JP4770151B2 - Clock with calendar display function - Google Patents

Description

  The present invention relates to a timepiece with a calendar display function provided with a calendar display mechanism.

Conventionally, a timepiece having a calendar display mechanism for displaying a calendar is known. As an example of a calendar display mechanism, a calendar display vehicle such as a date wheel with numbers arranged on the circumference is provided, and by exposing a part of the calendar display vehicle from a calendar display window provided on the dial, (For example, Patent Document 1).
Moreover, in the electronic timepiece with calendar display function, there is a non-existence that does not actually exist at the end of a small month (February, April, June, September, November) in which the number of days in a month is less than 31 days. In order to prevent the presence date from being displayed in a residual manner, there is a device equipped with a month end correction function for avoiding such a residual indication. For example, this correction function includes an optical sensor on the back side of a calendar display vehicle, detects the calendar currently displayed in the calendar display window using the optical sensor, and the current month is the month with the largest month (31 A configuration is known that corrects the date display according to whether the month exists until the day) or a small month (for example, Patent Document 2).
JP-A-53-86254 JP 2003-255063 A

  By the way, since the calendar display window in the calendar display mechanism is configured to expose a part of the calendar wheel located behind the dial, there is a gap inside the calendar display window. When external light is inserted into the gap, the external light is reflected and diffracted and reaches the position of the photosensor disposed on the back side of the calendar display wheel, which may affect the detection operation of the photosensor. In particular, when strong external light hits the calendar display window, such as when exposed to direct sunlight in fine weather, the intensity of external light that enters through the gap and reaches the optical sensor cannot be ignored.

  Further, in recent years, it has become mainstream to provide features in design by using various calendar displays. When the calendar display is increased, the mechanical contact for detecting the position of the calendar is increased, the driving load is increased, and the reliability of electrical continuity due to wear of the mechanical contact may be reduced. . In this case, if a structure that performs non-contact detection using an optical position detection means (such as an optical sensor) is used, electrical signals can be stabilized and reliability can be ensured. For this reason, it has been desired to use an optical sensor as a method for detecting the displayed calendar.

  Accordingly, an object of the present invention is to eliminate the influence of external light inserted from the calendar display window in a timepiece with a calendar display function that detects the calendar displayed on the calendar display window using an optical sensor, and always operates stably. Another object is to provide a clock with a calendar display function.

In order to solve the above-described problems, the present invention provides a current time display unit that displays the current time, a calendar display mechanism having a plurality of calendar wheels located on the back side of the dial, A calendar display window for displaying a calendar by exposing a part of each calendar wheel, a detection unit for optically detecting a display state in the calendar display window on the back side of the dial, and an incident from the calendar display window And a light shielding member that shields at least a part of the external light reaching the detection unit.
In this case, the light blocking member may be configured to block a part of the external light that enters the gap between the calendar wheels exposed to the calendar display window and reaches the detection unit. The light blocking member may be configured to block light in a wavelength band that influences a detection operation by the detection unit, out of the external light that enters the calendar display window and reaches the detection unit. The light-shielding member is composed of a light-transmitting plate that covers the calendar display window, and a light-shielding layer that is formed on the light-transmitting plate and blocks light in a wavelength band that affects the detection operation by the detection unit. Also good.

  The plurality of calendar wheels may be arranged in such a manner that the surfaces of the calendar display windows are in the same plane. Alternatively, the plurality of calendar wheels may be arranged so that the surfaces of the calendar display windows have different height positions. Further, the plurality of calendar wheels may include a 10th date indicator displaying the 10th place of the date and a 1st date indicator displaying the 1st place of the date. Furthermore, the detection unit may include an optical sensor disposed at a position closer to the calendar display window than the rotation center of the calendar wheel.

  According to the present invention, it is possible to reduce the external light that enters from the calendar display window and reaches the detection unit, so that the influence of the external light on the optical detection operation in the detection unit can be eliminated, and the calendar display function Even in a harsh environment such as when the timepiece is exposed to strong external light, the detection unit can stably perform the detection operation.

  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, a wristwatch 1 (a timepiece with a calendar display function) includes a timepiece main body 1a and a belt 1b connected to the timepiece main body 1a. The watch body 1a includes a housing 200 and a disk-shaped dial plate 202 provided on the housing 200. On the upper surface of the dial plate 202, a second hand 61, a minute hand (long hand) 62, an hour hand (short hand) ) Three display pointers consisting of 63 are provided. On the dial 202, symbols indicating time are arranged at equal intervals along the circumference of the dial 202, and numbers or symbols indicated by each of the display hands (in the present embodiment, the symbols include characters). The current time is displayed.

  Further, the dial 202 is provided with a date display window 204 (calendar display window) that is hollowed out into a substantially rectangular shape. The date display window 204 is bordered by a window frame 209, and the light shielding member 210 is provided on the window frame 209. Is attached. Further, the dial 202 is provided with a 24-hour display unit 205, a month display unit 206, and a year display unit 208, respectively. 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, and the “day” of the calendar is displayed by the numbers attached to each date indicator.

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 main plate 303 (FIG. 4) having substantially the same shape as the dial plate 202 is disposed in the timepiece main body 1a, and the timepiece dial side (hereinafter referred to as the front side) is sandwiched between the main plates 303. An auto-calendar mechanism is arranged, and a basic mechanism as a watch is arranged on the back cover side (hereinafter referred to as 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 (the front side of the timepiece 1) of the base plate 303, and the drive source is a piezoelectric actuator 71. The piezoelectric actuator 71 is disposed in the vicinity of the crown 100 to be described later, and includes a piezoelectric element that is a vibrator. The vibration of the piezoelectric element strikes the outer peripheral portion of the piezoelectric rotor 72, and thereby the piezoelectric rotor 72. Rotate. 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 a meshes with the intermediate wheel pinion 74 a of the intermediate wheel 74, and a feed wheel 76 for rotating a control wheel 78 described later meshes with the intermediate wheel pinion 75 a.
The feed wheel 76 meshes with a control gear 77, and the control gear 77 is integrally formed with the control wheel 78 on the same axis. Here, the control gear 77 is constituted by a tooth profile of 31 divisions or a tooth profile of n times 31, and a monthly feed is performed once per revolution. Up to this point, the speed reducing wheel train is for turning the control wheel 78. Reference numeral 211 denotes a jumper used to generate a correction feeling (so-called click feeling).

