JPH03224185A - Magnetic storage device - Google Patents

Abstract

PURPOSE:To make the storing density of information and the output thereof at a read-out time constant on every track by mutually, relatively and linearly moving a magnetic card and a magnetic head in the rotating radius direction of the magnetic head while the magnetic head is rotated at a fixed speed along the storage surface of the magnetic card. CONSTITUTION:The magnetic heads 2A - 2D are rotated at the fixed speed by a motor 3 and they successively travel along the storage surface 1a of the magnetic card 1 by drawing a circular arc-like locus having a fixed radius. On the other hand, the card 1 is linearly moved in the rotating radius directions of the heads 2A - 2D in a pitch corresponding to the interval of the track. Then, the information is written and read out. Therefore, the length of the track and the relative speed with respect to the heads 2A and 2D are made constant on every track arranged on the card 1. Thus, the storing density of the information and the output thereof at the read-out time are made constant.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic storage device that writes and stores various information on a magnetic storage medium and reads and uses the stored information.

[Summary of the invention]

This invention relates to a magnetic storage device that uses a magnetic card as a magnetic storage medium, in which a magnetic head rotates at a constant speed to draw an arcuate trajectory with a constant radius along the storage surface of the magnetic card. By configuring the magnetic head to move linearly relative to each other in the rotation radius direction of the magnetic head to write or read information, the length of any track arranged on the magnetic cart and the magnetic head can be adjusted. The relative speed with
The information storage density and readout output are made constant.

[Conventional technology]

Conventionally, floppy disk devices and hard disk devices have generally been used as this type of magnetic storage device.

In all of these magnetic storage devices, a floppy disk or hard disk, which is a circular magnetic storage medium, rotates at a constant speed, whereas a magnetic head moves linearly only in the radial direction of the disk, and the magnetic head is placed on the recording surface of the disk. Information is written or read by tracing concentric tracks.

[Problem to be solved by the invention]

However, in such conventional magnetic storage devices, the magnetic storage medium rotates as described above, and each track has a different diameter, so the information storage density is minimum on the outermost track and maximum on the innermost track. Since the relative circumferential speed between the magnetic storage medium and the magnetic head also differs from track to track, there is a problem in that the output during reading also changes from track to track.

Furthermore, since the magnetic storage medium is circular, it is inconvenient to carry and store.

The present invention was made to solve these problems, and provides a magnetic storage device in which the information storage density and readout output are the same for all tracks, and the magnetic storage medium is easy to carry and store. The purpose is to

[Means to solve the problem]

In order to achieve the above object, the present invention includes a magnetic card that is a card-shaped magnetic storage medium, a magnetic head that performs at least one of writing and reading information to and from the magnetic card, and a magnetic head that is a magnetic card. a magnetic head rotating means for rotating the magnetic head at a constant speed so as to draw an arcuate trajectory with a constant radius along the storage surface; and a means for linearly moving the magnetic card and the magnetic head relative to each other in the direction of the rotation radius of the magnetic head. A magnetic storage device is provided.

Note that it is desirable that the relative linear movement between the magnetic card and the magnetic head be performed in the direction of the rotation radius that bisects the arcuate locus that the magnetic head draws on the magnetic card.

Further, it is preferable that a plurality of magnetic heads are arranged at equal angular intervals on the same rotational circumference, supported integrally, and rotated by a common magnetic head rotation means.

Furthermore, it is preferable that the magnetic card is removable from the magnetic card support member of the magnetic storage device.

[For production]

In the magnetic storage device according to the present invention, while the magnetic head rotates at a constant speed so as to draw an arc-shaped trajectory with a constant radius along the storage surface of the magnetic card, the magnetic card and the magnetic head are rotated in the radial direction of the rotation of the magnetic head. are moved linearly relative to each other to write or read information.

Therefore, the length and relative speed with respect to the magnetic head of any track arranged on the magnetic card are constant, so that the information storage density and the readout output are also constant.

Tracks can be formed with the highest density if the relative linear movement between the magnetic card and the magnetic head is made in the direction of the rotation radius that bisects the arc-shaped locus that the magnetic head draws on the magnetic card. It is possible to increase the information storage capacity.

Furthermore, by arranging a plurality of magnetic heads on the same circumference at equal angular intervals and rotating them at the same speed, the plurality of magnetic heads sequentially write or read information to or from adjacent tracks of a magnetic card. Therefore, writing or reading can be performed efficiently.

If the magnetic card is made removable from the magnetic card support member of the magnetic storage device, the magnetic storage medium is in the form of a card, making it convenient to carry and store.

〔Example〕

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

FIG. 1 is a plan view showing a schematic configuration of an embodiment of the present invention.

