| 摘要 |
PROBLEM TO BE SOLVED: To provide a cylindrical electrophotographic photoreceptor and an electrophotographic device excellent in the meshing accuracy of the driving gear of a cylindrical electrophotographic photoreceptor and capable of accurately controlling and rotating the photoreceptor. SOLUTION: In the cylindrical electrophotographic photoreceptor 1 where a flange 3 is fit at the end of a cylindrical photoreceptor drum 2 and the driving gear made of synthetic resin is integrally or independently attached to the flange 3, the driving gear simultaneously satisfies an expression I: m[Z invα+π(n-0.5)]+m/5>D(n) and an expression II: D(n)> m[Zinvα+π(n-0.5)]Cosα+m/10 (wherein the symbols stand for following values in the expressions I and II. D(n): displacement over a given number of teeth (n), m: the module of the gear,α: a pressure angle, Z: the total number of teeth, and n: displacement number). |
