| 摘要 |
A cassette comprises a movable member supported on a box member for movement in a direction normal to an swing axis, around which a cover member swings, and an engaging claw combined with the movable member. The movable member is urged to one side of the direction along which the movable member moves. A stopper secured to the box member receives the urged movable member and holds it at a locking position. An engaged claw, which is mounted on the cover member, is engaged with the engaging claw of the movable member located at the locking position and locks the cover member when it is closed. The engaged claw is disengaged from the engaging claw when the movable member moves a predetermined distance oppositely to the direction of the urging of the movable member. A cover opening mechanism is constituted of a pushing member mounted on the movable member and a pushed member mounted on the cover member. The pushing member and/or the pushed member has a slant surface inclined with respect to the direction along which the movable member moves. The pushing member pushes the pushed member to swing the cover member in a direction that opens the cover member when the movable member moves oppositely to the direction of the urging of the movable member.
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