JP2006105826A - Electronic wrist watch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize high precision equivalent to a radio-controlled time piece by slight modification in an electronic wrist watch having a power generation part and a secondary battery. <P>SOLUTION: This wrist watch has a reception coil 105 of the power generation part supplied noncontactly with energy from an outside to induce a voltage, the secondary battery 11 charged with the voltage induced by the reception coil 105, an input circuit for taking a change of the voltage induced by the reception coil 105 in as an encoding signal, and a control circuit part fed from the secondary battery. The control circuit part is provided with a decoding means for acquiring the present time information by decoding the binarized encoding signal according to a prescribed rule, a clocking means for generating time information based on a reference oscillator, and a time correction means for correcting the time information generated by the clocking means, based on the present time information acquired by the decoding means. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electronic wristwatch having a power generation unit such as a magnetoelectric conversion coil or a solar cell and a rechargeable secondary battery, and in particular, can achieve the same accuracy as a radio timepiece while maintaining low price and miniaturization. The present invention relates to an electronic wristwatch.

  An electronic wristwatch having a power generation unit such as a magnetoelectric conversion coil or a solar cell and a rechargeable secondary battery has been conventionally known (see Patent Document 1). According to this type of electronic wristwatch incorporating a power generation unit and a secondary battery, there is an advantage that it can be used for a long time without requiring troublesome battery replacement.

By connecting a quartz electronic table clock with a function to correct time information by receiving standard time radio waves (JJY radio waves) and a normal quartz wrist watch by optical communication, the accuracy of the quartz wrist watch is comparable to that of a radio clock. A timepiece system that is improved to this point has also been known (see Patent Document 2). According to the quartz wristwatch applied to such a watch system, an antenna, a capacitor, etc. for receiving standard time radio waves are unnecessary, so that there is an advantage that it can be made compact while achieving high accuracy. is there.
Japanese Patent Laid-Open No. 11-040182 Japanese Patent Application Laid-Open No. 09-113647

  However, in the quartz type wristwatch used in the timepiece system described in Patent Document 2, it is necessary to provide an optical receiving circuit including a light receiving element only for optically receiving time information from the quartz type radio-controlled timepiece side. Therefore, there is a problem that the cost is considerably higher than that of a normal quartz wristwatch.

  The present invention has been made paying attention to the above-mentioned problems, and its object is to provide an electronic wristwatch having a power generation unit such as a magnetoelectric conversion coil or a solar cell and a rechargeable secondary battery. Therefore, it is an object of the present invention to provide an electronic wristwatch that can achieve high accuracy similar to that of a radio timepiece with only a slight modification.

  Other objects and operational effects of the present invention should be easily understood by those skilled in the art by referring to the following description of the specification and the accompanying drawings.

  An electronic wristwatch according to the present invention includes a power generation unit that induces a voltage by applying energy without contact from the outside, a secondary battery that is charged with a voltage induced in the power generation unit, and a control that is fed from the secondary battery A circuit unit; and an input circuit for taking in a change in voltage induced in the power generation unit as a binary encoded signal. The circuit unit generates time information based on a decoding unit that obtains current time information by decoding a binary encoded signal fetched via an input circuit according to a predetermined coding rule, and a reference vibrator. Time measuring means and time adjusting means for correcting the time information generated by the time measuring means based on the current time information acquired by the decoding means are provided.

  According to such a configuration, it is possible to teach accurate time information to the electronic wristwatch only by modulating the energy applied in a non-contact manner from the outside with the encoded signal representing the time information. By performing the time adjustment operation based on the current time information, it is possible to achieve high accuracy of this type of electronic wristwatch without providing a standard time radio wave reception function. In addition, since it is possible to achieve high accuracy only by adding an input circuit, a decoding means, and a time adjustment means to an existing electronic wristwatch having a power generation unit and a secondary battery, a rechargeable type There is also an advantage that there is no particular cost increase for a wristwatch.

  Here, the power generation unit may be a solar cell that induces a voltage when light is applied from the outside, or a magnetoelectric conversion coil that induces a voltage when an alternating magnetic field is applied from the outside.

  In a preferred embodiment, the input is performed only for a predetermined time or within a predetermined time until reception is completed, at least on the condition that an operator for instructing time correction is operated. You may make it further comprise the input taking-in control means which takes in a binary encoding signal via a circuit. According to such a configuration, it is possible to reliably prevent a malfunction due to a pseudo-binary encode signal that may be mixed into a generated voltage (for example, a generated voltage from a solar cell).

