Sofa bed

Abstract

A sofa bed comprises a mattress and a guard member having a vertically opened tube-shaped configuration so as to surround an entire circumference of the mattress. The mattress comprises a head side mattress part and a leg side mattress part which can be folded into two so as to meet their upper surfaces. The guard member comprises a head side guard part and a leg side guard part which can be folded into two in the same direction as the mattress so as to meet their upper surfaces. The form of bed is provided when the mattress and the guard member are extended, and the form of sofa is provided when they are folded into two. The folded guard member forms a pair of armrest parts and a backrest part.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a sofa bed which can be used as a bed, a mattress and the like and also can be used as a sofa. [0003] 2. Description of the Background Art [0004] The sofa bed is disclosed in Japanese Unexamined Patent Publication No. 2003-339479 or Japanese Unexamined Patent Publication No. 2002-125788 as the prior art, for example. [0005] According to the sofa bed disclosed in the Japanese Unexamined Patent Publication No. 2003-339479, a flat and comfortable mattress is formed by arranging four small mats, in which when it is used as a sofa, three mats are vertically piled to form a seat and one mat is stood to form a backrest part. According to the sofa bed disclosed in this document, there is no armrest in the form of sofa. [0006] According to the mattress and chair disclosed in the Japanese Unexamined Patent Publication No. 2002-125788, it is constituted to be changed to a chair with an armrest ...

AI Technical Summary

Benefits of technology

[0012] It is another object of the present invention to provide a sofa bed which is suitable for being used by a baby especially.

[0014] According to the present invention, since the guard member surrounds the entire circumference of the mattress in the form of bed, the sofa bed is safe when it is used as a baby bed especially. In addition, since not only the mattress but also the guard member can be folded into two, and the backrest part and the armrest are formed by vertically piling the guard member, its structure is very simple.

[0015] According to one embodiment, folded parts of the mattress and the guard member are positioned at the center so as to be at the same distance from their head side ends and their leg side ends. Furthermore, the mattress and the guard member preferably have hinge parts on their upper surfaces to be folded into two so that the sofa bed can be easily changed over from the form of bed to the form of sofa.

Problems solved by technology

That is, it is necessary to be careful not to let the baby choke because a bed (or mattress) for adults is too soft.

Images