JPH0240601Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a recorder equipped with a running display unit that lights up to indicate the running of the tape, and a lighting element for indicating the beginning of automatic song selection by lighting up.
The present invention aims to significantly improve display performance by switching both of the lighting elements to a blinking display when the tape is fast-forwarded or rewound, and outputting a notification sound during the blinking display.

Conventionally, an in-vehicle tape recorder, which is an example of this type of tape recorder, is constructed as shown in FIG. This is a connected two-contact running direction switching switch, and when the tape runs in the forward direction, it switches to the normal contact n, and when the tape runs in the reverse direction, it switches to the reverse contact r. Reference numeral 4 designates a first light emitting diode whose anode is connected to the positive contact point n and whose cathode is grounded, and forms a first lighting element for driving display. Reference numeral 5 designates a second light emitting diode whose anode is connected to the reverse contact r and whose cathode is grounded, forming a second lighting element for driving display. Reference numeral 6 denotes a running display section comprised of a switch 1, a resistor 2, and both light emitting diodes 4 and 5.

Reference numeral 7 designates a song selection cue switch whose one end is connected to the power supply terminal 3, which is closed by the automatic song selection cue operation, and the power supply +B is connected to the input terminal 8 of the automatic song selection cue circuit (not shown) connected to the other end. supply. A third light emitting diode 9 has an anode connected to the other end of the switch 7 for displaying the beginning of a song selection, and a cathode thereof is grounded via a second resistor 10 for current limiting, forming a lighting element for indicating the beginning of a music selection. . Reference numeral 11 denotes a fast forward/rewind switch whose one end is connected to the power supply terminal 3, which is closed during fast forwarding and rewinding of the tape, and a mute input terminal 12 connected to the other end.
Supply power +B to.

The first light emitting diode 4 lights up when the tape runs in the forward direction, and the second light emitting diode 5 lights up when the tape runs in the opposite direction.
The light emitting diode 4 or 5 only lights up whether the tape is playing normally, or fast-forwarding or rewinding at high speed.

On the other hand, the switch 7 is closed during automatic song selection cueing, and the switch 7 remains closed during the automatic song selection cueing period, and whether it is a standby period before the tape is played by fast forwarding or rewinding, or an operation period during which the tape is played by fast forwarding or rewinding. The three light emitting diodes 9 are kept lit.

Therefore, the running display section 6 does not distinguish between tape playback, fast forwarding, and rewinding, and the third light emitting diode 9 does not distinguish between a standby period and an operation period, so that tape playback and rewinding are not distinguished. fast forward,
There is a drawback that it is not possible to distinguish between rewinding and a waiting period for automatic music selection cueing and an operation period.

This invention was made with the above points in mind, and includes a music selection cue switch that is closed during automatic music selection cueing of the tape, and a music selection cue switch that is placed in parallel with a running display section having a lighting element for indicating tape propagation. a first semiconductor switch for controlling circuit opening/closing of both of the lighting elements, which is provided with a series circuit with a lighting element for cueing display, and is provided between the display section and a power supply terminal or a ground point; a control signal output section that outputs a closing control signal to the switch; a fast forward/rewind switch that is closed during fast forwarding and rewinding of the tape, cuts off the closing control signal and opens the first semiconductor switch; an oscillation unit that outputs an oscillation signal when the closing control signal is cut off; a second semiconductor switch for controlling the opening and closing of electric circuits of both display elements that is provided in parallel with the first semiconductor switch and opens and closes according to the oscillation signal; and the oscillation signal. This tape recorder is equipped with an audio output unit that converts the information into audio and outputs notification sound.

Therefore, according to the tape recorder of this invention, the traveling display lighting element lights up during tape playback when the fast forward/rewind switch is open, and when the tape is fast forwarded or rewinded when the switch is closed. , the lighting element blinks, and during the standby period for automatic song selection, the lighting element for displaying the song selection cue lights up, and both the lighting elements blink during the automatic song selection cue operation period. The lighting and flashing of the lighting elements, tape playback, fast forwarding and rewinding, and the standby period and operating period for automatic song selection can be displayed separately. , a notification sound can be output during the automatic song selection cue operation period, and display performance can be significantly improved.

Next, this invention will be explained in detail with reference to FIG. 2 showing one embodiment thereof.

