| 摘要 |
PURPOSE:To attain the accurate horizontal positioning at least with the screw attachment part of a pad attachment plate and to obtain the reproduced picture with no disturbance, by forming the recess and projection parts which interlock the upper end of a fixed shaft and the lower end of a screw respectively. CONSTITUTION:A conical recess part 32 is formed at the upper end of the fixed shaft 11; while a projection part 33 interlocking the part 32 is provided at the lower end of the screw 30 of a pad attachment plate 25. When the plate 25 is faced opposite to a magnetic sheet 4 with a cover closed, the part 33 of the screw 30 is set into the part 32 of the shaft 11. The attachment part of the screw 30 of the plate 25 is positioned accurately by the shaft 11 in the horizontal direction, i.e., in the direction intersecting orthogonally with the shaft 11. Therefore a pulse generator 31 provided at a place near the screw 30 is positioned with comparatively high accuracy.
|
