JP4581443B2 - Electronic clock with calendar display function - Google Patents

Description

  The present invention relates to an electronic timepiece with a calendar display function that automatically performs month-end correction.

2. Description of the Related Art Conventionally, an electronic timepiece (an electronic timepiece with a calendar display function) having a calendar display mechanism that displays a calendar such as day and month is known (for example, Patent Documents 1 and 2). As a calendar display mechanism of this clock, for example, a month board (month indication wheel) in which numbers “1” to “12” are arranged, and a date board (day in which numbers “1” to “31” are arranged) A display wheel is provided, and the month and date are displayed by rotating the moonboard and dateboard.
In addition, this type of electronic timepiece with calendar display function displays a non-existing day (February 30th, April 31st, etc.) that does not actually exist if only one day is sent. A mechanical switch that opens and closes according to the rotation position of the plate or date plate, and has a month-end correction function that detects the month and day displayed by this switch and feeds the date so that the existing date is displayed There is.
International Publication No. WO99 / 34264 JP 2003-255063 A

The mechanical switch includes a metal material leaf spring that rotates integrally with the calendar detection gear, a metal terminal that is always in contact with the leaf spring, and a switch terminal that is in contact with the leaf spring in accordance with the rotational position of the gear. By providing this, conduction is established between these terminals. However, since the leaf spring is always in contact with the metal terminal, the load torque (rotational load caused by frictional resistance) is large, which is not preferable from the viewpoint of reducing power consumption.
Further, since the metal terminal is provided on the center side of the gear and the switch terminal is arranged on the outer side in the circumferential direction, there is a problem that it is difficult to arrange these terminals when the diameter of the gear is small.
The present invention has been made in view of the above-described circumstances. By reducing the load torque and reducing the size of a mechanical switch, an electronic device with a calendar display function that reduces power consumption and optimizes a switch layout. The purpose is to provide a watch.

  In order to solve the above-mentioned problems, the present invention provides a calendar display function-equipped electronic timepiece that detects a calendar by detecting a rotational position of a gear that rotates in conjunction with a calendar display car that displays a calendar or a calendar display car using a mechanical switch. The mechanical switch is disposed on the same circumference around the axis of the gear, and contacts with the spring contact according to the rotational position of the gear. A plurality of switch terminals including a power supply terminal, wherein the plurality of switch terminals are a power supply terminal and a detection terminal for continuity detection, and the spring contact depends on a rotational position of the gear. A plurality of legs that are in contact with the terminals and electrically connected between the terminals, and the gear is a month indicating wheel or a month detecting gear, the month indicating wheel and the month The detection gear is provided on the same axis. The plurality of switch terminals are a power supply terminal, a first detection terminal for February detection, and a second detection terminal for small moon detection, and a plurality of legs of the plurality of switch terminals and the spring contacts. In the case of February, the power terminal and the second detection terminal are in contact with the foot, respectively, and in the case of a small moon, the power terminal and the second detection terminal are in the foot, respectively. It arrange | positions so that it may contact, It arrange | positions so that it may not contact except a 2nd month and a small moon, and the said several switch terminal and the several leg part of the said spring contact.

  According to this configuration, the mechanical switch for calendar detection is arranged on the same circumference around the axis of the gear and the spring contact that rotates integrally with the gear, and according to the rotational position of the gear. Since it is composed of a plurality of switch terminals including the power supply terminals that come into contact with the spring contacts, the load contacts can be reduced because the spring contacts and the power supply terminals are not always in contact, and the space for arranging the switch terminals is saved. Can be.

Moreover, it is preferable to arrange | position the front-end | tip of the leg part of the said spring contact on the same periphery, and it is preferable that the said spring contact is set as the 3 leg | foot structure provided with the said three leg parts. Furthermore, it is preferable that the spring contact is formed in a bilaterally symmetric shape to improve the rotation balance. The gear provided with the mechanical switch is preferably a gear in a reduction wheel train of a calendar display mechanism for rotating the calendar display wheel.

  According to the present invention, a mechanical switch for performing calendar detection is arranged on the same circumference centering on the axis of the gear, and a spring according to the rotational position of the gear. By configuring with a plurality of switch terminals including power supply terminals that come in contact with the contacts, the load contacts can be reduced because the spring contacts and the power supply terminals are not always in contact, and the space for arranging the switch terminals is saved. can do.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the present embodiment, the case where the present invention is applied to a wristwatch is illustrated. In the following description, all dates are based on the solar calendar.

  FIG. 1 is a diagram showing an external configuration of a wristwatch according to an embodiment of the present invention. As shown in FIG. 1, the wristwatch 1 includes a timepiece main body 1a and a belt 1b connected to the timepiece main body 1a. The timepiece main unit 1 a includes a housing 200 and a disk-shaped time display board 202 provided on the housing 200, and a second hand 61, a minute hand (long hand) 62, and an upper surface of the time display board 202. , Three indicator hands consisting of hour hand (short hand) 63 are provided. On the time display board 202, symbols indicating time are arranged at equal intervals along the circumference of the time display board 202, and numerals or symbols indicated by each of the display hands (in this embodiment, the symbols include characters). The current time is displayed.

  The time display board 202 is provided with a date display window 204, a 24-hour display unit 205, a month display unit 206, and a year display unit 208, which are hollowed out in a substantially rectangular shape. In the day display window 204, any one of “1” to “31” indicating “day” of the calendar is displayed. In this case, as will be described later, the first digit and the tenth digit are attached to different date indicators (calendar display vehicles), and the “day” of the calendar is indicated by the number attached to each date indicator. The On the 24-hour display portion 205, symbols indicating times divided into 24 are arranged at equal intervals along the circumference, and “time” is displayed by the symbol indicated by the display pointer 205a.

  In addition, the month display unit 206 indicates a calendar “month” along its circumference, for example, any symbol from “JAN” (in January) to “DEC” (in December). Are arranged at equal intervals, and the “month” of the calendar is displayed by a symbol indicated by the display pointer 206a. In the year display portion 208, any one of the numbers “0” to “3” is displayed at equal intervals along the circumference. If the year is a leap year, the display pointer 208a indicates the number “0”. After that, if “1”, “2”, and “3” are pointed out, it indicates the number of years from the leap year. Thereby, the user can know the “year” of the calendar.

