Flexible and Portable Sofa Bed

Abstract

A flexible and portable sofa bed comprises a cushion assembly and a support frame; the cushion assembly is provided with a front cushion, a center cushion and a back cushion along the longitudinal direction, one ends of the front cushion and the center cushion are foldable connected, and the back cushion can be independently turned relative to the center cushion; the center cushion is connected with the support frame in a sliding way, and the back cushion is connected with the support frame in a rotating way. The movable connection of the cushion assembly and the support frame enables the sofa bed to change its working state.

What is claimed is: 
     
         1 . A flexible and portable sofa bed, comprising a cushion assembly and a support frame; and
 wherein, said cushion assembly is provided with a front cushion, a center cushion and a back cushion along a longitudinal direction, wherein one ends of said front cushion and said center cushion are foldable connected, and said back cushion can be independently turned relative to said center cushion; and   wherein, said center cushion is connected with said support frame in a sliding way, said back cushion is connected with said support frame in a rotating way, and movable connection of said cushion assembly and said support frame enables said sofa bed to change a working state; and   when said front cushion is folded on said center cushion and said back cushion leans against said support frame, said sofa bed is in a sofa state; and   when said front cushion is turned to a plane continuous with said center cushion, and said back cushion leans against said support frame, said sofa bed is in a recliner state; and   when said center cushion is pulled out from said support frame, said front cushion and said back cushion are turned over to make said front cushion, said center cushion and said back cushion become a continuous plane, said sofa bed is in a bed state.   
     
     
         2 . The sofa bed according to  claim 1 , wherein said support frame comprises a back plate and a side plate; and said back plate and said side plate are arranged around said cushion assembly and said side plate defines a turning and sliding track of said cushion assembly. 
     
     
         3 . The sofa bed according to  claim 2 , wherein said support frame comprises two cross bars, and said two cross bars are arranged in parallel, and a number of said side plate is two, and said two cross bars are fixed between two said side plate through threaded connection. 
     
     
         4 . The sofa bed according to  claim 3 , wherein said side plates are all provided with support rods which are fixed on said side plates through threads and said support rods are configured to support said cushion assembly, and a number of said support rods is two. 
     
     
         5 . The sofa bed according to  claim 4 , wherein a reinforcing rod is connected between said two cross bars and said reinforcing rod is located below said cross bars; and said reinforcing rod is in an incompletely closed trapezoidal structure, and said cross bars, said support rods and said reinforcing rod jointly define a storage space, and said storage space is configured to store articles. 
     
     
         6 . The sofa bed according to  claim 5 , wherein said center cushion is fixed with a fastener through threaded connection, and said fastener is arranged far away from said front cushion; and said fastener has an opening, a size of which is consistent with a thickness of said support rods, so that said center cushion can be detachably fastened on said support rods through said fastener. 
     
     
         7 . The sofa bed according to  claim 6 , wherein said center cushion has support feet, and said support frame has bed feet; and both of said support feet and said bed feet are in contact with ground to jointly support said sofa bed. 
     
     
         8 . The sofa bed according to  claim 7 , wherein said front cushion is hinged with said center cushion, and when said sofa bed is in said sofa state, said front cushion is folded on said center cushion, and said front cushion is completely overlapped with said center cushion. 
     
     
         9 . The sofa bed according to  claim 8 , wherein said front cushion can be turned over relative to said center cushion, said front cushion has a turning angle of not less than 180 degrees, and when said sofa bed is in a recliner state, said front cushion is turned over to be in a same parallel plane with said center cushion. 
     
     
         10 . The sofa bed according to  claim 9 , wherein said front cushion has foldable feet with a folding angle of not less than 90 degrees, and a fastener is arranged below said center cushion; and when said sofa bed is in said sofa state, said foldable feet are accommodated in said front cushion, and said fastener is fastened and fixed on said cross bar. 
     
     
         11 . The sofa bed according to  claim 10 , wherein said back cushion is fixed between two said side plates through threaded connection and said back cushion is hinged with two said side plates; and when said sofa bed is in said sofa state or said recliner state, said back cushion is attached to said back plate in an inclined state. 
     
     
         12 . The sofa bed according to  claim 11 , wherein one end of said center cushion is provided with a support, and said support is fastened on said center cushion through threads; and when said sofa bed is in said bed state, said back cushion is attached to said support, and said front cushion, said center cushion and said back cushion in a same parallel plane. 
     