  Further, the input capture control means completes reception within a predetermined time or within a predetermined time on condition that the time has not been corrected within the past predetermined time in addition to the operation of the operator. The binarized encoded signal may be taken in and decoded via the input circuit only during the period until. According to such a configuration, the secondary battery is not consumed wastefully due to frequent time adjustment operations.

  The present invention viewed from another aspect can also be regarded as a table clock capable of accurately teaching current time information via a power generation unit on the electronic wristwatch side. In such a table clock, the time information generated based on the reference oscillator is corrected by the function of generating the time information based on the reference oscillator and the standard time information acquired by receiving the standard time radio wave. With functions. Further, in this table clock, in response to the operation of a predetermined operation element or in response to the detection that the wristwatch is set at a predetermined position by a predetermined detector, transmission is started. A trigger means for generating a trigger signal, an electromagnetic conversion coil, an AC power supply for charging a wristwatch, an encoding means for generating an encode signal by encoding current time information according to a predetermined coding rule, and a trigger means In response to generation of a transmission start trigger signal, an electromagnetic transmission circuit that cyclically transmits an encoded signal on an alternating magnetic field for transmission by amplitude-modulating an AC power supply by the encoded signal and supplying power to the electromagnetic coil You may make it comprise.

  At this time, an indicator indicating that the encoded signal is being electromagnetically transmitted may be provided. According to such a configuration, since it is possible to set the wristwatch on the table clock after confirming that the time information is transmitted, the time correction operation is not erroneous.

  Further, when a transmission trigger signal is generated during reception of a time radio wave, reception of the standard time radio wave may be interrupted or stopped to give priority to electromagnetic transmission of the encoded signal by the electromagnetic transmission circuit. According to such a configuration, when a time transmission request is received from the wristwatch while receiving time radio waves, the time transmission operation is immediately performed without waiting for the user for 2 to 3 minutes necessary for reception of the radio timepiece. You can switch to

  According to the present invention, a rechargeable electronic wristwatch having a power generation unit such as a magnetoelectric conversion coil or a solar cell and a rechargeable secondary battery can be modified with a high degree of accuracy similar to that of a radio timepiece. Can be realized.

  In the following, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a front view showing a state in which the quartz wristwatch 1 according to the present invention is set on the radio-controlled table clock 2, FIG. 2 is an external configuration diagram of the radio-controlled table clock 2, and FIG. Are shown in FIG.

  This radio-controlled table clock 2 uses the function of generating time information based on the crystal resonator and the standard time information acquired by receiving the standard time radio wave (JJY radio wave) to generate the time information generated based on the crystal resonator. And a function to correct. Further, as will be described in detail later, the radio-controlled table clock 2 detects that the wristwatch is set at a predetermined position in response to operation of a predetermined operator or by a predetermined detector. In response to, a trigger means for generating a transmission start trigger signal, an electromagnetic conversion coil, an AC power source for charging the wristwatch, and an encoding signal is generated by encoding current time information according to a predetermined coding rule. In response to generation of a transmission start trigger signal from the encoding means and the trigger means, the AC power supply is amplitude-modulated by the encode signal and supplied to the electromagnetic coil, so that the encode signal is placed on the alternating magnetic field for power transmission. And an electromagnetic transmission circuit for transmitting to the click.

  On the other hand, a quartz wristwatch 1 that is paired with the radio-controlled table clock 2 includes a power generation unit that is energized externally to induce energy and a secondary battery that is charged with a voltage induced in the power generation unit. It has an input circuit for taking in a change in voltage induced in the power generation unit as a binarized encode signal, and a control circuit unit (CPU) fed from the secondary battery. The control circuit unit (CPU) includes a decoding means for acquiring current time information by decoding a binary encoded signal fetched via an input circuit according to a predetermined coding rule, and a time based on a reference vibrator. Time measuring means for generating information, and time correction means for correcting the time information generated by the time measuring means based on the current time information acquired by the decoding means are provided.

  More specifically, as shown in FIG. 2, the radio-controlled table clock 2 includes a pedestal part 201, a support part 202 that stands upright from the rear part of the support part 201, and a main body part 203 that protrudes forward from the upper part of the support part 202. And have. As shown in FIG. 1, a transmission indicator lamp 204 indicating that the current time information is being transmitted, a time display unit 205 for displaying the time information, and date information are displayed on the front surface of the main body unit 203. A date display unit 206 for performing transmission, a transmission start button 207 for starting transmission of current time information, a time setting button 208 for performing manual time setting, and forcibly receiving JJY radio waves. The forced reception button 209 is provided.

