JPH0510258Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention relates to a tape recorder, and more specifically, when recording unnecessary information such as commercials by mistake, it can immediately record the unrecorded part before the unnecessary information. This invention relates to a tape recorder capable of performing rewinding and next recording.

When air checking radio broadcasts such as FM,
Editing operations that cut out unnecessary information such as commercials and narrations included in a program and record only the necessary music are essential to air checks.

However, this operation must be performed every time a song ends, which is cumbersome, and unnecessary information may be recorded inadvertently. In such a case, cancel the recording operation, rewind to the unrecorded part between the unnecessary information recording start position on the magnetic tape and the song recording end position, and start recording the next song from that position. or after rewinding to the unrecorded portion as described above, erase some or all of the unnecessary recording (forming a predetermined length of inter-song unrecorded portion), and then record the next song. You have to do something like this.

Moreover, in the series of operations described above, especially the operation of rewinding to the unrecorded part is performed in the playback state (high-speed tape running state), and the rewind is canceled at the position where the trace of the playback sound ends, but the tape speed Because the speed is so fast, even if rewinding is canceled, the tape does not stop immediately, and the tape may be rewound further due to inertia, reaching the end of the song recording area. If you start recording in this state, the necessary part will be erased. Therefore, the next recording operation cannot be performed until after confirming that the unrecorded part has been reached, which makes the operation complicated and time-consuming, so there is a risk that you will not be able to record the next song you want to record. had sex.

The present invention solves the above-mentioned drawbacks by directly switching the tape recorder during recording operation to playback operation in which the tape recorder runs at a speed almost equal to the recording and playback speed in the opposite direction to the current tape recorder running direction. To provide a tape recorder which cancels the playback operation when a non-recording part is reached and the playback sound is interrupted, and automatically shifts to a recording standby state (recording pause state) after detecting this release. It is something.

The present invention will be explained below based on the illustrated embodiments.

Figure 1 shows a part of the tape recorder control circuit of the present invention, where P1, P2, P3, and P4 are recording (REC) operation buttons and playback (PLAY) operation buttons, respectively.
Indicates the operation button, PAUSE button, and edit button.

FF1 is a recording memory circuit that sets and holds the recording operation, and when a trigger generated by temporarily pressing the operation button P1 is input to the set input terminal S, it enters a set state and outputs a control output U1.

The control output U1 is used as a control signal for operating the bias oscillator to supply a bias current to the magnetic head, setting the signal transmission system to a recording operation state, and connecting the recording signal transmission system to the magnetic head.

Further, the control output U1 is input to the OR gate OR, and is sent as a control signal U3 to electronic control switches SW41, 42 (second The magnetic tape is supplied as shown in FIGS. a and b) to keep the magnetic tape running at a constant speed.

FF2 is a reproducing memory circuit that sets and holds the reproducing operation, and is set to a set state by a trigger generated by temporarily pressing the operation button P2, and outputs a control output U2.

The control output U2 is input to the OR gate OR, and is supplied as a control signal U3 to the drive control mechanism and motor switches SW41, 42 to keep the magnetic tape running at a constant speed.

In this case, the control output U1 is not output,
The signal transmission system is in a reproducing operation state.

FF3 is a pause memory circuit that sets and holds a pause state, and this pause memory circuit FF3 is set to alternately repeat setting and resetting upon arrival of a trigger pulse. The pause storage circuit FF3 outputs a pause control output U4 when in the set state.

Therefore, when the pause button P3 is temporarily pressed during a constant speed running state of the magnetic tape during recording or reproduction, the control output U4 is outputted via the pause memory circuit FF3.

The control output U4 opens the electronic control switch SW2, and while the control signal U4 continues,
The constant speed running operation of the magnetic tape is interrupted.

In this pause state, when the pause button P3 is pressed, the control output U4 from the pause memory circuit FF3 disappears, and the magnetic tape returns to the constant speed running state again.

Next, the control output U5 is for setting the edit operation and is output while the operation button P4 is pressed, and the electronic control switch SW1 is opened to cut off the supply of the control output U1 and switch the signal transmission system to the regeneration state. .

In addition, the control output U5 is controlled by an electronic control switch SW31 for reversing the capstan motor, and an electronic control switch SW32 for reel motor reversing (both shown in FIG. 2a,
b), both switches are switched from contact b to contact a, reversing the rotational directions of the capstan motor 14 and reel motor 15.

Therefore, in this case, the reproduction operation will be performed in the opposite direction to the normal tape running direction.

Although not shown, the reel stand during recording and reproduction does not directly transmit the driving force of the reel motor 15, but as is well known in the art, it is first decelerated via a transmission mechanism such as an idler and then transferred to the reel stand. to communicate.

