JPH0359492A - Hand type world watch - Google Patents

Abstract

PURPOSE:To display the time and date of an area by a simple indicating mechanism by specifying an area mark on a dial with an area indication hand and controlling displays of a day and a time by the movement of the hand with the relation between its direction and the international date line. CONSTITUTION:An area is specified with the area indication hand 204 among marks of respective areas which are displayed on the dial 201 and have respec tive local standard times and the time and date of the area are displayed with a dual hand 205 and a day hand 206 for a world time display. At this time, respective hands 204 - 206 are driven by stepping motors which have driving circuits respectively and the numbers of signals driving the hands 204 and 205 are counted to store their positions in a counting means. Then a discriminating circuit means judges in which direction the hands 204 and 205 reach specific positions and a control circuit advances the hand 205 in a corresponding direc tion and advances the hand 206 by one day when the hand 204 passes on the international date line.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pointer-type world clock that displays the date as well as the local time of an arbitrarily selected region.

[Conventional technology]

In recent years, most of the watches produced and sold are pointer type watches, and the demand for such watches is increasing. In addition, in addition to the hour, minute, and second hands, there are many multi-hand, multi-function watches that display stopwatches and timers using the hands, as well as multi-hand, multi-information watches that also display the month and day using the hands, and demand is increasing. This is a growing trend. In this situation, the world clock is no exception, and as part of a multi-hand, multi-information clock, it is equipped with a hand or a disc that rotates once every 24 hours, and is capable of displaying multiple times in one clock. are on the market in large numbers.

[Problem to be solved by the invention]

However, conventional pointer-type world clocks do not have a date, or even if they have a 5-day clock, it is difficult to set the date back, so they only have a mechanism to tell the day in 24 hours, and can only show the time in each region. However, in order to accurately display the date of the specified region, there is a mechanism that allows you to simultaneously change the date at the date line as the region is selected and change the date as time passes. had not yet been proposed.

An object of the present invention is to provide a pointer-type world clock that can display the time and date of a specified region while using a simple display mechanism by proposing the above-mentioned mechanism.

[Means to solve the problem]

The structure of the present invention for achieving the above object is as follows.

5 symbols placed on the dial to indicate multiple regions with different time differences; a region indicator hand that designates a region by pointing to one of the symbols; It has a local time indicator hand that displays the date in '' units, and a date indicator hand that shows the date in a designated area, each of the hands being driven by a step motor with a drive circuit, and the area indicator hand and The counter means stores the position of each of the hands by counting the number of drive signals that drive each of the local time hands, and the counter means stores the position of each of the hands by counting the number of drive signals that drive each of the local time hands. Discrimination circuit means for determining whether a predetermined count number has been reached, increasing or decreasing, and the direction of movement of the local time indicator hand and the local time indicator hand by the discrimination circuit means. A control circuit is provided for controlling the local time pointer, and the control circuit and the discrimination circuit means are configured to cause the local time pointer to step in the opposite direction (forward direction) when the region pointer blade moves westward (eastward). and has a logical configuration that is conditioned to cause the date indicator hand to advance by one day in the forward direction (reverse direction) when the region indicator hand crosses a position corresponding to the date line. do.

[Effect]

Each region on the earth has a local standard time, and is divided into a region group having today's date and a region group having the previous day's date, and the ratio of the two changes as time passes. (If you change the standard and change the region, you can express it as today and the next day.) The date is changed when the local standard time (or the local daylight saving time) reaches midnight, and This is when the selection spans the east and west of the date line, and the amount of change is one day each time, but the increase or decrease depends on the direction of ■.

In the present invention, the above conditions are controlled by a logic circuit to change the date indication in the correct direction.

For details, please refer to the explanation of FIG. 3 in the section of region selection operation and <date change operation> of the first embodiment.

〔Example〕

(1) Correspondence between external appearance and functions, operating members, and switches of the embodiments FIG.
is an electronic clock, 201 is a dial, and on the dial 201 is printed a world map as seen from the North Pole.

