JP4832747B2 - Radio correction clock - Google Patents

Description

  The present invention relates to a radio-controlled timepiece that receives a broadcast wave including a time signal and a standard radio signal including a standard time signal and corrects the time.

For example, a radio-controlled timepiece that receives a standard time signal included in a standard radio signal transmitted from a standard radio wave transmission station (JJY) and corrects the time is known (for example, see Patent Document 1).
In this standard time signal, time information such as minute information, hour information, date information, day information, daylight saving time information, etc. is encoded as a pulse signal every minute, and the switching point of the level of the pulse signal is Seconds are synchronized with the standard time.
Japanese Patent Laid-Open No. 5-157859

  A general radio-controlled timepiece properly extracts a standard time signal from a standard radio signal when the reception state is good, and corrects the time based on the extracted time signal.

However, the standard radio wave including the standard time signal transmitted from the standard radio wave transmission station has a frequency of about 40 kHz or 60 kHz and a transmission output of several tens of kW. For this reason, the reception state may not be good depending on the installation location of the radio-controlled timepiece.
The reception status varies depending on, for example, the distance between the installation location and the transmitting station, and also depends on the installation location in the suburbs and urban areas, the structure of the building at the installation location, the distance from the window of the installation location, and the noise source at the installation location. Changes due to the effects of noise.
Further, it takes about several minutes to properly receive all the time information included in the standard time signal, and the power consumption is relatively large.

By the way, for example, a clock that receives an AM radio broadcast including a time signal and corrects the time is also known.
However, in the above-described clock, second information and minute information are corrected based on the time signal at every hour, but other information such as time information, year information, month information, day information, daylight saving time information, etc. are obtained from the time signal. Information cannot be obtained, and the information cannot be corrected.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a radio wave that can correct the time even when the reception state of the standard time signal is not good and can reduce power consumption. To provide a modified watch.
Another object of the present invention is to provide a radio-controlled timepiece capable of correcting time information other than second information and minute information that can be corrected by a time signal.

In order to achieve the above target, the radio-controlled timepiece of the present invention includes an internal clock, broadcast wave receiving means for receiving a broadcast wave including a time signal at a predetermined time, and a standard for receiving a standard radio signal including a standard time signal. Correcting time information measured by the internal clock based on the time signal received by the radio wave receiving means and the broadcast wave receiving means , and among the full code of the standard time signal received by the standard radio wave receiving means, A setting unit is provided for performing reception setting for receiving time information of any of time information, year information, month information, day information, daylight saving time information, or wave stop information, and input from the setting unit by operation of the setting unit based on a signal indicating the setting information, any one of the time information performs reception timing control for receiving the standard radio wave receiving means, it has an operation switch, the operation switch Misao Time when it is, performs reception timing control for the full code reception of the standard time signal to the calibration signal receiver unit, the internal clock counts based on the time information received or the full code of the received results And control means for correcting the information.

  Preferably, when the set time is reached, the control means includes any one of time information, year information, month information, day information, daylight saving time information, and wave stop information in the standard time signal. A reception timing control is performed to cause the standard radio wave receiving means to receive time information, and the time information measured by the internal clock is corrected according to the time information received by the standard radio wave receiving means.

  Preferably, the control means sets time information which is measured by the internal clock based on time information input at the initial time.

  Preferably, the standard radio wave receiving unit has a switch for receiving a full code of the standard time signal, and the control unit is configured to receive the standard radio wave receiving unit when the reset switch is operated. To receive the full code of the standard time signal, and correct the time information measured by the internal clock based on the result of the full code reception.

  Preferably, the display unit displays time information measured by the internal clock, and the control unit displays the display according to the corrected time information when the time information of the internal clock is corrected. The display time by the means is corrected.

  Preferably, the standard radio signal receiving means is configured to receive time information of time information, year information, month information, day information, daylight saving time information, or stoppage information among the standard time signal. Setting means to perform, the control means performs the reception timing control for causing the standard radio wave receiving means to receive the information set by the setting means when the set time is reached, and the standard radio wave reception The time information measured by the internal clock is corrected according to the time information received by the means.

ADVANTAGE OF THE INVENTION According to this invention, even if it is a case where the reception state of a standard time signal is not good, time correction can be performed and the electromagnetic wave timepiece which can reduce power consumption can be provided.
Further, according to the present invention, it is possible to provide a radio-controlled timepiece that can correct information other than second information and minute information that can be corrected by a time signal.

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

  The radio-controlled timepiece according to the present embodiment receives a broadcast wave including a time signal at a predetermined time, for example, around every hour, and time information such as second information and minute information that the internal clock measures based on the time information. When the set time is reached, the preset time information of the reception target other than the second information and the minute information that can be corrected by the time signal among standard time signals, for example, time information, year information, Time information that the reception clock is controlled to receive time information such as month information, day information, daylight saving time information, stop wave information, etc., and the internal clock measures the time according to the time information received by the standard radio wave receiver. Correct the display time.

For example, in this embodiment, AM radio broadcast radio waves including time signal information are used as broadcast radio waves. There are several advantages of adopting time signal information included in AM radio broadcasting.
1. There are multiple transmitter stations nationwide.
2. The transmission output of the AM radio broadcast radio wave is larger than the transmission output of the standard radio wave transmission station.

For example, an AM radio broadcasting station performs AM radio broadcasting from a suburb of an urban area with a relatively large transmission output.
For example, AM radio broadcasting stations are installed in the suburbs of cities such as Sapporo, Tokyo, Osaka and Fukuoka as shown in Table 1. Radio broadcasting stations are established within 50 km from urban areas such as Sapporo, Tokyo, Osaka and Fukuoka.
For example, AM radio broadcast radio waves are output from Tokyo-NHK first broadcast, frequency 594 kHz, transmission output 300 kW from Sakaimachi, Minamisaitama-gun, Saitama Prefecture. AM radio broadcast radio waves are being output from Tanjo, Miharacho, Minamikawachi-gun, Osaka Prefecture, at the first NHK NHK broadcast, a frequency of 666 kHz, and a transmission output of 100 kW.

3. Standards relating to noise in the frequency band in which radio broadcasting is conducted are defined.
Many electronic devices such as home appliances are designed to satisfy this standard, and therefore the noise intensity output from these electronic devices is small. For this reason, the reception environment of AM radio broadcasting is good.

Further, the AM radio broadcast radio wave is 525 kHz to 1605 kHz in the medium wave broadcast band, and the standard radio wave is several tens of kHz. Each radio wave can be received using the same ferrite bar antenna, and the antenna can be shared. The modulation method is the same for AM modulation. Therefore, in the embodiment described below, the AM radio broadcast and the standard time radio signal demodulation unit are partially shared.
Hereinafter, the radio-controlled timepiece according to the present embodiment will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram showing an embodiment of a radio-controlled timepiece according to the present invention. FIG. 2 is a circuit diagram showing a specific configuration example of a radio wave receiving system in the radio wave correction watch shown in FIG. 3 is a plan view including a train wheel portion of the radio wave correction watch shown in FIG. 1, and FIG. 4 is a cross-sectional view of the radio wave correction watch shown in FIG.

  As shown in FIGS. 1 and 2, the radio-controlled timepiece 1 according to the present embodiment includes a radio wave receiving system 11, a reset switch 12, an oscillation circuit 13, a control circuit 14, a drive circuit 15, a light emitting element 16, a buffer circuit 17, It has a drive circuit 18, a display unit 20, a display 30, a second hand motor 121, an hour / minute hand motor 131, a light detection sensor unit 140, a manual correction system 150, transistors Q1 and Q2, and resistance elements R1 to R4.

  The reset switch 12 corresponds to an example of an operation switch according to the present invention. The control circuit 14 corresponds to an example of a control unit according to the present invention. The display unit 20 and the display 30 correspond to an example of display means according to the present invention.

  In the present embodiment, the display unit 20 includes a drive circuit 15, a light emitting element 16, a buffer circuit 17, a drive circuit 18, a display 30, a second hand motor 121, an hour to display the time using an analog hand. It is constituted by a minute hand motor 131, a light detection sensor unit 140, a manual correction system 150, transistors Q1 and Q2, and resistance elements R1 to R4. In addition to the analog display unit 20, a digital time display device such as a liquid crystal may be provided.

The radio wave reception system 11 receives, for example, a standard radio wave (also referred to as a standard time radio signal) including standard time information (also referred to as a time code) transmitted from a standard radio wave transmission station (not shown), performs predetermined processing, and performs a signal S1130. To the control circuit 14.
Further, the radio wave reception system 11 receives a radio broadcast radio wave including time signal information transmitted from, for example, an AM radio broadcast station, performs a predetermined process, and outputs it to the control circuit 14 as a signal S1160.

  Specifically, as shown in FIG. 2, the radio wave receiving system 11 includes a ferrite bar antenna 1110, a standard radio frequency switching unit 1120, a standard radio wave (long wave) receiving circuit 1130, a radio broadcast frequency switching unit 1140, and an AM radio receiving circuit. 1150 and a filter portion 1160.

