Sofa capable of adjusting angle of backrest

Abstract

The utility model discloses a sofa capable of adjusting the angle of a backrest. The sofa comprises a frame, a cushion and the backrest, hinges are arranged at the two ends of the rear side of the cushion, the backrest is movably connected with the cushion through the hinges, limiting sliding grooves are symmetrically formed in the two sides of the inner wall of the frame, limiting sliding blocks are movably installed above the two sides of the backrest through rotating shafts, sliding blocks are fixedly installed on the rear side of the bottom of the cushion, and a sliding groove is formed in the center of the bottom of the frame. The cushion and the backrest are mounted on the inner side of the frame, and the limiting sliding block and the sliding block are movably mounted in the limiting sliding groove and the sliding groove respectively. The stepping motor can be controlled to rotate through one key, so that the sliding block is driven to slide in the sliding groove to achieve front-and-back movement of the cushion, the backrest can be driven to incline forwards in the process to complete angle adjustment work, use flexibility and convenience are greatly improved, the backrest inclines forwards during adjustment, the rear space cannot be occupied, and use is convenient. Therefore, the back part can be tightly attached to the wall surface for use, and does not occupy too much indoor space.

Description

Technical Field

[0001] The utility model relates to the technical field of furniture, in particular to a sofa with adjustable backrest angle. Background Art

[0002] A sofa is a piece of furniture, usually used in the living room or sitting room, for sitting or lying. It is usually composed of cushions and a support structure, and can have different shapes, sizes and styles. Sofas usually have armrests and backrests, providing comfortable support. Their designs and materials vary, from leather to fabric, from modern to traditional, and there are various choices. People rest, read, watch TV or chat with family and friends on the sofa;

[0003] However, current sofas often cannot achieve the function of adjusting the backrest angle. Therefore, people often cannot adjust to a suitable and comfortable angle for use, and there is inconvenience in terms of usage flexibility, which affects the comfort of people's use. Secondly, sofas with adjustable angles on the market often have their backrests tilt backward when adjusting, occupying space, so they often cannot be placed against the wall for use and are likely to occupy too much space.

[0004] Therefore, how to provide a sofa with adjustable backrest angle is an urgent problem to be solved by those skilled in the art. Summary of the Utility Model

[0005] An object of the utility model is to provide a sofa with adjustable backrest angle. The utility model can control a stepper motor to rotate with one key, thereby driving a slider to slide in a chute to realize the front-back movement of the seat cushion. During this process, the backrest can be driven to tilt forward to complete the angle adjustment work, greatly improving the usage flexibility and convenience. Moreover, when the backrest is adjusted, it tilts forward and does not occupy the rear space. Therefore, it can be placed against the wall with the back against the wall and does not occupy too much indoor space.

[0006] A sofa with adjustable backrest angle according to an embodiment of the utility model includes a frame, a seat cushion and a backrest;

[0007] Hinges are provided at both ends of the rear side of the seat cushion, and the backrest is movably connected to the seat cushion through the hinges. Limiting chutes are symmetrically opened on both sides of the inner wall of the frame. Limiting sliders are movably installed above both sides of the backrest through rotating shafts. A slider is fixedly installed at the rear side of the bottom of the seat cushion. A chute is opened in the middle of the bottom of the frame. The seat cushion and the backrest are installed inside the frame, and the limiting sliders and the slider are respectively movably installed in the limiting chute and the chute;

[0008] A motor slot is opened in the middle of the lower part of the rear side of the frame. A stepper motor is fixedly installed in the motor slot. A lead screw is rotatably installed in the chute. A threaded hole is penetrated through the slider.

[0009] Further, brackets are symmetrically and fixedly installed at the front ends of both sides of the seat cushion, and armrests are fixedly installed at the front ends of the brackets.

[0010] Further, through holes are symmetrically formed in both sides of the bottom of the frame. Columns are fixedly installed at the four corners of the bottom of the seat cushion, and the two columns on both sides respectively penetrate through the through holes. Rollers are movably installed at the bottoms of the columns.

[0011] Further, pulleys are movably installed inside both sides of the limit slider.

[0012] Further, a maintenance cover plate is detachably installed on the rear wall of the frame and on one side of the motor slot.

[0013] Further, the output shaft of the stepper motor is in transmission connection with the lead screw. The lead screw penetrates through the threaded hole, and the lead screw is in threaded engagement with the threaded hole.

[0014] Further, grooves are symmetrically formed at the tops of both sides of the frame, and the armrests are movably embedded in the grooves.

