JPH09330502A - Fixed magnetic head apparatus for vertical magnetic recording - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate stable recording and reproduction at a high density over a long period of time and improve a recording density to the extent beyond the level determined from the characteristics of a fixed magnetic head by improving running stability of a magnetic tape. SOLUTION: This apparatus is constituted by providing a fixed magnetic head 1 for performing recording and reproduction on one side of a magnetic tape T, and disposing a running stabilizing plate 2 for stabilizing running of the magnetic tape T so as to oppose the fixed magnetic head 1 with the magnetic tape T interposed therebetween, wherein the running stabilizing plate 2 is made of a soft magnetic material in order to increase a density of magnetic flux from the fixed magnetic head 1. Alternatively, the running stabilizing plate 2 is provided with an auxiliary head for increasing the magnetic flux density of the fixed magnetic head 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixed magnetic head device for perpendicular magnetic recording. More specifically, the present invention relates to a fixed magnetic head device for perpendicular magnetic recording that enhances running stability of a magnetic tape and enables high density recording / reproduction.

[0002]

2. Description of the Related Art Conventionally, a fixed head having a relatively simple structure, few failures, little damage to a magnetic recording medium at the time of recording / reproducing, and capable of narrowing a track by using a servo signal is used. The perpendicular magnetic recording system that has been used is attracting attention. Further, in this case, it is required to use a magnetic tape for perpendicular magnetic recording capable of recording a large capacity as a magnetic recording medium.

As a magnetic head device used in such a perpendicular magnetic recording system, a fixed magnetic head is generally arranged so as to be located on one side of a running magnetic recording medium. FIG. 10 shows a configuration diagram of a main part of such a magnetic head device. In FIG. 10, the magnetic tape T includes at least a pair of guides 100a.
And a pair of guides 100a.
And 100b, a fixed magnetic head 101 is arranged so as to be in pressure contact with the magnetic tape T.

[0004]

However, in the case of the fixed magnetic head device for perpendicular magnetic recording as shown in FIG. 10, when the magnetic tape T vibrates between the pair of guides 100a and 100b, the fixed magnetic head is used. There is a problem that it becomes difficult to perform appropriate recording and reproducing by 101.

Further, a magnetic tape T having high running flexibility
On the other hand, in order to keep the fixed magnetic head 101 in contact with a constant pressure, it is necessary to press the magnetic tape considerably strongly, and there is a concern that the magnetic tape T may be damaged. The wear of the surface of the head 101 cannot be ignored. Therefore, there is a problem that it is difficult to perform stable recording / reproduction with high density for a long time.

Further, when the fixed magnetic head 101 and the magnetic tape T comprising the base Tb and the magnetic layer Tm are observed from the side, as shown in FIG.
Flow B of magnetic flux 01 (Magnetic flux density in the magnetic layer Tm)
However, it is substantially free from the constraint of the external magnetic field and depends on the characteristics of the fixed magnetic head 101. However, it is required to improve the recording density more than the characteristics of the fixed magnetic head 101. .

The present invention is intended to solve the above-mentioned problems of the prior art, and enables stable recording / reproduction at a high density for a long time with respect to a magnetic head device for perpendicular magnetic recording. The purpose is to improve the recording density beyond the characteristics of the head.

[0008]

SUMMARY OF THE INVENTION The inventor of the present invention arranges a traveling stabilizing plate for stabilizing traveling of a magnetic tape so as to face the fixed magnetic head with the magnetic tape interposed therebetween, thereby You can stabilize the running of the tape,
Further, in order to increase the density of the magnetic flux of the magnetic head passing through the magnetic layer of the magnetic tape, the travel stabilizing plate should be formed of a soft magnetic material, or an auxiliary head should be positively provided in the travel stabilizing plate. The present invention has been completed and the present invention has been completed.

That is, according to the present invention, in a fixed magnetic head device for perpendicular magnetic recording having a fixed magnetic head for recording / reproducing on one side of a magnetic tape, a running stabilizing plate for stabilizing running of the magnetic tape is provided. Vertically arranged so as to face the magnetic head via a magnetic tape, and the running stabilizing plate is made of a soft magnetic material so as to increase the density of the magnetic flux of the fixed magnetic head. A fixed magnetic head device for magnetic recording is provided.

