JPH03181061A - Magnetic head - Google Patents

Abstract

PURPOSE:To prevent the variance of spacing, to raise the recording density, and to improve the durability by reducing the spread of a medium slide face on the side having a magnetic core up to the magnetic gap in the running direction of a magnetic recording medium. CONSTITUTION:A slider 4 is formed into one body, and the spread of a medium slide face S3 on the side having the magnetic core is reduced up to a recording/ reproducing gap in the medium running speed of an arrow (a). That is, the slider 4 is provided with a cut 4c by which an about half of the medium slide face S3 is eliminated together with a slider groove 4a, and a groove 4b to which a recording and reproducing core 1 will be inserted is formed in this slider 4. Consequently, magnetic gap parts of magnetic cores of medium slide faces of two magnetic heads are satisfactorily brought into contact with the magnetic recording medium, and therefore, the gap satisfactorily follows the medium at the time of the occurrence of oscillation due to bend of the medium during recording/reproducing. Thus, the variance of spacing is prevented, and the recording density is raised, and the durability is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic head, and particularly to a magnetic head that records and reproduces information by sliding the magnetic head on a magnetic recording medium.

[Conventional technology]

Conventionally, as this type of magnetic head, there is a magnetic head for a flexible disk device that records and reproduces information on a flexible disk of a magnetic recording medium used in an external recording device such as a computer.

In recent years, flexible disk drives have rapidly become smaller and larger in capacity, and the magnetic heads used in these flexible disk drives are required to have higher recording densities. Therefore, an effective method is to shorten the wavelength recorded on a magnetic recording medium (hereinafter referred to as "medium").

However, if the recording wavelength is shortened, the amount of gap between the medium and the magnetic head (hereinafter referred to as spacing) cannot be ignored, and even a small change in the amount of spacing will greatly affect the reproduction output of the magnetic head. The contact condition of the two is important, and it is necessary to stabilize and reduce the spacing.

With the above in mind, a conventional magnetic head will be described below with reference to the drawings.

Figure 8 of the drawings is a perspective view of a conventional magnetic head, figure 9 is an exploded perspective view of the magnetic head of figure 8, figure 10 is a perspective view of the magnetic head of figure 8 set, figure 11 is a perspective view of the magnetic head of figure 8. The figure shows the configuration of a conventional magnetic head device and the state of contact between the head and the medium.

First, regarding the conventional magnetic head, FIGS.
This will be explained using figures.

FIGS. 8 to 10 show the configuration of a magnetic head used in the conventional magnetic head device. As shown in FIG. 10 of the drawings, the magnetic head 10 is fixed to an elastic plate 8 (the lower side of the elastic plate 8 is not shown in the figure), and is formed so as to surround the magnetic head fixing portion of the elastic plate 8. φ-sexually swings 1i on the elastic plate 8 through the L-shaped elongated hole 8a.
It is supported by a mechanical system and is composed of the following members.

In FIGS. 8 to 10 of the drawings, reference numeral 1 denotes a recording/L core, which has a recording gap 2 as a magnetic gap on its upper surface in the drawings where it slides on a medium (not shown).

The recording/reproducing core 1 is fixed on an elastic plate 8 while being held between sliders 6.7 that constitute a medium sliding surface.

The slider 6.7 has a block shape with an L-shaped cross section, and the upper surface in the figure is formed into a uniform plane with the upper surface of the core 1.
A groove 7a is formed in a portion of the slider 7 closer to the core 1 side along the medium sliding direction. The upper surface of the slider 6, the core l, and the upper surface of the slider 7 on the left side of the groove 7a in the figure constitutes a first medium sliding surface S1, and the upper surface of the slider 7 on the right side of the groove 7a constitutes a second medium sliding surface S1. Surface S2
It becomes. Note that the groove 7a is formed to improve the contact between the medium sliding surface 51°S2 and the medium.

