| 摘要 |
PURPOSE:To reduce the contact pressure of a main magnetic pole and to prevent the damage of a vertically magnetized film face and to lessen the wear of the main magnetic pole, by allowing a holding member to support the main magnetic pole, which has the end face brought into contact with the vertically magnetized film, through a buffer member. CONSTITUTION:Plural coils 17 and 18 are fixed to a supporting plate 16 to constitute a movable part A of an actuator, and the center part of the supporting plate 16 is connected and fixed to the center part of a supporting material 12, which consists of an elastic plate such as a phosphor bronze plate, through a connecting material 14 consisting of an elastic material (such as rubber), and a turning fulcrum is given to the supporting plate 16 by a turning fulcrum member 15. Since both end parts of the supporting material 12 are held between supporting pieces 13a and 13b consisting of rubber materials or the like, the movable part A is displaced easily in the longitudinal direction by the supporting material 12 and is turned easily by the turning fulcrum member 15. Buffer members 4a and 4b consisting of, for example, rubber are fixed to the supporting plate 16, and base parts of legs 5a and 5b of a forked cantilever 5 are fitted to buffer members 4a and 4b, and therefore, a main magnetic pole (mp) attached to the tip part of the cantilever 5 is brought into contact with the surface of the vertically magnetized film with a prescribed small contact pressure by the elasticity of buffer members 4a and 4b. |