In the figure, the same symbols as in FIG. 1 indicate the same or equivalent elements, and 13 is provided between the other end of the switch 7 and the anode of the third light emitting diode 9 instead of the second resistor 10 in FIG. It is the third resistor for current limiting, and the switch 7,
A series circuit of a resistor 13 and a third light emitting diode 9 is provided in parallel. 14 is a first NPN transistor whose collector is connected to the cathode of each light emitting diode 4, 5, and 9 and whose emitter is grounded; form. 1
A first inverter 5 has an input terminal connected to the other end of the switch 11, and an output terminal connected to the base of the first transistor 14. 16 is the first
A fourth resistor 17 for setting an input level provided between the input terminal of the inverter 15 and the ground point is a control signal output section consisting of the first inverter 15 and the fourth resistor 16.

18 is a first backflow prevention diode whose anode is connected to the positive contact n, and 19 is a reverse flow prevention diode whose anode is connected to the reverse contact r.
The second backflow prevention diode 20 connected to is a first NAND gate with one input terminal connected to the cathodes of both diodes 18 and 19, and the other input terminal connected to the first inverter 15. 21 is a fifth resistor for input level setting provided between one input terminal of the first NAND gate 20 and the ground point, and 22 is a second NAND gate whose one input terminal is connected to the output terminal of the first NAND gate 20. , 23 and 24 are sixth and seventh oscillation setting resistors provided in series between the other input terminal and the output terminal of the second NAND gate 22, and 25 is a resistor whose both input terminals are connected to the output terminal of the second NAND gate 22. connected third
A NAND gate, 26 is a first capacitor for oscillation setting provided between both input terminals and the output terminal of the third NAND gate 25, and 27 and 28 are provided in series between the output terminal of the third NAND gate 25 and the ground point. second capacitor for differentiation, eighth resistor for differentiation, 2
Reference numeral 9 denotes each NAND gate 20, 22, 25, the fifth to eighth resistors 21, 23, 24, 28, and the first and second resistors.
This is an oscillation section formed by capacitors 26 and 27.

30, the collector is each light emitting diode 4, 5, 9
The emitter is connected to the second transistor of the NPN type, and the base is connected to the connection point between the second capacitor 27 and the eighth resistor 28 via the input ninth resistor 31. A second semiconductor switch for controlling opening/closing of the electric circuit of diodes 4, 5, and 9 is formed.

32 is a buffer whose input terminal is connected to the output terminal of the third NAND gate 25; 33 is a buffer 32;
The 10th input setting resistor, 34, is installed between the output terminal and the ground point, and one fixed terminal is connected to the buffer 3.
A variable resistor 35 is connected to the input terminal of 2 for input level adjustment, and 35 is a third capacitor 3 for coupling the input terminal.
6 is the main amplifier connected to the sliding terminal of the variable resistor 34, 37 is the speaker connected to the output terminal of the main amplifier 35, and 38 is the output terminal of the variable resistor 34.
It is a sub amplifier connected to the other fixed terminal of
An input terminal is connected to a reproduction signal input terminal 39.

40 is a second inverter whose input terminal is connected to the output terminal of the first NAND gate 20; 41 is a base connected to the second inverter 4 through an eleventh input resistor 42;
This is a third NPN type transistor connected to the output terminal of the buffer 32, and its collector is connected to the output terminal of the buffer 32, and its emitter is grounded. Reference numeral 43 denotes an audio output section having a structure shown by a broken line.

When the tape is played back in the forward or reverse direction, the fast forward/rewind switch 11 is open, so the first inverter 15 outputs a high level (hereinafter referred to as Hi) close control signal. The control signal causes the first transistor 14 to conduct, and the light emitting diode 4 or 5 to light up.

On the other hand, both input terminals of the first NAND gate 20
Since the output terminal becomes Hi, the output terminal of the NAND gate 20 is held at a low level (hereinafter referred to as Lo), the third transistor 41 becomes conductive, and the third transistor 41 becomes conductive.
The output terminal of the NAND gate 25 is held at Lo, and the second transistor 30 becomes non-conductive.

Next, when switching from tape playback to fast forwarding or rewinding, switch 11 closes and the first
The output terminal of the inverter 15 becomes Lo, the closing control signal is cut off, and the first transistor 14 becomes non-conductive, and the output terminal of the first NAND gate 20 becomes Hi, and the second and third NAND gates 22,
25 astable multivibrators are activated, and the third
The output terminal of the NAND gate 25 is connected to the sixth and seventh resistors 2.
3, 24, due to the time constant of the first capacitor 26
Changes alternately between Hi and Lo, and the third NAND gate 2
An oscillation signal is output from 5.

