Abstract: Disclosed is an electric bed with an adjustable bed length, containing an upper head bed frame, an upper foot bed frame, a lower bed frame, and a plurality of bedboards, wherein at least one of the plurality of bedboards is pivotable relative to the lower bed frame, wherein either of the upper head bed frame and the upper foot bed frame is fixed/immobile relative to the lower bed frame while the other contains a moving component which moves back and forth relative to the lower bed frame between a rest position and an extension position, wherein the at least pivotable bedboard keeps horizontal and the upper head bed frame is away from the upper foot bed frame by Distance 1 when the moving component is located at the rest position, while the at least one pivotable bedboard pivots and there is Distance 2 between the upper head bed frame and the upper fool bed frame when the moving part is located at the extension position, wherein Distance 2 is longer than Distance 1.

Abstract: An electric bed with an adjustable bed length, containing an upper head bed frame, an upper foot bed frame, a lower bed frame, and a plurality of bedboards. Wherein at least one of the plurality of bedboards is pivotable relative to the lower bed frame. Wherein either of the upper head bed frame and the upper foot bed frame is fixed/immobile relative to the lower bed frame while the other contains a moving component which moves back and forth relative to the lower bed frame between a rest position and an extension position. Wherein the at least pivotable bedboard keeps horizontal and the upper head bed frame is away from the upper foot bed frame by Distance 1 when the moving component is located at the rest position, while the at least one pivotable bedboard pivots and there is Distance 2 between the upper head bed frame and the upper foot bed frame when the moving part is located at the extension position. Wherein Distance 2 is longer than Distance 1.

Abstract: Disclosed is an electric bed with an adjustable bed length, containing an upper head bed frame, an upper foot bed frame, a lower bed frame, and a plurarity of bedboards, wherein at least one of the plurarity of bedboards is pivotable relative to the lower bed frame, wherein either of the upper head bed frame and the upper foot bed frame is fixed/immobile relative to the lower bed frame while the other contains a moving component which moves back and forth relative to the lower bed frame between a rest position and an extension position. The bed length is adjusted in the above-mentioned way to overcome the defect in the traditional electric bed where the bed length is shortened after the posture is changed, causing part of the matress to have no support basis.