  A space 212 is provided on the lower surface side of the main body 203, and a mounting table portion 210 for setting the quartz wristwatch 1 is provided on the upper surface side. As shown in FIG. 2B, a power transmission coil 213 for generating an alternating magnetic field is built in the mounting table 210. As shown in FIG. 2A, constricted portions 211 and 211 are provided on both the left and right sides of the mounting table 210, and when the quartz wristwatch 1 is set on the mounting table 210. In addition, the watch band 108 (see FIG. 3A) is fitted into the constricted portions 211 and 211, and thereby the positioning of the quartz wristwatch 1 and the mounting table portion 210 on the radio wave table clock 2 side is performed.

  The space 212 is used to wrap the watch band around the main body 203 when a bracelet-shaped watch band is used.

  On the other hand, the quartz wristwatch 1 includes an annular case 101, a cover glass 102 that closes the front opening of the case 101, a back cover 103 that closes the back opening of the case 101, and a dial 104, as shown in FIG. An electronic timepiece movement (not shown) housed in a proper position between the case 101 and the back cover 103, and a magnetoelectric conversion receiving coil 105 disposed on the side of the case 101 close to the back cover. The power receiving coil 105 is supported by the circuit board 108. In the other figures, 106 is a reception start button, 107 is a time setting button, and 108 is a watch band.

  Next, FIG. 4 shows a circuit diagram (part 1) showing an electrical hardware configuration of a timepiece system constituted by a quartz wristwatch 1 and a radio-controlled timepiece 2. This circuit diagram includes a portion corresponding to the quartz wristwatch 1 and a portion corresponding to the radio table clock 2.

  First, the portion corresponding to the radio wave table clock 2 will be described. The entire circuit includes a battery 21 as a power source, an antenna 22 for receiving a JJY radio wave, a capacitor 23, a front end circuit 24, and a microcomputer (CPU) 25. , A transmission drive transistor 26, an oscillation circuit 27 that functions as an AC power supply, a transmission coil 213, a bypass switch 28, a resistor 29, and push button switches 207a corresponding to the push buttons 207, 208, and 209, respectively. , 208a, 209a, and a transmission display LED 204a that functions as the transmission indicator lamp 204.

  The antenna 22 and the capacitor 23 constitute a resonance circuit for receiving JJY radio waves. The front end circuit 24 includes an amplifier circuit that amplifies the reception output of the antenna, and a detection circuit that extracts the JJY code signal by detecting the envelope of the amplified output.

  The microcomputer (CPU) 25 includes a microprocessor, ROM, RAM, and an input / output interface, and the microprocessor implements various functions required as a radio-controlled table clock by executing a system program stored in the ROM. It is made like that. Of the system program stored in the ROM, the part corresponding to the main part of the present invention will be described in detail later with reference to the flowchart of FIG.

  The transmission transistor 26 is used for on / off control of energization to the oscillation circuit 27. When the transistor 26 is in an on state, the oscillation circuit 27 is in an oscillation state, whereas when the transistor 26 is off, the oscillation circuit 27 is in an oscillation stop state. Become.

  The oscillation output of the oscillation circuit 27 is supplied to the transmission coil 213 through the resistor 29. The resistor 29 is bypassed via a bypass switch 28, and this bypass switch 28 is ON / OFF controlled by the microcomputer 25. When the bypass switch 28 is in the on state, a relatively large current flows through the transmission coil 213, whereas when it is off, a relatively small current flows. Therefore, by supplying an encode signal corresponding to time information from the microcomputer 25 to the bypass switch 28, the oscillation output output from the oscillation circuit 27 is subjected to amplitude modulation, and as shown in FIG. The alternating current that has been generated flows. As a result, an alternating magnetic field amplitude-modulated by the encode signal is generated from the power transmission coil 213.

  Next, a circuit on the side of the quartz wristwatch 1 will be described. This circuit includes a rechargeable secondary battery 11, a microcomputer (CPU) 12, a full-wave rectifier circuit 13, a smoothing capacitor 14, and a step-down voltage. A resistor 15 for clipping, a zener diode 17 for clipping, a diode 16 for preventing backflow, and push button switches 106a and 107a corresponding to the push buttons 106 and 107, respectively.

