WO2024090100A1 - Horloge électronique - Google Patents

Horloge électronique Download PDF

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Publication number
WO2024090100A1
WO2024090100A1 PCT/JP2023/034951 JP2023034951W WO2024090100A1 WO 2024090100 A1 WO2024090100 A1 WO 2024090100A1 JP 2023034951 W JP2023034951 W JP 2023034951W WO 2024090100 A1 WO2024090100 A1 WO 2024090100A1
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WO
WIPO (PCT)
Prior art keywords
moon
lunar
board
age
current
Prior art date
Application number
PCT/JP2023/034951
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English (en)
Japanese (ja)
Inventor
大輔 原口
和貴 五十嵐
Original Assignee
シチズン時計株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by シチズン時計株式会社 filed Critical シチズン時計株式会社
Publication of WO2024090100A1 publication Critical patent/WO2024090100A1/fr

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    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/26—Clocks or watches with indicators for tides, for the phases of the moon, or the like
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means

Definitions

  • the present invention relates to an electronic watch.
  • Some watches have a time display section and a moon phase display section that displays the phases of the moon, i.e., the lunar phase, providing the user with a moon phase display corresponding to the age of the moon at the current date and time.
  • the moon phase display section has an opening for the moon phase plate formed in the dial, and a moon phase plate that displays the moon (full moon) and is driven to rotate, and the moon phase plate rotates in one direction relative to the opening for the moon phase plate to display the moon phase corresponding to the age of the moon.
  • the corresponding watch's moon phase display will also differ. Specifically, for the same date, time, and longitude (predetermined lunar age), the direction of change in the lunar phase display over time will differ. Therefore, the position and rotation direction of the lunar phase plate relative to the lunar phase plate opening will differ depending on whether the user who owns the watch is located in the northern or southern hemisphere.
  • the control circuit When the electronic watch switches between the northern hemisphere display mode and the southern hemisphere display mode of the lunar phase display section, the control circuit changes the rotation direction of the moon phase plate and rotates the moon phase plate to the post-movement rotational position.
  • the control circuit calculates the post-movement hemispheric lunar age based on the current date and time as in Patent Document 1 and rotates the moon age plate to a post-movement rotation position corresponding to the calculated post-movement hemispheric lunar age, the calculation of the post-movement hemispheric lunar age is complicated and the calculation load of the control circuit is high, so there is a problem that power consumption increases when high-load processing is performed every time the display mode is switched.
  • the present invention has been made in consideration of the above, and aims to propose an electronic watch that can reduce the computational load on the control circuit when switching the display mode of the moon phase display section.
  • the electronic timepiece in this embodiment includes a time display unit that displays the time based on an internal time, a moon phase display unit that has at least a moon phase plate supported so as to be freely rotatable and that displays the moon phase corresponding to the age of the moon as the moon phase plate rotates, a moon phase plate actuator that drives the moon phase plate to rotate, a control circuit that controls the moon phase plate rotation direction and the moon phase plate rotation position by the moon phase plate actuator, and a northern hemisphere display mode that displays the moon phase in at least the northern hemisphere and a southern hemisphere display mode that displays the moon phase in the southern hemisphere.
  • the control circuit determines that the operation for switching the display mode has been performed by the operation unit, the control circuit rotates the lunar phase plate from the current lunar phase plate rotation position to a post-switched lunar phase plate rotation position that is away from the reference lunar phase by the reference lunar phase difference on the opposite side to the current lunar phase plate rotation direction, when the lunar phase difference of the current lunar phase plate based on the current lunar phase plate rotation position relative to the reference lunar phase is set as the reference lunar phase difference, by using the lunar phase plate actuator to rotate the lunar phase plate from the current lunar phase plate rotation position to a post-switched lunar phase plate rotation position that is away from the reference lunar phase by the reference lunar phase difference on the opposite side to the current lunar phase plate rotation direction, and is characterized in that the control circuit determines the lunar phase plate rotation direction as the post-switched lunar phase plate rotation direction that is opposite to the current lunar phase plate rotation direction.
  • the electronic watch of the present invention has the advantage of being able to reduce the computational load on the control circuit when switching the display mode of the moon phase display section.
  • FIG. 1 is a diagram showing the overall configuration of an electronic timepiece according to an embodiment of the present invention.
  • FIG. 2 is an explanatory diagram of the operation of the moon phase display unit of the electronic timepiece in this embodiment (northern hemisphere display mode).
  • FIG. 3 is an explanatory diagram of the operation of the moon phase display unit of the electronic timepiece in this embodiment (southern hemisphere display mode).
  • FIG. 4 is a block diagram of the movement of the electronic timepiece according to the embodiment.
  • FIG. 5 is a diagram illustrating the operation of the function display section during the display mode switching operation.
  • FIG. 6 is a diagram illustrating the operation of the function display section during the display mode switching operation.
  • FIG. 5 is a diagram illustrating the operation of the function display section during the display mode switching operation.
  • FIG. 7 is a diagram illustrating an example of the operation of the moon phase display unit during the display mode switching operation.
  • FIG. 8 is a diagram illustrating an example of the operation of the moon phase display unit during the display mode switching operation.
  • FIG. 9 is a flow diagram of the display mode switching operation of the electronic timepiece according to this embodiment.
  • FIG. 10 is a diagram illustrating an example of the operation of the moon phase display unit during the display mode switching operation in the modified example.
  • FIG. 11 is a diagram illustrating an example of the operation of the moon phase display unit during the display mode switching operation in the modified example.
  • FIG. 1 is an overall configuration diagram of an electronic watch in an embodiment.
  • FIG. 2 is an explanatory diagram of the operation of the moon phase display unit of the electronic watch in an embodiment (northern hemisphere display mode).
  • FIG. 3 is an explanatory diagram of the operation of the moon phase display unit of the electronic watch in an embodiment (southern hemisphere display mode).
  • FIG. 4 is a block diagram of the movement of the electronic watch in an embodiment.
