| 摘要 |
PURPOSE:To increase the strength, facilitate the assembly, and reduce the cost by forming the peripheral wall of a thick part at one end side as a driven gear integrally with a photosensitive body. CONSTITUTION:The photosensitive body 20 is formed of, for example, an aluminum material in a thin drum shape and the driven gear 20a is formed integrally at one end part and has a specific tooth form and a specific number of teeth. Once a copy button is pressed, a driving source operates to rotate a main driving gear 29, and a driving gear 30 and the driven gear 20a engaging it are rotated, so that a photosensitive body 20 rotates because it is united with the driven gear 20a and performs a copying process. Flanges 21a and 21b are fitted to both side end parts of the driven gear 20a, so sufficient strength is obtained even when a copy operating device contacts the photosensitive body 20 and even when the driving gear 30 engages the driven gear 20a. The driven gear 20a is formed integrally with the photosensitive body 20, so the trouble of their mutual assembly is eliminated and fitting screws, etc., are unnecessary. |
