Abstract: A lock member shifts between a lock position for locking a cassette inserted in a device body and a lock release position for releasing the lock to enable the cassette to be removed from the device body. Further, a push-out member shifts between a push-out position for coming into contact with a catch member provided in the device body and pushing out the cassette in a removing direction and a retracted position. Then, in conjunction with rotation action from a first position to a second position of a lock release member attached to the surface of the cassette to be rotatable, the lock member shifts from the lock position to the release position, and the push-out member shifts from the retracted position to the push-out position.

Abstract: A portable audio logic deck mechanism includes a main base; a driving source installed on the main base; a power transmitting unit including a pair of capstan wheels isolated from each other at a predetermined interval on the main base, a pulley installed on the main base to rotate a minute distance, a belt connecting the driving source, the capstan wheel, and the pulley to each other to transmit power, and a main gear rotating interlockingly with one of the capstan wheels; a pair of reel tables rotatably installed on the main base so that the reels of a tape cassette can be safely placed on the reel tables; an interlocking unit for transmitting power to either of the pair of reel tables being interlocked with the power transmitting unit; a recording/reproducing element for recording/reproducing information to a magnetic tape of the tape cassette; a mode changing unit for changing the rotation speed and the rotation direction of the pair of reel tables; a tension controlling unit for controlling the tension a