A three-fold sofa bed with zero wall support

Abstract

This invention discloses a three-fold sofa bed with zero wall-mounted support. The sofa bed includes a sofa seat with two symmetrical folding components. Each folding component includes a first long arm and a second long arm pivotally connected to the front side of the inner wall of the sofa seat armrest box. The first and second long arms are pivotally connected to a first fitting for mounting the first sofa seat. A first short arm is located in the middle of the first long arm, and a second and third short arm are located in the middle of the second long arm. The first and second short arms are pivotally connected to a second fitting for mounting the second sofa seat. The third short arm is pivotally connected to a connecting rod, and the other end of the connecting rod is pivotally connected to a third fitting for mounting the backrest. The other end of the third fitting is pivotally connected to a pull rod, and the other end of the pull rod is pivotally connected to the rear side of the inner wall of the sofa seat armrest box. A roller is located on the side of the third fitting adjacent to the connecting rod, and a horizontal sliding groove is provided on the inner wall of the sofa seat armrest box for the roller to slide along. This invention solves the problems of cumbersome operation and wasted space in existing technologies.

Description

Technical Field

[0001] This invention relates to the field of furniture manufacturing, and in particular to a three-fold sofa bed with zero wall support. Background Technology

[0002] The existing publication CN216675265U, titled "A Foldable Single Sofa Bed," requires the second cushion to be pulled out horizontally via a pulley rail to fully transform the sofa into a bed. Then, the handle is lifted upwards to raise the second cushion to a level position with the first cushion, supported by a support frame. Finally, the backrest is lowered using hinges. This process is cumbersome and cannot be completed in one step. Furthermore, this foldable single sofa bed cannot be placed against a wall, wasting considerable space. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a three-fold sofa bed that is more convenient to operate and can improve the utilization of room space.

[0004] To achieve the above objectives, the technical solution adopted by the zero-wall-adhesive three-fold sofa bed of the present invention is as follows:

[0005] A three-fold sofa bed with zero wall support includes a sofa seat with two symmetrical folding components. Each folding component includes a first long arm and a second long arm pivotally connected to the front side of the inner wall of the sofa seat armrest box. The first and second long arms are pivotally connected to a first fitting for mounting the first sofa seat. A first short arm is provided in the middle of the first long arm, and a second short arm and a third short arm are provided in the middle of the second long arm. The first and second short arms are pivotally connected to a second fitting for mounting the second sofa seat. A connecting rod is pivotally connected to the third short arm, and a third fitting for mounting the backrest is pivotally connected to the other end of the connecting rod. A pull rod is pivotally connected to the other end of the third fitting, and the other end of the pull rod is pivotally connected to the rear side of the inner wall of the sofa seat armrest box. A roller is provided on the side of the third fitting adjacent to the connecting rod, and a horizontal groove for the roller to slide is provided on the inner wall of the sofa seat armrest box.

[0006] Preferably, the front side of the inner wall of the sofa armrest box is provided with a first base for pivotally connecting the first and second long arms, and the rear side of the inner wall of the sofa armrest box is provided with a second base for pivotally connecting the pull rod.

[0007] Preferably, a first tension spring is provided between the tail of the first base and the tail of the first long arm, and a second tension spring is provided between the front of the pull rod and the front of the third assembly.

[0008] Preferably, the pull rod is provided with a recess to avoid the backrest.

[0009] Preferably, the outer side wall of the front side of the first assembly is provided with a first limiting pin, the outer side wall of the rear side of the first assembly is provided with a second limiting pin, the first long arm is provided with a first limiting surface that cooperates with the first limiting pin and a second limiting surface that cooperates with the second limiting pin, and the second long arm is provided with a third limiting surface that cooperates with the second limiting pin.

[0010] Preferably, the third assembly is provided with a third limiting pin on the side adjacent to the pull rod, and the pull rod is provided with a fourth limiting surface that cooperates with the third limiting pin.

[0011] Preferably, the first sofa seat includes a first frame fixedly connected to the first assembly, and a first cushion is provided on the top of the first frame; the second sofa seat includes a second frame fixedly connected to the second assembly, and a second cushion is provided on the top of the second frame; the backrest includes a backrest frame fixedly connected to the third assembly, and a backrest cushion is provided on the top of the backrest frame.

[0012] Preferably, a support member is provided on the front side of the first frame.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. Simply flip the first sofa seat, causing the first and second long arms to flip forward. The first long arm then flips the first short arm forward, and the second long arm flips the second and third short arms forward. The first and second short arms flip out to reveal the second sofa seat. At the same time, the third short arm pulls the third assembly through a connecting rod, and the roller slides forward in the horizontal groove, flattening the upright backrest. This allows it to be joined with the first and second sofa seats to form a bed. The operation is seamless and very convenient. The backrest does not need to be flipped backward, allowing the sofa seat to be placed against the wall, which can improve the utilization of room space and enhance the aesthetics of the room layout.

