JPH02199661A - Disk loading device - Google Patents

Abstract

PURPOSE:To constitute a device with minimum number of components simply and to attain excellent stability and reliability by providing a hole for magnetic line of force formed while being pierced through a rotor yoke of an arm opposite to a medium attracting magnet. CONSTITUTION:An arm 15 supporting the base of a drive pin 2 fitted to a chucking hole 4 of a hub 7 of a disk medium in a way of rocking in vertical and horizontal directions at a driving magnet 18 and a hole 17 for the magnetic line of force formed while being pierced through the rotor yoke 13 of the arm 15 opposite to a medium attracting magnet 14 are provided on the subject device. Then the magnetic force of the medium attracting magnet 14 given through the hole 17 is provided on the arm 15 to make the driving pin 2 expose from the chucking hole 4 and the arm 15 is attracted by the driving magnet 18 attended with the rotation of the driving pin 2 to move the chucking hole 4 to apply chucking. Thus, stability and reliability are improved without any complicated structure.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disk mounting device for positioning and rotating a disk-shaped storage medium in a rotational drive mechanism.

[Prior Art] FIGS. 9 to 11 are a plan view, a front sectional view, and a bottom view showing the configuration of the main parts of a conventional disk loading device.

In each figure, 1 is a rotating shaft of a flat motor or the like, and 2 is a drive pin for rotationally driving a disk (for example, a 3.5-inch magnetic floppy disk), which is supported so as to be vertically movable. 3 is a magnetic flange which is rotatably fixed to the rotating shaft l, and has a chucking hole 8 into which the rotating shaft l is loosely fitted. A leaf spring 6 is attached to the bottom of the magnet flange 3 by a leaf spring caulking pin 5.
One end is fixed, the other end is free and the drive pin 2 is fixed.

A magnetic disk is attached to the upper surface of the magnet flange 3. This magnetic disk includes a metal hub 7, a flexible magnetic disk (not shown) supported by the hub 7,
It consists of a heart case (not shown) that rotatably accommodates a flexible magnetic disk with the hub 7 exposed. The hub 7 is provided with a positioning hole 4 into which the drive pin 2 can be inserted. Note that 9 is a medium sliding tape.

In the above configuration, the magnetic disk is placed on the magnetic flange 3 from above, the hub 7 is attracted by the magnet of the magnetic flange 3, and its center hole 8 is fitted into the rotating shaft l. In this state, the drive pin 2 is not inserted into the positioning hole 4 of the hub 7 in most cases, and the tip of the drive pin 2 presses the hub 7.

When the motor rotates in this state, the drive pin 2 rotates together with the rotating shaft 1 (at this time, the hub 7 does not rotate).

As the drive pin 2 rotates, the drive pin 2 fits into the positioning hole 4 of the hub 7. From now on, rotation axis 1
While the disk is rotating, the magnetic disk rotates together with the eight.

[Problem to be solved by the invention] In the conventional disk mounting device as described above, an elastic member such as a leaf spring is used to apply positioning force and return force to the magnetic disk, so the structure is complicated. There is a problem with the number of parts increasing.

The present invention was made to solve this problem, and an object of the present invention is to provide a disk mounting device that can reduce the number of parts and simplify the configuration.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention includes swinging the base of a drive pin that is fitted into a chucking hole of a hub of a disk medium vertically and horizontally on the drive magnet side. A movably supported arm and a magnetic force passing hole formed by penetrating the rotor yoke at a portion where the arm faces the medium attraction magnet are provided.

Furthermore, in order to improve the stability and reliability of chucking, a skirt portion may be provided at the mounting portion of the arm for the drive pin, facing the drive magnet.

[Operation] According to the above means, the magnetic force of the medium attracting magnet applied through the magnetic force through hole is applied to the arm to expose the drive pin from the chucking hole, and the arm is driven as the drive pin rotates. The chucking hole moves and chucking is performed by the magnet. Therefore, without complicating the configuration,
Stability and reliability can be improved.

[Embodiment] Fig. 1 is an exploded perspective view showing the main structure of an embodiment of the present invention, and Figs. 2 to 4 are a plan view, a front sectional view, and a bottom view showing a state in which a magnetic disk is chucked. . Moreover, FIG. 5 is an exploded perspective view showing the detailed structure of the rotor yoke. Note that the same reference numerals are used for the same parts as shown in FIGS. 9 to 11, and redundant explanation will be omitted below.

As shown in FIG. 1, a bearing 11 is fixedly mounted at the center of a base 10, and a plurality of coils 12 are radially mounted on the base 10 so as to surround this bearing 11. A rotary shaft 1 is rotatably supported on the bearing 11, and a rotor yoke 13 is attached to the rotary shaft 1. Furthermore, a medium attraction magnet 14 is mounted on the rotor yoke 13 to attract the hub 7 of the disk with magnetic attraction force. is installed.

Holes 19a and 19b are provided through the medium suction magnet 14 and the rotor yoke 13, into which the drive pin 2 is loosely fitted. .

The drive pin 2 is fixed to one end of a drive pin arm 15 attached to the bottom surface of the rotor yoke 13, as shown in Section 4 and Figure $5. The other end of the drive pin arm 15 is caulked into a caulking hole 16a with a predetermined clearance by a caulking shaft 16. The drive arm 15 is
A return force A is applied by the magnetic force from the magnetic force through hole 17 of the medium attraction magnet 14 of the rotor yaw 13.

Further, an annular drive magnet 18 having a predetermined array of north and south poles is attached to the surface of the rotor yoke 13 facing the coil 12, and forms a motor with the coil 12. The magnetic force of the driving magnet 18 generates a positioning force B as shown in FIG. 4, and this force causes the magnetic disk to be centered.

Next, the operation of the embodiment with the above configuration will be explained.

When the magnetic disk is attached to the rope, the center hole 8 of the hub 7 fits into the rotating shaft l.

When each coil 12 is energized with a predetermined phase in this state, a rotational torque is generated between the coils 12 and the drive magnet 18 that generates a rotational force in the rotor yoke 13. This rotational torque causes the rotor yoke 13 to rotate, and the drive pin 2 together with the rotating shaft l to rotate.

For example, if the drive pin 2 starts rotating in the direction of the arrow from position 2a in FIG. The pin 2 fits into the chucking hole 4 and is exposed from the chucking hole 4. As the drive pin 2 continues to rotate, it acts to push out the side 4a of the chucking hole 4 in the radial direction by the bossing force B shown in FIG. After one more rotation,
The drive pin 2 contacts the side 4b of the chucking hole 4. At this time, the two sides 8a and 8b of the center hole 8 are pressed against the rotating shaft 1, and chucking is completed.

FIGS. 7 and 8 are a front sectional view and a bottom view showing another embodiment of the present invention.

This embodiment differs from the previous embodiment in that a drive pin 20 having a skirt portion 21 is provided at a position facing the drive magnet 18.

In this case, the length of the skirt portion 21 and the drive pin 20
The positioning force B can be set by the distance fan from the drive pin 20, and the return force A can be set by the opening 22 provided in the drive pin 20. By adopting such a configuration, the stability and reliability of chucking can be improved.

[Effects of the Invention] Since the present invention is configured as described above, it produces the following effects.

In the disk mounting device of claim (1), the arm supports the base of the drive pin fitted into the chucking hole of the hub of the disk medium so as to be able to swing vertically and horizontally on the side of the drive magnet; Since a magnetic force passing hole is provided through the rotor yoke in the portion facing the attraction magnet, it can be constructed easily and with the lowest number of parts, and a disk mounting device with excellent stability and reliability can be achieved. can be provided.

In the disk mounting device of claim (2), since the skirt portion is provided in the mounting portion of the arm to face the driving magnet, the stability and reliability of chucking can be further improved. .

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing the main structure of an embodiment of the present invention, FIGS. 2 to 4 are a plan view, front sectional view, and bottom view showing a state in which a magnetic disk is chucked, and FIG. 5 is a rotor yoke. 6 is a bottom view illustrating the chucking operation of the embodiment of the present invention, and FIGS. 7 and 8 are front sectional views and bottom views illustrating other embodiments of the present invention. 9 to 11 are a plan view, a front sectional view, and a bottom view showing the configuration of the main parts of a conventional disk loading device. In the figure. Rotating shaft drive pin chucking hole hub coil 13: rotor yoke 14: medium attraction magnet 15.20: drive pin arm 16: caulking shaft 17: magnetic force through hole 18: drive magnet 21 varnish force-to part 22: opening

Claims (2)

[Claims] (1) A disk rotation drive source is a motor consisting of a fixedly installed coil, a drive magnet rotatably disposed opposite to the coil, and a rotating shaft provided at the center of the drive magnet, and the drive magnet In a disk mounting device equipped with a medium attraction magnet that is installed on a rotor yoke equipped with a rotor yoke and magnetically attracts a hub of a disk medium, the base of a drive pin that is inserted into a chucking hole of the hub is attached to the drive magnet side vertically, horizontally, and horizontally. 1. A disk mounting device comprising: an arm that is supported so as to be swingable in a direction; and a magnetic force passing hole formed through the rotor yoke in a portion of the arm that faces the medium attraction magnet. (2) The disk mounting device according to claim 1, characterized in that a skirt portion is provided at a mounting portion of the arm for the drive pin so as to face the drive magnet.