JP6323532B2 - Electronic clock with built-in antenna - Google Patents

Description

  The present invention relates to an electronic timepiece with a built-in antenna.

  In recent years, analog electronic watches that receive radio waves from position information satellites such as GPS (Global Positioning System) satellites and display accurate time have been developed. An analog electronic timepiece includes a pointer that rotates around a pointer shaft, a drive unit that includes a gear and a step motor to drive the pointer, and an annular antenna that receives radio waves from a position information satellite (patent) Reference 1). In general, an analog electronic timepiece includes a magnetic-resistant plate for magnetically shielding the step motor in order to prevent the step motor from malfunctioning due to the influence of a magnetic field.

JP 2011-21929 A

  A magnetic shield, which is a magnetic shield, absorbs electromagnetic waves including radio waves from the position information satellite. Therefore, when a magnetic-resistant plate is provided in the vicinity of the antenna, radio waves from the position information satellite to be received by the antenna are absorbed by the magnetic-resistant plate, so that it is difficult for the antenna to ensure good radio wave reception performance.

  The present invention has been made in view of the above-described circumstances. In an electronic timepiece with a built-in antenna including a drive unit, a magnetic-resistant plate provided so as to overlap the drive unit, and an antenna, the antenna has good reception performance. Ensuring is a solution issue.

In order to solve the above-described problems, an electronic timepiece with built-in antenna according to the present invention includes an exterior case, an annular antenna body housed in the exterior case, an inner side of the antenna body, and displays time A possible time display unit, a drive unit that is housed in the exterior case and drives the time display unit, and a magnetic-resistant plate that is provided so as to overlap part or all of the drive unit when viewed in plan. And a part or all of the antenna body does not overlap the magnetically resistant plate when viewed in a plan view.
When a magnetic-resistant plate is arrange | positioned in the vicinity of an antenna body, since the electromagnetic wave which an antenna body should receive is interrupted by a magnetic-resistant plate, the receiving performance of an antenna body falls. According to the present invention, since part or all of the antenna body is provided at a position where it does not overlap with the magnetically resistant plate in plan view, compared to the case where the entire antenna body is provided at a position where it overlaps with the magnetically resistant plate when viewed in plan. Thus, the distance between the antenna body and the magnetic plate can be increased. For this reason, it becomes possible for the antenna body to ensure good reception performance. Here, “inside the antenna body” is the direction of the central axis of the ring of the antenna body, and is an area surrounded by the ring of the antenna body when viewed in plan. Further, “plan view” means that the antenna built-in electronic timepiece is viewed from the extending direction of the central axis of the ring of the antenna body.

An electronic timepiece with built-in antenna according to the present invention includes an exterior case, an annular antenna body housed in the exterior case, and a time display unit that is arranged inside the antenna body and can display the time. When viewed in plan, a ground plate accommodated in the exterior case, a drive portion that is accommodated in the exterior case and provided on the opposite side of the antenna body from the ground surface, and drives the time display unit And a first anti-magnetic plate provided between the drive unit and the ground plane so as to overlap a part or all of the drive unit, and the antenna body when viewed in plan, It does not overlap with the board.
When a magnetic-resistant plate is arrange | positioned in the vicinity of an antenna body, since the electromagnetic wave which an antenna body should receive is interrupted by a magnetic-resistant plate, the receiving performance of an antenna body falls. Since the magnetic-resistant plate is provided to shield the drive unit from the magnetic field emitted from the outside of the drive unit, in general, both sides of the drive unit, that is, the ground plane side when viewed from the drive unit, and the drive unit It is often provided on the opposite side of the main plate. The magnetic-resistant plate provided on the ground plate side when viewed from the driving unit is located closer to the antenna body than the magnetic-resistant plate provided on the side opposite to the ground plate when viewed from the driving unit. Therefore, the magnetic resistant plate provided on the ground plate side as viewed from the driving unit has a greater influence on the reception performance of the antenna body than the magnetic resistant plate provided on the side opposite to the ground plate as viewed from the driving unit.
According to the present invention, the antenna body is provided at a position where it does not overlap with the first magnetic-resistant plate, which is a magnetic-resistant plate provided on the ground plate side when viewed from the drive unit, when viewed in plan. Therefore, the distance from the first magnetic-resistant plate that has a great influence on the reception performance of the antenna body can be made longer than when the antenna body is provided at a position overlapping the first magnetic-resistant plate in plan view. it can. For this reason, the antenna body provided in the electronic timepiece with built-in antenna according to the present invention can ensure good reception performance.

In addition, the electronic timepiece with built-in antenna described above includes a second magnetically resistant plate provided on the side opposite to the ground plate when viewed from the drive unit so as to overlap a part or all of the drive unit when viewed in plan. It is preferable that the antenna body does not overlap the second magnetically resistant plate when viewed in plan.
According to this aspect, since the antenna body is provided at a position that does not overlap the second magnetically resistant plate in plan view, the antenna body is compared with a case where the antenna body is provided at a position that overlaps with the second magnetically resistant plate when viewed in plan. The distance between the body and the second magnetically resistant plate can be increased. For this reason, the antenna body with which the antenna built-in type electronic timepiece according to this aspect is provided can ensure good reception performance.

The above-described electronic timepiece with built-in antenna has a cover glass that covers one of the two openings of the exterior case and protects the time display unit, and a back that closes the other of the two openings. A lid, and the time display unit includes a dial plate provided between the cover glass and the base plate, and the distance between the back lid and the dial plate is determined by the back lid and the antenna body. It is preferable that the distance is longer than the distance.
In general, an antenna body can exhibit good reception performance when the cross-sectional area of the antenna body is large. According to this aspect, since the antenna body is formed so as to sink deeper into the back cover side than the dial plate, the antenna body is compared with the case where the antenna body is formed shallower on the cover glass side than the dial plate. The length in the front and back direction can be increased. As a result, the cross-sectional area of the antenna body can be increased, and the antenna body can ensure good reception performance.

Further, the antenna body is provided on the inner periphery of the antenna body, and has an inclined surface that moves away from the back cover toward the center of the antenna body, and the dial is inclined when viewed in plan. It is preferable that it overlaps at least a part of the surface.
According to this aspect, since the dial is provided so as to overlap a part of the antenna body in plan view, the size of the dial is increased as compared with the case where the dial is provided not to overlap the antenna body. can do. For this reason, it becomes possible to improve the visibility of the dial plate by the user of the electronic timepiece with a built-in antenna.

The electronic timepiece with built-in antenna described above includes a ground of the antenna body provided between the antenna body and the ground plane, and the exterior case is formed of a conductive material, and is electrically connected to the ground. It is preferable that a case cylinder is provided, and the back cover is made of a conductive material and is electrically connected to the case cylinder.
According to this aspect, the ground, the case body, and the back cover function as a ground plane of the antenna body. Since the case body and the back cover have a large volume and area in the electronic timepiece with a built-in antenna, the antenna body is compared with the case where only the ground functions as the ground plane of the antenna body without the case body and the back cover. The ground potential can be stabilized. For this reason, the antenna body with which the antenna built-in type electronic timepiece according to this aspect is provided can ensure good reception performance.

Further, the above-described electronic timepiece with built-in antenna includes a battery housing portion that houses a secondary battery that supplies power to the antenna body, and the antenna body does not overlap the battery housing portion when seen in a plan view. preferable.
When the secondary battery is disposed in the vicinity of the antenna body, radio waves to be received by the antenna body are blocked by the secondary battery, so that the reception performance of the antenna body is deteriorated. According to the present invention, the antenna body is provided at a position where it does not overlap with the secondary battery in plan view, and therefore, compared with the case where the antenna body is provided at a position where it overlaps with the secondary battery in plan view, The distance between the secondary batteries can be increased. For this reason, the antenna body provided in the electronic timepiece with built-in antenna according to the present invention can ensure good reception performance.

1 is an overall view of a GPS system including an antenna built-in electronic timepiece 100 (electronic timepiece 100) according to an embodiment of the present invention. 2 is a plan view of the electronic timepiece 100. FIG. 2 is a partial cross-sectional view of the electronic timepiece 100. FIG. 2 is an exploded perspective view of a part of the electronic timepiece 100. FIG. FIG. 4 is an explanatory diagram for explaining a shape of an antenna body 40 of the electronic timepiece 100 and an antenna pattern formed on the antenna body 40. 2 is a partial cross-sectional view of the electronic timepiece 100. FIG. 4 is an explanatory diagram for explaining a positional relationship among an antenna body 40, a power feed pin 44, and a secondary battery 27 of the electronic timepiece 100. FIG. 4 is an explanatory diagram for explaining a positional relationship among an antenna body 40, a power feed pin 44, a magnetic plate S1, a magnetic plate S2, and a magnetic plate S3 of the electronic timepiece 100. FIG. 4 is an explanatory diagram for explaining a positional relationship among an antenna body 40, a power feed pin 44, a magnetic plate S1, and a magnetic plate S2 of the electronic timepiece 100. FIG. 4 is an explanatory diagram for explaining a positional relationship among an antenna body 40, a power feed pin 44, and a magnetically resistant plate S3 of the electronic timepiece 100. FIG. It is explanatory drawing for demonstrating the relationship between the reception performance of the antenna body 40 of the electronic timepiece 100, and the magnetic-resistant plates S1-S3. 2 is a block diagram showing a circuit configuration of the electronic timepiece 100. FIG. 10 is a partial cross-sectional view of an electronic timepiece 100a according to Modification 2. FIG. 10 is an explanatory diagram for explaining an antenna body 40a according to Modification 6. FIG. 10 is an explanatory diagram for explaining an antenna body 40b according to Modification 7. FIG. It is a perspective view of the antenna body 40c which concerns on the modification 7. FIG. It is a perspective view of the antenna body 40d which concerns on the modification 7. FIG. It is a partial cross section figure of antenna body 40e concerning modification 8. It is a partial cross section figure of antenna body 40f concerning modification 9. 10 is a partial cross-sectional view of an antenna body 40g according to Modification 9. FIG. 14 is a plan view of an antenna body 40h according to Modification 10. FIG.

  Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. However, in each figure, the size and scale of each part are appropriately changed from the actual ones. Further, since the embodiments described below are preferable specific examples of the present invention, various technically preferable limitations are attached thereto. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these forms.

<A: Mechanical structure of an electronic timepiece with built-in antenna>
FIG. 1 is an overall view of a GPS system including an electronic timepiece 100 with a built-in antenna (hereinafter referred to as “electronic timepiece 100”) according to an embodiment of the present invention. The electronic timepiece 100 is a wristwatch that receives radio waves (radio signals) from at least one of a plurality of GPS satellites 20 and corrects the internal time, and is opposite to a surface that contacts an arm (hereinafter referred to as “back surface”). The time is displayed on the surface (hereinafter referred to as “surface”).

The GPS satellite 20 is a position information satellite that orbits a predetermined orbit over the earth, and transmits a navigation message superimposed on a 1.57542 GHz radio wave (L1 wave) 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.
In the present embodiment, the electronic timepiece 100 receives radio waves from the GPS satellite 20 included in the GPS system, but the GPS system is an example of a satellite positioning system. In addition to the GPS system, the present invention provides a global navigation satellite system (GNSS) such as Galileo (EU), GLONASS (Russia), Hokuto (China), a geostationary satellite such as SBAS, or a quasi-zenith satellite. Satellite positioning systems other than GPS systems can be used that include position information satellites that transmit satellite signals containing information. That is, the electronic timepiece 100 may be a wristwatch that receives radio waves (radio signals) from position information satellites including satellites other than the GPS satellites 20 and corrects the internal time.

  Currently, there are about 31 GPS satellites 20 (in FIG. 1, only four of the 31 satellites are shown). Each GPS satellite 20 superimposes a unique pattern of 1023 chips (1 ms period) called a C / A code (Coarse / Acquisition Code) on the satellite signal in order to identify which GPS satellite 20 the satellite signal is transmitted from. . The C / A code looks like a random pattern with each chip being either +1 or -1. Therefore, by correlating the satellite signal and the pattern of each C / A code, the C / A code superimposed on the satellite signal can be detected.

  The GPS satellite 20 is equipped with an atomic clock, and the satellite signal includes extremely accurate time information (hereinafter referred to as “GPS time information”) measured by the atomic clock. Further, a slight time error of the atomic clock mounted on each GPS satellite 20 is measured by a control segment on the ground, and the satellite signal includes a time correction parameter for correcting the time error. The electronic timepiece 100 receives a satellite signal transmitted from one GPS satellite 20, and corrects the internal time to an accurate time by using GPS time information and a time correction parameter included therein.

  The satellite signal includes orbit information indicating the position of the GPS satellite 20 on the orbit. The electronic timepiece 100 can perform positioning calculation using GPS time information and orbit information. The positioning calculation is performed on the assumption that the internal time of the electronic timepiece 100 includes some error. That is, in addition to the three parameters for specifying the three-dimensional position of the electronic timepiece 100, the time error is also an unknown number. Therefore, the electronic timepiece 100 generally receives satellite signals respectively transmitted from four or more GPS satellites, and performs positioning calculation using GPS time information and orbit information included therein.

FIG. 2 is a plan view of the electronic timepiece 100. As shown in FIG. 2, the electronic timepiece 100 includes an exterior case 80. The exterior case 80 is configured by fitting a glass edge 82 formed of ceramic or other non-conductive material to a cylindrical case body 81 formed of metal or other conductive material. In the present embodiment, the outer case 80 is composed of two parts, but may be composed of one part.
A disc-shaped dial 11 is arranged on the inner peripheral side of the glass edge 82 via a ring-shaped dial ring 83 made of plastic or other non-conductive material. On the dial plate 11, hands 13 (13 a to 13 c) are arranged around the pointer shaft 12 to indicate the current time.

Further, as shown in FIG. 2, a small clock 14 and an indicator 15 are arranged on the dial 11.
The small timepiece 14 includes hands 142 and 143 that are rotatable about a shaft 141. The hands 142 and 143 indicate the current time in a region predetermined by the user of the electronic timepiece 100. That is, the electronic timepiece 100 includes the hands 13 and the hands 142 and 143, so that the current time in two areas can be displayed simultaneously.
The indicator 15 includes a pointer 152 that can rotate around a shaft 151. The pointer 152 is a mode executed by the electronic timepiece 100 when the electronic timepiece 100 is receiving a satellite signal (that is, which one of the time information acquisition mode and the position information acquisition mode is executed). When the satellite signal is not received, the remaining capacity of the secondary battery provided in the electronic timepiece 100 is indicated. Note that the user of the electronic timepiece 100 can use one of the operation buttons described below to display either the state in which the hands 152 indicate the mode executed by the electronic timepiece 100 or the state in which the hands 152 indicate the remaining capacity of the secondary battery. It is possible to switch from the state to the other state. The secondary battery included in the electronic timepiece 100 will be described later.

A date display unit 19 for displaying the date is arranged below the dial plate 11 so that the date display unit 19 can be seen through an opening 11 a formed in the dial plate 11.
Hereinafter, the dial plate 11, the pointer shaft 12, the pointer 13, the small clock 14, the indicator 15, and the date display unit 19 may be collectively referred to as a time display unit.
Moreover, although mentioned later for details, the exterior case 80 has two opening of the surface side and a back surface side. The opening on the surface side of the exterior case 80 is closed with a cover glass 84 via a glass edge 82, and the dial 11, the hands 13 (13 a to 13 c), and the small clock 14 via the cover glass 84. The indicator 15 and the date display unit 19 are visible.

  Moreover, the electronic timepiece 100 includes a crown 16 and operation buttons 17 and 18 as shown in FIG. By manually operating the crown 16 and the operation buttons 17 and 18, the electronic timepiece 100 receives a satellite signal from at least one GPS satellite 20 and corrects the internal time information (time information acquisition mode). The mode can be set to one of a mode (position information acquisition mode) in which satellite signals from a plurality of GPS satellites 20 are received and positioning calculation is performed to correct the time difference of the internal time information. The electronic timepiece 100 can also execute the time information acquisition mode and the position information acquisition mode periodically (automatically).

FIG. 3 is a partial cross-sectional view showing the internal structure of the electronic timepiece 100, and FIG. 4 is an exploded perspective view of a part of the electronic timepiece 100.
As shown in FIG. 3, the outer case 80 has a cylindrical case body 81 made of metal or other conductive material, and a cylindrical glass edge 82 made of ceramic or other non-conductive material. It is configured to be fitted. The outer case 80 has an opening K1 on the front surface side and an opening K2 on the back surface side. The opening K1 on the surface side of the outer case 80 is closed with a disk-shaped cover glass 84. The opening K2 on the back surface side of the outer case 80 is closed by a back cover 85 formed of a metal such as SU (stainless steel) or Ti (titanium). The back cover 85 and the case body 81 are fixed by, for example, screw grooves.

A ring-shaped dial ring 83 made of a non-conductive material such as plastic is provided on the lower side (back side) of the cover glass 84 along the inner periphery of the glass edge 82. In addition, below the dial ring 83, a ground plate 38 made of a nonconductive material such as plastic is provided on the inner side of the inner periphery of the case body 81.
A donut-shaped storage space is defined by the base plate 38 and dial ring 83 and the inner periphery of the outer case 80. In this storage space, an annular antenna body 40 is stored. That is, the antenna body 40 is accommodated on the inner side of the inner periphery of the outer case 80, and the upper part thereof is covered with the dial ring 83. Further, in this storage space, an annular ground plate 90 formed of a conductive material such as metal is stored between the antenna body 40 and the ground plane 38. The ground plate 90 is electrically connected to the case body 81 via a plurality (for example, four) of conductive springs 90a formed of a conductive material (see FIGS. 4 and 6).

The details of the antenna body 40 will be described with reference to FIG. FIG. 5A is a perspective view of the antenna body 40, and FIG. 5B is a plan view of the antenna body 40. FIG. 5C is a partial cross-sectional view of the antenna body 40 taken along the line Gg shown in FIG.
The antenna body 40 includes an annular dielectric 401 as a base material, an antenna pattern 402 and an antenna pattern 403 formed from a conductive material such as metal, and a power feeding unit 404 formed from a conductive material such as metal. Is formed by plating or silver paste printing.

The dielectric 401 is formed so that the dielectric constant εr is about 5 to 20 by mixing a dielectric material that can be used at high frequencies such as titanium oxide with a resin.
As shown in FIG. 5C, the dielectric 401 may be referred to as an upper surface T1, an outer peripheral surface T2, a bottom surface T3, an upper inclined surface TP1, and a lower inclined surface TP2 (hereinafter simply referred to as an “inclined surface”). ) Surrounded by a pentagon. As shown in this figure, an antenna pattern 402 is formed on the upper surface T1 of the dielectric 401, and an antenna pattern 403 is formed on the upper inclined surface TP1. In addition, a power feeding portion 404 is formed on the upper inclined surface TP1, the lower inclined surface TP2, and the bottom surface T3 of the dielectric 401. The antenna pattern 403 is electrically connected to the power supply pin 44 via the power supply unit 404, and a predetermined potential is supplied via the power supply pin 44. On the other hand, no potential is supplied to the antenna pattern 402 from the outside of the antenna body 40.

