Fixing structure for cushion layer of sofa bed and sofa bed

Abstract

A fixing structure for a cushion layer of a sofa bed is provided. The sofa bed includes a left armrest, a right armrest, and a bed frame. A position of the bed frame is fixedly located between the left armrest and the right armrest, and the bed frame is disposed with an elastic layer and a cushion layer in sequence. The elastic layer includes a plurality of first connecting members spaced apart from each other in a circumferential direction of the elastic layer. A lower surface of the cushion layer includes a plurality of second connecting members spaced apart from each other in a circumferential direction of the cushion layer, and the plurality of first connecting members are connected to the plurality of second connecting members through one or more intermediate connecting members.

What is claimed is: 
     
         1 . A fixing structure for a cushion layer of a sofa bed, wherein:
 the sofa bed comprises a left armrest, a right armrest, and a bed frame,   a position of the bed frame is fixedly located between the left armrest and the right armrest,   the bed frame is disposed with an elastic layer and a cushion layer in sequence,   the elastic layer comprises a plurality of first connecting members spaced apart from each other in a circumferential direction of the elastic layer,   a lower surface of the cushion layer comprises a plurality of second connecting members spaced apart from each other in a circumferential direction of the cushion layer, and   the plurality of first connecting members are connected to the plurality of second connecting members through one or more intermediate connecting members.   
     
     
         2 . The fixing structure for the cushion layer of the sofa bed according to  claim 1 , wherein:
 the plurality of first connecting members and the plurality of second connecting members are insertion slots, and   the one or more intermediate connecting members are respectively connected to the plurality of first connecting members and the plurality of second connecting members.   
     
     
         3 . The fixing structure for the cushion layer of the sofa bed according to  claim 2 , wherein:
 each of the one or more intermediate connecting members comprises a connecting belt and two insertion blocks disposed at two ends of the connecting belt.   
     
     
         4 . The fixing structure for the cushion layer of the sofa bed according to  claim 1 , wherein:
 the elastic layer comprises a plurality of elastic units arranged in an array arrangement,   each of the plurality of elastic units is disposed with a corresponding set of the plurality of first connecting members respectively located on two first sides of a corresponding one of the plurality of elastic units in a transverse direction of the array arrangement and two second sides of the corresponding one of the plurality of elastic units in a longitudinal direction of the array arrangement, and   adjacent two first connecting members that respectively belong to adjacent two elastic units of the plurality of elastic units are connected by a corresponding one of the one or more intermediate connecting members.   
     
     
         5 . A sofa bed, comprising:
 a structural frame,   a cushion layer, and   an elastic layer, wherein:
 the cushion layer is connected to the elastic layer through the fixing structure according to  claim 1 . 
   
     
     
         6 . The sofa bed according to  claim 5 , wherein:
 the structural frame comprises the left armrest, the right armrest, the bed frame, and a bed board,   the bed frame comprises a first bed frame and a second bed frame arranged in sequences along a width direction of the left armrest and the right armrest,   the first bed frame is fixedly connected to and located between the left armrest and the right armrest,   the second bed frame is rotatably connected to and located between the left armrest and the right armrest, and   the bed board is respectively connected to the first bed frame and the second bed frame.   
     
     
         7 . The sofa bed according to  claim 6 , wherein:
 the second bed frame is configured to be in a first position and a second position relative to the first bed frame,   when the second bed frame is in the first position, an angle between the first bed frame and the second bed frame is 180°, and   when the second bed frame is in the second position, the angle between the first bed frame and the second bed frame is less than 180°.   
     
     
         8 . The sofa bed according to  claim 6 , wherein:
 each of the left armrest and the right armrest is disposed with a folding hinge to enable the left armrest and the right armrest to be rotatably connected to the second bed frame,   the folding hinge comprises a first supporting arm and a second supporting arm,   a first end of the first supporting arm and a first end of the second supporting arm are pivotally connected to each other,   a second end of the first supporting arm is fixedly connected to a corresponding one of the left armrest or the right armrest, and   a second end of the second supporting arm is fixedly connected to the second bed frame.   
     
     
         9 . The sofa bed according to  claim 6 , wherein:
 the left armrest and the right armrest are fixedly connected by a lateral rod.   
     
     
         10 . The sofa bed according to  claim 9 , wherein:
 the lateral rod comprises one or more position-provided recesses, and   when the second bed frame is in a first position, one or more parts of the second bed frame that abut the lateral rod are disposed in the one or more position-provided recesses.   
     
     
         11 . The sofa bed according to  claim 6 , wherein:
 the first bed frame comprises a plurality of first insertion holes located on two first side frames of the first bed frame along a length direction of the sofa bed,   the second bed frame comprises a plurality of second insertion holes located on two second side frames of the second bed frame along the length direction of the sofa bed, and   the plurality of first insertion holes and the plurality of second insertion holes are configured to fix the bed board.   
     
     
         12 . The sofa bed according to  claim 11 , wherein:
 a first side frame of the first bed frame and a first side frame of the second bed frame facing away from each other respectively comprises a first inner surface and a second inner surface on which a first set of the plurality of first insertion holes and a first set of the plurality of second insertion holes are respectively located at intervals, and   a second side frame of the first bed frame and a second side frame of the second bed frame facing each other respectively comprises a first upper surface and a second upper surface on which a second set of plurality of first insertion holes and a second set of the plurality of second insertion holes are respectively located at intervals.   
     
     
         13 . The sofa bed according to  claim 12 , wherein:
 the bed board comprises a plurality of grid-shaped bed board units,   a first side of each of the plurality of grid-shaped bed board units comprises a plurality of first insertion pins extending along a horizontal direction, and   a second side of each of the plurality of grid-shaped bed board units comprises a plurality of second insertion pins extending along a height direction.   
     
     
         14 . The sofa bed according to  claim 6 , wherein:
 a surface of the bed board is disposed with a plurality of fixing members spaced apart from each other and configured to be connected to the elastic layer.   
     
     
         15 . The sofa bed according to  claim 14 , wherein:
 the plurality of fixing members are I-shaped protrusions extending in a height direction.