JP2003215271A - Electronic watch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic watch in which the transmission-reception efficiency of radio waves by a noncontact-type radio communication device is ensured even when a photovoltaic cell is installed. <P>SOLUTION: The electronic watch 100 is constituted so as to be provided with a case body 101, a windshield 102 attached to a front-side opening 101A in the case body 101, a rear lid 102 attached to a back-side opening 101B in the case body 101, a movement 104 arranged inside the case body 101, a winding core 105 used to perform a time adjusting operation of the movement 104, a crown 106 attached to an outer end of the winding core 105, a dial 107 which is arranged at the inside of the windshield 102 and which is attached from the lower side of a fixation part 101C protruding from an inner wall part of the case body 101, a ring-shaped board 108 fixed to the rear side of the dial 107 and a conductive member 120 formed to be nearly ring-shaped so as to surround the outer circumferential face side of the case body 101. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a movement for driving a time display means, a solar cell for generating electric power for operating the movement, a case for accommodating the movement around, and a time display means for the movement. The present invention relates to an electronic timepiece having a windshield covering the side.

[0002]

BACKGROUND ART From the standpoint of global environment conservation, solar cells have been attracting attention as a power source for small electronic devices such as quartz watches, in place of conventional button batteries. Solar cells are extremely excellent as energy sources for electronic timepieces from the standpoints of environmental protection such as their power generation capacity, cleanliness of energy sources (not containing harmful heavy metals such as mercury and cadmium), and manufacturing of solar cells themselves.

On the other hand, magnetic cards have become widespread as telephone cards, various credit cards, point cards issued by retailers, highway highway cards, and other various-purpose cards. However, the danger of being easily forged has become a social problem. Therefore, IC cards are becoming popular for the purpose of preventing forgery, holding private confidential information, and increasing the storage capacity.

However, even if the IC card is used, it is necessary to bring the reader / writer into contact with the reader / writer to transfer data. Since it had to be handed over to a writer, it was not safe with regard to forgery and confidentiality.

On the other hand, the non-contact IC card that has recently appeared can exchange data with a reader / writer without contact, so that the read / write operation is simple and the safety is improved. Since it is a card type, there is still a risk of loss, and there is also a complicated aspect in that it needs to be taken out from a pocket or the like each time it is used.

Therefore, recently, a product in which the above-mentioned non-contact IC card function is built into a wrist watch always carried by a user has been put into practical use. In this wristwatch, a noncontact data communication unit having a structure built in a noncontact IC card, that is, an antenna and a transmitting / receiving means for performing noncontact data communication with the outside through the antenna is incorporated in a wristwatch case. It is

[0007]

However, when the solar cell incorporated in the electronic timepiece is provided, since the solar cell is generally provided on the conductive substrate, it is sent from the outside. The incoming radio waves and the radio waves emitted from the watch itself are electrostatically or electromagnetically shielded by the substrate,
There is a problem in that it is weakened and the efficiency of transmitting and receiving radio waves is lowered.

An object of the present invention is to provide an electronic timepiece in which the radio wave transmission / reception efficiency of a non-contact type wireless communication device is ensured even if solar cells are provided.

[0009]

In order to achieve the above object, an electronic timepiece according to the present invention accommodates a movement for driving a time display means, a solar battery cell for generating electric power for operating the movement, and the movement. An electronic timepiece including a case and a windshield that covers the time display means side of the movement, wherein the case includes:
A wireless communication unit for performing wireless communication with another transmission / reception device provided outside the electronic timepiece is housed, and the wireless communication unit has a loop antenna formed in an annular shape and wireless communication via the loop antenna. And a transmission / reception means for performing
The loop antenna is arranged radially outward of the outer peripheral edge side of the movement.

According to the present invention as described above, since the loop antenna is arranged radially outside the outer peripheral side of the movement, the loop antenna is not covered by the movement. Radio waves transmitted from the outside or radio waves emitted from the watch itself are not electrostatically or electromagnetically shielded by the solar battery cells, and the radio wave transmission / reception efficiency of the non-contact type wireless communication device is secured.

In the electronic timepiece of the present invention, the movement has an electromagnetic converter, the electromagnetic converter includes a coil formed by winding, and the loop antenna and the coil are mutually It is preferable that the central axes of are arranged orthogonally. According to this, since the central axes of the loop antenna and the coil are arranged orthogonally to each other, the magnetic fields generated by the loop antenna and the coil do not interfere with each other. It is possible to prevent malfunction of the communication unit.

In the electronic timepiece of the present invention, a motor can be adopted as the electromagnetic converter. In addition to the normal motor that rotates,
A step motor is also included. The step motor may also have a power generation function. By doing this, it becomes possible to incorporate a non-contact communication unit in the driven timepiece, and when the motor drives the hands of the timepiece, malfunction of the electromagnetic converter rarely occurs. Is less likely to occur.

