CN216675253U

CN216675253U - Backrest adjusting mechanism

Info

Publication number: CN216675253U
Application number: CN202120823102.9U
Authority: CN
Inventors: 郑春华
Original assignee: Shenzhen Xbl Hardware Co ltd
Current assignee: Shenzhen Xbl Hardware Co ltd
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2022-06-07
Anticipated expiration: 2031-04-21

Abstract

The utility model provides a backrest adjusting mechanism which comprises a mounting seat, an adjusting seat and a connecting rod assembly, wherein the connecting rod assembly comprises a first connecting rod group and a second connecting rod group, the first connecting rod group is hinged with the mounting seat and the adjusting seat respectively, the second connecting rod group is hinged with the adjusting seat and the first connecting rod group respectively, the first connecting rod group and the second connecting rod group move simultaneously, when the first connecting rod group and the second connecting rod group move, the adjusting seat overturns, and the connecting rod assembly further comprises a third connecting rod group used for limiting the moving range of the first connecting rod group and/or the second connecting rod group. According to the utility model, the first connecting rod group drives the adjusting seat to ascend and descend, the second connecting rod group drives the adjusting seat to overturn under the driving of the first connecting rod group, the third connecting rod group restricts the moving ranges of the first connecting rod group and the second connecting rod group, the stability of the mechanism is increased, and the adjustment of the height and the angle of the adjusting seat is realized. The utility model has stable structure and lower production cost.

Description

Backrest adjusting mechanism

Technical Field

The utility model relates to the field of hardware accessories, in particular to a backrest adjusting mechanism.

Background

Nowadays more and more furniture backrests have a tilt adjustment function, in particular sofas. The back of the sofa is required to be adjusted according to the use requirements of users in many times, so that the comfort of the sofa is improved. The backrest of some seats, sofas or beds can be folded and lifted when in use, and the backrest and the seat body are all arranged between the backrest and the seat body to realize the purpose. The prior art reclining mechanism still has room for further simplification and reduction in manufacturing cost, and thus the prior art needs to be improved and enhanced.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned deficiencies of the prior art, it is an object of the present invention to provide a backrest adjustment mechanism that is relatively simple in construction.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a backrest adjusting mechanism which comprises a mounting seat, an adjusting seat and a connecting rod assembly, wherein the connecting rod assembly comprises a first connecting rod group and a second connecting rod group, the first connecting rod group is hinged with the mounting seat and the adjusting seat respectively, the second connecting rod group is hinged with the adjusting seat and the first connecting rod group respectively, the first connecting rod group and the second connecting rod group move simultaneously, when the first connecting rod group and the second connecting rod group move, the adjusting seat overturns, and the connecting rod assembly further comprises a third connecting rod group used for limiting the moving range of the first connecting rod group and/or the second connecting rod group.

Further, back guiding mechanism, first link group includes first member and second member, the second link group includes third member and fourth member, the one end of first member with the mount pad is articulated, the other end of first member with the one end of second member is articulated, the other end of second member with the adjustment seat is articulated, the one end of third member with the one end of fourth member is articulated, the other end of fourth member with the adjustment seat is articulated, second member and third member are articulated each other.

Further, the backrest adjusting mechanism, the third connecting rod group includes a fifth rod and a sixth rod, one end of the fifth rod is hinged to the other end of the third rod, the other end of the fifth rod is hinged to one end of the sixth rod, the other end of the sixth rod is hinged to the mounting seat, and the hinged position of the second rod and the third rod is located between the two ends of the second rod and between the two ends of the third rod.

Furthermore, the backrest adjusting mechanism, the fifth rod and the first rod are hinged to each other, and the hinged position of the fifth rod and the first rod is located between two ends of the first rod and between two ends of the fifth rod.

Further, in the backrest adjusting mechanism, the hinge joint of the second rod and the third rod is located in the middle of the third rod.