The standard radio frequency switching unit 1120 and the standard radio wave receiving circuit 1130 correspond to an example of a standard radio wave receiving unit according to the present invention.
The radio broadcast frequency switching unit 1140, the AM radio receiving circuit 1150, and the filter unit 1160 correspond to an example of a broadcast radio wave receiving unit according to the present invention.

  Ferrite bar antenna 1110 receives standard time radio signals and AM radio broadcast radio waves. As described above, the standard time radio signal and the AM radio broadcast radio wave have a relatively long wavelength and can be received by the ferrite bar antenna 1110.

The ferrite bar antenna 1110 includes a ferrite bar 1111, a coil part L1111, and a coil part L1112.
In the present embodiment, for example, as shown in FIG. 2, a coil portion L1111 and a coil portion L1112 are provided at both ends of the ferrite bar 1111.

The standard radio wave frequency switching unit 1120 switches the standard radio wave reception frequency based on, for example, a standard radio wave reception frequency output from the control circuit 14, for example, a control signal CTL1123 for switching between 40 kHz and 60 kHz in this embodiment.
Specifically, for example, the standard radio frequency switching unit 1120 includes a capacitor 1121, a capacitor 1122, and a switch 1123.
The capacitor 1122 and the switch 1123 connected in series are connected in parallel to the capacitor 1121 and the coil portion L1111 wound around the ferrite bar antenna 1110.
One end of the capacitor 1121, one end of the coil portion L1111 and the terminal Tb of the switch 1123 are connected to the reference potential GND. One end of a capacitor 1122 is connected to the terminal Ta of the switch 1123.
The other end of the capacitor 1121, the other end of the coil portion L1111 and the other end of the capacitor 1122 are connected in common, and are connected to the input end of the standard radio wave receiving circuit 1130.

The switch 1123 sets the terminal Ta and the terminal Tb to a conductive or non-conductive state based on the control signal CTL1123.
Specifically, for example, when a 60 kHz standard time radio signal is received, when the control signal CTL 1123 for setting the terminal Ta and the terminal Tb to the non-conductive state is output from the control circuit 14, the switch 1123 is connected to the capacitor 1122. By setting the coil portion L1111 to a non-conducting state, a resonance circuit is formed by the coil portion L1111 and the capacitor 1121, and the resonance frequency is set to 60 kHz.

  On the other hand, when receiving a 40 kHz standard time radio signal, the control circuit 14 outputs a control signal CTL 1123 for setting the terminal Ta and the terminal Tb to the conductive state. Accordingly, the switch 1123 sets the terminal Ta and the terminal Tb to be in a conductive state, thereby forming a resonance circuit in which the capacitor 1121, the capacitor 1122, and the coil portion L1111 are connected in parallel. For example, the resonance frequency is 40 kHz lower than 60 kHz. Set to.

The standard radio wave receiving circuit 1130 decodes the standard time radio wave signal S1120 input via, for example, the ferrite bar antenna 1110 and the standard radio frequency switching unit 1120, and outputs the standard time signal to the control circuit 14 as the signal S1130.
Specifically, the standard radio wave receiving circuit 1130 includes, for example, an RF amplifier, a detection circuit, and a waveform shaping circuit (not shown), performs amplification processing, detection processing, waveform shaping processing, and the like, and outputs a standard time signal as a processing result as a signal S1130. Output as. The control circuit 14 corrects the time based on the standard time signal.

  In addition, for example, the standard radio wave reception circuit 1130 receives the standard time radio wave signal on or receives based on the control signal CTL 1130 that is output from the control circuit 14 and controls the reception on state or reception off state of the standard time radio signal. Control off state.

Japanese standard radio waves are operated under the National Institute of Communications and Communications Technology (NICT). Standard radio wave transmitters that transmit standard radio waves with a frequency of 40 kHz and standard radio wave transmitters that transmit standard radio waves with a frequency of 60 kHz. Is provided.
The standard radio wave received by the radio wave receiving system 11 is sent in a form as shown in FIG.

  Specifically, the time code is composed of three types of signal patterns of 1, 0, and P, and is distinguished by a 100% amplitude period width in one signal pattern of 1 second (sec). 800 ms and 200 ms. The modulation method is amplitude modulation with a maximum value of 100% and a minimum value of 10%.

  When the reception state is good, the radio wave receiving system 11 outputs a signal S1130 to the control circuit 14 as a pulse signal corresponding to the standard radio wave signal, as shown in FIG.

  This signal S1130 is composed of, for example, a high level corresponding to the first level and a low level corresponding to the second level. The control circuit 14 performs reception state evaluation processing based on the high level, the low level, the falling edge ed1 from the high level to the low level, and the rising edge ed2 from the low level to the high level. When the edges ed1 and ed2 are not distinguished, they are simply referred to as edges ed.

Next, transmission data of the long wave standard radio wave will be described.
FIG. 6 shows an example of the time code of the standard time radio signal. 6A shows a format other than 15 and 45 minutes per hour, and FIG. 6B shows a format of 15 minutes and 45 minutes per hour. The transmission information includes minute information, hour information, accumulated date information from January 1, daylight saving time information (SU1, SU2), year information, day information, leap second information (LS1, LS2), and stop information (ST1 to ST6). ).

  The time data is transmitted at 1 bit / sec. One frame is one frame, and information on the accumulated date from the above-mentioned minute / hour / January 1 is provided as a BCD code in this frame. In addition to the 0 · 1, the transmitted data includes a marker called P code. This P code has several locations in one frame, and the minute (0 seconds), 9 seconds, 19 seconds, 29 seconds, Appears at 39, 49, 59 seconds. This P code appears continuously only once at 59 seconds and 0 seconds in one frame, and the position where this P code appears continuously becomes the minute position. In other words, since time data such as minute / hour data is determined in the frame with reference to this minute position, time data cannot be extracted unless this minute position is detected.

For example, in detail, as shown in FIG. 6A, when the time data is transmitted at a time other than 15 minutes and 45 minutes per hour, the minute information is from the first to the ninth second, and the hour information is the twelfth second. 19th to 19th, accumulated date information (day information) from 22nd to 34th, daylight saving time from 38th and 40th, year information from 41th to 49th, day information from 50th In 53 seconds, leap second information is transmitted in 53 seconds and 54 seconds.
Further, in the case of 15 minutes and 45 minutes per hour, the time data is transmitted, for example, as shown in FIG. 6B, the minute information is from the first to the ninth second, and the hour information is from the twelfth to the nineteenth second. The accumulated date information (day information) is transmitted from the 22nd to the 34th second, and the wave stop information is transmitted at the 50th or 56th second.

  For the second signal, the level of the pulse signal of the radio signal rises, and 55% (the center of the 10% value and the 100% value) of the rise of the pulse signal synchronizes with the 1 second signal at the standard time.

The radio broadcast frequency switching unit 1140 controls to switch, for example, the reception frequency of the radio broadcast radio wave output from the control circuit 14, for example, 594 kHz for the Tokyo NHK first broadcast JOKA and 666 kHz for the Osaka NHK first broadcast JOBK in this embodiment. Based on the signal CTL 1143, the radio broadcast radio wave reception frequency is switched.
Specifically, for example, the radio broadcast frequency switching unit 1140 includes a capacitor 1141, a capacitor 1142, and a switch 1143.
The capacitor 1142 and the switch 1143 connected in series are connected in parallel to the capacitor 1141 and the coil portion L1112 wound around the ferrite bar antenna 1110.
One end of the capacitor 1141, one end of the coil portion L1112, and one end of the capacitor 1142 are connected to the reference potential GND. The other end of the capacitor 1142 is connected to the terminal Tc.
The other end of the capacitor 1141, the other end of the coil portion L1112 and the terminal Td are connected in common, and are connected to the input end of the AM radio receiving circuit 1150.

The switch 1143 sets the terminal Tc and the terminal Td to a conductive state or a non-conductive state based on the control signal CTL 1143.
Specifically, when receiving the radio broadcast radio wave of the Osaka NHK first broadcast JOBK, the control signal CTL 1143 for setting the terminals Tc and Td to the non-conductive state is output from the control circuit 14. As a result, the switch 1143 sets the capacitor 1142 and the coil portion L1112 in a non-conductive state, thereby forming a resonance circuit by the coil portion L1112 and the capacitor 1141, for example, and setting the resonance frequency to 666 kHz.

  On the other hand, for example, when receiving a radio broadcast wave of the Tokyo NHK first broadcast JOAK, the control circuit 14 outputs a control signal CTL 1143 for setting the terminals Tc and Td to the conductive state. Accordingly, the switch 1143 sets the terminal Tc and the terminal Td to the conductive state, thereby forming a resonance circuit in which the capacitor 1141, the capacitor 1142, and the coil portion L1112 are connected in parallel, and the resonance frequency is set to 594 kHz lower than 666 kHz. Set.

