Swing-type actuator

H - Electricity – 01 – F

Patent

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Details

H01F 7/06 (2006.01) G11B 5/55 (2006.01) G11B 21/08 (2006.01) H01F 41/02 (2006.01) H02K 41/035 (2006.01)

Patent

CA 2159495

A swing-type actuator (10) includes a coil (20), at least one arm (40) and a thermoplastic body (50) joining the coil (20) and arm (40). The arm (40) is preferably a planar stamping having an opening (43) to which the read/write head is mounted. A body (50) is molded around portions of the arm (40) and coil (20). A journal (52) is formed in the body (50) for receiving a shaft and bearing on which the actuator (10) pivots. A grounding pin (40B) extending through the arm (40) prevents static charge build-up. Alternatively, a portion of the arm (40) may extend into the journal (50) to contact the bearing. In another embodiment, the arm (140) includes a plastic portion (70) and a metal mounting pad (80). The plastic portion (70) may be formed of electrically conductive material to prevent static charge build-up.

Actionneur de type pivotant (10) comprenant une bobine (20), au moins un bras (40) ainsi qu'un corps thermoplastique (50) réunissant la bobine (20) et le bras (40). Le bras (40) est de préférence une pièce découpée plane présentant un orifice (43) où est montée la tête de lecture-écriture. Un corps (50) est moulé autour de parties du bras (40) et de la bobine (20). Un tourillon (52) est formé dans le corps (50) afin de recevoir un arbre et un palier sur lequel pivote l'actionneur (10). Une broche de terre (40B) s'étendant dans le bras (40) empêche la formation de charges statiques. Alternativement, une partie du bras (40) peut s'étendre dans le tourillon (50) afin d'entrer en contact avec le palier. Selon un autre modèle de cette invention, le bras (140) comprend une section en plastique (70) et un patin de fixation métallique (80). La section en plastique (70) peut être formée d'un matériau électroconducteur afin de prévenir toute formation de charges statiques.

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