JPH0467235U

JPH0467235U -

Info

Publication number: JPH0467235U
Application number: JP10786690U
Authority: JP
Priority date: 1990-10-15
Filing date: 1990-10-15
Publication date: 1992-06-15

Description

[Brief explanation of the drawing]

第１図はこの考案による磁気デイスクチヤツキ
ング機構の未チヤツキング時におけるスピンドル
ハブの平面図、第２図はチヤツキング完了時にお
けるチヤツキング機構の平面図、第３図は第２図
の−断面図、第４図はチヤツキング機構の要
部の拡大図、第５図は従来の３．５インチフロツ
ピーデイスクのチヤツキング機構の未チヤツキン
グ時におけるスピンドルハブの平面図、第６図ａ
〜ｃは従来の同チヤツキング機構を構成するスピ
ンドルハブに穿設される駆動ピン突出用開口部の
形状の一例を示す平面図、第７図は従来の同チヤ
ツキング機構のチヤツキング時の平面図を示す。図中符号１は磁気デイスク、２はスピンドル軸
、３はスピンドルハブ、４は板バネ、４ｂは板バ
ネ突部、６は駆動ピン、７は駆動ピン突出用開口
部、７ａ，７ｂは位置規制辺、９はメタルハブ、
１０は中心孔、１１は駆動孔である。 FIG. 1 is a plan view of the spindle hub of the magnetic disk chucking mechanism according to this invention when not being chucked, FIG. 2 is a plan view of the chucking mechanism when chucking is completed, and FIG. 3 is a cross-sectional view taken from FIG. 2. Figure 4 is an enlarged view of the main parts of the chucking mechanism, Figure 5 is a plan view of the spindle hub of the chucking mechanism of a conventional 3.5-inch floppy disk when it is not chucked, and Figure 6a.
~c is a plan view showing an example of the shape of an opening for protruding a drive pin formed in a spindle hub constituting the conventional chucking mechanism, and Fig. 7 is a plan view of the conventional chucking mechanism during chucking. . In the figure, 1 is a magnetic disk, 2 is a spindle shaft, 3 is a spindle hub, 4 is a leaf spring, 4b is a leaf spring protrusion, 6 is a drive pin, 7 is an opening for protruding the drive pin, 7a and 7b are position controls. Side, 9 is metal hub,
10 is a center hole, and 11 is a drive hole.

Claims

[Scope of utility model registration request]

A magnet that attracts the metal hub is provided on the upper surface of a spindle hub for holding a magnetic disk having a metal hub in the center, and a drive pin is provided protruding from a leaf spring provided on the lower surface of the spindle hub,
The drive pin is inserted through a drive pin protrusion opening formed in the spindle hub and inserted into a drive hole formed in the metal hub, and the spindle shaft protruding from the center of the spindle hub is inserted into the metal hub. The spindle shaft and the center hole are brought into contact at two points, the drive pin and the drive hole are brought into contact at two points, and the drive pin is tilted toward the spindle shaft, and the magnetic In a magnetic disk chucking mechanism that completes chucking of the disk and fixes it to the spindle hub, the drive pin protruding opening has a shape that is substantially in contact with the outer periphery of the drive pin at a side opposite to the direction of rotation of the magnetic disk. 1. A magnetic disk chucking mechanism characterized in that the magnetic disk chucking mechanism has a position restricting side, and another position restricting side on the spindle shaft side that comes into contact with the outer periphery of the drive pin only when chucking is completed.