  A disc-shaped ground plate 303 (FIG. 12) having substantially the same shape as the time display board 202 is disposed in the watch main body 1a, and an auto-calendar mechanism (calendar display mechanism) is placed on the front side of the watch with the ground board 303 interposed therebetween. ) Is arranged, and a basic mechanism as a watch is arranged on the back side. The base plate 303 functions as a member that pivotally supports one end of each gear of the auto-calendar mechanism.

  FIG. 2 is a diagram showing an auto-calendar mechanism, and FIG. 3 is an enlarged view thereof. This auto-calendar mechanism is supported on one surface of the main plate 303 (the front side of the timepiece 1), and its drive source is a piezoelectric actuator (drive means) 71. The piezoelectric actuator 71 includes a piezoelectric element that is a vibrator. The piezoelectric actuator 71 oscillates the outer periphery of the piezoelectric rotor 72, thereby rotating the piezoelectric rotor 72. The piezoelectric rotor 72 is integrally provided with a piezoelectric rotor pinion 72a. The intermediate wheel 73 is engaged with the piezoelectric rotor pinion 72a, and the intermediate wheel 74 is engaged with the intermediate pinion 73a. An intermediate wheel 75 is engaged with the intermediate wheel pinion 74a of the intermediate wheel 74, and an intermediate wheel 76 is engaged with the intermediate wheel pinion 75a. The intermediate wheel 76 meshes with a control wheel pinion 77, and the control wheel pinion 77 is formed integrally with the control wheel 78. Up to this point, the speed reducing wheel train is for turning the control wheel 78. Reference numeral 211 denotes a jumper for positioning the control wheel pinion 77.

  The control wheel 78 includes a plurality of claw wheels having different numbers of claws, and any one of the claw wheels is located above the control wheel 78 in FIG. )) A date indicator driving wheel 87 for turning 89, a date indicator driving wheel 90 for turning the tenth date indicator (10th indicator (calendar indicator)) 92, and the month located at the lower right of the control wheel 78 in the figure. It meshes with a month display intermediate wheel 79 that rotates a car (calendar display car) 82. Here, numbers “0” to “9” are displayed at equal intervals in the circumferential direction on the outer peripheral surface of the first date wheel 89, and “empty area” and “ Numbers “1” to “3” are displayed at equal intervals in the circumferential direction. Note that the “empty area” is an area where there is no numerical description, and when the corresponding day corresponds to a single-digit “day” (that is, 1st to 9th), it is ranked 10th.

  In the date display window 204 described above, numbers “0” to “9” on the first date wheel 89 and “empty area” or numbers “1” to “3” on the tenth date wheel 92 are displayed. Depending on the combination, any number from “1” to “31” indicating the “day” of the calendar is displayed.

  When the above-described control wheel 78 rotates, first, the date indicator driving wheel 87 and the 1st date pinion 88 rotate through the 1st feed claw of the gear body corresponding to the 1st date wheel 89, and 1 is integrally formed therewith. The second date wheel 89 rotates, and the numbers “0” to “9” on the outer circumferential surface thereof are sent in the circumferential direction once a day in principle. In accordance with the rotation of the control wheel 78, the rotation of the 1st date wheel 89 advances, and when the 10th position is reached, the 10th position feed claw of the gear body corresponding to the 10th date wheel 92 is reached. , The date indicator driving wheel 90 and the tenth date pinion 91 are rotated, and the tenth date indicator 92 is rotated integrally therewith, and the “empty area” or the numbers “1” to “3” on the outer peripheral surface thereof. Are sent in the circumferential direction once every 10 days.

  In response to the rotation of the control wheel 78, the rotation of the 1st date indicator 89 and the 10th date indicator 92 advances, and when the date on which the indication of “month” is advanced, this time, the month indicator 82 is displayed. The month display intermediate wheel 79 and the month detection wheel 80 are rotated through the corresponding month feeding claws of the gear body, and the month wheel 82 is rotated integrally therewith. Then, the display pointer 206a is rotated, and any one of the symbols “JAN” (indicating January) to “DEC” (indicating December) indicating the “month” of the calendar on the month display unit 206 indicates. The calendar “month” is displayed. This is the reduction gear train for turning the month wheel 82.

  The month detection wheel 80 meshes with the year display intermediate wheel 83, and the year display intermediate wheel 83 meshes with the year feed wheel 84. An annual wheel (calendar display wheel) 85 meshes with the year feeding wheel 84, and a display pointer 208a indicating the “year” of the calendar is connected to the year wheel 85. In this case, the annual feeding wheel 84 is configured to rotate the year wheel 85 by 90 ° for the first time after a period of one year. Accordingly, the display pointer 208a is sent once a year. And if it is a leap year, if the display pointer 208a points to the number “0” and then points to “1”, “2”, “3”, for example, it displays the year from the leap year, Thereby, the “year” of the calendar is displayed.

  In the 24-hour display unit 205, the driving force is taken from the driving source of a hand movement mechanism E (FIG. 13) described later of the timepiece disposed on the back side of the main plate 303, unlike the driving source of the auto-calendar mechanism. That is, the cylindrical vehicle body 93 is integrated with the hour wheel (the hour wheel (short hand) 63 supporting the hour hand 63) of the hand movement mechanism E, and the 24-hour detection wheel 94 is engaged with the cylindrical vehicle body 93. The 24-hour wheel 95 is engaged with the 24-hour detection wheel 94, and the display pointer 205a of the 24-hour display unit 205 is rotated by the rotation of the 24-hour wheel 95. This display indicator 205a is sent once per hour.

Next, calendar detection (month detection, year detection, and day detection) will be described.
In the above configuration, the month detection vehicle 80 displays the month displayed in February or a “small” month excluding February (February, April, June, 9 A spring switch 330 is provided for detecting three patterns of the month, “Month, November” or “Large”. The spring switch 330 is a mechanical switch that is opened and closed in accordance with the rotational position of the month detection wheel 80. As shown in FIGS. 2 and 4, a spring contact 98 fixed to the support shaft 81 of the month detection wheel 80 and , And a plurality of switch terminals 98T constituting a part of the wiring pattern of the circuit board 303a disposed on the ground plate 303. 5 is a plan view of the spring contact 98, and FIG. 6 is a view showing the arrangement of the switch terminal 98T.

