JP2004029036A - Electronic timepiece - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic timepiece and apparatus that can generate power by using a power generation mechanism with an oscillating weight, and also receive radio information. <P>SOLUTION: There are provided the power generation mechanism 2 having an oscillating weight 21 and a generator for converting kinetic energy generated by the rotation of the an oscillating weight 21 into electrical energy, a timer for clocking time, and a reception mechanism having an antenna 6 for receiving the radio information. The antenna 6 is arranged outside in the radial direction of the an oscillating weight 21 more than the rotation locus of an outer circumferential edge of the an oscillating weight 21. <P>COPYRIGHT: (C)2004,JPO

Description

The present invention relates to an electronic timepiece and an electronic device, and more particularly, to an electronic timepiece and an electronic device including a power generating mechanism using a rotating weight and a receiving mechanism for receiving wireless information.

As an electronic device such as an electronic timepiece having a function of receiving wireless information, for example, a radio timepiece that receives time information transmitted wirelessly (standard radio wave) and corrects the time is known. Such a radio timepiece is usually driven by a battery, but since power is consumed for radio wave reception, there is a problem that the life of the battery is shorter than that of a normal timepiece and the frequency of battery replacement is increased.

For this reason, a radio timepiece in which a solar power generation device is incorporated as a power generation mechanism is known (for example, Patent Document 1).
A radio controlled watch equipped with this solar power generation device is configured to include a solar cell as a solar power generation device, a receiving mechanism having an antenna for receiving time information, and a timekeeping mechanism for measuring time. This is to correct the time of the clock mechanism according to the time information.
According to such a configuration, the clocking mechanism and the receiving mechanism can be driven using the power generated by the solar power generation. Therefore, a radio controlled watch that can be driven semi-permanently as long as the solar cell is generated and charged with light can be obtained.

By the way, solar power cannot be efficiently generated depending on conditions such as the amount of sunlight (for example, cloudiness or rain), the season (for example, winter), and the region (for example, a high latitude region), and power can be supplied. There is a problem that it may not be possible. A radio-controlled timepiece requires a large amount of power to process (amplify, demodulate, etc.) received time information by a receiving mechanism. For this reason, if sufficient power is not supplied to the receiving mechanism, the receiving sensitivity of the receiving mechanism is reduced, for example, the time information cannot be received or the time information is erroneously received. In addition, there is a problem that a solar cell cannot be rapidly charged when it is desired to charge it if the light is weak.
For these reasons, radio timepieces with a solar power generation mechanism have not always been convenient.

Therefore, the present inventor studied incorporating a power generating device using a rotary weight into a radio controlled watch. The power generating mechanism using the oscillating weight is configured to include a oscillating weight provided rotatably, and a generator for converting mechanical energy by the oscillating weight into electrical energy, and a rotor of the generator is rotated by the oscillating weight. It rotates and generates power with a power generating coil by a change in magnetic flux accompanying the rotation. According to such a configuration, for example, power can be generated by moving the rotary weight, for example, by attaching an electronic timepiece incorporating the power generation device to an arm. Therefore, compared with solar power generation, there is an advantage that power can be generated without being affected by conditions such as the season and the amount of sunshine, and rapid power generation can be easily performed.

JP-A-11-160464

By the way, in order to generate sufficient energy by the movement of the oscillating weight, the oscillating weight needs to have a sufficient moment of inertia. Therefore, as the material of the rotating weight, a metal having a large specific gravity (heavy metal) such as a tungsten alloy or a gold alloy is usually used. If such a power generating mechanism using a oscillating weight is simply incorporated into a radio-controlled timepiece, time information received by an antenna from a metal and conductive oscillating weight will be blocked. Therefore, when a power generation mechanism using a rotating weight is incorporated in a radio timepiece, a new problem that a standard radio wave cannot be received arises.
Such a problem is not limited to an electronic timepiece having a radio wave correction function, but is also a problem common to various electronic devices including a power generating device using a rotating weight and an antenna for receiving wireless information from the outside.

An object of the present invention is to solve the conventional problems and to provide an electronic timepiece and an electronic device capable of generating power by a power generating mechanism having a rotating weight and receiving wireless information.

An electronic timepiece according to the present invention includes a oscillating weight having a conductive material and a generator for converting mechanical energy due to rotation of the oscillating weight into electrical energy, a timekeeping mechanism for measuring time, and wireless information. A receiving mechanism having an antenna for receiving, wherein the antenna is provided radially outside the rotary weight with respect to a rotation locus of the outer peripheral edge of the rotary weight.
In other words, the antenna is provided radially outward with respect to the rotation trajectory of the outer peripheral edge of the rotating weight when the rotating weight rotates, not on the radially inner side, which is the rotation center side of the rotating weight. Therefore, assuming that the radius from the rotation center of the oscillating weight to the rotation locus of the outer periphery of the oscillating weight is the radius of gyration, the antenna is disposed apart from the center of rotation of the oscillating weight by the radius of rotation or more in the radial direction. .
Here, the power generation mechanism may be electromagnetic power generation or piezo power generation. Note that electromagnetic power generation is preferable because it is superior to piezo power generation in terms of energy conversion efficiency.

According to such a configuration, the mechanical energy generated by the rotation of the rotary weight is converted into electrical energy by the generator having the rotor and the power generation coil. The clocking mechanism and the receiving mechanism are driven by the electric power obtained by the generator. The wireless information is received by the antenna. For example, if the wireless information is a standard radio wave including time information, the time of the clock mechanism is corrected based on the time information.
Since the antenna is provided radially outward of the outer peripheral edge rotation trajectory of the rotating weight, the antenna and the rotating weight do not overlap each other in a planar manner regardless of the position of the rotating weight. Therefore, even when the rotating weight rotates while the wireless information is being received by the antenna, the wireless information (radio wave) is not interrupted by the rotating weight, and the wireless information can be reliably received by the antenna. it can. In the above, the wireless information is not limited to the time information, and may be, for example, news, weather forecast, and the like.
Therefore, the electronic timepiece of the present invention can receive wireless information, and can generate electric power by the rotating weight and the generator, so that it can generate electric power regardless of the weather and seasons, and can easily realize rapid electric power generation. An electronic timepiece with high convenience can be obtained. In addition, it is preferable that a speed increasing gear train is provided between the rotary weight and the rotor.

The rotating weight may be provided so as to be rotatable by 360 degrees or more, or may be provided so as to be rotatable within a range in which the central angle is restricted to a predetermined angle of less than 360 degrees. If the rotation angle of the oscillating weight is restricted within a predetermined range, the rotation locus of the antenna becomes small, so that the space where the antenna can be arranged in the timepiece is widened. Then, the degree of freedom of antenna arrangement is improved. Further, the distance between the antenna and the rotary weight can be increased, so that the receiving sensitivity at the antenna can be improved.

In the electronic timepiece of the present invention, it is preferable that the antenna and the power generation coil of the power generator are arranged to face each other with the rotation center of the rotary weight interposed therebetween in the radial direction of the rotary weight.

When the magnetic field generated by the power generation coil affects the antenna, the magnetic field may be superimposed on the antenna together with the wireless information, and a case where the wireless information cannot be accurately received by the antenna occurs. For this reason, processing such as receiving wireless information again is necessary, and the receiving efficiency is reduced. Therefore, it is preferable to arrange the antenna and the power generation coil as far apart as possible to reduce the influence of the magnetic field by the power generation coil. On the other hand, in order to reduce the size of the electronic timepiece provided with the oscillating weight, it is preferable to dispose each member such as the generator inside the rotation trajectory of the oscillating weight, and to dispose only the antenna outside that.
From these points, if the antenna and the power generation coil are arranged at positions facing each other with the rotation center of the rotary weight interposed therebetween, the antenna and the power generation coil can be arranged as far apart as possible, and the size of the electronic timepiece can be reduced. it can.

Here, when the central axis through which the interlinkage magnetic flux of the antenna passes and the central axis through which the interlinkage magnetic flux of the power generation coil of the generator passes is 60 degrees or more and 120 degrees when the antenna is projected on a plane including the power generation coil. It is preferred that they intersect at an angle less than or equal to degrees. In particular, it is preferable that the central axes of the antenna and the power generation coil intersect at approximately 90 degrees on a projection plane projected from the viewing direction of the time display unit.

Further, it is preferable that a central axis through which the linkage magnetic flux of the antenna passes intersects a plane including a center axis through which the linkage magnetic flux of the generator coil of the generator passes by an angle of 60 degrees or more and 120 degrees or less. . In particular, it is preferable that the intersection angle is approximately 90 degrees.

According to such a configuration, the influence of the magnetic field generated from the power generation coil on the antenna can be reduced, and erroneous reception by the antenna due to the magnetic field can be reduced. That is, the respective central axes of the antenna and the power generating coil intersect with each other within an angle range of 90 ° ± 30 ° on the projection plane, or the central axis of the antenna is 90 ° ± 30 ° with respect to a plane including the central axis of the power generating coil. When the antennas cross each other within an angle range of degrees, the antenna does not follow the magnetic flux lines from the power generation coil, so that the magnetic field from the power generation coil hardly interferes with the antenna, and erroneous reception at the antenna can be prevented.

Further, it is preferable that a magnetic field shielding unit that shields a magnetic field generated by the power generation coil from flowing into the antenna is provided between the antenna and a power generation coil of the power generator.
As the magnetic field shielding means, a device having at least one magnetic field shielding member made of a ferromagnetic material which is easy to attract and pass the magnetic force lines from the generator along the antenna can be used. The magnetic field shielding member is specifically made of iron, nickel, cobalt, or an alloy thereof (for example, a high magnetic permeability member such as permalloy).

According to such a configuration, since the magnetic field shielding means is arranged between the antenna and the power generation coil, the magnetic field (lines of magnetic force) from the power generation coil passes through the magnetic field shielding means (magnetic field shielding member) and is bypassed. Since the lines of magnetic force passing through the antenna can be reduced, the magnetic field shielding member functions as a magnetic field shield for the antenna, and can shield a magnetic circuit passing through the antenna. For this reason, when radio information is received by the antenna, power is generated by the power generation coil due to the rotation of the rotating weight, and even if a magnetic field is generated, the magnetic flux is likely to flow to the magnetic field shielding means closer to the power generation coil than the antenna. Become. Therefore, it is difficult for the magnetic field from the power generating coil to reach the antenna, and as a result, even relatively weak wireless information such as standard radio waves can be reliably received.

In addition, it is preferable that a stepping motor for driving a time indicating hand is provided, and the magnetic field shielding member of the magnetic field shielding means includes a coil core wound with a motor coil of the stepping motor.

Preferably, a secondary battery for storing the electric power generated by the power generation mechanism is provided, and the magnetic field shielding member of the magnetic field shielding means preferably includes a case of the secondary battery.

