Sofa backrest structure and sofa

Abstract

A sofa backrest structure and a sofa belong to the technical field of sofas. The backrest comprises a backrest frame and a backrest main body, a first connecting rod and a second connecting rod are rotationally connected between two opposite side ends of the backrest main body and the backrest frame, and a rotational connecting point of the first connecting rod and the backrest frame is positioned above a rotational connecting point of the second connecting rod and the backrest frame; the rotary connecting point of the first connecting rod and the backrest main body in the vertical state is located above the rotary connecting point of the second connecting rod and the backrest main body in the vertical state, so that when the backrest main body is overturned to the horizontal state, the second connecting rod rotates upwards around the rotary connecting point of the second connecting rod and the backrest frame, and the height of the lower end of the backrest main body is increased. According to the utility model, the whole sofa backrest can be overturned, and the utilization rate of the sofa backrest in the overturning state is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sofa technical field especially relates to a sofa back structure and chair of higher utilization rate to sofa backrest turnover state. BACKGROUND

[0002] At present, in order to improve the convenience of user when using sofa, some sofas can turn over backrest to horizontal state to use as small table board. For example, the Chinese invention patent application No. 201710195707.6 discloses a multifunctional sofa, which is provided with a turnable sofa backrest capable of turning over on the sofa fixed base, and a tea tray capable of being used as a temporary tea table is arranged on the sofa backrest.

[0003] However, the above-mentioned sofa still has the problem of low utilization rate for the turnover state of sofa backrest. INVENTION CONTENTS

[0004] The utility model aims at solving the problems of prior art, and provides a sofa backrest structure and sofa, which can realize the turnover of the whole sofa backrest and improve the utilization rate for the turnover state of sofa backrest.

[0005] The utility model aims at solving the problems of prior art, and provides a sofa backrest structure and sofa, which can realize the turnover of the whole sofa backrest and improve the utilization rate for the turnover state of sofa backrest.

[0006] A sofa backrest structure includes a backrest frame and a backrest body, first connecting rods and second connecting rods are rotationally connected between the opposite sides of the backrest body and the backrest frame, the rotation connection point of the first connecting rod and the backrest frame is above the rotation connection point of the second connecting rod and the backrest frame, and the rotation connection point of the first connecting rod and the backrest body in the vertical state is above the rotation connection point of the second connecting rod and the backrest body in the vertical state, so that when the backrest body is turned over to the horizontal state, the second connecting rod rotates upward around the rotation connection point of the second connecting rod and the backrest frame, and the height of the lower end of the backrest body is raised.

[0007] Preferably, the backrest frame is provided with a third connecting rod, and the first connecting rod and the second connecting rod are rotationally connected with the third connecting rod.

[0008] Preferably, the side end of the backrest body is provided with a reinforcing mounting piece, and the first connecting rod and the second connecting rod are rotationally connected with the reinforcing mounting piece.

[0009] Preferably, the back of the backrest body is provided with a storage groove, and a turnover cover plate is arranged on the storage groove.

[0010] Preferably, the turnover cover plate is rotationally connected to the lower end of the back of the backrest body in the vertical state.

[0011] Preferably, the back of the backrest body is provided with a cup holder.

[0012] Preferably, the backrest body is equipped with a wireless charging device on its back.

[0013] Preferably, a reading light is provided at the upper end of the backrest frame.

[0014] Preferably, a light panel is rotatably connected to the upper end of the backrest frame, and the reading light is disposed on the light panel.

[0015] This specification also provides a sofa, including at least two sofa seat units, at least one of which has a sofa back structure as described above.

[0016] The advantages of this utility model are:

[0017] 1. By replacing the conventional pivot structure with a linkage structure, the lower part of the backrest body is raised during the process of flipping to a horizontal state. This avoids interference between the backrest body and the sofa seat, and also meets the height requirements. This allows the entire backrest body to be flipped, improving utilization.

