| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for preventing foreign matter from intruding into a cassette inserting opening by which the foreign matter is prevented from intruding into a cassette inserting opening and moreover cost reduction is attained without necessitating any additional part. SOLUTION: After inserting a cassette 4 through a cassette inserting opening 2, the cassette 4 is moved up to the place near a cassette lid 3 opening and closing the cassette inserting opening 2, the movement of the cassette 4 is locked in the state that the back end surface 41 of the cassette 4 is positioned in the place near the cassette inserting opening 2, and the foreign matter is prevented from intruding through the cassette inserting opening 2 into the inside of the back end surface 41 of the locked cassette 4.</p> |
