JP2654647B2 - Electronic clock - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to time correction of an electronic timepiece in which hour and minute hands are controlled by independent drive systems.

[Summary of the Invention]

The present invention relates to an electronic timepiece in which the hour and minute hands are controlled by an independent drive system.In the electronic timepiece, when only the hour hand is adjusted at the time of time adjustment, the time data of the minute unit or less is held. Is reset, the time difference can be easily corrected by a normal time correction operation.

[Conventional technology]

In a normal electronic timepiece, when the time correction mode is entered, the hand movement is stopped, and the time division stage is reset. An electronic timepiece that can correct the time difference is disclosed in
Japanese Patent Application Publication (Guideline-type electronic wrist watch) and Japanese Patent Application Laid-Open No. 55-122178 (watch time correction mechanism), using a setting jig around the wheel train and mechanically setting the hour hand alone Correction was possible.

[Problems to be solved by the invention]

In the case of a normal electronic timepiece, the time division mode is always reset when the time adjustment mode is entered. Therefore, when the time difference is adjusted, the correct time (minutes and seconds) from other timepieces is used.
I had to tolerate a delay in the time I had to adjust or adjust the time difference.

In addition, if a correction jig was added to enable mechanical correction of the hour hand independently, the configuration would be more complicated and the number of parts would be increased as compared with a normal electronic timepiece, and an additional jig would be required. There were problems such as a complicated assembly process.

[Object of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to make it possible to easily correct a time difference by a normal time adjustment operation without complicating the configuration by adding a setting jig in at least a timepiece in which hour and minute hands are independently driven. I do.

[Means for solving the problem]

In an electronic timepiece in which each hand can be controlled by an independent drive system in order to solve the problem, when correcting the time, whether the minute hand has been corrected by an integrated circuit (hereinafter referred to as IC) in software or hardware, Judge whether or not the time is corrected, stop the clock only when the minute hand is corrected, reset the contents below the second when the correction mode is released, and continue the timing when only the hour hand is corrected As a result, the time difference can be easily corrected without complicating the mechanical structure or adding a regulating jig.

[Action]

By taking the above means, enter the time correction mode, correct only the hour hand and release the time correction mode, you can correct only the time difference without a second error, and if you have performed the minute hand correction operation even once The second hand is set when the time adjustment mode is released.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The present invention is a single chip dedicated to an analog timepiece having a CPU (logical operation processing circuit), a ROM (read-only memory), a RAM (read-write memory), and a drive circuit capable of independently driving a plurality of display hands. It can be realized by a microcomputer (hereinafter referred to as a one-chip microcomputer) or a random logic IC dedicated to analog clocks. In the former one-chip microcomputer, the processing is performed by means of program processing (software), and in the case of the latter random logic IC, it is realized by means of a combination of logics (hardware). Here, an example of each of the software means and the hardware means will be described.

First, a description of software will be described with reference to FIGS. FIG. 1 is a functional block diagram when the processing is performed by software. The external input member 1 performs an operation from the outside, and uses, for example, a button or a crown. The input signal detection means 2 changes or sets the mode of the electronic timepiece by inputting a signal output from the external input member 1, and recognizes the function of each input for each mode. The time control means 3 gives the correction permission g to the time correction means 4 and the display hand drive signal generation means 8 when the input signal detection means 2 enters the time setting mode, and stops the time when the minute correction is performed. A time stop instruction a is given to the means 5. The time correction means 4 corrects the time,
Only when the correction permission is given when the minute correction is detected, the timekeeping means 6 performs correction by a fixed number at a time.

The clocking stop means 5 normally supplies the clocking basic clock b output from the basic lock generation circuit 7 to the clocking means 6, but when the clocking stop command a from the clocking control means 3 is received, the clocking basic clock b is used. It is not given to the timing means 6. The basic clock generation circuit 7 includes an oscillation circuit 15 and a frequency division circuit 38.