Reference numeral 1 denotes a rectangular magnetic card which is a card-shaped magnetic storage medium, and the entire storage surface 1a or at least the track forming area indicated by diagonal lines in the figure is coated with a magnetic material.

2A to 2D are four magnetic heads for writing and reading information to and from the magnetic card 1, and a cross-shaped head support is fitted to the tip of the rotating shaft 3a of the magnetic head rotation motor 3 so as not to be relatively rotatable. Four radially extending slightly elastic arms 5A to 5D are attached to each tip of the member 4 and are arranged at 90' intervals.

The four magnetic heads 2A to 2D each have arms 5A to 2D.
5D, and is rotated by the motor 3 at a constant speed, and sequentially travels along the storage surface 1a of the magnetic distribution card 1 in an arcuate trajectory with a constant radius, and scans the arcuate track. .

On the other hand, every time the head support member 4 rotates 1/4, the magnetic card 1 is rotated in the radial direction of rotation, which divides the arcuate locus drawn by the magnetic heads 2A to 2D on the magnetic card 1 into three parts as indicated by arrow A. (in the direction in which the arm 5A extends in the illustrated state), it is moved linearly at a pitch corresponding to the track interval.

That is, the magnetic card 1 is initially at the position shown by the solid line in FIG. 1, and finally moves to the position shown by the imaginary line.

As a result, the magnetic heads 2A to 2D sequentially scan tracks 1 to n formed on the storage surface 1a of the magnetic card 1, and write or read information on the four tracks with one rotation of the head support member 4. can be done.

The magnetic heads 2A to 2D are, for example, thin film heads and are formed hydrodynamically, and generate buoyancy depending on the circumferential speed. The flying height is the buoyancy of the head itself and arms 5A~5
A constant height is maintained depending on the circumferential speed due to the balance with the holding force provided by D.

Here, numerical examples of the flying height d of the magnetic heads 2A to 2D, the track pitch p, and the rotation speed N of the motor 3 are as follows: d
= o, 5 μ p = 12 μN” 3600 rpm is possible.

FIGS. 2 and 3 show an example of a mechanism for linearly moving the magnetic card 1.

In either case, the magnetic card 1 is placed on a card support stand 11 that slides in the direction of arrow A by fitting into two guide rails 10. It is positioned and placed in a removable manner.

The example shown in FIG. 2 uses a rack and pinion mechanism, in which a rack part is formed on one side of the card support stand 11 parallel to the guide rail 10, and is fixed to the rotating shaft 15a of the pulse motor 13. It meshes with pinion 14.

In the example shown in FIG. 3, the low data 15 is attached to the rotating shaft 13a of the pulse motor 13, a band 16 is wound around it, and its tip is attached to one side of the card support 11 parallel to the guide rail 10 by a pin 17. At the same time, a coil spring is engaged between the pin 17 and the fixing portion to constantly urge the card support base 11 to the left in the figure.

In either of these mechanisms, each time the head support member rotates 1/4 by the motor 3 shown in FIG.
1, the magnetic card 1 can be linearly moved one pitch at a time corresponding to the track interval to the right in the figure.

Further, when returning the card support stand 11 and the magnetic card 1 to the initial position, the pulse motor 13 can be returned in a short time by continuously rotating the pulse motor 13 in reverse.

Note that since the magnetic heads 2A to 2D and the magnetic cart 1 only need to move linearly relative to each other, the magnetic card 1 is fixed and
The magnetic heads 2A to 2D are mounted on arms 5A to 5D and head support members 4. It is also possible to linearly move the magnetic card along with the motor 3 in the opposite direction to the above-mentioned magnetic card movement direction.

Figure 4 shows an example of how the rotary transformer is installed for contactless transmission and reception of signals between each magnetic head and the device fixed part side, and Figure 5 shows each coil of the rotary transformer and each FIG. 3 is a diagram showing an example of a connection circuit with a magnetic head.

As shown in FIG. 4, the rotary transformer 20 has a rotor side 20a and a stator side 20b, each having a disk-shaped outer shape.
It is composed of.

Then, the rotor side 20a is fixedly attached to the rotating shaft 3a of the motor 3 and the head support member 4, and the stator side 20a is attached to this.
0b are opposed to each other with a slight gap, and are fixed to a fixed base plate 1 to which the motor 3, the aforementioned guide rail 10, etc. are attached.

Four coils L1 to L4 are wound around the rotor side 20a concentrically with the rotating shaft 3a, and coils 5 to L8 are wound around the stator side 20b at corresponding positions, respectively.

These coils L1 and L5 + L2 and L6r
L a and L7 and L4 and L8 each act as separate transformers, and by matching the inductances, crosstalk between channels can be reduced to about 30 db, allowing signal separation with almost no problems. However, if crosstalk requirements are severe, magnetic separation can be ensured by inserting a short ring between each ring-shaped coil.

