JPH0476810A - Magnetic recording device - Google Patents

Abstract

PURPOSE:To shorten rising time, to improve recording density and to effectively utilize recording areas with simple configuration by writing and reading a data to a first magnetic recording medium based on a clock signal written in a second magnetic recording medium. CONSTITUTION:For recording, respective heads 5a-5d are moved along a circular track Q and the clock signal is read into a fixed magnetic recording medium 6. Next, a data is supplied to a head counter to a recording medium 1 synchronously with the clock signal and the data is recorded in recording areas D and D'. The data is recorded to a movable magnetic recording medium 11 by a rotary head 15 as well. For reading, the clock signal is read from a clock area, and the data recorded in the recording areas D and D' by the head counter to the recording medium 1 synchronously with the clock signal is read. The data is read from the recording medium 11 as well. In this case, since the clock area can be made extremely small to the data area, the recording density of the data can be sharply improved. Further, since the head light in weight is rotated, rising time is shortened as well.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a magnetic recording device suitable for use in recording information on a planar magnetic recording medium.

"Prior Art" A magnetic disk is generally used as a conventional planar magnetic recording medium. As is well known, a magnetic disk is made by applying a magnetic film to the surface of a disc-shaped magnetic disk substrate, and is driven to rotate when recording/reproducing information, and information is transferred through a head that is movable in the radial direction. This is where input and output are performed.

"Problem to be Solved by the Invention" By the way, in conventional magnetic disks, it is necessary to rotate the heavy magnetic disk at high speed.
There was a problem in that the rise time until constant speed rotation became longer and the power consumption increased. In addition, because the recording tracks are arranged in the circumferential direction, the recording density on the inner tracks is high, making it more likely to cause errors, while the data density on the outer periphery is low, making it impossible to use the recording area effectively. There was a problem. In addition, since the orbiting speed of the head becomes slower in the inner track, the flying state of the head is different from that of the outer track, which requires correction in signal processing and complicates the drive mechanism of the head.

Furthermore, since it is necessary to multiplex clock signals when recording data on a magnetic disk, the configuration of the data recording and reproducing circuit becomes complicated, and the data recording density decreases by the amount required to record the clock signal. There was also the problem of doing so.

The present invention has been made in view of the above-mentioned circumstances, and has a short rise time, low power consumption, high recording density, constant error rate, and can effectively utilize the recording area. The object of the present invention is to provide a magnetic recording device that can be realized with a simple configuration.

"Means for Solving the Problems" In order to solve the above problems, the present invention includes a magnetic head that rotates along a predetermined circular orbit, and a magnetic head that is arranged close to the circular orbit and has a distance from the circular orbit. a first magnetic recording medium which is movable in a predetermined direction while holding a first magnetic recording medium;
The magnetic recording medium is characterized by comprising a second magnetic recording medium which is arranged close to the circular orbit and whose position is fixed.

1 Effect: When a clock signal is recorded along a circular orbit on the second magnetic recording medium and the magnetic head is rotated, the clock signal is read out within the period when the magnetic head faces the second magnetic recording medium. be done. Next, when data synchronized with the clock signal is supplied to the magnetic head while the magnetic head faces the first magnetic recording medium, data is recorded along a circular orbit on the first magnetic recording medium. Ru. That is, a recording track is formed on the first magnetic recording medium along a circular orbit. Then, when the first magnetic recording medium is moved in a predetermined direction, recording tracks are sequentially formed along the predetermined direction.

"Example" Next, one embodiment of the present invention will be described with reference to the drawings.

A. Configuration of Example FIG. 1(A) is a plan view showing the configuration of an example of the present invention.
Figure (b) is its front view. In these figures 1
is a rectangular plate-shaped movable magnetic recording medium, the upper surface of which is coated with a magnetic film.
It is movable in the P' direction. Note that the illustrated state shows a state in which the movable magnetic recording medium 1 is located at the leftmost end.

Further, the horizontal drive mechanism 69 can have various configurations, but
For example, it may be a combination of a pulse motor and a gear, or a combination of a DC motor and a gear.

Next, in the center of the movable magnetic recording medium I, there is provided a substantially rectangular through hole 1a with long sides extending along the P-P' force direction.

Next, a motor 2 (servo motor for rotating the head) is fixed to the control circuit board 4, and its shaft 2 is inserted through the through hole 1a. 3 is a substantially cylindrical rotary transformer, which is composed of a primary side member 3a and a secondary side member 3b configured to be relatively rotatable along the circumferential direction;
Even during relative rotation, signal transmission between the primary and secondary sides is possible. - The next member 3a is formed into a cylindrical shape whose inner diameter is slightly larger than the diameter of the shaft 4, and the shaft 21 is inserted through the center thereof. Further, the secondary ω-shaped member 3b is formed into a cylindrical shape whose diameter is approximately equal to the outer diameter of the primary side member 3a. The center of the secondary member 3b is joined to the shaft 2a, and rotates together with the shaft 22L when the motor 2 is driven.

Next, 5 is a rotary head provided above the movable magnetic recording medium I, and a head support member 5 formed in a lattice shape.
e, and four heads 5i, sb, and 5c provided at each tip of the head support member 5e.

