JPH043276Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is an electronic watch that displays the time by counting clock pulses, and the operation switch such as the time adjustment switch of the watch is operated separately from the main body of the watch. This relates to a clock installed in the department.

[Prior Art] In the past, switches for adjusting the display time of a clock were generally attached to the watch body, but today, due to the diversification of uses such as clock bulletin boards and automobile clocks, it is difficult to adjust the display time and adjustment of the clock. There are cases in which it is required to provide an operating switch such as a mode changeover position separated from the main body of the watch.

Conventionally, when an operating switch is provided in the operating section and separated from the watch body, the switch cord was simply extended and pulled out from the watch body (for example, Utility Model Application No. 127590/1983).

[Problems that the invention aims to solve] As mentioned above, when the cords of each switch are pulled out from the watch body, as the number of switches increases, the number of lead-out wires increases, making it difficult to wire the operating section and the watch body. There were times when this happened.

[Means for solving the problem] The present invention connects the signal line from the operation unit to the power line from the power supply circuit that supplies stable voltage to the clock circuit, and when the switch on the operation unit is operated, the operation signal is transmitted. A voltage fluctuation circuit is built into the operation section so that the voltage of the power supply line fluctuates when a power supply line voltage occurs, and a fluctuation detection circuit that detects voltage fluctuations in the power supply is built into the clock section, and a decoder circuit that converts this detection signal into an operation signal. We will provide the following.

[Function] This invention sends the signal when the switch is operated to the watch body via the power line as fluctuations in the power supply voltage, so if the power circuit is separated from the watch body and installed in the operation section, it is necessary to The leader line of 1
It can only be a power line that is a double line,
Furthermore, even if the power supply circuit is installed in the watch body, many operation switches can be installed by simply pulling out the power line between the power supply circuit and the watch circuit to the operation unit, and the connection between the operation unit and the watch body can be There is no need to increase the number of wiring lines.

[Embodiment] As an embodiment of the present invention, an example of a circuit that can adjust the hours, minutes, and reset the displayed time in a timepiece circuit is shown in FIG.

In this embodiment, the timepiece section 12 is composed of a power supply section 14 and a timepiece body 34, and the power supply section 14 includes a constant voltage circuit 16 that stably operates a timepiece circuit 66.

A power line drawn out from the power supply section 14 via the constant voltage circuit 16 is connected to the operation section 18.
hour correction switch 32, minute correction switch 24,
A second correction switch 26 is provided, and after passing through a first resistor 20 on one side of the power supply line, each switch is connected so that the hour correction switch 22, minute correction switch 24, and second correction switch 26 are parallel to each other. At this time, the other ends of each of the correction switch 22, the minute correction switch 24, and the second correction switch 26 are connected to the power supply via the first Zener diode 28, the second Zener diode 30, and the third Zener diode 32, respectively. connected to another one of the wires.

The first Zener diode 28, the second Zener diode 30, and the third Zener diode 32
It is preferable to use Zener diodes having different breakdown voltages within the stable operating voltage range of the clock circuit 66, respectively.

One of the power wires via the first resistor 20 and the other power wire to which the first Zener diode 28 , the second Zener diode 30 , and the third Zener diode 32 are connected are led to the watch body 34 and passed through the low-pass filter 64 . The power supply line is connected to the clock circuit 66 via the power line, and the power supply line is also connected to the fluctuation detection circuit 36.

The fluctuation detection circuit 36 includes a reference voltage generation circuit including a resistor and a Zener diode, and the operation section 18.
A reference voltage generation circuit is constructed by inserting a second resistor 38 and a fourth Zener diode 40 in series between both of the power supply lines. At the same time, a third resistor 42, a fourth resistor 44, and so on divide the voltage of the fourth Zener diode 40.
A fifth resistor 46 is connected in series. Then, one input terminal of the first comparator 50 is connected so that the voltage of the fourth Zener diode 40 is used as a reference voltage, and the voltage between the third resistor 42 and the fourth resistor 44 is used as the reference voltage. Similarly, the second comparator 52
One input terminal of the third comparator 54 is connected so as to set a reference voltage between the fourth resistor 44 and the fifth resistor 46. In addition, the power supply line before being connected to the second resistor 38 of the fluctuation detection circuit 36 is connected to the voltage dividing resistor 48, so that the power supply voltage including the operation signal is reduced by the voltage dividing resistor 48. and is connected to the other input terminals of the first comparator 50, the second comparator 52, and the third comparator 54.