  As shown in FIG. 5, the spring contact 98 is formed of an elastic metal material, such as phosphor bronze or stainless steel, and has a hole 99 inserted through the support shaft 81 of the month detection wheel 80 at substantially the center. The three legs 98a, 98b, and 98c extending outward are integrally formed in a three-leg configuration. These feet 98a to 98c are formed to have the same length, and a circular recess 98d is provided at the tip, and the recess 98d makes point contact with the switch terminal 98T, thereby reducing the frictional resistance with the switch terminal 98T. is doing. In the present embodiment, the three legs 98a to 98c are arranged at intervals of 150 degrees, 60 degrees, and 150 degrees, and are formed in a bilaterally symmetric shape with reference to the one-dot chain line shown in FIG. By forming the symmetrical shape in this way, the rotation balance can be improved with the center of gravity position at the center, and the rotation of the month detection wheel 80 is not adversely affected, and the contact pressure with the switch terminal 98T is uneven. To avoid the bias of the load torque.

  As shown in FIG. 6, the switch terminal 98T includes a power supply terminal 98T1, a first detection terminal 98T2 for February detection, and a second detection terminal 98T3 for small moon detection, and these terminals 98T1 to 98T3. Are arranged on the same circumference around the axis 81 of the month detection wheel 80. Here, in FIG. 6, the position of the spring contact 98 when the displayed month is January is simply shown, and the rotation direction of the spring contact 98 (= the rotation direction of the month detection wheel 80) is denoted by a symbol. Indicated by α.

  In the configuration of the present embodiment, that is, in the configuration in which the month detection wheel 80 (spring contact 98) rotates 30 degrees per month, the first detection terminal 98T2 is used as a reference (0-degree position) as shown in the figure. The terminal 98T1 is disposed at positions of 60 °, 180 °, and 330 °, and the second detection terminal 98T3 is disposed at positions of 120 °, 210 °, and 270 °, respectively. That is, seven switch terminals 98T are arranged on the same circumference. The power supply terminal 98T1 is supplied with power (VDD line) of a power supply unit C (FIG. 13) described later, and the first detection terminal 98T2 is connected to a terminal CS0 of the control unit A (FIG. 13) described later. The second detection terminal 98T3 is connected to the terminal CS1 of the control unit A.

  Thus, as shown in the states of the monthly terminals CS0 and CS1 displayed in FIG. 7, when the displayed month is February, the spring contact 98 is connected to the power supply terminal 98T1 and the first detection terminal 98T2. When the power (VDD) is supplied to the terminal CS0 and the displayed month is a small month, the spring contact 98 contacts the power supply terminal 98T1 and the second detection terminal 98T3 to the terminal CS1. Electric power (VDD) is supplied. The control unit A detects the combination of the states of the terminal CS0 and the terminal CS1 (H level or L level), and displays it based on the month information detection pattern (2-bit pattern) shown in FIG. It is possible to detect either “February”, “Small month” except February, or “Large month”.

  As described above, the spring switch 300 is configured so that the spring contact 98 does not come into contact with the switch terminal 98T including the power supply terminal 98T1 in the case of a large moon. ing. Further, since the switch terminals 98T are arranged on the same circumference, the area where the month detection wheel 80 is small and the spring switch can be arranged (when the diameter of the month detection wheel 80 is 4.7 mm, the range is a diameter of 3.0 mm). Even if is small, it can be arranged in the area.

  In the above configuration, the intermediate detection pinion 83a of the year display intermediate wheel 83 is engaged with the year detection wheel 86, and the year detection wheel (detection wheel) 86 is provided with a spring switch 320 substantially similar to the spring switch 330. It is done. Specifically, as shown in FIGS. 2 and 4, a spring contact 96 is provided on the support shaft of the year detection wheel 86, and on the circuit board facing the spring contact 96, the year detection wheel 86 is rotated. Correspondingly, a switch terminal 96 </ b> T that conducts via a spring contact 96 that rotates with the year detection wheel 86 is provided.

  Here, FIG. 9 is a diagram showing the arrangement of the switch terminals 96T. As shown in this figure, the switch terminal 96T is a power supply terminal 96T1 and a leap year detection terminal 96T2 which are conducted through a spring contact 96 when the displayed year is “leap year”. Based on the year information detection pattern shown in FIG. 10, the control unit A detects opening / closing (H level or L level) of the spring switch 320 via the terminal CS2 connected to the leap year detection terminal 96T2. Two patterns are detected in which the year is “leap year” or “non-leap year”. Also in this spring switch 320, in the case of “non-leap year”, the spring contact 96 does not come into contact with the power supply terminal 96T1 and the leap year detection terminal 96T2, so that a case where load torque is generated is avoided. The spring contact 96 is the same as that of the spring contact 98, thereby sharing parts.

  A light detection pattern (not shown) provided with a reflective region and a non-reflective region is provided on the back surface of the first date wheel (detection wheel) 89 and the 10th date wheel (detection wheel) 92. A plurality of photo reflectors (reflection photosensors) that read this pattern are provided on a substrate provided on the base plate 303. Specifically, two photo reflectors that irradiate light at different positions and receive the reflected light are arranged on the substrate facing the 10th date indicator 92, Each photo reflector is provided with a light detection pattern that makes it possible to determine whether the displayed day is “00or10”, “20”, or “30”. One of the two photo reflectors is connected to the terminal PT2 of the control unit A, and the other is connected to the terminal PT3. Also, two photo reflectors are arranged on the substrate facing the first date wheel 89, and the first date “date” displayed by each photo reflector is “ A light detection pattern is provided that makes it possible to determine any one of “2-8”, “9”, “0”, and “1”. One of the two photo reflectors is connected to the terminal PT0 of the control unit A, and the other is connected to the terminal PT1.

  As shown in the day information detection pattern in FIG. 11, the control unit A determines whether the displayed 10th “day” is “0or1” or “2” based on the light reception results of these four photo reflectors. , “3” is detected, and the displayed first “day” is “9”, which is the first day of the days (29, 30, 31) that do not exist in the small month. , “0”, “1”, or “2-8”. That is, the number of detection patterns for the day is 12. However, this detection pattern includes a non-existing day (0 day, 32-38 day, 39 day), and whether the day detection is an existing day as described later (whether month-end correction is necessary). It is only necessary to detect four types of detection patterns of “1 to 28 days”, “29 days”, “30 days”, and “31 days”. .

  As described above, in the present embodiment, the date detection using a gear having a large number of detection patterns and a small reduction ratio with respect to the piezoelectric rotor 72, that is, a gear having a small rotational torque (date wheels 89 and 92) is not used. A photo-reflector with relatively high durability is used for contact detection, and the above-mentioned spring switch is used for other calendar detection, thereby providing a calendar detection mechanism that is excellent in durability, load torque reduction, and power consumption reduction. Provided.

