JPS5928264A - Tape recorder - Google Patents

Abstract

PURPOSE:To discriminate aurally a rapid traverse mode from a rewinding mode, by providing a discriminating sound generating circuit to a stereo terminal to deliver an audible signal corresponding to a rapid traverse or rewind operation. CONSTITUTION:When a rapid traverse mode is set from a reproduction mode, a signal of H level is supplied to a terminal Tr by a switch mechanism. Then the pulse signal supplied from a terminal TG gives the open/close control to a TRQ1, and the audible signal of an input terminal 1N is supplied continuously to a main amplifier 6 of the left channel. Therefore, an audible sound which continue with about 0.2sec intervals are produced from the left speaker of a headphone. Thus the user can understand that a tape recorder is set under a rapid traverse mode. In a rewind mode, a signal of H level is supplied to a terminal TR by a switch mechanism. Then a TRQ2 is opened and closed by the pulse signal of the terminal TG like the rapid traverse mode. Then intermittent sounds are heard through the right headphone. Thus the user can understand a rewind mode.

Description

[Detailed description of the invention] [Industrial application field] It is about da.

[Background technology and its problems]

Various operations of the tape recorder A small tape recorder that can be operated with a remote control device is convenient because operations such as selecting a playback song can be performed while the tape recorder is stored in the tape recorder Y pocket. If you set the tape recorder to fast forward or rewind mode, the headphones will be silent, so you may be unsure whether the tape is running according to the operating mode or whether it has already stopped, so you may want to check Sometimes I take the tape recorder out of my pocket and watch the tape move.

In the end, the advantage of being able to remotely control the tape recorder is lost.

[Purpose of the invention]

In order to solve these problems, the present invention provides an identification sound generation circuit that outputs an audible signal corresponding to fast forward or rewind operations to the stereo terminal of the tape recorder, and detects whether the tape recorder is in fast forward mode or not. , it is possible to tell whether the player is in rewind mode or not.

[Summary of the invention]

An audible signal source is selectively supplied to the left and right stereo output terminals by a switch signal related to fast-forward or rewind operation of the tape recorder, and headphones, etc. connected to the stereo terminal can be used to switch the tape recorder to fast-forward mode 2. To be able to distinguish between return modes.

〔Example〕

FIG. 1 shows an identification sound generation circuit for a tape recorder showing an embodiment of the present invention. In this figure, 1N is the input terminal to which the audible signal source is input, and the audible signal source is the audio oscillator (
approx. 2KHz) or FG (alternating current generator) pulses used in capstan servos.

Q+ and Qz are switching transistors that are opened and closed by the outputs of the AND circuits 1 and 2, and one input of the AND circuits 1 and 2 is a terminal T to which a signal that becomes H level during a fast forward operation is input, and a rewind transistor. A terminal T1 is provided to which an H level signal is input during operation, and a pulse signal with a period of approximately 0.2 seconds is supplied to a terminal T6 common to the other input side.

The pulse signal is a frequency-divided signal of an audible signal source.

Alternatively, a reel rotation detection signal (tape end detection pulse signal), etc. can be used.

Furthermore, 3 surrounded by a dashed line indicates a reproducing circuit of a tape recorder, and this reproducing circuit 3 includes magnetic heads M1, M2, . and preamplifier 4.5. and a main 7-channel 6.7, and reproduced signals are output from left and right stereo terminals Lch*R and ch, similarly to a normal tape recorder.

In the circuit configuration shown in Figure 1, when the tape recorder is in the normal playback mode, the signals at the two terminals T, T, and T are both L.
level, so the outputs of AND circuits 1 and 2 are L.
level, and the switching transistors Qx-Q* are in the off state.

Then, the tape playback sound is amplified by the preamplifier 4.5° and the main amplifier 6.1 and sent to the left and right stereo terminals Lch *
The signal is supplied from the Rch to the headphones.

When a tape recorder performs a fast forward operation from the playback mode, the magnetic heads M, , M, retreat from the tape and the playback sound disappears, but a signal at the terminal TFKH level is supplied by a switch mechanism (not shown). As the pressure increases, the audible signal being supplied to the input terminal 1N is interrupted and the resistor R
I+ is supplied to the left channel main amplifier 6 via the coupling capacitor C1.

As a result, the left speaker of the headphones connected to the stereo terminals Lch e Rch K will emit an audible sound that is intermittent at approximately 0.2 second intervals, e.g., a beeping sound, and the user will be reminded that the tape recorder is in fast forward mode. can be perceived.

Also, when the tape recorder is rewinded, signals at terminals T and KH are supplied by a switch mechanism (not shown), and switching transistor Q is supplied as in the case of fast forwarding.
Terminal ■. It is opened and closed by a pulse signal, and an intermittent sound can be heard from the right headphone.

Therefore, the user can perceive that the tape recorder is in rewind mode.

It is preferable to configure the tape recorder so that, when placed against the tape recorder, an identification sound is generated from the ear at a position corresponding to the lateral pressure in the running direction of the tape.

When the reel stand detection signal is used as the pulse signal, the pulse signal disappears at the end of the tape, so the end of the tape can be heard as well as the operation mode.

When using the FG pulse as the audible signal in the embodiment described above, the switching transistor QX.

Q! , AND circuit @1.2 only needs to be added, which simplifies the circuit.

FIG. 2 is a circuit diagram showing another embodiment of the present invention. In this circuit example, it is possible to generate an identification sound that simulates the running state of the tape.

In this circuit, as in the embodiment shown in FIG. 1, an audible signal is input from the input terminal IN, and a pulse signal is supplied from the terminal T@. 11, 1.2 are connected to input terminals 0゜l, 2. . . . shows a multiplexer that can sequentially connect the signals of 7 to the output terminal X, and an audible signal is input through the resistor.

