob, so that the aim of adjusting the chair back is fulfilled; meanwhile, the chair back is suitable for different people, and the chair backs at different positions are more humanized and comfortable.

Description

Chair back adjusting device

Technical Field

The utility model relates to an office chair technical field, more specifically the body that says so relates to a back of chair adjusting device.

Background

Most of existing office chairs can be provided with height adjusting mechanisms, some can also be provided with lifting mechanisms and the like of chair backs, and the chair backs can not be adjusted in a forward and backward mode, so that the applicability of the existing office chairs is not strong, the height and size of office workers sitting in offices for a long time are different greatly, the sitting postures of the office chairs are not suitable for most parts, the waist pain and back pain of the office workers are caused to influence the body health, and therefore the chair back adjusting device capable of adjusting the chair backs is necessary to be provided.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a back of chair adjusting device.

In order to realize the purpose, the utility model adopts the following technical scheme: comprises a chair back frame and a chair back connecting frame; the chair back frame is provided with a first rotating part; the chair back connecting frame is provided with a second rotating part, and the first rotating part and the second rotating part are movably connected through an adjusting component; the adjusting component is provided with a first limiting part of which the outer peripheral wall is of a non-circular structure, and the second rotating part is in limiting connection with the first limiting part; the first rotating part is provided with a special-shaped first limiting hole, the first limiting part is clamped into the first limiting hole, the first limiting part can be adjusted in a second-level rotating mode at least in the first limiting hole, and the position of the first limiting part in the first limiting hole is adjusted to adjust the distance between the chair back frame and the chair back connecting frame. The lower part of the chair back frame is far away from or close to the chair back connecting frame by rotating the knob, so that the aim of adjusting the chair back is fulfilled; meanwhile, the chair back has different requirements on the inclination of the chair back when being used, and an obese person may require that the inclination angle of the chair back relative to the vertical plane is larger, namely the chair back is regulated rightwards to increase the inclination angle when being regulated, wherein the inclination angle is expressed in the direction of a figure 4 a; the slimmer may require the chair back to have a slightly smaller angle of inclination relative to the vertical plane, i.e. the angle of inclination is adjusted leftwards as shown in fig. 4a, reducing the angle of inclination, and the chair back is more user-friendly and comfortable to adjust.

In a further technical scheme, the adjusting component comprises: the second rotating part is provided with a second limiting hole corresponding to the first limiting hole; the second rotating part is connected with the first limiting part of the adjusting component at a fixed point through a connecting piece. The first adjusting piece and the second adjusting piece move in the first limiting hole in sequence or in reverse sequence, and the adjustment of the chair back frame is realized.

In a further technical scheme, the connecting piece comprises: the second adjusting piece is provided with a second limiting part and a third limiting hole corresponding to the first limiting part; the rotating spacing body sequentially penetrates through the second limiting hole and the third limiting hole, and the screw penetrates through the rotating spacing body and is mutually fixed with the first adjusting piece, so that mutual fixing of all parts of the adjusting assembly is realized.

In a further technical scheme, the first limiting part is arranged in a triangular shape; the first limiting part is connected with the second limiting part in an inserted mode, and the connecting piece penetrates through the second limiting hole and the third limiting hole and then is connected with the first limiting part in an inserted mode.

In a further technical scheme, the first limiting hole is formed by combining a plurality of sections of connected arc-shaped lines, a limiting angle is formed at the intersection of adjacent arc-shaped lines, and a smooth arc-shaped part is arranged on one side, close to the chair back frame, of the first limiting hole; the first limiting part is of an integrally formed structure, two second limiting parts are arranged at opposite angles of the second limiting part, and the two second limiting parts and the third limiting hole are distributed in a triangular shape; the stability is increased.

In a further technical scheme, the chair back connecting frame is composed of two groups of symmetrical connecting arms; the top ends of the two groups of connecting arms are connected with each other through an arc-shaped section, and the arc-shaped section is integrally provided with a first fixing plate; the first fixing plate is provided with a plurality of first mounting holes; the second rotating parts are arranged on the two groups of connecting arms. The two groups of connecting arms form a certain angle and have certain stability, so that the upper parts of the chair back frame and the chair back connecting frame are more stable.

