JPS59144023A - Magnetic head - Google Patents

Abstract

PURPOSE:To obtain the recording tracks more than the moving frequencies of a moving means of a magnetic head and at the same time to facilitate a production of the magnetic head, by setting the space between the magnetic head and plural gaps at a prescribed multiple as much as the number of track pitches and gaps. CONSTITUTION:A magnetic head consists of a core slider 1, record/reproduction cores 2 and 3, record/reproduction gaps 4 and 5, and a record/reproduction coil 7. The space Tg between gaps 4 and 5 is set at an integer multiple plus 1 as much as the number of gaps and at triple as much as the product of track pitches. The gaps exist at positions 109 and 110, and the record/reproduction is carried out with tracks 101 and 104. When the magnetic head is shifted by a step, the feed width is double as much as the track pitch since the number of gaps is set at 2. Then the gaps are positioned at 111 and 112, and the record/ reproduction is carried out with tracks 103 and 104. Thus no overlap is produced between tracks. The production is facilitated for the magnetic head since the space Tg can be increased.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a structure of a magnetic head that waits for a plurality of gaps and a method of moving the magnetic head.

Recently, magnetic recording devices are becoming smaller and larger in size and weight. In order to miniaturize and increase capacity and weight, it is necessary to improve recording density, and for this purpose, it is necessary to improve linear recording density and track density. with this,
Improvements in magnetic heads are also required.

In a conventional magnetic head having one gap, as the track density increases, the number of tracks increases and the track width becomes narrower, so a magnetic head assembly, precision, and a moving means for feeding the magnetic head by the number of tracks are required. However, within the constraints of miniaturization of the device, it has been difficult to fabricate a complete magnetic head moving means that is accurate enough to obtain the required number of times the magnetic head is moved.

Furthermore, in a magnetic head having a plurality of gaps, as the track density increases, it is necessary to narrow the distance between the gaps. However, since the recording/reproducing core and the recording/reproducing coil are generally thicker than the track pitch, it has been difficult to manufacture a magnetic head to improve the track density by narrowing the distance between the gaps.

Second, when a single magnetic head moving means is equipped with a plurality of magnetic heads, a magnetic head support means is required for each head, which results in a complicated structure and cannot accommodate miniaturization of the device. .

In order to solve these problems, the present invention sets the distance between the gaps of a magnetic head having a plurality of gaps to be the product of the total track pitch and an integral multiple of the number of gaps + 1, and the width of one movement of the magnetic head is The product of the total track pitch and the number of gaps allows more recording tracks to be obtained than the number of movements of the magnetic head moving means, and by making the mutual spacing of each gap the same, the manufacturing of the magnetic head is facilitated. The whole purpose is to do that.

Embodiments of the present invention will be described below with reference to FIGS. 1 to 4.

FIG. 1 shows an embodiment of a magnetic head according to the present invention.

In FIG. 1, 1 is a core slider, 2.3 is a recording/reproducing core, 4.5 is a recording/reproducing gap, 6.7 is a recording/reproducing coil, and Tg is a gap interval.

In the non-example, there are two gaps, and gear puffers 4 to 5.
The zero interval tg is six times the track pitch.

FIGS. 2 to 4 show the process of recording on a recording medium according to a non-embodiment. 101-108 indicate the B1 recorded tracks 109-114 the gap positions. tp
is the track pitch.

FIG. 2 shows the relationship between gaps and recording tracks at a certain point in time. The gap is located at 109 degrees and 110 degrees, and recording and reproduction are performed on tracks 101 and 104.

FIG. 3 shows the situation when the magnetic head is moved one step. In this embodiment, since the number of gaps is two, the feed width is twice the track pitch, and the gap order t is 111, 112) Recording and reproduction are performed in racks 105 and 106.

Figure 4 shows the water content when moving one step further in the same direction. The gap positions are 113 and 114, and recording and reproduction are performed on tracks 105 and 108.

Therefore, according to this embodiment, the number of recording tracks is twice the number of times the magnetic head is moved, and the tracks do not overlap. This is because odd-numbered tracks and even-numbered tracks are recorded and reproduced using different gaps, and in order to maintain this relationship, the gap interval (in non-example, the gap interval Tg'k) is adjusted to the rack pitch. Tp
It may be set to any value as long as it is set as the product of the interval t' between the gaps, an integer multiple of the number of gaps + 1, and the track pinch Tp.

Although the number of gaps is limited to 't''2 in the non-example, even if the number of gaps is 3 or more, each gap can be adjusted by making the moving width of the magnetic head the product of the track pitch and the number of gaps. The number of recording tracks is the product of the number of gaps and the number of times the magnetic head moves.In addition, the distance between the gaps is also determined by You can set it to any value as long as it maintains the correspondence.

As described above, according to the magnetic head and the method for moving the magnetic head according to the present invention, it is possible to obtain as many tracks as the product of the number of feeds of the magnetic head moving means and the number of gaps. Therefore, the number of tracks can be increased with a single magnetic head, which is effective for downsizing and increasing the capacity of magnetic recording devices. Furthermore, since it is possible to widen the distance between the gaps, conventional techniques can be used to manufacture a magnetic head with multiple gaps.

Also, the means for moving the magnetic head is conventional! Therefore, it becomes easy to put a compact, large-capacity magnetic recording device into practical use.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of a magnetic head according to the present invention. 2 to 4 are diagrams showing the relationship between the position of the recording/reproducing gap and the recording track according to the moving method of the present invention. 1...Core slider 2,3...Recording/reproducing core 4.5...Recording/reproducing gap 6,7...Arranging/reproducing coil 101-10B...Recording track 109-1
14... Recording/reproducing gap position 6- Written amendment (method) Commissioner of the Japan Patent Office 1. Indication of the case 1988 Patent application No. 18434 2. Name of the invention Magnetic head Applicant (236) Suwa Seikosha Co., Ltd. Representative Tsuneya Nakamura 4 Agent 5 Date of amendment order May 31, 1981, '7, Written amendment of drawings subject to amendment (method) % formula %

Claims (2)

[Claims] (1) Multiple recording/reproducing gaps (hereinafter referred to as gaps)
1. A magnetic head having a magnetic head having a distance between the gaps that is a product of an integer multiple of the number of gaps + 1 and a track pitch. (2) The magnetic head according to claim 1, wherein the width of one feed is expressed as a percentage of the movement as a product of the track pitch and the number of gaps.