JP2005084037A - Radio-controlled watch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio-controlled watch capable of receiving a standard wave from a direction in a larger range. <P>SOLUTION: The axes of antennas 5A, 5B are arranged in a direction parallel to the tube axial direction of an exterior case 1. The driving coil 431A of a stepping motor 43A for a minute hand and the driving coil 431B of a stepping motor 43B for an hour hand are shared with the antennas 5C, 5D receiving the standard wave, and then are arranged in a direction perpendicular to the tube axial direction of an exterior case 1 and also in a mutually perpendicular direction with the driving coils 431A, 431B. The antennas 5A, 5B, 5C, 5D are respectively arranged along one direction from among three mutually perpendicular directions therewith, thereby one or a plurality of these antennas 5A, 5B, 5C, 5D can properly receive the standard wave. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a radio-controlled timepiece.

Some radio-controlled timepieces that receive a standard radio wave that includes time information and correct the time include one antenna arranged inside the watch case. (For example, patent document 1). In this radio-controlled timepiece, the antenna is a so-called bar antenna in which a coil is wound around an antenna core, and an induced voltage is generated in the coil when the magnetic field lines of standard radio waves cross the antenna core. A standard radio wave is received by this induced voltage.
The antenna having such a structure has directivity that the reception sensitivity is good when the directions of the antenna core and the magnetic field lines of the standard radio wave coincide with each other, but the reception sensitivity decreases in other directions.

JP 2001-33571 A (FIG. 1)

  Therefore, the radio-controlled timepiece with such a structure can receive standard radio waves when the axial direction of the arranged antenna is substantially perpendicular to the incoming direction of standard radio waves, but it is good in other directions. You may not be able to receive. For this reason, when receiving radio waves, it is necessary to place a clock in accordance with the direction in which standard radio waves enter. In particular, in the case of a portable timepiece, when receiving radio waves, care must be taken to place the timepiece in a direction in which standard radio waves can be received, and handling becomes complicated.

  An object of the present invention is to provide a radio-controlled timepiece that can receive radio waves in a wider range of directions.

  The radio-controlled timepiece of the present invention includes an antenna that receives a standard radio wave including time information, a control unit that measures the current time and corrects the current time based on the time information received by the antenna, and a control unit. And a time display means for displaying the current time measured, wherein at least three antennas are provided, and axes of the three antennas are arranged substantially perpendicular to each other.

According to the present invention, since the axes of the three antennas are arranged substantially perpendicular to each other, these three-direction antennas receive radio waves entering from directions substantially orthogonal to the antenna axes. Therefore, no matter which direction the standard radio wave enters from, any one or more of the three antennas will receive the standard radio wave. Reception performance is improved.
Here, when the axes of the antennas are arranged substantially perpendicular to each other, the axes intersect at a substantially right angle, or the plane including one axis is at a so-called twisted position, which is substantially perpendicular to the other axis. including. Further, the arrangement of the antenna axes substantially perpendicular to each other means that the angle formed by these axes is about 90 °, for example, 60 ° to 120 °, and more preferably. 75 ° to 105 °, more preferably 80 ° to 100 °.
For example, when the radio-controlled timepiece has a cylindrical outer case with at least one of both end faces in the cylindrical axis direction open, a plurality of antennas may be housed in the outer case. One or more of them may be arranged outside the outer case. Further, only a part of the antenna may be arranged inside the outer case.

In the present invention, it is preferable that a drive unit including a rotor, a stator that rotatably supports the rotor, and a coil connected to the stator is provided, and at least one of the antennas includes a coil. .
According to the present invention, since at least one antenna includes the coil of the driving means, the driving means rotates the rotor and receives the standard radio wave by the coil when the time is adjusted. Since the coil of the drive means also functions as an antenna, the number of parts is reduced and the manufacturing cost of the radio-controlled timepiece is reduced. This also promotes space saving and downsizing of the radio-controlled timepiece.
The driving means can be used as a driving means for an arbitrary mechanism of the radio-controlled timepiece such as a pointer driving mechanism in the case of an analog timepiece, and an alarm mechanism or a music box mechanism in the case of a digital timepiece.

  In the present invention, at least two drives having a cylindrical outer case in which at least one of both end faces in the cylinder axial direction is open, a rotor, a stator that rotatably supports the rotor, and a coil connected to the stator Preferably, two of the antennas are each provided with a coil, and the axis of the coil is disposed substantially perpendicular to the cylinder axis direction of the outer case and is disposed substantially perpendicular to each other. .

According to the present invention, since the coils of the two driving means also function as an antenna, the number of parts of the radio-controlled timepiece is further reduced, and the manufacturing cost is reduced. In addition, space saving and downsizing of the radio-controlled watch are further promoted.
In addition, since the axes of the coils of the two drive means are arranged substantially perpendicular to the cylinder axis direction of the exterior case, the dimensions of the exterior case in the cylinder axis direction are reduced, and the radio-controlled timepiece is reduced in thickness.

In the present invention, it is desirable that the control unit is configured to stop driving of the driving means when the antenna receives the standard radio wave.
According to the present invention, when the coil of the driving means also functions as an antenna, the control unit stops driving the driving means in the standard radio wave reception state of the antenna, so that the driving pulse is applied to the standard radio wave received by the coil. It is prevented from overlapping. Therefore, the reception of the standard radio wave by the coil is accurate and reliable. In addition, since the magnetic field around the antenna is not affected by electromagnetic noise due to the drive pulse at the time of reception, reception by the antenna is facilitated and the reliability of radio wave reception is increased.
As a method for stopping the driving of the driving means, any method such as a method that does not output a driving pulse from the control unit or a method that disconnects the electrical connection between the control unit and the coil with a switch or the like can be adopted. In particular, when driving of the driving means is stopped by not outputting a driving pulse, the power consumption of the radio-controlled timepiece is reduced.

In the present invention, it is preferable that a cylindrical exterior case having at least one of both end faces in the cylindrical axis direction is provided, and at least one of the antennas is substantially parallel to the cylindrical axis direction of the exterior case. .
According to this invention, since the axis of at least one antenna is arranged substantially parallel to the cylinder axis direction of the exterior case, at least one of the antenna end portions faces the opening surface of the exterior case. Therefore, when the magnetic lines of force enter from a direction substantially parallel to the cylinder axis direction of the outer case, the magnetic lines of force enter the antenna satisfactorily from at least one opening surface of the outer case, and radio wave reception is improved. Therefore, the sensitivity of the antenna becomes good and the acquisition of time information becomes more accurate.
Here, that the axis of the antenna is substantially parallel to the cylinder axis direction of the exterior case means that the angle formed by the axis of the antenna and the cylinder axis direction of the exterior case is about 0 °, for example, 0 ° or more and 30 °. Or less, more preferably 0 ° to 15 °, and further preferably 0 ° to 10 °.

In the present invention, a cylindrical exterior case in which at least one of both end faces in the cylindrical axis direction is open, and a lid provided on one end face side of the exterior case, the time display means has an antenna in between. It is desirable that a time display unit provided on the other end surface side of the outer case on the side opposite to the cover unit is provided, and at least one of the time display unit and the cover unit is made of a highly permeable metal material.
According to the present invention, since at least one of the time display unit and the lid is made of a highly permeable material, the highly permeable material is arranged on the axis of the antenna. Since the highly permeable material has an action of attracting the magnetic field of the standard radio wave, the magnetic field of the standard radio wave existing near the axial direction is attracted by the highly permeable material in addition to the magnetic field of the standard radio wave existing in the axial direction of the antenna. . Therefore, since more magnetic fields cross the antenna, the radio wave reception sensitivity of the antenna is improved. At this time, when the antenna is configured by winding the antenna coil around the antenna core, the end surface of the antenna core is at least one of the time display unit and the cover unit made of a highly permeable material. It is desirable that they are pressed. In this case, since the antenna core and the highly permeable material are continuous, the magnetic field attracted by the highly permeable material can be introduced into the antenna core satisfactorily and reliably.
In addition, since at least one of the time display unit and the cover unit is made of a metal material, the radio-controlled timepiece has a high-class appearance.

In the present invention, a cylindrical exterior case having at least one of both end surfaces in the cylindrical axis direction is provided, the time display means includes a pointer and a dial, and the exterior case includes the 12 o'clock direction of the dial and 6 A band made of a metal material is provided in the hour direction, and at least one axis of the antenna is arranged substantially parallel to a line connecting 3 o'clock and 9 o'clock of the dial, and the axis of the other antenna is It is desirable that it is disposed outside the side end of the band.
According to the present invention, since the axis of at least one antenna is arranged substantially parallel to the line connecting the 3 o'clock and 9 o'clock of the dial, the axis of the antenna does not intersect the band. That is, the standard radio wave reaches the both ends of the antenna satisfactorily without being shielded by the metal band, so that even if the band is made of metal, radio wave reception is good and reliable in this antenna.
In addition, since the axis of the other antenna is arranged outside the side end of the band, the metal band is not located in the vicinity of both ends of the antenna. Accordingly, even in this antenna, the standard radio wave reaches the center of the antenna satisfactorily, and radio wave reception is good and reliable.

In the present invention, four antennas are provided, three of these antennas are arranged substantially perpendicular to each other, and the axis of the remaining one antenna is arranged substantially parallel to the axis of the shortest of the three antennas. It is desirable that
According to the present invention, in addition to the three antennas arranged substantially perpendicular to each other, the remaining one antenna is arranged so as to be substantially parallel to the axis of the shortest antenna. The reception sensitivity of the antennas arranged along the line is improved, and the reception sensitivity of the short antenna is reinforced. For example, if a short antenna and the remaining antennas are connected in series, signals received by these antennas are added together, so that the reception sensitivity of the antenna in the direction is improved.

In the present invention, it is desirable that a cylindrical outer case having at least one of both end faces in the cylindrical axis direction is provided, and the outer case is made of a metal material.
According to the present invention, since the exterior case is made of a metal material, the radio-controlled timepiece has a high-quality appearance and the appearance is improved.

In the present invention, it is desirable that a battery for supplying power to the radio-controlled timepiece is provided, and a non-metallic member is disposed between the antenna and the battery.
According to the present invention, since the non-metallic member is disposed between the antenna and the battery, the standard radio wave reaches the both ends of the antenna well without being shielded by the battery. Therefore, the radio wave reception by the antenna is good.

In the present invention, the antennas are preferably connected in series with each other.
According to the present invention, since the plurality of antennas are connected in series with each other, even when the induced voltage due to the standard radio wave received by each antenna is weak, the necessary voltage is secured by adding the plurality of induced voltages. . Therefore, for example, even when the approach direction of the standard radio wave does not completely match the direction of any antenna, the standard radio wave can be received by adding the induced voltages generated by the respective antennas. Thereby, the receiving sensitivity of the antenna is improved.

In the present invention, the antennas are preferably connected in parallel to each other.
According to the present invention, since the antennas are connected in parallel to each other, the time can be adjusted using the standard radio waves accurately received by any one or a plurality of antennas. The probability of receiving is good.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the second embodiment and later described below, the same reference numerals are given to the same components and components having the same functions as those in the first embodiment described below, and description thereof will be simplified or omitted.

[First Embodiment]
A first embodiment of the radio-controlled timepiece of the present invention will be described with reference to FIGS.
FIG. 1 is a plan view of the first embodiment, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is a sectional view taken along line III-III in FIG.
The radio-controlled timepiece 100 is a wristwatch type and includes an outer case 1 having a ring shape (a short cylindrical shape with both end faces open) as shown in FIGS. 1, 2, and 3.
The outer case 1 is a ring-shaped metal member that is open at both end faces in the cylinder axis direction L1 that is the axial direction of the gear that drives each pointer (for example, the axial direction of the center wheel & pinion 444). It is made of steel or titanium alloy. The thickness of the outer case 1 is smaller than the diameter of the ring, and is formed to be 10 mm or less or 5 mm or less. Metal bands 101 and 102 are attached to attachment portions 11 and 12 provided at positions opposite to each other on the outer periphery of the outer case 1. Here, the direction in which one of the bands 101 and 102 is provided as viewed from the center point of the exterior case 1 is the 12 o'clock direction, and the direction in which the other of the bands 101 and 102 is provided is the 6 o'clock direction. In FIG. 1, the upper direction (the direction of the band 101) is the 12 o'clock direction, and the lower direction (the direction of the band 102) is the 6 o'clock direction.

  A winding stem 131 as an external operation means 13 is provided so as to penetrate the body portion of the outer case 1 from approximately 4 o'clock. One end of the winding stem 131 is located outside the outer case 1, and a crown 132 is provided at this one end. The other end of the winding stem 131 is located inside the outer case 1, and a kanuki 133 and a mandarin duck 134 are provided on the other end side. The cannula 133 engages with the thumb wheel 135 and pulls out the winding stem 131, so that the thumb wheel 135 moves in the axial direction of the winding stem 131 via the mandarin duck 134 and the cannula 133 to correct the needle position. The vehicle 45 is configured to be corrected.

As shown in FIGS. 2 and 3, the time display means 2 is provided on one opening surface side of the outer case 1, and the back cover (lid portion) 3 that closes the opening on the other opening surface of the outer case 1. Is provided.
The time display means 2 includes a dial (time display unit) 21 having a time display surface 211 that is substantially orthogonal to the cylinder axis direction L1 (the vertical direction in FIG. 1) of the exterior case 1, and the dial 21 And pointers 221 and 222 that rotate at the same time.
The dial 21 has a substantially disc shape and has an area for closing the opening surface of the outer case 1. The dial 21 is made of a highly permeable metal material. The time display surface 211 is provided outward so as to be visible from the outside, and numerals (not shown) representing the time are printed in an annular shape near the outer edge on the time display surface 211.

The pointer includes a minute hand 221 that indicates the minute and an hour hand 222 that indicates the hour. The pointers 221 and 222 are both made of a metal material such as brass, aluminum, and stainless steel. The minute hand 221 and the hour hand 222 are rotated on the time display surface 211 with the approximate center of the dial 21 as a rotation axis, and the time is indicated by indicating a number on the time display surface 211.
A windshield 23 is provided to face the dial 21 with the hands 221 and 222 therebetween. The windshield 23 has an area for closing the opening of the outer case 1. The windshield 23 is formed of a non-conductive and non-magnetic light-transmitting member, and is formed of, for example, inorganic glass or organic glass.
The back cover 3 is provided opposite to the dial 21 with a predetermined interval and has an area for closing the opening of the outer case 1. The back cover 3 is made of a highly permeable metal material.

  Between the dial 21 and the back cover 3 inside the outer case 1, a movement 4 having a timekeeping function, a plastic inner frame 14 for fixing the movement 4 to the outer case 1, and electric power are supplied to the movement 4. A battery 49 and antennas 5A, 5B, 5C, and 5D that receive standard radio waves (external wireless information) including time information are provided.

  The movement 4 includes a crystal unit 41 including a crystal unit 411, a circuit block (control unit) 42 having a control function, stepping motors (drive means) 43A and 43B for rotating the hands 221 and 222, and a stepping A train wheel 44 that transmits the power of the motors 43A and 43B to the hands 221 and 222, a date wheel 45 that indicates the date, and a base plate 46 and a train wheel receiver 47 that sandwich the train wheel 44 from the cylinder axis direction L1 of the exterior case 1. It is configured with.

The crystal unit 41 includes a crystal unit 411 for a reference clock. Further, a quartz resonator 412 for 60 kHz and a quartz resonator 413 for 40 kHz are provided as a tuning signal generating crystal resonator that is tuned to the frequency (60 kHz, 40 kHz) of a standard radio wave. The crystal oscillators 412 and 413 for generating the tuning signal are arranged in the direction of about 9 o'clock. The crystal unit 41 and the circuit block 42 are arranged in the direction of about 7 o'clock.
FIG. 4 shows a functional block diagram of the crystal unit 41 and the circuit block 42. FIG. 5 shows a block diagram of the circuit block 42 and the driving means.
The circuit block 42 includes a receiving circuit 421 that processes the standard radio waves received by the antennas 5A, 5B, 5C, and 5D and outputs the time information, a storage circuit 422 that stores the time information output from the receiving circuit 421, and a crystal The central control circuit 423 that counts the current time with the clock pulse from the vibrator 411 and corrects the current time with the received time information, the motor drive circuit 428 that drives the stepping motors 43A and 43B, and the needle that detects the pointer position A position detection circuit 429 and a switch circuit 40 that switches the electrical connection state of the reception circuit 421 and the motor drive circuit 428 with respect to the stepping motors 43A and 43B are provided.

The reception circuit 421 includes an amplification circuit that amplifies standard radio waves received by the antennas 5A, 5B, 5C, and 5D, a filter that extracts a desired frequency component, a demodulation circuit that demodulates a signal, a decoding circuit that decodes a signal, and the like. Configured.
The storage circuit 422 temporarily stores the time information decoded by the reception circuit 421 and compares the plurality of stored time information with each other to determine the success or failure of reception. Therefore, the external wireless information receiving unit 420 is configured by the antennas 5A, 5B, 5C, 5D, the receiving circuit 421, and the storage circuit 422.
The central control circuit 423 includes an internal time counter 425 that counts the internal time, a time data comparator 426 that compares the display time of the dial 21 with the time information of the standard radio wave, and a current time counter according to the received time information. An internal time correction control unit 427 that corrects the count value and a reception control circuit 424 that stores the reception schedule of the reception circuit 421 and controls the reception operation are provided.

The internal time counter 425 includes an oscillation circuit, a frequency divider, and a current time counter that counts the current time. The time data comparison unit 426 obtains the display time displayed on the dial 21 from the hand position detected by the hand position detection circuit 429, compares the time with the time information based on the standard radio wave, and compares the comparison result with the internal time correction control unit. To 427. The reception schedule stored in the reception control circuit 424 is set to perform a reception operation from 2 am to 2: 6 am. When the reception control circuit 424 is instructed to forcibly receive time information by an input operation using the external operation means 13, the reception circuit 421 performs a reception operation based on an output signal from the reception control circuit 424.
The motor drive circuit 428 applies drive pulses to the stepping motors 43A and 43B at a timing commanded from the central control circuit 423.
The hand position detection circuit 429 detects the hand positions of the hands (the minute hand 221 and the hour hand 222) and outputs the detection result to the central control circuit 423. In the central control circuit 423, the detection result from the hand position detection circuit 429 is compared with the counter value of the time counter. Based on the comparison result, the motor drive circuit 428 is instructed to output a motor pulse that matches the pointer position with the counter value.

The switch circuit 40 includes a first switch unit 401 that switches an electrical connection state between the stepping motors 43A and 43B and the reception circuit 421, and a second switch that switches an electrical connection state between the stepping motors 43A and 43B and the motor drive circuit 428. Means 402 and a switch control unit 403 for controlling the opening / closing operation of the first switch means 401 and the second switch means 402 are provided.
The first switch means 401 is provided between the stepping motors 43A and 43B and the reception circuit 421, and switches between the electrical continuity state and the electrical disconnection state of the stepping motors 43A and 43B and the reception circuit 42. As such a switch, for example, a mechanical switch that mechanically performs a switching operation, a non-contact switch using a diode or a transistor, or the like can be employed.
The second switch means 402 is provided between the stepping motors 43A and 43B and the motor drive circuit 428, and switches between the electrical continuity state and the electrical disconnection state of the stepping motors 43A and 43B and the motor drive circuit 428.

The switch control unit 403 controls the opening and closing of the first switch unit 401 and the second switch unit 402 in accordance with a command from the reception control circuit 424. When the reception control circuit 424 instructs the switch control unit 403 to start receiving standard radio waves, the switch control unit 403 turns the first switch means 401 on and the second switch means 402 off. That is, the stepping motors 43A and 43B and the receiving circuit 421 are electrically connected, and the stepping motors 43A and 43B and the motor driving circuit 428 are electrically disconnected.
Further, when a command to stop the reception processing operation in the reception circuit 421 is instructed from the reception control circuit 424 to the switch control unit 403, the switch control unit 403 sets the first switch means 401 to the OFF state and sets the second switch The means 402 is turned on. That is, the stepping motors 43A and 43B and the receiving circuit 421 are electrically disconnected, and the stepping motors 43A and 43B and the motor drive circuit 428 are electrically connected.

The driving means includes a minute hand stepping motor 43A for rotating the minute hand 221 and an hour hand stepping motor 43B for rotating the hour hand 222.
Stepping motors 43A and 43B generate magnetic force by drive pulses supplied from a motor drive circuit 428 and drive coils (antenna coils, coils) 431A and 431B that play the role of antennas 5C and 5D that receive standard radio waves, There are provided stators 432A and 432B excited by the drive coils 431A and 431B, and rotors 433A and 433B rotated by a magnetic field excited by the stators 432A and 432B.

The drive coils 431A and 431B are connected to the receiving circuit 421 with the first switch means 401 therebetween, and are connected to the motor drive circuit 428 with the second switch means 402 therebetween. When the first switch means 401 is in the ON state and the second switch means 402 is in the OFF state, the drive coils 431A and 431B receive standard radio waves together with the antennas 5A and 5B. That is, the standard radio wave signal is received in response to the magnetic field component of the standard radio wave intermingled with the drive coils 431A and 431B, and the received signal is sent to the receiving circuit 421 via the first switch means 401.
Further, when the first switch means 401 is in the OFF state and the second switch means 402 is in the ON state, the drive coil 431A drives the minute hand 221 and the drive coil 431B drives the hour hand 222. That is, the drive pulse from the motor drive circuit 428 applied to the drive coils 431A and 431B is electromagnetically converted to generate an induction magnetic field. This induction magnetic field is transmitted to the stators 432A and 432B, and the rotors 433A and 433B are rotated. The rotation of the rotors 433A and 433B is transmitted by the train wheel 44, and the minute hand 221 and the hour hand 222 are rotationally driven.

  The drive coils 431A and 431B are connected in series via a switch (not shown), and when receiving a standard radio wave, the switch is turned on. As shown in FIG. 6, the antennas 5A and 5B And connected in series. The standard radio waves received by the antenna coils 52A and 52B of the antennas 5A and 5B and the drive coils 431A and 431B are added in series and sent to the receiving circuit 421. When a drive pulse is applied from the motor drive circuit 428, the switch is turned off, and the drive coils 431A and 431B are driven independently.

The driving coil 431A of the stepping motor 43A and the driving coil 431B of the stepping motor 43B are arranged in a plane in which the axes X and Y are substantially perpendicular to the cylinder axis direction L1 of the exterior case 1, and in a planar arrangement, FIG. As shown, the axes X and Y are arranged so as to be substantially orthogonal to each other (the angle α at which the axes X and Y intersect is about 90 °).
The stepping motor 43A is disposed on the outer periphery of the movement 4 in the direction of approximately 11 o'clock. The stepping motor 43B is disposed on the outer periphery of the movement 4 in the approximately 8 o'clock direction.

The train wheel 44 transmits the rotation of the rotors 433A and 433B toward the hands 221 and 222, and the minute hand train wheel 44A connected to the second wheel 444 that rotates integrally with the minute hand shaft 442 to which the minute hand 221 is connected from the stepping motor 43A. And an hour hand wheel train 44B connected to the hour wheel 441 to which the hour hand 222 is connected from the stepping motor 43B.
The date wheel 45 is a gear that is held inside the outer case 1 by a main plate 46, a wheel train receiver 47, and a date wheel presser 451, and has an open center portion. The date wheel 45 is formed of a non-conductive and non-magnetic member, and is formed of, for example, plastic, inorganic glass, paper material, or the like. The date wheel 45 is meshed with a train wheel (not shown) connected from the hour wheel 441, and is rotated at a predetermined speed by the rotation of the hour wheel 441. The date wheel 45 is marked with letters representing the date facing the dial 21 (not shown). Note that a date window 212 is formed in the dial 21 so as to allow the characters of the date dial 45 to be visually recognized from the outside.

The main plate 46 supports the wheel train 44 on the dial plate 21 side, and the wheel train receiver 47 supports the wheel train 44 on the back cover 3 side. The main plate 46 and the train wheel bridge 47 are made of non-conductive and non-magnetic members, and are made of, for example, plastic or ceramics.
The wheel train 44, stepping motors 43 </ b> A and 43 </ b> B, and the circuit block 42 are sandwiched and integrated between the main plate 46 and the wheel train receiver 47 to constitute the movement 4.
The middle frame 14 is a ring-shaped member along the inner periphery of the outer case 1 and surrounds the peripheral end surface of the movement 4. The movement 4 is fixed inside the outer case 1 by the inner frame 14. The middle frame 14 is formed of a nonconductive and nonmagnetic member, and is formed of, for example, plastic or ceramics.

  The battery 49 is a primary battery or a secondary battery, and its outer can case is formed of a metal member. The battery 49 is arranged in the direction of approximately 2 o'clock and occupies a place from approximately 1 o'clock to approximately 3 o'clock. The battery 49 is housed in a holding case (not shown) made of a non-metallic material and fixed in the outer case 1.

The antenna is provided with an antenna 5A and an antenna 5B in addition to the drive coil 431A (antenna 5C) and the drive coil 431B (antenna 5D) described above, and both the antennas 5A and 5B are provided in the direction of about 5 o'clock. . The antennas 5A and 5B are arranged in the movement 4. The antenna 5A is disposed close to the inner periphery of the outer case 1, and the antenna 5B is disposed closer to the center of the movement 4 than the antenna 5A. However, the middle frame 14 is located between the antenna 5A and the outer case 1, and the antenna 5A and the outer case 1 are separated by a predetermined distance.
The antennas 5A and 5B are formed by winding coils (antenna coils) 52A and 52B around a high permeability material such as rod-shaped ferrite, pure iron, and amorphous metal to be the antenna cores 51A and 51B, as shown in FIG. In addition, the coil 52A of the antenna 5A and the coil 52B of the antenna 5B are connected in series with the drive coils 431A and 431B.

The antennas 5A and 5B have their axes Z5A and Z5B substantially parallel to the cylinder axis direction L1 of the outer case 1. The axis lines Z5A and Z5B of the antenna 5A and the antenna 5B intersect the dial plate 21 and the back cover 3 provided on the opening surface of the exterior case 1, and the intersection angle is about 90 °. The lengths of the antennas 5A and 5B in the axial direction are substantially the same as the distance between the main plate 46 and the train wheel bridge 47. Note that the dial 21 and the back cover 3 are preferably made of the same material as the antenna cores 51A and 51B in order to reduce the magnetic resistance when receiving the standard radio wave.
With such an arrangement, the antennas 5A and 5B, the drive coil 431A (antenna 5C), and the drive coil 431B (antenna 5D) have the axis Z5A of the antenna 5A and the axis Z5B of the antenna 5B substantially parallel to each other. The axis lines Z5A and Z5B of 5A and 5B, the axis line X of the antenna 5C, and the axis line Y of the antenna 5D are arranged substantially perpendicular to each other.
A date wheel 45 intersects the dial 21 side on the axis of the antenna 5A.
In the planar arrangement in FIG. 1, a crystal unit 41 and a circuit block 42 are located between the antennas 5A and 5B and the stepping motor 43B. The external operation means 13 is located between the antennas 5A, 5B and the battery 49.

The operation of the first embodiment having such a configuration will be described.
The current time of the time counter is updated by a reference clock generated by dividing the oscillation of the crystal oscillator 411. In addition, the position of the hands (the minute hand 221 and the hour hand 222) is detected by the hand position detection circuit 429, and the detection result is output to the central control circuit 423. The pointer position and the counter value of the time counter are compared, and the stepping motors 43A and 43B are driven via the motor drive circuit 428 based on the comparison result. The rotation of the rotors 433A and 433B by the driving of the stepping motors 43A and 43B is transmitted to the hands 221 and 222 by the wheel train 44, and the numbers on the time display surface 211 are instructed by the hands 221 and 222, so that the current time is Is displayed.

Next, a standard radio wave reception operation and a time correction operation based on standard radio time information will be described.
The standard radio wave is received by any one or a plurality of antennas 5A, 5B, 5C, 5D. Here, the standard radio wave is an electromagnetic wave, and includes an electric field fluctuation that vibrates in a direction perpendicular to the traveling direction of the radio wave, and a magnetic field fluctuation that vibrates in a direction perpendicular to the traveling direction of the radio wave and the electric field fluctuation. The magnetic field fluctuation passes through one or a plurality of openings of the coils 52A and 52B and the drive coils 431A and 431B of the antennas 5A, 5B, 5C, and 5D along the axis, so that the coils 52A and 52B, the drive coil 431A, An induced voltage is generated in one or more of 431B, and the standard radio wave is received.
Therefore, when receiving the standard radio wave, the antennas are received by the antennas of the antennas 5A, 5B, 5C, and 5D whose axis is substantially perpendicular to the traveling direction of the standard radio wave. That is, magnetic field fluctuations are mixed along the axis of the antenna in a direction substantially perpendicular to the traveling direction of the standard radio wave, and the standard radio wave is received. When standard radio waves are received by a plurality of antennas, the antennas 5A, 5B, 5C, and 5D are connected in series, so that signals received by the respective antennas are added in series and sent to the receiving circuit 421.

At 2:00 am, which is the reception start time set in the reception control circuit 424, a reception operation start command is output from the reception control circuit 424 to the reception circuit 421, the motor drive circuit 428, and the switch circuit 40. Alternatively, when a forced reception operation is input by the external operation means 13, a reception start command is output from the reception control circuit 424 to the reception circuit 421, the motor drive circuit 428, and the switch circuit 40. When receiving a signal from the reception control circuit 424, the motor drive circuit 428 stops the drive pulses to the drive coils 431A and 431B. When receiving a command to start reception, the switch control unit 403 turns on the first switch unit 401 and turns off the second switch unit 402. The drive coil 431A and the drive coil 431B are connected in series with the antennas 5A and 5B. In this state, the antennas 5A, 5B, 5C, and 5D receive standard radio waves.
When receiving a reception start command, the receiving circuit 421 receives power supply from the battery 49 and starts decoding signals (time information) received by the antennas 5A, 5B, 5C, and 5D.
The decoded time information is temporarily stored in the storage circuit 422, and the time information obtained by receiving a plurality of times (for example, six times) is compared before and after to determine the accuracy of reception. The current time of the time counter is corrected by the time correction circuit in accordance with the correctly received time information. Then, the hand position is corrected according to the time of the time counter, and the time according to the reception time is indicated.

  When the reception operation is completed, a reception completion command is output from the reception control circuit 424 to the motor drive circuit 428, the switch control unit 403, and the reception circuit 421. The reception circuit 421 receives the reception completion instruction and ends the reception processing operation. The switch control unit 403 receives the reception completion instruction and turns off the first switch means 401 and turns on the second switch means 402. To do. Further, the connection between the drive coil 431A and the drive coil 431B is cut, and each is driven independently.

According to such 1st Embodiment, there can exist the following effects.
(1) The antennas 5A and 5B have their axes Z5A and Z5B arranged substantially parallel to the cylinder axis direction L1 of the exterior case 1, and the antennas 5C and 5D have their axes X and Y substantially perpendicular to the cylinder axis direction L1. Has been placed. The antennas 5C and 5D are arranged so that their axes are substantially orthogonal to each other. Therefore, these antennas 5A, 5B, antenna 5C, and antenna 5D have the axis X, the axis Y, and the axes Z5A, Z5B arranged substantially perpendicular to each other. As a result, the standard radio wave can be received by any one of the antennas 5A, 5B, 5C, and 5D regardless of which direction the standard radio wave travels. Therefore, it is possible to receive standard radio waves in a wider range better than a conventional radio wave correction watch in which one antenna is arranged in the outer case.

  Further, this eliminates the need to adjust the orientation of the antennas 5A, 5B, 5C, and 5D in accordance with the traveling direction of the standard radio wave when receiving the standard radio wave, thereby improving the handleability of the radio wave correction watch 100. Since it is not necessary to match the antennas 5A, 5B, 5C, and 5D to the traveling direction of the standard radio wave, it is possible to receive radio waves even when the radio-controlled timepiece 100 is carried unlike the conventional case.

(2) Since the axes Z5A and Z5B of the antennas 5A and 5B are arranged substantially parallel to the cylindrical axis direction L1 of the exterior case 1, the magnetic field of the standard radio wave can enter without being shielded from the opening of the exterior case 1 at all. . Therefore, the receiving sensitivity of the antennas 5A and 5B can be improved. Since the reception sensitivity of the antennas 5A and 5B can be improved, sufficient reception strength can be ensured even if the antennas 5A and 5B are downsized. And the radio-controlled timepiece 100 can be downsized by downsizing the antennas 5A and 5B.

(3) Since the drive coils 431A and 431B of the stepping motors 43A and 43B also serve as the antennas 5C and 5D, the number of parts can be reduced, so that space saving in the outer case 1 can be promoted and the radio wave correction timepiece 100 can be reduced in size. Can be
Besides, when the standard radio wave is received by the switch circuit 40, the first switch means 401 is turned off and the second switch means 402 is turned on. Then, the drive pulse does not flow to the receiving circuit 421 but is applied only to the drive coils 431A and 431B. Therefore, since the electromagnetic conversion amount in the drive coils 431A and 431B can be accurately controlled, the rotation speed and rotation cycle of the rotors 433A and 433B can be accurately controlled, and the needle movement of the pointers 221 and 222 can be accurately controlled. Can do.
Furthermore, since the drive pulse from the motor drive circuit 428 is stopped when the standard radio wave is received, it is possible to reliably prevent the drive pulse from being superimposed on the standard radio wave intermingled with the drive coils 431A and 431B. As a result, the time information of the standard radio wave can be received accurately. In addition, since unnecessary driving pulses are not output, energy consumption can be reduced. Thereby, the replacement frequency of the battery 49 can be reduced, and the size reduction of the radio-controlled timepiece 100 can be promoted by making the battery 49 smaller.

(4) Since the back cover 3 and the dial 21 are made of a highly permeable material, these highly permeable materials can be disposed on the axes of the antennas 5A and 5B. Therefore, the magnetic field of the standard radio wave can be attracted by the back cover 3 and the dial plate 21, and many lines of magnetic force are mixed by the coils 52A and 52B of the antennas 5A and 5B, so that the reception sensitivity of the antennas 5A and 5B can be improved. .
In addition, since the back cover 3 and the dial 21 are made of a metal material, a high-quality feeling can be produced in the appearance of the radio-controlled timepiece 100, and the appearance can be improved.

(5) By configuring the exterior case 1 with a metal material, a high-class feeling can be produced, and the appearance of the radio-controlled timepiece 100 can be improved. Further, since the standard radio wave from the cylinder axis direction L1 of the outer case 1 can be received by the antennas 5A and 5B, even if the outer case 1 is made of a metal material, the reception sensitivity of the antennas 5A and 5B is not affected.
Further, since the inner frame 14 is made of a non-conductive and non-magnetic material, a predetermined distance is formed between the metal outer case 1 and the antennas 5A, 5B, 5C, 5D by the inner frame 14. The Therefore, even if the outer case 1 is made of metal, the standard radio waves can be satisfactorily received by the antennas 5A, 5B, 5C, and 5D without being shielded by the outer case 1.

(6) In a planar arrangement, a winding stem 131 is arranged between the antennas 5A and 5B and the battery 49. The battery 49 whose outer can case is made of metal may affect the radio wave reception of the antennas 5A, 5B, 5C, and 5D. The winding stem 131 is interposed between the antennas 5A, 5B, 5C, and 5D. Can be maintained at a predetermined distance or more. Therefore, the reception sensitivity of the antennas 5A, 5B, 5C, and 5D can be improved by eliminating the influence of the battery 49 on radio wave reception.
Further, since the battery 49 is held in a holding case made of a nonmetallic material, a nonmetallic member is disposed between the antennas 5A and 5B and between the drive coil 431A. Therefore, it is possible to satisfactorily prevent the standard radio wave from being shielded by the battery 49, and the standard radio wave can be received well by the antennas 5A and 5B and the drive coil 431A.

(7) The windshield 23, the base plate 46, the train wheel bridge 47 and the date wheel 45 are formed of non-conductive and non-magnetic members. Therefore, the standard radio wave is not shielded by these members in the cylinder axis direction L1 of the exterior case 1. As a result, the magnetic field fluctuation of the standard radio wave can enter the outer case 1 from the cylindrical axis direction L1 of the outer case 1, and the axes Z5A and Z5B of the antennas 5A and 5B are substantially parallel to the cylindrical axis direction L1 of the outer case 1. Therefore, standard radio waves can be received by the antennas 5A and 5B.

(8) The antennas 5A, 5B, 5C, 5D are connected in series. Therefore, the reception sensitivity can be increased by adding the induced voltages generated in the antennas 5A, 5B, 5C, and 5D due to the magnetic field fluctuation of the standard radio wave.

(9) The axis lines X and Y of the drive coils 431A and 431B of the stepping motors 43A and 43B are arranged at an angle of about 90 degrees. Therefore, mutual magnetic fluxes are unlikely to interfere with each other and do not interfere with the rotation control of the rotors 433A and 433B. As a result, the hands 221 and 222 are accurately moved.

[Second Embodiment]
Next, a second embodiment of the present invention will be described.
FIG. 7 shows a radio-controlled timepiece 100 according to the second embodiment. In FIG. 7, the hands of the radio-controlled timepiece 100 have hour hands 222, and the driving means also has a stepping motor 43B for hour hands. In this embodiment, the pointer has a minute hand as in the first embodiment, but the minute hand and its driving wheel train are not shown in FIG.

  The antenna is driven by the antennas 5A and 5B whose axis is substantially parallel to the cylinder axis direction L1 of the outer case 1, the antenna 5C disposed substantially perpendicular to the cylinder axis direction L1, and the stepping motor 43B serving as the antenna 5D. A coil 431B. The antennas 5A and 5B are disposed in the approximately 11 o'clock direction and the approximately 1 o'clock direction, respectively. Similarly to the antennas 5A and 5B, the antenna 5C is formed by winding a coil (antenna coil) 52C around a high permeability material such as a rod-shaped ferrite, pure iron, or amorphous metal that becomes the antenna core 51C. The antenna 5C is arranged in the direction of about 9 o'clock, and the axis X of the antenna core 51C is arranged substantially in parallel with a line connecting 12 o'clock and 6 o'clock. The axis X is disposed outside the side end portions (short-side end portions) of the bands 101 and 102.

The stepping motor 43B is disposed approximately in the 6 o'clock direction, and is disposed substantially parallel to the direction in which the axis Y of the drive coil 431B connects 3 o'clock and 9 o'clock.
Therefore, the angle α formed by the axis Y of the drive coil 431B and the axis X of the antenna 5C is about 90 °.
That is, the antennas 5A and 5B are disposed substantially parallel to each other, and the antennas 5A and 5B, the antenna 5C, and the antenna 5D are disposed substantially perpendicular to each other.
Further, as shown in FIG. 8, the coils 52A, 52B, 52C of the antennas 5A, 5B, 5C and the drive coil 431B of the antenna 5D are connected in series, and the coils 52A, 52B The drive coil 431B and the coil 52C are connected in parallel to each other.

According to such a second embodiment, in addition to the same effects as the effects (1) to (7) and (9) of the first embodiment, the following effects can be obtained.
(10) Since the coils 52A and 52B are connected in series, and the coils 52A and 52B, the coil 52C, and the drive coil 431B are connected in parallel, at least one of the antennas 5A, 5B, 5C, and 5D The time can be adjusted with the time information of the received standard radio wave. Therefore, the probability of successful reception can be improved.
Moreover, since the antennas 5A and 5B arranged substantially parallel to the cylinder axis direction L1 of the outer case 1 are connected in series with each other, the induced voltages generated by these antennas 5A and 5B can be added together. Therefore, the receiving sensitivity of the antennas 5A and 5B can be increased. Accordingly, the antennas 5A and 5B can be thinned or downsized in the cylinder axis direction L1, and the radio wave correction timepiece 100 can be reduced in thickness and size.

(11) Since the axis Y of the antenna 5D is arranged substantially parallel to the line connecting 3 o'clock and 9 o'clock, the axis Y is substantially parallel to the short direction of the metal bands 101 and 102, and the axis Y is The bands 101 and 102 are not arranged in the vicinity of both ends of the antenna core 51D without intersecting with the antenna 102. Further, since the axis X of the antenna 5C is disposed substantially parallel to the line connecting 12:00 and 6 o'clock, the axis X is substantially parallel to the longitudinal direction of the bands 101 and 102. Since the axis X is arranged outside the side ends of the bands 101 and 102, the axis X does not cross the ends of the bands 101 and 102, and the bands 101 and 102 are not arranged near both ends of the antenna core 51C. . Since the axes Z5A and Z5B of the antennas 5A and 5B are disposed substantially perpendicular to the longitudinal direction of the bands 101 and 102, they do not intersect the bands 101 and 102. Therefore, since the antennas 5A, 5B, 5C, and 5D are disposed at positions that do not intersect the bands 101 and 102, respectively, the influence of the bands 101 and 102 on the magnetic field can be suppressed to the minimum, and the standard radio wave can be received well. . On the contrary, the arrangement of the antennas 5A, 5B, 5C, and 5D allows the bands 101 and 102 to be made of metal without affecting the radio wave reception, thereby improving the appearance of the radio wave correction watch 100. And the types of bands 101 and 102 that can be applied can be increased.

It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
In the first embodiment, two of the antennas 5A, 5B, 5C, and 5D arranged substantially perpendicular to each other are the drive coils 431A and 431B of the stepping motors 43A and 43B. As in the embodiment, only the driving coil 431B of one stepping motor 43B may serve as the antenna 5D, or all the antennas may also serve as the driving coil of the stepping motor.
Moreover, the structure which the drive coil of a stepping motor does not serve as an antenna may be sufficient. In this case, if at least three antennas are arranged substantially perpendicular to each other, the standard radio wave can be received well, and the object of the present invention can be achieved. If the antenna is provided separately from the drive coil of the stepping motor, the number of turns of the coil and the wire diameter can be set separately according to the reception performance of the antenna and the drive performance of the drive coil. More appropriate reception performance and drive performance can be exhibited according to usage conditions.

The driving means is not limited to that used for driving the time display means, and can be used as driving means for any other mechanism such as an alarm mechanism by vibration or a music box mechanism.
The time display means is not limited to an analog type having a dial and a pointer, but may be a digital type having an electronic display panel.

The dial and the lid are made of a highly magnetically permeable material, but are not limited to this and may be made of a nonmagnetic material. In this case, since the dial and the lid do not affect the magnetic field of the standard radio wave, the magnetic field lines pass through the antenna coil well and the standard radio wave can be received accurately. Further, the appearance of the dial and the lid is improved if they are made of metal, but they are not necessarily made of metal. When the dial and the cover are made of a non-metallic material, the standard radio wave is not shielded, so that the antenna disposed between these members can receive the standard radio wave well. In short, it is sufficient that at least one of the dial and the lid is made of a highly permeable metal material.
The exterior case is not limited to a metal case, and any material can be adopted.

  A holding case made of a non-metallic material is arranged between the battery and the antenna. However, the present invention is not limited to this, and the train wheel and the external operation means may be made of a non-metallic member and arranged between them. . Also, even if a non-metallic material is not necessarily arranged between the battery and the antenna, the influence of the standard radio wave shielding by the outer can case of the battery is minimized as long as it has a distance of a predetermined dimension or more. Therefore, the object of the present invention can be achieved.

In each of the above-described embodiments, the antennas 5A and 5BB are disposed substantially parallel to the cylinder axis direction L1 of the outer case 1, and the angle formed between the axes Z5A and Z5B of the coils 52A and 52B and the cylinder axis direction L1 is about 0 °. However, if it is 0 ° or more and 45 ° or less, the axis Z intersects with the opening end of the outer case 1 so that the standard radio wave can be received well from the ends of the coils 52A and 52B.
In addition, the drive coils 431A and 431B have an angle formed by the axes X and Y of about 90 °. However, if the angle is 45 ° or more and 135 ° or less, the drive coils 431A and 431B Reception can be satisfactorily received by either or both of the drive coils 431A and 431B.

The antennas are not limited to being arranged so that their axis lines are substantially orthogonal to each other, and a plane including one straight line may be arranged so as to be substantially orthogonal to the other straight line. That is, the antenna axes may be twisted with respect to each other.
In addition, the arrangement direction of the axis of the antenna is such that one axis is substantially parallel to the cylinder axis direction of the outer case, or two axes are arranged in a plane substantially orthogonal to the cylinder axis direction of the outer case. Not limited to things. The number of antennas is not limited to four in the embodiment, and may be arbitrarily selected as long as it is three or more. In short, any antenna may be used as long as at least three antennas are arranged substantially perpendicular to each other. Therefore, when having four or more antennas, the three antennas may be arranged substantially perpendicular to each other, and the fourth or more antennas may be arranged along any one of these three directions. You may arrange | position in the direction different from three directions.

As shown in FIGS. 9 and 10, when the antenna axis is curved or bent by being bent at one or more places, the axis direction of the antenna is defined as follows: Is done.
In FIG. 9, the antenna 5 </ b> E is curved in an arc shape around the cylinder axis L <b> 1 of the exterior case 1. In this case, the axial direction A of the antenna 5E is a tangent at a position equidistant along the arc shape from the midpoint C of the antenna core 51E, that is, from both ends of the antenna core 51E. Therefore, radio waves in all directions can be satisfactorily received as long as this axis A is arranged so as to be perpendicular to the axes of at least two other antennas.

  In FIG. 10, the antenna 5E is bent at a plurality of locations (four locations in FIG. 10) in the exterior case 1, and is arranged so that the distance between each straight portion and the cylindrical axis L1 of the exterior case 1 is equal. Has been. The axial direction A of the antenna 5E is the midpoint C of the antenna core 51E, that is, the center and the midpoint of the outer case 1 at positions equidistant from the both ends of the antenna core 51E along the longitudinal direction of each straight line portion. The direction is perpendicular to the line connecting C. Therefore, radio waves in all directions can be satisfactorily received as long as this axis A is arranged so as to be perpendicular to the axes of at least two other antennas.

  The present invention can be used not only for a wristwatch-type radio-controlled timepiece but also for a table clock-type radio-controlled clock.

1 is a plan view showing a radio wave correction timepiece according to a first embodiment of the present invention. II-II sectional drawing of FIG. III-III sectional drawing of FIG. The figure which shows the functional block of a radio wave correction clock. The figure which shows the structure of the circuit block of a radio wave correction timepiece. The figure which shows the connection of the antenna in 1st embodiment. The top view which shows the radio wave correction timepiece concerning 2nd embodiment of this invention. The figure which shows the connection of the antenna in 2nd embodiment. The figure which shows the modification of the electromagnetic wave correction watch of this invention. The figure which shows another modification of the electromagnetic wave correction timepiece of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Exterior case, 2 ... Time display means, 3 ... Back cover, 4 ... Movement, 5A, 5B, 5C, 5D ... Antenna, 13 ... External operation means, 14 ... Middle frame, 21 ... Dial (Time display part) , 23 ... Windshield, 41 ... Quartz crystal unit, 42 ... Circuit block (control unit), 43A, 43B ... Stepping motor, 44 ... Wheel train, 45 ... Date wheel, 46 ... Ground plate, 47 ... Train train receiver, 49 ... Battery, 52A, 52B, 52C ... Coil (antenna coil), 100 ... Radio correction clock, 211 ... Time display surface, 221 ... Minute hand, 222 ... Hour hand, 411 ... Quartz crystal, 431A, 431B ... Drive coil (antenna coil, coil).

Claims (12)

An antenna for receiving a standard radio wave including time information;
A control unit for measuring the current time and correcting the current time based on the time information received by the antenna;
Time display means for displaying the current time measured by the control unit,
At least three antennas are provided,
The radio-controlled timepiece, wherein the three antenna axes are arranged substantially perpendicular to each other. The radio-controlled timepiece according to claim 1,
A driving means having a rotor, a stator that rotatably supports the rotor, and a coil connected to the stator;
At least one of the antennas is configured to include the coil. In the radio-controlled timepiece according to claim 1 or 2,
A cylindrical outer case in which at least one of both end faces in the cylindrical axis direction is opened;
A rotor, a stator that rotatably supports the rotor, and at least two drive means having a coil connected to the stator;
Two of the antennas are each provided with the coil,
The radio-controlled timepiece according to claim 1, wherein the axis of the coil is disposed substantially perpendicular to the cylinder axis direction of the outer case and is disposed substantially perpendicular to each other. The radio-controlled timepiece according to claim 2 or claim 3,
The radio-controlled timepiece, wherein the control unit is configured to stop driving of the driving means when the antenna receives a standard radio wave. The radio-controlled timepiece according to any one of claims 1 to 4,
A cylindrical exterior case having at least one of both end faces in the cylindrical axis direction opened,
The radio-controlled timepiece according to claim 1, wherein at least one axis of the antenna is substantially parallel to a cylinder axis direction of the exterior case. The radio-controlled timepiece according to any one of claims 1 to 5,
A cylindrical outer case in which at least one of both end faces in the cylindrical axis direction is opened;
A lid provided on one end face side of the outer case,
The time display means includes a time display unit provided on the other end surface side of the exterior case on the side opposite to the lid unit with the antenna in between,
At least one of the time display part and the lid part is formed of a highly permeable metal material. The radio-controlled timepiece according to any one of claims 1 to 6,
A cylindrical exterior case having at least one of both end faces in the cylindrical axis direction opened,
The time display means includes a pointer and a dial,
The outer case is provided with a band made of a metal material at 12 o'clock and 6 o'clock of the dial,
At least one axis of the antenna is arranged substantially parallel to a line connecting 3 o'clock and 9 o'clock of the dial,
The radio-controlled timepiece according to claim 1, wherein the axis of the other antenna is arranged outside a side end portion of the band. The radio-controlled timepiece according to any one of claims 1 to 7,
Four antennas are provided,
Three of these antennas are arranged substantially perpendicular to each other,
The radio-controlled timepiece according to claim 1, wherein the axis of the remaining one of the antennas is disposed substantially parallel to the axis of the shortest of the three antennas. The radio-controlled timepiece according to any one of claims 1 to 8,
A cylindrical exterior case having at least one of both end faces in the cylindrical axis direction opened,
This radio-controlled timepiece is characterized in that the outer case is made of a metal material.   10. The radio-controlled timepiece according to claim 1, further comprising a battery that supplies electric power to the radio-controlled timepiece, and a non-metallic member is disposed between the antenna and the battery. A radio-controlled watch characterized by that.   The radio wave correction timepiece according to any one of claims 1 to 10, wherein the antennas are connected in series with each other. 11. The radio wave correction timepiece according to claim 1, wherein the antennas are connected in parallel to each other.

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