JP2018087766A - Electronic timepiece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress degradation of antenna reception performance in an electronic timepiece having an antenna.SOLUTION: An electronic timepiece 10 comprises an antenna body 110, a dielectric first member covering the antenna 110, biasing parts 115a for biasing the antenna body 110 to the first member to bring the antenna body into contact with the first member, a positioning part which positions the antenna body 110 in a direction crossing the biasing direction of the biasing members 115a, and a cover glass 33 which comes in contact with the rear surface of a face made contact with the antenna body 110 of the first member.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an electronic timepiece having an antenna.

  Patent Document 1 describes an electronic timepiece that displays a time by receiving a radio wave from a position information satellite such as a GPS (Global Positioning System) satellite by a ring-shaped antenna. In this electronic timepiece, a ring-shaped antenna is fixed to the main plate so as to be arranged around the dial. The ring-shaped antenna is covered with a dial ring made of plastic which is a non-conductive material. The dial ring is positioned in contact with the dial and the bezel. A space is provided between the ring-shaped antenna and the dial ring.

JP2013-181918A

  In the electronic timepiece described in Patent Document 1, the distance between the dial ring and the antenna is such that the manufacturing variations of members (dial plate and bezel) that contact the dial ring to position the dial ring, and the ground plate to which the antenna is fixed. It fluctuates due to manufacturing variations. For this reason, when the dial ring is formed of a dielectric material such as plastic or ceramic, the resonance frequency of the antenna fluctuates according to the fluctuation of the distance between the dial ring and the antenna, and the reception sensitivity of the antenna is lowered.

  The present invention has been made in view of the above-described circumstances, and an object to be solved is to suppress a decrease in reception performance of an antenna in an electronic timepiece including the antenna.

One aspect of the electronic timepiece according to the invention includes an antenna body, a dielectric member that covers the antenna body, and a biasing member that biases the antenna body toward the member to bring the antenna body into contact with the member. And a portion.
According to this aspect, since the urging unit urges the antenna body toward the member that is a dielectric, the antenna body is brought into contact with the member, so that variation in the distance between the antenna body and the member (dielectric) is suppressed. it can. Therefore, it is possible to suppress a decrease in reception sensitivity of the antenna body due to a change in the resonance frequency of the antenna according to a change in the distance between the antenna body and the member.

  In one aspect of the electronic timepiece described above, the member is preferably a dial ring. According to this aspect, it is possible to suppress a change in the distance between the antenna body and the dial ring, and it is possible to suppress a decrease in reception sensitivity of the antenna body according to the change.

  In one aspect of the electronic timepiece described above, it is preferable that the electronic timepiece further includes a positioning unit that positions the antenna body in a direction that intersects a biasing direction of the biasing unit. According to this aspect, it is possible to position the antenna body in a direction that intersects the urging direction of the urging portion while suppressing variation in the distance between the antenna body and the member.

  In one aspect of the electronic timepiece described above, it is preferable that the electronic timepiece includes a cover glass that comes into contact with a back surface of a surface of the member that contacts the antenna body. According to this aspect, it can suppress that a member receives the urging | biasing force from an urging | biasing part via an antenna body, and moves to the cover glass side.

  In the electronic timepiece described above, it is preferable that the electronic timepiece further includes a dielectric bezel, and the member is formed integrally with the bezel. According to this aspect, the positional displacement of the member with respect to the bezel can be suppressed as compared with the case where the member and the bezel are formed separately.

1 is an overall view of a GPS including an electronic timepiece according to a first embodiment. 1 is a plan view showing an electronic timepiece 10. 1 is a cross-sectional view of an electronic timepiece 10. It is a figure which shows the position adjustment part. 2 is a cross-sectional view of a part of the electronic timepiece 10. FIG. 2 is a block diagram showing a circuit configuration of the electronic timepiece 10. FIG. It is a figure showing electronic timepiece 10A concerning a 2nd embodiment. It is the figure which showed the electronic timepiece 10B which concerns on 3rd Embodiment. It is the figure which showed the modification of the urging | biasing part 115a. FIG. 10 is a cross-sectional view of a part of the electronic timepiece 10 provided with the urging unit 115a of FIG. It is the sectional view on the AA line of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the size and scale of each part are appropriately different from the actual ones. The embodiments described below are preferred specific examples of the present invention. For this reason, the technically preferable various restrictions are attached | subjected to this embodiment. However, the scope of the present invention is not limited to these forms unless otherwise specified in the following description.