The display hand drive signal generating means 8 receives the output d of the frequency dividing circuit 38, synthesizes the motor drive signal, and normally outputs the motor drive signal e to the external output member 9 based on the timekeeping data c from the timekeeping means 6. Output. The external output member 9 is composed of a motor that drives the display hand when a motor drive signal e output from the display hand drive signal generating means 8 is input.

FIG. 2 is a schematic configuration diagram of the entire one-chip microcomputer.

The one-chip microcomputer 10 includes a ROM 11, a RAM 12, a CPU 13, a frequency dividing circuit 38, an oscillating circuit 15, and a display needle driving circuit 14.
The read-only memory ROM 11 stores a program for each means shown in FIG. The memory RAM 12 stores timed contents and other necessary data, and can be written.

The central processing circuit 13 receives information f and RO from the external input member 1.
A logical operation is performed by a program instruction g from M11, necessary data h is sent to the RAM 12, and a display needle drive signal i is output.

The display hand driving circuit 14 outputs a signal for driving each display hand. The crystal oscillator 16 is a source vibration.

 FIG. 3 is a schematic flowchart of the program.

Next, the operation will be described. In FIG. 2, the external input member 1
When the mode is changed to the time correction mode, the CPU 13
There When receiving a signal f _3, in Figure 1 the input signal detecting means 2
Informs the timekeeping control means 3 that it has entered the time adjustment mode. The time control means 3 sends the correction permission g to the time correction means 4,
It is transmitted to the display needle drive signal generating means.

At this point, the timepiece enters the time correction mode (FIG. 20), and the hours and minutes can be corrected by the switches 17 and 18 of the external input member 1. Here, when the SW 17 is input and the time correction command j is issued by the input signal detecting means 2 (FIG. 21), the clock time of the contents of the time measuring means 6 is corrected by the time correction of the time correcting means 4 and simultaneously displayed. needle drive from the signal generating means 8 hour drive signal e ₁ is output, the clock is driven (third
(Figure 23). If the time setting mode is released by the mode setting switch 19, the correction permission g issued by the timekeeping control means 3 is released and the hour hand and minute hand cannot be corrected (FIGS. 24 → 31 → 32). However, at this time, the time measurement is not stopped because the timekeeping stop command a by the timekeeping control means 3 has not been issued (FIG. 22). Therefore, the time difference can be corrected while holding data of minutes or less in the time data held before the time correction. Next, when SW18 is input and the minute correction command k is issued by the input signal detecting means 2 (FIG. 3)
25), of which component count of the contents of the counting means 6 is the output display hand driving a minute hand driving signal e ₂ from the signal generator 8 corrected by partial compensation of the time correction unit 4, the minute hand is driven (FIG. 3
27). On the other hand, the minute correction command k is also transmitted to the clock control means 3, and the clock control means 3 issues a clock stop command a. In response to this, the clock stop means 5 outputs the clock basic clock b to the clock means 6.
Timing stops by prohibiting entry (Fig. 3
26). Further, the second time content is reset by the instruction 1 for resetting the second time in the time keeping means 6 by the time keeping control means 3, and the second hand is set to the φφ position by the display hand drive signal generating means 8.
The second hand drive signal e ₃ is output for the
It is set (FIG. 28). After setting the minute hand at an arbitrary hand position using the minute hand correction switch 18, the mode setting switch 19
When the time correction mode is released by the above, the clock stop command a output from the clock control means 3 is released, and thereafter, the clock is restarted by the clock basic clock b, and the clock means 6, the display hand drive signal generating means 8, The hands are moved by the external output member 9 (FIGS. 30 → 32).

Therefore, when the minute hand correction is performed, the second hand returns to zero and the time correction mode is released, and then the time starts and the second hand starts moving.

Next, a hardware description will be given with reference to FIG. First
In this embodiment, the independent driving of the hour, minute, and hands by three motors is described as an example. However, the independent driving of the hour, minute, and minute by two motors will be described as an example.

