| 摘要 |
PROBLEM TO BE SOLVED: To provide a driving device improved in accuracy and prevented from the generation of the engaging vibration or rotation ununiformity of the gear and the generation of noise by improving the roundness of tooth flank of a gear. SOLUTION: A part or the whole of a rotation center axis part la and a connecting part 1c is manufactured by injection molding or extrusion molding as figure (a) shows. After the manufactured material shown by fig. (a) is shrunk, the resin made gear manufactured by injection molding or extrusion molding while combining the remaining connecting part 1q and the tooth flank 1b with the outer peripheral surface of the manufactured material as shown by figure (a) is used in the driving device. |