The electronic watch 200 has a crown 216 and buttons 211 and 212 and 214 on the side of the electronic watch, and by operating the crown 213 to the second pull position, a switch 606 (to be described later) can be set to the crown 213. Switch 3, which will be described later, is activated by operating it to the 1st pull position.
04, and by operating the region instruction selection button 211, the switch 305, which will be described later, is activated.
Switch 60, which will be described later, is activated by operating button 12.
By pressing the button 214, a switch 607, which will be described later, is operated.

Above the dial 201 is an hour hand 20 for normal time display.
2. A minute hand 206 is attached to the center, and displays the time in conjunction with a printed hour/minute scale 210 that serves as a guide for reading the hours and minutes. Further, a region indicator needle is attached to the center of the dial 201, and together with the city name symbol 208, the indicated city is displayed. Furthermore, the dial 201
At the top, there is a dual hand 205 that displays the world time as a small hand from the center toward 9 o'clock, and a date hand 206 from the center toward 6 o'clock. At the position, along with daily numerals 207, the time and day of the city indicated by the area indicator hand 204 is displayed. It is assumed that there is an international date line on the border between AKL (Auckland) and MDY (Midway) on city name symbol 208.

(2) Circuit configuration of the embodiment FIG. 2 is a circuit block diagram of the embodiment shown in FIG. 1. The components shown in FIG. 2 include a time reference source 600, and a frequency-divided signal p3o for creating the driving pulse period and pulse width based on the output signal from the time reference source 600.
A frequency dividing circuit 601 that outputs l signal groups, a switch circuit 602, a time display means 615, and a region indication selection circuit 622.
and a date display means 626.
, correction means 662, hour and minute hand drive means 642, hour and minute wheel train and pointer 645 interlocked with the hour and minute hand drive means 342, regional pointer drive means 646, and region pointer drive means 646.
A region indicator wheel train and pointer 650 interlocked with the dual pointer drive means 651 , a dual number and pointer 355 interlocked with the dual pointer drive means 351 , a region pointer 204
, when moving from MDY on the city name symbol 208 to AKL, or when the dual hand 205 moves from 2 on the dual number 209.
3 to O and from O to 23, a date hand drive means 666, and a date hand wheel train and pointer 670 that are interlocked with the date hand drive means 666.

The switch circuit 602 further includes switches 306 to 607.
, chattering prevention circuits 608 to 612, INV313
~614. A crown 2 throw signal P is generated from the circuit 608 when the liise 213 is in the 2nd pull state. , is output, and conversely, in a state other than the second pull, the INV313 outputs an inverted crown second throw signal P□3. Similarly, circuits 609 and 614 correspond to the first pull position of the crown 216.
Lineise 1 throw signal P, from. , and a reverse crown single throw signal P, 14 are output. The region instruction selection button 21
1. In response to the button operations of the buttons 212 and 214, the circuits 310, 311, and 312 output a one-shot first push signal psto, second push signal P, 11, and third push signal P3+2.

The time display means 315 further includes a time signal generation circuit 616.
, AND317.0R318, sexagesimal cow/ri619,
It usually consists of a dual signal generation circuit 620.

The region instruction selection circuit 622 further includes an AND 624, a region change signal generation circuit 625, and a dual return signal generation circuit 6.
It consists of 26 pieces.

The date display means 626 further includes AND 327.629
．． 0R328, date advance signal generation circuit 660, and date return signal generation circuit 661.

The correction means 662 further includes 0R333-625, AND
336 to 668, area correction signal generation circuit 669, dual correction signal generation circuit 640, date correction signal generation circuit 64
Consists of 1.

The hour and minute hand drive means 642 further includes an hour and minute hand drive circuit 646.
, the first motor 344 driven by the output signal of the circuit 646.

The region indicator driving means 346 further includes 0R647, the 0
Regional pointer drive circuit 3 which inputs the output signal of R347
48, and a second motor 649 driven by the output signal of the circuit 348.