The magnetic field shielding member may be configured by newly providing a member for magnetic field shielding, but if a clock component such as a coil core of a motor or a case of a secondary battery is diverted, an increase in the number of components can be prevented. As a result, the receiving antenna and the generator can be brought close to each other, so that space can be saved, component costs can be reduced, and a decrease in productivity can be prevented.
In the case of a stepping motor or a secondary battery, there is no problem even if the magnetic flux flows through the coil core or the case, since it does not affect the driving of the motor or the operation of the secondary battery.
Here, the magnetic field shielding means may be composed of only one or more stepping motors, may be composed of only one or more secondary batteries, and may be composed of one or more stepping motors. It may be composed of one or more secondary batteries.
When two or more magnetic field shielding members such as a stepping motor and a secondary battery are provided, these magnetic field shielding members are preferably arranged along the antenna on the power generation coil side of the antenna. .

The antenna core of the antenna shields an external magnetic field that enters the watch body from outside the watch body before the stepping motor, and the antenna acts as a magnetic field shielding member for the stepping motor. Further, since the external magnetic field is shielded by the antenna, malfunction of the stepping motor can be suppressed.

In the electronic timepiece of the present invention, it is preferable that the wireless information is a standard radio wave including time information, and the electronic timepiece is a radio-controlled timepiece that receives the standard radio wave and corrects the time of the clock mechanism.

According to such a configuration, the time code of the wireless information is received by the receiving mechanism, and the time of the clocking mechanism is corrected based on the received time code. Thus, a radio controlled watch that automatically corrects the time automatically can be provided. In particular, since the standard radio wave is a relatively weak radio wave, if the rotating weight made of a conductive material overlaps the antenna in a plane, it is hardly possible to receive the signal. Since there is no overlap, reception can be performed reliably.
Note that the electronic timepiece of the present invention is preferably a portable timepiece that is usually carried by a user such as a wristwatch or a pocket watch and generates power by a rotating weight in accordance with the operation of the user, because power is generated by the rotating weight.

In the present invention, a case body formed of a non-conductive member that houses the power generation mechanism and the timing mechanism, and an external operation unit that protrudes outside the case body in a direction that intersects with a rotation axis direction of the rotating weight. Preferably, the antenna is arranged on the side of the external operation unit. Preferably, the external operating mechanism has a metal stem provided through the body of the case body, and the stem is preferably positioned on an extension of the axis of the antenna.

According to such a configuration, the standard radio wave is guided to the axis of the antenna by the winding stem of the external operation unit, and the interlinkage magnetic flux of the antenna increases, so that the receiving sensitivity of the antenna can be improved.
Further, it is preferable that the rotating weight in a state where the wireless information is received by the antenna is located at a position of the rotation locus which is most distant from the antenna. When mounting a timepiece, it is considered that the timepiece is often mounted with the winding stem protruding outside from the case body facing upward. When the winding stem is raised, the rotary weight moves downward at a position opposite to the winding stem. Therefore, the oscillating weight and the antenna are placed in a state where they are most separated from each other. Since the rotating weight and the antenna are separated, the standard radio wave reaches the antenna without being shielded by the rotating weight, so that the receiving sensitivity at the antenna can be improved. In particular, when setting the reception time of the standard radio wave to midnight, such as 2:00 am, there is a high possibility that the standard radio wave will be received while the clock is mounted. Is most distant, it is possible to improve the reception sensitivity of the antenna at the time of reception.

Here, it is preferable that the antenna has a flat shape having a coil wound around a flat shaft. With such a flat antenna, the antenna and the winding stem can be arranged on the same side.

According to the present invention, it is preferable that the antenna is curved along the outer periphery of the timepiece movement and is disposed along the outer periphery of the movement.

According to such a configuration, since the antenna follows the movement, the movement and the antenna are continuously integrated on the outer shape. Then, since the antenna does not protrude from the movement, the overall size is reduced and the design is improved.
Here, the antenna has an antenna core serving as a shaft core and an antenna coil wound around the antenna core, and the antenna core is formed by laminating a plurality of thin plate-shaped amorphous metals. preferable.
According to such a configuration, the amorphous metal is relatively easily bent, and is easily bent as compared with ferrite or the like. Therefore, the antenna can be bent along the outer periphery of the movement, and the design of the timepiece can be improved by aligning the antenna along the movement.

Alternatively, it is preferable that the movement includes a control circuit and a circuit seat formed of an insulating member mounting the control circuit, and the antenna be mounted on the circuit seat.
In such a configuration, since the antenna is mounted on the circuit seat, the antenna can be arranged close to the control circuit also mounted on the circuit seat. Then, since circuit wiring can be simplified, assemblability can be improved.

In the electronic timepiece of the present invention, it is preferable that the electronic timepiece further includes a case body formed of a non-conductive member that houses the power generation mechanism and the timekeeping mechanism, and at least a part of the antenna is embedded in the case body. Here, examples of the non-conductive member forming the case body include synthetic resin and ceramic.

According to such a configuration, the case body made of the synthetic resin does not shield the electromagnetic waves, so that the reception strength at the antenna can be ensured. Where the strength of the synthetic resin is weaker than that of metal, the strength of the case body can be reinforced by embedding the antenna in the synthetic resin. Further, by protecting the antenna with a synthetic resin, the corrosion resistance of the antenna can be improved. With a synthetic resin, the material cost is low, and the antenna can be molded while burying the antenna by injection molding, so that the production cost can be reduced.

In the electronic timepiece of the present invention, it is preferable that the rotation axis of the rotary weight and the center axis of the movement are eccentric to each other.

Here, that the rotation axis of the oscillating weight and the center axis of the movement are eccentric to each other means that the position of the rotation axis of the oscillating weight and the center position of the movement are different.
According to such a configuration, the torque applied to the rotating weight from the movement given to the electronic timepiece is larger than in the case where the rotating weight uses the center of the movement as the rotation axis. Therefore, the rotational energy generated by the rotation of the rotary weight increases, and as a result, the power generation performance of the generator is improved.
If the rotation axis of the oscillating weight is eccentric with respect to the center of the movement, the main plate of the movement remains radially outside the trajectory of the oscillating weight, and the antenna is disposed on the main plate outside the trajectory of the oscillating weight. Space can be provided. Then, since the antenna can be arranged on the base plate, assembly including the antenna arrangement is facilitated, and the production efficiency can be improved.
The ground plate is preferably formed of a non-conductive member such as a synthetic resin or ceramic, or a diamagnetic material such as brass or a gold alloy.
Here, it is preferable that the rotation center of the rotating weight and the rotation center of the hands indicating time are different. According to such a configuration, the timepiece can be made thin because the pointer axis of the hands and the rotation axis of the rotary weight do not overlap.

In the electronic timepiece of the present invention, it is preferable that the rotating weight and the antenna are separated from each other by a predetermined distance in a direction along a rotation axis direction of the rotating weight.

According to such a configuration, in addition to the fact that the antenna is located outside the rotation trajectory of the oscillating weight, there is also a distance between the antenna and the oscillating weight in the direction of the axis of rotation of the oscillating weight. Can be received by the antenna even in the traveling direction intersecting with. For example, if the antenna and the oscillating weight are arranged at the same height on a plane substantially orthogonal to the rotation axis of the oscillating weight, the antenna and the oscillating weight travel toward the antenna from the oscillating weight side while intersecting the rotation axis of the oscillating weight. Radio waves are blocked by the rotating weight before reaching the antenna. However, according to the present invention, the radio wave traveling from the rotary weight side crossing the rotation axis of the rotary weight can reach the antenna without being blocked by the rotary weight, and the antenna can receive the standard radio wave.

Here, when a back cover is provided on one end surface of the short cylindrical case body having both open end surfaces and a dial is provided on the other end surface, the rotating weight is disposed on the back cover side, and the antenna is a dial plate. It is exemplified to be arranged on the side.
According to such a configuration, the antenna and the rotary weight can be arranged at a fixed distance in the direction along the rotation axis of the rotary weight, and the radio wave can be received by the antenna without being shielded by the rotary weight.

At this time, it is preferable that the back cover is formed of a non-conductive member. Then, for example, it is preferable that the back cover is formed of inorganic glass such as sapphire glass having optical transparency and insulating properties, or organic glass such as polycarbonate and acrylic resin.
According to such a configuration, since the electromagnetic wave reaches the antenna without being shielded by the back cover, the antenna can receive the standard radio wave satisfactorily. If the back cover is made of glass, in addition to the non-conductive member not blocking electromagnetic waves, the aesthetic appearance can be improved by showing the internal structure of the timepiece by light transmission.

An electronic timepiece according to the present invention includes a power storage mechanism that stores power generated by the power generation mechanism, a drive mechanism that is driven by the power stored in the power storage mechanism, and is rotated by a driving force of the drive mechanism. It is preferable to have a time display indicator.

According to such a configuration, the electric power generated by the power generation mechanism from the rotation of the rotary weight is stored in the power storage mechanism. The driving mechanism is driven by the stored power to drive the hands for displaying time. Then, the current time measured by the clock mechanism is displayed by the hands. Further, a radio wave transmitted from a predetermined transmitting station, for example, a standard radio wave including time information is received by an antenna, and the time measured by the clock mechanism is corrected based on the received time information. Then, the pointer position is corrected by the drive mechanism according to the corrected time.

The electronic timepiece of the present invention has a mechanical energy storage mechanism that stores rotational energy generated by rotation of the rotary weight as mechanical energy, and transmits mechanical energy stored in the mechanical energy storage mechanism to the generator and It is preferable to include an energy transmission mechanism to which a time display hand is coupled, and a rotation control mechanism for controlling a rotation cycle of the generator.
Here, it is preferable that the rotation control mechanism is not limited to one rotation cycle, and can control the rotation cycle by switching a plurality of types of cycles.

According to such a configuration, energy generated by rotation of the rotary weight is stored in the mechanical energy storage mechanism. The energy stored in the mechanical energy storage mechanism is transmitted toward the hands by the energy transmission mechanism, and the time is displayed. The rotation control mechanism controls the rotation cycle of the generator by, for example, a time pulse measured by a time measurement mechanism. The generator is connected to the energy transmission mechanism, and the amount and timing of the energy transmitted from the mechanical energy transmission mechanism to the hands are controlled by controlling the rotation of the generator by the rotation control mechanism. Then, the rotation of the hands becomes a fixed period in synchronization with the timing, and the current time is displayed. Also, by controlling a plurality of types of periods, a multi-function display such as a chronograph and a timer can be produced. Then, the position of the hands is corrected based on the time information included in the wireless information received by the antenna, whereby accurate time display is performed.