[0015] 2. During the conversion of the sofa into a bed, the first and second tension springs are stretched, providing a certain amount of resistance, which allows the first sofa seat to fall smoothly and with high safety. After the sofa is converted into a bed, the first and second tension springs provide tension, which provides a certain amount of support for the first and second long arms, thereby improving the stability of the flipping mechanism after it is unfolded. When the bed is converted into a sofa, the first and second tension springs retract, which provides assistance for the first and second sofa seats to flip backward without effort. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of the wall-mounted three-fold sofa bed of the present invention;

[0017] Figure 2 This is the front view of the unfolded component;

[0018] Figure 3 This is the back view of the unfolded component;

[0019] Figure 4 This is a front view of the folded component in its collapsed state;

[0020] Figure 5 This is the back view of the folded-up component.

[0021] Figure 6 This is a schematic diagram of the guide rail structure;

[0022] Figure 7 This is a structural diagram of the first sofa seat;

[0023] Figure 8 This is a structural diagram of the second sofa seat;

[0024] Figure 9 This is a schematic diagram of the backrest structure.

[0025] Among them, 1 is a sofa seat, 11 is a first base, 111 is a second hook, 12 is a second base, 13 is a guide rail, 131 is a horizontal slide, 2 is a folding assembly, 21 is a first long arm, 211 is a first short arm, 212 is a first limiting surface, 213 is a second limiting surface, 214 is a first hook, 22 is a second long arm, and 221 is a second long arm. U-shaped component, 2211 second short arm, 2212 third short arm, 222 third limiting surface, 23 first assembly, 231 first limiting pin, 232 second limiting pin, 24 second assembly, 25 connecting rod, 26 third assembly, 261 third limiting pin, 262 roller, 263 support leg, 27 pull rod, 271 recess, 2711 fourth limiting surface, 272 third hanging pin, 28 first tension spring, 29 second tension spring, 3 first sofa seat, 31 first frame, 32 first cushion, 33 support component, 4 second sofa seat, 41 second frame, 42 second cushion, 5 backrest, 51 backrest frame, 52 backrest cushion. Detailed Implementation

[0026] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. After reading this invention, any modifications of the invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0027] like Figure 1-9As shown, a three-fold sofa bed with zero wall support includes a sofa seat 1. Two symmetrical folding components 2 are mounted on the sofa seat. Each folding component includes a first long arm 21 and a second long arm 22 pivotally connected to the front side of the inner wall of the sofa seat armrest box. A first base 11 for pivotally connecting the first and second long arms is mounted on the front side of the inner wall of the sofa seat armrest box. The first long arm is pivotally connected to the front side of the first base, and the second long arm is pivotally connected to the middle of the first base. The front ends of the first and second long arms are pivotally connected to a first mounting component 23. The first mounting component is used to install a first sofa seat 3. The first sofa seat includes a first frame 31 fixedly connected to the first mounting component. A first cushion 32 is mounted on the top of the first frame. A support member 33, which is a support plate, is mounted on the front side of the first frame to support the unfolded sofa seat 3. The frame has a first short arm 211 fixedly connected to the middle of the first long arm, and a U-shaped piece 221 fixedly connected to the middle of the second long arm. The lower end of the U-shaped piece is the second short arm 2211, and the higher end is the third short arm 2212. The first and second short arms are pivotally connected to a second assembly 24, which is used to install a second sofa seat 4. The second sofa seat includes a second frame 41 fixedly connected to the second assembly. A second cushion 42 is installed on the top of the second frame. A first limiting pin 231 is installed on the outer wall of the front side of the first assembly, and a second limiting pin 232 is installed on the outer wall of the rear side of the first assembly. The first long arm has a first limiting surface 212 and a second limiting surface 213, and the second long arm has a third limiting surface 222. When the first limiting pin abuts against the first limiting surface, it prevents the first... The sofa seat sinks down, thereby improving the stability of the flip assembly when it is folded up. When the second limiting pin abuts against the second limiting surface, it prevents the first assembly from rotating, thereby improving the stability of the flip assembly when it is unfolded. The third short arm is pivotally connected to the connecting rod 25, and the other end of the connecting rod is pivotally connected to the third assembly 26. The third assembly is used to install the backrest 5. The backrest includes a backrest frame 51 fixedly connected to the third assembly. A backrest cushion 52 is installed on the top of the backrest frame. The other end of the third assembly is pivotally connected to the pull rod 27, and the other end of the pull rod is pivotally connected to the second base 12. The second base is installed on the rear side of the inner sidewall of the sofa seat armrest box. The pull rod has a recess 271 to avoid the backrest. The third limiting pin 261 is installed on the side of the third assembly adjacent to the pull rod. The sidewall of the recessed side forms the fourth limiting surface 271. 1. The third limiting pin abuts against the fourth limiting surface to prevent the third assembly from rotating, thereby improving the stability of the backrest after it is flattened. A roller 262 is installed on the side of the third assembly next to the connecting rod. A guide rail 13 is installed on the inner wall of the sofa seat armrest box. A horizontal sliding groove 131 for the roller to slide is opened on the guide rail. A first hook pin 214 is installed at the end of the first long arm. A second hook pin 111 is installed at the end of the first base. A first tension spring 28 is installed between the first and second hook pins. A third hook pin 272 is installed next to the recessed part of the pull rod. The third assembly is bent into a support leg 263. A second tension spring 29 is installed between the support leg and the third hook pin. During the process of converting the sofa into a bed, the first and second tension springs are stretched to provide a certain resistance, so that the first sofa seat can fall smoothly and with high safety.When the sofa is converted into a bed, the first and second tension springs provide tension, offering support to the first and second long arms, thus improving the stability of the flipping mechanism after it is unfolded. When the bed is converted into a sofa, the first and second tension springs retract, providing assistance for the first and second sofa seats to flip backward effortlessly.

