JPS61204863A - Disc-shaped magnetic sheet device - Google Patents

Abstract

PURPOSE:To attain always proper abutting between a magnetic sheet and a magnetic head by moving the magnetic head to the outside of plural tracks at the eject time. CONSTITUTION:A magnetic head 2 is placed on an unused area of a magnetic sheet, and thereby, the magnetic sheet 1 is not deformed in used areas, and stable contacting between the magnetic head 2 and the magnetic sheet 1 is always attained in used areas of the magnetic sheet 1. When the magnetic head 2 is moved during rotation of the magnetic sheet 1, the magnetic sheet 1 is not damaged at all because the magnetic head 2 is moved in the good abutting state. If the position of a detector 11 is defined as a reference track position, the magnetic head 2 is moved inward on the outside of the outermost track and is moved outward again to stop the magnetic head 2 in the reference track position by the signal of the detector 11 when the magnetic sheet 1 is set to a device newly. Thus, track traversing and the track position are controlled easily.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an apparatus for recording and reproducing a plurality of tracks on a disk-shaped magnetic sheet.

2. Description of the Related Art As a conventional disc-shaped magnetic sheet device, there is a device such as a VSR (video sheet recorder) as shown in FIG.

1 is a magnetic seam formed with a plurality of video tracks 1, 2
Reference numeral 4 indicates a magnetic head that obtains a reproduction signal from a magnetic sheet, 3 a motor that rotates the magnetic sheet at a constant speed, 4 a stabilizing plate that stably rotates the magnetic sheet, and 5 a jig for attaching a magnetic head.

Reference numeral 6 denotes a mover for moving the magnetic head 2 in the radial direction of the magnetons-1.1.

In the various devices described above, the magnetic sheet 1 and the magnetic head 2 are in very strong contact. The various devices described above are configured so that when the magnetic sheet 1 is ejected and the device is stopped at 11 o'clock, the motor 3 is stopped at the track position where recording and reproduction is being performed, and the magnetic sheet 1 is ejected and the device is stopped. .

Problems to be solved by the invention (1) However, in the above configuration, since the discharge and the device are stopped after the motor 3 is stopped, for example, if the discharge is not performed or if the motor 3 is stopped, In particular, since the contact between the magnetic head 2 and the magnetic sheet 1 becomes strong, the shape of the magnetic sheet 1 on the track that the magnetic head 2 is in contact with changes, making it impossible to obtain normal contact.

Furthermore, if the track being played back is scratched and the magnetic layer is peeling off, if the rotation of the motor 3 is stopped while the motor 3 is on track, magnetic particles will adhere to the magnetic head 2. . In some cases, the magnetic layer is completely covered. If other tracks are reproduced with the magnetic head 2 in such a state, the other tracks may be damaged and their lifespan may be shortened.

Furthermore, in the case of an electronic still camera system, since a pad is used to bring the magnetic head and the magnetic sheet into contact, there is a problem similar to that mentioned above.

In view of the above, the present invention provides a disc-shaped magnetic sheet 1 and a device that eliminates deformation and damage to the magnetic sheet when the magnetic sheet and magnetic head are stopped, and always ensures proper contact between the magnetic head and the magnetic sheet. It is.

Means for Solving the Problems The present invention provides that the magnetic sheet rotates 5'- when the magnetic sheet is ejected.
- This is a disc-shaped magnetic sheet device configured to move the middle magnetic head out of multiple tracks, stop the motor after the movement is completed, and eject the magnetic sheet I.

Operation The present invention uses the above-mentioned configuration (j) to move the magnetic head out of a plurality of tracks at the time of ejection, so that appropriate contact between the magnetic sheet and the magnetic head can always be obtained.

Embodiment An embodiment of the present invention is shown in FIGS. 1, 2, and 3. In FIG. 1, reference numeral 1 is a motor controller that controls the rotation of the motor, 8 is a key operation unit that performs head movement and eject operation, 9 is a controller that controls head movement and motor start/stop, etc.; A reproduction processor processes the reproduction signal from the magnetic head 2, a detector 11 detects that the magnetic head 2 is positioned on the outer side of the outermost I/rack of the magnetic sheet, and 12 attaches and detaches the magnetic sheet 1. It is a detachable device.

The disk-shaped magnetic six-page sheet device of this embodiment constructed as above will be described below.

When the magnetic head 2 performs an eject operation as shown in FIG. 2a from the key operation unit 8 during reproduction on a predetermined track, the controller 9 sends an outer circumferential direction movement command as shown in b to the head mover 6. . In response to this command, the head mover 6 moves the magnetic head 2 in the direction of the outer circumference of the magnetic sheet 1. Therefore, the detector 1 is installed at a position where the magnetic head 2 does not on-track from the outermost track position of the magnetic sheet 1''2.
1 detects the magnetic head 2, the detector 11 detects the magnetic head 2.
Against 1. It sends out a detection signal like c. Controller 9
stops the movement of the head mover 6, and sends a motor stop command like d to the motor controller 7.

