Convertible sofa bed
OwnerMichael Monir Tadrosinventor
Life of this patent
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Abstract
A sofa bed traversable between a sofa and bed configurations is disclosed herein. It has a folding mechanism having first and second pairs of link members rotatably attached to a backrest and support members on left and right sides of the back rest. Via the first and second link members, the back rest is transitionable between the sofa configuration and the bed configuration. A seat base is movable up and down at an angle via a sliding mechanism or a five bar parallelogram linkage.
Claims20
A convertible sofa bed with a rotatable backrest disposable between a sofa configuration and a bed configuration, wherein rotation of the backrest transitions a seat base between an up position and a down position, the sofa bed comprising:
- a frame comprising a left portion and a right portion;
- the backrest being disposed between the left and right portions of the frame;
- a seat base comprising a left end portion and a right end portion, the seat base being disposed between the left and right portions of the frame;
- a folding mechanism which transitions the seat base between the up position and the down position, the folding mechanism comprising:
- a right first linkage rotatably attached to the right portion of the frame and the right end portion of the seat base;
- a right second linkage rotatably attached to the right portion of the frame and the right end portion of the seat base;
- a right third linkage rotatably attached to the right portion of the frame and the right end portion of the seat base;
- and
- a right fourth linkage rotatably attached to a right end portion of the backrest and the seat base.
A method of transitioning a convertible sofa bed from a bed configuration to a sofa configuration, the method comprising the step of:
- pulling up on a backrest when the convertible sofa bed is in the bed configuration to transition the convertible sofa bed to the sofa configuration;
- transferring a force from the backrest to a seat base through a right fourth linkage attached to the back rest and the seat base;
- rotating a right first linkage, a right second linkage, and a right third linkage at a same rate of rotation throughout an entire rotational travel of the seat base as the seat base is transitioned from a down position to an up position.
Dependencies are inferred from the claim text.