JP6947050B2 - Electronic clock - Google Patents

Description

The present invention relates to an electronic clock having a satellite signal receiving function and a short-range wireless communication function.

Patent Document 1, for example, discloses an electronic clock that corrects the time by receiving a position information satellite signal from a position information satellite such as GPS (Global Positioning System).

Japanese Unexamined Patent Publication No. 2016-217936

The conventional electronic clock described above has a problem that the time adjustment is hindered in a situation where it is difficult to receive a satellite signal. In order to solve this problem, a means for an electronic clock to acquire information used for time adjustment from a nearby device, for example, by performing short-range wireless communication by Bluetooth (registered trademark) with the device. It is conceivable to take.

However, the position information satellite signal and the short-range radio signal of Bluetooth are both radio signals having a frequency higher than that in the ultra-short wave band, and there are strict requirements regarding the configuration and installation conditions of the antenna. On the other hand, in many wearable electronic watches such as wristwatches, the case is conductive and the space inside the case is narrow, so this type of electronic watch is said to have a good antenna installation environment. hard. For this reason, conventionally, it has been difficult for an electronic clock to properly perform both satellite signal reception and short-range wireless communication.

The electronic clock according to one aspect of the present invention includes a flat plate-shaped time display unit, a conductive case, a short-range wireless communication antenna and a short-range wireless communication unit that perform short-range wireless communication housed in the conductive case. And a plane antenna for receiving the position information satellite signal housed in the conductive case and a satellite signal receiving unit, and the short-range radio in a plane view along the normal direction of the time display unit. The communication antenna and the plane antenna overlap with the time display unit, the frequency of the short-range wireless communication is higher than the frequency of the position information satellite signal, and the thickness of the short-range wireless communication antenna in the normal direction of the time display unit. The center is located closer to the time display unit than the thickness center of the flat antenna.

According to this aspect, since the thickness center of the short-range wireless communication antenna in the normal direction of the time display unit is located on the time display unit side from the thickness center of the flat antenna, the short-range distance having a higher frequency than the position information satellite signal. Radio signals can be appropriately transmitted and received via a short-range wireless communication antenna. Therefore, according to this aspect, both reception of satellite signals and short-range wireless communication can be appropriately performed.

Another preferred embodiment is that the time display unit displays the time by a pointer, and the motor that drives the pointer does not overlap with the planar antenna in the plan view.

According to this aspect, since the plane antenna is located in the region where the motor is avoided in the plan view, the movement including the motor and the plane antenna can be thinned and the electronic timepiece can be miniaturized.

Another preferred embodiment is provided with a solar cell that supplies electric power to the satellite signal receiving unit, and is characterized in that the electrode layer of the solar cell is provided in a region that does not overlap with the planar antenna in the plan view.

According to this aspect, the satellite signal receiving unit operated by the electric power from the solar cell can receive the weak position information satellite signal by the plane antenna without being disturbed by the solar cell.

Another preferred embodiment is characterized in that a magnetic resistance plate is provided in a region that does not overlap with the plane antenna in the plan view.

According to this aspect, the influence of the magnetic resistance plate on the reception operation of the flat antenna is reduced, and a weak position information satellite signal can be received by the flat antenna.

In another preferred embodiment, the first circuit board on which the short-range wireless communication antenna is arranged and the second circuit board on which the planar antenna is arranged are provided, and the first circuit board is the second circuit board. It is characterized in that it is arranged closer to the time display unit side than the circuit board.

According to this aspect, since the short-range wireless communication antenna arranged on the first circuit board is closer to the clock display side than the planar antenna arranged on the second circuit board, the communication performance of short-range wireless communication can be improved. Can be enhanced.

In another preferred embodiment, the first circuit board and the planar antenna overlap in a side view perpendicular to the normal direction of the time display unit, and the first circuit board and the planar antenna are overlapped in the planar view. Is characterized in that they do not overlap.

According to this aspect, it is possible to make the movement thinner by bringing the first circuit board and the second circuit board closer to each other.

Another preferred embodiment is that a plane including the normal passing through the center of the time display unit and the center of the plane antenna is located between the satellite signal receiving unit and the short-range wireless communication unit. It is a feature.

According to this aspect, the satellite signal receiving unit and the short-range wireless communication unit can be separated from each other to prevent mutual interference between the two, and the communication performance between the two can be improved.

It is a figure which shows the use environment of the electronic clock which is 1st Embodiment of this invention. It is a top view of the electronic clock. It is sectional drawing which cut the electronic clock by the plane passing through the 12 o'clock position and 6 o'clock position. It is an exploded perspective view of the movement of the electronic timepiece. It is sectional drawing of the solar cell panel in the electronic timepiece. It is sectional drawing of the plane antenna in the electronic timepiece. It is a block diagram which shows the circuit structure of the electronic clock. It is a figure which shows the frame structure of GPS. It is a figure which shows the TLM word composition of GPS. It is a figure which shows the HOW word composition of GPS. It is a figure which illustrates the local time information used for positioning. It is a figure which illustrates the change history of a local time information. It is a block diagram which shows the functional structure of the control part of the electronic timepiece. It is a flowchart which shows the operation of the electronic clock. It is a flowchart which shows the operation of the electronic clock. It is a flowchart which shows the operation of the electronic clock. It is a flowchart which shows the operation of the electronic clock. FIG. 5 is a cross-sectional view of an electronic clock according to a second embodiment of the present invention cut by a plane passing through the 12 o'clock position and the 6 o'clock position. It is sectional drawing which cut | cut the electronic clock by the plane passing through the 12 o'clock position and the clock center, and the plane passing through the clock center and 4 o'clock position. It is an exploded perspective view of the movement of the electronic timepiece. It is a top view of the movement of the electronic clock. It is a top view which shows the structural example of the calendar window in the electronic timepiece. It is a perspective view which shows the mounting example of the 1st circuit board in the electronic timepiece. It is a perspective view which shows the mounting example of the 2nd circuit board in the electronic timepiece. It is a top view which shows another example of a solar cell panel. It is sectional drawing which shows the solar cell panel.

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

<First Embodiment>
Hereinafter, the electronic clock 1 according to the first embodiment of the present invention will be described. In the present embodiment, the cover glass 33 side of the electronic timepiece 1 will be referred to as the front surface side or the upper side, and the back cover 34 side will be referred to as the back surface side or the lower side.

[Usage environment of electronic clock]
FIG. 1 is a diagram showing a usage environment of the electronic clock 1 according to the present embodiment. As shown in FIG. 1, the electronic clock 1 according to the present embodiment has a function of receiving GPS satellite signals which are position information satellite signals from a plurality of GPS satellites S orbiting a predetermined orbit over the earth. It has a function to communicate with a mobile information terminal R such as a smartphone by Bluetooth, which is a kind of short-range wireless communication.

[Electronic clock configuration]
FIG. 2 is a plan view of the electronic clock 1, and FIG. 3 is a cross-sectional view showing a configuration in which the electronic clock 1 is cut in a plane passing through the 12 o'clock position and the 6 o'clock position. Further, FIG. 4 is an exploded perspective view of the movement 2 of the electronic clock 1.

[Case]
As shown in FIGS. 2 and 3, the electronic watch 1 includes an outer case 30, a cover glass 33, and a back cover 34, which are watch cases. The outer case 30 has a configuration in which a bezel 32 is fitted to a cylindrical conductive case 31. The case 31 has two openings. Of these two openings, the opening on the front surface side is closed by the cover glass 33 via the bezel 32, and the opening on the back surface side is closed by the back cover 34. Metallic materials such as SUS (stainless steel), titanium alloy, aluminum, and BS (brass) are used for the case (body) 31, the bezel 32, and the back cover 34. In this embodiment and the second embodiment described later, the entire case (body) 31, bezel 32, and back cover 34 constitute a conductive case. However, only the case (body) 31 and the back cover 34 are conductive cases, and the bezel 32 is made of ceramics such as _{zirconia (ZrO 2} ), titanium carbide (TiC), titanium nitride (TiN), and alumina (Al ₂ O _3). May be used. If the bezel 32 is made of ceramic, the ceramic transmits radio waves, which has an advantage of improving wireless communication performance. In addition, ceramic is hard, has excellent scratch resistance, and has the advantage of being able to maintain its aesthetic appearance for a long period of time. Further, the exterior case 30 may be a one-piece case in which the case and the back cover are integrated. A crown 38 and buttons 361-364 are provided on the side surface of the outer case 30 as external operating members.

[Dial]
As shown in FIG. 3, a dial 11 which is a circular flat plate-shaped time display unit is arranged on the inner peripheral side of the bezel 32 via a ring-shaped dial ring 35 made of plastic. The dial 11 is made of a plastic material such as polycarbonate which is non-conductive and has a translucency that allows at least a part of light to pass through.

As shown in FIGS. 2 and 3, a pointer shaft 11x is located at the center of the plane of the dial 11, and a second hand 21, a minute hand 22, and an hour hand 23 for indicating the local time are attached to the pointer shaft 11x. There is. Hereinafter, the second hand, the minute hand, and the hour hand are collectively referred to as a pointer. The pointer shaft 11x is composed of three pointer shafts (rotating shafts) to which the pointers 21, 22 and 23 are attached.

Further, as shown in FIG. 2, the dial 11 is provided on the first sub dial 12 provided on the 6 o'clock position side, the second sub dial 13 provided on the 10 o'clock position side, and the 2 o'clock position side. A third sub-dial 14 is provided, and a calendar window 15 for visually recognizing the calendar is provided.

The pointer shaft 12x is located at the center of the plane of the first sub dial 12. A minute hand 24 and an hour hand 25, which are pointers for dual time display, are attached to the pointer shaft 12x. Further, a number indicating the time is written on the ring portion 26 forming the outer circumference of the first sub dial 12.

A pointer shaft 13x is located at the center of the plane of the second sub dial 13, and a pointer 27 for displaying the mode and the remaining battery level is attached to the pointer shaft 13x. Further, in the ring portion 28 forming the outer circumference of the second sub dial 13, a crescent sickle-shaped scale indicating the remaining battery level is written from the 9 o'clock position to the 8 o'clock position on the left half, and the remaining amount is indicated by the pointer 27. Is to be displayed. Further, the annulus 28 is marked with a “1” indicating that the time measurement reception process is being executed and a “4+” mark indicating that the positioning reception process is being executed. It is configured so that it can be instructed.

A pointer shaft 14x is located at the center of the plane of the third sub-dial 14, and a pointer 29 for displaying a chronograph is attached to the pointer shaft 14x.

