CN214510380U

CN214510380U - Chair back adjusting mechanism and chair

Info

Publication number: CN214510380U
Application number: CN202120610575.0U
Authority: CN
Inventors: 廖建甜
Original assignee: Foshan Hengfa Furniture Technology Co ltd
Current assignee: Foshan Hengfa Furniture Technology Co ltd
Priority date: 2021-03-25
Filing date: 2021-03-25
Publication date: 2021-10-29
Anticipated expiration: 2031-03-25

Abstract

The utility model discloses a back of chair adjustment mechanism and seat, a serial communication port, include: the chair comprises a chair back frame and a waist position which are assembled together, wherein the top of the waist position is elastically connected with the chair back frame, and the lower side of the waist position is separated from the chair back frame so that the waist position forms a swing structure with adjustable front and back positions; the waist position is connected with a transmission arm, the transmission arm is provided with transmission arm teeth in strip arrangement, the chair back frame is provided with a rotation limiting part and a knob matched with the rotation limiting part, and the knob is provided with a driving tooth meshed with the transmission arm teeth; the knobs are located on two sides of the chair back frame and are arranged close to the cushion frame. Compared with the prior art, the utility model has the characteristics of transmission structure is simpler, and it is more convenient to adjust.

Description

Chair back adjusting mechanism and chair

Technical Field

The utility model relates to a seat technical field especially relates to a back of chair adjustment mechanism and seat of seat.

Background

In the prior art, most of common chair back adjusting modes are as follows: the inclination of the headrest and the whole chair back is adjusted, and the aim of leaning comfort is fulfilled. The Chinese patent application with the publication number of CN108741857A discloses a fully-adjustable backrest chair, wherein a chair back comprises a plurality of chair back bodies arranged on the left and right sides and two fixing plates arranged up and down, the two fixing plates are respectively arranged on the left and right ends of the plurality of chair back bodies, each chair back body is independently adjustable, the fixing plates control the plurality of chair back bodies through an adjusting mechanism, and the adjusting mechanism can independently adjust the front-back distance of each chair back body. Although the shape of the chair back can be properly adjusted, each fixed chair back body needs to be adjusted, and the operation is complicated; and because the two ends of each chair back body are limited by the fixing plates, the adjustable distance between the front and the back of the chair back is very limited.

The utility model discloses a chinese utility model patent that a publication is CN210842308U discloses an adjustable back of chair of back of chair radian, its back of chair board be towards convex arc structure of chair panel direction and adopt the preparation of elastic plate material, the rear portion of chair panel is equipped with the fixed plate, back of chair board's bottom with the chair panel is connected, back of chair board's top with be equipped with ball screw between the fixed plate, the cooperation is equipped with screw-nut on the ball screw, screw-nut with back of chair board's top is passed through the stay cord and is connected, be equipped with the mounting groove in the chair panel, be equipped with the worm in the mounting groove, the one end of worm with establish the worm wheel of ball screw lower extreme cooperatees, the other end of worm is equipped with the hand wheel. When in use, the radian of the chair back plate is adjusted by rotating the hand wheel. Although the change of the front position and the rear position of the chair back can be realized by changing the radian of the chair back, the transmission structure is complex, the waist bending operation is needed during adjustment, and whether the front position and the rear position of the chair back meet the requirements cannot be accurately sensed in real time.

Disclosure of Invention

To the problems existing in the prior art, the utility model aims to provide a chair back adjusting mechanism with simpler structure and more convenient adjustment.

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

A chair back adjustment mechanism, comprising: the chair comprises a chair back frame and a waist position which are assembled together, wherein the top of the waist position is elastically connected with the chair back frame, and the lower side of the waist position is separated from the chair back frame so that the waist position forms a swing structure with adjustable front and back positions; the waist position is connected with a transmission arm, the transmission arm is provided with transmission arm teeth in strip arrangement, the chair back frame is provided with a rotation limiting part and a knob matched with the rotation limiting part, and the knob is provided with a driving tooth meshed with the transmission arm teeth; the knobs are located on two sides of the chair back frame and are arranged close to the cushion frame.

More preferably, the waist position is an arc waist position protruding directly above the seat cushion frame.

More preferably, the two transmission arms are symmetrically arranged at two sides of the waist position; and connecting arms corresponding to the transmission arms are respectively arranged on two sides of the chair back frame, and each connecting arm is provided with a corresponding rotation limiting part and a corresponding knob.

More preferably, the transmission arm is a separate piece, and the transmission arm and the waist position are fixed through screws or buckles.

More preferably, the connecting arm is integrally formed on the seat back frame, and the middle part of the connecting arm is fixedly connected with the cushion frame through a reinforcing bolt.