  • FIG. 5 is an explanatory diagram of the operation of the function display unit during a display mode switching operation.
  • FIG. 6 is an explanatory diagram of the operation of the function display unit during a display mode switching operation.
  • FIG. 5 is an explanatory diagram of the operation of the function display unit during a display mode switching operation.
  • FIG. 7 is a diagram showing an example of the operation of the moon phase display unit during a display mode switching operation.
  • FIG. 8 is a diagram showing an example of the operation of the moon phase display unit during a display mode switching operation.
  • the X direction in FIGS. 1 to 3 and FIGS. 5 to 8 (including FIGS. 10 and 11) is the 12 o'clock and 6 o'clock direction of the electronic watch
  • the Y direction is the 3 o'clock and 9 o'clock direction of the electronic watch
  • the direction perpendicular to the X direction and the Y direction is the up-down direction (thickness direction) of the electronic watch.
  • O1 is the center of the electronic watch 1 and coincides with the axis of rotation of the pointer.
  • a direction in the XY plane centered on O1 is called a radial direction.
  • the electronic watch 1 in this embodiment is an electronic watch that keeps internal time based on the output of a crystal oscillator and indicates the kept time with hands 31.
  • the electronic watch 1 may be a multi-function electronic watch that has functions other than timekeeping, such as an alarm function or a chronograph.
  • it may be a terminal device-linked watch that is connected to an external terminal device via a communication unit, either wirelessly or wired, and realizes specific functions (e.g., an alarm function, a time correction function based on the internal time information of the terminal device, a notification function that notifies when email is received, etc.) based on requests set in the terminal device.
  • electronic watch 1 comprises an exterior case 2, a time display unit 3, a moon phase display unit 4, a function display unit 5, an operation unit 6, and a movement 7.
  • electronic watch 1 has a time display unit 3 that is an analog electronic wristwatch with an analog display, and a moon phase display unit 4 that is a moon phase watch that displays the phases of the moon, i.e., the lunar phase.
  • time display unit 3 that is an analog electronic wristwatch with an analog display
  • moon phase display unit 4 that is a moon phase watch that displays the phases of the moon, i.e., the lunar phase.
  • electronic watch 1 is described as being of the wristwatch type, it may be of another watch type, for example, a pocket watch type, so long as it has the functionality of a moon phase watch.
  • the exterior case 2 constitutes the outermost part of the electronic watch 1 and is composed of a body 21, a bezel 22, a crystal 23, and a back cover (not shown).
  • the body 21 has an opening, and the time display section 3, moon phase display section 4, function display section 5, and movement 7 are held in the internal space S1, which corresponds to the space inside the opening.
  • the body 21 is annular, and the opening is circular with the center O1 of the electronic watch 1 as its center.
  • the shape of the opening can be any shape to match the external shape of the exterior case 2 of the electronic watch 1 and the design.
  • the body 21 has tip lugs 24 formed to protrude from the 12 o'clock and 6 o'clock directions on the outer peripheral side. One end of the belt 8 is connected to the tip lug 24 on the 12 o'clock side, and the other end of the belt 8 is connected to the tip lug 24 on the 6 o'clock side.
  • the windshield 23 covers the upper opening on one side of the opening of the body 21, and the back cover covers the lower opening on the other side. By fixing them together, the internal space S1 becomes a closed space, and the time display unit 3, the moon phase display unit 4, the function display unit 5, and the movement 7 can be protected.
  • a waterproof member such as a rubber packing (not shown) can be used to increase the retention force and improve the dustproofness and waterproofness of the electronic watch 1.
  • the body 21 is made of, for example, a resin material, a metal material, or a ceramic material.
  • the bezel 22 fixes the windshield 23 to the body 21, is formed in an annular shape, and is fixed to the annular portion of the body 21 that constitutes the internal space S1.
  • the bezel 22 is located radially outward from the time display unit 3.
  • the bezel 22 is made of, for example, a resin material, a metal material, or a ceramic material.
  • the bezel 22 may be supported on the case 21 so as to be rotatable about the watch center O1 of the electronic watch 1.
  • the crystal 23 is shaped to cover the upper opening via the bezel 22, and is inserted from the upper side and fixed to the bezel 22, and is fixed to the case 21 via the bezel 22 to close the internal space S1.
  • the crystal 23 has a circular outer shape in a plan view.
  • the crystal 23 is made of, for example, glass or a transparent resin material.
  • the back cover has an engagement portion of approximately the same shape as the downward opening, and is inserted from the lower side and fixed to the case 21 to close the internal space S1.
  • the back cover has a circular outer shape.
  • the back cover is made of, for example, a resin material, a metal material, or a ceramic material, like the case 21.
  • the bezel 22 may be formed integrally with the case 21 as long as it does not rotate.
  • the time display unit 3 displays the time based on the internal time.
  • the time display unit 3 has hands 31, a dial 32, a dial cover 33, and a date dial 34.
  • the time display unit 3 displays the internal time (at least date information, hour information, minute information, and second information) kept by the control circuit 72 of the movement 7 (described later), i.e., displays the time.
  • the hands 31 are supported by the movement 7 so as to be rotatable around the clock center O1 of the electronic clock 1 as the axis of rotation, and are driven to rotate by the movement 7.
  • the hands 31 are rod-shaped and made of a metal material, a resin material, or the like.
  • the hands 31 are a second hand 31a, a minute hand 31b, and an hour hand 31c, and are positioned above the dial 32 (towards the crystal 23).
  • the hands 31 also rotate when the user operates the operating unit 6.
  • the hands 31 can display the time based on the internal time depending on the position they are pointing to.
  • the dial 32 is disposed between the hands 31 and the movement 7, and protects the movement 7.
  • the dial 32 has the function of providing the user with an aesthetic look of the electronic timepiece 1.
  • Hour characters 321, 322 are provided on the surface of the dial 32 (the side facing the crystal 23). In other words, the hour characters 321, 322 are disposed to face the crystal 23 in the vertical direction, and can be seen by the user through the crystal 23.
