Recorder/reproducer

A recording/reproducing apparatus, comprising:

• a chassis on which an optical pickup and a disc rotation driving part are provided;
• a cartridge holder configured to receive a disc cartridge, in which a magneto-optical disc that can be recorded or reproduced is enclosed in a rotatable state, and to hold the disc cartridge, the cartridge holder being attached to the chassis and configured to rotate between a loading position at which the magneto-optical disc inside the held disc cartridge is chucked onto the disc rotation driving part, and an eject position at which the disc cartridge is ejected;
• a magnetic head disposed so as to face the optical pickup on an upper surface side of the cartridge holder and configured to be moved via an opening between a lowered position, inserted into the disc cartridge and close to the magneto-optical disc, and a raised position away from the magneto-optical disc;
• a first sliding member including a first guide groove and configured to move relative to the cartridge holder at a side part parallel with a direction in which the disc cartridge is inserted into the cartridge holder;
• a second sliding member including a second guide groove, coupled to the cartridge member, and configured to move with the disc cartridge, relative to the cartridge holder, between the eject position and the loading position, said second sliding member located so as to overlap with the first sliding member;
• a head raising/lowering mechanism coupled to the first sliding member and configured to move the magnetic head between the raised position and the lowered position by moving the first sliding member in the direction of insertion of the disc cartridge;
• a driving mechanism disposed on a lower surface side of the chassis and configured to engage the first sliding member and to move the first sliding member;
• and
• a shaft member, disposed within the first guide groove and the second guide groove, configured to separate the first sliding member from the second sliding member,
• wherein the first sliding member and the second sliding member are disposed so as to overlap in an axial direction of the shaft member.