JPS6133149B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a time adjustment device for an electronic timepiece that displays the time by moving hands through the rotation of a pulse motor.

Conventional pointer-type electronic watches use a frequency divider circuit to divide the output from an oscillator, such as a crystal oscillator, and use the resulting signal to drive a pulse motor.
It is configured to display the time by driving the hands through a wheel train mechanism. Some watches have been added with a mechanical calendar display mechanism to display calendar information such as the month, date, and day of the week, but in both cases, the mechanism becomes complicated and failures are more likely to occur.
This poses an obstacle to miniaturization and thinning.

Therefore, it has been considered to add a digital display section to the pointer type electronic timepiece and display calendar information on this digital display section. Such an electronic timepiece is provided with a time-based counting circuit and a calendar-based counting circuit, respectively, which count the output of the frequency dividing circuit described above to obtain time information and calendar information. Therefore, in such watches, the time must be set separately for the pointer display section and the digital display section when starting the timekeeping operation after installing the battery, or when a time error occurs. It's a hassle.

This invention was made in view of the above points, and when the time of a pointer-type electronic watch equipped with a digital display is set using the digital display, the pointer display automatically changes to the time on the digital display. can match,
It is an object of the present invention to provide a time adjustment device for an electronic watch that allows the time adjustment of hands to be easily performed.

Hereinafter, the present invention will be specifically explained based on illustrated embodiments. In the figure, 11 is an oscillator that generates a reference signal, and the output of this oscillator 11 is sent to the frequency dividing circuit 1.
The frequency is divided by 2 and the signal with a period of 1 second (1P/S) is 60
is given to the decimal seconds counter 13. This counter 13 counts signals with a period of 1 second and outputs a signal (1P/M) every minute period, which is applied to one input terminal of AND circuits 14 and 15. The frequency dividing circuit 12
A signal with a period of 0.125 seconds (8P/S) is also taken out from the and applied to one input terminal of the AND circuit 16. The outputs of the AND circuits 15 and 16 are sent to a drive circuit 18 via an OR circuit 17 and also to a counter 19. This counter 19 is 60
It consists of a decimal minute counter and a decimal hour counter, and counts 1P/M or 8P/S pulses supplied via the OR circuit 17. The drive circuit 18 shapes the waveform of the signal input via the OR circuit 17, amplifies it, and drives the pulse motor 20.
Drives one step every minute or every 0.125 seconds. As a result, the pointer display section 22 is driven via the wheel train mechanism 21.

Further, in the figure, S ₁ is a function selection switch, and this operation signal is sent to the signal “1” via the OR circuit 23.
is preset only at the first bit and is applied to the shift register 24 as a shift control signal for sequentially shifting the signal "1". The function selection switch _S1 and the shift register 24 constitute a setting means for setting the time adjustment enable state, and when the second bit of the shift register 24 has a "1" signal, the time adjustment state is entered. The first bit output signal of the shift register 24 is applied to the other input terminal of the AND circuit 15, and is also applied to the OR circuit 25.
is applied to one input terminal of the AND circuit 14 through the input terminal, and when the signal "1" is present in the first bit of the shift register 24, a signal of one minute period (1P/M) is sent from the counter 13 to the drive circuit. 18, counter 19
normal timekeeping operation is performed. Also,
The output signal of the second bit of the shift register 24 is supplied to the frequency dividing circuit 12 and the second counter 13 as a reset signal, and is also supplied to the setting circuit 26. The output signal of the second bit is applied to one input terminal of the AND circuit 28 and to one input terminal of the AND circuit 29 via the inverter 27, respectively, as a display switching signal. Further, the output signal of the third bit of the shift register 24 is applied to the other input terminal of the AND circuit 16 and is also applied to the other input terminal of the AND circuit 14 via the OR circuit 25. . The output of the AND circuit 14 is, for example, a time system counting circuit 3 consisting of a sexagesimal minute counter and a decimal hour counter.
It is input to 0. The carry signal of the time-based counting circuit 30 is input to a calendar-based counting circuit 31 consisting of a binary AM/PM counter, a 31-decimal date counter, and a decimal month counter.

