JPH0474307A - Magnetic recording/reproducing device - Google Patents

Abstract

PURPOSE:To surely clean a rotary head in a short time by operating a keyboard in a state that a cassette is not loaded and rotating repeatedly a drum motor in the forward direction and the backward direction at a suitable rotation speed. CONSTITUTION:By operating a keyboard 7 in a state that a cassette is not loaded, its output is provided to an interface circuit 6, by which a drum turn-on command signal (a) which becomes a HIGH level at the time of turning on a drum motor 1 is outputted from the interface circuit 6. Simultaneously, a cleaning mode command signal (b) which becomes a HIGH level at the time of eliminating contamination of a head is outputted. Also, in a pulse generator 4, only when the cleaning mode command signal (b) is a HIGH level, a pulse is outputted, and applied as a direction command signal (d) to a driving circuit 3. In such a way, contamination adhering to the head can be eliminated in a short time and surely.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a magnetic recording/reproducing device having a rotating head.

BACKGROUND OF THE INVENTION In a conventional magnetic recording/reproducing apparatus, a drum motor is controlled to rotate in a fixed direction at a predetermined rotational speed with a tape attached.

Problems to be Solved by the Invention However, in this type of magnetic recording and reproducing device, in order to remove dirt such as tape magnetic powder adhering to the rotating head, the drum motor is manually operated while it is stopped without a cassette installed. I was wiping the rotating head while turning it. Therefore, it takes a long time to clean the head, and since the head is often dependent on the operator's can, there is a problem in that it is difficult to clean the head reliably.

The present invention solves these conventional problems,
It is an object of the present invention to provide a magnetic recording/reproducing device that can remove dirt from a rotating head in a short time and reliably.

Means for Solving the Problems In order to solve the above problems, a magnetic recording and reproducing apparatus of the present invention includes a drum motor having a rotating head, a drum control means for controlling the rotational speed and rotational phase of the drum motor, and a drum motor having a rotating head. a keyboard connected to the drum control means;
The apparatus further includes means for repeatedly rotating the drum motor, which is driven by the drum control means at an arbitrary rotational speed, in forward and reverse directions when the keyboard is operated without a cassette attached.

Effect With the above-described configuration, when the keyboard is operated without a cassette attached, the drum motor repeatedly rotates in the forward and reverse directions at an appropriate rotational speed, thereby bringing the cleaning paper or cloth into contact with the rotating head. You can quickly and reliably remove dirt that has adhered to the head.

Embodiment Hereinafter, a magnetic recording/reproducing apparatus according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a schematic configuration diagram of a magnetic recording and reproducing apparatus according to an embodiment of the present invention. In FIG. 1, 1 indicates a rotary head 2.
3 is a drive circuit that drives the drum motor 1; 4 is a pulse generator that generates a signal instructing the rotation direction of the drum motor 1 to the drive port H3; 5 is a rotation speed of the drum motor 1; A drum control circuit for controlling the rotational phase; 6 an interface circuit connected to the drum control circuit 5 and the pulse generator 4; and 7 a keyboard connected to the interface circuit 6.

Further, a is a drum ON command signal inputted from the interface circuit 6 to the drum control circuit 5, 6 is a cleaning mode command signal inputted from the interface circuit 6 to the drum control circuit 5 and the pulse generator 4, and C is a drum control circuit. A drum control signal input from 5 to the drive circuit 3, d
is a direction command signal input from the pulse generator 4 to the drive circuit 3.

FIG. 2 shows a timing chart of the magnetic recording/reproducing apparatus of the present invention, and (A) shows the drum ON command signal a.

(B) shows the waveforms of the cleaning mode command signal b and [C] shows the waveforms of the direction command signal d.

The operation of the magnetic recording/reproducing apparatus configured in this way will be described below.

By operating the keyboard 7 when no cassette is installed, the output will be sent to the interface circuit 6.
, and as a result, from the interface circuit 6,
A drum ON command signal a that goes to HIGH level when the drum motor 1 is turned on is output as shown in FIG. 2(A). At the same time, a cleaning mode command signal that goes to HIGH level when removing dirt from the head is output as shown in FIG. 2(B). Furthermore, as shown in FIG. 2(C), the pulse generator 4 outputs a pulse only when the cleaning mode command signal is at a HIGH level, and is applied to the drive circuit 3 as a direction command signal d. Further, a drum ON command signal a and a cleaning mode command signal S are input to the drum control port N5, and the drive circuit 3
The 0wA driving circuit 3, to which the drum control signal C is output, applies a drive voltage to the drum motor that rotates the drum motor in the forward direction when the direction command signal d is at LOW level, and in the opposite direction when it is at HIGH level. Add to 1.

Further, this drum control signal C passes through the drive circuit 3 to control the rotational speed of the drum motor 2, and also controls the rotational speed of the rotary head 2.
Drum motor 1 at a rotation speed suitable for removing dirt.
is set to rotate. If you want to remove dirt from the head in this way, rotate the drum motor 1 repeatedly in the forward and reverse directions at an appropriate rotational speed without the cassette installed, and then apply cleaning paper or cloth to the rotating head 2. By contacting it, dirt adhering to the rotating head 2 is removed.

Effects of the Invention As described above, according to the present invention, when the keyboard is operated without a cassette attached, the drum control means repeatedly rotates the drum motor in the forward and reverse directions at an arbitrary rotational speed. By simply bringing cleaning paper or cloth into contact with the head, dirt adhering to the head can be removed quickly and reliably, which is extremely advantageous in practice.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a magnetic recording/reproducing apparatus according to an embodiment of the present invention, and FIG. 2 is a timing chart of the same magnetic recording/reproducing apparatus. 1...Drum motor, 2...Rotating head, 3...
Drive circuit, 4... Pulse generator, 5... Drum control circuit, 6... Interface circuit, 7... Keyboard, a... Drum ON command signal, b... Cleaning mode command signal, C...Drum control signal, d...
・Direction command signal. Agent Yoshihiro Morimoto Figure b -Mon-: Nfu' [-F finger + 1-No. ShiL

Claims (1)

[Claims] 1. A drum motor having a rotating head, a drum control means for controlling the rotational speed and rotational phase of the drum motor, and a keyboard connected to the drum control means;
A magnetic device characterized by comprising means for repeatedly rotating the drum motor, which is driven by the drum control means at an arbitrary rotational speed, in a forward direction and a reverse direction when the keyboard is operated without a cassette attached. Recording and playback device.