JPS6338424Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dubbing tape recorder configured to record a playback signal onto a second tape while playing back a first tape.

Generally, this type of dubbing tape recorder is provided with two playing means for driving and playing the first tape and the second tape independently or simultaneously.

Since the purpose is dubbing, one of the performance means is prepared for reproducing the first tape, and the other performance means is prepared for recording and reproducing the second tape.

One of the playing means inputs the playback signal of the first tape to an external device (for example, another tape recorder), so that a line-out signal can be taken out.

In such a dubbing tape recorder,
While playing the first tape, the playback signal can be recorded onto the second tape, and at the same time the playback signal from the first tape can be led to the line-out terminal, so this line-out signal can be sent to the line-out terminal of the other tape recorder. By inputting the signal to the IN terminal, it is possible to record on a third tape prepared in another tape recorder.

By the way, a dubbing tape recorder must drive the first tape and the second tape at the same running speed. During dubbing, in which the output of the reproduced signal from the first tape is recorded on the second tape while being monitored by a speaker, the first tape and the second tape must be driven at the standard first speed (4.75 cm/sec). However, the first tape and the second tape are moved at a second speed higher than the first speed (for example, three times the speed).
When dubbing at high speed, if the high-speed playback signal of the first tape is guided to the line-out terminal, the line-out signal becomes a signal with a compressed time axis, and other tapes that have only the standard first speed The recorder ends up making an abnormal recording on the third tape.

The present invention was proposed to avoid such problems, and the embodiments shown in the drawings will be described below.

1 includes a tape drive mechanism including a capstan 3 driven by a motor 2 and a first tape 4;
10 is a tape including a capstan 12 driven by a motor 11; a drive mechanism, a recording/playback head 15 that records the microphone signal from the input end 14 or the playback signal of the first tape on the second tape 13 during recording, and plays back the recording signal of the second tape during playback; a recording/playback amplifier 16; It is a second performance means having a recording and reproducing circuit including a reproducing amplifier 17, a recording amplifier 18, a line out terminal 19, and a speaker 20. Reference numerals 21 and 22 refer to recording and playback switching switches connected to the recording and playback circuit of the second performance means 10 ;
is a dubbing line for inputting the output of the reproduction amplifier 6 of the first performance means 1 to the recording/reproduction amplifier 16 of the second performance means 10 ; Also connected is a dubbing switch 24 which is closed by a dubbing operation means for simultaneously setting the second performance means 10 to the recording mode. 25 is a first high speed switch for increasing the rotation speed of the motor 2 of the first performance means 1 ; 26 is a second high speed switch for increasing the rotation speed of the motor 11 of the second performance means 10; , 26 are opened and closed in conjunction with each other.
27 is a cutoff switch connected between the reproduction amplifier 7 and the line out terminal 8 of the first performance means 1, and when the first and second high speed switches 25, 26 are in the open state, the rotational speed of the motors 2, 11 is When the first tape 4 and the second tape 13 are driven at the standard first speed, the cutoff switch 27 is closed, and when the first and second high speed switches 25 and 26 are closed, the motor The cutoff switch 27 is configured to open when the rotational speeds of the tapes 2 and 11 are such that the first tape 4 and the second tape 13 are driven at a high second speed.

The present invention is constructed as described above, and its operation will be explained below.

In the illustrated state, the first performance means 1 is set to the playback mode, the second performance means 10 is set to the recording mode, and
The dubbing switch 24 is open, and the first and second high speed switches 25 and 26 are also open.

At this time, the first performance means 1 and the second performance means 10 are operating independently, and the reproduction signal of the first tape 4 is independently reproduced from the speaker 9, and the reproduction signal of the first tape 4 is independently reproduced from the speaker 9.
is in a state where the microphone signal from the input terminal 14 is recorded.

Next, when the first performance means 1 is set to the reproduction mode and the second performance means 10 is simultaneously set to the recording mode by operating the dubbing operation means, the dubbing switch 24 is closed.

Therefore, in this case, the playback signal obtained by playing back the signal recorded on the first tape 4 by the playback head 5 is amplified by the playback amplifier 6, and then input to the recording and playback amplifier 16 via the dubbing switch 24, where it is amplified. Then, the output of the recording/reproducing amplifier 16 is recorded onto the second tape 13 by the recording/reproducing head 15, resulting in a dubbing state.

At this time, if the first high speed switch 25 and the second high speed switch 26 are open, each motor 2, 1
1 drives the first tape 4 and the second tape 13 at the standard first speed and the cutoff switch 27 is closed, so the playback signal of the first tape 4 is transmitted through the playback amplifier 7 and the cutoff switch 27 to the line. The signal is led to the out terminal 8, and the reproduced signal can be monitored from the speaker 9.

Next, in order to operate the dubbing operation means and perform a high-speed dubbing operation, the first and second high-speed switches 2 are activated.
5, 26, each motor 2, 11 will be in a state of driving the first tape 4 and the second tape 13 at the high second speed, and the cutoff switch 27 will be turned on.
Since the first tape 4 is opened, the high-speed reproduction signal of the first tape 4 is cut off by the cutoff switch 27 and is not output to the line-out terminal 8, and the speaker 9 does not generate a harsh high-speed reproduction signal.

Therefore, the high-speed reproduction signal of the first tape 4 is recorded at high speed on the second tape 13 which is driven at the second speed, resulting in a high-speed dubbing state. In this high-speed dubbing state, as mentioned above, the high-speed playback signal is not output to the line out terminal 8, so the high-speed playback signal is mistakenly recorded on the third tape prepared in another tape recorder. There is no danger of that.

As described above, the dubbing tape recorder of the present invention is configured to record the playback signal on the second tape while playing back the first tape. a speed switching means for switching the running speed in synchronization with a standard first speed and a second speed higher than the first speed; and a high-speed reproduction signal of the first tape when the speed switching means is switched to the second speed. Since the tape is equipped with a switch means for cutting off the output to the line-out terminal, the high-speed playback signal is not output to the line-out terminal during high-speed dubbing, and therefore the tape cannot be played at standard speed from the line-out terminal. This makes it possible to completely avoid the risk of abnormal recording caused by inputting high-speed playback signals to other tape recorders being driven.

On the other hand, when dubbing at standard speed, the playback signal can be input to another tape recorder from the line out terminal, so normal recording can be performed on the tape of another tape recorder. It has high practical value as a dubbing tape recorder that enables high-speed dubbing operations and high-speed dubbing operations.

[Brief explanation of the drawing]

The figure is an embodiment of a circuit diagram suitable for the dubbing tape recorder of the present invention. 1 ...First performance means, 2...Motor, 8...Line out terminal, 10 ...Second performance means, 11...
...Motor, 24...Dubbing switch, 25,2
6...first and second high speed switches, 27...cutoff switch.

Claims (1)

[Scope of utility model registration request] While playing the first tape, the playback signal is transferred to the second tape.
In a dubbing tape recorder configured to record on tape, the first tape and the second
a speed switching means for switching the running speed of the tape to a standard first speed and a second speed higher than the first speed in synchronization; and when the speed switching means switches to the second speed, the first tape runs at a high speed A dubbing tape recorder comprising a switch means for cutting off output of a playback signal to a line-out terminal.