Further, during edit operation, the drive control mechanism switches the transmission mechanism to transmit the driving force to the supply reel stand.

Further, the control output U5 is connected to the input terminal of the FF3 via a differentiating circuit 11 and an inverter 12.

Therefore, it is possible to set FF3 using the differential pulse obtained when the press of the operation button P4 is released, and to shift to the pause state.

The configuration is as described above, and its operation will be explained next.

When the edit button P4 is pressed in the recording operation state, the control output U5 is generated (FIG. 3A, time t ₁ ), SW1 is opened, and SW3 is opened.
Since contacts 1 and 32 switch from contact B to contact A, the signal transmission system switches to the playback state, and the playback operation is performed in the opposite direction to the previous one at a tape speed that is almost the same as the tape speed during recording and playback. Become.

Therefore, listen to the playback sound, and press the edit button P at the point where the playback sound stops, since the point where the playback sound stops is an unrecorded part that precedes unnecessary information.
By releasing the pressure No. 4 (time t ₂ in FIG. 3A) and canceling the reverse playback, it is possible to return to the unrecorded portion.

At the same time, the time when the control output U5 disappears (time
At _t2 ), the polarity of the negative differential pulse (FIG. 3b) obtained from the differentiating circuit 11 is inverted by the inverter 12 and supplied to the pause memory circuit to set it in the set state.

At this time, the recording memory circuit is in the set state and SW1 has also returned to the closed state, so the recording pause state is entered.

Therefore, if you press the pause button P3 when the next song you want to record starts, the pause memory circuit FF will be activated.
3 changes from the set state to the reset state and the control output U4 disappears, so the pause state is canceled and the recording operation is resumed.

Although this embodiment has been explained using a unidirectional recording and reproducing tape recorder, it can be more simply applied to a recording and reproducing auto-reverse tape recorder.

That is, since recording and reproducing in both forward and reverse directions is possible, the reproducing operation in the reverse direction is designated for each edit operation instruction, and the channel of the magnetic head is not switched at the same time.

Further, if it is desired to shift to a recording pause after forming a desired non-recorded portion, it is advisable to add a circuit shown in FIG. 4. That is, the differentiation circuit 16 detects the disappearance of the control output U5 to obtain a negative trigger, operates the timer 18 via the inverter 17, and starts the timer 1.
By performing recording signal muting (recording muting device 19) for a predetermined period of time based on the output of 8, and by detecting the reset of the timer 18 and shifting to a recording pause state, a predetermined unrecorded portion between songs can be formed.

As described above, the present invention directly switches a tape recorder during a recording operation to a playback operation in the opposite direction to the tape running direction and at a tape speed approximately equal to the recording/playback tape speed, thereby achieving a predetermined speed. The playback operation is canceled when the unrecorded part is reached and the playback sound is interrupted, and after detecting this cancellation, the system automatically enters the recording standby state, so that unnecessary recorded information can be quickly removed. It is possible to rewind to the position of no recording and prepare for the next recording operation, so even if unnecessary information such as commercials or narration is accidentally recorded, it can be easily removed and a new recording can be made. It has the excellent effect of not interfering with

In particular, according to this invention, it is possible to judge the end point of the rewinding operation while listening to the playback sound in the reversing direction using the reversing traveling mechanism, etc., so that the rewinding operation can be reliably rewound to the desired position before unnecessary recorded information by operating for the desired period of time. It can be returned.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing one embodiment of the present invention, Fig. 2 a and b are circuit diagrams embodying a part of the block diagram of Fig. 1, and Fig. 3 is a circuit diagram showing an embodiment of the present invention. FIG. 4 is a waveform diagram for explaining the operation, and is a partial circuit diagram of another embodiment in which a part of the embodiment shown in FIG. 1 is changed. P1...recording operation button, P2...playback operation button, P3...pause button, P4...edit button,
FF1... Memory circuit for recording, FF2... Memory circuit for playback, FF3... Memory circuit for pause, SW1, SW
2...Electronic control switch, SW31, SW32...
...Electronic control switch for motor reversal, 11... Differential circuit.

Claims (1)

[Scope of Claim for Utility Model Registration] A reversing running mechanism that reverses the running direction of the magnetic tape when the magnetic tape runs at a constant speed, and runs the tape at a tape speed that is almost the same as the tape speed when running at a constant speed, and during recording operation. a first control means for switching from a recording state to a playback state and operating the reversing traveling mechanism; an operating means for operating the first control means; and detecting that the operation of the operating means has been released. and second control means for activating standby control means for disabling the magnetic tape drive mechanism.