  • the user can recognize the current time based on the time display from the relative positions of the hands 31 (second hand 31a, minute hand 31b, and hour hand 31c) and the hour characters 321, 322.
  • the dial 32 is formed with a date plate opening 323 that allows the user to see the date plate 34 through the crystal 23.
  • the date plate opening 323 is formed in a position facing the date plate 34 in the vertical direction of the dial 32, and penetrates the dial 32 from top to bottom.
  • the date plate opening 323 is rectangular and is formed at the "4 o'clock" position on the dial 32.
  • the face ring 33 is positioned radially outward from the dial 32.
  • the face ring 33 is formed in an annular shape and is positioned radially outward from the tip of the hand 31.
  • the time display unit 3 can display information such as setting information corresponding to functions other than the time display function.
  • Information displays include ON/OFF settings for the alarm function, the set time for the alarm, chronograph display, time zone display, display related to reception operation, and daylight saving time setting display.
  • the dial 32 and face ring 33 are provided with function marks (not shown), and the setting information for each function based on the information display can be recognized based on the relative positions of the hands 31 (second hand 31a, minute hand 31b, hour hand 31c) and the function marks.
  • the date dial 34 rotates to display the date.
  • the date dial 34 When viewed from the top-bottom direction, the date dial 34 is formed in a circular shape, and is disposed between the dial 32 and the movement 7 in the top-bottom direction.
  • the date dial 34 is supported by the movement 7 so as to be freely rotatable, with the watch center O1 as the axis of rotation, and is driven to rotate by the movement 7.
  • the date dial 34 has multiple day marks 341 formed on it.
  • the day marks 341 are visible to the user through the date dial opening 323 and the crystal 23, and display the current date based on the internal time.
  • the day marks 341 are the numbers "1" to "31" corresponding to the days, and are formed clockwise in an area of one revolution of the date dial 34 in the circumferential direction.
  • the lunar phase display unit 4 displays the lunar phase corresponding to the age of the moon by rotating the lunar phase plate 42.
  • the lunar phase display unit 4 has an opening 41 for the lunar phase plate, the lunar phase plate 42, and lunar phase plate rotation direction marks 43, 44.
  • the opening 41 for the moon phase plate allows the user to view the moon phase plate 42 through the windshield 23.
  • the opening 41 for the moon phase plate is formed in the dial 32.
  • the opening 41 for the moon phase plate faces the moon phase plate 42 in the vertical direction, and is formed in an approximately fan-shaped shape at the 12 o'clock direction in the area where the dial 32 faces the moon phase plate 42.
  • the opening 41 for the moon phase plate has recesses 411, 412 formed at both ends in the moon phase plate rotation direction R.
  • the recesses 411, 412 indicate the phases of the moon when they overlap in the vertical direction with the moon marks 421, 422 on the moon phase plate 42, which will be described later.
  • the moon phase plate rotation direction R is a direction around the moon phase plate center O2 of the moon phase plate 42, and has two rotation directions: the current moon phase plate rotation direction RR and the switched moon phase plate rotation direction RC, which is opposite to the current moon phase plate rotation direction RR.
  • the opening 41 for the moon phase board (including the recesses 411 and 412) is shown with dotted lines to make it easier to understand the operation of the illustrated month marks 421 and 422.
  • the moon phase plate 42 rotates to display the phase of the moon corresponding to the age of the moon.
  • the moon phase plate 42 is formed in a circular shape when viewed from the top-bottom direction, and is arranged between the dial 32 and the movement 7 in the top-bottom direction.
  • the moon phase plate 42 is supported by the movement 7 so as to be freely rotatable, with the moon phase plate center O2 of the moon phase plate 42 as the rotation axis, and is rotated by the movement 7.
  • clockwise rotation of the moon phase plate 42 is forward rotation
  • counterclockwise rotation is reverse rotation, with the clockwise direction being the forward direction RY and the counterclockwise direction being the reverse direction RN.
  • the moon phase display unit 4 in this embodiment displays the moon phase corresponding to the moon age for two synodic cycles per rotation.
  • the moon marks 421, 422 in this embodiment are identical (same shape, color, etc.), and the user cannot distinguish between the moon marks 421, 422 even if he or she visually recognizes them.
  • the forward rotation direction RY of the moon phase board 42 becomes the current moon phase board rotation direction RR.
  • the lunar-age board rotation direction RR is the forward rotation direction RY
  • the reverse direction RN of the moon phase plate 42 becomes the current moon phase plate rotation direction RR.
  • the current rotation direction RR of the lunar phase plate is the reverse direction RN, as shown in FIG.
  • the moon phase plate rotation direction marks 43, 44 indicate the moon phase plate rotation direction R in each display mode D.
  • the moon phase plate rotation direction marks 43, 44 are provided on the surface of the dial 32.
  • the moon phase plate rotation direction mark 43 corresponds to the northern hemisphere display mode DN, and is composed of a clockwise arrow and the abbreviated English letter "N" corresponding to north.
  • the moon phase plate rotation direction mark 44 corresponds to the southern hemisphere display mode DS, and is composed of a counterclockwise arrow and the abbreviated English letter "S" corresponding to south.
  • the function display unit 5 displays the state of the electronic watch 1 based on a function different from the time display function of the electronic watch 1, i.e., displays the function.
  • the function display unit 5 has a function hand 51 and a function mark plate 52.
  • the function display unit 5 displays the current day of the week based on the internal time kept by the control circuit 72, i.e., displays the day of the week, displays the remaining charge of the secondary battery 76 measured by the control circuit 72, i.e., displays the remaining charge, and displays the display mode D of the moon phase display unit 4, which is either the northern hemisphere display mode DN or the southern hemisphere display mode DS stored in the control circuit 72, i.e., displays the display mode.
  • the function hand 51 is supported by the movement 7 so as to be rotatable around the center O3 of the function mark plate 52 as the axis of rotation, and is driven to rotate by the movement 7.