  The microcomputer 12 includes a microprocessor, a ROM, a RAM, an input / output interface, and the like. By executing a system program stored in the ROM, the microprocessor executes various functions necessary for a quartz wristwatch. It has become. The reception coil 105 induces a voltage in linkage with the alternating magnetic field generated from the transmission coil 213, and this induced voltage causes the full-wave rectifier circuit 13, the smoothing capacitor 14, and the backflow prevention diode 16 to pass through. The secondary battery 11 is charged.

  When the receiving coil 105 is not linked to the alternating magnetic field, the microcomputer 12 operates with power supplied from the secondary battery 11. The voltage generated by the receiving coil 105 is rectified and smoothed (detected) by the full-wave rectifier circuit 13 and the smoothing capacitor 14, then stepped down by the resistor 15 and clipped by the Zener diode 17, and sent to the microcomputer 12. It is captured. The resistor 15 and the Zener diode 17 constitute an input circuit. The microcomputer 12 takes in a change in voltage induced in the receiving coil 105 as a binary encoded signal through an input circuit constituted by the resistor 15 and the Zener diode 17. Thereafter, the microcomputer 12 decodes the binarized encoded signal fetched through the input circuit composed of the resistor 15 and the Zener diode 17 according to a predetermined coding rule (see FIGS. 11 to 13). Get current time information. Further, the microcomputer 12 generates time information based on the reference vibrator, and corrects the generated time information based on the current time information acquired by the decoding means, so that the quartz wristwatch 1 side is corrected. High accuracy is achieved.

  Next, a flowchart showing processing on the table clock side is shown in FIG. 9, and a flowchart showing processing on the wristwatch side is shown in FIG.

  As shown in FIG. 9, when the battery 21 is attached and the power is turned on, the first reception operation (step 901) and the time adjustment process (step 902) are executed, and the current received via JJY radio wave Based on the time information, an accurate current time is obtained. Thereafter, a clock (timekeeping) process (step 903) is executed, and the current clock value obtained in the time correction process (step 902) is used as a reference, and the count value of the reference clock obtained through the crystal oscillator is used as a reference. Is added to the time display unit 205 and the date display unit 206 shown in FIG. 1 by executing the time display process (step 903-1). Is displayed. At the same time, the automatic reception time arrival determination process (step 903-2) and confirmation that the transmission start button has been pressed (step 903-3) are repeatedly executed. During this time, if the arrival of the automatic reception time is confirmed (step 903-2 YES), the reception operation (step 901) and the time correction process (step 902) are performed again, and the current time is the exact time received by the JJY radio wave. It is sequentially corrected based on the standard time information.

  On the other hand, on the quartz wristwatch 1 side, when the secondary battery 11 is turned on and the power is turned on, an initial setting of the display time is performed (step 1001), and then a clock (time count) is executed. ) The process (step 1002) is executed. In this clock (timekeeping) process (step 1002), the current time is sequentially updated by counting the reference clock generated based on the crystal resonator, and the current time information thus updated is displayed as a time display process (step 1002). By executing 1002-1), a pointer set (not shown) is driven to display using the hour hand, the minute hand, and the second hand. After that, while performing the time signal reception operation (step 1002-2), it waits for the time signal to be received (step 1002-3).

  In the above state, as shown in FIG. 1, when the transmission start button 207 is operated on the radio wave table clock 2 side after the quartz wristwatch 1 is set on the radio wave table clock 2, the flowchart of FIG. As shown in the figure, the current time transmission process (step 908) is executed on the radio wave table clock 2 side. In this current time transmission process (step 908), as described above, the transistor 26 is turned on to bring the oscillation circuit 27 into the oscillation state, and the bypass switch 28 is driven by the encode signal, thereby obtaining the circuit shown in FIG. As shown, the AC signal output from the oscillation circuit 27 is modulated with a digital signal. Then, an alternating magnetic field modulated by the encode signal is generated from the transmission coil 213, and this is linked to the reception coil 105. Therefore, an electromotive force is induced from the reception coil 105 in accordance with the waveform of the encode signal, and the voltage change at that time is taken into the microcomputer 12 via the input circuit composed of the resistor 15 and the Zener diode 17. It is. At the same time, the transmission display LED 204a is driven and the transmission display lamp 204 shown in FIG. 1 is turned on.