Next, feed amount detection and 24:00 detection of the piezoelectric rotor 72 will be described.
The feed amount of the piezoelectric rotor 72 is detected by a spring switch 300 provided in the above-described intermediate wheel 75 and substantially the same as the spring switch 330 described above. Specifically, as shown in FIG. 12, a spring contact 301 is provided on the support shaft of the intermediate wheel 75, and on the circuit board facing the spring contact 301, the spring contact is made according to the rotational position of the intermediate wheel 75. A switch terminal 302 is provided which conducts through 96. This switch terminal 302 is connected via the spring contact 301 every time the feed amount of the piezoelectric rotor 72 becomes a feed amount that feeds the calendar for one day, that is, every time the intermediate wheel 75 rotates by an angle corresponding to the feed amount. Thus, the circuit board 303a is configured as a part of the wiring pattern so as to switch from a conductive state (closed state) to a non-conductive state (open state). The switch terminal 302 is connected to the control unit A. The control unit A detects the switching of the spring switch 300 from the open state to the closed state, whereby the feed amount of the piezoelectric rotor 72 feeds the calendar for one day. Detects that the feed amount has been reached. That is, the spring switch 300 functions as a rotor feed amount detection unit that detects the feed amount of the piezoelectric rotor 72.

  The 24-hour detection wheel 94 is provided with a spring switch 310 that is substantially the same as the spring switch 330, and the spring switch 310 detects that the display pointer 205a indicates “midnight”. Specifically, as shown in FIG. 2, the 24-hour detection wheel 94 is provided with a spring contact 97, and the 24-hour detection wheel 94 is set to “midnight” on the circuit board facing the spring contact 97. Is provided with a switch terminal (not shown) that conducts through the spring contact 97 when the rotation position is reached. The opening / closing of the spring switch 310 is detected by the control unit A described later. That is, the spring switch 310 functions as a 24-hour detection means for detecting “midnight”. This spring switch 310 is also configured so that the spring contact 97 does not come into contact with the switch terminal (including the power supply terminal) except for “midnight”, and no load torque is generated except for “midnight”. ing. Note that the spring contacts 301 and 97 are the same as the spring contact 98 of the spring switch 330, and parts are shared.

  FIG. 13 is a diagram showing an electrical configuration of the wristwatch 1 together with a mechanical configuration. As shown in the figure, the wristwatch 1 includes a control unit A, a power generation unit B, a power supply unit C, a pointer drive unit D, a hand movement mechanism E, a date mechanism drive unit F, an auto-calendar mechanism (piezoelectric rotor). 72 only).

  The power generation unit B generates AC power and includes a rotating weight 45. The rotating weight 45 is provided so as to be able to turn with the movement of the user's wrist or the like, so that the turning (kinetic energy) of the rotating weight 45 is transmitted to the power generation device 40 via the speed increasing gear 46. It has become. The power generation apparatus 40 includes a power generation stator 42, a power generation rotor 43 that is rotatably provided inside the power generation stator 42, and a power generation coil 44 that is electrically connected to the power generation stator 42. The power generation rotor 43 is rotated by the turning (kinetic energy) of the rotary weight 45, and an AC voltage is induced in the power generation coil 44 by this rotation. In other words, while the wristwatch 1 is worn by the user, the rotating weight 45 turns as the user performs some operation to generate power.

  The power supply unit C rectifies and stores the AC voltage from the power generation unit B, boosts the stored power, and supplies power to each component. More specifically, the power supply unit C includes a diode 47 that functions as a rectifier circuit, a large-capacitance capacitor 48, and a step-up / down circuit 49. The step-up / step-down circuit 49 can perform step-up and step-down in multiple stages using the three capacitors 49a, 49b and 49c, and adjusts the voltage supplied to the pointer drive unit D by the control signal from the control unit A. be able to. Further, the output voltage of the step-up / step-down circuit 49 is also supplied to the control unit A by a monitor signal, whereby the control unit A monitors the output voltage. Here, the power supply unit C takes Vdd (high voltage side) as the reference potential (GND) and generates Vss (low voltage side) as the power supply voltage.

  The pointer drive unit D supplies various drive pulses to the hand movement mechanism E under the control of the control unit A. In the present embodiment, the pointer drive unit D includes a second hand drive unit D1 that drives the second hand 61, and an hour / minute hand drive unit D2 that drives the hour hand 63, the minute hand 62, and the display pointer 205a for 24 hour display. . More specifically, the second hand drive unit D1 includes a bridge circuit constituted by a p-channel MOS 33a and an n-channel MOS 32a connected in series, and a p-channel MOS 33b and an n-channel MOS 32b. The second hand drive unit D1 includes rotation detection resistors 35a and 35b connected in parallel to the p-channel MOSs 33a and 33b, and a sampling p-channel MOS 34a and a sampling p-channel MOS 34a for supplying chopper pulses to the resistors 35a and 35b, respectively. 34b. Therefore, by applying control pulses having different polarities and pulse widths from the control unit A to the respective gate electrodes of the MOSs 32a, 32b, 33a, 33b, 34a and 34b at the respective timings, a part of the hand movement mechanism E is obtained. For example, various drive pulses such as drive pulses having different polarities can be supplied to the second hand moving mechanism E1 that is configured.

  The hour / minute hand driving unit D2 is configured in substantially the same manner as the second hand driving unit D1, and a control pulse having a polarity and a pulse width different from the control unit A is applied to form the hour / minute hand constituting a part of the hand movement mechanism E. Various drive pulses such as drive pulses having different polarities can be supplied to the hand movement mechanism E2.

  The hand movement mechanism E includes a second hand movement mechanism E1 and an hour / minute hand drive unit E2. The second hand moving mechanism E <b> 1 includes a stepping motor 10, and the stepping motor 10 rotationally drives the second hand 61. More specifically, the stepping motor 10 is excited in the drive coil 11 that generates a magnetic force by the drive pulse supplied from the second hand drive unit D1, the stator 12 excited by the drive coil 11, and the stator 12 inside. The rotor 13 is rotated by a magnetic field. Further, the stepping motor 10 is constituted by a PM type (permanent magnet rotating type) in which the rotor 13 is constituted by a disk-shaped two-pole permanent magnet. The stator 12 is provided with a magnetic saturation portion 17 so that different magnetic poles are generated in the respective phases (poles) 15 and 16 around the rotor 13 due to the magnetic force generated in the drive coil 11. Further, in order to define the rotation direction of the rotor 13, an inner notch 18 is provided at an appropriate position on the inner periphery of the stator 12, so that cogging torque is generated to stop the rotor 13 at an appropriate position. ing. The rotation of the rotor 13 of the stepping motor 10 is transmitted to the second hand 61 by a wheel train 50 including a second intermediate wheel 51 and a second wheel 52 meshed with the rotor 13 via the kana, and the second hand 61 is rotationally driven.

