A sofa with adjustable backrest angle

Abstract

The utility model relates to a sofa technical field, concretely relates to a sofa convenient to adjust backrest angle, including sofa main part and sofa backrest, sofa main part and sofa backrest rotation connection, the left and right side wall of sofa main part is set with the sliding slot, is equipped with the crosspiece in the sliding slot, the crosspiece outside slides and sets up the slide, the slide outside rotation is connected with the support rod, the one end of support rod away from the slide is connected with sofa backrest rotation, the one end of slide away from support rod is equipped with two limit rods, two limit rods are connected with same limit board, and the same movable plate is connected with sliding between two limit rods, the outside of two limit rods all sets up the support spring, and the up and down both ends of movable plate all are equipped with the limiting mechanism, when adjusting sofa backrest angle, pull movable plate, make movable plate move away from sofa main part along limit rod, movable plate drives the limiting mechanism to move, make the limiting mechanism separate with sofa main part, no longer limit the slide, and promote sofa backrest to adjust its angle.

Description

Technical Field

[0001] This utility model relates to the field of sofa technology, specifically to a sofa with an adjustable backrest angle. Background Technology

[0002] In daily life, sofas have become an essential piece of furniture in many households, greatly improving people's quality of life. Sofas are generally made of soft materials, which increases people's comfort. Most sofas nowadays are equipped with backrest adjustment devices, which allow the backrest to be adjusted to suit people's different sitting postures.

[0003] However, most existing sofa backrest adjustment devices use hydraulic cylinders for adjustment, which require electricity to adjust the backrest, resulting in energy waste. Furthermore, the backrest cannot be adjusted in the event of a power outage or power failure, thus affecting usability. Utility Model Content

[0004] The purpose of this utility model is to provide a sofa with an adjustable backrest angle, solving the problem that existing sofa backrest adjustment devices mostly use hydraulic cylinders for adjustment, which require electricity to adjust the backrest, resulting in a certain amount of energy waste. At the same time, the backrest cannot be adjusted in the event of a power outage or no power, thus affecting the use of the sofa.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A sofa with an adjustable backrest angle includes a sofa body and a sofa backrest, which are rotatably connected. Horizontally arranged grooves are formed on both the left and right side walls of the sofa body. A crossbar is provided within each groove, and a slide bar is slidably fitted onto the outer side of the crossbar, sliding within the groove. A support rod is rotatably connected to the outer end of the slide bar near the sofa backrest. The end of the support rod away from the slide bar is rotatably connected to the corresponding side of the sofa backrest. Two horizontally symmetrical limiting rods are provided at the end of the slide bar away from the support rod. The ends of the two limiting rods away from the slide bar are positioned away from the sofa body and connected to the same limiting plate. A movable plate is slidably connected between the two limiting rods. A support spring is fitted onto the outer side of each of the two limiting rods. The two ends of the support spring are connected to the movable plate and the limiting plate, respectively. Limiting mechanisms are provided at both the upper and lower ends of the movable plate.

[0007] A further technical solution is that the limiting mechanism includes two locking bars. The left and right side walls of the sofa body are provided with oblique tooth grooves arranged in a straight line array on the upper and lower sides of the slide groove. The oblique tooth groove includes an angled groove wall and a right-angled groove wall. The angled groove wall and the right-angled groove wall of the same oblique tooth groove are arranged sequentially from the front side to the back side of the sofa body. The two locking bars are located at the upper and lower ends of the movable plate. The side of the locking bar closest to the sofa body is provided with a protruding tooth that matches the oblique tooth groove.

[0008] A further technical solution is to have a pull rod on the side of the movable board away from the main body of the sofa. The end of the pull rod away from the main body of the sofa slides through the limiting plate and is connected to a handle.

[0009] A further technical solution is to provide a return spring on the outer side of the limiting rod, with the two ends of the return spring connected to the groove wall and the slide bar near the rear side of the sofa body, respectively.

