JP6849033B2 - Electronic clock - Google Patents

Description

The present invention relates to an electronic clock that receives either a satellite signal from, for example, a GPS satellite or a standard radio signal from an antenna station, acquires time information, and corrects the time.

Conventionally, there is known an electronic clock that receives a satellite signal from a GPS satellite or a standard radio signal from a long-wave standard radio wave transmission station to acquire time information and adjust the time (see Patent Document 1).
This electronic clock includes two antennas, a patch antenna for receiving high-frequency radio waves for GPS and a bar antenna for receiving long-wave radio waves for standard time. In addition, it is necessary to provide a large button battery (secondary battery) for GPS reception that requires a large amount of power. Further, for multi-functional display, in addition to the pointer, a plurality of sub-display units are also provided, and a plurality of motors are also arranged to drive these.

JP-A-2015-175839

In the electronic timepiece, a secondary battery and a patch antenna are provided so as to overlap each other in the thickness direction of the timepiece. Therefore, there is a problem that the thickness of the movement of the timepiece having the secondary battery, the patch antenna, the bar antenna and the like becomes thick, and it is difficult to make the electronic timepiece thinner.

An object of the present invention is to provide an electronic clock that can receive satellite signals and standard radio wave signals and can be made thinner.

The electronic clock of the present invention includes a flat antenna for receiving satellite signals, a bar antenna for receiving standard radio signals, a time display unit having a plurality of pointers, a plurality of motors for driving the pointers, a battery, and a clock. An electronic watch including a case, wherein the flat antenna, the bar antenna, and the battery are arranged at positions in the watch case that do not overlap with each other in a plane, and the plurality of motors are the flat antennas. The bar antenna and the bar antenna are arranged in the watch case at positions that do not overlap in a plane, and at least one of the plurality of motors is arranged in the watch case at a position that overlaps in a plane with the battery. It is characterized by that.

In the present invention, the fact that the flat antenna, the bar antenna, the battery, the motor, and other parts do not overlap each other in a plane in the watch case means that they are visually recognized from a direction orthogonal to the dial surface of the electronic watch. It means that the parts do not overlap each other.
According to the present invention, since two types of antennas, a planar antenna for receiving the satellite signal and a bar antenna for receiving the standard radio wave signal, are provided, the satellite signal and the standard radio wave signal can be received. Therefore, as compared with an electronic clock having only one type of antenna, the possibility of receiving one of the signals is increased, and the probability of acquiring time information can be improved.
Further, among the parts arranged in the watch case, the flat antenna, the bar antenna, and the battery, which are relatively large parts in thickness, are arranged at positions where they do not overlap each other in a plane, so that the electronic watch can be made thinner. Further, since the plurality of motors are arranged at positions that do not overlap with the plane antenna and the bar antenna in a plane, the electronic clock can be further thinned.
Moreover, since at least one of the plurality of motors is arranged at a position where it overlaps with the battery in a plane (a position where they overlap each other in a plan view), all the motors are arranged so as not to overlap with the battery in a plane. Compared with the case, the flat size of the watch case can be reduced, and the electronic watch can be miniaturized.
Furthermore, since the thickness of the motor and battery can be smaller than that of the flat antenna and the bar antenna, the thickness of the electronic watch when the motor is stacked on the battery in a plane is larger than when the motor is stacked on each antenna. The size can be reduced and the electronic clock can be made thinner.
Further, when the motor is stacked in a plane with the battery, the metal battery functions as a magnetic resistance plate, and the coil of the motor can be prevented from malfunctioning due to the influence of the external magnetic field.

The electronic clock of the present invention has a planar antenna for receiving satellite signals, a bar antenna for receiving standard radio wave signals, a time display unit having a plurality of pointer axes and pointers attached to the pointer axes, and the pointer axes. An electronic watch including a plurality of driving motors, a battery, and a watch case, the flat antenna, the bar antenna, and the battery are arranged at positions in the watch case that do not overlap each other in a plane. The plurality of pointer axes are arranged at positions where the plane antenna and the bar antenna do not overlap in a plane in the watch case, and at least one of the plurality of pointer axes is the watch. It is characterized in that it is arranged at a position in the case that overlaps with the battery in a plane.

According to the present invention, since two types of antennas, a planar antenna for receiving the satellite signal and a bar antenna for receiving the standard radio wave signal, are provided, the satellite signal and the standard radio wave signal can be received. Therefore, as compared with an electronic clock having only one type of antenna, the possibility of receiving one of the signals is increased, and the probability of acquiring time information can be improved.
Further, among the parts arranged in the watch case, the flat antenna, the bar antenna, and the battery, which are relatively large parts in thickness, are arranged at positions where they do not overlap each other in a plane, so that the electronic watch can be made thinner. Further, since the pointer axis is arranged at a position where it does not overlap with the plane antenna and the bar antenna in a plane, the electronic clock can be further thinned.
In addition, since at least one of the plurality of pointer shafts is arranged at a position where it overlaps the battery in a plane, the force applied to the pointer shaft when the pointer is pushed and attached to the guide shaft is flat on the guide shaft. It is also possible to support with overlapping batteries. Therefore, a metal battery having a higher strength than a resin part or the like can support the pushing force at the time of pushing the needle, and stable needle attachment can be ensured.

In the electronic clock of the present invention, the solar cell provided in the watch case is provided, and the electrode layer of the solar cell and the flat antenna do not overlap in a plane, and the electrode layer of the solar cell and the bar It is preferable that the antenna and the antenna overlap in a plane.

In a solar cell, for example, a thin film of an amorphous silicon semiconductor as a power generation layer is laminated on a resin film as a base via a back electrode such as aluminum, and a translucent transparent electrode (translucent transparent electrode) is further formed on the surface of the power generation layer. Surface electrode) is provided. Here, since the frequency of the satellite signal (GPS signal) is as high as 1575.42 MHz, the radio wave is attenuated even in a thin metal portion such as a transparent electrode of a solar cell, and the antenna characteristics are deteriorated. On the other hand, the bar antenna that receives the long wave standard radio wave (40 to 77.5 kHz) can receive the long wave standard radio wave even if it overlaps with the electrode of the solar cell.
Therefore, by not overlapping the electrode layer of the solar cell and the flat antenna in a plane, it is possible to prevent deterioration of the antenna characteristics in the flat antenna. Further, since the electrode layer of the solar cell and the bar antenna are stacked in a plane, the area of the solar cell can be increased and the amount of power generation can be secured.

In the electronic clock of the present invention, the first circuit board and the second circuit board are arranged in the clock case, and the control IC for controlling the drive of the motor and the battery are mounted on the first circuit board. A power supply control IC for controlling the power supply including the power supply is mounted, and the plane antenna, the bar antenna, the satellite signal reception IC for controlling the reception of the satellite signal by the plane antenna, and the satellite signal reception IC are mounted on the second circuit board. It is preferable to mount a standard radio wave receiving IC that controls reception of the standard radio wave signal by the bar antenna.

According to the present invention, since each antenna and the receiving IC of each antenna are mounted together on the second circuit board, the signal path from each antenna to the receiving IC can be shortened, and the signal can be received by the antenna. It is possible to reduce the possibility that noise will affect the signal. Therefore, each receiving IC can process a signal in which the influence of noise is reduced, and can improve the possibility of acquiring correct time information.
Further, since the motor drive control IC and the power supply control IC are provided on the first circuit board different from the second circuit board, the second circuit board and the first circuit board can be arranged separately, and the motor can be arranged. It is also possible to prevent the drive signal and the like from affecting the received signal.

In the electronic watch of the present invention, a first anti-magnetic plate and a second anti-magnetic plate are arranged in the watch case, and the first anti-magnetic plate and the second anti-magnetic plate are flat with the flat antenna and the bar antenna. It is preferable that they do not overlap with each other.

According to the present invention, since the two magnetic-resistant plates, the first magnetic-resistant plate and the second magnetic-resistant plate, are provided, the first magnetic-resistant plate and the second magnetic-resistant plate are arranged on the watch front side and the watch back side of the motor, respectively. be able to. Therefore, it is possible to prevent the motor from being affected by the external magnetic field from the front side of the watch and the back side of the watch, and it is possible to prevent the motor from malfunctioning.
Further, since each anti-magnetic plate is excluded from the portion that overlaps with each antenna in a plane, the radio wave received by each antenna is not obstructed by the anti-magnetic plate, and the reception performance can be ensured.

It is the schematic which shows the electronic clock which concerns on embodiment of this invention. It is a top view of the electronic clock. It is a schematic cross-sectional view of the electronic clock. It is a schematic cross-sectional view of the electronic clock. It is an exploded perspective view which shows the main part of the electronic timepiece. It is a schematic plan view which shows the arrangement of the plane antenna, a bar antenna, a battery, and a step motor of the electronic timepiece. It is a perspective view which shows the 1st circuit board of the electronic timepiece. It is a perspective view which shows the 2nd circuit board of the electronic timepiece. It is the schematic sectional drawing which shows the laminated structure of the solar cell panel of the electronic timepiece. It is a block diagram which shows the circuit structure of the electronic clock. It is a figure which shows the receiving area of a standard radio wave signal. It is a figure which shows the time code format of JJY. It is a figure explaining the structure of the navigation message of the GPS satellite signal. It is a figure explaining the structure of the TLM word of the GPS satellite signal. It is a figure explaining the structure of the HOW word of a GPS satellite signal. It is a block diagram which shows the structure of the control part of the electronic timepiece. It is a flowchart which shows the automatic reception processing of the said embodiment. It is a flowchart which shows the time measurement reception processing of the said embodiment. It is a flowchart which shows the positioning reception processing of the said embodiment. It is a flowchart which shows the standard radio wave reception processing of the said embodiment. It is the schematic which shows the arrangement of the plane antenna, the bar antenna, the battery, and the step motor of the modification of this invention.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings. In the present embodiment, the cover glass 33 side of the electronic watch 1 will be referred to as the front surface side (upper side), and the back cover 34 side will be referred to as the back surface side (lower side).