[0015] The beneficial effects of the present utility model are as follows:

[0016] When the stepper motor of the present utility model is started, it can drive the lead screw to rotate inside the threaded hole of the slider, thereby driving the slider and the seat cushion to move forward. When the seat cushion moves forward, it can drive the backrest to tilt forward through the hinge. At this time, the limit slider slides in the limit chute to ensure the stability when the backrest tilts forward. After adjusting to a suitable angle, just stop the stepper motor. When resetting, only need to control the stepper motor to drive the lead screw to rotate in the reverse direction. Its adjustment method is simple and convenient, and the overall stability is strong after adjustment. And when adjusting, the backrest will not occupy space backward. Therefore, this sofa can be placed close to the wall for use. Description of the Drawings

[0017] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0018] Figure 1 is a front view structural schematic diagram of a sofa for adjusting the backrest angle proposed by the present utility model;

[0019] Figure 2 is a rear view maintenance cover removal structural schematic diagram of a sofa for adjusting the backrest angle proposed by the present utility model;

[0020] Figure 3 is a split structural schematic diagram of a sofa for adjusting the backrest angle proposed by the present utility model;

[0021] Figure 4Schematic top view structure of the frame of a sofa for adjusting the backrest angle proposed by the present utility model.

[0022] In the figure: 1, frame; 2, seat cushion; 3, backrest; 4, perforation; 5, motor slot; 6, maintenance cover plate; 7, stepper motor; 8, chute; 9, lead screw; 10, support pillar; 11, roller; 12, slider; 13, screw hole; 14, bracket; 15, armrest; 16, limit slider; 17, pulley; 18, limit chute; 19, hinge; 20, groove. Detailed implementation mode

[0023] Now, the present utility model will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0024] Reference Figure 1 , Figure 3 and Figure 4 , a sofa for adjusting the backrest angle, comprising a frame 1, a seat cushion 2 and a backrest 3;

[0025] At both ends of the rear side of the seat cushion 2, hinges 19 are provided, and the backrest 3 is movably connected to the seat cushion 2 through the hinges 19. On both sides of the inner wall of the frame 1, limit chutes 18 are symmetrically opened. Above both sides of the backrest 3, limit sliders 16 are movably installed through rotating shafts. At the rear side of the bottom of the seat cushion 2, a slider 12 is fixedly installed. In the middle of the bottom of the frame 1, a chute 8 is opened. The seat cushion 2 and the backrest 3 are installed inside the frame 1, and the limit sliders 16 and the slider 12 are respectively movably installed in the limit chute 18 and the chute 8;

[0026] Among them, at both front ends of both sides of the seat cushion 2, brackets 14 are symmetrically and fixedly installed. At the front end of the bracket 14, an armrest 15 is fixedly installed. The armrest 15 is fixedly installed on both sides of the seat cushion 2 through the bracket 14, and the armrest 15 can move with the seat cushion 2;

[0027] Secondly, perforations 4 are symmetrically and penetratingly opened on both sides of the bottom of the frame 1. At the four corners of the bottom of the seat cushion 2, support pillars 10 are fixedly installed, and the two support pillars 10 on both sides respectively penetrate through the perforations 4. At the bottom of the support pillar 10, a roller 11 is movably installed. The roller 11 contacts the ground for support. When the seat cushion 2 reciprocates back and forth, the roller 11 can roll on the ground. At this time, the support pillar 10 can reduce the friction force during its movement while ensuring the support for the seat cushion 2; Inside both sides of the limit slider 16, pulleys 17 are movably installed. The limit slider 16 can move up and down in the limit chute 18. Therefore, the setting of the pulley 17 can greatly reduce the friction force when the limit slider 16 moves in the limit chute 18, ensuring the overall smoothness during adjustment;

[0028] In addition, grooves 20 are symmetrically formed at the top on both sides of the frame 1. The armrest 15 is movably embedded in the groove 20. In the default state, the armrest 15 can be embedded in the groove 20 to achieve hiding. When the seat cushion 2 moves forward, the armrest 15 can move forward in the groove 20 accordingly.

[0029] In this embodiment, when the slider 12 moves forward in the chute 8, it can drive the seat cushion 2 to move forward. At this time, the hinge 19 can drive the backrest 3 to tilt forward. At the same time, the limit slider 16 will move downward in the limit chute 18. Since the limit slider 16 can rotate flexibly, it will not affect the forward tilt of the backrest 3, and the backrest 3 moves downward along the frame 1, thereby completing the adjustment of the angle of the backrest 3 so that it can be seated and reclined, and can be adjusted to a suitable angle for people to rest.

[0030] Reference Figure 2 、 Figure 3 and Figure 4 , a motor slot 5 is centrally formed at the lower part of the rear side of the frame 1. A stepper motor 7 is fixedly installed in the motor slot 5. A lead screw 9 is rotatably installed in the chute 8. A threaded hole 13 is formed through the slider 12.

[0031] Among them, the output shaft of the stepper motor 7 is in transmission connection with the lead screw 9. The lead screw 9 penetrates through the threaded hole 13, and the lead screw 9 is in threaded engagement with the threaded hole 13. The stepper motor 7 can drive the lead screw 9 to rotate in the threaded hole 13. When the lead screw 9 rotates clockwise, it can drive the slider 12 to move forward in the chute 8. On the contrary, when the lead screw 9 rotates counterclockwise, it can drive the slider 12 to move backward.

