JP2002071846A - Automatic correction clock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic correction clock capable of monitoring whether time displayed actually by a hand is correct or not. SOLUTION: In the automatic correction clock in which hand driving systems 100 and 200 for driving the hand, a control circuit 300 for controlling the hand driving systems 100 and 200 and a time code reception system 400 for receiving a time code from the outside are provided and the control circuit 300 automatically corrects time displayed by the hand based on the time code, counters 101 and 201 for counting time according to controls of the hand driving systems 100 and 200 and a position sensor 500 for detecting the position of the hand are provided and the control circuit 300 collates time of the counters 101 and 201 and the position of the hand detected by the position sensor 500 at a normal handling of the automatic correction clock.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention includes a pointer driving system for driving a pointer, a control circuit for controlling the pointer driving system, and a time code receiving system for receiving a time code from the outside. The present invention relates to an automatic correction clock that automatically corrects the time displayed by the hands based on a code.

[0002]

2. Description of the Related Art A radio-controlled timepiece which receives a standard time radio wave and corrects the time based on a time code is known as an automatically corrected timepiece for automatically correcting a displayed time.

[0003] Automatic correction watches of this type are also described in, for example, JP-A-6-222164, JP-A-6-258462, JP-A-6-289156 and JP-A-2000-162339.

[0004]

However, in the above-described automatic correction timepiece, it is important to have a reliability that an accurate display is made in seconds.

[0005] However, in the case of an analog timepiece that drives the hands, if an error occurs in the movement of the hands due to a certain condition, such as the influence of hand movement or vibration, the mistake is continued without being eliminated, and the time code is set. Even if received, there is a disadvantage that this cannot be displayed accurately.

That is, the determination of the display time depends on the control of the pointer driving system after the initial setting of the pointer position.
If the pointer is erroneously sent, since it cannot be recognized, an error occurs in the display time.

[0007] In particular, when the pointer is used for a long time without initial setting of the position of the pointer, there is a risk that such feed errors may be accumulated.

Accordingly, the present invention has been made in view of such a problem,
It is an object of the present invention to provide an automatic correction clock capable of monitoring whether or not the time actually displayed by the hands is correct.

[0009]

According to a first aspect of the present invention, there is provided a hand driving system for driving a hand, a control circuit for controlling the hand driving system, and a time code receiving unit for receiving a time code from outside. A control system, wherein the control circuit is an automatic correction clock that automatically corrects the time displayed by the hands based on the time code, wherein a counter that counts time with control of the hands drive system; A position sensor for detecting a position, wherein the control circuit compares the time of the counter with the position of the hands detected by the position sensor during normal hand movement of the automatic correction timepiece. According to such a configuration,
It is possible to monitor the time that the pointer actually displays for errors.

[0010] That is, if an error occurs in the feeding of the pointer due to any condition, it is possible to quickly detect the error, and, as a result, the reliability of the display time is improved.

According to a second aspect of the present invention, in the first aspect, the time of the counter is compared with the position of the pointer detected by the position sensor. Is an automatic correction timepiece configured to correct the position of the pointer by controlling the pointer drive system. According to such a configuration, even if an error occurs in the feeding of the pointer, this is automatically resolved. And the reliability of the display time is further improved.

According to a third aspect of the present invention, in the first or second aspect, the pointer driving system includes a second hand driving system for driving a second hand by a first stepping motor;
An hour / minute hand driving system for driving an hour / minute hand by a stepping motor, wherein the position sensor has a second light transmitting unit in the second hand driving system and a second light transmitting unit in the hour / minute hand driving system, A light-emitting element and a light-receiving element are arranged at positions where the first light-transmitting portion and the second light-transmitting portion overlap with each other. The number of basic steps of the first stepping motor every 60 seconds is X, When the number of basic steps per second is Y, X and Y are natural numbers, and when a and b are natural numbers, they are in the relationship of X = a.Y Y = 60 / b. According to such a configuration, the positions of the second hand and the hour / minute hand serving as hands are efficiently detected.

That is, the first stepping motor steps a times while the second stepping motor steps once, and the second stepping motor steps b times per minute. Therefore, the movements of the second hand drive system and the hour / minute hand drive system are extremely regularly associated with each other, so that the first light transmitting portion and the second light transmitting portion are set efficiently.

In particular, in the present invention, a pair of light emitting elements and light receiving elements are provided for the first light transmitting section and the second light transmitting section, and different light emitting elements and light receiving elements are provided for each of the light transmitting sections. No need.

