JP2600998Y2 - Magnetic disk drive - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk drive for mounting and driving a flexible magnetic disk, and more particularly to an improved structure for mounting a spring for holding a chucking lever.

[0002]

2. Description of the Related Art A magnetic disk drive using a flexible magnetic disk is known as a magnetic storage device of a computer. Among them, in the case of using a 3.5-inch magnetic disk, the bottom view in FIG.
A conventional magnetic disk drive will be described with reference to a sectional view taken along line Y.

In a conventional magnetic disk drive 1, a metal hub 3 is attracted to a magnet 5 on a disk table 4, and the magnetic disk 2 is placed on the magnetic disk drive. A rotating shaft 6 to be mounted, and the rotating shaft 6
Separately, an engagement pin 10 of a chucking lever 9 provided on the lower surface side of the disk table 4 is engaged with a hole 8 provided in the metal hub 3 to be driven to rotate.

As shown in FIG. 1, a chucking lever 9 provided on the lower surface 4b of the conventional disk table 4 has one end held by the support pin 10 on the lower surface 4b of the disk table 4, and the other end. The metal hub 3 of the magnetic disk 2 protruding from the upper surface 4a of the disk table 4;
An engagement pin 11 composed of a roller engaged with the hole 8 is provided.

The chucking lever 9 is constantly pressed and held against the lower surface 4a of the disk table 4 by a spring 12. The spring 12 is the engagement pin 1
1 is wound around a lower end thereof, one end of which is locked by a locking portion 13 provided on the support pin 10 side of the chucking lever 9, and the other end of which is protruded from the outer periphery of the lower end of the rotating shaft 6. Locking claw 1
Therefore, the chucking lever 9 is pressed and held against the mask surface 4b of the disc table 4, and the engaging pin 10 provided on the chucking lever 9 is It is urged outwardly of the circle.

[0006]

However, in the conventional magnetic disk drive 1, the chucking lever 9 of the disk table 4 is held by pressing the lower surface 4b of the disk table 9 by a spring 11. The spring 12 is wound around the lower end of the engaging pin 11, one end of which is locked by a locking portion provided on the support pin 10 side of the chucking lever 9, and the other end is the lower end of the rotating shaft 6. The spring 12 is configured to be locked by the protruding locking claw 14 protruding to the outer periphery. Particularly, since the other end of the spring 12 is configured to be locked to the protruding locking claw 14 protruding to the outer circumference of the lower end of the rotating shaft 6, Only the portion of the protruding locking claw 14 protruding from the outer periphery of the lower end of the rotating shaft 6 becomes thicker, and the thickness of the mounting of the spring 12 has become a major issue when the magnetic disk drive 1 is made thinner.

The present invention has been made in view of the above-mentioned problems, and has as its object to reduce the thickness of a magnetic disk drive.

[0008]

In order to solve the above-mentioned problems, according to the present invention, a metal hub of a magnetic disk is attracted to a magnet on a disk table to mount the magnetic disk, and a shaft is mounted on the metal hub. The rotating shaft and the engaging pin of the chucking lever provided on the lower surface side of the disk table separately from the rotating shaft are engaged with the metal hub and driven to rotate, and the chucking lever is constantly driven by a spring. In a magnetic disk drive device that is pressed against and held on the lower surface side of a disk table, this spring is wound substantially half way around the lower end of the engaging pin, and one end is provided on the support pin side of the chucking lever. The other end
Is formed integrally with the disk table,
An inclined locking piece is formed in the notch hole provided in the cable
It is obtained so as to be locked to the locking portion.

[0009]

In the magnetic disk drive having the above structure,
Since the other end of the spring of the chucking lever is locked to the locking portion formed on the disc table, the need for a protruding locking claw that protrudes from the outer periphery of the lower end of the rotating shaft as in the related art is unnecessary.
As a result, the space required for mounting the spring can be reduced.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a bottom view of a magnetic disk drive according to an embodiment of the present invention, FIG. 2A is a cross-sectional view taken along the line XX of FIG. 1, and FIG. This FIG. 1, FIG.
In the example shown in FIG. 3, the same reference numerals are given to the portions corresponding to the respective portions of the conventional example shown in FIGS.

As shown in the figure, the magnetic disk drive 20 according to the present invention has the same structure as the conventional one,
Desk table 4 on the side of engaging pin 11 near rotating shaft 6
Is different from the conventional one in that a locking portion 24 for locking the other end of the spring 12 is provided.

As shown in FIG. 2 (b), the locking portion 24 is provided with a notch 24a in the desk table 4, and is formed in a substantially L-shape except for a part of the locking piece 24b. The locking piece 24b is formed with an inclined surface 24c that is gradually inclined when the other end of the spring 12 is inserted from the direction of the engaging pin 11.

Accordingly, the spring 12 is wound around the lower end of the engaging pin 11, one end of which is locked by a locking portion 13 provided on the support pin 10 side of the chucking lever 9, and the other end of which is shown in FIG. As shown in the cross-sectional view of (a), the lower surface 4a of the desk table 4 is inserted and locked along the inclined surface 24c of the locking portion 24.
2, the disc table 4 is pressed and held against the lower surface 4a of the disc table 4.

[0014]

According to the magnetic disk drive of the present invention having the above-described structure, the spring for holding the chucking lever against the lower surface of the disk table is provided.
Is wound substantially half-circle around the lower end of the engagement pin, and one end thereof
Is related to the locking part provided on the support pin side of the chucking lever.
And the other end is formed integrally with the disc table
And a notched hole in the disc table.
Is configured to be locked by the locking portion forming the locking piece portion, so that a protruding locking claw that protrudes from the outer periphery of the lower end of the rotating shaft as in the related art is unnecessary, and as a result, it is possible to mount the spring. The required space can be reduced, and the magnetic disk drive can be made thinner.

[Brief description of the drawings]

FIG. 1 is a bottom view of a magnetic disk drive according to the present invention.

FIGS. 2A and 2B show details of FIG. 1, wherein FIG. 2A is a sectional view taken along line XX of FIG. 1, and FIG.

FIG. 3 is a bottom view of a magnetic disk drive according to a conventional example.

FIG. 4 is a sectional view taken along line YY of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 20 Magnetic disk drive 2 Magnetic disk 3 Metal hub 4 Disk table 4a Upper surface 4b Lower surface 5 Magnet 6 Rotating shaft 7 Through hole 8 Hole 9 Chucking lever 10 Support pin 11 Engagement pin 12 Spring 13 Locking part 24 Locking portion 24a Notch hole 24b Locking piece 24c Inclined surface

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G11B 17/022-17/03

Claims (1)

(57) [Scope of request for utility model registration] 1. A metal hub of a magnetic disk is attracted to a magnet on a disk table to mount the magnetic disk, and a rotating shaft mounted on the metal hub and a rotating shaft of the disk table separately from the rotating shaft. An engaging pin of a chucking lever provided on the lower surface side is rotated by being engaged with the metal hub, and the chucking lever is constantly pressed against the lower surface side of the disk table by a spring and held. In the driving device, the spring is wound substantially half way around the lower end of the engaging pin, one end of which is locked by a locking portion provided on the support pin side of the chucking lever, and the other end is formed by a disk table. Integrally formed
And a notched hole in the disc table.
Driving device for a magnetic disk, characterized in that it is locked to the locking portion forming the engaging piece portion of.