As shown in FIG. 5B, the antenna pattern 402 has a notch 405 and is formed in a shape in which a part of the annular shape is notched. The antenna pattern 402 has an antenna length that resonates with a radio wave (satellite signal) from a position information satellite.
The frequency of the radio wave from the GPS satellite 20 is about 1.575 GHz, and one wavelength is about 19 cm. In order to receive circularly polarized waves, an antenna length that is approximately 1.0 to 1.35 times the wavelength (that is, the circumferential length of the antenna pattern 402) is required, and therefore radio waves from the GPS satellite 20 are received. For this purpose, a loop antenna of about 19 to 26 cm is required. When a loop antenna having such an antenna length is accommodated in the wristwatch, the wristwatch becomes large.
On the other hand, in this embodiment, the antenna body 40 is formed using the dielectric 401 having a relative dielectric constant εr of about 5 to 20 as a base material. When the dielectric 401 having the relative dielectric constant εr is used, the wavelength shortening rate by the dielectric 401 is (εr) ^−1/2 . That is, by providing the dielectric 401 having a relative dielectric constant of εr, the wavelength of the radio wave received by the antenna body is shortened to (εr) ^−½ times compared to the case without such a dielectric 401. be able to. That is, since the antenna body 40 according to the present embodiment includes the dielectric 401 having the relative dielectric constant εr, the antenna length of the antenna body 40 is (εr) ⁻¹ compared to the case where such a dielectric 401 is not provided. ^The antenna can be reduced in size.
As specific dimensions of the antenna pattern 402, an angle formed by the power feeding unit 404 and the notch 405 is Φa, a length of the notch 405 is Δk, a circumferential length of the antenna pattern 402 is L, and reception is performed. When the wavelength of the circularly polarized wave (that is, the wavelength after wavelength shortening) is λ, for example, L = 1.31λ, Φa = 40 °, and Δk = 0.018λ.

In addition, as shown in FIG. 5B, the antenna pattern 403 is a part of an annular shape in plan view (that is, when the electronic timepiece 100 is viewed from a direction perpendicular to the dial plate 11 or the cover glass 84). Is formed so as to maintain a certain distance (for example, an interval of about 0.01λ) from the antenna pattern 402. These two antenna patterns 402 and 403 function as antenna elements that are electromagnetically coupled to each other and convert electromagnetic waves into current.
Note that, by appropriately setting the length of the antenna pattern 403, it is possible to match the impedance with a circuit electrically connected to the antenna body 40.

The description returns to FIGS. 3 and 4.
As shown in FIG. 3, inside the inner periphery of the antenna body 40, the light transmitting dial plate 11, the pointer shaft 12 penetrating the dial plate 11 and the ground plate 38, and the pointer shaft 12 are turned around. A plurality of hands 13 (second hand 13a, minute hand 13b, and hour hand 13c) indicating the current time are provided. More specifically, as shown in FIG. 3, the pointer shaft 12 includes a shaft 12a, a shaft 12b, and a shaft 12c, the second hand 13a rotates around the shaft 12a, and the minute hand 13b moves around the shaft 12b. The hour hand 13c turns around the shaft 12c.
Although not shown in FIG. 3, on the inner side of the inner periphery of the antenna body 40, a shaft 141 that penetrates the dial plate 11 and the ground plate 38, and a pointer 142 and a pointer 143 that circulate around the shaft 141, In addition, a shaft 151 that passes through the dial 11 and the base plate 38 and a pointer 152 that goes around the shaft 151 are provided.
The pointer shaft 12 extends in the front-back direction along the central axis of the outer case 80 (or the central axis of the antenna body 40). Further, the shaft 141 and the shaft 151 extend in the front and back direction of the exterior case 80 (see FIG. 4).
The dial plate 11 is a circular plate material and is formed of a light-transmitting non-conductive material such as plastic. As shown in FIG. 3, the dial plate 11 is disposed between the cover glass 84 and the main plate 38. The dial 11 has a hole through which the pointer shaft 12 passes, a hole through which the shaft 141 passes (see FIG. 4), and a hole through which the shaft 151 passes (see FIG. 4). An opening 11a (see FIG. 2 and FIG. 4) for visually recognizing the image is formed.
The pointer 13, the pointers 142 and 143, and the pointer 152 are disposed inside the inner periphery of the antenna body 40 and between the cover glass 84 and the dial 11.

A drive mechanism (drive unit) 30 for driving the time display unit (the hands 13, hands 142 and 143, and the date display unit 19) is attached to the lower side (back side) of the base plate 38.
The drive mechanism 30 includes a plurality of step motors M1 to M5 and a plurality of wheel trains corresponding to each of the plurality of step motors M1 to M5. Each train wheel is composed of one or more gears. Hereinafter, the step motors M1 to M5 may be collectively referred to as the step motor M.
The drive mechanism 30 drives the plurality of hands 13 by rotating the pointer shaft 12. Specifically, the step motor M1 of the drive mechanism 30 rotates the shaft 12a through the train wheel so that the second hand 13a makes one round around the pointer shaft 12 in 60 seconds. Further, the step motor M2 of the drive mechanism 30 rotates the shaft 12b through the train wheel so that the hour hand 13c makes one turn around the pointer shaft 12 in 12 hours, and the minute hand 13b moves around the pointer shaft 12. The shaft 12c is rotated so as to make one round in 60 minutes. The step motor M3 of the drive mechanism 30 drives the hands 142 and 143 by rotating the shaft 141 via the train wheel. The step motor M4 of the drive mechanism 30 drives the pointer 152 by rotating the shaft 151 via the train wheel. The step motor M5 of the drive mechanism 30 drives the date display unit 19 so as to switch the display of the date display unit 19 via the train wheel. Thus, the drive mechanism 30 drives the time display unit.

The electronic timepiece 100 also includes a substrate 25 inside the exterior case 80. The substrate 25 is formed of a material including a resin or a dielectric, and is disposed below the drive mechanism 30 (that is, between the drive mechanism 30 and the back cover 85).
A circuit block including a GPS receiver (wireless receiver) 26 and a controller 70 is mounted on the lower surface (back surface) of the substrate 25. The GPS receiving unit 26 is configured by, for example, a one-chip IC module, and includes an analog circuit and a digital circuit. The controller 70 sends a control signal to the GPS receiver 26 to control the reception operation of the GPS receiver 26 and to control the operation of the drive mechanism 30.

On the upper side of the substrate 25, power supply pins 44 made of metal or other conductive material are provided. The power feed pin 44 incorporates a spring and is provided so as to contact the substrate 25 and the power feed portion 404 of the antenna body 40 through an insertion hole opened in the ground plate 38 and the ground plate 90. The power feeding portion 404 of the antenna body 40 is electrically connected to the substrate 25 (strictly, wiring provided on the substrate 25) via the power feeding pins 44, and a constant potential generating circuit (provided on the substrate 25). A predetermined potential is supplied from (not shown).
In the present embodiment, the substrate 25 and the power supply unit 404 are electrically connected by the power supply pin 44, but the power supply pin 44 is merely an example of a power supply member that electrically connects the substrate 25 and the power supply unit 404. Instead of the power supply pin 44, the substrate 25 and the power supply unit 404 may be electrically connected by a member made of a conductive material, for example, a lead wire, a leaf spring, or the like.

  The circuit block including the GPS receiving unit 26 and the control unit 70 is covered with a shield 91 formed of a conductive material. The shield 91 is electrically connected to the ground plate 90 via the circuit retainer 39, the back cover 85, and the case body 81. The shield 91 is supplied with the ground potential of the circuit block. That is, the shield 91, the back cover 85, the case body 81, and the ground plate 90 are maintained at the ground potential of the circuit block and function as a ground plane.

  Between the drive mechanism 30 and the ground plane 38, a magnetic-resistant plate S1 and a magnetic-resistant plate S2 are provided, and between the drive mechanism 30 and the substrate 25, a magnetic-resistant plate S3 is provided. Hereinafter, the antimagnetic plate S1 and the antimagnetic plate S2 may be collectively referred to as a first antimagnetic plate, and the antimagnetic plate S3 may be referred to as a second antimagnetic plate. These anti-magnetic plates S1 to S3 are made of a conductive material having a high magnetic permeability such as pure iron.

When an object that generates a strong magnetic field such as a speaker exists outside the electronic timepiece 100, the step motor M may malfunction due to the influence of the magnetic field. Further, among various components constituting the electronic timepiece 100, metals such as the case body 81 and the back cover 85 generate a magnetic field when magnetized. Furthermore, the circuit block provided on the substrate 25 may generate a magnetic field.
In this embodiment, the drive motor 30 is magnetically shielded by covering the step motor M with magnetic-resistant plates S1 to S3 formed of a material having high magnetic permeability, and the step motor is caused by the various magnetic fields described above. M is prevented from malfunctioning.