More preferably, the rotation limiting part is a circular ring part embedded in the seat back frame, the inner circumferential edge of the circular ring part is provided with limiting teeth for positioning the knob, and the outer circumferential edge of the circular ring part is provided with an embedded protrusion for embedding and positioning the circular ring part and the seat back frame; and a limiting bulge matched with the limiting tooth is arranged on the inner side of the knob.

More preferably, a handle position protruding outward is provided on an outer side of the knob.

More preferably, the handle is a straight handle.

The utility model also provides a seat, its characterized in that, this seat has above-mentioned back of the chair adjustment mechanism.

The utility model has the advantages that: the waist position is set into a swing structure with adjustable front and back positions, and the front and back swing of the waist position is in transmission connection with the rotation of the knob; when the chair back is actually adjusted, the knob is rotated, and the waist position can be driven to swing back and forth or backwards through the transmission between the driving tooth and the connecting arm tooth, so that the aim of adjusting the chair back is fulfilled. Compared with the prior art, the utility model discloses not only transmission simple structure, moreover because the knob is located back of the chair frame's both sides and is close to the cushion frame setting, when carrying out the back of the chair regulation, can directly lean on the regulation of carrying out the back of the chair again on the back of the chair, whether the perception back of the chair regulation that can be better targets in place.

Drawings

Fig. 1 is a schematic structural view of a chair back adjusting mechanism provided by the present invention.

Fig. 2 is a schematic view of the transmission structure of the backrest frame and the lumbar region.

Fig. 3 is a schematic structural diagram of the driving arm.

Fig. 4 is a schematic structural diagram of the adjusting knob.

Fig. 5 is a schematic structural view of the stop collar.

Fig. 6 is a schematic view of a seat structure provided by the present invention.

Reference numerals indicate the same.

1: seatback frame, 2: waist position, 3: drive arm, 4: driving arm teeth, 5: rotation limiting member, 6: knob, 7: driving tooth, 8: cushion frame, 9: connecting arm, 10: reinforcing pin, 11: a chair.

5-1: limiting teeth, 5-2: and fitting the projections.

6-1: limiting protrusion, 6-2: the handle position.

Detailed Description

In the description of the present invention, it should be noted that, for the orientation words, if there are terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and positional relationship indicated are based on the orientation or positional relationship shown in the drawings, and only for the convenience of describing the present invention and simplifying the description, it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and not be construed as limiting the specific scope of the present invention.

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

In the present invention, unless otherwise expressly specified or limited, the terms "assembled", "connected", and "connected", if any, are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; the two elements can be directly connected or connected through an intermediate medium, and the two elements can be communicated with each other. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

In the present application, unless otherwise specified or limited, "above" or "below" a first feature may include the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other through another feature therebetween. Also, the first feature being "above," "below," and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply an elevation which indicates a level of the first feature being higher than an elevation of 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 merely means that the first feature is at a lower level than the second feature.

The following description will be further made in conjunction with the accompanying drawings of the specification, so that the technical solution and the advantages of the present invention are clearer and clearer. The embodiments described below are exemplary and are intended to be illustrative of the present invention, but should not be construed as limiting the invention.

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

As shown in fig. 1 to 5, a chair back adjustment mechanism is characterized by comprising: the chair comprises a chair back frame 1 and a waist position 2 which are assembled together, wherein the top of the waist position 2 is elastically connected with the chair back frame 1, and the lower side of the waist position 2 is separated from the chair back frame 1 to form a swing structure with adjustable front and back positions; the waist position 2 is connected with a transmission arm 3, the transmission arm is provided with transmission arm teeth 4 which are arranged in a strip shape, the chair back frame 1 is provided with a rotation limiting part 5 and a knob 6 which is matched with the rotation limiting part 5, and the knob 6 is provided with a driving tooth 7 which is meshed with the transmission arm teeth 4; the knobs 6 are located on both sides of the seatback frame 1 and disposed close to the cushion frame 8.

When the chair back is actually adjusted, the knob 6 is rotated, and the waist position 2 can be driven to swing back and forth or backwards through the transmission between the driving tooth 7 and the connecting arm tooth 4, so that the aim of adjusting the chair back is fulfilled. Compared with the prior art, the chair back adjusting mechanism provided by the embodiment has a simple transmission structure, and can directly lean on the chair back to adjust the chair back when the chair back is adjusted because the knobs 6 are positioned at two sides of the chair back frame 1 and are arranged close to the cushion frame 8, so that whether the chair back is adjusted in place can be better sensed.

It should be noted that the waist portion 2 is an arc waist portion protruding right above the seat cushion frame, so as to better support the waist of the user.

In addition, the two transmission arms 3 are symmetrically arranged at two sides of the waist position 2; connecting arms 9 corresponding to the transmission arms 3 are respectively arranged on two sides of the chair back frame 1, and a corresponding rotation limiting part 5 and a corresponding knob 6 are arranged on each connecting arm 9. The advantage that sets up like this, the user can be according to actual need very convenient adjust the both sides of waist position 2, can adjust the position and the shape of waist position 2 better, the good reliability.