<First Embodiment>
FIG. 1 is an overall view of a GPS including an antenna built-in electronic timepiece (hereinafter simply referred to as “electronic timepiece”) 10 according to a first embodiment of the present invention.
The electronic timepiece 10 is a wristwatch that receives radio waves wirelessly transmitted from the GPS satellite 8 and corrects the time measured by an internal timepiece (RTC 152 described later). The electronic timepiece 10 displays time and the like on a surface (hereinafter referred to as “front surface”) opposite to a surface that contacts the arm (hereinafter referred to as “back surface”). The GPS satellite 8 is a navigation satellite that orbits a predetermined orbit in the sky above the earth. The GPS satellite 8 transmits a 1.57542 GHz radio wave (L1 wave) on which the navigation message is superimposed to the ground. In the following description, the 1.57542 GHz radio wave on which the navigation message is superimposed is referred to as a “satellite signal”. The satellite signal is a right-handed circularly polarized wave.

  Currently, there are about 31 GPS satellites 8 (only four are shown in FIG. 1). In order to identify which GPS satellite 8 the satellite signal is transmitted from, each GPS satellite 8 superimposes a unique pattern of 1023 chips (1 ms period) called a C / A code (Coarse / Acquisition Code) on the satellite signal. Each chip is either “+1” or “−1”. For this reason, the C / A code looks like a random pattern.

  The GPS satellite 8 is equipped with an atomic clock. The satellite signal (navigation message) includes extremely accurate GPS time information measured by an atomic clock. A slight time error of the atomic clock mounted on each GPS satellite 8 is measured by the control segment on the ground. The satellite signal (navigation message) also includes a time correction parameter for correcting the time error. The electronic timepiece 10 receives a satellite signal transmitted from one GPS satellite 8, and at an accurate time (time information) obtained using GPS time information and time correction parameters included in the satellite signal, Set the time of the internal clock.

The satellite signal includes orbit information indicating the position of the GPS satellite 8 on the orbit. The electronic timepiece 10 can perform positioning calculation using GPS time information and orbit information.
The positioning calculation is performed on the assumption that a certain amount of error is included in the time measured by the internal clock of the electronic timepiece 10. That is, in addition to the x, y, and z parameters for specifying the three-dimensional position of the electronic timepiece 10, the time error is also an unknown number. Therefore, the electronic timepiece 10 generally receives satellite signals respectively transmitted from four or more GPS satellites 8, performs positioning calculation using GPS time information and orbit information included in the satellite signals, Find location information for your current location.

FIG. 2 is a plan view showing the electronic timepiece 10. FIG. 3 is a cross-sectional view of the electronic timepiece 10.
The electronic timepiece 10 includes a cylindrical outer case 31, a bezel 32, a light-transmitting cover glass 33, and a back cover 34. Of the two openings of the outer case 31, the opening on the front surface side is closed by the cover glass 33 via the bezel 32, and the opening on the back surface side is closed by the back cover 34. The outer case 31 and the back cover 34 are made of a metal such as stainless steel, titanium, aluminum, or brass. The bezel 32 is made of a ceramic that is a dielectric.

  On the inner peripheral side of the bezel 32, a ring-shaped dial ring 40 formed of plastic which is a dielectric is disposed. As shown in FIG. 2, the dial ring 40 has a time difference display unit 45 representing a time difference from Coordinated Universal Time (hereinafter referred to as “UTC”) expressed by numerals and symbols other than numerals. .