Here, the generator is rotated by mechanical energy due to the rotation of the oscillating weight, and a pair of rotor disks arranged at predetermined intervals in a direction substantially orthogonal to a plane including the antenna core of the antenna, A magnet disposed opposite to each other on the opposing surfaces of the rotor disk, and a power generating coil disposed between the rotor disks with an axis substantially perpendicular to a plane including the antenna core of the antenna. And it is preferable to comprise.

According to such a configuration, the magnetic field generated from the generator coil of the generator is substantially orthogonal to the antenna core of the antenna. Therefore, the magnetic flux from the power generation coil does not follow the antenna core of the antenna, and the magnetic field from the power generation coil hardly interferes with the antenna. As a result, wireless information can be satisfactorily received by the antenna.

Here, it is preferable that the generator is arranged inside the movement and the antenna is arranged on the outer periphery of the movement. According to such a configuration, the external magnetic field from outside the clock body is shielded by the antenna core of the antenna and does not reach the generator. Then, the anti-magnetic performance is improved, and the rotation of the generator is not affected by the external magnetic field, and the time is accurately displayed by the hands.

Here, it is desirable that a wristwatch band made of a conductive material be provided, and that the projection images of the antenna and the wristwatch band be separated from each other when projected from the time viewing direction.
According to such a configuration, since the antenna and the wristwatch band do not overlap with each other, a radio wave linked to the antenna can be secured, and the reception sensitivity of the antenna can be maintained high. If the wristwatch band is made of a conductive material, the radio wave will be attracted to the watch band, but if the watch band and the antenna do not overlap, even if the radio wave is drawn to the watch band, the antenna chain The influence on the magnetic flux can be reduced.

The electronic device of the present invention includes a power generating mechanism having a oscillating weight and a generator for converting mechanical energy due to rotation of the oscillating weight into electrical energy, and a receiving mechanism having an antenna for receiving wireless information; Is preferably provided radially outward of the rotary weight relative to the rotation locus of the outer peripheral edge of the rotary weight.

According to such a configuration, the mechanical energy generated by the rotation of the rotary weight is converted into electric energy by the power generation coil. The electronic device can be driven by the power obtained by the power generation mechanism. The wireless information is received by the antenna. For example, if the wireless information includes time information, the time is displayed based on the time information. If the wireless information is news, the news is displayed.
Since the antenna is provided radially outward of the rotary weight relative to the rotation trajectory of the outer peripheral edge of the rotary weight, the antenna and the rotary weight do not overlap in a plane regardless of the position of the rotary weight. Therefore, even if the rotating weight rotates while receiving the wireless information with the antenna, the wireless information can be received by the antenna without being interrupted by the rotating weight.
In the above, the wireless information is not limited to time information and news, but may be various kinds of information such as a weather forecast and train timetable information.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(1st Embodiment)
FIG. 1 shows a wristwatch-type radio timepiece as a first embodiment of the electronic timepiece of the present invention. FIG. 1 is a plan view of the radio timepiece with its back cover removed. FIG. 2 is a sectional view of a main part of FIG. The upper part of the drawing in FIG. 1 is the direction of 6:00, the lower part of the drawing in FIG. 1 is the direction of 12:00, and the right direction of the drawing in FIG.
The radio-controlled timepiece 1 includes a main body case 7, a clock movement 100 disposed inside the main body case 7, and an antenna 6 for receiving a standard radio wave including time information as wireless information.

The main body case 7 has a substantially ring shape and is formed of a non-conductive material such as ceramic or synthetic resin, or a diamagnetic material such as brass, gold, or a gold alloy. At the opposite positions on the outer periphery of the main body case 7, mounting portions for mounting the wristband 77 are formed.
A time display section 76 is provided on one end surface side of the main body case 7, and a non-conductive glass (such as sapphire glass) is fitted as a windshield 75 from the outside of the time display section 76 (FIG. 2). The time display unit 76 includes a dial 761 mounted in a ring of the main body case 7, and hands (not shown) that rotate on the dial 761.
A substantially circular concave portion 71 is formed by the back surface of the substantially circular dial 761 and the inner wall of the main body case 7. The concave portion 71 is open toward the opposite side of the time display section 76, and the timepiece movement 100 is provided in the concave portion 71. As shown in FIG. 2, the concave portion 71 is closed by a back cover 74. It is desirable that the dial 761 and the back cover 74 have a portion formed of a non-conductive member (ceramic, synthetic resin, or the like).

As shown in the cross-sectional view of FIG. 2, a storage space 72 for storing the antenna 6 is formed in the main body case 7 so as to extend through the main body case 7 in a hollow shape. The storage space 72 and the recess 71 communicate with each other through a communication path, and wiring from the antenna 6 can be connected to the movement 100.
An external operation mechanism 73 is provided substantially at 3 o'clock side of the main body case 7. As the external operation mechanism 73, a crown 731 provided so that the position can be set in three stages of a 0th stage, a 1st stage, and a 2nd stage, and a first switch 732 provided on the opposite side with the crown 731 therebetween. And a second switch 733.

The movement 100 for a timepiece includes a power generation device 2 as a power generation mechanism, a secondary battery 3 for storing power generated by the power generation device 2, a driving unit 4 driven by using the secondary battery 3 as a power supply, and a quartz oscillator. The circuit block 5 includes a circuit block 5 on which a control IC 51 and a control IC 52 are mounted, and a base plate 81 and a train wheel receiver 82 which hold and integrate these components.

The power generating device 2 includes a rotating weight 21 whose center of rotation is rotatably supported on a movement 100 via a ball bearing by a semicircular plate, and power transmission for transmitting mechanical energy by rotation of the rotating weight 21 through a gear train. And a power generator that generates electric power by the power transmitted by the power transmission unit 22. This power generator is a general power generator including a power generation rotor 23 rotated by the power transmitted by the power transmission unit 22, a power generation stator 24 (using permalloy material), and a power generation coil 25.

The oscillating weight 21 is formed of a substantially semicircular conductive member in which the center of rotation and the center of gravity are eccentric. Specifically, as shown in FIG. 2, a thin plate-shaped arm portion 21A having a rotating shaft portion is provided. And a weight portion 21B fixed to the outer peripheral portion of the arm portion 21A. The weight portion 21B is formed of a material having a large specific gravity, such as a tungsten alloy or a gold alloy, and generates sufficient energy for power generation by rotation. The arm 21A and the weight 21B may be integrally formed.
The power generation rotor 23 is composed of a circular magnet having two or more poles.
The secondary battery 3 has a conventionally known configuration, and its case (outer can) is formed of a ferromagnetic metal. As a ferromagnetic material forming the case (outer can), for example, SUS304 or the like is used.

The driving unit 4 includes a hand driving motor 41 that is a stepping motor for driving a hand (not shown) of the time display unit 76 and a wheel train unit 42 that transmits the power of the hand driving motor 41 to the hands. It is provided with.
The pointer driving motor 41 includes a motor coil 411 wound around a rod-shaped coil core 415, a plate-shaped motor stator 412 transmitting an induced magnetic field from the motor coil 411, and a stator hole portion of the motor stator 412. And a motor rotor 413 that is rotatably arranged and rotated by an induced magnetic field. The rotor magnet 414 of the motor rotor 413 uses a rare earth magnet magnetized to two or more poles, and for example, desirably uses a samarium-cobalt-based magnet. The motor rotor 413 is engaged with the wheel train 42.
The rod-shaped coil core 415 and the plate-shaped motor stator 412 of the pointer driving motor 41 are formed of a high magnetic permeability member such as a permalloy material.
The gear shaft of the gear train of the train wheel portion 42 is mainly formed of a steel material such as carbon steel or stainless steel.

The circuit block 5 includes a crystal unit 51 that oscillates at a constant cycle, a control IC 52, and the like.
The quartz oscillator 51 includes a quartz oscillator 511 for clocking a reference clock and a quartz oscillator 512 and 513 for generating a tuning signal for tuning to the frequency of the standard radio wave. In Japan, for example, two quartz oscillators 513 for tuning to a standard radio wave of 60 kHz and a quartz oscillator 512 for tuning to a standard radio wave of 40 kHz are provided in Japan. In Europe and the United States, for example, a 60 kHz crystal unit and a 77.5 kHz crystal unit are used.
A control IC (Integrated Circuit) 52 divides the frequency from the crystal oscillator 51 to generate a reference clock, a time counting circuit that counts the reference clock and counts time, and a control circuit from the time counting circuit. It is provided with a control circuit for controlling the pointer driving motor 41 based on the signal, a receiving circuit for processing (amplifying and demodulating) the time information received by the antenna 6, and the like. The control IC 52 may share a possible circuit portion, or may be configured as software using a computer or the like instead of an analog circuit. Here, a timekeeping mechanism is configured to include the crystal oscillator 51, the frequency dividing circuit, and the timekeeping circuit.

The base plate 81 is a non-conductive member (for example, using plastic) or a diamagnetic material (for example, using brass) formed in a substantially disk shape. It is screwed on the plate 761. Then, the power generation device 2, the secondary battery 3, the driving unit 4, the crystal unit 51, and the circuit block 5 are mounted on the base plate 81.
The train wheel receiver 82 is provided on the back cover 74 side. The power generation device 2, the secondary battery 3, the driving unit 4, the crystal unit 51, and the circuit block 5 are sandwiched between a base plate 81 and a train wheel receiver 82. Note that the train wheel receiver 82 is made of the same material as the main plate 81.

The antenna 6 includes a rod-shaped antenna core 61 made of ferrite, and an antenna coil 62 wound around the antenna core 61. The antenna 6 is stored in a storage space 72 of the main body case 7. The time information (wireless information) received by the antenna 6 is output to a receiving circuit of the control IC 52, where signal processing is performed. Here, a receiving mechanism is constituted by the antenna 6 and the receiving circuit of the control IC 52.
As the time information received by the antenna 6, for example, a long-wave standard radio wave (JJY) can be used.

Next, the layout of the configuration of the radio timepiece 1 will be described.
The antenna 6 is disposed radially outward of the rotary weight 21 with respect to the rotation locus of the outer peripheral edge of the rotary weight 21. In other words, the antenna 6 is arranged such that the distance L from the center of rotation O to the inner surface on the side of the center of rotation O of the antenna 6 is larger than the radius of rotation R from the center of rotation O to the locus of rotation of the rotary weight 21. Have been. In the present embodiment, the antenna 6 is arranged such that a gap having a dimension W is formed between the antenna 6 and the rotary weight 21.
When the radio-controlled timepiece 1 is viewed in a plan view from the back cover 74 side, as shown in FIG. 1, the antenna 6 has a central axis 6A of the antenna 6, that is, They are arranged to intersect at an angle θ1 of about 90 degrees.

When the watch band 77 is formed of a conductive material such as SUS (stainless steel), a titanium alloy, a gold alloy, or brass, the positional relationship between the antenna 6 and the watch band 77 does not overlap in a planar manner. It is desirable to be arranged in. In such a configuration, if the watch band 77 is made of a conductive material, the standard radio wave is also drawn to the watch band 77, but since the watch band 77 and the antenna 6 do not overlap, the watch band 77 The influence on the linkage magnetic flux of the antenna 6 can be reduced.

