JP2554738B2 - Floppy disk drive mechanism - Google Patents

Description

TECHNICAL FIELD The present invention relates to a floppy disk drive mechanism.

2. Description of the Related Art Conventionally, in a floppy disk drive mechanism, as shown in FIGS. 6 and 7, a magnetic hub portion 8 adhered to a disk medium 9 is integrally formed and fixed to a shaft of a molded permanent magnet. 5 is magnetically attracted to the support plate 7
The drive pin 2 fixed to is inserted into the insertion hole 8a provided in the magnetic hub portion 8.

Here, the support plate 7 has an arrow f centered on the metal pillar 10.
Since it is mounted rotatably in the direction of and is pressed by the elastic member 6 in the outer peripheral direction of the disc receiving portion 5, the drive pin 2 fixed to the support plate 7 is also pressed in the outer peripheral direction of the disc receiving portion 5. This acts on the magnetic hub portion 8 to center the disk medium 9.

In such a conventional floppy disk drive mechanism, in order to center the disk medium 9, the drive pin 2
The support plate 7 for fixing the disk is pressed by the elastic member 6 in the outer peripheral direction of the disc receiving portion 5, and the force in the outer peripheral direction of the disc receiving portion 5 which is applied in an arc shape around the column 10 is applied from the support plate 7 to the drive pin 2. By transmitting the force, a force F in the outer peripheral direction is applied from the drive pin 2 to the disk medium 9.

Therefore, since the elastic member 6 is required for centering the disk medium 9, strict material management must be performed to maintain the quality of the elastic member 6, and the elastic member 6 at the time of assembly is required. However, there is a drawback in that the number of man-hours increases due to the mounting of the, and the cost increases.

Further, particularly when the floppy disk drive mechanism is required to be thin, the elastic member 6 must be made thin and thin, which is difficult to manufacture and the elastic member 6 is attached to the disk receiving portion 5. There is a drawback in that the structure for mounting is complicated.

The object of the present invention is to eliminate the above-mentioned drawbacks of the conventional ones, and it is possible to reduce the number of assembling steps, simplify the structure and reduce the cost, and make it possible to correspond to the reduction in thickness. It is an object of the present invention to provide a floppy disk drive mechanism capable of performing the above.

A floppy disk drive mechanism according to the present invention is inserted into a disk receiving portion formed of a permanent magnet for attracting a magnetic hub member of a disk medium by a magnetic attraction force, and an insertion hole provided in the magnetic hub member. A floppy disk drive mechanism including a drive pin for centering the disk medium and a support member for supporting the drive pin, the disk receiving section being formed integrally with an outer peripheral portion of the disk receiving section. A vertical wall surface and a support plate vertical wall surface that is formed integrally with the supporting member so as to face the disk receiving portion vertical wall surface and that is attracted in the outer peripheral direction of the disk receiving portion by the magnetic attraction force of the disk receiving portion vertical wall surface. And having.

Embodiment Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is a plan view seen from the lower side of FIG. 1, and FIG.
FIG. 4 is a partial cross-sectional view taken along the line AA of the drawing in the arrow direction,
The drawing is a partial sectional view taken along the line BB of FIG. 2 in the direction of the arrow, and FIG. 5 is a perspective view of the support plate 3 of FIG.

In these figures, the disk receiving portion 1 is formed by integrally molding a molded permanent magnet on a shaft, and a disk receiving portion vertical wall surface (hereinafter referred to as a vertical wall surface) 1a is provided on the outer periphery, and a support plate 3 is mounted. A pillar 1b is provided at the position.

The drive pin 2 is fixed to the support plate 3, and transmits the rotation of the disc receiving portion 1 rotated by an electric motor (not shown) to a magnetic body hub portion (not shown) to adhere the disc to the magnetic body hub portion. Centering of a medium (not shown) is performed.

The support plate 3 is fitted to the pillar 1b of the disc receiving portion 1 and is attracted to the surface 1c of the disc receiving portion 1 by the magnetic attraction force of the disc receiving portion 1. Wall surface) 3a is provided.

Therefore, when the support plate 3 is attracted to the disc receiving portion 1,
Due to the magnetic forces on the vertical wall surface 1a and the surface 1c of the disk receiving portion 1, magnetic attraction forces f1 and f2 act on the supporting plate 3 (see FIG. 3), and the supporting plate 3 is attracted to the surface 1c of the disk receiving portion 1. At the same time, the vertical wall surface 3a of the support plate 3 is attracted to the vertical wall surface 1b of the disc receiving portion 1.