The AM radio receiving circuit 1150 demodulates radio broadcast radio waves input via, for example, the ferrite bar antenna 1110 and the radio broadcast frequency switching unit 1140, extracts time signal information included in the AM radio broadcast radio waves, and filters as a signal S1150. 1160.
Further, the AM radio reception circuit 1150 receives, for example, a reception on state of a reception operation such as radio wave demodulation based on a control signal CTL 1150 for controlling the reception on state or reception off state of the radio broadcast output from the control circuit 14. It also controls the reception off state.

FIG. 7 is a functional block diagram showing a specific example of the AM radio receiving circuit shown in FIG.
For example, the AM radio reception circuit 1150 includes an amplifier 1151, a crystal filter unit 1152, and a detection circuit 1153 as shown in FIG.
The amplifier 1151 amplifies the signal S1140 output from the ferrite bar antenna 1110 and the radio broadcast frequency switching unit 1140, for example, and outputs the amplified signal S1151 to the crystal filter unit 1152.

FIG. 8 is a diagram showing a specific example of time signal information included in a general AM radio broadcast radio wave around every hour.
For example, AM radio broadcast radio waves transmitted from a radio broadcast station include time signal information as shown in FIG. 8 near the hour (00:00). Specifically, for example, a pulse signal p having a frequency of 440 Hz is AM-modulated at 57 seconds, 58, 59 seconds, and a preset frequency, for example, an 880 Hz time signal (attenuation signal) is set every hour (00:00). d is AM-modulated. For example, the rising times T57, T58, T59, and T00 of the pulse signal p and the attenuation signal d are synchronized in seconds.

FIG. 9 is a diagram for explaining a frequency spectrum of an AM radio broadcast radio wave including time signal information around every hour on the hour shown in FIG.
When the AM radio broadcast radio wave including time signal information includes the pulse signal p and the attenuation signal d shown in FIG. 8, for example, as shown in FIG. 9, the frequency (f0 + f1) and the frequency (f0) are centered on the carrier wave f0. -F1) has a linear frequency spectrum.

The filter unit 1152 extracts a noon signal having a predetermined frequency based on the broadcast radio wave. In this embodiment, an example in which a crystal filter is used as the filter unit 1152 is shown.
Specifically, the crystal filter unit 1152 includes a first crystal filter unit 11521 and a second crystal filter 11522 as shown in FIG. 7, for example.
For example, as shown in FIG. 9, the crystal filter unit 1152 outputs a signal S1152 having only a frequency (f0 + f1) or frequency (f0−f1) component based on the signal S1151 output from the amplifier 1151.

  Specifically, when detecting 880 Hz as the frequency of the NHK first broadcast time signal in Tokyo and Osaka, the crystal filter unit 1152 has 593.120 kHz as the first crystal filter unit 11521, the second crystal filter unit A filter for passing only 665.120 kHz is provided as 11522.

  The detection circuit 1153 AM detects a signal having a frequency of 440 Hz or a frequency of 880 Hz based on the signal S1152 output from the crystal filter unit 1152, and outputs a signal S1150. The AM detection of the detection circuit 1153 is detected by a commonly used detection method, for example, square detection, envelope detection, or the like.

  The filter unit 1160 extracts only the time signal information based on the signal S1150 output from the detection circuit 1153, and outputs it to the control circuit 14 as the signal S1160.

When the heterodyne detection method is employed, the radio reception circuit 1150 includes an amplifier 1154, a local oscillation circuit 1155, a frequency conversion circuit 1156, a crystal filter unit 1157, and a detection circuit 1158, as shown in FIG.
When the heterodyne detection method is adopted for the radio reception circuit 1150, different input frequencies can be changed to the intermediate frequency fi of the same frequency by changing the frequency of the local oscillation signal S1155 output from the local oscillation circuit 1155. As a result, as shown in FIG. 11, the passing frequency of the crystal becomes (fi-f1) or (fi + f1).
Specifically, when receiving the NHK first broadcast in Tokyo and Osaka, if the intermediate frequency fi is 455 kHz, the local oscillation frequency for frequency conversion is set to (fi + f1), so the NHK first broadcast in Tokyo. In this case, the local oscillation frequency is 1049 kHz, and in the case of the NHK first broadcast in Osaka, it is 1121 kHz. As a result, since both are converted to the same 455 kHz, it is sufficient to use a single type of crystal filter that passes only 454.12 kHz or 455.880 kHz.

  The reset switch 12 is operated, for example, when the standard radio wave receiving circuit 1130 receives a full code of the standard time signal, and outputs a signal S12 to the control circuit 14 in accordance with the operation. When the signal S12 is input from the reset switch 12, the control circuit 14 corrects the time.

  The oscillation circuit 13 includes a crystal oscillator CRY and capacitors C2 and C3, and supplies a basic clock having a predetermined frequency to the control circuit 14.

The control circuit 14 has an internal clock 1401 and a memory 1402.
The internal clock 1401 includes, for example, a summer time information counter, a year information counter, a month information counter, a day information counter, a day information counter, a time counter that measures time information, a minute counter that measures minute information, and a second counter that measures second information Etc.

  The memory 1402 is used as a work space of the control circuit 14, for example. For example, the memory 1402 is configured by a RAM (Random access memory) or the like.

  The control circuit 14 sets time information, for example, year information, month information, day information, day information, hour information, minute information, and second information, which the internal clock 1401 measures based on the time information input at the initial time, Based on the time information timed by the internal clock 1401, the display time is corrected as will be described later.

  As the initial time information setting input, for example, the control circuit 14 causes the standard radio wave receiving circuit 1130 to forcibly receive a standard radio signal including time information, and the internal clock 1401 measures the time based on the time information. The time information measured by the internal clock 1401 may be corrected based on the time information input from an input unit (not shown).

  Further, the control circuit 14 corrects the time information measured by the internal clock 1401 based on the time signal received by the AM radio reception circuit 1150, and when the set time comes, the time signal of the standard time signal. In accordance with the time information received by the standard radio wave reception circuit 1130, the standard radio wave reception circuit 1130 receives the preset time information to be received other than the second information and minute information that can be corrected by the standard radio wave reception circuit 1130. The time information timed by the internal clock 1401 is corrected.

  The control circuit 14 performs a time correction operation at a preset time (set time) based on, for example, time information measured by the internal clock 1401. At this time, the control circuit 14 causes the AM radio receiving circuit 1150 to receive the broadcast radio wave at the set time, and time information such as second information and minute information timed by the internal clock 1401 based on the extracted time signal information. The time is adjusted so as to be synchronized with the information.

The control circuit 14 performs reception timing control when receiving the AM radio broadcast radio wave.
More specifically, the control circuit 14 receives AM radio broadcast waves from a predetermined time including every hour, for example, several tens of seconds before every hour, based on time information measured by the internal clock 1401, for example, as reception timing control. The control signal CTL 1150 to be output is output to the AM radio receiving circuit 1150.
Usually, since the quartz watch has an accuracy of 20 seconds per month, the time signal information can be reliably received if reception of radio broadcast waves is started as described above.

  In addition, the control circuit 14 outputs the control signal CTL 1143 so as to receive the AM radio broadcast wave with the better reception state, for example, and sets the reception frequency of the AM radio broadcast wave.

  Based on the signal S1160, the control circuit 14 detects a rising edge with a frequency of 880 Hz, for example, and sets the rising time to every hour on the hour (00:00). At this time, the internal clock 1401 measures year information, month information, day information, hour information, minute information, and second information as time information based on the standard time radio signal, and the control circuit 14 determines the second based on the time signal information. Modify information and minute information.

  In addition, the control circuit 14 sets time information other than second information and minute information that can be corrected by a time signal among the standard time signals at a set time, for example, hour information, year information, month information among standard time signals. , The reception timing control is performed to cause the standard radio wave reception circuit 1130 to receive time information of any of the day information, the daylight saving time information, and the stop wave information, and the internal clock 1401 is set according to the time information received by the standard radio wave reception circuit 1130. Correct the time information to be timed.

The set time is received several times a month, for example, in a time zone in which the reception state of the standard radio wave is good. Specifically, time information, year information, month information, day information (accumulated day information), etc. are received from the standard radio signal at around 2:14 am on the first day of every month, and the time information by the internal clock 1401 is corrected. To do.
By doing so, time information other than minute information and second information that can be corrected by the time signal information can be corrected.

The reception timing control by the control circuit 14 will be described.
For example, as shown in FIGS. 6A and 6B, the timing at which time information such as time information, year information, month information, day information, daylight saving time information, and stop wave information is transmitted among the standard time signals. Are pre-defined.

  For this reason, the control circuit 14 should receive at least 12 seconds based on the time information measured by the internal clock 1401 when it is desired to receive preset time information, for example, time information, of the standard time signal. The reception timing control of the standard radio wave receiving circuit 1130 is performed so that the standard time signal is received 19 seconds after the first.

  In addition, the control circuit 14 performs reception timing control of the standard radio wave reception circuit 1130 so that reception is performed from the 22nd to the 34th when the set time information to be received is integrated date information (date information). .

