Electric bed having no bed board and being covered in material

Abstract

An electric bed having no bed board and being covered with a surface material includes: a foldable bedframe jointed through connectors and connected with bed legs, overturningly foldable frames disposed on the bedframe, a drive device disposed on the bedframe ( 1 ), a surface material covered directly onto a plurality of frames, and a tensioning mechanism for tensioning the surface material at a surface of the frames; the tensioning mechanism includes embedded strips and pipes, and may further include a clamp fastener; when the surface material is in a tensioned state, an embedded strip connected at one end of the surface material is limited within a limiting slot of a pipe at one side, and another embedded strip connected at another end of the surface material is limited within a limiting slot of another pipe at the opposite side.

1 . An electric bed having no bed board and being covered with a surface material, comprising:
 a foldable bedframe jointed through connectors and connected with bed legs;   a plurality of overturningly foldable frames arranged on the bedframe; and   a driving device arranged on the bedframe;   characterized in that, the electric bed further comprises:   a surface material covered directly onto a surface of the plurality of frames and for wrapping a soft material; and   a tensioning mechanism for tensioning the surface material on the surface of the frames.   
     
     
         2 . The electric bed having no bed board and being covered with a surface material according to  claim 1 , characterized in that, the surface material is filled with a fluffy product therein, and an edge of the surface material is sewn with a center seam, inside which at least part of an embedded strip is inserted. 
     
     
         3 . The electric bed having no bed board and being covered with a surface material according to  claim 1 , characterized in that, sponge, latex, a cotton product or a polyester product is filled between the surface material and the surface of the frames. 
     
     
         4 . The electric bed having no bed board and being covered with a surface material according to  claim 3 , characterized in that, there is a layer of plastic board or wood board between the surface material and the surfaces of the frames. 
     
     
         5 . The electric bed having no bed board and being covered with a surface material according to  claim 3 , characterized in that, the tensioning mechanism includes pipes and embedded strips, wherein an embedded strip is at least partially inserted into a center seam that is at an edge of one end of the surface material, and a part of another embedded strip is connected to a center seam that is at an edge of another end of the surface material, and wherein each embedded strip is placed inside a limiting slot formed within a pipe to limit rotation of the embedded strip. 
     
     
         6 . The electric bed having no bed board and being covered with a surface material according to  claim 5 , characterized in that, each pipe is arranged at an edge of each of the frames, and the limiting slot for inserting the embedded strip is formed inside each pipe, wherein corners of an outer surface and a notch of the limiting slot of each pipe are treated with a curved surface, and wherein a width of the notch of the limiting slot is smaller than a width of the limiting slot. 
     
     
         7 . The electric bed having no bed board and being covered with a surface material according to  claim 6 , characterized in that, a shape of the limiting slot is a circle, an ellipse, a rectangle or a trapezoid having an opening. 
     
     
         8 . The electric bed having no bed board and being covered with a surface material according to  claim 6 , characterized in that, in a tensioned state, an embedded strip that is connected to one end of the surface material is limited within a limiting slot of a pipe arranged at one side, and another embedded strip that is connected to another end of the surface material is limited within a limiting slot of another pipe arranged at an opposite side. 
     
     
         9 . The electric bed having no bed board and being covered with a surface material according to  claim 6 , characterized in that, in a tensioned state, one side of the limiting slot limits one side or end of the embedded strip, and an opposite side of the limiting slot or a clamp fastener clamped into the limiting slot prevents another side or end of the embedded strip from moving. 
     
     
         10 . The electric bed having no bed board and being covered with a surface material according to  claim 5 , characterized in that, the tensioning device further comprises a clamp fastener, one end of which extends into the limiting slot, another end of which is attached to an outer surface of the pipe, wherein a part of a surface of the clamp fastener that is in the limiting slot is provided with stoppers to prevent the clamp fastener from slipping out of the limiting slot. 
     
     
         11 . The electric bed having no bed board and being covered with a surface material according to  claim 1 , characterized in that, a rear support connecting rod is provided between a frame and the bedframe, wherein the rear support connecting rod is connected to the bedframe with one end using a sheet metal and to the frame with another end. 
     
     
         12 . The electric bed having no bed board and being covered with a surface material according to  claim 11 , characterized in that, the rear support connecting rod are connected to the frame through a step screw, a plastic shaft sleeve, and a plastic gasket to implement a shaft connection, wherein the step screw or bolt strings in turn the plastic shaft sleeve and the plastic gasket, and the plastic shaft sleeve is placed inside a through hole of the sheet metal corresponding to the frame, and wherein the plastic gasket is arranged on one side of the through hole. 
     
     
         13 . The electric bed having no bed board and being covered with a surface material according to  claim 11 , characterized in that, the frame is further provided with a decorative frame which adopts a zigzag structure, wherein the decorative frame is stuck in steel frame structure of a reserved hole, inside of which is equipped with a plastic hole sleeve. 
     
     
         14 . A method for fixing a surface material on a surface of an electric bed, the method being used to install a soft-pack surface material on the surface of the electric bed having no hard bed board, characterized in that, the method comprises:
 inserting an embedded strip having hardness and elasticity into a center seam pre-sewn at an edge of the surface material;   pulling the embedded strip such that the surface material comes to a tensioned state;   inserting the embedded strip into a pipe having a limiting slot and located at an edge of a frame of the electric bed such that the embedded strip is stuck in the limiting slot within the pipe.   
     
     
         15 . The method according to  claim 14 , characterized in that, a method for the embedded strip to be stuck in the pipe includes diagonally embedding the embedded strip that is in a tensioned state in the limiting slot so that at least one side or end of the embedded strip is limited at one side of the limiting slot and an opposite side of the limiting slot or a clamp fastener clamped into the limiting slot prevents another side or end of the embedded strip from rotating.