  The intermediate wheel 75 is provided with a spring switch 300 for detecting the feed amount of the piezoelectric rotor 72 as shown in FIG. The spring switch 300 is a mechanical switch that is opened and closed according to the rotation of the intermediate wheel 75. The spring switch 300 is formed of an elastic metal material such as phosphor bronze or stainless steel, and is provided on a circuit board 303 a provided on a ground plate 303 and a spring contact 301 fixed to a support shaft of the intermediate wheel 75. And a conduction terminal portion 302 that conducts through a spring contact 301 that rotates together with the intermediate wheel 75. This conduction terminal portion 302 causes the spring contact 301 to be connected each 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. 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). This conduction terminal portion 302 is connected to a control portion A (FIG. 13), which will be described later, and the control portion A detects the switching amount of the spring switch 300 from the open state to the closed state to thereby feed the piezoelectric rotor 72. It is detected that has become the feed amount to send the calendar for one day. That is, the spring switch 300 functions as a rotor feed amount detection unit that detects the feed amount of the piezoelectric rotor 72.

FIG. 5 is a sectional view showing the control wheel 78, and FIG. 6 is an enlarged view thereof. As described above, the control wheel 78 is formed integrally with the control gear 77, and the control wheel 78 is arranged on the same axis with a substantially equal interval in the axial direction at the first to third claw wheels. 177 to 179 are integrally provided, and each of the claw wheels 177 to 179 includes a plurality of feeding claws 177a to 179a having different numbers in the circumferential direction.
In this configuration, the control gear 77 and the control wheel 78 are integrally formed. However, the present invention is not limited to this, and these may be configured as separate members.

  The feed claw 177a of the first claw wheel 177 is configured to be engageable with a date indicator driving wheel 87 (see FIG. 6), and rotates the first date wheel 89 (calendar wheel). The first claw wheel 177 and the date driving wheel 87 constitute a first tooth wheel train. Positioning after sending the first date wheel 89 (normal state) is performed by the tooth profile of the date indicator driving wheel 87 and the outer diameter of the first claw wheel 177. That is, it is configured to be able to rotate only from the date indicator driving wheel 87 side, and positioning of the 1st date indicator wheel is performed via this date indicator driving wheel 87. The feed claw 178a of the second claw wheel 178 is configured to be engageable with the date indicator driving wheel 90, and rotates the tenth date indicator (calendar wheel) 92. The second claw wheel 178 and the date driving wheel 90 constitute a second toothed wheel train. Positioning of the tenth date indicator 90 after feeding (in a normal state) is performed by the tooth profile of the date indicator driving wheel 90 and the outer diameter of the second claw wheel 178. That is, it is configured to be able to rotate only from the date indicator driving wheel 90 side, and positioning of the tenth date indicator is performed via the date indicator driving wheel 90. The feed claw 179a of the third claw wheel 179 is configured to be engageable with the month display intermediate wheel 79, and rotates the month display wheel 82. The third claw wheel 179 and the month display intermediate wheel 79 constitute a third tooth wheel train. Positioning of the month indicator wheel 82 after feeding (in a normal state) is performed by the tooth profile of the month indicator intermediate wheel 79 and the outer diameter of the third hook wheel 179. That is, it can be rotated only from the month display intermediate wheel 79 side, and positioning of the month display is performed via the month display intermediate wheel 79 and the month feed wheel 98.

  The month detection wheel 80 is engaged with a year display intermediate wheel 83, and the year display intermediate wheel 83 is engaged with a claw wheel 84a. The claw wheel 84a is formed integrally with the year feeding wheel 84. The year indicator wheel 85 meshes with the year feeding wheel 84, and the indicator wheel 208 a indicating the “year” of the calendar is connected to the year wheel 85. A claw portion is formed on the above-described claw wheel 84a, and the year wheel 85 is sent once in one rotation. That is, the year feeding wheel 84 is driven in conjunction with the driving (rotation) of the month display intermediate wheel 79, and this year feeding wheel 84 is once a year depending on the phase (state) of the pawl wheel 84a. It is rotated. In addition, in this structure, although it is a structure of 1 rotation in 4 years, this may be a feed of 4 times n. Positioning of the year indicating wheel 85 after feeding (in a normal state) is performed by the tooth profile of the year feeding wheel 84a and the outer diameter of the fourth claw wheel 84a. That is, it can be rotated only from the year feeding wheel 84a side, and the year display wheel is positioned by the year feeding wheel 84a. In this configuration, if the control wheel 78 or the feed wheel 77 does not rotate, the calendar display wheel does not rotate and its display position is determined.

  In this configuration, the calendar display mechanism employs a structure in which the control wheel 78 rotates a plurality of calendar display wheels via the first to third toothed wheel trains. However, it is possible to employ a structure that directly rotates the calendar display wheel. Further, in this configuration, the 1st date indicator 89 and the 10th date indicator 92 rotate substantially coaxially, and the date feeding claw rotates approximately coaxially.

The outer peripheral portion of the 1st date indicator 89 is formed in a flat plate shape to form a 1st date display plate portion 89a, and “0” to “9” corresponding to the 1st place of the date is formed on the surface thereof. Are displayed at equal intervals in the circumferential direction. Further, the outer peripheral portion of the 10th date indicator 92 is formed in a flat plate shape to become a 10th date indicator plate portion 92a, and on the surface thereof, there is an “empty area” corresponding to the 10th place of the date. Numbers “1” to “3” are displayed at equal intervals in the circumferential direction.
The “empty area” in the 10th day display board portion 92a is an area where no numerals are written, and the 10th place when the corresponding day corresponds to a single digit “day” (ie, 1st to 9th). Positioned on. 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. In this description, the “empty area” has been described, but this can also be represented by a “0” number.

