Single-unit convertible bed, desk, and couch furniture with extensible bed frame

A furniture convertible between a day bed, desk, and couch, comprising:

• an external frame;
• a bed frame rotatably coupled to the external frame;
• a desk rotatably coupled to the bed frame such that the desk is raised or lowered when the bed frame is raised or lowered respectively and such that the desk remains horizontally oriented while it is being raised or lowered;
• a first triangular link pivotally connected to the bed frame and the desk;
• a connecting rod pivotally connected to the external box frame and the desk;
• the bed frame pivotally connected to the external frame;
• wherein the triangular link and a first pivot connecting the connecting rod to the desk are substantially in the same vertical plane;
• wherein a bed pivot connecting the bed frame to the external frame and a second pivot connecting the connecting rod to the external frame are substantially in the same plane;
• and
• the bed pivot located within a perpendicular flange extending above a horizontal upper surface of the bed frame;
• and
• a mattress and a foldable mattress topper;
• a bed frame extension capable of being coupled to the bed frame;
• and
• a supporting member for supporting the bed frame extension,
• wherein the furniture has a couch configuration wherein the foldable mattress topper is repositioned as a backrest, the bed frame extension and the supporting member such that the mattress and the foldable mattress topper are capable of being configured to form a larger sleeping area in a bed configuration.

A furniture convertible between a bed, desk, and couch, comprising:

• an external frame having two opposing side walls and an inner wall;
• a bed frame pivotally connected to the external frame;
• a mattress placed on the bed frame;
• a desk, having a rectangular surface extending from the inner wall;
• a first triangular link pivotally connected to the bed frame and the desk;
• a connecting rod pivotally connected to the external frame and the desk;
• wherein the triangular link and a first pivot connecting the connecting rod to the desk are substantially in the same vertical plane;
• wherein a bed pivot connecting the bed frame to the external frame and a second pivot connecting the connecting rod to the external frame are substantially in the same plane;
• and
• the bed pivot located within a perpendicular flange extending above a horizontal upper surface of the bed frame;
• and
• a foldable mattress topper;
• wherein the furniture is capable of assuming a couch configuration when the foldable mattress topper is folded and placed against the inner wall of the external frame and on top of the mattress when in a bed configuration.