JP2615515B2 - Auto-reverse method of tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape recorder having an auto-reverse function for automatically reversing the running direction of a magnetic tape when the magnetic tape runs to the end, and particularly to both ends of the magnetic tape. The present invention relates to an auto-reverse method of a tape recorder that prevents recording or reproduction from being interrupted when a magnetic tape having a non-magnetic area is auto-reversed.

2. Description of the Related Art Various tape recorders for recording on a magnetic tape and reproducing the same have been provided. In order to extend the recording or reproducing time, an automatic reverse function is provided, and the width of the magnetic tape is divided into 1/2. If one side is the A side, the other side is the B side, and after performing recording or reproduction on the A side, the running direction of the magnetic tape is reversed, and recording or reproduction on the B side is performed in many cases.

In this case, when switching from the A side to the B side, it is desirable that reproduction of voice, music and the like is not interrupted.

[0004]

2. Description of the Related Art In general, a magnetic tape used in a tape recorder has a non-magnetic area at both ends of the magnetic tape. After the magnetic area of the magnetic tape passes over a head, the magnetic tape is fed to the end. As a result, the non-magnetic region passes over the head until the magnetic region of the magnetic tape whose running direction has been reversed passes over the head again by operating the auto-reverse function.

[0005]

As described above, conventionally, recording is interrupted by the non-magnetic area of the magnetic tape, and even when reproduced, the reproduction is interrupted in the non-magnetic area. There is a problem that music and the like are interrupted and it is hard to hear.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to make it possible to reproduce continuous voice, music and the like without interrupting recording or reproduction.

[0007]

FIG. 1 is a block diagram for explaining the principle of the present invention. The tape recorder 1 includes a reverse unit 3 for reversing the running direction of the magnetic tape 2 and running the magnetic tape 2.
Is reciprocated on the head 4 to perform recording or reproduction.

A detecting means 5 for detecting a non-magnetic area of the magnetic tape 2, a rotating means 6 for rotating the head 4 by 180 ° based on the detection result of the detecting means 5, and a completion of the rotation of the rotating means 6 An operating means 7 for detecting and operating the reverse means 3 is provided.

When the detecting means 5 detects the non-magnetic area by moving the magnetic tape 2 in one direction, the magnetic tape 2 stops running and at the same time, the head 4 is moved over the magnetic area of the magnetic tape 2. To rotate the magnetic tape 2 at the same time as the rotation of the head 4 is completed.

[0010]

With the above construction, the magnetic tape 2
When recording or reproduction is performed on the surface A, when the non-magnetic area of the magnetic tape 2 is detected and the running of the magnetic tape 2 is stopped, the head 4 rotates on the magnetic area of the magnetic tape to record or reproduce. When the reproduction is continued and the rotation of the head 4 is stopped, the reverse means 3 causes the magnetic tape 2 to run in the reverse direction, so that recording or reproduction on the surface B of the magnetic tape 2 continues.

Therefore, since recording or reproduction on the magnetic tape 2 is continuously performed, continuous voice, music, and the like can be reproduced.

[0012]

FIG. 2 is a block diagram of a circuit showing an embodiment of the present invention. When a switch (not shown) for instructing the start of recording or the start of reproduction is closed, the capstan circuit 8 drives, for example, the reel 10 to move the magnetic tape 2 in the direction of arrow A.

At the time of recording, a recording signal is input from a recording circuit (not shown) to the head 4 and recorded on the magnetic tape 2. And so on.

When the sensor 16 detects a non-magnetic area of the magnetic tape 2, it sends a detection signal to the motor drive circuit 13 and the reverse circuit 11. The reverse circuit 11 having received the detection signal from the sensor 16 sends a stop signal to the capstan circuit 8, so that the capstan circuit 8 stops driving the reel 10 and stops the running of the magnetic tape 2.

