Floppy disc drive chucking device

A floppy disc drive chucking device, comprising:

• a rotor yoke which rotates in a certain direction;
• a center shaft, provided in a standing manner at the center of rotation of the rotor yoke, for being loosely inserted into a center hole formed in a center hub of a floppy disc;
• a magnetic disc, placed on and affixed to the rotor yoke, for magnetically attracting the center hub of the floppy disc;
• a drive arm provided at a lower side of the rotor yoke so as to extend along a circumference thereof, both ends of the drive arm being loosely suspended from the rotor yoke or the magnetic disc, the drive arm being held as a result of being attracted upward;
• a drive pin formed on a front portion of the drive arm in a direction of rotation of the rotor yoke, the drive pin loosely passing through an arm receiving hole so as to extend upward, the arm receiving hole being formed in the rotor yoke or the magnetic disc, or in the rotor yoke and the magnetic disc, the drive pin being provided for being loosely inserted into a hole formed in a peripheral edge of the center hub and defined by a front edge and an outer edge, the front edge being formed in correspondence with a front portion of the rotor yoke in the direction of rotation of the rotor yoke, and the outer edge being formed away from the center of rotation of the rotor yoke;
• a sliding portion formed on a back portion of the drive arm in the direction of rotation of the rotor yoke, the sliding portion being formed so as to come into contact with a back portion defining the arm receiving hole;
• and
• a guide path formed at a location where a side of the guide path comes into contact with the sliding portion disposed at the back portion of the arm receiving hole, the side of the guide path gradually inclining backwards as the side of the guide path extends away from the center of rotation of the rotor yoke;
• wherein when the rotor yoke with the floppy disc placed thereon is rotated, the entire drive arm moves away from the center of rotation of the rotor yoke, so that the drive pin is pushed towards the front edge and the outer edge defining the hole formed in the center hub.