In addition, when the set time information to be received is summer time information, the control circuit 14, for example, as shown in FIG. 6A, shows the 38th and 40th seconds at times other than 15 minutes and 45 minutes. The standard is to receive the 41st to 49th seconds for year information, 50 to 53 seconds for day information, and 53 and 54 seconds for leap second information. The reception timing of the radio wave receiving circuit 1130 is controlled.
Further, when the set time information to be received is wave stop information, for example, as shown in FIG. 6B, the control circuit 14 sets the 15th / 45th minute, the 50th or the 56th second. The reception timing control of the standard radio wave receiving circuit 1130 is performed so as to be received.

The time information to be received in the standard time signal may be set in advance at the time of shipment.
Further, for example, the control circuit 14 sets time information to be received based on a signal input from an input unit (setting means) (not shown), and previously stores, for example, as shown in FIGS. 6 (a) and 6 (b). Based on a table that associates each time signal among the specified standard time signals and transmission timing, the reception timing corresponding to the input time signal to be received is determined, and based on the determined reception timing, The reception timing control of the standard radio wave receiving circuit 1130 may be performed.

  The control circuit 14 outputs a control signal CTL 1123 for switching the reception frequency, causes the standard radio frequency switching unit 1120 to switch the reception frequency to 40 kHz or 60 kHz, and receives the standard time radio signal having the better reception state.

Hereinafter, the function of the control circuit 14 will be described in more detail.
For example, when the reset switch 12 is operated at the initial time or when the control circuit 14 is operated, the origination process of the pointer wheel is performed, and the drive signals CTL1 and CTL2 corresponding to the time information timed by the internal clock 1401 are output. The time is displayed using the hands.
The control circuit 14 performs the phase detection process of the hour / minute hand wheel and the second hand wheel, the origin search process of the second hand, the origin search process of the hour / minute hand, and detects the position of each hand wheel after a predetermined time. Set a guideline.

For example, the phase adjustment processing is performed by setting the hour / minute hands to a position where the light output from the light emitting element 142 passes through the light transmitting portion provided in the hour / minute hand wheel and the light transmitting portion provided in the second hand wheel. Drive the car and the second hand wheel.
In the second hand origin search process, the light output from the light emitting element 142 is received by the light receiving element 144 by the light shielding portion and the light transmitting portion provided in the second hand wheel, and the origin is searched based on the light on / off pattern. The
As will be described later, the hour / minute hand origin search process is a light on / off pattern in which the light output from the light emitting element 142 is received by the light receiving element 144 by the light shielding portion and the light transmitting portion provided in the hour / minute hand wheel. The position is searched based on.

  The control circuit 14 samples a standard time radio signal (for example, 32 Hz) for a predetermined time, for example, 8 seconds in this embodiment, and determines the reception state based on the sampling result.

  Specifically, the control circuit 14 samples the signal S1130 input from the radio wave reception system 11 (for example, 32 Hz), detects the edge ed, and determines the reception state based on the presence or absence and the number of the edge ed. .

  The control circuit 14 counts various counters of the internal clock 1401 based on the basic clock by the oscillation circuit 13 when the time can be set based on the standard radio time signal received at the set reception frequency. Take control.

  When the reception state is not within the reference range, the control circuit 14 outputs the drive signal DR1 to the drive circuit 15 without outputting the control signal CTL1, and causes the light emitting element 16 as the notification means to emit light to the user. Notify that the standard radio wave signal is hardly received.

  The control circuit 14 compares the time measured by the various time counters of the internal clock 1401 with the standard time information based on the standard time radio signal received by the radio wave reception system 11, and if an error has occurred. Corrects the time counter according to the error, inputs the pulse signal P for correction to the motor 131 as the control signal CTL2 according to the correction, performs fast-forward driving, etc., and corrects the time display by the pointer. Do.

12 is a front view of the radio-controlled timepiece shown in FIG.
For example, as shown in FIG. 12, the display 30 is provided on the lower side (6 o'clock side) of the pointer shaft at the approximate center of the dial 201 of the timepiece main body 100.
The display 30 can display time information, for example, second information, minute information, hour information, year information, month information, day information, day of week information, daylight saving time information, stop wave information, etc. in a digital manner under the control of the control circuit 14. is there.
For example, as shown in FIG. 5, the light emitting element 16 is provided in the vicinity of the 6 o'clock display portion on the lower side of the dial 201.
Further, the CdS sensor unit 140 as the light / darkness detecting means is provided in the vicinity of the 5:00 display portion of the dial 201 as shown in FIG. 12, for example. As shown in FIG. 12, the watch body 100 is provided with a second hand 202, a minute hand 203, and an hour hand 204.

Next, specific configurations of the movement of the radio-controlled timepiece and the pointer position detection system will be described with reference to FIGS. 3 and 4 and FIGS.
As shown in FIGS. 3 and 4, the watch main body 100 includes a lower case 111, an upper case 112, and a space formed by the lower case 111 and the upper case 112. The intermediate plate 113 is disposed in a state of being connected to the lower case 111.

  The watch body 100 includes a lower case 111 as a second case and an upper case 112 as a first case that are connected to face each other to form an outline, and a space formed by the lower case 111 and the upper case 112. A middle plate 113 disposed in a state of being connected to the lower case 111 at a substantially central portion of the first drive with respect to predetermined positions of the lower case 111, the middle plate 113, and the upper case 112 in the space. A system (second hand drive system) 120, a second drive system (hour / minute hand drive system) 130, a light detection sensor unit 140, a manual correction system 150, and the like are fixed or pivotally supported.

As shown in FIG. 3, the first drive system 120 includes a substantially U-shaped stator 121a, a drive coil 121b wound around one leg piece of the stator 121a, and the other magnetic pole of the stator 121a. First stepping motor 121 configured by a freely arranged rotor 121c and a first fifth transmission gear (first detection gear) in which a large-diameter gear 122a meshes with a pinion 121d of the rotor 121c. A wheel 122 and a second hand wheel 123 as a second detection gear (first pointer wheel) meshed with the small gear 122b of the first fifth wheel 122 are configured.
Here, in the second hand stepping motor 121, the stator 121a is mounted and fixed on the intermediate plate 113, and the rotor 121c is pivotally supported by the intermediate plate 113 and the upper case 112. The output control signal CTL1 of the control circuit 14 is provided. The rotation direction, rotation angle, and rotation speed are controlled based on the above.

  The first fifth wheel 122 has 60 teeth on the large gear 122a and 15 teeth on the small gear 122b, and is rotatably supported by the intermediate plate 113 and the upper case 112. The large-diameter gear 122a meshes with the rotor 121c (pinion 121d) of the second hand stepping motor 121 to reduce the rotational speed of the rotor 121c to a predetermined speed. As shown in FIG. 13, the first fifth wheel & pinion 122 has three circular transparent holes arranged at equal intervals in the circumferential direction (center angle α1 is 120 °) in the region overlapping the second hand wheel 123. A hole 122c is formed. This through-hole 122c not only allows the detection light of the light detection sensor unit 140 to pass, but at least one of them is used as a positioning hole (determining hole) when assembling the first fifth wheel & pinion 122. It is.

  In the second hand wheel 123, the large-diameter gear 123a has 60 teeth, one end of the shaft portion is pivotally supported by the upper case 112, and the second hand passes through the middle plate 113 to the lower case 111 side. A shaft 123b is press-fitted, and this second hand shaft 123b is inserted inside a minute hand pipe 134p described later, and a second hand is attached to the tip thereof. As shown in FIG. 16, the second hand wheel 123 has eleven circular shapes arranged at equal intervals in the circumferential direction (center angle α2 is 30 °) in a region overlapping with the first fifth wheel & pinion 122 by rotation. A through-hole 123c formed and a positioning light-shielding portion 123d having a different pitch at only one place (the central angle between the through-hole 123c and the through-hole 123c is 60 °) are formed. The second hand is configured to indicate the hour when the through hole 122c of the first fifth wheel & pinion 122 first faces the through hole 123c after facing the positioning light-shielding portion 123d.

The through-hole 123c not only allows the detection light of the light detection sensor unit 140 to pass, but at least one of them is used as a positioning hole (determining hole) when the second hand wheel 123 is assembled.
Further, inside these through-holes 123c, arc-shaped biasing springs 123e that are long in the circumferential direction and project in the direction of the rotation axis are defined by the cutout holes 123f. The arcuate urging spring 123e urges the second hand wheel 123 in the rotation axis direction.

  Here, the positioning light-shielding portion 123d is formed at a position away from the notch hole 123f in the circumferential direction, that is, at a region where the two notch holes 123f are separated from each other. Accordingly, a sufficient distance between the cutout hole 123f and the positioning light-shielding portion 123d can be secured, so that the detection light does not circulate into the cutout hole 123f in the region of the positioning light-shielding portion 123d, and the positioning light-shielding portion 123d reliably Detection light can be blocked. That is, since the positioning light-shielding portion 123d is formed at a position away from the region where the notch hole 123f is prone to erroneous detection due to detection light wraparound, the positioning light-shielding portion 123d is moved to the rotational angle position of the second hand wheel 122. By using this for positioning, reliable positioning can be performed.