[Dial ring]
As shown in FIG. 3, a dial ring 35 made of a synthetic resin (for example, ABS resin) which is a non-conductive member is provided on the surface side of the dial 11. The dial ring 35 is arranged along the periphery of the dial 11, and the inner peripheral surface is an inclined surface. If the dial ring 35 is molded of plastic, reception performance can be ensured, and a complicated shape can be formed to improve the design.

[Bezel]
As shown in FIG. 2, the surface region 32a of the bezel 32 is numerically represented with time difference information indicating the time difference from Coordinated Universal Time (UTC). Further, in the surface area 32b of the bezel 32, city information indicating the name of the representative city of the time zone is written. City information can be expressed by a three-letter code that abbreviates the city name in a three-letter alphabet, for example, "TYO (Tokyo)".

[Movement]
As shown in FIG. 3, the movement 2 is housed in the region on the back surface side of the dial 11 when viewed from the cover glass 33 side. As shown in FIGS. 3 and 4, the movement 2 includes a solar cell panel 80, a first anti-magnetic plate 91, a calendar car 20, a main plate 125, and a drive, which are sequentially arranged from the dial 11 side toward the back cover 34. It includes a mechanism 140 (not shown in FIG. 4), a train wheel receiver 127 (not shown in FIG. 4), a circuit board 720, a spacer 128 (not shown in FIG. 4), a circuit holding plate 725, and a secondary battery 130. In the present embodiment, a planar antenna 40 for receiving a GPS satellite signal, which is a position information satellite signal, is arranged on the circuit board 710. Further, in the present embodiment, the back surface protective material of the solar cell panel 80 functions as a short-range wireless communication antenna for transmitting and receiving short-range wireless communication signals. The calendar car 20, the main plate 125, the train wheel receiver 127, and the spacer 128 are made of plastic so as not to affect the communication with the flat antenna 40 and the short-range wireless communication antenna (solar cell panel 80). The details of the planar antenna 40 and the short-range wireless communication antenna will be described later.
Hereinafter, each element constituting the movement 2 will be described in order from the dial 11 side toward the back cover 34.

[Solar cell panel]
As shown in FIGS. 3 and 4, the solar cell panel 80 is located on the back side of the dial 11 when viewed from the cover glass 33 side. As shown in FIG. 5, for example, the solar cell panel 80 includes a translucent surface protective material 81, a surface electrode 82 composed of a transparent electrode (TCO: Transparent Conductive Oxide), a p-type semiconductor layer 83p, and an intrinsic semiconductor. It is formed by laminating an amorphous silicon semiconductor thin film 83 composed of a layer 83i and an n-type semiconductor layer 83n, an aluminum back surface electrode 84, an insulating film 85 made of a resin film, and a back surface protective material 86 made of stainless steel. be. Then, in the solar cell panel 80, a voltage is generated between the front electrode 82 and the back electrode 84 by receiving light.

The solar cell panel 80 is formed with an opening 820 that is planarly overlapped with the calendar window 15 of the dial 11 and through holes 831 to 834 through which the pointer shafts 11x to 14x are inserted. Further, as shown in FIG. 4, the solar cell panel 80 has a cutout portion 810 formed at a portion overlapping the flat antenna 40 in a plan view along the normal direction of the dial 11. The details of the notch 810 will be described later.

The solar cell panel 80 is divided into a plurality of solar cells, and each cell is connected in series. In the solar cell panel 80, the light receiving area of each divided solar cell, that is, the area of the area where the through hole, the notch, or the like is not formed in each solar cell is equal to each other. This equalizes the capacitance between the front electrode 82 and the back electrode 84 of each solar cell, generates an equal voltage in a state where an equal amount of electric charge is generated in each solar cell, and makes the load of each solar cell the same. To do. In the example shown in FIG. 4, the number of solar cells in the solar cell panel 80 is 4, but it may be 5 or more, and may be set according to the required power generation voltage.

As shown in FIG. 4, a convex portion 87 for taking out an electrode projects around the solar cell panel 80. On the back surface of the electrode extraction convex portion 87 (the back surface when viewed from the cover glass side), positive and negative electrodes of the solar cell panel 80, that is, positive and negative electrodes of a DC power supply formed by connecting a plurality of solar cells in series are formed. (Not shown). The positive electrode and the negative electrode of the solar cell panel 80 are composed of a coil spring or the like, and as shown in FIG. 4, a pair of conductive members 88 arranged in the through holes of the main plate 125 are used to supply power for the positive electrode and the negative electrode of the circuit board 720. It is conducting to the terminal.

Further, in the present embodiment, the back surface protective material 86 made of stainless steel of the solar cell panel 80 is used as the short-range wireless communication antenna. As shown in FIG. 4, a part of the back surface protective material 86 of the solar cell panel 80 is a power feeding unit 86Q. As shown in FIG. 4, the power feeding unit 86Q is conducted to the short-range wireless communication module 150 arranged on the circuit board 720 by the conduction member 89 arranged in the through hole of the main plate 125.

Since the dial 11 covering the solar cell panel 80 has translucency, the solar cell panel 80 arranged on the back surface side of the dial 11 can be seen through when viewed from the front surface side of the electronic timepiece 1. Therefore, the color of the dial 11 looks different between the area where the solar cell panel 80 is arranged and the area where the solar cell panel 80 is not arranged. A design accent may be added to the dial 11 so that this color difference is not noticeable.

Further, since the notch 810 is formed in the solar cell panel 80, the color tone of the dial 11 of the portion overlapping the notch 810 may look different from other portions. To prevent this, a plastic sheet of the same color as the solar cell panel 80 (for example, dark blue or purple) may be stacked under the solar cell panel 80, or an electrode that shields radio waves without cutting out the entire solar cell panel 80. The color tone may be matched by removing only the portion of the layer that overlaps with the flat antenna 40 in a plane, leaving the resin film layer as the base material.

[First anti-magnetic plate]
In recent years, high-performance magnets have come to be widely used in mobile information band terminals such as smartphones. For this reason, electronic watches are required to have anti-magnetic properties. Therefore, in an electronic watch, a magnetic resistant plate made of a high magnetic permeability material such as pure iron is arranged at a position where it overlaps with the motor in a plane in order to bypass an external magnetic field and prevent a malfunction of the motor. Here, the motor is composed of a coil, a stator, and a rotor, of which the coil portion is not easily affected by an external magnetic field, so it does not necessarily have to overlap with the magnetic resistance plate. In the electronic clock 1 according to the present embodiment, two such magnetic resistance plates are provided. The first is a first anti-magnetic plate 91 provided below the solar cell panel 80. The first anti-magnetic plate 91, together with the second anti-magnetic plate 92 (described later), which is the second anti-magnetic plate, sandwiches the motor from above and below to prevent the motor from malfunctioning. Here, since the first anti-magnetic plate 91 is a conductive plate, it interferes with radio wave reception. Therefore, the first anti-magnetic plate 91 has a planar shape that overlaps with the motor of the drive mechanism 140 and does not overlap with the planar antenna 40 in a plan view along the normal direction of the dial 11.

[Calendar car]
On the main plate 125, a calendar car 20 formed in a ring shape and having a date displayed on the surface is arranged. The calendar car 20 is made of a non-conductive member such as plastic. Here, the calendar car 20 overlaps with at least a part of the plane antenna 40 in a plan view. However, since the calendar car 20 is made of a non-conductive material, it does not adversely affect the reception of the position information satellite signal by the plane antenna 40. The calendar car is not limited to the day car, but may be a day car that displays the day of the week, a month car that displays the month, or the like.

[Main plate]
As shown in FIG. 4, one end of each of the pointer shafts 11x, 12x, 13x and 14x is pivotally supported on the main plate 125. The other ends of the pointer shafts 11x, 12x, 13x and 14x pass through the through holes 831, 832, 833 and 834 formed in the solar cell panel 80, and the through holes 16 and 17 provided in the dial 11 are further provided. , 18 and 19, respectively, and project toward the cover glass 33 side. Then, the above-mentioned pointers 21, 22 and 23 are attached to the pointer shaft 11x protruding from the dial 11, the above-mentioned pointers 24 and 25 are attached to the pointer shaft 12x, and the above-mentioned pointer shaft 13x is described above. The pointer 27 is attached, and the pointer 29 described above is attached to the pointer shaft 14x.

[Drive mechanism]
The drive mechanism 140 has pointers 21, 22, 23, 24, 25, 27 and 29 provided on the dial 11, a plurality of step motors for driving the calendar wheel 20, and a plurality of train wheels (not shown). .. Each step motor in the drive mechanism 140 is attached to the main plate 125, and each train wheel is pivotally supported between the main plate 125 and the train wheel receiver 127. FIG. 4 illustrates gears 146 that are part of these train wheels. The gear 146 is a gear that drives the calendar wheel 20. The motors and train wheels constituting the drive mechanism 140 are provided in a region that does not overlap with the planar antenna 40 in a plan view along the normal direction of the dial 11. As described above, in the present embodiment, since the motors and train wheels that constitute the drive mechanism are arranged so as to avoid the plane antenna 40 in the plan view, the movement 2 including the plane antenna 40 and the drive mechanism is made thinner, and the electronic clock 1 is made smaller. Can be transformed into.

[Circuit board]
As shown in FIG. 4, a short-range wireless communication module 150, a control display module 60, a power supply module 70, and a flat antenna 40 are arranged on the surface of the circuit board 720. Further, as shown in FIGS. 3 and 4, a GPS receiving module 50 is arranged on the back surface of the circuit board 720.

[Plane antenna]
The planar antenna 40 receives a 1.575 GHz position information satellite signal transmitted from a GPS satellite. As shown in FIG. 3, the flat antenna 40 is a patch antenna in which a conductive antenna electrode 42 is laminated on a ceramic dielectric base material 41. FIG. 6 is a cross-sectional view showing the planar antenna (patch antenna) 40.

The planar antenna 40 can be manufactured as follows. First, barium titanate having a relative permittivity of about 80 to 200 is molded into a desired shape by a press machine as a main raw material, and after firing, ceramics to be a dielectric base material 41 of an antenna are completed. The GND electrode 43 (FIG. 3), which serves as the ground (GND) of the antenna, is formed by screen-printing a paste material such as silver (Ag) on the back surface (the surface on the circuit board 720 side) of the dielectric substrate 41. (Not shown). On the surface of the dielectric base material 41 (the surface on the main plate 125 and the dial 11 side), an antenna electrode 42 that determines the frequency of the antenna and the polarization of the received signal is configured in the same manner as the GND electrode 43. The antenna electrode 42 is formed to be one size smaller than the surface of the dielectric base material 41, and an exposed surface on the surface of the dielectric base material 41 around which the antenna electrode 42 is not laminated is provided around the antenna electrode 42. Be done.

