CN221229050U - Sofa convenient to adjust back - Google Patents

Abstract

The utility model relates to the technical field of sofas, in particular to a sofa with a backrest convenient to adjust. The technical proposal comprises: including sofa base, backplate and handrail, the handrail is fixed in sofa base upper end both sides, the backplate passes through the drive shaft and rotates the connection at sofa base rear side, the drive slot has been seted up in the sofa base and with the corresponding position of drive shaft, install drive shaft pivoted driving motor in the drive slot, the flexible groove has been seted up in the backplate and with the corresponding position of handrail, there is flexible pinion rack in the flexible inslot through drive assembly sliding connection. According to the utility model, the driving motor is used for driving the driving shaft to rotate, so that the rapid adjustment of the inclination angle of the sofa backrest is realized, and after the adjustment is finished, the backboard is fixed by using the extension of the telescopic toothed plate, so that the stability after the adjustment is ensured, and the condition that the mechanical damage is easily caused by the fact that the gravity is completely applied to the driving shaft is avoided.

Description

Sofa convenient to adjust back

Technical Field

The utility model relates to the technical field of sofas, in particular to a sofa with a backrest convenient to adjust.

Background

Sofa is a piece of furniture for sitting and lying rest, usually consisting of a cushion, a backrest and armrests, which is one of the common furniture in the living of the home, providing a comfortable seat and rest space.

The traditional sofa backrest is mainly of a fixed connection structure, the structure cannot adjust the inclination angle of the backrest, but the fixed connection has enough stability, so that the service life of the sofa is prolonged, the backrest is of an adjustable structure, the inclination angle of the backrest can be freely adjusted according to personal preference, and the comfort in use is improved.

Disclosure of utility model

The utility model aims to solve the problems in the background art and provides a sofa with a backrest convenient to adjust.

The technical scheme of the utility model is as follows: the utility model provides a sofa convenient to adjust back, includes sofa base, backplate and handrail, the handrail is fixed in sofa base upper end both sides, the backplate passes through the drive shaft rotation and connects at sofa base rear side, the drive slot has been seted up to just corresponding position with the drive shaft in the sofa base, install drive shaft pivoted driving motor in the drive slot, the expansion tank has been seted up in the backplate and with the corresponding position of handrail, there is flexible pinion rack through drive assembly sliding connection in the expansion tank, the handrail inboard just has fixed pinion rack with the corresponding position of flexible pinion rack, flexible pinion rack stretches out the expansion tank and meshes with fixed pinion rack.

Preferably, the driving assembly comprises a servo motor and telescopic blocks, the telescopic blocks are slidably connected to two ends of the telescopic grooves, one ends of the telescopic blocks far away from each other are fixed with the telescopic toothed plates, and the servo motor is fixed at the middle position of the upper ends of the telescopic grooves.

Preferably, the telescopic groove is rotationally connected with a bidirectional screw rod, the middle position of the bidirectional screw rod and the output end of the servo motor are both fixed with bevel gears meshed with each other, and two ends of the bidirectional screw rod are both in threaded connection in the telescopic block.

Preferably, a pair of bearing frames are fixed in the telescopic groove, and the bidirectional screw rod penetrates through the bearing frames and is connected with the bearing frames in a rotating mode.

Preferably, the upper end of the armrest is fixed with a control panel, and the four corners of the bottom of the sofa base are fixed with posts.

Preferably, a worm wheel is fixed at one end of the driving shaft extending into the driving groove, a worm meshed with the worm wheel is rotationally connected in the driving groove, and the driving motor is fixed on the side wall of the driving groove, and the output end of the driving motor is fixed with the worm.

Compared with the prior art, the utility model has the following beneficial technical effects: the driving motor is utilized to drive the driving shaft to rotate, so that the rapid adjustment of the inclination angle of the sofa backrest is realized, and after the adjustment is completed, the back plate is fixed by utilizing the extension of the telescopic toothed plate, so that the stability after the adjustment is ensured, and the condition that the gravity is applied to the driving shaft entirely and is easy to cause mechanical damage is avoided.

Drawings

FIG. 1 is a schematic side sectional view of the present utility model;

FIG. 2 is a schematic view of the internal structure of the back plate according to the present utility model;

FIG. 3 is a schematic diagram of a combined structure of a telescopic block and a bidirectional screw rod according to the present utility model;

Fig. 4 is a schematic diagram of a driving combination structure of a driving motor to a driving shaft according to the present utility model.

Reference numerals: 1. a sofa base; 11. a driving groove; 12. a worm wheel; 13. a worm; 14. a driving motor; 2. a back plate; 21. a drive shaft; 22. a telescopic slot; 23. a retractable toothed plate; 24. a telescopic block; 25. a servo motor; 26. a bevel gear; 27. a bearing bracket; 28. a two-way screw rod; 3. a leg; 4. an armrest; 41. a control panel; 42. and fixing the toothed plate.

Detailed Description

The technical scheme of the utility model is further described below with reference to the attached drawings and specific embodiments.

