JPH01191365A - Device for driving magnetic disk - Google Patents

Abstract

PURPOSE:To equip a stable recording and reproducing characteristic and to obtain a magnetic disk driving device, which can record double faces recording, with simple constitution by specifying a relative position among the three of a disk, a magnetic head supporting body and a magnetic head in advance and arranging the two magnetic disk supporting bodies on both surfaces of the disk facing each other. CONSTITUTION:Magnetic heads 9 are respectively arranged with being faced to a magnetic recording medium 3 in a position, where magnetic head supporting bodies 5a and 5b are not mutually overlapped with the magnetic recording medium 3 between. Air in a recessed part 11 is absorbed-out by the revolution of a disk 3 and the disk 3 is attracted in the inner surface side of the recessed part 11. When the disk is revolved, since the disk can be always attracted in the recessed part, stable recording and reproducing are obtained, and further, double faces recording is possible, the magnetic disk driving device with the simple constitution can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic disk drive device for recording or reproducing information on or from a disk-shaped magnetic recording medium.

[Conventional technology]

Magnetic disk drive devices, which record and reproduce information on disk-shaped magnetic recording media (hereinafter referred to as disks), are now widely used as external storage devices for information processing devices such as computers and word processors. It is used.

An example of this is a magnetic disk drive device using a flexible disk, also called a floppy disk. This type of magnetic disk drive device employs a configuration in which the magnetic disk is pressed against the magnetic head with a predetermined load pressure in order to ensure head contact between the magnetic disk and the magnetic head.

Therefore, in the conventional magnetic disk drive device of this type, it is necessary to press the magnetic disk with a pad or other magnetic head, and the mechanism surrounding the head becomes complicated.

In contrast, a device disclosed in Japanese Utility Model Publication No. 42-17806 has been known as a means for obtaining an appropriate load pressure without requiring a pad or other magnetic head.

This invention is an apparatus for recording and reproducing signals by rotating a thin magnetic disk sheet of at least 50 μm or less at high speed to the extent that it can be held in a flat state by centrifugal force. The head is adjustable in the recess and is characterized by being slightly inclined in the direction opposite to the direction of rotation of the magnetic sheet to accommodate the deformation of the magnetic sheet passing through the recess to which the head is attached. With this configuration, the pressure between the magnetic sheet and the seat base becomes slightly lower than the external air pressure on the upper surface of the magnetic sheet, so the magnetic sheet sinks in the lowered head mounting surface, that is, in the recessed part. The claim is that the contact between the magnetic sheet and the head gap of the magnetic head, which is attached by protruding from the head mounting surface, is stabilized.

[Problem to be solved by the invention]

By the way, in this conventional example, the disk is in a state of being attracted by the recessed portion, and faces the helad gap of the magnetic head in a constant state due to the flexibility of the disk. Therefore, recording/reproduction can be performed while maintaining a constant image quality without particularly regulating the position of the disk relative to the head gap.

However, if such a configuration is applied as is to a disk drive device, various problems will occur.

First, disk cartridges are required to be compatible, and therefore, when loaded into a disk drive, there are variations in the relative positional relationship between the disk and the magnetic head. There is no guarantee that recording/playback will be possible if the device is absorbed by the device. The second reason is that depending on the posture of the disk drive when in use, the relative position of the disk and magnetic head changes slightly due to the influence of gravity, and for the same reason as the first, when the disk is started, recording/playback is possible immediately. There is no guarantee that it will become.

The third problem is that if shock or vibration is applied from the outside during recording/reproduction, the attraction of the disk may be released, making recording/reproduction impossible during that time. In addition, in order to ensure the magnetic head's flat touch, only one side of the disk is used for recording/reproduction, so there is a problem that the storage capacity is small.

This invention was made in view of the above-mentioned technical considerations, and its purpose is to provide stable recording/playback characteristics to magnetic disk drives that do not require compatibility of the disks themselves. The object of the present invention is to provide a magnetic disk drive %Jf with a simple structure and capable of double-sided recording.

[Means to solve the problem]

In order to achieve the above object, the present invention rotates a disk-shaped magnetic recording medium, and records and/or reproduces information through a magnetic head that is protrudingly supported by a magnetic head support within a recess. In the magnetic disk drive device, the magnetic heads are arranged so as to face the magnetic recording medium at positions where the magnetic head supports do not overlap each other with one magnetic recording medium in between.

[Effect]

According to the above means, the relative positions of the disk, the magnetic head support, and the magnetic head are defined in advance, and the two magnetic head supports are arranged facing each other on both sides of the disk. The relative position of the disk with respect to the concave portion of the other magnetic head support is determined by the other magnetic head support, and the disk will not be separated from the disk by a distance beyond which it cannot be attracted by the concave portion. Therefore, when the disk rotates, it is always attracted by the two concave portions, and recording/reproduction will never become impossible. Also, it naturally becomes possible to record on both sides, doubling the storage capacity per disc.

〔Example〕

Hereinafter, an example of implementation of the present invention will be described based on the drawings.

The figures are all for explaining the present invention in detail. Figure 1 is a partial cross-sectional explanatory diagram showing the internal structure of a magnetic disk drive, and Figure 2 is a plan view of a magnetic head support supporting a magnetic head. 3 and 3 are explanatory diagrams showing the state in which the magnetic head support attracts the disk, and FIGS. 4 and 5 are explanatory diagrams showing the arrangement of the magnetic head support and the disk, respectively.

In FIG. 1, a magnetic disk drive 1 has a case 2.
It supports a single disk 3 housed in a case 2, a direct drive motor (hereinafter referred to as a DD motor) 4 that rotationally drives this magnetic disk 3, and a support plate 5 as a magnetic head support. It is mainly composed of an arm 6 and a stepping motor 7 that swingably supports the arm 6 and moves the support plate 5 in the radial direction of the disk 3.

The disk 3 has a diameter of 2 inches, and the width direction dimension of the case 2 is formed to be slightly larger than the diameter of the disk 3. In FIG.
It is mounted coaxially with the rotating shaft of the motor 4.This DD
A stepping motor 7 is disposed adjacent to the motor 4, and a rotating shaft 8 of the stepping motor 70 extends to a position where it does not come into contact with the disk 3.

The support plate 5 supporting the magnetic head 9 is shown in FIGS.
As shown in the figure, it is formed into a disk shape and has an annular protrusion 10 on its peripheral edge, and a recess 11 is formed inside the protrusion 10. In this example, the outer diameter of the support plate 5 is 7 m.
m, the inner diameter of the recessed part 11 is 6 mm, and the depth of the recessed part 11 is 1
It is set to 100u. The magnetic head 9 has a concave portion 1
The support plate 5 is inserted into the magnetic head mounting hole 12 protruding from the center of the support plate 5.
It is inserted from the opposite side where the concave portion is formed, and is fixed at a predetermined height, for example, in a state where it protrudes further by about 5 μm from the upper end surface of the protrusion 10. The amount of protrusion is appropriately selected depending on the area of the recessed portion 11, the circumferential speed of the disk 3, the degree of flexibility of the disk 3, and the like.

The arm 6 is formed into a V-shape in plan view, and the apex of the 7-shape is fixed to the stepping motor 70 rotating shaft 8, and the gap 13 of the magnetic head 9 is connected to the disk 3 from the bottom side of the disk 3 at the other end. A support plate 5a facing to the top and a support plate 5b facing from the top side are respectively attached. The angle θ of the V-shape of the arm 6 is set so that when one support plate 5a reaches the outermost position of the data area of the disk 3, the other support plate 5b comes to the innermost position of the data area of the disk 3. has been done. In addition, support plates 5a, 5
Conductive wires are led by an FPC 15 from the magnetic head 9 shown in FIG. There is a conductor extending out to connect to. As shown in FIG. 4, the supporting plates 5a and 5b facing each other may be disposed close to each other at a distance of, for example, 50 μm, such that the upper end surface of the protrusion 10 does not come into contact with the disk 3 when the disk 3 is not rotating. desirable.