As shown in FIG.
Connect the 2D windings and connect each coil L5 on the stator side 20b.
~L8 are connected in parallel to each other to connect terminals T 1 y of the fixed part.
Derived to T2.

By doing so, when writing information to the magnetic card 1, by inputting a write signal from the terminal TIF T2 of the fixed part, each magnetic head 2A to 2D is written in a non-contact manner via each coil of the rotary transformer 20. The signal is similarly transmitted to the magnetic card 1, and when the magnetic heads 2A to 2D sequentially scan the magnetic card 1 by rotating the head support member 4 by the motor 3, it is possible to sequentially write on each track.

Furthermore, when reading information from the magnetic card 1, the signals read when the magnetic heads 2A to 2D' sequentially scan the magnetic card 1 are transmitted to the rotor side 2 of the rotary transformer 20.
It is transmitted sequentially from the coils L1 to L4 on the stator side 20b to the coils L5 to L8 on the stator side 20b, and is sequentially transmitted to the terminal T.
1 y T Output from 2.

According to the embodiment described above, the magnetic heads 2A to 2D rotate at a constant speed, but the radius of rotation is always constant, so that they can be The relative velocity (linear velocity) during scanning is constant.

Therefore, the recording density is the same for all tracks,
The output when reading is also the same.

Since four magnetic heads are provided, each track of the magnetic card 1 can be scanned almost continuously most efficiently, and the access speed can be maximized. but.

The number of magnetic heads is not limited to four, but at least one.
It is sufficient to have 2 or 3, but the access speed can be increased by increasing the number to 2 or 3.

Also, since there is no need to rotate something heavy like a hard disk, startup is quick. Furthermore, since the magnetic head rotation motor is small, it saves power and is convenient to be built into portable equipment.

Since the removable magnetic recording medium is in the form of a card, it is convenient to carry and store.

In addition, the magnetic card is placed at a position symmetrical to the illustrated magnetic card 1 with respect to the rotating shaft 3a in FIG. 1 (on the left side in FIG. By scanning two magnetic cards, the storage capacity can be doubled. Alternatively, both sides of the magnetic card may be used.

〔Effect of the invention〕

As explained above, in the magnetic storage device according to the present invention, the length of each track on the magnetic card and the relative speed with respect to the magnetic head are constant, so that the information storage density and the readout output are constant.

Tracks can be formed with the highest density if the relative linear movement between the magnetic card and the magnetic head is made in the direction of the rotation radius that bisects the arc-shaped locus that the magnetic head draws on the magnetic card. It is possible to increase the information storage capacity.

Furthermore, by arranging a plurality of magnetic heads on the same circumference at equal angular intervals and rotating them at the same speed, the plurality of magnetic heads sequentially write or read information to or from adjacent tracks of a magnetic card. Therefore, writing or reading can be performed efficiently and access speed can be increased.

Furthermore, since the magnetic storage medium is a magnetic card that can be attached to and removed from the device, it is convenient to carry and store.

[Brief explanation of drawings]

FIG. 1 is a plan view showing a schematic configuration of an embodiment of the present invention, FIGS. 2 and 3 are plan views showing different examples of the linear movement mechanism of the magnetic card, and FIG. FIG. 5 is a partially sectional enlarged side view of the main part of the rotary transformer in the embodiment, and FIG. 5 is a wiring diagram showing the connection between each coil of the rotary transformer and each magnetic head. 1...Magnetic card 1a...Storage surface 2A-2
D...Magnetic head 3...Motor for magnetic head rotation 4...Head support member 5A to 5D...Support arm 10...Guide rail 11...Card support stand 12...Positioning pin 13...Pulse motor 2
0...Rotary transformer

Claims (1)

[Scope of Claims] 1. A magnetic card that is a card-shaped magnetic storage medium, a magnetic head that performs at least one of writing and reading information to and from the magnetic card, and a magnetic head that is attached to the storage surface of the magnetic card. a magnetic head rotating means for rotating the magnetic head at a constant speed so as to draw an arcuate trajectory with a constant radius along the magnetic head; and a means for linearly moving the magnetic card and the magnetic head relative to each other in a direction of the rotation radius of the magnetic head. A magnetic storage device comprising: 2. The magnetic storage device according to claim 1, wherein the relative linear movement of the magnetic card and the magnetic head is performed in a direction of a rotation radius that bisects an arcuate locus that the magnetic head draws on the magnetic card. A magnetic storage device characterized by: 3. The magnetic storage device according to claim 1 or 2, wherein a plurality of magnetic heads are arranged at equal angular intervals on the same circumference and supported integrally, and are rotated by a common magnetic head rotation means. A magnetic storage device characterized by: 4. The magnetic storage device according to claim 1, wherein the magnetic card is removable from its support member.