JPH03225688A - Magnetic storage device - Google Patents

Abstract

PURPOSE:To perform access at high speed with simple configuration by providing a rotating means and a linear moving means for a magnetic head and executing circular-arc-shaped motion with a fixed radius and movement in a rotational radial direction. CONSTITUTION:A fixed rotary motor 10 for rotating the magnetic head is installed on a mobile table 12 loaded on a fixed base 11 so as to be slid. A rotary driving shaft 10 is fitted into a rotary shaft 5 and linked so as not to be relatively turned, and magnetic heads 4A and 4C are rotated through the rotary shaft 5 and a head supporting arm 6. A circular-arc-shaped track with fixed radius, is drawn along the magnetic storing surface of a storing medium 2. Further, the mobile table 12 is energized by a spring engaged between the left end part and the base 11, and each time the motor 10 rotates the rotary shaft 5 by 1/4 rotation, the heads are relatively and linearly moved in the rotational radial direction by a pulse motor 14. Thus, by using a light magnetic cartridge 1, magnetic storing surfaces 2a and 2b can be simultaneously accessed at high speed by the plural heads 4A and 4C without rotating the medium 2.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a magnetic storage cartridge in which a case houses a magnetic storage medium and a magnetic head for writing and storing various information on the medium or for reading the stored information. Regarding the magnetic storage device used.

[Summary of the invention]

In this invention, a magnetic storage cartridge containing a non-rotating magnetic storage medium and a rotatable magnetic spatula 1- is installed in a case, and the magnetic head is moved to draw an arc-shaped trajectory with respect to the magnetic storage medium. While rotating at a constant speed, the axis of rotation of the magnetic head is moved linearly relative to the magnetic storage medium in the radial direction of rotation of the magnetic head. The present invention provides a magnetic storage device whose storage density and force do not change.

[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 magnetic disk such as a floppy disk or a 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. Information is written or read by tracing concentric tracks formed on the recording surface of the disc.

Further, the above-mentioned points are also the same in a magnetic storage device that uses a magnetic storage cartridge containing a magnetic disk inside a case.

[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 trunk. Since the relative circumferential velocity between the magnetic storage medium and the magnetic head also differs from track to track, there is a problem in that the floating amount of the magnetic head and the output during reading also vary from track to track. Ta.

Furthermore, since a heavy magnetic disk is rotated, the drive mechanism becomes large, and there is also the problem that startup time, that is, access is slow.

This invention was made to solve these problems, and the information storage density, the flying height of the magnetic head, and the readout output are the same on every track on the magnetic storage medium, and the structure is simple. The purpose is to provide a magnetic storage device with quick access at low cost.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a magnetic storage cartridge in which a non-rotating magnetic storage medium and a rotatable magnetic head for at least one of reading and writing information to and from the magnetic storage medium are built into a case. A removably mounted magnetic storage device comprising: a magnetic head rotation means for rotationally driving the magnetic head so as to draw an arcuate locus of a constant radius along a magnetic storage surface of a magnetic storage medium; The present invention provides a magnetic storage device including linear movement means for linearly moving a rotation axis relative to a magnetic storage medium in a rotation radius direction of a magnetic head.

[For production]

The magnetic storage device according to the present invention rotates the magnetic head in the magnetic storage cartridge so as to draw an arcuate trajectory along the storage surface of the magnetic storage medium, and moves the magnetic head toward the magnetic storage medium in the radial direction of the rotation. Information is written or read on an arcuate track having the same radius by linearly moving the track relative to the track.

Therefore, since the relative velocity with respect to the magnetic field and the rad is constant in any track of the magnetic card, the information storage density, the flying height of the head, and the output during reading are also constant.

Since the magnetic storage medium in the magnetic storage cartridge does not rotate, but instead rotates a light magnetic head built into the cartridge, the drive mechanism is not only simpler and more compact, but also faster to access.

〔Example〕

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

FIG. 2 is a bottom view showing an example of a magnetic storage cartridge used in the magnetic storage device according to the present invention, and FIG. 1 is a cross-sectional view taken along the line ■-■ along with the magnetic head drive mechanism on the device main body side. It is.

This magnetic storage cartridge 1 consists of a magnetic storage medium 2 formed of resin or the like in a rectangular shape, a case 3 made of transparent resin that tightly fits around the lower surface of the magnetic storage medium 2, and a magnetic head assembly 4 housed inside the case 3. ing.

The magnetic storage medium 2 has a pair of magnetic storage surfaces 2a and 2b coated with a magnetic material on both left and right sides of its lower surface.
is formed.