A coil 5 is wound around the recording/reproducing core 1 through the space of the notch in the L-shaped cross section of each of the sliders 6, 7. Further, a back core 3 is coupled to the core 1 at the lower side of an elastic plate 8 to form a magnetic circuit. Further, the terminal of the coil 5 is connected to a flexible printed circuit board 9 (FIG. 10) for leading out an external circuit.

Next, a magnetic head device using the magnetic head configured as above will be explained using FIG. 11.

FIG. 11 shows the main part configuration of a conventional magnetic head device, and
This shows the state of contact between the head and the medium.

In FIG. 11, a carriage 12 is driven by a driving means (not shown) along the radial direction of the medium 11 (horizontal direction in the drawing). An arm 13 is supported on the carriage 12 so as to be elastically movable in the directions of arrows A and B by a support member (not shown), and is biased in the six directions of arrows by a spring (not shown). ing.

The above-mentioned magnetic head 10° 10 is attached to the upper surface of the tip of the carriage 12 and the lower surface of the tip of the arm 13 by fixing each elastic plate 8.8 to each of the carriage 12 and the arm 13 with adhesive or the like. .

The magnetic heads 10 and 10 are respectively arranged so that the medium sliding surfaces S1 and S2 face each other with the medium 11 in between, and the magnetic heads 10 and 10 are arranged so that the medium sliding surfaces S1 and S2 face each other, and the magnetic heads 10 and 10 are moved as shown in the figure by the pressing force of the spring that biases the arm 13 mentioned above. The medium 11 is pressed against the medium 11 to press the medium 11 against each other.

In addition, the track positions of the magnetic heads 10 and 10,
That is, the reason why the positions of the cores 1.3 are shifted in this way is of course to prevent mutual interference between the cores.

When recording and reproducing under such #I configuration, the medium 11 is rotationally driven by a driving means (not shown), and each recording/reproducing gap 2 of the magnetic head 10.10 is aligned with the medium 1.
1 for recording and playback.

[Problem to be solved by the invention]

As described above, in the conventional example, the magnetic head 10.1
Provision is made to reduce the spacing by means of an elastically movable support arrangement of 0 and elastic pressure.

However, in this conventional configuration, since the opposing medium sliding surfaces 5IS2 of the magnetic heads to and to are both large flat surfaces, the medium 1
Surface contact with 1. For this reason, the deflection in the medium 11 causes undulations and vibrations as it rotates, and the gap 2 (Fig. 10) is the medium! There was a problem in that it was not possible to follow the displacement of the surface of l, and the spacing was likely to fluctuate.

Further, in order to constantly reduce this spacing, there is a method of increasing the pressing force applied to the medium 11 on each of the magnetic heads 10 and 10 via the aforementioned springs (not shown), but this method does not There was a problem that H1 scratches were likely to occur on the L!, which was undesirable because it significantly deteriorated its durability.

This invention was made in order to solve the above-mentioned problems of the conventional example, and the active surface of the medium on the side having the magnetic core is set relative to the running direction of the magnetic recording medium.

The purpose is to effectively suppress passive spacing, increase recording density, and reduce the pressing force of the magnetic head against the medium to improve the durability of the medium. shall be.

[Means for Solving the Problems] Therefore, in the present invention, magnetic recording media are arranged facing each other, have a groove carved in their centers, each have a medium active surface, and cover both the front and back sides of a magnetic recording medium. In two magnetic heads that are sandwiched and slid on the magnetic recording medium to record or reproduce information, the medium active surface on the side having the magnetic core is almost up to the magnetic gap in the running direction of the magnetic recording medium. The purpose is to achieve the above objective 1] by using a magnetic head formed as an inner product of .

[Effect]

In the magnetic head according to the present invention, the medium active surface on the side having the magnetic core is planted so as to extend almost up to the magnetic gap in the running direction of the magnetic recording medium, so that each of the two magnetic heads faces the magnetic recording medium. The magnetic gap portions of the magnetic cores on the media active surface are in good contact. Therefore, when vibrations occur due to deflection of the medium during recording and reproduction, the gap follows the medium well and prevents the occurrence of sagging and fluctuations.

