JPH0580164A - Clock indication correcting method - Google Patents

Abstract

PURPOSE:To correct the time to the reference time data simply by receiving the reference time data, correcting first the hour pointer on the basis of the Hr data, and correcting the minute pointer on the basis of the Min data. CONSTITUTION:FF circuits 11, 13 to supply one pulse to a terminal A are reset while a one 12 is set, and a gate circuit 19 is opened to rotate a reversible motor 20 in the regular direction with quick feed pulses given from a terminal B, which puts the Min and Hr pointers in quick feed. When the Min pointer reaches the 30min position, one pulse is generated by a sensor circuit 10, and the output of a comparator circuit 9 is latched by the FF circuits 11-13, and the comparator circuit 9 compares the output A of a Hr pointer sensing device 6 with the output B of a register 4, and if A<B, the motor 20 is rotated in regular direction with the output of the FF circuit 12. and if A>B, reversing is made in fast feed, and A=B causes opening of gate circuits 14, 15. A comparator circuit 8 compares the output of a Min pointer sensing device 7 with the minute reference data of a register 3, and fast feed is alike made until the two are identical. Thereby the indicated time can simply be put in correspondence with the digital reference data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a time correction method for an analog display clock.

[0002]

2. Description of the Related Art Conventionally, for example, in a parent-child clock, the child clock advances a hand by receiving a signal of a constant cycle from the parent clock.

[0003]

In the above, the master clock sends a signal unilaterally to the slave clock, and therefore, if the display time of the slave clock is once displaced by some external force or the like, a manual correction is performed. Unless it was displayed, the display time would be off.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a time adjustment method for a timepiece capable of easily adjusting the display time of an analog display timepiece to digital reference time data.

[0005]

The present invention is based on a reference time data.
Upon receiving the data, the hour hand is corrected first based on the time data at the reference time, and then the minute hand is corrected based on the minute time data.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 is a master clock, which transmits digital data representing hours and minutes. Reference numeral 2 is a receiving circuit for receiving this data, and 3 and 4 are registers for storing minute data and hour data, respectively. Reference numeral 5 denotes a child clock, which displays the time in an analog manner by the hour hand and the minute hand. Reference numerals 6 and 7 are the hour hand detecting device and the minute hand detecting device shown in FIGS. 2 and 3, respectively, and these detecting devices will be described later. Reference numerals 8 and 9 are comparison circuits, and 10 is a detection circuit that generates an output when the minute hand displays 30 minutes, 11 to 13.
Is a flip-flop circuit, 14 to 19 are gate circuits, 2
Reference numeral 0 is a reversible motor drive circuit for driving the minute hand.

In FIG. 2, a disc 22 fixed to the hour hand shaft 21 of the hour hand wheel is provided with a 4-bit through hole 23 representing each hour at a position of 30 minutes of each hour. Four light emitting elements 24 are provided at positions corresponding to the through holes, and four light receiving elements (not shown) are provided at positions facing the light emitting elements with a disc interposed therebetween.

FIG. 3 is for detecting the display position of the minute hand, and the disk 26 fixed to the minute hand shaft 25 of the minute hand wheel has 0.
A 6-bit through hole 27 representing each minute is provided at a position of 59 minutes. These through holes are detected by the six light emitting elements and the light receiving elements provided as in FIG.

Next, the operation will be described. When the timepiece device is started and the time is adjusted, a switch (not shown) is operated to supply one pulse to the terminal A.

As a result, the flip-flop circuit 11,
13 is reset and the flip-flop circuit 12 is set. Therefore, the gate circuit 19 is opened, and the fast-forwarding pulse supplied to the terminal B causes the drive circuit 20 to operate, causing the reversible motor to rotate normally. As a result, the minute hand and hour hand are fast forwarded.

When the minute hand reaches the position of 30 minutes, one pulse is generated from the detection circuit 10 and the output of the comparison circuit 9 at this time is latched by the flip-flop circuits 11 to 13.

On the other hand, in the comparison circuit 9, the output A from the hour hand detection device 6 is compared with the data B of the register 4, and when A <B, that is, when the display time is behind the reference time, The pulse from the detection circuit 10 sets the output of the flip-flop circuit 12 to "1", and the reversible motor 20 is fast forwarded. When A> B, that is, when the display time is ahead of the reference time, the output of the flip-flop circuit 13 becomes "1", and the reversible motor is fast-forwarded in the reverse direction.

When the fast-forwarding is performed for one hour, the detection circuit 10 again generates one pulse. In this way, the same operation as described above is repeated, and the hour hand is fast forward or reverse fast forward. Then, when A = B, the flip-flop circuit 11 is driven by the pulse from the detection circuit 10.
Becomes "1", and the gate circuits 14 and 15 are opened.
On the other hand, in the comparison circuit 8, the output A of the minute hand detecting device 7 and the reference data B of the minute of the register 3 are compared, and if A <B, the reversible motor is normally rotated until they match. Fast forward. When A> B, the reversible motor is fast-forwarded in the reverse direction until they match. In this way, the display times of the hour hand and minute hand are adjusted to the reference data.

In the above embodiment, the display position of the hour hand is detected at the position of 30 minutes every hour, but the present invention is not limited to this.

Further, the detection of the hour and minute hands is not limited to the optical detection as described above, but may be magnetically or by a sliding contact.

[0016]

According to the present invention, the analog time display can be easily adjusted to the digital reference time data,
An accurate analog display time that matches the reference time can be obtained.

[Brief description of drawings]

FIG. 1 is a logic circuit diagram showing an embodiment of a circuit configuration for realizing a time adjustment method of the present invention.

FIG. 2 is a front view showing an example of an hour hand detection device.

FIG. 3 is a partially cutaway front view showing an example of a minute hand detecting device.

[Explanation of symbols]

 3, 4 ... Register 5 ... Child clock 6 ... Hour hand detection device 7 ... Minute hand detection device 8 ... Comparison circuit 9 ... Comparison circuit 10 ... Detection circuit 11-13 ... Flip-flop circuit 20 ... Reversible motor drive circuit

Claims (1)

[Claims] 1. A time adjustment method for a timepiece that analog-displays time by means of an hour hand and a minute hand, wherein reference time data including hour and minute time data is received, and the hour hand is based on the hour time data. A time adjustment method for a clock, characterized in that the display position of the minute hand is corrected based on the time data of the minute.