The magnetic head assembly 4 supports four magnetic heads 4A to 4D for writing and reading information to and from the magnetic storage medium 2 using four slightly elastic head support arms attached in a cross shape around the outer periphery of rotation #I5. 6 are fixed upwardly at each tip. Therefore, the four magnetic heads 4A to 4D are arranged at 90° intervals on the same circumference.

An elongated opening 3a is provided in the center of the case B along the longitudinal direction, and the rotating shaft 5 of the magnetic head assembly 4 is inserted into the opening 3a from the position A to the position B shown in FIG. It is designed to be able to move in a straight line in the direction of arrow P.

And this opening 3. i is made of a flexible resin sheet or the like with slits formed in the direction of arrow P to allow movement of the rotating shaft 5 and cover other parts to prevent dust from entering the case 3. A sexual cover 7 is provided.

In the magnetic head parking mechanism on the apparatus main body side shown in FIG. 1, 10 is a constant rotation motor for rotating the magnetic head, and a movable base 1 is placed on a fixed base 11 so as to be slidable in the direction of the arrow.
The rotational drive shaft 10a is fitted into and connected to the rotational shaft 5 in a relatively unrotatable manner, and each magnetic head 4A to 4D is connected to the second
Rotate in the direction of arrow Q in the figure.

Further, the movable table 12 is biased toward the left side in FIG. 1 by a spring 13 engaged between its left end and the heath 11, and is biased toward the rotator 15 fixed to the rotation drive shaft 14a of the pulse motor 14 at its right end. A bunt 16 to be wound is attached, and every time the motor 10 rotates the rotating shaft 5 by 1/4, the pulse motor 14 moves the band at a predetermined pitch in the direction of the arrow (corresponding to the track pitch on the magnetic storage surfaces 2a and 2b). It is designed to be moved by

In addition, the rotor side 2 of the rotary transformer 20 is attached to the one-rotation shaft 5.
0a is attached to the motor 10, and a stator side 20b is attached to the motor 10 through the rotation drive shaft 10a, and the rotation shaft 5 of the magnetic head assembly 4 and the motor 1
When the rotary drive shaft 10a of 0 is connected, the 4 that rotates
Signals are exchanged between the magnetic heads 4A to 4D and the writing/reading device side by means of the rotary transformer 20 in a non-contact manner.

According to this embodiment configured as described above, when the magnetic storage cartridge 1 is installed in the main body of the apparatus, the magnetic spatula 1
The rotating shaft 5 of the assembly 4 is connected to the motor 10 on the device main body side.
The rotary drive shaft 10a is fitted and connected to the rotary drive shaft 10a.

Then, when the motor 10 is started, the four magnetic heads 4A to 4D of the magnetic head assembly 4 are rotated at a high speed at a constant speed, and each magnetic storage surface 2a of the magnetic storage medium 2,
2b while drawing an arc-shaped trajectory with a constant radius.

On the other hand, every time the magnetic head assembly 4 rotates 1/4, the step motor 14 moves the motor 10 and the magnetic head assembly 4 connected thereto linearly in the direction of arrow P at a pitch corresponding to the track interval. Therefore, the magnetic heald assembly 4 moves from the position shown by the solid line in FIG. 2 to the position shown by the imaginary line.

As a result, the magnetic heads 4A to 4D are connected to the magnetic storage medium 2.
By sequentially tracing arcuate tracks of the same radius formed by a predetermined pinch in the shaded areas in FIG. 2 of the magnetic storage surfaces 2a and 2b, four Information can be written to or read from the book tracks.

The magnetic heads 4A to 4D are, for example, thin film heads and are formed hydrodynamically, and generate buoyancy depending on the circumferential speed. The floating tension varies from 0 to 0 depending on the circumferential speed due to the balance between the buoyancy of the head itself and the suppressing force of the head support arm 6.
Maintain a constant height of about 3 to 0.5 μm.

The track pitch can be, for example, 12 μm, and the rotation speed of the motor 10 can be, for example, about 3600 rpm.

Note that the motor 10 is fixed and the magnetic storage cartridge 1 is
The magnetic storage surfaces 2a, 2b of the magnetic storage medium 2 and the magnetic heads 4A to 4D may be moved linearly relative to each other by linearly moving to the left in the figure.

The rotary transformer 20 consists of a rotor side 20a and a stator side 20b, each of which has a disk-shaped outer shape, and the rotor side 20a has four coils L1 concentrically arranged in a ring shape as shown in FIG.
~L4 is wound, and four coils L5~L8 are also wound at corresponding positions on the stator side 20b.