  • the function hand 51 is rod-shaped and made of a metal or resin material.
  • the function hand 51 is positioned above the function mark plate 52 (towards the windshield 23).
  • the function hand 51 rotates when the user operates the operating unit 6, that is, it indicates one of the above function displays.
  • the function hand 51 can display a function corresponding to each function depending on the position it is pointing to.
  • the function mark plate 52 is disposed between the function hand 51 and the movement 7.
  • the function mark plate 52 is formed as a part of the dial 32.
  • the function marks 521 to 524 are disposed so as to face the crystal 23 in the vertical direction, and can be seen by the user through the crystal 23. The user can recognize the state of the electronic watch 1 based on the function display from the relative positions of the function hand 51 and the function marks 521 to 524.
  • the day of the week mark 521 displays the current day of the week based on the position of the function hand 51.
  • the day of the week marks 521 in this embodiment are the abbreviated English letters "S", “M”, “T”, “W”, “T”, “F”, and "S” corresponding to each day of the week (Sunday to Saturday), and are formed clockwise in the area of the function mark plate 52 from the 2 o'clock direction to the 5 o'clock direction.
  • the remaining amount mark 522 indicates the remaining amount of the secondary battery 76 based on the position of the function hand 51.
  • the remaining amount mark 522 in this embodiment is a first remaining amount figure corresponding to the remaining amount, a second remaining amount figure narrower in the radial direction than the first remaining amount figure, a third remaining amount figure narrower in the radial direction than the second remaining amount figure, and a fourth remaining amount figure narrower in the radial direction than the third remaining amount figure, and are formed in a counterclockwise direction in the area from the 10 o'clock direction to the 6 o'clock direction on the function mark plate 52.
  • the display mode marks 523 and 524 correspond to the display mode D, and indicate the current display mode DR based on the position of the function hand 51.
  • the northern hemisphere display mode mark 523 in this embodiment is the abbreviated English letter "N” corresponding to north, and is formed in the area of the function mark plate 52 at the 1 o'clock direction.
  • the southern hemisphere display mode mark 524 in this embodiment is the abbreviated English letter "S” corresponding to south, and is formed in the area of the function mark plate 52 at the 11 o'clock direction.
  • the function mark plate 52 is formed as part of the dial 32, it is not limited to this and may be made of a plate material different from the dial 32. In this case, an opening for the function mark plate (not shown) is formed in the dial 32, and the function mark plate 52 is positioned between the dial 32 and the movement 7 in the vertical direction.
  • the operation unit 6 is operated by the user to realize a functional operation based on the operation for the movement 7.
  • the operation unit 6 switches the display mode D of the moon phase display unit 4 from either the northern hemisphere display mode DN or the southern hemisphere display mode DS in the control circuit 72 to the other, that is, performs a display mode switching operation.
  • the electronic watch 1 switches the display mode D by the user's operation of the operation unit 6, that is, the display mode switching operation, changes the rotation position of the moon phase plate 42 of the moon phase display unit 4, in this embodiment the step position, sets the subsequent moon phase plate rotation direction R to a post-switch moon phase plate rotation direction RC, which is the opposite direction from the current moon phase plate rotation direction RR, and performs a display mode switching operation in which the function hand 51 of the function display unit 5 points to the display mode marks 523, 524 corresponding to the switched display mode D.
  • the operation unit 6 has a crown 61, a push button 62, and a push button 63.
  • the crown 61 is formed to protrude from the side of the body 21, and can be pulled out one or more steps in the protruding direction by the user's operation, and can rotate around the axis.
  • the crown 61 can be rotated in a step other than the 0th step, for example, the 2nd step, which is not pulled out in the protruding direction, to forcibly rotate the hands 31 in the time display state, and the time display can be corrected.
  • the push buttons 62, 63 are formed to protrude from the side of the body 21, and can be pressed in the opposite direction to the protruding direction by the user's operation. The push buttons 62, 63 maintain their protruding state in the protruding direction when no external force is acting.
  • the operation unit 6 is connected to the control circuit 72 of the movement 7, and outputs the operation state by the user as an operation signal to the control circuit 72.
  • the movement 7 includes an antenna 71, a control circuit 72, an actuator 73, a gear train mechanism 74, a power generation mechanism 75, and a secondary battery 76, and performs the timekeeping function and other functional operations of the electronic watch 1.
  • the antenna 71 receives standard radio waves.
  • the electronic watch 1 is also a radio-controlled watch.
  • the antenna 71 is electrically connected to the control circuit 72, and the standard radio wave signal is output to the control circuit 72.
  • the antenna 71 may also receive a GPS (GLOBAL POSITIONING SYSTEM) signal output by a satellite.
  • GPS GLOBAL POSITIONING SYSTEM
  • the control circuit 72 controls the rotational position and direction of the hands 31, date plate 34, moon plate 42, and function hand 51.
  • the control circuit 72 is a circuit that controls the electronic watch 1, and based on a clock signal output from an oscillator (not shown), it measures the internal time of the electronic watch 1 and outputs control signals according to each function.
  • the control circuit 72 has a receiving IC 721 and a control IC 722 including a CPU (Central Processing Unit) and a memory unit such as a RAM (Random Access Memory) and a ROM (Read Only Memory).
  • the receiving IC 721 processes the standard radio wave received by the antenna 71, and outputs time information (including date information, hour information, minute information, and second information) based on the standard radio wave to the control IC 722.
  • the control IC 722 outputs a control signal to the actuator 73 to make the hands 31 display the time based on the internal time being measured.
  • the control IC 722 also corrects the internal time based on the time information output from the receiving IC 721.
  • the oscillator is a source of oscillation for generating a reference frequency for counting the displayed time of the electronic clock 1 and other functional operations, and may be, for example, a quartz crystal oscillator. Since the oscillation characteristics of a quartz crystal oscillator are prone to change depending on the external temperature, a temperature compensated quartz crystal oscillator (TCXO) may also be used.