In a planar arrangement, the secondary battery 3 and the pointer driving motor 41 are disposed between the antenna 6 and the power generation coil 25. The case of the secondary battery 3 and the coil core 415 of the motor 41 function as a magnetic field shielding member for preventing the magnetic flux generated from the power generation coil 25 from flowing to the antenna 6, and the magnetic field shielding means includes these two members. Have been.
That is, in the present embodiment, the magnetic field shielding means is mainly composed of the case of the secondary battery 3 and the coil core 415 of the motor 41, but the train wheel section 42 arranged between the antenna 6 and the power generation coil 25, A gear train such as the power transmission unit 22 and a metal part such as the rotary weight 21 are also included in the magnetic field shielding unit.
It should be noted that the magnetic field shielding member (magnetic field shielding means) is disposed between the antenna 6 and the power generation coil 25 when compared with a magnetic circuit in which a magnetic field generated by the power generation coil 25 is closed through the antenna 6. This means that the circuit length of the magnetic circuit closed through the shielding member is shorter. That is, the distance between the two ends of the magnetic field shielding means including the secondary battery 3 and the pointer driving motor 41 is shorter than the distance between both ends of the power generating coil 25 and both ends of the antenna 6. Means that.
Here, it is desirable that both ends of the coil core 251 (using permalloy material) of the power generation coil 25 be arranged along the outer periphery of the main plate 81. Accordingly, the total length of the rod-shaped coil core 251 can be increased, so that the number of turns of the coil can be increased and the power generation performance can be improved. When the antenna 6 and the power generation coil 25 intersect at an angle θ1 of approximately 90 degrees, a malfunction during reception can be prevented even if the total length of the coil core 251 becomes long.

In such a configuration, when the radio-controlled timepiece 1 is mounted on the arm and the arm is shaken, the rotating weight 21 rotates. Then, mechanical energy due to the rotation of the rotary weight 21 is transmitted to the power generation rotor 23 via the gear train of the power transmission unit 22, and the power generation rotor 23 is rotated. When the power generation rotor 23 rotates, a magnetic field fluctuates in the power generation stator 24, and the fluctuation of the magnetic field generates an induced current in the power generation coil 25. This induced current is stored in the secondary battery 3. The stored power drives the crystal oscillator 51, the control IC 52, and the pointer driving motor 41.

An oscillation signal output when a voltage is applied to the crystal unit 51 is frequency-divided by a frequency dividing circuit on the control IC 52 to generate a reference signal. Based on the reference signal, a time measurement on the control IC 52 is performed. The time is measured by the circuit, the pointer driving motor 41 is driven, and the motor rotor 43 is rotated. The rotation of the motor rotor 43 is transmitted to the hands by the wheel train 42, and the time is displayed.
When the antenna 6 receives the time information, the time measured by the clock circuit on the control IC 52 is corrected based on the time information, and the corrected time is indicated by the hands.

Next, the operation of the radio-controlled timepiece 1 will be described.
As the operation modes, there are three modes: a time display mode at the 0th crown, a manual time correction mode at the 1st crown, and a pointer 0 position correction mode at the 2nd crown.
In the time display mode at the 0th crown, the current time is normally displayed. In this state, when the first switch 732 is pressed for 2 seconds or more, the mode shifts to the standard radio wave forced reception mode, and the standard radio wave is received. When the reception is completed, the time is adjusted according to the received time information, and thereafter, the operation shifts to normal hand operation. Even if the reception of the standard radio wave is not successful, the operation shifts to the hand operation according to the normal current time counter. When the second switch 733 is pressed, the mode shifts to the reception confirmation mode. In the reception confirmation mode, if the reception was successful within the last several hours, the second hand is moved to the 30-second position (indicating "6" on the dial 761) as a signal of successful reception. If the reception has not been successful, the movement of the hands is stopped. The reception confirmation mode is performed for 5 seconds, and thereafter, the operation shifts to the normal hand operation.

In the time manual correction mode of the first stage of the crown, when the first switch 732 is pressed once, the second hand is fast-forwarded by one division, and when the first switch 732 is continuously pressed for a predetermined time, the second hand is fast-forwarded with a pulse of 128 Hz. . When the second switch 733 is pressed once, the minute hand is fast-forwarded by one division, and when the second switch 733 is continuously pressed for a predetermined time, the minute hand is fast-forwarded with a pulse of 128 Hz.
In the second position of the crown, when the first switch 732 is pressed, the second hand is reset to zero. When the second switch 733 is pressed, the minute hand is returned to zero.

According to the first embodiment having such a configuration, the following effects can be obtained.
(1) Since the antenna 6 is disposed apart from the rotation center O of the oscillating weight 21 by the radius of rotation R of the oscillating weight 21 or more, the oscillating weight 21 can be placed in the antenna no matter where the oscillating weight 21 rotates. 6 does not overlap in a plane. Therefore, no matter where the oscillating weight 21 is located, the time information that enters the antenna 6 is not blocked, so that the antenna 6 can receive the time information regardless of the position of the oscillating weight 21. That is, the time information can be received by the antenna 6 while the power generation device 2 having the rotating weight 21 generates power.

(2) The antenna 6 is arranged such that the central axis 6A of the antenna core 61 of the antenna 6 intersects with the central axis 25A of the power generation coil 25 at an angle θ1 of approximately 90 degrees. Therefore, even if the rotating weight 21 rotates and a magnetic field is generated from the power generation rotor 23 while the antenna 6 is receiving the time information, the magnetic flux of the magnetic field and the antenna coil 62 of the antenna 6 are substantially orthogonal. Therefore, the magnetic flux of the magnetic field is not easily superimposed on the antenna 6. As a result, the influence of the magnetic field from the power generation coil 25 on the antenna 6 can be reduced, erroneous reception can be eliminated, and the reception sensitivity of the antenna 6 can be improved.

(3) Since the magnetic field shielding members such as the secondary battery 3 and the pointer driving motor 41 are disposed between the antenna 6 and the power generation coil 25, the magnetic flux of the magnetic field generated from the power generation coil 25 6 before passing through the secondary battery 3, the pointer driving motor 41, and the like, it is easy to form a closed loop that returns to the power generation coil 25 again. In particular, since the coil core 415 of the pointer driving motor 41 and the motor stator 412 are formed of a high magnetic permeability material such as a permalloy material, more magnetic flux passes through this high magnetic permeability medium, and the magnetic flux flowing toward the antenna 6 is increased. Can be reduced. Therefore, the magnetic field from the power generation coil 25 hardly reaches the antenna 6, so that the influence of the magnetic field from the power generation coil 25 on the antenna 6 can be reduced, and the reception sensitivity of the antenna 6 can be further improved. Since the shafts of the gears such as the power transmission unit 22, the wheel train unit 42, and the rotary weight 21 are formed of a steel material such as carbon steel or stainless steel, the magnetic field from the power generation coil 25 can be generated by such a steel material. Can be shielded from reaching the antenna 6.
These magnetic field shielding members function as parts of the radio-controlled timepiece 1, and there is no need to incorporate new magnetic field shielding parts, and the antenna 6, the secondary battery 3, the pointer driving motor 41, and the power generation coil 25 Since only a planar layout needs to be adjusted, an increase in the number of parts can be suppressed, and an increase in cost and a decrease in productivity can be prevented.

(4) Since the antenna core 61 is formed of ferrite, which is a magnetic material, a magnetic field that enters the radio timepiece 1 from the outside is attracted to the antenna core 61 and does not enter the radio timepiece 1. Therefore, it is possible to prevent the external magnetic field from entering the inside of the magnetic circuit of the pointer driving motor 41 and prevent the pointer driving motor 41 from malfunctioning due to the external magnetic field.

(5) The magnetic field shielding member makes it difficult for the magnetic field from the power generation coil 25 to reach the antenna 6, so that the magnetostriction (magnetostriction) of the antenna core 61 of the antenna 6 can be suppressed. Therefore, promotion of internal destruction of the antenna 6 due to magnetostriction can be suppressed, and the life of the antenna 6 can be extended.
Since expansion and contraction of the antenna core 61 caused by magnetostriction can be suppressed, rubbing between the electrically insulating coating film applied to the surface of the antenna coil 62 and the antenna core 61 can be prevented. Therefore, the electrical insulation state between the antenna coil 62 and the antenna core 61 can be maintained for a long time.

(2nd Embodiment)
FIG. 3 shows a radio timepiece 1 as a second embodiment according to the electronic timepiece of the invention. The radio timepiece 1 has the same basic configuration as that of the first embodiment, and the second embodiment is different from the first embodiment in that an antenna 6, a secondary battery 3, a power generation coil 25, and a motor coil 411 are provided. Arrangement.
In the present embodiment, the antenna 6 and the power generation coil 25 are arranged to face each other with the rotation center O of the rotary weight 21 interposed therebetween. In view of the configuration of the radio-controlled timepiece 1, it is more preferable that the antenna 6 and the power generation coil 25 are arranged at positions farthest from each other.

The secondary battery 3 and the pointer driving motor 41 are arranged between the power generation coil 25 and the antenna 6. The magnetic field shielding means includes the coil core 415 of the motor coil 411 and the case of the secondary battery 3. The magnetic field shielding means is mainly configured by the coil core 415 of the motor coil 411 and the case of the secondary battery 3, such as the train wheel section 42 and the power transmission section 22 arranged between the antenna 6 and the power generation coil 25. And the metal parts such as the rotary weight 21 are also included as magnetic field shielding means. For this reason, the magnetic circuit of the magnetic field generated by the power generation coil 25 is formed so as not to pass through the antenna 6 but to close through the coil core 415 of the motor coil 411, the secondary battery 3, the gear train, and the like.
Here, the coil core 251 of the power generation coil 25 has a rod shape, and both ends of the coil core 251 are preferably arranged along the outer peripheral edge of the base plate 81. As a result, the antenna 6 and the power generation coil 25 are arranged at positions farthest from each other on the opposite sides of the rotation center O of the rotary weight 21 in terms of their configuration. Further, the coil core 251 of the power generation coil 25 has a rod shape, and both ends of the coil core 251 are arranged along the outer peripheral edge of the base plate 81, so that the number of turns of the power generation coil 25 can be increased. In addition, power generation performance can be improved. Further, in order to improve the power generation performance, the power generation coil 25 may be wound along the outer peripheral shape of the main plate.
Incidentally, the point that the antenna 6 is arranged radially outward of the rotation locus of the rotary weight 21 is the same as in the first embodiment.

