JPH0652024U - Flying magnetic head - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a flying magnetic head capable of flying regardless of the rotational speed of a disk, the shape of a flying surface of a slider, and its width. In a floating magnetic head of a magneto-optical recording device, a magnetic converter 9 is provided on a slider 8 and a gas outlet 10 is provided around an air bearing surface 11 of the slider. Then, air or the like is blown out from the gas blowout port to levitate the slider and remove dust and the like adhering to the magneto-optical recording medium 7.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a floating magnetic head in a magneto-optical recording device, and in particular, it can be floated regardless of the rotational speed of the disk, the shape of the air bearing surface of the slider and its width, and is not easily affected by dust or the like. A floating magnetic head.

[0002]

[Prior art]

 Generally, when recording and reproducing on a disk-shaped recording medium such as a magnetic disk or a magneto-optical disk, a magnetic head is used, and the magnetic head is slightly floated on the rotating disk due to the air pressure generated during rotation. Then, recording and playback are performed. Since the magnetic head for a magnetic disk is generally packaged as a magnetic head and disk, it has good sealing performance and is not easily affected by dust and the like, and therefore the head flying height is a few. 100 nm is enough.

On the other hand, in the magneto-optical recording apparatus, since it is necessary to ensure the compatibility of the magneto-optical recording medium, which is a disc, even if the disc is covered with a case, it is possible to maintain the hermeticity as much as the magnetic disc. Since it is not possible to do so, it is easily affected by dust etc. Therefore, the head flying height must be several μm, which is large compared to the previous case. Therefore, in the head of the conventional magneto-optical recording apparatus, in order to increase the flying height, the flying height is proportional to the linear velocity of the disk, so the disk is rotated at a high speed. As disclosed in Kaihei 3-86956, etc., the shape and width of the air bearing surface of the slider have been devised.

An example of the conventional structure will be described with reference to FIG. 9. FIG. 9 is a perspective view showing a conventional flying type magnetic head, in which a magnetic converter 2 is provided at the rear end of a slider 1 of the magnetic head. A taper portion 3 for introducing air is formed at the tip portion. Then, two grooves 5 are formed over the entire air bearing surface 4, which is the lower surface of the slider 1, so that the pressure of the air flow introduced from the taper portion 3 causes the air flow to levitate and stabilizes this air flow backward. It is designed to run.

[0005]

[Problems to be solved by the device]

 By the way, in the conventional structure as described above, no problem occurs when the linear velocity is sufficiently high. However, for example, when the head is located near the center of the disk and sufficient linear velocity cannot be obtained, this becomes small. However, there is a problem in that the head itself does not float sufficiently and is easily affected by dust and the like. The present invention focuses on the above problems and was devised to effectively solve them. The purpose of the present invention is to provide a floating magnetic head in which the head itself is levitated by blowing air. To provide.

[0006]

[Means for Solving the Problems]

 SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a flying magnetic head in a magneto-optical recording device that floats above a rotating magneto-optical recording medium with a small gap, and a slider having an air bearing surface facing the medium. And a magnetic converter provided on the slider, and a gas outlet on the air bearing surface of the slider that opens toward the medium.

[0007]

[Action]

 Since the present invention is configured as described above, a gas blowout port is provided on the air bearing surface of the slider to which the magnetic transducer is attached, and air or the like is blown out from this gas blowout port when the magneto-optical recording medium is rotated. As a result, the air pressure causes the head itself to float. Further, dust and the like on the recording medium are conveyed and removed by the blown air flow, and the influence of dust and the like is reduced.

[0008]

【Example】

 An embodiment of the flying magnetic head according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a perspective view schematically showing an embodiment of a floating magnetic head according to the present invention, and FIG. 2 is a cross-sectional view near the central portion of the head in FIG. As shown in the figure, the flying magnetic head 6 is provided with a slider 8 which is floated so as to face a disk-shaped magneto-optical recording medium 7, a magnetic converter 9 provided at the center of the slider 8, and a slider 8 provided on the slider 8. It is mainly configured by the gas outlet 10. Specifically, the outer frame of the slider 8 is formed into a substantially rectangular parallelepiped shape, and the lower surface thereof is configured as an air bearing surface 11 facing the magneto-optical recording medium 7 in the figure. The magnetic transducer 9 made of, for example, a coil is provided toward the recording medium 7 at the center of the air bearing surface 11, and information is recorded on and reproduced from the magnetic transducer.

On the outer circumference of the air bearing surface 11, for example, the gas outlet 10 formed in a ring shape is formed so as to surround the air bearing surface 11, and the outlet 10 is formed in the slider 8. A gas, such as air, which is communicated with a gas introducing port 13 formed in the ceiling portion of the slider 8 through the gas guiding path 12 and is discharged from the gas introducing port 13 is discharged downward from the blowout port 10 so that the air pressure causes It is configured so that the entire head can be floated. It is preferable to set the angle of the blowout port 10 so that the airflow blown from the blowout port 10 is directed to the lower part of the center of the slider.

The gas inlet 13 is connected to a blower device 15 including, for example, a compressor and a fan via a flexible gas supply passage 14 such as an air hose. The air blower 15 is preferably configured so that the air supply pressure can be varied as necessary.

In addition, a skirt 16 is formed at the peripheral portion of the lower surface of the slider so as to partition the entire outer periphery of the gas outlet 10 and slightly protrudes below the air bearing surface 4. 4 is configured to have good air adhesion and to be able to uniformly fly the slider 8 without being biased. The skirt 16 is made of, for example, an elastic member such as rubber so that the recording medium 7 is not scratched or the like. Needless to say, the skirt 16 may be omitted. A suspension 17 that elastically supports the slider 8 is connected to the upper portion of the slider 8 and is attached to the main body of the device (not shown).

Next, the operation of this embodiment configured as described above will be described. First, when the magneto-optical recording apparatus is driven, the magneto-optical recording medium 7 is rotationally driven, and air is pressure-fed into the slider 8 from the air blower 15 through the gas supply passage 14. The pressure-fed air passes through the gas guide path 12 in the slider 8 and is vigorously ejected toward the surface of the recording medium 7 from the gas outlet 10 provided so as to surround the air bearing surface 11. Due to this blowing pressure, the slider 8 levitates, and the air flow is discharged to the outside through the gap between the skirt 16 provided around the lower end of the slider 8 and the recording medium 7.

Information is recorded and reproduced on the recording medium 7 by the magnetic converter 9 in a state where the slider 8 floats while being supported by the suspension 17 as described above. When flying the slider 8, it is possible to change the flying height by appropriately adjusting the blowing pressure of the air, so that the flying height can be set high even when the linear velocity of the recording medium 7 is low. Is possible.

Further, since the air is blown out, even if dust or the like is attached to the surface of the recording medium 7 or the like, it can be removed by blowing air, and the influence of dust or the like can be eliminated. It is possible to prevent receiving. Further, by providing the skirt 16 around the lower end of the slider 8 as in this embodiment, the air is retained inside the skirt 16 to improve the air tightness, so that the slider 8 can be made uniform without being biased. It will be possible to surface it.

In the above embodiment, the skirt 16 made of an elastic member such as rubber is formed so as to protrude downward around the lower end of the slider 8. However, the present invention is not limited to this and, for example, shown in FIG. As described above, the air skirt 16A made of a film-like elastic member such as rubber which is easily bent by the air pressure of the blower along the opening 18 formed between the lower end peripheral portion of the slider 8 and the peripheral portion of the air bearing surface 11. May be stretched, and a large number of air outlets 10 may be arranged on the inner surface of the air skirt 16A. The air bearing surface 11 is, of course, supported on the ceiling of the slider 8 or the like by a pillar or the like (not shown). As described above, by using the core-air-shaped air skirt 16A made of rubber or the like instead of the skirt, it is possible to improve the accuracy of flatness when the slider is flying, and it is possible to blow air more uniformly. Becomes

In the above embodiment, the magnetic converter 9 is provided at the center of the flying surface 11 provided on the lower surface of the slider 8. However, the present invention is not limited to this and, for example, FIG. As shown in FIG. 5, a magnetic converter 9 may be provided at the rear end of the slider 8 toward the recording medium 7. In FIGS. 4 and 5, the same parts as those shown in FIGS. 1 and 2 are designated by the same reference numerals.