In FIG. 6, the dotted line 45 indicates the radio wave received by the flat antenna 40, and the arrow 46 indicates the electric line of force. When the patch antenna is square, it resonates when one side has a half wavelength, and when it is circular, it resonates when the diameter is about 0.58 wavelength, but if a dielectric is used, it can be miniaturized by the wavelength shortening effect.

In the flat antenna 40, a strong electric field along the edge of the patch (antenna electrode 42) is radiated from the edge toward the space, so that the lines of electric force near the antenna become strong and the influence of nearby metals and dielectrics is exerted. Easy to receive. Therefore, in GPS reception, the distance between the metal outer case 30 and the antenna electrode 42 needs to be at least 3 mm, ideally about 4 mm.

In the present embodiment, as shown in FIG. 3, a wall portion 125v protruding from the periphery of the main plate 125 toward the back cover 34 is arranged between the flat antenna 40 and the outer case 30, and the flat antenna 40 Is arranged at a position separated from the inner peripheral surface of the outer case 30 by a predetermined dimension or more. Therefore, deterioration of reception characteristics caused by bringing the flat antenna 40 closer to the metal outer case 30 can be suppressed, and the reception performance required for the electronic timepiece 1 can be ensured.

In the planar antenna 40 of the present embodiment, the dielectric base material 41 has, for example, a substantially square surface shape and a side dimension of about 11 mm. The surface shape of the antenna electrode portion 42 is, for example, substantially square, and the size of one side is about 8 to 9 mm. If the flat antenna 40 is thin, the antenna gain deteriorates. Therefore, the flat antenna 40 needs to have a thickness of 3 to 4 mm. The four corners of the dielectric base material 41 are preferably corner-cut to prevent cracking, but those without corner cuts may be used.

Further, as shown in FIG. 4, among the four side surfaces of the dielectric base material 41, the side surface 41B along the outer peripheral surface of the circuit board 720, that is, the side surface 41B having the shortest distance from the outer case 30, is the circuit board 720. It is formed so as to bulge outward in a substantially arc shape along the outer circumference of the. As a result, the volume of the dielectric base material 41 can be increased within a range in which the dielectric base material 41 does not protrude from the outer peripheral surface of the circuit board 720. If the volume of the dielectric base material 41, which is a high dielectric material, can be increased, the flat antenna 40 is equivalently separated from the outer case 30 due to the wavelength shortening effect of the dielectric base material 41, and the flat antenna 40 is separated from the outer case 30. The influence of the case 31 can be reduced.

The planar antenna 40 is mounted on the front surface of the circuit board 720 and is electrically connected to the GPS receiving module 50 mounted on the back surface of the circuit board 720. Further, the circuit board 720 functions as a ground plate (ground plane) by conducting the GND electrode 43 (see FIG. 6) of the flat antenna 40 to the ground pattern of the circuit board 720.
Further, in the planar antenna 40, not only the antenna electrode portion 42 provided on the dielectric base material 41 but also the dielectric base material 41 plays an important role in the reception sensitivity. Therefore, the mounting position of the flat antenna 40 needs to consider not only the antenna electrode portion 42 but also the entire flat antenna 40 including the dielectric base material 41.
The same applies to the short-range wireless communication antenna composed of the back surface protective material 86 of the solar cell panel 80, and the strength of the reception sensitivity depends not only on the front surface of the back surface protective material 86 but also on the overall position of the back surface protective material 86. NS.

[Positional relationship between short-range wireless communication antenna, flat antenna, short-range wireless communication module, and GPS receiving module]
Here, the positional relationship between the short-range wireless communication antenna, the flat antenna 40, the short-range wireless communication module 150, and the GPS receiving module 50 in the present embodiment will be described. In the present embodiment, the back surface protective material 86 of the solar cell panel 80 functions as a short-range wireless communication antenna. Here, the solar cell panel 80 is on the back side of the dial 11 as described above. Therefore, in the present embodiment, the thickness center of the short-range wireless communication antenna is located closer to the dial 11 side than the thickness center of the flat antenna 40. This arrangement is because the frequency of short-range wireless communication is higher than the frequency of the position information satellite signal. The higher the frequency, the easier it is for the radio waves to be attenuated. In particular, it is necessary to receive weak radio waves when both antennas are housed in the conductive outer case 30. Also, the focus was on the center of the thickness of the short-range wireless communication antenna and the center of the thickness of the flat antenna 40. The reception sensitivity of short-range wireless communication is determined by the entire short-range wireless communication antenna, and the position is determined by the entire flat antenna 40. This is because the reception sensitivity of the information satellite signal is determined. As described above, since the thickness center of the short-range wireless communication antenna is arranged closer to the dial 11 side than the thickness center of the flat antenna 40, both the reception of the position information satellite signal and the short-range wireless communication are appropriately performed. be able to. The thickness center of the flat antenna 40 means the center of the range in which the flat antenna 40 is arranged in the normal direction of the dial 11. Similarly, the thickness center of the short-range wireless communication antenna means the center of the range in which the short-range wireless communication antenna is arranged in the normal direction of the dial 11.
Further, in a plan view, the plane antenna 40 is located in the notch 810 of the solar cell panel 80. That is, in a plan view, the plane antenna 40 and the solar cell panel 80 do not overlap. This is so that the solar cell panel 80 does not interfere with the reception of GPS satellite signals by the flat antenna 40. In the present embodiment, the short-range wireless communication module 150 processes a high-frequency signal of 2.4 GHz, and the GPS receiving module 50 processes a high-frequency signal of 1.5 GHz. In this way, the frequencies of the signals handled by both modules are high and close to each other. Therefore, a means for preventing the operations of both modules from interfering with each other is required. Therefore, in this embodiment, the following measures are taken. In FIG. 4, the straight line 720Y represents a straight line in which the plane including the normal of the dial 11 and the center of the flat antenna 40 intersects the circuit board 720. In the present embodiment, by arranging the short-range wireless communication module 150 and the GPS receiving module 50 on both sides of the straight line 720Y, both modules are sufficiently separated from each other so that the operations of both modules do not interfere with each other.

[Second anti-magnetic plate]
In FIGS. 3 and 4, a second magnetic resistance plate 92 is arranged below the circuit board 720. The magnetic resistance plate 92 is a means for shielding the external magnetic field so that the motor of the drive mechanism 140 described above does not malfunction due to the influence of the external magnetic field. As described above, in the present embodiment, the motor of the drive mechanism 140 is sandwiched from above and below by the first anti-magnetic plate 91 and the second anti-magnetic plate 92.

[Circuit presser plate]
In the present embodiment, the ground pattern of the circuit board 720 is conducted to the metal case 31 and the back cover 34 via the circuit holding plate 725, so that the case 31 and the back cover 34 are also used as the ground plane. More specifically, in the present embodiment, as shown in FIGS. 3 and 4, the back cover conduction spring 725A for conducting the back cover 34 is integrally formed on the circuit holding plate 725 that holds down the circuit board 720. The ground pattern of the circuit board 720 is conducted to the back cover 34 and the case 31 via the circuit holding plate 725 and the back cover conduction spring 725A, and is used as a ground plane. By using the back cover 34 and the case 31 as the ground plane, the area of the ground plane can be increased, the antenna gain can be improved, and the antenna characteristics can be improved. Further, since the back cover conduction spring 725A provided by processing the circuit holding plate 725 is conducted to conduct the back cover 34 made of metal, the back cover 34 can be used as a ground, and the static electricity resistance performance and the reception performance can be improved. .. In particular, if a plurality of back cover conduction springs 725A are provided, the static electricity resistance performance and the reception performance can be further improved.

[Secondary battery]
As shown in FIG. 4, the secondary battery 130 is a lithium ion battery formed in a planar circle. The secondary battery 130 supplies electric power to the drive mechanism 140, the short-range wireless communication module 150, the GPS receiving module 50, the control display module 60, and the like. The secondary battery 130 is provided in a circular notch 721 formed in the center of the circuit holding plate 725.

Since the secondary battery 130 of the present embodiment needs to pass a current of 10 mA or more, particularly when receiving a satellite signal, a battery having a capacity of several tens of mAh is required. Therefore, the secondary battery 130 in the present embodiment uses a thin battery having a diameter as large as about 20 mm or 16 mm but a thickness of 2 mm or less. In this case, the secondary battery 130 and the flat antenna 40 can be arranged so as to be stacked in a plane. Therefore, it is advantageous for a model that needs to reduce the diameter of the electronic clock 1.

[Circuit configuration of electronic clock]
FIG. 7 is a block diagram showing a circuit configuration of the electronic clock 1. The electronic clock 1 includes a control display module 60, a GPS receiving module 50, a short-range wireless communication module 150, and a power supply module 70, each of which is arranged on a circuit board 720.

The GPS receiving module 50 is a satellite signal receiving unit that receives a position information satellite signal from a GPS satellite by a plane antenna 40. Further, the short-range wireless communication module 150 is a short-range wireless communication unit that performs short-range wireless communication by a short-range wireless communication antenna realized by the solar cell panel 80. Here, prior to the description of the circuit configuration of the GPS receiving module 500, the satellite signal to be processed by the GPS receiving module 50 will be described.

[Satellite signal navigation message]
In GPS, a navigation message is transmitted by a satellite signal. 8 to 10 are diagrams for explaining the structure of this navigation message. As shown in FIG. 8, the navigation message is configured as data in which a mainframe having a total number of bits of 1500 bits is one unit. The mainframe is divided into five 300-bit subframes sf1 to sf5. The data of one subframe is transmitted from each GPS satellite in 6 seconds. Therefore, the data of one mainframe is transmitted from each GPS satellite in 30 seconds.

Subframe sf1 contains satellite correction data including week number data and satellite health status. The week number data is information representing the week including the current GPS time information. The starting point of GPS time information is 00:00 on January 6, 1980 in UTC (Coordinated Universal Time), and the week starting on this day is week number 0. Week number data is updated on a weekly basis. The satellite health status is a code indicating whether or not the satellite has an abnormality, and by confirming this code, it is possible to control so that the signal of the satellite with the abnormality is not used.

Of the five sets of subframes, subframes sf1 to sf3 contain information unique to each satellite, so the same content is repeatedly transmitted each time. Specifically, the clock correction information of the transmitting satellite itself and Contains orbital information (ephemeris). On the other hand, the subframes sf4 and sf5 include orbit information (almanac) and ionospheric correction information of all satellites, and these are divided into page units 1 to 25 and accommodated in the subframe due to the large amount of data. Will be done. Since it takes 25 frames to send the contents of all pages, it takes 12 minutes and 30 seconds to receive all the information of the navigation message.