  In the second hand wheel 123, as shown in FIG. 16, instead of providing a plurality (11) of through holes 123c, as shown in FIG. 17, a through hole 123c at a position facing the positioning light-shielding portion 123d in the radial direction is provided. Other through-holes 123c may be formed integrally with the cut-out holes 123g, respectively. According to this, it is possible to further ensure the passage of the detection light in the portion where the detection light is allowed to pass, and to reduce the waste of the material forming the second hand wheel 123.

  As shown in FIGS. 3, 4, and 14, the second drive system 130 includes a substantially U-shaped stator 131a, a drive coil 131b wound around a leg piece on one side of the stator 131a, and the stator 131a. The second fifth wheel & pinion 132 as an intermediate gear having a large-diameter gear 132a meshed with a pinion 131d of the rotor 131c and an hour / minute hand stepping motor 131 constituted by a rotor 131c rotatably arranged between the other magnetic poles of And a third transmission wheel 133 as a second transmission gear (third detection gear) in which the large-diameter gear 133a meshes with the small-diameter gear 132b of the second fifth wheel 132, and the small-diameter gear 133b of the third wheel 133. A minute hand wheel 134 as a fourth detection gear (second pointer wheel) meshed with the large diameter gear 134a and a small diameter gear 134b of the minute hand wheel 134 are provided with a large diameter gear 135a. A minute wheel 135 of the day as an intermediate gear engaged, is constituted by the hour wheel 136 of the fifth detection gear in mesh with the small diameter gear 135b of the minute wheel 135 of the day (second hand wheel).

  Here, in the hour / minute hand stepping motor 131, the stator 131 a is mounted and fixed on the intermediate plate 113, and the rotor 131 c is pivotally supported by the intermediate plate 113 and the upper case 112. The rotation direction, rotation angle, and rotation speed are controlled based on the above.

  The second fifth wheel & pinion 132 is formed such that the number of teeth of the large diameter gear 132a is 60 and the number of teeth of the small diameter gear 132b is 15, and is pivotally supported by the intermediate plate 113 and the upper case 112, and the large diameter gear 132a. Meshes with the rotor 131c (pinion 131d) of the hour / minute hand stepping motor 131 to reduce the rotational speed of the rotor 131c to a predetermined speed. As the second fifth wheel & pinion 132, the above-mentioned first fifth wheel & pinion 122 may be used, that is, the one provided with the through hole 122c may be used. Thereby, parts can be shared and the cost of the product can be reduced.

  In the third wheel 133, the large-diameter gear 133a has 60 teeth and the small-diameter gear 133b has ten teeth. One end of the shaft portion is pivotally supported by the upper case 112, and the other end side is the middle plate 113. It is rotatably arranged in a penetrating state, and the rotation of the second fifth wheel & pinion 132 is decelerated and transmitted to the minute hand wheel 134. Further, as shown in FIG. 18, the third wheel & pinion 133 is arranged at equal intervals (center angle α3 is 36 °) in the circumferential direction in a region overlapping the second hand wheel 123 and the first fifth wheel & pinion 122 by rotation. Ten circular through holes 133c are formed. This through-hole 133c not only allows the detection light of the light detection sensor unit 140 to pass, but at least one of them is used as a positioning hole (determining hole) when assembling the third wheel & pinion 133.

  In the minute hand wheel 134, the large-diameter gear 134a has 60 teeth and the small-diameter gear 134b has 14 teeth, and the minute hand pipe 134p, in which the small-diameter gear 134b is integrally formed, is formed at the side surface. It is formed so as to have a substantially T-shape when viewed. One end portion of the minute hand pipe 134p is pivotally supported by the intermediate plate 113, and the other end side shaft portion is rotatably inserted into an hour hand pipe 136p of an hour hand wheel 136 described later. Further, the minute hand pipe 134p penetrates the lower case 111 and protrudes toward the dial face of the timepiece, and a minute hand is attached to the tip thereof.

  Further, as shown in FIG. 19, the minute hand wheel 134 has three arc-shaped through holes that are long in the circumferential direction in a region overlapping with the second hand wheel 123, the first fifth wheel 122, and the third wheel 133 by rotation. 134c, 134d, and 134e are formed. The arc-shaped through-hole 134c and the arc-shaped through-hole 134d are formed with a center angle α5 separated by 30 °, and the arc-shaped through-hole 134d and the arc-shaped through-hole 134e are formed with a center angle α6 separated by 30 °. Further, the arc-shaped through hole 134e and the arc-shaped through hole 134c are formed at a central angle α7 and separated by 60 °. That is, the light-shielding portion A having the widest width is formed between the arc-shaped through hole 134e and the arc-shaped through hole 134c, and between the arc-shaped through hole 134c and the arc-shaped through hole 134d and between the arc-shaped through hole 134d and A light shielding part B narrower than the light shielding part A is formed between the arcuate through hole 134e.

  The arc-shaped through-hole 134c is formed by a circular portion 134c1 on one end side, a wide arc portion 134c2 extending from the other end side, and a narrow arc portion 134c3 connecting the two. The circular portion 134c1 defined by the narrow circular arc portion 134c3 is used not only for passing the detection light but also as a positioning hole (determining hole) when the minute hand wheel 134 is assembled.

  As shown in FIG. 4, the hour hand wheel 136 has a large-diameter gear 136a having 40 teeth, and a cylindrical hour hand pipe 136p is integrally attached to the center of the hour wheel 136a. The aforementioned minute hand pipe 134p is inserted inside. The hour hand pipe 136p is inserted into a bearing hole 111a formed in the lower case 111 and pivotally supported. The tip of the hour hand pipe 136p penetrates the lower case 111 to the dial face of the watch. It protrudes and has an hour hand attached to its tip.

  In addition, as shown in FIG. 20, the hour hand wheel 136 includes three pieces that are long in the circumferential direction in a region overlapping with the second hand wheel 123, the first fifth wheel 122, the third wheel 133, and the minute hand wheel 134 by rotation. Arc-shaped through holes 136c, 136d, and 136e are formed. The arc-shaped through-hole 136c and the arc-shaped through-hole 136d are formed with a central angle α8 of 45 ° apart, and the arc-shaped through-hole 136d and the arc-shaped through-hole 136e are formed with a central angle α9 of 60 ° apart. Further, the arc-shaped through hole 136e and the arc-shaped through hole 136c are formed at a central angle α10 and separated by 30 °, and the arc-shaped through holes 136c, 136d, and 136e have a length of the central angle β1 + β2, β3 and β4 are set to be 75 °, 60 °, and 90 °, respectively. That is, the narrowest light-shielding portion C is formed between the arc-shaped through-hole 136e and the arc-shaped through-hole 136c, and the light-shielding portion C is located between the arc-shaped through-hole 136c and the arc-shaped through-hole 136d. A wide light-shielding portion D is formed, and a light-shielding portion E wider than the light-shielding portion D is formed between the arc-shaped through hole 136d and the arc-shaped through-hole 136e.

  In addition, the arc-shaped through hole 136c connects the circular portion 136c1 located at a center angle β1 of 7.5 ° from one end side and the wide arc portion 136c2 extending from the other end side, and connects the both. It is formed by a narrow arc portion 136c3 located on both sides. The circular portion 136c1 defined by the narrow arc portion 136c3 is used not only for passing detection light but also as a positioning hole (determining hole) when the hour hand wheel 136 is assembled.

  The minute wheel 135 has 42 teeth for the large-diameter gear 135a and 10 teeth for the small-diameter gear 135b, and is pivotally supported with respect to the protrusion 111b formed on the lower case 111. The large-diameter gear 135a meshes with the small-diameter gear 134b formed on the minute hand pipe 134p, and the small-diameter gear 135b meshes with the hour hand wheel 136 (136a) to decelerate the rotation of the minute hand wheel 134 and to set the hour hand It is transmitted to the car 136.

As shown in FIG. 4, the light detection sensor unit 140 includes a light emitting element 142 formed of a light emitting diode attached to a circuit board 141 fixed to the wall surface of the upper case 112, and a lower surface so as to face the light emitting element 142. The light receiving element 144 is formed of a phototransistor attached to a circuit board 143 fixed to the wall surface of the case 111.
The anode of the light emitting element 142 is connected to the other end of the resistance element R4 in the drive circuit 18 having one end connected to the collector of the pnp transistor Q2, and the cathode is grounded and connected to the emitter of the light receiving element 144. Yes.
The collector of the light receiving element 144 is connected to the control circuit 14. The connection line with the control circuit 14 is an output line to the control circuit 14 for the detection signal DT1.
The emitter of the transistor Q2 of the drive circuit 18 is connected to the supply line of the power supply voltage Vcc, and the base is connected to the output line of the drive signal DR2 via the resistance element R3.
That is, the light emitting element 142 is connected to the drive circuit 18 so as to emit light when the low level drive signal DR2 is output from the control circuit 14.

