| 摘要 |
PURPOSE:To enable component parts to be fitted with high accuracy without requiring fixing members such as small screws, by providing a magnetic member functioning also as a reference for positioning, a member provided with radial slits, and a member for positioning the slitted member. CONSTITUTION:A core block 6 is positioned on a frame 1 in conformity with a dowel 3, center holes of a closed-end cylindrical yoke 10 and a disk form side yoke 12 are engaged to a cylindrical part 4 of the frame 1, and radial slits 11, 13 of the yokes 10, 12 are engaged to positioning guide pieces 9, 9 projected from a coil bobbin 8, thereby sequentially placing the members on the core block 6. Accordingly, the slitted member can be positioned with respect to the axial direction and the circumferential direction, with the magnetic member and the member projected from the coil core of the magnetic member as references, and a plurality of print wire driving members guided by the slits can be positioned on the coil core through projected members engaged to the slits, so that all members can be accurately positioned. |