Further, the support plate 3 is rotatable in the direction of arrow f around the column 1b of the disc receiving portion 1 (see FIG. 2).

The locking screw 4 is provided to prevent the support plate 3 from falling off, and when the disk medium is loaded, the fulcrum 3b of the support plate 3 when the drive pin 2 is pushed downward by the magnetic hub portion. Becomes

That is, a slight gap is provided between the support plate 3 and the head of the retaining screw 4 so as not to prevent the support plate 3 from vertically moving or rotatably operating.
This prevents the support plate 3 from rising extremely (see FIG. 4). In FIG. 4, the broken line indicates the support plate 3
Shows the rising state of.

When the disk medium is mounted and the insertion hole of the magnetic hub passes over the drive pin 2, the support plate 3 causes the magnetic attraction force f1.
The drive pin 2 pushed downward is inserted into the insertion hole of the magnetic hub portion because the drive pin 2 is sucked toward the disk receiving portion 1 side.

At the same time, the support plate 3 is chucked to the disk receiving portion 1 by the magnetic attraction force f1, and the force F0 acts on the drive pin 2 due to the shape of the insertion hole of the magnetic hub portion, so that the support plate 3 rotates about the column 1b. The drive pin 2 tries to move from the center of the disc receiving portion 1 by moving.

However, at this time, the magnetic attraction force f2 by the vertical wall surface 1a of the disk receiving portion 1 acts on the vertical wall surface 3a of the support plate 3, and this magnetic attraction force f2 is transmitted from the support plate 3 to the drive pin 2, The drive pin 2 applies a force F in the outer peripheral direction to the disk medium, and the disk medium is centered.

Thus, the vertical wall surface 3a of the support plate 3 to which the drive pin 2 is fixed is attracted in the outer peripheral direction of the disk receiving portion 1 by the magnetic attraction force f2 of the vertical wall surface 1a of the disk receiving portion 1. The conventional elastic member 6 shown in FIGS. 6 and 7 can be eliminated.

Thereby, it is possible to omit the material management of the elastic member 6 and to avoid the defect induced by the component, so that the quality can be improved.

Further, since the elastic member 6 is not required, the number of steps can be reduced and the structure can be simplified, so that the assembly can be automated and a significant cost reduction can be expected.

Further, since the structure can be simplified, it is possible to support the thinning of the floppy disk drive mechanism.

In the embodiment of the present invention, the vertical wall surface 1a is provided so as to surround the outer circumference of the disc receiving portion 1, but the vertical wall surface 1a may be provided only on the portion of the support plate 3 corresponding to the vertical wall surface 3a. It is not limited to this.

EFFECTS OF THE INVENTION As described above, according to the present invention, the magnetic attraction force of the disc receiving portion causes the support member that supports the drive pin for centering the disc medium to be attracted in the outer peripheral direction of the disc receiving portion. Can reduce the assembly man-hours, simplify the structure, and reduce the cost.
There is an effect that it can be made thinner.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is a plan view seen from the lower side of FIG. 1, and FIG. 3 is a portion in the arrow direction along the line AA of FIG. Sectional view, FIG. 4 is a partial sectional view in the direction of the arrow along the line BB of FIG. 2, FIG. 5 is a perspective view of the support plate of FIG. 2, FIG. 6 is a sectional view of a conventional example, FIG. 7 is a plan view seen from the lower side of FIG. Explanation of symbols of main parts 1 …… Disk receiving part, 1b …… Column 1a …… Vertical wall surface of disk receiving part 2 …… Drive pin, 3 …… Support plate 3a …… Vertical wall surface of support plate 4 …… Latch screw

Claims (1)

(57) [Claims] 1. A disk receiving portion made of a permanent magnet for attracting a magnetic hub member of a disk medium by a magnetic attraction force, and the disk medium inserted into an insertion hole provided in the magnetic hub member. And a drive member for centering the drive pin, and a support member for supporting the drive pin. A floppy disk drive mechanism comprising: a disk receiving portion vertical wall surface integrally formed on an outer peripheral portion of the disk receiving portion; And a support plate vertical wall surface which is formed integrally with the support member so as to face the vertical wall surface of the disc and is attracted in the outer peripheral direction of the disk receiving portion by the magnetic attraction force of the wall surface of the disc receiving portion. Floppy disk drive mechanism.