JP2598266Y2 - Disk driver - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk driver having a disk holder for rotating a disk such as a magnetic disk while holding the disk.

[0002]

2. Description of the Related Art An example of this type of disk driver is shown in FIG.
This will be described with reference to FIG. In FIG. 2, the disk holder 1
0 is the axis that becomes the motor axis by the plastic magnet 1
1 and are integrally formed by insert molding. One end of the lower surface of the disk holder 10 is rotatably supported on the disk holder 10 by a support pin 14 and is urged outward from the center of the disk holder 10 by a rod-shaped spring 13. A support member 12 is mounted. At the free end of the support member 12, a driving roller 15 is
6 so as to be rotatable, and
Is provided so as to protrude upward from the opening 10a provided in the first hole. Reference numeral 17 denotes a circular Teflon tape for improving slippage with a metal disk hub mounted on a disk (not shown), and is mounted on the circular protrusion 10b of the disk holding base 10. Since the tip of the rod-shaped spring 13 is engaged with one end of the support member 12, the rod-shaped spring 13 not only urges the support member 12 to rotate in the radial direction of the disk holding table 10, but also The support member 12 is urged upward by being bent upward at -1.

[0003]

[Problems to be Solved by the Invention] By the way, the support pin 1
Numeral 4 supports the support member 12 so as to be rotatable in directions indicated by arrows A and B in FIG. 3 and to be displaceable also in the axial direction of the support pin 14, that is, in the vertical direction. For such pivotal support, a hole 12-1 larger than the outer diameter of the support pin 14 is provided in the pivoted support portion of the support member 12. For this reason, a gap shown by oblique lines is generated between the support pin 14 and the edge of the hole 12-1. This means that the support pin 14 and the hole 12-1 come into contact at one point, and this one point changes variously by the force acting on the support member 12, so that the positioning of the support member 12 is fixed at one point. There is a problem that there is no.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a disk driver having a pivot structure in which a hole of a support member and a support pin come into contact with each other at two points and the positioning of the support member is determined at one point. To provide.

[0005]

According to the present invention, there is provided a disk holding table for holding a disk having a disk hub which is formed of metal and has a driving hole in which a driving roller is to be inserted at an eccentric position from the center. Wherein the disk holding table has an opening at a position separated from the center thereof, and a support member for holding the drive roller so as to protrude from the opening on the lower surface side. The support member is vertically and rotatably supported by a support pin attached to the disk holding table, and the shape of the hole for inserting the support pin in the support member is changed to the disk shape. With respect to a line connecting the center of the holding table and the center of the support pin, the length of the hole is increased in a direction perpendicular to the line segment, and the width of the hole is set to the front side with respect to the rotation direction of the disk holding table. For wherein the slightly larger than the outer diameter of the support pin, and towards the rear side is gradually decreased to be smaller than the outer diameter of the support pin.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. As shown in FIG. 1, the present invention is characterized in that a hole 12-2 for inserting the support pin 14 provided in the support member 12 has a special shape. That is, the shape of the hole 12-2 is adjusted to the center of the disk holding table 10, that is, the center of the shaft 11 and the support pin 1.
4, and the width of the hole 12-2 is slightly larger than the outer diameter of the support pin 14 on the front side with respect to the rotation direction of the disk holder 10 indicated by the arrow in the figure. Enlarge and support pin 1 toward the rear
4 is gradually reduced so as to become smaller than the outer diameter.

[0007] By providing a pivotal structure with such a hole 12-2, as shown in FIG.
When the disk holder 10 starts rotating in the direction indicated by the arrow even when the disk holder 10 does not contact any part of the hole 12-2, the support pins 14 attached to the disk holder 10 are also displaced and the hole 12 2 at the back (in the direction of rotation)
That is, it moves to a narrower width. As a result, FIG.
As shown in (2), the contact is made at two points P1 and P2 where the width of the hole 12-2 and the outer diameter of the support pin 14 match. It is apparent that such two-point contact makes the positioning of the support member 12 more reliable than the conventional one-point contact. In other words, the contact position between the support pin 14 and the rim of the hole 12-2 is two points P1 and P2 regardless of the direction of the external force applied to the support member 12 from any direction. Is fixed to one point.

The pivot structure of the present invention shown in FIG. 1 is not limited to the structure shown in FIG. 2, but is of a type in which a driving roller is supported by a support member which is rotatable with respect to a disk holding table. Applicable to all disk drivers. For example, in the example of FIG. 2, the disk holding table 10 is made of a plastic magnet so as to attract the disk hub and the metal supporting member 12, but a permanent magnet is formed on the plastic disk holding table. Combinations may be used.

[0009]

As described above, according to the present invention, the positioning of the support member can always be determined at the same point by improving the support structure of the support member by the support pin.

[Brief description of the drawings]

FIG. 1 is a diagram showing a main part of an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a configuration of a main part of a disk driver to which the present invention is applied.

FIG. 3 is a view for explaining a pivotal support structure of a support member in a conventional disk driver.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Disc holding base 11 Axis 12 Support member 13 Rod spring 14 Support pin 15 Drive roller

Claims (1)

(57) [Scope of request for utility model registration] 1. A disk driver comprising: a disk holding table for holding a disk having a disk hub formed of metal and having a driving hole into which a driving roller is to be fitted at an eccentric position from a center, The disc holding base has an opening at a position separated from the center thereof, and further, on the lower surface side, is formed by combining a support member for holding the driving roller so as to protrude from the opening,
The support member is vertically and rotatably supported by a support pin attached to the disk holder, and the shape of the hole for inserting the support pin in the support member is set at the center of the disk holder. Along with a line segment connecting the center of the support pin, the width of the hole is slightly larger than the outer diameter of the support pin on the front side with respect to the rotation direction of the disk holding table, and toward the rear side. A disk driver characterized in that the diameter is gradually reduced so as to be smaller than the outer diameter of the support pin.