  Further, as shown in FIG. 4, the first fifth wheel 122, second hand wheel 123, third wheel 133, minute hand wheel 134, and hour hand wheel 136 are all arranged at the same time in a sectional view. And the through-hole 122c of the 1st fifth wheel 122, the through-hole 133c of the third wheel 133, the through-hole 123c of the second hand wheel 123, the through-hole 134c (134d, 134e) of the minute hand wheel 134, and the through-hole of the hour hand wheel 136 When 136c (136d, 136e) overlaps, the detection light emitted from the light emitting element 142 is received by the light receiving element 144, and it is output that the second hand, the minute hand, and the hour hand indicate the position such as the hour. It has become.

Further, the light emitting element 142 is disposed in a mounting recess 112c as a first layout portion formed so as to open to the outside of the upper case 112, and a circular through hole having a predetermined diameter is formed on the bottom surface of the mounting recess 112c. A hole 112d is formed. The circular through-hole 112d has a property that the detection light emitted from the light emitting element 142 spreads in a divergent shape, and therefore, it is possible to prevent erroneous detection by blocking only the light that has converged by blocking the light of the spread. It is to make.
Similarly, the light receiving element 144 is disposed in an attachment recess 111c as a second arrangement portion formed so as to open to the outside of the lower case 111, and a circular shape having a predetermined diameter is formed on the bottom surface of the attachment recess 111c. A through hole 111d is opened. The circular through-hole 111d emits from the light-emitting element 142 and allows only light that has passed through the through-hole to pass as much as possible to prevent erroneous detection.

  When attaching the first fifth wheel 122, the third wheel 133, the second hand wheel 123, the minute hand wheel 134, and the hour hand wheel 136, a predetermined positioning pin is used as the circular through hole 111d of the lower case 111, and the positioning. The assembly is sequentially performed so as to penetrate the through hole and the circular through hole 112d of the upper case 112. After the upper case 112 and the lower case 111 are joined and integrated, the positioning pin is pulled out, the light emitting element 142 is attached to the attachment recess 112c where the through hole 112d is located, and the attachment recess where the through hole 111d is located The light receiving element 144 is attached to 112c.

  As a result, the through holes 112d and 111d are completely closed, and external light can be prevented from entering the internal space defined by the upper case 112 and the lower case 111. Therefore, it is possible to prevent erroneous detection due to the intrusion of external light, and since both the positioning hole at the time of assembly and the light detection through-hole are combined, compared to the case where these holes are provided separately. Centralization and downsizing of the device can be performed.

  As shown in FIGS. 3 and 4, the manual correction system 150 includes a minute wheel 135 that meshes with the small-diameter gear 134 b of the minute hand wheel 134 and the large-diameter gear 136 a of the hour hand wheel 136, and the minute wheel 135 of this day. And a manual correction shaft 151 having a gear 151a meshing with the large-diameter gear 135a. The manual correction shaft 151 is positioned outside the upper case 112 and penetrates a head 151b that can be directly touched by a user and an opening 112e that extends from the head 151b and is formed in the upper case 112. It consists of a columnar portion 151c that is pivotally supported with respect to a protrusion 111e formed on the lower case 111, and a gear 151a is formed in a lower region of the columnar portion 151c.

  The manual correction shaft 151 is configured to rotate in the same phase as the minute hand wheel 134, and when the minute hand wheel 134 is driven by the above-described second drive system 130, the minute hand wheel 134 via the minute wheel 135. When the second drive system 130 is not operated, the pointer position can be manually corrected by rotating the head 151b with a finger.

  As described above, since the second hand shaft 123b of the second hand wheel 123 is inserted into the minute hand pipe 134p of the minute hand wheel 134 and the minute hand pipe 134p of the minute hand wheel 134 is inserted into the hour hand pipe 136p of the hour hand wheel 136, the second hand wheel 123. The minute hand wheel 134 and the hour hand wheel 136 have the same rotation center axis, and when the time is displayed, the second hand rotates once every 60 seconds, the minute hand rotates once every 60 minutes, and the hour hand moves. Driven to rotate once every 12 hours.

  As shown in FIG. 21, a groove serving as a first index for positioning extending in a radial direction at a distal end portion of the minute hand pipe 134p of the minute hand wheel 134 and a distal end portion of the hour hand pipe 136p of the hour hand wheel 136 is provided. 134 g and a groove 136 g as a second index are formed. These grooves 134g and 136g are set to indicate a predetermined time, for example, 12:00 when they are aligned.

  By providing such a positioning index, even if the minute hand wheel 134 and the hour hand wheel 136 are surrounded by the lower case 111 and the upper case 112 and covered, the grooves 134g and 136g can be preliminarily aligned. Since it can be seen that it indicates the approximate time that has been set, the minute hand and hour hand can be easily attached based on that state, eliminating the need for other alignment and position confirmation processes. Manufacturing time and inspection time can be shortened. Note that the positioning index is not limited to the above groove, but may be a mark such as a potch.

FIG. 22 is a flowchart showing the operation of the hand position detection process of the radio-controlled timepiece shown in FIG.
The control circuit 14 drives the pointer driving system to detect the reference position of the pointer wheel based on the detection processing of the reference position detecting means, and then receives the signal at the ferrite bar antenna 1101 and the standard radio wave receiving circuit 1130 of the radio wave receiving system 11. The clock time of the internal clock 1401 is corrected based on the standard time radio signal, and the pointer position of the pointer wheel is set based on the clock time of the internal clock 1401.
The pointer position detection process will be described with reference to FIG.

  An hour / minute pulse signal output pattern is set from the control circuit 14 (ST101), and the drive signal DR2 is output to the drive circuit 18 at a low level. Accordingly, the transistor Q2 is turned on, and detection light is emitted from the light emitting element 142, that is, the light emitting diode.

  Subsequently, the control signal CTL1 is output from the control circuit 14, the second-hand stepping motor 121 is pulse-driven (ST102), the light receiving element 144, that is, the phototransistor is turned on, and the detection signal DT1 is changed from the high level (power supply voltage Vcc level). It is determined whether or not it has been switched to a low level (ST103).

Here, when the detection signal DT1 from the phototransistor is held at a high level, the detection signal DT1 from the phototransistor is at a high level (power supply every time the number of pulses is added to perform step driving. It is determined whether or not the voltage Vcc level has been switched to a low level (ST104 to ST106).
If the output of the detection signal DT1 from the phototransistor does not switch from the high level (power supply voltage Vcc level) to the low level even when the number of pulses reaches 9, the hour / minute hand stepping motor 131 performs one step (pulse). Then, the second hand stepping motor 121 is step-driven again (ST102), and the second hand wheel 123 is rotationally driven.

On the other hand, when it is determined in step ST103 that the detection signal DT1 from the phototransistor has been switched from the high level to the low level, the second hand wheel 123 is fast-forwarded (ST108) and compared with the output pattern stored in advance in the control circuit 14. Is performed (ST109).
As a result of the comparison, if the obtained output pattern does not match the stored output pattern, the process returns to step ST108, and the second hand wheel 123 is fast-forwarded again.

  On the other hand, when the obtained output pattern matches the stored output pattern, at that time (if the level of the detection signal DT1 is not switched to the low level by the phototransistor even at the fifth step, the phototransistor of the next At the time when the output is switched to the low level), the output of the control signal CTL1 is stopped and the circuit driving of the second hand wheel 123 is stopped. Then, the second hand wheel 123 stops at the zero return position (ST110). At this time, the second hand is corrected to a position at a predetermined time, for example, the hour (0 second), and the second hand origin searching process is completed.

  Subsequently, the control signal CTL2 is output from the control circuit 14, only the hour / minute hand stepping motor 131 is pulse-driven at a predetermined output frequency, and the minute hand wheel 134 is fast-forwarded (ST111).

Then, the output pattern from the phototransistor is compared with the output pattern stored in advance in the control circuit 14 (ST112).
As a result of the comparison, if the obtained output pattern does not match the stored output pattern, the process returns to step ST111, and the minute hand wheel 134 is fast-forwarded again.

  On the other hand, if the obtained output pattern matches the stored output pattern as a result of the comparison in step ST112, the output of the control signal CTL2 is stopped at that time, and the hour / minute hand stepping motor 131 is stopped. Then, the driving of the minute hand wheel 134 and the hour hand wheel 136 is stopped (ST113).

  Here, the position detection processing of the hour / minute hand wheel by comparing the output pattern with the output pattern stored in advance is performed by matching with any of the three types of patterns.

23A to 23C are diagrams for explaining the output pattern of the detection light of the radio-controlled timepiece shown in FIG.
That is, as shown in FIG. 23A, the output pattern of the phototransistor by the minute hand wheel 134 has two narrow B portions and one wide A portion alternately as the off-width where the light shielding portion acts. In addition, the output pattern of the phototransistor by the hour hand wheel 136 is, as shown in FIG. Is a pattern that appears alternately at a predetermined interval. As shown in FIG. 23C, the output pattern obtained by combining the two is a pattern in which the D portion, the B portion, and the A portion are combined, and the E portion, Three types of patterns, which are a combination of the B part and the A part and a pattern of the C part, the B part, and the A part, appear at predetermined intervals.
Note that the portion of the pattern that is turned on in the pattern shown in FIG. 23 is actually a toothless pattern because there is a portion that is turned off by the light blocking portion of the third wheel & pinion 133.

