JPS5880137A - Double type tape recorder - Google Patents

Abstract

PURPOSE:To facilitate dubbing even though either one of two tape driving mechanisms is reset to a stop mode while the other mechanism is in a mode other than the stop mode, by preserving the output of a pause signal. CONSTITUTION:When a tape T is reproduced and then dubbed to another tape T', a dubbing switch 11 is provided between a reproducing amplifier 10 and recording amplifier 12 to ensure a connection to a pause controlling circuit 13. The circuit 13 contains a detecting circuit 15 which detects the intervals of music of the tape T and a function which receives the signal from the circuit 15 in a dubbing mode and delivers the pause signal to switch a reproducing/recording mode to a pause mode for both tapes T and T'. Then one of the two driving mechanisms is kept in a pause mode although the other driving mechanism is set in a stop mode to replace one of the tapes T and T'. Thus the dubbing mode is obtained again by setting a driving mechanism in a reproduction mode and releasing the pause mode of the other driving mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention includes first and second tape drive mechanisms, and is capable of copying and recording reproduction signals reproduced from the magnetic tape of the first tape drive mechanism onto the magnetic tape of the second tape drive mechanism. This paper relates to an improved idea for a duplex tape recorder.

If you look at recent tape recorders, you will notice that each tape recorder has an independent first
and a second tape drive mechanism, so that recorded information reproduced from the magnetic tape of one tape drive mechanism can be copied onto the magnetic tape being run in recording mode by the other tape drive mechanism.

However, in conventional duplex tape recorders, once the first tape drive mechanism is set to the playback mode and the second tape drive mechanism is set to the recording mode, the so-called copy mode is set, and then the stop button switch is pressed. This has the disadvantage that unless both tape drive mechanisms are operated to stop, the copying mode continues, which is extremely cumbersome.

The present invention has been devised in view of the problems of the conventional duplex tape recorder, and one embodiment thereof will be described in detail below with reference to the accompanying drawings.

Of the accompanying drawings, FIG. 1 is a perspective view showing a mechanism for turning on and off the pause circuit control switch in the first and second drive mechanisms of the duplex tape recorder according to the present invention. 1 is a head substrate with a magnetic head (
In the first tape drive mechanism, there is a reproducing magnetic head 2,
In the second tape drive mechanism, a recording/playback magnetic head 3 is used.
), and these magnetic heads 2 (3) are placed on a main board (not shown) in the directions of arrows a and b in order to move them toward and away from the magnetic tape T in conjunction with the operation of a playback operation means (not shown). It is designed to move forward and backward.

4- is a switch actuating lever which is pivotally supported on a shaft 57 with a centrally resting portion, and an engaging pin 6 provided at one end thereof is engaged with an engaging hole 7 provided in the head substrate 1. Then, by rotating in the directions of arrows c and d together with the sliding of the head substrate 1, the pause control switch 8 (9) is turned on at the other end.
It is designed to turn off. In short, head board 1
When the magnetic head 2 (3) moves forward (in the direction of arrow a) and assumes the playback (recording) position where the magnetic head 2 (3) contacts the magnetic tape T, the pause control switch 8 (9) is turned on, and the head substrate 1 When taking a stop position where (3) does not touch the magnetic tape T, turn off the pause control switch 8 (9).
It's designed to be F.

Next, FIG. 2 is a schematic circuit diagram showing the control circuit of the duplex tape recorder according to the present invention, in which the signal picked up from the magnetic tape T by the magnetic head 2 in the first tape drive mechanism is transferred to the playback amplifier 10°. Copying and recording ( dubbing).

The dubbing switch 11 is operated manually 2
It is a continuous switch, which is closed only during copy recording as shown by the solid line, and supplies the reproduction signal of the magnetic tape T output from the reproduction amplifier 10 to the recording amplifier 12 on the second tape drive mechanism side as described above. At the same time, it is supplied to a pause control path 13, which will be described later, and when each tape drive mechanism is driven independently, it is open as shown by the dotted line.