[Overview of electronic clock]
As shown in FIG. 1, the electronic clock 1 has both a standard radio wave signal from a long-wave standard radio wave transmission station R and a satellite signal from a plurality of GPS satellites S or the like orbiting the earth in a predetermined orbit. It is configured to be able to receive the signal of.
The electronic clock 1 is configured to receive a standard radio wave signal from the long wave standard radio wave transmission station R and acquire time information of the country in which the transmission station R is installed.
Further, the electronic clock 1 is configured to execute a reception process in the time measurement mode (time measurement reception process) and a reception process in the positioning mode (positioning reception process). Here, the time measurement mode is a mode in which satellite signals are received from at least one or more GPS satellites S and the internal time of the electronic clock 1 is corrected based on the time information included in the satellite signals. Further, in the positioning mode, satellite signals are received from three or more (preferably four or more) GPS satellites S, and the orbital information and time information included in the satellite signals are used from the electronic clock 1 to each GPS satellite S. The time zone information of the time indicated by the electronic clock 1 is corrected based on the current position of the electronic clock 1 by calculating the distance to the current position of the electronic clock 1, and the time information acquired from the satellite signal and the above. This mode corrects the internal time of the electronic clock 1 from the time zone information.
When the electronic clock 1 acquires the time information from the standard radio wave signal, the internal time information measured internally can be corrected by the time information. Further, when the time information is acquired from the satellite signal, the internal time information can be corrected based on the time information and the time zone information. The time zone information can be set based on the position information calculated from the satellite signal and the map information stored in the electronic clock 1. Further, the user may operate the buttons 36, 37, crown 38, etc. of the electronic watch 1 to manually select and set the time zone information.

[Electronic clock configuration]
Next, the configuration of the electronic clock 1 capable of receiving the standard radio wave signal and the satellite signal will be described. FIG. 2 is a front view of the electronic clock 1, FIG. 3 is a schematic cross-sectional view of the electronic clock 1 along the 6 o'clock to 12 o'clock direction, and FIG. 4 is a schematic cross-sectional view of the electronic clock 1 along the 3 o'clock to 9 o'clock direction. FIG. 5 is a schematic cross-sectional view, FIG. 5 is an exploded perspective view of a main part of the electronic clock 1, and FIG. 6 is a schematic plan view of the main part of the electronic clock 1.

As shown in FIGS. 3 and 4, 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 is configured by fitting a bezel 32 to a cylindrical case 31. The outer case may be a one-piece case in which the case and the back cover are integrated.
An A button 36, a B button 37, and a crown 38 are provided on the side surface of the outer case 30.

Of the two openings of the case 31, the opening on the front surface side is closed by the cover glass 33 via the bezel 32, and the opening on the back surface side is closed by the back cover 34. A disk-shaped dial 11 is arranged on the inner peripheral side of the bezel 32 via a ring-shaped dial ring 35 made of plastic.
Metal materials such as SUS (stainless steel), titanium alloy, aluminum, and BS (brass) are used for the case (body) 31 and the back cover 34. The bezel 32 may be made of the same metal material as the case 31, but it is preferably made of a ceramic that does not affect radio wave reception.

In the outer case 30, a flat antenna (patch antenna) 40 is arranged as a satellite signal antenna for receiving GPS satellite signals, and a bar antenna 150 is arranged as a standard radio wave antenna for receiving long-wave standard radio waves. .. In the present embodiment, when the electronic clock 1 is viewed from the cover glass 33 side in a plan view, the flat antenna 40 is arranged at the 12 o'clock position and the bar antenna 150 is arranged at the 9 o'clock position with respect to the plane center of the dial 11. ing.

[Internal structure of electronic clock]
Next, the internal structure incorporated in the outer case 30 of the electronic timepiece 1 will be described.
As shown in FIGS. 3 to 5, the dial 11 and the movement 2 made of a light-transmitting member are housed in the outer case 30.

[Dial]

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, and as shown in FIG. 2, the dial 11 is located at 6 o'clock. A first sub-dial 12 provided on the side, a second sub-dial 13 provided on the 10 o'clock to 11 o'clock side of the dial 11, and a calendar small window 15 for visually recognizing the calendar car 20 are provided.

A through hole 16 in which the pointer shaft 27 is arranged is formed at the center position of the plane of the dial 11, and the pointer shaft 27 has a pointer (second hand) 21, a pointer (minute hand) 22, and a pointer (hour hand) for indicating the local time. ) 23 is attached. Therefore, the pointer shaft 27 is composed of three pointer shafts (rotating shafts) to which the pointers 21, 22, and 23 are attached.

A through hole 17 in which the pointer shaft 28 is arranged is formed in the first sub dial 12, and a pointer (minute hand) 24 and a pointer (hour hand) 25 for instructing the home time are attached to the pointer shaft 28. Therefore, the pointer shaft 28 is composed of two pointer shafts (rotating shafts) to which the pointers 24 and 25 are attached.

The second sub dial 13 is formed with a through hole 18 in which the pointer shaft 29 is arranged, and the guide shaft 29 is provided with a pointer 26 for instructing the day of the week and various information.
On the right half of the second sub dial 13, the characters "S, M, T, W, T, F, S" indicating the day of the week are written. In the 7 o'clock direction of the left half of the second sub dial 13 (7 o'clock direction when viewed from the pointer axis 29 of the pointer 26), "DST" indicating that daylight saving time is set and "DST" indicating that daylight saving time is not set are indicated. "・" Is written. Furthermore, a crescent sickle-shaped scale indicating the remaining battery level is displayed at 9 o'clock to 8 o'clock on the left half of the second sub dial 13, and an airplane mark indicating airplane mode is displayed at 10 o'clock. At the 11 o'clock position, the timed reception mode is being executed, the character "1" indicated by the pointer 26 when the timed reception process is successful, and the positioning reception mode is being executed. The character "4+" indicated by the guideline 26 when the positioning reception process is successful is written.
Therefore, the information display unit including the second sub-dial 13 and the pointer 26 switches between the day of the week display and information such as the reception mode of the clock and the remaining battery level. Switching between the day of the week display according to the pointer 26 and the display of various information can be performed by appropriately operating the A button 36 and the B button 37.

[Dial ring]
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 (conical surface), and a scale such as an hour mark and a time difference of world time is printed on this 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.

On the surface of the bezel 32, time difference information indicating the time difference from Coordinated Universal Time (UTC) is indicated by a number. The time difference information may be represented by numbers and symbols other than numbers. Further, the city information representing the representative city name of the time zone may be added together with the time difference information. 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 FIGS. 3 to 5, 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 mechanism 140, which are sequentially arranged from the dial 11 side toward the back cover 34. (Not shown in FIG. 5), train wheel receiver 127 (not shown in FIG. 5), first circuit board 710, second magnetic resistance plate 92, spacer 128 (not shown in FIG. 5), secondary battery 130, second circuit board. A 720 and a circuit holding plate 725 (not shown in FIG. 5) are provided.
As will be described later, a planar antenna (patch antenna) 40 and a bar antenna 150 are mounted on the second circuit board 720.

As shown in FIG. 6, the drive mechanism 140 includes step motors 141 to 145 attached to the main plate 125 and a train wheel (not shown) such as gears pivotally supported between the main plate 125 and the train wheel receiver 127. Have.
The drive mechanism 140 of the present embodiment includes first to fifth drive mechanisms. The first drive mechanism includes a first step motor 141 for driving the second hand 21 and a first wheel train (not shown). The second drive mechanism includes a second step motor 142 for driving the minute hand 22 and the hour hand 23, and a second wheel train (not shown). The third drive mechanism includes a third step motor 143 and a third wheel train (not shown) that drive the minute hand 24 and the hour hand 25 for home time. The fourth drive mechanism includes a fourth step motor 144 for driving the pointer 26 and a fourth wheel train (not shown). The fifth drive mechanism includes a fifth step motor 145 for driving the calendar car 20 and a fifth wheel train (not shown). The fifth wheel train includes a gear (daily wheel) 146 that meshes with the calendar wheel 20 shown in FIG. 5 to rotate the calendar wheel 20.

[Antenna, battery, step motor placement position]
As shown in FIG. 6, a flat antenna 40 is arranged at the 12 o'clock position of the movement 2 in a plan view, and a switching mechanism such as a winding stem 381 or a mandarin duck 382 is arranged at the 3 o'clock position. A secondary battery 130 such as a lithium ion battery is arranged in the region from the center of the movement 2 to the 6 o'clock position, and a bar antenna 150 is arranged at the 9 o'clock position of the movement 2.
Therefore, as shown in FIGS. 3, 4, and 6, the planar antenna 40, the bar antenna 150, and the secondary battery 130 overlap each other in the outer case 30 at positions where they do not overlap in a plane, that is, in a plan view of the movement 2. It is placed in a position where it does not become.
Further, as shown in FIG. 6, the step motors 141 to 145 are positioned so that the flat antenna 40 and the bar antenna 150 do not overlap each other in a plane in the outer case 30, that is, they overlap each other in the plan view of the movement 2. It is placed in a position where it does not become.

[Position of step motor]
Further, in at least a part of the step motors 141 to 145, the step motors 141, 143, 145 are arranged at a position where all or a part of the motors are planarly overlapped with the secondary battery 130 in the outer case 30. ..
The first step motor 141 is arranged at a position in the approximately 8 o'clock direction with respect to the pointer shaft 27 provided at the center position of the movement 2 in a plan view. In the present embodiment, the first step motor 141 is located between the first sub-dial 12 and the second sub-dial 13, and is further arranged at a position where it overlaps the secondary battery 130 in a plane.
The second step motor 142 is arranged at a position in the substantially 2 o'clock direction with respect to the pointer shaft 27 in a plan view. In the present embodiment, the second step motor 142 is arranged at a position that does not overlap the flat antenna 40 and the secondary battery 130.
The third step motor 143 is arranged at the 6 o'clock position of the movement 2 in a plan view, and is arranged at a position where the secondary battery 130 is planarly overlapped with the third step motor 143.
The fourth step motor 144 is arranged at approximately 11 o'clock position of the movement 2 in a plan view. In the present embodiment, the fourth step motor 144 is located between the flat antenna 40 and the bar antenna 150, and is arranged at a position where the fourth step motor 144 does not overlap the antennas 40 and 150 in a plane.
The fifth step motor 145 is arranged at the 5 o'clock position of the movement 2 in a plan view, and is further arranged at a position where it overlaps the secondary battery 130 in a plane.

[Position of pointer axis]
As shown in FIGS. 3, 4 and 6, the pointer shaft 27 provided at the center of the dial 11 is arranged on the upper side of the secondary battery 130, and is located in the outer case 30 so as to be planarly overlapped with the secondary battery 130. Have been placed.
The pointer shaft 28 of the first sub-dial 12 is arranged on the upper side of the secondary battery 130, and is arranged at a position where it overlaps the secondary battery 130 in a plane.
The pointer shaft 29 of the second sub-dial 13 is arranged in the outer case 30 at a position surrounded by the flat antenna 40, the bar antenna 150, and the secondary battery 130, and is arranged at a position that does not overlap with these parts in a plane. There is.
That is, the pointer shafts 27 to 29 are arranged at positions that do not overlap with the plane antenna 40 and the bar antenna 150 in a plane view, and some of the pointer shafts 27 and 28 overlap with the secondary battery 130 in a plane view. It is placed in position.

