| 摘要 |
<p>A disc drive unit for driving a disc recording medium such as a magneto-optical disc (202) accommodated in a disc cassette (250), comprises a chassis (1), a cassette holder (2) having a pair of wall sections and moveable up and down between upper and lower positions with respect to the chassis (1), and the disc cassette (250) being injectable into and ejectable from the cassette holder (2), a disc rotating mechanism (340) being moveable up and down between upper and lower positions with respect to the chassis and chucked with the disc recording medium (202) for rotatively driving the disc recording medium (202), height-level positioning members (5) provided at the chassis (1), so that at least their upper ends are located at a higher level than the lower wall section of the cassette holder (2), when the cassette holder (2) is held at its lower position, and a loading motor unit (M2)for shifting the cassette holder (2) from its upper position to its lower position and for shifting the disc rotating mechanism (340) from its lower position to its upper position, during loading of the disc cassette (250). <MATH></p> |
