JPS63171481A - Magnetic head - Google Patents

Abstract

PURPOSE:To improve close contact between a head and a recording medium and to improve a recording and reproducing efficiency by providing a negative pressure means for generating a negative pressure by an air flow in one of sliders for holding a head core therebetween. CONSTITUTION:The negative pressure means 7 for generating the negative pressure by the air flow due to the movement of the recording medium is disposed in the slider 2 of the sliders 2, 4 at both the sides of the magnetic head core for a floppy disk. The negative pressure means 7 is constituted of a groove part 3 to form a tapered shape having a low depth at a front surface side 2c and a high depth in a central part. Accordingly, according to the flow of the air at the time of recording and reproducing, the central part of the groove part is brought into the negative pressure state and a suction force is produced between the head and the recording medium. Therefore, the close contact between the head and the recording medium is improved and the recording and reproducing efficiency can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention is a book related to a magnetic head for recording and reproducing signals using a floppy disk.

[Conventional technology]

FIG. 5 shows a conventional magnetic head of this type.91
In the figure, (!) is a magnetic head core that has a recording/reproducing gap (1C) and a two-horn erasing cap (one) on the contact surface side that contacts the recording medium (not shown), and the construction that constitutes the recording/reproducing head. Core (1a) and shaped core (1b)
and a cutting core (1d) and a cutting core (1e) constituting an erasing head.
When a recording/reproducing gap (1C) is formed with b), an erasing gap (1f) is formed between the shaped core (1d) and the shaped core (1e), and the shaped core (11) ) and the shaped core (1) are interposed with a spacer such as glass for preventing magnetic interference and for bonding. (2) is a contact surface on the same plane as the contact surface of the magnetic head core (1). The contact surface (2a) has a surface (2a) and is joined to an end portion of one side surface of the magnetic head core (1) on the contact surface side, has an outwardly extending surface (2b) substantially parallel to the magnetic head core (1), and has a contact surface (2a). a first slider made of a non-magnetic material such as ceramic, on which a groove +3 is formed substantially parallel to the magnetic head core (11 (in the same direction as the traveling direction));
has a contact surface (4a) on the same plane as the contact surface of the magnetic head core (1), and is joined to the other end of the magnetic head core (1) on the side of the contact surface;
This is a second slider made of a non-magnetic material such as ceramic and having an outer 911 surface substantially parallel to the magnetic head core (1).

When recording on a recording medium using a magnetic head configured in this way, a! The recording medium is moved so that the magnetic head contacts the recording medium and the write/read head side faces forward, and the information signal to be recorded is applied to the write/read coil, and a magnetic field corresponding to this information signal is applied to the write/read coil. / Appears in the read/write gap (1C) of the read head and records on the recording medium.

A predetermined current is passed through the erase coil, and redundant information written on the recording medium is erased by a magnetic field generated in the erase gap (1f) of the erase head.

Also, during playback, no current is passed through the erase coil, so it does not affect the recording medium.

The information recorded on the recording medium is recorded in the recording/reproduction gap (1C
), this appears as a change in the magnetic field, and a current appears in the write/read coil accordingly, allowing information to be read.

[Problem that the invention seeks to solve]

In the magnetic head configured in this way, the recording medium (5
) is the ideal contact state as shown in FIG. In the figure, (6) is a gimbal spring that supports the magnetic head and brings the magnetic head into good contact with the recording medium (5).

However, the magnetic head and the recording medium (5) emit light at a relative speed during recording or reproduction, and the air near the surface of the recording medium (powder) also moves in the same direction as the recording medium (5).

The airflow will relatively hit the magnetic head. Moreover, the la magnetic head has first and second sliders (2).
(Blend radius (2f) (4f) (4g) is applied to the corner of d to prevent the recording medium (5) from being scratched, so the airflow caused by the movement of the recording medium (5) will not interfere with the magnetic head. The flow flows between the recording medium (5), and this flow flows into the gimbal.
Due to the pressing force of the spring (6) on the recording medium (5), the magnetic head and recording medium ( 5)
comes into contact with. When the contact state shown in Fig. 4 occurs, the gap between the recording/reproducing gap (1c) and the recording medium (5) becomes large, which significantly reduces the recording/reproducing efficiency and causes a deterioration in the performance of a-air recording. This was a book with problems.

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to obtain a magnetic head that can maintain a good contact state between the magnetic head and a recording medium during recording and reproduction.

[Means for solving problems]

The magnetic head according to the present invention includes a negative pressure means on at least one side of the slider that generates negative pressure by an air groove near the head based on the movement of the recording medium to generate a force that brings the contact surface into contact with the recording medium. It was established.

[Effect]

In this invention, the negative pressure means generates a negative pressure between the magnetic head and the recording medium during recording and reproduction, and acts to increase the adhesion between the contact surface of the magnetic head and the recording medium.

