| 摘要 |
PROBLEM TO BE SOLVED: To prevent the occurrence of an abnormal sound at the time of a start or a stop, and to enable to consider and take measures against the abnormal sound of a photosensitive drum from a desk conception step of an electrophotography device plan by introducing conditional formulas against generation of the abnormal sound of the photosensitive drum. SOLUTION: This photosensitive drum is composed by forming a photosensitive layer on a hollow cylindrical support 1. In this case, the length of the support is 300 mm or over, and a total drum weight W1 of the support and the photosensitive layer is in the range shown by the formula (1), and also a total drum weight W2 of the support, the photosensitive layer and a heavy object furnished in the photosensitive drum is in the range shown by the formula (2). Log(W1/L<3> )<=-2.4 formula (1) Log(W2/L<3> )>-2.4 formula (2) (In the formulas, L is a length of the hollow cylindrical support (cm), and W1 is a total weight of the support and the photosensitive layer (g), and W2 is a total weight of the support, the photosensitive layer and the heavy object (g)). |