Here, practical values of X and Y are, for example, X = 60 and Y = 6.

Embodiments of the present invention will be described below in detail with reference to the drawings.

The automatic correction timepiece 1 of this embodiment shown in FIGS. 1 to 16 is a second hand drive system 1 for driving a second hand and an hour / minute hand, respectively.
00 and hour / minute hand drive system 200, and control circuit 300 for controlling second hand drive system 100 and hour / minute hand drive system 200, respectively.
And a time code receiving system 4 for receiving a time code from outside
The control circuit 300 is an analog clock that automatically corrects the time displayed by the second hand and the hour / minute hand based on the time code.

The automatic correction timepiece 1 includes a second counter 101 for counting the time related to the second in accordance with the control of the second hand drive system 100 and an hour / minute counter 201 for counting the time related to the minute in accordance with the control of the hour / minute hand. And a position sensor 500 for detecting the positions of the second hand and the hour / minute hand.
The time of the second counter 101 and the hour / minute counter 201 are compared with the positions of the second hand and the hour / minute hand detected by the position sensor 500.

Then, the times of the second counter 101 and the hour / minute counter 201 are compared with the positions of the hands detected by the position sensor 500, and if they do not match, the control circuit 3
00 corrects the positions of the second hand and the hour / minute hand by controlling the second hand drive system 100 and the hour / minute hand drive system 200.

The control circuit 300 controls the operation of the second hand drive system 100 and the hour / minute hand drive system 200, and is constituted by a microcomputer having a ROM and a RAM storing required programs. A reference clock signal required for the control is output from an oscillation circuit 600 including a crystal oscillator or the like.

The time code receiving system 400 includes an antenna, an amplifier, and the like, and receives a radio wave of a predetermined frequency including a time code. The control circuit 300 automatically corrects the display time at predetermined time intervals based on the time code received by the time code receiving system 400.

Reference numeral 700 in the figure denotes a reset switch for resetting the automatic correction timepiece 1. As will be described in detail later, the reset is performed by collectively performing initial settings of the second counter 101, the hour / minute counter 201, the second hand, and the hour / minute hand.

The reset switch 700 changes the time of the second counter 101 and the hour / minute counter 201 and the positions of the second hand and the hour / minute hand when the automatic correction timepiece 1 obtains power (in this example, immediately after the battery is mounted). In the case of a mismatch, the control circuit 30
Forced by 0. The reset switch 700 can be arbitrarily turned on by the user as needed.

The second hand drive system 100 includes a first stepping motor 1 driven by a pulse output from the control circuit 300.
10 and the rotor 111 of the first stepping motor 110
The fifth stepping motor 120 includes a fifth wheel & pinion 120 meshed with the fifth wheel & pinion 120 and a second hand wheel 130 meshed with the fifth wheel & pinion 120.
The second hand supported by the second hand wheel 130 is driven with a torque of 0.

The hour / minute hand drive system 200 includes a control circuit 3
00, a second stepping motor 210 driven by a pulse, a reduction gear 220 meshed with the rotor 211 of the second stepping motor 210, a third wheel 230 meshed with the reduction gear 220, and a third wheel The minute hand wheel 240 meshed with 230 and the minute wheel 2 meshed with the minute hand wheel 240
50 and an hour wheel 260 meshed with the minute wheel 250, and drives the minute hand supported by the minute hand wheel 240 and the hour hand supported by the hour wheel 260 by the torque of the second stepping motor 210. Things. 270 in the figure is a needle alignment pinion meshed with the minute wheel 250.

The second hand drive system 100 and the hour / minute hand drive system 200 are composed of a case 8 having a first case member 810, a second case member 820, and a middle plate 830.
00 supported inside. First case member 810
Penetrates the pointer shaft, and the middle plate 830 is the first
It is interposed between the case member 810 and the second case member 820.

At the time of normal hand operation of the automatic correction timepiece 1, the first stepping motor 110 steps every one second,
The second stepping motor 210 steps every 10 seconds.

That is, the number of basic steps of the first stepping motor 110 every 60 seconds is 60, which is ten times that of the second stepping motor 210. Further, the basic step number of the second stepping motor every 60 seconds is 6, and 6
It is a divisor of zero. Therefore, the first stepping motor 6
When the number of basic steps per 0 second is X and the number of basic steps of the second stepping motor every 60 seconds is Y, X and Y are natural numbers, respectively. , X = a.YY = 60 / b.

