| 摘要 |
PURPOSE:To prevent a leaf spring from being broken so that a head may be long-lived by providing each leaf spring shaped almost like a pedal gradually spreading in width from a center toward an external circumference on a cluster plate 10 for leaf springs. CONSTITUTION:A cluster plate 10 for leaf springs is composed of plural leaf springs 11 as if to represent a radial form. Leaf springs 11 form almost a pedal- like pattern spreading gradually in width from a center toward an external circumference. In addition, each leaf spring 11 has an H shape slit 13, thus forming a lingulate piece 14a, 14b. An armature 15 has its rear fixed to the external circumference of the leaf spring 11. In a condition where an electromagnetic coil 5 is not energized, the armature 15 fixed to the leaf spring 11 is sucked to a core 4, and a coupled of forces acts on a fixing point 16a for the leaf spring 11 and the armature 15. However, it is possible to reduce a stress on the leaf spring by increasing the width of leaf spring at the fixing side of the armature. |