[0018] 2. The installation strength of the linkage structure is improved by the third link and the reinforcing mounting parts, thereby ensuring the support strength when the backrest body is in a horizontal state;

[0019] 3. Because the entire backrest body can be flipped, the entire back space of the backrest body can be utilized to integrate more functions. In addition to the regular cup holder, a storage slot and a wireless charging device can also be set up to improve the convenience of use for users.

[0020] 4. By rotating the light panel to connect it to the backrest frame, interference with the upright backrest body can be avoided. Attached Figure Description

[0021] Figure 1 This is a structural diagram of a sofa backrest structure provided in an embodiment of this specification;

[0022] Figure 2 This specification provides a diagram showing the linkage state of a sofa backrest structure in a horizontal state, as provided in an embodiment of the specification.

[0023] Figure 3 This is a diagram showing the linkage state of a sofa backrest structure in a stowed state, as provided in an embodiment of this specification.

[0024] Figure 4 A front view of a sofa provided as an embodiment of this specification;

[0025] In the diagram: 1-Backrest frame; 2-Backrest body; 21-Cup holder; 22-Wireless charging device; 23-Storage slot; 231-Flip-over cover; 31-First link; 32-Second link; 33-Third link; 34-Reinforcing mounting piece; 51-Light panel; 52-Reading light; 61-Sofa seat unit; 62-Backrest. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0027] As mentioned in the background art, existing sofas cannot have their entire backrest flipped up due to the height requirements of the backrest and the interference between the backrest and the seat after flipping. Instead, only the upper part of the backrest can be flipped up, thus affecting the utilization rate of the flipped backrest.

[0028] Therefore, such as Figures 1-2 As shown, this embodiment provides a sofa backrest structure, including a backrest frame 1 and a backrest body 2. A first connecting rod 31 and a second connecting rod 32 are rotatably connected to the backrest frame 1 on both opposite sides of the backrest body 2. The rotatable connection point between the first connecting rod 31 and the backrest frame 1 is above the rotatable connection point between the second connecting rod 32 and the backrest frame 1. Similarly, the rotatable connection point between the first connecting rod 31 and the upright backrest body 2 is above the rotatable connection point between the second connecting rod 32 and the upright backrest body 2. Thus, when the backrest body 2 is in the upright position, the state of the two connecting rods is as follows: Figure 3 As shown, it should be noted that the upright state refers to the backrest body being housed within the backrest frame. The state in use, for comparison with the horizontal state after being flipped over, does not mean the backrest body is in a perfectly vertical 90° position; the backrest body often has a certain degree of tilt. During the process of flipping the backrest body 2 to the horizontal state, due to the limiting effect of the first connecting rod 31, the second connecting rod 32 rotates upwards around its rotational connection point with the backrest frame 1. Therefore, when the backrest body 2 is in the horizontal state, the height of its lower end increases with the rotation of the second connecting rod 32, as shown in the diagram. Figure 2 As shown. Therefore, after the backrest body 2 is flipped to a horizontal position, its upholstery faces downwards. However, due to the increased height, the upholstery will not be severely compressed against the upholstery on the sofa seat, thus ensuring high stability in the horizontal position. Simultaneously, the increased height better meets the user's needs. Therefore, in this embodiment, the entire backrest body 2 or most of its structure can be flipped, increasing the usable area on the upper side of the backrest body 2 in the horizontal position to integrate more functions. This improves the utilization rate of the flipped backrest body 2 and enhances the user's convenience in using the sofa.

[0029] To improve structural strength and stability, a third connecting rod 33 is provided on the backrest frame 1. One end of the first connecting rod 31 and the second connecting rod 32 are rotatably connected to the third connecting rod 33. Simultaneously, a reinforcing mounting piece 34 is provided on the side end of the backrest body 2. The other ends of the first connecting rod 31 and the second connecting rod 32 are rotatably connected to the reinforcing mounting piece 34. The reinforcing mounting piece 34 can be a right-angle piece, with its two plates connecting the backrest body 2 and the connecting rods respectively. Furthermore, through the aforementioned third connecting rod 33 and reinforcing mounting piece 34, the entire connecting rod structure can be pre-assembled. Then, bolts are used to connect and fix the third connecting rod 33 and the reinforcing mounting piece 34 to the backrest frame 1 and the backrest body 2 respectively, thus achieving the installation of the entire connecting rod structure.

