JPS6318573A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To attain a constantly stable contact state by holding a pair of magnetic heads between upper and lower surfaces with respect to a medium under a prescribed contact pressure. CONSTITUTION:Slider pads 11, 12 slidably contacting a flexible disk recording medium (floppy disk) 16 and the pair of magnetic heads 7, 8 provided with magnetic head chips 9, 10 with a prescribed interval spaced from the slider pads 11, 12 are disposed so as to be held from the upper and the lower surfaces of the floppy disk 6. Thereby, the curvature of the floppy disk or the dislocation in the relative relation position of the floppy disk and the magnetic head is corrected in the slider pad parts 11, 12 and it does not directly affect an influence on the contact state between the magnetic head chips 9, 10 and the floppy disk 6 but the constantly stable contact state can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a flexible disc-shaped recording medium (floppy disk).
The present invention relates to a magnetic recording and reproducing device using.

2. Description of the Related Art Conventionally, there is a method shown in FIG. 6 as a means for magnetically recording and reproducing information on both sides of a 70 disk. That is, a pair of helad sliders 2 and 3 are arranged at positions facing each other with a predetermined contact force so as to sandwich the floppy disk 1 from both sides, and each helad slider 2,
Magnetic head sections 4 and 6 embedded in the floppy disk 3 contact the floppy disk 1 with a predetermined surface pressure to perform magnetic recording and reproduction. The head sliders 2 and 3 are made of ceramics and enclose magnetic head parts 4 and 6 made of ferrite, and the surfaces that come into contact with the floppy disk 1 are polished smooth.

In the above-described magnetic recording and reproducing, the magnetic head section 4
, 5 and the magnetic recording medium greatly influences the characteristics of magnetic recording and reproduction.

Problems to be Solved by the Invention In the above conventional configuration, for example, the floppy disk 1
If the flatness of the
During this period, the deformation of the floppy disk 1 is not sufficiently corrected, and the floppy disk 1 is not welded to the magnetic head portion 4.6, making it impossible to perform good recording and reproduction.

Furthermore, since the hard head sliders 2 and 3 are opposed to each other via the 70 mm disk 1, the vibration resistance is also poor.

These problems become more noticeable when the recording density is increased. In other words, the higher the recording density, the more
At the contact area between the floppy disk 1 and the floppy disk 1, it is required to stably maintain a smaller gap, thereby improving the flatness of the floppy disk 1 and changing the relative position between the floppy disk 1 and the magnetic head section 4°6. In order to improve accuracy, it is necessary to increase the pressing force of the head sliders 2 and 3, but this increases the cost involved in manufacturing the device, and in fact, it becomes impossible to obtain the reproducing force that enables magnetic recording and reproducing. There were problems such as problems such as deterioration of the durability of the floppy disk or the head.

In view of these conventional circumstances, the present invention makes it possible to maintain stable contact between the magnetic head and the floppy disk even if the floppy disk is warped or there is a relative positional error between the floppy disk and the magnetic head. Furthermore, since the deformation resistance of the floppy disk is used to press the head against the floppy disk, it is possible to provide a double-sided magnetic recording and reproducing device that has excellent vibration resistance and is capable of high-density recording and reproducing. purpose.

Means for Solving the Problems In order to achieve this object, the magnetic recording and reproducing apparatus of the present invention has a pair of magnetic head bodies as described above for a disk-shaped magnetic recording medium that is rotationally driven around a drive shaft. A device that records and reproduces information by holding a medium under a predetermined contact pressure on both sides of the medium, or by holding a pair of magnetic heads at a predetermined relative position in the vertical direction with respect to the medium. The magnetic head body includes a magnetic head chip and a slider pad arranged at a predetermined distance from the magnetic head chip.

Function: By using the magnetic head constructed as described above, warpage of the floppy disk or misalignment of the relative position between the floppy disk and the magnetic head (particularly relative misalignment in the direction perpendicular to the surface of the floppy disk) can be prevented. This is corrected by the slider pad portion, and does not directly affect the contact state between the magnetic head chip and the floppy disk, making it possible to always achieve a stable contact state.

At this time, the contact pressure between the magnetic head chip and the floppy disk is determined by the vertical relative position of the pair of magnetic head bodies and the distance between the magnetic head chip and the slider pad. By setting the vertical relative position of the head body or the distance between the magnetic head chip and the slider pad to appropriate values, it is possible to obtain good magnetic recording and reproducing characteristics, making it possible to achieve high-density recording and reproducing, which was previously difficult. This is what makes it possible. Moreover, since the deformation resistance of the floppy disk is used as flJ and the head is pressed against the floppy disk, it has excellent vibration resistance and durability.

EXAMPLES Hereinafter, preferred examples for carrying out the present invention will be described with reference to the drawings.

FIG. 1 shows the state of contact between a pair of magnetic head bodies and a floppy disk in one embodiment of the present invention.

Reference numeral 6 denotes a rotationally driven floppy disk, the upper and lower surfaces of which are coated with a magnetic material of γ-Fe2O3 together with a resin binder. Completed.