  Further, for example, as reference positions of the minute hand wheel 134 and the hour hand wheel 136, as shown in FIGS. 23 (a) to (c), they are set at the positions of 0:00, 4:00, and 8:00. Yes.

  When a pattern consisting of a combination of D part, B part and A part is confirmed, for example, 4:00, for example, when a pattern consisting of a combination of E part, B part and A part is confirmed, for example, 8:00, If a pattern consisting of a combination of part C, part B and part A is confirmed, for example, it is set in advance as 12:00, for example, when one of these patterns is detected, an hour / minute hand stepping motor By stopping 131, the minute hand wheel 134 and hour hand wheel 136, that is, the minute hand and hour hand can be adjusted to a predetermined time.

Then, after the hour / minute hand stepping motor 131 is stopped, the drive signal DR2 by the control circuit 14 is switched to a high level.
Thereby, the transistor Q2 of the drive circuit 18 is turned off, the light emission of the light emitting diode is stopped (ST114), and the time adjustment operation is ended.

Further, in the case of the sword attachment mode, refer to FIGS. 23A to 23C in the case where the shipping position TS is set so that the origin search process of the hour / minute hands wheel is shortened, in this embodiment, 10:30. While explaining.
For example, when the user turns on the external power supply 201, the control circuit 14 performs phase alignment processing, second hand origin search processing, minute hand origin search processing, and time adjustment processing. When the shipping position TS is set to 10:30, as shown in FIGS. 23A to 23C, after driving the second hand wheel and the hour / minute hand wheel from the shipping position TS to penetrate the detection light, Stop the hour and minute hands and search for the second hand origin. Then, by rotating the hour and minute hands wheel and detecting the C part with the light detection sensor part 140, it is detected that the position is approximately 12 o'clock, and by stopping when the B part and the A part are detected, The hour and minute hands are set at a predetermined reference position 12:00.

  For example, this 10:30 position is a position for detecting a necessary and necessary on / off pattern to be referred to when the origin search process is performed when setting the hour / minute hand wheel to the reference position. By setting a shipping guideline at this position, the origin search time is the shortest.

  FIG. 24 is a flowchart for explaining the overall operation of the radio-controlled timepiece shown in FIG. With reference to FIG. 24, the overall operation of the radio-controlled timepiece 1 will be described focusing on the operation of the control circuit 14.

For example, it is assumed that a standard time radio wave signal of 40 kHz or 60 kHz and two AM radio broadcast stations, for example, the Tokyo NHK first broadcast JOAK or the Osaka NHK first broadcast JOBK are set to be received.
Of the standard time signal, time information is set as time information to be received other than minute information and second information that can be corrected by time signal information.

In step ST201, when the time information is input at the initial time, the control circuit 14 corrects the time information measured by the internal clock 1401 based on the time information (ST202).
At this time, year information, month information, day information, day information, hour information, minute information, second information, daylight saving time information, and the like are set in the internal clock 1401 as time information.
In step ST203, the control circuit 14 drives the display unit 20, for example, the second hand drive system 120 and the minute hand drive system 130 as described above, based on the standard time information timed by the internal clock 1401, and corrects the display time by the hands. The display time on the display 30 is corrected.

  In this initial operation, the time may be adjusted by a standard time signal forcibly received by the standard radio wave receiving circuit 1130, or the time may be corrected based on time information input from an input unit (not shown). Also good.

  In step ST204, the control circuit 14 is set in advance based on the time information counted by the internal clock 1401, for example, before the set time at every hour, specifically, several tens of seconds before every hour. Is determined. For example, if it is determined that it is not the set time, the control circuit 14 updates the display time on the display unit 20 or the display 30 based on the time information by the internal clock 1401, and proceeds to the process of step ST209.

On the other hand, if it is determined in step ST204 that the set time is reached, the control circuit 14 performs timing control for receiving the AM radio broadcast radio wave based on the time information measured by the internal clock 1401 (ST205).
More specifically, the control circuit 14 receives AM radio broadcast waves from a predetermined time including every hour, for example, several tens of seconds before every hour, based on time information measured by the internal clock 1401, for example, as reception timing control. The control signal CTL 1150 to be output is output to the AM radio receiving circuit 1150.
Usually, the quartz clock has an accuracy of 10 seconds per month, so that the time signal information can be reliably received by starting reception of radio broadcast waves as described above.

  In the present embodiment, the AM radio broadcast radio wave having two frequencies can be selected and received. Therefore, the control circuit 14 outputs the control signal CTL 1143 so as to receive the AM radio broadcast radio wave with the better reception state, and AM. Set the radio broadcast reception frequency.

  When the control signal CTL 1150 indicating the reception ON state is input from the control circuit 14, the AM radio reception circuit 1150 amplifies the AM radio broadcast circuit 1150 by the amplifier 1151 based on the AM radio broadcast wave received by the ferrite bar antenna 1110, and the crystal filter unit 1152. And filtering is performed by the detection circuit 1153, and a signal S1150 is output. Based on signal S1150, filter unit 1160 outputs only time signal information as signal S1160 to control circuit 14 (ST206).

  At this time, the frequency of the AM radio broadcast radio wave and the standard time radio wave signal have a difference of about 10 times, so even if they are commonly received by the ferrite bar antenna 1110, there is almost no interference.

  In step ST208, the control circuit 14 detects a rising edge with a frequency of 880 Hz, for example, based on the signal S1160, and sets the rising time at every hour on the hour (00:00). At this time, second information and minute information are corrected among the time information timed by the internal clock 1401 (ST207).

  In step ST208, the control circuit 14 drives the second hand drive system 120 based on the time information counted by the internal clock 1401, and corrects the display time. Moreover, the control circuit 14 corrects the display time on the display 30, and proceeds to the process of step ST209.

  In step ST209, the control circuit 14 determines whether it is a preset time, for example, around 2:14 am on the first day of every month, and if it is determined that it is not the set time, the control circuit 14 proceeds to the process of step ST214. .

  On the other hand, when it is determined in step ST209 that the set time is reached, the control circuit 14 determines the standard radio wave receiving circuit 1130 based on the set reception target time code (time signal) among the standard time signals. Is controlled (ST210).

  Specifically, as described above, when it is desired to receive preset time information of the reception target, for example, time information, among the standard time signals, for example, based on the time information counted by the internal clock 1401, for example, FIG. 6 (a) and 6 (b), the reception timing control of the standard radio wave reception circuit 1130 is performed so that the standard time signal is received at least from the 12th to the 19th.

The control circuit 14 may perform control to switch the reception frequency according to the reception state.
Specifically, the control circuit 14 outputs a control signal CTL1123 for switching the reception frequency of the standard radio signal, and causes the standard radio frequency switching unit 1120 to switch the reception frequency to 40 kHz or 60 kHz, so that the reception state with the better reception state is obtained. Receive standard time radio signal.

  Specifically, first, the control circuit 14 outputs a control signal CTL 1123 for receiving a standard time radio signal having a frequency of 40 kHz to the standard radio signal switching unit 1212. When the control signal CTL 1123 is input, the standard radio signal switching unit 1213 connects the terminal Ta and the terminal Tb and sets the resonance frequency to 40 kHz. The standard radio wave receiving circuit 1130 performs decoding based on the 40 kHz standard time radio wave signal received by the ferrite bar antenna 1110, and outputs the standard time information to the control circuit 14 as a signal S 1130.

  For example, if the standard time information cannot be decoded normally, the control circuit 14 outputs a control signal CTL 1123 for receiving a standard time radio signal having a frequency of 60 kHz to the standard radio signal switching unit 1212. When the control signal CTL 1123 is input, the standard radio signal switching unit 1213 sets the terminal Ta and the terminal Tb to a non-conduction state and sets the resonance frequency to 60 kHz. The standard radio wave reception circuit 1130 performs decoding based on the 60 kHz standard time radio wave signal received by the ferrite bar antenna 1110 and outputs the standard time information to the control circuit 14 as a signal S1130.

  The control circuit 14 corrects the time information measured by the internal clock 1401 based on the reception target time information output from the standard radio wave reception circuit 1130, in this embodiment, the time information (ST211 and ST212).

  The control circuit 14 corrects the time information measured by the internal clock 1401 based on the standard time radio signal received by the standard radio wave reception circuit 1130 via the ferrite bar antenna 1110, and the internal clock 1401 counts the time as described above. Based on the time information, the second hand drive system 120 and the hour / minute hand drive system 130 are driven to correct the display time by the hands (ST213), the display time by the display 30 is corrected, and the process proceeds to step ST214.

  In step ST214, the control circuit 14 determines whether or not the reset switch 12 has been operated. If it is determined that the reset switch 12 has not been operated, the control circuit 14 returns to the process of step ST204.

