Tape end detecting device in a tape player

Details Tape end detecting device in a tape player Tape end detecting device in a tape player

1983-09-16

1985-04-16

Christian, Leonard D.

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

360 742, B65H 5938, G03B 104, G11B 1532

Patent

active

045111030

ABSTRACT:
The tape end detecting device comprises a check plate disposed for frictional, rotatable engagement with a boss of one of reel bases in a tape player, a guide hole formed in the check plate and including a set region and a reset region defined by a projection extending into the guide hole, a check pin formed on a detection plate and slidably engaging the guide hole, a cam follower linked to the detection plate, first cam formed on a rotation plate for concurrent rotation with a motor power to move the cam follower along its cam surface so as to reciprocate the check pin from the set region to the reset region of the guide hole, and second cam portion formed on the rotation plate radially outward of the first cam to move the cam follower along its cam surface while the check pin engages the projection of the guide hole. The first cam includes a set cam surface to reciprocate the check pin within the set region of the guide hole and a reset cam surface to reciprocate the check pin in the reset region beyond the projection of the guide hole. The set cam surface occupies a larger revolution angle than that of the reset cam surface of the cam so that it takes a longer time for the cam follower to pass the set cam surface than it passes the reset cam surface.

REFERENCES:
patent: 3563493 (1971-02-01), Bielke et al.
patent: 4089487 (1978-05-01), Ichikawa et al.
patent: 4202513 (1980-05-01), Osanai
patent: 4210944 (1980-07-01), Fushimi et al.
patent: 4269373 (1981-05-01), Tsuchiya et al.

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