[0010] A further technical solution is to have armrests on both sides of the sofa backrest.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] When adjusting the sofa backrest angle, pull the movable plate, causing it to move away from the sofa body along the limiting rod. This compresses the support spring, and the movable plate moves the limiting mechanism, separating it from the sofa body. This removes the limiting mechanism from the slide bar, allowing you to push the sofa backrest to adjust its angle. With the combined action of the support rod, sofa backrest, and slide bar, the slide bar slides along the crossbar, allowing the support rod to rotate and adjust the sofa backrest angle. When the sofa backrest is adjusted to the desired angle, release the movable plate. The support spring then moves the limiting mechanism towards the sofa body, limiting the slide bar and preventing the support rod from rotating. This achieves the goal of limiting the sofa backrest angle. This structure eliminates the need for electricity when adjusting the sofa backrest, improving its versatility. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a sofa structure that facilitates the adjustment of the backrest angle according to the present invention.

[0014] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0015] Figure 3 This utility model Figure 2 A magnified schematic diagram of another state structure at point B.

[0016] Figure 4 This utility model Figure 2A top-down view of the cross-sectional structure of the slide at point B.

[0017] Figure 5 This utility model Figure 2 A top-down view of the sectional structure of the oblique tooth groove at point B.

[0018] Icons: 1-Sofa body, 2-Sofa backrest, 3-Slide groove, 4-Crossbar, 5-Slide bar, 6-Support rod, 7-Limit rod, 8-Limit plate, 9-Moving plate, 10-Support spring, 11-Locking bar, 12-Angled groove, 13-Angled groove wall, 14-Right-angle groove wall, 15-Protruding tooth, 16-Pull rod, 17-Handle, 18-Reset spring, 19-Armrest, 20-Right-angle edge, 21-Angled edge. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in 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 present utility model and are not intended to limit the present utility model.

[0020] Example 1

[0021] See Figures 1 to 4 The present invention discloses a sofa with an adjustable backrest angle, comprising a sofa body 1 and a sofa backrest 2, which are rotatably connected. Horizontally arranged grooves 3 are provided on both the left and right side walls of the sofa body 1. A crossbar 4 is provided within the groove 3. A slide strip 5, slidably mounted within the groove 3, is mounted on the outer side of the crossbar 4. A support rod 6 is rotatably connected to the outer end of the slide strip 5 near the sofa backrest 2. The end of the support rod 6 away from the slide strip 5 is rotatably connected to the corresponding side of the sofa backrest 2. Two horizontally symmetrical limiting rods 7 are provided on the outer end of the slide strip 5 away from the support rod 6. The ends of the two limiting rods 7 away from the slide strip 5 are located away from the sofa body 1 and connected to the same limiting plate 8. A movable plate 9 is slidably connected between the two limiting rods 7. A support spring 10 is mounted on the outer side of each of the two limiting rods 7. The two ends of the support spring 10 are respectively connected to the movable plate 9 and the limiting plate 8. Limiting mechanisms are provided at both the upper and lower ends of the movable plate 9.

[0022] Specifically, when the angle of the sofa backrest 2 needs to be adjusted, the movable plate 9 is pulled, causing it to move away from the sofa body 1 along the limiting rod 7. This compresses the support spring 10, and the movable plate 9 moves the limiting mechanism, separating it from the sofa body 1. This removes the limiting mechanism from the slide bar 5, allowing the sofa backrest 2 to be pushed to adjust its angle. With the combined action of the support rod 6, the sofa backrest 2, and the slide bar 5, the slide bar 5 slides along the crossbar 4, allowing the support rod 6 to rotate and adjust the angle of the sofa backrest 2. When the sofa backrest 2 is adjusted to the appropriate angle, the movable plate 9 is released. Under the action of the support spring 10, the limiting mechanism moves towards the sofa body 1, limiting the slide bar 5. This prevents the support rod 6 from rotating, thus limiting the angle of the sofa backrest 2. This structure eliminates the need for electricity when adjusting the sofa backrest 2, improving its applicability.

