JPS5926915B2 - analog display electronic clock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an analog display electronic time having an alarm function or a timer function with a built-in buzzer.

Electronic clocks can be broadly classified into digital and analog methods, but both types have an alarm function to notify the set time and a timer function to notify when the set time has elapsed, which are convenient additional mechanisms that utilize the high precision functions of electronic clocks. can fully demonstrate.

However, setting both the alarm time and the hourly timer is quite a tedious operation, especially in analog systems, which require extra pointers on the dial and mechanical contacts. It has major disadvantages such as complexity, low reliability, and inaccuracy, and no one suitable for advanced electronic timepieces has been realized.

The present invention solves this problem and is characterized by setting the alarm time or timer for one hour using a pointer used for time display.

The second hand is the most suitable pointer to use for this time display, so if we take the second hand as an example, the 60
The divided positions are used to set the alarm time or one hour timer.

In other words, if you make the settings when the second hand reaches 25 seconds, 25 seconds will be entered as 5 o'clock as an hour hand, or 25 minutes as a minute hand.

The present invention will be described in detail below based on the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention in electronic time with a timer function.

1 is a crystal resonator, and 2 is an oscillation circuit and a frequency dividing circuit that outputs a 1 second signal.

M uses a step motor to drive the hands on the dial.

Like the step motor, the frequency divider stage 5 receives the 1 second signal of 1. The one-shot signal frequency-divided by /60 is input to the preset down counter 7, and the 12-minute signal of 1/720 is input to the preset down counter 8.

6 is a counter that counts up to 60 seconds and is synchronized with the second hand on the dial.

In other words, when the second hand reaches 00 seconds, the counter 6 always becomes zero.

For this purpose, synchronization means such as mechanical electrical contacts are required, but in recent years electronic watches have been developed that allow 00 seconds to be corrected by wag-touch, making it possible to carry out the present invention.

After the LOCK is released by the control circuit 4 using the setting switch 3, the second hand can be used as an hour hand and the hour digit can be set, and the second hand can be used as a minute hand and the minute digit can be set for one hour.

At this time, the contents of the counter 6 match the position information of the second hand in the hour digit and are preset into two preset down counters: the counter 8 and the minute digit into the counter 7.

After that, 7 is input as a one-shot signal, and 8 is input as a 122 multiplier as a clock, so it gradually counts down, and 7, 8
When both become zero, it is detected by the detection circuit 9, and the buzzer and buzzer drive circuit 10 are operated to emit a timer sound.

However, the down-counting of 7 starts after 8 has been down-counted to zero.

When setting the hour digits, instead of setting the second hand position divided into 60 divisions, it is sufficient to set the 5th division every 5 seconds, so start by inputting the information in 60 divisions, and use the 122 multiplier, which is 5 times faster, instead of the 1 hour signal. to count down.

When setting the hour digits, for example, if one hour is input to the timer as 5 hours, the 25 second position of the second hand will be the target.

In addition, when inputting the minute digit, to avoid the possibility of an error of up to 1 minute if the time is measured from the normal time at the time of input,
Until the LOCK is released and the counter 7.8 is preset, the frequency divider circuit 5 forming the 122 multiplier is also reset, and after the setting → LOCK, the start start and the 122 multiplier are output.

The control circuit 4 also performs ON-OFF setting of the timer.

FIG. 2 shows the relationship between the setting switch 3 and the dial.Using the switch 3, which is provided separately from the crown for normal time adjustment, the timer can be set to one hour for 5 hours and 25 minutes later.

Setting switch 3 has three setting positions: A, B, and C.
, B is stable, and C is closed only while it is pressed and returns to position B when you release your hand.

When this is pulled out as B-+A, LOCK is released and at the time of this operation, one hour is input to the hour digit timer.

Next, the moment the switch is pushed from A to C, an hour is input to the minute digit timer, and when the force is removed from the switch, the spring force returns to B and locks, completing the setting.

In other words, no electrical contact is required at point B.

In this way, the timer can be effectively set for one hour with a single switch.

FIG. 3 is a block diagram of an embodiment of the present invention in an electronic timepiece with an alarm function.

1.2 is a crystal resonator and an oscillation/frequency dividing circuit as in FIG. 1, and the 1 second signal output from 2 is input to a step motor M.

11, 12, 13 are l/60, 1. /60,1
/], which has a frequency division ratio of 2 and forms a counter for seconds, 2 minutes, and 2 hours.

11 to 13 are the same as the second counter 6 in FIG.
It is synchronized with the position of the hands on the dial and has the same content as the normal time on the dial.

Therefore, in FIG. 3, three synchronization means are required.

The output of the counter 11 is input to the counter 12, and the output of the counter 12 is input to the counter 13, so that outputs up to 12 hours can be obtained.

14 and 15 are latch memories, and when setting the hour digits of the alarm time, the upper digits and 1/12 part of the counter 11 synchronized with the second hand by the control circuit 4 are stored in the latch memory 15.
have lunch at

Counter 11 is not just a division ratio of 1/60],
/ 5 x ] and / 12 for the above reason.

Further, in order to enable comparison with the counter 11, the counter 12 is 115×1. /12.

Next, when setting the minute of the alarm time, all the contents of the counter 11 are latched into the latch memory 14.

After the alarm time setting is stored in memory at 14°15 in this way, the coincidence circuit 16 compares the memory in 14 with the counter 12 and the memory in 15 with the counter 13, and outputs the instantaneous output when the above two sets match. send to

Reference numeral 17 denotes an ON-OFF circuit for setting an alarm, and when the alarm is set and turned on, the buzzer and buzzer drive circuit 10 generate an alarm sound in response to the signal 16.

3, the user can set the hour and minute digits from the position of the second hand 18 as shown in FIG. 2, as in FIG. 1.

If you set it to 5:25 in this way, you will get an alarm sound when the normal time is 5:25, and 6:25.
If you set it to 6:29, you will get an accurate alarm sound when the normal time is 6:29.

The present invention is very simple and easy to understand, and it is possible to set a one-hour timer and an alarm time on an electronic clock with an analog display, and it brings about great effects.

In addition, in case you want to call up and know the set timer hour or alarm time, even if it is an analog system, a call switch is provided so that when the second hand is at the set time position, a buzzer will sound. Or, add a lamp and display it by lighting it up.

[Brief explanation of drawings]

Fig. 1 is a block diagram of an embodiment of the present invention in an electronic watch with a timer function, and Fig. 2 is a simplified diagram of the case where the second hand of the present invention is used to set the timer hour or alarm time.
indicates the position of the setting switch. FIG. 3 is a block diagram of an embodiment of the present invention in an electronic timepiece with an alarm function. 1...Crystal resonator, 2...Oscillation, frequency dividing circuit, 3...Setting switch, 4...Control circuit, 5,6゜11~ 13... Counter for frequency division, 7, 8... Preset down counter, 9... Zero detection circuit, 10... Buzzer and buzzer. Drive circuit, 14゜15... Latch memory, 16... Coincidence circuit, 17...
...Alarm setting, 18...Second hand, 0N-OF
F circuit.

Claims (1)

[Claims] 1. In an analog display electronic watch consisting of an oscillation circuit, a frequency dividing circuit, and a step motor that drives a pointer, a setting switch, a counter that synchronizes with the display position of the pointer, and a value of the counter that is set when the setting switch is operated. 1. An analog display electronic timepiece comprising: a preset counter or memory; and a sound alarm device that sounds based on the value of the preset counter or memory.