The time-based counting circuit 30 and the calendar-based counting circuit 31 output time information and calendar information, respectively, and apply them to the other input terminals of the AND circuits 28 and 29. Further, the outputs of the AND circuits 28 and 29 are given to a decoder/driver 33 via an OR circuit 32, and the signal decoded by the decoder/driver 33 is displayed on a digital display section 34.

In addition, the output of the time system counting circuit and the counter 1
The output of 9 is input to a matching circuit 35, and when the counted value of the time system counting circuit 30 and the counted value of the counter 19 match, the matching circuit 3
A one shot pulse is output from 5. Then, the shift register 24 is shifted by one bit via the OR circuit 23.

In the figure, _{S 2} and S ₃ are time setting switches consisting of a correction digit selection switch and _a correction switch.
The time information presetting means is configured to preset the current time. The correction digit selection switch _S2 selects and specifies the digit to be corrected, and the correction switch _S3 increments the count value of the specified digit to perform the correction. Then, when the output of the second bit of the shift register 24 is given, each digit of the time system counting circuit 30 can be corrected, and at other times, each digit of the calendar system counting circuit can be corrected.

Further, in the figure, the reference numeral 36 is a power supply circuit, and this power supply circuit 36 supplies power to the electronic circuit and also generates a one-shot pulse when the battery is attached to the watch body, and this pulse is sent to the counter. 19 to perform its reset.

In such a configuration, in order to operate the watch, the pointer 37 must be set using a setting means (not shown), such as a reset device, before installing the battery into the watch body.
Set at 12:00 (see Figure 2). Then, when the battery is installed in the watch body, the power circuit 36
A reset signal is outputted to the counter 19, the counter 19 enters the reset state, and the contents of the pointer display section 22 and the counter 19 match. Further, the time-based counting circuit 30 and the calendar-based counting circuit 31 are also reset.

Next, the function switch _S1 is operated to shift the signal "1" in the first bit of the shift register 24 to the second bit. This second bit output signal resets the frequency dividing circuit 12 and the second counter 13, and also resets the inverter 27 and the AND circuits 28 and 29.
and an OR circuit 32, the time count value of the time system counting circuit 30 is applied to the decoder/driver 33 via the AND circuit 28 and the OR circuit 32, and the digital display section 34 Display the time information. (In this case, 0 o'clock
Display 00 minutes. ) At this time, since the signal is also given to the setting circuit 26, the time of the time system counting circuit 30 can be corrected, and the switches _S2 and _S3
The corrected time is set in the time system counting circuit 30 by the operation. (As shown in Fig. 3, for example, the digital display unit 34 displays the set corrected time, 8:15.) If the standard time matches the set corrected time in this state, then The function selection switch _S1 is operated to shift the signal "1" of the second bit of the shift register 24 to the third bit. This third bit output signal starts the time counting operation of the time system counting circuit 30 and calendar system counting circuit 31, and also causes the drive circuit 18 and the counter 19 to start the time counting operation.
A fast forward signal of 8P/S (8 pulses per second) is supplied to fast forward the pointer 37. (See Figure 4). In this case, since the drive circuit 18 and the counter 19 are supplied with the same number of pulses, the time information on the hand display section 22 and the time information on the counter 19 match.

When the count values of the counter 19 and the time system counting circuit 30 match, a one shot pulse is generated from the matching circuit 35, and a shift control signal is given to the shift register 24 via the OR circuit 23, and the first
Shift the signal “1” to the bit. As a result, the fast forwarding ends, and a signal of 1P/M is given to the drive circuit 18 and the counter 19, and the pulse motor 20, the wheel train mechanism 21, and the pointer display section 2
2 starts normal timekeeping operation. Also,
At this time, since a "1" signal is input to the AND circuit 29 via the inverter 27, the count value of the calendar system counting circuit 31 is input to the decoder driver 33 via the AND circuit 29 and the OR circuit 32.
Calendar information is displayed on the digital display. (Refer to Fig. 5, calendar information of April 8th is displayed instead of time information on the digital display section 34.) Note that while the hands are rapidly forwarding, the time system counting circuit 30 and sexagesimal seconds are displayed on the digital display section 34. Since the counter 13 continues its timekeeping operation, time progress during fast forwarding is not hindered, and when they match, the time has been corrected and there is no need for readjustment.