The dual needle drive means 651 further includes 0R652, the 0
Dual needle drive circuit 6 that receives the output signal of R352 as input
56, and a third motor 654 driven by the output signal of the circuit 656.

The date switch detection circuit 656 further includes 0R357, 360
, a 24-ary counter 658 that receives the 0R357 as an input, a 12-digit detection circuit 659 that receives the output signal of the counter as an input,
The 0R360 is used as the UP signal, and the count signal C526 output from the Puer return signal generation circuit 626 is DOW.
It is composed of a 24-ary counter 661 that inputs the N signal, a 0 detection circuit 662 that receives the counter as input, a 23 detection circuit 366, and AND 3 (54 to 665).

The date hand driving means 666 further includes an 0R367 and a 0R36
7, and a third motor 669 driven by the output signal of the circuit 668.

(3) Operation of the circuit of the embodiment Next, the operation of the circuit block diagram of FIG. 2 will be explained. The watch specifications of this embodiment are such that the hour hand 202 and minute hand 2 are mechanically rotated by rotating the crown 216 with the crown pulled out to the second click.
Normal time adjustment and initialization correction of the regional indicator hand 204 and dual hand 205 are performed for 06, and the date and dual of any region are adjusted for the regional indicator hand 204, Pu'er hand 205, and date hand 206 with the crown pulled out to the first position. The world time is adjusted to adjust the time, and a region designation selection operation can be performed in which the region can be selected with the region indicator hand 204 in the normal use state with the crown in the 0th position and the Pu'er time and date of the designated region can be known.

Operation when the crown is pulled out to the second position> When the crown is pulled out to the second position, the first
When the bushing signal P31° is output, the correction means 362
Now, since the crown 2 throw signal P30j4, which is one input signal of the OR363, is output, the output signal of the OR333, which is one input signal of the AND 356, is at H level, so the first input signal, which is the other input signal of the input ND536, is output. Bush signal P310 is output from AND336. From the region correction signal circuit 669, a predetermined frequency-divided signal P3 (N) is outputted according to the timing of the first push signal P3100 from the AND 336. The correction signal P35. is output, and the signal P18. is supplied to the region pointer drive means 646, thereby driving the region pointer 204 once in the forward direction.On the other hand, the date change detection circuit 356 also The region correction signal P31. is supplied, but the 24-digit counter 658 of the date switch detection circuit 356 is reset by the Liu investment stage signal P8. By having the initialization corrected to match the LON on the name symbol 208, the phase relationship between the region indicator hand 204 and the 24-decimal counter 658 of the date change detection circuit 656 will be correct, and the region indicator hand 204 will become the date change line. MDY and A
This means that it is possible to detect that the vehicle has passed between KL and KL. Similarly, by outputting the second bushing signals P and □ from the switch circuit 602, a dual correction signal P34° is generated from the dual correction signal generation circuit 640 in the correction means 662 to drive the dual hands once in the forward rotation direction. is output and supplied to the dual hand driving means 651, thereby driving the Pu'er hand 205 in the forward rotation direction once, and the 24-decimal counter 661 of the date switch detection circuit 656 receives the crown second throw signal P, . By being reset by 8, the user can set the dual hand 205 to 24 on the dual number 209 as the initial setting, similar to the area indicator hand 204.
It is possible to detect the movement of the dual number 209 from 23 to 24 and from 24 to 23.

The time display means 615 is displayed when the tools are pulled out to the second stage.
, and other circuits such as the drive control circuit 621 do not operate at all.