Further, the fifth wheel & pinion 120 of the second hand drive system 100 makes one rotation in 15 seconds, and the second hand wheel 130 makes one rotation in 60 seconds. The third wheel 230 of the hour / minute hand drive system 200 rotates once in 10 minutes, the minute wheel 240 rotates once in 60 minutes, and the hour wheel 260
Makes one revolution in 12 hours.

The position sensor 500 includes first light transmitting portions 121 and 131 in the second hand driving system 100 and a second light transmitting portion 121 in the hour / minute hand driving system 200.
The light-transmitting portions 231, 411, 261 are provided, and the first
The light transmitting portions 121 and 131 and the second light transmitting portions 231 and 241,
The light emitting diode 5 as a light emitting element
10 and a phototransistor 520 as a light receiving element.

The light emitting diode 510 is connected to the control circuit 300
And emits light at a predetermined timing. The phototransistor 520 converts the light of the light emitting diode 510 into an electric signal and outputs the electric signal to the control circuit 300.

The positions of the second hand and the hour / minute hand are determined by the first light transmitting portion 12.
1, 131 and the second light transmitting portions 231, 411, 261 are detected by the output pattern of the phototransistor 520 generated by the overlap.

That is, the position sensor 500 is the fifth wheel 12
0, the first hand wheel 130, the third wheel 230, the minute hand wheel 240, and the first hand wheel 260 provided on the hour hand wheel 260, respectively.
When the light-emitting diode 510 and the phototransistor 520 match with each other, the light-emitting diode 131 and the second light-transmitting parts 231, 241, 261 are detected.

The first light transmitting portions 121 and 131 and the second
The positions of the second hand and the hour / minute hand when the light transmitting portions 231, 411, 261 coincide with each other are arbitrarily set according to the number, shape, combination, and the like thereof.

In the case of this example, the structures of the first light transmitting portions 121 and 131 and the second light transmitting portions 231, 241 and 261 are as follows.

The fifth wheel & pinion 120 is provided with three round hole-shaped first light transmitting portions 121 at 120 ° intervals (see FIG. 6).

The second hand wheel 130 is provided with eleven round hole-shaped first light transmitting portions 131 at intervals of 30 °. One of the intervals between the first light transmitting portions 131 is 60 ° (see FIG. 7).

According to the fifth wheel 120 and the second hand wheel 130, the output state of the phototransistor 520 is such that every time the first stepping motor 110 steps five times from the position where the second hand indicates zero, the 55th step is excluded. Is turned on (see FIG. 8).

On the other hand, the third wheel & pinion 230 is provided with five round hole-shaped second light transmitting portions 231 at intervals of 72 ° (FIG. 10).
reference).

The minute hand wheel 240 is provided with one long hole-shaped second light transmitting portion 241 over a range of 120 ° and two long hole shaped second light transmitting portions 241 over a range of 60 °. I have. 120 °
Of the second light transmitting part 241 at 60 ° with respect to the second light transmitting part 241
Are spaced at 30 °, and the second light transmitting portions 24 at 60 °
The other one is at an interval of 60 °. Further, both of the 60 ° second light transmitting portions 241 are at an interval of 30 ° from each other (FIG. 1).
1).

The hour wheel 260 has one long hole-shaped second light transmitting portion 261 over a range of 77.5 ° and one long hole shaped second light transmitting portion over a range of 60 °. Second over 90 ° range
One translucent portion is provided. 77.5 ° second light transmitting section 26
The distance between the 1st and 60 ° second light transmitting portions 261 is 45 °, and the 60 ° second light transmitting portion 261 and the 90 ° second light transmitting portion 2
The interval between the second light transmitting portion 26 and the second light transmitting portion 26 is 90 degrees.
The distance between 1 and the second light transmitting portion 261 at 77.5 ° is 27.5.
° (see FIG. 12).

The minute hand wheel 240 and the hour hand wheel 260
According to the output state of the phototransistor 520, the hour hand indicates from 11:40 to 2:15, and 3:45.
Between 5:45 and 7:45 to 10: 4
During the period of 5 minutes, 1 hour period from 12:00, 20 hours
ON for 5 minutes, OFF for 5 minutes, ON for 5 minutes, OF for 5 minutes
F, ON for 10 minutes, and OFF for 10 minutes are sequentially repeated (see FIG. 13).

