JP2010190714A - Analog electronic clock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To normally run both a time shift function and a pointer position detecting function. <P>SOLUTION: An analog electronic clock includes: a first pointer indication control means for indicating a current time with hands; a pointer position detection means for detecting whether the pointers are located at a predetermined detection position; a pointer position detection control means (S12 to S17) for activating the pointer position detection means at a predetermined detection time; a pointer position correction means (S18) for correcting the pointer position, when it has been detected by the pointer position detection means that the pointers are not located at the detection position; and further includes a storage means for storing deviation time information; a second pointer indication control means for indicating with the pointers a time deviated from the current time by the deviation time stored by the storage means; and a detection time change means (S11, S13) for changing the detection time to the time deviated by the deviation time stored by the storage means. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electronic timepiece having an analog display section.

  There has been an electronic timepiece equipped with a time shift function that always displays a time shifted from a current time by a desired shift time (for example, Patent Document 1). In recent electronic timepieces, for example, a standard radio wave including time information is received, or time information is received from a predetermined time server to automatically correct the time measured inside the timepiece to the current time. ing. For this reason, if there is no function for shifting and displaying the time measured in the clock like the time shift function, it is impossible to always display the time shifted by a desired shift time. According to such a time shift function, it is possible to use the timepiece with the clock advanced by several minutes, or to always display the overseas time by shifting the time difference.

  Further, in recent electronic timepieces, it is confirmed whether or not the position of the pointer is at the detection position (for example, 00:00 every hour) at a predetermined detection time (for example, every hour), and the position of the pointer is deviated from the detection position. In such a case, a needle position detecting function and a needle position automatic correcting function for automatically correcting the position of the pointer have been developed. According to such a needle position detection function and a needle position automatic correction function, for example, a driving signal is output to a motor that rotationally drives the pointer, but the pointer is not rotating, or a driving signal is output to the motor. If the position of the pointer is shifted due to the rotation of the pointer due to impact or the like, the shift can be detected and corrected.

JP 2005-83969 A

  However, when the above-described hand position detection function or the hand position automatic correction function is added to an electronic timepiece having a time shift function, there is a problem in that the hand position cannot be detected normally as it is.

  An object of the present invention is to enable normal operation of both functions while adding a time shift function and a hand position detection function to an electronic timepiece.

In order to achieve the above object, the invention according to claim 1
First pointer display control means for displaying the current time with a pointer;
Needle position detecting means for detecting whether or not the pointer is at a predetermined detection position;
Needle position detection control means for operating the needle position detection means at a predetermined detection time;
Pointer position correcting means for correcting the position of the pointer when the needle position detecting means detects that the pointer is not in the detection position;
In an analog electronic watch with
Storage means for storing information on the deviation time;
Second pointer display control means for displaying, by the pointer, a time deviated from a current time by a deviation time stored in the storage means;
Detection time changing means for changing the detection time to a time shifted by a shift time stored in the storage means;
It is characterized by having.

The invention according to claim 2 is the electronic timepiece according to claim 1,
A time counting means for counting the current time,
The needle position detection control means includes
When the value of the minute digit of the time counting means is updated, it is determined whether or not the counting time of the time counting means is a specified time, and when it is determined that it is the specified time, the hand position detecting means Is configured to operate,
The detection time changing means determines whether or not the deviation time is stored in the storage means when the minute digit value of the time counting means is updated, and when the deviation time is stored, The designated time is configured to change the detection time to a time shifted by the shift time.

The invention according to claim 3 is the electronic timepiece according to claim 1,
The pointer position correcting means includes
The position of the pointer is corrected to a position corresponding to the time when the current time is shifted by the shift time.

The invention according to claim 4 is the electronic timepiece according to claim 1,
A gear having a part to be detected and rotating in conjunction with the pointer,
The needle position detecting means includes
It has a light emitting part and a light receiving part, and detects whether or not the detected part is in a predetermined position by irradiating light from the light emitting part to the gear to determine the light receiving state of the light receiving part, Based on this detection, it is characterized in that it is determined whether or not the pointer is at a detection position.

The invention according to claim 5 is the electronic timepiece according to claim 1,
An operation unit that allows external operation input,
A control unit configured to set information on a deviation time in the storage unit based on an operation input via the operation unit;
It is characterized by having.

The invention according to claim 6 is the electronic timepiece according to claim 1,
Time receiving means for receiving standard radio waves and obtaining time information of the current time;
Time counting means for counting the current time based on the time information acquired by the time receiving means;
With
The first pointer display control means includes
The current time is displayed with a pointer based on the counting time of the time counting means,
The second pointer display control means includes
The shifted time is displayed by the pointer based on the counting time of the time counting means and the shift time stored in the storage means.

  According to the present invention, the time point indicated by the pointer can be displayed shifted from the current time by the second pointer display control means by storing the shift time. Also, the detection of the hand position can be normally performed by the detection time changing means even if the display time is shifted by a time difference.