Operation when the crown is pulled out to the first click When the first push signal P310 is output from the switch circuit 302 when the crown is pulled out to the first click, the correction means 36
2, the crown 1 throw signal P309, which is one input signal of 0R333, is output, and the rest is +7. - Same as in the second stage pullout state, the area corrected needle wound positive signal P33. Based on this, the region indicator hand 204 is driven once in the forward rotation direction. In addition, when the crown is pulled out to the first step, the switch circuit 60
2 to the second psosh signal p3. When I is output, the dual correction signal P340 from the dual correction signal generation circuit 640 of the correction means 362 is activated by the dual correction signal P340 in the dual hand drive means 651 in the same manner as when the regional indicator hand 204 is driven once in the normal rotation direction.
By inputting to , the dual needle 205 is driven once in the forward rotation direction. Similarly, when the date hand 206 is in the state where the crown is pulled out to the first click, the switch circuit 602 outputs the third push signal ps+z, so that the date correction signal P34. By manually applying power to the date hand driving means 666, the date hand 206 is driven once in the forward rotation direction. However, the date change detection circuit 656 is not reset when the crown is pulled out to the first click, and the region pointer correction signals P, 3. , and dual modification signal P1. . By being supplied, the regional pointer correction signal P35. is the 24-digit counter 658, the dual correction signal P34 (+ is passed through the AND '560, and the 24
It is counted by the advance counter 661. Furthermore, the output signal pssa from the 24-ary counter 658 is output as the 12 detection signal P83. becomes H level, and the date display means 626 becomes 0R.
328 and becomes one input of AND327. However, the other input signal of AND 327, inverted +7.
- The crown 1st stage signal P314 is not outputted by the INV 314 when the crown is pulled to the 1st stage. 24-decimal counter 65
8, the output signal P3I from the 24-decimal counter 361
When the detection value of 11 is detected by the 0 detection circuit 362 and the 23 detection circuit 663 from the 24-decimal counter 661, an H level is output from each detection circuit.

When the detection signal P36□ of the 0 detection circuit 662 is output, it is input to one input of the AND364, and the other is outputted with the second push signal P3,1 when the crown is pulled down to the first click, as described above. According to the explanation, the dual correction signal generation circuit 640 also outputs the dual correction signal P34° at H level, that is, the dual correction signal P340
is input as one input of 0R360, and since 0R360 outputs an H level signal P36Q, an H level signal is input. The AND364 outputs the H level signal P8,4, and the AND364 outputs the H level signal P8,4.
Input as a single-handed signal of D327. One of the other three signals of AND627 is the L signal explained in ANf)629 above.
Level inversion crown 1 throw signal P, 84, AND
327 does not output H level. Similarly, detection signals P, 6. is output, AND
Entered as one of the human resources of 365.

The other input of AND3 (S5 is that the L level inverted crown 1 throw signal P5, 4 described above with AND329 is input as one signal of AND324 of the area designation selection circuit 622, so the output of AND324 becomes L level. Dual return signal generation circuit 6260 count signal C826
L level is input without input. Therefore, from AND365,
No signal. In other words, when the first gear is pulled out to the first step,
You can set the current dual time and date for the region you want to set by operating the three buttons 211, 212, and 214, even if the region indicator hand 204 is set to MD.
From Y to AKL Even if the dual hand 205 moves from 23 to 24, there will be no effect on the set date.
The hand positions of the regional indicator hand 204 and the dual hand 205 are stored in two 24-digit counters of the date changeover detection circuit 656.

In addition, when the crown is pulled out to the first click, the time signal generation circuit 616 of the time display means 615 generates the inverted crown second click signals P, 1. Since the output is permitted at H level, the predetermined branch signal P30 is output.

Based on this, time signals P3, 6 with a period of 1 minute are output, and the signal P! By supplying ff16 to the hour and minute hand driving means 641, the minute hand 206 is driven one minute at a time, and the hour hand 202 is also interlocked.

Further, the drive control circuit 621 does not operate when the crown is pulled out to the first position.

Operation when the crown is in the 0th gear> Next, the relationship between the operations of the time display means 315 when the crown is in the 10th gear will be described. The time signal generating circuit 316 performs the same operation as in the above-mentioned one-step pull-down state, and as a result, the minute hand 203 is driven one minute at a time, and the hour hand 202 is also moved in conjunction. AN
The first and second input signals of D317 are the inverted Ryu investment stage signals P, 14 from the switch circuit 602 and the inverted needs 2 investment signal P51. Both are H level, so the third
The 1-minute period time signal P58. from the time signal generation circuit 616 is an input signal of the time signal P58. is output from AND317.

