JPS5885920A - Magnetic head - Google Patents

Abstract

PURPOSE:To ensure an easy application for a magnetic head of a magnetic recording/reproducing device which is obligated to perform a tracking control, by bonding the magnetic head elements of adverse azimuths into one body. CONSTITUTION:The longer direction of a magnetic gap g1 of the 1st magnetic head element H1 has a clockwise inclination of a prescribed angle theta to the width (Y-Y) direction of a recording locus which is formed by the gap g1. While the longer direction of a magnetic gap g2 of the 2nd magnetic head element H2 has a counterclockwise inclination of a prescribed angle theta the width (Y-Y) direction of a recording locus which is formed by the gap g2. The windings are wound around the cores of the elements H1 and H2 respectively so as to ensure the independent recording and reproducing between the two magnetic head elements.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention is used for magnetic recording and reproducing devices, particularly magnetic recording and reproducing devices that perform recording and reproducing operations according to the so-called tilted azimuth method. Regarding the Fa party head.

(Prior Art) It is well known that various recording and reproducing methods have been proposed in the past in order to realize the demand for high-density recording of information signals on recording media. In the magnetic recording/reproducing method using a recording medium, the longitudinal force of the magnetic gap is smaller than the longitudinal force in the direction perpendicular to the extending direction of the recording trace on the magnetic recording medium. By using magnetic heads that are tilted by an angle (±6°, ±7°), adjacent recording traces on a magnetic recording medium are recorded and reproduced by magnetic heads each having a different azimuth angle. , a so-called tilted azimuth method is adopted, which prevents the information of adjacent recording traces from being reproduced due to so-called azimuth loss and eliminates the need for the unrecorded part (guard punt) that was conventionally provided between adjacent recording traces. Efforts are being made to achieve higher density recording on magnetic recording media.

The applicant company has also been making efforts to commercialize various magnetic recording and reproducing systems or magnetic recording and reproducing devices that can satisfactorily realize high-density recording. Now, by driving and displacing the magnetic head under tracking control so that it can accurately trace the recording trace, it is possible to stably reproduce a good reproduction signal from the magnetic recording medium in the normal reproduction mode. In addition to being effective in the above, it is also effective in stably reproducing a good reproduction signal from a magnetic recording medium in so-called trick play reproduction modes such as still reproduction and slow motion reproduction.

Recently, there has been a demand for devices that can perform various types of trick play playback in home VTRs, etc., and accordingly, home VTRs that are capable of performing various types of trick play playback have also been provided. However, in many of these devices, the magnetic head that is fired during trick play playback cannot accurately follow the recording trace, so so-called bar noise etc. may occur in the reproduced image during trick play playback. A reproduced image of good image quality could not be obtained, such as when the image appeared or fluctuations occurred in the reproduced image.

As a solution to the above-mentioned problems, the applicant company first
Japanese Patent Application No. 54-15348, Japanese Patent Application No. 16821-1982, Japanese Patent Application No. 19986-1986, Japanese Patent Application No. 1987-10645
No. 1, Japanese Patent Application No. 1983-106862, Japanese Patent Application No. 1987-1
No. 08782, etc., a still head drive device having a simple configuration capable of Fa mishead tracking control drive.

By proposing a tracking system for the tB head, it has become possible to provide a magnetic recording and reproducing device that can easily obtain high-quality reproduced images without bar noise or image fluctuations even when performing trick play reproduction.

By the way, in the above-mentioned magnetic recording and reproducing method using the so-called tilted azimuth method, it is necessary to reproduce adjacent recording traces with magnetic heads each having a particular azimuth. When motion playback is performed, the sumi
Because motion playback will be performed, if the recorded image content is of intense motion with large differences between adjacent fields, the motion in the played back sumi-motion image will be The intense portions of the image exhibit a flapping (or flapping) motion, making it impossible to provide a satisfying sumi-motion image to the viewer.