Further, in the backrest adjusting mechanism, the hinged position of the fifth rod and the first rod is located in the middle of the first rod.

Further, in the backrest adjusting mechanism, the hinged position of the fifth rod and the first rod is located in the middle of the fifth rod.

In a preferred embodiment, the backrest adjusting mechanism has a limiting portion disposed on the adjusting seat.

Furthermore, the backrest adjusting mechanism, the spacing portion is a spacing post, and the spacing post is located between the second rod piece and the hinge joint of the fourth rod piece and the adjusting seat respectively.

Further, the backrest adjusting mechanism, the second bar is provided with an abutting portion which is matched with the fourth bar, or the fourth bar is provided with an abutting portion which is matched with the second bar.

Compared with the prior art, the utility model provides a backrest adjusting mechanism which comprises an installation seat, an adjusting seat and a connecting rod assembly, wherein the connecting rod assembly comprises a first connecting rod group and a second connecting rod group, the first connecting rod group is hinged with the installation seat and the adjusting seat respectively, the second connecting rod group is hinged with the adjusting seat and the first connecting rod group respectively, the first connecting rod group and the second connecting rod group move simultaneously, when the first connecting rod group and the second connecting rod group move, the adjusting seat overturns, and the connecting rod assembly further comprises a third connecting rod group used for limiting the moving range of the first connecting rod group and/or the second connecting rod group. According to the utility model, the first connecting rod group drives the adjusting seat to ascend and descend, and the second connecting rod group drives the adjusting seat to overturn under the driving of the first connecting rod group, so that the height and the angle of the adjusting seat can be adjusted. The utility model has simple structure, smooth operation, compact and stable structure and lower production cost.

Drawings

Fig. 1 is a schematic structural view of a deployed state of a backrest adjustment mechanism provided by the present invention.

Fig. 2 is a first schematic structural view of a backrest adjustment mechanism according to the present invention in a contracted state.

Fig. 3 is a second schematic structural view of the backrest adjustment mechanism according to the present invention in a contracted state.

Reference numerals:

mounting base 1

Adjusting seat 2

Connecting rod assembly 3

First link group 31

Second linkage 32

Third linkage 33

First pin 301

Second pole 302

Third bar 303

Fourth rod 304

Fifth bar 305

The sixth pin 306

Stopper 21

Abutting part 310

Drive connection member 34

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and do not limit the utility model.

It will be understood that when an element is referred to as being "on," "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

It should be noted that the terms of orientation such as left, right, up and down in the embodiments of the present invention are only relative to each other or are referred to the normal use state of the product, and should not be considered as limiting.

As shown in fig. 1, 2 and 3, the present invention provides a backrest adjustment mechanism, which includes a mounting base 1, an adjustment base 2 and a link assembly 3, wherein the link assembly 3 includes a first link group 31 and a second link group 32, the first link group 31 is hinged to the mounting base 1 and the adjustment base 2, the second link group 32 is hinged to the adjustment base 2 and the first link group 31, the first link group 31 and the second link group 32 are simultaneously movable, when the first link group 31 and the second link group 32 are movable, the adjustment base 2 is turned over, and the link assembly 3 further includes a third link group 33 for limiting a movable range of the first link group 31 and/or the second link group 32. According to the utility model, the first connecting rod group 31 drives the adjusting seat 2 to ascend and descend, meanwhile, the second connecting rod group 32 drives the adjusting seat 2 to overturn under the driving of the first connecting rod group 31, the third connecting rod group 33 restricts the movable ranges of the first connecting rod group 31 and the second connecting rod group 32, the stability of the mechanism is increased, and thus the adjustment of the height and the angle of the adjusting seat 2 is realized. The utility model has simple structure, smooth operation, compact and stable structure and lower production cost.