Here, UTC, time difference, standard time, and time zone will be described.
A time zone is an area that uses a common standard time. Currently, there are 40 time zones. Each time zone is distinguished by the time difference between standard time and UTC. For example, Japan belongs to the “+9 hour time zone” using standard time 9 hours ahead of UTC.
A numeric time difference display unit 45 represents an integer time difference. On the other hand, the symbol time difference display unit 45 represents a time difference other than an integer. The time of the world agreement, which is the standard for the time difference, is represented by the time difference display 45 of the “UTC” symbol. A time difference other than an integer is represented by a time difference display unit 45 of a “•” symbol. Note that the time difference other than the integer time and the world agreement may be expressed using other symbols.

  In the bezel 32, city information 35 is written. The city information 35 represents a representative city name in the time zone using the standard time corresponding to the time difference of the time difference display unit 45. In the present embodiment, the city information 35 is described using a three-letter code in which the city name is abbreviated with a three-letter alphabet. For example, the code “TYO” represents Tokyo. Then, based on the number “9” in the time difference display section 45 that is written on the dial ring 40 corresponding to the “TYO” code, the user can easily use the standard time of UTC + 9 hours in Tokyo. Can be judged.

On the inner peripheral side of the dial ring 40, a dial-shaped dial plate 11 having light transmission properties is arranged. The dial 11 is made of plastic such as polycarbonate. The dial 11 is provided with pointers 21, 22 and 23. Each of the pointers 21, 22 and 23 rotates with the pointer shaft 25 as a rotation axis. The pointer shaft 25 is provided along a central axis extending in the front and back direction through the center of the exterior case 31 in a plan view (hereinafter simply referred to as “plan view”) as viewed from the display surface 11a side of the dial plate 11. It has been.
The dial 11 and the hand 23 display the time value, and the dial 11 and the hand 22 display the time value. The hand 23 is also called an hour hand, and the hand 22 is also called a minute hand. The dial 11, the hands 22 and the hands 23 constitute a time display unit. On the dial 11, the measured value of the second digit in the chronograph (stopwatch function) is displayed by the pointer 21.

  The dial 11 has a first display portion 70 and a pointer 71 that are circular at 2 o'clock, a second display portion 80 and a pointer 81 that are circular at 10 o'clock, and a third display portion that is circular at 6 o'clock. 90 and the pointer 91 are provided with a rectangular calendar display section 15 in the 4 o'clock direction.

The 1st display part 70 displays the measured value to 60 minutes with the pointer | guide 71 in a chronograph. The second display unit 80 displays the second value of the time with the hands 81. The pointer 81 is also referred to as a second hand.
On the outer periphery of the third display portion 90 in the range from the 7 o'clock direction to the 9 o'clock direction, a symbol 92 is written along the circumference, with the base end in the 9 o'clock direction being thick and the tip in the 7 o'clock direction being thin. . A symbol 92 is a power indicator of the secondary battery 130. Depending on the remaining amount of the secondary battery 130, the pointer 91 indicates one of the proximal end, the distal end, and the middle of the symbol 92. For example, a rechargeable lithium ion battery is used as the secondary battery 130.
On the outer periphery of the third display portion 90 in the range from 9 o'clock to 10 o'clock, an airplane-shaped symbol 93 is written. Symbol 93 represents an in-flight mode. When aircraft take off and landing, the reception of satellite signals is prohibited by the Aviation Law. The user can stop receiving the satellite signal by the electronic timepiece 10 by operating the button 61 and selecting the symbol 93 (airplane mode) with the hands 91.

  On the side surface of the outer case 31, on the dial 11, a button 61 at the 8 o'clock position, a button 62 at the 10 o'clock position, a button 63 at the 2 o'clock position, a button 64 at the 4 o'clock position, and A crown 50 is provided at a position in the 3 o'clock direction. When each of the buttons 61, 62, 63 and 64 and the crown 50 is operated, an operation signal corresponding to the operation is output. A drive mechanism 140 that drives the hands 22 and 23 and the like is also provided inside the outer case 31.