  The hour / minute hand drive unit E2 includes a stepping motor 20, and when the stepping motor 20 rotates and drives the minute hand 62, the hour hand 63 and a display pointer for displaying 24 hours are interlocked with the rotation of the minute hand 62. 205a is rotated. More specifically, the stepping motor 20 includes a stator 22 and a rotor 23, similar to the stepping motor 10, and the stator 22 has different magnetic poles depending on the magnetic force generated by the drive coil 21. 27 A of magnetic saturation parts are provided so that it may generate | occur | produce in (pole) 25 and 26. Further, in order to define the rotation direction of the rotor 23, an inner notch 28A is provided at an appropriate position on the inner periphery of the stator 22 so that cogging torque is generated and the rotor 23 stops at an appropriate position. Yes.

  The rotation of the rotor 23 of the stepping motor 20 is such that the fourth wheel 26, third wheel 27, second wheel 28, minute wheel 29, hour wheel (hour indicating wheel) 93a meshed with the rotor 23 via the kana. These are transmitted to the hands by a train wheel 30 comprising a cylindrical body 93, a 24-hour detection wheel 94 and a 24-hour wheel 95. A minute hand 62 is connected to the center wheel & pinion 29, an hour hand 63 is connected to the hour wheel 93a, and a display indicator 205a is connected to the 24-hour wheel 95. The hour and minute are displayed by these hands in conjunction with the rotation of the rotor 23.

  Under the control of the control unit A, the date mechanism driving unit F applies an AC voltage to the piezoelectric element of the piezoelectric actuator 71 to cause the piezoelectric actuator 71 to vibrate, and the vibration causes the outer periphery of the piezoelectric rotor 72 to strike. Thus, the piezoelectric rotor 72 is driven to rotate, thereby driving the auto-calender mechanism. Here, it is desirable that the date mechanism driving unit F is disposed to face the hand movement mechanism E through the main plate.

  FIG. 14 is a block diagram illustrating a functional configuration of the control unit A. As illustrated in FIG. The control unit A controls each part of the wristwatch 1, and includes a timepiece control unit A1 that controls the hand drive unit D and the hand movement mechanism E, and a calendar control unit A2 that controls the auto-calendar mechanism and performs calendar feeding processing. It has. The calendar control unit A2 is electrically connected to the above-described spring switches 300, 310, 320, 321, 332, and a photo reflector (indicated by PR in the figure), and the spring switch 300 provided in the 24-hour detection wheel 94 is In the closed state, as the calendar feeding process, a one-day feeding process for rotating the auto-calendar mechanism for one day, and a calendar for detecting whether the day is sent and determining whether it is a non-existing day. If it is determined that it is a non-existing day, the auto-calendar mechanism is driven to perform so-called month-end correction to display the actual existing date.

  FIG. 15 is a flowchart showing the calendar feeding process. FIG. 16 is a diagram showing a timing chart for the 1-day feed process during the calendar feed process. First, the calendar control unit A2 makes the time “midnight”, and as shown in FIG. 16, the spring switch 310 provided in the 24-hour detection wheel 94 is closed and the terminal connected to the spring switch 310 is set to H When it is detected that the level has been switched (step S1), a date feed signal (start signal) is output to the date mechanism drive unit F. In this case, when the date mechanism driving unit F outputs an AC signal for driving the piezoelectric actuator 71, the piezoelectric rotor 72 is rotationally driven to drive the auto-calendar mechanism (step S2). Then, the feed amount of the piezoelectric rotor 72 becomes a feed amount for one day, the spring switch 300 for detecting the feed amount of the piezoelectric rotor 72 is switched from open to closed, and the terminal connected to the spring switch 300 changes from H level to L. When it is detected that the level has been switched, a stop signal is output to the date mechanism drive unit F to stop driving the auto calendar mechanism (step S3). The above is the 1-day feeding process. As described above, since the feed amount of the piezoelectric rotor 72 is detected by the spring switch 300 when the piezoelectric actuator 71 is driven, the feed amount of the piezoelectric rotor 72 is detected by a photo reflector with relatively large power consumption. Compared to the above, it is possible to reduce the power consumption when simultaneously driving the piezoelectric actuator 71 and detecting the feed amount of the piezoelectric rotor 72.

  Subsequently, the calendar control unit A2 executes a calendar detection process. Specifically, the calendar control unit A2 first detects the terminal CS1 (step S4), and the currently displayed month is “large month” based on the detected potential (H level or L level). Is determined (step S5). Specifically, as shown in FIG. 8, the calendar control unit A2 determines “large moon” if the terminal CS1 is at the L level. If it is determined as “large month”, since the “large month” is a month with no non-existing date, it can be determined that the existing date is displayed, and the calendar control unit A2 ends the calendar feeding process. .

  If it is determined in step S5 that the currently displayed month is not the “large month” (that is, it corresponds to the set calendar information that requires month end correction (the terminal CS1 is at the H level)), the calendar control unit A2 The photo reflector corresponding to PT3 is driven, and the detection result of the photo reflector is detected via the terminal PT3 (step S6). Then, the calendar control unit A2 determines whether the currently displayed “day” corresponds to “1 to 19 days” based on the detected potential (step S7). Specifically, as shown in FIG. 11, if the terminal PT3 is at the L level, the calendar control unit A2 is displayed because the tenth value of “day” is “0” or “1”. It is determined that the “day” is “1 to 19 days”. When it is determined as “1 to 19 days”, it can be determined that the day when month-end correction is unnecessary, that is, the existence date is displayed, and thus the calendar control unit A2 ends the calendar feeding process.