5d. The head support member 5e has its central portion fixed to the shaft 2a, and each head 5
i, 5b, 5c, and 5d are provided so as to face the upper surface of the magnetic recording medium l at a predetermined minute distance. Each head 5a, 5b, 5c, 5d has a shaft 2.
As the point a rotates, it moves along a circular orbit shown by Q in the diagram. Next, 6.6 is a rectangular fixed magnetic recording medium, which is provided so as to sandwich the movable magnetic recording medium I from the short side direction, and whose upper surface on which the magnetic film is formed is the same as the upper surface of the movable magnetic recording medium I. The motor 2 is arranged so as to be located on a plane.
The relative position is fixed so that it does not move.

Further, below the movable magnetic recording medium 1, a movable magnetic recording medium II, a rotary head 15, and a fixed magnetic recording medium 16.
and is provided.

B. Operation of the embodiment ■Recording operation Next, the recording operation according to this embodiment will be explained.

It is assumed that a clock signal is previously recorded along the circular orbit Q in the fixed magnetic recording medium 6.6 (at the time of disk formatting). Note that the portion where the clock signal is recorded is hereinafter referred to as a clock area.

First, when the motor 2 is rotated, each head 5a5b, 5
c and 5d move along the circular orbit Q.

At this time, a clock signal is read from the fixed magnetic recording media 6, 6, that is, the head facing the clock area.

Here, as shown in FIG. 1(a), the fixed magnetic recording medium 6
, 6 is made relatively narrow, the clock region also becomes small, so that the clock signal read therefrom is intermittent in bursts. In this case, the burst clock signal can be converted into a continuous clock signal by supplying it to, for example, a PLL circuit with a self-holding function (not shown). The continuous clock signal is then used as a timing reference for recording or reproducing data.

Next, when the movable magnetic recording medium 1 is moved in the P° force direction by the horizontal drive mechanism 69 and data is supplied in synchronization with the clock signal to the head facing the movable magnetic recording medium 1, the hatched area in the figure The data is recorded in D and D' (hereinafter referred to as recording areas). here,
When the driving speed of the horizontal drive mechanism 69 is kept constant, the recording density in the data area D' becomes constant. Then, when the movable magnetic recording medium 1 reaches the position indicated by R in the figure, the recording operation ends.

Note that also in the movable magnetic recording medium 11, the rotary head 1
5, data recording is performed in the same manner as above.

(2) Continuation operation Next, the operation for reading data written on the magnetic recording medium 1 by the above recording operation will be described.

First, when the motor 2 is rotated, each head 5a5b, 5
A clock signal is read out from the clock domain via c and 5d. Note that when the clock signal is intermittent, the clock signal is
Generate a continuous clock signal.

Next, when the movable magnetic recording medium I is moved in the P direction by the horizontal drive mechanism 69 and data is read out in synchronization with the clock signal via the head facing the movable magnetic recording medium I, the recording area is The data recorded in ' is read out.

Note that also in the movable magnetic recording medium 11, the rotary head 1
5, data reading is performed in the same manner as above.

In this way, in this embodiment, since the clock signal recorded on the fixed magnetic recording medium is used repeatedly, the clock area can be made extremely small compared to the data area, and the data recording density can be dramatically increased. It is possible to improve the Furthermore, since the movable magnetic recording medium 1 moves parallel to the circular orbit Q, it is possible to keep the data recording density constant. In addition, the lightweight heads 5a, 5b, 5
By rotating the motors c and 5cl, the rise time can be shortened and power consumption can also be reduced. Furthermore, since data and clock signals are recorded in separate areas, there is no need for a circuit to multiplex or separate them, and the floating state of the heads 5a, 5b, 5c, and 5d can be made constant in the entire data area. Therefore, the configuration of the recording and reproducing circuit can be simplified.

"Effect of the Invention J As explained above, according to the present invention, data can be written to the first magnetic recording medium and data can be continuously output based on the clock signal written to the second magnetic recording medium. , there is no need to multiplex a clock signal with the data recorded on the first recording medium, the recording area of the first magnetic recording medium can be used effectively, and the configuration of the recording/reproducing circuit is simplified. Furthermore, by keeping the magnetic/\foot rotational speed and the rotational speed of the first recording medium constant, the recording density in the first recording medium can be easily kept constant, so that the error rate can be reduced. can also be kept constant.

[Brief explanation of the drawing]

FIGS. 1A and 1B are a plan view and a front view of a magnetic recording device according to an embodiment of the present invention. 1...Movable magnetic recording medium (first magnetic recording medium)
, 5a 5b 5c, 5d... head (magnetic head), 6... fixed magnetic recording medium (second magnetic recording medium).

Claims (1)

[Scope of Claims] A magnetic head that rotates along a predetermined circular orbit, and a first magnetic head disposed close to the circular orbit and movable in a predetermined direction while maintaining a distance from the circular orbit. A magnetic recording device comprising: a magnetic recording medium; and a second magnetic recording medium disposed close to the circular orbit and having a fixed position.