Patent ID: 7205690

Claim:
A motor comprising: a stator provided with a coil to be supplied with electric current; a rotor adapted to rotate in said stator and provided with a magnet; an output shaft having a screw portion to be screwed into a threaded hole provided in said rotor; a regulating portion for axially moving said output shaft by regulating rotation of said output shaft and for sliding and holding said output shaft; and a sliding portion, provided on said output shaft and adapted to slide in a sliding hole provided in said regulating portion, wherein said sliding hole is formed in such a way as to permit a screw portion of said output shaft to pass therethrough, and wherein a seal member is provided to cover a portion of said sliding hole, through which said screw portion passes when said output shaft is installed in said motor, such that said sliding hole has an inner periphery which said sliding portion does not contact.