JP2612993B2 - Magnetic storage device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic storage device.

In recent years, with the miniaturization of computers, ultra-miniaturization of magnetic storage devices as external storage means of computers has been required.

[0003]

2. Description of the Related Art A conventional magnetic storage device has a structure in which a magnetic disk is rotated by a motor, and it has been difficult to miniaturize the magnetic disk.

In order to achieve ultra-miniaturization, the present applicant has previously filed Japanese Patent Application No. 3-238439, entitled "Magnetic Storage Device".
Suggested.

The magnetic storage device 1 has a configuration schematically shown in FIG.

The rectangular magnetic medium 2 has one long side 3
Along, track position information 4 indicating the position of the track is recorded.

The output of the piezo drive circuit 5 causes the substrate 6
The upper head support arm 7 vibrates simply in the direction of arrow X.

The head 8 reads the track position information 4 and sends it to the signal processing circuit 9, confirms that the circuit 9 has read the track position information 4, subsequently writes the information on the magnetic medium 2, and To form

A signal corresponding to the deviation between the read track position information 4 and the target track is supplied from the signal processing circuit 9 to the electrostatic motor driving circuit 11, and this circuit 1
1 operates, an electrostatic motor (not shown) is driven by the motor drive signal output from the motor, the magnetic medium 2 is moved in the direction of the arrow Y, and a track is formed at a new portion.

[0010]

The above-described device 1 is configured to operate under the control of the track position information 4 on the magnetic medium 2.

For this reason, the control becomes complicated.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a magnetic storage device which simplifies control by making track position information unnecessary.

[0013]

According to a first aspect of the present invention, there is provided a magnetic medium section, a head in contact with the magnetic medium section, a head simple vibration means for causing the head to perform a simple vibration at a first cycle,
A magnetic medium unit simple vibration that causes the magnetic medium unit to vibrate in a direction orthogonal to the direction of the simple vibration of the head in a second cycle greater than the first cycle in synchronization with the simple oscillation of the head. Means.

According to a second aspect of the present invention, there is provided a magnetic medium section, a head in contact with the magnetic medium section, a head simple oscillation means for making the head simple oscillation at a first cycle, and a head simple oscillation means. A simple vibration means for performing a simple vibration in a second cycle larger than the first cycle in synchronization with the simple vibration of the head in a direction orthogonal to the direction of the simple vibration. .

[0015]

According to the construction in which the magnetic medium unit simple vibration means is provided in addition to the head simple vibration means, even if the position information is not recorded on the magnetic medium, the track is formed at a predetermined position on the magnetic medium. Acts to let.

According to the second aspect of the present invention, even when no position information is recorded on the magnetic medium, the track is formed at a predetermined position on the magnetic medium.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a magnetic storage device 20 according to a first embodiment of the present invention will be described with reference to FIGS.

In FIG. 1, reference numeral 21 denotes a ceramic substrate.

Reference numeral 22 denotes a rectangular magnetic medium portion having a size of several mm on one side, which can be moved in the direction of arrow Y by an electrostatic motor 23.

Track position information is not recorded on the magnetic medium section 22.

Reference numeral 24 denotes a head support arm, the base side of which is fixed on the substrate 21 by a fixing portion 25 and extends in the Y direction.

The arm 24 has a slit 24a at the center, and the piezo elements 26 _-1 and 26 made of ZnO ₂ are provided along both sides.
_-2 is provided.

At the tip of the arm 24, a magnetic head 27 used for recording and a magnetoresistive element (hereinafter referred to as MR element) 28 used for reproduction are provided. The magnetic head 27 and the MR element 28 are extremely
2 attached.

Each component of the magnetic storage device 20 having the above configuration is produced by a micromachining technique using a thin film process, and the size of the device 20 is very small.

As shown in FIG. 2, the device 10 is incorporated in a housing 31 made of synthetic resin together with an LSI chip 32 to form a magnetic storage device assembly 30.

As shown in FIG. 1, the LSI chip 32 incorporates a signal processing circuit 33, a piezo element driving circuit 34, a motor driving circuit 35, and the like.

An upper surface of the housing 11 is covered with a lid (not shown), and a lead 36 projects from a side surface of the housing 11.

This assembly 30 is a general package LS
It is handled in the same way as I, the lead 36 is soldered,
Mounted on a printed board.

Next, the operation of the magnetic storage device 20 will be described.

In FIG. 1, the drive circuits 34 and 35 are both independent of the signal processing circuit 33 and merely generate a sine wave signal as described later.

The synchronization signal 41 shown in FIG. 3A is applied to the drive circuits 34 and 35 through the terminal 40, and the drive circuits 34 and 35 operate.

The driving circuit 34 is a piezo element driving signal 4 which is a sine wave synchronized with the synchronizing signal 41 shown in FIG.
2 is output.

