JPS5922195B2 - clock with keyboard - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to time adjustment using a numeric keypad.

The present invention provides an electronic timepiece that can be incorporated into, for example, an electronic desk calculator.

Recently, digital electronic watches have been put into practical use that have higher accuracy than mechanical watches and can tell the time digitally.

Conventional time adjustment for electronic watches like this requires that pulses with a pulse interval of 1 second or single pulses be supplied to each counter separately, so the switch for supplying the pulses must be connected to each counter. One unit is required for each unit, and the operation is very troublesome.

For example, if you want to set the number 9, you must hold the switch for 9 seconds or press the switch 9 times.

Recently, it has become possible to consider clocks with calculators that incorporate such digital clocks into electronic desktop calculators.

The present invention provides an electronic timepiece having such a keyboard, in which the time can be easily and accurately adjusted by entering numbers on the numeric keypad.

Hereinafter, the present invention will be explained based on examples.

FIG. 1 is an external view of a calculator watch in which the watch of the present invention is incorporated into an electronic desktop calculator.

Figure 2 shows the control circuit of the computer watch shown in Figure 1.

Figure 3 is a clock correction circuit for the computer watch shown in Figure 1.

FIG. 4 is a display section showing the time adjustment process of the computer watch shown in FIG. 1.

The side switch SW2 is a switch for switching between the functions of the calculator and the clock.

Time information is added and held in a circular loop consisting of an adder circuit 1, a 4-bit shift register 2, AND gates 3 and 5, an OR gate 6, and a 28-bit shift register 7.

The AND gate 9 detects codes of 10 or more, the AND gate 10 detects codes of 6 or more, the AND gate 11 detects codes of 2 or more, and the AND gate 12 detects codes of 3 or more, and sends a signal to the FF 14.

AND gate 13 detects 13 or more codes.

AND gate 15 is a gate that is set at 1 o'clock at 13 o'clock.

Next, time adjustment will be explained.

If you pull the side switch SW1 in Figure 1, it will be in the unlocked state (correction possible), and the wiring input (NH91 in Figure 3) will be activated.
, and the seconds digit starts blinking at 2Hz.

The blinking digit is the correction digit, which is basically 2 digits.

In this state, when the key is pressed, wire B becomes H'' and the minute digit begins blinking.

FIG. 4 shows this state.

In this state, if you press the key again, the wiring becomes H'' and the hour digits start blinking.

The keyhole serves as a select key to select the correction digit.

Minute adjustment will be explained as an example of time adjustment.

FIG. 4a shows a state where 12:34:01 seconds are displayed and the minutes are adjusted.

When the correction digit is selected as the minute digit using the key, the FF 21 is reset by the key and the output Q becomes L''.

In this state, when the key 2 is entered, a BCD signal signal 0100) corresponding to the key 2 is generated and sent to the AND gate 22.

Furthermore, a one-word signal H from D1 to D8 is generated depending on the number set on the key ■, and a number signal E is generated from the AND gate 22 as the second one.
Figure is sent to OR Gate 6.

Further, a reset signal F is sent from the AND gate 23 in FIG. 3, and the AND gate 3 in FIG. 2 is sent from the shift register 2 to inhibit the whole minute information.

Therefore, the minute information becomes 2 minutes, as shown in Figure 4.

(2) When the word signal H is sent, the output Q of the FF 21 becomes 'H'.

- If only the digit is corrected, end here.

In this state, when the key (3) is pressed, the information for 3 is sent to the OR gate 6 in the same way.

Further, the AND gate 3 is activated by the reset signal F to inhibit minute information from the shift register 2.

Furthermore, since the output Q of the FF 21 is now H'', the at gate 24 operates and sends the shift signal G to the AND gate 4.

AND gate 4 sends information from 4-bit shift register 8 to AND gate 5.

In this state, information 2 of the previous one-minute digit is sent.

The digit signal E is always input to the 1 minute digit, and the time information in the 1 minute digit is shifted to the 10 minute digit by the next digit.

Therefore, the minute information becomes 23 minutes, as shown in FIG. 4C.

In this state, if you press the key ■ again, the key (3) will appear.
By the same operation as above, the result is as shown in Fig. 4d.

If the key 1 is further pressed in this state, it will be input in the same way.

However, the minute information is set to 61 minutes, making it a non-existent time.

Therefore, it is detected by the AND gate 10, a 4-bit signal corresponding to the 10th digit is generated by the FF 14, and the 10th digit is reset via the AND gate 5.

With this operation, the time becomes 01 minutes as shown in FIG. 4e.

As described above, when a non-existing time is detected, the upper digits of the non-existing time are reset.

Furthermore, the reset signal of the FF 14 simultaneously becomes a carry signal to the upper digit and is sent to the AND gate 25.
The supply to the adder circuit 1 is inhibited by a 2-word signal that is generated simultaneously and has a time width of 2 words.

That is, when a non-existing time is input using the numeric keypad and a carry signal to the upper digit is generated, the carry to the higher digit is prohibited.

In the hour correction, when 13 o'clock is set, the AND gate 15 is activated by a 2-word signal and the reset signal is prohibited, and the AND gate 16 is activated and the reset signal is sent from FF 17 to the 10 o'clock digit. Therefore, the time information is 3 o'clock.

When correcting the time, when the key ■ is pressed twice, it is FF.
18°19 works and the 1 o'clock digit is 1 from the AND gate 20
A signal is sent to set the clock to 1 o'clock.

In the correction state, when any key is pressed, the state as shown in Figure 4a (the output Q of FF21 is 'L') is reached, and the shift from the lower digit to the upper digit by the first set number is not performed. Not possible.

In the embodiment, the function is only for hours 2 minutes 2 seconds, but the function is not limited to AM/PM.

Similar corrections can be made to the date of February, year, day of the year, etc.

AM/PM can be corrected independently, and in the case of a computer watch, AM/PM can be adjusted by pressing the keys +/-.
- Alternate modification of PM is desirable.

In addition, when correcting the day of the month, it is desirable to display the decimal point in view of the number of terminals, and in this case, it is desirable to display +1 day of the month/1 of the number on the keypad.

The present invention can be used not only for watches but also for adjusting the time using a numeric keypad.

For example, alarm set, timer set for one hour, stopwatch.

It is a time calculation.

As shown in the embodiments above, the correction digit can be corrected by entering the number twice at most.

If you press the wrong number, the shift will continue, so you only need to enter the number again.

You can also set the clear key to return to the initial state and then set the number.

Also, if a non-existent time is entered by mistake, it will not be displayed, so you can correct it with confidence.

In this way, the present invention provides a timepiece that can easily adjust the time and is free from the troublesome adjustment required in the past.

[Brief explanation of drawings]

FIG. 1 is an external view of a calculator watch in which the watch of the present invention is incorporated into an electronic desktop calculator. Figure 2 shows the clock control circuit of the computer watch in Figure 1, and
The figure shows the clock correction circuit of the computer watch shown in Figure 1. FIG. 4 is a display section showing the time adjustment process of the computer watch shown in FIG. 1.

Claims (1)

[Claims] 1. In a clock with a keyboard, which has a keyboard including at least a numeric keypad, and in which the time is adjusted by inputting a number signal corresponding to the number entered on the numeric keypad into the correction digit, a non-existing time is inputted by the numeric keypad. A detection circuit 9゜10.11, 12.15 is provided for detecting a non-existence time, and when the detection circuit detects a non-existence time, the above-mentioned together with means for resetting the upper digits of the non-existence time by the output of the detection circuit are provided. A watch with a keyboard, characterized in that it has means for inhibiting a carry signal to higher digits generated by the output of a detection circuit.