JPS5822714B2 - Denpashi Yusei Dokei - Google Patents

Description

[Detailed description of the invention] The present invention relates to a radio-controlled timepiece.

Conventionally, there have been the following radio-controlled timepieces that adjust the hands by receiving forecast signals and hourly signal signals transmitted from, for example, radio broadcasting stations, television broadcasting stations, etc.

Each band filter is provided for the forecast signal and the hourly signal, and the output of the band filter for the forecast signal is supplied to a flip-flop circuit. Supplies the flip-flop circuit.

In this way, the forecast signal is sequentially supplied to each slip-flop circuit, and the time indicating device is regulated by the inverted output of the flip-flop circuit due to the forecast signal just before the hour signal, and the regulation is released when the hour signal arrives. The clock was used to start the time indicating device.

According to this, it was necessary to change the internal circuitry depending on whether the number of forecast signals was an even number or an odd number.

The present invention eliminates the above-mentioned drawbacks by generating a time signal sound and correcting the winning time after the time signal stops.
It is another object of the present invention to provide a radio-controlled timepiece which prevents noise from being mixed into a time signal sound or from generating only noise.

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 1b is a band-pass filter with low resonance sharpness that passes 440 Hz.

2 is a radio receiving circuit (not shown) p which is input to the terminal P.
A forecast signal detection circuit consisting of a narrow band rejection filter that blocks the passage of the frequency of the forecast signal from the detected output of the
In this embodiment, a 440 Hz rejection filter is used to illustrate the operation modified by the NHK time signal sound.

3 is a DC conversion circuit that converts one output of the detection circuit 2 into DC.

4 is a DC conversion circuit that converts the output of the amplifier circuit 1a into DC.

Reference numeral 5 designates a first transistor control circuit which generates an output upon arrival of the forecast signal and maintains its state until the arrival of the hourly signal.

Reference numeral 6 denotes a charging/discharging circuit that charges the battery for a predetermined time when the transistor i holding circuit 5 generates an output, and discharges it when the output stops.

T is a transistor holding circuit that generates an output in response to the charging output of the charging/discharging circuit 6 and the arrival of the second forecast signal, and holds the state until the arrival of the hourly signal.

, 8 is a charging/discharging circuit that is charged by the output of the transistor holding circuit 1 at the same time as the arrival of the second forecast signal, and is discharged until the supply of the hourly signal stops when the hourly signal arrives.

Reference numeral 9 denotes an audio output supply control circuit which supplies the amplified output of the DC conversion circuit 4 before DC conversion to the time signal sound generation circuit 11 by the output action of the charging/discharging circuit 8.

The charging/discharging circuit 6, the transistor holding circuit 1, the charging/discharging circuit 8, and the audio supply control circuit 9 constitute a second transistor control circuit.

Reference numeral 10 denotes a time adjustment device that adjusts the time indicating device by stopping the supply of the hourly signal.

Reference numeral 11 denotes a time signal sound generating device.

Elements 12 to 76 constituting each of the above circuits are resistors, and element 7
7 to 106 are capacitors, elements 101 to 125 are transistors, elements 126 to 143 are diodes, and element 144.
147 is a thermistor, 148 is a correction motor for the time indicating device, 149U speaker, and 150E is a DC power source.

FIG. 2A is a time chart of time signal signals broadcast from NHK, and includes 440 Hz forecast signals al, a2. a3
occurs every second, and an 880Hz hourly signal a is generated on the hour.
4 occurs for 3 seconds.

28th. Figures C and D show the operating time of the transistor 112 shown in the first figure, the charging output generation time of the capacitor 98, and the operating time of the transistor 116, respectively.

Next, the operation will be explained based on FIGS. 1 and 2.

When the time signal is not broadcast, the received audio signals, excluding the signal frequency of 440 Hz, are passed through the band pass filter 1b and the band rejection filter 2, and are amplified by the transistors 108 and 109, and then rectified in the next stage. A circuit converts it into direct current.

This output turns on transistor 111, which in turn turns on transistor 112 and transistor 1.
23 is turned off, making the time signal sound generation circuit 11 inoperative.

On the other hand, if the transistor 112 is off, the transistor 1
The transistors 114, 116 and 118 are also turned off, and the transistor 119 is turned on.

Therefore, the transistor 120 is turned off, and the transistors 121 and 122 are also turned off, so that the motor 148 is turned off.
is not driven.

Next, a case where a time signal is broadcast from a broadcast station on the hour will be explained.

First, when the forecast signal a1 shown in FIG. 2A is received, 440 Hz is passed through the bud pass filter 1b, and 440 Hz' is completely removed by the band rejection 2.

In particular, the bandpass filter 1b is provided in the 440
It is necessary to remove noise components other than Hz and allow the band rejection filter 2 to operate normally.