Further, in the above embodiment, the blower 9 is provided separately from the slider 8. However, as shown in FIGS. 6 to 8, the blower 9 may be incorporated in the sliders 19 and 20. It may be configured as follows. 6 shows the air blower 9 incorporated in the slider shown in FIGS. 4 and 5, and FIG. 7 and FIG. 8 show the air blower incorporated in the slider having the air skirt 16A shown in FIG. . Since the air blower shown in FIG. 6 and the air blowers shown in FIGS. 7 and 8 have the same structure, the built-in air blower will be described with reference to FIGS. 7 and 8. The same parts as those of the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in the figure, the outer frame of the slider 20 is formed to be high enough to accommodate the blower device 15. The blower device 15 includes a motor 21 and a fan 22 connected to the rotary shaft. The fan 22 faces one side to the air inlet 25 at the upper part of the slider. The motor 21 is supported by a motor support plate 23 that extends partway inside the slider 20, and a partition wall 24 that partitions the motor 21 is connected to the support plate 23. The partition wall 24 and the inner wall surface of the slider 20 partition to form the gas guide path 12, and the guide path 12 communicates with the gas outlet 10 of the air skirt 16A. Therefore, the air taken in by rotating the fan 22 by the motor 21 flows down the gas guide passage 12 to the air skirt 16A as shown by the arrow, and reaches the air skirt 16A from the gas outlet 10 as described above. The slider 20 is blown toward the surface of the slider and the slider 20 is levitated in the same manner as in the above-described embodiment.

The air bearing surface 11 is supported by, for example, the support column 26, and the slider itself is also supported by the suspension. As described above, when the air blower 15 is incorporated in the slider 20, it is possible to significantly reduce the entire occupied space and contribute to downsizing. Also in this embodiment, the floating amount of the slider 20 can be controlled by changing the rotation speed of the motor and adjusting the blowing pressure.

[0020]

[Effect of device]

 As described above, the floating magnetic head of the present invention can exhibit the following excellent operational effects. Since the slider is levitated by blowing gas from the gas outlet, a large flying height can be obtained regardless of the linear velocity of the magneto-optical recording medium and the shape and width of the head air bearing surface. Further, since the dust and the like on the recording medium can be eliminated by the blown gas, the adverse effect of the dust and the like can be eliminated.

[Brief description of drawings]

FIG. 1 is a perspective view schematically showing an embodiment of a flying magnetic head according to the present invention.

FIG. 2 is a sectional view of the vicinity of the central portion of the head in FIG.

FIG. 3 is a sectional view showing another embodiment of the magnetic head of the present invention.

FIG. 4 is a perspective view showing the magnetic head from below when a magnetic converter is provided at the rear end of the slider.

5 is a perspective view showing the magnetic head shown in FIG. 4 from above. FIG.

FIG. 6 is a perspective view showing a magnetic head in which a blower is incorporated in a slider.

FIG. 7 is a perspective view showing a magnetic head in which an air skirt is provided and a blower is incorporated in a slider.

8 is a cross-sectional view of the magnetic head shown in FIG.

FIG. 9 is a perspective view showing a conventional magnetic head.

[Explanation of symbols]

6 ... Flying type magnetic head, 7 ... Magneto-optical recording medium, 8, 1
9, 20 ... Slider, 9 ... Magnetic converter, 10 ... Gas blowout port, 11 ... Air bearing surface, 15 ... Blower, 16 ... Skirt, 16A ... Air skirt.

Claims (1)

[Scope of utility model registration request] 1. A flying-type magnetic head in a magneto-optical recording device that floats above a rotating magneto-optical recording medium with a minute gap, and a slider having an air bearing surface facing the medium, and a slider provided on the slider. A flying-type magnetic head comprising a magnetic converter and a gas blowing port opened toward the medium side on the flying surface of the slider.