〔Example〕

An embodiment of the present invention will be described below based on FIG. with negative pressure means to generate a force that causes the contact surface (2a) to contact the recording medium.

In this embodiment, the book is formed using the S section (3), and its bottom surface (7a) is the front surface (the depth of the 2nd extension is made shallower) with respect to the traveling direction of the recording medium. It is tapered so that it is deepest in the center.

When recording on a recording medium and reproducing information using a magnetic head configured as described above, operations are performed in the same manner as described in the above-mentioned conventional technique.

Next, the contact state between the magnetic head and the recording medium when recording or reproducing data using this magnetic head will be explained. The airflow in the same direction as the traveling direction near the recording medium (5) generated by the relative speed between the magnetic head and the recording medium during recording or reproduction is caused by the air flow in front of the slider (2) (5) in the flange (7). Page 1 (2
It enters from the C) side and flows out from the rear side (2d). At this time, the air flow is narrow at the inlet and widens toward the outflow direction, creating a negative pressure near the center of the flange (7) between the contact surface of the magnetic head and the recording medium. An attractive force will be exerted on the As a result, the contact surface of the magnetic head and the recording medium have good adhesion, and the recording/reproducing efficiency by the magnetic head is improved.

FIG. 2 shows a second embodiment of the present invention, in which the negative pressure means (71) is connected to the slider (2) (
From the front side (2c) (40) to the opposite side (2s (4e)
) and its side surface (7b) is bent into contact surfaces (2a) (4a) $111, and the slider (
2) It is an L-shaped plate made of metal plates attached to the outer surfaces (2a) and (4b) of (4).

In this second embodiment, as in the embodiment shown in FIG. ), the recording medium and slider +21
(44).Moreover, in this second embodiment, since the L-shaped plate (71) is a metal plate, it serves as a magnetic shield.

3 and 4 show a third embodiment of the present invention, in which the negative pressure means (7) is moved from the front side (2c) to the rear side (work) of the first slider +21. A first through hole (7A) formed from the first through hole (7A) and a second through hole (7B) formed from the first through hole (7A) toward the contact surface (2a).
), and the first through hole is located on the front side (2
c) The opening of gA is narrower than the opening of the rear side (2d) 11.

In this third embodiment as well, as in the embodiment shown in FIG.
7A) from the front side (2c) lllj opening to the rear side (2
d) (flows towards the opening of
Negative pressure is maintained at the part that widens from the opening 11, and air flows into the second through hole (7B), creating a suction force between the recording medium (5) and the slider (2). It turns out.

〔Effect of the invention〕

As described above, this invention applies to at least one of the two sliders that sandwich the magnetic head core.

A negative pressure means is provided that generates negative pressure by the air flow near the head due to the movement of the recording medium, and generates a force that brings the contact surface into contact with the recording medium, thereby improving the adhesion between the contact surface of the magnetic head and the recording medium. That's good.

This has the effect of improving the recording/reproducing efficiency of the magnetic head.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of essential parts showing an embodiment of the present invention. FIG. 2 is a perspective view of a main part showing a second embodiment of the invention, FIGS. 3 and 4 are a perspective view of a main part and a model diagram showing a third embodiment of the invention, and FIG. FIG. 6 is a diagram showing an ideal contact state between the magnetic head and a recording medium, and FIG. 1 is a diagram showing the contact state of the magnetic head of FIG. 5. In the figure, (1) is the magnetic head core, (2) is the first slider, (3) is the flange, i4 is the second slider, and (7) is the magnetic head core.
) is a negative pressure means. In addition, the same symbols in each figure indicate the same or complementary parts.

Claims (5)

[Claims] (1) A magnetic head core having a recording/reproducing gap and an erasing gap on the contact surface side that contacts the recording medium, and two sliders disposed on both sides of the magnetic head core, in which at least one of the sliders On the other hand,
1. A magnetic head comprising a negative pressure means for generating a negative pressure by an air flow near the head due to movement of a recording medium to generate a force for bringing a contact surface into contact with the recording medium. (2) The negative pressure means is characterized in that a groove is formed on the contact surface of the slider in parallel with the magnetic head core and has a shallow depth on the front side with respect to the traveling direction of the recording medium. A magnetic head according to claim 1. (3) The bottom surface of the negative pressure means is inclined from the front side surface which is the front side with respect to the traveling direction of the recording medium of the slider to the opposing surface facing the contact surface, and the side surface is bent toward the contact surface side. 2. The magnetic head according to claim 1, wherein the magnetic head is an L-shaped plate attached to the outer surface of the slider. (4) The negative pressure means includes a first through hole formed from the front surface of the slider, which is the front surface in the direction of movement of the recording medium, to the rear surface, which is the opposite surface; 2. The magnetic head according to claim 1, further comprising a second through hole formed from the top to the contact surface. (5) The magnetic head according to claim 4, wherein the opening on the front side of the first through hole of the negative pressure means is narrower than the opening on the rear side.