| 摘要 |
<p>A developer detection device includes: a rotating member (60, 61) including a first part (60) and a second part (61) being joined to the first part (60), the first part (60) having a light-blocking section (60b) and a light-passing section (60c), the second part (61) temporarily stopping rotating at a rotation position corresponding to a developer upper surface (9a) position of developer (9) stored in an accommodating container (33); a rotation driving member (62) pushing the rotating member (60, 61) in a predetermined rotation direction; and a detecting unit (63, 64, 65) including a light-emitting unit (64) and a light-receiving unit (65); wherein the rotating member (60, 61) is formed so that when the second part (61) is at a lower position in the accommodating container (33), the light-passing section (60c) is positioned on an optical path from the light-emitting unit (64) to the light-receiving unit (65).</p> |
