| 摘要 |
PURPOSE:To facilitate the formation of precise gear teeth by a method wherein a fixed member or revolving member is made of a resin material mixed with highly permeable metallic powder. CONSTITUTION:A fixed member 1 made of resin material mixed with metallic powder such as highly permeable iron powder, nickel powder and the like is projectingly formed together with gear teeth 2 formed above the fixed member 1 so that the gear teeth 2 similar to the number of scanning lines may be arranged at the same interval in the circumferential direction while the coils 3 for transmitting signals are assembled into said fixed member 1. Through these procedures, the shape and arrangement of said gear teeth may be made very precise facilitating the generation of precise signals for scanning lines. |