Further, according to the third wheel 230, the output state of the phototransistor 520 is a two-minute cycle from 12:00,
10 seconds ON and 1 minute 50 seconds OFF are repeated.

The outputs of the phototransistor 520 are the fifth wheel 120, the second wheel 130, the third wheel 230, and the minute wheel 24.
0, and when the output state by the hour wheel 260 is ON.

When the output state of the third wheel 230, the minute wheel 240, and the hour wheel 260 is ON during normal hand operation of the automatic timepiece 1, the fifth wheel 12
0 and the output state by the second hand wheel 130 are also turned on.

As shown in FIG. 14, the automatic correction timepiece 1 of the present embodiment performs normal hand movement after being reset, and turns on the light emitting diode 510 at 12:00. Here, if the positions of the second hand and the hour / minute hand are normal, there is an output in the phototransistor 520, and when the control circuit 300 confirms this, the normal hand operation is continued.

If one or both of the second hand and the hour and minute hands are slightly displaced, the output of the phototransistor 520 cannot be obtained, and the control circuit 300
The reset is forcibly performed by turning on the reset switch 700.

As shown in FIG. 15, for resetting, first, the first stepping motor 110 and the second stepping motor 21
0 is appropriately rotated synchronously, and a position where an output is obtained from the phototransistor 520 is searched. Here, the synchronous rotation means that the first stepping motor 110 and the second stepping motor 210 are stepped at the same cycle. FIG. 16 shows the first stepping motor 11
FIG. 9 is an explanatory diagram showing output states of the phototransistor 520 by the fifth wheel & pinion 120, the second wheel & pinion 130, and the third wheel & pinion 230 when the 0 and the second stepping motor 210 are synchronously rotated.

Next, when an output is obtained from the phototransistor 520, the second stepping motor 210 is stopped, and the second hand is returned to zero. The return of the second hand is performed by checking the 55th step from the position where the second hand indicates the zero time by the output pattern of the phototransistor 520 while driving only the first stepping motor 110.

When the return of the second hand is completed, the hour and minute hands are set to 12
Initially set to 4:00, 8:00 or 8:00. In this initial setting, the position of the hour / minute hand indicating any one of 3:45, 7:45 or 11:40 is confirmed by the output pattern of the phototransistor 520 while driving only the second stepping motor. Done by

When the return of the second hand and the initialization of the hour and minute hands are completed, the output of the light emitting diode 510 is stopped.

The lighting of the light emitting diode 510 is controlled by the first
It may be performed intermittently with the driving of the stepping motor 110 and the second stepping motor 210. According to such a configuration, power consumption can be reduced.

Thereafter, the initialization of the second counter 101 and the hour / minute counter 201, the reception of the time code, the start of the second hand and the rapid advance of the hour / minute hand are performed, and the operation shifts to the normal hand operation.

As described above, the automatic correction timepiece 1 of this embodiment is automatically reset when an error occurs in the positions of the second hand and the hour / minute hand, and the reliability of the displayed time is surely improved. Can be.

The position sensor 500 of this embodiment detects the positions of the second hand and the hour / minute hand with the pair of light emitting diodes 510 and the phototransistor 520, and is used when the automatic correction timepiece 1 is reset and during normal hand movement. Can be In particular, compared to the case where different position sensors are provided for the second hand and the hour / minute hand, the configuration can be made more inexpensive.

As described above, according to the automatic correction timepiece of the present embodiment, the counter is provided with a counter for counting the time in accordance with the control of the pointer driving system, and the position sensor for detecting the position of the pointer. Since the time of the counter is compared with the position of the hands detected by the position sensor during the normal operation of the automatic correction timepiece, it is possible to monitor whether there is an error in the time actually displayed by the hands.

In other words, if an error occurs in the feeding of the pointer due to some condition, it can be quickly detected, and the reliability of the display time can be improved.

Further, according to the automatic correction timepiece of the present embodiment, the time of the counter is compared with the position of the hands detected by the position sensor, and if they do not match, the control circuit controls the hands drive system as follows. Therefore, even if an error occurs in the feeding of the hands, this can be automatically eliminated and the reliability of the display time can be further improved.