  The drive mechanism 140 is attached to the main plate 125. The base plate 125 is disposed on the back cover 34 side of the dial 11 inside the outer case 31. A ground plate receiving ring 126 is disposed on the outer periphery of the ground plate 125, and the ground plate 125 is fixed to the exterior case 31 via the ground plate receiving ring 126. Between the main plate 125 and the dial plate 11, a solar panel 135 that is a solar power generation device that performs photovoltaic power generation is provided. The solar panel 135 is a circular flat plate in which a plurality of solar cells (photovoltaic elements) that convert light energy into electric energy (electric power) are connected in series. The solar panel 135 also has a sunlight detection function. The secondary battery 130 is charged with electric power generated by the solar panel 135. The dial 11, the solar panel 135, and the ground plate 125 are formed with a hole through which the pointer shaft 25 passes and an opening of the calendar display unit 15.

  The drive mechanism 140 is covered from the back cover 34 side by the circuit board 120 in a state of facing the surface 120a of the circuit board 120 on the dial plate 11 side. The drive mechanism 140 includes a step motor for driving the pointer 21, a step motor for driving the pointer 22 and the pointer 23, a step motor for driving the pointer 71, a step motor for driving the pointer 81, and a step for driving the pointer 91. A motor and a step motor for driving a date wheel for displaying the date on the calendar display unit 15 are provided.

  The circuit board 120 is disposed between the dial 11 and the back cover 34. A GPS receiving unit (receiving module) 122 and a control unit 150 are mounted on the surface 120b of the circuit board 120 on the back cover 34 side. Further, a circuit retainer 123 that covers the GPS receiver 122 and the controller 150 is provided between the circuit board 120 and the back cover 34. A magnetic-resistant plate 160 is provided between the circuit board 120 and the circuit holder 123.

  The dial ring 40 is an example of a dielectric member that covers the antenna body 110. The dial ring 40 includes a flat plate portion 40a provided in parallel to the cover glass 33, and an inclined portion 40b inclined from the inner periphery of the flat plate portion 40a to the dial plate 11 side. The outer peripheral end of the flat plate portion 40 a is in contact with the inner peripheral surface of the bezel 32, and the inner peripheral end of the inclined portion 40 b is in contact with the dial 11. The dial ring 40 has a ring shape in plan view. The dial ring 40 has a mortar shape in a cross-sectional view (hereinafter simply referred to as “cross-sectional view”) viewed from a direction parallel to the in-plane direction of the dial 11 (display surface 11a).

  A cylindrical storage space is formed by the flat plate portion 40a, the inclined portion 40b, the inner peripheral surface of the bezel 32, the base plate receiving ring 126, and the like. In this storage space, a cylindrical antenna body (ring antenna) 110 and a position adjusting unit 115 are provided.

  The antenna body 110 includes a base body 110a formed of an annular dielectric body surrounding the outer periphery of the dial plate 11, and a ring-shaped antenna electrode 110b installed on the base body 110a. The dielectric can be formed by mixing a dielectric material such as titanium oxide with a resin. The antenna electrode 110b can be formed by plating or silver paste printing a metal antenna pattern on the base 110a.

FIG. 4 is a diagram showing the position adjustment unit 115. The position adjustment unit 115 has a ring shape in plan view, and is fixed to the surface of the ground plane receiving ring 126 on the antenna body 110 side. The position adjustment unit 115 is provided with an urging unit 115 a that urges the antenna body 110 toward the dial ring 40 to bring the antenna body 110 into contact with the dial ring 40. The position adjustment unit 115 is made of, for example, metal, and the urging unit 115a is bent toward the dial ring 40 and functions as a spring unit. For this reason, the antenna body 110 that comes into contact with the urging portion 115 a is pressed toward the dial ring 40 by the elastic force of the urging portion 115 a and comes into contact with the dial ring 40. Therefore, the distance between the antenna body 110 and the dial ring 40 which is a dielectric can be made constant, and the distance between the antenna electrode 110b and the dial ring 40 can be made constant. Therefore, fluctuations in the resonance frequency of the antenna body 110 can be suppressed, and a decrease in reception sensitivity of the antenna body 110 can be suppressed.
Here, the antenna electrode 110b may be disposed, for example, on the inner surface or the outer surface of the base 110a. However, if the antenna electrode 110b is disposed on the surface of the base 110a that is in contact with the dial ring 40, variation in the distance between the antenna electrode 110b and the dial ring 40 due to manufacturing variations of the base 110a can be suppressed. More preferred.
The urging portion 115a is provided at four positions, a 12 o'clock position, a 3 o'clock position, a 6 o'clock position, and a 9 o'clock position in plan view. The number and installation positions of the urging portions 115a can be changed as appropriate.

