| 摘要 |
An ink detecting device comprises a transparent member, light emitting means (3) for emitting light provided in a given position along the shifting passage of ink reservoir means to emit light to the transparent member (2) arriving at the given position, light receiving means (4) for receiving the light emitted from light emitting means (3) and totally reflected at least once on the inner surface of the transparent member (2) in ink reservoir means. The light emitted from light emitting means (3) to the transparent member reaches light receiving means (4) when totally reflected at least once on the inner surface of ink reservoir means not contacting the ink, and is transmitted without any total reflection through the inner surface of ink reservoir means contacting the ink, and detecting means for detecting per ink reservoir means whether light receiving means has received the light or not when plural ink reservoir means arrive at the given position.
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