Examples

As shown in fig. 1-4, the sofa with backrest convenient to adjust provided by the utility model comprises a sofa base 1, a back plate 2 and armrests 4, wherein the armrests 4 are fixed on two sides of the upper end of the sofa base 1, the back plate 2 is rotatably connected to the rear side of the sofa base 1 through a driving shaft 21, a driving groove 11 is formed in the sofa base 1 and at a position corresponding to the driving shaft 21, a driving motor 14 for driving the driving shaft 21 to rotate is arranged in the driving groove 11, a telescopic groove 22 is formed in the back plate 2 and at a position corresponding to the armrests 4, a telescopic toothed plate 23 is slidably connected in the telescopic groove 22 through a driving component, a fixed toothed plate 42 is fixed on the inner side of the armrests 4 and at a position corresponding to the telescopic toothed plate 23, the telescopic toothed plate 23 extends out of the telescopic groove 22 and is meshed with the fixed toothed plate 42, a control panel 41 is fixed on the upper end of the armrests 4, legs 3 are fixed at four corners of the bottom of the sofa base 1, a worm wheel 12 is fixed at one end of the driving shaft 21, a worm wheel 12 is fixed in the driving groove 11, a worm 13 meshed with the worm wheel 12 is rotatably connected in the driving groove 11, the driving motor 14 is fixed on the side wall of the driving groove 11, and the output end is fixed with the worm 13.

The drive assembly includes servo motor 25 and expansion block 24, expansion block 24 sliding connection is in expansion groove 22 both ends, expansion block 24 keeps away from one end mutually and is fixed with flexible pinion rack 23, servo motor 25 is fixed in expansion groove 22 upper end intermediate position, the internal rotation of expansion groove 22 is connected with two-way lead screw 28, two-way lead screw 28 intermediate position and servo motor 25 output all are fixed with intermeshing's bevel gear 26, two-way lead screw 28 both ends all threaded connection are in expansion block 24, expansion groove 22 internal fixation has a pair of bearing frame 27, two-way lead screw 28 wears bearing frame 27 and rotates with bearing frame 27 to be connected.

In this embodiment, the whole device is connected to an external power supply, the control panel 41 on the armrest 4 is utilized to drive and control the driving motor 14, so that the output end drives the worm 13 to rotate, then the worm wheel 12 is utilized to drive the driving shaft 21 to rotate, and then the backboard 2 is driven to rotate, so as to realize the inclination angle adjustment of the sofa backrest, on this basis, the rotation of the output end of the servo motor 25 is utilized, and the transmission of the bevel gear 26 is utilized, so that the bidirectional screw rod 28 can rotate, and then the expansion and contraction of the expansion block 24 are driven, when the end part of the expansion block 24 extends out of the expansion groove 22, the expansion toothed plate 23 can be meshed with the fixed toothed plate 42, and then the backboard 2 is supported at two sides, so that the stability of the backboard 2 is increased, otherwise, the free angle adjustment of the backboard 2 can be carried out in the expansion groove 22, the stability after the backboard 2 is inclined to a designated angle is increased, and the risk of mechanical damage is reduced.

The above-described embodiments are merely a few preferred embodiments of the present utility model, and many alternative modifications and combinations of the above-described embodiments will be apparent to those skilled in the art based on the technical solutions of the present utility model and the related teachings of the above-described embodiments.

Claims (6)

1. The utility model provides a sofa convenient to adjust back, includes sofa base (1), backplate (2) and handrail (4), its characterized in that: the handrail (4) is fixed in sofa base (1) upper end both sides, backplate (2) are rotated through drive shaft (21) and are connected in sofa base (1) rear side, just set up drive slot (11) with drive shaft (21) corresponding position in sofa base (1), install drive shaft (21) pivoted driving motor (14) in drive slot (11), in backplate (2) and with handrail (4) corresponding position set up flexible groove (22), there is flexible pinion rack (23) through drive assembly sliding connection in flexible groove (22), handrail (4) inboard and with flexible pinion rack (23) corresponding position is fixed with fixed pinion rack (42), flexible pinion rack (23) are stretched out flexible groove (22) and are meshed with fixed pinion rack (42).

2. The sofa with the backrest convenient to adjust according to claim 1, wherein the driving assembly comprises a servo motor (25) and telescopic blocks (24), the telescopic blocks (24) are slidably connected to two ends of the telescopic grooves (22), one end, far away from the telescopic blocks (24), of each telescopic block is fixed with the telescopic toothed plate (23), and the servo motor (25) is fixed at the middle position of the upper ends of the telescopic grooves (22).

3. The sofa with the backrest convenient to adjust according to claim 2, wherein the telescopic groove (22) is rotationally connected with a bidirectional screw rod (28), a bevel gear (26) which is meshed with each other is fixed at the middle position of the bidirectional screw rod (28) and the output end of the servo motor (25), and two ends of the bidirectional screw rod (28) are connected in the telescopic block (24) in a threaded mode.

4. A sofa for facilitating the adjustment of a backrest according to claim 3, characterized in that said telescopic slot (22) is internally fixed with a pair of bearing brackets (27), said bidirectional screw (28) being threaded through the bearing brackets (27) and being in rotary connection with the bearing brackets (27).

5. Sofa with backrest convenient to adjust according to claim 1, characterized in that the upper end of the armrest (4) is fixed with a control panel (41), and the four corners of the bottom of the sofa base (1) are fixed with legs (3).

6. Sofa for facilitating the adjustment of a backrest according to claim 1, characterized in that the end of the driving shaft (21) extending into the driving groove (11) is fixed with a worm wheel (12), the driving groove (11) is rotationally connected with a worm (13) meshed with the worm wheel (12), the driving motor (14) is fixed on the side wall of the driving groove (11) and the output end is fixed with the worm (13).