[Circuit board]
As described above, the electronic clock 1 may include two circuit boards, a first circuit board 710 for clock drive control and a second circuit board 720 for receiving standard radio waves and GPS. As shown in FIG. 4, the first circuit board 710 and the second circuit board 720 are connected via the connector 730 at the 9 o'clock position in a plan view, that is, a position near the bar antenna 150.
[First circuit board]
As shown in FIG. 7, the first circuit board 710 is formed in a substantially circular plane, and in order to prevent wiring and the like from affecting radio wave reception, the portion of the first circuit board 710 that overlaps the plane antenna 40 in a plane is substantially rectangular. The notch 713 of the above is formed, and the bow-shaped portion that overlaps the bar antenna 150 in a plane is cut in a straight line to form a linear cut portion 714.
A power supply control IC 711 and a clock drive control IC CPU-IC 712 are mounted on the surface side of the first circuit board 710.
Further, the first circuit board 710 is formed with holes 715 and grooves 716 in which thick motor coils are arranged in the step motors 141 to 145 in order to reduce the thickness of the movement 2.
Further, the first circuit board 710 is also formed with a hole 717 through which a switch contact spring (not shown) is inserted. When the crown 38 is pulled out from the 0-step position to the 1-step position or the 2-step position, the switch contact spring reciprocates in the rotation direction in conjunction with the rotation of the winding stem 381 and is formed on the inner peripheral surface of the hole 717. It abuts on one of the pair of electrodes. Thereby, the rotation direction and the rotation amount of the winding stem 381 by the crown 38 can be detected.

As will be described later, the power supply control IC 711 has a charge control circuit 71 that controls charging from the solar panel 80 to the secondary battery 130 to prevent overcharging and overdischarging, and the solar panel 80 and the secondary battery. It is provided with a voltage detection circuit 74 that measures a voltage or current of 130. The voltage detection circuit 74 also has a function of detecting that the electronic clock 1 is arranged outdoors by detecting that the solar cell panel 80 is exposed to strong light such as sunlight.

[Second circuit board]
As shown in FIG. 8, the second circuit board 720 is formed in a substantially circular plane, and a substantially circular notch 721 in which the secondary battery 130 is arranged is formed. By arranging the secondary battery 130 in the notch 721, the electronic clock 1 can be made thinner.
On the surface side of the second circuit board 720, there are a flat antenna 40, a bar antenna 150, a GPS-IC501 which is an IC for receiving satellite signals, a crystal oscillator circuit (TCXO) 530 with a temperature compensation circuit, and a memory IC. A flash memory 540, a standard radio wave receiving IC 401, a filter crystal 410, a first regulator 72, and a second regulator 73 are mounted.
The GPS-IC501 incorporates an RF unit 510 and a baseband unit 520, as will be described later. Then, the GPS-IC501, the TCXO530, and the flash memory 540 form a GPS receiving unit 500, which will be described later. Further, the standard radio wave receiving circuit unit 400, which will be described later, is configured by the standard radio wave receiving IC 401 and the filter crystal 410.
The flat antenna 40 is connected to the GPS-IC501, and the bar antenna 150 is connected to the standard radio wave receiving IC 401.
The flash memory 540 stores a firmware program for GPS reception and time zone data for determining the time zone from the position information calculated in the positioning reception process.

[Plane antenna]
The planar antenna 40 receives a satellite signal from the GPS satellite S.
As shown in FIGS. 3 and 5, the flat antenna 40 includes an outer case 30 (case 31 and bezel 32), a solar cell panel 80, a first magnetic resistance plate 91, a first circuit board 710, and a second magnetic resistance plate in a plan view. It does not overlap with 92, but overlaps with the cover glass 33, the dial 11, the calendar wheel 20, and the main plate 125 formed of non-conductive members. That is, in the electronic clock 1, all the parts that overlap with the planar antenna 40 in a plan view on the clock surface side of the planar antenna 40 are formed of non-conductive members.
Therefore, the satellite signal propagated from the surface side of the clock passes through the cover glass 33 and is not blocked by the outer case 30, the solar cell panel 80, the first circuit board 710, and the magnetic resistant plates 91 and 92. It passes through the plate 11, the calendar wheel 20, and the main plate 125 and is incident on the flat antenna 40. The pointers 21 to 23 and 26 may overlap with the planar antenna 40 during hand movement, but since the area of the pointer is small, even if it is made of metal, it does not hinder the reception of satellite signals. However, it is preferable that the pointers 21 to 23 and 26 are made of non-conductive members in that the influence of blocking the satellite signal can be further avoided.

The GPS satellite S transmits satellite signals with right-handed circularly polarized waves. Therefore, the planar antenna 40 of the present embodiment is composed of a patch antenna (also referred to as a microstrip antenna) having excellent circularly polarized characteristics.
As shown in FIGS. 3 and 8, the planar antenna 40 of the present embodiment is a patch antenna in which a conductive antenna electrode portion 42 is laminated on a ceramic dielectric base material 41.
The planar antenna 40 can be manufactured as follows. First, barium titanate having a relative permittivity of about 60 to 100 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. On the back surface of the dielectric base material 41 (the surface on the side of the second circuit board 720), a paste material such as silver (Ag) is mainly screen-printed to form a GND electrode (not shown) that serves as a ground (GND) for the antenna. Omitted).
On the surface of the dielectric base material 41 (the surface on the main plate 125 and the dial 11 side), an antenna electrode portion 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. The antenna electrode portion 42 is formed to be one size smaller than the surface of the dielectric base material 41, and the antenna electrode portion 42 is not laminated around the antenna electrode portion 42 on the surface of the dielectric base material 41. A surface is provided.
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. As shown in FIG. 8, the four corners of the dielectric base material 41 are corner-cut to prevent cracking, but those that are not corner-cut may be used.

The planar antenna 40 is mounted on the surface of the second circuit board 720 and is electrically connected to the GPS-IC501 mounted on the second circuit board 720. Further, by conducting the GND electrode of the flat antenna 40 to the ground pattern of the second circuit board 720, the second circuit board 720 functions as a ground plate (ground plane).
Further, by conducting the ground pattern of the second circuit board 720 to the metal case 31 and the back cover 34 via the circuit holding plate 725, the case 31 and the back cover 34 can also be used as the ground plane. In the present embodiment, as shown in FIG. 3, a back cover conduction spring 725A for conducting the back cover 34 is integrally formed on the circuit holding plate 725 that holds down the second circuit board 720, and the second circuit board. The ground pattern of 720 is used as a ground plane by conducting the ground pattern to the back cover 34 and the case 31 via the circuit holding plate 725 and the back cover conduction spring 725A. 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.

As shown in FIG. 3, the flat antenna 40 is attached to the movement 2 by fixing the second circuit board 720 to the main plate 125. Since the dielectric base material 41 of the flat antenna 40 is ceramic and is hard and easily chipped, a cushioning material 47 such as a sponge is interposed between the dielectric base plate 41 and the main plate 125. Therefore, it is possible to prevent the dielectric base material 41 from colliding with the main plate 125 and being damaged.

[Bar antenna]
As shown in FIGS. 4 and 8, the bar antenna 150 that receives the long-wave standard radio wave is a bar antenna composed of an antenna core 151 and a coil 152 wound around the antenna core 151.
In the antenna core 151, for example, a plurality of cobalt-based amorphous metal foils as magnetic foil materials are laminated to enhance the magnetic characteristics. The method for manufacturing the antenna core 151 is, for example, to punch out the amorphous metal foil with a mold or to form it by etching, and to bond and stack about 10 to 30 pieces in the thickness direction of the electronic timepiece 1. Next, the antenna core 151 is arranged in a resin frame having a concave cross-sectional shape (groove type), and the coil 152 is wound around the antenna core 151 to manufacture the bar antenna 150.
The antenna core 151 includes a coil winding portion around which the coil 152 is wound, and lead portions extending at both ends in the longitudinal direction of the coil winding portion. Each lead portion has a tapered shape in which the width dimension decreases from the base end portion on the coil winding portion side toward the tip end portion.
The antenna core 151 is not limited to the laminated amorphous foil, and may be a soft magnetic metal strip or the like. Further, as the antenna core 151, ferrite, which is inferior in performance but inexpensive, may be used. In this case, the antenna core 151 may be formed by molding with a mold or the like and heat-treated.
The coil 152 wound around the coil winding portion of the antenna core 151 requires an inductance value of about 20 to 100 mH when receiving a long wave standard radio wave (40 to 77.5 kHz). Therefore, in the present embodiment, the coil 152 is formed by winding a uremet wire having a diameter of about 50 μm for several hundred to one thousand and several hundred turns.

The bar antenna 150 having such a configuration is mounted on the second circuit board 720 at the 9 o'clock position of the dial 11 in a plan view, and is electrically connected to the standard radio wave receiving IC 401.

[Solar panel]
As shown in FIG. 9, the solar cell panel 80 includes a surface protective material 81 having translucency, a transparent electrode (TCO: Transparent Conductive Oxide) 82, an amorphous silicon semiconductor thin film (a-si) 83, in order from the surface side. The back surface electrode 84 made of aluminum, the resin film base material 85, and the back surface protective material 86 are laminated.
In the solar cell panel 80, the end faces of the upper and lower electrodes 82 and 84 are covered with a surface protective material 81 and a resin film base material 85 to protect them so that the upper and lower electrodes 82 and 84 do not short-circuit.

As shown in FIG. 5, in the solar cell panel 80, in the plan view of the movement 2, the notch 810 is formed in the portion overlapping with the plane antenna 40, and the notch is not formed in the portion overlapping with the bar antenna 150. .. Therefore, the electrodes (electrode layers) 82 and 84 of the solar cell panel 80 do not overlap with the flat antenna 40 in a plane, but overlap with the bar antenna 150 in a plane.
That is, since the amorphous silicon semiconductor thin film 83 has a thin thickness dimension and the thickness dimensions of the electrodes 82 and 84 are as thin as several μm, the long wave standard radio wave passes through the film-shaped solar cell panel 80 and the bar antenna 150. Can receive standard radio waves even if it overlaps with the electrodes 82 and 84 in a plane.
On the other hand, the frequency of the GPS satellite signal is about 1.5 GHz, which is a high frequency. Therefore, unlike the long-wave standard radio wave, the radio wave is attenuated even by the thin electrodes 82 and 84 of the solar panel 80, and the antenna characteristics are deteriorated. Therefore, if the plane antenna 40 overlaps the electrodes 82 and 84 in a plane, the GPS satellite signal cannot be received.

Therefore, as shown in FIG. 5, the disk-shaped solar cell panel 80 has a notch 810 formed at a portion overlapping the flat antenna 40 in a plan view.
The solar cell panel 80 is formed with an opening 820 that is planarly overlapped with the calendar small window 15 of the dial 11, and through holes 831, 832, and 833 through which the pointer shafts 27 to 29 are inserted.
Further, the solar cell panel 80 is divided into a plurality of cells, and each cell is connected in series. As shown in FIG. 5, the solar cell panel 80 of the present embodiment has four solar cells, and each solar cell is connected in series. Then, the positive electrode and the negative electrode of the solar cell panel 80 are conducted to the power supply terminals for the positive electrode and the negative electrode of the first circuit board 710 by a pair of conductive members 88 composed of coil springs and the like and arranged in the through holes of the main plate 125. Has been done. Then, charging of the secondary battery 130 of the electric power generated by the solar cell panel 80 is controlled by the charge control circuit 71 of the power supply control IC 711.

Since the dial 11 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 timepiece. 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.

[Magnetic resistant plate]
In recent years, high-performance magnets have been widely used in cases for mobile terminals such as smartphones, and wristwatches are also required to have anti-magnetic properties. Therefore, in order to bypass the external magnetic field and prevent the step motors 141 to 145 from malfunctioning, as shown in FIGS. 3 to 5, the first magnetic resistance plate 91 and the second magnetic resistant plate 91 and the second made of a high magnetic permeability material such as pure iron. The magnetic resistance plate 92 is arranged at a position where it overlaps with the step motors 141 to 145 in a plane. Each step motor 141 to 145 includes a coil wound around a core, a stator, and a rotor. Of these, since the coil portion is not easily affected by the external magnetic field, it does not necessarily have to overlap with the magnetic resistant plates 91 and 92 in a plane. Therefore, it is preferable that the magnetic resistance plates 91 and 92 overlap at least a part of the step motors 141 to 145 in a plane, and particularly preferably overlap the stator and the rotor in a plane.

As shown in FIGS. 3 to 5, the first anti-magnetic plate 91 is arranged on the clock surface side (cover glass 33 side) of the main plate 125 and the calendar car 20. The first magnetic resistance plate 91 is arranged so as to substantially cover the surface (the surface on the dial 11 side) of the step motors 141 to 145.
As shown in FIG. 5, the first anti-magnetic plate 91 has a notch 911 that overlaps the calendar small window 15 of the dial 11 in a plane, and through holes 912, 913, and 914 in which the pointer shafts 27 to 29 are arranged. It is formed.
In the first anti-magnetic plate 91, a region overlapping the flat antenna 40 in a plan view is cut out to form a cutout portion 915, and a region overlapping the bar antenna 150 in a plan view is also cut to form a cut portion 916.

As shown in FIGS. 3 to 5, the second anti-magnetic plate 92 is on the back surface side of the watch (back cover 34 side) of the main plate 125, and is arranged on the front surface side of the watch with respect to the second circuit board 720 and the secondary battery 130. There is. Specifically, a train wheel receiver 127 having bearings for each train wheel is arranged on the back surface side of the watch of the main plate 125, and a second magnetic resistance plate 92 is arranged on the back surface side of the watch of the wheel train receiver 127. As a result, the second anti-magnetic plate 92 is arranged so as to substantially cover the back surface (the surface on the back cover 34 side) of the step motors 141 to 145.
Also in the second magnetic resistance plate 92, the region overlapping the flat antenna 40 in a plan view is cut out to form a cutout portion 925, and the region overlapping the bar antenna 150 in a plan view is cut off to form a cut portion 926.
Therefore, the first anti-magnetic plate 91 and the second anti-magnetic plate 92 are configured so as not to overlap the flat antenna 40 and the bar antenna 150 in a plane.

[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 formed of a non-conductive member such as plastic. Here, the calendar car 20 overlaps with at least a part of the plane antenna 40 and the bar antenna 150 in a plan view. The calendar car is not limited to the day car, but may be a day car that displays the day of the week, a lunar car that displays the month, or the like.

[Secondary battery]
As shown in FIGS. 3 to 6, the secondary battery 130 is a lithium ion battery formed in a circular plane. The secondary battery 130 supplies electric power to the drive mechanism 140, the standard radio wave receiving circuit unit 400, the GPS receiving unit 500, and the like. The secondary battery is provided in the cutout portion 721 of the second circuit board 720, and is arranged at a position that does not overlap with the planar antenna 40 and the bar antenna 150 in a plan view as described above. On the other hand, the secondary battery 130 is arranged so as to be planarly overlapped with the step motors 141, 143, 145 and a part of the train wheel.
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, in the present embodiment, a coin-type lithium ion battery having a diameter of about 20 mm (in the present embodiment, a dimension larger than the radius of the dial 11) is used as the secondary battery 130.
Therefore, the thickness dimension of the secondary battery 130 (dimension in the watch thickness direction) is smaller than the diameter of the secondary battery 130 (dimension in the direction along the back cover 34), and has a flat shape. Further, it is arranged in the notch 721 of the second circuit board 720. Therefore, even if the secondary battery 130 is arranged so as to be planarly overlapped with the step motors 141, 143, 145 and a part of the train wheel, the electronic clock 1 can be made thinner.

[Circuit configuration of electronic clock]
FIG. 10 is a schematic view showing a circuit configuration of the electronic clock 1.
The electronic clock 1 mainly includes a standard radio wave receiving unit 4 that receives a long-wave standard radio wave signal and acquires time information, a satellite signal receiving unit 5 that receives a satellite signal and acquires time information, and a control display unit 6. And the power supply unit 7.

Here, as shown in FIG. 11, the long wave standard radio wave signal can be received only in a specific area in the world. That is, JJY40 and JJY60 can be received in the area centered on Japan, BPC is the area centered on China, WWVB is the area centered on the United States, MSF is the area centered on the United Kingdom, and DCF77 is centered on Germany. Can be received in the area.
On the other hand, the GPS satellite signal has an overwhelmingly wide receivable area as compared with the reception area of the long wave standard radio wave, and can be received anywhere on the earth.
Information regarding the reception area in which the long-wave standard radio wave can be received is stored in the storage unit 68, which will be described later.

[Time code format of long wave standard radio signal]
The time information (time code) of the long-wave standard radio wave signal is configured according to a predetermined time information format (time code format) for each country.
For example, in the time code format of the Japanese standard radio wave JJY shown in FIG. 12, one signal is transmitted every second, and one record (one frame) is configured in 60 seconds. That is, one frame is 60-bit data. In addition, the data items include the minute and hour of the current time, the total date from January 1 of the current year, the year (last two digits of the Christian era), the day of the week, and the "leap second". The value of each item is composed of a combination of numerical values assigned for each second (for each bit), and this combination is determined from the type of signal. Further, between the bit string of the total day and the bit string of the year, the parity bit PA1 corresponding to the time and the parity bit PA2 corresponding to the minute are set. In FIG. 12, "M" indicates a marker corresponding to a positive minute (0 seconds per minute), and "P1 to P5" indicates a position marker, the position of which is determined in advance. It is a signal that is
In each item, the signal representing "1" is a signal having a pulse width of about 0.5 seconds, the signal representing "0" is a signal having a pulse width of about 0.8 seconds, and the signal P indicating each marker is. , A signal with a pulse width of about 0.2 seconds.
The time code format of the standard radio wave signal and the pulse width (duty) of each signal are set according to the type of the long wave standard radio wave signal.

[Navigation message of satellite signal]
13 to 15 are diagrams for explaining the structure of the navigation message.
As shown in FIG. 13, the navigation message is configured as data in which a mainframe having a total number of bits of 1500 bits is one unit. Each mainframe is divided into five 300-bit subframes 1-5. 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 1 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 1 to 3 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, subframes 4 and 5 include orbit information (Almanac) and ionospheric correction information of all satellites, which are divided into pages 1 to 25 and housed 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 1 to 5 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. 14, the TLM word includes preamble data, TLM message, Reserved bit, and parity data.
As shown in FIG. 15, the HOW word includes GPS time information called TOW (Time of Week, also referred to as “Z count”). 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 1 indicates GPS time information in which the first bit of the subframe 2 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 1 to 5 shown in FIG. 13 include ID codes of "001", "010", "011", "100", and "101", respectively.

[Standard radio wave receiver]
As shown in FIG. 10, the standard radio wave receiving unit 4 includes a bar antenna 150 and a standard radio wave receiving circuit unit 400. The bar antenna 150 receives a long-wave standard radio wave (hereinafter, referred to as "standard radio wave" or "standard radio wave signal"), and outputs the received standard radio wave to the standard radio wave receiving circuit unit 400. The standard radio wave receiving circuit unit 400 demodulates the received signal of the standard radio wave received by the bar antenna 150 and outputs it as a TCO (Time Code Out) signal to the control unit 61 of the control display unit 6.

The standard radio wave receiving circuit unit 400 includes a standard radio wave receiving IC 401 and a filter crystal 410. The standard radio wave receiving IC 401 includes a tuning circuit 411, an amplifier circuit 412, a mixer circuit 413, an IF (Intermediate Frequency) amplifier circuit 414 using a filter crystal 410, an amplifier circuit detection circuit 415, and an automatic gain control circuit. AGC (Auto Gain Control) circuit 416, a binarization circuit 417, a PLL (phase locked loop) circuit 418, and a VCO (Voltage Controlled Oscillator) 419 are provided. The standard radio wave receiving circuit unit 400 is a general circuit that receives a standard radio wave.

The tuning circuit 411 is configured to include a capacitor, and a parallel resonance circuit is formed by the tuning circuit 411 and the bar antenna 150. The tuning circuit 411 is configured to be able to select and receive standard radio waves of "JJY (JJY40 and JJY60)", "WWVB", "DCF77", "MSF", and "BPC".
As will be described later, when the position information (latitude, longitude) of the electronic clock 1 is obtained by the satellite signal receiving unit 5, the control unit 61 standardizes the selection signal of the receiving station based on the position information. Output to the radio wave receiving circuit unit 400. The tuning circuit 411 of the standard radio wave receiving circuit unit 400 automatically selects a receiving station by the control signal.
When the position information of the electronic watch 1 is not obtained by the satellite signal receiving unit 5, the user operates an operating member such as the crown 38 to select a time zone (time difference), thereby corresponding to the receiving station. Can be selected.

The amplifier circuit 412 adjusts the gain according to the signal (AGC voltage) input from the AGC circuit 416, amplifies the received signal input from the tuning circuit 411 to a constant amplitude, and inputs the signal to the mixer circuit 413.
The mixer circuit 413 mixes the received signal with the signal of VCO419 and down-converts it to IF (Intermediate Frequency).
The IF amplifier circuit 414 further amplifies the received signal input from the mixer circuit 413 and outputs it to the envelope detection circuit 415.
The envelope detection circuit 415 includes a rectifier (not shown) and a low-pass filter (LPF) (LPF) (not shown), rectifies and filters the input received signal, and filters the envelope signal obtained. , Output to the AGC circuit 416 and the binarization circuit 417.
The AGC circuit 416 outputs a signal that determines the gain when the amplifier circuit 412 amplifies the received signal based on the envelope signal input from the envelope detection circuit 415.
The binarization circuit 417 compares the envelope signal input from the envelope detection circuit 415 with the reference voltage (threshold) and outputs a binarization signal, that is, a TCO signal.

[Satellite signal receiver]
The satellite signal receiving unit 5 includes a planar antenna 40, a filter (SAW) 111, and a GPS receiving unit (reception module) 500.
The filter 111 is a bandpass filter that allows a 1.5 GHz satellite signal to pass through. Further, an LNA (low noise amplifier) for improving reception sensitivity may be separately incorporated between the planar antenna 40 and the filter 111. The filter 111 may be incorporated in the GPS receiving unit 500.

The GPS receiver 500 processes the satellite signal that has passed through the filter 111, and includes a GPS-IC501, which is an IC for receiving satellite signals, a crystal oscillator circuit (TCXO) 530 with a temperature compensation circuit, and a flash memory 540. I have.
The GPS-IC501 includes an RF unit (Radio Frequency) 510 and a baseband unit 520.
The RF unit 510 includes a PLL circuit 511, a VCO (Voltage Controlled Oscillator) 512, an LNA (Low Noise Amplifier) 513, a mixer 514, an IF amplifier 515, an IF filter 516, an ADC (A / D converter) 517, and the like. ..

The satellite signal that has passed through the filter 111 is amplified by LNA 513, mixed with the signal of VCO 512 by the mixer 514, and down-converted to IF (Intermediate Frequency).
The IF mixed by 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 520 includes a DSP (Digital Signal Processor) 521, a CPU (Central Processing Unit) 522, an RTC (real-time clock) 523, and a SRAM (Static Random Access Memory) 524. Further, a crystal oscillator circuit (TCXO) 530 with a temperature compensation circuit, a flash memory 540, and the like are also connected to the baseband portion 520.
Then, the baseband unit 520 can acquire satellite time information and positioning information by inputting a digital signal from the ADC 517 of the RF unit 510 and performing correlation processing, positioning calculation, and the like.
The clock signal for the PLL circuit 511 is generated from the TCXO530.

The flash memory 540 stores a time difference database in which positioning information (latitude data and longitude data) and time difference data (time zone data) are associated with each other. Therefore, if the positioning information can be calculated by receiving the satellite signal, the time difference (time zone) of the point received from the latitude / longitude data and the time difference database can be detected and set. An EEPROM (Electrically Erasable Programmable Read-Only Memory) may be used instead of the flash memory 540.
Further, in the present embodiment, the time difference database is stored in the flash memory 540 of the GPS receiving unit 500, but a non-volatile memory such as an EEPROM or a flash memory is provided in the control unit 61 of the control display unit 6, and this non-volatile memory is provided. The time difference database may be stored in the memory.

[Control display]
The control display unit 6 includes a control unit (CPU) 61, a drive circuit 62 for driving the pointers 21 to 26, a crystal oscillator 63, a time display unit, an information display unit, and the like.
The control unit 61 includes an RTC 66, a ROM 67, and a storage unit 68. The RTC 66 measures internal time information using a reference signal output from the crystal oscillator 63. 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 unit 500 and TCO (total cost of ownership) output from the standard radio wave receiving circuit unit 400.

The control unit 61 switches and activates the standard radio wave receiving unit 4 and the satellite signal receiving unit 5 by outputting a control signal to the standard radio wave receiving unit 4 and the satellite signal receiving unit 5. 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 as compared with the long wave standard radio wave. Therefore, the GPS satellite signal reception process by the satellite signal receiving unit 5 requires about 500 times as much power as the standard radio wave reception process by the standard radio wave receiving unit 4.
Therefore, the control unit 61 does not operate the standard radio wave receiving unit 4 and the satellite signal receiving unit 5 at the same time, but switches and activates them.
The electronic clock 1 of the present embodiment includes the standard radio wave receiving unit 4, the satellite signal receiving unit 5, and the control display unit 6 as described above, and is based on the standard radio wave signal received from the long wave standard radio wave transmitting station R. The time information can be automatically corrected, and the time display can be automatically corrected based on the satellite signal received from the GPS satellite S.

[Power supply unit]
The power supply unit 7 includes a solar cell panel 80, a charge control circuit 71, a secondary battery 130, a first regulator 72, a second regulator 73, and a voltage detection circuit 74.

When light is incident on the solar panel 80 to generate electricity, the power obtained by the photovoltaic power generation is supplied to the secondary battery 130 through the charge control circuit 71 to charge the secondary battery 130.
The secondary battery 130 supplies drive power to the control display unit 6 and the standard radio wave reception circuit unit 400 via the first regulator 72, and supplies drive power to the GPS reception unit 500 via the second regulator 73. Therefore, the power supply means for supplying the driving power by the secondary battery 130 is configured.

The voltage detection circuit 74 monitors the voltage of the secondary battery 130 and outputs it to the control unit 61. Therefore, the voltage detection circuit 74 constitutes a battery level detection unit that detects 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 generated 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]
Next, the configuration of the control unit 61 will be described with reference to FIG. FIG. 16 is a functional block realized mainly by a program executed by the control unit 61.
The control unit 61 includes a time information correction unit 610, a display control unit 620, a voltage detection control unit 630, and a reception control unit 640.
The time information correction unit 610 corrects the internal time information by using the time information received by the standard radio wave receiving unit 4 or the satellite signal receiving unit 5.

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 drive circuit 62 based on the internal time information, and displays the day of the week (Sunday to Saturday) with the pointer 26. Further, the display control unit 620 controls the display of the pointer 26 according to the reception control state and the like.
The voltage detection control unit 630 operates the voltage detection circuit 74 to detect 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. The voltage detection control unit 630 operates the voltage detection circuit 74 at regular time intervals to detect the voltage. 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 standard radio wave reception control unit 645, and a reception determination unit 646. The satellite signal reception control unit 642 includes a time measurement reception control unit 643 and a positioning reception control unit 644.

The reception mode selection unit 641 determines that the reception operation by pressing the A button 36 or the preset automatic reception condition is satisfied, and determines that the satellite signal reception mode (measurement mode and positioning mode) and the standard radio wave are met. Select the receive mode. The reception mode selection unit 641 selects the time measurement mode when the A button 36 is pressed for the first predetermined time (for example, 3 seconds or more and less than 6 seconds), and the A button 36 selects the second predetermined time (for example, 6 seconds). (Above) When pressed, the positioning mode is selected. Further, when the voltage detection circuit 74 detects that the electronic clock 1 is arranged outdoors and the automatic reception condition is satisfied, the reception mode selection unit 641 normally selects the time measurement mode and the electronic clock. The positioning mode is selected only once after canceling the reception off mode of 1.
The satellite signal reception control unit 642 is operated when the reception mode of the satellite signal is selected by the reception mode selection unit 641.

When the time measurement mode is selected, the satellite signal reception control unit 642 operates the time measurement reception control unit 643, and the time measurement reception control unit 643 controls the satellite signal reception unit 5 to perform the time measurement reception processing. Do.
When the positioning mode is selected, the satellite signal reception control unit 642 operates the positioning reception control unit 644, and the positioning reception control unit 644 controls the satellite signal reception unit 5 to perform the positioning reception process.

The standard radio wave reception control unit 645 is operated when the reception mode of the standard radio wave is selected by the reception mode selection unit 641. The standard radio wave reception control unit 645 controls the standard radio wave reception unit 4 to perform standard radio wave reception processing.

The reception determination unit 646 determines whether or not the time measurement reception processing by the time measurement reception control unit 643, the positioning reception processing by the positioning reception control unit 644, and the standard radio wave reception processing by the standard radio wave reception control unit 645 are successful.
For example, during the time measurement reception process, the reception determination unit 646 compares the time information (Z count) acquired from the received satellite signal with the time data of the RTC 66. If these differences are large, the Z counts of the next subframe are acquired to compare the Z counts of the two to prevent erroneous correction, or if there are multiple captured satellites, each Z acquired from multiple satellites. It is determined whether the acquired time data is consistent by comparing the counts. The time information correction unit 610 corrects the time when the reception determination unit 646 determines that the matching is achieved.

[Automatic reception processing procedure]
Next, in the present embodiment, the automatic reception process for performing the reception process when the preset automatic reception conditions are met will be described with reference to FIGS. 17 to 20.
The control unit 61 executes the process shown in FIG. 17 when the electronic clock 1 is not set to the mode (airplane mode) for prohibiting the automatic reception process. The automatic reception process of FIG. 17 is executed at a preset time, for example, at 2:00 am when there is little noise affecting the reception of standard radio waves.

The voltage detection circuit 74 is operated at regular intervals, for example, at intervals of 60 seconds, under the control of the voltage detection control unit 630. Since the voltage detection circuit 74 detects the battery voltage of the secondary battery 130 at intervals of 60 seconds, the control unit 61 constantly grasps the state of the remaining battery level (storage amount) of the secondary battery 130.
Further, even if the voltage detection control unit 630 performs a standard radio wave reception process in which the current consumption is smaller than that of the GPS satellite signal reception process as the battery voltage of the secondary battery 130, the control unit 61 may go down. The voltage is set to a predetermined value 1. Further, the voltage detection control unit 630 sets a voltage at a predetermined value 2 so that the control unit 61 does not go down even if the GPS satellite signal reception process, which consumes a large amount of current as compared with the standard radio wave reception process, is performed. The predetermined value 2 is usually set to a voltage at which the control unit 61 does not go down even if the positioning reception process is performed, and is a voltage value larger than the predetermined value 1. For example, the predetermined value 1 is 3.4 V, the predetermined value 2 is 3.6 V, and these values may be set based on the discharge characteristics of the secondary battery 130.
In the present embodiment, the remaining battery level of the secondary battery 130 is detected by detecting the battery voltage of the secondary battery 130, but for example, a means for detecting the charge / discharge current of the secondary battery 130 is also added. Then, if it is judged by the combination of the charge / discharge current amount and the battery voltage, the detection accuracy of the remaining battery level is further improved.