The magnetic disk drive device 1 configured as described above is intended to be able to handle itself as one unit, and when in use, the external terminal is connected to the external terminal of, for example, a laptop computer. Used by connecting to a terminal. In this case, DD motor 4
Since the disk 3 does not rotate when the switch is OFF, the disk 3 is separated from the support plates 5a, 5b and the magnetic head 9, as shown in FIG. However, when the switch of the DD motor 4 is turned on, the disk 3 begins to rotate along the upper end surface of the protrusion 10, and as shown in FIG. The pressure inside the disk 11 is lower than that of the outside air, and the disk 3 is attracted to the inner surface of the concave portion 11. As a result, as shown in FIG. 3, the disk 3 is deformed along the curvature of the gap 13 forming surface of the magnetic helad 9, and a load pressure is applied due to the tension of the disk 3. Since the load pressure applying conditions are the same for the two support plates 5a and 5b, the recording/reproducing conditions do not change between the front and back sides of the disk 3, and stable recording/reproducing characteristics can be obtained. Then, in this attracted state, the arm 6 is rotated by the stepping motor to move the magnetic head 9 in the radial direction of the disk 3, and recording/reproduction is performed. This arm 6
The maximum swing angle is when the magnetic head 9 reaches the outermost circumference G of the recording area.
It is set at an angle S at which the material is transferred from the center to the innermost circumference U.

By using the concave portion 11 to attract the magnetic disks in this way, even if an external force such as an impact is applied to the magnetic disk drive device during recording/reproduction or when recording/reproduction is started, the positions of the disks 3 can be defined on the sides facing each other. Since the support plate 5 is arranged, the disk 3 will not be separated to the extent that suction is impossible. Note that even if the disk 3 is far enough away that it cannot be sucked, it will be closer to one of the support plates 5 by the distance, and when the disk 3 is sucked by that support plate 5, the position of the disk 3 will be stabilized and the other support plate 5 It will also be attracted immediately.

Therefore, suction becomes impossible and a predetermined load pressure cannot be applied, which does not cause any inconvenience to recording/reproduction.

As described above, according to the above embodiment, (1) the magnetic disks 9 are arranged on both sides of the disk 3, so the storage capacity for one disk 3 is doubled; (2) each of the pair of support plates 5; has a function to prevent the disk 3 from separating excessively from the other support plate 5, so the disk 3 will not become unable to be sucked in the recessed portion 11, and stable recording/reproduction characteristics can be exhibited. 3 is not exposed to the outside like a disk cartridge, so there is no risk of contact from the outside or dust entering, and the service life is long. ■ Load pressure is applied like a conventional double-sided recording type. Since there is no need to prepare a movable member for the magnetic head, the structure can be simplified.

〔Effect of the invention〕

As is clear from the above description, according to the invention configured as above, as long as the disk is rotating, the disk can be constantly attracted into the recess.
It is possible to provide a magnetic disk drive device that can exhibit stable recording/reproducing characteristics, can perform double-sided recording, and has a simple structure.

[Brief explanation of the drawing]

All figures are for detailed explanation of this invention.
The figure is a partially cross-sectional explanatory diagram showing the internal structure of the magnetic disk drive device, Figure 2 is a plan view of the support plate, Figure 3 is an explanatory diagram showing the disk suction state, and Figures 4 and 5 are respectively It is an explanatory view showing arrangement of a support plate and a disk. 1...Magnetic disk drive, 3...
・・・・・・Disk, 5・・・・・・・Support plate,
9...Magnetic head, 10...
... protrusion, 11... recessed part. Figure 1 Figure 2

Claims (1)

[Claims] In a magnetic disk drive device that rotates a disk-shaped magnetic recording medium and records and/or reproduces information via a magnetic head that is protrudingly supported within a recessed portion by a magnetic head support, 1. A magnetic disk drive device characterized in that magnetic heads are disposed facing a magnetic recording medium at positions where the magnetic head supports do not overlap each other with the recording medium in between.