  • the control circuit 72 also controls the moon phase board rotation direction R, which is the direction of rotation of the moon phase board 42, and the moon phase board rotation position, which is the rotation position of the moon phase board 42, using the third actuator 73c, which is an actuator for the moon phase board and will be described later, based on the current display mode DR, which is either the northern hemisphere display mode DN or the southern hemisphere display mode DS.
  • the northern hemisphere display mode DN is a mode that controls the moon phase display unit 4 to display the moon phase corresponding to the moon age for the northern hemisphere, and drives the moon phase board 42 to rotate in one of the moon phase board rotation directions R, which in this embodiment is the forward direction RY.
  • the southern hemisphere display mode DS is a mode that controls the moon phase display unit 4 to display the moon phase corresponding to the moon age for the southern hemisphere, and drives the moon phase board 42 to rotate in the other of the moon phase board rotation directions R, which in this embodiment is the reverse direction RN.
  • the lunar age for the northern hemisphere and the lunar age for the southern hemisphere at the same date, time and longitude are the same, but the lunar phase display corresponding to the lunar phase for the northern hemisphere and the lunar phase display corresponding to the lunar phase for the southern hemisphere are different.
  • the control circuit 72 rotates the lunar age board 42 in steps, so the lunar age board rotation position is the lunar age board step position S.
  • the lunar age board 42 rotates once by being driven to rotate in steps multiple times by the third actuator 73c.
  • the lunar age board 42 rotates once in 60 steps, and displays the lunar phase corresponding to the lunar age for two synodic cycles, so one synodic cycle is 30 steps.
  • the step position in the 12 o'clock direction of the lunar phase plate 42 is the current lunar phase plate step position SR
  • the control circuit 72 rotates the moon phase board 42 one step using the third actuator 73c, i.e., one step per day, with one step being the amount by which the moon phase board 42 moves per day.
  • the control circuit 72 rotates the moon phase board 42 two steps using the third actuator 73c once every 59 days, instead of one step per day.
  • the control circuit 72 determines whether a mode switching operation, which is a switching operation of the display mode D, has been performed by the operating unit 6. In this embodiment, the control circuit 72 determines whether a mode switching operation has been performed by determining whether the push button 63 has been pressed when the crown 61 is in the first stage position. When the crown 61 is in the first stage position, the control circuit 72 rotates the function hand 51 by the fourth actuator 73d to a position radially opposite the display mode marks 523, 524 corresponding to the current display mode DR.
  • the control circuit 72 drives the function hand 51 to rotate in a stepwise manner to a position radially opposite the northern hemisphere display mode mark 523, as shown in FIG. 5.
  • the control circuit 72 changes the current display mode DR to the switched display mode DC.
  • the post-switching display mode DC becomes the southern hemisphere display mode DS, so the control circuit 72 drives the function hand 51 to rotate in a stepwise manner to a position facing the southern hemisphere display mode mark 524 in the radial direction, as shown in FIG. 6.
  • the control circuit 72 drives the age board 42 to rotate in steps by the third actuator 73c from the reference age MB to a post-switching age board step position SC corresponding to a post-switching age board rotation position corresponding to a post-switching age MC that is away from the reference age MB on the opposite side to the current age MR by the reference age difference MD, where the reference age difference MD is the age difference of the current age MR based on the current age board step position SR corresponding to the current age board rotation position relative to the reference age MB.
  • the control circuit 72 sets the age board rotation direction R to a post-switching age board rotation direction RC that is opposite to the current age board rotation direction RR.
  • the reference age MB corresponds to the lunar phase display of the full moon, and is the center of one synodic cycle, i.e., half the number of lunar ages in one synodic cycle.
  • the reference age MB refers to the reference age corresponding to the synodic cycle at the current lunar age MR when the lunar phase display unit 4 displays the lunar phases corresponding to the lunar ages for two synodic cycle periods with one rotation of the lunar age board 42.
  • ), which is the age difference between the reference age MB and the current lunar age MR, becomes 9 (MD 9).
  • the post-switching lunar age MC can be calculated by MA-MR, where MA is the number of lunar ages in one synodic cycle.
  • the lunar age board 42 in this embodiment has the post-switching lunar age board step positions SC corresponding to the post-switching lunar age MC, the number of which is the number of synodic cycles, i.e., two. This is because the lunar age board 42 can display the lunar phases for two synodic cycles.
  • first post-switching lunar age board step position SC1 which is a post-switching lunar age board step position SC in the current lunar age board rotation direction RR with respect to the current lunar age board step position SR
  • second post-switching lunar age board step position SC2 which is a post-switching lunar age board step position SC in the post-switching lunar age board rotation direction RC with respect to the current lunar age board step position SR.
  • the first post-switching lunar age board step position SC1 can be calculated by SA1-SR, where SA1 is the number of steps of the lunar age board 42 that corresponds to the number of lunar ages in one synodic cycle.
  • the second post-switching lunar age board step position SC2 can be calculated by SA2-SR, where SA2 is the number of steps of the lunar age board 42 that corresponds to the number of lunar ages in two synodic cycles.
  • SA2 is the number of steps of the lunar age board 42 that corresponds to the number of lunar ages in two synodic cycles.
  • the current direction step difference SDR between the current lunar age board step position SR and the first post-switching lunar age board step position SC1 when rotated in the current lunar age board rotation direction RR is 18, and the post-switching direction step difference SDC between the current lunar age board step position SR and the second post-switching lunar age board step position SC2 when rotated in the post-switching lunar age board rotation direction RC is 12, so that the post-switching direction step difference SDC is less than the current direction step difference SDR in the step rotation drive of the lunar age board 42.
  • the control circuit 72 rotates the age board 42 in the current age board rotation direction RR in a step-rotating manner from the current age board step position SR corresponding to the current age board rotation position to the switched age board step position SC corresponding to the switched age board rotation position when the current direction step difference SDR, which is the rotation angle of the age board 42 when rotated in the current age board rotation direction RR from the current age board step position SR corresponding to the current age board rotation position to the switched age board step position SC corresponding to the switched age board rotation position, is less than a predetermined number of steps SDT corresponding to the predetermined rotation angle, and rotates the age board 42 in the current age board rotation direction RR in a step-rotating manner from the current age board step position SR to the switched age board step position SC when the current direction step difference SDR is equal to or greater than the predetermined number of steps SDT.
  • the predetermined number of steps SDT corresponding to the predetermined rotation angle is set based on at least one of the difference (
  • the difference
  • the predetermined number of steps SDT is set based on both the difference (
  • the power consumption of the electronic watch 1 is smaller when the number of steps is smaller.
  • the power consumption of the electronic watch 1 may be greater when the moon board 42 is rotated one step in the post-switch moon board rotation direction RC than when the moon board 42 is rotated one step in the current moon board rotation direction RR.
  • the predetermined number of steps SDT is set based on both the difference between the current direction step difference SDR and the post-switch step difference SDC (
  • the actuator 73 drives and rotates the hands 31, the date plate 34, the moon plate 42 and the function hand 51.
  • the actuator 73 includes a drive circuit and a drive section, and receives a control signal from the control circuit 72 to the drive circuit, which outputs a drive signal based on the input control signal to the drive section, which then drives the drive section based on the input drive signal.
  • the actuator 73 in this embodiment is a motor capable of step rotation drive such as a stepping motor or an electric motor, and is composed of a first actuator 73a that drives and rotates the second hand 31a, a second actuator 73b that drives and rotates the minute hand 31b and the hour hand 31c, a third actuator 73c that is an actuator for the moon plate and drives and rotates the moon plate 42, and a fourth actuator 73d that drives and rotates the function hand 51 and the date plate 34.
  • a motor capable of step rotation drive such as a stepping motor or an electric motor
  • the train wheel mechanism 74 transmits the driving force output by the actuator 73 to the hands 31, the date dial 34, the moon phase plate 42, and the function hand 51.
  • the train wheel mechanism 74 includes train wheel gears and the like, one end of which is connected to the actuator 73, and the other end of which is connected to the hands 31, the date dial 34, the moon phase plate 42, and the function hand 51.
  • the train wheel mechanism 74 is composed of a first train wheel mechanism 74a that connects the first actuator 73 to the second hand 31a, a second train wheel mechanism 74b that connects the second actuator 73b to the minute hand 31b and the hour hand 31c, a third train wheel mechanism 74c that connects the third actuator 73c to the moon phase plate 42, and a fourth train wheel mechanism 74d that connects the fourth actuator 73c to the function hand 51 and the date dial 34.
  • the power generation mechanism 75 generates electricity using external energy and supplies the generated electricity to electronic components such as the secondary battery 76 and the control circuit 72.
  • the power generation mechanism 75 can use a photoelectric conversion element that converts light energy, a thermoelectric conversion element that converts thermal energy, or a mechanoelectric conversion element that generates electricity from mechanical motion such as vibration energy.
  • the secondary battery 76 can store the power generated by the power generation mechanism 75 and is a power source that supplies power to the control circuit 72, the actuator 73, and other electronic components.
  • a lithium ion battery or an all-solid-state battery can be used as the secondary battery 76.
  • FIG. 9 is a flow diagram of the display mode switching operation of the electronic watch in this embodiment. Note that the display mode switching operation of the electronic watch 1 in this embodiment will be described including the step rotation drive operation of the moon phase board 42.
  • the control circuit 72 determines whether or not the crown 61 is in the first position (step ST1). Here, the control circuit 72 determines whether or not the user intends to operate the operating unit 6 to perform a display mode switching operation or to confirm display mode D.
  • control circuit 72 determines whether the crown 61 is not in the first position (step ST1: NO), it determines whether the day has been changed (step ST2).
  • the control circuit 72 determines whether or not to perform step rotation drive of the moon phase plate 42 by determining whether or not the day information has counted up by one count based on the internal time.
  • step ST2 determines whether the day has changed (step ST2: Yes)
  • step ST3 determines whether the count N of the moon phase board 42 is 58 or not.
  • the control circuit 72 determines whether the moon phase board 42 has rotated two steps before one revolution of 60 steps (60 days), that is, 58 steps. If the control circuit 72 determines that the day has not changed (step ST2: No), it ends this control cycle and moves to the next control cycle.
  • step ST3 determines that the count N of the moon age board 42 is not 58 (step ST3: No), it rotates the moon age board 42 one step (step ST4).
  • control circuit 72 increments the count N of the age board 42 by one count (step ST5), ends this control cycle, and moves to the next control cycle.
  • step ST3 determines that the count N of the moon age board 42 is 58 (step ST3: Yes), it rotates the moon age board 42 by two steps (step ST4).
  • control circuit 72 resets the count N of the moon phase board 42 to 0 (step ST6), ends this control cycle, and moves to the next control cycle. In other words, the control circuit 72 rotates the moon phase board 42 two steps once during one rotation.
  • control circuit 72 determines that the crown 61 is in the first position (step ST1: Yes), it drives the function hand 51 to rotate in steps based on the current display mode DR (step ST8).
  • control circuit 72 determines whether the push button 63 has been pressed (step ST9). Here, the control circuit 72 determines whether the user intends to switch the display mode.
  • step ST9 determines whether the current display mode DR is the Northern Hemisphere display mode DN (step ST10). If the control circuit 72 determines that the push button 63 has not been pressed (step ST9: No), it repeats the determination of whether the crown 61 is in the first position, i.e., step ST1.
  • control circuit 72 determines that the current display mode DR is the northern hemisphere display mode DN (step ST10: Yes), it changes the display mode D from the northern hemisphere display mode DN to the southern hemisphere display mode DS, and sets the post-switch display mode DC to the southern hemisphere display mode DS (step ST11).