The oscillation signal is then input to the base of the second transistor 30 via the second capacitor 27, the differential circuit of the eighth resistor 28, and the ninth resistor 31, and the transistor alternately changes into conduction and non-conduction, and the light emitting diode 4 or 5 flashes.

On the other hand, the output terminal of the first NAND gate 20 is Low
Therefore, the third transistor 41 becomes non-conductive, the oscillation signal is input to the main amplifier 35 via the buffer 32, the variable resistor 34, and the third capacitor 36, and the notification sound based on the oscillation signal is output from the speaker 3.
Output from 7.

Next, when the music selection start switch 7 is closed by the automatic music selection start operation, the first transistor 14 is turned on during the waiting period until the tape starts to be played by fast forwarding or rewinding, that is, until the switch 11 is closed. Since conduction occurs, the third light emitting diode 9 lights up.

During the operation period when the switch 11 is closed and the beginning of music selection is actually performed, the first transistor 1
4 becomes non-conductive, and the second transistor 3
0 alternately changes into conduction and non-conduction, the third light emitting diode 9 blinks, and the speaker 3
A notification sound is output from 7. Note that at this time, the light emitting diode 4 or 5 is blinked.

Therefore, according to the embodiment, by lighting or blinking the light emitting diode 4 or 5, tape playback, fast forwarding, or rewinding can be distinguished and displayed, and the lighting of the third light emitting diode 9,
By blinking, the standby period and operation period for automatic song selection can be distinguished and displayed, and the lighting and blinking of each light emitting diode 4, 5, and 9 allows tape playback, fast forwarding, rewinding, and automatic operation. The waiting period for finding the beginning of music selection and the operation period can be displayed separately. Further, the running direction of the tape can be distinguished and displayed from the first and second light emitting diodes 4 and 5.

Also, during fast forwarding and rewinding of the tape,
Since a notification sound is output from the speaker 37 during the automatic song selection cueing operation period, an audible display can be performed, and, for example, switching operations from playback to fast forwarding or rewinding can be audibly identified. Particularly when used in a vehicle, very effective display can be performed.

Incidentally, if the tape has a recording function of normal running, the light emitting diode 4 or 5 is of course lit during recording.

Further, the same effect can be obtained by providing the first and second transistors 14 and 30 between the power supply terminal 3 and the connection point between the first resistor 2 and the switch 11, that is, the point a.

Furthermore, a lamp or the like may be used in place of each of the light emitting diodes 4, 5, and 9, and if the driving direction is not to be displayed separately, it is sufficient to provide one driving display lighting element in the driving display section 6. good.

[Brief explanation of drawings]

Figure 1 is a wiring diagram of a conventional tape recorder, Figure 2 is a wiring diagram of a conventional tape recorder.
The figure is a wiring diagram of one embodiment of the tape recorder of this invention. 3...Power terminal, 4, 5, 9...1st, 2nd,
Third light emitting diode, 6... Running display section, 7...
Track selection switch, 11... Fast forward/rewind switch, 14, 30... First and second transistors, 17... Control signal output section, 29... Oscillator section,
43...Audio output section.

Claims (1)

[Scope of utility model registration request] A series circuit is provided in parallel with a running display section having a lighting element for indicating the running of the tape, and a series circuit consisting of a music selection cueing switch which is closed during automatic tape selection cueing, and a lighting element for indicating the song selection cueing; a first semiconductor switch for controlling circuit opening/closing of both lighting elements, which is provided between the unit and the power supply terminal or the ground point;
a control signal output section that outputs a closing control signal to the first semiconductor switch; and a fast forward/rewind circuit that is closed during fast forwarding and rewinding of the tape, cuts off the closing control signal, and opens the first semiconductor switch. a switch, an oscillator that outputs an oscillation signal by cutting off the closing control signal, and a second semiconductor switch for controlling the opening and closing of electric circuits of both display elements, which is provided in parallel with the first semiconductor switch and opens and closes according to the oscillation signal. and an audio output unit that converts the oscillation signal into audio and outputs a notification sound.