The electronic timepiece 100 also includes a cylindrical secondary battery 27 such as a lithium ion battery, a battery storage unit 28 for storing the secondary battery 27, and a solar panel 87 that performs photovoltaic power generation inside the exterior case 80. Is provided.
The solar panel 87 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 87 is disposed between the main plate 38 and the dial 11 inside the inner periphery of the antenna body 40. A hole through which the pointer shaft 12 passes, a hole through which the shaft 141 passes (see FIG. 4), and a hole through which the shaft 151 passes (see FIG. 4) are formed at the center of the solar panel 87. An opening 87a (see FIGS. 2 and 4) for visually recognizing the display unit 19 is formed.
The secondary battery 27 is charged with electric power generated by the solar panel 87. The battery storage unit 28 for storing the secondary battery 27 is disposed below the substrate 25 (that is, between the substrate 25 and the back cover 85).

On the outside of the outer case 80, a crown 16, an operation button 17, and an operation button 18 are provided (see FIG. 2). The movement of the crown 16 caused by the user of the electronic timepiece 100 operating the crown 16 is transmitted to the drive mechanism 30 via the winding stem 16 a penetrating the exterior case 80. Further, the movement of the operation button 17 (or operation button 18) generated when the user of the electronic timepiece 100 presses the operation button 17 (or operation button 18) causes the button shaft 17 a (or button to penetrate the outer case 80). It is transmitted to a switch (not shown) via the shaft 18a) (see FIG. 7). The switch converts the pressure from the operation button 17 (or the operation button 18) into an electrical signal and transmits the electrical signal to the control unit 70.
Hereinafter, the crown 16, the winding stem 16a, the operation buttons 17 and 18, and the button shafts 17a and 18a may be collectively referred to as an operation unit.

The positional relationship among the antenna body 40, the dial plate 11, and the solar panel 87 will be described in detail with reference to FIG. 6. FIG. 6 is a partial cross-sectional view of the electronic timepiece 100.
In the present embodiment, as shown in FIG. 6, the dial plate 11 and the solar panel 87 are provided on the surface side of the bottom surface T <b> 3 of the antenna body 40. That is, when the distance between the antenna body 40 and the back cover 85 is Δy1, the distance between the solar panel 87 and the back cover 85 is Δy2, and the distance between the dial 11 and the back cover 85 is Δy3, Δy1 <Δy2 < The antenna body 40 is disposed at a position where the relationship Δy3 is established.

When the antenna body 40 is disposed such that the bottom surface T3 of the antenna body 40 is located on the back side of the dial plate 11 and the solar panel 87 as in the present embodiment, the antenna body 40 is connected to the dial plate 11 and the solar panel. Compared to the case where the antenna body 40 is disposed on the front surface side of the panel 87, the length ΔY of the antenna body 40 in the front and back direction can be increased.
The reception performance of the antenna body 40 becomes better as the cross-sectional area of the antenna body 40 is larger. Therefore, the antenna body 40 according to the present embodiment can increase the length ΔY in the front and back direction of the antenna body 40 and increase the cross-sectional area of the antenna body 40. As compared with the case where the panel 87 is disposed on the surface side of the panel 87, it is possible to ensure good reception performance.

  In the present embodiment, both the dial plate 11 and the solar panel 87 are provided on the surface side of the bottom surface T3 of the antenna body 40. However, the present invention is not limited to such an embodiment, and the dial plate 11 Only may be provided on the surface side of the bottom surface T3 of the antenna body 40. Specifically, the antenna body 40 may be arranged so that the relationship Δy2 <Δy1 <Δy3 is established. Even in this case, the length ΔY in the front and back direction of the antenna body 40 is set to such a length that the antenna body 40 can secure the cross-sectional area of the antenna body 40 necessary for obtaining good reception performance. Thus, the reception performance of the antenna body 40 can be kept good.

  As described above, the antenna body 40 (dielectric 401) according to the present embodiment includes the lower inclined surface TP2. As shown in FIG. 6, the lower inclined surface TP <b> 2 is provided on the inner periphery of the antenna body 40, and is inclined away from the back cover 85 toward the center of the antenna body 40 (that is, as it approaches the pointer shaft 12). Surface. And the dial 11 is provided so that a part may overlap with a part of lower side inclined surface TP2 when planarly viewed. More specifically, when the area where the lower inclined surface TP2 exists when viewed in plan is the area A1, and when the area where the dial 11 is provided when viewed in plan is the area A2, the dial 11 A part of A1 and a part of region A2 are provided so as to overlap each other. Therefore, in this embodiment, the area of the dial 11 when viewed in plan can be increased compared to the case where the dial 11 is provided so that the area A1 does not overlap the area A2, and the design of the electronic timepiece 100 can be increased. The degree of freedom can be improved, and the visibility such as the time displayed on the time display unit can be improved.

Further, the antenna body 40 (dielectric body 401) according to the present embodiment is provided with an upper inclined surface TP1 as shown in FIG. Therefore, the upper inclined surface TP3 can also be provided on the dial ring 83 disposed on the front surface side of the antenna body 40.
If the upper inclined surface TP3 is not provided, for example, when the user looks at the dial plate 11 from the upper right direction in FIG. 6, the end portion of the dial plate 11 is blocked by the dial ring 83 and visually recognized. I can't. On the other hand, since the dial ring 83 according to the present embodiment has the upper inclined surface TP3, the user can see the characters and scales provided on the dial plate 11 and the dial ring 83 from the wider angle direction. It is possible to visually recognize as much as possible.

  7 shows the exterior case 80, the antenna body 40, the power feed pin 44, the secondary battery 27, and the battery housing 28 when viewed in plan (that is, when the electronic timepiece 100 is viewed from a direction perpendicular to the dial 11). FIG. 6 is an explanatory diagram for explaining the positional relationship between the operation units (the crown 16, the winding stem 16a, the operation buttons 17 and 18, and the button shafts 17a and 18a).

As shown in FIG. 7, the battery storage unit 28 is positioned so that the secondary battery 27 (that is, the secondary battery 27 stored in the battery storage unit 28) and the antenna body 40 do not overlap when viewed in plan. Placed in.
In addition, the power supply pin 44 is disposed at a position that does not overlap the secondary battery 27 stored in the battery storage unit 28 when viewed in plan.

The secondary battery 27 absorbs or reflects electromagnetic waves including radio waves (satellite signals) from the GPS satellite 20. Therefore, when the secondary battery 27 is located in the vicinity of the antenna body 40, the secondary battery 27 absorbs or reflects radio waves that the antenna body 40 could receive if the secondary battery 27 is not present. For this reason, the antenna body 40 cannot maintain good reception performance.
In particular, the gain of the antenna body 40 is maximized in the direction in which the power feeding unit 404 is provided when viewed from the center of the antenna body 40 (that is, the direction in which the power feeding unit 404 is provided as viewed from the center of the antenna body 40). Corresponds to the maximum radiation direction of the antenna body 40). Therefore, when the power feeding pin 44 connected to the power feeding unit 404 is located in the vicinity of the secondary battery 27, the reception performance of the antenna body 40 is greatly deteriorated.
The magnitude of the influence of the secondary battery 27 on the reception performance of the antenna body 40 is such that the distance between the secondary battery 27 and the antenna body 40 is short, or the secondary battery 27 and the feed pin 44. Increases when the distance to is short.

On the other hand, in the present embodiment, the antenna body 40 is arranged at a position where it does not overlap the secondary battery 27 in plan view, and the power supply pin 44 does not overlap with the secondary battery 27 in plan view. It is arranged in the position.
That is, in the present embodiment, the distance between the antenna body 40 and the secondary battery 27 can be increased as compared with the case where the antenna body 40 and the secondary battery 27 overlap in plan view. Further, in the present embodiment, the distance between the power supply pin 44 and the secondary battery 27 can be increased as compared with the case where the power supply pin 44 and the secondary battery 27 overlap in plan view.
Therefore, in this embodiment, the influence which the secondary battery 27 has on the reception performance of the antenna body 40 can be suppressed to a small level, and the reception performance of the antenna body 40 can be kept good.

  Here, on the plane shown in FIG. 7, a line segment connecting the power supply pin 44 and the pointer shaft 12 is referred to as a line segment Lpx, and the center B of the secondary battery 27 stored in the battery storage unit 28 and the pointer shaft 12 are connected. The connecting line segment is referred to as a line segment Lbx. At this time, the feed pin 44 is a position that overlaps the antenna body 40 in plan view, and a position where the angle θ formed by the line segment Lbx and the line segment Lpx is not less than 90 degrees and not more than 180 degrees. Placed in.

  When the power feed pin 44 is disposed at a position where the angle θ is 90 degrees or more and 180 degrees or less, the power feed pin 44 is disposed as compared with the case where the power feed pin 44 is disposed at a position where the angle θ is smaller than a predetermined angle. The distance between 44 and the secondary battery 27 can be increased. For this reason, the influence of the secondary battery 27 on the reception performance of the antenna body 40 can be suppressed to a small level, and a decrease in the reception performance of the antenna body 40 can be suppressed.

  For structural reasons, the battery storage unit 28 cannot be disposed at a position overlapping the operation unit (more specifically, the winding stem 16a of the operation unit) in plan view. Further, the power supply pin 44 cannot be disposed at a position overlapping the operation unit (more specifically, the winding stem 16a, the button shaft 17a, and the button shaft 18a in the operation unit) in a plan view. Therefore, the battery storage unit 28 and the power supply pin 44 are arranged so as not to overlap the operation unit in plan view. For structural reasons, the battery storage unit 28 is arranged so as not to overlap with a circuit block (not shown in FIG. 7) including the GPS reception unit 26 and the control unit 70 in plan view.

