JPH0191383A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To shorten a seek time without decreasing data area by providing a head off-load mechanism to move a magnetic head in the direction separating from the surface of a magnetic disk and to hold it, at the time of rotating the magnetic disk. CONSTITUTION:If a magnetic disk 2 is rotated in the direction of arrow, a solenoid 11 turns on immediately preceeding that the disk 2 reaches a prescribed number of rotation, and attracts the off-load bar 10 of the magnetic head off- load mechanism 4 toward the b-side of the arrow. At this time, the slider 8 with the magnetic head on it of an outer magnetic head assembly 6 is made afloat by the air film on the surface of the disk 2. Also, the slider 9 of an inner magnetic head assembly 7, after sliding on a necessary area, goes to an afloat state. After these actions as the above, a head carriage mechanism 3 executes a prescribed action such as a fast seek, etc., in order to record or reproduce information by the magnetic head on/from the disk 2. In such a way, a seek time can be shortened without decreasing the data area of the disk 2 by means of a simple constitution.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a magnetic one-isk device that performs a storage function in, for example, a combi coater.

(Prior Art) In general, an m1 device such as a computer includes a keyboard having an input function, a display device having an editing and configuring function, and a printing bag RC having an output function.
It is equipped with a magnetic disk device that performs storage functions.

For example, a hard disk type magnetic disk device having a storage function has 3-inch, 5-inch, 5-inch, 25-inch, 8-inch, etc. magnetic disks stacked at intervals of t, and a corresponding one for each magnetic disk. A plurality of magnetic heads are respectively provided.

On the surface of each magnetic disk, there is a data area and a C85 (contact area) where the magnetic head and the magnetic disk come into contact when the magnetic disk device is started and stopped.
t 5tart 5top) areas are provided.

Incidentally, in recent years, in order to shorten the seek time, magnetic disk drives in which a plurality of magnetic heads are provided at intervals in the direction of the magnetic disk have become popular.

However, in such a magnetic disk Vt arrangement, it is necessary to provide a C8S area corresponding to each magnetic head on the surface of the magnetic disk, which causes the problem that the data area on the magnetic disk surface is reduced. be.

(Problems to be Solved by the Invention) The present invention attempts to solve the above-mentioned conventional problems, and is a magnetic disk that has a simple configuration and can shorten seek time without reducing the data area of the magnetic disk. The purpose is to provide equipment.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides a magnetic disk on which information is recorded, and a magnetic disk that records or reproduces information on the magnetic disk. A head 1 comprising a plurality of heads provided at intervals in the radial direction and a head assembly to which the heads are attached via a slider.
- When the magnetic disk rotates, the head is moved and held in the direction away from the surface of the magnetic disk until the head is brought into a flying state by the air film on the surface of the magnetic disk. 7J is characterized by being equipped with a rud-off mechanism.

(Function) The present invention moves the head via the head assembly in a direction away from the surface of the magnetic disk until the head is brought into a flying state by an air film on the surface of the magnetic disk when the magnetic disk rotates. Since the head offload mechanism is provided, the seek time can be shortened with a simple configuration without reducing the data area of the magnetic disk.

(Example) Hereinafter, an example of a magnetic disk device according to the present invention will be described in detail with reference to the drawings.

1 and 2 show a hard disk type magnetic disk device.

As shown in these figures, the magnetic disk storage 1 includes a magnetic disk 2, a head carriage mechanism 3, and a magnetic head offload mechanism 4.

The head carriage mechanism 3 includes a carriage assembly 5.
, an outer magnetic head assembly 6, an inner magnetic head assembly 7, and a slider 8.9 (not shown) for mounting the magnetic head on the right side.

The magnetic head offload mechanism 4 is equipped with an offroad par 10 for offloading the outer magnetic head assembly 6, a solenoid 11 for canceling the offload operation of the offroad par 10, and an offroad par 10. A spring 12 is provided.

Note that 13 indicates a mounting portion of the outer magnetic head assembly 6.

