Rotary encoder

A rotary encoder includes a roller having substantially cylindrical shape, an inner shaft, a translucent cylindrical light guide shaft, a pair of holders, a light-emitting device, and a light-detecting device. The inner shaft is inserted and secured to a center hole of the roller, and has a slit at...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	YOMOGISATO TAKAJI, KOTANI RYUMI
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS BASIC ELECTRIC ELEMENTS ELECTRIC SWITCHES ELECTRICITY EMERGENCY PROTECTIVE DEVICES INDUCTANCES MAGNETS MEASURING MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR PHYSICS RELAYS SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES SELECTORS TARIFF METERING APPARATUS TESTING TRANSFORMERS
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Beschreibung
Zusammenfassung:	A rotary encoder includes a roller having substantially cylindrical shape, an inner shaft, a translucent cylindrical light guide shaft, a pair of holders, a light-emitting device, and a light-detecting device. The inner shaft is inserted and secured to a center hole of the roller, and has a slit at one end along a direction parallel to the axis thereof. The light guide shaft is inserted in the inner shaft so that one end of it is surrounded by the slit, and this guide has a first and second planes, and a first and second inclined planes. The first and second planes are formed on a lower side at both ends of the light guide shaft in parallel to the axis of the shaft. The first and second inclined planes are formed above the first and second planes at an angle of 45 degrees to the axis of the shaft, so that the two planes are substantially orthogonal to each other.