[0028] The specific working process and principle of this invention are as follows: When the sofa is converted into a bed, the first sofa seat is flipped outwards. The first assembly drives the first and second long arms to swing outwards, and the first and second short arms lift the second sofa seat. The third short arm pulls the connecting rod, which in turn pulls the third assembly. The rollers slide forward in the horizontal groove, and the backrest is flattened, connecting with the first and second sofa seats to form a bed. When the bed is converted back into a sofa, the first sofa seat is flipped inwards. The first assembly drives the first and second long arms to swing inwards, and the first and second short arms swing inwards to reset the second sofa seat. The third short arm pushes the third assembly through the connecting rod, and the rollers move backwards in the horizontal groove. The tail end of the third assembly tilts upwards under the action of the pull rod until it is fully reset. This invention is easy to operate, highly stable, and allows the sofa seat to be placed against a wall, improving both the utilization of room space and the aesthetics of the room layout.

Claims

1. A three-fold sofa bed with zero wall-mounted backrest, characterized in that: The sofa includes a sofa seat with two symmetrical folding assemblies. Each folding assembly includes a first long arm and a second long arm pivotally connected to the front side of the inner wall of the sofa seat armrest box. The first and second long arms are pivotally connected to a first mounting component for installing the first sofa seat. A first short arm is located in the middle of the first long arm, and a second and third short arm are located in the middle of the second long arm. The first and second short arms are pivotally connected to a second mounting component for installing the second sofa seat. A connecting rod is pivotally connected to the third short arm, and the other end of the connecting rod is pivotally connected to a useful... The third assembly for installing the backrest has a pull rod pivotally connected to its other end. The other end of the pull rod is pivotally connected to the rear side of the inner wall of the sofa armrest box. A roller is provided on the side of the third assembly adjacent to the connecting rod. A horizontal sliding groove for the roller to slide is provided on the inner wall of the sofa armrest box. A first base for pivotally connecting the first and second long arms is provided on the front side of the inner wall of the sofa armrest box. A second base for pivotally connecting the pull rod is provided on the rear side of the inner wall of the sofa armrest box. The pull rod is provided with a recess to avoid the backrest.

2. The three-fold sofa bed with zero wall support according to claim 1, characterized in that: A first tension spring is provided between the tail of the first base and the tail of the first long arm, and a second tension spring is provided between the front of the pull rod and the front of the third assembly.

3. The three-fold sofa bed with zero wall support according to claim 1, characterized in that: The first assembly has a first limiting pin on the outer side wall of the front side, a second limiting pin on the outer side wall of the rear side, a first long arm with a first limiting surface that cooperates with the first limiting pin and a second limiting surface that cooperates with the second limiting pin, and a second long arm with a third limiting surface that cooperates with the second limiting pin.

4. The three-fold sofa bed with zero wall support according to claim 1, characterized in that: The third assembly is provided with a third limiting pin on the side adjacent to the pull rod, and the pull rod is provided with a fourth limiting surface that cooperates with the third limiting pin.

5. The three-fold sofa bed with zero wall support according to claim 1, characterized in that: The first sofa seat includes a first frame fixedly connected to the first assembly, and a first cushion is provided on the top of the first frame. The second sofa seat includes a second frame fixedly connected to the second assembly, and a second cushion is provided on the top of the second frame. The backrest includes a backrest frame fixedly connected to the third assembly, and a backrest cushion is provided on the top of the backrest frame.

6. The three-fold sofa bed with zero wall support according to claim 5, characterized in that: A support member is provided on the front side of the first frame.

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