According to such a configuration, the following effect can be obtained in addition to the effects (1), (3), (4), and (5) of the first embodiment.
(6) Since the antenna 6 and the power generation coil 25 are arranged on the opposite sides of the rotation center O of the rotary weight 21 and at the most distant positions in the configuration, the magnetic field generated from the power generation coil 25 Is difficult to reach the antenna 6. For this reason, the reception by the antenna 6 is less likely to be affected by the magnetic field from the coil 25, and erroneous reception can be suppressed.

(Third embodiment)
FIG. 4 shows a radio-controlled timepiece 1 as a third embodiment according to the electronic timepiece of the present invention. The radio timepiece 1 has the same basic configuration as the second embodiment, and the third embodiment is different from the second embodiment in the following points.
That is, in the second embodiment, only one secondary battery 3 is provided, but in the present embodiment, two secondary batteries 3a and 3b are provided. Two secondary batteries 3a and 3b and a pointer driving motor 41 are arranged between the power generation coil 25 and the antenna 6.

Therefore, the magnetic field shielding means is mainly composed of the coil core 415 of the motor coil 411 and the respective cases of the secondary batteries 3a and 3b, but the wheel train arranged between the antenna 6 and the power generation coil 25. The gear train such as 42 and the power transmission unit 22 and metal parts such as the rotary weight 21 are also included as magnetic field shielding means in the same manner as in the above-described embodiment. For this reason, the magnetic circuit of the magnetic field generated by the power generation coil 25 is formed so as not to pass through the antenna 6 but to close through the coil core 415 of the motor coil 411, the secondary batteries 3a and 3b, the gear train, and the like.

According to such a configuration, the following effect can be achieved in addition to the effects similar to the effects (1), (3), (4), (5), and (6) of the above embodiment.
(7) Since the two secondary batteries 3a and 3b and the motor coil 411 are arranged between the antenna 6 and the power generation coil 25, the total length of the magnetic field shielding means can be made longer than in each of the above embodiments. Further, the magnetic flux of the magnetic field generated from the power generation coil 25 passes through the secondary batteries 3a and 3b and the motor coil 411, and a closed loop returning to the power generation coil 25 is more easily formed. Therefore, the magnetic field shielding effect by the magnetic field shielding means can be improved, and the effect of the magnetic field from the power generation coil 25 on the antenna 6 can be further reduced.

(Fourth embodiment)
FIG. 5 shows a radio timepiece 1 as a fourth embodiment according to the electronic timepiece of the invention. FIG. 6 is a sectional view taken along line VI-VI in FIG. The radio timepiece 1 has the same basic configuration as the second embodiment, and the fourth embodiment differs from the second embodiment in the following points.
That is, in the second embodiment, only one pointer driving motor 41 is provided, but in the present embodiment, two pointer driving motors 41a and 41b are provided.
The secondary battery 3 and two pointer driving motors 41a and 41b are arranged between the power generation coil 25 and the antenna 6. The pointer driving motors 41a and 41b are a second hand driving motor and an hour / minute hand driving motor, respectively.
The secondary battery 3 is arranged adjacent to the antenna 6, but the secondary battery 3 is arranged not to both ends of the antenna 6 but to the long sides of the antenna 6.
The magnetic field shielding means is mainly composed of the coil cores 415a and 415b of the motor coils 411a and 411b and the case of the secondary battery 3, but the train wheel section 42 arranged between the antenna 6 and the power generation coil 25, The point that the gear train such as the power transmission unit 22 and the metal parts such as the rotary weight 21 are also included as the magnetic field shielding means is the same as the above embodiment.

FIG. 7 shows a circuit 9 for storing the electric power generated by the power generation device 2 in the secondary battery 3.
The circuit 9 includes a generator coil 25 of a generator, a rectifier circuit 91 for rectifying the current generated by the generator coil 25, a secondary battery 3 for storing the rectified power, a generator coil 25 and a rectifier circuit 91. And an overcharge prevention circuit 92 for preventing overcharge of the secondary battery 3. Further, a clock circuit that is driven by the electric power stored in the secondary battery 3 and includes a current time counter, a motor driver, and the like is connected to the secondary battery 3, and the clock circuits include motors 41a and 41b for driving hands. It is connected.

The rectifier circuit 91 is configured by a bridge circuit connected to the power generation coil 25. In the bridge circuit, four diodes 911 are connected in series in a rectangular shape, and one side and the other side are respectively connected to the power generation coil 25 with a rectangular diagonal line as a boundary. The current generated by the power generation coil 25 by the rectification circuit 91 is full-wave rectified, and the rectified power is charged in the secondary battery 3.

The overcharge prevention circuit 92 includes two diodes 912 connected in series with their forward directions being opposite to each other, and limiter switch means 913 provided in parallel with one of the two diodes 912. I have.
The limiter switch unit 913 is configured to include, for example, a field effect transistor (MOS-FET). The limiter switch 913 is normally turned off, and the current generated by the power generation coil 25 flows through the rectifier circuit. However, when the storage voltage of the secondary battery 3 becomes higher than the threshold value, the switch is turned on, and the power generation coil 25 Short both ends.
When a standard radio wave is received by the antenna 6, the limiter switch 913 is turned on, and both ends of the power generation coil 25 are short-circuited. When both ends of the power generation coil 25 are short-circuited, charging of the secondary battery 3 is stopped.

According to such a configuration, the following effect can be achieved in addition to the effects similar to the effects (1), (3), (4), (5), and (6) of the above embodiment.
(8) Since the secondary battery 3 and the motor coils 411a and 411b are arranged between the antenna 6 and the power generation coil 25, the total length of the magnetic field shielding means can be made longer than in each of the above embodiments. The magnetic flux of the magnetic field generated from the coil 25 easily passes through the secondary battery 3 and the coil cores 415a and 415b of the motor coils 411a and 411b to form a closed loop that returns to the power generation coil 25 again. Therefore, the magnetic field shielding effect by the magnetic field shielding means can be improved, and the effect of the magnetic field from the power generation coil 25 on the antenna 6 can be further reduced. In particular, since the length of each of the coil cores 415a and 415b is larger than that of the secondary battery, the magnetic field of the present embodiment is larger than the case where the two secondary batteries 3a and 3b and one motor 41 of the third embodiment are provided. Since the shielding means can increase the overall length, the magnetic field shielding effect can be further improved.

(9) The limiter switch means 913 is provided in the overcharge prevention circuit 92, and while the standard radio wave is being received by the antenna 6, the limiter switch means 913 is turned on and the charging of the secondary battery 3 is stopped. . When the secondary battery 3 is charged, a magnetic field is generated due to a change in the electric field of the battery. This magnetic field may affect the reception of radio waves by the antenna 6, but the charging of the secondary battery 3 is stopped during reception by the antenna 6. Therefore, it is possible to prevent the magnetic field from the secondary battery 3 from affecting the radio wave reception and improve the reception sensitivity of the antenna 6. Since the secondary battery 3 does not affect the radio wave reception of the antenna 6, the degree of freedom in layout is improved, for example, the secondary battery 3 can be brought close to the antenna 6 as shown in FIG. By arranging the secondary battery 3 in the vicinity of the antenna 6, magnetic field shielding means can be constituted by the secondary battery. The radio wave reception time at the antenna 6 is several minutes to several tens of minutes a day, and even if the charging is stopped only during this time, the charging amount of the secondary battery is hardly affected.

(10) The secondary battery 3 is not adjacent to the end of the antenna 6 but adjacent to the long side. If the secondary battery is located at the end of the antenna 6, the linkage magnetic flux to the antenna 6 is drawn toward the outer can of the secondary battery 3, and the linkage magnetic flux of the antenna 6 decreases. It will be. However, since the secondary battery 3 is adjacent to the longitudinal side, not the end of the antenna 6, the magnetic field from the generator can be shielded without affecting the linkage magnetic flux of the antenna 6.
When the secondary battery 3 is made to be adjacent to the long side of the antenna 6, it is preferable that the secondary battery 3 is located at the center of the antenna 6. When the secondary battery 3 is located at the center of the antenna 6, the influence on the magnetic flux linkage of the antenna 6 can be reduced. For example, when the secondary battery 3 is provided at the center of the antenna 6 as shown in FIG. 1 as compared with FIG. 5, the influence of the secondary battery 3 on the interlinkage magnetic flux of the antenna 6 is reduced. be able to.

(Fifth embodiment)
FIG. 8 shows a radio timepiece 1 as a fifth embodiment according to the electronic timepiece of the invention.
The radio timepiece 1 is the same as the above embodiments in that the antenna 6 is arranged radially outside the rotation locus of the rotary weight 21, but the specific configurations of the power generator 2 and the drive unit 4 are different. I do.
The power generator 2 includes two generators 28, a oscillating weight 21 for driving the generator 28, two sets of power transmission units 22 for transmitting the power of the oscillating weight 21 to each of the generators 28, and a rotary operation from outside. The winding stem 26 of the crown 731 is provided so as to be capable of being provided, and two sets of wheel trains 27 for transmitting the rotation of the winding stem 26 to the respective generators 28.

The generator 28 is rotated by rotation (mechanical energy) transmitted by the power transmission unit 22 and the wheel train 27 as shown in the cross-sectional view of FIG. And a pair of rotor disks 281 and 282, magnets 284 provided at four points at 90-degree intervals on the rotor disks 281 and 282, and rotor disks 281 and 282. And three coils 285.
The rotation axes of the rotor disks 281 and 282 and the center axis direction of the coil 285 are orthogonal to the plane of FIG. That is, the axial direction of the coil 285 is a direction substantially orthogonal to a plane including the antenna core 61 of the antenna 6.

The drive unit 4 is composed of a multi-pole motor 43. The multi-pole motor 43 includes a multi-pole motor coil 431, a multi-pole motor stator 432 for transmitting a magnetic field from the motor coil 431, and a multi-pole motor rotatably provided in a stator hole of the multi-pole motor stator 432. And a pole motor rotor 433. A multi-pole magnet is formed on the outer periphery of the multi-pole motor rotor 433. The multi-pole motor stator 432 has a number of teeth formed toward the multi-pole motor rotor 433. A pointer for displaying the time is provided on the rotation axis of the multi-pole motor rotor 433.

In such a configuration, when the rotary weight 21 rotates or the winding stem 26 rotates by a manual winding operation, power is transmitted by the power transmission unit 22 or the train wheel 27 and the rotor disks 281 and 282 of the generator 28 are transmitted. Is rotated. When the magnet 284 is rotated together with the rotation of the rotor disks 281 and 282, the magnetic flux density passing through the coil 285 is changed, so that a current is generated in the coil 285.
When a pointer driving pulse is output to the multi-pole motor coil 431, a magnetic field is generated. This magnetic field acts on the multi-pole motor rotor 433 via the multi-pole motor stator 432, so that the multi-pole motor rotor 433 is step-rotated and the hands are step-driven.

