JPS62106345U

JPS62106345U -

Info

Publication number: JPS62106345U
Application number: JP19733285U
Authority: JP
Priority date: 1985-12-24
Filing date: 1985-12-24
Publication date: 1987-07-07

Description

[Brief explanation of the drawing]

第１図は本考案の実施例を示す吸着ヨークの裏
面斜視図、第２図は第１図に示す吸着ヨークを有
する磁気デイスクの断面図、第３図は別の実施例
を示す吸着ヨークの裏面斜視図、第４図は第２図
に示す磁気デイスクの平面部分図、第５図は第４
図の裏面図、第６図は従来型磁気デイスクの断面
図、第７図は従来型の吸着ヨークの裏面斜視図、
第８図は第６図に示す磁気デイスクの平面図、第
９図は第８図の裏面図、第１０図は回転駆動体に
装着した状態の磁気デイスクの断面図である。１…吸着ヨーク、１ｂ…ＰＧヨーク、１ｃ，１
ｄ…係合部、２…磁気デイスク、５…センターハ
ブ、６…挿入口、５ａ…係合面、８…回転駆動体
。 FIG. 1 is a rear perspective view of a suction yoke showing an embodiment of the present invention, FIG. 2 is a sectional view of a magnetic disk having the suction yoke shown in FIG. 1, and FIG. 3 is a diagram of another example of the suction yoke. A rear perspective view, FIG. 4 is a partial plan view of the magnetic disk shown in FIG. 2, and FIG.
Figure 6 is a sectional view of a conventional magnetic disk, Figure 7 is a perspective view of the rear side of a conventional adsorption yoke,
8 is a plan view of the magnetic disk shown in FIG. 6, FIG. 9 is a rear view of FIG. 8, and FIG. 10 is a cross-sectional view of the magnetic disk mounted on a rotary drive body. 1...Adsorption yoke, 1b...PG yoke, 1c, 1
d...Engagement part, 2...Magnetic disk, 5...Center hub, 6...Insertion port, 5a...Engagement surface, 8...Rotation drive body.

Claims

[Claims for Utility Model Registration] (1) A center hub made of synthetic resin is arranged at the center of rotation of the disk, and this center hub is connected to a metal suction yoke, and one side of the suction yoke has this suction A PG yoke connected to the yoke is installed upright,
And in a device that transmits rotational force to the magnetic disk side by engaging an engaging portion formed on the inner circumferential surface of the center hub insertion port and an engaging portion of a rotary drive body on the magnetic recording/reproducing device side, The engaging parts are arranged in a row,
A magnetic disk characterized in that the engaging portion is erected on a surface opposite to the PG yoke upright surface, and the engaging portion is exposed on the inner circumferential surface of the center hub. (2) The magnetic disk as set forth in claim (1) of the utility model registration, characterized in that the engaging portion is constituted by a pair of bent portions arranged in a substantially V-shape in plan view. (3) A magnetic disk as set forth in claim (1) of the utility model registration, characterized in that the engaging portion is a bent portion integrally formed in a substantially V-shape in plan view.