JPS62149067A - Magnetic disc recording and reproducing device - Google Patents

Abstract

PURPOSE:To miniaturize the titled device and to improve the efficiency by providing oppositely a multi-element magnetic head and a magnetic disc pressing body movable in the tracking direction while clipping the magnetic disc to reduce the wear of the head and medium. CONSTITUTION:While clipping the magnetic disc 1, the multi-track head 4 and the magnetic disc pressing body 5 movable in the tracking direction R and exerting the vertical pressing force on the magnetic disc face are provided. The tip of the pressing body 5 is shaped into a spherical shape or an elliptic body having a small radius of curvature in the track width direction and it is desired to be short in the track width of the disc and long in the orthogonal direction for the dynamic stability of the contact with the disc 1. The pressing body 5 is suspended by a gimbals 6 comprising a flexible plate spring to attenuate the vibration and pressed by a compression spring 7. Thus, the wear of the head and medium is less, the device is miniaturized and the efficiency is improved.

Description

[Detailed Description of the Invention] [Field of Industrial Application] Seikan IJJ relates to a magnetic disk recording ILT generation device, and more specifically, FIJJ control of contact between a multi-element magnetic field and a flexible magnetic disk. This relates to a device for

[Prior Art] Conventionally, multi-element magnetic heads, so-called multi-track heads, have been intended to be used for tape-shaped media, as typified by digital audio tapes, but they have also been used in devices where the recording medium is a disk-shaped one. It can be applied.

Particularly in the case of flexible disks, the floating mechanism of the magnetic head is unreliable, so it is thought that it is relatively easy to apply RAD to multi-track disks.

Flexible disk devices include floppy disk drives that serve as external storage devices for computers, and electronic R-still cameras that are expected to be put into practical use in recent years.

Among these, consumer still cameras are required to be smaller and lower in cost than other devices, so the use of 7T for multitrack is very advantageous.

In other words, when using 1 track or 2 trunk heads, the required track pitch + 00 km of precise height is required.
The t' feed mechanism requires a high degree of force IIV accuracy, which not only causes high costs but also limits its miniaturization. On the other hand, the use of multi-track heads/heads eliminates the need for a head feeding mechanism, and in particular, thin-film multi-track heads manufactured using Thin II2 fine processing technology reduce the size of the head and the cost and increase rate. The benefits are great.

However, when converting a head into a multi-track format, the following problems arise. In other words, in magnetic recording, in order to obtain signals with good S/N, the gap between the head and the medium must be kept as small as possible in the submicron range, and wear due to contact between the head and the medium must be minimized. It has to stop.

FIG. 5 shows a sectional view of a contact mechanism between a magnetic disk and a conventional one-track or two-track head in an electronic still camera. Reference numeral 1 denotes a magnetic disk called Hideo Froppy, which travels in the direction shown by arrow X by rotation. 2 is a magnetic head, and 3 is a pad that holds down the disk. In this conventional mechanism, as shown in the figure, the head 2 is pushed in the direction of arrow Y by several hundred microns from the position of the medium water, and a pad 3 fixed to the back surface of the disk 1 is used to connect the head and the medium. It is configured to obtain contact pressure. Note that the head tracking direction is the direction in which the head is superimposed on the paper surface, and pad 3
The grooves are cut in the tracking direction over the entire track.

If this conventional structure is maintained and the one-track or two-track head 2 is replaced with a multi-track head, the contact area between the head and the disk will be the full width of the head in the track direction, and as the contact area increases, the head 2 will increase. It becomes difficult to keep the gap with the disk sufficiently small. That is, it is necessary to optimize the shape of the sliding surface of the base 2, taking into account the shape of the pad, deformation of the disk, etc. Furthermore, damage to the head and medium increases due to the increase in the contact pressure, and furthermore, the lifetime of the head medium deteriorates because all tracks are constantly in contact with each other. More contact pressure.