Therefore, even if a reproduced image without bar noise can be obtained by applying the previously proposed magnetic head drive device or tracking method, the applicant's company has decided that even if it is possible to obtain a reproduced image without bar noise by applying the previously proposed magnetic head drive device or tracking method, the flapping noise that appears in the reproduced image during sumi-motion reproduction. AI is a magnetic recording and reproducing method that does not cause any phenomenon.
A pair of magnetic heads with opposite azimuths are mounted facing a rotating body, such that the longitudinal direction of the gap is inclined at a predetermined minute angle in opposite directions with respect to the direction perpendicular to the direction in which the recording trace extends. Magnetic recording is arranged such that when the rotating body is rotated at a predetermined number of rotations, each of the magnetic heads records and reproduces a television signal on a magnetic recording medium field by field. In the playback system S, pairs of magnetic heads, each having the same azimuth as in the playback mode during sumi-motion playback, are arranged approximately perpendicular to the direction in which recording traces on the magnetic recording medium extend. The magnetic heads are mounted oppositely on a drive mechanism configured to drive and displace the magnetic head in the above-mentioned direction, and the magnetic heads having the same azimuth, which form a pair, are mounted on the drive mechanism, and playback is performed by the e and father heads. We have completed a system in which the recorded movement traces to be recorded are continuously reproduced a predetermined number of times, and sumi-motion can be reproduced in units of fields.

(Problems to be Solved by the Invention) As the magnetic head used in the magnetic recording and reproducing system in which tracking control is performed as described above, a combination of the required number of single magnetic heads may be used. , using a magnetic envelope head with such a configuration,
Since assembly and adjustment require a long time, improvements were requested.

(Means for Solving Problems) The present invention provides a first magnetic head element in which the longitudinal direction of the magnetic gap is inclined at a predetermined angle clockwise with respect to the width direction of the recording trace; is inclined at a predetermined angle counterclockwise with respect to the width direction of the recording trace, and Recording and reproducing operations can be performed independently of each other in a state in which the centers of the respective magnetic gaps in the second magnetic head element are separated in the extending direction of the recording trace, and
Said 1st. The second magnetic head element has a magnetic head integrated in such a way that the magnetic gaps thereof individually correspond to adjacent recording traces on the recording medium, and a magnetic head whose longitudinal direction of the magnetic gaps corresponds to the recording traces. a first magnetic head element tilted clockwise at a predetermined angle with respect to the width direction;
A second magnetic head element in which the longitudinal direction of the magnetic gap is inclined at a predetermined angle counterclockwise with respect to the width direction of the recorded trace, and Recording and reproducing operations can be performed independently of each other in a state in which the centers of the respective magnetic gaps in the second magnetic head element are separated from each other in the extending direction of the recording trace, and the magnetic gap in the second magnetic head element is arranged such that recording and reproducing operations can be performed independently of each other. The second magnetic head element produces an overlapping portion in the recording trace formed on the recording medium by the S air gap. This is what we are trying to resolve.

(Example) Factors 1 to 6 in the attached drawings are 6 of the magnetic head of the present invention.
These are front views (FIGS. 1 and 4), perspective views (FIGS. 2 and 5), and partial perspective views (3rd factor and FIG. 6) showing different embodiments, and in each figure, H□ is a first magnetic head element, H2 is a second magnetic head element, the first magnetic head element H1 is provided with a magnetic gap g1, and -
The second magnetic head element H has a magnetic gap g2.

The magnetic gap g of the first magnetic head element H has its longitudinal direction clockwise relative to the width direction of the recording trace to be formed by the magnetic gap g (Y-Y direction in the figure). The magnetic head element is inclined at a predetermined angle θ, and a magnetic gap g2 for the second magnetic head element is formed.
is a state in which its longitudinal direction is inclined counterclockwise by a predetermined angle θ with respect to the width direction of the record trace to be formed by the mm-shaped gap fhK (YY direction in the figure). It is considered to be the property of

It goes without saying that the first and second magnetic head elements HI and H2 are constructed by winding their respective cores so that they each perform recording and reproducing operations independently. . Reference numbers 1 and 2 in FIGS. 2, 3, 5, and 6 are winding holes; however, in the magnetic heads shown in FIGS. 1 and 4, those 1. A winding hole is formed in the core of the second magnetic head element, and the core is wound using the winding hole.