  In the present embodiment, as shown in FIG. 7, the crown 16 and the winding stem 16 a are provided in the 3 o'clock direction around the pointer shaft 12. In the present embodiment, the operation button 17 and the button shaft 17a are provided in the 2 o'clock direction with the pointer shaft 12 as the center, and the operation button 18 and the button shaft 18a are in the 4 o'clock direction with the pointer shaft 12 as the center. Is provided. That is, the operation unit according to the present embodiment is provided so as to be included in the range from 1 o'clock to 5 o'clock in plan view.

In the present embodiment, the battery storage unit 28 and the power supply pin 44 are arranged in the range from 6 o'clock to 12 o'clock. Strictly speaking, the feeding pin 44 is disposed at a position intersecting with a straight line L12 passing through the pointer shaft 12 and extending in the direction of 12 o'clock in plan view, or at a position on the 9 o'clock side with respect to the straight line L12. Further, the battery storage unit 28 is arranged so that the center B of the secondary battery 27 is located at a position where it intersects the straight line L12 or at a 9 o'clock side with respect to the straight line L12 in plan view.
Thereby, the battery accommodating part 28 and the electric power feeding pin 44 can be arrange | positioned in the position which does not overlap with an operation part by planar view.

  Further, as described above, in the present embodiment, the power supply pin 44 is disposed at a position where the angle θ formed by the line segment Lbx and the line segment Lpx is not less than 90 degrees and not more than 180 degrees. Therefore, for example, when the battery housing portion 28 is provided so that the center B of the secondary battery 27 is positioned in the 12 o'clock direction, the power feed pin 44 is in the range from 6 o'clock to 9 o'clock (the 6 o'clock direction and 9 o'clock Are included). Conversely, when the battery housing portion 28 is provided so that the center B of the secondary battery 27 is positioned in the 6 o'clock direction, the power supply pin 44 is in the range from 9 o'clock to 12 o'clock (the direction of 9 o'clock and 12 o'clock). Including direction).

In the present embodiment, as shown in FIG. 7, the battery housing portion 28 is provided so that the center B of the secondary battery 27 is positioned in the 12 o'clock direction, and the power supply pin 44 is in the 9 o'clock direction. Is provided.
The electronic timepiece 100 can receive satellite signals outdoors. Also, the electronic timepiece 100 is often worn on the user's arm outdoors, and the user of the electronic timepiece 100 points the arm downward (that is, opposite to the zenith direction) outdoors. Often has a posture. Therefore, outdoors, it is highly possible that the 9 o'clock direction is the zenith direction when viewed from the center of the electronic timepiece 100 (the pointer shaft 12).
In the present embodiment, the power supply pin 44 is provided in the 9 o'clock direction. As described above, the gain of the antenna body 40 is maximized in the direction in which the power supply unit 404 is provided, that is, in the direction in which the power supply pin 44 is connected, as viewed from the center of the antenna body 40. Therefore, in this embodiment, the possibility that the maximum radiation direction of the antenna body 40 is directed to the zenith direction can be increased outdoors where the electronic timepiece 100 receives satellite signals, and the reception performance of the antenna body 40 is kept good. It becomes possible.

Next, the positional relationship between the antenna body 40 and the power feed pin 44 and the antimagnetic plates S1 to S3 will be described with reference to FIGS.
FIG. 8 is an explanatory diagram showing the positional relationship between the antenna body 40, the magnetic plate S1 to S3, and the step motors M1 to M5 when viewed in a plan view. FIG. 9 is an explanatory diagram in which the antimagnetic plate S3 is removed from FIG. 8 in order to express the positional relationship among the antenna body 40, the antimagnetic plate S1, the antimagnetic plate S2, and the step motors M1 to M5, and FIG. FIG. 9 is an explanatory diagram in which the magnetic resistant plates S1 and S2 are removed from FIG. 8 in order to represent the positional relationship among the body 40, the magnetic resistant plate S3, and the step motors M1 to M5.

As shown in FIGS. 8 and 9, the antimagnetic plate S <b> 1 and the antimagnetic plate S <b> 2 are provided so as to overlap at least a part of each step motor M in plan view. That is, the magnetic-resistant plate S1 and the magnetic-resistant plate S2 are provided so as to overlap at least a part of the drive mechanism 30 in plan view.
As shown in FIGS. 8 and 10, the antimagnetic plate S <b> 3 is provided so as to overlap with at least a part of each step motor M in plan view. That is, the magnetic-resistant plate S3 is provided so as to overlap at least a part of the drive mechanism 30 in plan view.
Thereby, each step motor M is shielded magnetically from the magnetic field emitted from the outside of the drive mechanism 30, and it becomes possible to prevent malfunction of the step motor M caused by the magnetic field.

  The magnetic plates S1 to S3 absorb electromagnetic waves including radio waves (satellite signals) from the GPS satellite 20. Therefore, when the electronic timepiece 100 is provided with the magnetic resistant plates S1 to S3, compared to the case where the magnetic resistant plates S1 to S3 are not provided, the strength of the radio wave received by the antenna body 40 among the radio waves from the GPS satellite 20 is reduced. The reception performance of the body 40 may deteriorate.

Next, with reference to FIG. 11, the effect of the provision of the magnetic resistant plate on the reception performance of the antenna body 40 will be described.
In FIGS. 11A and 11B, a curve Ca represented by a solid line represents the directivity characteristics of the antenna body 40 provided in the electronic timepiece 100 including the magnetic resistant plates S1 to S3. In FIG. 11A, a curve Cb represented by a broken line indicates the direction of the antenna body 40 provided in the electronic timepiece having only the magnetic resistant plate S2 and the magnetic resistant plate S3, with the magnetic resistant plate S1 removed from the electronic timepiece 100. It represents a characteristic. Further, in FIG. 11B, a curve Cc represented by a broken line indicates the direction of the antenna body 40 provided in the electronic timepiece in which the magnetic resistant plates S1 to S3 are all removed from the electronic timepiece 100 and the magnetic resistant plates S1 to S3 are not provided. It represents a characteristic. In these figures, the value indicating the gain of the antenna body 40 is normalized so that the maximum value (gain in the zenith direction) of the antenna body 40 represented by the curve Cc is 0.0 dB.

As shown by the curve Ca, the maximum value (gain in the zenith direction) of the antenna body 40 in the case where the electronic timepiece 100 includes the antimagnetic plates S1 to S3 is −0.6 dBic, and the average value of the gain (all The average gain in the direction is -3.5 dBic. Further, as shown by the curve Cb, the maximum gain of the antenna body 40 when the antimagnetic plate S1 is removed from the electronic timepiece 100 is -0.1 dBic, and the average value is -3.0 dBic. Further, as shown by the curve Cc, when the magnetic resistant plates S1 to S3 are removed from the electronic timepiece 100, the maximum value of the gain of the antenna body 40 is −0.0 dBic, and the average value is −3.1 dBic. .
That is, by removing the magnetic-resistant plate S1 from the electronic timepiece 100, the gain of the antenna body 40 is improved by 0.5 dBic in the zenith direction, and the average in all directions is improved by 0.5 dBic. On the other hand, even if all the magnetic-resistant plates S1 to S3 are removed from the electronic timepiece 100, the gain of the antenna body 40 is improved by 0.6 dBic in the zenith direction and is only improved by 0.4 dBic in the average in all directions. The reception performance is almost the same as when the anti-magnetic plate S1 is removed.

Thus, the magnitude | size of influence with respect to the reception performance of the antenna body 40 is the largest in the magnetic-resistant board S1 compared with the magnetic-resistant board S2 and the magnetic-resistant board S3. This is because, as is apparent from FIG. 3, the antimagnetic plate S <b> 1 is disposed closer to the antenna body 40 than the antimagnetic plate S <b> 2 and the antimagnetic plate S <b> 3.
That is, when the anti-magnetic plate is disposed in the vicinity, the reception performance of the antenna body 40 deteriorates. However, as long as the anti-magnetic plate is arranged at a certain distance, the reception performance can be kept good. it can.

In the present embodiment, as shown in FIGS. 8 to 10, the antenna body 40 is disposed at a position that does not overlap with the antimagnetic plates S <b> 1 to S <b> 3 in plan view. In this case, the distance between the antenna body 40 and the magnetic resistant plates S1 to S3 can be increased as compared with the case where the antenna body 40 is provided at a position overlapping the magnetic resistant plates S1 to S3 in plan view.
Therefore, in this embodiment, it is possible to suppress the influence of the magnetic-resistant plates S1 to S3 (particularly, the magnetic-resistant plate S1) on the reception performance of the antenna body 40, and to keep the reception performance of the antenna body 40 favorable. .

As described above, the gain of the antenna body 40 is maximized in the direction in which the power feeding unit 404 is provided when viewed from the center of the antenna body 40. Therefore, when the power feeding pin 44 connected to the power feeding unit 404 is located in the vicinity of the magnetic shield plates S1 to S3, the reception performance of the antenna body 40 is greatly deteriorated.
On the other hand, in this embodiment, the power feeding pin 44 is arranged in the 9 o'clock direction when viewed from the pointer shaft 12. As shown in FIG. 8, the magnetically resistant plates S <b> 1 to S <b> 3 as a whole are arranged at positions deviated in the 3 o'clock direction from the center of the electronic timepiece 100 when viewed from the center. Therefore, by arranging the power feeding pin 44 in the 9 o'clock direction, compared to the case where the power feeding pin 44 is arranged in a direction other than 9 o'clock (for example, 3 o'clock direction), the power feeding pin 44 and the magnetic plates S1 to S3. The distance between can be increased. Thereby, it is possible to keep the reception performance of the antenna body 40 good by suppressing the influence of the magnetic resistant plates S1 to S3 on the reception performance of the antenna body 40 to a small extent.

