Lock-releasing mechanism for magnetic record/playback apparatus

Claim 1

A lock-releasing mechanism for a magnetic record/playback apparatus, which comprises: a magnetic tape auto-reverse means; a fast forward and fast rewind-operating means; a plunger for actuating said auto-reverse means, said plunger being adapted to be energized for auto-reverse operation and for automatic music sensing operation and having an actuation stroke associated therewith; a lock means for locking said fast forward and fast rewind-operating means in a fast forward and fast rewind position; a lock-releasing means interlocked with said plunger to release the locking of the lock means upon energization of said plunger for automatic music sensing operation; and a regulating means interlocked with said fast forward and fast rewind-operating means for restricting the actuating stroke of said plunger when energized for the automatic music sensing operation so that said auto-reverse means is kept inoperative, said fast forward and fast rewind-operating means being comprised of a fast forward operating member and a fast rewind operating member and said lock means is engageable with said operating members, said lock means including an off-member, each of said operating members having a locking cutout engageable with said roller, said regulating means including a stopper member pivotally supported on said off-member and a spring member for normally biasing said spring member to keep it in an inoperative position.