[0032] Secondly, a maintenance cover plate 6 is detachably installed on the rear wall of the frame 1 and on one side of the motor slot 5. The maintenance cover 6 can be fixedly installed on the rear wall of the frame 1 through bolt fasteners, which can protect the stepper motor 7 inside the motor slot 5.

[0033] In this embodiment, when the stepper motor 7 is started, it can drive the lead screw 9 to rotate in the threaded hole 13 inside the slider 12, thereby driving the slider 12 to slide back and forth in the chute 8, realizing the forward and backward movement of the seat cushion 2. When the seat cushion moves forward, it can drive the backrest 3 to tilt forward and increase the angle. On the contrary, it can drive the backrest 3 to reduce the angle, enabling it to achieve electric adjustment without manual operation.

[0034] Working principle: People can rest or work on the sofa. When it is necessary to adjust the angle of the backrest 3, the stepper motor 7 can be started to drive the lead screw 9 to rotate clockwise within the internal threaded hole 13 of the slider 12. At this time, the slider 12 can move forward within the chute 8, and at this time, the seat cushion 2 can move forward within the frame 1. At the same time, the backrest 3 connected to the seat cushion 2 through the hinge 19 can tilt forward, and the two-sided limit sliders 16 can move downward within the limit chute 18. After the backrest 3 tilts forward to an appropriate angle, the stepper motor 7 can be shut down. During the forward movement of the seat cushion 2, its support column 10 and the bottom roller 11 can move forward within the through hole 4 to ensure that the seat cushion 2 can always be supported by the support column 10 and the roller 11, ensuring the stability of the force received by it. And the roller 11 can roll on the ground with relatively low friction. When the seat cushion 2 drives the backrest 3 to adjust the angle forward, its armrest 15 can move forward with the seat cushion 2 for use when people lie down.

[0035] It can be understood that the driving mode of the stepper motor in the present utility model can be driven by an external power cord, and the control of the stepper motor can be controlled by a main control system, and its control principle can be achieved by existing control technologies. The model of the stepper motor is not limited to a single type and can be the types existing in the market suitable for the present utility model.

[0036] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. A sofa for adjusting the backrest angle, characterized in that, It includes a frame (1), a seat cushion (2) and a backrest (3); At both ends of the rear side of the seat cushion (2), hinges (19) are provided. The backrest (3) is movably connected to the seat cushion (2) through the hinges (19). On both sides of the inner wall of the frame (1), limiting sliding grooves (18) are symmetrically opened. Above both sides of the backrest (3), limiting sliding blocks (16) are movably installed through rotating shafts. At the rear side of the bottom of the seat cushion (2), a sliding block (12) is fixedly installed. In the middle of the bottom of the frame (1), a sliding groove (8) is opened. The seat cushion (2) and the backrest (3) are installed inside the frame (1), and the limiting sliding blocks (16) and the sliding block (12) are respectively movably installed in the limiting sliding grooves (18) and the sliding groove (8); In the middle of the lower part of the rear side of the frame (1), a motor slot (5) is opened. A stepping motor (7) is fixedly installed in the motor slot (5). A lead screw (9) is rotatably installed in the sliding groove (8). A threaded hole (13) is penetrated and opened in the sliding block (12).

2. The sofa for adjusting the backrest angle according to claim 1, wherein On both sides of the front end of the seat cushion (2), brackets (14) are symmetrically and fixedly installed. At the front end of the brackets (14), armrests (15) are fixedly installed.

3. The sofa for adjusting the backrest angle according to claim 1, wherein, On both sides of the bottom of the frame (1), through holes (4) are symmetrically penetrated. At the four corners of the bottom of the seat cushion (2), support columns (10) are fixedly installed, and the two support columns (10) on both sides respectively penetrate through the through holes (4). At the bottom of the support columns (10), rollers (11) are movably installed.

4. A sofa for adjusting the backrest angle according to claim 1, characterized in that, Inside both sides of the limiting sliding block (16), pulleys (17) are movably installed.

5. A sofa for adjusting the backrest angle according to claim 1, characterized in that, On one side of the motor slot (5) on the rear wall of the frame (1), a maintenance cover plate (6) is detachably installed.

6. The sofa for adjusting the backrest angle according to claim 1, wherein, The output shaft of the stepping motor (7) is in transmission connection with the lead screw (9). The lead screw (9) penetrates through the threaded hole (13), and the lead screw (9) is in threaded engagement with the threaded hole (13).

7. The sofa for adjusting the backrest angle according to claim 2, wherein On both sides of the top of the frame (1), grooves (20) are symmetrically opened. The armrests (15) are movably embedded in the grooves (20).

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