<B: Circuit configuration of electronic timepiece with built-in antenna>
FIG. 12 is a block diagram showing a circuit configuration of the electronic timepiece 100. As shown in FIG. 12, the electronic timepiece 100 includes a GPS receiving unit 26 and a control display unit 36. The GPS receiver 26 performs processing such as satellite signal reception, GPS satellite 20 acquisition, position information generation, and time correction information generation. The control display unit 36 performs processing such as holding internal time information and correcting internal time information.

  The solar panel 87 charges the secondary battery 27 through the charge control circuit 29. The electronic timepiece 100 includes regulators 34 and 35, and the secondary battery 27 supplies drive power to the control display unit 36 via the regulator 34 and to the GPS reception unit 26 via the regulator 35. The electronic timepiece 100 also includes a voltage detection circuit 37 that detects the voltage of the secondary battery 27. In place of the regulator 35, for example, a regulator that supplies driving power to the RF unit 50 (details will be described later), and a regulator (both not shown) that supplies driving power to the baseband unit 60 (details will be described later). It may be provided separately.

  The electronic timepiece 100 includes an antenna body 40 and a SAW (Surface Acoustic Wave) filter 32. As described in FIG. 1, the antenna body 40 receives satellite signals from the plurality of GPS satellites 20. However, since the antenna body 40 also receives some unnecessary radio waves other than the satellite signal, the SAW filter 32 performs a process of extracting the satellite signal from the signal received by the antenna body 40. That is, the SAW filter 32 is configured as a band-pass filter that passes a 1.5 GHz band signal.

  The GPS receiving unit 26 includes an RF (Radio Frequency) unit 50 and a baseband unit 60. As will be described below, the GPS receiver 26 performs a process of acquiring 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 32.

  The RF unit 50 includes an LNA (Low Noise Amplifier) 51, a mixer 52, a VCO (Voltage Controlled Oscillator) 53, a PLL (Phase Locked Loop) circuit 54, an IF amplifier 55, an IF (Intermediate Frequency) filter 56, an ADC (ADC). A / D converter) 57 and the like.

  The satellite signal extracted by the SAW filter 32 is amplified by the LNA 51. The satellite signal amplified by the LNA 51 is mixed with the clock signal output from the VCO 53 by the mixer 52 and down-converted to an intermediate frequency band signal. The PLL circuit 54 compares the phase of the clock signal obtained by dividing the output clock signal of the VCO 53 with the reference clock signal, and synchronizes the output clock signal of the VCO 53 with the reference clock signal. As a result, the VCO 53 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 52 is amplified by the IF amplifier 55. Here, by the mixing in the mixer 52, a high-frequency signal of several GHz is generated together with the signal in the intermediate frequency band. Therefore, the IF amplifier 55 amplifies a high frequency signal of several GHz along with the signal in the intermediate frequency band. The IF filter 56 passes the signal in the intermediate frequency band and removes the high frequency signal of several GHz (precisely, attenuates below a predetermined level). The intermediate frequency band signal that has passed through the IF filter 56 is converted into a digital signal by an ADC (A / D converter) 57.

  The baseband unit 60 includes a DSP (Digital Signal Processor) 61, a CPU (Central Processing Unit) 62, an SRAM (Static Random Access Memory) 63, and an RTC (Real Time Clock) 64. The baseband unit 60 is connected to a crystal oscillation circuit with temperature compensation circuit (TCXO: Temperature Compensated Crystal Oscillator) 65, a flash memory 66, and the like.

  A crystal oscillation circuit (TCXO) 65 with a temperature compensation circuit generates a reference clock signal having a substantially constant frequency regardless of the temperature. The flash memory 66 stores, for example, time difference information. The time difference information is information in which time difference data (such as a correction amount for UTC associated with coordinate values (for example, latitude and longitude)) is defined.

  When set to the time information acquisition mode or the position information acquisition mode, the baseband unit 60 performs a process of demodulating the baseband signal from the digital signal (intermediate frequency band signal) converted by the ADC 57 of the RF unit 50.

  In addition, when the time information acquisition mode or the position information acquisition mode is set, the baseband unit 60 generates a local code having the same pattern as each C / A code in the satellite search process described later, and generates a baseband signal. A process of correlating each C / A code included and the local code is performed. Then, the baseband unit 60 adjusts the local code generation timing so that the correlation value for each local code has a peak, and if the correlation value is equal to or greater than the threshold, it synchronizes with the GPS satellite 20 of that local code (that is, The GPS satellite 20 is captured). Here, the GPS system employs a CDMA (Code Division Multiple Access) method in which all GPS satellites 20 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, it is possible to search for a GPS satellite 20 that can be captured.

  Further, the baseband unit 60 uses a local code having the same pattern as the C / A code of the GPS satellite 20 in order to acquire the satellite information of the captured GPS satellite 20 in the time information acquisition mode or the position information acquisition mode. Performs processing to mix baseband signals. In the mixed signal, a navigation message including satellite information of the captured GPS satellite 20 is demodulated. Then, the baseband unit 60 detects TLM words (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 (for example, stored in the SRAM 63). ) Process. Here, the GPS time information is the week number data (WN) and the Z count data, but may be only the Z count data when the week number data has been acquired previously. And the baseband part 60 produces | generates the time correction information required in order to correct internal time information based on satellite information.

  In the time information acquisition mode, more specifically, the baseband unit 60 performs time measurement calculation based on the GPS time information, and generates time correction information. The time correction information in the time information acquisition mode may be, for example, GPS time information itself or information on a time difference between the GPS time information and the internal time information.

On the other hand, in the position information acquisition mode, more specifically, the baseband unit 60 performs positioning calculation based on GPS time information and orbit information, and the position information (more specifically, the electronic timepiece 100 is Get the latitude and longitude of the location. Further, the baseband unit 60 refers to the time difference information stored in the flash memory 66 and acquires time difference data associated with the coordinate values (for example, latitude and longitude) of the electronic timepiece 100 specified by the position information. . In this way, the baseband unit 60 generates satellite time data (GPS time information) and time difference data as time correction information. As described above, the time correction information in the position information acquisition mode may be the GPS time information and the time difference data itself. For example, instead of the GPS time information, the time correction information is a time difference data between the internal time information and the GPS time information. Also good.
The baseband unit 60 may generate time correction information from the satellite information of one GPS satellite 20, or may generate time correction information from the satellite information of a plurality of GPS satellites 20.

  The operation of the baseband unit 60 is synchronized with the reference clock signal output from the crystal oscillation circuit with temperature compensation circuit (TCXO) 65. The RTC 64 generates timing for processing satellite signals. The RTC 64 is counted up by the reference clock signal output from the TCXO 65.

The control display unit 36 includes a control unit 70, a drive circuit 74, and a crystal resonator 73.
The control unit 70 includes a storage unit 71 and an RTC (Real Time Clock) 72 and performs various controls. The control unit 70 can be configured by a CPU, for example. The controller 70 sends a control signal to the GPS receiver 26 and controls the reception operation of the GPS receiver 26. Further, the control unit 70 controls the operation of the regulator 34 and the regulator 35 based on the detection result of the voltage detection circuit 37. The control unit 70 controls the driving of all the hands 13 through the driving circuit 74 and controls the driving of the hands 142 and 143 and the date display unit 19 through the driving circuit 74.

  The storage unit 71 stores received data. The control unit 70 corrects the internal time information based on the received data. The internal time information is time information counted by the electronic timepiece 100, is counted by the RTC 72 that is constantly driven, and is updated by a reference clock signal generated by the crystal unit 73. Therefore, even if the power supply to the GPS receiver 26 is stopped, the internal time information can be updated and the hand movement of the pointer can be continued.

  When the time information acquisition mode is set, the control unit 70 controls the operation of the GPS receiving unit 26, corrects the internal time information based on the GPS time information, and stores the internal time information in the storage unit 71. More specifically, the internal time information is corrected to UTC (Coordinated Universal Time) obtained by adding a UTC offset to the acquired GPS time information. Further, when the position information acquisition mode is set, the control unit 70 controls the operation of the GPS receiving unit 26, corrects and stores the internal time information based on the satellite time data (GPS time information) and the time difference data. Store in the unit 71.

<C: Advantages of the embodiment>
As described above, according to the present embodiment, the antenna body 40 is disposed at a position that does not overlap with the magnetic plate S1 to S3 in plan view. That is, this embodiment lengthens the distance between the antenna body 40 and the magnetic resistant plates S1 to S3 as compared with the case where the antenna body 40 is provided at a position overlapping the magnetic resistant plates S1 to S3 in plan view. Can do. Therefore, in this embodiment, the influence which the magnetic-resistant plates S1-S3 have with respect to the antenna body 40 can be suppressed small, and the receiving performance of the antenna body 40 can be kept favorable.

  Further, according to the present embodiment, the secondary battery 27 is disposed at a position that does not overlap the antenna body 40 in plan view. That is, in the present embodiment, the distance between the antenna body 40 and the secondary battery 27 can be increased as compared with the case where the antenna body 40 and the secondary battery 27 overlap in plan view. Therefore, in this embodiment, since the influence which the secondary battery 27 has on the reception performance of the antenna body 40 can be suppressed small, the reception performance of the antenna body 40 can be kept good.

  Further, according to the present embodiment, the antenna body 40 is arranged so that the bottom surface T3 of the antenna body 40 is located on the back side of the dial plate 11 and the solar panel 87. That is, in the present embodiment, the length ΔY in the front and back direction of the antenna body 40 can be increased as compared with the case where the antenna body 40 is arranged so as to be located on the front side of the dial plate 11 and the solar panel 87. . As a result, the cross-sectional area of the antenna body 40 can be increased, and good reception performance of the antenna body 40 can be ensured.

  Further, according to the present embodiment, the dial 11 is provided so that a part thereof overlaps with a part of the lower inclined surface TP2 of the antenna body 40 (dielectric 401) when viewed in plan. That is, this embodiment can increase the area of the dial plate 11 in plan view as compared with the case where the dial plate 11 is provided so that the dial plate 11 and the lower inclined surface TP2 do not overlap in plan view. The visibility of the time displayed on the time display unit can be improved.

  According to the present embodiment, the back cover 85, the case body 81, and the ground plate 90 function as a ground plane. That is, in the present embodiment, in the electronic timepiece 100, the back cover 85 having a large volume and area and the case body 81 of the outer case 80 have a function of a ground plane, so that the ground potential is stabilized, and thus the antenna is excellent. It is possible to ensure reception performance.

In the present embodiment, the antenna body 40 (dielectric 401) includes an upper inclined surface TP1, and the dial ring 83 includes an upper inclined surface TP3. The upper inclined surface TP1 and the upper inclined surface TP3 become smaller with respect to the dial 11 as they go toward the center of the antenna body 40 (that is, as they go toward the pointer shaft 12). It becomes possible to visually recognize the time display part such as the plate 11 from a wide angle direction to every corner.
In the present embodiment, since the antenna body 40 includes the upper inclined surface TP1 and the lower inclined surface TP2, the antenna body 40 does not include the upper inclined surface TP1 and the lower inclined surface TP2. The cross-sectional area of the antenna body 40 becomes small. However, in the present embodiment, since the antenna body 40 extends to the back surface side from the solar panel 87, a reduction in the cross-sectional area of the antenna body 40 by providing the upper inclined surface TP1 and the lower inclined surface TP2. Can be compensated by increasing the length ΔY of the antenna body 40 in the front and back direction. That is, this embodiment can maintain both the good reception performance of the antenna body 40 and the good visibility of the time display unit such as the dial 11.

In the present embodiment, the power supply pin 44 is provided in the 9 o'clock direction when viewed from the pointer shaft 12.
As described above, since the electronic timepiece 100 is worn on the user's arm outdoors, the direction at 9 o'clock as viewed from the center of the electronic timepiece 100 (the pointer shaft 12) is likely to be the zenith direction. Therefore, by providing the feeding pin 44 in the direction of 9 o'clock when viewed from the pointer shaft 12, the possibility that the maximum radiation direction of the antenna body 40 coincides with the zenith direction outdoors is increased, and the reception performance of the antenna body 40 is increased. Can be kept good.
Further, the magnetic resistant plates S1 to S3 as a whole are provided at positions deviated in the 3 o'clock direction of the electronic timepiece 100 when viewed from the pointer shaft 12 in plan view. Therefore, the distance between the power supply pin 44 and the magnetic plate S1 to S3 can be increased by providing the power supply pin 44 in the 9 o'clock direction. That is, this embodiment can suppress the influence which the magnetic-resistant plates S1-S3 exert on the reception performance of the antenna body 40, and can keep the reception performance of the antenna body 40 favorable.

<Modification>
The present invention is not limited to the above-described embodiments, and various modifications as described below are possible, for example. Moreover, the aspect of the deformation | transformation described below can also combine suitably arbitrarily selected 1 or several.

<Modification 1>
In the embodiment described above, the magnetic-resistant plate S1 and the magnetic-resistant plate S2 overlap at least part of the step motors M1 to M5 in plan view, but may overlap all of the step motors M1 to M5. In the above-described embodiment, the antimagnetic plate S3 overlaps at least a part of the step motors M1 to M5 in plan view, but may overlap all of the step motors M1 to M5.
Further, the magnetic-resistant plate S1 and the magnetic-resistant plate S2 may overlap with the whole drive mechanism 30 in plan view, and the magnetic-resistant plate S3 may overlap with all of the drive mechanism 30 in plan view. Good. In this case, it is possible to more reliably prevent the malfunction of the step motor M caused by the magnetic field generated from the outside of the drive mechanism 30.

<Modification 2>
In the embodiment and the modification described above, the magnetically resistant plate S3 does not overlap the antenna body 40 when viewed in plan, but may overlap the antenna body 40 when viewed in plan.
FIG. 13 shows an electronic timepiece 100a according to the second modification. The electronic timepiece 100a is configured in the same manner as the electronic timepiece 100, except that the magnetic timepiece plate S3a is provided instead of the antimagnetic plate S3. The magnetic-resistant plate S3a shown in FIG. 13 is different from the magnetic-resistant plate S3 in that it has a wider width in the left-right direction in the figure than the magnetic-resistant plate S3 shown in FIG.
As described above, the magnetic resistant plate S1 has the largest influence on the reception performance of the antenna body 40 among the magnetic resistant plates S1 to S3. Therefore, even if the magnetic-resistant plate S3a overlapping the antenna body 40 in plan view is used instead of the magnetic-resistant plate S3 provided at a position away from the antenna body 40, the magnetic-resistant plate S3a is The influence exerted on the antenna body 40 is only small, and the antenna body 40 can maintain good reception performance even when the magnetic-resistant plate S3a and the antenna body 40 overlap in plan view.

<Modification 3>
In the embodiment and the modification described above, the electronic timepiece 100 (or the electronic timepiece 100a) includes the three antimagnetic plates S1, S2, and S3 (or S3a), but at least one of the three antimagnetic plates is antimagnetic. What is necessary is just to provide a board.
For example, the electronic timepiece 100 (or the electronic timepiece 100a) may include only the antimagnetic plate S3 (or antimagnetic plate S3a) among the three antimagnetic plates. The magnetic plate S3 (S3a) magnetically shields the step motors M1 to M5 from noise caused by a circuit block including the GPS receiver 26 and the controller 70. Therefore, from the viewpoint of preventing malfunction of the step motor M, the magnetic resistant plate S3 (S3a) plays a more important role than the magnetic resistant plates S1 and S2. Therefore, even if the electronic timepiece 100 (100a) does not include the magnetic resistant plate S1 and the magnetic resistant plate S2, the malfunction of the step motors M1 to M5 can be prevented as long as the electronic timepiece 100 (100a) includes the magnetic resistant plate S3 (S3a). Probability is high. Further, when the electronic timepiece 100 (100a) does not include the magnetic-resistant plate S1 and the magnetic-resistant plate S2, the antenna body 40 can ensure better reception performance as compared with the case where these are provided.

<Modification 4>
In the embodiment and the modification described above, the power feed pin 44 is arranged at a position where the angle θ formed by the line segment Lbx and the line segment Lpx is 90 degrees or more and 180 degrees or less. As long as it is provided at a position where the distance from the secondary battery 27 is a predetermined distance or more.
For example, even if the angle θ is 80 degrees, if the distance between the power supply pin 44 and the secondary battery 27 is more than a predetermined distance, the power supply pin 44 has an angle θ of 80 degrees or more and 180 degrees or less. It may be arranged at such a position.

<Modification 5>
In the embodiment and the modification described above, the operation unit of the electronic timepiece 100 (100a) includes the crown 16, the winding stem 16a, the operation buttons 17 and 18, and the button shafts 17a and 18a. Only some of them may be provided, or other elements (for example, operation buttons) may be included.

<Modification 6>
In the embodiment and the modification described above, the antenna body 40 is surrounded by the upper surface T1, the outer peripheral surface T2, the bottom surface T3, the upper inclined surface TP1, and the inclined surface TP2, as shown in FIGS. The dielectric 401 having a pentagonal cross-sectional shape is formed as a base material. However, the dielectric serving as the base material of the antenna body may have a cross-sectional shape other than the pentagonal shape.
For example, the electronic timepiece 100 may include an antenna body 40a shown in FIG. 14A is a perspective view of an antenna body 40a according to Modification 6. FIG. 14B is a plan view of the antenna body 40a. FIG. 14C is a plan view of the antenna body 40a. It is the partial sectional view cut | disconnected by the GG line | wire shown in FIG.
The antenna body 40a uses a dielectric 401a having a quadrangular cross-sectional shape surrounded by an upper surface T1, an outer peripheral surface T2, a bottom surface T3, and an inner peripheral surface T4 as a base material, and an antenna pattern 402a on the upper surface T1 of the dielectric 401a. 403a are formed, and a power feeding portion 404a is formed on the top surface T1, the inner peripheral surface T4, and the bottom surface T3 of the dielectric 401a. The antenna pattern 403a is electrically connected to the power supply pin 44 via the power supply unit 404a. Therefore, a predetermined potential is supplied to the antenna pattern 403a through the power feed pin 44.
In the above-described embodiment and modification, the antenna pattern 402 (or 402a) has the notch 405 (or notch 405a) and is formed in a shape in which a part of the annular shape is notched. The part 405 (or the notch part 405a) may not be provided, but may be formed in an annular shape.