     
         13 . A flexible and portable sofa bed, comprising a cushion assembly and a support frame; and
 wherein, said cushion assembly is provided with a front cushion, a center cushion and a back cushion along a longitudinal direction, wherein one ends of said front cushion and said center cushion are foldable connected, and said back cushion can be independently turned relative to said center cushion; and   wherein, said support frame is provided with a storage space, and said cushion assembly covers said storage space, wherein said center cushion is connected with said support frame in a sliding way, and said back cushion is connected with said support frame in a rotating way; and movable connection of said cushion assembly and said support frame enables said sofa bed to change a working state; and   when said front cushion is folded on said center cushion and said back cushion leans against said support frame, said storage space supports said center cushion, and said sofa bed is in a sofa state; and   when said front cushion is turned to a plane continuous with said center cushion, and said back cushion leans against said support frame, said storage space supports said center cushion, and said sofa bed is in a recliner state; and   when said center cushion is pulled out from said support frame, said front cushion and said back cushion are turned over to make said front cushion, said center cushion and said back cushion become a continuous plane, said storage space supports said back cushion, and said sofa bed is in a bed state.   
     
     
         14 . The sofa bed according to  claim 13 , wherein a left side and a right side of said support frame are provided with side plates, which extend upward and are higher than said cushion assembly and are configured to serve as handrails or guardrails of said sofa bed. 
     
     
         15 . The sofa bed according to  claim 14 , wherein a front of said center cushion is detachably connected with a baffle plate through threads, and support feet are arranged behind said baffle plate, and said support feet and said baffle plate are designed to be tightly attached to each other. 
     
     
         16 . The sofa bed according to  claim 15 , wherein said sofa bed is made of an iron frame in a square structure, and a cloth bag is sewn on said side plates and said cloth bag is configured to store articles; and four corners of bottom of said sofa bed are provided with pulleys which are detachably connected with said sofa bed. 
     
     
         17 . A method for realizing daily life, work and entertainment by using a sofa bed, comprising providing a flexible and light sofa bed, wherein said sofa bed comprises a cushion assembly and a support frame; and
 wherein, said cushion assembly is provided with a front cushion, a center cushion and a back cushion along a longitudinal direction, wherein one ends of said front cushion and said center cushion are foldable connected, and said back cushion can be independently turned relative to said center cushion; and   wherein, said center cushion is connected with said support frame in a sliding way, said back cushion is connected with said support frame in a rotating way, and movable connection of said cushion assembly and said support frame enables said sofa bed to change a working state; and   when said front cushion is folded on said center cushion and said back cushion leans against said support frame, said sofa bed is in a sofa state; and   when said front cushion is turned to a plane continuous with said center cushion, and said back cushion leans against said support frame, said sofa bed is in a recliner state; and   when said center cushion is pulled out from said support frame, said front cushion and said back cushion are turned over to make said front cushion, said center cushion and said back cushion become a continuous plane, said sofa bed is in a bed state; and   the method comprises the following steps:   assembling said cushion assembly to said support frame; and   adjusting said sofa bed to a required state; and   using said sofa bed for daily life, work and entertainment.   
     
     
         18 . The method according to  claim 17 , wherein when said sofa bed needs to be adjusted to a sofa state, said back cushion is obliquely attached to said support frame to form a backrest, and an inclination angle of said back cushion can be adjusted by a user; and said front cushion and said center cushion are folded on said center cushion, so that said front cushion and said center cushion become seat cushions, and a lower part of said center cushion can be used for storing articles. 
     
     
         19 . The method according to  claim 17 , wherein when said sofa bed needs to be adjusted to the recliner state, said back cushion is obliquely attached to said support frame to form a backrest, and an inclination angle of said back cushion can be adjusted by a user, and said front cushion is turned over to make said front cushion and said center cushion become a continuous plane, and the lower part of said center cushion can be used for storing articles. 
     
     
         20 . The method according to  claim 17 , wherein when said sofa bed needs to be adjusted to the bed state, it is necessary to first turn over said front cushion to adjust said sofa bed to said recliner state, then pull out said center cushion from said support frame, and turn over said back cushion to make said front cushion, said center cushion and said back cushion become a continuous plane, and the lower part of said back cushion can be used for storing articles.