JPH02105269U

JPH02105269U -

Info

Publication number: JPH02105269U
Application number: JP1293889U
Authority: JP
Priority date: 1989-02-06
Filing date: 1989-02-06
Publication date: 1990-08-21

Description

[Brief explanation of drawings]

第１図は本考案にかかる磁気デイスク駆動装置
の一実施例を示す縦断面図、第２図は同上実施例
の一部を変形した実施例を示す要部の縦断面図、
第３図は本考案にかかる磁気デイスク駆動装置の
別の実施例を示す縦断面図、第４図は同上実施例
の一部を変形した実施例を示す要部の縦断面図、
第５図は第３図の実施例の一部を変形した例を示
す平面図、第６図は同上変形例の縦断面図、第７
図は第３図の実施例にさらに別の変形を加えた例
を示す要部平面図、第８図は本考案のさらに別の
実施例を示す縦断面図、第９図は本考案のさらに
別の実施例を示す縦断面図、第１０図は従来の磁
気デイスク駆動装置の一例を示す縦断面図、第１
１図は従来の磁気デイスク駆動装置の別の例を示
す縦断面図である。１，２１，４１……回転軸、２，２２，４３…
…軸受、４，２４……ロータヨーク、５，２５…
…マグネツト、７，２７……ステータコア、１０
，３０……突極、１１，３１……コイル、１４，
３４……ハブ台、４２……周溝、４４……玉、４
５……外輪。 FIG. 1 is a longitudinal sectional view showing an embodiment of a magnetic disk drive device according to the present invention, and FIG. 2 is a longitudinal sectional view of essential parts showing an embodiment in which a part of the same embodiment is modified.
FIG. 3 is a longitudinal cross-sectional view showing another embodiment of the magnetic disk drive device according to the present invention, and FIG. 4 is a longitudinal cross-sectional view of essential parts showing an embodiment in which a part of the same embodiment is modified.
FIG. 5 is a plan view showing a partially modified example of the embodiment shown in FIG. 3, FIG. 6 is a longitudinal sectional view of the same modification, and FIG.
The figure is a plan view of a main part showing another modification of the embodiment of FIG. 3, FIG. 8 is a vertical sectional view showing still another embodiment of the present invention, and FIG. FIG. 10 is a vertical cross-sectional view showing another embodiment, and FIG. 10 is a vertical cross-sectional view showing an example of a conventional magnetic disk drive device.
FIG. 1 is a longitudinal sectional view showing another example of a conventional magnetic disk drive device. 1, 21, 41... Rotating shaft, 2, 22, 43...
...Bearing, 4, 24...Rotor yoke, 5, 25...
...Magnet, 7, 27...Stator core, 10
, 30... Salient pole, 11, 31... Coil, 14,
34...Hub stand, 42...Peripheral groove, 44...Ball, 4
5... Outer ring.

Claims

[Claims for Utility Model Registration] 1. A substantially cup-shaped rotor yoke having a rotating shaft, a bearing that supports the rotating shaft, a magnet that rotates integrally with the rotating shaft, and a coil wound around the magnet. In a magnetic disk drive device, the magnet is formed in an annular shape and is connected to the rotor yoke. A magnetic disk drive device, wherein salient poles of the stator core are fixed to the outer peripheral surface of the magnet, and salient poles of the stator core are arranged opposite to the outer peripheral surface of the magnet. 2. The magnetic disk drive device according to claim 1, wherein the bearing is a shaft-integrated bearing in which two outer rings are mounted via balls in two circumferential grooves formed apart from each other on the shaft.