Transmission mechanism for magnetic-field generating device in photo-magnetic type recording/reproducing apparatus

A recording/reproducing apparatus comprising:

• optical pickup means for applying a light beam to a recording medium to receive light reflected from said recording medium;
• drive means for moving said optical pickup means relative to said recording medium;
• magnetic-field generating means for generating a magnetic field on said recording medium;
• arm means for holding said magnetic-field generating means, said arm means being pivotally arranged so as to displace said magnetic-field generating means relative to said recording medium;
• and
• actuating means pivotally moving said arm means in a first direction so as to displace said magnetic-field generating means toward a center of the recording medium when said drive means moves said optical pickup means toward the center of the recording medium, and in a second direction opposite to said first direction so as to displace said magnetic-field generating means away from the center of the recording medium when said drive means moves said optical pickup means away from the center of the recording medium, said actuating means having a first engaging member fixed to said optical pickup means and a second engaging member fixed to said arm means, and said actuating means pivotally moves said arm means by engagement of said first and second engaging member.

A recording/reproducing apparatus comprising:

• optical pickup means for applying a light beam to a recording medium to receive light reflected from said recording medium;
• magnetic-field generating means for generating a magnetic field on said recording medium;
• drive means for moving said optical pickup means relative to said recording medium in a range within and outside a recording area of said recording medium;
• and
• power transmission means for transmitting a driving power of said drive means to said magnetic-field generating means so as to move said magnetic-field generating means relative to said recording medium when said drive means moves said optical pickup means outside the recording area of said recording medium, while said power transmission means is prevented from transmitting said driving power to said magnetic-field generating means when said drive means moves said optical pickup means within the recording area of said recording medium.

A recording/reproducing apparatus comprising:

• optical pickup means for applying a light beam to a recording medium to receive light reflected from said recording medium:
• drive means for moving said optical pickup means relative to said recording medium;
• magnetic-field generating means for generating a magnetic field on said recording medium;
• biasing means for biasing said magnetic-field generating means in a direction toward a position where said magnetic-field generating means faces a recording area of said recording medium;
• and
• power transmission means, provided on said optical pickup means, for moving said magnetic-field generating means against a biasing force of said biasing means by engagement with said magnetic-field generating means.