  However, prior to executing the current time transmission process (step 908), it is determined whether the automatic reception operation is in progress (step 904). If the automatic reception operation is in progress (YES in step 904), the reception operation is interrupted. Or it stops (step 905). This is because it usually takes 2 to 3 minutes to receive the JJY radio wave, so that the time adjustment on the quartz wristwatch 1 side is prioritized by interrupting or stopping the reception. Further, prior to the current time transmission process (step 908), a transmission start time is determined by executing a timer start process (step 906). If the timer operation is completed and the elapse of the timer time is confirmed (YES in step 907), it is determined whether or not the automatic reception operation is interrupted (step 909). If the automatic reception operation is interrupted (YES in step 909), the reception operation (step 901) and the time adjustment operation (step 902) are restarted, the time adjustment is performed, and clock (timekeeping) processing (step 903) is performed. Return to). On the other hand, if the automatic reception operation is not interrupted (NO in step 909), the reception operation and the time adjustment process are not performed, and the process immediately returns to the clock (timekeeping) process (step 903).

  As described above, the radio-controlled table clock 2 is based on the crystal oscillator based on the function of generating time information based on the crystal oscillator (step 903) and the standard time information acquired by receiving the standard time radio wave (JJY radio wave). The watch 1 is set at a predetermined position in response to the operation of the transmission start button 207 or by a predetermined detector in addition to a function (steps 901 and 902) for correcting the generated time information. Trigger means (step 903-3) for generating a transmission start trigger signal in response to the detection of the signal, an electromagnetic conversion coil (power transmission coil 213), and an AC power source (oscillation circuit 27) for charging the wristwatch Encoding means (step 908) for generating an encoded signal by encoding current time information according to a predetermined encoding rule; In response to the transmission start trigger signal being generated from the ga means, the AC power supply is amplitude-modulated by the encode signal and supplied to the electromagnetic coil, so that the encode signal is cyclically transmitted on the alternating magnetic field for transmission. An electromagnetic transmission circuit (comprising a bypass switch 28 and a resistor 29) is provided.

  In addition, the radio wave table clock 2 has an indicator (transmission indicator lamp 204) indicating that the encoded signal is being electromagnetically transmitted, and when a transmission trigger signal is generated during reception of the standard time radio wave, It includes processing (steps 904 and 905) in which reception of the time radio wave is interrupted or stopped to give priority to electromagnetic transmission of the encoded signal by the electromagnetic transmission circuit.

  On the other hand, if the time signal can be received based on the setting of the quartz wristwatch 1 at the predetermined position of the radio wave table clock 2 (YES in step 1002-3), the clock (timekeeping) is based on the current time information thus obtained. The time measured by the processing (step 1002) is corrected (step 1003), and then the second hand is moved to the 0 second position and stopped for a certain time (step 1004). Thereafter, the display time is adjusted to the time measured (step 1005). . As a result, when the transmission start button 207 is operated on the radio wave table clock 2 side, the quartz wrist watch 1 is set at a predetermined position on the radio wave table clock 2 and the time of the quartz wrist watch 1 is adjusted to the accuracy of the radio wave clock. It will be automatically corrected together.

  In other words, the quartz wristwatch 1 includes a power generation unit (power receiving coil 105) that induces a voltage when energy is applied from outside without contact, and a secondary battery (secondary battery 11) that is charged with a voltage induced by the power generation unit. ), An input circuit (resistor 15 and Zener diode 17) for taking in a change in voltage induced in the power generation unit as a binary encoded signal, and a control circuit unit (microcomputer 12) fed from a secondary battery, Decoding means (steps 1002-2 and 1002-3) for acquiring current time information by decoding a binary encoded signal fetched via an input circuit according to a predetermined coding rule, and a crystal resonator A time measuring means for generating time information (step 1002), and a current time obtained by the decoding means for the time information generated by the time measuring means. It is intended to and a time adjustment means (step 1003) to correct based on the distribution.

  FIG. 11 is a diagram showing the transmission format of the encode signal given from the microcomputer 25 to the bypass switch 28, FIG. 12 is a diagram showing a specific example of the encode signal, and FIG. 13 is an explanatory diagram of the binarization rule of the encode signal. Respectively.