It is a front view which shows the analog electronic timepiece of embodiment of this invention. It is a longitudinal cross-sectional view explaining the train wheel mechanism of the analog electronic timepiece of FIG. It is the rear view which looked at the several gearwheel which rotates a pointer | guide from the back cover side. It is a front view which shows the structure of the second hand wheel to which the second hand is fixed. It is a front view which shows the structure of the minute hand wheel and intermediate wheel to which a minute hand is fixed. It is a front view which shows the structure of the hour hand wheel to which an hour hand is fixed. It is a block diagram which shows the circuit structure of an analog electronic timepiece. It is a flowchart which shows the control procedure of 1 second signal input processing. It is a flowchart which shows the control procedure of 1 minute carry signal input processing. It is a part of flowchart which shows the control procedure of the needle | hook correction | amendment process performed by FIG.9 S18. This is a branching portion of the flowchart of the needle correction process.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a front view showing an analog electronic timepiece according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of an essential part thereof, and FIG. 3 is a rear view of a plurality of gears for rotating hands as viewed from the back cover side. .

  An analog electronic timepiece 1 according to this embodiment displays time by rotating a hand by electronic control, and is a main body of a table clock or a wristwatch, for example. On the front side of the analog electronic timepiece 1, a dial plate 5 and a solar panel 9 are provided below the windshield glass. In the center of the dial plate 5 and the solar panel 9, through holes 5a and 9a (FIG. 2) are provided for passing the second hand shaft 20a, the minute hand shaft 25a, and the hour hand shaft 27a from the internal mechanism to the front side, and these shafts 20a and 25a. , 27a, the second hand 2, the minute hand 3, and the hour hand 4 are fixed, respectively. As the shafts 20a, 25a, and 27a rotate, the second hand 2, the minute hand 3, and the hour hand 4 rotate on the dial 5, and the time is displayed.

  As shown in FIG. 2, the hour hand shaft 27a to which the hour hand 4 is fixed and the minute hand shaft 25a to which the minute hand 3 is fixed are hollow tubular shafts, and the minute hand shaft 25a is passed through the hour hand shaft 27a. The second hand shaft 20a is passed through the shaft 25a so that the second hand shaft 20a, the minute hand shaft 25a, and the hour hand shaft 27a are rotatable about the same rotation axis.

  The second hand shaft 20 a, the minute hand shaft 25 a and the hour hand shaft 27 a are respectively fixed to the rotation centers of the second hand wheel 20, the minute hand wheel 25 and the hour hand wheel 27 which are arranged to overlap each other on the back side of the dial 5. In FIG. 3, the minute hand wheel 25 and the hour hand wheel 27 are in a state where they cannot be seen overlapping the second hand wheel 20 on the front side. The second hand wheel 20, the minute hand wheel 25 and the hour hand wheel 27 can be rotated around the same rotation shaft.

  FIG. 3 is a diagram of the train wheel as viewed from the back cover side. As shown in FIG. 3, the drive system of the analog electronic timepiece 1 includes a first drive system 11 that rotates the second hand 2, and an hour hand 4. The drive system is separated into a second drive system 12 that rotates in conjunction with the minute hand 3, and the two drive systems 11 and 12 can be driven independently. The first drive system 11 includes a first stepping motor 17, a fifth wheel 18 and a second hand wheel 20, and the movement of the rotor 17c of the first stepping motor 17 is a rotor kana 17d, a fifth wheel 18, a fifth wheel kana. 18a, transmitted to the second hand wheel 20 and configured to rotate the second hand wheel 20 and the second hand 2.

  The second drive system 12 includes a second stepping motor 22, an intermediate wheel 23, a third wheel 24, a minute hand wheel 25, a minute wheel (not shown), an hour hand wheel 27, and the like, and a rotor 22 c of the second stepping motor 22. Motion is transmitted to the rotor kana 22d, the intermediate wheel 23, the intermediate wheel kana 23a, the third wheel 24, the third wheel kana 24a, and the minute hand wheel 25. The minute hand wheel 25 and the minute hand 3, and the hour hand wheel 27 and the hour hand 4 rotate in conjunction with each other by being transmitted to the car pinion 26a (see FIG. 2) and the hour hand wheel 27.

  In FIG. 2, 6 is an upper housing, 7 is a lower housing, 10 is a circuit board, 14 and 15 are bearing plates for holding the shafts of the respective gears, 17a is a coil block of the first stepping motor 17, and 17b is a first housing. A stator of the stepping motor 17, 22 a is a coil block of the second stepping motor 22, and 22 b is a stator of the second stepping motor 22.

  Further, the internal mechanism of the analog electronic timepiece 1 detects the overlapping state of transmission holes as detected portions provided in a plurality of gears (hour hand wheel 27, minute hand wheel 25, second hand wheel 20, intermediate wheel 23). A detection unit 13 is provided. The detection unit 13 includes a light emitting element 31 that emits light when electrically driven, and a light receiving element 32 that receives light and outputs a detection signal. The light emitting element 31 is, for example, a light emitting diode, and the light receiving element 32 is, for example, a phototransistor. In this embodiment, the light emitting element 31 and the light receiving element 32 are arranged on the dial plate 5 side and the back cover side so as to face each other with the plurality of gears interposed therebetween. When the transmission holes formed in the plurality of gears (the hour hand wheel 27, the minute hand wheel 25, the second hand wheel 20, and the intermediate wheel 23) overlap at the detection position P, the light of the light emitting element 31 passes through the transmission hole and is received. It reaches the element 32 and is detected. On the other hand, if the transmission holes formed in the plurality of gears do not overlap at the detection position P, the light of the light emitting element 31 is blocked by the gear and does not reach the light receiving element 32 so that it is detected. .

  The detection position P is set in the direction of 12:00 on the dial 5 from the center of the second hand wheel 20, the minute hand wheel 25, and the hour hand wheel 27.

  FIG. 4 shows a front view of a second hand wheel to which the second hand is fixed.

  As shown in FIG. 4, the second hand wheel 20 is formed with a circular first transmission hole 21 a at a position overlapping the second hand 2, for example. Thereby, when the second hand 2 indicates 0 second, the first transmission hole 21a of the second hand wheel 20 overlaps the detection position P. In addition, the second hand wheel 20 is formed with two second long holes 21b and a third long hole 21c that are long in the circumferential direction on the same radius as the transmission hole 21a. A first light shielding portion 21d is provided between the first transmission hole 21a and the second long hole 21b, and a second light shielding portion 21e is provided between the first transmission hole 21a and the third long hole 21c. The part 21d and the second light-shielding part 21e are set to different lengths. Further, the third light shielding part 21f between the second long hole 21b and the third long hole 21c is set at a position of 180 degrees with respect to the position of the first transmission hole 21a. Specifically, the first light-shielding portion 21d overlaps the detection position P while the second hand 2 points to 1 second to 7 seconds, and the second long hole 21b is detected while the second hand 2 points to 8 seconds to 28 seconds. The third light-shielding portion 21f overlaps with the detection position P while the second hand 2 points to 29 seconds to 31 seconds, and the third long hole 21c overlaps with the detection position while the second hand 2 points to 32 seconds to 50 seconds. The second light-shielding portion 21e overlaps with the detection position P while the second hand 2 indicates 51 seconds to 59 seconds.

  By forming the second hand wheel 20 in this way, when the second hand 2 points to an even second, when the portion overlapping the detection position P is any one of the light shielding portions 21d, 21e, 21f, the second hand wheel 20 from that state. Is rotated 180 degrees, the detection hole P is always overlapped with the transmission hole 21a or the long holes 21b and 21c.

  FIG. 5 shows a front view of the minute hand wheel and the intermediate wheel to which the minute hand is fixed.

  As shown in FIG. 5, one second transmission hole 28 is formed in the minute hand wheel 25. For example, the second transmission hole 28 is formed at a position overlapping the minute hand 3 and on a radius overlapping the detection position P. The intermediate wheel 23 is also formed with one circular fourth transmission hole 30. The fourth transmission hole 30 is also formed on a radius that overlaps the detection position P. The minute hand wheel 25 and the intermediate wheel 23 rotate in conjunction with each other. When the second transmission hole 28 of the minute hand wheel 25 overlaps the detection position P, the fourth transmission hole 30 of the intermediate wheel 23 is also at the detection position P. Combined to overlap.

  FIG. 6 shows a front view of the hour hand wheel to which the hour hand is fixed.

  As shown in FIG. 6, the hour hand wheel 27 includes, for example, a total of 11 positions at a position overlapping the hour hand 4 on the radius overlapping the detection position P, and at a position where the central angle is separated by 30 degrees on the same radius. A third transmission hole 29 is formed. Each of these eleventh third transmission holes 29 is a circular hole, and each hour on the hour hand 4 from 0 o'clock to 10 o'clock (0:00, 1:00 ... 10:00) One of the transmission holes 29 is overlapped with the detection position P. A portion that overlaps the detection position P when the hour hand 4 points to 11:00 is a fourth light shielding portion 29a, and no transmission hole is formed.

  Due to the configuration of the second transmission hole 28 of the minute hand wheel 25, the third transmission hole 29 of the hour hand wheel 27, and the fourth transmission hole 30 of the intermediate wheel 23 as described above, the hands 2 to 4 are 11:00 and 23:00. 1st to 4th transmission holes 21a and 28 in the state indicating each hour (excluding 0:00, 1:00 ... 10:00, 12:00 ... 22:00) 29, 30 overlap at the detection position P. On the other hand, since the fourth light-shielding portion 29a of the hour hand wheel 27 comes to the detection position P at each hour at 11:00 and 23:00, the first to fourth transmission holes 21a, 28, 29, and 30 overlap at the detection position P. Does not occur.

  Further, due to the configuration of the second transmission hole 28 of the minute hand wheel 25, the third transmission hole 29 of the hour hand wheel 27, and the fourth transmission hole 30 of the intermediate wheel 23, the long hole 21b of the second hand wheel 20, While the minute hand 3 and the hour hand 4 are rotated for 12 hours in a state where 21c is arranged at the detection position P, the detection unit 13 detects the open / closed state of the transmission hole while counting the amount of rotation. Overlap of the second to fourth transmission holes 28 to 30 is detected every rotation for one hour excluding the hour, so that the position of the minute hand 3 can be specified. In addition, the overlap of the second to fourth transmission holes 28 to 30 is not detected only once out of the rotation for 12 hours, so that the position of the hour hand 4 can be specified.

  FIG. 7 is a block diagram showing a circuit configuration of the analog electronic timepiece.

  The analog electronic timepiece 1 of this embodiment has the following circuit configuration. That is, the watch movement 8 including the first stepping motor 17 and the second stepping motor 22 and driving the hands 2 to 4 and the gears (second hand wheel 20, minute hand wheel 25, intermediate wheel 23, hour hand wheel 27) A detection unit 13 that detects the overlapping state of the transmission holes, a CPU (Central Processing Unit) 35 that controls the entire timepiece, a ROM (Read Only Memory) 36 that stores control programs and control data, and a CPU RAM (Random Access Memory) 37 that provides a memory space, an oscillation circuit 38 and a frequency dividing circuit 39 that form a timing signal for timing, and a time counting circuit (time) that receives the timing signal and counts the current time (Counting means) 47, a power supply section 40 for supplying power to each section, and an antenna 41 and a time receiving means for receiving and taking in a standard radio wave including time information. A detection circuit 42, a switch unit that performs an operation input from the outside has a plurality of operation switches (operation unit) 44 and the like.

  The CPU 35 drives the timepiece movement 8 based on signals from the frequency dividing circuit 39 and the time counting circuit 47 according to the control program stored in the ROM 36 and moves the hands 2 to 4 to display the time, or drives the detection unit 13 to display the hands. Position detection and needle correction processing to correct the needle position are performed. Further, when there is a designated operation input from the switch unit 44, the shift time is set or the shift time is canceled while the watch movement 8 is driven and information is displayed to the user by the second hand 2. Is supposed to do. When the shift time is set, the shift time information 37a is set in a predetermined area of the RAM 37, and the hands 2 to 4 are fast-forwarded to move the counting time of the time counting circuit 47 to the time shifted by the shift time.

  Further, the CPU 35 acquires time information of the standard radio wave by the detection circuit 42 when the predetermined time comes or when there is a designated operation input from the switch unit 44, and the time counting time of the time counting circuit 47 is obtained. The radio wave receiving process for correcting the current time to the current time is also performed. The CPU 35 functions as first and second time display control means, hand position detection control means, pointer position correction means, and detection time change means.

  The detection unit 13 constitutes a hand position detection unit, and includes a light emitting element 31 such as a light emitting diode and a light receiving element 32 such as a phototransistor as described above, and a plurality of gears (hour hand) at the detection position P. The wheel 27, the minute hand wheel 25, the second hand wheel 20, and the intermediate wheel 23) are arranged to face each other. Whether or not the transmission holes of the hour hand wheel 27, the minute hand wheel 25, the second hand wheel 20, and the intermediate wheel 23 are overlapped at the detection position P by causing the light emitting element 31 to emit light and determining the light reception signal of the light receiving element 32. Whether or not the second hand 2 and the hour / minute hands 3 and 4 are in a predetermined position can be determined.

  The frequency dividing circuit 39 generates a 1-second signal 1 s with a 1-second cycle and outputs it to the CPU 35 and the time counting circuit 47.

  The time counting circuit 47 counts the current time by counting the 1-second signal 1s from the frequency dividing circuit 39. In addition, the time counting circuit 47 counts the 1 second signal 1s 10 times from the time of 0 seconds of the clocking time, and outputs the 10 second carry signal 1h to the CPU 35 every time the 10 second digit value is updated. Is counted 60 times, and every time the minute digit value is updated, the 1-minute carry signal 1m is output to the CPU 35. The time counting circuit 47 is configured to be able to exchange time data with the CPU 35. For example, when the CPU 35 acquires time information from a standard radio wave, the CPU 35 transmits time data based on the time information to the time counting circuit 47. This error is corrected when there is an error in the timekeeping time. Further, if it is necessary for the CPU 35 to check the current time, the time data can be read from the time counting circuit 47 and checked.

  Next, the operation of the analog electronic timepiece 1 having the above configuration will be described.

[1 second signal input processing]
FIG. 8 shows a flowchart of the 1-second signal input process executed by the CPU 35.

  First, the 1-second signal input process executed by the CPU 35 based on the input of the 1-second signal 1s from the frequency dividing circuit 39 will be described. In this process, the display contents of the time are updated by driving the second hand 2 and the hour / minute hands 3 and 4 according to the time count.

  When the 1 second signal 1s is input to the CPU 35 and this process is started, the CPU 35 first supplies a pulse signal to the first stepping motor 17 of the timepiece movement 8 to drive the second hand 2 by 1 step (rotate 6 °). (Step S1), the value of the second hand position in the second hand position storage unit provided in the RAM 37 to store the rotational position of the second hand 2 is incremented by "+1" (Step S2).

  Subsequently, the input of the 10-second carry signal 1h from the time counting circuit 47 is confirmed (step S3). If there is no input of the 10-second carry signal 1h, the 1-second signal input process is terminated as it is.

  On the other hand, if a 10-second carry signal 1h is input, the CPU 35 supplies a pulse signal to the second stepping motor 22 of the timepiece movement 8 to drive the minute hand 3 one step (1 ° rotation) (step S4). Since the hour hand 4 rotates in conjunction with the minute hand 3, the corresponding rotation amount is driven by the driving in step S4. Subsequently, the CPU 35 increments the value of the hour / minute hand position in the hour / minute hand position storage unit provided in the RAM 37 in order to store the rotational positions of the minute hand 3 and hour hand 4 (step S5). Then, this one second signal input process is terminated.

  By such 1-second signal input processing, the second hand 2 and the hour / minute hands 3 and 4 are step-driven with the passage of time, and the display content of the time on the dial 5 is updated. Further, the values of the second hand position storage unit and the hour / minute hand position storage unit are updated as the second hand 2 and hour / minute hands 3 and 4 are driven. Accordingly, when the second hand 2 and the hour / minute hands 3 and 4 are set in advance at the current time, the display control (first control) is performed so that the current time is displayed on the dial 5 by the one-second signal input processing. The pointer display control means) is made. If the hour and minute hands 3 and 4 are set in advance at the time obtained by shifting the current time by the shift time, the time shifted by the shift time is displayed on the dial 5 by the 1 second signal input process. In addition, display control (second pointer display control means) is performed.

[1-minute carry signal input processing]
FIG. 9 shows a flowchart of a one-minute carry signal input process executed by the CPU 35.

  Next, the 1-minute carry signal input process executed by the CPU 35 based on the input of the 1-minute carry signal 1m from the time counting circuit 47 will be described. In this process, the needle position detection process and the needle correction process are performed at the timing of executing the needle position detection.

  When the 1-minute carry signal 1m is input to the CPU 35 and this process is started, the CPU 35 first checks whether or not the shift time information 37a is stored in the RAM 37 (step S11). If it is not stored as a result, the process proceeds to step S12 to determine whether or not the time counting time of the time counting circuit 47 is the correct time (00 minutes per hour) as the designated time for detecting the hand position (needle position detection control means). ). On the other hand, if the shift time information 37a is stored, the process proceeds to step S13, and it is determined whether or not the time obtained by adding the shift time to the time measured by the time counting circuit 47 as the designated time for detecting the hand position is the normal time. . The detection time changing means is constituted by the processing of step S11 and step S13.

  As a result of the determination processing in step S12 or step S13, if it is not the corresponding designated time, the one-minute carry signal input processing is terminated as it is.

  On the other hand, if the result of the determination process in step S12 or step S13 is the corresponding designated time, the process proceeds to the hand position detection process from step S14.

  When the process proceeds to the needle position detection process from step S14, the CPU 35 first causes the light emitting element 31 of the detection unit 13 to emit light (step S14). Next, it is determined whether or not the designated time compared in step S12 or step S13 is 11:00 or 23:00 (step S15). If it is 11:00 or 23:00, it is determined in step S17 whether or not the light receiving element 32 is not receiving light, and if it is any other time, the light receiving element 32 receives light in step S16. It is determined whether or not there was.

  This is because the transmission hole 21a of the second hand wheel 20, the transmission hole 28 of the minute hand wheel 25, and the transmission hole 29 of the hour hand wheel 27 are overlapped at the detection position P every hour except for 11:00 and 23:00. , 11 o'clock and 23 o'clock on each hour, the light-shielding portion 29a of the hour hand wheel 27 overlaps the detection position P and closes the transmission hole, so that it is determined whether or not these states can be detected.

  If the determination result in step S16 or step S17 is YES, it is determined that the hand position is accurate, and the one-minute carry signal input process is terminated as it is. On the other hand, if the determination result in step S16 or step S17 is NO, it is determined that the needle position is in the wrong position, and the process proceeds to the needle correction process in step S18. Then, after the hand correction process is completed, the one-minute carry signal input process is terminated.

  When the hand position detection is executed at a predetermined detection time (every hour) by the 1-minute carry signal input process as described above, and the shift time information 37a is stored in the RAM 37, the detection is performed. The hand position is detected with the time shifted by the shift time.

[Needle correction processing]
10 and 11 show a flowchart of a subroutine process of the needle correction process executed in step S18 of FIG.

  As a result of the above-described detection of the hand position, if it is determined that the positions of the hands 2 to 4 are not correct and the process proceeds to the hand correction process, first, a pulse signal for moving the second hand 2 to the even second position is sent to the first stepping motor 17. When the second hand 2 is in the odd second position, the second hand 2 is moved to the even second position (step S21).

  In the hand correction process, the position of the second hand wheel 20 is detected only at even second positions every two steps. In the two-pole stepping motor, which of the two stationary positions of the rotor corresponds to an even number of seconds and which corresponds to an odd number of seconds is determined in advance by the polarity of the supplied pulse. Therefore, by supplying the first stepping motor 17 with a polarity pulse corresponding to even seconds, the rotor 17c is brought into a stationary state for even seconds.

  Next, the CPU 35 rotates the second hand 2 two steps (12 °) (step S22), causes the light emitting element 31 of the detection unit 13 to emit light (step S23), and the light receiving element 32 can receive the light of the light emitting element 31. It is determined whether or not (step S24). As a result, if light cannot be received, it is determined whether or not the second hand 2 has been rotated 60 steps (one turn) (step S25). If it has not been rotated 60 steps, the process returns to step S22, and step S22. → Step S23 → Step S24 → Step S25 → Step S22 is repeated until it is determined in step S24 that light has been received or in step S25 it is determined that light has been rotated by 60 steps.

<Only the position of the second hand 2 is inaccurate and the positions of the hour and minute hands 3 and 4 are accurate>
If only the second hand 2 is inaccurate and the hour / minute hands 3 and 4 are accurate, it is determined that there is light reception in step S24 during 60 steps of the second hand 2, that is, one round. Therefore, in step S26 in the discrimination process in step S24. Then, the correction process for only the second hand 2 is executed.

  When the process proceeds to step S26, first, the second hand 2 is rotated two steps (12 °) (step S26), the light emitting element 31 of the detector 13 is caused to emit light (step S27), and the received light after four consecutive non-light receptions is detected. (Step S28), if it is not non-light-receiving after four consecutive light receptions, it is determined whether or not 60 steps, that is, whether or not the second hand 2 has been driven once (step S29). Return to S26.

  The reason for detecting the light reception after four consecutive non-light receptions is that the second hand wheel 20 has a second light shielding portion 21e formed at a portion overlapping the detection position P between 51 seconds and 59 seconds, and is detected at 00 seconds. Since the circular first transmission hole 21a is formed at the position overlapping with the position P, no light is received in the four consecutive steps in which the second hand 2 is rotated to the positions of 52 seconds, 54 seconds, 56 seconds, and 58 seconds. This is because light is received at the step rotated to the position of 00 seconds.

  Then, Step S26 → Step S27 → Step S28 → Step S29 → Step S26 is repeated, and when light reception after four consecutive non-light receptions is detected, the current second hand 2 position is 00 seconds, so the second hand position storage section The value of the second hand position is reset to “0” (step S30). As a result, the second hand 2, the minute hand 3, and the hour hand 4 are in the correct positions, and the process proceeds to the subsequent step S31.

  Step S31 is a process of moving the positions of the hands 2 to 4 to the original display time positions because the accurate positions of the hands 2 to 4 have been found in the previous stage. When the process proceeds to step S31, first, it is confirmed whether the shift time information 37a is stored in the RAM 37. If the shift time is not stored, the destination time is set as the current time counted by the time counting circuit 47. . On the other hand, if the shift time is stored, the destination time is set to the time obtained by shifting the current time measured by the time counting circuit 47 by the shift time. Then, the second hand 2, the minute hand 3, and the hour hand 4 are moved to the destination time.

  That is, a process of supplying one drive pulse to the first stepping motor 17 to rotate the second hand 2 by one step and “+1” the value of the second hand position storage unit is performed. The second hand 2 is moved to the second position of the display time by repeating until the second coincides. Similarly, a process of supplying one drive pulse to the second stepping motor 22 to rotate the minute hand 3 by one step and “+1” the value of the hour / minute hand position storage unit, and setting the value of the hour / minute hand position storage unit to the hour The hour hand 4 and the minute hand 3 are moved to the hour / minute position of the display time by repeating until the data converted into the minute value coincides with the hour / minute of the destination time.

  If it is determined in step S28 that the second hand 2 has been driven 60 steps in step S29 before the detection of light reception after four consecutive non-light receptions is determined, an error process is performed (step S32). ).

<When the position of the hour / minute hands 3 and 4 is incorrect>
If the position of the hour / minute hands 3 and 4 is inaccurate, when the above-described step S22 → step S23 → step S24 → step S25 → step S22 is repeated, the second hand 2 may be rotated 60 steps, that is, one round. Since it is not determined that the light has been received in step S24, the process branches to step S41 (FIG. 11) in the branch process of step S25, and the process proceeds to a process of detecting the positions of the minute hand 3 and the hour hand 4.

  When branching to step S41, first, the CPU 35 moves the minute hand 3 to the even step position (step S41). Similarly to the second hand 2, the minute hand 3 also determines which of the two stationary positions of the rotor of the two-pole stepping motor is an even step and which is an odd step based on the polarity of the drive pulse. By supplying a pulse having a polarity corresponding to a step, the rotor 22c is brought into a stationary state of even steps.

  Next, the minute hand 3 is rotated two steps (2 °) (step S42), the light emitting element 31 is caused to emit light (step S43), and it is determined whether or not the light receiving element 32 has received the light from the light emitting element 31 (step S43). Step S44). As a result, if light cannot be received, it is determined whether or not it has been rotated by 720 steps (step S45). If it has not been rotated by 720 steps, the process returns to step S42, and step S42 → step S43 → step S44 → step. S45 → Step S42 is repeated until it is determined in step S44 that light has been received or it is determined in step S45 that the light has been rotated 720 steps.