According to the fifth embodiment, the following effects can be obtained in addition to the effects (1), (3), (4), and (5) of the above-described embodiment.
(11) Since the coil 285 of the generator 28 is substantially orthogonal to the plane including the antenna core 61 of the antenna 6, the antenna 6 is orthogonal to the magnetic flux of the magnetic field generated from the generator coil 285 of the generator 28. I do. Therefore, since the antenna 6 does not follow the magnetic flux lines of the magnetic field from the power generation coil 285 of the generator 28, the magnetic field from the power generation coil 285 of the generator 28 does not easily interfere with the antenna 6, and the magnetic field from the coil 285 to the antenna 6 , The reception sensitivity of the antenna 6 can be improved.

(12) Since the magnetic flux of the magnetic field generated from the power generating coil 285 of the generator 28 does not easily interfere with the antenna 6, the magnetostrictive action on the antenna 6 can be suppressed. Therefore, the same effect as the effect (5) of the first embodiment can be obtained. That is, promotion of internal destruction of the antenna 6 due to magnetostriction can be suppressed, and an electrical insulation state between the antenna coil 62 and the antenna core 61 can be maintained for a long time.

(Sixth embodiment)
FIG. 10 shows a radio-controlled timepiece 1 as a sixth embodiment according to the electronic timepiece of the invention. FIG. 10 is a partial sectional view of the sixth embodiment.
The radio timepiece 1 has the same basic configuration as the first embodiment, and the sixth embodiment differs from the first embodiment in the following points.
The radio-controlled timepiece 1 includes a main body case 7, a clock movement 100 disposed inside the main body case 7, and an antenna 6 for receiving a standard radio wave including time information as wireless information.

The main body case 7 has a substantially ring shape and is formed of a synthetic resin that is a nonmagnetic material. On one end surface side of the main body case 7, a dial 761 mounted in a ring of the main case 7 and a windshield 75 fitted to the main case 7 from outside the dial 761 are provided. . A back cover 74 is provided on the other end side of the main body case 7.
The dial 761 is formed of a non-conductive material such as synthetic resin or ceramic or a diamagnetic material such as brass, and the back cover 74 is formed of non-conductive glass.

The antenna 6 is provided in the main body case 7 as in the first embodiment, but the antenna 6 is embedded in the synthetic resin of the main body case 7 and the entire outer peripheral surface of the antenna is covered. When the antenna 6 is embedded in the main body case 7, the main body case 7 is formed by injection molding with the antenna 6 set at a predetermined position. As the synthetic resin, polycarbonate, ABS (acrylonitrile-butadiene-styrene resin) and the like are used.

According to such a configuration, the following effects can be obtained in addition to the effects (1), (3), (4), and (5) of the above embodiment.
(13) Since the main body case 7 is made of synthetic resin, unlike a metal or the like, it does not shield electromagnetic waves. Since the back cover 74 is also made of glass made of a non-conductive material, it does not shield electromagnetic waves. Therefore, the receiving sensitivity of the antenna 6 can be improved.

(14) Since the back cover 74 is made of glass of a non-conductive material, in addition to not shielding the electromagnetic field flowing into the antenna 6, a see-through structure showing the inside can be obtained, and the aesthetic appearance can be improved. .
(15) Since the antenna 6 is embedded in the main body case 7 made of synthetic resin, the strength of the main body case 7 can be increased by the rigidity of the antenna core 61. In addition, by embedding the antenna 6 in a synthetic resin, the metal such as the coil and the core of the antenna 6 can be protected from corrosion and the like, so that the corrosion resistance of the antenna 6 can be improved and the electrical insulation can be further improved. Further, when used for a long time, it is possible to prevent the problem that the metal abrasion powder generated from the speed increasing gear train of the power generation mechanism is gradually attached to the outer peripheral surface of the antenna 6 and the receiving sensitivity is gradually reduced. That is, not only the distance between the antenna 6 and the rotating weight 21 but also the distance between the antenna 6 and the metal wear powder are kept constant, so that the long-term reception sensitivity is guaranteed.

(Seventh embodiment)
Next, a seventh embodiment of the present invention will be described with reference to FIGS. 11, 12, and 13. FIG. FIG. 11 is a plan view of the seventh embodiment, FIG. 12 is a partial cross-sectional view of a main part of the seventh embodiment, and FIG. 13 is a cross-sectional view of the antenna 6.
The basic configuration of the seventh embodiment is the same as that of the above embodiment, but is characterized by the shape and arrangement of the antenna 6.

The antenna 6 includes an antenna core 61 and an antenna coil 62 wound around the antenna core 61. As shown in FIG. 13, the antenna core 61 is formed by laminating a plurality of thin and long amorphous metal plates 611 each having a thickness of about 0.01 mm to 0.05 mm. The material of the amorphous metal plate 611 is made of, for example, an amorphous metal of 50 wt% or more of Co. Here, if the thickness of the amorphous metal plate 611 is more than 0.05 mm, it is difficult to rapidly cool the central portion of the plate pressure, so that the metal is crystallized without being made amorphous. That is, in order to produce an amorphous metal, it is necessary to perform a rapid cooling operation before the metal is crystallized, and for that purpose, the thickness of the metal must be reduced. Further, when the thickness of the amorphous metal plate 611 is less than 0.01 mm, the strength of the amorphous metal plate 611 becomes weak and easily deformed in an assembling operation or the like. It becomes difficult.
The thickness of the amorphous metal plate 611 is substantially the same, but the width of the amorphous metal plate 611 stacked upward and downward in the stacking direction is gradually narrower than that of the amorphous metal plate 611 stacked in the center. Is formed. The amorphous metal plates 611 are bonded to each other with an insulating adhesive such as an epoxy resin. The cross-sectional shape of the stacked antenna cores 61 is substantially elliptical. Further, the length of the antenna core 61 is approximately half the circumference of the base plate 81.

The antenna core 61 is curved in a shape along the outer periphery of the base plate 81, and is provided on an end face of the outer periphery of the base plate 81 as shown in FIGS. In FIG. 11, assuming that the upper side of the paper is a 6 o'clock direction and the lower side of the paper is a 12 o'clock direction, the antenna core 61 is provided on the outer periphery of the base plate 81 in a range from about 3:00 to about 9:00.
The antenna coil 62 is wound to a predetermined width at a substantially central portion of the antenna core 61. When the antenna 6 is attached to the outer periphery of the base plate 81, the antenna coil 62 is provided corresponding to a range from about 5:00 to about 7:00.

The power generator 2 includes a generator 28, a rotary weight 21 that drives the generator 28, a power transmission unit 22 that transmits the power of the rotary weight 21 to the generator 28, and a crown that is rotatably provided from the outside. And a train wheel 27 that transmits the rotation of the winding stem 26 to the generator 28.
Here, the configuration of the generator 28 is the same as the configuration described in the fifth embodiment. Note that the radius of rotation of the oscillating weight 21 is substantially equal to the radius of the ground plate 81, and the antenna 6 is arranged radially outward of the rotation locus of the oscillating weight 21.
The winding stem 26 of the crown 731 is provided substantially at 3 o'clock, and is formed of a ferromagnetic metal member.

On the main plate 81, the circuit block 5, the drive unit 4, and the secondary battery 3 are arranged in addition to the generator 28.
On the circuit block 5, a crystal oscillator 511 for oscillating a reference clock, crystal oscillators 512 and 513 for generating a tuned signal tuned to the frequency of the standard radio wave, and the current time is measured and received. And a control IC 52 that corrects the time based on the obtained time information. In Japan, for example, two crystal oscillators 513 for tuning to a standard radio wave of 60 kHz and a crystal oscillator 512 for tuning to a standard radio wave of 40 kHz are provided in Japan. In Europe and the United States, for example, a 60 kHz crystal unit and a 77.5 kHz crystal unit are used. A control IC 52 is provided between the timekeeping quartz oscillator 511 and the tuning quartz oscillators 512 and 513, and the timekeeping quartz oscillator 511 and the control IC 52 are arranged close to each other, and the tuning quartz oscillator 512, 513 and the control IC 52 are arranged close to each other.

The drive unit 4 and the secondary battery 3 are as described in the first embodiment.
The pointer driving motor 41 constituting the driving unit 4 is arranged in a range from about 6 o'clock to about 9 o'clock, but is arranged corresponding to a range where the antenna core 61 is provided.
The main body case 7 is formed of a non-conductive member such as plastic. As shown in FIGS. 11 and 12, the diameter of the concave portion 71 is formed to be entirely large by the space of the antenna 6. Note that a concave portion that opens toward the approximate center of the timepiece may be formed only in a portion corresponding to the antenna coil 62 of the antenna 6 without increasing the diameter of the concave portion 71 as a whole.
The back cover 74 is formed of non-conductive glass, and the dial 761 is formed of a non-conductive member.

As described above, according to the seventh embodiment having such a configuration, the following effect is obtained in addition to the effects (1), (3), (4), (5), (6), (11), and (12) of the above-described embodiment. Can play.
(16) The antenna 6 has a shape along the outer periphery of the base plate 81 and is provided on the end face of the outer periphery of the base plate 81. Then, the base plate 81 and the antenna 6 are integrated, and the antenna 6 does not protrude from the movement 100. Further, since it is not necessary to provide a space for housing the antenna 6 in the main body case 7, the outer shape of the main body case 7 can be reduced by making the body of the main body case 7 thin. As a result, the radio-controlled timepiece 1 can be reduced in size as a whole, and the shape of the base plate can be freely selected, so that the design of the timepiece can be improved.

(17) Since the antenna core 61 is formed by laminating a plurality of thin amorphous metal plates 611, it is relatively easy to bend, and the antenna 6 can be bent along the outer periphery of the movement 100. In addition, since one amorphous metal plate 611 is thin and insulated from each other by epoxy resin, eddy current generated in each amorphous metal plate 611 can be reduced. Then, the magnetic field generated by the eddy current can be suppressed, and as a result, the reception sensitivity of the antenna 6 can be improved.

(18) The winding stem 26 is arranged at about 3 o'clock, and the end of the antenna core 61 is located at about 3 o'clock. Then, the electromagnetic wave induced by the winding stem 26 is easily linked to the antenna core 61, and the linking magnetic flux of the antenna 6 is increased, so that the receiving sensitivity of the antenna 6 can be improved.

(19) The clocking crystal oscillator 511 is close to the control IC 52, and the tuning crystal oscillators 512 and 513 are close to the control IC 52. Therefore, the stray capacitance of the wiring connecting the crystal oscillators 511 to 513 and the control IC 52 can be reduced. As a result, the timekeeping error can be reduced, and the impedance can be reduced by shortening the wiring distance, so that the energy for transmitting the signal can also be reduced.