In addition, if an error occurs during normal timekeeping operation, operate function selection switch S ₁ to set the corrected time in time system counting circuit 30, and operate switch S ₁ again (3rd bit is set to "1"), the fast-forward pulse is supplied to the counter 19 and the drive circuit 18 until the contents of the time system counting circuit 30, which counts the accurate time, and the counter 19 match. Set to exact time.

In such an electronic watch, the clock of the pointer 37 is detected by the counter 19, while the corrected time is stored in the time system counting circuit 30, and the fast forward pulse is sent to the pulse motor 20 by simply operating a switch.
When the time detected by the counter 19 matches the corrected time stored in the time system counting circuit 30, the fast forward pulse is blocked and the pointer 37 is returned to normal timekeeping operation. This eliminates the need for troublesome time adjustment by reuse, etc., which is conventionally performed in pointer type electronic watches, and it is only necessary to memorize the corrected time and operate a switch, making the time adjustment operation very simple. Furthermore, the corrected time can be stored digitally, and the accuracy of time setting can be improved.

Note that the content displayed on the digital display section 34 is not limited to the calendar information of the month and day, but may also display seconds, days of the week, or other functions such as alarms, stopwatches, separate clocks, world clocks, etc. You can also do this. Further, the time may be displayed on the digital display section 34 only when setting the time, and nothing may be displayed normally, or a desired function may be selected and displayed by a separate operation. Further, in this embodiment, the pointer section and the digital section can only display hours and minutes, but it goes without saying that a second hand may also be added to this embodiment.

As described in detail above, in this invention, by simply storing the correction time in the storage means and operating a switch, a fast-forward pulse is supplied to the pulse motor until the time on the pointer matches the correction time in the storage means, and the pointer is corrected. This is done automatically, which not only simplifies the operation of setting the time on the hands, but also ensures accuracy.

[Brief explanation of the drawing]

FIG. 1 is a schematic circuit diagram showing an embodiment of the present invention, and FIGS. 2 to 5 are schematic front views of a time display section showing the time setting process separately. 11... Oscillator, 12... Frequency dividing circuit, 13...
Second counter, 18... Drive circuit, 19... Counter, 20... Pulse motor, 21... Wheel train mechanism,
22... Pointer display section, 24... Shift register, 26... Setting circuit, 30... Time system counting circuit, 31... Calendar system counting circuit, 34... Digital display section, 35... Matching circuit, 36 ...power supply circuit, 37... pointer, S ₁ , S ₂ , S ₃ ... switch.

Claims (1)

[Scope of Claims] 1. A pulse motor that rotates each time a drive pulse is supplied, a pointer display means that moves a pointer by the rotation of the pulse motor to display at least hours and minutes, and counts a reference signal. At least when
A time counting means for obtaining minute time information, a date counting means for obtaining date information by counting signals obtained by the time counting means every 24 hours, and an optical display of the date information obtained by the date counting means. A time adjustment device for an electronic watch, comprising: an optical display section that counts driving pulses supplied to the pulse motor and performs a counting operation in synchronization with movement of the hands of the pointer display means; and the above guidelines.
A setting means for setting the counter to the 12:00 position and a reset means for resetting the counter so that the count content of the counter corresponds to the time indicated by the hand; a switching means for switching and displaying time information obtained by the time counting means in place of the date information on the optical display section when the setting means sets the time to be ready for time adjustment; time information presetting means for presetting current time information in the time counting means when set to a state in which correction is possible; and time information presetting means for presetting the current time information in the time counting means; 1. A time adjustment device for an electronic timepiece, comprising: a fast-forward control means that supplies a fast-forward drive pulse to the pulse motor to fast-forward the hands until the hands match the information.