Then, each output terminal of the first comparator 50, second comparator 52, and third comparator 54 is led to a decoder circuit 56. The decoder circuit 56 generates a control signal for the clock circuit 66 in accordance with the outputs of the respective comparators, and a third
The output terminal of the comparator 54 is directly connected to the second correction input terminal of the clock circuit 66, and the output terminal of the third comparator 54 is connected to the negative input terminal of the first AND circuit 58 and the negative input terminal of the third AND circuit 62. There is. Further, the output terminal of the second comparator 52 is connected to the other input terminal of the third AND circuit 62, and the output terminal of the third AND circuit 62 is connected to the minute correction input terminal of the clock circuit 66, and the output terminal of the third AND circuit 62 is connected to the minute correction input terminal of the clock circuit 66. 60, the output terminal of the first comparator 50 to the other input terminal of the first AND circuit 58, the output terminal of the first AND circuit 58 to the other input terminal of the second AND circuit 60, The output terminal of the second AND circuit 60 is connected to the time correction input terminal of the clock circuit 66.

The operation of the circuit configured as described above will be explained below.

First, a constant voltage V ₀ is applied from the power supply section 14 via the power supply.
power is supplied to the clock circuit 66, and the clock circuit 66
operates and displays the time. Then, when the hour adjustment switch 22 is connected, the first resistor 2 of the operating section 18
0 and the voltage of the power supply line connecting the operating section 18 and the watch body 34 through the first Zener diode 28.
As _shown in _FIG .
The voltage drops to V ₂ by Zener diode 30,
When the second correction switch 26 is connected, the voltage will drop to _V3 . It is desirable that the voltages V ₁ , V ₂ , and V ₃ fluctuate within an allowable range that allows the clock circuit 66 to operate stably. The voltage is lowered to an appropriate operating voltage by a low-pass filter 64.

Further, the reference voltage of the fourth Zener diode 40 that generates the reference voltage in the fluctuation detection circuit 36 is set to a potential V ₁ ' higher than the potential obtained by dropping the fluctuation voltage V ₁ by the voltage dividing resistor 48, and the third Reference voltage between resistor 42 and fourth resistor 44
V ₂ ' is higher than the potential obtained by reducing the voltage of the variable voltage V ₂ by the voltage dividing resistor 48, and is higher than the potential of the variable voltage V ₁
is set lower than the voltage drop potential by the voltage dividing resistor 48, and the fourth resistor 44 and the fifth resistor 4
The reference voltage V ₃ ′ between V 3 and V 6 is higher than the potential obtained by reducing the voltage V ₃ by the voltage dividing resistor 48,
In addition, it is set lower than the potential obtained by dropping the variable voltage _V2 . Setting such a potential is performed by adjusting the potential of the fourth Zener diode 40 and the voltage dividing resistor 4.
Voltage division ratio of 8 and third resistor 42 to fifth resistor 4
This can be easily set with a resistance value ratio of 6.

As described above, by setting the reference voltage using the fourth Zener diode 40 and the third resistor 42 to the fifth resistor 46, the output signal _A1 of the first comparator 50 is controlled by the time correction switch 2 of the operating section 18.
2. When either the minute correction switch 24 or the second correction switch 26 is connected, an H level signal is generated, and the output signal _A2 of the second comparator 52 is connected to the minute correction switch 24 or the second correction switch 26. When connected, an H level signal can be generated, and when the second correction switch 26 is connected to the output signal _A3 of the third comparator 54, an H level signal can be generated.