  As is clear from these figures, one cycle of the encode signal was assigned to 134 ms assigned to the start code, 40 ms assigned to “second”, 40 ms assigned to “minute”, and “hour”. 40 ms, 40 ms assigned to “day”, 40 ms assigned to “month / timing”, 40 ms assigned to “year”, 40 ms assigned to “winter daylight / day of week”, assigned to “parity” 40 ms and 44 ms assigned to the end code. As shown in FIG. 13, the binarization rule of the encode signal is RZ which is “1” if the state 2 ms after the rising edge of each bit is “H” and “0” if “L”. (Return to Zero) signal format. FIG. 12 shows a specific example (April 27, 2004, 13: 21: 32.5 seconds, winter time, Tuesday) expressed in accordance with such a transmission format and binarization rules. ing. In the case of an encoded signal of the above format, if the pulse width of each bit is too narrow and the combination of circuit components is difficult to follow, the pulse width should be made wider and one cycle of the encoded signal should be set longer. Those skilled in the art will readily realize this.

  Next, FIG. 14 shows an explanatory diagram (part 1) of the pointer display mode during the reception operation. As described above with reference to the flowchart, during normal hand movement (in this example, 1:25:20) (0-0), if reception is successful, the second hand display is set to 0 seconds and the time is constant. Stop (3-0), and then adjust the hand display to the received time (3-1). For this reason, it is possible to easily confirm that the reception has succeeded based on the behavior of the second hand.

  Next, FIG. 15 is a flowchart (part 2) showing the processing on the quartz wristwatch side. 15 differs from the flowchart shown in FIG. 10 in the part of signal acquisition control (steps 1502-2, 1505, 1507) from the receiving circuit (consisting of the resistor 15 and the Zener diode 17). is there. That is, in this example, only when the reception start button 106 is pressed (step 1502-2 YES), the encoded signal is read and decoded via the receiving circuit (step 1506). . According to such a configuration, even when the pseudo-encode signal is mixed into the generated voltage, the possibility of malfunction due to the pseudo-encoded signal can be reduced.

  FIG. 16 shows an explanatory diagram (No. 2) of the pointer display mode during the receiving operation corresponding to the flowchart shown in FIG. If the reception start button 106 is operated during normal hand movement (0-0) (YES in step 1502-2), the operation shifts to the reception operation unconditionally, and the second hand stops moving for a certain period of time in 30 seconds ( 2-0) (steps 1503, 1504, 1505). After that, when the reception is successful (step 1507 YES), the second hand display is set to 0 second and stopped for a certain time (3-0) (step 1509), and then the hand display is adjusted to the received time (3-1) ( Step 1510). On the other hand, if reception fails (step 1505 YES), the second hand display is not set to 0 seconds, and the hand display is immediately set to the internal clock (2-1) (step 1511). According to such a pointer display mode, it is possible to easily understand that the operation of the reception start button has been accepted, that the reception has succeeded, that the reception has failed, and the like based on the behavior of the second hand.

  Next, FIG. 17 shows a flowchart (No. 3) showing the processing on the quartz wristwatch side, and FIG. 18 shows an explanatory diagram (No. 2) of the pointer display mode during the receiving operation corresponding to the flowchart. . In the flowchart shown in FIG. 17, the difference from the flowchart shown in FIG. 15 described above is that the transition to the reception operation is prohibited unless a predetermined time has elapsed since the completion of the previous signal reading (NO in step 1703). It is in the point. According to such a configuration, even if the reception start button 106 is frequently operated, the reception operation is not performed unless a predetermined time has elapsed since the completion of the previous signal reading, so there is no need for time correction. In addition, it is possible to prevent a situation where the time adjustment process is performed unnecessarily and the secondary battery 11 is consumed.

  According to the explanatory view of the pointer display mode at the time of the reception operation shown in FIG. 18, even if the reception start button 106 is operated during normal hand movement (0-0) (step 1702-2), within the specified time. If it has already been received (NO in step 1703), the second hand is stopped at 0 seconds (1-0) (step 1710), and the internal clock immediately matches the hand display without shifting to the receiving operation. (Step 1711), the normal hand movement state is restored (1-1). The other pointer display modes are the same as in the example shown in FIG.

  In the timepiece system described above, the time information is transmitted from the radio-controlled table clock 2 to the quartz wristwatch 1 via an alternating magnetic field, but this can also be performed via an optical signal. A configuration for transmitting time information from the radio-controlled table clock 2 to the quartz wristwatch 1 through the optical signal in this manner is shown in FIGS.