  As shown in FIG. 4, the position adjusting unit 115 is also provided with a through hole 115b. As shown in FIG. 5, a recess 110 c is provided at a location facing the through hole 115 b of the antenna body 110. The ground plane receiving ring 126 is provided with a protruding portion 126a at a location facing the through hole 115b and the recessed portion 110c. The protrusion 126a is an example of a positioning part. The protrusion 126a passes through the through hole 115b and is fitted into the recess 110c. For this reason, the protrusion 126a has a direction intersecting with the urging direction of the urging portion 115a (the Y-axis direction from the back surface to the front surface) (for example, the X axis that is parallel to the in-plane direction of the dial plate 11 and perpendicular to the Y axis). The antenna body 110 is positioned in the direction). The length of the protrusion 126a toward the cover glass 33 is such that the protrusion 126a is recessed when the antenna body 110 is biased by the biasing portion 115a and the antenna body 110 is in contact with the dial ring 40. It is set not to contact the bottom 110c1 of 110c.

Further, the base 110a is provided with a hook portion 110d, and the base plate receiving ring 126 is provided with a support portion 126c for supporting the hook portion 126b. The hook portion 126b is supported by the support portion 126c so as to be positioned closer to the cover glass 33 than the hook portion 110d. The hook portion 110d and the hook portion 126b are arranged in a positional relationship that does not engage when the antenna body 110 is in contact with the dial ring 40. The distance at which the hook portion 110d and the hook portion 126b are separated (the distance in the Y-axis direction from the back surface to the front surface) is to prevent the protruding portion 126a from coming out of the concave portion 110c due to dropping of the electronic timepiece 10 or the like. In addition, the distance from which the protrusion 126a enters the recess 110c (that is, the distance in the Y-axis direction from the surface on the antenna body 110 side of the protrusion 126a to the surface on the back side of the antenna body 110) is shorter.
The hook part 110d and the hook part 126b are temporarily attached so that the antenna body 110 is not detached from the main plate receiving ring 126 when the dial ring 40 is not present, that is, when the movement is not fixed to the outer case 31 at the time of manufacture. It is provided for fixing.

Next, the electrical configuration of the electronic timepiece 10 will be described.
FIG. 6 is a block diagram showing a circuit configuration of the electronic timepiece 10. As shown in FIG. 6, the electronic timepiece 10 includes a GPS receiving unit 122, a control display unit 155, a charging control circuit 29, and a solar panel 135. Further, the electronic timepiece 10 has a secondary battery 130 built therein.
The GPS receiver 122 performs processing such as reception of satellite signals, acquisition of GPS satellites 8, and generation of position information. The control display unit 155 performs processing such as holding internal time information and correcting internal time information. The solar panel 135 charges the secondary battery 130 through the charge control circuit 29.

Electronic timepiece 10 also includes regulators 162 and 163 and voltage detection circuit 164.
The secondary battery 130 supplies driving power to the control display unit 155 via the regulator 162 and supplies driving power to the GPS receiving unit 122 via the regulator 163. Instead of the regulator 163, for example, a regulator 163-1 that supplies driving power to an RF unit 170 described later, and a regulator 163-2 (both not shown) that supplies driving power to a baseband unit 180 described later. May be provided. The regulator 163-1 may be provided inside the RF unit 170. The voltage detection circuit 164 detects the voltage of the secondary battery 130.

The electronic timepiece 10 also includes an antenna body 110 and a SAW (Surface Acoustic Wave) filter 190.
As described above, the antenna body 110 receives satellite signals wirelessly transmitted from the plurality of GPS satellites 8. The antenna body 110 also receives unnecessary radio waves other than satellite signals. For this reason, the SAW filter 190 extracts a satellite signal from the signal received by the antenna body 110. That is, the SAW filter 190 functions as a band-pass filter that passes a 1.5 GHz band signal. Note that the SAW filter 190 may be incorporated in the GPS receiving unit 122.

