JPS61269263A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To prevent the shape of a sheet abutting surface from being varied, and being flawed, by constituting the titled device so that a cleaning jacket is detected automatically, and a cleaning sheet is not slid to the sheet abutting of a magnetic head more than required. CONSTITUTION:In case when a cleaning jacket 1 has been installed, a contact of a switch 11 is not closed in the direction as indicated with an arrow B but remains opened, due to a discriminating recessed part 3 of the cleaning jacket 1, and it is detected that the installed jacket is the cleaning jacket 1. When it is detected to be the cleaning jacket 1, a motor controlling circuit 13 drives a motor 10 through a motor driving circuit 12 and rotates a cleaning sheet 2. At the same time, a timer 4 is started by a timer start signal (a), and when a prescribed time elapses, the timer 14 outputs a motor stopping signal (b) to the motor controlling circuit 13, and stops the rotation of the cleaning sheet 2. This time is about 1-2(sec).

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic recording/reproducing device using a disc-shaped magnetic sheet rotatably housed in a jacket.

2. Description of the Related Art A conventional magnetic recording reproducing device using a disk-shaped magnetic sheet is disclosed in Japanese Patent Application Laid-Open No. 1982-19278.

FIG. 6 is a schematic diagram of a magnetic sheet rotation drive section in an embodiment of this conventional magnetic recording/reproducing apparatus. 1o1 is a jacket and has a magnetic sheet 102 rotatably housed inside. 103 is a spindle attached to the rotating shaft of the motor 108, which engages with the center core 104 provided at the center of the magnetic sheet 1o2 to rotate the magnetic sheet 1o2.
Rotate 02. 105 is a jacket holder, 10
6 is the outer cover, 107 is the center core 104 and spindle 1
A hook for maintaining the binding state of 03, 109
1 is a drive circuit for driving the motor 108, and 110 is a motor control circuit for controlling the rotation of the motor 1o8. When taking out the magnetic sheet 102 (i.e. Jacquera) 101,
When the hook 107 is pushed in the direction of arrow C, the engagement between the spindle 103 and the center core 104 is released by the restoring force of the spring 111, so the jacket 1o1 can be taken out from the jacket holder 106 in this state (not shown). I can do it.

Recording of signals on magnetic sheet 1o2 or magnetic sheet 1
When reproducing a signal from above the magnetic sheet 1o2, the magnetic sheet 1o2 is rotated in a state as shown in FIG. Head (6th
113) (not shown in FIG. 5), signals are recorded and reproduced.

In the conventional magnetic recording and reproducing apparatus configured and operated as described above, when recording and reproducing operations are performed many times, the magnetic sheet 102 contacts the sheet contact surface 117 of the magnetic head 113.
Magnetic powder that comes off from the magnetic powder and dust in the air adheres to the magnetic sheet 1o2 and magnetic head 11, increasing space loss.
3, the S/ of the reproduced signal cannot be obtained.
This may lead to N deterioration or the inability to perform optimal recording. In addition, attached magnetic powder and dust are removed from the sheet contact surface 117 of the magnetic head 113.
This can also cause burn-in and peeling of the magnetic sheet 1o2.

When removing magnetic powder and dust attached to the magnetic head 113 in this way, as shown in FIG. magnetic head 1
13), and as shown in FIG.
The same shape as the one that stores o2, magnetic sheet 1o
It is easy to think of storing a well-known cleaning sheet 116 in place of step 2 and using it as a cleaning jacket 118, and attaching it to the device in the same way as the jacket 101 storing the magnetic sheet 102 and rotating the cleaning sheet 116. It is conceivable to clean the sheet contacting surface 117 by bringing the sheet into contact with the magnetic head 113.

In FIG. 7, reference holes 114 and 116 are used to attach the jacket 118 to the device.

Problems to be Solved by the Invention However, when the magnetic helad 113 is cleaned by the method described above, there are the following problems.

In the case of using the IJ, =ing member shown in FIG. 6, if the foamed neoprene rubber 112 is strongly slid against the sheet contact surface 117, the magnetic head 113 may be damaged. Furthermore, when cleaning the magnetic head 113 using the cleaning jacket 118 shown in FIG.
If the magnetic sheet 102 is kept rotating, the sheet abutting surface 117 of the magnetic head 113 will be scraped and its shape will change, and the next time the magnetic sheet 102 is attached, the magnetic sheet 1o2 and the magnetic head 113 will not have a good relationship. There have been problems in that a contact state cannot be obtained and that the cleaning sheet 116 slides on the sheet contacting surface 117 for a long period of time and the cleaning sheet 116 damages the sheet contacting surface 117.

SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to provide a magnetic recording and reproducing device that can clean a magnetic head using a cleaning sheet without changing the shape of the sheet contacting surface of the magnetic head or damaging the sheet contacting surface. .

Means for Solving the Problems The present invention provides a jacket detecting means for detecting whether the jacket houses a magnetic sheet or a cleaning sheet, a motor for rotating the magnetic sheet or the cleaning sheet, and a jacket detecting means for detecting whether the jacket houses a magnetic sheet or a cleaning sheet. The magnetic recording and reproducing apparatus includes a motor control means for controlling the rotation of the motor according to the output of the means.

Operation The present invention has the above-described configuration, so that when the cleaning sheet is attached to the apparatus, the cleaning sheet does not slide on the sheet contact surface of the magnetic head more than necessary.

Embodiment First, FIG. 2 shows an embodiment of a cleaning jacket used in the magnetic recording/reproducing apparatus of the present invention.

This will be explained using FIG. FIG. 2 is a plan view of the cleaning jacket 1, and FIG. 3 is a sectional view of the entrance of FIG. 2 is a well-known cleaning sheet; 3 is a recess for identification; 4 is a well-known cleaning sheet;
is a center core, and 5.6 is a reference hole for attaching the jacket 1 to the device.

The identification recess 3 is recessed inside the jacket 1 as shown in FIG. 3, and is not present in the jacket containing the magnetic sheet (hereinafter referred to as the magnetic sheet jacket). Therefore, by detecting the presence or absence of this identification recess 3, it can be determined whether the jacket is a cleaning jacket or a magnetic sheet jacket. Except for the identification recess 3, the magnetic sheet jacket and the cleaning jacket 1 have the same external dimensions.

Next, an implementation of the magnetic recording/reproducing apparatus of the present invention will be described. FIG. 1 shows a schematic diagram of a magnetic sheet rotation driving section of a magnetic recording/reproducing apparatus according to a first embodiment of the present invention. In FIG. 1, T is a jacket holder, 8 is an outer cover, 16 is a spindle that is attached to the rotating shaft of the motor 1o and engages with the center core 4, and 9 is a holder for maintaining the engagement between the center core 4 and the spindle. 11 is a switch for detecting the identification recess of the cleaning jacket 1; 12 is a motor drive circuit for driving the motor 10'; 13 is a motor control circuit for controlling the rotation of the motor 10; 14 is a It is a timer.

The operation of the magnetic recording/reproducing apparatus of this embodiment configured as described above will be described below with reference to the drawings. FIG. 1 shows a case where the cleaning jacket 1 is attached to the device, and because of the identification recess 3 of the cleaning jacket 1, the contact of the switch 11 does not close in the direction of arrow B and remains open. The detected jacket is cleaning jacket 1. When it is detected that the cleaning jacket 1 is the cleaning jacket 1, the motor control circuit 13 drives the motor 1o via the motor drive circuit 12 to rotate the cleaning sheet 2, and simultaneously outputs the timer activation signal a.
starts the timer 14, and the cleaning sheet 2 slides on the sheet contact surface of the magnetic head (not shown) to remove attached dust and magnetic powder and affect the shape of the sheet contact surface of the magnetic head. The elapsed time is measured until a predetermined time is reached, and when the predetermined time elapses, the timer 14
outputs a motor stop signal to the motor control circuit 13, and upon receiving the signal, the motor control circuit 13 stops supplying power to the motor 10 via the motor drive circuit 12, and stops the rotation of the cleaning sheet 2. let Actually, this time is about 1 to 2 seconds.

When a magnetic sheet jacket is attached to the device (not shown), since the magnetic sheet jacket does not have the distinguishing layer recess 3, the contact of the switch 11 is pushed in the direction of arrow B and the contact closes, so that the magnetic sheet jacket is not attached. Since it is detected that the jacket is a magnetic sheet jacket, the timer 14 does not operate and the motor 10 does not stop due to the operation of the timer 14.