〔Example〕

An embodiment of the present invention will be described below based on the drawings.

FIG. 1 is an exploded perspective view showing the configuration of a magnetic head that is an embodiment of the present invention, with FIG. 1(a) showing the slider portion and FIG. 1(b) showing the core portion. . Second
The figure is an assembled perspective view of this embodiment, FIG. 3 is a 11111 side view showing the structure of the magnetic head unit using this embodiment and the state of contact between the head and the medium, and No. 4rA is another form of this embodiment ( Fig. 4 is an exploded perspective view showing the structure of the magnetic head in Fig. 1), in which Fig. 4A shows the slider portion, and Fig. 4B shows the core portion. FIG. 5 is an assembled perspective view of another form (1) of this embodiment, and FIG. 6 is an assembled perspective view of another form (1) of this embodiment.
2) is a perspective view of the slider, and FIG. 7 is a perspective view of another form (3) of this embodiment.

In the drawings, the same or equivalent components as those in the conventional example are represented by the same reference numerals, and some parts will be explained repeatedly.

First, regarding one embodiment of the present invention, FIGS.
This will be explained using figures.

In FIG. 1 of the drawing, the shape of the medium active surface S3 of the slider 4 (IF diagram (a)) is different from that of the conventional example, and is about half of the medium sliding surface S1 of the conventional example (FIG. 8). A notch 4c is provided, and the recording/reproducing core 1 has a shape in which about half is exposed. Also, the recording and playback core! is back core 3
It has a ring shape (FIG. 1(b)) without a hole (FIG. 9), and its dimensions are also very small compared to the conventional example.

Further, the slider 4 is the same as the slider 6°7 (9th position) of the conventional example.
) is integrally formed, and the area of the medium sliding surface S1 on the side having the magnetic core of the conventional example is set to approximately the area up to the recording/reproducing gap 2 in the medium running direction a, that is, the medium sliding surface S
Notch 4 with about half of the l side removed along with slider 48
The slider 4 is configured to have a shape in which recording (II raw cocoa 1 mediator) is performed. The second [
A magnetic head 5 is constructed on the I/1.

The winding of the coil 5 in FIG. 1(b) is as follows:
22 Insert and fix the +rj raw core l to the media running surface S.
2. It is also possible to process S3 and wind the coil 5.

In this embodiment, as described above, the media running direction a (arrow)
On the other hand, the entrance side of the medium 11 of the slider 4 is removed to the vicinity where the gap 2 is located, but the elastic plate 8 (Fig. 3) and the carriage! 2. Depending on the shape of the arm 13, the medium 11 and the medium sliding surface S2. The spacing between S3 is different, and the removal direction of the slider 4 is also set to the exit side of the medium 11, and as shown in FIG. The removal direction of the slider 4 can be changed and combined as appropriate.

Further, the shape of the recording/reproducing core 1 can be made small enough to allow the coil 5 to be wound a required number of times.

With the above configuration, during recording and reproduction, the medium 11 is rotationally driven by the driving means (not shown), and the magnetic head 1
Each recording/reproducing gap 2 of 5.15 is moved onto the medium 11 for recording and reproduction.

In this case, as described above, the shape of the recording/reproducing core 1 can be made small enough to allow the coil 5 to be wound the required number of times, so the recording/reproducing efficiency of the magnetic head can be sufficiently improved, and the magnetic head and medium Since it is possible to improve the contact state of the magnetic head and prevent spacing loss and fluctuations, a magnetic head with a short recording wavelength, that is, optimal for use in high-density recording, can be obtained.

Next, a magnetic head of another form (1) of this embodiment will be explained using FIGS. 4 and 5. FIG.

