JPS6041025Y2 - Tape usage display device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a tape usage amount display device in a tape recorder.

A tape usage display device in a conventional tape recorder is designed to mechanically integrate and display the number of rotations of appropriate rotating parts within a tape drive mechanism.

Therefore, in order to check the remaining amount of tape when recording and playing back a tape of a predetermined length, record in advance the cumulative value of the usage amount display device when the entire tape has been recorded and played. The remaining amount of tape can only be estimated by subtracting the accumulated value of the tape usage amount display device during recording and playback from this recorded value.

Moreover, such a mechanical integrated value is not the tape running length itself, but only an integrated value that corresponds to the tape running length, and the integrated value varies depending on the manufacturer of each tape recorder, or even depending on the model of the same manufacturer's product. from,
It is not possible to clearly know the remaining amount of tape from the integrated value of conventional tape usage display devices, and the only way is to grasp the approximate remaining amount of tape intuitively.

The only way to eliminate the many drawbacks of conventional tape usage display devices is to create a device that is completely different from the conventional tape usage display devices.

The purpose of this invention is to integrate tape recording and playback over time so that the remaining amount of tape can be grasped over time, and also to allow the tape usage amount display section to also be used as a time display section. do.

The feature of this invention is that a gate circuit is opened by a signal from a running switch activated by tape running operation, and by counting and displaying the pulses passing through this gate circuit at fixed time intervals, the recording and playback time of the tape is accumulated. , and the time is displayed based on a clock signal from a clock device by operating a switch.

According to the present invention having such characteristics, time starts to be accumulated in units of one minute, for example, as soon as recording and playback starts, and this accumulated value is displayed, so that the time required to reach any point during recording and playback can be calculated. Readable immediately.

On the other hand, since the time required for recording and reproducing the tape should be known in advance, by subtracting the displayed time from this required time, it is possible to easily know the time required for recording and reproducing the remaining tapes.

In this way, as a unit for expressing the remaining amount of tape, time is more convenient than a unit corresponding to the running length of the tape.

This is because with conventional tape usage display devices that display the total amount according to the tape running length, the user cannot estimate the time required to record and play the remaining tape from this total display value. After all, the tape usage display device was useful in knowing how long it would take to record and play the remaining tape.

Furthermore, according to the present invention, the tape usage amount display device can be used as a time display device by changing the switch, so that it can be used as a clock when not being used as a tape recorder.

The present invention will be explained below with reference to illustrated embodiments.

In the figure, a block 1 surrounded by a broken line is a timekeeping device, and has a circuit configuration similar to that of a commercially available digital watch.

That is, the timing device 1 includes a clock pulse oscillator 2 that emits a pulse signal at 0.1 second intervals, an I/10 frequency divider circuit 3 that converts this clock pulse into a pulse signal at 1 second intervals, and a 1 second frequency divider circuit 3 that generates a pulse signal at 1 second intervals. A W counter 4 that counts pulses at intervals and issues carry signals for river sand intervals, a hexadecimal counter 5 that counts signals from the counter and issues carry signals for one minute intervals, and pulses from the counter. A W counter 6 counts pulses and issues a carry signal at 0 minute intervals, a hexadecimal counter 7 counts pulses from the counter and issues a carry signal at 1 hour intervals, and counts pulses from the counter. a advance counter 8 which issues a carry signal for the IOR interval;
an advance counter 9 for counting pulses from the counter;
The count value by the combination of counter 8 and counter 9 is "
24'', the counter 8 and the counter 9 are reset to ``0'' upon detecting this.

The normally open switch 11 at the left end of the figure is a switch that is closed by the tape running operation, that is, by pressing the play button in a general tape recorder, and the switch 11, the resistor 12, and the power source E are connected in series. When the switch 11 closes, rH is applied to one of the input terminals of the AND circuit 13.
It is connected so that a J level signal is added.

Also, the normally open switch 1 drawn next to switch 11
Reference numeral 4 denotes a switch that is closed by a pause operation, that is, an emergency stop operation for tape running.The power supply E, the resistor 15, and the switch 14 are connected in series, and when the switch 14 is closed, the other input terminals of the AND circuit 13 are connected. rLJ in one
It is connected so that the level signal is added.

The output terminal of the AND circuit 13 is connected to one of the input terminals of the AND circuit 16, and the other one of the input terminals of the AND circuit 16 receives pulse signals at one-minute intervals from the hexadecimal counter 5 in the timekeeping device 1. It can be added.

The AND circuit 13 and the AND circuit 16 are connected to the play switch 1
The gate circuit has a logical configuration such that an operation signal of 1 allows pulses from the timer 1 to pass at fixed time intervals, and operation of the pause switch 14 prevents the pulses from passing.

The output of the AND circuit 16 is added to a forward counter 17, and a carry signal issued from the W counter 17 is counted by a forward counter 18.

The counter 17 and the counter 18 are connected to a reset circuit, and the count value is reset to "0" by a reset operation.

Counter 17 and counter 18 each constitute a BCD counter, and each has four output terminals.

Each of these terminals is connected to one input terminal of each of the eight AND circuits including the AND circuit 19.

The other input terminal of each of the eight AND circuits 19 is grounded via a resistor 24, and the selection switch 2
The movable contact of the switch 26 is connected to the power supply E.

Therefore, when the movable contact of the switch 26 selects the fixed contact a, each AND circuit opens its gate.

On the other hand, each counter 6.7°8.9 in the timing device is also B
The CD counter is configured, but only the blank 9 is "0".
'', ``1'', and ``2'', so a 2-bit counter is sufficient, and the other counters are 4-bit.

Therefore, each counter 6, 7. 8. 9 has a total of 14 output terminals, and each of these output terminals is connected to AND circuit 2.
It is connected to one input terminal of each of 14 AND circuits including 0.

