JPS6156794B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an improvement in a time setting device for a digital watch.

BACKGROUND TECHNOLOGY Conventionally, time setting methods for digital clocks have been roughly divided into the following two methods.

First, when the time setting key is pressed, the display sequentially goes up or down, and the time setting key is released at the desired position. A structure using this method is disclosed in Japanese Patent Application Laid-Open No. 52-40171. This configuration is
By moving one winding stem in the axial direction, one of the multiple times of the digital clock to be corrected (hour,
minutes and seconds) and rotate the winding stem to advance or retard the set time.

Next, any number can be entered into each digit of the display section using ten numeric keys (hereinafter referred to as numeric keys) consisting of "0" to "9".

This method is known from Japanese Patent Application Laid-Open No. 130668/1983, and includes a numeric keypad and correction digit designation keys (hours, minutes,
It has a keyboard consisting of a lock switch, and the time is adjusted as follows.

First, the lock switch is unlocked, and then the correction digit designation key is closed. At this point, the correction digit starts blinking and the operator can confirm the correction digit. Next, operate the numeric keypad to adjust the time. At this time, input using the numeric keypad is performed from the lower digit of the correction digit, and when correcting two digits, the previously input information is shifted to the tens digit. Furthermore, when a time that is not originally displayed is entered, only the last operated number signal is input. After the time is adjusted, the lock switch is placed in the locked state and the time adjustment is completed.

Problems to be Solved by the Invention However, in the conventional numeric keypad configuration described above, it is necessary to detect whether there is an error in the set time.
It is essential to have a function to notify the operator of this, and if a mistake is made in the time setting, it is necessary to clear it and redo the time setting. , each digit could not be modified independently.

In addition, with the time setting key system configuration, setting the time takes time and the operator must carefully hold down the key until the desired time appears on the display, and the time can be adjusted in two digits (hours, minutes, seconds). It was done in units.

The present invention solves the above problems, and provides a time setting device for a digital clock with excellent operability, which allows numerical values to be input independently for each digit, and also makes it impossible to input numerical values incorrectly as time. The purpose is to

Means for Solving the Problems In order to achieve this object, the time setting device for a digital watch of the present invention has an operation section arranged corresponding to each digit of the display section and capable of inputting a numerical value of the corresponding digit. Then, the maximum settable value for each digit is switched according to the numerical value of the digit other than the digit to be corrected, and compared with the numerical value input from the operation panel, it is determined that it is impossible to input a numerical value exceeding the maximum settable value. It has a configuration including a determining section.

Effect With the above-described configuration, the time setting device for a digital watch of the present invention has the operation section arranged in correspondence with the display section, so that the operation is easy to understand.
Settings can be made for each digit, and input exceeding the maximum settable value is not possible. After the setting is complete, the correctness of the set time is determined, and in the case of an incorrect input, the incorrect input is cleared and re-entered. You can eliminate tedious operations by typing.

Embodiments Hereinafter, a time setting device for a digital watch according to the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the outline of the present invention. The operating section 1 consists of a time setting key, and sends an input key signal to the determining section 2. As shown in FIG. The judgment unit 2 compares the input numerical signal with the maximum value of the displayed time, and after confirming that it does not exceed this value, the counter 3
Preset to. The contents of counter 3 are displayed on display section 4.
will be displayed. The counter 3 counts the clock pulses input from the clock pulse generator 5 and updates its contents.

Figure 2 shows an example of 8 keys, and the display section 16
Eight setting keys 19a to 19d, two dedicated to each digit, are provided corresponding to the four digits. By holding down or repeatedly tapping each setting key, only the corresponding digit will be updated, counting up or down. This embodiment allows you to input the required number directly into each digit, compared to the conventional system in which all four digits are operated using one or two keys (in this case, "FAST" and "SLW" configurations are common). The setup time is short. It also has fewer keys than a numeric keypad. FIG. 3 shows an embodiment of the 4-key tapping-up method. When the setting key 19 is pressed, a tap counter 20 counts the number of taps and presets it in the counter 14.

Note that the counter 20d is a decimal counter, 20c is a hexadecimal counter, 20b is a decimal counter, 20b' is a ternary counter, and 20a is a binary counter. The third and fourth digits return from 5 to 0 and from 9 to 0, respectively, and in this example no carry is transmitted to the higher order digits. At the second digit, the key tap signal is distributed to a decimal counter 20b and a ternary counter 20b' by AND gates 21, 21'. In other words, the first
If the digit is 0, AND gate 21 opens, and the second digit is 10.
The decimal counter is opened and numbers up to 9 can be entered. If after the first digit is set to 1,
AND gate 21 is closed and AND gate 21' is opened. The second digit is then opened to a ternary counter and only numbers up to 2 can be entered. In the first digit, a 4-bit comparator 8' determines whether the second digit data is greater than the binary code "0010", that is, "2", and if it is greater, the AND gate 22 is closed. Therefore, if a value of 3 or more is set in the second digit, pressing the setting key 19a will be ignored. As described above, according to the present invention, the time can be set from the upper digits, from the lower digits, or even from the middle, regardless of the order of key operations. Of course, a configuration in which the carry signals of each tap counter 20a to 20d are inputted to a higher order counter is also possible.

The contents preset in the counter 14 are as follows:
The decoder 15 converts the data into 7 segment data for display, and displays the data on the display unit 16. Although this embodiment uses a 12-hour clock, it goes without saying that the present invention can also be implemented with a 24-hour clock. In this case, the first digit counter 14a may have a 2-bit configuration. Further, if the 0 pressed in the first digit of a 12-hour meter is not to be displayed, the display section 16a may be constructed of one segment.

It goes without saying that the configuration described above can be realized by soft logic, and can also be applied to a logic circuit using a microcomputer or the like.

Effects of the Invention As is clear from the description of the embodiments above, according to the present invention, by providing an operation section that is arranged corresponding to each digit of the display section and capable of inputting the numerical value of the corresponding digit, , the time adjustment operation becomes easier to understand, and each digit can be entered independently, reducing the time required for time adjustment.

In addition, the maximum value that can be set for each digit is changed from the value of a digit other than the correction digit, making it impossible to enter an incorrect value (for example, 14 o'clock in a 12-hour meter) into the correction digit. This allows the time to be adjusted more reliably.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention;
FIG. 2 is a front view of the same main part, and FIG. 3 is a circuit diagram of the same. 8'...4-bit comparator, 14...Counter, 16...Display section, 19...Setting key, 20
...Tap counter.

Claims (1)

[Claims] 1 A display section that displays at least a ten o'clock digit and an hour digit, and a display section that is arranged corresponding to each digit of the display section,
It consists of an operation section that allows numerical values to be input independently into the corresponding digits, and a judgment section that disables the input of numerical values exceeding the maximum value that can be set for each digit, and the judgment section counts the numerical input of each digit. a comparison means for comparing a reference value for setting the hour digit and a numerical value inputted to the hour digit counting means; and setting of the hour digit based on an output signal of the ten o'clock digit counting means. 1. A time setting device for a digital watch, comprising a switching means for switching the maximum possible value, and a control means for disabling numerical input to the ten o'clock digit based on the output signal of the comparing means.