Further, according to the automatic correction timepiece of the present embodiment, as the hands driving system, a second hand driving system for driving the second hand by the first stepping motor, and an hour / minute hand driving system for driving the hour / minute hand by the second stepping motor. The position sensor is provided with a first light transmitting portion in the second hand drive system and a second light transmitting portion in the hour and minute hand drive system, and a light emitting element at a position where the first light transmitting portion and the second light transmitting portion overlap. And a light receiving element. The number of basic steps of the first stepping motor every 60 seconds is X, and the number of basic steps of the second stepping motor every 60 seconds is Y.
X and Y are natural numbers, respectively, and a and
When b is a natural number, they are in a relationship of X = a.Y Y = 60 / b. Therefore, the positions of the second hand and the hour / minute hand as hands are:
It can be detected efficiently.

That is, the first stepping motor steps a times while the second stepping motor steps once, and the second stepping motor steps b times per minute. Therefore, the movements of the second hand drive system and the hour / minute hand drive system can be related very regularly, and the first light transmitting portion and the second light transmitting portion can be set efficiently.

Next, a second embodiment of the present invention will be described with reference to FIG.

As shown in the figure, the automatic correction timepiece 1 of this example
Is to automatically correct the displacement of one of the second hand and the pointer without resetting. The other configuration is the same as that of the above-described specific example, and the description is omitted.

In this embodiment, the first light transmitting portions 121 and 131 are used.
The time when the second light transmitting portions 231, 241, and 261 match between the light emitting diode 510 and the phototransistor 520 is increased by 10 seconds each time the second stepping motor 210 advances one step, and increases each time the second stepping motor 210 delays by one step. 1
It becomes slower by 0 seconds.

Accordingly, the self-correcting timepiece 1 outputs the light emitting diode 510 every 10 seconds from several tens of seconds before 12:00 (in this example, 11:59:30), and the output of the phototransistor 520 is obtained. By the way, the hour and minute hands are delayed or fast-forwarded according to the advance or delay for 12:00,
It is configured to return to normal hand operation.

When the second stepping motor 210 is delayed or fast-forwarded, the hour / minute hand counter 201 does not count.

In the control of the second stepping motor 210, the case of delaying or fast-forwarding by one to three steps has been illustrated, but it is also possible to adopt a configuration of delaying or fast-forwarding by four or more steps.

On the other hand, when the first stepping motor 110
If the step is advanced or delayed by ４4 steps, the output of the phototransistor 520 cannot be obtained at all.

Therefore, several tens of seconds after 12:00 (in this example, 1
When the output of the phototransistor 520 is not obtained at 2:00:30), the second light transmitting portions 231, 241 and 2
61 is the next matching time (12:02:00 in this example)
In (second), the second stepping motor 210, that is, the hour / minute hand is temporarily stopped, and the second hand is returned to zero.

When the zero return of the second hand is completed, the delay of the hour and minute hands is quickly advanced to eliminate the delay, and thereafter, the operation returns to the normal hand operation.

Further, if both the second hand and the hour / minute hand are displaced, it is impossible to return the second hand to zero. Therefore, if the return of the second hand is not completed even if the second hand is rotated twice, a reset is executed. I do.

As described above, the automatic correction timepiece 1 of the present embodiment can automatically eliminate a feed error in one of the second hand and the hands without resetting.

[0071]

According to the first aspect of the present invention, there is provided a hand driving system for driving a hand, a control circuit for controlling the hand driving system, and a time code receiving system for receiving a time code from outside. A control circuit for automatically correcting a time displayed by the hands based on the time code; a counter for counting time in accordance with control of the hands drive system; and detecting a position of the hands. A position sensor, wherein the control circuit is an automatic correction timepiece having a configuration for checking the time of the counter and the position of the hands detected by the position sensor during normal hand movement of the automatic correction timepiece. According to such a configuration, it is possible to monitor whether there is an error in the time actually displayed by the hands.

According to a second aspect of the present invention, in the first aspect, the time of the counter is compared with the position of the pointer detected by the position sensor. Is an automatic correction timepiece configured to correct the position of the pointer by controlling the pointer drive system. According to such a configuration, even if an error occurs in the feeding of the pointer, this is automatically resolved. And the reliability of the display time can be further improved.