Further, the subframes sf1 to sf5 include, from the beginning, a TLM (Telemetry) word in which 30-bit TLM (Telemetry Word) data is stored and a HOW word in which 30-bit HOW (Hand Over Word) data is stored. It has been. Therefore, the TLM word and the HOW word are transmitted from the GPS satellite at intervals of 6 seconds, while the satellite correction data such as week number data, the ephemeris parameter, and the ephemeris parameter are transmitted at intervals of 30 seconds.

As shown in FIG. 9, the TLM word includes preamble data, TLM message, Reserved bit, and parity data.

As shown in FIG. 10, the HOW word includes GPS time information called TOW (Time of Week, also referred to as “Z count data”). The Z count data displays the elapsed time from 0 o'clock every Sunday in seconds, and returns to 0 at 0 o'clock on the following Sunday. That is, the Z count data is information in seconds shown every week from the beginning of the week. This Z count data indicates GPS time information in which the first bit of the next subframe data is transmitted. For example, the Z count data of the subframe sf1 indicates GPS time information in which the first bit of the subframe sf2 is transmitted. The HOW word also includes 3-bit data (ID code) indicating the ID of the subframe. That is, the HOW words of the subframes sf1 to sf5 shown in FIG. 8 include ID codes of "001", "010", "011", "100", and "101", respectively. For time reception, only the TOW of one satellite signal needs to be acquired, and the time information reception time is about 3 seconds in an environment with good conditions.

[GPS reception module]
In FIG. 7, the GPS receiving module 50 constitutes the GPS receiving unit 5 together with the planar antenna 40 and the SAW (Surface Acoustic Wave) filter 59. The SAW filter 59 is a bandpass filter that allows a satellite signal of 1.5 GHz to pass through. An LNA (low noise amplifier) that improves the reception sensitivity may be separately inserted between the flat antenna 40 and the SAW filter 59. Further, the SAW filter 59 may be incorporated in the GPS receiving module 50.

The GPS receiving module 50 processes the satellite signal that has passed through the SAW filter 59, and includes an RF (Radio Frequency) section 51, a baseband section 52, a crystal oscillator circuit (TCXO) 53 with a temperature compensation circuit, and a flash. It has a memory 54.

The RF section 51 includes a PLL (Phase Locked Loop) 511, a VCO (Voltage Controlled Oscillator) 512, an LNA (Low Noise Amplifier) 513, a mixer 514, an IF (Intermediate Frequency) amplifier 515, an IF filter 516, and an ADC (A / D conversion). (Vessel) 517 is provided.

The PLL 511 and VCO 512 generate a local oscillation signal having a frequency corresponding to the reception frequency from the clock generated by the TCXO53. The satellite signal that has passed through the SAW filter 59 is amplified by the LNA 513, mixed with the local oscillation signal from the VCO 512 by the mixer 514, and down-converted to the IF signal in the IF band. The IF signal output from the mixer 514 passes through the IF amplifier 515 and the IF filter 516, and is converted into a digital signal by the ADC (A / D converter) 517.

The baseband unit 52 includes a DSP (Digital Signal Processor) 521, a CPU (Central Processing Unit) 522, an RTC (real-time clock) 523, and an SRAM (Static Random Access Memory) 524. Further, a TCXO 53, a flash memory 54, and the like are also connected to the baseband portion 520.

Then, the baseband unit 52 can acquire satellite time information and positioning information by inputting a digital signal from the ADC 517 of the RF unit 51 and performing correlation processing, positioning calculation, and the like. The clock that is the basis of the local oscillation signal is supplied from the TCXO 53 to the PLL 511 via the baseband portion 52.

[Data in flash memory]
The flash memory 54 stores a time difference database or the like composed of local time information. In the present embodiment, the information in the flash memory 54 is acquired from a nearby mobile information terminal R by short-range wireless communication of Bluetooth LE (Low Energy) and stored in the flash memory 54. FIG. 11 is a diagram showing an example of the data structure of the local time information 230. In the local time information 230, the area information 231 which is the position information and the time difference information 232 are associated with each other. Therefore, when the position information is acquired in the positioning mode, the control circuit 300 can acquire the time difference information based on the position information (latitude, longitude).

The time difference information 232 is information for acquiring the time difference with respect to the UTC in each area stored as the area information 231. The time zone information 2321, the time zone change information 2322, the DST offset information 2323, and the DST start Information 2324, DST end information 2325, and DST change information 2326 are included.

The area information 231 is information indicating each area when the geographic information is divided into a plurality of areas. Each region is, for example, a rectangular region having a length of about 500 to a dozen km in each of the east-west and north-south directions. The geographic information is map information having a time zone. As the area information 231, coordinate data for specifying each area is stored. That is, in the case of a rectangular area, for example, the area can be specified by the upper left coordinates (longitude, latitude) and the lower right coordinates (longitude, latitude) of the area, so the coordinates of these two points are stored. ing.

The time zone information 2321 indicates the time zone for UTC in each region.
The time zone change information 2322 is information indicating the change schedule of the term zone, and indicates the date and time when the time zone is changed in each area and the time difference with respect to UTC after the time zone change. For example, as shown in FIG. 11, in the second region, it is shown that the time difference with respect to UTC is changed from +8 hours to +9 hours after 2:00 am on October 26, 2014.

The DST offset information 2323 indicates the offset value of daylight saving time (summer time) in each region. The DST start information 2324 indicates the start time of daylight saving time in each region, and the DST end information 2325 indicates the end time of daylight saving time in each region. The DST change information 2326 is information indicating the change schedule of the DST, and indicates the date and time when the daylight saving time setting in each area is changed, the offset value after the change, and the like. For example, as shown in FIG. 11, in the third region, the offset value of DST is set to +1 during the period from the last Sunday of March to the last Sunday of October, and the offset value of DST is set to 0 after 2015. There is.

FIG. 12 is a diagram showing an example of the change history of the time difference information. As shown in FIG. 12, when the time zone information which is the time difference information or the information related to daylight saving time is changed, new local time information is created in response to the change. Then, new version information is added to the created local time information. This version information is, for example, information for displaying a version of local time information in correspondence with a numerical value, a character, a symbol, or the like. In addition, local time information may be newly created every time the time zone or daylight saving time is changed, or when a predetermined period has passed or when there is a change related to a predetermined time zone, a predetermined time is specified. It may be newly created according to the agreement.

In this way, by appropriately updating the local time information according to changes in the time zone and daylight saving time, the time difference with respect to UTC can be acquired more accurately in each area.

In addition to the time difference database composed of the above local time information, the following information can be stored in the flash memory 54.
a. Satellite orbit data valid for up to 7 days By referring to this data, it is possible to extend the period for updating satellite orbit data longer than usual.
b. Satellite Health Data This data can be used to eliminate unusable satellites.
c. Receiver data when the GPS receiving module 50 was last started This data can be used to improve the positioning performance when the GPS receiving module 50 is restarted.
d. Ionospheric data This data is available for more accurate positioning.
The above data in the flash memory 54 can be updated by acquiring the latest data from the application of the mobile information terminal R via Bluetooth LE.

[Near field communication module]
The short-range wireless communication module 150 includes an RF (Radio Frequency) unit 1500, a baseband unit 1600, a Bluetooth LE controller unit 1700, and a crystal oscillator 1701 that generates a 16 MHz master clock.

In FIG. 7, the short-range wireless communication antenna 80A is a short-range wireless communication antenna realized by the back surface protective material 86 of the solar cell panel 80. The RF unit 1500 down-converts the short-range wireless communication signal received via the short-range wireless communication antenna 80A into an IF signal suitable for demodulation, and up-converts the IF signal modulated by the transmission information into a high-frequency signal. It is a circuit.

In the RF unit 1500, the LNA (Low Noise AmplIFier) 1511 performs high-frequency amplification of the short-range wireless communication signal received by the short-range wireless communication antenna 80A, and the BPF 1512 removes noise in an unnecessary band from the LNA 1511. .. The synthesizer composed of PLL1501 and VCO1502 supplies the mixer 1513 with a local oscillation signal having a frequency corresponding to the reception tuning frequency. The mixer 1513 down-converts the signal output via the BPF 1512 by mixing it with the local oscillation signal, and outputs an IF signal. The IF amplifier 1514 amplifies this IF signal, and the ADC (Analog Digital Converter) 1515 converts the IF signal output by the IF amplifier 1514 into a digital signal and supplies it to the baseband unit 1600.

Further, in the RF unit 1500, the DAC (Digital Analog Converter) 1521 converts the digital signal modulated by the transmission information (baseband signal) into an IF signal which is an analog signal, and the IF amplifier 1522 amplifies this IF signal. do. The mixer 1523 up-converts the intermediate frequency signal output by the IF amplifier 1522 by mixing it with a local oscillation signal generated by a synthesizer composed of PLL1501 and VCO1502, and up-converts the intermediate frequency signal in a band corresponding to the transmission tuning frequency. Is output. The BPF 1524 removes noise in an unnecessary band from the high frequency signal output by the mixer 1523. The PA (Power AmplIFier) 1525 amplifies the high frequency signal output by the BPF 1524 and radiates it from the short-range wireless communication antenna 80A.

The baseband unit 1600 has a demodulation unit 1610 and a modulation unit 1620. Here, the demodulation unit 1610 demodulates the received information (transmission information from the mobile information terminal which is the communication partner) from the digital IF signal output from the ADC 1515 of the RF unit 1500 and supplies it to the Bluetooth LE controller unit 1700. .. Further, the modulation unit 1620 modulates the carrier with the transmission information supplied from the Bluetooth LE controller unit 1700, generates an IF signal in a digital format, and supplies it to the DAC 1521 of the RF unit 1500.

The Bluetooth LE controller unit 1700 is a means for controlling communication by Bluetooth LE with the mobile information terminal R by controlling the RF unit 1500 and the baseband unit 1600.

[Control display module]
The control display module 60 includes a control unit (CPU) 61, a drive circuit 62 for driving pointers 21 to 25, 27, 29, and the like, and a crystal oscillator 63.

The control unit 61 includes an RTC (Real Time Clock) 66, a ROM 67, and a storage unit 68. The RTC 66 clocks internal time information using a reference signal output from the crystal oscillator 63. The RTC66 constitutes a time information generation unit. The ROM 67 stores various programs executed by the control unit 61.

The storage unit 68 stores satellite time information and positioning information output from the GPS receiving module 50 and time information output from the short-range wireless communication module 150.

The control unit 61 switches and activates the short-range wireless communication module 150 and the GPS receiving module 50 by outputting a control signal to the short-range wireless communication module 150 and the GPS receiving module 50. The frequency of the GPS satellite signal is as high as about 1.5 GHz, and the strength of the received signal is as weak as about 1/100. Therefore, the GPS satellite signal reception process by the GPS receiving module 50 requires a large amount of electric power. Therefore, the control unit 61 does not activate the short-range wireless communication module 150 and the GPS receiving module 50 at the same time, but switches and activates them.

The electronic clock 1 of the present embodiment includes the short-range wireless communication module 150, the GPS receiving module 50, and the control display module 60, so that the time information acquired by the short-range wireless communication or the time information received from the GPS satellite S is provided. The time display can be automatically modified based on.

[Power supply module]
The power supply module 70 includes a charge control circuit 71, a first regulator 72, a second regulator 73, and a voltage detection circuit 74.

When light is incident on the solar cell panel 80 and the solar cell panel 80 generates power, the charge control circuit 71 supplies the power obtained by the photopower generation to the secondary battery 130 to charge the secondary battery 130. The secondary battery 130 supplies drive power to the control display module 60 and the short-range wireless communication module 150 via the first regulator 72, and supplies drive power to the GPS receiving module 50 via the second regulator 73. In this way, the power supply means for supplying the driving power by the secondary battery 130 is configured.

The voltage detection circuit 74 monitors the output voltage of the secondary battery 130 and outputs it to the control unit 61. That is, the voltage detection circuit 74 functions as a battery remaining amount detecting unit for detecting the remaining battery level of the secondary battery 130 which is a power supply means. Since the battery voltage detected by the voltage detection circuit 74 is input to the control unit 61, the voltage of the secondary battery 130 can be grasped and the reception process can be controlled.

Further, the charge control circuit 71 can be controlled so that the voltage of the solar cell panel 80 is detected by the voltage detection circuit 74 in a state where the solar cell panel 80 and the secondary battery 130 are disconnected by the control from the control unit 61. .. In this case, the voltage detection circuit 74 can detect the power generation voltage (power generation amount) of the solar cell panel 80 without being affected by the voltage of the secondary battery 130. Therefore, the voltage detection circuit 74 constitutes a power generation amount detection unit that detects the power generation amount of the solar cell panel 80, and this power generation amount is input to the control unit 61. Therefore, the control unit 61 can determine whether or not the electronic clock 1 is arranged outdoors based on the amount of power generated by the solar cell panel 80.

[Control unit configuration]
FIG. 11 is a block diagram showing a functional configuration of the control unit 61. In FIG. 11, the time information correction unit 610, the display control unit 620, the voltage detection control unit 630, and the reception control unit 640 are functions realized by the control unit 61, which is a CPU, executing a program stored in the ROM 67. be.

[Time information correction section]
The time information correction unit 610 activates the GPS receiving module 50 to receive a satellite signal, acquires time information from the received satellite signal, and corrects the internal time information.

[Display control unit]
In the normal mode, the display control unit 620 controls the drive circuit 62 based on the internal time information, displays the local time (hours, minutes, seconds) with the pointers 21 to 23, and homes with the pointers 24 and 25. Displays the time (hours, minutes) of the time. Further, the display control unit 620 controls the display of the pointer 27 according to the remaining battery level, the reception control state, and the like.

[Voltage detection control unit]
The voltage detection control unit 630 detects the voltage of the secondary battery 130, that is, the remaining battery level, and the amount of power generated by the solar cell panel 80 by the voltage detection circuit 74. The voltage detection control unit 630 detects the voltage by the voltage detection circuit 74 at regular time intervals. The voltage detection control unit 630 also controls the operation of the charge control circuit 71.

[Reception control unit]
The reception control unit 640 includes a reception mode selection unit 641, a satellite signal reception control unit 642, a short-range wireless communication control unit 643, and a reception determination unit 644.

[Reception mode selection section]
The reception mode selection unit 641 detects a predetermined operation by the external operation member (buttons 361 to 363, crown 38) and executes selection of various reception processes. Specifically, when the reception mode selection unit 641 performs the time measurement reception operation by the external operation member, the reception mode selection unit 6421 activates the time measurement reception control unit 6421 described later, and the positioning reception operation is performed by the external operation member. In this case, the positioning reception control unit 6422, which will be described later, is activated. Further, the reception mode selection unit 641 activates the short-range wireless communication control unit 643, which will be described later, when the short-range wireless communication operation is performed by the external operation member. Specific time measurement reception operation, positioning reception operation, and short-range wireless communication operation may be set according to the number and type of external operation members provided in the electronic clock 1.

[Satellite signal reception control unit]
The satellite signal reception control unit 642 includes a time measurement reception control unit 6421 and a positioning reception control unit 6422.

The time measurement reception control unit 6421 activates the GPS reception module 50 to receive at least one satellite signal, acquires time information from the received satellite signal, and executes a time measurement reception process for correcting the internal time information. ..

The positioning reception control unit 6422 activates the GPS receiving module 50, receives satellite signals from a plurality of GPS satellites, performs positioning based on the received plurality of satellite signals, and uses the time information obtained based on the positioning results. Based on this, the positioning reception process that corrects the internal time information is executed.

[Near field communication control unit]
The short-range wireless communication control unit 643 activates the short-range wireless communication module 150 to perform short-range wireless communication with a mobile information terminal such as a smartphone near the electronic clock 1 by Bluetooth LE, and the time is set by this short-range wireless communication. Get the information and modify the internal time information.

[Reception judgment unit]
The reception determination unit 644 has a function of determining whether or not the reception of the time information and the correction of the internal time information are successful. For example, at the time of time measurement reception processing, the satellite signal reception control unit 642 compares the time information (Z count) acquired from the received satellite signal with the time data of the RTC66. If these differences are large, obtain the Z count of the next subframe to compare the Z counts of the two to prevent erroneous correction, or if there are multiple captured satellites, each Z obtained from multiple satellites. It is determined whether the acquired time data is consistent by comparing the counts. In the time measurement reception process, when it is determined that the time data is consistent, the time is corrected. Similarly, in the positioning reception process and the process by the short-range wireless communication control unit 643, the matching determination of the time data is performed, and when the matching is achieved, the time is corrected.

[Operation of this embodiment]
Next, the operation of this embodiment will be described with reference to FIGS. 14 to 17.

[Overall control by control unit]
In the present embodiment, the voltage detection circuit 74 is started at regular intervals, for example, at intervals of 60 seconds under the control of the voltage detection control unit 630, and detects the battery voltage of the secondary battery 130. Then, the control unit 61 compares the remaining battery level (storage amount) of the secondary battery 130 detected via the voltage detection circuit 74 with a predetermined value.

In the present embodiment, the control unit 61 executes the process shown in FIG. 14 at predetermined time intervals. First, the voltage detection control unit 630 of the control unit 61 determines whether the battery voltage (storage amount) of the secondary battery 130 finally detected by the voltage detection circuit 74 is equal to or higher than a preset predetermined value (step). S101).

Here, the voltage detection control unit 630 sets a voltage as a predetermined value to be compared with the battery voltage of the secondary battery 130 so that the control unit 61 does not go down even if the GPS satellite signal reception process is performed. The predetermined value is usually set to a voltage at which the control unit 61 does not go down even if the positioning reception process is performed. For example, the predetermined value is 3.6V, and this value may be set based on the discharge characteristics of the secondary battery 130.

When the battery voltage is equal to or higher than the predetermined value and the determination result in step S101 is "Yes", the reception mode selection unit 641 of the control unit 61 determines whether or not the predetermined operation C (for example, the operation of the button 363) has been performed. Determine (step S1011). When this determination result is "Yes", the reception mode selection unit 641 activates the positioning reception control unit 6422 (step S1012). As a result, the positioning reception process shown in FIG. 17 is executed.

If the battery voltage is equal to or higher than the predetermined value and the predetermined operation C is not performed, the determination result in step S1011 becomes "No" and the process proceeds to step S102. Further, even when the battery voltage is less than a predetermined value and the determination result in step S101 is "NO", the process proceeds from step S101 to step S102.

Next, when the process proceeds to step S102, the reception mode selection unit 641 of the control unit 61 determines whether or not the automatic reception condition is satisfied. Here, the automatic reception condition is, for example, the arrival of the time when the side time reception is automatically performed at a fixed time every day, or the case where the electronic clock 1 goes outdoors and the solar cell panel 80 starts power generation. , It is a condition for automatic reception. When the determination result in step S102 is "Yes", the reception mode selection unit 641 activates the time measurement reception control unit 6421 (step S1021). As a result, the timed reception process shown in FIG. 16 is executed.

When the automatic reception condition is not satisfied and the determination result in step S102 is "No", the reception mode selection unit 641 determines whether or not the predetermined operation A (for example, the operation of the button 361) has been performed (for example, the operation of the button 361). Step S103). Even when the determination result is “Yes”, the reception mode selection unit 641 activates the time measurement reception control unit 6421 (step S1021).

When the automatic reception condition is not satisfied, the predetermined operation A is not performed, and the determination result in step 103 is "No", the reception mode selection unit 641 performs the predetermined operation B (for example, the operation of the button 362). It is determined whether or not it is (step S104). When this determination result is "Yes", the reception mode selection unit 641 activates the short-range wireless communication control unit 643 (step S1041). As a result, the short-range wireless communication process shown in FIG. 15 is executed. As a typical example in which short-range wireless communication processing is executed in this way, it is necessary to acquire time information in a situation where it is difficult to receive GPS satellite signals, such as when a user wearing an electronic watch 1 is located indoors. There are cases.

If the automatic reception condition is not satisfied, the predetermined operation A is not performed, and the predetermined operation B is not performed, the determination result in step S104 is "No". In this case, the control unit 61 continues the normal hand movement (step S1090).
The control unit 61 repeatedly executes the above processing at predetermined time intervals.

[Near field communication processing]
When the short-range wireless communication process shown in FIG. 15 is activated, the display control unit 620 instructs the guideline 27 that the short-range wireless communication is in progress (step S201). Next, the short-range wireless communication control unit 643 starts a process of establishing a Bluetooth LE link with the neighboring mobile information terminal R by the short-range wireless communication module 150 (step S202). Next, the short-range wireless communication control unit 643 determines whether or not the Bluetooth LE link has been established (step S211). When this determination result is "No", the short-range wireless communication control unit 643 determines whether or not a predetermined timeout time has elapsed (step S240). If the determination result is "No", the short-range wireless communication control unit 643 repeats the determination in step S211.

If the timeout time elapses without establishing the Bluetooth LE link, the determination result in step S240 becomes “Yes”. In this case, the short-range wireless communication control unit 643 ends the communication (step S231). As a result, the control unit 61 returns the hand movement to the normal hand movement (step S232). Then, the process of the control unit 61 returns to step S101 of FIG.

If the Bluetooth LE link is established before the timeout time elapses, the determination result in step S211 becomes "Yes", and the short-range wireless communication control unit 643 uses the short-range wireless communication module 150 to set the time from the nearby mobile information terminal R. Acquire data (step S212). Next, the reception determination unit 644 determines whether or not the time data acquired from the mobile information terminal R is consistent (step S213). Specifically, the reception determination unit 644 compares the acquired time data with the time data of the RTC 66 of the control unit 61, and confirms whether the difference is within a predetermined value or not.

If the determination result in step S213 is "No", the short-range wireless communication control unit 643 ends the communication (step S231). As a result, the control unit 61 returns the hand movement to the normal hand movement (step S232). Then, the process of the control unit 61 returns to step S101 of FIG.

On the other hand, when the determination result in step S213 is "Yes", the time information correction unit 610 corrects the time data of the RTC 66 of the control unit 61 based on the time data acquired from the mobile information terminal R (step S214).

Next, the short-range wireless communication control unit 643 determines whether or not the data update instruction has been received from the mobile information terminal R (step S221). In the present embodiment, when the user wishes to rewrite the built-in data of the flash memory 54 of the electronic clock 1, the user activates the data rewriting application program installed on the mobile information terminal R and starts the electronic clock from the mobile information terminal R. 1 is made to send a data update instruction, and the mobile information terminal R is made to send data such as local time information downloaded in advance to the electronic watch 1. In step S221, it is determined whether or not the data update instruction from the mobile information terminal R has been received. When the determination result in step S221 is "No", the reception determination unit 644 determines whether or not the communication end instruction has been received from the mobile information terminal R (step S224). If the determination result in step S224 is "No", the reception determination unit 644 repeats the determination in step S221.

When the data update instruction is received from the mobile information terminal R and the determination result in step S221 is "Yes", the short-range wireless communication control unit 643 uses the short-range wireless communication module 150 to send the local time information or the like from the mobile information terminal R. The data is received (step S222), and the data in the flash memory 54 of the GPS receiving module 50 is rewritten by the received data (step S223). Then, the reception determination unit 644 determines whether or not the communication end instruction has been received from the mobile information terminal R (step S224).

Then, when the communication end instruction is received from the mobile information terminal R, the determination result in step S224 is "Yes". As a result, the control unit 61 returns the hand movement to the normal hand movement (step S232). Then, the process of the control unit 61 returns to step S101 of FIG. The peak current at the time of executing the short-range wireless communication processing is 5 mA, which is about the same as the peak current of the side-time reception processing. However, since the short-range wireless communication processing has a higher communication speed than the time-measurement reception processing, the communication time may be several tens of msec, and the function of acquiring the local time consumes less power than the side-time reception processing. Further, in the short-range wireless communication processing, in addition to the time information, the time zone information, the summer time information can be updated, and the assist data can be acquired by using the application of the mobile information terminal R.

[Timed reception processing]
Next, the timed reception process shown in FIG. 16 will be described. The time measurement reception processing is executed by the time measurement reception control unit 6421 of the control unit 61 controlling the GPS receiving module 50. When the time measurement reception control unit 6421 starts the time measurement reception process, first, the pointer 27 indicates "1" to indicate that the time measurement reception mode is in effect, and the GPS reception module 50 is activated to receive the time. Is started (step S301).

Next, the time measurement reception control unit 6421 starts the satellite search by the GPS reception module 50 (step S302). Then, the time measurement reception control unit 6421 determines whether or not the GPS reception module 50 has been able to capture the satellite (step S311). When this determination result is "No", the time measurement reception control unit 6421 determines whether or not the elapsed time from the start of measurement reception has reached a predetermined timeout time for satellite acquisition (for example, 15 seconds). (Step S351).

When the determination result in step S351 becomes "Yes" due to the time-out, the timed reception control unit 6421 ends the reception by the GPS receiving module 50 (step S342). As a result, the control unit 61 returns the pointer 24 to the normal hand movement as a battery remaining amount display (step S334). The frequency of the GPS satellite signal is as high as about 1.5 GHz and is not affected by motor noise. Therefore, in the present embodiment, the hand movements of the pointers 21 to 23 are continued even during the reception of the satellite signal. However, the hand movement may be stopped.

On the other hand, when the time-out has not occurred when proceeding from step S311 to step S351 and the determination result in step S351 is "No", the time measurement reception control unit 6421 performs satellite search processing by the GPS reception module 50 ( Step S302) is continued.

When it was confirmed that the satellite could be captured when proceeding from step S302 to step S311 and the judgment result of step S311 was "Yes", the GPS reception module 50 was able to capture the GPS reception module 6421. The satellite data related to the GPS satellite S is stored in the flash memory 54 (step S312).

In the flash memory 54, satellite data captured at the time of past reception is stored together with information indicating a reception time zone. Then, when the GPS receiving module 50 captures the GPS satellite S in the same time zone (for example, in 1-hour units) as the time zone of the satellite data stored in the flash memory 54, the time measurement reception control unit 6421 performs the time measurement reception control unit 6421 in step S312. The newly acquired satellite data updates the satellite data in the flash memory 54 at the same time zone.

The satellite data stored in the flash memory 54 is used during the satellite search in step S302. That is, in general, a position information satellite (for example, a GPS satellite) orbits the earth in about 12 hours, and the earth also rotates. Therefore, at the same place and at the same time (for example, 24 hours later). If the position information satellite is searched, there is a high possibility that the same position information satellite as the position information satellite acquired in the past (for example, the previous time) can be acquired. Therefore, if there is satellite data captured in the same time zone in the flash memory 54 during the satellite search in step S302, the probability that the GPS satellite S can be captured in a short time can be obtained by giving priority to the search of that satellite. improves. Therefore, the timed reception control unit 6421 refers to the satellite data stored in the flash memory 54 at the time of the satellite search in step S302, and if the satellite data in the same time zone is stored, the search for that satellite is prioritized. If the satellite data is not stored, the GPS satellite S is searched in a predetermined order.

When the storage of the satellite data in the flash memory 54 (step S312) is completed, the time measurement reception control unit 6421 determines whether or not the time data (Z count) can be acquired from the satellite captured by the GPS reception module 50 (step S312). Step S321). If a plurality of satellites can be captured, the time data may be acquired from the satellite signal having a high signal strength (SNR), or the time data may be acquired from each of the plurality of satellites to ensure the consistency of the time data. May be confirmed to determine the success of time data acquisition.

When the determination result in step S321 is "No", the time measurement reception control unit 6421 reaches a predetermined timeout time (for example, 60 seconds) from the time when the process proceeds from step S312 to step S321. It is determined whether or not it has been done (step S341). When the determination result in step S341 is "No", the time measurement reception control unit 6421 repeats the process in step S321.

Since the Z count can be received at intervals of 6 seconds in the GPS satellite signal, if the timeout time in step S341 is 60 seconds, the Z count can be received up to 10 times before the timeout occurs.

When the elapsed time becomes equal to or longer than the timeout time and the determination result in step S343 becomes "Yes", the GPS receiving module 50 ends the reception process (step S342). This returns to normal hand movement (step 334).

On the other hand, when the process proceeds to step S321, if the time data can be acquired at that time, the determination result in step S321 becomes "Yes", and the time measurement reception control unit 6421 receives the acquired time data (Z count). Check the consistency (step S322). Specifically, when the timed reception control unit 6421 acquires the first Z count, it compares the Z count with the time data of the RTC 66 of the control unit 61, and whether or not the difference is within a predetermined value. (Step S322). In step S322, if the difference between the compared times is too large (for example, if there is a difference of 5 seconds or more), it is determined that the matching is not achieved.

Then, in step S322, when it is determined that the data consistency is not obtained (when it is determined as "No"), the time measurement reception control unit 6421 repeats the processes of steps S341, S321, and S322. Therefore, if the acquired Z count does not match the internal time, the time measurement reception control unit 6421 will acquire the Z count of the subframe after the next 6 seconds.

On the other hand, when the time measurement reception control unit 6421 acquires a plurality of Z counts and the plurality of Z counts are matched with each other, that is, when the data is at intervals of 6 seconds, the acquired Z counts ( It is determined that the time data) is consistent (“Yes}” in step S322).

When the time measurement reception control unit 6421 determines “Yes” in step S322, the time measurement reception control unit 6421 ends reception (step S331). Next, the time information correction unit 610 corrects the time information based on the acquired time data (Z count) (step S332). When the time information correction unit 610 corrects the time information, the display control unit 620 corrects the display of the pointers 21 to 23 via the drive circuit 62 based on the corrected time information, and the pointer 24 also displays the remaining battery level. Return and return to normal hand movement (step S334).

With the above, the time measurement reception process is completed. When the time measurement reception process is completed, the control unit 61 returns to step S101 of FIG. 14 to continue the process. In the time measurement reception process, time information can be acquired in a reception time of about 5 to 15 seconds, and only one satellite needs to be captured, which saves power and is excellent in reception sensitivity. ..

[Positioning reception processing]
Next, the positioning reception process will be described with reference to FIG.
When the positioning reception process is started, the display control unit 620 instructs the guideline 27 that the positioning reception is in progress (step S501). That is, the display control unit 620 indicates the symbol “4+” displayed on the second sub dial 13 with the pointer 27 during the positioning reception process. Further, the positioning reception control unit 6422 outputs a control signal to the GPS reception module 50 and starts the positioning reception process (above, step S501).

When the start of positioning reception is instructed, the positioning reception control unit 6422 performs satellite search processing by the GPS receiving module 50 (step S511). In this satellite search process, when the reception level of the satellite signal in the GPS reception module 50 is equal to or higher than a preset predetermined level, the positioning reception control unit 6422 determines that the GPS satellite S has been captured. Then, the positioning reception control unit 6422 determines whether or not the GPS receiving module 50 has captured a predetermined number (at least 3, usually 4) or more satellite signals required for positioning (step S512).

When the determination result in step S512 is "No", the positioning reception control unit 6422 determines whether the timeout time for the satellite search process has elapsed (step S561). The timeout time for this satellite search process is, for example, 15 seconds.

If the determination results in steps S512 and S561 are both "No", the positioning reception control unit 6422 continues the satellite search process in step S511.

Then, when the timeout time elapses and the determination result in step S561 becomes "Yes", the positioning reception control unit 6422 ends the positioning reception process (step S552), and the control unit 61 returns to the normal hand movement (step S540). .. In this case, it is considered that the electronic clock 1 is arranged in an environment in which the GPS satellite S cannot be captured, and it is necessary to continue the reception process and avoid consuming the power of the secondary battery 130.

When the satellite acquisition by the GPS receiving module 50 succeeds and the determination result in step S512 becomes "Yes", the positioning reception control unit 6422 determines whether the satellite orbit data (ephemeris) can be acquired from the acquired satellite signal (step). S521).

When the determination result in step S521 becomes “Yes”, the positioning reception control unit 6422 performs the positioning calculation based on the acquired satellite orbit data, and determines whether the positioning calculation is completed (step S522).

The positioning reception control unit 6422 is for positioning calculation when the determination result in step S521 is "No" or when the determination result in step S521 is "Yes" and the determination result in step S522 is "No". It is determined whether the time-out time of (step S551) has elapsed (step S551). The timeout time for this positioning calculation is, for example, 120 seconds.

When the timeout time for positioning calculation elapses and the determination result in step S551 becomes "Yes", the positioning reception control unit 6422 ends the reception process by the GPS receiving module 50 (step S552). As a result, the control unit 61 returns to the normal hand movement process (step S540).

On the other hand, if the timeout time for positioning calculation has not elapsed and the determination result in step S551 is "No", the positioning reception control unit 6422 returns to step S521 and continues the process.

When the satellite orbit data is acquired and the positioning calculation is completed before the timeout time for the positioning calculation elapses, the determination result in step S522 becomes “Yes”, and the positioning reception control unit 6422 receives the reception process by the GPS reception module 50. (Step S531). Then, the positioning reception control unit 6422 reads the time difference information corresponding to the positioning information calculated by the positioning calculation from the time difference database stored in the flash memory 54, and outputs the time difference information to the control unit 61 (step S532).

The time information correction unit 610 of the control unit 61 corrects the time information using this time difference information, and the display control unit 620 displays the corrected time with the pointers 21 to 23 (step S533). After that, the control unit 61 performs a normal hand movement process (step S540).

In this way, the positioning reception process is completed. When the positioning reception process is completed, the control unit 61 returns to step S101 of FIG. 14 to continue the process. The positioning reception process requires a reception time of about 30 seconds and requires the most energy. Therefore, as described above, the positioning reception process is executed only when the battery level is high. Since this positioning reception process does not require short-range wireless communication with the mobile information terminal R, it can be executed even in an environment where the mobile information terminal R cannot be used, such as on the sea or mountain where the radio wave of the mobile phone does not reach.
The above is the operation of this embodiment.

[Action and effect of the first embodiment]
According to the present embodiment, the thickness center of the short-range wireless communication antenna 80A (stainless plate of the solar cell panel 80) is located closer to the dial 11 side than the thickness center of the flat antenna 40, so that the short-range wireless communication can be performed. Communication performance will be improved, and both satellite signal reception and short-range wireless communication will be able to be performed appropriately in the electronic clock. Further, according to the present embodiment, since the planar antenna 40 is provided in the region avoiding the motor that drives the pointer in the plan view, the movement 2 including the motor and the planar antenna 40 is thinned, and the electronic clock 1 is miniaturized. be able to. Further, according to the present embodiment, since the notch 810 is formed in the region of the solar cell panel 80 that overlaps with the plane antenna 40 in a plane, the influence of the solar cell panel 80 on the reception operation of the plane antenna 40 is reduced and weakened. Position information satellite signals can be received by the planar antenna 40. Further, according to the present embodiment, since the first anti-magnetic plate 91 is provided in the region that does not overlap with the flat antenna 40 in the plan view, the influence of the first anti-magnetic plate 91 on the reception operation of the flat antenna 40 is reduced. The weak position information satellite signal can be received by the plane antenna 40. Further, according to the present embodiment, since the short-range wireless communication module 150 and the GPS receiving module 50 are arranged on both sides of the plane including the normal of the dial 11 and the center of the flat antenna 40, both modules are sufficiently provided. It can be separated to prevent the operation of both modules from interfering with each other.

<Second Embodiment>
FIG. 18 is a cross-sectional view of the electronic clock 1A according to the second embodiment of the present invention cut by a plane passing through the 12 o'clock position and the 6 o'clock position, and FIG. 19 shows the electronic clock 1A at the 12 o'clock position and the clock center (specifically). It is a cross-sectional view cut by a plane passing through the pointer axis 11x) and a plane passing through the center of the clock and the 4 o'clock position. Further, FIG. 20 is an exploded perspective view of the movement 2A of the electronic timepiece 1A. In these figures, common reference numerals are used for the parts corresponding to the parts shown in the first embodiment, and the description thereof will be omitted.

In the first embodiment, one circuit board 720 is used, but in this embodiment, as shown in FIGS. 18 to 20, two circuit boards 720B and 720G are used. Here, the circuit boards 720B and 720G are sandwiched between the main plate 125 and the circuit holding plate 725', and the circuit board 720B is located closer to the dial 11 than the circuit board 720G. The short-range wireless communication module 150 and the short-range wireless communication antenna 160 are arranged on the surface of the circuit board 720B on the dial 11 side. Here, the short-range wireless communication antenna 160 is a chip antenna having a built-in coil. In the first embodiment, the solar cell panel 80 is used as an antenna for short-range wireless communication, but in this embodiment, the short-range wireless communication antenna 160 is used instead. A GPS receiving module 50 and a flat antenna 40 for GPS reception are arranged on the surface of the circuit board 720G on the dial 11 side.

The circuit board 720B is provided with a notch 721B having a size and shape capable of accommodating the planar antenna 40 arranged on the circuit board 720G below the circuit board 720B. The planar antenna 40 is housed in the notch 721B. As a result, the circuit board 720G can be brought closer to the circuit board 720B, and the movement 2A can be made thinner.

The circuit board 720G is provided with a circular notch 721G having a size and shape capable of accommodating the secondary battery 130 placed in an area about half from the center of the circuit holding plate 725'on the lower side thereof. .. The secondary battery 130 is housed in the notch 721G. As a result, the circuit holding plate 725'can be brought closer to the circuit board 720G, and the movement 2A can be made thinner.

FIG. 21 is a plan view of the movement 2A of the electronic clock 1A. Five motors are provided on the main plate 125. The step motor 1401 is a motor for driving the second hand, and is arranged between the first sub dial 12 and the second sub dial 13. The step motor 1402 is a motor for driving the minute hand, and is arranged at a position in the direction of approximately 10 o'clock with respect to the pointer shaft 11x in a plan view. The step motor 1403 is a motor for driving the hour hand, and is arranged at a position in the direction of approximately 2 o'clock with respect to the pointer shaft 11x in a plan view. The step motor 1404 is a motor for driving a calendar car, and is arranged at a position in the direction of approximately 5 o'clock with respect to the pointer shaft 11x in a plan view. The step motor 1405 is a pointer drive motor for dual time display, and is arranged at a position in the direction of approximately 6 o'clock with respect to the pointer shaft 11x in a plan view.

As shown in FIG. 21, the step motors 141 to 145 overlap each other with the planar antenna 40 and the short-range wireless communication antenna 160 at positions that do not overlap each other in the outer case 30, that is, in the plan view of the movement 2. It is placed in a position where it does not become. Further, the first anti-magnetic plate 91 occupies an area that overlaps with each of the step motors 141 to 145 and does not overlap with the flat antenna 40 and the short-range wireless communication antenna 160. The reason why the first anti-magnetic plate 91 overlaps with the step motors 141 to 145 is to shield the external magnetic field and prevent the step motor from malfunctioning. Further, the reason why the first anti-magnetic plate 91 does not overlap with the flat antenna 40 and the short-range wireless communication antenna 160 is to prevent the communication using each antenna from being hindered.

The secondary battery 130 is a lithium ion battery. At the time of GPS reception, it is necessary to pass a current of 10 mA or more by this secondary battery 130. Therefore, a secondary battery 130 having a capacity of several tens of mAh is required. Therefore, in the present embodiment, the secondary battery 130 having a diameter of about 9 mm and a thickness of about 4 mm is used. Since the secondary battery 130 has a small diameter, it is advantageous for reducing the movement diameter.

The calendar window 15 is located at 4 o'clock on the dial 11. In the solar cell panel 80, an area overlapping the calendar window 15 is hollowed out in a plan view. The short-range wireless communication antenna 160 is arranged at a position overlapping the calendar window 15. Therefore, in the present embodiment, the radio waves of short-range wireless communication can pass through the hollowed-out area of the calendar window 15 and the solar cell panel 80, and the short-range wireless communication performance is ensured.

In the present embodiment, since the calendar window 15 serves as a passage path for radio waves for short-range wireless communication, it is preferable to increase the opening area of the calendar window 15 in order to ensure the performance of short-range wireless communication.

22 (a) to 22 (c) are plan views showing an example of a calendar window in the present embodiment. The calendar window 15 shown in FIG. 22A has a size capable of displaying a number indicating the date, a city name displaying the time, and characters indicating the city names before and after the city on the meridian line. .. In the example shown in FIG. 22B, the size is such that the characters indicating the day of the week can be displayed together with the numbers indicating the date. In the example shown in FIG. 22 (c), the calendar window 15 is used for a message notification function such as a display indicating that Bluetooth communication is being executed (display of the character "BT") and a display indicating that an e-mail has been received. ing. In addition to this, the calendar window 15 may be used to display the incoming call notification.

When the opening area of the calendar window 15 is increased in this way, radio waves can easily pass through, so that the quality of short-range wireless communication is improved. Furthermore, the user interface is improved because the display is easier to see.

FIG. 23 is a perspective view showing the circuit board 720B. In order to reduce the thickness of the movement 2A, holes 2401, cutouts 2402, and holes 2403 to 2405 for accommodating the motor coil portions of the step motors 1401 to 1405 shown in FIG. 21 are provided in the circuit board 720B. Further, in the circuit board 720B, a notch portion 721B is provided at a portion overlapping the flat antenna 40. Therefore, the circuit board 720B, which is the first circuit board, and the planar antenna 40 overlap in the side view perpendicular to the normal direction of the dial 11, and the circuit board 720B and the circuit board 720B are viewed in the plan view from the normal direction of the dial 11. It does not overlap with the plane antenna 40.

The circuit board 720B includes a control display module 60 (more accurately, a module obtained by removing the crystal oscillator 63 from the control display module 60), a crystal oscillator 63, and a power supply module 70 (more accurately, the power supply module 70 to the first regulator). Modules excluding 72 and the second regulator 73), short-range wireless communication module 150 and short-range wireless communication antenna 160 are arranged. The short-range wireless communication antenna 160 includes a chip antenna having a built-in coil and a circuit wiring pattern. In the present embodiment, by arranging the short-range wireless communication antenna 160 on the circuit board 720B above the movement 2A, it is possible to improve the antenna performance of the short-range wireless communication even if it is housed in the metal case. The chip of the short-range wireless communication antenna 160 is preferably arranged near the outer peripheral edge of the circuit board 720B. Further, in the circuit board 720B, it is preferable not to arrange the GND pattern or other parts in the area within 5 mm from the chip of the short-range wireless communication antenna 160 except for the antenna wiring leading to the chip of the short-range wireless communication antenna 160. ..