Further, according to the present invention, in a fixed magnetic head device for perpendicular magnetic recording having a fixed magnetic head for recording and reproducing on one side of a magnetic tape, a running stabilizing plate for stabilizing running of the magnetic tape is provided. It is arranged so as to face the fixed magnetic head via a magnetic tape, and the traveling stabilizing plate is provided with an auxiliary head for increasing the density of the magnetic flux from the fixed magnetic head. A fixed magnetic head device for perpendicular magnetic recording is provided.

Further, the present invention provides a magnetic recording / reproducing apparatus provided with such a fixed magnetic head device for perpendicular magnetic recording.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a cross-sectional view of the essential parts of an embodiment of a fixed magnetic head device for perpendicular magnetic recording of the present invention. As shown in the figure, in the fixed magnetic head device for perpendicular magnetic recording, the fixed magnetic head 1 is provided so as to be located on one side of the magnetic tape T, and in order to stabilize the running of the magnetic tape T, A travel stabilizing plate 2 is arranged so as to face the fixed magnetic head 1. Here, the traveling stabilizing plate 2 is
It is made of a soft magnetic material so that the magnetic flux density of the fixed magnetic head 1 increases.

The reason why the running of the magnetic tape T can be stabilized by providing the running stabilizing plate 2 in this way is as follows. That is, when the magnetic tape T starts running, an air flow is generated in the vicinity of the magnetic tape T, the air flow enters between the magnetic tape T and the travel stabilizing plate 2, and the magnetic tape T receives this inflow. Since the traveling is performed so that the pressure of the generated airflow is kept constant, the traveling stabilizing board 2 can be stably run, and the vibration of the magnetic tape T can be suppressed on the traveling stabilizing board 2. Is. Therefore, the spacing between the magnetic tape T and the fixed magnetic head 1 can be kept constant, and a stable reproduction output can be obtained.

Further, by providing the traveling stabilizing plate 2 on the back surface of the magnetic tape T, the fixed magnetic head 1 has a smaller pressing force than the pressing force of the conventional fixed magnetic head 101 as shown in FIG. , The magnetic tape T can be continuously kept in pressure contact. For this reason, damage to the magnetic tape T and wear of the magnetic head can be greatly suppressed.

Further, by forming the running stabilizing plate 2 from a soft magnetic material such as ferrite, as shown in FIG. 2 (a), as compared with the case of the conventional fixed magnetic head (FIG. 2 (c)). It is possible to increase the magnetic flux density of the fixed magnetic head 1 and improve the recording density.

If it is desired to further improve the magnetic flux density and the recording density of the fixed magnetic head 1 as compared with the case of the embodiment shown in FIG. 2A, as shown in FIG.
In addition, an auxiliary head 3 for increasing the magnetic flux density of the fixed magnetic head 1 is provided. As a result, as shown in FIG. 2B, the magnetic flux density and the recording density of the fixed magnetic head 1 can be calculated as shown in FIG.
It can be further improved as compared with the case of (a).

The position where the auxiliary head 3 is provided can be appropriately provided on the front surface, the back surface, the center of the inside, the end portion, etc. of the travel stabilizing plate 2, if necessary, but the travel stabilizing plate 2 is fixed. It is preferably arranged at a position facing the magnetic head 1.

Further, as shown in FIG. 4, by forming the groove 4 around the auxiliary head 3, the adhesion of the magnetic tape T to the auxiliary head 3 provided on the traveling stabilizing plate 2 can be increased. preferable.

In the case of the fixed magnetic head device for perpendicular magnetic recording of any of the embodiments shown in FIGS. 1 and 3, the relative sizes of the fixed magnetic head 1 and the travel stabilizing plate 2 are generally: As shown in FIGS. 1 and 3, the traveling stabilizing plate 2 is larger than the stationary magnetic head 1 because the traveling stabilizing plate 2 requires a larger area, but FIGS. )
The sizes may be the same as shown in FIG.