<Modification 7>
In the embodiment and the modification described above, the antenna body 40 (or the antenna body 40a) includes the parasitic antenna pattern 402 (or 402a) and the antenna pattern 403 (or 403a) that receives a predetermined potential. However, the present invention is not limited to such a form, and does not include the parasitic antenna pattern 402 (or 402a), but includes only the antenna pattern 403 (or 403a) that receives a predetermined potential. It may be.
For example, the electronic timepiece 100 may include an antenna body 40b shown in FIG. FIG. 15A is a perspective view of an antenna body 40b according to Modification 7. FIG. 15B is a plan view of the antenna body 40b. In the antenna body 40b, an antenna pattern 403b that receives power of a predetermined potential from the power feed pin 44 via the power feed portion 404b is formed on the upper inclined surface TP1 of the dielectric 401. The antenna body 40b is set to an antenna length such that the antenna pattern 403b resonates with a satellite signal, and does not include a parasitic antenna pattern. In this figure, the antenna pattern 403b is formed to have a C shape having a notch 405b. However, the antenna pattern 403b is formed to have an annular shape (O shape) without the notch 405b. It may be a thing.
For example, the electronic timepiece 100 may include an antenna body 40c shown in FIG. FIG. 16 is a perspective view of an antenna body 40 c according to Modification 7. In the antenna body 40c, an antenna pattern 403c that receives power of a predetermined potential from the power feed pin 44 via the power feed portion 404c is formed on the upper surface T1 of the dielectric 401a having a quadrangular cross-sectional shape. The antenna body 40c is set to an antenna length such that the antenna pattern 403c resonates with a satellite signal, and does not include a parasitic antenna pattern.
Further, in the above-described embodiments and modifications, the antenna body 40 (or 40a, 40b, 40c) is fed from one feeding unit 404 (or 404a, 404b, 404c). It may be that which is balancedly fed from the feeding section. For example, the electronic timepiece 100 may include an antenna body 40d shown in FIG. FIG. 17 is a perspective view of an antenna body 40d according to Modification 7. The antenna body 40d includes an antenna pattern 403d formed on the upper surface of the dielectric 401a, and two power feeding portions 404d and 405d that are electrically connected to the antenna pattern 403d. The antenna body 40d is balancedly fed via two feeding pins 44a and 44b that are electrically connected to the two feeding parts 404d and 405d. In this case, the electronic timepiece 100 preferably includes a balun that is a balanced-unbalanced conversion element. The balun converts the balanced signal output from the antenna body 40b via the power supply pins 44a and 44b into an unbalanced signal and then outputs it to the GPS receiver 26.

<Modification 8>
In the above-described embodiments and modifications, the antenna pattern and the power feeding part are directly formed on the surface of the dielectric by plating or silver paste printing, but the antenna pattern and the power feeding part are partly or entirely. Alternatively, it may be embedded in a dielectric.
For example, the electronic timepiece 100 may include an antenna body 40e shown in FIG. FIG. 18 is a partial cross-sectional view of an antenna body 40e according to Modification 8. In the antenna body 40e, an antenna pattern 402e and an antenna pattern 403e are embedded in a dielectric 401e having a pentagonal cross-sectional shape, and a part of the power feeding unit 404e is embedded in the dielectric 401e. Such a structure can be manufactured by insert molding. According to the insert molding, the antenna body can be manufactured at a lower cost than the case where the antenna pattern is formed by plating or silver paste printing.

<Modification 9>
In the above-described embodiment and Modifications 1 to 7, the antenna pattern and the power feeding part are formed directly on the surface of the dielectric, but part or all of the antenna pattern and the power feeding part are flexible. It may be affixed on a tape.
For example, the electronic timepiece 100 may include an antenna body 40f shown in FIG. FIG. 19 is a partial cross-sectional view of an antenna body 40f according to Modification 9. The antenna body 40f has an antenna pattern 402f and an antenna pattern 403f attached on a flexible tape 500f. For example, the electronic timepiece 100 may include an antenna body 40g shown in FIG. FIG. 20 is a partial cross-sectional view of an antenna body 40g according to Modification 9. The antenna body 40g has an antenna pattern 402f, an antenna pattern 403f, and a power feeding unit 404g attached on a flexible tape 500g.
These structures can be manufactured by, for example, forming an antenna pattern and a power feeding portion on a flexible tape in advance, and then sticking the flexible tape to a dielectric that is a base material. According to this manufacturing method, the antenna body can be manufactured at a lower cost than when the antenna pattern is formed by plating or silver paste printing.

<Modification 10>
In the embodiment and the modification described above, the antenna body has a circular shape in plan view as shown in FIG. 5B, for example, but may have a shape other than a circle.
For example, the electronic timepiece 100 may include an antenna body 40h illustrated in FIG. FIG. 21 is a plan view of an antenna body 40h according to the tenth modification. In the antenna body 40h, an antenna pattern 402h and an antenna pattern 403h are formed on a dielectric body 401h having a square hollow shape in plan view.

<Modification 11>
In the embodiment and the modification described above, the electronic timepiece 100 includes the ground plate 90, but may not include the ground plate 90. In this case, the back cover 85 and the case body 81 function as a ground plate.

<Modification 12>
In the embodiment and the modification described above, the time display unit includes the dial 11, the pointer shaft 12, the pointer 13, the small clock 14, the indicator 15, and the date display unit 19, but the present invention is in such a mode. It is not limited, and the time display unit only needs to include at least the pointer shaft 12 and the pointer 13.
When the time display unit does not include the small clock 14, the indicator 15, and the date display unit 19, the drive mechanism 30 includes step motors M1 and M2 that drive the pointer shaft 12 among the plurality of step motors M1 to M5. What is necessary is just to provide, and it is not necessary to provide the step motor M3-M5 for driving the axis | shaft 141, the axis | shaft 151, and the date display part 19. FIG. In this case, the antimagnetic plates S1 to S3 may be provided in a range that covers part or all of the step motors M1 and M2.

<Modification 13>
In the embodiment and the modification described above, the time display unit includes the dial 11, the pointer shaft 12, and the pointer 13 (or, in addition to these, the small clock 14, the indicator 15, and the date display unit 19). However, the time display unit may further include a liquid crystal panel.

100 …… Electronic clock with built-in antenna, 11 …… Dial plate, 12 …… Pointer shaft, 13 (13a, 13b, 13c) …… Pointer, 16 …… Tunu, 16a …… Makima, 26 …… GPS receiver 27 ... secondary battery, 28 ... battery housing, 30 ... drive mechanism, 38 ... ground plane, 40 ... antenna body, 44 ... feed pin, 70 ... control unit, 80 ... exterior case body 81 …… Case, 82 …… Glass edge, 83 …… Dial ring, 84 …… Cover glass, 85 …… Back cover, 87 …… Solar panel, 90 …… Grand plate, S1 to S3… Magnetic shield.

Claims (10)

An exterior case,
An antenna body housed in the exterior case and receiving a signal;
A time display unit having a pointer and a dial and capable of displaying the time;
A drive unit housed in the exterior case and having a step motor for driving the pointer;
Battery,
A magnetic-resistant plate provided between the battery and the step motor;
With
The magnetic plate is
In a plan view, overlaps a part or all of the stepper motor, Ri least a portion Do weight of the battery, and does not overlap with some or all of the antenna body,
An electronic timepiece with a built-in antenna.   When viewed in plan,
  A part or all of the step motor;
  A part or all of the battery overlaps,
  The electronic timepiece with a built-in antenna according to claim 1, wherein:   The guidelines are:
  It can rotate around the pointer shaft,
  The pointer shaft is
  When viewed in plan, it overlaps at least a part of the battery,
  The antenna built-in type electronic timepiece according to claim 1, wherein the electronic timepiece has a built-in antenna.   The signal is a satellite signal;
  The electronic timepiece with a built-in antenna according to any one of claims 1 to 3, wherein the electronic timepiece has a built-in antenna. A cover glass that closes one of the two openings of the outer case;
A back cover that closes the other of the two openings;
With
The distance between the back cover and the dial is
Longer than the distance between the back cover and the antenna body,
The electronic timepiece with a built-in antenna according to claim 1, wherein the electronic timepiece has a built-in antenna. The antenna body is
Having an annular shape, and
Provided on the inner periphery of the antenna body, and has an inclined surface that moves away from the back cover toward the center of the antenna body,
The dial is
When viewed in plan, overlaps at least a portion of the inclined surface;
The antenna built-in type electronic timepiece according to claim 5 . Comprising a ground of the antenna body provided between the antenna body and the back cover;
The outer case is
A case body formed of a conductive material and electrically connected to the ground;
The back cover is
Formed of a conductive material and electrically connected to the case body,
The antenna built-in type electronic timepiece according to claim 5 or 6 , characterized by the above. The battery is
A secondary battery that feeds power to the antenna body;
The antenna built-in electronic timepiece is
A battery storage unit for storing the secondary battery;
The antenna body is
When viewed in plan, it does not overlap the battery compartment,
The antenna built-in type electronic timepiece according to claim 1, wherein the electronic timepiece has a built-in antenna. Comprising a main plate to which the drive unit is attached;
The base plate is made of plastic,
The antenna built-in type electronic timepiece according to claim 1, wherein the electronic timepiece has a built-in antenna. The magnetic plate is made of iron,
10. The antenna built-in type electronic timepiece according to claim 1, wherein the electronic timepiece has a built-in antenna.

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