  The GPS receiving unit 122 includes an RF (Radio Frequency) unit 170 and a baseband unit 180. The GPS receiving unit 122 acquires satellite information such as orbit information and GPS time information included in the navigation message from the 1.5 GHz band satellite signal extracted by the SAW filter 190.

  The RF unit 170 includes an LNA (Low Noise Amplifier) 171, a mixer 172, a VCO (Voltage Controlled Oscillator) 173, a PLL (Phase Locked Loop) circuit 174, an IF amplifier 175, an IF (Intermediate Frequency) filter 176, and an ADC (ADC). A / D converter) 177 and the like.

The satellite signal extracted by the SAW filter 190 is amplified by the LNA 171. The satellite signal amplified by the LNA 171 is mixed with the clock signal output from the VCO 173 by the mixer 172 and down-converted to an intermediate frequency band signal.
The PLL circuit 174 compares the phase of the clock signal obtained by dividing the output clock signal of the VCO 173 with the reference clock signal, and synchronizes the output clock signal of the VCO 173 with the reference clock signal. As a result, the VCO 173 can output a clock signal with a stable frequency accuracy of the reference clock signal. For example, several MHz can be selected as the intermediate frequency.

  The signal mixed by the mixer 172 is amplified by the IF amplifier 175. Here, by the mixing in the mixer 172, a high frequency signal of several GHz is generated together with the signal in the intermediate frequency band. Therefore, the IF amplifier 175 amplifies a high frequency signal of several GHz together with the intermediate frequency band signal. The IF filter 176 passes a signal in the intermediate frequency band and removes a high frequency signal of several GHz (precisely, attenuates to a predetermined level or less). The intermediate frequency band signal that has passed through the IF filter 176 is converted into a digital signal by the ADC 177.

  The baseband unit 180 includes a DSP (Digital Signal Processor) 181, a CPU 182, and a RAM (Random Access Memory) 183. The baseband unit 180 is connected to a crystal oscillation circuit with temperature compensation circuit (TCXO: Temperature Compensated Crystal Oscillator) 185, a flash memory 186, and the like.

A crystal oscillation circuit (TCXO) 185 with a temperature compensation circuit generates a reference clock signal having a substantially constant frequency regardless of the temperature.
The flash memory 186 stores, for example, time difference information (time difference information for UTC) associated with positioning information (latitude and longitude). The flash memory 186 stores a program that defines the operation of the baseband unit 180.
The CPU 182 controls the baseband unit 180, more specifically, the GPS receiving unit 122, by reading and executing a program stored in the flash memory 186. Instead of the flash memory 186, an EEPROM (Electrically Erasable Programmable Read-Only Memory) may be used.

  The baseband unit 180 demodulates the baseband signal from the digital signal (intermediate frequency band signal) converted by the ADC 177 of the RF unit 170.

  The baseband unit 180 generates a local code having the same pattern as each C / A code in a satellite search described later, and correlates each C / A code included in the baseband signal with the local code. Then, the baseband unit 180 adjusts the local code generation timing so that the correlation value for each local code has a peak. If the correlation value is equal to or greater than the threshold value, the baseband unit 180 is synchronized with the GPS satellite 8 of the local code (that is, , GPS satellite 8 is captured). Here, the GPS system employs a CDMA (Code Division Multiple Access) method in which all GPS satellites 8 transmit satellite signals of the same frequency using different C / A codes. Therefore, by detecting the C / A code included in the received satellite signal, the GPS satellite 8 that can be captured can be searched.

In addition, the baseband unit 180 mixes a local code and a baseband signal having the same pattern as the C / A code of the GPS satellite 8 in order to acquire satellite information of the captured GPS satellite 8. In the mixed signal, the navigation message including the satellite information of the captured GPS satellite 8 is demodulated. Then, the baseband unit 180 detects the TLM word (preamble data) of each subframe of the navigation message, and acquires satellite information such as orbit information and GPS time information included in each subframe. Then, the baseband unit 180 stores the satellite information in the RAM 183. The GPS time information is week number data (WN) and Z count data, but if week number data has been acquired previously, only Z count data may be acquired.
The week number data is information representing a week including the current GPS time information. The starting point of the GPS time information is UTC, January 6, 1980, 00:00:00, and the week starting on this day is the week number 0. Week number data is updated on a weekly basis.
The Z count data indicates the elapsed time from 0:00 every Sunday in seconds, and returns to 0 at 0:00 on the next Sunday. That is, the Z count data is information in units of seconds indicated every week from the beginning of the week.
Hereinafter, an example in which Z count data is used as GPS time information will be described.