  If it is determined in step S7 that the currently displayed "day" is not "1-19 days" (that is, it corresponds to the set calendar information that requires month end correction (terminal PT3 is at H level)), calendar control unit A2 Drives the photo reflectors corresponding to the terminals PT0 to PT2, and detects the detection results of these photo reflectors via the terminals PT0 to PT2 (step S8). These photo reflectors are preferably driven at different timings. By shifting the drive timing of the plurality of photo reflectors in this way, it is possible to easily avoid the case where the rated current of the drive power source is exceeded. Then, the calendar control unit A2 determines whether or not the currently displayed day corresponds to “20 to 28 days” from the combination of the detection results of the terminals PT0 to PT2 (step S9). Specifically, as shown in FIG. 11, the calendar control unit A2 is “20 to 28 days” when the terminal PT2 is at the L level and the terminal PT1 is at the H level or the terminal PT0 is at the L level. judge. When it is determined as “20 to 28 days”, since it is a day that always exists in both the large month and the small month, it can be determined to be an existing day, and the calendar control unit A2 ends the calendar feeding process.

  That is, the calendar control unit A2 first determines whether or not the currently displayed month is a “large month”, and performs day detection only when it is not a “large month”. Accordingly, when the currently displayed month is the “large month”, the day and year are not detected, and accordingly, it is possible to save the power required for calendar detection. If it is not “large month”, the calendar control unit A2 drives only one photo reflector and determines whether or not the currently displayed day is “1 to 19 days” from the detection result. , It is determined whether or not the 10th place of the day corresponds to “1” or “0” that always exists in the small month and the large month, and if not, only the other photo reflector is driven to The position is detected. Therefore, when the 1st place of the day is “1” or “0”, it is not necessary to detect the 10th place of the day, so that the power required for calendar detection can be saved accordingly.

  If it is determined in step S9 that the currently displayed date is not “20 to 28 days” (that is, it corresponds to the set calendar information that requires month-end correction), calendar control unit A2 determines that terminal CS0 and terminal CS2 is detected (step S10), and all the year, month and day currently displayed are detected. The above is the calendar detection process. Next, the calendar correction process will be described.

  First, the calendar control unit A2 determines whether or not the currently displayed day is “31st” based on the detected date, specifically, as shown in FIG. It is determined whether or not it is at the H level (step S11). When it is determined as “31st”, the calendar control unit A2 determines whether the currently displayed month is “small month except February”, specifically, whether the terminal CS1 and the terminal CS0 are at the H level. If it is determined whether or not (step S12) and “small month excluding February” is determined, it can be determined that the non-existing date is displayed, so that the date mechanism driving unit F is displayed so that the existing date is displayed. In response to this, a date signal is output to rotate the auto-calendar mechanism for one day (step S13), and this calendar feeding process is terminated.

  By the way, in this wristwatch 1, when the power generation unit B has not generated power continuously for a predetermined period (for example, three days), the driving of the hand movement mechanism E and the auto-calendar mechanism is stopped from the normal operation mode to save power. When the power generation mode is detected and power generation by the power generation unit B is detected, the hand movement mechanism E is driven at high speed until the current time measured by the internal clock circuit is displayed, and the date corresponding to the number of days elapsed in the power saving mode is displayed. In order to proceed, the automatic calendar mechanism has a function of rotating and driving the time and calendar to the current one. At the time of this restoration, when the period of the power saving mode is, for example, 2 years or less, the auto-calendar mechanism is driven by the normal rotation in the same rotation direction as that of the normal calendar feed, while for example, when the period is 2 years or more, the reverse rotation Thus, the auto-calendar mechanism is driven by this, and the auto-calendar mechanism is rotationally driven in a rotational direction with a small rotational drive amount so as to achieve both high-speed recovery and low power consumption. However, since the return of the auto-calendar mechanism does not take account of the month-end correction, it simply advances the date by the number of days that have elapsed in the power saving mode, so “February 31”, “February 30”, and normal "February 29" may be displayed. In this embodiment, even when such a return operation is performed, the process of step S4 is performed, and the calendar correction process is defined in consideration of this case as well. When the period of the power saving mode is 2 years or more and 4 years or less, the auto-calendar mechanism may be driven by normal rotation in the same rotation direction as that of normal calendar feeding.

  In the present invention, the calendar feeding is also stopped in the power saving mode, and the calendar is reset when the time is restored. However, in the power saving mode, the time feeding is stopped and only the calendar feeding may be performed every day. . In this case, after the first 24 o'clock detection is detected by the electrical contact, a 24-hour counter is provided on the IC, and only in the power saving mode, calendar feeding is performed every 24 hours by this counter, and the processing after step S4 is performed. In other words, it is possible to avoid a long recovery time required for calendar feeding when returning to the power saving mode after being left for a long time, and to avoid an operation limitation during the recovery time.

  Specifically, in the process of step S12, when it is determined that it is not “small month except February”, that is, “February 31” is displayed, the calendar control unit A2 determines the auto-calendar mechanism. It is determined whether or not the rotation direction at the time of return is normal rotation (normal rotation) (step S14). If the rotation direction is normal rotation, the process proceeds to step S13, and the auto-calendar mechanism is rotationally driven for one day to “March 1”. After displaying “day”, the calendar feeding process is terminated. On the other hand, when it is determined that the rotation is not normal, the calendar control unit A2 determines whether or not it is leap year based on the detection result of the terminal CS2 (step S15), and in the case of leap year, the auto-calendar mechanism is driven in reverse for two days. “February 29 is displayed (step S16). If it is not a leap year, the auto-calendar mechanism is driven in reverse for three days to display“ February 28 ”(step S17), and then the calendar feeding process is performed. finish. Thus, even when “February 31” is displayed by normal rotation or reverse rotation, it is possible to appropriately correct the existing date. Note that in a wristwatch that does not have the power saving mode function, the processes in steps S15 to S17 may be omitted.

  If it is determined in step S11 that it is not “31st”, the calendar control unit A2 determines whether it is “30th” of “small month except February”, specifically, the terminal CS0 is at the L level. Then, it is determined whether or not the terminal PT2 is at the H level (step S20). If it is determined that “30 days” of “small month excluding February”, the calendar control unit A2 can determine that the existing date is displayed, and thus the calendar sending process ends.

  If it is determined in step S20 that it is not “30th” of “small month except February”, the calendar control unit A2 determines whether it is “February 30”, specifically, the terminal CS0 is at the H level. Then, it is determined whether or not the terminal PT2 is at the H level (step S21). If it is determined as “February 30”, the calendar control unit A2 determines whether or not the rotation direction at the time of return of the auto-calendar mechanism is normal rotation (normal rotation) (step S22). The auto-calendar mechanism is rotated for two days to display “March 1” (step S23), and then the calendar feeding process is terminated.

  If it is determined that the rotation is not normal (reverse rotation), the calendar control unit A2 determines whether it is a leap year based on the detection result of the terminal CS2 (step S24). If it is not a leap year, the process proceeds to step S23. The calendar mechanism is reversely driven for two days to display “February 28”. In the case of leap years, the auto-calendar mechanism is reversely driven for one day to display “February 29” (step S25). ), And finishes the calendar feeding process. Thus, even when “February 30” is displayed in the forward rotation or the reverse rotation, it is possible to appropriately correct the existing date. Note that, in a wristwatch that does not have the power saving mode function, the processes in steps S20 to S25 can be omitted.

  If it is determined in step S21 that it is not “February 30”, the calendar control unit A2 determines whether or not it is February of leap year, and specifically determines whether or not the terminal CS2 is at the L level. However, if it is determined that February is a leap year, it can be determined that the existing date is displayed, and thus the calendar feed process ends.

  When it is determined in this step S26 that it is not February of leap year, the calendar control unit A2 determines whether or not the rotation direction at the time of return of the auto-calendar mechanism is normal rotation (forward rotation) (step S27), and In the case of normal rotation, the calendar control unit A2 rotates the auto calendar mechanism for 3 days to display “March 1” (step S28). In the case of reverse rotation, the calendar control unit A2 rotates the auto calendar mechanism for 1 day. Then, “February 28” is displayed (step S29), and then the calendar feeding process is terminated. Thus, even when “February 29” is displayed in the forward rotation or the reverse rotation, it is possible to appropriately correct the existing date. It should be noted that the processing in steps S27 to S29 can be omitted in a wristwatch that does not have the power saving mode function.

  As described above, the calendar control unit A2 detects the currently displayed month, and only determines that this month is not the “large month” (that is, the “small month”). Day ”or“ year ”) is detected to determine whether the displayed date is an existing date, so if the currently displayed month is a“ large month ”, the day or year is detected. No need. Therefore, power consumption required for calendar detection can be reduced. The calendar control unit A2 detects the 10th place of the currently displayed day, and this value corresponds to “1” or “0” in which the 10th place of the day always exists in the small month and the large month. Since the first place of the day is detected only when applicable, if the 10th place of the currently displayed day is “1” or “0”, the first place of the day is detected. This can be omitted, and power consumption can also be reduced.

  As described above, according to the wristwatch 1 according to the present embodiment, the spring switches 300, 320, and 330 in which the switch terminals including the power supply terminals are arranged on the same circumference for the month detection, year detection, and 24:00 detection. By using, the spring contact and the power supply terminal are always in contact with each other, and the load torque is reduced as compared with a conventional spring switch in which the power supply terminal and other terminals are arranged in the circumferential direction. The power consumption can be reduced and the space for arranging the switch terminals including the power terminals can be saved. Therefore, the gears on which these spring switches are arranged may have a small diameter, and the spring switch can be arranged on any gear of the auto calendar mechanism, the degree of freedom of switch layout of the auto calendar mechanism is improved, and the auto calendar mechanism is small. Simplification and design.

  In addition, according to the present embodiment, a photo reflector is used for day detection using a gear having a large number of detection patterns and a small reduction ratio (low rotational torque) with respect to the piezoelectric rotor 72, and other calendar detection (month Detection, year detection), feed amount detection of the piezoelectric rotor 72, and detection at 24:00, by using a spring switch, durability, reduction of load torque and reduction of power consumption of the auto-calendar mechanism can be further improved. . In other words, if the spring switch is used for day detection with a large number of detection patterns, the number of times the spring switch is opened and closed increases, so there is a problem that the durability of the spring switch decreases in a short period of time. Since the rotational torque of the gear is small, the influence of the load torque by the spring switch becomes large, resulting in a problem that the power consumption of the piezoelectric actuator 71 increases. In this embodiment, the problem can be solved. it can.

  In addition, the use of a spring switch for calendar detection (month detection, year detection) reduces the number of times the spring switch is opened and closed, so that the generation of chips can be suppressed, and the watch movement mechanism E can be stopped or misaligned. Can be prevented. In addition, since the date mechanism drive part F is arrange | positioned facing the hand movement mechanism E via a base plate, it has the structure where the above-mentioned chip | tip does not easily penetrate into the hand movement mechanism E. In addition, since the number of times of opening and closing the spring switch is reduced, the allowable stress can be increased. Therefore, the spring switch and the spring contact can be made thin and small, and the calendar display mechanism can be made thin and small.

  Further, when the piezoelectric actuator 71 is driven to rotationally drive the piezoelectric rotor 72, the feed amount of the piezoelectric rotor 72 is detected by the spring switch 300 so that the driving of the piezoelectric actuator 71 is stopped. Compared with the case where the feed amount of 72 is detected using a photo reflector, not only can the power consumption be reduced, but also the current consumption when the driving of the piezoelectric actuator 71 and the feed amount detection of the piezoelectric rotor 72 are performed simultaneously. Can be reduced. Thereby, it is possible to almost certainly avoid the case where the current consumption of the wristwatch 1 exceeds the rated current of the secondary battery (the large capacity capacitor 48). In addition, since the spring switch 300 is provided in the intermediate wheel 75 of the reduction wheel train between the piezoelectric rotor 72 and the control wheel 78, the influence of the load torque of the spring switch 300 on the driving of the auto-calendar mechanism is hindered. Can be kept as low as possible.

  The above-described embodiment shows one aspect of the present invention, and can be arbitrarily changed within the scope of the present invention. For example, in the above-described embodiment, the case where the 10th place and the 1st place of the day are displayed using different date indicators has been described, but the date is displayed by providing numbers “1 to 31” for one date indicator. You may make it do. In this case, two photo reflectors are arranged on the substrate facing the back surface of the date indicator, and the displayed date is “1 to 28 days depending on the combination of detection results of each photo reflector on the back surface of the date indicator. ”,“ 29 days ”,“ 30 days ”, and“ 31 days ”may be provided with a light detection pattern. FIG. 17 is a diagram showing an example of the day information detection pattern in this case. In such a case, in the calendar feeding process, instead of the process of steps S7 and S9, it is determined whether or not “1 to 28 days” based on the detection results of the terminals PT1 and PT0. The calendar feed process may be terminated without performing year detection. As a result, when the displayed date is “1 to 28 days”, it is not necessary to perform year detection, and power consumption can be saved accordingly.