13 is an up/down counter (referred to as a U/D counter) that counts the pulse signals, and this U/D counter 13 is set by an H level signal at terminal T when the tape recorder is operated in fast forward mode. An addition operation is performed by the output of the flip-flop (F/F) 140 set, and when the tape recorder is rewinded, the signal at terminal 1 becomes H level, so that the F/F 14 is reset, and its reset output The subtraction operation is performed by The count output of the U/D counter 13 is supplied as a control signal to the multiplexer 11.12 from output terminals B, C, and D, and a carry signal is sent to the next delayed flip-flop ptub (D-F/F).
15 clock terminals.

That is, when the U/D counter 13 is composed of 4 bits, the upper 3 bits of the count code signal θ to 15 are supplied to the multiplexer 11.12, and each time the 16 pulse signals are input, Carry signal is D-F/F
Invert the output Q of 15.

The Nant gate 16 connects the output of the D-F/F 15, the pulse signal of the terminal T0, and the terminal T7. which becomes H level during fast forwarding or rewinding operations. Or T.

Since the logical product of the signals is calculated, when all of them become H level, the multiplexers 11 and 12 are loaded. Note that 17 indicates an OR gate.

Next, the operation of the embodiment shown in FIG. 2 will be explained with reference to the waveform diagram shown in FIG. 3.

Terminal T□1 except during fast forward or rewind operations.
．． Since both of them are at the L level, the output of the Nant gate 16 is at the H level, and since the inhibit terminals INH of both the multiplexers 11 and 12 are at the H level, the output terminal The number is not output.

When a fast forward operation is performed from this state at time T1, the signal at terminal T becomes H level as shown in Fig. 3, and the F/F
14 sets the U/D counter 13 to terminal T.
, the pulse waveforms of , are counted. Furthermore, when the output Q of the D-F/F15 becomes H level, the output of the AND gate 16 is transferred to the terminal T.
The L level and the H level are repeated at a period of 6 pulse signals.

Multiplexer 11゜120 that switches according to the count code signal of the upper 3 bits of the U/Jl counter 13
Input terminal 0. l, 2, 3.・・・・・・As mentioned above, in 7, R, < R, < R8 < R, < Island < R
.

<Since the audible signal is input through a resistor with a resistance value of a stone, when the counting code signal is 00, the multiplexer 11 outputs an audible signal through a resistor with a resistance value of R to the output terminal XK. , no signal is output from multiplexer 12. Next, when the counting code signal becomes 1, the signal at the input terminal 1 (resistance value R,) of the multiplexer 110 is outputted to the output terminal is output to.

Similarly, when the counting code signal becomes 2 to 7, the audible signal of input terminal 2 to 7 is output from output terminal XK.

Therefore, as shown in the waveform diagram of FIG. 3, the output terminal 01°0 of the identification sound generation circuit receives an intermittent first audible signal L (multiplexer 11) whose amplitude gradually decreases and an intermittent audible signal whose amplitude gradually increases. A second audible signal R (multiplexer 12) is obtained.

By the way, when the U/D counter 13 outputs the carrier signal, the output Q of the DF/F 15 is inverted, so the transmission of this signal is prohibited by the Nant gate 16, and the next time the carry signal is output, T! is repeated again.

Said 1st. and a second audible signal, R is terminal 0.
．． 0. As in the embodiment shown in FIG. 1, the signal is supplied to the left and right main amplifiers 6 and 7 to drive the headphones, so that the headphones generate sound as if it were flowing from left to right. That is, since a sound that simulates the fast-forward running direction of the tape is obtained, the user can intuitively know that the tape recorder is in the fast-forward mode.

At the time of rewinding operation, the terminal T becomes H level and the above-mentioned first. a second audible signal;
R is obtained, but in this case, the U/D counter 13 is in a subtraction operation by resetting li'/F 14. Therefore, multiplexer 11.12
Since the switching operation of is switched from input terminal 7 toward O, the second audible signal R is controlled so that its amplitude becomes smaller sequentially, as shown by the arrow REW in FIG. The audible signals are controlled so that their amplitudes increase sequentially.

Therefore, the sound generated from the headphones appears to flow from right to left, and the sound simulates the tape rewinding direction, allowing the user to know that the tape recorder is being driven in rewind mode. In the above embodiment, the identification sound is heard through headphones, but it may also be used when listening to a tape recorder through speakers.

〔Effect of the invention〕

As explained above, in the tape recorder of this invention,
It drives a circuit that generates a discriminative tone that indicates the direction of tape travel in connection with fast forward or rewind operations, and a speaker (
Since it is configured to emit an identification sound from the headphones (headphones), you can audibly confirm whether it is in fast forward mode or rewind mode, especially when operating a small tape recorder with remote control function. This has the effect of further improving the effectiveness of the operation.

[Brief explanation of the drawing]

Figure 1 is a circuit diagram for generating an operation identification sound for a tape recorder showing one embodiment of the present invention, Figure 2 is a circuit diagram for generating an identification sound showing another embodiment of the invention, and Figure 3 is a circuit diagram for generating an identification sound for a tape recorder according to an embodiment of the present invention. It is an operation explanatory diagram. In the figure, 1N is an audible signal input terminal, ■. is the terminal for the pulse signal, ■ is the terminal to which the signal is supplied during fast forward operation, ■
, is the terminal to which the signal is supplied during the rewind operation, QIIQ,
indicates a switching transistor, and Lch r Rch indicates left and right stereo terminals.

Claims (1)

[Claims] A tape recorder for selectively supplying audible signals to left and right stereo output terminals by signals associated with fast-forward and rewind operations of the tape recorder.