The baseband unit 180 has a time information acquisition mode and a position information acquisition mode.
In the time information acquisition mode, the baseband unit 180 performs time measurement calculation based on the GPS time information (Z count data).
In the position information acquisition mode, the baseband unit 180 performs positioning calculation based on the GPS time information and the orbit information, and acquires position information (latitude and longitude of the place where the electronic timepiece 10 is located at the time of reception). Subsequently, the baseband unit 180 refers to the flash memory 186 and acquires time difference information associated with the coordinate values (for example, latitude and longitude) of the electronic timepiece 10 specified by the position information.

  The operation of the baseband unit 180 is synchronized with a reference clock signal output from a crystal oscillation circuit with temperature compensation circuit (TCXO) 185.

The control display unit 155 includes a control unit 150, a drive circuit 154, and a crystal resonator 153.
The control unit 150 includes a storage unit 151 and an RTC 152 and performs various controls. The control unit 150 can be configured by a CPU, for example. The controller 150 sends a control signal to the GPS receiver 122 and controls the reception operation of the GPS receiver 122. Further, the control unit 150 controls the operations of the regulator 162 and the regulator 163 based on the detection result of the voltage detection circuit 164.
Further, the control unit 150 controls the driving of the hands 21, 22, 23, 71, 81 and 91 and the date indicator via the drive circuit 154. The drive circuit 154 includes a drive circuit for the hands 21, a drive circuit for the hands 22 and 23, a drive circuit for the hands 71, a drive circuit for the hands 81, a drive circuit for the hands 91, And a driving circuit for a vehicle.

  The storage unit 151 stores information (Z count data and time difference information) generated by the baseband unit 180. The control unit 150 corrects the internal time information based on the information generated by the baseband unit 180. The internal time information is information on the internal time measured by the electronic timepiece 10. The internal time information is counted by the RTC 152 that is always driven, and is updated by the reference clock signal generated by the crystal resonator 153. Therefore, even when the power supply to the GPS receiver 122 is stopped, the internal time information can be updated and the hands of the hands 22, 23 and 81 can be continued.

  In the time information acquisition mode, the control unit 150 operates the GPS reception unit 122, corrects the internal time information based on the GPS time information (Z count data), and stores it in the storage unit 151. More specifically, the internal time information is corrected to a time obtained by adding a UTC offset to the acquired GPS time information.

  In the position information acquisition mode, the control unit 150 operates the GPS receiving unit 122 and performs positioning calculation using satellite signals. And the control part 150 corrects internal time information based on the time difference information according to the positioning calculation result, and memorize | stores it in the memory | storage part 151. FIG.

  According to the present embodiment, since the variation in the distance between the antenna body 110 and the dial ring 40 that is a dielectric material is suppressed, the reception sensitivity of the antenna body 110 is stabilized, and the time measurement and positioning accuracy based on the satellite signal are improved. Reduction can be suppressed.

Second Embodiment
FIG. 7 is a view showing an electronic timepiece 10A according to the second embodiment of the present invention. 7, the same components as those shown in FIG. 3 are denoted by the same reference numerals. 7 differs from the electronic timepiece 10 shown in FIG. 3 in that the flat plate portion 40a of the dial ring 40 is in contact with the cover glass 33. The electronic timepiece 10A shown in FIG.
In the electronic timepiece 10 </ b> A, since the back surface of the dial ring 40 that contacts the antenna body 110 is in contact with the cover glass 33, the dial ring 40 moves from the biasing portion 115 a to the cover glass 33 side via the antenna body 110. It can suppress moving to the cover glass 33 side in response to the urging force.