The crown 2 throw signal P from the switch circuit 602 is the first and second input signals of the 0R318. .

and crown 1 throw signal P,. . are both L level,
The output signal from 0R318 to the R input terminal of sexagesimal counter 619 is at L level, and there is no reset.
Time signal P□ from AND317 to I input terminal of 0-base counter 619. A counting operation is performed at a one-minute period based on the following. From the Q output terminal of the sexagesimal counter 619, the time signal P, □ is counted 6 degrees, and when one hour has elapsed, a one hour signal P, 1 degree is output. Normal dual signal generation circuit 3
20, the one hour signal P, 1. A normal dual signal psto with a period of 1 hour is output based on a predetermined frequency-divided signal P3° according to the timing of the signal P8. . is supplied to the dual needle driving means 651, so that the dual needle 205
is driven for 1 hour to indicate what time the dual time is, and the normal dual time P32° becomes one input of 0R360 of the 1 date switching detection circuit 656. The 0R
360 normally outputs the Puer signal P0°,
It is input to the ■ terminal of the 24-decimal counter 661 and one of the AND364.

When the 24-decimal counter 661 becomes 0, the O detection circuit 66
Signal P from 2, 6. becomes H, and H from AND364
A level signal P364 is output. The signals P8, 4 become the output of the AND327 of the date display means 623, and the other two outputs become the inverted Ryu investment stage signals P31. and the inverted)-Z1 stage signal P8, 4, and since it is H in the S-Z O stage state, the AND627 outputs the signal P364.

Furthermore, the signal P1. input to the date advance signal generation circuit 660 advances the date by one day. . and the date hand driving means 665
By supplying the clock, the date can be advanced by one day, and the date can be displayed according to the dual time.

Similarly, when the 24-decimal counter 361 reaches 23, it becomes 2
3 detection circuit 366 detects the signals P, 6. outputs AND
Enter one input of 365. At this time, the other input of the AND 365 is the inverted crown 2 throw signal P30, which is the second and second input of the AND 324 of the region designation selection circuit 622.
5. Since the reversing crown 1 equipment number P8, 4 is at H level in the 10th crown state, the AND324 outputs the third input, and the third input is the first bushing signal P□. Since the count signal C57 from the dual return signal generation circuit 626 is at L level, the L level is inputted because no signal is output from the count signal C57 from the dual return signal generation circuit 626.
No signal is output from ND365.

Region selection operation and date change operation> Now, firstly, the most important part in this embodiment is Ryu 10.
The operational relationship of the drive control circuit 621 will be explained in terms of stages. First, consider schematically the relationship between regions and dates using Figure 3.

In the figure, reference numeral 100 is a map, which is drawn so that each meridian is radial with the north pole 101 as the center, as in the embodiment of figure g1. A mark 102 (the topography is omitted) indicates the direction of London (LON). 106 is the international date line, which is fixedly present between the direction of □ Radway (MDY) and the direction of Auckland (AKL). Reference numeral 104 denotes a moving boundary line representing the boundary line between the area where the current local standard time is in the 24:00 range (that is, the midnight range) and the area where the local standard time is in the 23:00 range (after 11:00 p.m.). The moving boundary line 104 rotates on the earth's surface in the direction of an arrow 105, that is, westward, every 24 hours. 106 is today's area, date line 206
This is an area on the west side and east of the moving boundary line 104.

The date is uniform within this, for example, let it be today.

The remaining portion 107 excluding this today's area 106 is the previous day's area whose date is one day earlier.