In this configuration, by using the 1st date indicator 89 and the 10th date indicator 92, the 10th place and the 1st place of the date are respectively displayed. Therefore, the date is displayed using one date indicator. Compared with, the area for displaying the date is very large. That is, when displaying the date using one date wheel, 31 numbers “1” to “31” are arranged on the circumference of the date wheel. Only an area of about 11 ° can be allocated. On the other hand, in the first date display plate portion 89a, ten numbers “0” to “9” are arranged on the circumference, so an area of 36 ° is assigned to each number. Since the “empty area” and three numbers are displayed on the circumference of the center date display plate portion 92a, an area of 90 ° is assigned to each number and “empty area”.
In this way, the date display can be enlarged by displaying the date by the two date dials of the 1st place date wheel 89 and the 10th place date wheel 92. The design can be harmonized with the increase in size, and the difficulty of reading due to the small date display can be eliminated, thereby improving the visibility.

  Here, the 1st place date wheel 89 and the 10th place date wheel 92 are formed using, for example, Bs material (brass), and are designed to improve display properties and aesthetics by applying a mirror finish or the like. A material suitable for the application may be used, such as using an aluminum material with emphasis on making it easier. Further, by combining the materials used for the first date indicator 89 and the tenth date indicator 92, the display performance may be improved by making the display uniform, or the first date indicator 89 and the 10th date indicator. The car 92 may be made of a different material.

  As will be described later, in this configuration, the photo reflectors 105 to 108 are disposed on the back side of the first date wheel 89 and the tenth date wheel 92. In this case, it is desirable to use a material that does not transmit outside light (including visible light, infrared light, and ultraviolet light) for the first date wheel 89 and the 10th date wheel 92, and at least a photo reflector described later. It can be said that what does not transmit the wavelength band including the light which 105-108 irradiates and detects is desirable.

  However, in this configuration, by providing the light blocking member 210 as described later, it is possible to block outside light that enters from the date display window 204 and reaches the photo reflectors 105 to 108. Therefore, by appropriately adjusting the size and position of the light blocking member 210, it is possible to block external light that passes through the first date wheel 89 and the tenth date wheel 92 and reaches the photo reflectors 105 to 108. Become. In this case, since it is not necessary to block outside light by the first date wheel 89 and the tenth date wheel 92, restrictions on the materials of the first date wheel 89 and the tenth date wheel 92 are eliminated. Thereby, for example, the 1st date indicator 89 and the 10th date indicator 92 can be made of a synthetic resin to reduce the weight and improve the impact resistance, thereby improving the reliability. Since the first date wheel 89 and the 10th date wheel 92 are relatively large parts, these effects are very useful. In addition, by using a synthetic resin or the like having excellent processability as a material for the first date indicator 89 and the tenth date indicator 92, the surface of the first date indicator plate portion 89a and the tenth date indicator 92 is changed. Numbers can be formed by injection molding to form embossed characters and complex irregularities, and the degree of freedom in design can be greatly improved.

  As described above, the first date indicator 89 and the tenth date indicator 92 rotate substantially coaxially, and the first date indicator plate portion 89a and the tenth date indicator plate portion 92a are substantially the same. Concentric. The 1st place date display plate part 89a is larger in diameter than the 10th place date display plate part 92a and is located below (the back side) of the 10th place date display plate part 92a. Numbers “0” to “9” are displayed on the portion that protrudes from the outer shape of the portion 92a. Therefore, in the radial direction of the first date display plate portion 89a and the tenth date display plate portion 92a, the number or “empty area” of the tenth date display plate portion 92a and the first date display plate portion. The numbers 89a are lined up side by side.

  Further, the 1st place date display plate portion 89a is formed so that the position overlapping the 10th place date display plate portion 92a is concave, and the 10th place date display plate portion 92a is accommodated in this recess, so that the 1st place date display plate is displayed. The surface of the plate portion 89a and the surface of the tenth date display plate portion 92a are configured to be on the same plane.

  The date display window 204 provided on the dial 202 has a first date display plate portion 89a and a tenth date display plate portion 92a on the right side of the axis of the first date indicator 89 and the tenth date indicator 92. Open to span both. In the date display window 204, one of the numbers displayed on the surface of the first date display plate portion 89a is exposed on the right side, and one number displayed on the surface of the tenth date display plate portion 92a. Alternatively, the “empty area” is exposed on the left side, and a one-digit or two-digit number representing the date is displayed.

  When the control wheel 78 described above rotates, first, the date indicator driving wheel 87 and the first date pinion 88 rotate via the feed claw 177a of the first claw wheel 177, and the first date wheel 89 is integrally formed therewith. The numbers “0” to “9” displayed on the surface of the first date display plate portion 89a rotate and are sent in the circumferential direction once a day in principle. According to the rotation of the control wheel 78, the 1st date indicator 89 is rotated, and when the 10th place is reached, the date indicator driving wheel 178a of the second claw wheel 178 is now turned. The 90th and 10th place date kanas 91 rotate, and the 10th place date wheel 92 rotates together therewith. Then, the “empty area” or the numbers “1” to “3” on the surface of the 10th day display plate portion 92a is sent one in the circumferential direction once every 10 days. In response to the rotation of the control wheel 78, the rotation of the first date wheel 89 and the tenth date wheel 92 advances, and when the date on which the indication of “month” is advanced, this time, the third claw The month display intermediate wheel 79 and the month detection wheel 80 are rotated via the feed claws 179a of the wheel 179, 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. In this description, “JAN” (indicating January) to “DEC” (indicating December) has been described, but this is a number from “1” to “12” or a code representing a monthly unit in each language. Or may be represented by a symbol.

  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. The year wheel 85 is engaged with the year feeding wheel 84, and a display pointer 208a indicating the calendar year 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 present description, the leap year has been described as “0”, but this may be expressed by a symbol or a sign representing the leap year, such as “LYAP YEAR”.

  In the 24-hour display unit 205, the driving force is taken from a driving source of a hand movement mechanism E 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 linked to the hour wheel and is transferred once in 24 hours. The 24-hour wheel 95 is disposed in the vicinity of the crown 100 described later.

  The 24-hour detection wheel 94 is provided with a spring switch 310 that is substantially the same as the spring switch 300 provided in the intermediate wheel 75, and the spring switch 310 indicates that the display pointer 205a indicates “midnight”. Is detected. Specifically, the 24-hour detection wheel 94 is provided with a spring contact 97 (see FIG. 2), and the 24-hour detection wheel 94 is rotated at “midnight” on a circuit board facing the spring contact 97. A conduction terminal portion (not shown) that conducts through the spring contact 97 when the position is reached is provided. 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”.

Next, calendar detection (year detection, month detection, and day detection) will be described.
In the above configuration, the year detection wheel 86 is engaged with the intermediate wheel pinion 83a of the year display intermediate wheel 83, and the year detection wheel 86 is provided with a spring switch 320 substantially similar to the spring switch 300. Specifically, as shown in FIGS. 2 and 7, the year detection wheel 86 is provided with a spring contact 96, and on the circuit board opposed to the spring contact 96, the year detection wheel 86 corresponds to the rotation. In addition, a conduction terminal portion 96T that conducts through a spring contact 96 that rotates together with the year detection wheel 86 is provided. The conduction terminal portion 96T is formed to be conductive (closed state) or non-conductive (open state) depending on whether the displayed year is “leap year”, and is connected to a terminal CS2 of the control unit A described later. Yes. The control unit A detects whether the spring switch 320 is opened or closed (H level or L level) via the terminal CS2, so that the corresponding year is “leap year” or “non-year” based on the year information detection pattern shown in FIG. One of "leap year (normal year)" is detected. That is, the number of year information detection patterns is two.

  The month detection wheel 80 detects a spring switch 331 that detects whether or not the displayed month is a “large” month, and detects whether or not the displayed month is a “small” month except February. A spring switch 332 is provided. Specifically, as shown in FIGS. 2 and 7, a spring contact 98 is provided on the support shaft of the month detection wheel 80, and together with the month detection wheel 80 on a circuit board 303 a facing the spring contact 98. As the conduction terminal portion 98T that conducts via the rotating spring contact 98, the conduction terminal portion 98T1 that becomes conduction (closed state) or non-conduction (open state) when the displayed month is a “large” month, and display A conductive terminal portion 98T2 that is conductive (closed state) or non-conductive (open state) is formed when the month to be performed is a “small” month other than February. The conduction terminal portion 98T1 is connected to the terminal CS1 of the control unit A, and the conduction terminal portion 98T2 is connected to the terminal CS0 of the control unit A. The control unit A detects the combination of opening / closing (H level or L level) of the spring switches 331 and 332 via the terminals CS1 and CS0, and is displayed based on the month information detection pattern shown in FIG. The “month” is “February”, “small month” excluding February, or “large month”. That is, the number of detected patterns of month information is 3.

FIG. 8 is a diagram showing a date detection mechanism for detecting the date, and FIG. 9 is a cross-sectional view of the main part corresponding to FIG.
A light detection pattern provided with a reflective region and a non-reflective region is provided on the back surface of the first date display plate portion 89 a and the tenth date display plate portion 92 a, and a circuit board 303 a provided on the ground plate 303. A plurality of photo reflectors (reflection photo sensors) 105 to 108 for reading this pattern are provided on the top. Specifically, two photo reflectors 107 and 108 for irradiating light of a predetermined wavelength to different positions and receiving the reflected light are arranged on the circuit board 303a facing the 10th day display plate portion 92a. On the back surface of the 10th day display plate portion 92a, there is a light detection pattern that makes it possible to determine whether the displayed date is “00or10”, “20”, or “30” by each photo reflector. Provided. The photo reflector 107 is connected to PT2 of the control unit A, and the photo reflector 108 is connected to the terminal PT3 of the control unit A.

As described above, since the 1st date display plate portion 89a is located below the 10th date display plate portion 92a, the photo reflectors 107 and 108 on the circuit board 303a and the 10th date display plate portion There is a first date display plate portion 89a between 92a and 92a. Accordingly, it is difficult to detect the light detection pattern on the 10th day display plate portion 92a by irradiating light from the photo reflectors 107 and 108 as it is. Therefore, in this configuration, in the first date display plate portion 89a, a hole 89c is formed in a part of the concave portion overlapping the 10th date display plate portion 92a, so that the photo reflector 107, 108 makes it possible to detect the light detection pattern of the 10th day display plate portion 92a. This hole 89c is drilled at a position that matches the state of the light detection pattern of the 10th-placed date display plate 92a.
In this configuration, ten holes 89c are formed over the entire circumference of the first date display plate 89a in accordance with the display position of the first date display plate 89a (stop position of the first date indicator 89). The photo reflectors 107 and 108 are arranged at positions corresponding to the holes 89c. Accordingly, even if the stop positions of the 1st date indicator 89 (stopped every 36 ° rotation) and the 10th date indicator 92 (stopped every 90 ° rotation) are different, the 10th date display board The light detection pattern of the portion 92a can be reliably detected. Further, by providing the ten holes 89c, it is possible to secure a sufficient area necessary for light emission and detection of the photo reflectors 107 and 108.

  Here, by providing a sufficient number of holes 89c in the 1st date indicator 89, external light incident from the date display window 204 may easily reach the photo reflectors 105-108. However, in this configuration, it is possible to stably operate the photo reflectors 105 to 108 by disposing the light shielding member 210 as described later, thereby eliminating the influence of external light on the photo reflectors 105 to 108. It is.

Two photo reflectors 105 and 106 are also arranged on the circuit board 303a opposite to the first date display plate portion 89a, and the back surface of the first date display plate portion 89a is displayed by each photo reflector. The light detection pattern that makes it possible to discriminate between “2 to 8”, “9”, “0”, and “1” is provided. The photo reflector 105 is connected to the terminal PT0 of the control unit A, and the photo reflector 106 is connected to the terminal PT1.
The photo reflectors 105 to 108 constitute a detection unit.

  Here, the configuration of the light detection pattern will be described. A reflective material 89b is disposed on a part of the back surface of the first date display plate portion 89a, and a reflective material 92b is disposed on a part of the back surface of the tenth date display plate portion 92a. These reflectors 89b and 92b are formed by coating, printing, or pasting, and reflect light irradiated by the photo reflectors 105 to 108 with a high reflectance, and constitute a reflection region of the light detection pattern. . Further, on the back surface of the first date display plate portion 89a and the tenth date display plate portion 92a, the portion where the reflective material is not attached does not reflect the light irradiated by the photo reflectors 105 to 108, or The light is reflected with a low reflectivity and constitutes a non-reflective region of the light detection pattern. The positions of the reflectors 89b and 92b are appropriately determined according to the numbers on the surfaces of the first date display plate portion 89a and the tenth date display plate portion 92a and the position of the “empty region”.

  When the photo reflector irradiates the detection light, if the reflection area faces the photo reflector, strong reflected light exceeding a predetermined threshold is detected by the photo reflector. When the non-reflective region faces the photo reflector, the reflected light is not detected or weak reflected light below the threshold is detected. Therefore, the control part A discriminate | determines the day currently displayed on the date display window 204 by the 1st day display board part 89a and the 10th day display board part 92a based on the detection state in the photo reflectors 105-108. it can.

By the way, when the wristwatch 1 is exposed to external light, external light is incident on the date display window 204. Part of this incident light enters the gap between the 10th date display plate portion 92a and the 1st date display plate portion 89a, and wraps around due to reflection and diffraction. It reaches the positions of the photo reflectors 105 to 108 located on the back side. That is, the photoreflectors 105 to 108 are irradiated with external light such as direct light, reflected light, and diffracted light incident from the day display window 204.
In this case, the reflected light from the light detection pattern to be detected by the photo reflectors 105 to 108 is mixed with the outside light, and the light is detected when there is no (or weak) reflected light from the light detection pattern. For example, the detection operation of the photo reflectors 105 to 108 may be affected by outside light, and erroneous detection may occur. The gap between the first date display plate 89a and the tenth date display plate 92a is very small, but if the wristwatch 1 is exposed to strong external light such as direct sunlight in fine weather, The external light incident on the gap is so strong that it cannot be ignored.

If the date is displayed using one date wheel on which 31 numbers “1” to “31” are displayed, the size of the date wheel is larger than that of the date display window, the photo reflector, or the like. Because it is large, it is possible to dispose the photo reflector away from the date display window, and it is also possible to attach a shielding object to the photo reflector to block the external light, and the photo reflector is affected by the external light. Can not be.
On the other hand, the wristwatch 1 of the present configuration uses a first date wheel 89 that displays ten numbers and a tenth date wheel 92 that displays three numbers and “empty area”. The proportion of the surface exposed to the day display window 204 is large. For example, in the 10th place date wheel 92, a quarter of the surface of the 10th place date display plate portion 92 a is exposed to the date display window 204. For this reason, it is difficult to dispose the photo reflectors 105 to 108 far away from the date display window 204. For example, as shown in FIG. 8, the photo reflector 106 that detects the back surface of the first date wheel 89 is first. The photo reflector 108, which is located closer to the date display window 204 than the center of rotation of the date dial 89 and detects the back surface of the tenth date indicator 92, is closer to the date display window 204 than the center of rotation of the tenth date dial 92. It becomes the composition located in. When the photo reflector is located near the date display window 204 as described above, it is desirable to take measures so that external light incident from the date display window 204 does not affect the operation of the photo reflectors 105 to 108.

  Therefore, in this configuration, the light shielding member 210 is provided on the window frame 209 of the date display window 204. The light shielding member 210 is a substantially bar-shaped member disposed inside the date display window 204 so as to cover a gap between the first date display plate portion 89a and the tenth date display plate portion 92a. The light in the wavelength band is blocked by reflection or absorption. Here, the wavelength band of light blocked by the light blocking member 210 is a band including the wavelength of light irradiated and received by the photo reflectors 105 to 108. More specifically, the photo reflectors 105 to 108 have the highest sensitivity. This is a wavelength band including the wavelength received by the light. For example, when the photo reflectors 105 to 108 irradiate and detect infrared light, the light shielding member 210 blocks light in the infrared region centered on the wavelength at which the sensitivity of the photo reflectors 105 to 108 peaks. Things are used.

  For example, as indicated by an arrow in FIG. 9, the light shielding member 210 blocks external light incident on the gap between the first date display plate portion 89a and the tenth date display plate portion 92a. To the positions of the photo reflectors 105 to 108 is greatly reduced. In particular, since the band including the wavelength of the light irradiated and received by the photo reflectors 105 to 108 is blocked by the light blocking member 210, the influence of external light on the detection operation of the photo reflectors 105 to 108 is extremely small. The photo reflectors 105 to 108 can be stably operated even when exposed to strong external light.

  In addition, even if the outside light from the date display window 204 to the positions of the photo reflectors 105 to 108 cannot be completely blocked by the light blocking member 210, if the majority of the outside light can be blocked, External light can be suppressed to the extent permitted by the characteristics. For this reason, the photo reflectors 105-108 can be operated stably.

  Here, since the light blocking member 210 may be any member that reflects or absorbs light in a band including the wavelength of light irradiated and received by the photo reflectors 105 to 108, an opaque material that does not transmit visible light may be used. Alternatively, a colorless or colored transparent material may be used, or a material colored in an arbitrary color may be used. That is, since the light shielding member 210 does not need to block outside light over the entire wavelength band, the color, texture, and the like of the light shielding member 210 can be arbitrarily changed. For this reason, the light shielding member 210 can be made inconspicuous on the dial plate 202, or the light shielding member 210 can be colored in harmony with the design of the dial plate 202 and the window frame 209, so that the beauty of the wristwatch 1 is not impaired. The light shielding member 210 can be disposed on the surface.

  Then, as shown in the day information detection pattern in FIG. 12, the control unit A determines whether the displayed 10th “day” is “0or1” or “2” based on the light reception results of the photo reflectors 105 to 108. ”Or“ 3 ”and the displayed first“ day ”is the first day of the day (29, 30, 31) that does not exist in the small month“ 9 ” ”,“ 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”. .

  In this configuration, 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 relatively non-contact detection. By using a highly durable photo reflector and using a spring switch for other calendar detection, a calendar detection mechanism is provided that is excellent in durability, load torque reduction, and power consumption reduction.

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. The pointer driving unit D includes a second hand driving unit D1 that drives the second hand 61, and an hour / minute hand driving 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, respectively, and sampling p-channel MOSs 34a and 34b for supplying chopper pulses to the resistors 35a and 35b. I have. According to this, a control pulse having a different polarity and pulse width is applied from the control unit A to each gate electrode of each MOS 32a, 32b, 33a, 33b, 34a, and 34b at each timing, whereby the hand movement mechanism E Various drive pulses such as drive pulses having different polarities are supplied to the second hand moving mechanism E1 that constitutes a part of the second hand movement mechanism E1.

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

  The hand movement mechanism E includes a second hand movement mechanism E1 and an hour / minute hand movement mechanism 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 movement mechanism E2 is provided with a stepping motor 20. When the stepping motor 20 rotates the minute hand 62, the hour hand 63 and a display pointer for displaying the hour 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 around the rotor 23 according to the magnetic force generated by the drive coil 21. (Pole) The magnetic saturation part 24 is provided so that it may generate | occur | produce in 23A and 23B. Further, in order to define the rotation direction of the rotor 23, an inner notch 25 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, the third wheel 27, the second wheel 28, the minute wheel 29, the hour wheel 93a, the hour body 93, It is transmitted to each hand by a train wheel 30 comprising 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 the photo reflectors 105 to 108, and the spring switch 300 provided in the 24-hour detection wheel 94 is in a closed state. The calendar feeding process includes a one-day feeding process for rotationally driving the auto-calendar mechanism for one day, a calendar detection process for detecting whether the date is sent and determining whether it is a non-existing day, If it is determined that it is a non-existing day, a calendar correction process is performed in which 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. The calendar control unit A2 first sets the time to “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 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 photoreflector consumes a large amount of power when compared with the timepiece driving. Compared with the case where the feed amount of the rotor 72 is detected, 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 illustrated in FIG. 11, the calendar control unit A2 determines that “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 (terminal CS1 is at H level)), 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. 12, if the terminal PT3 is at the L level, the calendar control unit A2 is displayed because the 10th 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 avoid a 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. 12, the calendar control unit A2 determines that “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 the month 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 (ie, the day). The 10th place in the small and large months is always judged to be “1” or “0”, and if not, the other photo reflector is driven and the 1st place in the day Detection is performed. Therefore, when the first place of the day is “1” or “0”, it is not necessary to detect the 10th place of the day, and accordingly, power required for calendar detection is saved.

  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), the calendar control unit A2 determines that the terminal CS0 and the 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.

In the 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 mode is switched and power generation in the power generation unit B is detected, the hand movement mechanism E is driven at a high speed until the current time measured by the internal clock circuit is displayed, and the date is advanced by the number of days elapsed in the power saving mode. Therefore, it has a function of rotating the auto-calendar mechanism to return 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 is performed. 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 configuration, even when such a return operation is performed, the process of step S4 is performed, and the calendar correction process is defined taking this case into consideration.

  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 forward 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.

If 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 (normal rotation) (step S27). Then, the calendar control unit A2 rotates the auto-calendar mechanism for three days in the case of normal rotation to display “March 1” (step S28), and in the case of reverse rotation, displays the auto-calendar mechanism for one day. After rotating and displaying “February 28” (step S29), 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.
In this description, 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 may be 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 process of step S4 is performed. Well, 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 period of time, and to avoid operation restrictions during the recovery time.

In the present configuration described above, the front side refers to the side visually recognized on the wristwatch 1, and the back side refers to the side opposite to the front side.
Further, the wristwatch 1 includes a light shielding member 210, a casing 200 and a back cover (not shown) of the watch body 1a, a dial 202 (including a 24-hour display unit 205, a month display unit 206, and a year display unit 208). The exterior member protecting the internal mechanism (movement) of the watch body 1a is made of a light-shielding material such as metal and does not transmit light.

  According to the wristwatch 1 of this configuration, the light-shielding member 210 is disposed in the date display window 204 provided on the dial 202, and the first date display plate portion 89 a exposed to the date display window 204 and the tenth date display. By blocking at least a part of the external light incident from the gap between the plate portion 92a and reaching the photo reflectors 105 to 108 by the light shielding member 210, the external light irradiated to the photo reflectors 105 to 108 is greatly reduced. Let Thereby, the external light irradiated on the photo reflectors 105 to 108 falls within an allowable range in operation of the photo reflectors 105 to 108, and the influence of the external light on the detection operation of the photo reflectors 105 to 108 can be eliminated. Accordingly, the photo reflectors 105 to 108 can be stably operated even in a severe environment such as when the wristwatch 1 is exposed to strong external light.

  Further, according to the wristwatch 1 of this configuration, since the light shielding member 210 is disposed at a position covering the gap between the 1st place date display plate portion 89a and the 10th place date display plate portion 92a, the 1st place. There is an advantage that the boundary between the date display plate portion 89a and the 10th date display plate portion 92a is hidden by the light shielding member 210. The 1st place date display plate portion 89a and the 10th place date display plate portion 92a display the 1st place and the 10th place of the date, respectively, and are visually recognized as one piece. It is preferable. In the wristwatch 1 having this configuration, since this boundary is covered by the light shielding member 210, the appearance and beauty can be improved by making the color and texture of the light shielding member 210 match the design of each part of the wristwatch 1. it can.

  In particular, in the wristwatch 1, the surface of the first date display plate portion 89a and the surface of the tenth date display plate portion 92a are on the same plane, and the date displayed on the date display window 204 is displayed. It is designed to be visually recognized as a unit without any sense of incongruity. By providing the light shielding member 210, the boundary between the first date display plate portion 89a and the tenth date display plate portion 92a becomes less visible, so that the date displayed on the date display window 204 is more natural. There is an advantage that looks.

  Further, according to the wristwatch 1 of this configuration, the light blocking member 210 blocks light in a wavelength band including the wavelength of light irradiated and received by the photo reflectors 105 to 108, and thus the detection operation of the photo reflectors 105 to 108 is performed. The effect of external light on can be efficiently reduced. The light shielding member 210 may be any color as long as it shields light in the wavelength band. For example, when the light irradiated and received by the photo reflectors 105 to 108 is external light. It is also possible to make the light shielding member 210 transparent. As described above, according to this configuration, the light-shielding member 210 can be provided without increasing the degree of freedom in design and deteriorating the beauty of the wristwatch 1.

  Further, of the photo reflectors 105 to 108 corresponding to the 1st place date indicator plate portion 89a and the 10th place date indicator plate portion 92a, the photo reflectors 106 and 108 are the 1st place date indicator 89 and the 10th place date indicator. It is disposed closer to the date display window 204 than the center of rotation of 92, and may be affected by external light incident from the date display window 204. The reflectors 106 and 108 can be stably operated.

  Further, according to the wristwatch 1 of this configuration, by appropriately adjusting the size and position of the light shielding member 210, the first date indicator 89 and the tenth date indicator 92 are transmitted through the photo reflectors 105 to 108. It also becomes possible to block light. As a result, it is not necessary to block outside light by the 1st date indicator 89 and the 10th date indicator 92, so restrictions on materials of the 1st date indicator 89 and 10th date indicator 92 are eliminated, and weight reduction and In addition, it is possible to improve the reliability by improving the impact resistance, and it is possible to greatly improve the degree of freedom in design.

  The above-described embodiment shows one aspect of the present invention, and can be arbitrarily changed within the scope of the present invention. Accordingly, various modifications will be described below. Note that, in the following modified examples, the same components as those in the above embodiment are denoted by the same reference numerals in the drawings, and description thereof is omitted.

[Modification 1]
In the embodiment described above, the date display window 204 is outlined by the window frame 209. However, as shown in FIG. 17, when the window frame 209 is not provided in the date display window 204, the light shielding member 210 is attached. It is also possible to do. In this case, the light shielding member 210 may be directly attached to the opening of the date display window 204.
In the configuration shown in FIG. 17, at least a part of the external light incident on the gap between the first date display plate portion 89a and the tenth date display plate portion 92a can be blocked by the light blocking member 210. Since the detection operation by the photo reflectors 105 to 108 is not affected by external light, the same advantages as the configuration described in the above embodiment can be obtained.

[Modification 2]
In the above embodiment, the first date display plate portion 89a is provided with a recess at a position overlapping the 10th date display plate portion 92a, and the surface of the first date display plate portion 89a and the 10th date display plate portion 92a. However, it is also possible to adopt a configuration in which the concave portion is not provided in the first date display plate portion 89a. For example, as shown in FIG. 18, the first date display plate portion 89a is positioned below (back side) the 10th date display plate portion 92a, and the surface of the 10th date display plate portion 92a and the first position The surface of the date display plate portion 89a may be stepped.
In this case, the gap between the first date display plate portion 89a and the tenth date display plate portion 92a is larger than the configuration in which the above-described recess is provided, and it can be said that external light is easily incident. By providing the light blocking member 210 in the window 204, it is possible to block most of the outside light incident on the gap, and the detection operation by the photo reflectors 105 to 108 is not affected by the outside light. Similar effects can be obtained.

  Furthermore, according to the configuration of this modified example, the 1st place date display plate portion 89a and the 10th place date display plate portion 92a form a step, and the 1st place of the date displayed on the date display window 204 Although the boundary with the tenth position is easily noticeable, the provision of the light shielding member 210 has an advantage that the boundary is covered and the date on the date display window 204 is visually recognized without a sense of incongruity.

[Modification 3]
In the above-described embodiment, the first date wheel 89 and the tenth date wheel 92 rotate substantially coaxially, but the first date wheel 89 and the tenth date wheel 92 are arranged side by side. It can be configured.
For example, as shown in FIGS. 19 and 20, a 1st date indicator 189 arranged apart from the 10th date indicator 92 may be used instead of the 1st date indicator 89. The shape and structure of the 1st date indicator 189 is the same as that of the 1st date indicator 89, and the 1st date display plate portion 189a with numerals displayed on the surface and the back surface of the 1st date display plate portion 189a. And a reflecting material 189b which forms a pattern for light detection. Similarly to the date indicator driving wheel 87, the date indicator driving wheel 187 that engages the feed claw 177 a of the first claw wheel 177 is engaged with the first date indicator 189, The date indicator driving wheel 187 is rotated about an axis different from the tenth date indicator 92 by the rotation of the date indicator driving wheel 187. Further, photo reflectors 109 and 110 for detecting a light detection pattern are arranged on the circuit board 303a facing the back surface of the first date display plate portion 189a. The photo reflectors 109 and 110 are reflective photosensors that operate in the same manner as the photo reflectors 105 and 106, respectively, and are connected to the terminals PT0 and PT1 of the control unit A. The height position of the first date display plate portion 189a is adjusted to the height of the tenth date display plate portion 92a, and the surface of the first date display plate portion 189a and the surface of the tenth date display plate portion 92a Are configured to be coplanar.

  In the configuration shown in FIGS. 19 and 20, the 10th date indicator plate portion 92a of the 10th date wheel 92 and the 1st date indicator plate portion 189a of the first date wheel 189 are 10th. The date indicator window 204 is provided at the closest position on the straight line connecting the axis of the date dial 92 and the axis of the first date indicator 189. Accordingly, in the date display window 204, the number or “empty area” displayed on the 10th day display board portion 92a and the number displayed on the 1st day display board portion 189a are arranged to represent the day. One or two digits are displayed.

In the configuration shown in FIG. 19 and FIG. 20 also, it is conceivable that external light is incident on the gap between the first date display plate portion 189a and the tenth date display plate portion 92a. The detection operations of the photo reflectors 107 and 108 and the photo reflectors 109 and 110 may be affected by external light. Therefore, by attaching the light shielding member 210 to a position that covers the gap between the first date display plate portion 189a and the tenth date display plate portion 92a in the date display window 204, it is possible to reduce the amount of external light that enters the gap. It is possible to block all or part of the light with the light blocking member 210, and the detection operation by the photo reflectors 107, 108, 109, and 110 is not affected by external light, so the same effect as in the above embodiment can be obtained.
Further, in the configuration of this modified example, the surface of the first date display plate portion 189a and the surface of the tenth date display plate portion 92a are on the same plane, and the first digit of the date displayed on the date display window 204 is displayed. The date is not noticeable, and the date is visually recognized as a unit without any sense of incongruity. However, the date is more visually recognized by the shading member 210 obscuring the boundary. There is an advantage of becoming.

[Modification 4]
In the above embodiment, the light blocking member 210 is constituted by a substantially rod-shaped member that blocks part or all of the external light. However, as shown in FIG. 21, a transparent plate (translucent plate) covers the window frame 209. ) 212 and a light shielding layer 212 a that blocks part or all of the external light may be provided on the transparent plate 212. The transparent plate 212 is a transparent plate-like member that transmits light including visible light, and the light shielding layer 212a is a belt formed of a material that reflects or absorbs light of a specific wavelength band (for example, infrared light). It is an area. As a method of providing the light shielding layer 212a on the transparent plate 212, for example, the above material may be applied to a part of the transparent plate 212, or a film made of the above material may be attached to a part of the transparent plate 212. Good.

According to the configuration of this modified example, if the light shielding layer 212a is provided at a position covering the gap between the first date display plate portion 89a and the tenth date display plate portion 92a, the same effects as those of the above embodiment are provided. Is obtained.
Further, since the transparent plate 212 is configured to cover the window frame 209 (or the date display window 204), it is easier to attach to the date display window 204 than the light shielding member 210, and the workability in the assembly process of the wristwatch 1 is improved. It becomes possible to improve.

  Furthermore, it is also possible to provide the light shielding layer 212a on the entire surface of the transparent plate 212 described in the fourth modification. In this case, the entire transparent plate 212 reflects or absorbs the light in the wavelength band irradiated and detected by the photoreflector, thereby reflecting or absorbing all the light in the wavelength band in the external light incident on the day display window 204. However, it can be prevented from being inserted into the back side of the dial 202 at all. Further, since the presence of the light shielding layer 212a in the transparent plate 212 is hardly noticeable, the photo reflector can be stably operated without affecting the visibility of the date displayed on the date display window 204.

  In addition to the above modifications, 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. A date wheel is displayed adjacent to a calendar wheel displaying the day of the week or a calendar wheel displaying the month, and the date wheel and the calendar wheel are exposed side by side in the date display window. It is good also as a structure. In this case as well, there is a gap between the date wheel exposed in the date display window and the calendar wheel, and external light may enter into this gap, but by blocking the outside light by providing a light blocking member, The same effect as the above embodiment can be obtained.

Further, in the above-described embodiment, first, the currently displayed month is detected, and only when it is determined that this month is not a “large month” (“small month”), other calendar information (“day” ”Or“ Year ”) is described to determine whether or not the displayed date is an existing date. First, a day is detected, and this date is a date that does not exist in a small month. It may be determined whether or not “29th to 31st”, and the month may be detected only when this is the case.
For example, in the flowchart shown in FIG. 15, the process of step S5 may be performed after the process of step S9. Also in this case, when the currently displayed date is “1 to 28 days”, the month and year need not be detected, and the power consumption required for calendar detection can be saved accordingly.

  In the above-described embodiment, the case where the photo reflector is used only for the day detection using the gear having a large number of detection patterns and a small rotational torque has been described. For example, the photo reflector may be used for the moon detection. In either case of detection with a large number of detection patterns or detection using a gear with a small rotational torque, a photo reflector may be used, which is appropriately changed according to the configuration of the auto-calendar mechanism.

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. In the above embodiment, the auto-calendar mechanism is driven by the piezoelectric actuator 71. However, instead of the piezoelectric actuator 71, another electric actuator such as an electromagnetic motor or an electrostatic motor is used as a driving unit to auto-drive. The calendar mechanism may be driven. Furthermore, the calendar display mechanism of the present invention is not limited to the one using an electric actuator, and can be applied to one using a spring as a mechanical energy source as an actuator.
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. Thus, the present invention can be applied to a clock that displays only the day or a clock that displays the day of the week, and which display unit is provided is arbitrary. 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 the feed amount detection of a piezoelectric rotor. It is a figure for demonstrating a control vehicle. It is a figure which expands and shows a control vehicle. It is a figure for demonstrating the spring switch for a year detection and a month detection. It is a figure for demonstrating the day detection mechanism for a day detection. It is a figure for demonstrating the day detection mechanism for a day 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 month information detection pattern. It is a figure which shows an example of a day information detection pattern. 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 for demonstrating the date detection mechanism which concerns on the 1st modification of this invention. It is a figure for demonstrating the date detection mechanism which concerns on the 2nd modification of this invention. It is a figure for demonstrating the date detection mechanism which concerns on the 3rd modification of this invention. It is a figure for demonstrating the date detection mechanism which concerns on the 3rd modification of this invention. It is a figure for demonstrating the date detection mechanism which concerns on the 4th modification of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Wristwatch 10, 20 ... Stepping motor, 71 ... Piezoelectric actuator, 72 ... Piezoelectric rotor, 78 ... Control wheel, 82 ... Month wheel, 85 ... Year wheel, 89, 189 ... First place date wheel, 89a, 189a ... 1st place date display plate part, 92 ... 10th place date wheel, 92a ... 10th place day display plate part, 105-110 ... photo reflector, 177-179 ... claw wheel, 177a-179a ... feed claw, 204 ... day Display window 205 ... 24 hour display unit 206 ... Month display unit 208 ... Year display unit 209 ... Window frame 210 ... Light shielding member 212 ... Transparent plate 212a ... Light shielding layer 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 (7)

A current time display for displaying the current time;
A calendar display mechanism having a plurality of calendar cars located on the back side of the dial,
A calendar display window that is drilled in the dial and displays a calendar by exposing a portion of each of the calendar wheels;
A detection unit for optically detecting the display state in the calendar display window on the back side of the dial;
A light shielding member that blocks at least part of the external light that enters the gap between the calendar wheels exposed to the calendar display window and reaches the detection unit;
A clock with a calendar display function, characterized by comprising: Claim 1, wherein the light shielding member, among the outside light reaching the detector incident from the calendar display window, is characterized in that to block light affecting the wavelength band in the detection operation by the detection unit serial mounting calendar display function with a clock. The light shielding member is
A translucent plate covering the calendar display window;
A light shielding layer that is formed on the translucent plate and blocks light in a wavelength band that affects the detection operation by the detection unit;
Calendar display function equipped timepiece according to claim 1 or 2, characterized in that it is constituted by. The timepiece with calendar display function according to any one of claims 1 to 3 , wherein the plurality of calendar wheels are arranged in the calendar display window so that their surfaces are flush with each other. The timepiece with calendar display function according to any one of claims 1 to 3 , wherein the plurality of calendar wheels are arranged so that the surfaces of the calendar wheels are at different height positions in the calendar display window. It said plurality of calendar vehicles, any one of claims 1, characterized in that it comprises a first place date indicator for displaying one digit of 10 of the date wheel that displays the 10-position of the date and the date of 5 Clock with calendar display function described in 1. The calendar according to any one of claims 1 to 6 , wherein the detection unit includes an optical sensor disposed at a position closer to the calendar display window than the rotation center of the calendar wheel. Clock with display function.

Images