Next, the operation of the magnetic disk device having the above-described configuration will be explained.

First, stoppage of the magnetic disk device 1: Sometimes, the head carriage mechanism 3 is on standby with respect to the magnetic disk 2 at the position shown in FIG. At this time, the slider 9 of the inner magnetic head assembly 7 comes into contact with a C8S area (not shown) provided on the surface of the magnetic disk 2, and the outer magnetic head assembly 6 moves toward the magnetic field located at the arrow a. - It is lifted by the off-road parr 10 of the road mechanism 4.

The solenoid 11 is controlled by a control circuit (not shown) to turn on immediately before the magnetic disk 2 reaches a predetermined number of rotations, and to turn off the solenoid 11 immediately before the predetermined number of rotations of the magnetic disk 2 decreases. υItll be done. Further, the magnetic force generated by the solenoid 11 is made stronger than the biasing force of the spring 12.

Next, when power is applied to the magnetic disk device, the magnetic disk 2 is rotated in the direction of the arrow by a drive I-tor (not shown). Immediately before the magnetic disk 2 reaches a predetermined number of revolutions, the solenoid 11 turns on and generates a magnetic force, which attracts the off-road par 10 of the magnetic head off-load structure 4 to the side indicated by the arrow. Ru.

At this time, the slider 8 that strikes the magnetic head of the outer magnetic head assembly 6 is brought into a flying state by the air film on the surface of the magnetic disk 2. Furthermore, after the slider 9 of the inner magnetic head assembly 7 slides over the C8S area of the magnetic disk 2, it returns to the floating state.

When these operations are performed, the head carriage mechanism 3 performs a predetermined operation such as seeking to 7-S1.
Information is recorded or reproduced on the magnetic disk 2 by a magnetic head (not shown).

Then, after the predetermined operation of the head 1 and the 1fiftI3 is completed, when the power to the magnetic disk device is turned off,
The magnetic disk device is stopped. At this time, just before the predetermined number of rotations of the magnetic disk 2 decreases, the solenoid 11 is turned off, the magnetic force disappears, and the off-load perforator 10 of the magnetic head off-float mechanism 4 is moved by the spring 12 in the direction of arrow a.

In the above embodiments, an example of a magnetic disk drive with two magnetic heads has been described, but the present invention is not limited to this example, and can be applied to any magnetic disk drive with two or more magnetic heads. You can.

In addition, only the magnetic heads located on the outer peripheral side of the magnetic disk 2 are connected to the off-road device 1 of the magnetic head off-load mechanism 4 via the outer magnetic head assembly 6.
0 holds 1'r;,,! (Although we have described an example where the However, the present invention is not limited to this example and can be applied to a floppy disk type magnetic disk device and the like.

[Advantageous Effects of the Invention 1] As explained above, the magnetic disk of the present invention has a simple configuration and can shorten the seek time without reducing the data area of the magnetic disk.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of a magnetic disk device 71 according to the present invention, and FIG. 2 is a partially omitted side view showing the magnetic disk device of FIG. 1. 1... Magnetic disk purchase, 2... Magnetic disk, 3
...head carriage mechanism, 4...magnetic head offload mechanism, 5...-1-17 rigid assembly, 6
... Outer magnetic head assembly, 7... Inner magnetic head assembly, 8.9... Slider, 10
...Offroad Par 10111...Solenoid. Applicant Toshiba Corporation Patent Attorney Sasa Suyama - Figure 1

Claims (1)

[Claims] (1) A magnetic disk on which information is recorded, a plurality of heads that record or reproduce information on the magnetic disk and are provided at intervals in the radial direction of the magnetic disk, and the heads are attached via a slider. a head carriage mechanism having a head assembly; and a head carriage mechanism that moves the head through the head assembly until the head is brought into a flying state by an air film on the surface of the magnetic disk when the magnetic disk rotates. 1. A magnetic disk drive comprising: a head offload mechanism that moves and holds a head in a direction away from the surface of the magnetic disk drive.