The angle of these two sectors increases and decreases with time. Immediately after the moving boundary line 104 passes the date line 103, today's area 106 is only one area and the previous day's area 107 is the majority, but as time passes in the day, today's area 106
The ratio increases, and the midnight line becomes the date line 10 again.
When approaching 6, there is almost only today's area 106,
When the moving boundary line 204 passes the date line 106, 1
A new today's area with the date advanced by one day is generated 1, and the old today's area changes to the previous day's area.

If the above principle is applied to the movement of the hands in the timepiece of the present invention, the date will be changed according to the following rules.

■When the dual hand 7 rotates forward and exceeds the 24-hour scale (either the natural passage of time or manual operation is fine), the date is advanced by one day.

■If the dual hand 7 crosses the 24-hour scale due to reverse rotation, the date will be delayed by one day.

■When the regional indicator hand 5 crosses the date line in a westward direction, the date is advanced by one day.

■If the regional indicator 5 crosses the international date line in an easterly direction, the date will be delayed by one day.

The circuit operation of the present invention is adapted to satisfy these conventions. In this embodiment, the region indicator hand 5 rotates only westward, so the case of ■ does not occur. The operation of the date change detection circuit 118 and related circuits will be explained below.

When the crown is in the 0th position, press the region instruction selection button 21.
1 is operated, the inverted crown 2 throw signal P3m from the switch circuit 602, which is the second input signal of the AND 624, and the inverted crown 1 stage signal P,1
4 are both at ) level, so the first push signal P3 from the switch circuit 602, which is the third input signal! . but,
AND324 is also output. Region change signal generation circuit 6
25 is the first bushing signal P5.25 from the ANI5324.
. In order to drive the region indicator needle 204 once in the forward rotation direction based on the predetermined frequency divided signal P3° according to the timing of
Region change signal pat, which is a one-shot signal that is a drive signal
s is output, and the signal P3□ is sent to the local pointer driving means 6.
46, when the region indicator needle 204 points to a certain city on the city name symbol 208, it appears to the human eye to have moved all the way to the next region. ,
Region is changed. The area change signal P325 is also input to the I terminal of the 24-decimal counter 658 of the date change detection circuit 656, and is added to the count number of the 24-decimal counter 658 that stores the hand position that occurred when the hand position was corrected when the 11th stage of Liu was pulled. To go. As a result, when the 24-decimal count 658 reaches 12, that is, the area indicator hand 204 changes from MDY to A.
When changing to KL, the %12 detection circuit 659 operates,
Detection signal P55. Output. The signal P. is inputted to 0R328 of the date display means 623 and inputted to AND327. Inverted crown 2 throw signal P, 1 from switch circuit 602 which is the first and second input signal of AND327
．． and inverted crown 1 stage signal P, ? 1. Since both are at H level, the detection signal P3 which is the third input of AND327
The AND 327 outputs +1° and inputs it to the date advance signal generation circuit 660. The date advance signal generation circuit 660 outputs a one-shot signal Psso to cause the day hand drive means to advance the date hand 206 by one day in normal rotation.

Also, the dual return signal generation circuit 626 receives the first push button operation P from the AND 324. A denial return signal P3□6 is outputted to drive the dual needle 205 once in the reverse direction based on the predetermined branch point pant timing, and the signal P326 is supplied to the dual needle driving means 651, thereby causing the denial return signal P3 The needle 205 is the regional indicator needle 2
In order to follow the fact that 04 moved one city to the west in the next region, it was reversed once and the dual time display went back one hour.

