CN219249642U - Chair backrest connecting structure - Google Patents

Abstract

The utility model relates to the technical field of seats and discloses a seat back connecting structure, which comprises a back support and a back, wherein the back comprises a left back frame and a right back frame which can swing inwards and outwards, a first connecting arm extending to the center of the left back frame is arranged in the left back frame, a second connecting arm extending to the center of the right back frame is arranged in the right back frame, a third connecting arm corresponding to the first connecting arm and a fourth connecting arm corresponding to the second connecting arm are arranged on the back support in an extending mode, a first spring for enabling the left back frame to rotate inwards to reset is arranged between the third connecting arm and the first connecting arm, and a second spring for enabling the right back frame to rotate inwards to reset is arranged between the fourth connecting arm and the second connecting arm. The seat back connecting structure provided by the utility model has the advantages that the back of a user is softer and more comfortable to lean against; meanwhile, the service life of the product is longer, and the maintenance and the replacement are very convenient.

Description

Chair backrest connecting structure

Technical Field

The utility model relates to the technical field of seats, in particular to a seat back connecting structure.

Background

Office chairs are an indispensable article for daily work and study of people. Common office chair generally includes parts such as seat chassis, waist back, headrest, in order to improve the travelling comfort of back, among the prior art, the back of some office chairs can inside and outside pivoted left and right sides two parts constitute, then is equipped with the elastic component corresponding each part and makes it rotate and reset, like this, the back can both play better cladding effect to different crowds.

An utility model patent application with publication number CN114521775A, publication number 2022, month 05 and 24, named a chair back bracket and chair, which is designed by the applicant earlier, discloses a chair back bracket comprising: a connection bracket for connecting the seat chassis, and a lumbar support, a back support and a headrest mounted on the connection bracket; the back rest is characterized by comprising a left back frame and a right back frame which can swing inside and outside, wherein the inner end of each back frame is rotationally connected with the connecting bracket through a rotating shaft, and the outer end of each back frame is connected with the connecting bracket through an elastic support. The chair back support and the chair provided by the utility model have the characteristic of adjustable opening angle of the back left and right; however, the left-right opening angle of the backrest is controlled by a flexible butterfly-shaped bracket, and the softness and comfort of the backrest are not ideal.

Disclosure of Invention

The utility model aims to provide a seat back connecting structure with a back frame and a back of a user more comfortable to be attached, which at least provides a beneficial selection or creation condition for solving one or more technical problems in the prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme.

The seat back connecting structure comprises a back support and a back, wherein the back comprises a left back frame and a right back frame which can swing inside and outside, and the inner ends of the left back frame and the right back frame are respectively connected with the back support in a rotating way through corresponding rotating shafts; the left back frame is internally provided with a first connecting arm extending to the center of the left back frame, the right back frame is internally provided with a second connecting arm extending to the center of the right back frame, the back support is extended with a third connecting arm corresponding to the first connecting arm and a fourth connecting arm corresponding to the second connecting arm, a first spring for promoting the left back frame to rotate inwards to reset is arranged between the third connecting arm and the first connecting arm, and a second spring for promoting the right back frame to rotate inwards to reset is arranged between the fourth connecting arm and the second connecting arm.

Compared with the prior art, the seat back connecting structure provided by the utility model has the advantages that the connecting arms and the return springs are adopted to drive the left back frame and the right back frame to rotate inwards for return, and the left back frame and the right back frame are opened and returned by the elastic acting force provided by the two paired connecting arms and the one spring together, so that the back of a user is softer and more comfortable to lean against; meanwhile, the service life of the product is longer, and the maintenance and replacement of the spring are very convenient.

More preferably, the first connecting arm and the second connecting arm are triangular arms, one vertex of each triangular arm is located at the center part of the left back frame and the right back frame, and the other two vertices of each triangular arm are located on the outer side rods of the left back frame and the right back frame; thus having optimal back-to-back and comfort.

More preferably, circular protrusions or circular grooves for matching with the mounting springs are respectively arranged on the first connecting arm, the second connecting arm, the third connecting arm and the fourth connecting arm; so as to facilitate the connection and installation of the spring.

More preferably, a lumbar support frame is arranged on the back support frame, the top of the lumbar support frame is connected with the back support frame, and the bottom of the lumbar support frame is suspended; a support arm is connected between the lumbar support frame and the back support bracket. Thus, when the waist of the user abuts against the lumbar support frame, the lumbar support frame can swing at a certain angle, and the comfort of lumbar support is improved.

More preferably, the support arm is rotatably connected with the lumbar support frame, and the support arm and the backrest support frame form a lifting connection with adjustable height. Thus, the user can change the supporting angle of the supporting arm according to different actual needs so as to match different comfort requirements of different users.

More preferably, the backrest support is provided with a support arm lifting slide block, the support arm lifting slide block is provided with a protruding stop block, and the lumbar support frame is provided with a stop groove matched with the stop block. In this way, the support arm can always be abutted against the waist support frame stop during lifting adjustment.

More preferably, the lumbar support frame is provided with lumbar support pads, the lumbar support frame and the lumbar support pads are arc-shaped pieces, and the lumbar support pads are positioned in the lumbar support frame and are unfolded left and right. The combined design of the lumbar support frame and the lumbar support pad enables the lumbar of a user to be very comfortable to lean against and can lift along with the backrest.

More preferably, the backrest support comprises a connecting support for connecting a seat and a lifting support which is installed on the connecting support in a lifting manner and has an adjustable height, and the backrest, the lumbar support frame and the supporting arm are all connected with the lifting support.

More preferably, the backrest support comprises a connecting support for connecting the seat and a lifting support which is installed on the connecting support in a lifting manner and has an adjustable height, and the backrest is connected with the lifting support.

Thus, the heights of the backrest and the lumbar support can be properly adjusted according to different actual needs.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, or may be learned by practice of the utility model.

Drawings

Fig. 1 is a schematic structural view of a seat back connecting structure according to the present utility model.

Fig. 2 is a front view of a seat back attachment structure provided by the present utility model.

FIG. 3 is a partial side view of a seat back attachment structure provided by the present utility model.

Fig. 4 shows a partial enlarged view of fig. 3.

Reference numerals illustrate.

1: back rest support, 1-1: connecting bracket, 1-2: lifting support, 1-3: third connecting arm, 1-4: fourth connecting arm, 1-5: support arm lifting slide block, 1-6: and a stop block.

2: back rest, 2-1: left back frame, 2-2: right back frame, 2-3: first connecting arm, 2-4: and a second connecting arm.

3-1: first spring, 3-2: and a second spring.

4-1: lumbar support frame, 4-2: lumbar support pad, 4-3: support arm, 4-4: a stop groove.

5: a chair seat.

Detailed Description

The following description of the specific embodiments of the present utility model is further provided with reference to the accompanying drawings, so that the technical scheme and the beneficial effects of the present utility model are more clear and definite. The embodiments described below are exemplary by referring to the drawings for the purpose of illustrating the utility model and are not to be construed as limiting the utility model.

Referring to fig. 1-2, a seat back connection structure comprises a back support 1 and a back 2, wherein the back 2 comprises a left back frame 2-1 and a right back frame 2-2 which can swing inside and outside, and the inner ends of the left back frame 2-1 and the right back frame 2-2 are respectively connected with the back support 1 in a rotating way through corresponding rotating shafts; the left back frame 2-1 is internally provided with a first connecting arm 2-3 extending to the center of the left back frame, the right back frame 2-2 is internally provided with a second connecting arm 2-4 extending to the center of the right back frame, the back support 1 is extended with a third connecting arm 1-3 corresponding to the first connecting arm 2-3 and a fourth connecting arm 1-4 corresponding to the second connecting arm 1-4, a first spring 3-1 for promoting the left back frame 2-1 to rotate inwards to reset is arranged between the third connecting arm 1-3 and the first connecting arm 2-3, and a second spring 3-2 for promoting the right back frame 2-2 to rotate inwards to reset is arranged between the fourth connecting arm 1-4 and the second connecting arm 2-4.

Compared with the prior art, the seat back connecting structure provided by the embodiment adopts the connecting arms and the return springs to drive the left back frame 2-1 and the right back frame 2-2 to rotate inwards for return, and the opening and the return of the left back frame and the right back frame are the combined action result of the two paired connecting arms and the one spring, so that the back of a user is softer and more comfortable to lean against the back 2; meanwhile, the service life of the product is longer, and the maintenance and replacement of the spring are very convenient.

In this embodiment, it is preferable that the first connecting arm 2-3 and the second connecting arm 2-4 are triangular arms, one vertex of the triangular arm is located at the center of the left back frame 2-1 and the right back frame 2-2, and the other two vertices are located on the outer side bars of the left back frame 2-1 and the right back frame 2-2; preferably, the third connecting arm 1-3 and the fourth connecting arm 1-4 are straight arms with outer ends inclined forward; thus, the back rest has optimal comfort for the back rest and the back rest of the user. It is obvious that the person skilled in the art can try to change the shape of the first connecting arm 2-3 and the second connecting arm 2-4 according to the actual needs; the present embodiment is not limited.

In this embodiment, circular protrusions for matching and installing the springs are preferably provided on the first connecting arm 2-3, the second connecting arm 2-4, the third connecting arm 1-3 and the fourth connecting arm 1-4, respectively, so as to facilitate the connection and installation of the springs. In some embodiments, a circular groove may be used instead of one or more circular protrusions, which may have similar technical effects; the present embodiment is not limited.

Referring to fig. 3 again, the backrest support 1 includes a connection support 1-1 for connecting a seat 5 and a lifting support 1-2 with adjustable height, which is installed on the connection support 1-1 in a lifting manner, and the backrest 2 is connected with the lifting support 1-2. In this way, the height of the entire backrest 2 can be suitably adjusted according to the actual needs. It should be noted that, the specific lifting connection manner between the lifting bracket 1-2 and the connecting bracket 1-1 may be any lifting connection manner known in the prior art or capable of being implemented in the future, which is a common technical knowledge known to those skilled in the art, and will not be described in detail herein. In some embodiments, the lifting support 1-2 may be omitted, and the corresponding lifting function is omitted, which is not limited to the present embodiment.

In this embodiment, a lumbar support frame 4-1 and a lumbar support pad 4-2 are further installed on the lifting support frame 1-2, and one end of the lumbar support pad 4-2 extends into a space surrounded by the lumbar support frame 4-1 and the other end of the lumbar support frame 4-1; the lumbar support frame 4-1 and the lumbar support cushion 4-2 are arc-shaped pieces, and the lumbar support cushion 4-2 is positioned in the lumbar support frame 4-1 and is unfolded left and right. The combined design of the lumbar support frame 4-1 and the lumbar support cushion 4-2 makes the lumbar of the user very comfortable to lean against and can lift along with the backrest.

In this embodiment, the top of the lumbar support frame 4-1 is rotatably connected with the lifting bracket 1-2, and the bottom of the lumbar support frame 4-1 is suspended; a supporting arm 4-3 is connected between the bottom of the lumbar support frame 4-1 and the lifting bracket 1-2. Thus, when the waist of the user abuts against the lumbar support frame 4-1, the lumbar support frame 4-1 can swing at a certain angle, and the comfort of lumbar support is improved.

Further, the support arm 4-3 is rotatably connected with the bottom of the lumbar support frame 4-1, and the support arm 4-3 and the lifting support 1-2 form a height-adjustable lifting connection. In this way, the user can change the supporting angle of the supporting arm 4-3 according to different actual needs so as to match different comfort requirements of different users. Obviously, the connection between the support arm 4-3 and the lumbar support frame 4-1 is not limited to the bottom of the lumbar support frame 4-1, and one skilled in the art can appropriately adjust the connection position between the support arm 4-3 and the lumbar support frame 4-1 according to different actual needs.

Referring to fig. 4, a support arm lifting slider 1-5 is mounted on the lifting bracket 1-2, the support arm lifting slider 1-5 is provided with a protruding stop block 1-6, and the lumbar support frame 4-1 is provided with a stop groove 4-4 matched with the stop block. In this way, the support arm 4-3 can always abut against the waist support frame 4-1 in the lifting adjustment process, and the support effect is ensured.

It should be noted that the height-adjustable connection mode between the supporting arm 4-3 and the lifting bracket 1-2 is multi-gear height-adjustable connection, such as three-gear height adjustment; the specific multi-gear adjusting structure can be an existing known elastic buckle and clamping groove matching mode and the like, and can also be other multi-gear adjusting structures which can be realized in the future; this is a common technical knowledge that is well known to those skilled in the art and will not be described in detail herein.

It should be further noted that, in the description of the present utility model, terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. refer to the orientation and positional relationship based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first", "a second" feature may explicitly or implicitly include one or more of such features, and in the description of the utility model, "at least" means one or more, unless clearly specifically defined otherwise.

In the present utility model, unless explicitly stated and limited otherwise, the terms "assembled," "connected," and "connected" are to be construed broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; can be directly connected or connected through an intermediate medium, and can be communicated with the inside of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless specified and limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "below," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply representing the first feature as having a higher level than the second feature. The first feature being "above," "below," and "beneath" the second feature includes the first feature being directly below or obliquely below the second feature, or simply indicating that the first feature is level below the second feature.

It will be understood by those skilled in the art from the foregoing description of the structure and principles that the present utility model is not limited to the specific embodiments described above, but is intended to cover modifications and alternatives falling within the spirit and scope of the utility model as defined by the appended claims and their equivalents. The portions of the detailed description that are not presented are all prior art or common general knowledge.

Claims (9)

1. The seat back connecting structure comprises a back support and a back, wherein the back comprises a left back frame and a right back frame which can swing inside and outside, and the inner ends of the left back frame and the right back frame are respectively connected with the back support in a rotating way through corresponding rotating shafts; the left back frame is characterized in that a first connecting arm extending to the center of the left back frame is arranged in the left back frame, a second connecting arm extending to the center of the right back frame is arranged in the right back frame, a third connecting arm corresponding to the first connecting arm and a fourth connecting arm corresponding to the second connecting arm extend on the back support, a first spring for enabling the left back frame to rotate inwards to reset is arranged between the third connecting arm and the first connecting arm, and a second spring for enabling the right back frame to rotate inwards to reset is arranged between the fourth connecting arm and the second connecting arm.

2. The seat back connection structure according to claim 1, wherein the first connection arm and the second connection arm are triangular arms, one vertex of the triangular arms is located at a center portion of the left back frame and the right back frame, and the other two vertices are located on outer side rods of the left back frame and the right back frame.

3. A seat back attachment arrangement in accordance with claim 1, wherein circular protrusions or circular grooves are provided on the first, second, third and fourth attachment arms, respectively, for mating with mounting springs.

4. The seat back connection structure according to claim 1, wherein a lumbar support frame is mounted on the back support frame, a top of the lumbar support frame is connected to the back support frame, and a bottom of the lumbar support frame is suspended; a support arm is connected between the lumbar support frame and the back support bracket.

5. The seatback connection of claim 4 wherein said support arm is rotatably coupled to said lumbar support frame and wherein said support arm is coupled to said seatback frame in a height adjustable lifting connection.

6. The seat back connection structure according to claim 5, wherein a support arm lifting slider is mounted on the back support, the support arm lifting slider is provided with a protruding stopper, and the lumbar support frame is provided with a stopper groove that cooperates with the stopper.

7. The seatback connection of claim 4, wherein lumbar support pads are mounted on said lumbar support frame, said lumbar support frame and said lumbar support pads being arcuate members, said lumbar support pads being positioned within said lumbar support frame and deployed side-to-side.

8. The seat back attachment structure of claim 7, wherein the back support includes an attachment bracket for attaching a seat base and a height-adjustable lifting bracket mounted on the attachment bracket in a lifting manner, and wherein the back, the lumbar support frame, and the support arm are all connected to the lifting bracket.

9. The seat back connection structure according to claim 1, wherein the back support includes a connection support for connecting a seat support and a height-adjustable lifting support installed on the connection support in a lifting manner, and the back is connected to the lifting support.

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