As shown in FIGS. 4(b) and 5, the magnetic head of this alternative form (1) has a coil 5 wound around the recording 11i raw core 1 in FIG. 4
In the one inserted and fixed in b, record ilE raw core 1
The rounded surface processing is performed on the medium running surface 1a with the recording/reproducing gap 2 as the apex. t is made to form an arc with respect to the medium running direction a, but it is also desirable to apply a slight rounded surface finish to each part in the track running direction perpendicular to the medium running direction a so as not to damage the medium. After processing the R surface of the medium running surface 1a (FIG. 4(b)), the coil 5 is wound and the slider 4's ? A4B, but at that time, the height (h) of the slider 4 from the medium running surface S3 is increased by about 0 to 500 μm and fixed to form the magnetic head 16.

The other configurations are the same as those in the previous embodiment.

Next, another form (2) of the magnetic head of this embodiment will be explained using FIG. 6.

As shown in FIG. 6 of the drawing, the magnetic head of this alternative form (2) has 4b engraved on the slider 4 extended downward in the height direction in FIG. 6 compared to the embodiment described above. I did it,
For example, the medium sliding surface 1a of the core 1 (FIG. 4(b)) and the medium sliding surface S3 of the slider 4 in the above-mentioned alternative form (1)
The height h of FIG. 5) can be adjusted by a height adjusting means (not shown).

Next, a magnetic head according to another form (3) of this embodiment will be explained with reference to FIG.

As shown in FIG. 7, this alternative form (3) of the magnetic head is one in which a portion 4b provided on the slider 4 is extended in the direction of the arrow a in the medium running direction. The position of the gap 2 of the magnetic head in the embodiment and other embodiments can be adjusted by an adjusting means (not shown).

Any of the magnetic heads of alternative embodiments (1) to (3) described above exhibits the same functions and effects as those of the embodiments described above.

(Effects of the Invention) As described above, the magnetic heads of the present invention are arranged facing each other, have a groove carved in the center of each head, each have a medium sliding surface, and are arranged on the front and back sides of a magnetic recording medium. Holding the inner surface,
Recording or IF of information by moving the magnetic recording medium
In the two magnetic heads that perform recording, the medium movement iI'Ii on the side where the magnetic core is 4F relative to the running direction of the magnetic recording medium is ! 1a' magnetic gap, it is possible to effectively suppress variations in spacing, increase recording density, and reduce the pressing force of the magnetic head against the medium, improving the durability of the medium. This has the effect of helping you move towards the future.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is an exploded perspective view showing the structure of a magnetic head according to an embodiment of the present invention, in which FIG. 1(a) shows a slider portion, and FIG. 1(b) shows a core. Each section is shown below. Second
The figure is an assembled perspective view of this embodiment] Figures 1 and 3 are side views showing the configuration of the main parts of a magnetic head device using this embodiment and the state of contact between the head and the medium, and Figure 4 is an alternative view of this embodiment. FIG. 4(a) is an exploded perspective view showing the configuration of a magnetic head in this embodiment, and FIG. 4(a) shows a slider portion, and FIG. 4(b) shows a core portion. FIG. Alternative form (1)
FIG. 6 is a perspective view of the slider of another form (2) of this embodiment, FIG. 7 is a perspective view of another form (3) of this embodiment, and FIG. 8 is a conventional magnetic head. 9 is an exploded perspective view of the magnetic head shown in FIG. 8, FIG. 10 is a perspective view showing the magnetic head shown in FIG. 8 set, and FIG. 11 shows the main points of a conventional magnetic head device. FIG. 3 is a diagram showing the configuration of the parts and the state of contact between the head and the medium. ! ...Recording/reproducing core 2...Recording/reproducing gap 3...Back core 4...Integrated slider 5--- Coil 6.7 ......Slider 8...Elastic plate 9...Flexible printed board 10.15.1
6...Magnetic head i -...Magnetic recording medium 1 S2゜S 3--------Medium sliding surface a...Medium traveling direction

Claims (1)

[Claims] They are arranged facing each other, have a groove carved in the center of each, each has a medium sliding surface, sandwich both the front and back sides of a magnetic recording medium, and are slid onto the magnetic recording medium to record information or A magnetic head comprising two magnetic heads that perform reproduction, wherein the medium sliding surface on the side having the magnetic core has an area approximately up to the magnetic gap in the running direction of the magnetic recording medium.