In a further technical scheme, the upper portion of the chair back frame is provided with an arc-shaped groove, the arc-shaped groove corresponds to the arc-shaped section, and the upper end of the chair back connecting frame is fixed on the chair back frame through the first fixing plate.

In a further technical scheme, the periphery of the arc-shaped groove is provided with screw holes corresponding to the first mounting holes.

In a further technical scheme, one side of the first adjusting piece is provided with an integrated knob.

In a further technical scheme, the first rotating part and the second rotating part are separated by a second adjusting piece.

Known through foretell technical scheme, compare with prior art, the utility model discloses following beneficial technological effect has: the lower part of the chair back frame is far away from or close to the chair back connecting frame by rotating the knob, so that the aim of adjusting the chair back is fulfilled; meanwhile, the chair back is suitable for people with different heights and sizes, and the chair backs in different positions are more humanized and comfortable.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is an exploded view of the adjusting assembly of the present invention.

Fig. 2 is an exploded view of another angle of the adjusting assembly of the present invention.

Fig. 3a is a schematic diagram of the state of the adjusting assembly before adjustment.

Fig. 3b is a schematic diagram of the adjusted state of the adjusting assembly of the present invention.

Fig. 4a is a schematic view of the state of the back frame of the present invention before adjustment.

Fig. 4b is a schematic view of the adjusted state of the seatback frame according to the present invention.

Fig. 5 is another angle structure diagram of the present invention.

Fig. 6 is a schematic structural view of the chair back connecting frame of the present invention.

Fig. 7 is a schematic structural view of the back frame of the present invention.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention. In the description of the present application, it is to be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present application. In the description of the present application, the meaning of "a plurality" is two or more unless otherwise specified.

In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Please refer to fig. 1-7, which illustrate a backrest adjusting device, comprising a backrest frame 1 and a backrest connecting frame 2; the chair back frame 1 is provided with a first rotating part 110; the chair back connecting frame 2 is provided with a second rotating part 210, and the first rotating part 110 and the second rotating part 210 are movably connected through an adjusting component 3; the adjusting component 3 is provided with a first limiting part 311 with a non-circular outer peripheral wall, and the second rotating part 210 is in limiting connection with the first limiting part 311; first rotation portion 110 on seted up the first spacing hole 111 of dysmorphism, first spacing portion 311 go into the installation first spacing hole 111, first spacing portion 311 can carry out the second grade rotation regulation at least in first spacing hole 111, adjusts the position of first spacing portion 311 in first spacing hole 111 to adjust the distance between back of the chair frame 1 and the back of the chair link 2. The lower part of the chair back frame 1 is far away from or close to the chair back connecting frame 2 by rotating the knob, so that the aim of adjusting the chair back is fulfilled; meanwhile, the chair back is suitable for people with different heights and sizes, and the chair backs in different positions are more humanized and comfortable.

Referring to fig. 1-2, the adjusting assembly 3 includes a first adjusting member 310 and a second adjusting member 320; the first rotating part 110 and the second rotating part 210 are separated by a second adjusting piece 320; the second rotating part 210 is provided with a second limiting hole 211 corresponding to the first limiting hole 111; the second rotating portion 210 is connected with the first limiting portion 311 of the adjusting assembly 3 at a fixed point by a connecting member.

The connecting piece include: the second adjusting member 320 is provided with a second limiting portion 321 and a third limiting hole 322 corresponding to the first limiting portion 311; the connecting piece passes through the second limiting hole 211 and the third limiting hole 322 and then is inserted into the first limiting part 311, more specifically, the rotating spacing piece 330 sequentially passes through the second limiting hole 211 and the third limiting hole 322, and the screw 340 passes through the rotating spacing piece 330 and the first adjusting piece 310 and is mutually fixed in the first limiting hole 111, so that the mutual fixation of all parts of the adjusting assembly 3 is realized; the first limiting part 311 and the second limiting part 321 are inserted into the first limiting hole 111, the first adjusting piece 310 is rotated, the first limiting part 311 and the second limiting part 321 rotate in sequence or in reverse sequence, and the first rotating part 110 moves forwards or backwards to adjust the backrest frame 1.