FIG. 4 shows an example of an implementation circuit using random logic. The random logic clock IC 33 includes a frequency dividing circuit 38, an oscillation circuit 1
5, the display needle drive circuit 14, AND gates 34, 35, 36, and DF / F37.

The AND gates 34, 35, and 36 open when the time adjustment mode is set. The DF / F 37 uses the output of the AND gate 35 as data and stores that the minute correction has been performed.

 Next, the operation will be described.

Before the time correction, the AND gates 34, 35, and 36 are all closed, and the DF / F 37 is reset. Therefore, there is no control from the outside to the driving system, the basic clock is transmitted from the oscillation circuit 15 to the frequency dividing circuit 38, and the display needle driving circuit 14 synthesizes the motor driving waveform from the output signal of the frequency dividing circuit 38 and sends it to the external output member 9. A drive signal is issued to move the hands.

Here, when the mode setting switch 19 is input to enter the time correction mode, the reset of the DF / F 37 is released and the data reception state is established, and the time correction permission gates 34, 35 and 36 are opened. Here, when the hour correction switch HF17 is turned on, a signal is transmitted directly from the gate 34 to the hour hand drive circuit, and the hour hand is driven by the hour hand motor of the external output member 9. At this time, there is no control command to the frequency dividing circuit, and time data of minutes or less is held. Next, when the minute hand correction switch MF18 is turned on, the minute hand is driven in the same manner as at the time correction, but the data m with the minute correction is latched in the DF / F 37 and the frequency dividing circuit 38 is reset. Become. After the correction is completed, the DF / F 37 is reset and the reset of the frequency dividing circuit 38 is released, so that the time measurement data
It will start from. Therefore, when the hour correction is performed, the time measurement data of the minute or less is held, and when the minute correction is performed, the time measurement data of the second or less is reset.

〔The invention's effect〕

In the electronic timepiece of the present invention, for example, when traveling abroad by airplane, when the time difference is corrected in the local time, the time is corrected in the time correction mode, and the time data of the current minute or less is held by performing only the time correction. In addition, when the time of the clock is adjusted according to another timepiece such as a time signal, the time is adjusted in most cases, so by performing the same procedure as normal time adjustment, You will be able to keep accurate time. Further, in the electronic timepiece of the present invention, the time difference correction can be easily performed without the necessity of a setting jig peculiar to the time difference correction and without the problem of complicating the assembling process.

[Brief description of the drawings]

FIG. 1 is a functional block diagram of the program processing of the present invention, FIG. 2 is a schematic configuration diagram of a one-chip microcomputer of the present invention, FIG. 3 is a flowchart of the program processing of the present invention, and FIG. It is an implementation circuit diagram in logic. DESCRIPTION OF SYMBOLS 1 ... External input member 2 ... Input signal detecting means 3 ... Time control means 4 ... Time correcting means 6 ... Time measuring means 8 ... Display hand drive signal generating means 9 ... External output member 15 ... Oscillation circuit 37: DF / F that stores data with minute correction 38: Frequency divider circuit

Claims (1)

(57) [Claims] An oscillator circuit for outputting a reference signal; a frequency divider circuit for receiving and dividing the reference signal output from the oscillator circuit; and receiving a frequency-divided signal output from the frequency divider circuit. Clocking means for clocking information on time such as minutes, seconds, etc .; display hand drive signal generating means for inputting a signal output from the clock means and outputting a drive signal for driving a motor; and display hand drive signal generating means A first motor and a second motor that operate by inputting a drive signal output from the first motor, an hour hand that displays time by the operation of the first motor, and a minute hand that displays minutes by the operation of the second motor. An external input member for inputting a signal from the outside, a mode detecting means for setting an operation mode of the electronic timepiece in response to a signal from the external input member, and an hour correction mode or minute correction when the mode detection means operates. In the mode, a signal from the external input member is input to the timing means to output a correction permission signal for driving the first motor and the second motor. An electronic timepiece comprising: a time control means for resetting second data, and time and holding data equal to or less than the minute of said time means during execution and termination of the hour correction mode.