JPS6027953B2 - alarm electronic clock - Google Patents

Description

[Detailed description of the invention] The present invention relates to an electronic watch with an alarm.

Furthermore, the present invention relates to a two-hand electronic timepiece, although it is not particularly limited thereto. Currently, there are watches with alarms, such as mechanical watches with mechanical or electronic alarms, and digital watches with electronic alarms, but analog electronic wristwatches with electronic alarms are not yet available. I can't find it. Adding a mechanical alarm to an analog electronic wristwatch, which has very few mechanical parts, would be disadvantageous in terms of production or design as it would unnecessarily increase the number of mechanical parts, but even with an electronic alarm, the time can be set using a guide hand. Doing so would increase the number of mechanical parts, which is not desirable. The purpose of the present invention is to provide a method for setting the alarm activation time without relying on a guide hand. An embodiment of the present invention will be described based on the drawings. In Figure 1, 1 is a crystal oscillator, 2 is a frequency divider that divides the output of 1, and J1 and J2 are its outputs. 1 is 512HZ◇2 is IHZ, and both pulse widths are 1/1024 seconds.

3 is an up counter, and the input pulse from 3a is 1.
When the number of pulses for the infant time (43200) is exceeded, a carry pulse is output from 3b, and the output that was 0 until then becomes 1.

4 is a required time counter that measures the time required to set the alarm. To set the alarm, press the switch SWI to fast forward the hands to start counting, and after setting the hands, rotate the hands further until the hands match the time at which counting started. When the count is reached, the count ends.

Gates 40 to 44 and 52 to 55 respectively control counts and input to flip-flops (hereinafter referred to as FF).

A is a counter that counts the pulses applied to the pulse motor PM during normal operation and fast forward operation, and counts the same time in hours, minutes, and seconds as the time indicated by the hands. C is a comparison circuit for counters A and B, and when they match, it outputs to the alarm drive circuit, and D is a comparison circuit for counter A.
Gate circuits 50 and 51 shift the contents of counter A to counter B, and gate circuits 50 and 51 switch the output of counter A to C or D. Next, let us explain the operation of this circuit.

Now, when the switch SWI for switching between normal operation and fast forwarding is turned to the ground side, the output Q4 of FF4 becomes 1, and the world power is differentiated by the differentiating circuit 12, and FF2 is reset.

At this time, the output Q2 of FF2 becomes 1, resets the FFI, and since QI is 1, the AND gate 43 is opened. 2 is CR gate 41
The signal is transmitted to the pulse motor PM via the pulse motor PM and drives it. At this time, a pulse is also applied to the hour, minute, and second counter A so that it always counts the same time as the display hand. When SWI is on the ground side and FFI set output QI is 0,
If the set output Q of FF5 is set to 0, the gate 44 will be closed and there will be no input to the alarm set required time counter 4, and since the gate 54 is also closed,
There is no input to counter 3 either. The gate 40 is also closed because the output of Q4 is 0, and is driven only by the output of the pulse motor PM2. Next, let's consider what happens when SWI is defeated on Voo's side. At this time, the output Q4 of the FF4 becomes 1, and the gate 40 is opened. Furthermore, Q2 of FF2 becomes 0 and F
FI becomes set state. Therefore, since the QI is 0, the gate 43 is closed, and the gates 54 and 44 are opened. As a result, the alarm setting required time counter 4? Start counting with output 2 (1 second pulse),
The input to counter 3 is FF3 and gates 52, 53, 5
4,55. FF3 and gate 53 are S
Set the WI to the Voo side for fast forwarding, set the alarm in the normal 1 second movement to make it easier to set the alarm near the set time, then open the gate 52 while fast forwarding to the time when the SWI was turned on. The counter 3 is caused to count 1 second pulses and fast-forward pulses through an OR gate 55. In other words, the role of counter 3 is as follows. Count the number of pulses to fast-forward to around the alarm setting time and the number of pulses to move the hand exactly 1 second to the alarm setting time, then count the pulses to fast-forward to the alarm setting operation start time, and the alarm setting operation start time has been reached. The contents of the hour counter are just the number of pulses for one hour (
43,200) was counted. So next 1
The counter 3 outputs a carry pulse from the terminal 3b at the pulse of This is a circuit for correction.

This will be discussed later. Since Q4 is 1 during the alarm setting operation, the gate 40 is opened, and the pulse of 512 days 2 of the frequency divider output 01 passes through the gate 41 to the pulse motor P.
512 days is added to the hour, minute, and second counter A at the same time as it is added to the hour, minute, and second counter A. The display hand rotates at 5i2 times the normal operation. When the hand approaches the alarm time desired by the user, set SWI to the ground side and rotate the hour hand at normal speed. When the desired time is exactly reached, the contents of counter A are transferred to counter B using alarm set switch SW2. Move to. After this, VD SWI again. Flip it to the side and fast forward. The hand is returned to the original time when the alarm setting operation was started using a fast-forward pulse, and with the next pulse, the counter 3 overflows and the output of the carry terminal 3b becomes 1, which opens the gate 14 and corrects the correction circuit 18. Add the output of to PM and correct the time to the present.

