JPH0359810A - Composite type magnetic head - Google Patents

Abstract

PURPOSE:To eliminate the need for returning a slider to a standard track when a recording and reproducing action is switched and selected from one side to the other side by setting the spacing in the radial direction of the medium at the center of the track width of the upper slider and the lower slider at the same and standard value. CONSTITUTION:The upper slider 14 and lower slider 14' assembled with a core 12 for a low track density, the same core 12' and a core 11 for a high track density and the same core 11' in one slider are disposed to face each other with the medium 5 in-between. The spacing (c) at the center of the track width of the core 11 and the same core 11' and the central spacing (d) of the core 12 and the same core 12' are the same and the value thereof is set at the standard value. The track position of the slider is, therefore, set in a prescribed position even when the selection of the magnetic recording and reproducing action transfers from the upper slider 14 to the lower slider 14' or verse versa. The need for moving the slider to the standard track is eliminated even if there if a change in the selection of the magnetic recording and reproducing action.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a magnetic head, and particularly to a magnetic head used in a floppy disk device.

(Prior Art) Conventionally, this type of magnetic head has a structure as shown in FIG. 2, in which a high track density core 1 and a low track density core 2 are incorporated into the same slider 3. there was.

Figure 3 shows the slider 4 assembled as shown in Figure 2.
As can be seen from Figure 0, which is a cross-sectional view of the same 4' sandwiched between the upper and lower sides of the medium 5, the high track density core 1 (shaded area) is incorporated into the upper slider 4.
If the distance between the track centers in the radial direction of the medium and the high track density core 1' (shaded area) incorporated in the lower slider 4' is a, then the distance between the upper slider 4 and the lower slider 4' is The track center distances of the incorporated low track density cores 2 and 2' do not match a. Note that the low track density core referred to here is a core with a wide track width, On the other hand, a core for high track density is a core whose track width is narrow.

(Problems to be Solved by the Invention) In the conventional magnetic head described above, the core spacing for high track density and the core spacing for low track density between the upper slider and the Shimonoseki slider are different. For this reason, for example, the spacing of cores for low track density is standard spacing (F D D
If it is 1.5 +u+) for 3.5 inches, the spacing of the cores for high track density will deviate from the standard spacing.
In this case, when the recording and playback function at high track density is selected by switching from the upper slider to the lower slider, the lower slider cannot be positioned on the predetermined track and must return to the reference track (track 0). There were certain drawbacks.

In view of the above-mentioned problems of the conventional composite magnetic head, an object of the present invention is to provide a composite magnetic head that does not need to return to the reference track when the recording and reproducing operations are switched from one side to the other. It is about providing.

(Means for Solving the Problem) The present invention has the following means configuration in order to achieve the above object. That is, the composite magnetic head of the present invention includes an upper slider including a first core for low track density and a second core for high track density that perform magnetic recording and reproduction, and a second core for low track density. In a composite magnetic head in which a lower slider having a No. 3 core and a fourth core for high track density forms a pair with a medium in between, each track of the first and third cores is The composite magnetic head is characterized in that an interval in the radial direction of the medium at the center of the width and an interval in the radial direction of the medium at the center of the track width of each of the second and fourth cores are the same and have standard values.

(Embodiments) Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a longitudinal sectional view of one embodiment of the present invention.

Cores 12 and 12' for low track density and cores 11 and 1 for high track density perform magnetic recording and reproduction on the medium 5.
The upper slider 14 and the lower slider 14', which are assembled into one slider, face each other with the medium 5 in between. Here, the track width center distance C between the high track density cores 11 and 11' in the medium radial direction and the track width center distance d between the low track density cores 12 and 12' are the same, and the value thereof is is also set to the standard value.

By doing the above, the track position of the selected slider is set to a predetermined position even when the selection of the magnetic recording and reproducing function is transferred from the upper slider 14 to the lower slider 14', or vice versa. be done. Therefore, there is no need to return the slider to the reference track (0 track) and reposition the track as in the prior art, and there is an advantage that the information processing speed is not reduced.

(Effects of the Invention) As explained above, in the present invention, the track width center distance between the high track density cores of the upper slider and the lower slider and the track width center distance between the low track density cores are the same. Due to the standard value, there is no need to move the slider to the reference track even if the selection of the upper slider and lower slider is changed during magnetic recording and reproduction.

Therefore, there is an advantage that the information processing speed is not reduced.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a composite magnetic head of the present invention, FIG. 2 is a perspective view of a conventional head, and FIG. 3 is a longitudinal sectional view of a conventional head. 1, l', 11.11'... Core for high track density, 2.2', 12.12'... Core for low track density, 3, 4.4', 14 .14'...
...Slider, 5...Medium.

Claims (1)

[Claims] an upper slider having a first core for low track density and a second core for high track density for magnetic recording and reproduction, a third core for low track density and a fourth core for high track density; In the composite magnetic head, a pair of lower sliders with a core and a lower slider with a medium sandwiched therebetween is provided, wherein the distance between the first and third cores in the medium radial direction around the track width center of each of the first and third cores is A composite magnetic head characterized in that the distances in the medium radial direction from the center of the track width of the second and fourth cores are the same and have a standard value.