(20) Since the rotor 413 of the pointer driving motor 41 floats from the stator 412 and rotates, an error may occur in the rotation cycle due to an external magnetic field from outside. However, the antenna coil 62 is provided outside the pointer driving motor 41. The antenna coil 62 shields an external magnetic field that enters from outside the watch body. Accordingly, the rotation of the rotor of the pointer driving motor 41 is accurately controlled, and a motor having a low magnetic resistance can be used.

Here, when the antenna 6 is arranged along the outer periphery of the base plate 81, as shown in FIG. 14A, it may be arranged along the outermost edge on the surface of the base plate 81. According to such a configuration, the following effects can be obtained.
(21) Since the antenna 6 is housed in the movement 100, the timepiece can be further reduced in size. In addition, by forming the concave portion at a position corresponding to the antenna coil 62 of the ground plate 81, a configuration in which the ground plate 81 is not obstructed even if the winding diameter of the antenna coil 62 is increased.

Alternatively, when the antenna 6 is arranged along the outer periphery of the base plate 81, the center of the movement 100 and the center of the rotary weight 21 may be eccentric as shown in FIG. That is, the rotation axis of the rotary weight 21 is eccentric from the center of the movement 100 to one side. In FIG. 14 (B), the eccentricity is set downward in the plane of the paper, that is, toward 12:00. The antenna 6 is arranged along the outermost edge on the surface of the base plate 81 in a range from about 4:00 to about 8:00 around the direction of about 6:00.
According to such a configuration, the following effects can be obtained.
(22) The eccentricity of the movement 100 and the rotary weight 21 increases the torque acting on the rotary weight 21 from the motion given to the timepiece by an external impact, thereby improving the power generation performance.
(23) While the oscillating weight 21 is arranged eccentrically in the 6 o'clock direction, the antenna 6 is arranged approximately in the 6 o'clock direction. Therefore, the distance between the oscillating weight 21 and the antenna 6 is widened, so that the electromagnetic wave is not shielded by the oscillating weight 21 and easily reaches the antenna 6. As a result, the reception performance at the antenna 6 can be improved.
(24) Since the pointer shaft located at the center of the movement 100 and the rotation shaft of the rotary weight 21 do not overlap, the thickness of the timepiece can be reduced.

(Eighth embodiment)
Next, an electronic timepiece according to an eighth embodiment of the invention will be described with reference to FIG. FIG. 15A is a plan view of a main part of the eighth embodiment, and FIG. 15B is a partial cross-sectional view of the main part of the eighth embodiment.
The basic configuration of the eighth embodiment is the same as that of the above embodiment, but is characterized by the shape and arrangement of the antenna 6 and the position of the rotating shaft of the rotating weight 21.
In FIG. 15A, the eighth embodiment includes a base plate 81 forming the movement 100, the antenna 6, the rotating weight 21 forming the power generation device 2, and the winding stem 26 forming the external operation mechanism 73. ing.
The antenna 6 is a flat antenna 6 formed by winding an antenna coil 62 around a substantially flat rectangular antenna core 61. The antenna 6 is arranged with the longitudinal direction substantially parallel to the direction from 6:00 to 12:00 on the surface of the base plate 81 at approximately 3 o'clock.
The oscillating weight 21 is provided eccentrically at about 9 o'clock from the center of the movement 100. Here, as shown in FIG. 15B, the rotary weight 21 is located on the side of the back cover 74 made of glass, whereas the flat antenna 6 disposed on the base plate 81 is , The dial 761 side.
The winding stem 26 is provided substantially at the 3 o'clock direction, and crosses over the flat antenna 6 in the short direction of the flat antenna 6.
The direction in which the rotation axis of the rotary weight 21 is decentered and the position where the flat antenna 6 is disposed are not particularly limited, and various types can be selected depending on the arrangement of other components.

As described above, according to the eighth embodiment having such a configuration, the following effect can be obtained in addition to the effects (1), (4), and (14) of the above-described embodiment.
(25) Since the flat type antenna 6 is thin, the winding stem 26 and the winding stem 26 can be arranged on the same side in a plane. When the watch is removed from the body and the watch is placed on a desk surface or the like, the watch is generally placed with the winding stem 26 facing upward (opposite to the desk surface). . Then, when the rotary weight 21 moves downward on the 9 o'clock side, the antenna 6 and the rotary weight 21 in the 3 o'clock direction are most separated. Therefore, the reception sensitivity of the antenna 6 can be improved while the timepiece is placed on the desk surface. In particular, by setting the set time of the radio wave reception to midnight, the possibility of performing the radio wave reception with the clock mounted is increased. As a result, the standard radio wave can be accurately received by the antenna 6.

(26) While the flat antenna 6 is disposed on the main plate, the rotary weight 21 is located on the back cover 74 side. Therefore, the flat antenna 6 and the oscillating weight 21 can be separated from each other in the rotation axis direction of the oscillating weight 21. Then, even the electromagnetic wave traveling crossing the rotation axis of the rotating weight 21 can be received by the antenna 6 without being shielded by the rotating weight 21, and the receiving sensitivity of the antenna 6 can be improved.

(27) Since the rotation axis of the oscillating weight 21 and the center of the movement 100 are eccentric, there is a portion on the surface of the main plate 81 that extends outward from the rotation locus of the oscillating weight 21. Therefore, the flat antenna 6 can be arranged on the outer base plate 81 from the rotation locus of the rotary weight 21. Therefore, it is only necessary to place the antenna 6 on the base plate 81 at the time of assembling, so that assembling is simplified and manufacturing efficiency can be improved.

(Ninth embodiment)
Next, a ninth embodiment of the electronic timepiece of the present invention will be described with reference to FIGS. FIG. 16 shows a plan view of the movement 100 of the ninth embodiment as viewed from the back cover 74 side, FIG. 17 shows a mainspring 221, and FIG. 18 shows a partial cross-sectional view of the ninth embodiment. In FIG. 16, the upper side of the paper is a 6 o'clock direction and the right side of the paper is a 3 o'clock direction.
The ninth embodiment is similar to the ninth embodiment in that a main case 7, a timepiece movement 100, an antenna 6, a dial 761, a windshield 75, and a back cover 74 are provided.

As shown in FIG. 16, the timepiece movement 100 includes a main plate 81 and a train wheel receiver 82, a rotating weight 21 having a rotation center substantially at the center of the main plate 81, a winding stem 26 as an external operation mechanism 73, A mainspring 221 as a mechanical energy storage mechanism wound up by the weight 21 and the winding stem 26, a generator 28 for generating electric power by the power of the mainspring 221 and a power transmission unit as an energy transmission mechanism connecting the mainspring 221 and the generator 28 22 and a circuit block 5.

The base plate 81 has a substantially circular plate shape, and is formed of a non-conductive member (for example, synthetic resin) or a diamagnetic material (for example, brass).
A rotary weight 21 having a rotation axis substantially at the center of the main plate 81 is provided. The oscillating weight 21 has a center angle of about 90 degrees and is provided to be rotatable by 360 degrees or more. The oscillating weight 21 is formed of a conductive material, for example, a heavy metal such as gold, a gold alloy, or a tungsten alloy.

ぜ On the main plate 81, a mainspring 221 as a mechanical energy storage mechanism that is wound up by the rotation of the rotary weight 21 is provided. As shown in FIG. 17, the mainspring 221 is housed in a barrel wheel 222, and is made of an amorphous non-magnetic material to prevent torque fluctuation due to magnetization or the like.

The rotating shaft of the oscillating weight 21 meshes with a square wheel 223 that rotates integrally with the barrel true. The rotation of the rotating weight 21 causes the square wheel 223 to rotate, and the mainspring 221 is wound up. Further, a winding stem 26 for manually winding the mainspring 221 at about 3 o'clock is provided. The winding stem 26 is formed of a metal member made of a ferromagnetic material. The rotation of the winding stem 26 is transmitted to the square wheel 223 by a train wheel having a transmission wheel 224, and the mainspring 221 is wound up by the rotation of the winding stem 26.
The mainspring 221 is located over a range from approximately 11:00 to approximately 2:00.

The rotation of the barrel car 222 is transmitted to the generator 28 by the power transmission unit 22. The basic configuration of the generator 28 is the same as that of the generator 28 described in the fifth embodiment. A shaft of a pointer (not shown) meshes with the power transmission unit 22, and the pointer is rotated by the force released by the mainspring 221. The generator 28 is located in a range from about 7:00 to about 8:00.

回路 A substantially crescent-shaped circuit block 5 is provided on the base plate 81. A wiring pattern is provided on a surface of the circuit block 5 facing the ground plate 81. The circuit block 5 includes a clocking crystal oscillator 511 that oscillates a reference clock, tuning signal crystal oscillators 512 and 513 that generate a signal synchronized with a standard radio wave, and a control IC 52. Two crystal oscillators for tuning signals are provided, one for 40 kHz (512) and one for 60 kHz (513). The control IC 52 is provided in a range from about 6:00 to about 7:00. The clocking crystal oscillator 511 and the tuning signal crystal oscillators 512 and 513 are provided with the control IC 52 interposed therebetween. A power supply block (not shown) is provided in the circuit block 5, and the power generated by the generator 28 is stored in the power supply block.

The control IC 52 counts the current time based on the reference clock generated from the oscillation of the clocking crystal oscillator 511, and controls the current value flowing through the power generation coil 285 to rotate the rotor disks 281 and 282. By adjusting the speed (rotation control), the hands of the hands (not shown) connected to the train wheel 27 are accurately controlled. If the time display by the hands is delayed, an acceleration pulse is applied to the generator 28. To confirm the time display, one of the gears of the second wheel to which the second hand was connected was formed so that the load was greater than the other gears, and the induced voltage of the power generation coil was compared with the rotation speed of the second wheel. For example, it is exemplified that the second wheel is rotated at a timing according to the reference. Alternatively, a through hole through which light passes may be formed in one of the gears of the second wheel, and rotation of the second wheel may be confirmed at the timing of the light passing through this through hole.
Further, the control IC 52 corrects the current time count based on the time information of the standard radio wave received by the antenna 6, and also corrects the pointer position.

The circuit block 5 is formed of an FPC (Flexible Printed Circuit), has flexibility, and is mounted on the base plate 81 while being sandwiched between the circuit receiver 53 and the circuit receiver 54. The circuit receiver 53 and the circuit receiver 54 are formed of an electrically insulating member such as ceramic or synthetic resin.

The antenna 6 is provided along the outer periphery of the movement 100. The antenna 6 is provided at an outer peripheral end of the circuit seat 53. The configuration of the antenna 6 is the same as that described in the seventh embodiment. The antenna core 61 is provided at an outer peripheral end of the circuit seat 53 from approximately 12:00 to approximately 8:00. The antenna coil 62 is wound around the antenna core 61 about the direction of about 4 o'clock. The antenna coil 62 and the control IC 52 are connected by wiring (not shown).