As a result, the piezo elements 26 _-1 and 26 _-2 are driven, the arm 24 is bent in the direction of the arrow X, and the head 27 is moved to a position of, for example, several k as indicated by reference numeral 43 in FIG.
Single vibration at Hz.

The drive circuit 35 outputs an electrostatic motor drive signal 44 which is a sine wave synchronized with the synchronization signal 41 shown in FIG.

As a result, the electrostatic motor 23 is driven, and the magnetic medium portion 22 is moved in the direction of arrow Y in synchronization with the simple vibration 43 as indicated by reference numeral 45 in FIG.
Oscillates simply at 0 Hz.

Here, the period T ₁ of the simple vibration 43 and the simple vibration 4
The period T _{2 of} 5 is set so that T ₁ / T ₂ is, for example, 150. Note that T ₁ / T ₂ may be 100 times or more.

Further, apparatus 20 performs recording and reproducing in the process of the head 27 and MR element 28 is displaced in the direction of arrow X _1, configured so nothing is done in the process of displacing the direction of arrow X ₂ is there.

Firstly, the magnetic medium 22 will be described operation in the forward process of moving in the arrow Y ₁ direction.

[0039] This process is a process S ₁ to move the magnetic medium 22 is its end to the position P ₂ in FIG. 1 in position P ₁ in the arrow Y ₁ direction (see FIG. 4 (B) refer).

The head 27 (MR element 28) is shown in FIG.
As shown in (A), the magnetic medium 22 starts moving from the start point 50, scans in a zigzag manner as indicated by reference numeral 60 while turning back at points 51 → 52 →.
It reaches 8.

Next, the magnetic medium section 22 reaches the position P ₂ ,
The operation in the return path process S ₂ (see FIG. 4B) that returns and moves in the direction of the arrow Y ₂ will be described.

The head 27 (MR element 28) is shown in FIG.
As shown by reference numeral 61 in (B), the movement starts from the end point 58, scans in a zigzag manner while turning back at points 57a → 56a → 55a... → 51a, and reaches a point 50a.

Here, since the simple oscillation of the head 27 and the simple oscillation of the magnetic medium section 22 are synchronized, the turning points 51a to 57a coincide with the turning points 51 to 57. In addition, the point 50a and the point 50 also match.

Therefore, the trajectory 61 is the same as the trajectory 6
Overlap with 0.

Therefore, the magnetic head 27 (MR element 28)
Scans the magnetic medium portion 22 so as to trace the trajectory 60 in the backward path.

Also, during the return path, the head 27
Are the tracks 65 _-1 , 6 indicated by solid lines in FIG.
5 _-2 , 65 _-3 , and 65 _-4 are formed.
The input information is recorded. In FIG. 5A, the dashed line is the return trajectory of the head 27. In this process, no signal is sent to the head 27 and no track is formed.

In the forward path, the head 27 _moves the tracks 65 _-5 , 65 _-6 , 6 indicated by solid lines in FIG.
5 _-7 , 65 _-8 where information is recorded. FIG.
In (B), the dashed line is the locus of return of the head 27. In this process, no signal is sent to the head 27 and no track is formed.

As a result, the magnetic medium section 22 has the structure shown in FIG.
As shown in (C), a track pattern 66 in which the tracks 65 _{-1 to} 65 _-8 form a zigzag shape is formed.

Since the simple vibration of the head 27 and the simple vibration of the magnetic medium unit 22 are synchronized, the tracks 65 _{-1 to} 65 _-1
5-8 are formed at the same site. Therefore, the magnetic medium unit 2
It is not necessary to record the track position information on the disc 2 in advance, and it is not necessary to reproduce the track position information and control the position of the magnetic medium unit 22 based on the track position information. It is simpler than the device.

In FIG. 5C, the ends of the tracks adjacent in the Y direction overlap each other.

[0051] Therefore, as shown in FIG. 6, for example 65 _-2
Looking at the tracks indicated by 65 and _-8 ,
_{For -8} , the end is not used. Code 6
7 is an unused portion.

[0052] During reproduction, MR element 28 is scanned to follow the track 65 _-1 to 65 _-8, and reproducing a signal only in the process of moving in the arrow X ₁ direction. The reproduced signal is taken out from the terminal 38 in FIG.

Next, a magnetic storage device 20A according to a second embodiment of the present invention will be described with reference to FIG.

In FIG. 7, portions corresponding to the components shown in FIG. 1 are denoted by the same reference numerals.

The magnetic medium section 22 is fixed on the substrate 21.

Instead, an electrostatic motor 70 is provided below the fixed portion 25 of the arm 24.

The motor 70 is the same as the electrostatic motor 2 shown in FIG.
3 is driven in the same manner.

Thus, the arm 24 is connected to the piezo element 2
_6-1 and _26-2 cause a simple vibration at several kHz in the X direction and a single vibration at several tens Hz in the Y direction by the motor 70.