Further, in the backrest adjustment mechanism provided by the present invention, the first link group 31 includes a first link 301 and a second link 302, the second link group 32 includes a third link 303 and a fourth link 304, one end of the first link 301 is hinged to the mounting base 1, the other end of the first link 301 is hinged to one end of the second link 302, the other end of the second link 302 is hinged to the adjustment base 2, one end of the third link 303 is hinged to one end of the fourth link 304, the other end of the fourth link 304 is hinged to the adjustment base 2, the second link 302 is hinged to the third link 303, and a hinge point of the second link 302 and the third link 303 is located between two ends of the second link 302 and between two ends of the third link 303. Further, the third linkage 33 includes a fifth rod 305 and a sixth rod 306, one end of the fifth rod 305 is hinged to the other end of the third rod 303, the other end of the fifth rod 305 is hinged to one end of the sixth rod 306, the other end of the sixth rod 306 is hinged to the mounting base 1, and the hinged position between the second rod 302 and the third rod 303 is located between the two ends of the second rod 302 and between the two ends of the third rod 303. The second rod 302, the fourth rod 304 and the fifth rod 305 are in the same horizontal plane, and when the whole mechanism is contracted to a certain extent, the second rod 302, the fourth rod 304 and the fifth rod 305 will contact with each other to hinder the continuous movement of the connecting rod assembly 3, so that the adjustment seat 2 can only reciprocate within a certain range. In this embodiment, the fifth rod 305 is hinged to the first rod 301, and the hinged portion of the fifth rod 305 and the first rod 301 is located between two ends of the first rod 301 and between two ends of the fifth rod 305. Specifically, the hinge joint of the second rod 302 and the third rod 303 is located in the middle of the third rod 303, the hinge joint of the fifth rod 305 and the first rod 301 is located in the middle of the first rod 301, and the hinge joint of the fifth rod 305 and the first rod 301 is located in the middle of the fifth rod 305, so as to ensure smooth and stable operation of the mechanism.

Preferably, in order to further improve the structural stability of the present invention, the adjusting seat 2 is provided with a limiting portion. Specifically, in this embodiment, the limiting portion 21 is a limiting column, and the limiting column is located between the second rod 302 and the hinged portion of the fourth rod 304 and the adjusting seat 2. The limiting column of this embodiment is mainly used for virtual restraint, the hinged end of the fourth rod 304 and the adjusting seat 2 of this embodiment is in arc transition arrangement, and when the fourth rod 304 rotates, the limiting column is always close to the edge of the hinged end of the fourth rod 304 and the adjusting seat 2. Further, in the backrest adjustment mechanism provided by the present invention, the second rod 302 is provided with an interference portion 310 engaged with the fourth rod 304, or the fourth rod 304 is provided with an interference portion 310 engaged with the second rod 302. Specifically, in this embodiment, the interference portion 310 is located on the second rod 302 and is in the shape of an arc groove, so that the contact and the cooperation between the second rod 302 and the fourth rod 304 during the operation of the mechanism are more stable, and the stability of the structure of the present invention is further ensured.

In this embodiment, a driving connection member 34 is provided, the driving connection member 34 is installed on the second rod 302, specifically, the driving connection member 34 is installed between the second rod 302 and the hinged positions of the first rod 301 and the third rod 303, and the driving connection member 34 is used for connecting with an external driving mechanism to drive the backrest adjustment mechanism to automatically adjust

As shown in fig. 1 and 2, when the backrest adjustment mechanism is in a contracted state, the driving connection member 34 drives the second rod 302 to move upward to drive the adjustment seat 2 to move upward, at this time, the first rod 301 rotates clockwise in the view angle shown in fig. 2, the fifth rod 305 moves upward along the guide portion 11 under the pushing of the first rod 301, the third rod 303 moves upward and rotates clockwise under the pushing of the fifth rod 305 and the second rod 302, the fourth rod 304 moves upward under the pushing of the third rod 303, and the adjustment seat 2 is pushed to turn around the hinge joint of the second rod 302 and the adjustment seat 2, so as to achieve the lifting and angle adjustment of the adjustment seat 2.

