JPH0922571A - Magnetic head retraction system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the magnetic head retraction system capable of a quick return. SOLUTION: In a magnetic recording and reproducing device mounted with a magnetic head 1 for recording and reproducing data on a disk surface, the magnetic head 1 is formed integrally with or constituted integrally with a slider 4, and also the magnetic head retraction system is constituted for the purpose of retraction the magnetic head 1 into the slider 4 or into a position higher than a min. gap between the slider 4 and the disk in the neighborhood. By this method, the magnetic head 1 is retracted its place without controlling a tracking operation, and hence returned quickly to the next recording and reproducing operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an FDD or HDD.
The present invention relates to a magnetic head retracting system in a magnetic recording / reproducing apparatus using a magnetic head such as the above.

[0002]

2. Description of the Related Art Conventionally, a detector, which mainly detects an impact of a hard disk-equipped device, mainly holds an acceleration sensor, and moves a head to a shipping zone based on a signal generated from the detector.

[0003]

However, in the prior art, if the head is retracted to the shipping zone when a disturbance is detected, it takes time for evacuation and restoration. Furthermore, there is a risk of head crash even during evacuation.

[0004]

SUMMARY OF THE INVENTION The present invention aims to solve these problems of the prior art and provides a magnetic head retracting system.

In order to solve the above-mentioned problems, the present invention is a magnetic recording / reproducing apparatus which mounts a magnetic head and records / reproduces data on / from a disk surface. The magnetic head retraction system is configured to evacuate the magnetic head to a position higher than the minimum gap between the slider and the disk in or near the slider when a disturbance that disturbs recording and reproduction by the magnetic head occurs.

[0006]

With the above-mentioned structure, when a disturbance that disturbs recording and reproduction by the magnetic head occurs,
The magnetic head can be evacuated to a position higher than the minimum gap between the slider and the disk in or near the slider.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

In the drawings, the same parts are designated by the same reference numerals.

The present invention will be described below by taking a composite head using an HDD as an example. FIG. 1 is a schematic explanatory view of a main part showing a magnetic head and a slider part of the present invention.
FIG. 2 is a flow chart for explaining the operation of the magnetic head retracting system of the present invention.

Reference numeral 1 denotes a magnetic head, and the magnetic head 1
Are supported by the piezoelectric element 2 and integrated with the slider 4 by the arm 3. The arm 3 is adapted to access the disk surface by a carriage or the like (not shown).

The operation of the present invention will be described with reference to FIG.

First, when a disturbance is detected, a retracting signal for the magnetic head 1 is sent from a detector (not shown) to the control section of the apparatus main body, and an interrupt is generated (step 1). Here, the magnetic head 1 shown in FIG. 1 is supported by an actuator such as a piezoelectric element 2, but the piezoelectric element 2 is made to operate in response to a retracted signal sent.

When the retract signal is sent, a command for retracting the magnetic head 1 is issued from the document control information (step 2), and the piezoelectric element 2 acts in the direction of separating the magnetic head 1 from the disk, and the slider 4 and The magnetic head 1 is evacuated to a position higher than the minimum gap between the disks (step 3).
That is, the disk and the magnetic head 1 are arranged so as not to physically contact with each other.

Here, the tracking of the carriage or arm 3 does not move. Next, when the disturbance has subsided and a certain time has elapsed (step 4), the presence or absence of an acceleration detection signal is checked. If the acceleration detection signal is present, the presence or absence of the acceleration detection signal is checked after waiting for a predetermined time (step 5). When the acceleration detection signal is absent, it is determined that the document control information can be read and written (step 6), and the piezoelectric element 2 acts in the opposite direction as before, and the magnetic head 1 is arranged at a position where appropriate recording and reproduction can be performed. (Step 7). Here, the reproduction envelope may be further observed, and the height of the magnetic head 1 may be finely controlled so that the reproduction envelope has the maximum value (step 8 to step 1).
1).

[0015]

As described above, according to the structure and method of the present invention, the magnetic head is retracted on the spot without controlling the tracking operation.
Fast return to playback. There is no need to evacuate to the shipping zone, so there is no need to worry about head crashes while evacuating. Further, the magnetic head can be arranged at an appropriate height while observing the reproduction envelope.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view of a main part showing a magnetic head and a slider part of the present invention.

FIG. 2 is a flow chart for explaining the operation of the magnetic head retracting system of the present invention.

[Explanation of symbols]

 1 magnetic head 2 piezoelectric element 3 arm 4 slider

Claims (1)

[Claims] 1. A magnetic recording / reproducing apparatus for mounting a magnetic head and recording / reproducing data on / from a disk surface, wherein the magnetic head is integrated with or integrated with a slider, and the magnetic head interferes with recording / reproducing. A magnetic head retraction system characterized in that when a certain degree of disturbance occurs, the magnetic head is evacuated to a position higher than the minimum gap between the slider and the disk in or near the slider.