The increased contact area increases the load on the disk rotation motor and increases power consumption.

[Problems to be Solved by the Invention] The present invention solves the above-mentioned technical problems of the conventional example, and provides a multi-track head with less wear and tear on the head and media, long life, small space, and high efficiency. The purpose of the present invention is to provide a magnetic disk recording/reproducing device using the present invention.

[L stage for solving the problem] In order to achieve such an object, in the main device of the magnetic disk recording 1 of the present invention, the magnetic disk is sandwiched between
A multi-element magnetic head and a magnetic disk presser which is movable in the tracking direction and can apply a pressing force in a direction perpendicular to the surface of the magnetic disk are disposed facing each other.

[Sakukawa] Since the pressure of the pressurizing body brings the magnetic din into contact with the head, ■ the gap between the disk and the head can be minimized (main output increases, ■ This reduces wear on the head and disk, extending their lifespan.■ The power consumption of the disk rotation motor can be reduced.■ A high-precision head tracking mechanism is no longer required, resulting in a significant cost reduction effect.

[Example] The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a cross-sectional view seen from the tracking direction for explaining the contact mechanism between the magnetic head and the medium in the first embodiment of the present invention. Several tens of p-cm from magnetic disk l
A rad 4 is fixed to the multi-tractor 2 at a position a distance of several hundred feet or more.

A pressurizing body 5 is provided on the opposite side of the disk head, and the pressurizing body 5 is pressed in the direction of arrow Z to pressurize the vicinity of the position on the magnetic disk 1 where recording or reproduction is to be performed. The disc 1 and the spatula 4 are brought into contact.

FIG. 2 is a side view, seen from the disk sliding direction, for explaining the configuration of this embodiment. In the figure, 6 is a cymbal that suspends the pressurizing body 5, 7 is a pressure spring that pressurizes the pressurizing body 5 from the back, and 8 is a cymbal that suspends the pressurizing body 5. A pressurizing body arm 9 suspends the gimbal 6 and the pressure spring 7, and supports the pressurizing body arm 8 in the tracking direction of the magnetic disk (arrow R shown in the figure).
10 is a center hub that holds and rotates the magnetic disk 1. For the sake of simplicity, the disk package is not shown. The tip of the pressurizing body 5 is spherical or track-shaped. It is shaped into an ellipsoid with a small diameter of curvature in the width direction.For the pressurizing body 5, it is preferable to use Teflon resin or the like having a small coefficient of friction.
A liner made of non-woven S or the like may be applied to the contact portion with the magnetic disk.The dimension of the pressurizing body 5 in the track direction is made small so that the contact with the disk during pressurization is about several tracks. In addition, the shape of the pressurizing body 5 is desirably short in the track width direction of the disk and long in the direction perpendicular to the track width direction for dynamic stability of contact with the disk.For damping of vibrations, the pressurizing body 5 is O (suspended by a cymbal 6 made of a flexible f!7 temporary spring, and the pressurizing body 5 is pressurized by a pressure spring 7 also made of a thin plate spring. to the conventional 1-track or 2-track.

This can be done in the same way as driving the card. That is, the carriage 9 moves the pressurizing body 5 to a predetermined track by a stepping motor or the like that operates according to a tracking control signal, and the pressure spring 7 is operated by the control zero, so that the pressurizing body 5 presses the disk l. Just do it like this.

According to the mechanism of this embodiment, since several tracks are brought into contact at the same time, the movement of the carriage does not require greater precision than the tracking of the head, making it easier to downsize and lower the cost. Furthermore, compared to the conventional example, a good head touch can be obtained even if both the contact u'jN and the contact pressure are small, so that wear and tear on both the disk and the head is small, and the lifespan can be extended. Further, it is easy to reduce the gap between the head and the disk without depending on the accuracy of the multi-track head. Furthermore, the load on the disk rotation motor is reduced, and the power consumption is reduced by 1°, which greatly contributes to the miniaturization of the device.