When the above-described fixed magnetic head device for perpendicular magnetic recording of the present invention is incorporated in a magnetic recording / reproducing device, as shown in FIG. 6, the fixed magnetic head 1 and the travel stabilizing plate 2 are It is preferable that they are connected to the same voice coil 7 by a fixed magnetic head arm 5 and a travel stabilizing plate arm 6, respectively. In this case, at least one of the fixed magnetic head arm 5 and the travel stabilizing plate arm 6 so that the pressure applied to the magnetic tape T by the fixed magnetic head 1 can be adjusted (that is, can be held within a predetermined pressing range), Alternatively, it is preferable that both are made of an elastic material such as a leaf spring. For example, when the traveling stabilizing plate arm 6 is formed of a material having high rigidity and the fixed magnetic head arm 5 is formed of a plate spring, the fixed magnetic head arm 5 is formed.
Becomes movable (FIG. 7 (a)). In the opposite case, the travel stabilizing plate arm 6 becomes movable (FIG. 7 (b)). Further, when both the fixed magnetic head arm 5 and the travel stabilizing plate arm 6 are formed of plate springs, both are movable (FIG. 7).
(C)).

As another means for adjusting the pressure applied to the magnetic tape T by the fixed magnetic head 1, an elastic member (for example, a coil spring) 8 is provided between the fixed magnetic head arm 5 and the travel stabilizing plate arm 6. It can be mentioned that the connection is made by (FIGS. 8A to 8C). In this case, the rotary shaft 5a is attached to the voice coil side end of the fixed magnetic head arm 5.
May be provided (FIG. 8 (a)), and the traveling stabilizing plate arm 6 may be provided.
The rotary shaft 6a may be provided at the end of the voice coil on the voice coil side (FIG. 8B). Alternatively, they may be provided at the same time (FIG. 8 (c)).

The above-described fixed magnetic head device for perpendicular magnetic recording of the present invention can be applied to various magnetic recording / reproducing devices using a magnetic tape for perpendicular magnetic recording and a fixed head for perpendicular magnetic recording. For example, FIG. 9 (FIG. 9A)
It can be incorporated into a magnetic recording / reproducing apparatus as shown in a schematic perspective view and a schematic side view of FIG. In this magnetic recording / reproducing apparatus, the magnetic tape T wound on the reel 90a is wound on the reel 90b. The reels 90a and 90b are reel motors 91a and 91b.
and the magnetic tape T is engaged with the guide 9
Driving is restricted by 2a and 92b. The fixed magnetic head device for perpendicular magnetic recording, which includes the fixed magnetic head 1 fixed to the voice coil 7 and the traveling stabilizing plate 2 between the guides 92a and 92b, is a fixed magnetic head 1 and the traveling stabilizing plate 2. The magnetic tape T is sandwiched between and.

Since the magnetic recording / reproducing apparatus having such a structure uses the fixed head for perpendicular magnetic recording of the present invention, the running of the magnetic tape is very stable and the recording density is improved. Has become.

[0025]

According to the present invention, the running property of a magnetic tape in a magnetic head device for perpendicular magnetic recording is stabilized, stable recording and reproduction can be performed at a high density for a long time, and the characteristics of a fixed magnetic head are exceeded. The recording density can be improved.

[Brief description of drawings]

FIG. 1 is a configuration diagram of essential parts of an embodiment of a fixed magnetic head device for perpendicular magnetic recording of the present invention.

FIG. 2 is an explanatory diagram ((a), (b), (c) in the same figure) of the flow of magnetic flux of the fixed magnetic head.

FIG. 3 is a main part configuration diagram of another embodiment of a fixed magnetic head device for perpendicular magnetic recording of the present invention.

FIG. 4 is a main part configuration diagram of another embodiment of a fixed magnetic head device for perpendicular magnetic recording of the present invention.

FIG. 5 is an explanatory diagram of a size relationship between a fixed magnetic head and a travel stabilizing plate in the fixed magnetic head device for perpendicular magnetic recording of the present invention ((a) and (b) in the same figure).

FIG. 6 is an explanatory diagram when the fixed magnetic head device for perpendicular magnetic recording of the present invention is incorporated in a magnetic recording / reproducing device.

7A and 7B are an explanatory view when the fixed magnetic head arm is formed of a leaf spring (FIG. 7A) and an explanatory view when the traveling stabilizing plate is formed of a leaf spring (FIG. 7B). It is explanatory drawing (the same figure (c)) at the time of forming a fixed magnetic head arm and a running stabilization board from a leaf spring.