Next, the motor controller 7 sends a motor stop detection signal e to the controller 9. After a predetermined period of time, the controller 9 sends attachment/detachment commands such as l to f to the sharpener 12. The reason why the attachment/detachment command is sent to the attachment/detachment device after a predetermined time is that it is extremely difficult to detect that the motor 3 is completely stopped.

FIG. 3 shows the stopping position of the magnetic head 2 on the magnetic sheet 1, which is stopped due to the above operation.

-] In the second embodiment, the magnetic head 2 was stopped at the outer periphery than the track position for the first full rotation, but even in the case of the inner periphery, it is possible to stop the magnetic head 2 by positioning the detector 11 on the inner periphery. .

By locating the magnetic head 2 in the unused area of the magnetic sheet 1 in this way, the magnetic head 1 of the used area can be
There is no deformation, and stable contact between the magnetic head 2 and the magnetic sheet 1 can always be achieved in the area where the magnetic sheet 1 is used.

Further, since the magnetic head 2 is moved while the magnetic sheet 1 is rotating, the magnetic head 2 is moved in a good contact state, so that the magnetic sheet 1 is not damaged at all.

Further, assuming that the position of the detector 11 is the reference track position, when the magnetic sheet 1 is newly installed in the device, the magnetic head 2 is moved to the inner circumference to the extent that it does not cover the outermost track, and then moved to the outer circumference again. "To make it happen": Ri detector 1
It can be stopped at the standard track position with a signal of 1. This makes it easy to manage track feed and track position.

The reason why the head is moved toward the inner circumference is that when the power to the device is turned off and then turned on again, the magnetic head 2 may be located further to the outer circumference than the position of the detector 11. be.

Further, a second embodiment is shown in FIG. In this case, it is effective when the guard band width is wider than the track width and when the track width of the reproducing magnetic head is narrower than the recorded track width.

When the guard band width is wide as shown in Fig. 4, the magnetic head 2 is attached to the track that is currently in contact during the eject operation, one track on the inner circumference, and one track on the outer circumference.
Since the guard band width is wide when the position is positioned, stable contact can be obtained without deformation of the l/rack part.

Further, although the present embodiment has been described with respect to a reproducing machine, the same applies to a recording machine and a recording/reproducing machine.

As described in detail, according to the present invention, there is no deformation or damage to the magnetic sheet, and stable contact between the magnetic head and the magnetic sheet can be obtained at all times, and its practical effects are significant.

[Brief explanation of the drawing]

Fig. 1 is a diagram of one embodiment of the present invention, Fig. 2 is a timing chart, Fig. 3 is a pattern diagram of a magnetic sheet,
Figure 4 is a pattern diagram of the magnetic sheet of the second embodiment;
The figure is a configuration diagram of a conventional example. 1...Magnetic sheet, 2...Magnetic head, 3...Motor, 6...Head mover,
8...Key operation unit, 9...Controller, 11
·····Detector. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 4! Fusugi-kai, sheet figure 5

Claims (5)

[Claims] (1) A detachable disc-shaped magnetic sheet, a magnetic head capable of recording and reproducing a plurality of tracks on the disc-shaped magnetic sheet, and a moving device that moves the magnetic head in the radial direction of the disc-shaped magnetic sheet. , a motor for rotating the disc-shaped magnetic sheet, and an eject SW for operating to perform an eject operation to eject the disc-shaped magnetic sheet from the apparatus, or a stop SW for operating for stopping the apparatus; By operating an eject SW or a stop SW, the magnetic head is moved by the mover outside the plurality of tracks of the disk-shaped magnetic sheet, and after the movement is completed, the rotation of the motor is stopped, or after the rotation of the disk-shaped magnetic sheet is stopped. A disc-shaped magnetic sheet device characterized by being configured to eject. (2) The disc-shaped magnetic sheet device according to claim 1, wherein the outside of the plurality of tracks is located on the inner circumferential side of the innermost track of the plurality of tracks. (3) The disc-shaped magnetic sheet device according to claim 1, wherein the outside of the plurality of tracks is located on the outer circumferential side of the outermost track of the plurality of tracks. (4) The disc-shaped magnetic sheet device according to claim 1, wherein the outside of the plurality of tracks is located between two adjacent tracks. (5) Claim 2 characterized in that the magnetic head is configured so that when the magnetic head is positioned outside the plurality of tracks, the magnetic head does not come into contact with any of the plurality of tracks.
The disc-shaped magnetic sheet device according to item 1, 3 or 4.