  • control circuit 72 determines that the current display mode DR is not the northern hemisphere display mode DN (step ST10: No), it changes the display mode D from the southern hemisphere display mode DN to the northern hemisphere display mode DN, and sets the post-switch display mode DC to the northern hemisphere display mode DN (step ST12).
  • control circuit 72 acquires the current lunar age board step position SR (step ST13).
  • control circuit 72 calculates the post-switching lunar board step position SC based on the current lunar board step position SR (step ST14).
  • control circuit 72 calculates the first post-switching lunar board step position SC1 in the current lunar board rotation direction RR with respect to the current lunar board step position SR.
  • control circuit 72 calculates the current direction step difference SDR based on the current lunar age board step position SR and the first post-switch lunar age board step position SC1 (step ST15).
  • control circuit 72 determines whether the current direction step difference SDR is less than the predetermined number of steps SDT (step ST16).
  • the control circuit 72 determines whether driving the moon phase plate 42 to rotate in steps in either the current moon phase plate rotation direction RR or the switched moon phase plate rotation direction RC up to the switched moon phase plate step position SC will reduce power consumption of the electronic watch 1.
  • control circuit 72 determines that the current direction step difference SDR is less than the predetermined number of steps SDT (step ST16: Yes)
  • control circuit 72 determines that the current direction step difference SDR is equal to or greater than the predetermined number of steps SDT (step ST16: No)
  • it drives the moon age board 42 to rotate in a stepwise manner in the post-switching moon age board rotation direction RC to the post-switching moon age board step position SC, i.e., the second post-switching moon age board step position SC2 (step ST20).
  • control circuit 72 changes the moon phase board rotation direction R to the post-switch moon phase board rotation direction RC (step ST18).
  • control circuit 72 changes from the current display mode DR to the post-switch display mode DC.
  • the control circuit 72 drives the function hand 51 to rotate in steps based on the post-switching display mode DC (step ST19), ends this control cycle, and moves to the next control cycle.
  • the step rotation drive of the function hand 51 based on the post-switching display mode DC is performed after the moon phase plate rotation direction R is changed to the post-switching moon phase plate rotation direction RC (step ST18), but this is not limited to this, and may be performed from after it is determined that the push button 63 has been pressed (step ST9: Yes) until the current moon phase plate step position SR is obtained (step ST13), that is, immediately after switching to the display mode D.
  • the third actuator 73c drives the moon phase plate 42 to rotate in steps from the reference moon age MB to the post-switch moon phase plate step position SC corresponding to the post-switch moon phase plate rotation position corresponding to the post-switch moon age MC that is away from the reference moon age difference MD on the opposite side to the current moon age side.
  • the moon phase plate 42 rotates once in 60 steps
  • the control circuit 72 drives the moon phase plate 42 to rotate one step per day, and drives the moon phase plate 42 to rotate in two steps per day once every 59 days, so that the moon phase plate 42 completes two synodic cycles in 59 days, making one synodic cycle 29.5 days, which is closer to the actual lunar mean synodic cycle of 29.530589 compared to a synodic cycle of 30 days. Therefore, even if one synodic cycle on the moon phase plate 42 is 30 days, it is possible to approach the mean synodic cycle of 29.530589, and the error between the lunar phase display and the actual lunar phase of the moon can be reduced.
  • the control circuit 72 rotates the age board 42 in the current age board rotation direction RR if the current direction step difference SDR, which is the rotation angle of the age board 42 when rotated in the current age board rotation direction RR from the current age board step position SR to the post-switched age board step position SC corresponding to the post-switched age board rotation position, is less than a specified number of steps SDT corresponding to the specified rotation angle, and rotates the age board 42 in the post-switched age board rotation direction RC if the current direction step difference SDR is equal to or greater than the specified number of steps SDT, but is not limited to this.
  • the control circuit 72 may rotate the age board 42 in the forward direction RY when a forward direction step difference SDY, which is a rotation angle of the age board 42 when rotated in the forward direction RY from the current age board step position SR to a post-switching age board step position SC corresponding to the post-switching age board rotation position, is less than a predetermined number of steps SDT corresponding to a predetermined rotation angle, and may rotate the age board 42 in the reverse direction RN when the forward direction step difference SDY is equal to or greater than the predetermined number of steps SDT.
  • a forward direction step difference SDY which is a rotation angle of the age board 42 when rotated in the forward direction RY from the current age board step position SR to a post-switching age board step position SC corresponding to the post-switching age board rotation position
  • the predetermined number of steps SDT which is the predetermined rotation angle
  • the predetermined number of steps SDT may be set based on the difference between the forward direction step difference SDY, which is the forward direction rotation angle, and the forward direction step difference SDN, which is the rotation angle of the age board when the age board 42 is rotated in the reverse direction RN from the current age board step position SR to the post-switching age board step position SC, and the difference in power consumption due to the age board rotation direction R.
  • the power consumption of the electronic watch 1 is greater when rotating the moon phase plate 42 one step in the reverse direction RN than when rotating it one step in the forward direction RN.
  • the specified number of steps SDT is set based on both the difference between the forward direction step difference SDY and the reverse direction step difference SDN (
  • the predetermined number of steps SDT in this embodiment is a fixed value, but is not limited to this, and may be different based on the current display mode DR.
  • the predetermined number of steps SDT may be different in value when the current display mode DR is the northern hemisphere display mode DN than in value when the current display mode DR is the southern hemisphere display mode DN.
  • Fig. 10 is a diagram showing an example of an operation of the moon phase display unit during a display mode switching operation in a modified example, and is an example in which the current moon phase plate rotation position and the post-switch moon phase plate rotation position are displayed with the same moon mark.
  • Fig. 11 is a diagram showing an example of an operation of the moon phase display unit during a display mode switching operation in a modified example, and is an example in which the current moon phase plate rotation position and the post-switch moon phase plate rotation position are displayed with different moon marks.
  • the colors of the moon marks 421 and 422 may be different from each other so that the user can visually distinguish them.
  • the moon mark used to display the moon phase is the moon mark 421 used for the same lunar cycle, so no discomfort is felt by the user viewing the moon phase display unit 4.
  • the moon mark used to display the moon phase is changed from the moon mark 421 to the moon mark 422 used for a lunar cycle different from the lunar cycle before the switching operation, so discomfort is felt by the user viewing the moon phase display unit 4.
  • the control circuit 72 determines that a display mode switching operation has been performed using the operating unit 6, it rotates the lunar age board 42 from the current lunar age board rotation position SR to the post-switched lunar age board step position SC1, SC2, which is the post-switched lunar age board rotation position corresponding to the moon marks 421, 422 that display the lunar phases of the syzygy cycle at the current lunar age MR, out of the first post-switched lunar age board step position SC1 and the second post-switched lunar age board step position SC2, thereby preventing the user viewing the lunar phase display unit 4 from feeling uncomfortable.
  • the control circuit 72 drives the rotation in the forward direction RY from the current lunar age board step position SR to the switched lunar age board step position SC.
  • the control circuit 72 drives the rotation in the reverse direction RN from the current lunar age board step position SR to the switched lunar age board step position SC.
  • the control circuit 72 drives and rotates in the reverse direction RN from the current lunar age board step position SR to the switched lunar age board step position SC. Also, when the display mode is the southern hemisphere mode DS and the current lunar age MR based on the current lunar age board step position SR is greater than the reference lunar age MB (MR>MB), the control circuit 72 drives and rotates in the forward direction RY from the current lunar age board step position SR to the switched lunar age board step position SC.
  • the moon phase board 42 is driven to rotate one step per day, but this embodiment is not limited to this, and the moon phase board 42 may be driven to rotate n steps per day (n>1). In this case, if the moon phase board 42 rotates once in 60 steps by performing step rotation drive of one step per day, it will rotate once in 60 x n steps by performing step rotation drive of n steps per day.
  • one rotation of the moon phase plate 42 displays the moon phase corresponding to the moon age for two synodic cycles, but this is not limited to this, and one rotation of the moon phase plate 42 may display the moon phase corresponding to the moon age for one synodic cycle.
  • the moon phase plate step position SC after switching will be the number of synodic cycles, i.e., 1.
  • the control circuit 72 rotates the moon age board 42 one step per day, and once every 59 days, the control circuit 72 rotates the moon age board 42 in two steps per day, but this is not limited to this, and the moon age board 42 may be rotated in two steps per day once every two months based on the internal time.
  • the moon age board 42 rotates once in 60 steps, but this is not limited to this, and it is sufficient that the moon age board 42 rotates once in an even number of steps, for example, the moon age board 42 may rotate once in 58 steps.
  • the control circuit 72 determines that the count N of the moon age board 42 is 58, it rotates it one step, and does not set the count N of the moon age board 42 to 0, and when it is determined that the day is to be changed, it does not rotate it one step, and sets the count N of the moon age board 42 to 0.
  • the moon age board 42 may rotate once in an odd number of steps, for example, the moon age board 42 may rotate once in 59 steps.
  • the reference age MB will be set to 14.5.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Electromechanical Clocks (AREA)

Abstract

La présente invention concerne un circuit de commande 72 d'une horloge électronique 1 qui utilise un troisième actionneur 72c pour commander un sens de rotation de disque de phase lunaire R, qui est le sens de rotation d'un disque de phase lunaire 42, et une position de rotation de disque de phase lunaire (position de pas de disque de phase lunaire S), qui est la position de rotation du disque de phase lunaire 42. Après avoir déterminé qu'une opération de commutation entre un mode d'affichage d'hémisphère Nord DN et un mode d'affichage d'hémisphère Sud DS a été effectuée par l'intermédiaire d'une unité d'opération, le circuit de commande 72 amène le disque de phase lunaire 42 à être entraîné en rotation par pas d'une position de rotation de disque de phase lunaire actuelle (position de pas de disque de phase lunaire actuelle SR) à une position de rotation de disque de phase lunaire après commutation (position de pas de disque de phase lunaire après commutation SC) qui est espacée d'une phase lunaire de référence MB d'une différence de phase lunaire de référence MD dans un sens éloigné d'une phase lunaire actuelle MR, la différence de phase lunaire de référence MD étant une différence de phase lunaire de la phase lunaire actuelle MR basée sur la position de rotation de disque de phase lunaire actuelle (position de pas de disque de phase lunaire actuelle SR) par rapport à la phase lunaire de référence MB. Ceci permet de réduire la charge de calcul sur le circuit de commande pendant une opération de commutation concernant un mode d'affichage d'hémisphère d'une unité d'affichage de phase lunaire.
PCT/JP2023/034951 2022-10-27 2023-09-26 Horloge électronique WO2024090100A1 (fr)

Applications Claiming Priority (2)

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JP2022-171940 2022-10-27
JP2022171940A JP2024063829A (ja) 2022-10-27 2022-10-27 電子時計

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WO2024090100A1 true WO2024090100A1 (fr) 2024-05-02

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004239912A (ja) * 2003-02-07 2004-08-26 Richemont Internatl Sa ムーンフェーズ表示機構
JP2016508614A (ja) * 2013-03-01 2016-03-22 タイメックス グループ ユーエスエイ，インコーポレイテッド 月位相表示装置を備えた着用型装置
JP2018155747A (ja) * 2017-03-20 2018-10-04 ウーテーアー・エス・アー・マニファクチュール・オロロジェール・スイス ユニバーサルムーンフェイズ表示装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004239912A (ja) * 2003-02-07 2004-08-26 Richemont Internatl Sa ムーンフェーズ表示機構
JP2016508614A (ja) * 2013-03-01 2016-03-22 タイメックス グループ ユーエスエイ，インコーポレイテッド 月位相表示装置を備えた着用型装置
JP2018155747A (ja) * 2017-03-20 2018-10-04 ウーテーアー・エス・アー・マニファクチュール・オロロジェール・スイス ユニバーサルムーンフェイズ表示装置

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