[0023] Example 2

[0024] Based on the aforementioned Example 1, see [link / reference] Figures 1 to 5 As shown, the limiting mechanism includes two locking bars 11. The left and right side walls of the sofa body 1 are provided with inclined tooth grooves 12 arranged in a straight line on the upper and lower sides of the slide groove 3. The inclined tooth groove 12 includes an inclined groove wall 13 and a right-angle groove wall 14. The inclined groove wall 13 and the right-angle groove wall 14 of the same inclined tooth groove 12 are arranged sequentially from the front side to the rear side of the sofa body 1. The two locking bars 11 are located at the upper and lower ends of the movable plate 9. The side of the locking bar 11 closest to the sofa body 1 is provided with protruding teeth 15 that are adapted to the inclined tooth groove 12 in a straight line. The protruding teeth 15 include a right-angled side 20 and an inclined side 21. The right-angled side 20 and the inclined side 21 of the same protruding tooth 15 are arranged sequentially from the front side to the rear side of the sofa body 1.

[0025] Specifically, when it is necessary to adjust the angle of the sofa backrest 2, the movable plate 9 is pulled, which moves the locking strip 11, causing the protruding tooth 15 to slide out of the inclined groove. This allows the slide bar 5 to move along the slide rod, achieving the purpose of rotating the support rod 6 and adjusting the backrest angle. When the sofa backrest 2 is adjusted to the appropriate angle, the movable plate 9 is released. Under the action of the support spring 10, the movable plate 9 moves towards the sofa body 1. The movable plate 9 moves the locking strip 11 towards the inclined groove, causing the protruding tooth 15 to be placed in the inclined groove, limiting the slide bar 5, so that the support rod 6 no longer rotates and is limited, thereby limiting the angle of the sofa backrest 2.

[0026] Simultaneously, by setting an oblique groove and a protruding tooth 15 that matches the oblique groove, during use, when the user leans against the sofa backrest 2, the support rod 6 exerts a force on the slider 5 towards the rear of the sofa body 1. At this time, the protruding tooth 15 is placed in a part of the oblique groove, and the right-angled groove wall 14 of the oblique groove abuts against the right-angled side 20 of the protruding tooth 15. At the same time, under the action of the support spring 10, the slider 5 can be limited, preventing the slider 5 from moving along the crossbar 4, so that the support rod 6 no longer rotates and is limited, thereby limiting the angle of the sofa backrest 2, ensuring that the angle of the sofa backrest 2 does not change when the user leans against the sofa backrest 2. When it is necessary to reduce the angle between the sofa body 1 and the sofa backrest 2, the angle of the sofa backrest 2 can be limited. When the angle between the backrest 2 and the sofa backrest 2 is adjusted, the sofa backrest 2 is pushed forcefully. At this time, the angled groove wall 13 of the inclined groove contacts the angled edge 21 of the protruding tooth 15. The angled groove wall 13 acts as a guide for the angled edge 21, causing the protruding tooth 15 to slide out of the inclined tooth groove 12 along the angled groove wall 13. During this process, the support spring 10 is compressed. Therefore, when the protruding tooth 15 slides out of the corresponding inclined tooth groove 12 along the angled groove wall 13, when the protruding tooth 15 aligns with the next inclined tooth groove 12, it will slide into the next inclined tooth groove 12 under the action of the support spring 10, thus limiting the sofa backrest 2. Therefore, when using the device, there is no need to manually unlock the limiting mechanism, and the angle between the sofa body 1 and the sofa backrest 2 can be directly adjusted, which improves portability.

[0027] As a preferred implementation method, see [link / reference] Figures 3 to 5 As shown, a pull rod 16 is provided on the side of the movable plate 9 away from the sofa body 1. The end of the pull rod 16 away from the sofa body 1 slides through the limiting plate 8 and is connected to the handle 17. By setting the pull rod 16 and the handle 17, it is easy to pull the movable plate 9.