[0030] Due to the design of the aforementioned linkage structure, the entire backrest body or most of its structure can be flipped to a horizontal position to be used as a "small table." Therefore, the "small table" has a larger usable area, allowing for the integration of more functions. Specifically, taking the backrest body 2 in its horizontal position as an example, with the back of the backrest body 2 facing upwards, two cup holders 21 are located near the front of the back of the backrest body 2. A wireless charging device 22 is located in the area slightly behind the two cup holders 21, and a storage slot 23 is located behind the wireless charging device 22. To allow the storage slot 23 to be closed and to facilitate its use as a table, a flip-up cover 231 is rotatably connected to the backrest body 2 near the rear end of the storage slot 23. When the flip-up cover 231 is open, the user can lean against the backrest frame 1, while also avoiding interference with users on the left and right sides or with water cups or other items on the front.

[0031] In addition, to facilitate reading on the sofa, a light panel 51 is rotatably connected to the upper part of the backrest frame 1. The light panel 51 is equipped with two reading lights 52 on the left and right. In use, the light panel 51 is flipped upward to a horizontal position, and the reading lights 52 are positioned below for illumination. In storage, the light panel 51 is flipped downward to fit against the backrest frame 1. At this time, the reading lights 52 face the backrest frame 1, so that they will not interfere with the reset action of the backrest body 2, and the backrest body 2 will not collide with the reading lights 52 when it resets.

[0032] like Figure 4 As shown, this specification provides a sofa that may include three sofa seat units 61. Two of the side sofa seat units 61 have conventional backrests 62, while the middle sofa seat unit 61 has the sofa backrest structure described above, which serves as a "small table" between the left and right sofa seat units after the backrest body 2 is flipped to a horizontal position. Of course, the sofa may also include more sofa seat units and have the sofa backrest structure described above at the desired locations.

[0033] The above are merely preferred embodiments of this utility model, and are implementations based on the overall concept of this utility model. Furthermore, the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A sofa backrest structure, comprising a backrest frame and a backrest body, characterized in that, The backrest body has a first connecting rod and a second connecting rod rotatably connected to both opposite ends of the backrest body and the backrest frame. The rotatable connection point between the first connecting rod and the backrest frame is above the rotatable connection point between the second connecting rod and the backrest frame. The rotatable connection point between the first connecting rod and the upright backrest body is above the rotatable connection point between the second connecting rod and the upright backrest body. This allows the second connecting rod to rotate upwards around its rotatable connection point with the backrest frame when the backrest body is flipped to a horizontal position, thereby raising the height of the lower end of the backrest body.

2. The sofa backrest structure according to claim 1, characterized in that, The backrest frame is provided with a third link, and the first link and the second link are rotatably connected to the third link.

3. The sofa backrest structure according to claim 1, characterized in that, The backrest body is provided with a reinforcing mounting piece on its side, and both the first connecting rod and the second connecting rod are rotatably connected to the reinforcing mounting piece.

4. A sofa backrest structure according to claim 1, characterized in that, The backrest body has a storage compartment on its back, and the storage compartment has a flip-up cover.

5. A sofa backrest structure according to claim 4, characterized in that, The flip-up cover is rotatably connected to the lower back of the main backrest when it is in an upright position.

6. A sofa backrest structure according to claim 1, characterized in that, The backrest body has a cup holder on its back.

7. A sofa backrest structure according to claim 1, characterized in that, The backrest body is equipped with a wireless charging device on its back.

8. A sofa backrest structure according to claim 1, characterized in that, A reading light is provided at the upper part of the backrest frame.

9. A sofa backrest structure according to claim 8, characterized in that, A light panel is rotatably connected to the upper part of the backrest frame, and the reading light is mounted on the light panel.

10. A sofa, characterized in that, It includes at least two sofa seat units, and at least one sofa seat unit has a sofa back structure as described in any one of claims 1-9.

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