As described above, according to this embodiment, when cleaning the sheet contact surface of a magnetic head using a cleaning jacket, it automatically detects that it is a cleaning jacket, rotates the cleaning sheet for the necessary time, and
After that, the rotation is automatically stopped, so there is no need to rotate the cleaning sheet for a longer time than necessary and change the shape of the sheet contacting surface of the magnetic head, or damage the sheet contacting surface with the cleaning sheet. You can prevent it from getting attached.

FIG. 4 is a schematic configuration diagram of a magnetic sheet rotation drive section of a magnetic recording and reproducing apparatus showing a second embodiment of the present invention. 1, the configuration differs from that of FIG. 1 in that a seat rotation number counting circuit 16 is provided in place of the timer 14 to count the number of rotations of the seat.

The operation of the second embodiment of the magnetic recording and reproducing apparatus configured as described above will be described below.

Cleaning jacket 1 is attached to the device as in the first implementation row.
When the switch 11 detects that the motor 1 is attached, the motor control circuit 13 controls the motor 1 via the motor drive circuit 12.
0 to rotate the cleaning sheet 2, and at the same time, the sheet rotation number counting circuit 1 is activated by the counting start command signal C.
Operate 6.

This sheet rotation number counting circuit 16 starts counting the number of rotations of the cleaning sheet 2, and starts counting the number of rotations of the cleaning sheet 2. After the number of rotations, a motor stop signal d is output to the motor control circuit 13. The subsequent operations are similar to those in the first embodiment. In reality, the number of required rotations is approximately 100 rotations.

Here, the number of rotations of this sheet is calculated by motor 1o.
or a well-known PG that generates one pulse per revolution of the motor 10 used to detect the rotational phase of the motor 10. This can be easily achieved by counting the pulses obtained from (not shown).

As described above, in this implementation row, the cleaning sheet does not slide on the sheet contact surface of the magnetic head more than necessary, so the shape of the sheet contact surface of the magnetic head does not change as in the first implementation row. This can prevent damage to the seat contact surface.

As described in detail, according to the present invention, the cleaning jacket is automatically detected and the cleaning sheet is not slid over the sheet contacting surface of the magnetic head more than necessary. It is possible to prevent the shape of the contact surface from changing and damage to the sheet contact surface, which has a great practical effect.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a magnetic sheet rotation drive unit of a magnetic recording and reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a plan view of a cleaning jacket provided with identification holes, and FIG.
FIG. 4 is a schematic configuration diagram of a magnetic sheet rotation drive section of a magnetic recording/reproducing apparatus according to another embodiment of the present invention; FIG.
The figure is a schematic diagram of a magnetic sheet rotation drive unit of a conventional magnetic recording/reproducing device, Figure 6 is an explanatory diagram of a conventional glue IJ-two member, and Figure 7 is a diagram of a jacket in which a cleaning sheet is stored in a magnetic sheet jacket. FIG. 1...Cleaning jacket, 2...Mark/cleaning sheet, 3...Identification recess, 11.
·····switch. 1st Figure 1. Cleaning dish... Throat 2...
Cleaning sheet 3... Recessed part for fishing Z/I... Sui-soko Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1. Title of the invention Magnetic recording and reproducing device 2. Scope of claims (1) A jacket containing a rotatable disc-shaped magnetic sheet or a rotatable disc-shaped cleaning sheet inside. a jacket mounting means for mounting a jacket stored and arranged in the spindle and engaging it with a spindle; a motor for rotating the magnetic sheet or the cleaning sheet engaged with the spindle; and a motor for rotating the magnetic sheet or the cleaning sheet. a magnetic head in contact with the mounting means; jacket detection means for detecting whether the jacket mounted on the mounting means is a jacket containing the magnetic sheet or a jacket containing the cleaning sheet; 1. A magnetic recording/reproducing device comprising a motor control means for controlling the rotation of the magnetic recording/reproducing device. (2) When the jacket detection means detects that a jacket containing a cleaning sheet is attached to the jacket attachment means, the motor control means operates to rotate the motor for a predetermined period of time after attachment of the jacket and then stop the motor. A magnetic recording and reproducing apparatus according to claim 1, characterized in that the magnetic recording and reproducing apparatus is constructed as follows. (3) When the jacket detecting means detects that a jacket containing a cleaning sheet is attached to the jacket attaching means, the motor control means operates to rotate the motor a predetermined number of times after attaching the jacket and then stop the motor. A magnetic recording and reproducing apparatus according to claim 1, characterized in that the magnetic recording and reproducing apparatus is constructed as follows.