The control unit 61 detects the battery voltage of the secondary battery 130 every 60 seconds by the voltage detection circuit 74, which is the battery remaining amount detection unit, and determines whether or not the preset value is 1 or more (S1).
When the battery voltage is less than the predetermined value 1 and the control unit 61 determines “NO” in S1, the drive circuit 62 starts the irregular hand movement (S2) and maintains the reception prohibited state (S3). The irregular hand movement is a BLD hand movement called a battery low display or a battery life indicator. For example, the pointer 21 is moved every 2 seconds for 2 seconds. It operates differently from normal hand movement. As a result, the user can confirm that the voltage of the secondary battery 130 has dropped, and can charge the solar cell panel 80 by shining light on it.
During the irregular hand movement, the control unit 61 periodically checks the battery voltage by the voltage detection circuit 74, for example, every second, and executes the process of S1. Then, the control unit 61 continues the irregular hand movement of S2 and the reception prohibition state of S3 until it determines YES in S1.

When the battery voltage is a predetermined value of 1 or more and the control unit 61 determines "YES" in S1, the control unit 61 succeeds in receiving the standard radio wave in the scheduled reception process immediately before (for example, within 24 hours), and the standard radio wave reception data exists. It is determined whether or not the reception fails and the data does not exist (S4). That is, even if the standard radio wave reception data exists, if the reception data is acquired 24 hours or more ago, the control unit 61 determines "NO" in S4, and the data received within 24 hours is received. If it exists, it is judged as "YES".

If the control unit 61 determines "YES" in S4, the control unit 61 does not need to receive the GPS satellite signal, and therefore returns to the process of S1. As a result, as will be described later, if the standard radio wave is received at the standard radio wave fixed time reception time such as 2:00 am and the time information is successfully acquired, the GPS satellite signal will be displayed until the standard radio wave fixed time reception time on the next day. No reception processing is performed. Therefore, if the standard radio wave is received at the regular reception time of the standard radio wave every day and the time information is acquired successfully, the GPS satellite signal reception process is not executed, and the standard radio wave reception process is preferentially executed. It will be.
On the other hand, when the standard radio wave reception processing is not performed at the standard radio wave regular reception time, when the reception processing is performed but the standard radio wave cannot be received, or when the standard radio wave is received but the acquisition of time information fails, that is, If the acquisition of the time information by receiving the standard radio wave signal fails and the standard radio wave reception data does not exist, the control unit 61 determines "NO" in S4 and proceeds to the process of S5.

When the control unit 61 determines "NO" in S4, it determines whether the internal time (current time) measured by the control unit 61 is a preset standard radio wave fixed time reception time (S5). The standard radio wave regular reception time is set to 2:00 am, which is a time zone with less noise. Further, the standard radio wave regular reception time may be set to a plurality of times such as 2:00 am, 3:00 am, and 4:00 am. In this case, if the reception processing fails at 2:00 am, the reception processing may be performed even at 3:00 am, and if the reception processing fails at 3:00 am, the reception processing may be performed at 4:00 am. ..

When the internal time reaches the standard radio wave fixed time reception time, the control unit 61 determines “YES” in S5. In this case, the control unit 61 stops the hand movements of the pointers 21 to 26 by the drive circuit 62 (S6). At this time, the pointer 26 or the like may indicate that the standard radio wave is being received.
Next, the control unit 61 starts the reception process of the standard radio wave (S50). The reception process of this standard radio wave will be described later.

When the control unit 61 does not correspond to the scheduled reception time (when it is determined as "NO" in S5), the control unit 61 determines whether or not the battery voltage detected by the voltage detection circuit 74 is a predetermined value 2 or more (S7). ).
When the control unit 61 determines "YES" in S7, it determines whether or not there is outdoor detection (S8). The outdoor detection determines whether or not the solar cell panel 80 is irradiated with sunlight. That is, the outdoor detection is performed by using the power generation amount detection by the solar cell panel 80, and when the strong light of about 10,000 lux or more is detected, it is determined that the electronic clock 1 is arranged outdoors. Therefore, the control unit 61 periodically controls the charge control circuit 71 to cut the charging path between the solar cell panel 80 and the secondary battery 130, and in that state, the voltage of the solar cell panel 80 is detected by the voltage detection circuit. It is detected by 74, and if it is equal to or higher than a predetermined voltage, it is detected as being outdoors. The control unit 61 may prohibit the outdoor detection determination process and the GPS satellite signal reception process while the internal time is at night (for example, from 21:00 to 5:00). This is because it does not receive strong light such as sunlight at night and cannot detect that the electronic clock 1 is arranged outdoors.

If the control unit 61 determines "NO" in either S7 or S8, it returns to the processing of S1, and if it determines "YES" in S7 or S8, the pointer 26 is set to the "1" position or immediately after the airplane mode is released. When the positioning mode is selected in, the user moves to the position of "4+" and displays that the GPS satellite signal is being received (S9).
Next, the control unit 61 starts reception processing of GPS satellite signals (S20, S30). That is, when the battery voltage is a predetermined value 2 (3.6 V) or more and there is outdoor detection, normally, the time measurement reception process (S20) is executed, and the positioning reception process (S30) is performed only once after the airplane mode is released. ) Is executed.
Therefore, if the daily reception of the standard radio wave fails, the GPS satellite signal reception process is executed if the conditions of S7 and S8 are met.

[Timed reception processing]
Next, the timed reception process (S20) shown in FIG. 18 will be described. In the present embodiment, the process of FIG. 18 is executed in the state where the guideline 26 indicates the reception mode in S9.
The time measurement reception control unit 643 starts the satellite search (S21). Then, the time measurement reception control unit 643 determines whether or not the satellite could be captured (S22). When the time measurement reception control unit 643 determines "NO" because the satellite cannot be acquired in S22, the elapsed time from the start of the time measurement reception is a predetermined timeout time for satellite acquisition (for example, 15 seconds). It is determined whether or not it has become (S23).

When the time-out reception control unit 643 has elapsed the time-out time in S23 and timed out (YES in S23), the time measurement reception control unit 643 ends the reception (S24), and the control unit 61 returns to the normal hand movement (S25).
On the other hand, if the timed reception control unit 643 has not timed out in S23 (NO in S23), the timed reception control unit 643 continues the satellite search process in S21.

When the time measurement reception control unit 643 determines that the satellite can be acquired in S22 (YES in S22), it determines whether or not the time data (Z count) can be acquired (S26). 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 time measurement reception control unit 643 determines "NO" in S26, it determines whether or not a predetermined timeout time (for example, 30 seconds) has elapsed (S27).

When the time measurement reception control unit 643 determines "NO" in S27, the time measurement reception control unit 643 repeats the process of S26. Since the Z count can be received at intervals of 6 seconds in the GPS satellite signal, if the timeout time of S27 is 30 seconds, the Z count can be received 5 times before the timeout.

When the time-out reception control unit 643 times out in S27 (YES in S27), the time measurement reception control unit 643 ends the reception process (S24) and returns to the normal hand movement (S25).
On the other hand, when the time measurement reception control unit 643 determines "YES" in S26, the reception is terminated (S28), and the time information correction unit 610 corrects the time information based on the acquired time data (S29). .. 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 returns the guideline 26 to the day of the week display. , Return to normal hand movement (S25).
As a result, the timed reception process when the automatic reception condition is satisfied is completed. When the time measurement reception process is completed, the control unit 61 returns to S1 in FIG. 17 and continues the process.

[Positioning reception processing]
Next, the positioning reception process S30 will be described with reference to FIG.
When the positioning reception process S30 is started, the display control unit 620 instructs the guideline 26 that the positioning reception is in progress (S31). That is, the display control unit 620 indicates the symbol “4+” displayed on the left side of the second sub dial 13 with the pointer 26 during the positioning reception process. Further, the positioning reception control unit 644 outputs a control signal to the GPS reception unit 500 and starts the positioning reception process (S31).

When the start of positioning reception is instructed, the GPS receiving unit 500 (baseband unit 520) performs satellite search processing (S32).
In the satellite search process, the GPS receiving unit 500 determines that the GPS satellite S has been captured when the reception level of the satellite signal is equal to or higher than a preset predetermined level.
Then, the GPS receiving unit 500 determines whether or not a predetermined number (at least 3, usually 4) or more satellite signals required for positioning can be captured (S33).

When the GPS receiving unit 500 determines "NO" in S33, it determines whether the time-out time for satellite search processing has elapsed (S34). The timeout time for this satellite search process is, for example, 15 seconds.
When the GPS receiving unit 500 determines "NO" in S34, the GPS receiving unit 500 continues the satellite search process in S32.
If the GPS receiving unit 500 determines "YES" in S34, the GPS receiving unit 500 ends the positioning reception process (S35), and the control unit 61 returns to the normal hand movement (S36). In this case, it is determined that the electronic clock 1 is arranged in an environment where the GPS satellite S cannot be captured, and the reception process is continued to avoid consuming the power of the secondary battery 130.

When the GPS receiving unit 500 determines "YES" in S33, it determines whether or not the satellite orbit data (ephemeris) can be acquired from the captured satellite signal (S37).
When the GPS receiving unit 500 determines "Yes" in S37, it performs positioning calculation based on the acquired satellite orbit data, and determines whether the positioning calculation is completed (S38).

When the GPS receiving unit 500 determines "No" in S37 and S38, it determines whether the timeout time for positioning calculation has elapsed (S39). The timeout time for this positioning calculation is, for example, 120 seconds.
When the GPS receiving unit 500 determines in S39 that the time-out has occurred (YES in S39), the GPS receiving unit 500 ends the receiving process (S35), and the control unit 61 returns to the normal hand movement process (S36).
On the other hand, when the GPS receiving unit 500 determines in S39 that the time-out has not occurred (NO in S39), the GPS receiving unit 500 returns to S37 and continues the process.

When the GPS receiving unit 500 determines "Yes" in S38, the GPS receiving unit 500 ends the reception process (S40), and the time difference information corresponding to the positioning information calculated by the positioning calculation is stored in the flash memory 540 from the time difference database. It is read out and output to the control unit 61 (S41).
The time information correction unit 610 of the control unit 61 corrects the time information using the time difference information output from the GPS reception unit 500, and the display control unit 620 displays the corrected time with the pointers 21 to 23 (S42). .. After that, the control unit 61 performs a normal hand movement process (S36).
As a result, the positioning reception process when the automatic reception condition is satisfied is completed. When the positioning reception process is completed, the control unit 61 returns to S1 in FIG. 17 and continues the process.

[Standard radio wave reception processing]
Next, the standard radio wave reception process (S50) shown in FIG. 20 will be described.
When the reception process is started, the control unit 61 selects a receiving station (type of standard radio wave) (S51). As described above, the receiving station is selected based on the position information obtained by the positioning reception process and the time zone data set by the user's selection. If the previous reception process is successful, the previous reception station is set.

Next, the control unit 61 performs a second synchronization process based on the TCO signal output from the binarization circuit 417 (S52). The control unit 61 establishes second synchronization by confirming whether the rising timing of the input TCO signal is at 1-second intervals.

When it is determined in S52 that the second synchronization has failed (NO in S52), the control unit 61 determines whether the reception of all the stations has been completed (S53). Then, if NO in S53, the control unit 61 returns to the receiving station selection in S51, selects another station, and continues the process. Note that "all stations" determined in S53 means all standard radio waves that can be received by the electronic clock 1 (for example, when JJY40, JJY60, WWVB, BPC, DCF77, and MSF are set to be receivable). (All stations), or only stations that can receive based on the position information obtained at the time of positioning reception (for example, if the position information is London, two stations, MSF and DCF77) may be used.
When the control unit 61 determines YES in S53, it determines that the standard radio wave cannot be received, ends the reception (S54), and returns to the normal hand movement (S55).

When the control unit 61 determines in S52 that the second synchronization is successful, the control unit 61 acquires a marker indicating the 0 second position of the time code and performs frame synchronization (S56). For example, in Japan's standard radio wave JJY, the portion where the markers P0 and M are continuous is the start point of the time code, and frame synchronization can be established by detecting the continuous markers.

When the marker is acquired and the frame synchronization is established, the control unit 61 decodes the TCO signal output from the binarization circuit 417 and acquires the time code (TC) (S57).
Next, the control unit 61 determines whether a predetermined time (for example, 5 minutes) has elapsed from the start of reception (S58). If YES in S58, it is determined that the standard radio wave cannot be received even if the reception process is continued and the power is wasted, and the control unit 61 ends the reception (S54). Return to normal hand movement (S55).

When the control unit 61 determines NO in S58, the control unit 61 determines whether the time data is consistent (S59). That is, the control unit 61 determines whether the check by the parity bit, the time when the time data does not exist, or the like.
When the control unit 61 determines YES in S59, the control unit 61 determines whether the three frame data match (S60). The control unit 61 determines that the three-frame data match when the time data obtained by acquiring the three consecutive time codes are at 1-minute intervals.

When the control unit 61 determines NO in S59 or S60, the control unit 61 returns to the time code acquisition process of S57.
If the control unit 61 determines YES in S60, the control unit 61 terminates the standard radio wave reception operation because an accurate TC has been acquired (S61). After that, the control unit 61 corrects the internal time with the acquired TC (S62) and returns to the normal hand movement (S55).
As a result, the standard radio wave reception process when the automatic reception condition is satisfied is completed. When the standard radio wave reception process is completed, the control unit 61 returns to S1 in FIG. 17 and continues the process.

[Manual reception processing procedure]
In the present embodiment, the standard radio wave reception processing is only automatic reception processing, but GPS reception processing (measurement reception processing, positioning reception processing) is set so that manual reception by operating the A button 36 can also be performed. Since the specific reception process of the manual reception process is the same as that of the automatic reception process, the description thereof will be omitted.

[Action and effect of the embodiment]
Since the electronic clock 1 is provided with a receiving unit that receives two types of radio waves, a satellite signal receiving unit 5 and a standard radio wave receiving unit 4, the probability that time information can be acquired can be improved.
Further, among the parts arranged in the outer case 30 of the electronic timepiece 1, the flat antenna 40, the bar antenna 150, and the secondary battery 130, which are relatively large parts in thickness, are arranged at positions where they do not overlap with each other in a plane. Therefore, the electronic clock 1 can be made thinner.
Further, since the step motors 141 to 145 are arranged at positions that do not overlap with the flat antenna 40 and the bar antenna 150 in a plane, the electronic clock 1 can be further thinned.

In addition, of the plurality of step motors 141 to 145, three motors, the first step motor 141, the third step motor 143, and the fifth step motor 145, are arranged at positions that overlap with the secondary battery 130 in a plane. Compared with the case where all the step motors 141 to 145 are arranged so as not to overlap with the secondary battery 130 in a plane, the plane size of the outer case 30 can be reduced and the electronic clock 1 can be miniaturized.
Further, since the step motors 141 to 145 and the secondary battery 130 can have a smaller thickness than the flat antenna 40 and the bar antenna 150, the step motors 141, 143, and 145 are stacked in a plane with the secondary battery 130. Further, as compared with the case where the step motors 141 to 145 are overlapped with the antennas 40 and 150, the thickness dimension of the electronic clock 1 can be reduced and the electronic clock 1 can be made thinner.

Further, when the step motors 141 to 145 are stacked on the secondary battery 130 in a plane, the metal battery also functions as a magnetic resistance plate, so that the step motors 141 to 145 may malfunction due to the influence of the external magnetic field. Can be prevented.
In addition, of the plurality of pointer shafts 27 to 29, the guide shafts 27 and 28 are arranged at positions that overlap with the secondary battery 130 in a plane, so that when the pointers 21 to 25 are pushed into the guide shafts 27 and 28 to be attached. , The force applied to the pointer shafts 27 and 28 can be supported by the secondary battery 130. That is, the train wheel receiver 127, the first circuit board 710, the second magnetic resistance plate 92, the spacer 128, and the secondary battery 130 are sequentially laminated. Therefore, the force when the pointers 21 to 25 are pushed into the pointer shafts 27 and 28 can be supported by the metal secondary battery 130, which has higher strength than the resin parts and the like, and stable needle attachment can be ensured.

Since the notch 810 is formed in the solar cell panel 80 and the electrodes 82 and 84 and the flat antenna 40 are arranged so as not to overlap in a plane, deterioration of the antenna characteristics in the flat antenna 40 can be prevented.
Further, since the electrodes 82 and 84 of the solar cell panel 80 and the bar antenna 150 are overlapped in a plane, the area of the solar cell can be increased and the amount of power generation can be secured.

Since the antennas 40 and 150 and the receiving ICs (GPS-IC501, standard radio wave receiving IC401) of the antennas 40 and 150 are mounted together on the second circuit board 720, the antennas 40 and 150 are mounted on the second circuit board 720. The signal path from to to the receiving ICs 401 and 501 can be shortened, and the possibility that noise affects the signal received by the antenna can be reduced. Therefore, each receiving IC can process a signal in which the influence of noise is reduced, and can improve the possibility of acquiring correct time information.
Further, since the power supply control IC 711 and the CPU-IC 712 for drive control of the step motors 141 to 145 are provided on the first circuit board 710 different from the second circuit board 720, the second circuit board 720 and the first circuit board are provided. It can be arranged apart from the 710, and it is possible to prevent the drive signals of the step motors 141 to 145 from affecting the received signals.

Since the movement 2 of the electronic watch 1 includes two anti-magnetic plates, a first anti-magnetic plate 91 and a second anti-magnetic plate 92, the first anti-magnetic plates are formed on the front surface side and the back surface side of the timepiece of the step motors 141 to 145, respectively. The 91 and the second anti-magnetic plate 92 can be arranged. Therefore, it is possible to prevent the step motors 141 to 145 from being affected by the external magnetic field from the watch front side and the watch back side, and to prevent the step motors 141 to 145 from malfunctioning.
Further, since the anti-magnetic plates 91 and 92 are excluded from the portion that overlaps with the respective antennas 40 and 150 in a plane, the radio waves received by the respective antennas 40 and 150 are not obstructed by the anti-magnetic plates 91 and 92. Reception performance can also be ensured.

Further, since the satellite signal receiving unit 5 is set by the satellite signal receiving control unit 642 to meet the automatic reception condition only when the remaining battery level is 2 or more, the battery voltage is increased by the operation of the satellite signal receiving unit 5. It is possible to surely prevent the system from going down due to a decrease.
Since the standard radio wave receiving unit 4 is set by the standard radio wave reception control unit 645 to be operable when the remaining battery level is 1 or more, the standard radio wave receiving unit 4 can be operated even when the remaining battery level is less than the predetermined value 2. Can operate. Therefore, the chances of operating the standard radio wave receiving unit 4 can be increased, and the time lag can be reduced.
Further, since the standard radio wave receiving unit 4 prohibits reception when the remaining battery level is less than a predetermined value 1, it is possible to reliably prevent the system from going down below the minimum operating voltage of the control unit 61 due to a decrease in the power supply.

Since the standard radio wave reception control unit 645 operates the standard radio wave reception unit 4 when the timed time reaches the set reception time, the standard radio wave reception process can be executed at a fixed time every day. Since the satellite signal reception control unit 642 operates the satellite signal reception unit 5 only when the reception of the standard radio wave is not successful, the standard radio wave reception unit 4 can be operated preferentially, and the satellite signal reception unit cannot receive the standard radio wave. 5 can be operated. Therefore, when the electronic clock 1 is used in an area where the standard radio wave can be received, the time information can be acquired by the standard radio wave receiving unit 4 which consumes less current, and the satellite signal receiving unit is used in the area where the standard radio wave cannot be received. Time information can be acquired by 5. Therefore, the power consumption of the reception process for acquiring the time information can be suppressed.

Since the predetermined value 2 which is the condition for operating the satellite signal receiving unit 5 is set to a value at which the remaining battery level does not drop to the system down level due to the positioning reception processing, the current consumption is compared with the timed reception processing. It is possible to reliably prevent the system from going down even when the positioning reception process is executed.

Since it can be determined that the solar cell panel 80 is arranged outdoors by detecting the amount of power generated by the solar cell panel 80 with the voltage detection circuit 74, it is outdoors when the electronic clock 1 is arranged in an environment where it is easy to receive satellite signals. Can be determined. Therefore, it is possible to improve the probability of successful reception when the satellite signal is automatically received.

A pointer 26 for displaying the remaining battery level and a second sub dial 13 are provided, and the remaining battery level can be displayed at the start of reception. In this case, the user can know that the reception process was not executed because the battery level is low. Therefore, since the user can grasp the reason why the reception has failed, the battery can be charged to meet the reception conditions, and the convenience can be improved.
Since the display control unit 620 can display that the positioning reception is being performed and the time measurement reception is being performed by the pointer 26, the user can easily confirm the current reception mode.

Since the power supply unit 7 includes the solar cell panel 80 and the secondary battery 130, if the remaining battery level drops below each threshold value and the reception process cannot be executed, the user can use the solar cell panel 80. The secondary battery 130 can be charged by consciously generating electricity. Therefore, when the reception operation is performed again, the reception process can be executed if the remaining battery level is equal to or higher than each threshold value.

[Other Embodiments]
The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the gist of the present invention.
For example, the layout of the flat antenna 40, the bar antenna 150, the secondary battery 130, and the step motors 141 to 145 is not limited to the above embodiment. For example, as in the movement 2A shown in FIG. 21, the calendar small window 15 is formed at the position of 4 o'clock to 5 o'clock on the dial 11, and the calendar small window 15 and the flat antenna 40 are arranged so as to overlap in a plane. You may. Therefore, the flat antenna 40 is arranged in the range of 4 o'clock to 6 o'clock on the dial 11, and the secondary battery 130 is arranged in the range of 11 o'clock from the plane center position of the dial 11. The bar antenna 150 is arranged at the 9 o'clock position on the dial 11 as in the above embodiment. In this way, the flat antenna 40, the bar antenna 150, and the secondary battery 130 may be arranged so as not to overlap each other in a plane.
If the calendar small window 15 is formed at a position overlapping the flat antenna 40 in a plan view, the calendar can be passed through the notch 915 of the first magnetic resistance plate 91 and the notch 810 of the solar cell panel 80 from the calendar small window 15. The car 20 can be visually recognized. Therefore, in the solar cell panel 80, it is not necessary to form the opening 820 in addition to the notch 810, and the area of the solar cell can be increased accordingly. Further, in the first anti-magnetic plate 91, it is not necessary to form the notch 911 in addition to the notch 915, the processing can be reduced, and the anti-magnetic performance can be improved.

The cutouts 911 and 915 and the cut portion 916 of the first magnetic resistance plate 91 and the cutout portions 925 and the cut portion 926 of the second magnetic resistance plate 92 manufacture the first magnetic resistance plate 91 and the second magnetic resistance plate 92 by press working or the like. It may be formed at the same time, but it may be formed by notching or cutting after pressing the first anti-magnetic plate 91 and the second anti-magnetic plate 92.
Similarly, the notch 713 and the cut portion 714 of the first circuit board 710 and the notch 721 of the second circuit board 720 may be formed at the same time when the respective boards 710 and 720 are manufactured, but they may be cut or cut later. May be formed. The same applies to the notch 810 of the solar cell panel 80.
In short, the solar cell panel 80, the first anti-magnetic plate 91, the second anti-magnetic plate 92, and the first circuit board 710 need not be provided with a region that overlaps with the flat antenna 40 and the bar antenna 150 in a plan view, and each notch portion is required. The method of forming the cut portion and the cut portion is not particularly limited.

The arrangement position of the bar antenna 150 may be other than the 9 o'clock position of the dial 11, and may be the 12 o'clock position or the 6 o'clock position. The arrangement position of the bar antenna 150 is not limited to the 6 o'clock, 9 o'clock, and 12 o'clock positions, but the electronic clock 1 except for the 3 o'clock position where the bar antenna 150 cannot be arranged due to the winding stem 381. Positions in 90 degree increments (6 o'clock, 9 o'clock, 12 o'clock) are preferable. That is, the bar antenna 150 that receives the long-wave standard radio wave is directional and needs to be directed toward the radio tower (long-wave standard radio wave transmission station R). Here, if the bar antenna 150 is arranged at the position of the electronic clock 1 in 90 degree increments (6 o'clock, 9 o'clock, 12 o'clock), it is easy for the user of the electronic clock 1 to grasp the arrangement position of the bar antenna 150. .. Therefore, the user can also perform a manual reception operation of the standard radio wave by pointing the bar antenna 150 toward the radio tower, and can easily receive the standard radio wave.

Also in the movement 2A shown in FIG. 21, the step motors 141 to 145 and the pointer shafts 27 to 29 are arranged so as not to overlap the plane antenna 40 and the bar antenna 150 in a plane. Some motors of the step motors 141 to 145 are arranged so as to overlap the secondary battery 130 in a plane. Therefore, the same effect as that of the above embodiment can be obtained.

In the above embodiment, the pointer 26 normally indicates the day of the week, displays the voltage (remaining battery level) of the secondary battery 130 when the A button 36 is pressed, or displays the reception mode during the satellite signal reception process. However, a guideline or the like that constantly displays the remaining battery level of the secondary battery 130 may be provided. In this case, the user can be easily notified of the voltage drop of the secondary battery 130, and the user can be easily urged to charge the secondary battery 130 by the solar cell panel 80.

The electronic clock 1 is not limited to the one provided with the first sub dial 12 and the second sub dial 13, and the information displayed by the first sub dial 12 and the second sub dial 13 is also based on, for example, a chronograph pointer. The elapsed time may be used. The display of the reception mode is not limited to that performed by the pointer 26, and is displayed on the dial 11 and the dial ring 35 as "1" (measurement reception mode), "4+" (positioning reception mode), and "RC" (standard radio wave reception). The reception mode may be displayed by writing characters or symbols such as (mode) and instructing with the pointer 21. Similarly, the reception result may be indicated by the guideline 21.
Further, in the present embodiment, during the automatic reception process, the pointer 26 and the like may be set so as not to move to the position instructing the reception mode. This is because, at the time of automatic reception processing, the user often leaves the electronic clock 1 unattended and does not visually recognize the pointer 26. However, if the pointer 26 indicates the reception mode and the reception is in progress during the automatic reception process, the user can confirm the reception mode and the like even during the automatic reception process.

In the above-described embodiment and modification, the electronic clock includes a time display unit including a dial 11 and pointers 21 to 23, but the present invention is not limited thereto. The electronic clock may include a time display unit including a liquid crystal panel or the like. In this case, the drive body that drives the time display unit is configured to include a drive unit that drives the liquid crystal panel.
Further, in this case, the electronic clock only needs to have a time display function, and the time display unit does not have to be a display unit dedicated to the time display. Such electronic clocks include a pulse rate monitor that is attached to the user's arm to measure the pulse, and a GPS logger that is attached to the user's arm to measure and store the current position when the user runs. A wrist-type device can be exemplified.

The GPS satellite S has been described as an example of the position information satellite, but the present invention is not limited to this. For example, as the position information satellite, satellites used in other global navigation satellite systems (GNSS) such as Galileo (EU) and GLONASS (Russia) can be applied. In addition, geostationary satellites such as a geostationary satellite navigation augmentation system (SBAS) and satellites such as a regional satellite positioning system (RNSS) that can be searched only in a specific area such as a quasi-zenith satellite (Michibiki) can also be applied.
The type of standard radio waves that can be received is not the standard radio waves of the above-mentioned five countries, but only some standard radio waves may be receivable.

1 ... Electronic clock, 2, 2A ... Movement, 4 ... Standard radio wave receiving unit, 5 ... Satellite signal receiving unit, 6 ... Control display unit, 7 ... Power supply unit, 11 ... Dial, 12 ... First subdial, 13 ... 2nd sub dial, 15 ... Calendar small window, 20 ... Calendar car, 21 ... Pointer (second hand), 22 ... Pointer (minute hand), 23 ... Pointer (hour hand), 24 ... Pointer (minute hand), 25 ... Pointer (hour hand) ), 26 ... pointer, 27, 28, 29 ... pointer shaft, 30 ... exterior case, 31 ... case, 32 ... bezel, 33 ... cover glass, 34 ... back cover, 35 ... dial ring, 38 ... crown, 381 ... winding True, 382 ... Oscillator, 40 ... Flat antenna, 61 ... Control unit, 71 ... Charge control circuit, 72 ... 1st regulator, 73 ... 2nd regulator, 74 ... Voltage detection circuit, 80 ... Solar cell panel, 82 ... Electrode, 83 ... Amorphous silicon semiconductor thin film, 84 ... Back electrode, 91 ... First magnetic resistance plate, 92 ... Second magnetic resistance plate, 125 ... Main plate, 127 ... Wheel train receiver, 130 ... Secondary battery, 140 ... Drive mechanism, 141 ... First 1-step motor, 142 ... 2nd step motor, 143 ... 3rd step motor, 144 ... 4th step motor, 145 ... 5th step motor, 150 ... bar antenna, 151 ... antenna core, 152 ... coil, 400 ... standard radio wave Receiving circuit unit, 401 ... Standard radio wave receiving IC, 410 ... Filter crystal, 500 ... GPS receiving unit, 501 ... GPS-IC, 510 ... RF unit, 520 ... Base band unit, 530 ... Crystal oscillator circuit with temperature compensation circuit 540 ... Flash memory, 610 ... Time information correction unit, 620 ... Display control unit, 630 ... Voltage detection control unit, 640 ... Reception control unit, 710 ... First circuit board, 720 ... Second circuit board, 810 ... Notch , 820 ... Opening, 911 ... Notch, 915 ... Notch, 916 ... Cut, 925 ... Notch, 926 ... Cut, 711 ... Power control IC.

Claims (5)

A plane antenna for receiving satellite signals, a bar antenna for receiving standard radio wave signals, a time display unit having a plurality of pointers and a dial, a plurality of motors for driving the pointers, a battery, and a watch case. It is an electronic clock that is equipped
The flat antenna, the bar antenna, the plurality of motors, and the battery are arranged inside the watch case and at a position overlapping the dial in a plan view viewed from a direction orthogonal to the dial. The planar antenna, the bar antenna, and the battery are arranged at positions that do not overlap each other in the planar view.
The plurality of motors are arranged at positions where the flat antenna and the bar antenna do not overlap in the plan view.
An electronic watch comprising a first anti-magnetic plate and a second anti-magnetic plate arranged inside the watch case and at positions where the flat antenna and the bar antenna do not overlap in the plan view. A plane antenna for receiving satellite signals, a bar antenna for receiving standard radio wave signals , a time display unit having a plurality of pointer axes, a pointer attached to the pointer axis, and a dial, and a plurality of driving the pointer axes. An electronic watch equipped with a motor, a battery, and a watch case.
The flat antenna, the bar antenna, the plurality of motors, and the battery are arranged inside the watch case and at a position overlapping the dial in a plan view viewed from a direction orthogonal to the dial. The planar antenna, the bar antenna, and the battery are arranged at positions that do not overlap each other in the planar view.
The plurality of pointer axes are arranged at positions where the planar antenna and the bar antenna do not overlap in the planar view.
An electronic watch comprising a first anti-magnetic plate and a second anti-magnetic plate arranged inside the watch case and at positions where the flat antenna and the bar antenna do not overlap in the plan view. In the electronic clock according to claim 1 or 2.
A first circuit board on which a control IC for controlling the drive of the motor and a power supply control IC for controlling the power supply including the battery are mounted, which are arranged inside the watch case.
A second circuit board arranged inside the watch case and on which a flat antenna, a bar antenna, a receiving IC for receiving control by the flat antenna, and a receiving IC for receiving control by the bar antenna are mounted. An electronic clock characterized by being equipped with. In the electronic clock according to any one of claims 1 to 3.
The first anti-magnetic plate is arranged on the dial side with respect to the plurality of motors.
An electronic timepiece characterized in that the second anti-magnetic plate is arranged on the side opposite to the dial with respect to the plurality of motors. In the electronic clock according to any one of claims 1 to 4.
The planar antenna is an electronic clock characterized by being a patch antenna.

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