In the electronic timepiece of the invention, it is preferable that the electromagnetic converter is a generator. According to this, since the electromagnetic converter is a generator, the generator generates electricity for operating the electronic timepiece. Therefore, when the solar battery cell cannot generate electric power, the auxiliary generator Since electric power can be generated, the electronic timepiece can be constantly operated.

In the electronic timepiece of the invention, it is preferable that the loop antenna is provided on at least one of the front surface and the back surface of the windshield. According to this, since the loop antenna is provided on at least one of the front surface and the back surface of the windshield, the loop antenna is separated from the solar cell by the radio waves transmitted and received, and the radio wave generated by the loop antenna and Since radio waves sent from the outside are not electrostatically or electromagnetically shielded by the solar battery cells, the radio wave transmission / reception efficiency of the non-contact type wireless communication device is further ensured. Further, since the loop antenna is formed in an annular shape, by providing it on the periphery of the windshield, it is possible to contribute to the improvement of the appearance without deteriorating the visibility of the timepiece dial plate and the like.

The electronic timepiece of the present invention comprises a movement for driving the time display means, a solar battery cell for generating electric power for operating the movement, a case for accommodating the movement, and the time display means side of the movement. An electronic timepiece including a windshield for covering, wherein a wireless communication unit for performing wireless communication with another transmission / reception device provided outside the electronic timepiece is housed in the case, and the wireless communication unit is A loop antenna formed in a ring shape, and a transmitting / receiving means for performing wireless communication via the loop antenna, wherein the loop antenna and the movement are provided at different positions in the thickness direction of the case. It is characterized by being

According to the present invention, since the loop antenna and the movement are provided at different positions in the thickness direction of the case, the loop antenna and the movement overlap in a plane. Even if radio waves sent from the outside or radio waves emitted from the watch are circulated and transmitted and received, the non-contact type wireless communication device is not shielded electrostatically or electromagnetically by the solar cells. The transmission and reception efficiency of the radio wave of is secured.

In the electronic timepiece of the invention, the movement has an electromagnetic converter, the electromagnetic converter includes a coil formed by winding, and the loop antenna and the coil are mutually arranged. It is preferable that the central axes of are arranged orthogonally. According to this, since the central axes of the loop antenna and the coil are arranged orthogonally to each other, the magnetic fields generated by the loop antenna and the coil do not interfere with each other. It is possible to prevent malfunction of the communication unit.

In the electronic timepiece according to the present invention, the electromagnetic converter may be a motor. In addition to the normal motor that rotates,
A step motor is also included. By doing this, it becomes possible to incorporate a non-contact communication unit in the driven timepiece, and
When the motor drives the hands of the timepiece, malfunctions of the electromagnetic converter rarely occur, so that time error is unlikely to occur.

In the electronic timepiece of the present invention, the electromagnetic converter is preferably a generator. According to this, since the electromagnetic converter is a generator, the generator generates electricity for operating the electronic timepiece. Therefore, when the solar battery cell cannot generate electric power, the auxiliary generator Since electric power can be generated, the electronic timepiece can be constantly operated.

In the electronic timepiece of the present invention, it is preferable that the loop antenna is provided on at least one of the front surface and the back surface of the windshield. According to this, since the loop antenna is provided on at least one of the front surface and the back surface of the windshield, the loop antenna is separated from the solar cell by the radio waves transmitted and received, and the radio wave generated by the loop antenna and Since radio waves sent from the outside are not electrostatically or electromagnetically shielded by the solar battery cells, the radio wave transmission / reception efficiency of the non-contact type wireless communication device is further ensured. Further, since the loop antenna is formed in an annular shape, by providing it on the periphery of the windshield, it is possible to contribute to the improvement of the appearance without deteriorating the visibility of the timepiece dial plate and the like.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of an electronic timepiece having a wireless communication function according to the present invention will be described in detail with reference to the accompanying drawings. Each of the embodiments described below shows a specific configuration (timepiece) of an electronic timepiece having a wireless communication function. However, the present invention is not limited to wristwatches and can be similarly applied to other electronic timepieces such as pocket watches.

[First Embodiment] FIG. 1 is a perspective view showing the overall configuration of a wireless communication system for an electronic timepiece 100 according to a first embodiment of the present invention. This wireless communication system includes an electronic timepiece 100 and an external transmitting / receiving device 510 capable of wirelessly communicating with the electronic timepiece 100. In the illustrated example, the external transmission / reception device 510 is incorporated in the gate device 500 installed at a gate position (a ticket gate or the like) through which a train or a lift is to be passed.

The electronic timepiece 100 and the external transmission / reception device 51
The wireless communication with 0 is generally 13.56 [MHz]
Alternatively, it is weak radio communication performed by using a carrier wave (carrier signal) of 125 [kHz] and limiting the transmission output of both devices to a low level. Therefore, a range of several centimeters from the external transmitter / receiver 510 becomes the communicable range, and the user can set the electronic timepiece 100 to the external transmitter / receiver 51 in order to perform bidirectional data communication immediately before passing through the gate G.
Need to be close to the 0 antenna.