  That is, FIG. 6 is a front view showing a state in which a quartz wristwatch is set on a radio-controlled timepiece, FIG. 7 is an external configuration diagram of the radio-controlled timepiece, and a circuit diagram showing the electrical hardware configuration of the timepiece system (part 2) Are shown in FIG.

  As shown in FIG. 6 (a), in this example, the solar cell 304 is attached to the surface of the dial of the quartz wristwatch 3, so that the quartz wristwatch 3 emits sunlight. It is in a state where power can be generated constantly. In the figure, 301 is a case, 302 is a reception start button, 303 is a time setting button, 304 is a solar cell, and 305 is a watch band.

  On the other hand, the configuration on the radio wave table clock 4 side is greatly different from that in the case of electromagnetic power transmission in that a light emitting element 413 and a funnel-shaped reflecting mirror 414 are provided, as particularly shown in FIG. . 6 and 7, 401 is a pedestal, 402 is a support, 403 is a main body, 404 is a transmission indicator, 405 is a time display, 406 is a date display, 407 is a transmission start button, and 408 is a transmission start button. A time setting button, 409 is a forced reception button, 410 is a mounting table part, 411 is a constriction part, 412 is a space, 413 is a light emitting element, and 414 is a funnel-shaped reflecting mirror.

  Thus, in this embodiment, as shown in FIG. 6B, the quartz wrist watch 3 is set on the mounting table 410 of the radio-controlled table clock 4 with its dial faced downward. The When the light emitting element 413 is turned on in this state, the light emitted from the light emitting element 413 is combined with the action of the reflecting mirror 414, and the solar cell 304 deposited on the dial (see FIG. 6A). ). Therefore, by controlling the intensity of light from the light emitting element 413 in two steps, the encode signal indicating the current time information can be transmitted to the quartz wristwatch 3 side.

  That is, as shown in FIG. 8, the circuit on the side of the radio-controlled table clock 4 includes a battery 41, an antenna 42, a capacitor 43, a front end circuit 44, a microcomputer (CPU) 45, and a transmission transistor 46. The LED 404a functions as a transmission indicator light, the LED 413a functions as a light emitting element for transmission, and push button switches 407a to 409a. The configurations and operations of the antenna 42, the capacitor 43, the front end circuit 44, and the microcomputer 45 are the same as those described above. The microcomputer 45 supplies an encode signal to the base of the transmission transistor 46. Therefore, both LEDs 404a and 413a are driven by the encode signal at the same time.

  On the other hand, for the circuit on the quartz wristwatch side, a secondary battery 31, a microcomputer (CPU) 32, an input circuit composed of a resistor 33 and a zener diode 35, a backflow prevention diode 34, and a light receiving diode. Solar cell 304. Note that the configuration and operation of the microcomputer 32 are the same as those described above with reference to FIGS. 10, 15, and 17.

  In particular, if the process shown in FIG. 17 is adopted, even if the pseudo-encode signal is mixed with the power generation output under the sunlight, the encoding is performed except when the reception button is pressed (step 1702-2 YES). Since the signal is not captured and decoded, the possibility of malfunction can be reduced as much as possible.

  According to the present invention, it is possible to realize a high accuracy similar to a radio-controlled timepiece by making a slight modification to an electronic wristwatch having a power generation unit such as a magnetoelectric conversion coil or a solar cell and a rechargeable secondary battery. This contributes to the widespread use of this type of electronic wristwatch.

It is a front view which shows the state by which the quartz type wristwatch was set to the electric wave clock. It is an external appearance block diagram of a radio wave clock. It is a block diagram (the 1) of a wristwatch. It is the circuit diagram (the 1) which shows the electric hardware constitutions of a timepiece system. It is a wave form diagram of the electric current which flows through a transmission coil. It is a front view which shows the state by which the quartz type wristwatch was set to the radio wave clock. It is an external appearance block diagram of a radio wave clock. It is a circuit diagram (the 2) which shows the electric hardware constitutions of a timepiece system. It is a flowchart which shows the process by the side of a radio wave clock. It is a flowchart which shows the process by the side of the quartz type wristwatch. It is a figure which shows the transmission format of an encoding signal. It is a figure which shows one specific example of an encoding signal. It is explanatory drawing of the binarization rule of an encoding signal. It is explanatory drawing (the 1) of the indicator display mode at the time of receiving operation. It is a flowchart (the 2) which shows the process by the side of a wristwatch. It is explanatory drawing (the 2) of the pointer | guide display mode at the time of receiving operation | movement. It is a flowchart (the 3) which shows the process by the side of a wristwatch. It is explanatory drawing (the 2) of the pointer | guide display mode at the time of receiving operation | movement.