FIGS. 3 and 4 show another embodiment of the end 11 with the addition of several pieces.

FIG. 3 is a sectional view seen from the tracking direction to show the contact mechanism between the multi-track head and the flexible disk, and FIG. 4 is a sectional view of the disk l? FIG. The difference from the first embodiment is that a disk support 11 is provided on the multi-track head 4 side of the F4 disk. [Disc supporter] L is provided with four convex portions that support the disk 1 at four locations near the contact area between the head and the disk 7 when the disk L is pressurized by the pressure member 5. .

The disk support 11 is connected to the arm 12. ) is fixed to the carriage 9 and moved to the pressurizing bodies 5 and 6.

The disk 1 is supported near the position where recording or +If recording is performed by venting. Therefore, the support body 11 is 2
It is sufficient to connect two arms 7 having protrusions to the multi-track with the arms 2 fixed to the carriage 9, which are arranged so as to sandwich the rad 4. As for the material of the support body 11, it is preferable to use a material with a low coefficient of friction like the pressurizing body 5, or to apply a liner with a low coefficient of friction to the contact area with the disk.

With such a configuration, it is possible to further reduce the contact area between the head and the medium compared to the first embodiment described above, which has a great effect of suppressing wear on the disk and head and extending their life.

In addition, in the embodiments described so far, the pad is pressurized mechanically, but it may also be electrically controlled using an electro-mechanical transducer f such as a piezoelectric element f- or an octamorph. ”
f lFa. If a plurality of pressurizing bodies are roughly arranged in the track width direction and a mechanism is adopted in which the pressurizing bodies are selected by the pneumatic-mechanical conversion element f described in ``1'', the access time can be significantly shortened.

Furthermore, an access mechanism for the pressurizing body is not required, which greatly contributes to miniaturization of the device. Furthermore, if necessary, a mechanism capable of slightly displacing the multi-track head in the trunk width direction may be submerged to compensate for trunk displacement.

[Effects of the Invention] 1. As explained above, the unreleased 151 can be moved to a multi-track with a magnetic disk in between by placing pressure bodies facing each other and selecting the track position, or by further selecting the track position. By arranging the disk support on the head side, (1) the gap between the disk and the head can be minimized, increasing the raw output by 11g;

■ Reduces head and disk wear and extends lifespan.

(3) Power consumption of the disk rotating motor can be reduced.

(4) A highly accurate head troughing mechanism is not required, which greatly reduces costs.

There is an effect.

[Brief explanation of drawings]

FIG. 1 is a sectional view illustrating a contact mechanism between a magnetic head and a medium according to an embodiment of the present invention. FIG. 2 is a side view of a configuration example of an unreleased embodiment, FIG. 3 is a sectional view illustrating a contact mechanism between a magnetic head and a medium in another embodiment of the present invention, and FIG. FIG. 3 is a side view illustrating a configuration example of the embodiment. FIG. 5 is a sectional view illustrating a contact mechanism between a head and a medium in a conventional magnetic disk recording+1) recording device. ■...Magnetic disk, 2...Magnetic head, 3...Pad. 4... Multi-track head, 5... Pressure body, 6... Gimbal, 7... Pressure spring, 8... Pressure body arm, 9... Carriage, IO... Disk support. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1) A multi-element magnetic head and a magnetic disk pressurizing body that is movable in the tracking direction and capable of applying a pressing force in a perpendicular direction to the surface of the magnetic disk are opposed to each other with a magnetic disk in between. A magnetic disk recording/reproducing device characterized in that: 2) The magnetic disk recording and reproducing apparatus according to claim 1, further comprising a disk support provided on the side of the multi-element magnetic head of the magnetic disk. 3) The magnetic disk recording and reproducing apparatus according to claim 1, wherein the magnetic disk pressurizing bodies are plural and selectively driven by an electro-mechanical conversion element.