JPS551602A - Rotation stop detection unit - Google Patents

Abstract

PURPOSE: To detect the rotation stop of a reel stand, etc., with a high response in a simple constitution by forming a switch by an armature, which continues the slide dependent upon a cam, etc., uniting with driving materials, and an armature which slides according to the rotation of driven materials dependent upon friction.

CONSTITUTION: Elastic armature 6 is slided by cam 2 which is rotated together with driving materials such as a pulley, which always rotated, in one body. The driving force of driving materials is transferred frictionally, and armature 5 which is frectionally brought into contact with stand 4, etc., by the rotation of driven materials such as rotating reel stand 4 receives the sliding force toward one direction from stand 4, etc., in a high speed and slides according to the slide of armature 6 while contacting with armature 6. Consequently, when stand 4, etc., stops due to the tape end, armature 5 where the sliding force is not transferred from stand 4. etc., has stopper 9 stopped at the restricted position, and armatures 6 and 5 are intermittently brought into contact with each other, and lamp 10, etc., dependent upon armatures 6 and 5 forming a switch is flashed, so that a high-response rotation stop detection unit having no time delay can be obtained in a simple constitution because capacitors, etc., are needless in comparison with the electric pulse system.

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