Explanation of symbols

1. Quartz type wristwatch Radio wave table clock 3 Quartz type wristwatch 4 Radio wave table clock 11 Secondary battery 12 Microcomputer 13 Full wave rectifier circuit 14 Smoothing capacitor 15 Buck resistor 16 Reverse current blocking diode 17 Clipping Zener diode 21 Battery 22 Antenna 23 Capacitor 24 Front end circuit 25 Microcomputer 26 Transmission transistor 27 Oscillation circuit 28 Bypass switch 29 Resistance 31 Secondary battery 32 Microcomputer 33 Step-down resistance 34 Backflow prevention diode 35 Clipping Zener diode 41 Battery 42 Antenna 43 Capacitor 44 Front end circuit 45 Microcomputer 46 Transmission Trust transistor 101 Case 102 Cover glass 103 Back plate 104 Dial 105 Power receiving coil 106 Start button 106a, 107a push button switch 107 time setting button 108 watch band 201 pedestal part 202 support part 203 body part 204 transmission indicator lamp 204a LED for transmission indication
205 Time display unit 206 Date display unit 207 Transmission start button 208 Time setting button 209 Forced reception button 207a to 209a Push button switch 210 Mounting table 211 Constriction unit 212 Space 213 Power transmission coil 301 Case 302 Reception start button 303 Time setting button 302a , 303a push button switch 304 solar cell 305 watch band 401 pedestal part 402 support part 403 body part 404 transmission indicator light 404a transmission indicator LED
405 Time display unit 406 Date display unit 407 Transmission start button 408 Time setting button 409 Forced reception button 407a to 409a Push button switch 410 Placement unit 411 Constriction unit 412 Space 413 Light emitting element 414 Reflector 413a LED for transmission

Claims (8)

Induced in the power generation unit, a power generation unit that induces voltage by applying energy without contact from the outside, a secondary battery that is charged with a voltage induced in the power generation unit, a control circuit unit that is fed from the secondary battery, and An input circuit for taking in a change in the voltage to be obtained as a binary encoded signal,
In the control circuit section,
Decoding means for acquiring current time information by decoding a binary encoded signal captured via an input circuit according to a predetermined encoding rule;
A time measuring means for generating time information based on a reference oscillator;
An electronic wristwatch comprising: time correction means for correcting time information generated by the time measuring means based on current time information acquired by the decoding means.   The electronic wristwatch according to claim 1, wherein the power generation unit is a solar cell that induces a voltage when light is applied from the outside.   The electronic wristwatch according to claim 1, wherein the power generation unit is a magnetoelectric conversion coil that induces a voltage when an alternating magnetic field is applied from the outside. An operator for instructing time correction;
Input capture that captures a binary encoded signal through an input circuit only for a predetermined time or within a predetermined time until reception is completed, at least on the condition that the operator has been operated. The electronic wristwatch according to claim 1, further comprising a control unit.   The input capture control means is limited to the predetermined time or within the predetermined time until the reception is completed on condition that the time is not adjusted within the predetermined time in addition to the operation of the operation element. 5. The electronic wristwatch according to claim 4, wherein a binary encoded signal is taken in via an input circuit only in the meantime. A table clock having a function of generating time information based on a reference oscillator, and a function of correcting time information generated based on a reference oscillator based on standard time information acquired by receiving a standard time radio wave. ,
Trigger means for generating a transmission start trigger signal in response to a predetermined operator being operated or in response to a predetermined detector detecting that the wristwatch is set at a predetermined position;
An electromagnetic conversion coil;
AC power to charge the watch,
Encoding means for generating an encoded signal by encoding current time information according to a predetermined encoding rule;
In response to the transmission start trigger signal being generated from the trigger means, the AC power supply is amplitude-modulated by the encode signal and supplied to the electromagnetic coil, so that the encode signal is cyclically transmitted on the alternating magnetic field for power transmission. A table clock comprising an electromagnetic transmission circuit.   7. The table clock according to claim 6, further comprising a display for indicating that the encoded signal is being electromagnetically transmitted.   A table clock characterized in that when a transmission trigger signal is generated during reception of a standard time radio wave, reception of the standard time radio wave is interrupted or stopped, and electromagnetic transmission of an encoded signal by an electromagnetic transmission circuit is prioritized.

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