At this time, at the same time, the motor drive circuit 13 drives the motor 14 based on the detection signal of the sensor 16 to rotate the head 4. The pulses transmitted by the tachometer 15 attached to the rotating shaft of the motor 14 are counted by the counter 12, and when the head 4 rotates 180 °, a rotation end signal is transmitted to the motor drive circuit 13 and the reverse circuit 11.

The motor drive circuit 1 that has received the rotation end signal
3 stops the rotation of the motor 14, and the reverse circuit 11 that has received the rotation end signal sends a reverse signal to the capstan circuit 8.

Accordingly, the capstan circuit 8 drives the reel 9 to move the magnetic tape 2 in the direction of arrow B.
FIG. 3 is a diagram illustrating the operation of FIG.

As shown in FIG. 3A, when the magnetic tape 2 travels in the direction of arrow A and performs stereo recording, the degaussing head 17 of the head 4 performs degaussing of the magnetic tape 2 and the recording / reproducing head. Reference numeral 18 is recorded on the track 20, and the recording / playback head 19 is recorded on the track 21.

As shown in FIG. 3B, when the non-magnetic area 22 of the magnetic tape 2 is detected by the sensor 16, the running of the magnetic tape 2 is stopped as described above. Then, the head 4 starts rotating at the same time when the traveling of the magnetic tape 2 is stopped.

Then, as shown in FIG. 3C, the head 4 rotates on the magnetic area of the magnetic tape 2 in a direction in which the recording / reproducing heads 18 and 19 can continuously form the tracks 20 and 21 respectively. I do.

When the head 4 rotates by 180 ° as shown in FIG. 3D, the rotation of the head 4 stops as described above, and at the same time, the magnetic tape 2 moves as shown by arrow B in FIG.
Start traveling in the direction opposite to the traveling direction of (A).

Therefore, as shown in FIG. 3 (E), the magnetic tape 2 has a semi-circular track 24 formed by the rotation of the recording / reproducing head 18 and a semi-circular track 24 formed by the rotation of the recording / reproducing head 19. Recording is continuously performed on the circular track 23. Subsequently, as the magnetic tape 2 travels in the direction of arrow B, folded tracks are sequentially formed, and recording is continuously performed.

Although the above description has been made with respect to recording, the same applies to reproduction. If the rotation speed of the head 4 does not differ between recording and reproduction, the recording / reproduction heads 18 and 1 can be used.
The traveling speed of 9 may not be the same as the traveling speed of the magnetic tape 2.

[0024]

As described above, according to the present invention, when performing the auto-reverse operation, the recording or reproduction on the magnetic tape is performed continuously, so that the sound or music can be reproduced without interruption during the auto-reverse operation. Can be done.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating the principle of the present invention.

FIG. 2 is a block diagram of a circuit showing an embodiment of the present invention.

FIG. 3 is a view for explaining the operation of FIG. 2;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 tape recorder 2 magnetic tape 3 reverse means 4 head 5 detecting means 6 rotating means 7 operating means 8 capstan circuit 9, 10 reel 11 reverse circuit 12 counter 13 motor drive circuit 14 motor 15 tachometer 16 sensor 17 degaussing head 18, 19 sound recording / Playback head

Claims (1)

(57) [Claims] 1. A reversing means (3) for reversing the running direction of a magnetic tape (2) and running the magnetic tape (2) having non-magnetic regions at both ends by reciprocating running on a head (4). Detecting means (5) for detecting a non-magnetic region of said magnetic tape (2) in a tape recorder (1) for recording or reproducing by means of
A rotation means (6) for rotating the head (4) by 180 degrees based on a detection result of the detection means (5); and detecting completion of rotation of the rotation means (6), and ) For operating the magnetic tape (2) in one direction, and when the detecting means (5) detects a non-magnetic region, the magnetic tape
At the same time as stopping the traveling of (2), recording or replaying while rotating the head (4) on the magnetic area of the magnetic tape (2).
It continued raw rotation Simultaneously with the completion of the head (4), a tape recorder, characterized in that for running by reversing the running direction of the magnetic tape (2) auto-reverse mode.