Patent ID: 8006829

Claim:
A motorized roller, comprising: a roller body having both ends; a plurality of fixed shafts with one of the fixed shafts protruding out of each of the both ends of the roller body; and a motor housed in the roller body, wherein rotation of the motor rotates the roller body around the fixed shafts, at least one of the fixed shafts having a cavity and having a first connector at an inside or a distal end of the fixed shaft so as to electrically conduct between inside and outside of the roller body by connection of a separately prepared second connector to the first connector, wherein the fixed shaft is hollow and has an inner periphery and a first engaging part for preventing disengagement of the second connector, so that a part of the second connector is mechanically engaged with the first engaging part, including the second connector, the first connector being arranged within the fixed shaft, the first engaging part being formed on the inner periphery of the fixed shaft, and the second connector having a second engaging part at an outer periphery of the second connector, so that the second connector is attached to the fixed shaft by engagement of the first engaging part with the second engaging part.