JPS62185477U

JPS62185477U -

Info

Publication number: JPS62185477U
Application number: JP7168486U
Authority: JP
Priority date: 1986-05-13
Filing date: 1986-05-13
Publication date: 1987-11-25

Description

[Brief explanation of drawings]

第１図は本考案を適用したリニアアクチエータ
の第１の実施例を示す第８図と同様の断面図、第
２図はその要部を拡大して示す部分拡大図、第３
図は第１図のリニアアクチエータを示す第９図と
同様の断面図、第４図は本考案を適用したリニア
アクチエータの第２の実施例を示す第２図と同様
の要部を拡大して示す部分拡大図、第５図はその
第３の実施例を示す第８図と同様の断面図、第６
図はハードデイスク装置を示す平面図、第７図は
リニアアクチエータを示す斜視図、第８図は第７
図の―線上の断面図、第９図は第７図の―
線上の断面図である。１……ハードデイスク装置、２……シヤーシ、
４，７ａ……回転軸、５……ハードデイスク、６
，２０……リニアアクチエータ、７……回動アー
ム、８……記録再生用ヘツド、１１……内ヨーク
、１３……外ヨーク、１４……ボビン、１５……
ボイスコイル、１７，２１，２２，２３……磁石
。 FIG. 1 is a sectional view similar to FIG. 8 showing a first embodiment of a linear actuator to which the present invention is applied, FIG. 2 is a partially enlarged view showing the main parts thereof, and FIG.
The figure is a sectional view similar to Fig. 9 showing the linear actuator of Fig. 1, and Fig. 4 is an enlarged view of the main parts similar to Fig. 2 showing the second embodiment of the linear actuator to which the present invention is applied. FIG. 5 is a sectional view similar to FIG. 8 showing the third embodiment, and FIG.
The figure is a plan view showing the hard disk device, FIG. 7 is a perspective view showing the linear actuator, and FIG.
Figure 9 is a sectional view on the line of Figure 7.
It is a sectional view on a line. 1... Hard disk device, 2... Chassis,
4, 7a...Rotating axis, 5...Hard disk, 6
, 20... Linear actuator, 7... Rotating arm, 8... Recording and reproducing head, 11... Inner yoke, 13... Outer yoke, 14... Bobbin, 15...
Voice coil, 17, 21, 22, 23... magnet.

Claims

[Scope of Claim for Utility Model Registration] An inner yoke that passes through an air-core voice coil having a rectangular cross section, and an outer yoke disposed opposite to the inner yoke so as to sandwich the voice coil, and a magnet included in the outer yoke. , a linear actuator for a disk device in which a recording/reproducing head is moved by moving the voice coil across the magnetic flux of a magnetic circuit formed by the outer yoke and the inner yoke, The width of the surface of the magnet facing the inner yoke is made larger than the width of the surface facing the outer yoke to increase the number of magnetic fluxes interlinking with the voice coil, so that the current flowing through the voice coil is increased. A linear actuator characterized in that the driving force generated in the voice coil is increased.