As shown in fig. 1 and 3, when the sixth rod 306 rotates counterclockwise to a certain degree, the end of the fourth rod 304 hinged to the adjustment seat 2 abuts against the second rod 302, and at this time, the adjustment seat 2 reaches the lowest point, which is the contraction process of the backrest adjustment mechanism, and the expansion process is the reverse motion of the contraction process, and is not repeated here.

In summary, the lifting and angle adjustment of the adjustment seat can be realized, the first link group drives the adjustment seat to lift and descend, the second link group drives the adjustment seat to turn over under the driving of the first link group, the third link group restricts the movable ranges of the first link group and the second link group, the stability of the mechanism is increased, and the height and angle of the adjustment seat are adjusted. The utility model has simple structure, stable operation, compact and stable structure and lower production cost.

It should be understood that equivalents and modifications may be made thereto by those of ordinary skill in the art, and all such modifications and alterations are intended to fall within the scope of the appended claims.

Claims

1. The utility model provides a backrest adjustment mechanism, includes mount pad (1), adjustment seat (2) and link assembly (3), its characterized in that, link assembly (3) include first link group (31) and second link group (32), first link group (31) respectively with mount pad (1) and adjustment seat (2) are articulated, second link group (32) respectively with adjustment seat (2) and first link group (31) are articulated, work as when first link group (31) and second link group (32) move about, adjustment seat (2) upset, link assembly (3) still include third link group (33) that are used for restricting first link group (31) and/or second link group (32) home range.

2. The backrest adjustment mechanism according to claim 1, wherein the first link group (31) comprises a first link (301) and a second link (302), the second link group (32) comprises a third link (303) and a fourth link (304), one end of the first link (301) is hinged to the mounting seat (1), the other end of the first link (301) is hinged to one end of the second link (302), the other end of the second link (302) is hinged to the adjustment seat (2), one end of the third link (303) is hinged to one end of the fourth link (304), the other end of the fourth link (304) is hinged to the adjustment seat (2), and the second link (302) and the third link (303) are hinged to each other.

3. The backrest adjustment mechanism according to claim 2, wherein the third linkage (33) comprises a fifth rod (305) and a sixth rod (306), one end of the fifth rod (305) is hinged to the other end of the third rod (303), the other end of the fifth rod (305) is hinged to one end of the sixth rod (306), the other end of the sixth rod (306) is hinged to the mounting seat (1), and the hinge point of the second rod (302) and the third rod (303) is located between the two ends of the second rod (302) and between the two ends of the third rod (303).

4. The backrest adjustment mechanism according to claim 3, characterized in that the fifth lever (305) and the first lever (301) are hinged to each other, and the hinge of the fifth lever (305) and the first lever (301) is located between the two ends of the first lever (301) and between the two ends of the fifth lever (305).

5. The backrest adjustment mechanism according to claim 4, characterized in that the hinge joint of the second lever (302) and the third lever (303) is located in the middle of the third lever (303).

6. The backrest adjustment mechanism according to claim 5, characterized in that the hinge of the fifth lever (305) with the first lever (301) is located in the middle of the first lever (301).

7. The backrest adjustment mechanism according to claim 6, characterized in that the hinge of the fifth lever (305) with the first lever (301) is located in the middle of the fifth lever (305).

8. The backrest adjusting mechanism according to any one of claims 2-7, characterized in that the adjusting seat (2) is provided with a limiting part (21).

9. The backrest adjustment mechanism according to claim 8, wherein the limiting portion (21) is a limiting post located between the hinges of the second rod (302) and the fourth rod (304) and the adjustment seat (2).

10. The backrest adjustment mechanism according to claim 9, characterized in that the second lever (302) is provided with an interference portion (310) cooperating with the fourth lever (304), or the fourth lever (304) is provided with an interference portion (310) cooperating with the second lever (302).