Patent ID: 8099743

Claim:
A slot-in type disk apparatus in which a base body and a lid constitute a chassis outer sheath, a front surface of said chassis outer sheath is formed with a disk inserting opening from which a disk is directly inserted, said base body is provided with a traverse base, said traverse base is provided with a spindle motor, a pickup and driving means for moving said pickup, said slot-in type disk apparatus is provided with a traverse moving means which displaces said traverse base between said base body and said lid, and said traverse base moving means comprises a loading motor provided on said chassis outer sheath, a slider which slides by driving of said loading motor, and a traverse cam member which is operated by movement of said slider, wherein said disk apparatus comprises a spindle motor support portion which holds said spindle motor, a spindle cam member which is operated by movement of said slider, a clutch plate configured to move toward and away from said traverse base by said spindle cam member, and a motor spring having a biasing force and disposed between said spindle motor support portion and said clutch plate, wherein said clutch plate has a set stroke B and is positioned to move toward said traverse base, and said spindle motor has a set stroke A and is positioned to move toward said disk, to compress said motor spring, with the stroke B of the clutch plate being greater than the stroke A of the spindle motor such that the biasing force of the motor spring is applied only to an over stroke portion of the clutch plate after the spindle motor is moved upward.