CN213640275U

CN213640275U - Sofa with adjustable backrest

Info

Publication number: CN213640275U
Application number: CN202021510445.1U
Authority: CN
Inventors: 詹慧兰
Original assignee: Foshan Shunde Dingzun Furniture Co Ltd
Current assignee: Foshan Shunde Dingzun Furniture Co Ltd
Priority date: 2020-07-27
Filing date: 2020-07-27
Publication date: 2021-07-09
Anticipated expiration: 2030-07-27

Abstract

The utility model discloses a sofa with adjustable backrest, which comprises a base, a bottom frame fixedly arranged in the base, a rotating frame fixedly arranged at the top of the bottom frame, a rotating block hinged on the rotating frame, a connecting piece fixedly arranged at the top of the rotating block and a backrest fixedly arranged at the top of the connecting piece, a bearing seat is fixedly arranged on the side wall of the bottom frame, a lifting sleeve is arranged on the bearing seat in a matching way, the lifting sleeve exceeds one section of circumferential surface of the bearing seat and is connected with a driven gear, a threaded through hole is formed in the top of the lifting sleeve, a lifting rod is arranged in the lifting sleeve in a matching way, the top of the lifting rod is connected with a support frame, two lifting rods are connected with two ends of the support frame, a support roller is movably sleeved; the rotary block connected with the backrest is supported by the support frame and the support roller, the height of the support frame is controlled by the lifting rod and the lifting sleeve, and then the rotating angle of the rotary block is controlled, so that the backrest is adjusted and the backrest is effectively supported.

Description

Sofa with adjustable backrest

Technical Field

The utility model relates to the technical field of articles for daily use, in particular to a sofa with an adjustable backrest.

Background

The sofa is a carrier for people to have a rest and relax, the comfort of the sofa is widely used, along with improvement and technical development of living standard of people, the sofa is no longer satisfied with a straight backrest sofa, but the sofa is required to have the function of adjusting the inclination angle of a backrest like an office chair, the existing sofa is used for adjusting the angle of the backrest, the backrest is rotatably installed on a rod, the rod is installed at the top of a sofa base, the adjustment of the angle of the backrest is realized by directly and manually rotating the backrest, but the backrest cannot be fixed by the adjusting mode of the angle of the backrest, the backrest can only be pressed by the back of a user, and the user cannot feel comfortable.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a sofa with adjustable back to prior art not enough, the utility model provides a problem that the angle can't be fixed when having solved the back and adjusting.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: a sofa with an adjustable backrest comprises a base, an underframe fixedly arranged in the base, a rotating frame fixedly arranged at the top of the underframe, a rotating block hinged on the rotating frame, a connecting piece fixedly arranged at the top of the rotating block and a backrest fixedly arranged at the top of the connecting piece, wherein a bearing seat is fixedly arranged on the side wall of the underframe, a lifting sleeve is arranged on the bearing seat in a matched manner, the lifting sleeve exceeds one section of circumferential surface of the bearing seat and is connected with a driven gear, a threaded through hole is formed in the top of the lifting sleeve, a lifting rod is arranged in the lifting sleeve in a matched manner by threads, the top of the lifting rod is connected with a support frame, two lifting rods are connected with two ends of the support frame, a support roller is movably sleeved on.

(III) advantageous effects

The utility model provides a sofa with adjustable backrest. The method has the following beneficial effects:

this sofa with adjustable back supports the rotatory piece of connecting the back through support frame and supporting roll, through the height of lifter and lift sleeve control support frame, and then the turned angle of control rotatory piece realizes the regulation of back and the effective support of back.

Drawings

Fig. 1 is a front view of the structure of the present invention.

Fig. 2 is a cross-sectional view of the right side view of the structure of the present invention.

Fig. 3 is an enlarged view of the area a in fig. 2.

Fig. 4 is a schematic view of the internal structure of the base in the structure of the present invention.

Fig. 5 is a sectional view of the lifting sleeve in the structure of the present invention.

In the figure: 1. a base; 2. a backrest; 3. a chassis; 4. a rotating frame; 5. rotating the block; 6. a connecting member; 7. a limiting frame; 8. a support roller; 9. a support frame; 10. a bearing seat; 11. a lifting sleeve; 12. a control box; 13. a control shaft; 14. a transmission gear; 15. a lifting rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-5, the utility model provides a technical solution: a sofa with an adjustable backrest comprises a base 1, an underframe 3 fixedly installed in the base 1, a rotating frame 4 fixedly installed at the top of the underframe 3, a rotating block 5 hinged to the rotating frame 4, a connecting piece 6 fixedly installed at the top of the rotating block 5 and a backrest 2 fixedly installed at the top of the connecting piece 6, a bearing seat 10 is fixedly installed on the side wall of the underframe 3, a lifting sleeve 11 is installed on the bearing seat 10 in a bearing fit mode, one section of circumferential surface, exceeding the bearing seat 10, of the lifting sleeve 11 is connected with a driven gear, a threaded through hole is formed in the top of the lifting sleeve 11, a lifting rod 15 is arranged in the lifting sleeve 11 in a threaded fit mode, the top of the lifting rod 15 is connected with a support frame 9, two ends of the support frame 9 are connected with two lifting rods 15, a support roller 8 is movably sleeved on the support frame.