Now, since the output of the block blocking filter 2 is blocked, the DC output of the DC conversion circuit 3 is stopped.

Therefore, transistor 111 is turned off and transistors 113 and 112 are turned on.

Therefore, capacitor 98 is charged by the current flowing through diode 130 and resistor 51.

As shown in FIG. 20, this charging time t is longer than the pulse width of the forecast signal a1, and is set so that charging ends before the arrival of the forecast signal a2.

As soon as the transistor 115 is turned on by charging the capacitor 98, the transistor 119 is turned off and waits for the arrival of the second forecast signal a2.

On the other hand, since the transistor 112 is turned on, the transistor 123 is also turned on, and power is supplied to the alarm sound generation circuit 11.

When the second forecast signal a2 is received, the DC conversion circuit 4
The generation of the output turns on transistors 114 and 116, and transistor 114 is self-held by transistor 116.

At this time, capacitor 100 starts charging via transistor 116.

Therefore, transistor 118 is also turned on.

The forecast signal a2 amplified by the transistor 110 is supplied to the alarm sound generation circuit 11, and a forecast sound is generated from the speaker 149.

Further, since the transistor 118 is turned on, the transistor 120 is also turned off, and the capacitor 101 is charged.

The third forecast signal a3 is sent to the alarm sound generation circuit 1 in the same way as above.
1, and a forecast sound is generated from the speaker 149.

When the hour signal a4 is received, an output is generated from the DC conversion circuit 3 via the band rejection filter 1b, and the transistor 111 is turned on.

Therefore, the capacitor 98 is instantly discharged via the diode 131, the transistor 111, and the resistor 52, and the transistors 115, 114, and 116 are turned off.

Then, the capacitor 100 is mainly a diode 136,
Discharge occurs through transistor 118 and resistor 60.

Since this discharge time is set to 3 seconds, the transistor 119 remains off during this time.

Therefore, the hourly signal a4 is the forecast signal a2. Similarly to a3, the signal is supplied to the time signal sound generation circuit 11, and the speaker 149 generates the hour signal sound.

After generating the time signal tone for 3 seconds, transistor 118 is turned off and therefore transistor 119 is immediately turned on.

As a result, one terminal of the speaker is grounded and no noise is generated thereafter, especially mechanical noise when adjusting the pointer.

When the capacitor 100 has finished discharging, the transistor 1
18 is turned off, transistor 123 is also turned off,
The power to the time signal generating circuit 11 is cut off.

Also, by turning off the transistor 118, the transistor 12
0 is also turned off and capacitor 101 begins discharging through resistor 68.58.

Therefore transistors 121, 122 are turned on,
Motor 148 is activated and corrects the time setting device.

Note that the discharge time of the capacitor 101 is set to the time necessary for correcting the time indicating device.

In this embodiment, a motor or a plunger is used to correct the time indicating device, but the present invention is not limited to this, and any type of electromechanical correction device may be used.

Note that the number of forecast signals transmitted from a broadcast station or the like is not limited to three as in the above embodiment, but may be any number as long as it is two or more.

As detailed above, according to the present invention, the time signal sound generator is set to the operating state by the first forecast signal, and the time is adjusted after the hour signal sound is generated, so that the time adjustment mechanism is activated. Mechanical noise does not mix into the time signal sound.

In particular, since the hourly signal tone is prevented from generating a sound after the hourly signal tone is generated, the generation of noise can be completely suppressed.

[Brief explanation of the drawing]

FIG. 1 is an electric circuit diagram showing one embodiment of the present invention, and FIG. 2 is a timing chart for explaining a part of its operation. ; lb, 2... blocking filter, 3...
...DC conversion circuit, 4...DC conversion circuit, 5.
...First transistor control circuit, 6...
・Charging/discharging circuit, 7...Transistor holding circuit,
8...Charging/discharging circuit, 9...Audio output supply control circuit, 10...--Time adjustment device, 11ν.
...Time signal sound generator.

Claims (1)

[Claims] 1. It has a DC conversion circuit that converts the output of a filter that blocks passage of the forecast signal frequency into DC, and it has a transistor control circuit whose output state is controlled by this DC conversion circuit, and it receives a time signal and generates a time signal sound. It has a signal supply control circuit that controls the supply of a signal to the time signal generating device,
a circuit that activates the time signal sound generator and the signal supply control circuit by an output generated in the transistor control circuit in response to a forecast signal received first among the time signal signals; a charging/discharging circuit that maintains the signal supply control circuit in an operating state for a set time in response to an hourly signal and then inverts it to an inoperative state;
A radio-controlled timepiece comprising: a circuit that receives an output when the signal supply control circuit is reversed to a non-operating state and corrects a time indicating device.