JP6510945B2 - clock - Google Patents

Description

  The present invention relates to a timepiece provided with a mechanism for detecting the position of a pointer.

  Conventionally, there have been clocks such as a radio correction clock that measures time based on standard radio waves or GPS radio waves, a perpetual calendar clock, etc., in which the position of a target pointer is corrected. In such a watch, for example, a gear train for transmitting the driving force of the motor to a gear (handwheel) supporting a pointer is provided with a detection gear that rotates at the same speed as the pointer wheel to form a train wheel There is a system in which a detection hole provided in the gear and a detection hole provided in the detection gear overlap one time each time the pointer rotates once. In such timepieces, there has been a technique of detecting the position of the pointer by passing the light emitted by the light emitting element through the overlapping detection holes and receiving the light by the light receiving element.

  Also, conventionally, for example, the winding direction of the drive coil of the stepping motor, the direction of the magnetic pole of the rotor, and the positional relationship of the gears for reference position detection are set in advance at the time of assembly of the watch. There has been a technique in which detection signals are acquired once every two steps in synchronization with the timing of pulse input to either the winding start terminal or the winding end terminal of the drive coil (for example, Patent Document 1 below) See).

  Also, conventionally, for example, supply state identification data indicating the supply state of the drive current previously applied to the winding start terminal and the winding end terminal of the coil is read out, and the pointer wheel is read according to the contents of the read supply state identification data. There has been a technique in which control is performed to detect the position (see, for example, Patent Document 2 below).

Patent No. 3872688 Patent No. 4730397

  However, the above-described conventional technology has a problem that there are many restrictions on the incorporation of each component constituting the drive mechanism (movement). Specifically, for example, a pointer whose position is to be detected, a pointer wheel indicating the pointer, a positional relationship of gears constituting a train of wheels transmitting the rotation of the rotor to the pointer wheel, an arrangement direction of the motor, an electronic circuit portion There are many restrictions on the incorporation of the components that make up the drive mechanism (movement), such as the initial phase of the pulse signal output to the motor.

  Further, in the above-described prior art, since there are many restrictions on incorporation of each part, the incorporation variation of each component is likely to occur, and the detection position and detection hole of the sensor used for detecting the position of the pointer wheel When the position of the object to be detected is shifted, there is a problem that the detection accuracy of the pointer wheel is lowered.

  SUMMARY OF THE INVENTION It is an object of the present invention to provide a timepiece capable of accurately detecting the position of a pointer wheel without being affected by built-in variations, in order to solve the above-mentioned problems of the prior art.

  Another object of the present invention is to provide a timepiece capable of reducing the burden on the worker during manufacture in order to solve the above-mentioned problems of the prior art.

  In order to solve the problems described above and achieve the object, a timepiece according to the present invention comprises a pointer wheel rotatable about an axis, a motor connected to the pointer wheel to rotate the pointer wheel, and the pointer wheel Detection wheel that can rotate around an axis in conjunction with the rotation of the sensor, a detection hole that penetrates the detection car in the axial direction, and a detection position on the movement trajectory of the detection hole with the rotation of the detection car A light emitting element for emitting light, a light receiving element provided with a light receiving element opposed to the light emitting element with the detection vehicle interposed therebetween, and control means for driving and controlling the motor. The control means determines the first state or the second state based on the amount of light received by the light receiving element each time the motor is driven by one step, and the detection sensitivity of the light sensor is normally determined. Higher than the sensitivity at the time of The switching position at which the first state and the second state are switched is specified based on the result of the state determination in the state where the sensitivity is set, and the position one step after the specified switching position is the light sensor In the first state in which the detection sensitivity is set to the first sensitivity, and the position one step before the switching position is lower in the detection sensitivity of the optical sensor than the sensitivity at the time of normal movement It is determined whether or not the second state is set in the state where the sensitivity is set, and when the amount of light received at the switching position or the position one step before the switching position is the maximum value, Whether the result of the state determination at a position different by a predetermined number of steps from the switching position is different from the result of the state determination at a position one step before the switching position or the switching position And detecting the position of the hand wheel by disconnection.

  Further, in the timepiece according to the present invention, in the above-mentioned invention, the control means causes the light receiving amount to be a predetermined amount or more based on the light receiving amount of the light receiving element every time the motor is driven one step. Is determined to be in the first state, and a dark state in which the light reception amount is less than the predetermined amount is determined to be in the second state, and the detection sensitivity of the optical sensor is The switching position at which the dark state is switched to the bright state is specified based on the result of the state determination in the state where the sensitivity is set, and the position one step after the specified switching position corresponds to the detection sensitivity of the light sensor. It becomes bright state when it is set to the sensitivity of 1, and whether the position one step before the switching position becomes dark state when the detection sensitivity of the light sensor is set to the second sensitivity. Judge, before When the amount of light received at the switching position is the maximum value, it is determined whether or not the position before the switching position by a predetermined number of steps is dark and the switching position is bright at the time of normal movement. To detect the position of the pointer wheel.

  Further, in the timepiece according to the present invention, in the above-mentioned invention, when the control means is in normal movement, the position two steps before the switching position is dark and the switching position is bright. It is characterized in that the position of the pointer wheel is detected by judging whether there is any.

  Further, in the timepiece according to the present invention, in the above-mentioned invention, when the received light amount at the switching position is not the maximum value in the above-described control means, the position before the switching position by a predetermined number of steps is dark during normal movement. It is characterized in that the position of the pointer wheel is detected by judging whether or not the position after a predetermined number of steps from the switching position is a light state.

  Further, in the timepiece according to the present invention, in the above-mentioned invention, the control means causes the light receiving amount to be less than the predetermined amount based on the light receiving amount of the light receiving element every time the motor is driven by one step. It is determined that the state is the first state, and a light state in which the light reception amount is equal to or more than a predetermined amount is determined as the second state, and the detection sensitivity of the light sensor is The switching position at which the light state is switched to the dark state is specified based on the result of the state determination in the state set to the sensitivity, and the position one step after the specified switching position corresponds to the detection sensitivity of the light sensor. Whether the dark state occurs when the sensitivity is set to 1 and the position one step before the switching position becomes the bright state when the detection sensitivity of the light sensor is set to the second sensitivity Judge, before When the light reception amount at the position one step before the switching position is the maximum value, the position after a predetermined number of steps from the switching position is dark during normal movement and one step from the switching position It is characterized in that the position of the pointer wheel is detected by determining whether or not the previous position is in the bright state.

  Further, in the timepiece according to the present invention, in the above-mentioned invention, at the time of normal movement, the control means is in a dark state two steps after the switching position, and one step more than the switching position. It is characterized in that the position of the pointer wheel is detected by determining whether or not the previous position is in the bright state.

  Further, in the timepiece according to the present invention, in the above-mentioned invention, when the light receiving amount at the position one step before the switching position is not the maximum value in the above-mentioned control means, at the time of normal hand movement, The position of the pointer wheel is determined by determining whether the position before the predetermined number of steps from the position one step before is bright and the position after the predetermined number of steps from the switching position is dark. It is characterized by detecting.

  In the timepiece according to the present invention, in the above-mentioned invention, the control means adjusts at least one of the light emission intensity of the light emitting element and the light receiving sensitivity of the light receiving element to set the detection sensitivity of the light sensor. It features.

  In the timepiece according to the present invention, in the above-mentioned invention, the clocking means for clocking the time is provided, and the control means is lower than the first sensitivity and the second sensitivity and the second sensitivity in the normal hand movement. Using a third sensitivity that is the same or higher than the second sensitivity, it is determined whether the result of the state determination at a position different by a predetermined number of steps from the switching position is different from the result of the state determination at the switching position By detecting the position of the pointer wheel.

  In the timepiece according to the present invention, in the above-mentioned invention, the date indicator at the time of normal movement when the date indicator is connected to the pointer wheel and the control means receives a predetermined input operation. The reference position setting operation for setting the position for performing the state determination according to the detection of the position of the position is performed, and as a result of performing the reference position setting operation, when the position for performing the state determination is set, drive control of the motor is performed. The date indicated by the date changer is changed to a date advanced from the date when the predetermined input operation is accepted, and as a result of performing the reference position setting operation, the position for performing the state determination is not set. In this case, the motor drive control is performed to change the date indicated by the date driving vehicle to a date that is earlier than the date at the time of receiving the predetermined input operation.

  According to the watch of the present invention, the position of the pointer wheel can be accurately detected without being affected by the built-in variation.

  Further, according to the watch of the present invention, it is possible to reduce the burden on the worker during the manufacture.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which shows the external appearance of the electromagnetic wave correction timepiece of Embodiment 1 concerning this invention. It is explanatory drawing which shows the hardware constitutions of the electromagnetic wave correction timepiece of Embodiment 1 concerning this invention. It is explanatory drawing which shows the structure of the reference (standard) position setting mechanism with which the electromagnetic wave correction timepiece of Embodiment 1 concerning this invention is equipped. It is a block diagram which shows the functional structure of the electromagnetic wave correction timepiece of Embodiment 1 concerning this invention. It is explanatory drawing which shows the relationship between the aperture ratio of the detection hole provided in the detection vehicle, and the detection level in an optical sensor. FIG. 7 is an explanatory view (part 1) showing the relationship between the detection sensitivity and the detection level of the light sensor and the phase of the motor in the radio-wave correction timepiece of the first embodiment. FIG. 13 is an explanatory view (part 2) showing the relationship between the detection sensitivity and the detection level of the light sensor and the phase of the motor in the radio-wave correction timepiece of the first embodiment. FIG. 13 is an explanatory view (part 3) showing the relationship between the detection sensitivity and the detection level of the light sensor and the phase of the motor in the radio-wave correction timepiece of the first embodiment. It is a flowchart (the 1) which shows the process sequence of the reference (standard) position setting operation | movement which the electromagnetic wave correction timepiece of Embodiment 1 concerning this invention performs. It is a flowchart (the 2) which shows the process sequence of the reference (standard) position setting operation | movement which the electromagnetic wave correction timepiece of Embodiment 1 concerning this invention performs. FIG. 14 is an explanatory view (part 1) showing a relationship between a detection sensitivity and a detection level of an optical sensor and a phase of a motor in the radio-wave correction timepiece of the second embodiment. FIG. 16 is an explanatory view (part 2) showing the relationship between the detection sensitivity and the detection level of the light sensor and the phase of the motor in the radio-wave correction timepiece of the second embodiment. FIG. 16 is an explanatory view (part 3) showing the relationship between the detection sensitivity and the detection level of the light sensor and the phase of the motor in the radio-wave correction timepiece of the second embodiment. It is a flowchart (the 1) which shows the process sequence of the reference (standard) position setting operation | movement which the electromagnetic wave correction timepiece of Embodiment 2 concerning this invention performs. It is a flowchart (the 2) which shows the process sequence of the reference (standard) position setting operation | movement which the electromagnetic wave correction timepiece of Embodiment 2 concerning this invention performs.

  Hereinafter, preferred embodiments of a watch according to the present invention will be described in detail with reference to the accompanying drawings.

Embodiment 1
(Configuration of radio correction clock)
First, the configuration of a radio-controlled timepiece according to a first embodiment of the present invention will be described. FIG. 1 is an explanatory view showing the appearance of a radio-controlled timepiece according to a first embodiment of the present invention. In FIG. 1, a radio wave correction watch 100 according to a first embodiment of the present invention includes a case (outer case) 101 which forms an exterior of the radio wave correction watch 100. The case 101 is formed of, for example, a metal material, and has a substantially cylindrical shape with both ends open.

  At one end side (front side) of the substantially cylindrical case 101, a windshield 102 for closing the opening on the front side and a bezel 103 for supporting the periphery of the windshield 102 are provided. The windshield 102 is formed of, for example, a transparent glass material and has a substantially disc shape. The bezel 103 is formed of, for example, a metal material, and has an annular shape having an inner diameter substantially the same as the diameter of the windshield 102.

  On the other end side (back side) of the case 101, a back cover member for closing the opening on the back side is provided. The back cover member can be formed, for example, using a metal material. Alternatively, the back cover member may be formed using a polymeric material called plastic or the like. The back cover member can be attached to the case 101 by using various known techniques such as a screw back method, a fitting method, and a screw cover method. The method of attaching the back cover member to the case 101 can be easily realized using various known techniques, and thus the description thereof is omitted.

  The shape of the case 101 is not limited to the above. The case 101 may have an opening at least on the front side in the axial direction. In the radio wave correction watch 100 according to the first embodiment of the present invention, the back side of the case 101 may be closed by a so-called one-piece structure in which the case 101 and the back cover member are integrated.

  The case 101 is provided with an operation unit 104. The operation unit 104 can be realized by, for example, a crown or an operation button. When the operation unit 104 receives an operation by the user, the operation unit 104 outputs a signal corresponding to the content of the operation to the control circuit. The control circuit executes processing such as satellite signal reception processing according to the content of the operation input received by the operation unit 104.

  Inside the case 101, a dial 105 is provided. The dial 105 is provided with an index (index) 107 indicating the position of the time indication hand 106, that is, the time. Specifically, the time pointing hand 106 can be realized by, for example, an hour hand 106a, a minute hand 106b, a second hand 106c, and the like. The time pointing needle 106 can be formed using, for example, a metal material. The time pointing needle 106 is not limited to one formed using a metal material, and may be formed using, for example, a polymer material called plastic or the like.

  The index 107 is disposed on a circumference centered on the axis of the time pointing hand 106. The index 107 can be realized by, for example, letters, numbers, symbols, and the like. The index 107 is not limited to letters, numbers, and symbols, and may be realized by, for example, a protrusion provided on the dial 105. In the radio wave correction watch 100 according to the first embodiment of the present invention, the index 107 can be formed, for example, using a metal material. The index 107 may be printed on the dial 105 or may be realized by providing another member such as metal.

  In the radio wave correction watch 100 according to the first embodiment of the present invention, the indexes 107 can be arranged on the same circumference centering on the rotation center of the time pointing hand 106. In this case, for example, each index 107 is at least partially outside the rotation range of the time pointing hand 106, that is, the circle formed by the trajectory of the tip of the time pointing hand 106 due to the rotation of the time pointing hand 106. It can be arranged to be located at

  The indexes 107 are not limited to those in which all the indexes 107 are arranged on the same circumference centering on the rotation center of the time pointer 106. In radio correction clock 100 according to the first embodiment of the present invention, at least a portion of indexes 107 of index 107 are arranged within the rotation range of time pointing hand 106, and another portion of indexes 107 indicates time It may be disposed on the outer peripheral side of the rotation range of the needle 106.

  Further, on the dial 105, a marker 108 for displaying information on the reception control of the satellite signal by the antenna is arranged. The marker 108 can be realized by, for example, a character string such as “RX” indicating that a satellite signal is being received or “NO” or “OK” indicating the success or failure of reception processing of a satellite signal by an antenna.

(Hardware configuration of radio wave correction watch 100)
Next, the hardware configuration of the radio wave correction watch 100 according to the first embodiment of the present invention will be described. FIG. 2 is an explanatory view showing a hardware configuration of the radio-controlled timepiece 100 according to the first embodiment of the present invention.

  In FIG. 2, the radio wave correction watch 100 according to the first embodiment of the present invention includes an antenna 201, a reception circuit 202, a control circuit 203, a power supply 204, a booster unit 205, a solar cell 206, and a drive mechanism 209. , A time display unit 109, an optical sensor 214, an optical sensor 215, and an optical sensor 216. The antenna 201, the receiving circuit 202, the control circuit 203, the power supply 204, the boosting unit 205, the solar cell 206, the driving mechanism 209, the time display unit 109, the light sensor 214, the light sensor 215, and the light sensor 216 And in the space enclosed by the dial 105 and the dial 105.

  The antenna 201 receives satellite signals transmitted from GPS (Global Positioning System) satellites. Specifically, the antenna 201 can be realized by, for example, a patch antenna that receives radio waves with a frequency of about 1.6 GHz that is transmitted from a GPS satellite. Each of the GPS satellites orbits the earth, carries a highly accurate atomic clock, and periodically transmits satellite signals including time information clocked by the atomic clock. The antenna 201 receives satellite signals transmitted from a plurality of GPS satellites.

  The antenna 201 may also receive a standard radio wave transmitted from a predetermined transmission station. The standard radio wave is a radio wave transmitted by a government or an international organization as a national standard or standard of standard time and frequency, for example, transmitted from a standard frequency signal station such as JJY, with a time code superimposed thereon.

  The receiving circuit 202 decodes the satellite signal (or standard radio wave) received by the antenna 201, and outputs a bit string (received data) indicating the content of the satellite signal obtained as a result of the decoding. Specifically, the receiving circuit 202 is configured to include a high frequency circuit (RF circuit) 202a and a decoding circuit 202b. The high frequency circuit 202a is an integrated circuit operating at a high frequency, performs amplification and detection on an analog signal received by the antenna 201, and converts it into a baseband signal. The decoding circuit 202b is an integrated circuit that performs baseband processing, decodes the baseband signal output from the high frequency circuit, generates a bit string indicating the content of data received from the GPS satellite, and outputs the bit string to the control circuit 203. Do.

  The control circuit 203 is a micro computer configured including an arithmetic operation unit 203a, a read only memory (ROM) 203b, a random access memory (RAM) 203c, a real time clock (RTC) 203d, and a motor drive circuit 203e. It can be realized by a computer.

  The arithmetic unit 203a performs various information processing in accordance with various control programs stored in the ROM 203b. The RAM 203c functions as a work memory of the arithmetic unit 203a, and data to be processed by the arithmetic unit 203a is written. The RTC 203 d outputs a clock signal used to measure time in the radio wave correction watch 100 to the calculation unit 203 a.

  The arithmetic unit 203a counts internal time based on the clock signal output from the RTC 203d. In addition, the calculation unit 203a corrects the measured internal time based on the satellite signal received by the reception circuit 202, and determines the time (display time) at which the time pointing hand 106 should be displayed on the time display unit 109.

  Further, the operation unit 203a sets a reference position of a pointer wheel for instructing the time pointing hand 106 (the hour hand 106a, the minute hand 106b, and the second hand 106c) which is a setting target of the reference position by the reference position setting mechanism. A drive signal is output to the motor drive circuit 203e based on the reference position of the above to correct the display time. The reference position is a position at which a light state is detected by the light sensors 214 to 216, and is set for each radio-controlled timepiece 100. In the radio correction clock 100, in addition to the reference position for detecting the bright state, the steering position for detecting the dark state is also set. The method of setting the reference position and the steering position will be described later.

  The drive mechanism (movement) 209 can be configured to include a motor that operates according to a drive signal output from the motor drive circuit 203 e and a wheel train. Specifically, the motor can be realized by, for example, a step motor, and performs a forward rotation (clockwise) or a reverse rotation (counterclockwise) according to the drive pulse output from the motor drive circuit 203e. The drive mechanism 209 rotates the time pointing hand 106 by transmitting the rotation of the motor (step motor) to the time pointing hand 106 via the wheel train.

  In the drive mechanism 209, one or more motors may be provided. In the radio wave correction watch 100 including a plurality of motors, for example, the hour hand 106a, the minute hand 106b, the second hand 106c, and the like that realize the time pointing hand 106 can be independently driven by independent motors. In this case, the motor and the wheel train are provided in the same number as the number of time pointing hands 106. In the radio-controlled timepiece 100 having a plurality of motors, the number of motors and the number of time indication hands 106 do not have to match.

  Specifically, for example, of the time pointing hands 106, the minute hand 106b and the second hand 106c may be driven by the first motor, and the second motor may drive the hour hand 106a of the time pointing hands 106. In this case, the number of motors and wheel trains is smaller than the number of time pointing hands 106.

  The radio wave correction watch 100 according to the first embodiment includes a second single motor for driving the second hand 106 c of the time pointing hands 106, a minute single motor for driving the minute hand 106 b of the time pointing hands 106, and the time pointing hand 106. When driving the hour hand 106a of the above, a single motor is provided. In the radio-wave correction watch 100, a date indicator may be provided as the time-pointing hand 106 in addition to the hour hand 106a, the minute hand 106b, and the second hand 106c.

  In the radio correction watch 100, when a drive signal corresponding to the display time determined by the calculation unit 203a is output to the drive mechanism 209, the motor is driven and the time pointing hand 106 is connected via the wheel train connected to the motor. Will rotate. Thus, the display time generated by the control circuit 203 can be displayed in the time display unit 109.

  The power source 204 can be realized by, for example, a secondary battery such as a lithium ion battery. The power source 204 accumulates (stores) electric power generated by the solar cell 206 (solar cell). The solar cell 206 is disposed on the back cover side of the dial 105, generates electricity from light such as sunlight incident on the dial 105 via the windshield 102, and outputs the generated electric power to the booster 205.

  The boosting unit 205 is drive-controlled by the control circuit 203, boosts the voltage of the power generated by the solar cell 206, and outputs the boosted voltage to the power supply 204. Booster 205 can be formed of, for example, a DC / DC converter. The power source 204 is not limited to the secondary battery, and may be realized by a primary battery.

  The switch 210 is provided in the middle of the power supply path from the power source 204 to the receiving circuit 202, and is switched on / off in accordance with a control signal output from the control circuit 203. In the radio-wave correction watch 100, by switching on / off the switch 210 by the control circuit 203, the operation timing of the reception circuit 202 can be controlled. The receiving circuit 202 operates, for example, only while power is supplied from the power source 204 via the switch 210, and decodes the satellite signal received by the antenna 201.

  Each of the light sensors 214 to 216 includes a light emitting element and a light receiving element (see FIGS. 3 and 4) for receiving light emitted from the light emitting element. The light sensors 214 to 216 output detection signals according to the amount of light received by the respective light receiving elements to the control circuit 203. The light sensors 214 to 216 are provided corresponding to the respective detection wheels that can rotate around their axes in conjunction with the rotation of the hour wheel 106a, the minute hand 106b, and the second hand 106c.

  In each of the light sensors 214 to 216, a plurality of different sensitivities can be set. The control circuit 203 further includes a sensitivity adjustment circuit 203f. The sensitivity adjustment circuit 203 f adjusts the sensitivity of the light sensors 214 to 216 based on the detection signals output from the light sensors 214 to 216.

  The radio wave correction watch 100 may include an LED (Light Emitting Diode), an LED driving circuit, an alarm, an alarm driving circuit (all not shown), and the like. The LED drive circuit drives the LED to illuminate the display screen as a backlight or outputs a warning light. Instead of the LED, an EL (Electroluminescence), a lamp or the like may be used. The alarm drive circuit drives a piezoelectric element (not shown) mounted on the alarm to output an alarm (buzzer). The alarm drive circuit may change and output the type, height, volume, etc. of the sound depending on the type of notification.

  Further, the radio wave correction watch 100 may be provided with a date indicator (not shown). The date dial has a disk shape or ring shape, and the peripheral edge portion is provided with numbers indicating dates of "1" to "31". The date indicator is connected to a date indicator (not shown) and rotates in conjunction with the rotation of the date indicator. The date driving wheel is connected to the pointer wheel via a date intermediate wheel (not shown) or the like, and rotates around its axis in conjunction with the rotation of the pointer wheel. The date indicator rotates once in 24 hours, and the date indicator rotates (rotates) in the direction to advance the date by one day every one rotation of the date indicator.

(Configuration of reference position setting mechanism)
Next, the configuration of the reference position setting mechanism provided in the radio wave correction watch 100 according to the first embodiment of the present invention will be described. FIG. 3 is an explanatory view showing a configuration of a reference position setting mechanism provided in the radio wave correction watch 100 according to the first embodiment of the present invention.

  Although FIG. 3 shows the configuration of the reference position setting mechanism applied to the hour hand 106a, the configuration of the reference position setting mechanism applied to the minute hand 106b and the second hand 106c is also similar to the configuration of the reference position setting mechanism applied to the hour hand 106a. It can be realized by the configuration. In order to detect three independent time pointing hands 106 of the hour hand 106a, the minute hand 106b and the second hand 106c, three reference position setting mechanisms shown in FIG. 3 are provided.

  In FIG. 3, the radio wave correction watch 100 is provided with a pointer wheel 301 that can rotate around an axis. The pointer wheel 301 supports a time pointing hand 106 (at least one of an hour hand 106 a, a minute hand 106 b, and a second hand 106 c). A motor 304 is connected to the handwheel 301 via a wheel train 303 constituted by one or more gear wheels 302. Specifically, the wheel train 303 is meshed with a pointer wheel 301 and a rotor 304 a of the motor 304. When the hour hand 106a, the minute hand 106b, and the second hand 106c are independently driven, the pointer wheel 301, the gear train 303, and the motor 304 are provided corresponding to the hour hand 106a, the minute hand 106b, and the second hand 106c (in FIG. 3, Only one line is shown).

  Connected to the pointer wheel 301 is a detection wheel 305 rotatable about its axis in conjunction with the rotation of the pointer wheel 301. The detection wheel 305 is connected to a pointer wheel 301 to be detected. The detection wheel 305 may be directly connected to the pointer wheel 301, or may be connected to the pointer wheel 301 via an intermediate wheel (gear wheel 302) different from the pointer wheel 301. Alternatively, detection holes may be provided in two gears, which are a reduction gear train that decelerates the rotation of the rotor 304a included in the motor 304, for detection.

  With such a configuration, it is possible to eliminate the need for connecting the detection vehicle 305 and to provide a configuration without the detection vehicle 305. With such a configuration, it is possible to reduce the number of parts and to reduce the burden on the operator for assembling as compared with the case where the detection vehicle 305 is connected.

  The detection wheel 305 may be provided corresponding to all of a pointer wheel supporting the hour hand 106a, a pointer wheel supporting the minute hand 106b, and a pointer wheel supporting the second hand 106c, and each may be connected to each pointer wheel . The detection wheel 305 is provided such that the rotation axis of the hour hand 106 a is parallel to the rotation axis of the pointer wheel 301. The detection wheel 305 is provided with a detection hole 305 a penetrating the detection wheel 305 in the axial direction. The detection hole 305a moves around the axis as the detection wheel 305 rotates.

  In the gear 302 which partially overlaps the detection wheel 305 in the axial direction of rotation among the gears 302 constituting the above-described gear train 303, a detection hole 302a passing through the gear 302 in the axial direction of the gear 302 is provided. It is provided. The detection hole 302a provided in the gear 302 constituting the wheel train 303 rotates around the axis with the rotation of the pointer wheel 301, and provided on the detection wheel 305 once while the pointer wheel 301 makes one rotation. It overlaps with the detection hole 305a (see FIG. 5).

  The light sensor 214 includes a light emitting element 214a that emits light and a light receiving element 214b. Light emitting element 214a can be realized, for example, by an LED or the like. The output of the light receiving element 214b changes in accordance with the amount of light received, and can be realized by, for example, a phototransistor.

  The light emitting element 214 a is provided to emit light to a detection position on the movement trajectory of the detection hole 305 a in accordance with the rotation of the detection wheel 305. Specifically, the light emitting element 214a is provided so as to emit light at a position where the detection hole 302a provided in the gear 302 constituting the wheel train 303 and the detection hole 305a provided in the detection wheel 305 overlap. ing. In the first embodiment, a position where the detection hole 302a and the detection hole 305a overlap is appropriately described as a “detection position”.

  The light receiving element 214 b is disposed to face the light emitting element 214 a with the detection wheel 305 interposed therebetween. The light emitted from the light emitting element 214a passes through the detection holes 302a and 305a when the detection holes 302a and 305a, which move as the detection wheel 305 rotates, overlap at the light emitting position of the light emitting element 214a, and is received by the light receiving element 214b. Light is received. That is, the light receiving element 214b receives the light emitted from the light emitting element 214a at the detection position.

  The control circuit 203 described above drives and controls the motor 304. Further, the control circuit 203 adjusts the sensitivity of the light sensor by controlling the sensitivity adjustment circuit 203f, and based on the light reception amount of the light receiving element 214b in the light sensor 214, the time indication hand 106 supported by the pointer wheel 301 ( The positions of the hour hand 106a, the minute hand 106b, and the second hand 106c) are specified (see FIG. 4).

(Functional configuration of radio correction watch 100)
Next, the functional configuration of the radio wave correction watch 100 according to the first embodiment of the present invention will be described. FIG. 4 is a block diagram showing a functional configuration of the radio wave correction watch 100 according to the first embodiment of the present invention. In FIG. 4, the function of the radio wave correction watch 100 according to the first embodiment of the present invention is the motor 304, the detection wheel 305 provided with the detection hole 305a, and the light sensor 214 (215 , 216), and can be realized by the control unit 401. The function of the radio wave correction watch 100 may be further realized by a date indicator and a date indicator not shown.

  The function of control unit 401 can be realized by, for example, control circuit 203. For example, when a predetermined input operation to the operation unit 104 is received, the control unit 401 performs a reference position setting operation. The reference position setting operation is realized by an operation from the reception of a predetermined input operation to the completion of the setting of the reference position of the time pointing hand 106 to be set. When adjustment is required for a plurality of pointers, adjustment may be performed simultaneously or sequentially. Also, it is not necessary to adjust the guidelines that have already been adjusted and determined not to require adjustment.

  Control relating to the reference position setting operation can be performed, for example, by executing a program stored in the ROM 203 b constituting a microcomputer that realizes the control circuit 203. Alternatively, control related to the reference position setting operation may be performed by control from the outside of the radio wave correction watch 100 (drive mechanism (movement) 209) using a predetermined inspection device or the like.

  The reference position setting operation can be performed before the completion of the assembly of the radio wave correction watch 100 and in the state where the drive mechanism (movement) 209 is assembled regardless of the completion of the assembly of the radio wave correction watch 100. Specifically, the reference position setting operation may be performed, for example, in a state where the time pointing hand 106 is not attached to the pointer wheel 301.

  The control unit 401 drives and controls the motor 304 based on the amount of light received by the light receiving element 214b in the reference position setting operation. Specifically, the control unit 401 drives the motor 304 in the reference position setting operation, and determines whether the light state or the dark state each time the motor 304 is driven by a predetermined number of steps. More specifically, the control unit 401 performs state determination to determine whether the motor 304 is in the bright state or the dark state, for example, each time it is driven by one step.

  Then, the control unit 401 sets the detection sensitivity of the light sensor 214 to the first sensitivity higher than the sensitivity at the time of normal hand movement, and based on the result of the state determination in the state set to the first sensitivity. The switching position X at which the light state and the light state are switched is specified. The first sensitivity can be, for example, a detection sensitivity preset as the highest detection sensitivity that can be set in the light sensor 214. Specifically, when specifying the switching position X, for example, the control unit 401 drives the motor 304 one step at a time, and continuously performs a plurality of times (for example, twice) based on the determination result of the bright state or the dark state. The position which becomes bright after the determination of the dark state is detected as the switching position X.

  Next, when the control unit 401 detects the switching position X, the next position of the switching position X (one step from the switching position X to the motor 304) with the detection sensitivity of the optical sensor 214 set to the first sensitivity. Driven position) It is determined whether X + 1 is dark or bright. Then, when the next position X + 1 of the switching position X is in the bright state, the next position X + 1 is specified as the reference position X + 1.

  The detection sensitivity of the light sensor 214 can be set to the first sensitivity, for example, by increasing the output of the light emitting element 214 a by the control unit 401. Specifically, for example, the sensitivity adjustment circuit 203f can increase the output of the light emitting element 214a by increasing the amount of current supplied to the LED that realizes the light emitting element 214a.

  Further, the detection sensitivity of the light sensor 214 can be enhanced, for example, by increasing the light reception sensitivity of the light receiving element 214b. Specifically, the light receiving sensitivity of the light receiving element 214b is to increase the light receiving sensitivity of the light receiving element 214b by increasing the amplification factor of the electric signal according to the contrast of the light received by the light receiving element 214b in the sensitivity adjustment circuit 203f. Can.

  As described above, the detection sensitivity of the light sensor 214 can be adjusted by adjusting at least one of the light emission intensity of the light emitting element 214a and the light receiving sensitivity of the light receiving element 214b. The detection sensitivity of the light sensor 214 may be adjusted by adjusting both the light emission intensity of the light emitting element 214a and the light receiving sensitivity of the light receiving element 214b. The detection sensitivity of the light sensors 215 and 216 can also be performed in the same manner as the adjustment of the detection sensitivity of the light sensor 214.

  Thereafter, the control unit 401 stores information on the specified reference position X + 1. The control unit 401 includes a storage unit 401 a that stores information related to the reference position X + 1. The storage unit 401a can be realized by, for example, the ROM 203b. The information on the reference position X + 1 can be realized by information that can specify the position of the pointer wheel 301 at the time when it is determined to be the bright state after being determined to be the dark state twice in a row.

  When the control unit 401 detects the dark state twice in succession after detecting the dark state twice in a state where the detection sensitivity of the light sensor 214 is set to the first sensitivity, the control unit 401 further performs an additional cycle. After the dark state has been detected twice continuously, within one cycle after the light state has been detected twice continuously, the dark state has been detected twice continuously and the light state has been detected twice It may be confirmed that there is no position to be detected continuously. As a result, while the pointer wheel 301 makes one revolution, it is possible to confirm that there are no two or more positions where the bright state is detected twice consecutively after detecting the dark state twice continuously, and the reference position is accurate Can be identified.

  Next, after specifying the switching position X and the reference position X + 1, the control unit 401 sets the detection sensitivity of the light sensor 214 to the second sensitivity, and at the position X-1 one step before the switching position X It is determined whether or not it is dark. The second sensitivity can be, for example, lower than that at normal hand movement. The second sensitivity may be, for example, a detection sensitivity preset as the lowest detection sensitivity that can be set in the light sensor 214.

  The detection sensitivity of the light sensor 214 can be adjusted by adjusting at least one of the light emission intensity of the light emitting element 214a and the light reception sensitivity of the light receiving element 214b as described above. Specifically, in the sensitivity adjustment circuit 203f, the detection sensitivity of the light sensor 214 corresponds to, for example, a decrease in the output of the light emitting element 214a, or in the sensitivity adjustment circuit 203f, the light sensitivity of the light received by the light receiving element 214b. It can be reduced by lowering the amplification factor of the electrical signal. The detection sensitivity of the light sensors 215 and 216 can also be performed in the same manner as the adjustment of the detection sensitivity of the light sensor 214.

  The control unit 401, for example, positively rotates the motor 304 at a speed faster than that during normal hand movement, and fast-forwards the pointer wheel 301, thereby positioning the pointer wheel 301 at the position X-1. Alternatively, the control unit 401 may position the pointer wheel 301 at the position X-1 by, for example, rotating the motor 304 in the reverse direction and rotating the pointer wheel 301 in the direction opposite to that during normal hand movement. If the motor 304 is reversely rotated and the pointer wheel 301 is rotated in the reverse direction to that of normal hand movement, reverse rotation to extra (for example, X-5 position) than position X-1 in consideration of backlash. After that, it is rotated forward to position X-1.

  Next, for example, after determining whether or not the pointer wheel 301 is in the dark state with the pointer wheel 301 positioned at the position X-1, the control unit 401 rotates the motor 304 to position the pointer wheel 301 at the switching position X It is determined whether or not the detection value (light reception amount) of the light sensor 214 at the switching position X is a maximum value, that is, a peak value (sensitivity MAX value). At this time, the motor 304 may be rotated at a speed (fast feed) faster than that at the time of normal movement or at the normal speed. Further, at this time, the motor 304 may be rotated forward or backward.

  Whether the detection value of the optical sensor 214 is the maximum value is whether the detection value of the optical sensor 214 in the state where the pointer wheel 301 is positioned at the switching position X is larger than the position X-1 and the reference position X + 1. It can be determined by The light receiving element 214b of the light sensor 214 receives the light emitted from the light emitting element 214a only in a specific range during one rotation of the pointer wheel 301. Therefore, the maximum value of the detection value of the light sensor 214 in this light reception range is the maximum value of the detection value (light reception amount) of the light sensor 214.

  When the detection value (light reception amount) of the light sensor 214 at the switching position X is the maximum value, that is, when the light sensor 214 detects a peak value at the switching position X, the control unit 401 brightens the switching position X. Set (confirm) a reference position to determine the state. Further, when the light sensor 214 detects a peak value at the switching position X, the control unit 401 performs steering for determining a dark state at a position X-2 a predetermined number of steps (for example, two steps) before the switching position X Set to position.

  The control unit 401 also stores information on the set reference position X and steering position X-2 in the storage unit 401a. If the information related to the position X + 1 is stored in the storage unit 401a as the information related to the reference position, the control unit 401 stores the information related to the reference position X in the storage unit 401a instead of the information.

  On the other hand, when the detection value (light reception amount) of the light sensor 214 at the switching position X is not the maximum value, the control unit 401 rotates the motor 304 to position the pointer wheel 301 at the reference position X + 1, and the detection sensitivity of the light sensor 214 Is set to the second sensitivity, it is determined whether the reference position X + 1 is in the bright state. In the state where the detection sensitivity of the optical sensor 214 is set to the second sensitivity, when the reference position X + 1 is in the bright state, the reference position X + 1 is set (confirmed) as the reference position for determining the bright state.

  Further, in the state where the detection value (light reception amount) of the optical sensor 214 at the switching position X is not the maximum value and the detection sensitivity of the optical sensor 214 is set to the second sensitivity, the control unit 401 sets the reference position X + 1. In the case of the bright state, a position X-1 a predetermined number of steps (for example, two steps) before the reference position X + 1 is set as the steering position for determining the dark state. The control unit 401 stores information on the set reference position X + 1 and the steering position X-1 in the storage unit 401a.

(Relationship between detection hole aperture ratio and detection level)
Next, the relationship between the aperture ratio of the detection hole 305 a provided in the detection wheel 305 and the detection level of the light sensor 214 will be described. FIG. 5 is an explanatory view showing the relationship between the aperture ratio of the detection hole 305 a provided in the detection wheel 305 and the detection level of the light sensor 214.

  In the drive mechanism (movement) 209, when the detection hole 305a and the detection hole 302a overlap, a hole (hereinafter referred to as an “opening” as appropriate) penetrating in the optical axis direction of the light sensor 214 is formed. The ratio of the opening to the detection hole 305a varies depending on the degree of overlap between the detection hole 305a and the detection hole 302a.

  As shown in FIG. 5, when the detection level of the light sensor 214 at the position where the detection hole 305a and the detection hole 302a completely overlap is 100% aperture ratio, the detection hole 305a and the detection hole 302a do not overlap (see FIG. 5) The aperture ratio at (1) in 5) is 0 (zero) (see A in FIG. 5). When the detection wheel 305 and the gear 302 rotate with the rotation of the pointer wheel 301 by driving the motor 304, the overlapping area of the detection hole 305a and the detection hole 302a gradually increases ((2) in FIG. 5). See the figure).

  The light emitted from the light emitting element 214a passes through the opening and is received by the light receiving element 214b, so the amount of light received by the light receiving element 214b (the detection level of the light sensor 214), that is, the aperture ratio fluctuates according to the size of the aperture. . Specifically, as the aperture gradually increases, the aperture ratio also gradually increases (see B, C, and D in FIG. 5). After the openings are maximized (see (3) and (4) in FIG. 5), they gradually become smaller (see (5) in FIG. 5) and become non-overlapping again. Relatively displaced. Along with this, the aperture ratio also gradually decreases (see E in FIG. 5).

  In a state where the drive mechanism (movement) 209 is assembled as designed, the detection position of the light sensor 214 coincides with the position where the detection hole 305 a and the detection hole 302 a completely overlap. However, in the driving mechanism (movement) 209, variations in the positions of the respective elements 214a and 214b with respect to the substrate on which the light emitting elements 214a and the light receiving elements 214b are mounted, variations in the mounting positions of these substrates, and the wheel train 303 are configured. The detection position of the optical sensor 214 does not coincide with the position where the detection hole 305a and the detection hole 302a completely overlap, due to variations in the position of the gear 302 (hereinafter referred to as "embedded variation"). The position of may shift.

  When the detection position in the optical sensor 214 and the position where the detection hole 305a and the detection hole 302a completely overlap with each other, the aperture ratio is 100% even in the state where the detection hole 305a and the detection hole 302a completely overlap. Will not reach. In such a case, the maximum value of the actual aperture ratio does not reach 100% when the drive mechanism (movement) 209 is assembled as designed, but the detection value of the optical sensor 214 changes in a peak shape. The detection hole 305a and the detection hole 302a change from a non-overlapping state to a completely overlapping state, and show a maximum value (peak value) between the non-overlapping state.

(Detection sensitivity and relationship between detection level and phase)
Next, the relationship between the detection sensitivity and the detection level of the light sensor 214 and the phase of the motor 304 in the radio wave correction watch 100 of the first embodiment will be described. 6A, 6B and 6C are explanatory diagrams showing the relationship between the detection sensitivity and the detection level of the light sensor 214 and the phase of the motor 304 in the radio wave correction timepiece 100 according to the first embodiment.

  In FIG. 6A, the detection sensitivity and the detection level of the optical sensor 214 and the phase of the motor 304 when the detection position in the optical sensor 214 and the position where the detection hole 305a and the detection hole 302a completely overlap coincide with each other. It shows the relationship with As shown in FIG. 6A, FIG. 6B and FIG. 6C, the detection sensitivity of the light sensor 214 at the time of normal hand movement (hand movement setting threshold) is lower than the first sensitivity and higher than the second sensitivity. It is set to.

  The first sensitivity may be, for example, the highest detection sensitivity among detection sensitivities that can be set in the detection sensitivity of the light sensor 214. The second sensitivity may be, for example, the lowest detection sensitivity among detection sensitivities that can be set in the detection sensitivity of the light sensor 214. The third sensitivity, which is a hand movement setting threshold value, can be a detection sensitivity intermediate between the first sensitivity and the second sensitivity.

  In the radio wave correction timepiece 100, the third sensitivity is also set at the time of forced pointer position correction that forcibly corrects the position of the pointer 106 according to a predetermined input operation to the operation unit 104 in addition to the normal hand movement. The reference position is detected in the state. At the time of forced pointer position correction, for example, state determination is performed at two specific places to detect a reference position. In this case, the two specific points can be, for example, the reference position and the steering position that have already been set. Alternatively, in the case of the forcible pointer position correction, for example, the pointer wheel 301 is fast-forwarded to a position immediately before (for example, 20 steps before) the position to be subjected to state determination, and the state determination is performed one step at a time thereafter Alternatively, the reference position may be detected.

  As shown in FIG. 6A, in the state where the detection position in the optical sensor 214 and the position where the detection hole 305a and the detection hole 302a completely overlap are in agreement, a multiple step number (for example, two steps) dark state After detection, a multiple step number (for example, two steps) bright state can be detected. Therefore, the steering position X-1 for detecting the dark state and the reference position X + 1 for detecting the light state may be set with the switching position X at which the dark state and the light state switch. it can.

  On the other hand, when the above deviation occurs, the change in the aperture ratio from the dark state to the bright state and from the bright state to the dark state is the highest in the bright state. Instead of being in the shape of a mountain centered on the position (a mountain indicated by reference numeral 610 in FIG. 6A), it is in a biased state. In the first embodiment, the switching position X is specified based on the aperture ratio in the range 611 a of the mountain shape 611 which gradually falls from the position of 100% of the aperture ratio in the range 610 a indicated by the mountain shape 610.

  In such a case, the difference between the dark state detection level and the bright state detection level at the switching position X is remarkable, and the maximum value of the detection level is low. For example, as shown in FIG. 6B and FIG. If the steering position X-1 and the reference position X + 1 are set based on the position X, the bright state can not be detected at the reference position X + 1 in the state where the second sensitivity is set.

  Since the reference position can not be set if the bright state can not be detected at the reference position X + 1 with the second sensitivity set, such a drive mechanism (movement) 209 is a nonstandard item from the manufacturing line It is excluded and the yield is reduced.

  Therefore, as described above, the radio correction clock 100 according to the first embodiment specifies the switching position X at which the dark state is switched to the bright state, and the detection value (light reception amount) of the light sensor 214 at the switching position X is the maximum value. In other words, by determining whether or not it is a peak value, even if the maximum value of the actual aperture ratio does not reach 100% aperture ratio when the drive mechanism (movement) 209 is assembled as designed, The steering position and the reference position that can be detected can be set.

  The determination as to whether the value is a peak value sets the detection sensitivity of the optical sensor 214 to a peak detection sensitivity (sensitivity peak detection threshold) lower than the second sensitivity. The peak detection sensitivity (sensitivity peak detection threshold) is a sensitivity that detects only the highest detection level to determine whether the detection value (light reception amount) of the optical sensor 214 at the switching position X is the maximum value, ie, the peak value. Set to

  Specifically, in the radio wave correction timepiece 100 of the first embodiment, when the detection value (light reception amount) of the light sensor 214 at the switching position X switching from dark state to light state is the maximum value at the time of reference position setting operation. , Setting the switching position X as a reference position. Then, a position X-2 two steps before the reference position X is set as a steering position for detecting a dark state (see the mark * in FIG. 6C). Thus, the steering position and the reference position can be reliably detected.

  Further, in the radio wave correction timepiece 100 according to the first embodiment, when the detection value (light reception amount) of the light sensor 214 at the switching position X is not the maximum value, the steering position X-1 and the reference position based on the switching position X Set X + 1. As a result, the steering position and the reference position can be reliably detected without being affected by the built-in variation.

(Processing procedure of reference position setting operation)
Next, the processing procedure of the reference position setting operation performed by the radio-wave correction timepiece 100 according to the first embodiment of the present invention will be described. FIG. 7A and FIG. 7B are flowcharts showing the processing procedure of the reference position setting operation performed by the radio wave correction watch 100 of the first embodiment. The processes illustrated in the flowcharts of FIGS. 7A and 7B are executed when a predetermined input operation on the operation unit 104 is received.

  7A and 7B, the processing procedure of the reference position setting operation for the hand wheel 301 corresponding to the hour hand 106a corresponding to the light sensor 214 will be described, but the minute hand 106b corresponding to the light sensor 215 and the light sensor 216 The reference position can be set for the second hand 106c to be processed by performing the same process as the hour hand 106a.

  In the flowcharts of FIGS. 7A and 7B, first, the detection sensitivity of the light sensor 214 is set to the first sensitivity (step S701), and the motor 304 is moved one step (step S702). In step S702, by driving the motor 304 by one step, the pointer wheel 301 is rotated (turned) by one step.

  Next, with the detection sensitivity of the light sensor 214 set to the first sensitivity, based on the output value of the light sensor 214 (light receiving element 214b) at the position where the pointer wheel 301 is rotated (turned) by one step. It is determined whether a dark state is detected (step S703). In step S703, when the dark state is not detected (step S703: No), it is determined whether the time pointing hand 106 which is the setting object of the reference position has made one rotation (step S704).

  In step S704, when the time indication hand 106 for which the reference position is to be set does not make one revolution (step S704: No), the process returns to step S702, and further the motor 304 is driven for one step to drive the pointer wheel 301 Rotate (turn) the step. Step S704: In the case of No, as a result of performing the processing from Step S702 to Step S704 again, if the time pointing hand 106 for which the reference position is to be set has made one turn (Step S704: Yes), the process proceeds to Step S724. . In step S704, it may be determined whether or not the time pointing hand 106 for which the reference position is to be set is in two or more turns.

  On the other hand, when the dark state is detected in step S703 (step S703: Yes), it is determined whether the time pointing hand 106 for which the reference position is to be set has made one turn (step S705). In step S705, it may be determined whether or not the time pointing hand 106 for which the reference position is to be set is in two or more turns. If it is determined in step S705 that the time specifying hand 106 for which the reference position is to be set has made one turn (step S705: YES), the process proceeds to step S724.

  In step S705, when the time pointing hand 106 for which the reference position is to be set does not make one rotation (step S705: No), the motor 304 is driven by one step (step S706). In step S706, the pointer wheel 301 is rotated (turned) by one step by driving the motor 304 by one step. Then, based on the output value of the light sensor 214 (light receiving element 214b) at the position where the pointer wheel 301 is rotated (turned) by one step, it is determined whether the dark state is detected (step S707).

  When the dark state is not detected in step S707 (step S707: No), the process proceeds to step S710. On the other hand, when the dark state is detected in step S707 (step S707: Yes), the motor 304 is driven for one step (step S708). Then, based on the output value of the light sensor 214 (the light receiving element 214b) at the position where the pointer wheel 301 is rotated (turned) by one step, it is determined whether the bright state is detected (step S709). When the bright state is not detected in step S709 (step S709: No), the process proceeds to step S724.

  When the bright state is detected in step S709 (step S709: Yes), the position at which the bright state is detected is set as the switching position X, and the information on the switching position X is stored in the ROM 203b or the like (step S710). Then, was the motor 304 driven by one step (step S711), and was the bright state detected based on the output value of the optical sensor 214 (light receiving element 214b) at the position where the pointer wheel 301 rotated (rotated) by one step? It is determined whether or not (step S712). When the bright state is not detected in step S712 (step S712: No), the process proceeds to step S724. On the other hand, when the bright state is detected in step S712 (step S712: Yes), the position at which the bright state is detected is set as the reference position X + 1, and information on the reference position X + 1 is stored in the ROM 203b or the like (step S713).

  Next, the detection sensitivity of the light sensor 214 is set to the second sensitivity (step S714), and the motor 304 is driven until the pointer wheel 301 is positioned at the position X-1 (step S715). In step S715, for example, as described above, the pointer wheel 301 is positioned at the position X-1 by rotating the motor 304 forward at a speed faster than that during normal hand movement and by fast-forwarding the pointer wheel 301. Alternatively, in step S715, for example, after rotating the motor 304 in reverse by three steps or more, the pointer wheel 301 may be positioned at the position X-1 by rotating the motor 304 forward. The pointer wheel 301 may be positioned at the position X-1 while detecting the dark state each time the motor 304 is rotated forward.

  Then, based on the output value of the light sensor 214 (the light receiving element 214b) in the state where the pointer wheel 301 is positioned at the position X-1, it is determined whether the dark state is detected (step S716). In step S716, when the dark state is not detected (step S716: No), the process proceeds to step S724.

  On the other hand, when the dark state is detected in step S716 (step S716: Yes), the motor 304 is driven until the pointer wheel 301 is positioned at the switching position X (step S717). In step S 717, for example, as described above, the pointer wheel 301 is positioned at the switching position X by rotating the motor 304 two steps forward at a speed faster than that during normal hand movement and fast-forwarding the pointer wheel 301. Alternatively, in step S717, the pointer wheel 301 may be positioned at the switching position X by, for example, rotating the motor 304 two steps forward at the same speed as normal movement.

  Next, based on the output value of the light sensor 214 (the light receiving element 214b) in the state where the pointer wheel 301 is positioned at the switching position X, it is determined whether the switching position X is the maximum value (step S718). In step S718, the pointer wheel 301 is positioned at the position X-1, the switching position X, and the reference position X + 1, and the optical sensor 214 at the switching position X is based on the detection value of the optical sensor 214 in the state positioned at each position. Whether or not the switching position X is the maximum value can be determined depending on whether the detected value is larger than the detection value of the optical sensor 214 at the position X-1 and the reference position X + 1.

  In step S718, when the switching position X is a local maximum (step S718: Yes), the switching position X is set (confirmed) as a reference position for determining the bright state, and two steps before the switching position X The position X-2 is set to the steering position for determining the dark state (step S719), and the process proceeds to step S725. In step S719, for example, information on the reference position X and the steering position X-2 can be set by storing the information in the ROM 203b or the like.

  On the other hand, when the switching position X is not the maximum value in step S718 (step S718: No), the detection sensitivity of the optical sensor 214 is set to the second sensitivity (step S720). The motor 304 is driven (step S721). Then, based on the output value of the light sensor 214 (the light receiving element 214b) in the state where the pointer wheel 301 is positioned at the position X + 1, it is determined whether the bright state is detected (step S722). In step S722, when the bright state is not detected at the position X + 1 (step S722: No), the process proceeds to step S724.

  On the other hand, when the bright state is detected at position X + 1 in step S722 (step S722: Yes), the position X + 1 is set (determined) as a reference position for determining the bright state, and two steps before position X + 1 Is set to the steering position for determining the dark state (step S723), and the process proceeds to step S725. In step S723, for example, information on position X + 1 and steering position X-1 can be set by storing information in ROM 203b or the like.

  In step S724, "NG process" is performed (step S724). In step S 724, for example, the motor 304 is driven to rotate (turn) the date wheel so as to change the date indicated by the date wheel to a date that is earlier than the date at the start of the reference position setting operation. Perform “NG process”.

  In step S725, an "OK process" is performed (step S725). In step S725, for example, the motor 304 is driven to rotate (turn) the date wheel so as to change the date indicated by the date wheel to a date advanced from the date at the start of the reference position setting operation. "OK processing" is performed.

  Specifically, for example, when the date at the start of the reference position setting operation is "31" days, in "NG process" and "OK process", "1" day when the setting of the reference position is successful. If the setting of the reference position fails, position the date wheel at the position indicating “30” day. By doing this, when the setting of the reference position is successful, the setting of the reference position of the date wheel becomes unnecessary.

  Alternatively, in step S725, for example, the motor 304 is driven to position the pointer wheel 301 for which the reference position is to be set at a predetermined position determined as a position indicating that the setting of the reference position is successful. You may perform "OK process" by. Specifically, the predetermined position determined in advance is 0: 0: 0, and when the correction amount is set in advance, the motor 304 is driven in advance by the correction amount from the reference position X + 1, and the predetermined position is determined in advance. The time pointer 106 can be moved to the predetermined position. In this way, when "OK processing" is completed, setting the time to 0:00:00 on one day makes it unnecessary to set the time after that, and immediately use the clock that has been successfully adjusted as the normal state. be able to.

  In the first embodiment described above, the state determination is performed one step at a time after the reference position setting operation is started, and the light state is detected twice continuously after the dark state is detected twice continuously. Is detected, but it is not limited to this method. For example, if it is possible to grasp in advance the approximate position where the bright state is detected twice consecutively after detecting the dark state twice continuously before starting the reference position setting operation due to the built-in conditions etc. The pointer wheel 301 is fast-forwarded to a position immediately before the approximate position (for example, 20 steps before), and the state determination is performed step by step from the immediately preceding position, and a dark state is detected twice consecutively The position at which the state is detected twice consecutively may be detected.

Second Embodiment
Next, the configuration of a radio-controlled timepiece according to a second embodiment of the present invention will be described. In the second embodiment, the same parts as those in the first embodiment described above are denoted by the same reference numerals, and the description will be omitted.

  In the first embodiment described above, the switching position X at which the dark state is switched to the light state is specified, and based on the switching position X, the steering position at which the dark state is detected during normal movement and the normal movement The reference position for detecting the bright state was set. On the other hand, the radio-wave-corrected timepiece that realizes the timepiece according to the second embodiment of the present invention specifies the switching position Y at which the light state is switched to the dark state, and based on the switching position Y A steering position for detecting a state and a reference position for detecting a bright state at the time of normal movement are set.

(Detection sensitivity and relationship between detection level and phase)
FIGS. 8A, 8 B and 8 C are explanatory diagrams showing the relationship between the detection sensitivity and detection level of the light sensor 214 and the phase of the motor 304 in the radio wave correction timepiece 100 of the second embodiment. In the second embodiment, the switching position Y is specified based on the aperture ratio in the range 811 a which gradually falls from the position of 100% of the aperture ratio in the range 810 a indicated by the mountain shape 810.

  In such a case, since the difference between the dark state detection level and the bright state detection level at the switching position Y is remarkable and the maximum value of the detection level is low, for example, as shown in FIG. 8B and FIG. When the steering position Y + 1 and the reference position Y-1 are set based on the position Y, the bright state can not be detected at the steering position Y + 1 in the state where the second sensitivity is set.

  Therefore, the radio correction clock 100 according to the second embodiment specifies the switching position Y at which the light state switches to the dark state in the reference position setting operation, and the detection value (light reception amount) of the light sensor 214 at the switching position Y is maximal. Even if the maximum value of the actual aperture ratio does not reach 100% of the aperture ratio in the state where the drive mechanism (movement) 209 is assembled as designed, by determining whether the value is the peak value or not, It is possible to set a steering position and a reference position that can be reliably detected.

  Specifically, radio wave correction watch 100 of the second embodiment drives and controls motor 304 based on the amount of light received by light receiving element 214b at the time of reference position setting operation, and, for example, every time motor 304 is driven one step. State determination is performed to determine whether the state is bright or dark. Then, the control unit 401 sets the detection sensitivity of the light sensor 214 to the first sensitivity higher than the sensitivity at the time of normal hand movement, and based on the result of the state determination in the state set to the first sensitivity. The switching position Y to switch from dark to dark is identified.

  Next, when the control unit 401 detects the switching position Y, the position Y-1 one step before the switching position Y is in the dark state with the detection sensitivity of the light sensor 214 set to the first sensitivity. Determine whether it is in the bright state. At this time, for example, the control unit 401 positively rotates the motor 304 at a speed faster than that of normal hand movement, and fast-forwards the pointer wheel 301, thereby positioning the pointer wheel 301 at the position Y-1.

  Alternatively, the control unit 401 may position the pointer wheel 301 at the position Y-1 by, for example, rotating the motor 304 in the reverse direction and rotating the pointer wheel 301 in the direction opposite to that during normal hand movement. When the motor 304 is reversely rotated and the pointer wheel 301 is rotated in the reverse direction to that of normal hand movement, reverse rotation to an extra position Y-1 (for example, Y-5 position) taking backlash into consideration Then, it is rotated forward to position Y-1.

  Then, when the position Y-1 is in the bright state, the position Y-1 is specified as the reference position. Thereafter, the control unit 401 stores information on the specified reference position Y-1 in the storage unit 401a. The information on the reference position Y-1 can be generated based on the information that can specify the position of the pointer wheel 301 at the time when it is determined to be in the dark state after being determined to be in the bright state. Thereafter, with the detection sensitivity of the light sensor 214 set to the second sensitivity, the control unit 401 positions the pointer wheel 301 at a position Y + 1 one step after the switching position Y, and determines whether the position Y + 1 is dark Determine if

  Next, after determining whether or not the pointer wheel 301 is in the dark state with the pointer wheel 301 positioned at the position Y + 1, the control unit 401 rotates the motor 304 to position the pointer wheel 301 at the reference position Y-1, and It is determined whether the detection value (light reception amount) of the light sensor 214 at the position Y-1 is a maximum value, that is, a peak value. At this time, the motor 304 may be rotated at a speed (fast feed) faster than that at the time of normal movement or at the normal speed. Further, at this time, the motor 304 may be rotated forward or backward.

  Whether the detection value of the optical sensor 214 is the maximum value is whether the detection value of the optical sensor 214 in the state where the pointer wheel 301 is positioned at the reference position Y-1 is larger than the position Y-2 and the switching position Y It can be judged by whether or not it is. The light receiving element 214b of the light sensor 214 receives the light emitted from the light emitting element 214a only in a specific range during one rotation of the pointer wheel 301. Therefore, the maximum value of the detection value of the light sensor 214 in this light reception range is the maximum value of the detection value (light reception amount) of the light sensor 214.

  When the detection value (light reception amount) of the light sensor 214 at the reference position Y-1 is the maximum value, that is, when the light sensor 214 detects a peak value at the reference position Y-1, the control unit 401 Y-1 is set (confirmed) as a reference position for determining the bright state. Further, when the light sensor 214 detects a peak value at the reference position Y-1, the control unit 401 determines a dark state at a position Y + 1 after a predetermined number of steps (for example, two steps) from the reference position Y-1. Set to the steering position of. The control unit 401 stores information on the set reference position Y-1 and steering position Y + 1 in the storage unit 401a.

  On the other hand, when the detection value (light reception amount) of the light sensor 214 at the reference position Y-1 is not the maximum value, the control unit 401 sets the detection sensitivity of the light sensor 214 to the second sensitivity and rotates the motor 304. The pointer wheel 301 is positioned at position Y-2. Then, with the detection sensitivity of the light sensor 214 set to the second sensitivity, it is determined whether or not the position Y-2 is in the bright state. When the position Y-2 is in the bright state with the detection sensitivity of the light sensor 214 set to the second sensitivity, the position Y-2 is set (confirmed) as the reference position for determining the bright state. . When the position Y-2 is in the bright state with the detection sensitivity of the light sensor 214 set to the second sensitivity, the position Y after a predetermined number of steps (for example, 2 steps) from the position Y-2 is Set to the steering position to determine the dark state. Thereafter, the control unit 401 stores information on the set reference position Y-2 and steering position Y in the storage unit 401a.

  As described above, the radio wave correction timepiece 100 of the second embodiment performs one step from the switching position Y when the detection value (light reception amount) of the optical sensor 214 at the switching position Y at which the light state switches to the dark state is the maximum value. The front position Y-1 is set as the reference position, and the position Y + 1 two steps after the reference position Y-1 is set as the steering position for detecting the dark state (see the mark * in FIG. 8C). Thus, the steering position and the reference position can be reliably detected.

  Further, in the radio wave correction timepiece 100 of the second embodiment, if the detection value (light reception amount) of the light sensor 214 at the position Y-1 one step before the switching position Y is not the maximum value, the position is set to the position Y-1. By setting the steering position Y and the reference position Y-2 on the basis, the steering position and the reference position can be reliably detected without being influenced by the built-in variation.

(Processing procedure of reference position setting operation)
Next, the procedure of the reference position setting operation performed by the radio-wave correction timepiece 100 according to the second embodiment of the present invention will be described. FIG. 9A and FIG. 9B are flowcharts showing the processing procedure of the reference position setting operation performed by the radio wave correction watch 100 of the second embodiment. The processes illustrated in the flowcharts of FIGS. 9A and 9B are executed when a predetermined input operation on the operation unit 104 is received.

  9A and 9B, the processing procedure of the reference position setting operation for the hand wheel 301 corresponding to the hour hand 106a corresponding to the light sensor 214 will be described, but the minute hand 106b corresponding to the light sensor 215 and the light sensor 216 The reference position can be set for the second hand 106c to be processed by performing the same process as the hour hand 106a.

  In the flowcharts of FIGS. 9A and 9B, first, the detection sensitivity of the light sensor 214 is set to the first sensitivity (step S901), and the motor 304 is moved one step (step S902). In step S902, by driving the motor 304 by one step, the pointer wheel 301 is rotated (turned) by one step.

  Next, with the detection sensitivity of the light sensor 214 set to the first sensitivity, based on the output value of the light sensor 214 (light receiving element 214b) at the position where the pointer wheel 301 is rotated (turned) by one step. It is determined whether a bright state has been detected (step S903). In step S903, when the bright state is not detected (step S903: No), the process proceeds to step S902, and the motor 304 is further moved by one step.

  On the other hand, when the bright state is detected in step S903 (step S903: Yes), the motor 304 is driven by one step (step S904). In step S904, by driving the motor 304 by one step, the pointer wheel 301 rotates (turns) by one step. Then, based on the output value of the light sensor 214 (light receiving element 214b) at the position where the pointer wheel 301 is rotated (turned) by one step, it is determined whether the dark state is detected (step S905). In step S905, when the dark state is not detected (step S905: No), the process proceeds to step S904, and the motor 304 is further driven by one step.

  When the dark state is detected in step S905 (step S905: Yes), the position at which the dark state is detected, that is, the position at which the light state is switched to the dark state is the switching position Y, and the information on the switching position Y is the ROM 203b or the like. (Step S906). Then, the motor 304 is driven until the pointer wheel 301 is positioned at the position Y-1 (step S907). In step S 907, for example, as described above, the pointer wheel 301 is positioned at the position Y by forward rotating the motor 304 at a speed higher than that of normal hand movement and fast-forwarding the pointer wheel 301. Alternatively, in step S 907, for example, the handwheel 301 may be positioned at the position Y by rotating the motor 304 in the forward direction after rotating the motor 304 three or more steps in reverse.

  Next, it is determined whether the bright state is detected based on the output value of the light sensor 214 (the light receiving element 214b) in the state where the pointer wheel 301 is positioned at the position Y-1 (step S908). When the bright state is not detected in step S908 (step S908: No), the process proceeds to step S920. On the other hand, when the bright state is detected in step S908 (step S908: Yes), the information on the reference position Y-1 is stored in the ROM 203b or the like with the position at which the bright state is detected as the reference position Y-1. S 909).

  Next, the detection sensitivity of the light sensor 214 is set to the second sensitivity (step S 910), and the motor 304 is driven until the pointer wheel 301 is positioned at position Y + 1 one step after the switching position Y (step S 911) . In step S911, for example, as described above, the pointer wheel 301 is positioned at the position Y-1 by positively rotating the motor 304 at a speed higher than that of normal hand movement and fast-forwarding the pointer wheel 301. Alternatively, in step S911, for example, after rotating the motor 304 backward by three steps or more, the pointer wheel 301 may be positioned at the position Y + 1 by rotating the motor 304 forward.

  Then, based on the output value of the light sensor 214 (the light receiving element 214b) in the state where the pointer wheel 301 is positioned at the position Y + 1, it is determined whether the dark state is detected (step S912). In step S912, when the dark state is not detected (step S912: No), the process proceeds to step S920.

  On the other hand, when the dark state is detected in step S912 (step S912: Yes), the motor 304 is driven until the pointer wheel 301 is positioned at the position Y-1 (step S913). In step S913, for example, as described above, the pointer wheel 301 is positioned at the position Y-1 by rotating the motor 304 two steps forward at a speed faster than that of normal hand movement and by fast-forwarding the pointer wheel 301 . Alternatively, in step S913, for example, the motor 304 may be forwardly rotated by two steps at the same speed as normal movement, and the pointer wheel 301 may be positioned at the position Y-1.

  Then, based on the output value of the light sensor 214 (the light receiving element 214b) in the state where the pointer wheel 301 is positioned at the position Y-1, it is determined whether the position Y-1 is the maximum value (step S914) . In step S914, the pointer wheel 301 is positioned at the position Y-2, the position Y-1, and the position Y, and the light sensor 214 at the position Y-1 is based on the detection values of the light sensor 214 in the state positioned at each position. Whether or not the position Y-1 is the maximum value can be determined depending on whether or not the detected value of is larger than the detection value of the light sensor 214 at the position Y-2 and the position Y.

  When the position Y-1 is the maximum value in step S914 (step S914: Yes), the position Y-1 is set (confirmed) as a reference position for determining the bright state, and from the position Y-1 The position Y + 1 after two steps is set as the steering position for determining the dark state (step S915), and the process proceeds to step S921. In step S915, for example, information on the reference position Y-1 and the steering position Y + 1 can be set by storing the information in the ROM 203b or the like.

  On the other hand, when the position Y-1 is not the maximum value in step S914 (step S914: No), the detection sensitivity of the optical sensor 214 is set to the second sensitivity (step S916), and the pointer wheel 301 is at the position Y-2. The motor 304 is driven until it is positioned (step S 917). And based on the output value of the optical sensor 214 (light receiving element 214b) in the state which positioned the pointer wheel 301 in position Y-2, it is determined whether the bright state was detected (step S918). In step S918, when the bright state is not detected at the position Y-2 (step S918: No), the process proceeds to step S920.

  On the other hand, when the bright state is detected at position Y-2 in step S918 (step S918: Yes), the position Y-2 is set (determined) as a reference position for determining the bright state, and The position Y after two steps from -2 is set as the steering position for determining the dark state (step S919), and the process proceeds to step S921. In step S919, for example, information on the reference position Y-2 and the steering position Y can be set by storing the information in the ROM 203b or the like.

  In step S920, "NG process" is performed as in step S724 in FIG. 7B described above (step S920). In step S921, "OK processing" is performed as in step S725 in FIG. 7B described above (step S921).

  As described above, the radio wave correction watch 100 according to this embodiment includes the pointer wheel 301 rotatable about its axis, the motor 304 coupled to the pointer wheel 301 and rotating the pointer wheel 301, and the pointer wheel 301 Detection wheel 305 which can rotate around the axis in conjunction with the rotation of the sensor, a detection hole 305a which penetrates the detection wheel 305 in the axial direction, and a detection position on the movement locus of the detection hole 305a with the rotation of the detection wheel 305 Light sensor 214 (215, 216) including a light emitting element 214a for emitting light and a light receiving element 214b disposed opposite to the light emitting element 214a with the detection wheel 305 interposed therebetween, and the light receiving element 214b And a control unit 401 that drives and controls the motor 304 based on the amount of light received. The control unit 401 determines the state every time the motor 304 is driven one step, and the switching position is determined based on the result of the state determination in the state where the detection sensitivity of the optical sensor 214 (215, 216) is set to the first sensitivity. Identify.

  For example, in the radio wave correction watch 100 according to the embodiment of the present invention, the control unit 401 performs state determination each time the motor 304 is driven one step, and the detection sensitivity of the optical sensor 214 (215, 216) is set to the first. Based on the result of the state determination in the state set to the sensitivity, the switching position to switch from the dark state to the bright state is specified. In this case, the control unit 401 causes the position one step after the identified switching position to be in the bright state in which the detection sensitivity of the optical sensor 214 (215, 216) is set to the first sensitivity, and the switching position When the detection sensitivity of the light sensor 214 (215, 216) is set to the second sensitivity, the position before one step is dark, and the light reception amount at the switching position is the maximum value. At the time of hand movement, the position of the pointer wheel 301 is determined by determining whether the position a predetermined number of steps (for example, 2 steps) before the switching position is dark and the switching position is light. It is characterized by detecting.

  Alternatively, for example, the radio wave correction timepiece 100 according to the embodiment of the present invention performs the state determination every time the control unit 401 drives one step, and the dark state where the light reception amount is less than the predetermined amount is the first state. It is determined that it is a state, and a state determination is performed to determine that a bright state in which the light reception amount is equal to or more than a predetermined amount is the second state, and the detection sensitivity of the optical sensor 214 (215, 216) Based on the result of the state determination in the state set to, the switching position to switch from the bright state to the dark state is specified. In this case, the control unit 401 causes the position one step after the specified switching position to be in a dark state with the detection sensitivity of the light sensor 214 (215, 216) set to the first sensitivity, and the switching position When the detection sensitivity of the optical sensor 214 (215, 216) is set to the second sensitivity, the position one step before is brighter, and the light reception amount at the position one step before the switching position is the maximum. If it is a value, is it normal that the position after a predetermined number of steps (for example, 2 steps) from the switching position is dark and that the position one step before the switching position is bright from the switching position? It is characterized in that the position of the pointer wheel 301 is detected by judging whether or not it is not.

  According to the radio wave correction watch 100 of the embodiment according to the present invention, the positional relationship of the gears 302 constituting the pointer wheel 301 and the wheel train 303, the arrangement direction of the motor 304 (motor coil), and the motor 304 (motor Even if the aperture ratio becomes smaller than the expected value at the time of design due to the built-in variation of each component of the drive mechanism (movement) 209, such as the initial phase of the pulse signal output to the coil) It is possible to set a reference position that can be detected well and a steering position that can accurately detect a dark state. As a result, the position of the pointer wheel 301 in each radio-controlled timepiece 100 can be accurately detected without being affected by the installation variation of each radio-controlled timepiece 100.

  And thereby, the positional relationship of the gear 302 which comprises the pointer wheel 301 and the gearwheel ring 303, the arrangement direction of the motor 304 (motor coil), and the initial phase of the pulse signal output to the motor 304 (motor coil) from an electronic circuit part. The drive mechanism (movement) 209 can be assembled without being restricted by the incorporation of the components constituting the drive mechanism (movement) 209, etc., thereby reducing the burden on the operator when manufacturing the radio-controlled timepiece 100. be able to.

  Further, in the radio wave correction watch 100 according to the embodiment of the present invention, the position one step after the specified switching position is bright when the detection sensitivity of the optical sensor 214 (215, 216) is set to the first sensitivity. Even when the state is set and the position one step before the switching position is in the dark state with the detection sensitivity of the light sensor 214 (215, 216) set to the second sensitivity, the light reception amount at the switching position is If it is not the maximum value, the position before the switching position by a predetermined number of steps (for example, 2 steps) is dark during normal movement, and after the switching position by a predetermined number of steps (for example, 1 step) It is characterized in that the position of the pointer wheel 301 is detected by judging whether or not the position is in the bright state.

  According to the radio-wave correction timepiece 100 of the embodiment according to the present invention, when the light reception amount at the switching position is not the maximum value, the light is bright at a position before the switching position by a predetermined number of steps and at a position after a predetermined number of steps from the switching position. It can be determined whether it is a state or a dark state. Thereby, as in the case where the aperture ratio is as designed at the time of design, when there is a margin in the setting range of the reference position, the position at the very boundary between the bright state and the dark state is set as the reference position. Can be set as the reference position without fail.

  Similarly, in the radio wave correction watch 100 according to the embodiment of the present invention, the position one step after the specified switching position sets the detection sensitivity of the light sensor 214 (215, 216) to the first sensitivity. Even when the dark state occurs and the position one step before the switching position is bright with the detection sensitivity of the light sensor 214 (215, 216) set to the second sensitivity, the amount of light received at the switching position If the value is not the maximum value, during normal movement, the predetermined number of steps (for example, two steps before the switching position) before the position before the switching position is bright and the switching position Further, the position of the pointer wheel 301 is detected by determining whether the position after a predetermined number of steps (for example, one step) is dark.

  According to the radio-wave correction timepiece 100 of the embodiment according to the present invention, when the light reception amount at the switching position is not the maximum value, the position and the switching position a predetermined number of steps before the position one step before the switching position It can be determined whether the state is bright or dark at a position after a predetermined number of steps. Thereby, as in the case where the aperture ratio is as designed at the time of design, when there is a margin in the setting range of the reference position, the position at the very boundary between the bright state and the dark state is set as the reference position. Can be set as the reference position without fail.

  In the radio wave correction watch 100 according to the embodiment of the present invention, the control unit 401 adjusts at least one of the light emission intensity of the light emitting element 214a and the light receiving sensitivity of the light receiving element 214b in the reference position setting operation. It is characterized in that the detection sensitivity of (215, 216) is set.

  According to the radio wave correction watch 100 of the embodiment according to the present invention, the light sensor 214 (215, 216) is not influenced by variations in detection sensitivity of the light sensor 214 (215, 216) for each of the radio wave correction watch 100. Can be set for each radio-wave correction watch 100, and the switching position X can be specified with high accuracy for each radio-wave correction watch 100. As a result, the position where the bright state can be reliably set can be set as the reference position. And thereby, the electric wave correction watch 100 which shows exact time can be provided.

  Moreover, according to the radio wave correction watch 100 of the embodiment according to the present invention, the detection sensitivity of the light sensor 214 (215, 216) due to variation in input current to the light sensor 214 (215, 216) or change with time. Can be set for each of the radio wave correction timepieces 100 and the switching position X can be specified with high accuracy for each of the radio wave correction timepieces 100. Thus, it is possible to provide the radio correction clock 100 that always indicates the correct time.

  Further, the radio-wave correction watch 100 according to the embodiment of the present invention includes a clocking function (clocking means) for clocking time, and the control unit 401 is lower than the first sensitivity at the time of normal hand movement and It is characterized in that the position of the pointer wheel 301 is detected using a third sensitivity which is equal to or higher than the second sensitivity.

  According to the radio-wave correction watch 100 of the embodiment according to the present invention, the position of the indicator wheel 301 supporting the time indication hand 106 (the hour hand 106a, the minute hand 106b or the second hand 106c) is set to the reference position X + 1 set with high accuracy. It can control based on it. Thus, it is possible to provide the radio correction clock 100 that indicates the correct time. When setting the reference positions of the hour hand 106a, the minute hand 106b, and the second hand 106c, different sensitivities may be used for the hour hand 106a, the minute hand 106b, and the second hand 106c, respectively.

  Further, the radio wave correction watch 100 according to the embodiment of the present invention is connected to the date driving wheel connected to the pointer wheel 301 and capable of rotating around the axis in conjunction with the rotation of the pointer wheel 301, and connected to the date driving wheel. The date indicator may be provided with a date indicator. Then, in such a radio wave correction watch 100, when the reference position is set as a result of performing the reference position setting operation, the control unit 401 controls the driving of the motor 304 to rotate the date feeder. Change the date indicated by the date wheel to a date advanced from the date at the start of the reference position setting operation, and if the reference position setting operation fails and the reference position is not set, drive control the motor 304 By rotating the date feeder, it is possible to change the date indicated by the date feeder to a date that is earlier than the date at the start of the reference position setting operation.

  According to such a radio wave correction watch 100, even when no pointer is attached to the pointer wheel 301 in the manufacturing process of the watch, it is possible to indicate whether the setting of the reference position has succeeded or failed. Thus, the manufacturer of the radio-controlled timepiece 100 can determine whether the setting of the reference position has succeeded before attaching the pointer to the pointer wheel 301.

  Then, when the setting of the reference position fails, it is possible to take measures such as re-assembling the assembly of the radio wave correction watch 100 before completion, and after the assembly of the radio wave correction watch 100 is completed. Compared with the case where the success or failure of the setting of the reference position is confirmed, the burden on the operator at the time of manufacturing the radio-controlled timepiece 100 can be reduced.

  As described above, the watch according to the present invention is useful for a watch that displays the time based on the position of the specified pointer, and in particular, a watch that corrects the display time based on the time information included in the received radio wave. Is suitable.

DESCRIPTION OF SYMBOLS 100 radio wave correction clock 106 time point hand 106a hour hand 106b minute hand 106c second hand 214, 215, 216 optical sensor 214a light emitting element 214b light receiving element 301 pointer wheel 304 motor 304a rotor 305 detection car 305a detection hole 401 control part 401a storage part

Claims (10)

A pointer wheel that can rotate around its axis,
A motor coupled to the pointer wheel for rotating the pointer wheel;
A detection vehicle rotatable about an axis in conjunction with rotation of the pointer wheel;
A detection hole penetrating the detection vehicle in the axial direction;
A light emitting element for emitting light to a detection position on a movement locus of the detection hole according to the rotation of the detection car, and a light receiving element disposed opposite to the light emitting element with the detection car interposed therebetween Light sensor,
Control means for driving and controlling the motor;
Equipped with
The control means
Each time the motor is driven by one step, state determination is performed to determine whether the first state or the second state is based on the amount of light received by the light receiving element.
Specify the switching position at which the first state and the second state are switched based on the result of the state determination in the state where the detection sensitivity of the optical sensor is set to the first sensitivity higher than the sensitivity at the time of normal movement And
The position one step after the specified switching position is in the first state when the detection sensitivity of the light sensor is set to the first sensitivity, and the position one step before the switching position is the light It is determined whether or not to be in the second state with the detection sensitivity of the sensor set to the second sensitivity lower than the sensitivity at the time of normal hand movement,
When the light receiving amount at the switching position or the position one step before the switching position is a maximum value, the result of the state determination at the position different by a predetermined number of steps from the switching position and the switching position Alternatively, it is possible to detect the position of the pointer wheel by judging whether or not the result of the state determination at the position one step before the switching position is different. The control means
Each time the motor is driven by one step, based on the amount of light received by the light receiving element, it is determined that the bright state in which the amount of light received is equal to or greater than a predetermined amount is the first state, and the amount of light received Performing a state determination to determine that the second state is the dark state which is less than
A switching position to switch from dark state to bright state is specified based on the result of the state determination in the state where the detection sensitivity of the light sensor is set to the first sensitivity,
The position one step after the specified switching position is in the bright state when the detection sensitivity of the light sensor is set to the first sensitivity, and the position one step before the switching position is the position of the light sensor It is determined whether or not a dark state occurs in a state where the detection sensitivity is set to the second sensitivity,
When the amount of light received at the switching position is the maximum value, it is determined whether or not the position before the switching position by a predetermined number of steps is dark and the switching position is the bright state during normal movement. The watch according to claim 1, wherein the position of the pointer wheel is detected by performing the setting. The control means
During normal movement, it is possible to detect the position of the pointer wheel by determining whether the position two steps before the switching position is dark and the switching position is bright. A watch according to claim 2, characterized in that. The control means
When the light reception amount at the switching position is not the maximum value, the position before the switching position by a predetermined number of steps is dark during normal movement, and the position after the switching position by a predetermined number of steps after the switching position is bright The timepiece according to claim 2 or 3, wherein the position of the pointer wheel is detected by determining whether or not The control means
Each time the motor is driven by one step, based on the amount of light received by the light receiving element, it is determined that the dark state in which the amount of light received is less than the predetermined amount is the first state, and the amount of light received is the predetermined amount Performing a state determination to determine that the above-described bright state is the second state;
A switching position at which the light state is switched to the dark state is specified based on the result of the state determination in the state where the detection sensitivity of the light sensor is set to the first sensitivity,
The position one step after the specified switching position is in the dark state when the detection sensitivity of the light sensor is set to the first sensitivity, and the position one step before the switching position is the position of the light sensor It is determined whether or not a bright state is obtained with the detection sensitivity set to the second sensitivity.
When the amount of light received at a position one step before the switching position is a maximum value, the position after a predetermined number of steps after the switching position is dark during normal movement and one more than the switching position. The timepiece according to claim 1, wherein the position of the pointer wheel is detected by determining whether or not the position before the step is bright. The control means
During normal movement, the pointer wheel is determined by determining whether the position two steps after the switching position is dark and the position one step before the switching position is bright. The timepiece according to claim 5, characterized in that the position of is detected. The control means
When the light reception amount at the position one step before the switching position is not the maximum value, the position before the switching position by a predetermined number of steps is brighter than the position one step before the normal movement. 7. The timepiece according to claim 5, wherein the position of the pointer wheel is detected by judging whether or not the position after a predetermined number of steps from the switching position is dark. The control means
The watch according to any one of claims 1 to 7, wherein at least one of the light emission intensity of the light emitting element and the light receiving sensitivity of the light receiving element is adjusted, and the detection sensitivity of the light sensor is set. Equipped with clocking means to clock the time,
The control means
In a normal hand movement, using a third sensitivity that is lower than the first sensitivity and equal to or higher than the second sensitivity, the third sensitivity at a position different by a predetermined number of steps from the switching position The position of the pointer car is detected by judging whether the result of the state judgment and the result of the state judgment at the switching position are different or not. Clock. A day carriage connected to the pointer wheel,
The control means
When a predetermined input operation is received, a reference position setting operation is performed to set a position for performing the state determination related to detection of the position of the pointer wheel at the time of normal movement;
As a result of performing the reference position setting operation, when the position for performing the state determination is set, the date indicated by the date driving vehicle is drive-controlled rather than the date when the predetermined input operation is received. Change to the date you advanced,
As a result of performing the reference position setting operation, when the position for performing the state determination is not set, the drive control of the motor is performed, from the date when the predetermined input operation is received. The clock according to any one of claims 1 to 9, wherein the date is also changed to a date that has been traced back.

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