The first adjusting piece 310 is provided with three first limiting parts 311 which are distributed in a triangular shape and are of an integrally formed structure, and compared with three first limiting parts which are independently arranged, the strength is better, the first adjusting piece 310 is not easy to break when being rotated, and meanwhile, the first limiting parts 311 are columnar, so that the second adjusting piece 320 is better driven; the second adjusting part 320 is provided with two second limiting parts 321 and a third limiting hole 322 which are distributed diagonally, the second limiting parts 321 and the third limiting hole 322 are also distributed in a triangular shape and are in one-to-one correspondence with the first limiting parts 311, the second limiting parts 321 are also in a columnar shape, and the diameter of the second limiting parts 321 is smaller than that of the first limiting parts 311, so that the second limiting parts 321 can be directly inserted into the first limiting parts 311 for fixing conveniently; the specific structures of the first limiting portion 311 and the second limiting portion 321 include the following two types:

the first limiting part 311 is a hollow structure and is provided with a cross cavity, the second limiting part 321 is a cross limiting column, and the cross limiting column is inserted into the cross cavity and mutually matched to realize fixation; the other mode is that the first limiting part 311 is in a hollow column shape, a cross limiting column is arranged inside the first limiting part, and a cross cavity is formed in the opposite second limiting part 321, so that the same fixing effect can be achieved. First spacing hole 111 be the rectangle structure to four angles are the fillet design, and one side that is close to back of the chair frame simultaneously is smooth arc portion 101, simultaneously first spacing portion 311 correspond the fillet setting, smooth arc portion 101 can make first spacing portion 311's order or the rotation of contrary preface more in the same direction as smooth arc portion 101.

An integrated knob 312 is convexly arranged on the other side of the first adjusting member 310, so that the rotation of the adjusting assembly 3 is conveniently controlled.

The second limiting hole 211 formed in the second rotating portion 210 corresponds to the third limiting hole 322 of the second adjusting member 320.

Referring to fig. 6, the chair back connecting frame 2 is composed of two symmetrical sets of connecting arms 220, and the top ends of the two sets of connecting arms 220 are connected to each other through an arc-shaped section 230, and the arc-shaped section 230 is integrally provided with a first fixing plate 231; the first fixing plate 231 is provided with a plurality of first mounting holes 201, and a certain angle is formed between the two groups of connecting arms 220, so that the stability is better; further, the second rotating portion 210 is disposed on the two sets of connecting arms 220.

The connecting arm 220 comprises a first bending part 221, a second bending part 222 and a third bending part 223, a second fixing plate 224 is arranged at the position of the third bending part 223, and a plurality of second mounting holes 202 are formed in the second fixing plate 224; the second rotating portion 210 is a turning point with the second bending portion 222. The second fixing plate 224 can fix the whole backrest frame 1 to the chair main body through the backrest connecting frame 2, and is good in stability and also can be detached for maintenance.

Referring to fig. 7, the upper portion of the seatback frame 1 has a bent portion, the lower portion of the seatback frame is a bent portion in a fourth bent portion 102 corresponding to the first bent portion 221, the bent portion is separately provided with an arc-shaped groove 103 corresponding to the arc-shaped section 230 of the seatback connecting frame 2, screw holes are formed around the arc-shaped groove 103 corresponding to the first mounting hole 201, and the upper end of the seatback connecting frame 2 is fixed to the seatback frame 1 by a first fixing plate 231; the end of the fourth bending part 102 is provided with a first rotating part 110.

The rotating spacer 330 has a T-shaped hollow structure, which allows a screw 340 to pass through; the length of the rotating spacer 330 is equal to the overlapping thickness of the second rotating part 210 and the second adjusting member 320, and the second adjusting member 320 is not easy to slip by rotating the spacer 330, so that the adjusting effect is not affected.

The working principle of the present invention is further described below:

firstly, the chair back frame 1 and the chair back connecting frame 2 are movably connected through an adjusting component 3; after the rotating spacer 330 passes through the second limiting hole 211 and the third limiting hole 322 from one side of the second rotating part 320, the end of the rotating spacer 330 contacts the first limiting part 311 of the first adjusting part 310 at a right angle in the first limiting hole 111 formed in the first rotating part 110, and passes through the rotating spacer 330 by the screw 340, so that the rotating spacer 330 and the first adjusting part 310 are fixed to each other; meanwhile, the second adjusting part 320 and the first adjusting part 310 are mutually sleeved in the first limiting hole 111, so that the integral installation of the adjusting component 3 is realized; as shown in fig. 3a-4b, in the state of the adjusting assembly 3 and the back frame 1, after the adjusting assembly 3 is sequentially rotated by the knob 312, the first limiting portion 311 and the second limiting portion 321 are sequentially rotated to drive the first rotating portion 110 to move forward, and at the same time, the distance between the fourth bending portion 102 and the second bending portion 222 is increased from L1 to L2, so as to adjust the back frame 1; the original state can be restored after the reverse rotation of the adjusting component 3.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A chair back adjusting device is characterized in that: comprises a chair back frame (1) and a chair back connecting frame (2); the chair back frame (1) is provided with a first rotating part (110); the chair back connecting frame (2) is provided with a second rotating part (210), and the first rotating part (110) and the second rotating part (210) are movably connected through an adjusting component (3); the adjusting component (3) is provided with a first limiting part (311) with a non-circular outer peripheral wall, and the second rotating part (210) is in limiting connection with the first limiting part (311); first rotation portion (110) on seted up the first spacing hole (111) of dysmorphism, first spacing portion (311) go into the installation first spacing hole (111), first spacing portion (311) can carry out the second grade at least in first spacing hole (111) and rotate the regulation, adjust first spacing portion (311) in the position in first spacing hole (111) to adjust the distance between back of the chair frame (1) and back of the chair link (2).

2. The chair back adjustment device of claim 1, wherein: the adjusting component (3) comprises: the first adjusting part (310) and the second adjusting part (320), and the second rotating part (210) is provided with a second limiting hole (211) corresponding to the first limiting hole (111); the second rotating part (210) is connected with the first limiting part (311) of the adjusting component (3) through a connecting piece at a fixed point.

3. A chair back adjustment device as claimed in claim 2, wherein: the connecting piece include: the second adjusting piece (320) is provided with a second limiting part (321) and a third limiting hole (322) corresponding to the first limiting part (311); the rotating spacing part (330) sequentially penetrates through the second limiting hole (211) and the third limiting hole (322), and the screw (340) penetrates through the rotating spacing part (330) to be mutually fixed with the first adjusting part (310), so that the mutual fixation of all parts of the adjusting assembly (3) is realized.

4. The chair back adjustment device of claim 3, wherein: the first limiting part (311) is arranged in a triangular shape; the first limiting part (311) is connected with the second limiting part (321) in an inserted mode, and the connecting piece penetrates through the second limiting hole (211) and the third limiting hole (322) and then is connected with the first limiting part (311) in an inserted mode.

5. The chair back adjustment device of claim 4, wherein: the first limiting hole (111) is formed by combining a plurality of sections of connected arc-shaped lines, a limiting angle is formed at the intersection of adjacent arc-shaped lines, and a smooth arc-shaped part (101) is arranged on one side, close to the chair back frame (1), of the first limiting hole (111); the first limiting part (311) is of an integrally formed structure, two second limiting parts (321) are arranged diagonally, and the two second limiting parts (321) and the third limiting hole (322) are distributed in a triangular mode.

6. The chair back adjustment device of claim 5, wherein: the chair back connecting frame (2) is composed of two groups of symmetrical connecting arms (220); the top ends of the two groups of connecting arms (220) are connected with each other through an arc-shaped section (230), and the arc-shaped section (230) is integrally provided with a first fixing plate (231); the first fixing plate (231) is provided with a plurality of first mounting holes (201); the second rotating part (210) is arranged on the two groups of connecting arms (220).

7. The chair back adjustment device of claim 6, wherein: the upper portion of the chair back frame (1) is provided with an arc-shaped groove (103) in a separated mode, the arc-shaped groove (103) corresponds to the arc-shaped section (230), and the upper end of the chair back connecting frame (2) is fixed to the chair back frame (1) through a first fixing plate (231).

8. The chair back adjustment device of claim 7, wherein: screw holes are formed around the arc-shaped groove (103) corresponding to the first mounting hole (201).

9. The chair back adjustment device of claim 2, wherein: an integrated knob (312) is arranged on one side of the first adjusting piece (310).

10. The chair back adjustment device of claim 1, wherein: the first rotating part (110) and the second rotating part (210) are separated by a second adjusting piece (320).