JPH01146102A - Rotary head type recording or reproducing device - Google Patents

Abstract

PURPOSE:To eliminate the interference between adjacent tracks by using recording or reproducing heads different between the positive direction and the negative direction and adjusting heights of heads in respective directions. CONSTITUTION:In a first mode, an instruction which rotates a reel motor 5 or 6 in the positive direction is sent from a CPU 23 to run a tape 1 in the position direction, and the direction is sent to a head changeover switch 22 also, and recording or reproducing heads 7 and 8 of the first mode are used to perform recording or reproducing. In a second mode, an instruction which rotates the reel motor 6 or 5 in the negative direction is sent from the CPU 23 to run the tape 1 in the negative direction, and the instruction is sent to the head changeover switch 22 also, and recording or reproducing heads 9 and 10 of the second mode are used to perform recording or reproducing. In this case, the interference between adjacent tracks is eliminated when heights of heads 7-10 are so preliminarily adjusted that they are suitable for respective directions.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a rotary head type recording or reproducing device, and more particularly to a rotary head type recording or reproducing device capable of bidirectional recording or reproducing using a tape-shaped recording medium. It is something.

[Prior Art] Conventionally, a rotary head type recording or reproducing device capable of recording or reproducing in both directions using a tape-shaped recording medium has a rotary head type recording or reproducing device capable of recording or reproducing in both directions. Even when running a tape, the same head was used to perform recording or playback in the same way.

FIG. 4 is a diagram showing the relationship between the head and tape in conventional bidirectional recording, where 11 and 12 are magnetic heads (hereinafter referred to as heads) in the forward direction, respectively.

It records in the negative direction, and 13 is a tape.

14 and 15 respectively indicate the height in the positive direction and the height in the negative direction, and FIG. 5 is a diagram showing recording tracks in the positive and negative directions when recording is performed using the recording method shown in FIG. 4. As is clear from FIGS. 4 and 5, the width of the recording track on the tape differs depending on the thickness of each head 11, 12 shown in FIG.

[Problems to be solved by the invention] In the conventional recording system as described above, even if the heights of the heads are different during unidirectional recording or playback, it is possible to achieve accurate tracking by adjusting the heights of each head. However, in the case of bidirectional recording or playback, due to variations in the thickness of the head, the height of the head in other directions cannot be adjusted, resulting in different track widths during recording, which may overlap adjacent tracks. Therefore, there was a problem in that part of the track was erased.

This invention was made to solve this problem, and even when the heights of the heads are different, by using heads in positive and negative directions and adjusting the height in each direction, it is possible to improve the distance between adjacent tracks. It is an object of the present invention to provide a rotating head type recording or reproducing device that can eliminate interference.

[Means for Solving the Problems] In order to achieve the above object, the rotary head type recording or reproducing apparatus of the present invention has a first mode in which a tape-shaped recording medium is run in the forward direction; Recording or reproduction is performed with at least one head for the second mode, and in the second mode, the tape-shaped recording medium is run in a negative direction and recording or reproduction is performed with at least one head for the second mode. .

[Function] With the above configuration, separate heads are used for the positive direction and the negative direction, so interference between adjacent tracks can be eliminated by adjusting the head heights in both directions separately.

[Embodiment] Fig. 1 is a diagram schematically showing the main parts of an embodiment of the present invention, in which l is a tape which is a recording medium, 2 is a rotating cylinder, and 3 is a first cylinder. 4 is a second post; 5 and 6 are reel motors; 7 and 8 are heads for recording or reproducing in the first mode; and 9 and 10 are heads for recording or reproducing in the second mode.

FIG. 2 is a block diagram showing an overview of the present invention, and 20.21
22 is a switch for switching the head, 22 is a switch for switching between positive and negative directions, 23 is a CPU, 24 is an operating unit, 25 is a reel motor drive circuit, 26 is a signal processing unit for recording or playback, and 27 is a signal input/output unit. It is a terminal.

In addition, Figure 3 shows Figure 1. FIG. 7 is a diagram showing the height of a head in a second mode. In addition, in FIGS. 1 to 3, the same reference numerals as in FIG. 4 indicate the same or corresponding parts.

Assume now that the direction in which the reel motors 5 and 6 rotate clockwise is the positive direction. In FIG. 2, the operating section 24
The first mode and the second mode are determined by sending signals such as instructions from the CPU 23 to the CPU 23.

In the first mode, the CPU 23 sends a command to rotate the reel motor 5 or 6 in the forward direction to cause the tape 1 to run in the forward direction, and also sends a command to the head switching switch 22 to rotate the reel motor 5 or 6 in the forward direction. Recording or playback is carried out by using the recording or playback mode helad 7.8 in a known manner.

In the second mote, the CPU 23 controls the reel motor 6.
Alternatively, by sending a command to rotate the head 5 in the negative direction, the tape l is run in the negative direction, and at the same time, a command is also sent to the head changeover switch 22 to turn the head 9.10 for recording or playback in the second mode. Recording or reproduction is performed by using a known method.

In this case, the height of the head may be adjusted in advance to suit each direction as shown in FIG.

[Effects of the Invention] As explained above, the present invention uses different recording or reproducing heads in the positive direction and the negative direction and adjusts the height of the head in each direction, thereby improving the distance between adjacent tracks. interference can be eliminated.

[Brief explanation of the drawing]

FIG. 1 is a diagram schematically showing the main parts of an embodiment of the present invention, FIG. 2 is a block diagram showing an overview of the present invention, and FIG. Figure 4 is a diagram showing the head height in the second mode, Figure 4 is a diagram showing the relationship between the head and tape in conventional bidirectional recording, and Figure 5 is a diagram showing the relationship between the head and tape when recording using the recording method shown in Figure 4. FIG. 3 is a diagram showing recording tracks in positive and negative directions. In the figure. l: Tape 2: Rotating cylinder 3.4: Post 5.6 = Reel motor 7.8, 9.10 + Head agent Patent attorney 1) Haru Kitatake

Claims (1)

[Claims] In the first mode, the tape-shaped recording medium is run in the positive direction, and recording or reproduction is performed using at least one head for the first mode, and in the second mode, the tape-shaped recording medium is run in the negative direction. A rotary head type recording or reproducing device, characterized in that recording or reproducing is performed using at least one head for a second mode.