  In the above-described embodiment, the case where the photo reflector is used for date detection has been described. However, the photo reflector is not necessarily used for date detection. In short, detection with a large number of detection patterns or a gear with a small rotational torque is used. In either case of detection using the photo reflector, a photo reflector may be used, which is appropriately changed according to the configuration of the auto calendar mechanism. In the above embodiment, the date detection pattern is provided on the date dial, and this pattern is read by the photoreflector to detect the date. However, the date detection pattern is provided on the date dial, and the pattern is magnetized. The date may be detected by reading with a head or the like (magnetic reading means), and various non-contact detection means such as capacitance detection other than light detection and magnetic detection may be applied. In the case of magnetic detection, a plurality of hard magnetic film patterns are provided on a timepiece gear, and a Hall element is disposed on a substrate opposed to the hard gear pattern to detect magnetization information from the hard magnetic film pattern. A Hall element control current is passed through the Hall element through the bonding wire and the Hall element electromotive force is measured. The Hall element and the hard magnetic film pattern are not in contact with each other, thereby eliminating the influence on the hand movement. In particular, the GaAs Hall element is a non-packaged product and is very small, 300 μm × 300 μm × 150 μm thick, and can be easily inserted into the movement of the watch, and there is no need to change the thickness of the watch.

  Moreover, although the case where a spring switch is used as the mechanical switch has been illustrated in the above-described embodiment, other mechanical switches may be applied instead of the spring switch. Moreover, although the case where the spring contact of the spring switch has three feet has been described, there may be four or more, and there are two spring contacts of the spring switch for year detection and 24 hour detection. Also good. In the above-described embodiment, the case where the auto-calendar mechanism is driven by the piezoelectric actuator 71 is illustrated. However, instead of the piezoelectric actuator 71, the auto-calendar mechanism is replaced by using another driving unit such as an electromagnetic motor or an electrostatic motor. You may make it drive. In the above-described embodiment, the case where the present invention is applied to a timepiece having a date display window 204, a 24-hour display unit 205, a month display unit 206, and a year display unit 208 is illustrated. The present invention can also be applied to a clock that displays and a clock that displays the day of the week, and it is arbitrary which display unit is provided. In the embodiment of the present invention, the solar calendar is used. However, the solar calendar may be used.

  In the above-described embodiment, the power generation unit B is provided with the rotary weight 45 and the power generation unit B is illustrated as generating power from the turning (kinetic energy) of the rotary weight 45. The power generation may be performed using natural energy such as power generation. Moreover, although the structure which supplies electric power to each part of the wristwatch 1 by power generation was illustrated, this wristwatch 1 may be provided with a primary battery instead of power generation. Furthermore, in the above-described embodiment, the case where the present invention is applied to a wristwatch is illustrated, but the present invention can also be applied to a portable watch such as a pocket watch and a fixed watch such as a table clock. Moreover, it is applicable also to the radio timepiece which receives the electromagnetic wave (for example, JJY) which shows standard time, and corrects time, regardless of a portable type and a fixed type.

It is a figure which shows the external appearance structure of the wristwatch which concerns on one Embodiment of this invention. It is a figure which shows the auto calendar mechanism of a wristwatch. It is an enlarged view of an auto calendar mechanism. It is a figure for demonstrating the spring switch for a year detection and a month detection. It is a top view of the spring contact of a spring switch. It is a figure which shows arrangement | positioning of the switch terminal of a spring switch. It is a figure which shows the state of terminal CS0 and terminal CS1 displayed every month. It is a figure which shows an example of a month information detection pattern. It is a figure which shows arrangement | positioning of the switch terminal of the spring switch for a year detection. It is a figure which shows an example of a year information detection pattern. It is a figure which shows an example of a day information detection pattern. It is a figure for demonstrating the spring switch for the feed amount detection of a piezoelectric rotor. It is a figure which shows the electrical structure of a wristwatch with a mechanical structure, It is a block diagram which shows the function structure of a control part. It is a flowchart which shows a calendar sending process. It is a figure which shows the timing chart at the time of a 1 day feed process. It is a figure which shows an example of the day information detection pattern which concerns on a modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Wristwatch 10, 20 ... Stepping motor, 71 ... Piezoelectric actuator, 72 ... Piezoelectric rotor, 78 ... Control wheel, 89 ... 1st date wheel, 92 ... 10th date wheel, 96, 97, 98, 301 ... Spring contact, 96T, 98T, 98T1, 98T2, 302 ... conduction terminal, 204 ... month display window, 205 ... 24 hour display, 206 ... month display, 208 ... year display, 300, 310, 320, 330 ... Spring switch, A ... control unit, A1 ... clock control unit, A2 ... calendar control unit, B ... power generation unit, C ... power supply unit, D ... pointer drive unit, E ... hand movement mechanism, F ... date mechanism drive unit.

Claims (5)

The rotational position of the gear for the month detected that rotates in conjunction with the calendar display wheel for displaying the calendar, the calendar display function electronic timepiece performing calendar detected by detecting a mechanical switch,
The mechanical switch includes a spring contact that rotates integrally with the gear, and a power source that is disposed on the same circumference around the axis of the gear and contacts the spring contact according to the rotational position of the gear. A plurality of switch terminals including terminals,
The plurality of switch terminals are a power supply terminal, a first detection terminal for detecting continuity and detecting for February , and a second detection terminal for detecting continuity and detecting small moon except for February , and the spring The contact has a plurality of feet that contact the power supply terminal and the detection terminal according to the rotational position of the gear, respectively, and conduct between the terminals,
In the case of February, the power supply terminal and the first detection terminal are in contact with the foot, respectively, and in the case of a small moon except February, the power supply terminal and the second detection terminal are in contact with the foot, respectively. It is arranged so that it contacts, and in the case of a large moon , it is arranged so that the switch terminal and the foot of the spring contact do not contact,
An electronic timepiece with calendar display function.   The electronic timepiece with calendar display function according to claim 1, wherein the tips of the legs of the spring contacts are arranged on the same circumference.   3. The electronic timepiece with calendar display function according to claim 1, wherein the spring contact has a three-leg configuration including three of the foot portions.   The electronic timepiece with calendar display function according to claim 1, wherein the spring contact is formed in a symmetrical shape.   5. The electronic device with calendar display function according to claim 1, wherein the gear provided with the mechanical switch is a gear in a reduction wheel train of a calendar display mechanism that rotates the calendar display wheel. clock.

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