A convertible sofa bed includes a U-shaped section having a first arm and a second arm; a first end section; a second end section; and first, second and third mattress sections; the first mattress section is rotatably joined to the second mattress section, which is rotatably joined to the third mattress section, which has a first bottom edge and an opposing second bottom edge; the first mattress section has an internal first edge and an opposing internal section edge; the internal first edge has a second portion of the first closure element, and the internal second edge has a second portion of the second closure element; the first closure element releasably joins the first end section and the first mattress section, and the second closure element releasably joins the second end section and the first mattress section.

A convertible sofa bed includes a U-shaped section having a first arm and a second arm; a first end section; a second end section; and first, second and third mattress sections; the first mattress section is rotatably joined to the second mattress section, which is rotatably joined to the third mattress section, which has a first bottom edge and an opposing second bottom edge; the first mattress section has an internal first edge and an opposing internal section edge; the internal first edge has a second portion of the first closure element, and the internal second edge has a second portion of the second closure element; the first closure element releasably joins the first end section and the first mattress section, and the second closure element releasably joins the second end section and the first mattress section.

The present disclosure relates to the technical field of electric beds, and discloses a variable chair type electric bed. The variable chair type electric bed comprises a bed frame, a bed board set, an electric telescopic rod and a guide part. After the electric bed is changed into a chair, one end of a bed board serving as a seat board is tilted, so that a human body can sit more stably and safely.

A bed to a sofa conversion frame, without a seating area, a space reserved for the traditional bed, which is a conventional manufactured mattress, or ii) a conventional manufactured mattress and a box spring, or iii) a conventional manufactured mattress and a two rail frame, optionally with a box spring. The bed to a sofa conversion frame includes a backrest, a footer (optional) and a pair of armrests configured to be connected as a solid state and or assembled together to form a sofa frame around a traditional bed, wherein the backrest is movable from a sofa position to a bed position, in order to convert the frame from a sofa configuration to a bed configuration.

A bed to a sofa conversion frame, without a seating area, a space reserved for the traditional bed, which is a conventional manufactured mattress, or ii) a conventional manufactured mattress and a box spring, or iii) a conventional manufactured mattress and a two rail frame, optionally with a box spring. The bed to a sofa conversion frame includes a backrest, a footer (optional) and a pair of armrests configured to be connected as a solid state and or assembled together to form a sofa frame around a traditional bed, wherein the backrest is movable from a sofa position to a bed position, in order to convert the frame from a sofa configuration to a bed configuration.

A convertible sofa is convertible between a sofa configuration and a bed configuration. The convertible sofa includes articulated armrests. When the convertible sofa is in a sofa configuration, the arm rests are in an arm rest configuration. When the convertible sofa is in a bed configuration, the arm rests are in a generally flat or horizontal configuration.

A convertible sofa is convertible between a sofa configuration and a bed configuration. The convertible sofa includes articulated armrests. When the convertible sofa is in a sofa configuration, the arm rests are in an arm rest configuration. When the convertible sofa is in a bed configuration, the arm rests are in a generally flat or horizontal configuration.

A method of assembling a spring inside of a tube includes providing a coil spring and a tube having a first retaining structure at a first end of the tube. The method includes positioning a rod in the tube. The spring is positioned in the tube, and a second retaining structure is attached to the rod with the spring positioned between the first and second retaining structures. A force is applied to the spring, and the second retaining structure is fixed at a position wherein the spring provides a desired preload.