FIG. 24 is a perspective view showing the circuit board 720G. The circuit board 720G is provided with a circular notch 721G for accommodating the secondary battery 130. In the present embodiment, the secondary battery 130 can be separated from the flat antenna 40 by using a small battery having a diameter of 16 mm or 9 mm (thicker than the first embodiment), which is advantageous for a thin watch model. be.

The circuit board 720G includes a flat antenna 40, a GPS receiving module 50 (to be exact, a module excluding the TCXO53 and the flash memory 54 from the GPS receiving module 50), a TCXO53, a flash memory 54, a first regulator 72, and a second regulator 73. Have been placed. Since the first regulator 72 and the second regulator 73 generate switching noise, it is desirable to arrange the first regulator 72 and the second regulator 73 as far as possible from the short-range wireless communication antenna 160 and the planar antenna 40. Further, the circuit board 720G is provided with a connector 99 at the 3 o'clock position, and the circuit board 720G is electrically connected to the circuit board 720B via the connector 99.

In the flat antenna 40, the power feeding unit electrically separated from the GND electrode 43 and electrically connected to the GPS receiving module 50 is inside the side farthest from the metal case among the four sides surrounding the GND electrode 43 on the bottom surface. 42Q is provided. The feeding portion 42Q faces the antenna electrode 42 on the upper surface of the flat antenna 40. In the present embodiment, the GPS receiving module 50 is electrically connected to the antenna electrode 42 via an electromagnetic coupling between the feeding unit 42Q and the antenna electrode 42. Since the feeding pin is not used in the electromagnetic coupling, the thickness of the movement 2A can be reduced. Further, since the flat antenna 40 can be surface-mounted on the circuit board 720G by reflow, the mounting cost is low. In the flat antenna 40, providing the feeding portion 42Q on the side farthest from the metal case can reduce the influence of the metal case most and secure a larger antenna gain. Further, since the feeding portion 42Q is provided in the center of the circuit board 720G which plays the role of GND, the radiation pattern becomes point symmetric and the circularly polarized wave characteristics are improved. Further, the circuit board 720G which plays the role of GND has a notch portion 721G, in which the secondary battery 130 is housed, and the secondary battery 130 plays the role of GND. Therefore, the performance of the flat antenna 40 is not reduced, and it is convenient to arrange the power feeding unit 42Q in the vicinity of the secondary battery 130.

FIG. 19 shows a broken line 40x passing through the thickness center of the flat antenna 40 in the normal direction of the dial 11 and a broken line 160x passing through the thickness center of the short-range wireless communication antenna 160. As shown in FIG. 19, in the present embodiment as well, the thickness center of the short-range wireless communication antenna 160 is closer to the dial 11 side than the thickness center of the flat antenna 40, as in the first embodiment. Therefore, also in the present embodiment, as in the first embodiment, both the reception of the position information satellite signal and the short-range wireless communication can be appropriately performed.

One of the features of this embodiment is the planar layout of the GPS receiving module 50, the planar antenna 40, the short-range wireless communication module 150, and the short-range wireless communication antenna 160. In FIGS. 23 and 24, the straight line 720Y indicates a straight line in which the plane including the normal passing through the center of the dial 11 and the center of the flat antenna 40 intersects the circuit board 720B or 720G. Further, the straight line 720Y is a plane including a normal passing through the center of the dial 11, and indicates a straight line in which a plane orthogonal to the plane including the straight line 720Y intersects the circuit board 720B or 720G. In the present embodiment, a plane including a normal passing through the center of the dial 11 and the center of the flat antenna 40 is located between the GPS receiving module 50 and the short-range wireless communication module 150. This is because the GPS receiving module 50 and the short-range wireless communication module 150 are arranged at positions separated from each other to prevent interference between them. Further, in the present embodiment, the short-range radio communication antenna 160 is on both sides of the straight line 720X, that is, on both sides of the plane including the normal line passing through the center of the dial 11 and orthogonal to the plane including the straight line 720Y. And the plane antenna 40 are arranged, and both antennas are separated from each other to prevent mutual interference between the two antennas.
The above is the details of this embodiment.

Also in this embodiment, the same effect as that of the first embodiment can be obtained. Further, according to the present embodiment, since two circuit boards 720B and 720G are used, it is possible to arrange a circuit more complicated than that of the first embodiment, and the electronic clock can be made multifunctional. Can be done.

<Other embodiments>
Although the first and second embodiments of the present invention have been described above, other embodiments can be considered in the present invention. For example:

(1) In each of the above embodiments, the electronic clock receives GPS satellite signals in order to obtain time information. However, the electronic clock may receive other signals in order to obtain time information. For example, in order to obtain time information, signals of Galileo, Glonass, SBAS (Satellite-Based Augmentation System), and quasi-zenith satellite (MICHIBIKI) may be used in addition to GPS. These signals are collectively called GNSS (Compass Navigation Satellite System).

(2) In each of the above embodiments, the Bluetooth notification function needs to periodically communicate with and synchronize with the mobile information terminal, which consumes energy. Therefore, in the electronic clock, the Bluetooth notification function may be used only for communication of time data. According to this aspect, since the communication frequency by Bluetooth is reduced, the energy consumption of the electronic watch can be significantly reduced.

(3) In each of the above embodiments, the notch 810 is provided in the region of the solar cell panel 800 that overlaps with the plane antenna 40 in the plan view (see FIG. 4), but instead of providing such a notch, FIG. 25 And the solar cell panel 80B shown in FIG. 26 may be used. FIG. 25 is a plan view of the solar cell panel 80B, and FIG. 26 is a cross-sectional view of the solar cell panel 80B. In this aspect, in the solar cell panel 80B, only the front surface electrode 82 and the back surface electrode 84 of the plane antenna region 810A overlapping the plane antenna 40 are removed. Further, in the solar cell panel 80B, a back surface protective material 86a made of resin is used instead of the back surface protective material 86 made of stainless steel. According to this aspect, the back surface protective material 86a made of resin is used, and the plane antenna region 810A does not have the front surface electrode 82 and the back surface electrode 84, so that the GPS satellite signal is passed therethrough. Therefore, the GPS satellite signal can be received by the flat antenna 40 without being hindered by the solar cell panel 80B. Further, in this embodiment, the solar cell panel 80B is not provided with a notch, and the front electrode 82 and the back electrode 84 in the flat antenna region 810A are simply removed. It is possible to prevent the planar antenna region 810A from appearing discontinuous.

(4) In each of the above embodiments, Bluetooth communication is mentioned as an example of short-range wireless communication, but the short-range wireless communication may be Wi-Fi using the 2.4 GHz / 5 GHz band.

S ... GPS satellite, R ... Mobile information terminal, 1,1A ... Electronic clock, 30 ... Exterior case, 11 ... Dial, 16-19 ... Through holes, 12-14 ... Subdial, 38 ... Crown, 361-364 ... Button, 11x, 12x, 13x, 14x ... Pointer shaft, 80, 80B ... Solar cell panel, 831-834 ... Through hole, 91, 92 ... Magnetic resistant plate, 15 ... Calendar window, 20 ... Calendar car, 125 ... Main plate, 40 ... Flat antenna, 720, 720B, 720G ... Circuit board, 130 ... Secondary battery, 725 ... Circuit presser plate, 60 ... Control display module, 61 ... Control unit, 610 ... Time information correction unit, 620 ... Display control unit, 630 ... Voltage detection control unit, 640 ... Reception control unit, 641 ... Reception mode selection unit, 642 ... Satellite signal reception control unit, 6421 ... Measuring reception control unit, 6422 ... Positioning reception control unit, 643 ... Short-range wireless communication control unit , 644 ... Reception judgment unit, 62 ... Drive circuit, 63 ... Crystal oscillator, 66 ... RTC, 67 ... ROM, 68 ... Storage unit, 59 ... SAW filter, 50 ... GPS reception module, 51 ... RF unit, 511 ... PLL, 512 ... VCO, 513 ... LNA, 514 ... mixer, 515 ... IF amplifier, 516 ... IF filter, 517 ... ADC, 52 ... baseband, 521 ... DSP, 522 ... CPU, 523 ... RTC, 524 ... SRAM, 53 ... TCXO, 54 ... Flash memory, 80A ... Short-range wireless communication antenna, 150 ... Short-range wireless communication module, 1500 ... RF section, 1511 ... LNA, 1512, 1524 ... BPF, 1513, 1523 ... Mixer, 1514, 1522 ... IF amplifier , 1515 ... ADC, 1501 ... PLL, 1502 ... VCO, 1521 ... ADC, 1525 ... PA, 1600 ... Base band section, 1610 ... Demodulation section, 1620 ... Modulation section, 1700 ... Bluetooth LE controller section, 1701 ... Crystal oscillator, 70 ... power supply module, 71 ... charge control circuit, 72 ... first regulator, 73 ... second regulator, 74 ... voltage detection circuit.

Claims (8)

A flat time display and
With a conductive case
A short-range wireless communication antenna and a short-range wireless communication unit that perform short-range wireless communication housed in the conductive case.
It has a planar antenna and a satellite signal receiving unit that receive position information satellite signals housed in the conductive case.
In a plan view along the normal direction of the time display unit, the short-range wireless communication antenna and the plane antenna overlap with the time display unit.
The frequency of the short-range radio communication is higher than the frequency of the position information satellite signal,
An electronic timepiece characterized in that the thickness center of the short-range wireless communication antenna in the normal direction of the time display unit is located closer to the time display unit than the thickness center of the planar antenna. The electronic clock according to claim 1, wherein the time display unit displays the time by a pointer, and the motor for driving the pointer does not overlap with the planar antenna in the plan view. The electronic clock according to claim 1 or 2, further comprising a solar cell that supplies electric power to the satellite signal receiving unit, and providing an electrode layer of the solar cell in a region that does not overlap with the planar antenna in the plan view. .. The electronic timepiece according to any one of claims 1 to 3, wherein a magnetic resistance plate is provided in a region that does not overlap with the plane antenna in the plan view. The electronic clock according to any one of claims 1 to 4, wherein the short-range wireless communication unit, the satellite signal receiving unit, and the planar antenna are arranged on the same circuit board. A first circuit board on which the short-range wireless communication antenna is arranged and a second circuit board on which the planar antenna is arranged are provided.
The electronic clock according to any one of claims 1 to 4, wherein the first circuit board is arranged closer to the time display unit side than the second circuit board. The feature is that the first circuit board and the plane antenna overlap in the side view perpendicular to the normal direction of the time display unit, and the first circuit board and the plane antenna do not overlap in the plane view. The electronic clock according to claim 6. Claim 1 is characterized in that a plane including the normal line passing through the center of the time display unit and the center of the plane antenna is located between the satellite signal receiving unit and the short-range wireless communication unit. The electronic clock according to any one of 7 to 7.

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