[0028] Example 3

[0029] Based on the aforementioned Example 1, see [link / reference] Figure 2 As shown, a return spring 18 is sleeved on the outer side of the limiting rod 7. The two ends of the return spring 18 are connected to the groove wall of the slide 3 near the rear side of the sofa body 1 and the slide bar 5, respectively. By setting the return spring 18, when the angle between the sofa body 1 and the sofa back 2 is increased, the limiting mechanism is unlocked. At this time, when the sofa back 2 is pushed backward, the return spring 18 can play a resistance role on the slide bar 5, thereby preventing the sofa back 2 from rotating backward to the maximum angle. It should be noted that the elastic potential energy of the return spring 18 will not affect the normal use of the limiting mechanism.

[0030] Example 4

[0031] Based on the aforementioned Example 1, see [link / reference] Figure 1 As shown, armrests 19 are provided on the left and right sides of the sofa backrest 2.

[0032] Although the present invention has been described herein with reference to several illustrative embodiments, it should be understood that many other modifications and implementations can be devised by those skilled in the art, which will fall within the scope and spirit of the principles disclosed herein. More specifically, various variations and modifications can be made to the components and / or layout of the subject matter combination within the scope of the disclosure, drawings, and claims. Besides variations and modifications to the components and / or layout, other uses will be apparent to those skilled in the art.

Claims

1. A sofa with an adjustable backrest angle, comprising a sofa body (1) and a sofa backrest (2), wherein the sofa body (1) and the sofa backrest (2) are rotatably connected, characterized in that: The sofa body (1) has horizontally arranged grooves (3) on both the left and right side walls. A crossbar (4) is provided in the groove (3). A slide strip (5) is slidably fitted on the outside of the crossbar (4) and is located in the groove (3). A support rod (6) is rotatably connected to the end of the slide strip (5) near the sofa back (2). The end of the support rod (6) away from the slide strip (5) is rotatably connected to the side of the sofa back (2) corresponding to the slide strip (5). Two limiting rods (7) are horizontally symmetrically arranged at one end. The ends of the two limiting rods (7) away from the slide bar (5) are set away from the sofa body (1) and connected to the same limiting plate (8). The same movable plate (9) is slidably connected between the two limiting rods (7). Support springs (10) are sleeved on the outer side of the two limiting rods (7). The two ends of the support springs (10) are respectively connected to the movable plate (9) and the limiting plate (8). The upper and lower ends of the movable plate (9) are provided with limiting mechanisms.

2. A sofa with an adjustable backrest angle according to claim 1, characterized in that: The limiting mechanism includes two locking bars (11). The left and right side walls of the sofa body (1) are provided with oblique tooth grooves (12) arranged in a straight line array on the upper and lower sides of the slide groove (3). The oblique tooth groove (12) includes an oblique groove wall (13) and a right-angle groove wall (14). The oblique groove wall (13) and the right-angle groove wall (14) of the same oblique tooth groove (12) are arranged sequentially from the front side to the rear side of the sofa body (1). The two locking bars (11) are located at the upper and lower ends of the movable plate (9). The locking bar (11) has a protruding tooth (15) that matches the oblique tooth groove (12) on the side close to the sofa body (1).

3. A sofa with an adjustable backrest angle according to claim 2, characterized in that: The movable plate (9) is provided with a pull rod (16) on the side away from the sofa body (1). The end of the pull rod (16) away from the sofa body (1) slides through the limiting plate (8) and is connected to the handle (17).

4. A sofa with an adjustable backrest angle according to claim 1, characterized in that: A return spring (18) is sleeved on the outer side of the limiting rod (7). The two ends of the return spring (18) are respectively connected to the groove wall and the slide bar (5) of the slide groove (3) near the rear side of the sofa body (1).

5. A sofa with an adjustable backrest angle according to claim 1, characterized in that: The sofa back (2) is provided with armrests (19) on the left and right sides.

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