However, the dual return signals P, 2. Since the count signals C4 and C6 are output at the same time, the date change detection circuit 65
6 is input to the D terminal of the 24-decimal counter 661, and the number of counters stored in the counter 661 is subtracted by one. Due to this, when the 0 detection circuit 662 is activated, the detection signals P, 6. is output and input to one side of the AND 364, but since the U terminal of the 24-ary counter 362 on the other side of the AND 364 is at L level, the signal P364 from the AND 664 is not output. Similarly, 23 detection circuit 36
6 is activated, the detection signal P30. is output, A
Since the input to one of the ND365 and the other signal C3□6 is also H, the output signal P36S of the AND365 becomes H level, and the AND329 of the date display means 326 indicates that both the first and second manual input signals are in the crown 0 position. Inversion at +7.
- Crown 2 stage signal psts, Reversing crown 1 stage signal P5, 4
is H, so the output signal P from the AND365,
6. will be output and input to the date return signal generation circuit 661. The date return signal generation circuit 661
A predetermined branch signal P, according to the signal from D629. 1, a date return signal P, 31 for driving the date hand 206 in the reverse direction once is output, and the signal Psat is supplied to the date hand driving means 366, so that the date hand 206
Only when the dual hand 205 reverses once from 24 to 23 of the dial numeral 209, it is reversed once to follow and the date moves back by one day.

As explained above, when a region change operation is performed using the region instruction selection button 211 in the linen O stage state, the date and dual time (world time) corresponding to the currently selected region are synchronized.

In the present embodiment, the direction of movement of the regional indicator hand 204 is westward, but there is no need to be particular about this, and it may be eastward, or the direction of movement of the regional indicator hand 204 can be changed to the direction of movement operated by other buttons or buttons. Additional circuits may be added to allow movement in either the east or west direction. At this time, for eastward movement, a control circuit may be added that subtracts the 24-decimal counter 658 and returns the date by one day when the 12 detection circuit 659 operates in the subtraction direction.

〔Effect of the invention〕

As described above, according to the present invention, not only the local standard time information of a designated area but also accurate date information can be obtained in the world time display of a pointer type electronic timepiece, thereby increasing convenience in social life.

The user can also learn about the meaning and position of the date line by checking how the date display changes through various manual operations.

For example, there seems to be a one-hour time difference between Auckland and Midway, but it turns out that there is actually a 23-hour time difference, as well as information about the earliest time in the world and how time changes in different parts of the world. It can be easily understood by displaying it in . In this way, by using the analog display, which is the mainstream of electronic watches, it is possible to provide a large amount of information, and also to obtain a watch that is both fashionable and highly practical.

[Brief explanation of drawings]

FIG. 1 is a plan view of an embodiment of the present invention, FIG. 2 is a circuit block diagram of the embodiment, and FIG. 3 is an explanatory diagram showing the relationship between region and date. 204...Region indicator hand, 205...Dual hand, 206...Date hand, 111.212.214...Push button, 216...
... Crown, 600 ... Time reference source, 601 ... Frequency dividing circuit, 602 ... Switch circuit, 615 ... Time display means, 621 ... Drive control circuit, 622 ... Region instruction selection circuit, 626 ...
... Date display means, 662 ... Correction means, 642 ... Hour and minute hand drive means, 646 ... Region indicator hand drive means, 651 ...
...Deal hand drive means, 656...Date switching detection circuit, 358...24-decimal counter, 659...12 detection circuit, 661...24 Advance counter, 362...0 detection circuit, 366...23 detection circuit, 666...Date hand drive means.

Claims (1)

[Claims] Symbols arranged on a dial indicating a plurality of regions with different time zones, a region indicator hand that designates a region by indicating one of the symbols, and a region of the designated region. It has a local time indicator hand that displays the time in units of "hour" at least, and a date indicator hand that shows the date in a designated area, each of the hands being driven by a step motor with a respective drive circuit, and , a counter means for storing the position of each pointer by counting the number of driving signals for driving each of the regional pointer and the local time pointer; Discrimination circuit means for determining from which direction a predetermined count number has been reached, increases or decreases a predetermined count number, and determines from which direction the local time indicator hand and the local time indicator have arrived at the location. A control circuit is provided for controlling the direction of movement of the local time pointer, and the control circuit and the discrimination circuit means move the local time pointer in a reverse direction (positive direction) when the local time pointer moves westward (eastward). a logical configuration that is conditioned to advance the date indicator hand in the forward direction (reverse direction) by one day when the region indicator hand crosses a position corresponding to the date line. A pointer-type world clock characterized by: