| 摘要 |
PURPOSE:To save labor in polishing an end face of a yoke, enhance the rate of heat conduction to the cover side and reduce frictional resistance on a wire, by a construction wherein a bottom surface of a cup form yoke is recessed at a part corresponding to a connecting cable as compared to the other part, and the other part makes contact with a front cover. CONSTITUTION:In a yoke 4, a surface 4B making contact with a flexible cable 19 is recessed from a surface 4A making contact with a front cover 1, and the cable 9 is fitted on the surface 4B. A recessed part of the cover and the recessed part of the yoke 4 define a space for containing the cable 19 and a terminal 18 of a bobbin 17. Therefore, a polishing area in polishing an end face of the yoke 4 is small, and labor can be greatly saved. The surface roughness and the deviation from plane surface of the polished surface can be reduced, and the rate of heat conduction to the front cover 1 side is increased. In addition, since positional accuracy of the front cover 1 and the yoke 4 is enhanced, frictional resistance exerted on a wire 10 by guides can be greatly reduced. |