FIG. 3 is a wiring diagram showing the connection relationship between each coil of the rotary transformer 20, each magnetic head, and a switching circuit.

Coils L1 and LS of this rotary transformer 20.

L2, L6+L3, L7+, and L4 and LS each act as a separate transformer, and by matching the inductances, the Talostalk between channels can be reduced to about 30 db, and signals can be separated with almost no problems.

However, when crosstalk requirements are severe, magnetic separation can be ensured by inserting a short ring between each ring-shaped coil.

The windings of the magnetic heads 4A to 4D are connected to the coils L1 to L4 on the rotor side 20a of the rotary transformer 20, respectively, and the coils L5 to L8 on the stator side 2Db are connected in common only on the common side, and each switching circuit is connected. Connected to 21.

Then, in response to a head switching signal generated every 1/4 rotation of the magnetic head assembly 4 by the motor 10, the switching circuit 21 sequentially switches the coils corresponding to the magnetic heads that scan the magnetic storage surface 2a of the magnetic recording medium 2 to the signal line S1. To,
Coils corresponding to the magnetic heads that scan the magnetic storage surface 2b are respectively connected to the signal line s2.

Therefore, information from the signal line S1 is transferred to the magnetic storage surface 2.
It is possible to write information on the magnetic storage surface 2a or read information stored on the magnetic storage surface 2a and output it to the signal line S1. Similarly, information from the signal line S2 can be written on the magnetic storage surface 2b or information stored on the magnetic storage surface 2a can be outputted to the signal line S1. The information stored in can be read out and output to the signal line S2.

According to this embodiment, the magnetic storage cartridge 1 can be made thin and compact, and since the magnetic storage medium 2 is not rotated but a light magnetic head is rotated, startup, that is, access at the time of startup is quick.

In addition, since the trunks of the magnetic storage surfaces 2a and 2b of the magnetic storage medium 2 all have the same length, the storage density can be kept constant, and the relative speed of each magnetic head 4A to 4D with respect to the magnetic storage medium 2 Since this is constant in every track, the flying height of the magnetic head and the output during reading are always constant.

Furthermore, since a flexible cover is provided on the opening d of the case B for moving the rotating shaft 5 of the magnetic spatula 1-assembly 4, it is possible to prevent dirt and dust from entering through there, and the storage data can be reliability can be increased.

Note that the magnetic storage medium 2 includes a pair of magnetic storage surfaces 2a.

2b and four magnetic heads 4A to 4D arranged at 90' intervals are simultaneously rotated so that two of the magnetic heads can simultaneously access the magnetic storage surfaces 2a and 2b. Good intrusion and readout efficiency.

〔Effect of the invention〕

As explained above, the magnetic storage device according to the present invention uses a compact and lightweight magnetic storage cartridge,
The magnetic storage medium does not rotate, but rotates a light head, so access is quick, information storage density is high, and the head size is 4.
The amount of data and the output during reading do not change even if the magnetic storage surface is tracked.

Moreover, since the structure is simple, it can be provided at low cost.

[Brief explanation of drawings]

1 is a cross-sectional view taken along the line ■-■ in FIG. 2 together with the active mechanism of the magnetic head; FIG. 2 is a bottom view showing an example of a magnetic storage cartridge used in a magnetic storage device according to the present invention; FIG. 3 is a wiring diagram showing the connection relationship between each coil of the rotary transformer 20, each magnetic head, and the switching circuit. 1...Magnetic storage cartridge 2...Magnetic storage medium 2a, 2b...Magnetic storage surface 3...Case 3a1. Opening 4...Magnetic head assembly 4A, 4B, 4G, 4D...Magnetic head 5...Rotating shaft 6-Head support arm 7-Cover
10... Constant rotation motor 11 ・Base
12...Moving table 13...Spring 14...
Pulse motor 15...Rotor 16...Band 20/Rotary transformer 20a...Rotor side 20b...Stator side 1 Switching circuit

Claims (1)

[Scope of Claims] 1. A magnetic storage cartridge that includes a non-rotating magnetic storage medium and a rotatable magnetic head that performs at least one of writing and reading information to and from the magnetic storage medium built into a case is removably attached. A magnetic storage device comprising: magnetic head rotation means for rotationally driving the magnetic head so as to draw an arcuate locus of a constant radius along the magnetic storage surface of the magnetic storage medium; and a rotation axis of the magnetic head. A magnetic storage device comprising: linear movement means for linearly moving a magnetic head relative to the magnetic storage medium in a rotation radius direction.