Actuator for disk device
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorTetsuya Takashima
Life of this patent
Estimating the term…
Abstract
In an actuator having a coil disposed between yokes opposing to each other via a specified space, stepped portions are formed at the inner sides of two arms which support the coil, and at the stepped portion are formed through-holes whose diameter is gradually reduced from the bottom to top of the stepped portion. The coil and the arms are joined together by filling the stepped portions and through-holes with a holding member made up of resin. By this configuration, in an actuator used for a disk unit or the like, it is possible to completely secure a coil on a carriage while reducing the unit in thickness.
Claims16
An actuator comprising:
- a pair of yokes opposing each other,
- a magnet fixed to at least one of said yokes,
- a carriage pivotable about a rotary shaft,
- a coil, and
- a holding member made of resin and securing said coil,
- wherein said carriage includes a pair of spaced apart coil fitting arms opposing each other, each of said arms having a stepped portion, the stepped portions of said coil fitting arms facing each other, and each of said coil fitting arms having at least one through-hole extending through the respective stepped portion and to the top of the respective coil fitting arm, said through-hole being sized larger at the bottom than at the top of said stepped portion,
- wherein said holding member is disposed between said coil fitting arms, and extends into each through-hole to secure said holding member to said carriage,
- wherein the holding member is configured so that the bottom of the stepped portion is substantially flush with the bottom of the holding member, and
- wherein said stepped portion is formed at each inner side of a pair of coil fitting arms that support said coil, and said stepped portion and each through-hole are filled with the resin forming said holding member.
An actuator comprising:
- a pair of yokes opposing each other,
- a magnet fixed to at least one of said yokes,
- a carriage pivotable about a rotary shaft,
- a coil, and
- a holding member formed of a resin-filled block securing said coil,
- wherein said carriage includes a pair of spaced apart coil fitting arms opposing each other, each of said arms having a stepped portion, the stepped portions of said coil fitting arms facing each other and are formed on the same sides of said coil fitting arms, and each of said coil fitting arms having a plurality of through-holes, said through-hole being sized larger at the bottom than at the top of said stepped portion,
- wherein said holding member is disposed between said coil fitting arms, and extends into each through-hole to secure said holding member to said carriage,
- wherein the holding member is configured so that the bottom of the stepped portion is substantially flush with the bottom the holding member,
- wherein said through-holes extend through said stepped portions and to the top of said coil fitting arms,
- wherein a sectional area parallel to the bottom of the through-holes is gradually reduced from the bottom of the through-hole to a specified point and is constant up to the top of the through holes from the stepped point, and
- wherein said stepped portion is formed at each inner side of a pair of coil fitting arms that support said coil, and said stepped portion each through-hole are filled with the resin forming said holding member.
Dependencies are inferred from the claim text.