Preferably, the side wall of the base 1 is provided with an opening, a control box 12 is fixedly arranged at the opening, a control shaft 13 is rotatably arranged in the control box 12 through a bearing, the control shaft 13 is connected with a transmission gear 14, and the transmission gear 14 is in meshing transmission with the driven gear; the angle adjustment of the backrest 2 can be controlled by rotating the control shaft 13 outside the base 1, so that the adjustment of the backrest 2 is more convenient.

Preferably, the top of the bottom frame 3 is fixedly provided with a limiting frame 7, and the limiting frame 7 is arranged on the side surface of the rotating block 5 far away from the supporting roller 8; the backrest 2 is prevented from falling down from the front, and the backrest 2 is limited.

Preferably, the transmission gear 14 is simultaneously meshed with two driven gears arranged on one side of the base frame 3; so that the two lifting rods 15 can move up and down simultaneously to realize the stable support of the backrest 2.

Preferably, the cross section of the top end of the control shaft 13 is a hexagon which is convenient for clamping; it is convenient to use a wrench to rotate the control shaft 13.

Preferably, the circumferential surface of the supporting roller 8 is covered with a layer of wear-resistant plastic; the wear resistance of the support roller 8 is increased, and the contact area between the support roller 8 and the rotary block 5 is increased, so that the support can be stabilized.

During the use, rotate control shaft 13 through the spanner, control shaft 13 drives drive gear 14 and rotates, drive gear 14 drives two lift sleeves 11 of support frame 9 bottom simultaneously and rotates, two lifter 15 descend simultaneously along with two lift sleeves 11, rotatory piece 5 rotates around swivel mount 4, connecting piece 6 drives back 2 and rotates, realize the angle modulation of back 2 promptly, rotate to the target angle when back 2, stop rotating control shaft 13, support frame 9 cooperates support cylinder 8 to support rotatory piece 5, and then realize effectively supporting back 2. And those not described in detail in this specification are well within the skill of those in the art.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A sofa with an adjustable backrest is characterized in that: comprises a base (1), an underframe (3) fixedly arranged in the base (1), a rotating frame (4) fixedly arranged at the top of the underframe (3), a rotating block (5) hinged on the rotating frame (4), a connecting piece (6) fixedly arranged at the top of the rotating block (5) and a backrest (2) fixedly arranged at the top of the connecting piece (6), wherein a bearing seat (10) is fixedly arranged on the side wall of the underframe (3), a lifting sleeve (11) is arranged on the bearing seat (10) in a bearing fit manner, the lifting sleeve (11) exceeds one section of circumferential surface of the bearing seat (10) to be connected with a driven gear, a threaded through hole is formed in the top of the lifting sleeve (11), a lifting rod (15) is arranged in the lifting sleeve (11) in a threaded fit manner, the top of the lifting rod (15) is connected with a support frame (9), two lifting rods (15) are connected with two ends of the support frame (9), a support roller (, the support roller (8) is in contact with the circumferential surface of the rotating block (5).

2. The sofa of claim 1, wherein the back rest is adjustable by: the side wall of the base (1) is provided with an opening, a control box (12) is fixedly arranged at the opening, a control shaft (13) is rotatably arranged in the control box (12) through a bearing, the control shaft (13) is connected with a transmission gear (14), and the transmission gear (14) is in meshing transmission with the driven gear.

3. The sofa of claim 1, wherein the back rest is adjustable by: and a limiting frame (7) is fixedly arranged at the top of the bottom frame (3), and the limiting frame (7) is arranged on the side surface of the rotating block (5) far away from the supporting roller (8).

4. The sofa of claim 2, wherein the back rest is adjustable by: the transmission gear (14) is simultaneously meshed with two driven gears arranged on one side of the bottom frame (3).

5. The sofa of claim 2, wherein the back rest is adjustable by: the cross section of the top end of the control shaft (13) is set to be a hexagon convenient to clamp.

6. The sofa of claim 1, wherein the back rest is adjustable by: the circumferential surface of the supporting roller (8) is covered with a layer of wear-resistant plastic.