Image reading device and image forming apparatus including the same

An image reading device includes a rotating magnet unit (42) that rotates in interlock with opening and closing of a document pressing unit (2) and has a magnetic pole of an N pole and a magnetic pole of a S pole disposed at different phase positions in a rotation direction, a magnetic sensor (43) h...

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Bibliographische Detailangaben
1. Verfasser:	Akamatsu, Shinji
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CINEMATOGRAPHY DETECTING MASSES OR OBJECTS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY ELECTROGRAPHY GEOPHYSICS GRAVITATIONAL MEASUREMENTS HOLOGRAPHY MEASURING PHOTOGRAPHY PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION TESTING
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Beschreibung
Zusammenfassung:	An image reading device includes a rotating magnet unit (42) that rotates in interlock with opening and closing of a document pressing unit (2) and has a magnetic pole of an N pole and a magnetic pole of a S pole disposed at different phase positions in a rotation direction, a magnetic sensor (43) having a magnetic detection part (43a) that is installed in a reading unit or a movable body moving in a sub-scanning direction in interlock with the reading unit, and faces a peripheral surface of the rotating magnet unit (42) only when the reading unit is in a predetermined home position, and a determination unit that determines an opening and closing state of the document pressing unit (2) and determines whether the reading unit is in the predetermined home position on the basis of an output signal from the magnetic sensor (43).