The correction circuit 18 operates by the number of counts stored in the alarm set time counter 4, ? Comparison circuit 16 and counter 15 for sending a pulse of 1 from gate 14 to gate 17
Consists of. When the carrier output 3b of the counter 3 is 1,
Gate 14 opens and JI's fast forward pulse passes through 14.
Comparison circuit 16 outputs 1 when the contents of counter 4 and counter 15 match. Therefore, until the contents of the counter 4 (which is the time required for setting as described above) and the contents of the counter 15 match by the gate 17, in other words, until the fast forward pulse is sent by the number of counts of the counter 4. , the desk feed pulse is supplied to the PM, but when both counters match, the gate 17 is closed, and at the same time the gate 42 is closed, which opens the gate 43 and the clock resumes normal operation. The counter 4 is determined by the control circuit 21 from when the SWI is first set to the VoD side, after setting the alarm, to the Voo side again, and then back to the ground side? 2 output pulses are counted.

Therefore, if you fast-forward to set the alarm, and after the hand rotates one hour to reach the original time, you can further fast-forward by the required setting time measured by the counter 4, and the corrected return to the current time will be made. That's why. The above operation explanation can be summarized as follows. I Fast forward to the alarm setting time using SWI.

At the same time, the set time counter 4 starts operating. 2 Turn off the SWI just before the set time to return to normal operation.

3 When the set time has arrived, turn on the alarm set switch SW2.

4 Fast forward again.

5. Counter 4 finishes counting when the hand points to the time when the set operation started.

6 The time counted by the same counter 4 is fast-forwarded and when the pointer reaches the current time, it switches to normal operation.

In Fig. 2b, to......The alarm setting operation start time when the hand with the SWI set to the Voo side starts fast forwarding.

L: Time when fast forwarding is temporarily stopped and normal operation is resumed.

ra...Time when fast forwarding started again. and others····
...The time when the fast-forwarding ended. Figure 2a shows the control circuit for the alarm set time measurement counter 4, and Figure 2b shows the control circuit for the alarm set time measurement counter 4.
201 and 202 indicate input and output waveforms. Gate 19 in FIG. 1 has SWI at V. After turning it to the o side, until 1 comes from the carrier output 3b of the counter 3 (that is, while the hand rotates one hour from the set start time) ◇The 1 second pulse of the output of 2 is sent to the counter 4 through the gate 44. FF5 and gate 20 are 20 in Figure 2.
The input to the gate 44 is controlled at timings such as 1 and 202. In the alarm control circuit 22, 50 is open during normal operation, and when the contents of counter A and counter B match by comparison circuit c, output 1 is output to alarm ALM.
issue. When setting the alarm, gate 51 opens and SW2
The contents of A are transferred to B via circuit D. As described above, according to the present invention, 1. Since no mechanical means such as a guide hand is used for alarm setting, there is almost no increase in mechanical parts compared to an electronic watch without an alarm.

2. There is no guide needle, so there is more freedom in terms of design.

There are other effects.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the present invention, and FIG. 2 shows a control circuit for an alarm set time counter, in which 1...crystal oscillator, 2...frequency divider and waveform shaping circuit, 3...up counter, 3a...Input terminal, 3b...Small carrier output, 4
...Alarm set time measurement counter, 5, 40,
42, 43, 44, 14, 19, 50, 51, 52...
AND gate, 41, 20, 53...OR gate, JI
…． ...512Hz output pulse width 1/1024 second signal,
? 2...The pulse width is the same as 1 for IHZ output. 15...512Hz pulse counter, 16...
The comparator outputs 1 when the contents of 4 and 15 match.
21... Counter control circuit, 18...
Correction circuit, 22... Alarm set circuit, A...
...Time counter, B...Set time counter,
SW1...Fast forward switch, D...Circuit that transfers the contents of counter A to B, SW2...Switch D, C...When the contents of A and B match. Comparison circuit that outputs 1, SW3...Alarm operation changeover switch, PM...Pulse motor, ALM...Alarm. Figure Moth Figure 2

Claims (1)

[Claims] 1. In an electronic watch having at least a reference signal generator, a frequency divider, a pointer for displaying normal time, and a motor for driving the pointer, a time counter synchronized with the pointer, and a time counter connected to the frequency divider. drive control means for driving the motor and the time counter with a drive signal having a cycle different from normal using a first operation means; a memory circuit for storing the contents of the time counter by a second operation means; and the memory circuit. an alarm setting circuit having an alarm generation means for detecting a match between the contents of the time counter and the time counter and generating an alarm sound; a measuring means operated by the output of the drive control means to measure the time required for setting the alarm; and the pointer. a correction circuit having a detection means for detecting the position of the pointer, and a driving means for returning the pointer to the current time by cooperation of the measuring means and the detecting means; After the contents of the time counter are stored in the memory circuit by the second operating means in accordance with the alarm time, the correction circuit corrects the time required to set the alarm and drives the motor, thereby adjusting the time of the pointer. An alarm electronic clock whose characteristic is to adjust the display to the current time.