Reference numeral 8 designates a pair of magnetic head bodies, each of which is composed of magnetic head chips 9 and 10 and slider pads 11 and 12. The slider pads 11 and 12 are made of barium titanate, which has excellent wear resistance, and their surfaces are polished smooth so that the floppy disk will not be scratched by sliding contact with the floppy disk. These slider pads 11 and 12 are connected to the magnetic head chip 9.
and 10 at predetermined intervals.

The pair of magnetic head bodies 7 and 8 configured in this manner are arranged so as to sandwich the floppy disk 6 from both the upper and lower surfaces with a predetermined pressure.
The same means as in conventional double-sided recording floppy disk devices (
For example, in Japanese Patent Application No. 57-44255, it is mounted on a recording/reproducing device, or it is mounted with a pair of magnetic heads held at a predetermined relative position in the vertical direction with respect to the medium.

The contact pressure between the magnetic head chips 9 and 1° that perform magnetic recording and reproduction and the floppy disk surface is obtained as the deformation resistance when the magnetic head chips 9 and 10 are pushed into the floppy disk 6 by a dimension δ. In other words, since the contact pressure is almost determined only by the deformation resistance and protrusion amount δ of the floppy disk 6, as long as the dimension δ is accurately controlled, it will not be affected by external factors such as the above-mentioned warpage of the floppy disk 6. It is possible to achieve a stable contact state without any friction, and it becomes possible to perform high-density magnetic recording and reproducing, which was previously difficult.

FIG. 2 is a perspective view of the magnetic head body shown in FIG. 1, showing the outline of the shape of the reed and slider pad 12. FIG.

Further, FIG. 3 shows another embodiment of the present invention. It has a slider pad surface 14 surrounding the magnetic head, and a magnetic head chip 13 is provided inside the slider pad.

In the magnetic recording/reproducing apparatus, a combination of magnetic heads 15 having the same shape as the illustrated magnetic head 15 is arranged so as to sandwich both sides of the front disk as shown in FIG.

In this embodiment, a nonwoven fabric 16 is provided on the slider pad surface 14.
is attached to the floppy disk 6 to alleviate sliding friction between the floppy disk 6 and the slider pad. In this case, there is no need to use ceramics that are difficult to process, such as barium titanate, for the slider pad main body.

FIG. 4 shows still another embodiment of the present invention in which slider pads 22 and 23 are arranged.

As described above, in the embodiments of the present invention shown in FIGS. 1 to 4, the slider pad is arranged in the radial direction of the floppy disk at a predetermined distance from the head chip. The location is not limited to the radial direction.

Effects of the Invention As detailed above, according to the present invention, there is provided a slider pad that makes sliding contact with a flexible disc-shaped recording medium (70 disc), and a magnetic head chip that is spaced apart from the slider pad by a predetermined distance. By arranging a pair of magnetic head bodies sandwiched between the upper and lower surfaces of the floppy disk, warping of the floppy disk or misalignment of the relative position between the floppy disk and the magnetic head body (particularly in the direction perpendicular to the surface of the floppy disk) can be prevented. The relative positional deviation of
A stable contact state can always be achieved.

At this time, the contact pressure between the magnetic head chip and the floppy disk is determined by the vertical relative position of the pair of magnetic head bodies and the distance between the magnetic head chip and the slider pad. By setting the vertical relative position of the head body or the distance between the magnetic head chip and the slider pad to appropriate values, it is possible to obtain good magnetic recording and reproducing characteristics, making it possible to achieve high-density recording and reproducing, which was previously difficult. This is what makes it possible. Moreover.

Since the head is pressed against the floppy disk by utilizing the deformation resistance of the floppy disk, it has excellent vibration resistance and durability.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing the mutual relationship between the head and the 70-tube disk of a magnetic recording/reproducing device in one embodiment of the present invention;
2 is a perspective view of the magnetic head body in FIG. 1, FIG. 3 is a perspective view of a magnetic head body in another embodiment of the present invention,
FIG. 4 is a side view showing the mutual relationship between the head and the floppy disk of a magnetic recording/reproducing apparatus according to another embodiment of the present invention, and FIG. 5 is a sectional view of a conventional magnetic recording/reproducing apparatus. 6...Disc-shaped magnetic recording medium, 7.8.15,1
8゜19・・・Magnetic head book, 9, 10.13,
20゜21・・・Magnetic head chip, 11.12
, 14°22.23...Slider pad. Name of agent: Patent attorney Toshio Nakao and 1 other person6~
m*Koen X story horrifying tragedy 78- Laki 1 salary 22.2j-, slider ゛)X- is in Figure 5

Claims (1)

[Claims] A pair of magnetic head bodies are placed under a predetermined contact pressure or at a predetermined relative position with respect to a disk-shaped magnetic recording medium that is rotationally driven around a drive shaft from above and below the disk-shaped magnetic recording medium. A device for recording and reproducing information by holding and holding the magnetic head body, wherein the magnetic head body includes a magnetic head chip and a slider pad arranged at a predetermined interval from the magnetic head chip. and a magnetic recording/reproducing device, wherein the slider pads are arranged vertically shifted from each other by a predetermined distance.