The pause control circuit 13 includes a resistor R15R2 and capacitors CI and C2 for setting the reproduction signal input through the dubbing switch 11 to a desired frequency width, and a limiter amplifier for amplifying it to a sufficient voltage level. 14, the length of time for the presence or absence of the reproduction signal can be set with the resistor R3 and the capacitor C3, and the level of presence or absence of the reproduction signal can be set with the resistor R4, and if there is a reproduction signal from the limiter amplifier 14, no output is output. , if there is no signal, that is, if a no-signal part (between songs) is detected after receiving the playback signal, the output (
and a song interval detection circuit section 15 that outputs a song interval detection signal.

And this pause control circuit] 3 limiter amplifier 14
and the song interval detection circuit section 15 are connected to the DC voltage source B' through a parallel circuit consisting of the pause control switches 8 and 9, and therefore the pause control circuit 13 is connected to both of the pause control switches 8 and 9 or It is designed to operate when either one is closed.

16 is an RS flip-flop (referred to as FF) whose set input terminal S receives the output of the song interval detection circuit 15, and its output terminal Q is connected to the switching transistor 1.
7 and 18 bases.

The FF 16 is connected to the DC voltage source B via the pause control switches 8 and 9, and is set to an operating state by receiving voltage from the DC voltage source B, and is connected to the reset input terminal R. Clear switch 1 installed between
It is designed to be cleared in 9.

The switching transistors 17 and 18 have their emitter terminals grounded and their collector terminals connected to the power source E via motor drive switches 20 and 21, respectively.

22 and 23 are the first . The switching transistor 17. is a tape drive motor in the second tape drive mechanism.
Its driving is controlled by turning on and off 18.

Reference numeral 24 denotes a changeover switch interposed between the DC voltage atom B and switching transistors 17 and 18 (9 base terminals), which is linked to the dubbing switch 11 and is turned off when the dubbing switch 11 is turned on.

The motor drive switches 20 and 21 are turned on and off in response to the operation of a regeneration operation means (not shown).

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

When copying a song on the magnetic tape T- set in the first tape drive mechanism to the magnetic tape T' set in the second tape drive mechanism, first turn on the dubbing switch. 11 (changeover switch 24 is turned OFF), the playback operation means (playback button, etc.) of the first tape drive mechanism and the recording operation means (playback button, record button, etc.) of the second tape drive mechanism are respectively turned on. It is preferable to move the head board 1 of each tape drive mechanism from the stop position to the playback (recording) position by operating the tape drive mechanism, and turn on the pause control switches 8 and 9 and the motor drive switches 20 and 21.

When each switch is turned ON or OFF as described above, the instantaneous pause control circuit 13 and FF 16 are applied with DC voltage atoms B.
At that time, regardless of whether the magnetic head 2 corresponds to a track section or between tracks on the magnetic tape T, the output terminal Q of the FF 16 is at the H (High) level, so that each switching transistor 17 .18 is ON
At L, each tape drive motor 22, 23 is supplied with power from the power supply E, and each motor 22, 23 is driven to drive the magnetic tape T.
and starts running at a constant speed at T'.

Now that the copy recording mode has been established, the playback signal of the song on the magnetic tape T picked up by the magnetic head 2 in the first tape drive mechanism is transmitted to the recording amplifier 12 of the second tape drive mechanism. The signal reaches the magnetic head 3 and is copied onto the magnetic tape T', while being supplied to the pause control circuit 13 from the dubbing switch 11.

In this pause control circuit 13, the inter-music detection circuit 15 is activated and is in the inter-music detection state, but since the inter-musical interval has not yet been reached, the inter-musical detection circuit 15 does not output an inter-musical detection signal.

When the magnetic head 2 passes the end of the song according to the above formula and faces the gap between the next song and the next song, the song interval detection circuit 15 detects that there is an interval between songs and outputs the song interval detection signal. is output to the set input terminal S of the FF 16 at the next stage.

Then, FF16 inverts the output of its output terminal Q and makes it L(
Low) (in short, FF16 outputs a pause signal), the switching transistor 17
and 18 are both turned off, and therefore, the power supply to each of the tape drive motors 22 and 23 is stopped, and the magnetic tape T,
Stop running T'.

In short, both the first and second tape drive mechanisms of the .tau.-precoder are in pause mode.