8 is an explanatory view ((a) to (c) in the figure) in the case where the fixed magnetic head arm 5 and the travel stabilizing plate arm 6 are connected by a coil spring. FIG.

FIG. 9 is a configuration diagram (a perspective view of FIG. 9A and a side view of FIG. 9B) of a main part of a magnetic recording / reproducing apparatus using a fixed magnetic head device for perpendicular magnetic recording of the present invention.

FIG. 10 is an explanatory diagram of a conventional magnetic head for perpendicular magnetic recording.

[Explanation of symbols]

1 ... Fixed magnetic head 2 ... Running stabilizing plate 3 ... Auxiliary head 4 ... Groove 5 ... Fixed magnetic head arm 6 ... Running stabilizing plate arm 7 ... Voice coil

Claims (16)

[Claims] 1. In a fixed magnetic head device for perpendicular magnetic recording in which a fixed magnetic head for recording and reproducing is provided on one side of a magnetic tape, a running stabilizing plate for stabilizing running of the magnetic tape is provided. And a traveling stabilizing plate formed of a soft magnetic material so as to face the magnetic head via a magnetic tape and to increase the density of the magnetic flux of the fixed magnetic head. Fixed magnetic head device for perpendicular magnetic recording. 2. The soft magnetic material is ferrite.
A fixed magnetic head device for perpendicular magnetic recording according to claim 1. 3. The fixed magnetic head for perpendicular magnetic recording according to claim 1, wherein the fixed magnetic head and the running stabilizing plate are connected to one voice coil by the fixed magnetic head arm and the running stabilizing plate arm, respectively. apparatus. 4. The at least one of the fixed magnetic head arm and the travel stabilizing plate arm is made of an elastic material so that the pressure applied to the magnetic tape by the fixed magnetic head can be adjusted. Fixed magnetic head device for perpendicular magnetic recording. 5. The fixed magnetic head device for perpendicular magnetic recording according to claim 4, wherein the elastic material is formed of a leaf spring. 6. The elastic member is connected between the fixed magnetic head arm and the travel stabilizing plate arm so that the pressure applied to the magnetic tape by the fixed magnetic head can be adjusted. Fixed magnetic head device for perpendicular magnetic recording. 7. The fixed magnetic head device for perpendicular magnetic recording according to claim 6, wherein the elastic member is a coil spring. 8. A fixed magnetic head device for perpendicular magnetic recording, wherein a fixed magnetic head for recording and reproducing is provided on one side of a magnetic tape, wherein a running stabilizing plate for stabilizing running of the magnetic tape is provided. , The magnetic head is disposed so as to face the fixed magnetic head via the magnetic tape, and the travel stabilizing plate is provided with an auxiliary head for increasing the density of the magnetic flux from the fixed magnetic head. And a fixed magnetic head device for perpendicular magnetic recording. 9. The fixed magnetic head device for perpendicular magnetic recording according to claim 8, wherein an auxiliary head is arranged at a position facing the fixed magnetic head of the travel stabilizing plate. 10. The fixed magnetic head device for perpendicular magnetic recording according to claim 9, wherein a groove is formed around the auxiliary head. 11. The fixed magnetic head and the traveling stabilizing plate are
The voice coil is connected to one voice coil by a fixed magnetic head arm and a travel stabilizing plate arm, respectively.
11. The fixed magnetic head device for perpendicular magnetic recording according to any one of 10. 12. The method according to claim 8, wherein at least one of the fixed magnetic head arm and the travel stabilizing plate arm is made of an elastic material so that the pressing of the fixed magnetic head against the magnetic tape can be adjusted. Fixed magnetic head device for perpendicular magnetic recording. 13. The fixed magnetic head device for perpendicular magnetic recording according to claim 12, wherein the elastic material is formed of a leaf spring. 14. The elastic member is connected between the fixed magnetic head arm and the travel stabilizing plate arm so that the pressure applied to the magnetic tape by the fixed magnetic head can be adjusted. Fixed magnetic head device for perpendicular magnetic recording. 15. The elastic member is a coil spring.
4. A fixed magnetic head device for perpendicular magnetic recording according to 4. 16. A magnetic recording / reproducing apparatus having the fixed magnetic head device for perpendicular magnetic recording according to claim 1. Description: