JP5708019B2 - Electronic clock with orientation display function - Google Patents

Description

  The present invention relates to an electronic timepiece with an orientation display function that indicates a predetermined direction with a pointer.

  An electronic timepiece having an electronic compass function for displaying a direction with hands has been developed.

  In addition, as a related art related to the present invention, Patent Document 1 discloses a configuration in which two hands are arranged in a straight line in the compass mode and point in the north direction.

  In a multi-function electronic timepiece that displays various information using the pointer, a pointer position counter is provided inside, and the count value of the pointer position counter is updated each time the stepping motor is driven to rotate the pointer. It is common to count positions.

  Also, in electronic watches, when a large magnetic force or impact is applied from the outside, the pointer rotates even when the stepping motor is not driven, or the pointer rotates even though a drive signal is output to the stepping motor. Otherwise, the count value of the pointer position counter may not match the actual pointer position.

  Therefore, conventionally, a transmission hole is provided in a gear that transmits movement to the pointer, and the transmission hole is assembled so that the transmission hole appears at a detection position at a predetermined time (for example, the minute hand is 55 minutes per hour, the hour hand is 11:55, etc.) An electronic timepiece having a pointer position detection mechanism that detects the presence or absence of a position shift of the pointer by detecting the transmission hole of the gear at the detection position at the predetermined time has been developed (see, for example, Patent Document 2). .

JP 2008-157854 A JP 2009-085674 A

  If the position of the pointer is shifted during the operation of the electronic compass, the correct direction cannot be indicated by the pointer. Therefore, before starting the operation of the electronic compass, it is preferable to check whether there is any misalignment of the pointer.

  However, when switching to the electronic compass mode, if the electronic compass operation is started after the hand position detection process performed in the time display mode is performed in the same manner, the movement of the pointer is unnatural as follows. The problem of giving a mysterious impression to a user arises. For example, when the user switches to the electronic compass mode, first, after it is confirmed that the hour hand and the minute hand move to a position at a predetermined time for position detection (for example, 11:55) and there is no displacement, The hour hand and the minute hand move to the position for the electronic compass, and then the operation of pointing the north direction with the pointer is started. In such a process, the pointer once moves to a position at a predetermined time (for example, 11:55) unrelated to the display of the azimuth, which gives a mysterious impression to the user.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an electronic timepiece with an orientation display function capable of confirming whether or not a position shift has occurred in a pointer without giving a mysterious impression to the user when pointing the pointer in a predetermined direction. There is.

In order to achieve the above object, the present invention
A first guideline and a second guideline;
Azimuth detecting means for obtaining azimuth data;
Mode switching means for switching between a time display mode for displaying time by the first and second hands and an azimuth display mode for displaying azimuth, and pointer position data storage for storing position data of the first and second hands Means,
A hand movement processing means for moving the first and second hands and executing a hand movement process for updating the position data;
Predetermined position movement control means for controlling the hand movement processing means so as to move to a predetermined position where the first and second pointers are linear based on the position data;
Determining means for determining whether or not the first and second hands are detected at the predetermined position ;
Based on the azimuth data obtained by the azimuth detection means and the position data of the pointer position data storage means, the first and second hands that are in a linear arrangement relationship have a predetermined direction based on the azimuth data. Bearing display control means for controlling the hand movement processing means to point,
Bei to give a,
When the mode switching means switches to the azimuth display mode, control of the hand movement processing means by the predetermined position movement control means and judgment by the judgment means are sequentially executed, and the judgment means performs the first operation. And an electronic timepiece with a direction display function , wherein control of the hand movement processing means by the direction display control means is started when it is determined that the second hand is at the predetermined position. did.

According to the present invention, more in position movement control hand stage, the first and second hands is checked or not occur misalignment is moved to a predetermined position where the straight line, and by the orientation display control means, The predetermined direction is indicated by an arrangement relationship in which the first and second hands are linear . Therefore, the arrangement of the first and second pointers when confirming whether or not the pointer is misaligned and the arrangement of the first and second pointers when displaying the orientation are related to each other. Without giving a mysterious impression to the user, it is possible to confirm whether or not the pointer is misaligned when displaying the direction.

1 is a block diagram illustrating an overall configuration of an electronic timepiece according to an embodiment of the present invention. It is a figure explaining movement of a pointer when changing from time display mode to direction measurement mode. It is a flowchart which shows the control procedure of the key input process performed by CPU. It is sectional drawing which shows the gear part vicinity of a pointer | guide in the wheel train mechanism. It is a front view which shows the second hand wheel to which the second hand is fixed. It is a figure explaining the pattern of the penetration hole provided in the second hand wheel. It is a figure which shows the gear train which transmits rotational motion to a second hand. It is a figure which shows the gear train which transmits rotational motion to a minute hand. It is a figure which shows the gear train which transmits rotational motion to an hour hand. It is a flowchart which shows the process sequence of the hourly test | inspection of a pointer position and the complete correction | amendment of a pointer position. It is a flowchart which shows the detailed procedure of the hour / second hand test | inspection process of step S1 of FIG. It is a flowchart which shows the detailed procedure of the second hand detection process of step S3 of FIG. 10, and S5. It is a flowchart which shows the detailed procedure of the minute hand detection process of step S4 of FIG. It is a flowchart which shows the detailed procedure of the hour hand detection process of FIG.10 S7.

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

  FIG. 1 is a block diagram showing an overall configuration of an electronic timepiece 1 with a direction display function according to an embodiment of the present invention.

  The electronic timepiece 1 of this embodiment is a wristwatch that can be switched between time display and direction display by using a second hand 2, a minute hand 3, and an hour hand 4 (hereinafter also referred to as hands 2 to 4; see FIGS. 2 and 4). It is. As shown in FIG. 1, the electronic timepiece 1 includes a CPU (central processing unit) 10 that performs overall control, an analog movement 30 that can independently drive the hands 2 to 4, a second hand 2, and a minute hand. 3, a second detector 32 that detects the position of the hour hand 4, a magnetic sensor 33 that detects the magnetic strength in two directions, and an output of the magnetic sensor 33 A direction detection unit 34 that generates a signal indicating a direction, a ROM 36 that stores a control program and control data executed by the CPU 10, a RAM 37 that provides a working memory space for the CPU 10, and an oscillation that generates a timing signal having a constant frequency. A circuit 38 and a frequency dividing circuit 39; a power supply unit 40 for supplying an operating voltage to each unit; an antenna 41 and a detection circuit 42 for receiving a standard radio wave including a time code; An illumination unit 43 and the illumination drive circuit 44 illuminates the plate, a speaker 45 and a buzzer circuit 46 for outputting an alarm sound, and a user-operable switch unit 47 or the like from the outside.

  The analog movement 30 independently transmits the motor 51 for driving the second hand 2, the motor 52 for driving the minute hand 3, the motor 53 for driving the hour hand 4, and the rotational movements of the motors 51 to 53 to the hands 2 to 4, respectively. And a gear train mechanism 20 having a plurality of gear trains. Motors 51 to 53 are two-pole stepping motors. In each of the train wheel mechanisms 20, when the motor 51 rotates 60 steps, the second hand 2 rotates once, the motor 52 rotates 360 steps, the minute hand 3 rotates one time, and the motor 53 rotates 360 steps. The hour hand 4 is configured to make a round.

  The first detection unit 31 and the second detection unit 32 are light emitting units 311 and 321 that irradiate light from one side with a gear of the train wheel mechanism sandwiched between predetermined detection positions P and P2 (see FIGS. 4 and 9). (For example, a light emitting diode) and optical sensors 312, 322 (for example, phototransistors) that receive light on the other side. It is possible to determine whether or not the transmission hole of the gear is overlapped at the detection positions P and P2 by the light emitting operation of the light emitting units 311 and 321 and the light receiving operation of the optical sensors 312 and 322. Yes.

  The magnetic sensor 33 is configured to detect the magnetic strength in two directions using, for example, a magnetoresistive element. The azimuth detecting unit 34 receives the sensor outputs of the magnetic sensor 33 while sequentially applying the bias magnetic fields in the four directions to the magnetic sensor 33, converts the sensor outputs into data, and performs a predetermined calculation to obtain the magnetic north direction ( Direction data representing a direction on the dial corresponding to magnetic north is generated and supplied to the CPU 10.

  The RAM 37 counts the timing signal of the frequency dividing circuit 39 to indicate a current time, a second hand position data storage unit 37a for storing the hand positions of the second hand 2, the minute hand 3, and the hour hand 4, and a minute hand position data storage unit. 37b, an hour hand position data storage unit 37c is provided. The count values of the position data storage units 37a to 37c represent the number of steps in which the positions of the hands 2 to 4 are moved from the reference position (0 hour 0 minute 0 second position), and the CPU 10 controls the driving of the motors 51 to 53. The CPU 10 updates the count value every time. That is, the CPU 10 that performs this process constitutes a hand movement processing means. For example, each time one-step drive control is performed, the count values in the corresponding position data storage units 37a to 37c are updated by one step.

  In the ROM 36, a program for time display processing for displaying the time by driving the hands 2 to 4 in synchronization with the time counter, and a program for radio wave reception processing for receiving the standard radio wave under a predetermined condition and correcting the value of the time counter An hourly inspection process program for operating the first detection unit 31 and the second detection unit 32 at a predetermined detection time to confirm whether or not the pointers 2 to 4 are misaligned. In this case, a program for a complete correction process for canceling the positional deviation and a program for a key input process for shifting to the azimuth measurement mode or returning to the time display mode according to the key input are stored.

  Next, the operation when switching to the azimuth measurement mode will be described.

  FIG. 2 is a diagram illustrating the movement of the pointer when the time display mode is switched to the azimuth measurement mode. FIG. 2A shows a time display before mode switching, FIG. 2B shows a state immediately after mode switching, and FIG. 2C shows a state during orientation display after mode switching.

  In the electronic timepiece 1 of this embodiment, for example, when the user operates the switch unit 47 to switch from the time display mode to the direction measurement mode, first, as shown in FIGS. -4 are fast-forwarded and moved to a predetermined position (for example, a position at 6:00:00). Here, the predetermined position is a position where at least the minute hand 3 and the hour hand 4 are in a straight line with their directions different from each other by 180 °.

  In this embodiment, although a detailed structure will be described later, it is possible to determine whether or not the second hand 2 and the minute hand 3 are in the predetermined position by the detection operation of the first detection unit 31, and the second detection It is possible to determine whether or not the hour hand 4 is at the predetermined position by the detection operation of the portion 32.

  Therefore, when the mode is switched to the azimuth measurement mode and the hands 2 to 4 move to the predetermined positions in FIG. 2B, the positions of the hands 2 to 4 are detected by operating the first detector 31 and the second detector 32. Execute. Here, if there is no position shift in the hands 2 to 4, it is determined that there is no position shift by position detection.

  If it is determined that the minute hand 3 and the hour hand 4 are not misaligned, a process of pointing to magnetic north by the minute hand 3 and the hour hand 4 is started as shown in FIG. That is, the direction of magnetic north is measured by the magnetic sensor 33 and the azimuth detector 34, and the minute hand 3 and hour hand 4 are fast-forwarded together while maintaining a straight line arrangement relationship, so that the minute hand 3 is directed toward magnetic north (in the figure). “N”) and the hour hand 4 is moved to a position indicating the direction of 180 ° from the magnetic north. Such azimuth measurement and hand movement processing are repeatedly performed, for example, every predetermined time (every second), and magnetic north is continuously displayed by the hands 3 and 4.

  As described above, since the arrangement relationship between the pointers 3 and 4 in which the presence / absence of the positional deviation is confirmed and the arrangement relationship between the pointers 3 and 4 that indicate and display the azimuth are both in the same kind of arrangement relationship as a straight line, It is possible to continuously perform confirmation that there is no positional shift and display of the azimuth without giving an inexplicable impression.

  When the minute hand 3 or the hour hand 4 is misaligned when switching to the azimuth measurement mode, the CPU 10 counts the position data storage units 37a to 37c by the CPU 10 during the fast-forward drive period of FIG. 2 (a) → (b). The hands 2 to 4 are driven and controlled until the numerical value reaches a value corresponding to a predetermined position (6:00:00). However, the reached position of the minute hand 3 or hour hand 4 after fast-forward driving is a predetermined position (6:00 Min 00 seconds). Therefore, when the first detection unit 31 and the second detection unit 32 operate to confirm the presence or absence of a positional shift, it is detected that a positional shift has occurred.

  In the electronic timepiece 1 of this embodiment, when it is detected that a position shift has occurred, the actual position of the hands 2 to 4 matches the count value of the position data storage units 37a to 37b by a complete correction process described later. The process of correcting is performed. When the complete correction process is executed, a display indicating that the pointers 2 to 4 are misaligned (for example, lighting of an indicator lamp on the dial, display with liquid crystal, or the second hand 2 on the dial) Display indicating the needle position NG mark, etc.) to notify the user that the positional deviation of the hands 2 to 4 is being corrected. When the complete correction process is completed, the process proceeds to the above-described azimuth measurement mode process.

  FIG. 3 shows a flowchart of key input processing executed by the CPU 10.

  The operation at the time of mode switching described above is realized by the key input process of FIG. When the switch unit 47 is operated and the key input process is started, first, the CPU 10 determines whether or not the direction measurement key of the switch unit 47 is turned on (step J1: mode switching means). As a result, if it is this on operation, the process proceeds to the following process, but if it is another operation, this key input process is terminated.

  When it is determined that the direction measurement key is turned on and the process proceeds to the next, the CPU 10 fast-forwards the hands 2 to 4 to a predetermined position (position of 6:00:00) (step J2: predetermined position movement control means). ). Here, the CPU 10 recognizes the positions of the hands 2 to 4 based on the count values of the position data storage units 37a to 37c.

  After fast-forwarding to the predetermined position, the CPU 10 then activates the first detection unit 31 (step J3) and determines whether or not a predetermined amount of light is detected by the optical sensor 312 (step J4: determination means). Here, if it is determined that light is detected, the second detection unit 32 is further operated (step J5), and it is determined whether or not a predetermined amount of light is detected by the optical sensor 322 (step J6: determination means). Although details will be described later, if it is determined that light is detected in Step J4, it can be determined that the minute hand 3 is at a predetermined position (00:00), and if it is determined that light is detected in Step J6, the hour hand 4 is determined. It can be determined that it is at the position (position at 6:00).

  Therefore, if it is determined in steps J4 and J6 that the light is detected, the process proceeds to processing in the direction measurement mode from step J9. On the other hand, if it is determined that light is not detected in any of Steps J4 and J6, it is determined that the pointers 2 to 4 are misaligned, and first, a display for informing the user that the misalignment has occurred. Is performed (step J7), and complete correction processing of a pointer position, which will be described later, is executed (step J8: correction means). Then, the process proceeds to the processing in the direction measurement mode from step J9.

  After shifting to the processing of the azimuth measurement mode, the CPU 10 operates the magnetic sensor 33 and the azimuth detection unit 34 to execute the azimuth measurement (step J9), and drives the minute hand 3 and the hour hand 4 to fast-forward according to the measurement result. However, the direction of magnetic north is instructed to the minute hand 3 while maintaining the straight line arrangement relationship (step J10: bearing display control means). Here, the CPU 10 recognizes the positions of the hands 2 to 4 based on the count values of the position data storage units 37a to 37c. Then, it is determined whether or not the release key of the switch unit 47 has been operated (step J11), and the processes of steps J9 and J10 are repeatedly executed, for example, at predetermined time intervals (such as 1 second intervals) until the operation is performed. During this time, if there is an operation of the release key, it is determined in step J11, and this key input process is terminated.

[Pointer position detection mechanism]
Next, the structures of the analog movement 30, the first detection unit 31, and the second detection unit 32 that enable the position detection of the hands 2 to 4 will be described in detail.

  FIG. 4 is a cross-sectional view showing a gear portion close to the hands 2 to 4 in the gear train mechanism 20 of the analog movement 30.

  As shown in FIG. 4, in the train wheel mechanism 20 of this embodiment, the second hand wheel 24 to which the second hand 2 is fixed via the second hand shaft 24a and the minute hand wheel 25 to which the minute hand 3 is fixed via the minute hand shaft 25a. The hour hand wheel 27 to which the hour hand 4 is fixed via the hour hand shaft 27a and the intermediate wheel 26 that rotates in conjunction with the minute hand wheel 25 are included. The second hand wheel 24, the minute hand wheel 25, and the hour hand wheel 27 rotate independently of each other about the same rotation shaft by driving of the motors 51 to 53, respectively.

  As shown in FIG. 4, the light-emitting unit 311 and the optical sensor 312 of the first detection unit 31 have a detection position P set in advance with the second hand wheel 24, the minute hand wheel 25, the intermediate wheel 26, and the hour hand wheel 27 interposed therebetween. Thus, they are fixed to the frame portion of the housing of the electronic timepiece 1 so as to face each other.

  FIG. 5 is a front view showing the second hand wheel 24 to which the second hand 2 is fixed, and FIG. 6 is a view for explaining patterns of the transmission holes 24h1 to 24h7 provided in the second hand wheel 24.

  In the second hand wheel 24, a plurality of transmission holes 24h1 to 24h7 are formed at radial positions overlapping the detection position P. These transmission holes 24h1 to 24h7 are sections of 10 steps in a continuous manner starting from one of the step positions with the angle division of 2 steps (2 gear teeth) as one unit. The patterns of presence / absence of transmission holes (shown in the bracket symbol below) are formed so as to be all different patterns by changing the starting points. Furthermore, the step hole is formed so that a transmission hole is present at a step position 180 ° opposite to the step position without the transmission hole.

  In the electronic timepiece 1 of this embodiment, although not particularly limited, the pattern of presence / absence of transmission holes in the section K1 (the section from 00 seconds to 08 seconds) is included in the pointer position inspection process executed every hour. Detection is made to determine whether the second hand 2 is misaligned. Further, in the process of correcting the positional deviation after the positional deviation is detected in the hands 2 to 4, the pattern of the presence or absence of the transmission hole in the section K2 (the section from 52 seconds to 00 seconds) is detected, and the second hand 2 Designed to confirm position.

  7 to 9 are front views showing a train wheel mechanism 20 that rotates the second hand 2, the minute hand 3, and the hour hand 4, respectively. In these figures, the teeth on which the gears are formed are omitted.

  As shown in FIG. 7, the second hand wheel 24 is connected to the rotor 51a of the motor 51 with the fifth wheel & pinion 211 interposed therebetween, and is rotated by 6 ° for each rotation of the rotor 51a in one step (180 °). It has become.

  As shown in FIG. 8, the minute hand wheel 25 is connected to the rotor 52 a of the motor 52 through the intermediate wheel 26 and the second wheel 212. The minute hand wheel 25, the intermediate wheel 26 and the second wheel & pinion 212 constitute a first wheel train mechanism. Each time the rotor 52a rotates by one step (180 °), the intermediate wheel 26 rotates by 30 ° and the minute hand wheel 25 rotates by 1 °.

  In the minute hand wheel 25, one transmission hole 25h is formed at a radial position overlapping the detection position P. The intermediate wheel 26 also has one transmission hole 26h at a radial position that overlaps the detection position P. The transmission hole 25h of the minute hand wheel 25 and the transmission hole 26h of the intermediate wheel 26 are assembled so as to overlap each other at a detection position P in a predetermined step (step in FIG. 8) of the minute hand wheel 25. In the steps before and after this step, the intermediate wheel 26 is rotated by 30 ° so that the transmission hole 26h is largely disengaged from the detection position P, so that the transmission holes do not overlap at the detection position P.

  The minute hand 3 is assembled at a step position where the transmission holes 25h and 26h of the minute hand wheel 25 and the intermediate wheel 26 overlap at the detection position P so as to indicate a predetermined position (00 minute position) on the dial.

  As shown in FIG. 9, the hour hand wheel 27 is connected to the rotor 53a of the motor 53 through three intermediate wheels 213, 215, 216 and a third wheel & pinion 214, and is one step (180 °) of the rotor 53a. Each rotation is rotated by 1 °.

  As shown in FIG. 4, the hour hand wheel 27 is configured to rotate around the same rotation axis as the second hand wheel 24 and the minute hand wheel 25, at a radial position overlapping the detection position P, and in the circumferential direction. Twelve transmission holes 27h arranged at equal intervals are formed. By assembling the hour hand 4 and the hour hand wheel 27 in an appropriate positional relationship, one of the transmission holes 27h overlaps the detection position P when the hour hand 4 points to a predetermined position (00 hour position) on the dial. To be done.

  A detection wheel 217 for detecting the position of the hour hand 4 is connected to the train wheel mechanism of the hour hand 4. The intermediate wheel 213, 215, 216, the third wheel 214 and the detection wheel 217 constitute a second wheel train mechanism. The detection wheel 217, the intermediate wheel 213, and the third wheel 214 are provided with transmission holes 217h, 213h, and 214h, respectively. These transmission holes 217h, 213h, and 214h are set so as to overlap at the second detection position P2 when the hour hand 4 is moved to a predetermined position (positions of 6:00 and 18:00). In the steps before and after this step, the intermediate wheel 213 rotates greatly so that the transmission hole 213h deviates greatly from the detection position P2, so that the transmission holes do not overlap at the second detection position P2. .

  The light emitting unit 321 and the optical sensor 322 of the second detection unit 32 are in a state of facing each other at the second detection position P2 with the detection wheel 217, the intermediate wheel 213, and the third wheel 214 interposed therebetween. The electronic timepiece 1 is fixed to the frame portion of the housing.

  With the configuration of the analog movement 30, the first detection unit 31, and the second detection unit 32 as described above, the transmission hole 24h1 at the detection position P when the hands 2 to 4 are at a predetermined position (6:00:00). , 25h and 26h overlap each other, and the transmission holes 213h, 214h and 217h overlap at the second detection position P2, and these can be identified by the operations of the first detection unit 31 and the second detection unit 32.

[Pointer position inspection process / complete correction process]
Next, the pointer position inspection process and the complete correction process will be described in detail.

  FIG. 10 is a flowchart showing the control procedure of the pointer position inspection process and the complete correction process.

  The process of FIG. 10 is started from step S1 when the time measurement time becomes the inspection time of the second hand 2 and the minute hand 3 (hours 00:00). In addition, when the timekeeping time comes to the inspection time of the hour hand 4 (6:00, 18:00), the process starts from step S7. Further, the process proceeds to the complete correction process in step S8 of the key input process of FIG. 3, or starts from step S6 when the user performs a complete correction key operation.

  Among the steps of the process of FIG. 10, the hourly second hand inspection process of step S <b> 1 is a process of confirming whether the second hand 2 and the minute hand 3 are misaligned while performing normal hand movement for displaying time. The second hand detection process in steps S3 and S5 is a process for correcting the positional deviation by detecting the position of the second hand 2 in a situation where the position of the second hand 2 is unknown. The minute hand detection process in step S4 is a process of correcting the positional deviation by detecting the position of the minute hand 3 in a situation where the position of the minute hand 3 is unknown. The hour hand detection process in step S7 is a process of checking whether the hour hand 4 has been displaced and detecting the position of the hour hand 4 when there is a position deviation to correct the position deviation.

  In this hand position detection and correction process, a complete correction flag indicating whether or not the complete correction process is being executed is set in a predetermined area of the RAM 37, and conditional branching is appropriately performed based on this value.

  The processing flow is as follows depending on the state of the pointers 2 to 4. First, when the second hand 2 and the minute hand 3 are not misaligned and the inspection time is 00 minutes per hour, the misalignment is inspected while performing normal hand movement in the hourly second hand inspection (step S1), and there is no misalignment. According to the determination, the inspection is normally completed.

  When only the second hand 2 is misaligned and the inspection time is 00 minutes per hour, it is determined that there is a position misalignment in the hourly second hand inspection (step S1). In this case, first, the CPU 10 turns off the complete correction flag to distinguish it from the complete correction process (step S2), and performs the second hand detection process (step S3). If only the second hand 2 is misaligned, the position of the second hand 2 can be detected and corrected here, and the correction is normally completed as it is.

  When the minute hand 3 or the minute hand 3 and the second hand 2 are misaligned and the inspection time is 00 minutes per hour, the detection position P is blocked by the minute hand wheel 25 or the intermediate wheel 26. It becomes “NG” in the inspection (step S1). In this case, after setting the complete correction flag (step S2), the CPU 10 performs the first second hand detection process (step S3), and the result is “NG”. Therefore, after the minute hand detection process (step S4) is performed to detect the position of the minute hand 3 and the positional deviation is corrected, the second second hand detection process (step S5) is performed to complete the correction. If the second hand detection process (step S5) results in failure (NG), it is assumed that some error has occurred and the process ends in error (second hand detection error).

  If the hour hand 4 has a specific positional deviation (for example, a positional deviation in which all the 12 transmission holes 27h of the hour hand wheel 27 are out of the detection position P), the inspection time is 00 minutes per hour. Since the hour hand wheel 27 closes the detection position P and the position of the second hand 2 and the minute hand 3 cannot be detected, after proceeding to steps S1, S2, and S3, the minute hand detection process (step S4) also results in a failure (NG). Therefore, the CPU 10 subsequently checks whether the detection process of the hour hand 4 has been completed by the complete correction flag (step S9), and then turns on the complete correction flag to perform the complete correction process (step S6), and step S7. Proceed to In the hour hand detection process (step S7), the position of the hour hand 4 is detected and the displacement is corrected. As a result, the specific positional deviation of the hour hand 4 is corrected. Thereafter, necessary processing is performed in one or two second hand detection processes (steps S3 and S5) and a minute hand detection process (step S4), so that the second hand 2 and the minute hand 3 are also corrected if they are misaligned. Correction is complete.

  When the inspection time is 6:00 or 18:00, the CPU 10 performs an hour hand detection process (step S7), and corrects the position detection and the position shift of the hour hand 4, respectively. Then, the process proceeds to “OFF” in the discrimination process in step S8, and the hour hand inspection is completed. The hour hand 4 can independently detect and correct the hand position regardless of the position of the other hands 2 and 3, so if the hour hand detection process (step S7) results in a failure (NG), The error ends (hour hand detection error) as an error has occurred.

  When the complete correction processing of the pointer position is started, first, the CPU 10 turns on the complete correction flag to distinguish the complete correction processing (step S6). Subsequently, an hour hand detection process (step S7) is performed to detect and correct the hand position of the hour hand 4. Next, a necessary process is performed among the first and second second hand detection processes (steps S3 and S5) and the minute hand detection process (step S4), and any misalignment between the second hand 2 and the minute hand 3 is corrected. . Then, correction is completed.

  Further, if the result of step S7, S4, S5 results in a failure (NG), it is determined that an error has occurred and the process ends with an error.

  Next, the process of each step in FIG. 10 will be described.

  FIG. 11 shows a detailed flowchart of the hourly second hand inspection process in step S1 of FIG.

After the transition to hourly seconds hand examination processing, CPU 10 while performing a hand operation of a normal second hand 2 (step S12), 10 over a hand driving period (step S11, S18, loop period by S19), for each movement pulse for even a few seconds (Step S13), it is determined whether or not light is detected by operating the first detection unit 31 (whether the transmission holes are overlapped at the detection position P) (Step S14). Cause the detection operation for each movement pulse for even a few seconds, the motor 51 to 53 is a two-pole stepping motor, only position deviation of even-numbered steps occur even if the position deviation occurs, the positional deviation of the odd step occurs It is because it is not obtained.

  With five detections every two steps, the CPU 10 compares the detection pattern (Xi; i = 0 to 4) with the detection pattern (Yi; i = 0 to 4) when there is no positional deviation. (Steps S15 to S18), if all coincide with each other, the process ends with no misalignment. If there is any inconsistency, all the pointers 2 to 4 are stopped to correct the misalignment. (Step S20), the process ends with the result of the positional deviation.

  Through the series of processes described above, it is possible to confirm whether or not the second hand 2 and the minute hand 3 are misaligned while performing normal hand movement for displaying time.

  FIG. 12 shows a detailed flowchart of the second hand detection process in steps S3 and S5 of FIG.

After the transition to the second hand detection processing, CPU 10, while the second hand 2 by fast-forward over (step S32), 68 (= 34 × 2) hand driving period (step S31, S37, S39, loop period by S40), even Every few seconds (step S3 3 ), the first detection unit 31 is operated to determine whether or not light is detected (the transmission hole is overlapped at the detection position P) (step S34). The determination result is stored in the variable Xi (steps S35 and S36).

  When five or more detection patterns can be acquired (step S37), each time a detection operation is performed thereafter, the immediately preceding five detection patterns “XJ; J = (i−4) to i” are 52 seconds to 00. It is determined whether or not it matches the detection pattern “0, 1, 1, 0, 1” of the transmission hole at the second position (step S38). If the result of the determination is that they match, it can be determined that the second hand 2 is at the 00 second position, so the value of “00” is overwritten in the second hand position data storage unit 37a (step S41), and the position correction of the second hand 2 is normally completed. .

  On the other hand, if they do not match in step S38, it is determined whether the movement of 68 steps has been completed (i = 34) (step S39), and if not, loop processing is continued. If it is determined in step S39 that the operation has been completed, the detection pattern “0, 1, 1, 0, 1” at the 52-00 second position will not be detected even if the second hand 2 is rotated once in 8 revolutions. Since it can be determined that the position cannot be corrected, the process ends with a failure (NG) result.

  By the above series of processing, when there is no position shift of the minute hand 3 or a specific position shift of the hour hand 4, the position of the second hand 2 is detected and the position shift of the second hand 2 is corrected in a situation where the position of the second hand 2 is unknown. Can do.

  FIG. 13 shows a detailed flowchart of the minute hand detection process in step S4 of FIG.

  When the process proceeds to the minute hand detection process, the CPU 10 first determines whether or not light has been detected by operating the first detection unit 31 in order to confirm whether or not the minute hand 3 is at the 00 second position (step S51). As a result, if light is detected, the value "00" is overwritten in the minute hand position data storage unit 37b (step S61), and this minute hand detection process is normally terminated.

  On the other hand, if it is not detected in step S51, every time the minute hand 3 is moved one step (step S52), the first detection unit 31 is operated to detect light for a period during which the minute hand 3 makes a round (step S54). It is determined whether it has been performed (step S53). If light is detected during this period, it can be determined that the minute hand 3 is at the 00:00 position, so the value "00" is overwritten in the minute hand position data storage unit 37b (step S61), and this minute hand The detection process ends normally.

  If the light is not detected throughout the period in which the minute hand 3 makes a round, it can be determined that there is a high possibility that the second hand wheel 24 is blocking the detection position P. Therefore, the second hand wheel 24 is rotated halfway (step S55). Any one of the transmission holes 24h1 to 24h7 is set to the detection position P. Thereafter, similarly to the above, if necessary, the minute hand 3 is rotated once to detect whether the minute hand 3 is at the 00:00 position (steps S56 to S59).

  If light is detected during this period, the value of “00” is overwritten in the minute hand position data storage unit 37b (step S61), and this minute hand detection process ends normally. On the other hand, if no light is detected during this period, the process proceeds to “YES” in the determination process in step S59, and the minute hand detection process is terminated as a result of the failure (NG).

  Through the above-described series of processing, when there is no specific positional deviation of the hour hand 4, the position deviation can be corrected by detecting the position of the minute hand 3 in a situation where the position of the minute hand 3 is unknown.

  FIG. 14 shows a detailed flowchart of the hour hand detection process in step S7 of FIG.

  When shifting to the hour hand detection process, the CPU 10 first determines whether or not light is detected by operating the second detection unit 32 in order to confirm whether the hour hand 4 is at the position of 6:00 or 18:00. (Step S71). As a result, if light is detected, the value "180" is overwritten in the hour hand position data storage unit 37c (step S75), and this hour hand detection process is normally terminated.

  On the other hand, if it is not detected in step S71, every time the hour hand 4 is moved one step (step S72), the second detection unit 32 is operated to detect light for a period during which the hour hand 4 makes one round (step S74). It is determined whether it has been performed (step S73). If light is detected during this period, it can be determined that the hour hand 4 is at the 6:00 or 18:00 position, so the hour hand position data storage unit 37c is overwritten with the value "180" (step S75), the hour hand detection process is normally terminated.

  If no light is detected throughout the period of making the hour hand 4 make a round, the process proceeds to “YES” in the determination process in step S74, and the hour hand detection process is terminated as a result of the failure (NG).

  Through the above-described series of processing, it can be confirmed whether or not the hour hand 4 is misaligned, and when there is a position misalignment, the position of the hour hand 4 can be detected and the position misalignment can be corrected.

  As described above, according to the electronic timepiece 1 of this embodiment, the minute hand 3 and the hour hand 4 rotate while maintaining a linear arrangement in the azimuth measurement mode to indicate the direction of magnetic north, The position of the minute hand 3 and the hour hand 4 can be detected at a predetermined position where the hour hand 4 is in a straight line (position indicating 6:00:00). Accordingly, the positional relationship between the minute hand 3 and the hour hand 4 when displaying the direction and the positional relationship between the minute hand 3 and the hour hand 4 when confirming whether the minute hand 3 and the hour hand 4 are misaligned are related to each other. Therefore, even if the processing in the azimuth measurement mode and the processing for detecting the positions of the minute hand 3 and the hour hand 4 are continuously performed, the user does not give an inexplicable impression. That is, without giving a mysterious impression to the user, it can be confirmed that there is no positional deviation between the minute hand 3 and the hour hand 4, and an accurate azimuth can be indicated by the minute hand 3 and the hour hand 4 having no positional deviation.

  In the electronic timepiece 1 of this embodiment, immediately after switching to the azimuth measurement mode, the minute hand 3 and the hour hand 4 are moved to a predetermined position (6:00 hour 00 second position) in a straight line to detect the position of the pointer. If it is normal, the minute hand 3 and the hour hand 4 are directly shifted to processing in the direction measuring mode in which a predetermined direction is indicated in a linear arrangement relationship. Therefore, without giving a mysterious impression to the user, it can be confirmed that there is no positional deviation at the start of the azimuth measurement mode, and an accurate azimuth can be indicated from the beginning of the azimuth measurement mode.

  In the electronic timepiece 1 of this embodiment, immediately after switching to the azimuth measurement mode, the minute hand 3 and the hour hand 4 are moved to a predetermined position (6:00 hour 00 second position) in a straight line to detect the position of the pointer. If it is determined that there is a positional shift, the position of the minute hand 3 and the hour hand 4 is corrected by the complete correction process, and then the process proceeds to the direction measurement mode process. Therefore, even when a positional deviation has occurred, it can be corrected and an accurate azimuth can be indicated by the minute hand 3 and the hour hand 4 having no positional deviation.

  Further, in the electronic timepiece 1 of this embodiment, as a configuration for detecting the position of the minute hand 3 and the hour hand 4, whether or not the minute hand 3 and the hour hand 4 are at a specific position (a position where the transmission holes overlap at the detection positions P and P2). The specific position includes a predetermined position (6:00 hour 00 second position) where the minute hand 3 and hour hand 4 are in a straight line. Accordingly, it is possible to check the presence or absence of a positional shift required for the azimuth display by using a detection mechanism for inspecting the pointer position at a predetermined time in the time display mode.

  Further, in the electronic timepiece 1 of this embodiment, the arrangement relationship of the straight lines when the position detection and the azimuth display of the minute hand 3 and the hour hand 4 are performed is such that the minute hand 3 and the hour hand 4 rotating around the same axis are mutually connected. They are arranged in different directions by 180 °. Therefore, the direction display is also easy to see.

  In addition, since the configuration for detecting the position is a configuration for detecting whether or not the transmission holes of the gear overlap at the detection positions P and P2, it is possible to reliably and easily provide the necessary pointers 2 to 4 without using a complicated mechanism. Position detection 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, the time position where the position check of the pointer in the time display mode is performed and the time position where the processing for checking whether there is a position shift in the direction measurement mode are both the same time position. However, these time positions can be made different by increasing the transmission holes of the gears.

  In the above-described embodiment, processing for confirming whether or not the minute hand 3 and the hour hand 4 are misaligned at the time of switching the azimuth measurement mode is performed. It is also possible to confirm that there is no misalignment by moving to. Further, when the minute hand 3 and the hour hand 4 come to a predetermined position while the azimuth is displayed, it may be confirmed whether or not there is a positional deviation. Further, as the processing content of the azimuth display, in addition to continuously repeating the measurement and display of the azimuth, the content of measuring and displaying the azimuth only once may be employed.

  Moreover, although the example which employ | adopted the minute hand 3 and the hour hand 4 as the 1st pointer | guide and 2nd pointer | guide which display a direction was shown in the said embodiment, you may make it apply another pointer | guide. Further, the configuration for detecting the position of the pointer is not limited to the configuration for detecting the transmission hole of the gear by the photo interrupter, and a configuration for detecting the detected portion of the gear by the photo reflector, or the pointer itself by the photo reflector or the like is adopted. A configuration for direct detection may be employed.

  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.

Although several embodiments of the present invention have been described, the scope of the present invention is not limited to the above-described embodiments, but includes the scope of the invention described in the claims and equivalents thereof. The invention described in the scope of claims attached to the application of this application will be added below. The item numbers of the claims described in the appendix are as set forth in the claims attached to the application of this application.
[Appendix]
<Claim 1>
A first motor and a second motor;
A first guideline and a second guideline;
A first wheel train mechanism and a second wheel train mechanism that transmit rotations of the first and second motors to the first and second hands, respectively, and rotate the first and second hands, respectively. ,
Pointer position data storage means for storing position data of the first and second pointers;
A hand movement processing means for supplying a driving pulse to the first and second motors to move the first and second hands and executing the hand movement processing for updating the position data;
Pointer position detection means for detecting the positions of the first and second pointers according to the states of the first and second wheel train mechanisms;
Predetermined position movement control means for controlling the hand movement processing means so that the first and second hands move to a predetermined position in a straight line based on the position data;
Determining means for determining whether or not the first and second hands are detected at the predetermined position by the pointer position detecting means after the control of the predetermined position movement control means;
A correction means for associating the positions of the first and second pointers with the position data of the pointer position data storage means when it is determined that the position is not detected by the determination means;
Azimuth detecting means for obtaining azimuth data;
Based on the azimuth data obtained by the azimuth detection means and the position data of the position data storage means, the first and second hands arranged in a straight line indicate a predetermined direction based on the azimuth data. Azimuth display control means for controlling the hand movement processing means,
An electronic timepiece with a azimuth display function.
<Claim 2>
A mode switching means for switching between a time display mode for displaying time by the first and second hands and a azimuth display mode for displaying azimuth;
When the mode switching means switches to the azimuth display mode, control of the hand movement processing means by the predetermined position movement control means, detection by the pointer position detection means, and judgment by the judgment means are sequentially executed, The control of the hand movement processing means by the azimuth display control means is started when it is judged by the judgment means that the first and second hands are detected at the predetermined position. Item 1. An electronic timepiece with an orientation display function according to Item 1.
<Claim 3>
When the mode switching unit switches to the azimuth display mode, the control of the hand movement processing unit by the predetermined position movement control unit, the detection by the pointer position detection unit, and the determination by the determination unit are sequentially executed, When it is determined by the determining means that the first and second hands are not detected to be in the predetermined position, the process of the correcting means is executed, and thereafter, the hand movement processing means of the direction display control means 3. The electronic timepiece with an orientation display function according to claim 2, wherein control is started.
<Claim 4>
The pointer position detection means is configured to detect whether or not the first and second pointers are in a specific position according to a state of the first and second wheel train mechanisms.
4. The electronic timepiece with a direction display function according to claim 1, wherein the predetermined position includes the predetermined position in which the first and second hands are in a straight line. 5. .
<Claim 5>
The first and second pointers are provided so as to rotate about the same rotation axis, respectively.
The arrangement state in which the first and second pointers generated by the control of the predetermined position movement control means and the direction display control means are in a straight line means that the first pointer and the second pointer are mutually connected. The electronic timepiece with an orientation display function according to any one of claims 1 to 4, wherein the electronic timepiece is in a state of pointing in a direction different by 180 °.
<Claim 6>
The pointer position detecting means detects whether or not a plurality of transmission holes respectively provided in a plurality of gears constituting the first wheel train mechanism and the second wheel train mechanism are overlapped at a detection position. The electronic timepiece with a direction display function according to claim 1, wherein the electronic timepiece has a direction display function.

1 Electronic clock 3 Minute hand (first pointer)
4 Hour hand (second pointer)
20 Wheel train mechanism 30 Analog movement 52 Motor (first motor)
53 Motor (second motor)
31 1st detection part (pointer position detection means)
32 2nd detection part (pointer position detection means)
P detection position P2 second detection position 33 magnetic sensor 34 direction detection unit (direction detection means)
36 ROM
37 RAM
37b Minute hand position data storage unit (pointer position data storage means)
37c Hour hand position data storage section (pointer position data storage means)
47 Switch part 24 second hand wheel 24h1-24h7 Transmission hole 25 Minute hand wheel 25h Transmission hole 26 Intermediate wheel 26h Transmission hole 27 Hour hand wheel 27h Transmission hole 213 Intermediate wheel 213h Transmission hole 214 Third wheel 214h Transmission hole 217 Detection wheel 217h Transmission hole

Claims (6)

A first guideline and a second guideline;
Azimuth detecting means for obtaining azimuth data;
Mode switching means for switching between a time display mode for displaying the time and the azimuth display mode for displaying the azimuth by the first and second hands;
Pointer position data storage means for storing position data of the first and second pointers;
A hand movement processing means for moving the first and second hands and executing a hand movement process for updating the position data;
Predetermined position movement control means for controlling the hand movement processing means so as to move to a predetermined position where the first and second pointers are linear based on the position data;
Determining means for determining whether or not the first and second hands are detected at the predetermined position ;
Based on the azimuth data obtained by the azimuth detection means and the position data of the pointer position data storage means, the first and second hands that are in a linear arrangement relationship have a predetermined direction based on the azimuth data. Bearing display control means for controlling the hand movement processing means to point,
Equipped with a,
When the mode switching means switches to the azimuth display mode, control of the hand movement processing means by the predetermined position movement control means and judgment by the judgment means are sequentially executed, and the judgment means performs the first operation. When it is determined that the second pointer is detected at the predetermined position, control of the hand movement processing means by the azimuth display control means is started . And a correction unit that associates the positions of the first and second pointers with the position data of the pointer position data storage unit when it is determined by the determination unit that the position is not detected. The electronic timepiece with an orientation display function according to claim 1.   When the mode switching means switches to the azimuth display mode, control of the hand movement processing means by the predetermined position movement control means and judgment by the judgment means are sequentially executed, and the judgment means performs the first operation. And when it is determined that the second pointer is not detected to be in the predetermined position, the processing of the correcting means is executed, and then the control of the hand movement processing means by the azimuth display control means is started. The electronic timepiece with an orientation display function according to claim 2. Comprising pointer position detection means for detecting whether or not the first and second pointers are in a specific position according to the states of the first and second wheel train mechanisms;
The directional display function-equipped electronic device according to any one of claims 1 to 3, wherein the specific position includes the predetermined position where the first and second hands are linear. clock. The first and second pointers are provided so as to rotate about the same rotation axis, respectively.
The arrangement state in which the first and second pointers generated by the control of the predetermined position movement control means and the azimuth display control means are linear means that the first pointer and the second pointer are The electronic timepiece with a direction display function according to any one of claims 1 to 4, wherein the electronic timepiece is in a state in which directions different from each other by 180 ° are indicated.   The pointer position detecting means detects whether or not a plurality of transmission holes respectively provided in a plurality of gears constituting the first wheel train mechanism and the second wheel train mechanism are overlapped at a detection position. 5. The electronic timepiece with a direction display function according to claim 4, wherein the electronic timepiece has a direction display function.

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