In such a pause mode, when only the first tape drive mechanism is set to the stop mode in order to replace the magnetic tape T with another magnetic tape, the head board 1 of the first tape drive mechanism returns to the stop position. Together, the pause control switch 8 and changeover switch 20 are turned off, but the limiter amplifier 141 of the pause control circuit 13, the inter-song detection circuit 15 and the F
Since the DC voltage from the DC voltage atom B is still supplied to F1.6 via the pause control switch 8, the F1.6
The L" level of the output terminal Q of F16 does not change, and the pause signal remains output. Therefore, the switching transistor 18 on the second tape drive mechanism side is turned off.
The second tape drive mechanism maintains the pause mode by maintaining the F state.

Next, a new magnetic tape T is set in the first tape drive mechanism, and the playback operation means of the same mechanism is operated to turn on the pause control switch 8 and motor drive switch 20 again, and turn the clear switch 19 on and off. , FF
Clear 16 (i.e. 2.

When the output terminal Q is set to H'' level), the pause is released and the tape drive motors 22 and 23 resume driving to run the magnetic tapes T and T', respectively, and the music on the magnetic tape T is magnetically transferred again. The copying/recording mode for copying onto tape T' is entered.

The above is the copy recording mode, and in order to drive each tape drive mechanism independently, set the dubbing switch 1 to 0FFL, and in response, turn on the changeover switch 24 to change the DC voltage of the DC voltage source B. It is preferable to directly apply the voltage to the base terminals of the switching transistors 17 and 18 via the changeover switch 24, and then operate the desired playback or recording operation means of the tape drive mechanism.

For example, when the playback button of the first tape drive mechanism is pressed, only the drive motor 22 is driven to cause the magnetic tape T to run at a constant speed.

In short, the first tape drive is in playback mode.

As described above, the present invention includes a first tape drive mechanism that can operate independently of each other and that can take at least a stop and playback mode, and a second tape drive mechanism that can take at least a stop and record mode. In the tape recorder having a copy recording mode in which a reproduction signal of a first magnetic tape reproduced by a first tape drive mechanism is recorded onto a second magnetic tape run by the second tape drive mechanism, a track interval detection circuit means for detecting a track interval on the first magnetic tape; and a track interval detection circuit means which operates when receiving a track interval detection signal from the track interval detection circuit means in the copy recording mode, and operates the first and second tape drives. circuit means that operates and outputs data in common to the mechanisms; and setting the circuit means in an operable state when at least one of the first or second tape drive mechanism is in a mode other than the stop mode. and switch means for
The switch means causes the circuit means to continue outputting the pause signal even if the first tape drive mechanism returns to the stop mode in the Bose mode, and outputs the pause signal from both of the tape recorders when copying is finished in the transcription mode. The tape drive automatically goes into Bose mode, which is extremely beneficial.

In addition, in such Bose mode, even if one tape drive mechanism is set to stop mode in order to replace the magnetic tape in the other tape drive mechanism, the other tape drive mechanism is still in Bose mode, so the magnetic tape cannot be replaced. After replacing the
By simply setting one of the mechanisms to the playback (or recording) mode and releasing the pause of the other mechanism, the copy mode can be set again, making the operation extremely simple.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a width shifting head board included in the tape recorder according to the present invention, and FIG. 2 is an electrical circuit diagram showing an embodiment of the tape recorder. Agent Patent Attorney Aihiko Fukushi

Claims (1)

[Claims] 1. A first tape drive mechanism that can operate independently of each other and that can take at least a stop and playback mode, and a second tape drive mechanism that can take at least a stop and record mode; The first regenerated by the drive mechanism
A tape recorder capable of adopting a copy recording mode in which a playback signal of a magnetic tape is recorded onto a second magnetic tape run by the second tape drive mechanism, wherein a song interval in the first magnetic tape is detected. interval detection circuit means, which operates when receiving a song interval detection signal from the song interval detection circuit means in the copy recording mode, and which operates in common with the first and second tape drive mechanisms; circuit means for outputting a Bose signal for causing the tape drive to shift from the playback and recording modes to the Bose mode, respectively; and the circuit means for operating the circuit means when at least one of the first or second tape drive mechanism is in a mode other than the stop mode. and a switch means for setting the tape drive to an enabled state, the switch means continuing to output the pause signal from the circuit means even if the first tape drive mechanism returns to the stop mode in the Bose key. A duplex tape recorder.