Patent Application
20250040721
This application is based upon and claims priority to Chinese Patent Application No. 202310964474.7, filed on Aug. 2, 2023, the entire contents of which are incorporated herein by reference.
The present disclosure relates to the field of household furniture manufacturing, and in particular to a zero-wall trifold sofa bed.
Chinese patent application CN216675265U provides a foldable single sofa bed. When the foldable single sofa bed is completely converted into a bed, a second seat cushion is pulled out horizontally through a pulley guide rail, a handle is pulled up to support the second seat cushion through a support frame such that the second seat cushion is flush with the first seat cushion, and finally a backrest is laid flat backward through a hinge. The foldable single sofa bed requires a cumbersome multi-step operation, and cannot be placed against the wall, wasting space.
In view of the shortcomings of the prior art, an objective of the present disclosure is to provide a zero-wall trifold sofa bed that is easy to operate and improves space utilization.
In order to achieve the above objective, the zero-wall trifold sofa bed of the present disclosure adopts the following technical solution.
The zero-wall trifold sofa bed includes a sofa base, where the sofa base is provided with two symmetrical folding assemblies; the folding assemblies each include a first long arm and a second long arm that are pivoted to a front side of an inner wall of an armrest box of the sofa base; the first long arm and the second long arm are jointly pivoted to a first assembly element for assembling a first sofa base; a middle part of the first long arm is provided with a first short arm; a middle part of the second long arm is provided with a second short arm and a third short arm; the first short arm and the second short arm are jointly pivoted to a second assembly element for assembling a second sofa base; the third short arm is pivoted to one end of a connecting rod, and the other end of the connecting rod is pivoted to one end of a third assembly element for assembling a backrest; the other end of the third assembly element is pivoted to one end of a pull rod, and the other end of the pull rod is pivoted to a back side of the inner wall of the armrest box of the sofa base; a side of the third assembly element close to the connecting rod is provided with a roller; and the inner wall of the armrest box of the sofa base is provided with a horizontal sliding groove for the roller to slide.
Preferably, the front side of the inner wall of the armrest box of the sofa base is provided with a first base that is pivoted to the first long arm and the second long arm; and the back side of the inner wall of the armrest box of the sofa base is provided with a second base that is pivoted to the pull rod.
Preferably, a first tension spring is provided between a tail end of the first base and a tail end of the first long arm; and a second tension spring is provided between a front part of the pull rod and a front part of the third assembly element.
Preferably, the pull rod is provided with a recess for avoiding the backrest.
Preferably, an outer wall of a front side of the first assembly element is provided with a first limit pin; an outer wall of a back side of the first assembly element is provided with a second limit pin; the first long arm is provided with a first limit surface matched with the first limit pin and a second limit surface matched with the second limit pin; and the second long arm is provided with a third limit surface matched with the second limit pin.
Preferably, a side of the third assembly element close to the pull rod is provided with a third limit pin; and the pull rod is provided with a fourth limit surface matched with the third limit pin.
Preferably, the first sofa base includes a first frame fixedly connected to the first assembly element; a top part of the first frame is provided with a first cushion; the second sofa base includes a second frame fixedly connected to the second assembly element; a top part of the second frame is provided with a second cushion; the backrest includes a backrest frame fixedly connected to the third assembly element; and a top part of the backrest frame is provided with a backrest cushion.
Preferably, a front side of the first frame is provided with a support element.
Compared with the prior art, the present disclosure has the following advantages:
1. In the present disclosure, the first sofa base is directly flipped to drive the first long arm and the second long arm to flip forward. The first long arm drives the first short arm to flip forward, while the second long arm drives the second short arm and the third short arm to flip forward. The first short arm and the second short arm flip out of the second sofa base. Meanwhile, the third short arm pulls the third assembly element through the connecting rod. The roller slides forwards inside the horizontal sliding groove, such that the upright backrest is flattened and spliced with the first sofa base and the second sofa base to form a bed. The present disclosure features easy one-step operation. The backrest does not need to be flipped backwards to allow the sofa base to be placed against a wall, improving space utilization and room layout aesthetics.
2. When the sofa is converted into a bed, the first tension spring and the second tension spring are stretched to provide a certain resistance, allowing the first sofa base to fall smoothly and safely. When the sofa is converted into a bed, the first tension spring and the second tension spring provide tension and a certain amount of support for the first long arm and the second long arm, thereby improving the stability of the folding mechanism after unfolding. When the bed is converted into a sofa, the first tension spring and the second tension spring are contracted, providing assistance for the first sofa base and the second sofa base to fold backward. In this way, the first sofa base and the second sofa base can be folded backward easily.
The present disclosure is further described below with reference to the drawing and specific implementations. It should be understood that these implementations are only intended to illustrate the present disclosure, rather than to limit the scope of the present disclosure. Modifications made to the equivalents of the present disclosure by those skilled in the art after reading the present disclosure should fall within the scope defined by the appended claims of the present disclosure.
As shown in
A specific working process and principle of the present disclosure are as follows. When the sofa is converted into a bed, the first sofa base is folded outward. The first assembly element drives the first long arm and the second long arm to swing outward, and the first short arm and the second short arm support the second sofa base. The third short arm pulls the connecting rod, and the connecting rod pulls the third assembly element. The roller slides forwards inside the horizontal sliding groove, causing the backrest to be flattened and spliced with the first sofa base and the second sofa base to form a bed. When the bed is restored to a sofa, the first sofa base is folded inward. The first assembly element drives the first long arm and the second long arm to swing inward. The first short arm and the second short arm swing inward to drive the second sofa base back to its original position. The third short arm drives the third assembly element through the connecting rod. The roller moves backwards inside the horizontal sliding groove. The tail end of the third assembly element is tilted upwards under the action of the pull rod until it is fully reset. The present disclosure features easy operation and high stability. The sofa base can be placed against a wall to improve space utilization and room layout aesthetics.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202310964474.7 | Aug 2023 | CN | national |