In this embodiment, the driving arm 3 is a discrete component, and the driving arm 3 and the waist portion 2 are fixed by screws or buckles. The connecting arm 9 is integrally formed on the backrest frame 1, and the middle part of the connecting arm 9 is fixedly connected with the cushion frame 8 through a reinforcing bolt 10, so that the connecting arm 9 is ensured to have enough supporting strength. Obviously, according to different actual needs, a person skilled in the art can set the transmission arm 3 and the waist position 2 as an integral molding piece, or set the connecting arm 9 and the backrest frame 1 as separate pieces; the present embodiment is not limited.

Referring to fig. 5, the rotation limiting member 5 is a circular ring member embedded in the seatback frame 1, the inner circumferential edge of the circular ring member is provided with a limiting tooth 5-1 for positioning the knob 6, and the outer circumferential edge of the circular ring member is provided with an engaging protrusion 5-2 for engaging the circular ring member with the seatback frame 1; and a limiting bulge 6-1 matched with the limiting tooth 5-1 is arranged on the inner side of the knob 6.

During actual work, the knob 6 can be plugged in and pulled out to realize the engagement and disengagement of the limiting protrusion 6-1 and the limiting tooth 5-1; when the limiting protrusion 6-1 is engaged with the limiting tooth 5-1, the knob 6 can not rotate; when the limiting protrusion 6-1 is disengaged from the limiting tooth 5-1, the knob 6 can be rotated, and then the front and back positions of the waist 2 can be adjusted; after the waist position 2 is adjusted to the right position, the knob is pressed down to enable the limiting bulge 6-1 to be meshed with the limiting tooth 5-1, and the position of the waist position 2 can be kept unchanged.

In particular, in order to facilitate the operation of the knob 6, it is preferable that a handle position 6-2 protruding outward is further provided on the outer side of the knob 6. In this embodiment, the handle position 6-2 is preferably a straight handle.

As shown in fig. 6, a seat 11 having the above-described back adjustment mechanism is provided. Obviously, besides the chair back adjusting mechanism, other accessories of the chair can be changed or exchanged by those skilled in the art according to actual needs, and such changes or exchanges include various changes or exchanges that are known in the art or can be realized in the future, and will not be described in detail herein.

It will be understood by those skilled in the art from the foregoing description of the structure and principles that the present invention is not limited to the specific embodiments described above, and that modifications and substitutions based on the known art are intended to fall within the scope of the invention, which is defined by the claims and their equivalents. The details not described in the detailed description are prior art or common general knowledge.

Claims

1. A chair back adjustment mechanism, comprising: the chair comprises a chair back frame and a waist position which are assembled together, wherein the top of the waist position is elastically connected with the chair back frame, and the lower side of the waist position is separated from the chair back frame so that the waist position forms a swing structure with adjustable front and back positions;

the waist position is connected with a transmission arm, the transmission arm is provided with transmission arm teeth in strip arrangement, the chair back frame is provided with a rotation limiting part and a knob matched with the rotation limiting part, and the knob is provided with a driving tooth meshed with the transmission arm teeth;

the knobs are located on two sides of the chair back frame and are arranged close to the cushion frame.

2. The chair back adjustment mechanism of claim 1, wherein the lumbar region is an arcuate lumbar region projecting directly above the seat cushion frame.

3. The chair back adjusting mechanism according to claim 1, wherein the number of the transmission arms is two, and the two transmission arms are symmetrically arranged on two sides of the waist position; and connecting arms corresponding to the transmission arms are respectively arranged on two sides of the chair back frame, and each connecting arm is provided with a corresponding rotation limiting part and a corresponding knob.

4. The chair back adjustment mechanism of claim 1, wherein the actuator arm is a separate member and is secured to the lumbar region by a screw or a snap.

5. The chair back adjustment mechanism of claim 3, wherein the connecting arm is integrally formed on the chair back frame, and the middle portion of the connecting arm is further connected and fixed to the seat cushion frame by a reinforcing bolt.

6. The chair back adjusting mechanism according to claim 1, wherein the rotation limiting member is a circular ring member embedded in the chair back frame, a limiting tooth is arranged on an inner circumferential edge of the circular ring member for positioning the knob, and an embedding protrusion is arranged on an outer circumferential edge of the circular ring member for embedding and positioning the circular ring member and the chair back frame; and a limiting bulge matched with the limiting tooth is arranged on the inner side of the knob.

7. The chair back adjustment mechanism of claim 1, wherein an outwardly projecting handle location is provided on an outer side of the knob.

8. The chair back adjustment mechanism of claim 7, wherein the handle position is a slotted handle.

9. A seat having a chair back adjustment mechanism as claimed in any one of claims 1 to 8.