| 摘要 |
A door mechanism for a cassette insertion opening in an audio device comprises an inner door pivotally supported along one edge of the cassette insertion opening; an outer door pivotally supported along the opposite edge of the cassette insertion opening and having depressions formed along the edge remote from the pivotal axle and a packing member attached to the periphery of the inner face for forcible contact with the wall surrounding the cassette insertion opening; lock means consisting of lock arms engageable with the depressions of the outer door when the outer door is closed and unlocking arms actuated by the inner door when the inner door is fully opened, the lock means being always biased to the position for locking the outer door and being rotated to the unlocking position upon the actuation of the unlocking arms by the fully opened inner door and upon an operation of a door opening button provided on a front panel of the audio device, for example.
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