<Third Embodiment>
FIG. 8 is a diagram showing an electronic timepiece 10B according to the third embodiment of the present invention. In FIG. 8, the same components as those shown in FIG. The electronic timepiece 10B shown in FIG. 8 differs from the electronic timepiece 10A shown in FIG. 7 in that the dial ring 40 and the bezel 32 are integrally formed of a dielectric (for example, ceramic or plastic).
In the electronic timepiece 10B, the dial ring 40 and the bezel 32 are integrally formed of a dielectric. For this reason, compared with the case where the dial ring 40 and the bezel 32 are formed separately, the positional deviation of the dial ring 40 (for example, the positional deviation of the dial ring 40 with respect to the bezel 32) can be suppressed.

<Modification>
The present invention is not limited to the above-described embodiments. For example, various modifications as described below are possible. Further, one or a plurality of modifications arbitrarily selected from the modifications described below can be appropriately combined.

<Modification 1>
FIG. 9 is a view showing a modification of the urging portion 115a. FIG. 10 is a cross-sectional view of a part of the electronic timepiece 10 provided with the urging portion 115a shown in FIG. 11 is a cross-sectional view taken along line AA in FIG.
The urging portion 115a shown in FIGS. 3 and 4 extends along the direction extending from the center of the position adjusting portion 115 to the outer periphery in plan view, but the urging portion 115a shown in FIG. It extends along the circumferential direction of the portion 115. In the present modification, the position adjusting unit 115 and the ground plane receiving ring 126 are integrally formed of plastic, for example, POM (polyacetal).
Also in this modified example, the urging unit 115a suppresses a change in the distance between the antenna body 110 and the dial ring 40, which is a dielectric, so that the reception sensitivity of the antenna body 110 is stable, and the time measurement based on the satellite signal is possible. A decrease in positioning accuracy can be suppressed.

<Modification 2>
In each of the above embodiments, the base 110a is provided with the recess 110c and the base plate receiving ring 126 is provided with the protrusion 126a. However, the base 110a may be provided with the protrusion 126a and the base plate receiving ring 126 may be provided with the recess 110c. .

<Modification 3>
In at least one of the first embodiment and the second embodiment, the dial ring 40 may be formed of ceramic.

<Modification 4>
The main plate 125 and the main plate receiving ring 126 may be integrally formed. Further, the base plate 125, the base plate receiving ring 126, and the position adjusting unit 115 may be integrally formed of an elastic material (for example, plastic).

<Modification 5>
In at least one of the first embodiment and the second embodiment, the dial ring 40 and the bezel 32 may be integrally formed of a dielectric (for example, ceramic or plastic).

<Modification 6>
All or part of the first display unit 70, the second display unit 80, the third display unit 90, and the calendar display unit 15 may be omitted.

<Modification 7>
Although the GPS satellite has been described as an example of the position information satellite, the position information satellite is not limited to this. For example, as the position information satellite, a satellite used in other global public navigation satellite systems (GNSS) such as Galileo (EU) and GLONASS (Russia) can be applied. Also, a geostationary satellite such as a geostationary satellite type satellite navigation augmentation system (SBAS) or a satellite such as a regional satellite positioning system (RNSS) that can be searched only in a specific region such as a quasi-zenith satellite (MICHIBIKI) can be applied.

DESCRIPTION OF SYMBOLS 10 ... Electronic timepiece, 110 ... Antenna body, 40 ... Dial ring, 115 ... Position adjustment part, 115a ... Energizing part, 126 ... Base plate receiving ring.

Claims (5)

An antenna body,
A dielectric member covering the antenna body;
An electronic timepiece comprising: an urging portion that urges the antenna body toward the member to bring the antenna body into contact with the member.   The electronic timepiece according to claim 1, wherein the member is a dial ring.   3. The electronic timepiece according to claim 1, further comprising a positioning portion that positions the antenna body in a direction that intersects a biasing direction of the biasing portion.   4. The electronic timepiece according to claim 1, further comprising a cover glass that contacts a back surface of a surface of the member that contacts the antenna body. 5. Further comprising a dielectric bezel,
The electronic timepiece according to any one of claims 1 to 4, wherein the member is formed integrally with the bezel.

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