Output signals A ₁ , A ₂ , A ₃ of this fluctuation detection circuit 36
is led to the decoder circuit 56, since in the decoder circuit 56 the output of the third comparator 54 is used as the _A6 output signal of the decoder circuit 56,
The _A6 signal generates an H level signal only when the second correction switch 26 is connected, and sends the H level signal to the second correction input terminal of the clock circuit 66. Further, as described above, the output signal _A2 of the second comparator 52 generates an H level signal when the minute correction switch 24 or the second correction switch 26 is connected, but the output terminal of the second comparator 52 is connected to the decoder circuit. 56 is connected to the minute correction input terminal of the clock circuit 66 via the third AND circuit 62 of the second comparator 56.
Since the output signal of the second comparator 54 is used as an input signal and the output signal of the third comparator 54 is used as a negative input,
The _A5 signal, which is the output signal of the third AND circuit 62, goes high only when the minute correction switch 24 is connected.
A level signal is generated and a correction signal is sent to the minute correction input terminal of the clock circuit 66. The output terminal of the first comparator 50 is connected to the fluctuation detection circuit 3.
The output signal A1 of the first comparator 50 is connected to the hour correction input terminal of the clock circuit 66 through the first AND circuit 58 and the second AND circuit 60 of 6, and the output signal _A1 of the first comparator 50 is connected to the hour correction switch 22, the minute correction switch 24, When any of the second correction switches 26 is connected
Although a level signal is generated, since the output terminal of the third comparator 54 is connected to the negative input terminal of the first AND circuit 58, when the second correction switch 26 is connected, the output of the first AND circuit 58 is L. Since the output terminal of the third AND circuit 62 is connected to the negative input terminal of the second AND circuit 60 even when the minute correction switch 24 is connected, the second AND circuit The output of 60 will be maintained at the L level. Therefore, only when the time correction switch 22 is connected, the output signal of the first comparator 50 passes through the first AND circuit 58 and the second AND circuit 60, and the _A4 output signal becomes H.
It is possible to generate a level signal and send the time correction signal to the time correction input terminal of the clock circuit 66.

In this way, in the present invention, the time adjustment switch 2
2. The power supply voltage is varied by signals generated by the intermittent operation of operation switches such as the minute correction switch 24 and the second correction switch 26, and the fluctuations in the power supply voltage are detected and the signals are identified by the decoder circuit 56. Therefore, the signal line between the operating section 18 and the watch body 34 can be omitted, and the connection can be made using only the power line.

Although the low-pass filter 64 provided in series with the clock circuit 66 prevents as much as possible the variation in power supply voltage caused by the switch operation of the operating section 18 from being transmitted to the clock circuit 66, the range of variation is
It is not necessarily required if it is set within the permissible range of 6. However, in the embodiment shown in FIG. 1, a Zener diode is used for the low-pass filter 64, and the power supply voltage is
By making the operating voltage higher than that of clock circuit 66 and widening the fluctuation range of the power supply voltage, it is possible to provide many operating switches, and a stable operating voltage of clock circuit 66 can be obtained.

Also, as an input to the clock circuit 66, the fluctuation detection circuit 3
It is also possible to obtain an input to the clock circuit 66 without voltage fluctuations by using the reference voltage generated in 6.

As shown in FIG. 3, if the power supply section 14 is integrated with the operation section 18, the operation section 18 and the watch body 34
One power line is sufficient for wiring between the two.

[Effects of the invention] This invention has the effect of
Since the intermittent signal based on the on/off of the switch can be sent to the watch body as a fluctuation in the power supply voltage, various switches can be installed in the operation section without increasing the number of wires between the operation section and the watch body. , in an electronic watch in which the operating section and the watch body are separated,
The number of wires between the operating section and the watch body can be reduced, thereby making the wiring easier.

[Brief explanation of the drawing]

Figure 1 is a circuit diagram showing one embodiment of the present invention;
This figure is a time chart when the correction switch in the circuit of FIG. 1 is operated, and FIG. 3 is an external view showing one embodiment of the present invention. 12...Clock section, 14...Power supply section, 16...Operation section, 34...Clock body, 36...Fluctuation detection circuit, 54...Decoder circuit, 66...Clock circuit.

Claims (1)

[Claims for Utility Model Registration] The clock section is composed of a clock section, and an operation section that is configured separately from the clock section and has a plurality of switches to control the display of the clock section; , an electronic watch consisting of a watch body including a watch circuit that measures and displays time, and a power supply unit that supplies power to the watch circuit via a power line, wherein the signal line from the operating unit is connected to the The operation section is connected to a power line from a power supply unit, and the operating unit includes a voltage fluctuation circuit that varies the voltage of the power line to a different level each time each switch is pressed, and detects fluctuations in the voltage level of the power line. An electronic timepiece characterized in that a timepiece main body is provided with both a fluctuation detection circuit for detecting fluctuations, and a decoder circuit for converting an output of the fluctuation detection circuit into a control signal for the timepiece circuit.