In FIGS. 1, 2, 4, and 5, the symbol I indicates a magnetic short-circuit prevention member made of a non-magnetic material. The air gap may be magnetically shorted by a core in another magnetic head element used in conjunction with that magnetic head element.

In each of the 511 heads shown in FIGS. 1 to 6, the first magnetic head element H8 and the second 1121 head element H8 are located at the center of each magnetic gap g1+gt (the longitudinal direction of each magnetic gap). The magnetic head elements H, . H2 is bonded and fixed in a so-called reverse azimuth manner.

The magnetic head shown in FIGS. 1 to 3 has a first magnetic head element H8 and a second magnetic head element H8 with respect to VcM.
2 are made in such a combination configuration that no overlapping portion is created in the recording traces to be formed by the magnetic gaps g+ + gt, and the magnetic gaps g+ + gt shown in FIGS. The head has a first magnetic head element H1 and a second magnetic head element H2,
These magnetic gaps gttg2 are designed to have a combination configuration that can produce an overlapping width portion as shown by O4 in the figure in the recording trace to be formed.

In FIGS. 1 to 6, the symbols TW, , TW,
This figure shows the inside of the recording trace to be formed by the magnetic gap g of the first magnetic head element H, and the magnetic gap g2 of the second magnetic head element H2 in the magnetic head.

(Effects) As described above, the magnetic head of the present invention is configured by integrally fixing the eleventh and second magnetic head elements of opposite azimuth so as to correspond to adjacent recording traces. It can be easily used as a magnetic head of a magnetic recording/reproducing device that is designed to perform control, and the first. If the distance between the centers of the respective gaps in the second magnetic head element is made equal to, for example, the length of IA of one horizontal scanning period on the recording trace (recording length of V2), then Sumi-motion playback also provides a measurement point where a complete television signal with so-called V2 processing can be obtained immediately. If selected for a long time.

Manufacturing can be made even easier.

Also, 1st. Magnetic air in the second magnetic head elements H1 and H2! ! If ig and Igt partially overlap in the width direction of the recording traces, the first and second magnetic head elements H, , H@ form adjacent recording traces without any gaps. or a pair of first and second f
A tracking reference signal can also be created based on the reproduced signals from the f1fi head elements H, l-.

[Brief explanation of the drawing]

1 to 6 are front views (FIGS. 1 and 4) and perspective views (FIGS. 2 and 4) showing different embodiments of the magnetic head of the present invention.
Figures 3 and 5) and partial perspective views (Figures 3 and 6). Ho...first magnetic head element, H2...second magnetic head element, g++gz...magnetic gap, ■...magnetic short circuit prevention member made of non-magnetic material, m8...-magnetic Shielding plate, 1.2... winding hole,

Claims (1)

[Claims] 1. A first magnetic head element in which the longitudinal direction of the magnetic gap is inclined clockwise at a predetermined angle with respect to the width direction of the recording trace; The second AI head element is inclined at a predetermined angle counterclockwise with respect to the width direction, and the second AI head element is inclined at a predetermined angle counterclockwise with respect to the width direction. The centers of the respective magnetic gaps in the second magnetic head element are spaced apart in the direction in which the recording trace extends, so that recording and reproducing operations can be performed independently of each other. The second magnetic head element is a magnetic head 2 which is integrated in such a way that the magnetic gaps thereof individually correspond to adjacent recording traces on the recording medium, and the longitudinal direction of the magnetic gaps is the recording trace. A first magnetic head element is tilted at a predetermined angle clockwise with respect to the width direction of the recording trace, and a longitudinal direction of the magnetic gap is tilted at a predetermined angle counterclockwise with respect to the width direction of the recording trace. The second a1 head element having the above-described first. Recording and reproducing operations can be performed independently of each other in a state where the centers of the respective magnetic gaps in the second magnetic head element are separated from each other in the extending direction of the recording trace, and the first... The second magnetic head element is an integrated magnetic head that can cause an overlapping portion in the recording trace formed on the recording medium by the magnetic gap between them.