According to a third aspect of the present invention, in the first or second aspect, the pointer driving system includes a second hand driving system for driving a second hand by a first stepping motor;
An hour / minute hand driving system for driving an hour / minute hand by a stepping motor, wherein the position sensor has a second light transmitting unit in the second hand driving system and a second light transmitting unit in the hour / minute hand driving system, A light-emitting element and a light-receiving element are arranged at positions where the first light-transmitting portion and the second light-transmitting portion overlap with each other. The number of basic steps of the first stepping motor every 60 seconds is X, When the number of basic steps per second is Y, X and Y are natural numbers, and when a and b are natural numbers, they are in the relationship of X = a.Y Y = 60 / b. According to such a configuration, the positions of the second hand and the hour / minute hand as hands can be detected efficiently.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a configuration of an automatic correction timepiece according to a specific example of the present invention.

FIG. 2 is an explanatory view showing the inside of an automatic correction timepiece according to a specific example of the present invention.

FIG. 3 is a side sectional view showing an automatic correction timepiece according to a specific example of the present invention.

FIG. 4 is a side sectional view showing a main part of an automatic correction timepiece according to a specific example of the present invention.

FIG. 5 is an explanatory view showing a wheel train of a second hand drive system according to a specific example of the present invention.

FIG. 6 is a front view showing a fifth wheel, according to a specific example of the present invention.

FIG. 7 is a front view showing a second hand wheel according to a specific example of the present invention.

FIG. 8 is an explanatory diagram showing an output state on the second hand drive system side in the position sensor according to a specific example of the present invention.

FIG. 9 is an explanatory view showing a wheel train of an hour / minute hand drive system according to a specific example of the present invention.

FIG. 10 is a front view showing a third wheel according to a specific example of the present invention.

FIG. 11 is a front view showing a minute hand wheel according to a specific example of the present invention.

FIG. 12 is a front view showing an hour wheel according to a specific example of the present invention.

FIG. 13 is an explanatory diagram showing an output state on the hour / minute hand drive system side in the position sensor according to a specific example of the present invention.

FIG. 14 is a flowchart showing control of an automatic correction timepiece according to a specific example of the present invention.

FIG. 15 is a flowchart illustrating resetting of an automatic correction clock according to a specific example of the present invention.

FIG. 16 is an explanatory diagram showing detection states of a fifth wheel, a second hand wheel, and a third wheel when the first stepping motor and the second stepping motor are synchronously rotated according to a specific example of the present invention.

FIG. 17 is a flowchart showing control of an automatic correction timepiece according to a specific example of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automatic correction clock 100 second hand drive system 101 second counter 110 1st stepping motor 111 rotor 120 5th wheel 121 1st light transmission part 130 second hand wheel 131 1st light transmission part 200 hour and minute hand drive system 201 hour and minute hand counter 210 2nd stepping Motor 211 Rotor 220 Speed reducer 230 Third wheel 231 Second translucent section 240 minute hand wheel 241 Second translucent section 250 Hino back wheel 260 Hour wheel 261 Second translucent section 270 Needle setting kana 300 Control circuit 400 Time code reception System 500 Position sensor 510 Light emitting diode 520 Phototransistor 600 Oscillation circuit 700 Reset switch 800 Case 810 First case member 820 Second case member 830 Middle plate

Claims (3)

[Claims] 1. A hand driving system for driving a hand, a control circuit for controlling the hand driving system, and a time code receiving system for receiving a time code from the outside, the control circuit based on the time code An automatic correction timepiece that automatically corrects the time displayed by the hands, comprising: a counter that counts time in accordance with the control of the hands drive system; and a position sensor that detects the position of the hands. An automatic correction timepiece, wherein the time of the counter is compared with the position of the hands detected by the position sensor at the time of normal hand movement of the automatic correction timepiece. 2. The time of the counter is compared with the position of the pointer detected by the position sensor, and when they do not match, the control circuit controls the pointer by controlling the pointer driving system. 2. The automatic correction timepiece according to claim 1, wherein the position of the automatic correction timepiece is corrected. 3. The pointer driving system includes a second hand driving system that drives a second hand by a first stepping motor, and an hour and minute hand driving system that drives an hour and minute hand by a second stepping motor. A second light-transmitting part provided in the second hand drive system, and a second light-transmitting part provided in the hour and minute hand drive system;
A light emitting element and a light receiving element are arranged at positions where the light transmitting portion and the second light transmitting portion overlap each other. The basic step number of the first stepping motor every 60 seconds is X, and the second stepping motor is 60 seconds. When the number of basic steps is Y, X and Y are natural numbers, and when a and b are natural numbers, they are in the relationship of X = a.Y Y = 60 / b. The automatic correction timepiece according to claim 1 or 2, wherein