  The reason for determining whether or not step 720 has been rotated in step S45 is that the hour hand wheel 27 is formed with a transmission hole 29 at a position overlapping the detection position P every hour at 0:00 to 10:00. Since the transmission hole 29 is not formed at a position overlapping with the detection position P at noon and is the fourth light shielding portion 29a, the light receiving element 32 receives two hours after receiving light through the transmission hole 29 corresponding to 10:00. By rotating the minute (360 × 2 steps) step, the next light reception cannot be performed until the transmission hole 29 corresponding to 0 o'clock overlaps the detection position P, that is, light reception cannot be performed for a maximum of 719 steps. Therefore, unless it is rotated 719 steps, it cannot be determined that the transmission holes 28 and 29 of the hour hand wheel 27 and the minute hand wheel 25 are overlapped at the detection position P during that time.

  On the other hand, when step S42 → step S43 → step S44 → step S45 → step S42 is repeated, if it is determined in step S45 that the rotation has been performed 720 steps, any light shielding portion of the second hand wheel 20 is at the detection position P. In this case, it can be determined that the transmission holes 28 and 29 of the hour hand wheel 27 and the minute hand wheel 25 cannot be detected. Therefore, in this case, the second hand wheel 20 is rotated by 30 steps (180 °). (Step S46), the transmission hole 21a or the long holes 21b and 21c of the second hand wheel 20 are overlapped with the detection position P. And step S47-> step S48-> step S49-> step S50-> step S47 which are the same processes as step S42-S45 are repeated.

  If it is detected in step S44 or step S48 that the light receiving element 32 has received light, a second hand zeroing process for moving the second hand 2 to the 00 second position is performed (step S51). This second hand zero return process includes the above-described steps S26, S27, S28, S29, S30, and S32.

  When the return of the second hand 2 is completed, the minute hand 3 is then rotated by 2 steps (2 °) (step S52), and the light emitting element 31 of the detector 13 is caused to emit light (step S53). It is determined whether or not light reception is detected (step S54). If light reception after 359 consecutive non-light receptions is not detected, it is determined whether or not 4320 steps, that is, whether the hour hand 4 has been driven for 12 hours (step S55), If not, the process returns to step S52.

  Here, the reason for detecting the light reception after 359 consecutive non-light receptions is that the hour hand wheel 27 is formed with a transmission hole 29 at a position overlapping the detection position P at every hour from 00 o'clock to 10 o'clock. Since the transmission hole 29 is not formed at the position overlapping the detection position P at the noon and there is the fourth light shielding portion 29a, the light receiving element 32 receives light through the transmission hole 29 corresponding to 10 o'clock and then receives two hours (360). In order to detect this, the number of steps of (× 2 steps) is rotated and no light is received until the transmission hole 29 corresponding to 0 o'clock overlaps the detection position P, which occurs only once during 12 hours of driving. is there. Since the detection is performed every two steps, the number of times of detection while the transmission hole 29 corresponding to 10:00 overlaps with the detection position P and receives light and the transmission hole 29 corresponding to 10:00 overlaps with the detection position P is received. Since this is the 360th time, light reception after 359 consecutive non-light receptions is detected.

  Step S52-> Step S53-> Step S54-> Step S55-> Step S52 is repeated. When light reception after 359 consecutive non-light receptions is detected, the current hour and minute hands 3, 4 positions are at 00:00, so The value in the minute hand position storage unit is reset to “0” (step S56). Then, the process proceeds to step S31, and when the second hand 2, the minute hand 3 and the hour hand 4 are timed by the time counting circuit 47 or when the shift time information 37a is set in the RAM 37, this shift is performed. Fast-forward to a time offset.

  On the other hand, when step S47 → step S48 → step S49 → step S50 → step S47 is repeated, if it is determined in step S49 that the rotation has been performed 720 steps, and step S52 → step S53 → step S54 → step S55 → When step S52 is repeated, if it is determined in step S55 that the hour / minute hands 3 and 4 have been driven for 12 hours (step 4320), an error occurs and the process proceeds to error processing.

  Even if it is detected that the needle positions of the hands 2 to 4 are inaccurate by the above-described needle correction processing, if the current time and shift time are set after confirming the accurate needle position, The hands 2 to 4 can be fast-forwarded to the desired time display until the current time is shifted by the shift time.

  As described above, according to the analog electronic timepiece 1 of this embodiment, when the shift time is set and the time shifted from the current time by the hands 2 to 4 is displayed on the dial 5, By the processing from step S11 to step S13 of the one-minute carry signal input processing (FIG. 9), the detection time at every hour shifts by the shift time, that is, the hands 2 to 4 shifted by the shift time are at the position at the hour. Since the needle position is detected when it comes, the needle position can be detected normally with the display state shifted by the shift time. In addition, because the time is displayed with the shift time shifted, it is determined that the positions of the hands 2 to 4 are in the wrong position by detecting the hand position, and the current time is returned. Is avoided.

  Further, it is determined by the one-minute carry signal input processing (FIG. 9) whether or not the shift time is set when the minute digit value is updated, and when it is set, the detection time of the hand position detection Since the shift time is shifted to determine whether or not the detection time is reached, it is possible to cope with the set shift time without significantly changing the processing contents of normal needle position detection.

  Further, when it is determined that the hands 2 to 4 are in the wrong position by the needle position detection and the hand correction process is performed, if the shift time is set, the hands 2 to 4 are moved to the positions where the current time is shifted by the shift time. In this case, the shift time setting function is not hindered.

  Further, the hand position detection is performed by irradiating light from the light emitting element 31 to the second hand wheel 20, the minute hand wheel 25, and the hour hand wheel 27 to determine the light receiving state of the light receiving element 32, so that the transmission hole as the detected portion is detected. Since it is the structure which detects whether it is located in P, a reliable needle position detection can be performed. In addition, since the shift time can be set to an arbitrary time by operating the switch unit 44 from the outside, it is possible to set the shift time according to the user's request. Further, the time counting circuit 47 is configured to count time data of the current time based on the time information acquired from the standard radio wave, and the set shift time information 37a does not affect the time counting circuit 47. Since the time display is performed separately and the time display is performed, for example, the current time information required for various processes such as the process of determining the time of radio wave reception is held in the time counting circuit 47 and the shift time is shifted. Time display can be performed.

  The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, in the above embodiment, a configuration in which the shift time can be set in units of minutes is illustrated, but it may be set in units of seconds, or may be set in units of 5 minutes or 10 minutes. In these cases, the timing for determining whether or not it is the time for detecting the hand position is not set every time the value of the minute digit is updated, but for example, if the shift time can be set in units of seconds, 1 This can be dealt with by determining whether it is time to detect the hand position every second, and if the shift time can be set in units of 5 minutes or 10 minutes, the needle position is detected every 5 minutes or 10 minutes. It may be configured to discriminate whether or not it is time.

  In the above embodiment, whether or not the shift time is set is determined based on whether or not the shift time information 37a is stored in the RAM 37. However, when a value of “0” is stored as the shift time information 37a. It may be determined that the shift time is not set.

  Moreover, in the said embodiment, since the time when the transmission hole overlaps with the detection position P is set to the hour, the time for detecting the needle position is set to the hour, but the position of the transmission hole and the detection position P are changed. Thus, the time for detecting the hand position can also be changed.

  In addition, the detailed structure and the detailed method shown in the embodiment can be appropriately changed without departing from the gist of the invention.

DESCRIPTION OF SYMBOLS 1 Analog electronic timepiece 2 Second hand 3 Minute hand 4 Hour hand 5 Dial 13 Detection part 20 Second hand wheel 21a 1st transmission hole 21b 2nd long hole 21c 2nd long hole 25 Minute hand wheel 27 Hour hand wheel 28 2nd transmission hole 29 3rd transmission hole 31 Light Emitting Element 32 Light Receiving Element 35 CPU
37 RAM
37a Shift time information 42 Detection circuit 44 Switch unit 47 Time counting circuit P Detection position

Claims (6)

First pointer display control means for displaying the current time with a pointer;
Needle position detecting means for detecting whether or not the pointer is at a predetermined detection position;
Needle position detection control means for operating the needle position detection means at a predetermined detection time;
Pointer position correcting means for correcting the position of the pointer when the needle position detecting means detects that the pointer is not at the detection position;
In an analog electronic watch with
Storage means for storing information on the deviation time;
Second pointer display control means for displaying, by the pointer, a time deviated from a current time by a deviation time stored in the storage means;
Detection time changing means for changing the detection time to a time shifted by a shift time stored in the storage means;
An analog electronic timepiece characterized by comprising: A time counting means for counting the current time,
The needle position detection control means includes
When the value of the minute digit of the time counting means is updated, it is determined whether or not the counting time of the time counting means is a specified time, and when it is determined that it is the specified time, the hand position detecting means Is configured to operate,
The detection time changing means determines whether or not the deviation time is stored in the storage means when the minute digit value of the time counting means is updated, and when the deviation time is stored, 2. The analog electronic timepiece according to claim 1, wherein the specified time is changed to a time in which the detection time is shifted by the shift time. The pointer position correcting means includes
2. The analog electronic timepiece according to claim 1, wherein the position of the hands is corrected to a position corresponding to a time at which a current time is shifted by the shift time. A gear having a part to be detected and rotating in conjunction with the pointer,
The needle position detecting means includes
It has a light emitting part and a light receiving part, and detects whether or not the detected part is in a predetermined position by irradiating light from the light emitting part to the gear to determine the light receiving state of the light receiving part, 2. The analog electronic timepiece according to claim 1, wherein the analog electronic timepiece is configured to determine whether or not the pointer is at a detection position based on the detection. An operation unit that allows external operation input,
A control unit configured to set information on a deviation time in the storage unit based on an operation input via the operation unit;
The analog electronic timepiece according to claim 1, further comprising: Time receiving means for receiving standard radio waves and obtaining time information of the current time;
Time counting means for counting the current time based on the time information acquired by the time receiving means;
With
The first pointer display control means includes
The current time is displayed with a pointer based on the counting time of the time counting means,
The second pointer display control means includes
2. The analog electronic timepiece according to claim 1, wherein the time difference is displayed by the hands based on a counting time of the time counting means and a time difference stored in the storage means.

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