JPH0268330U

JPH0268330U -

Info

Publication number: JPH0268330U
Application number: JP14816188U
Authority: JP
Priority date: 1988-11-14
Filing date: 1988-11-14
Publication date: 1990-05-23

Description

[Brief explanation of drawings]

図は何れも本考案の一実施例を示し、第１図は
外部接続回路図、第２図は内部の機能ブロツク図
、第３図はフローチヤートをそれぞれ示す。１５…光源制御手段、９，１０…第１・第２周
期カウンタ。 Each figure shows an embodiment of the present invention, with FIG. 1 showing an external connection circuit diagram, FIG. 2 showing an internal functional block diagram, and FIG. 3 showing a flowchart. 15... Light source control means, 9, 10... First and second cycle counters.

Claims

[Scope of Claim for Utility Model Registration] A tape end or top detection mechanism that detects the passage of transparent tape placed at the beginning and end of the tape using a light source that enters the cassette when the cassette is installed and a pair of light receiving elements placed on both sides of the cassette. and cycle counting means 9, 10, and 11 that count the cycles of the rotation detection pulses of the pair of reel stands and generate cycle count information, respectively, and both of the cycle count information are equal to or greater than a predetermined value during the constant speed running period of the tape. lighting control means 12, 13, 14, 1 that detects that the light source is turned off and turns off the light source;
5. A tape end detection circuit comprising: 5 and 5 respectively.