As described above, according to the ninth embodiment having such a configuration, the effects (1), (2), (4), (11), (12), (14), (16), (17), (18), and (19) of the above-described embodiment are obtained. In addition to the above, the following effects can be obtained.
(28) Since the antenna coil 62 surrounds the movement 100 from about 12:00 to about 8:00, before the external magnetic field invading from the outside of the watch body by the antenna core 61 enters the inside of the watch body. Shielded. Therefore, the magnetic field resistance can be improved without the external magnetic field affecting the generator 28. Since the external magnetic field does not affect the generator 28, the rotation control by the generator 28 is performed accurately, and accurate hand movement of the hands can be performed.

(29) Since the antenna 6 is provided at the outer peripheral end of the circuit seat 53, the wiring distance between the circuit block 5 supported by the circuit seat 53 and the antenna 6 can be reduced, and at the same time, the control IC 52 and antenna 6 can be brought close to each other.
(30) The axis of the power generation coil 285 of the generator 28 is oriented in a direction substantially perpendicular to the main plate 81, that is, substantially perpendicular to the axis of the antenna 6. Therefore, the direction of the magnetic field from the generator 28 and the direction of the magnetic field of the antenna 6 are substantially orthogonal to each other, and the arrangement is such that they do not easily interfere with each other. Further, as shown in FIG. 9, the magnetic field generated in the generator 28 draws a closed loop between the generator coil 285 and the magnet 284 of the generator 28, so that the magnetic field is less likely to leak outside. Therefore, the antenna 6 and the generator 28 hardly interfere with each other magnetically (reduced mutual inductance), and the antenna 6 and the generator 28 can be arranged close to each other.

Note that the electronic timepiece and the electronic device of the present invention are not limited to the above-described embodiment, and it is needless to say that various changes can be made without departing from the gist of the present invention.
The rotary weight 21 does not rotate 360 degrees or more, and may swing at less than 360 degrees.
In the first embodiment, the angle at which the central axis 6A of the antenna 6 intersects with the central axis 25A of the power generation coil 25 is not limited to approximately 90 degrees, but may be in the range of 60 degrees or more and 120 degrees or less. Even with such a configuration, since the magnetic flux of the magnetic field from the power generation coil 25 does not follow the antenna 6, the magnetic field is unlikely to affect the antenna 6.
In each of the above embodiments, the number of the pointer driving motors 41 or the secondary batteries 3 is not particularly limited, and may be one or two or more.

In each of the above embodiments, the magnetic field shielding member is not limited to the case of the coil core 415 of the motor 41 and the case of the secondary battery 3, and may be configured by newly providing a magnetic field shielding material for shielding the magnetic field.
As the magnetic field shielding member, various alloys such as iron, nickel, permalloy, and amorphous metal can be used, and any ferromagnetic material having a high magnetic permeability may be used.
The coil core 415 of the pointer driving motor 41 may be formed of a cobalt-based amorphous metal in which Co (cobalt) is 50 wt% or more. The motor stator 412 may be formed of an iron-based amorphous metal containing 50 wt% or more of iron. Since such an amorphous metal has high magnetic permeability, the coil core 415 and the motor stator 412 can be used as a magnetic field shielding member. Further, when the coil core 415 is formed of an amorphous metal having a Co content of 50 wt% or more, iron loss can be prevented and the efficiency of the motor can be increased.

Furthermore, in each of the above embodiments, the magnetic field shielding means does not necessarily have to be provided. That is, in the present invention, the antenna 6 may be disposed radially outward of the rotation locus of the rotary weight 21, and the presence or absence of the magnetic field shielding means between the antenna 6 and the power generation coil 25 is not limited. This is because the influence of the magnetic field from the power generation coil 25 can be reduced as long as the dimensions between the power generation coil 25 and the antenna 6 are secured to some extent, even if the magnetic field shielding means is not provided.

In the above embodiments, while the wireless information is being received by the antenna 6, the driving of the pointer driving motor 41 may be stopped. If the current of the pointer driving motor 41 is stopped when the wireless information is received as described above, the magnetic field generated from the pointer driving motor 41 is not superimposed on the antenna 6, and The magnetic field from the power generation coil 25 can be efficiently shielded by the motor coil 411. By the way, the current required to drive the hands may be intermittent and weak, so that even if such a current flows through the hands drive motor 41, the magnetic field generated from the motor coil 411 is weak. It can function sufficiently as magnetic field shielding means.

In the above embodiment, when the antenna 6 is arranged along the outer periphery of the movement 100, the antenna 6 is attached to the base plate 81 or the circuit seat 53. However, for example, the antenna 6 may be arranged along the outer periphery of the movement. The antenna 6 may be attached to the main body case 7 along the outer edge of the movement 100 after being bent into a bent shape.

In FIG. 15 of the eighth embodiment, the case where the center of the movement 100 is different from the rotation axis of the oscillating weight is described. May be formed to be shorter than the major axis. This is because even in such a configuration, a region outside the rotation radius of the rotary weight 21 is formed on the base plate 81.
In each of the above embodiments, when the rotation center of the rotary weight 21 and the pointer axis of the pointer are shifted, the pointer axis of the pointer is shifted from the center of the movement 100 and the rotation axis of the rotary weight 21 is shifted from the center of the movement 100. Alternatively, the center axis of the hands may be shifted from the center of the movement 100 with the rotation axis of the rotating weight 21 as the center of the movement 100. Furthermore, the oscillating weight 21 may be located between the upper part of the dial and the glass.

In the ninth embodiment, the mechanical energy storage mechanism has been described as a mainspring, but the mechanical energy storage mechanism is not limited to the mainspring, and for example, rubber or a spring can be used.
Here, in each embodiment, it is desirable that the antenna coil is wound in an aligned manner. According to such a configuration, it is possible to give a fine impression with good appearance. Further, the reception sensitivity can be improved by aligning the vectors of the linkage magnetic flux. In addition, using a copper wire, a silver wire, etc. as a material of a winding is illustrated.
It is desirable that the cross-sectional shape of the winding of the antenna coil be substantially square. Then, compared to the case where the cross section of the winding is circular, no gap is formed between the windings when the winding is wound around the antenna core. As a result, the number of windings can be increased and the windings can be concentratedly wound without any gap, and the reception sensitivity can be improved by increasing and concentrating the linkage magnetic flux. If the number of turns is the same, the antenna 8 itself can be downsized. The radio-controlled timepiece itself can be reduced in size.
If the cross section of the winding of the antenna coil is circular, when winding the winding around the antenna core, the cross-sectional shape of the winding is made substantially hexagonal while being pulled by the tensile stress in the plastic deformation region of the winding. It may be wound in a deformed state. Then, since the windings are wound in a honeycomb shape, dead space is eliminated and downsizing can be achieved. Further, since the windings can be concentratedly wound without any gap, the linkage sensitivity can be improved by concentrating the linkage magnetic flux.

The present invention is not limited to the radio-controlled timepiece, and may be an electronic timepiece that includes the rotating weight 21 and the antenna 6 and receives wireless information, or an electronic device that does not include a timekeeping mechanism. The present invention can be applied to various electronic devices such as a portable radio, a music box, a mobile phone, a portable wireless device, and an electronic organizer. In particular, since power is generated by using the rotating weight 21, quick charging can be performed in a short time. It is suitable for small electronic devices. For example, a measurement result of physical characteristics such as atmospheric pressure, gas concentration, voltage, and current may be transmitted as wireless information, and an electronic device that receives the wireless information may drive a pointer to display the measured value in an analog manner.

Further, the wireless information is not limited to the time information based on the long-wave standard radio wave. For example, wireless information using FM, GPS, Bluetooth, or a non-contact IC card may be used, and the content of wireless information such as news, weather forecast, and stock price information is not limited.
If the received external wireless information is, for example, a weather forecast, it may be displayed by driving a pointer so as to indicate information such as preset sunny, cloudy, and rain with a pointer, or may be displayed by news or stock price information. May be displayed by an electronic display device such as a liquid crystal display device.
Further, the above embodiments may be appropriately combined.

As described above, according to the radio-controlled timepiece and the electronic device of the present invention, it is possible to achieve an excellent effect that power can be generated by the power generating mechanism having the rotating weight and wireless information can be received.

FIG. 2 is an internal configuration diagram of the first embodiment of the present invention with a back cover removed. It is sectional drawing which shows the principal part of the said 1st Embodiment. FIG. 10 is an internal configuration diagram of the second embodiment of the present invention with a back cover removed. FIG. 13 is an internal configuration diagram of a third embodiment of the present invention with a back cover removed. FIG. 14 is an internal configuration diagram of a fourth embodiment of the present invention with a back cover removed. FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5 in the fourth embodiment. FIG. 14 is a diagram showing a circuit from a power generation coil to a secondary battery in the fourth embodiment. FIG. 14 is an internal configuration diagram of the fifth embodiment of the present invention with a back cover removed. It is sectional drawing of a generator in the said 5th Embodiment. It is sectional drawing of the principal part of 6th Embodiment of this invention. It is an internal structure figure in which the back lid of a 7th embodiment of the present invention was removed. It is sectional drawing of the principal part in the said 7th Embodiment. It is sectional drawing of the antenna in the said 7th Embodiment. (A) is a diagram showing a modification of the arrangement position of the antenna. FIG. 6B is a diagram illustrating a modified example of the arrangement position of the antenna and the position of the rotation center of the rotary weight. (A) It is a top view of an important section in an 8th embodiment of the present invention. (B) It is a sectional view of an important section of an 8th embodiment. It is an internal structure figure in which a back lid was removed in a ninth embodiment of the present invention. It is a figure in the 9th embodiment showing a mainspring. It is sectional drawing of the principal part in the said 9th Embodiment.

Explanation of reference numerals

Reference numeral 2 denotes a power generation device (power generation mechanism), 3, 3a, 3b: a secondary battery (magnetic field shielding means), 6: an antenna, 1 ... a radio clock (electronic timepiece, electronic device), 21 ... a rotating weight, 25 ... a power generation coil , 41, 41a, 41b: pointer driving motor (stepping motor), 51: quartz oscillator, 52: control IC (timepiece mechanism, receiving mechanism), 61: antenna core, O: center of rotation, R: radius of rotation

Claims (1)

A power generating mechanism including a oscillating weight having a conductive material and a generator for converting mechanical energy due to rotation of the oscillating weight into electrical energy, a time measuring mechanism for measuring time, and a receiving mechanism having an antenna for receiving wireless information With
The antenna is provided radially outside the rotary weight relative to the rotation locus of the rotary weight outer peripheral edge,
The power generating mechanism is rotated by the mechanical energy and has a predetermined interval and a pair of rotor disks provided on a concentric shaft,
Magnets provided opposite to each other on the opposing surfaces of the rotor disks and integrally rotating with the rotor disks;
An electronic timepiece comprising: a coil disposed between the rotor disks.

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