On the other hand, if it is determined in step ST214 that the reset switch 12 has been operated, the control circuit 14 performs reception timing control that causes the standard radio wave reception circuit 1130 to receive a full code of the standard time signal (ST215). .
Specifically, as shown in FIGS. 6A and 6B, the control circuit 14 performs reception timing control so that the standard radio wave reception circuit 1130 receives a full code of the standard time signal.

  The control circuit 14 corrects the time information measured by the internal clock 1401 based on the result of the full code reception by the standard radio wave receiving circuit 1130 (ST216) (ST217), and the display unit 20 based on the time information by the internal clock 1401. Then, the display time on the display 30 is corrected, and the process returns to step ST204.

  As described above, the internal clock 1401, the AM radio receiving circuit 1150 that receives a broadcast wave including a time signal at a predetermined time, for example, around every hour, and the standard that receives a standard radio signal including a standard time signal. Based on the time signal received by the radio wave reception circuit 1130 and the AM radio reception circuit 1150, the time information measured by the internal clock 1401 is corrected, and when the set time is reached, the time signal of the standard time signal Is received by the standard radio wave receiver circuit 1130 by performing a reception timing control for causing the standard radio wave receiver circuit 1130 to receive preset time information such as hour information and daylight saving time information other than the second information and minute information that can be corrected by the The control circuit 14 for correcting the time information timed by the internal clock 1401 according to the time information is provided. Even when the reception state of the time signal is not good, the time signal information the influence of noise is received by a relatively small AM radio reception circuit 1150, it is possible to correct the time.

In addition, when the set time is reached, the control circuit 14 causes the standard time signal reception circuit 1130 to set preset time information other than the minute information or the second information that can be corrected by the time signal information among the standard time information. For example, since reception timing control for receiving time information and daylight saving time information is performed, for example, time information, daylight saving time information, etc. other than second information and minute information that can be corrected by a time signal can be corrected.
Also, power consumption can be reduced compared to the case where full code reception is performed.

  In addition, the control circuit 14 corrects the time based on the time signal information received by the AM radio receiving circuit 1150 with relatively low power consumption at the time of normal time adjustment, and sets the standard time, for example, several times a month. Among the signals, the reception timing control is performed so as to receive the set reception target time information, and the time adjustment is performed based on the received reception target time information. Power consumption can be reduced compared to a general radio correction clock that corrects the time.

Note that the present invention is not limited to the present embodiment, and various suitable modifications can be made.
In the present embodiment, time information to be received, such as time information and daylight saving time information, is set in advance in the standard time signal, but is not limited to this form.
For example, as shown in FIG. 25, the standard time signal reception circuit 1130 receives time information of time information, year information, month information, day information, daylight saving time information, or wave stop information among standard time signals. Based on a signal S19 indicating setting information input from the setting unit 19, the control circuit 14 provides time information, year information, month information, day information, The reception timing control is performed so that the standard radio wave reception circuit 1130 receives time information of daylight saving time information or stop wave information, and time is measured by the internal clock 1401 based on the time information received by the standard radio wave reception circuit 1130. The time information may be corrected.
For example, the setting unit 19 includes a switch, a button, a touch panel, a keyboard, and the like.
As described above, the user can set time information to be received among the standard time signals.

Further, in the present embodiment, the time display is performed by the display unit 20 including the pointer, the train wheel, the drive motor, and the display 30, but the present invention is not limited to this form. For example, the time display may be performed only by the display (LCD) 30.
Further, only the pointer by the display unit 20 and the time display by the dial may be used.

  In the present embodiment, the AM radio receiving circuit 1150 is described as a broadcast wave receiving means for receiving time signal information. However, the present invention is not limited to this form. For example, the time signal may be received by an FM radio broadcast receiving circuit, a television broadcast receiving circuit, or the like.

1 is a block diagram showing an embodiment of a radio-controlled timepiece according to the present invention. FIG. 2 is a circuit diagram illustrating a specific configuration example of a radio wave reception system in the radio wave correction watch illustrated in FIG. 1. FIG. 2 is a plan view including a train wheel portion of the radio-controlled timepiece shown in FIG. 1. FIG. 4 is a cross-sectional view of the radio wave correction watch shown in FIG. 3. It is a figure for demonstrating the electromagnetic wave reception state in the control circuit which concerns on this invention. An example of a time code of a standard time radio signal is shown. (A) shows formats other than 15 and 45 minutes per hour, and (b) shows formats for 15 minutes and 45 minutes per hour. FIG. 3 is a circuit diagram illustrating a configuration example of an AM radio reception circuit illustrated in FIG. 2. It is a figure which shows one specific example of the time signal information contained in the general AM radio broadcast electromagnetic wave at around every hour. It is a figure for demonstrating the frequency spectrum of the AM radio broadcast electromagnetic wave which includes time signal information in the vicinity of every hour shown in FIG. FIG. 3 is a circuit diagram illustrating a configuration example of a radio reception circuit illustrated in FIG. 2 when a heterodyne detection method is employed. It is a figure for demonstrating the process of the radio receiver circuit shown in FIG. 10 at the time of employ | adopting a heterodyne detection system. FIG. 2 is a front view of the radio wave correction watch illustrated in FIG. 1. It is a top view which shows the 1st drive system which drives the second hand which is a part of radio wave correction timepiece. It is a top view which shows the 2nd drive system which drives the minute hand and hour hand which are a part of radio wave correction timepieces. It is a top view which shows the 1st 5th wheel which makes a part of 1st drive system which drives a second hand. It is a top view which shows the second hand wheel which makes a part of 1st drive system which drives a second hand. It is a top view which shows the other example of the second hand wheel which makes a part of 1st drive system which drives a second hand. It is a top view which shows the 3rd wheel which forms a part of 2nd drive system which drives a minute hand and an hour hand. It is a top view which shows the minute hand wheel which makes a part of 2nd drive system which drives a minute hand and an hour hand. It is a top view which shows the hour hand wheel which makes a part of 2nd drive system which drives a minute hand and an hour hand. It is an end view which shows the front-end | tip part of a minute hand pipe and an hour hand pipe. It is a flowchart which shows the operation | movement of the pointer position detection process of the radio wave correction watch shown in FIG. It is a figure for demonstrating the output pattern of the detection light of the radio-controlled timepiece shown in FIG. 2 is a flowchart for explaining the overall operation of the radio-controlled timepiece shown in FIG. It is a circuit diagram which shows other embodiment of the electromagnetic wave correction timepiece which concerns on this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Radio wave correction clock, 11 ... Radio wave receiving system, 12 ... Reset switch, 13 ... Oscillator circuit, 14 ... Control circuit, 15 ... Drive circuit, 16 ... Light emitting element, 17 ... Buffer circuit, 18 ... Drive circuit, 19 ... Setting , 20 ... display unit, 100 ... clock main body (mechanical mechanism: movement), 111 ... lower case, 112 ... upper case, 113 ... middle plate, 120 ... first drive system (second hand drive system), 121 ... for second hand Motor (first drive source), 122 ... 1st fifth wheel (first transmission gear, first detection gear), 123 ... Second hand wheel (second detection gear, first pointer wheel), 126 ... 6th Car 127, 7th car, 130 second drive system (hour / minute hand drive system), 131 ... hour / minute hand motor (second drive source), 132 second car 5th, 133 ... third car 134 ... minute hand wheel (second pointer wheel), 135 ... minute wheel, 136 ... hour hand (Second pointer wheel), 140 ... light detection sensor, 142 ... light emitting element, 143 ... circuit board, 144 ... light receiving element, 150 ... manual correction system, 151 ... manual correction shaft, 1110 ... ferrite bar antenna, 1120 ... standard radio wave Frequency switching unit, 1130 ... long wave (standard radio wave) reception circuit, 1140 ... radio broadcast frequency switching unit, 1150 ... AM radio reception circuit, 1151, 1154 ... amplifier, 1152, 1157 ... crystal filter unit, 1153, 1158 ... detection circuit, 1155: Local oscillation circuit, 1156: Frequency conversion circuit, 1160 ... Filter unit, 1401 ... Internal clock, 1402 ... Memory.

Claims (1)

An internal clock,
Broadcast wave receiving means for receiving a broadcast wave including a time signal at a predetermined time;
A standard radio wave receiving means for receiving a standard radio wave signal including a standard time signal;
Correct the time information timed by the internal clock based on the time signal received by the broadcast wave receiving means,
A setting unit configured to perform reception setting for receiving time information of any one of time information, year information, month information, day information, daylight saving time information, and stop wave information among the standard time signals received by the standard radio wave receiving unit; Providing, based on a signal indicating setting information input from the setting unit by operation of the setting unit, performing reception timing control for causing the standard radio wave receiving means to receive any of the time information,
Having an operation switch, and when the operation switch is operated, performing a reception timing control for causing the standard radio wave receiving means to receive a full code of the standard time signal;
A radio-controlled timepiece comprising: control means for correcting time information timed by the internal clock based on the received time information or the result of receiving the full code.

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