The two simple vibrations are performed synchronously, and the tracks are formed in the magnetic medium portion 22 in a zigzag manner as in the case of the above embodiment.

Next, a magnetic storage device 20B according to a third embodiment of the present invention will be described with reference to FIG.

In FIG. 8, portions substantially corresponding to the components shown in FIG. 1 are denoted by the same reference numerals.

In this embodiment, the storage capacity is increased under the constraint that the amplitude of the simple vibration of the arm 24 is as small as several hundreds of μm.

The magnetic medium 22 has a plurality of data cells 80.

An electrostatic motor 81 for moving the fixed portion 25 of the arm 24 in the direction of the arrow X is provided.

The operation of the device 20B will be described.

First, a data cell to be recorded or reproduced, for example, _80-1 is selected.

The motor drive circuits 86 and 87 operate according to the signal from the data cell designation circuit 85, and the electrostatic motors 81 and 23 are driven by the drive signals.

When the electrostatic motor 81 is driven, the fixing unit 2
5 is roughly moved, and the arm 24 is moved in the arrow X direction.

When another electrostatic motor 23 is driven, the magnetic medium portion 22 is roughly moved in the direction of arrow X.

Thus, the magnetic head 27 (MR element 2)
8) and the target data cell 80-1 _{face each} other.

[0071] As with the first embodiment of the after this the arm 24 (the magnetic head 27) and the magnetic medium 22 and is simple harmonic motion in synchronism, the data cell 80 _-1 zigzag track formation The information is recorded.

[0072]

As described above, according to the first aspect of the present invention, it is sufficient to only operate the head simple vibration means and the magnetic medium unit simple vibration means in synchronization with each other. It is easier to control than a method of recording in advance, forming a track while reading the position information and confirming the position, and recording the information here. In view of the fact that recording and reading of position information tends to be difficult when the size is reduced, it is advantageous that control can be performed without position information.

According to the second aspect of the present invention, similarly to the first aspect of the present invention, a track can be formed at a predetermined position on a magnetic medium without positional information being formed for each track on the magnetic medium. Therefore, control can be facilitated.

[Brief description of the drawings]

FIG. 1 is a perspective view of a magnetic storage device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a magnetic storage device assembly in which the magnetic storage device of FIG. 1 is incorporated.

FIG. 3 is a waveform diagram of a signal of each unit in FIG.

FIG. 4 is a diagram showing a simple vibration of a magnetic head and a magnetic medium unit in FIG. 1;

FIG. 5 is a diagram illustrating formation of a track on a magnetic medium unit.

FIG. 6 is an enlarged view showing an end portion where tracks overlap in FIG. 5 (C).

FIG. 7 is a perspective view of a magnetic storage device according to a second embodiment of the present invention.

FIG. 8 is a perspective view of a magnetic storage device according to a third embodiment of the present invention.

FIG. 9 is a diagram showing a magnetic storage device of the prior application.

[Explanation of symbols]

20 magnetic storage device 21 ceramic substrate 22 rectangular magnetic medium portion 23,70,81 electrostatic motor 24 the head support arm 24a slit 25 fixed part 26 _-1, 26 _-2 piezoelectric element 27 a magnetic head 28 magnetoresistive element ( MR element) 30 magnetic storage device assembly 31 housing 32 LSI chip 33 signal processing circuit 34 piezo element driving circuit 35, 86, 87 motor driving circuit 36 lead 37 recording signal input terminal 38 reproduction signal output terminal 40 terminal 41 synchronization signal 42 piezo element drive signal (sine wave) 43 single vibration 44 an electrostatic motor drive signal harmonic oscillation 50 starting 51 to 57 fold point 58 the end point 60, 61 head of the trajectory 65 _-1 (sinusoidal) 45 magnetic medium 22 of the head 27, 65 _-8 track 66 track pattern 67 unused portion 80 data Le 85 data cells specified circuit

Claims (2)

(57) [Claims] 1. A magnetic medium section (22), a head (27) in contact with the magnetic medium section, and a head having a first period (T₁Single head vibrating with)
Vibration means (24, 26 _-1, 26_-2, 34), and the magnetic medium portion is perpendicular to the direction of the simple vibration of the head.
In the same direction as the simple vibration of the head, and
Magnetic medium for simple oscillation at a second period larger than one period
And a single unit vibration means (23, 35)
A magnetic storage device characterized by the above-mentioned. 2. A magnetic medium section (22), a head (27) in contact with the magnetic medium section, and a first period (T₁Single head vibrating with)
Vibration means (24, 26 _-1, 26_-2, 34), and the head simple vibration means is connected to a direction orthogonal to the direction of the simple vibration.
In the same direction as the simple vibration of the head and the first
The second period (T_TwoSimple vibration with simple vibration
Moving means (70, 35)
Magnetic storage device.