The other input terminal of each AND circuit is grounded via a resistor 25 and connected to a fixed contact of a switch 26.

Therefore, when the movable contact of the switch 26 selects the fixed contact, each of the AND circuits described above opens the gate.

Each output of the AND circuit group including the AND circuit 19 is applied to one of the input terminals of eight OR circuits including the OR circuit 21, and the other of the input terminals of the OR circuit group is connected to the AND circuit. Of the AND circuit group including the circuit 20, the counter 8 corresponding to the counter 6.7 that counts the 1st quantile and the functional quantile
The output terminals of the AND circuits are connected.

Of the outputs of the OR circuit group and the AND circuit group including the AND circuit 20, the outputs of the six AND circuits corresponding to the counters 8 and 9 that count between 1 hour and 10tI are applied to the decoder 22. After being rearranged into signals necessary for digital display, they are added to the digital display section 23.

In the device configured in this manner, the timekeeping device 1 performs a constant timekeeping operation.

That is, the clock pulses emitted by the clock pulse oscillator 2 at 0.1 second intervals are frequency-divided by the frequency dividing circuit 3 into pulse signals at 1 second intervals.

This pulse signal at 1 second intervals is counted by the decimal counter 4, and the counter 4 issues a carry signal at 10 second intervals.

This river sand interval signal is counted by a hexadecimal counter 5,
A carry signal is issued from the counter 5 at one minute intervals.

This one-minute interval signal is counted by a running counter 6,
A carry signal is generated from the counter 6 at m-minute intervals.

This m-minute interval signal is counted by a hexadecimal counter 7,
A carry signal is issued from the counter 7 at one hour intervals.

This one-hour interval signal is counted by a 1-degree counter 8, and the counter 8 issues a carry signal at a 10-hour interval.

The signal of this usage time interval is counted by the usage counter 9.

The count value by the combination of counter 8 and counter 9 is “2”.
4'', the 24 detection unit 10 detects this and resets the counters 8 and 9 to ``0''.

Each counter 6, 7. 8. 9 is added to each one of the input terminals of the AND circuit group including the AND circuit 20. Therefore, if the movable contact of the switch 26 is now selecting the fixed contact, the AND circuit The gates of the AND circuits constituting the group are opened, and the counted values of the counters 6.7 and 8.9 are applied to the decoder 22 via the AND circuit group and the OR circuit group including the OR circuit 21.

The decoder 22 rearranges the counted values of each counter into a signal necessary for digital display and adds this to the display section 23.

The display section 23 is driven by the decoder 22 to display hours and minutes.

Next, switch the selection switch 26 from contact to a,
When the clock side is released and connected to the tape usage side, the gates of the AND circuit group including the AND circuit 20 are closed, and instead, the gates of the AND circuit group including the AND circuit 19 are opened, and the output from the counters 17 and 18 is A state is reached in which the count signal can be passed.

Now, suppose that the user performs a reset operation to reset the counters 17 and 18, and then presses the play button.

When the play button is pressed, the running switch 11 is closed, and an rHJ level signal is applied to one of the input terminals of the AND circuit 13.

Since the other input terminal of the AND circuit 13 is at the rHJ level unless a pause operation is performed, the output of the AND circuit 13 goes to the "H" level and the gate of the AND circuit 16 is opened.

As a result, the AND circuit 16 passes pulse signals of one minute intervals from the hexadecimal counter 5 in the timekeeping device 1.

A counter 17 counts these signals at one-minute intervals, and further generates carry signals at m-minute intervals, which are counted by a counter 18.

In this way, counter 17 and counter 18 count signals in units of one minute over two digits.

The count values of the counter 17 and the counter 18 are applied to the decoder 22 via an AND circuit group including an AND circuit 19 and an OR circuit group including an OR circuit 21.
After being rearranged into signals necessary for digital display, the signals are added to the display section 23, and the display section 23 displays the two-digit number of 1 official rank.

If you press the pause button during recording and playback to emergency stop the recording and playback, the switch 14 closes and the AND circuit 13
Since a signal at the rLJ level is applied to one of the input terminals of the
Prevents the passage of minute pulse signals.

Therefore, the count values of the counters 17 and 18 are temporarily held constant, and the displayed value on the display section 23 is also temporarily held constant.

When the pause button is returned to its original state, recording and playback are restarted and time counting is restarted.

In this way, the time required for recording and reproducing is counted and displayed from time to time, making it easy to know the time required for recording and reproducing the remaining tape.

Further, if the amount of tape used and the time can be selectively displayed using a selection switch as in the illustrated embodiment, it is convenient because it can normally be used as a digital clock.

[Brief explanation of drawings]

The figure is a block diagram showing an embodiment of the present invention. 1... Timing device, 11... Running switch, 13.16... AND circuit, 17, 18...
... Counter, 22 ... Decoder, 23
...Display section.

Claims (1)

[Scope of utility model registration request] A clock device 1 that generates a time signal and pulses at constant time intervals; a play switch 11 that operates according to tape running operation; a pause switch 14 that operates when tape running is temporarily stopped; A gate circuit 16 is logically configured to allow the passage of pulses at fixed time intervals from the clock device 1 and block the passage of the pulses by operating the pause switch 14, and counts the pulses passing through the gate circuit 16. counters 17 and 1B, a selection switch 26 for selecting either the tape usage amount or the time, and the selection switch 26
When the tape usage amount side is selected, the counting signal from the counters 17 and 1B is converted into a signal necessary for digital display, and when the time side is selected using the selection switch 26, the time signal from the clock device 1 is converted. a decoder 22 that converts signals necessary for digital display; and the decoder 22
A tape usage amount display device comprising a display section 23 that digitally displays a tape usage amount signal or a time signal from a tape usage amount signal.