(Structure of External Transmitting / Receiving Device) FIG. 2 is a block diagram showing the structure of the external transmitting / receiving device 510 incorporated in the gate device 500. This external transceiver 510
In, the control device 511 controls the entire external transmission / reception device 510. The transmission circuit 512 generates and outputs a transmission control signal under the control of the control device 511. Receiver circuit 513
Receives the reception signal of the antenna 515 through the high frequency circuit 514, demodulates the reception data from the reception signal and outputs the demodulated data to the control device 511. The high frequency circuit 514 generates a transmission signal based on the transmission control signal to generate the transmission signal.
It transmits to the electronic timepiece 100 via 15 and outputs the reception signal from the electronic timepiece 100 received by the antenna 515 to the receiving circuit 513.

(Structure of Radio Communication Section) FIG. 3 shows an electronic timepiece 1.
10 is a block diagram showing a configuration of a wireless communication unit 110 having a wireless communication function of 00. In the wireless communication unit 110 of the electronic timepiece 100, a loop antenna 111 and a transmitting / receiving means 11 for communicating via the loop antenna 111.
With 0 RF. The loop antenna 111 is configured in a loop shape having a loop shaft 111a oriented in a predetermined direction. The wireless communication unit 110 is, for example,
It can be configured using a non-contact IC card standard such as ISO14443. The transmitting / receiving means 110RF is composed of a tuning capacitor 112 connected to both ends of the loop antenna 111 and a communication module 110IC including an integrated circuit (IC).

The communication module 110IC includes a rectifier circuit 113 connected to the loop antenna 111, and a receiver circuit 114 connected to the loop antenna 111 for demodulating a reception signal received by the loop antenna 111 and outputting reception data. , The loop antenna 111, which modulates transmission data to generate a transmission signal.
11, a transmission circuit 115 for transmitting to the reference signal generator 11, a reference signal generation circuit 116 for generating a predetermined reference signal based on a clock signal output from an oscillation circuit, and a reference signal transmitted from the reference signal generation circuit 116 for receiving received data. Of the received data content from the data string, and a conversion processing circuit 117 that receives the transmission data content to form the transmission data, and receives the received data content from the conversion processing circuit 117 and outputs the transmission data content to the conversion processing circuit 117. Memory 110M including a central control circuit 118, a cryptographic processing circuit 119 that encrypts transmission data and decrypts reception data under the control of the central control circuit 118, and a nonvolatile memory that records an ID number and data content. And have.

Here, the rectifier circuit 113 is configured to extract electric power from a carrier wave (carrier signal) received by the loop antenna 111 and send the electric power to each circuit through a power supply line. Note that the power may be supplied from a power source such as a battery built in the device, instead of the power supply mode in which the power generated from the received signal is supplied. Further, the memory 110M is preferably a rewritable memory such as an EEPROM or a flash memory. Further, instead of the memory fixed in the electronic timepiece, or in addition to the fixed memory, a removable medium such as a memory card may be provided. Further, the cryptographic processing circuit 119 uses a DES (Data Encryption
Standard), RSA (RL Riverst, A. Shamir, L. A
delman) and other cryptographic processing functions.

(Structure of time information display processing function part) FIG. 4
FIG. 3 is a schematic block diagram showing a structure (time information display processing display unit) for realizing a main body function of the electronic timepiece 100. The electronic timepiece 100 may have only the wireless communication function as described above, but in the case of the present embodiment,
It also has the time information display function of the electronic timepiece. The configuration that realizes this function includes the watch CPU 14 and the pointer drive unit 18.

The watch CPU 14 controls the entire timepiece function (time information display function), and responds to drive control of time information display means such as a pointer and operation by an external operation means such as a winding stem which will be described later. The display mode and internal time are controlled.

In addition, the pointer drive section 18 includes a drive circuit 18A.
And a drive mechanism 18B. The drive mechanism 18B includes a step motor 310 and a drive coil 311 that generates a magnetic force by a drive pulse supplied from the drive circuit 18A.
And a stator 312 excited by the drive coil 311, and a rotor 313 rotated by a magnetic field excited inside the stator 312. The stator 312 is provided with a magnetic saturation part 317 so that different magnetic poles are generated in the facing parts 315 and 316 around the rotor 313 due to the magnetic force generated in the driving coil 311.

Further, in order to regulate the rotation direction of the rotor 313, an inner notch 318 is provided at an appropriate position on the inner circumference of the stator 312. In this configuration, when the driving coil 311 excites the stator 312,
Cogging torque is generated in the rotor 313,
Stops at the appropriate position. Rotation of the rotor 313 of the step motor 310 is performed by rotating the fifth wheel 351 and the fourth wheel 352, the third wheel 353, the second wheel 354, the back wheel 355 and the hour wheel 356 which are meshed with the rotor 313 through the pinion. It is transmitted to each pointer by the train wheel 350.

The second hand 361 is connected to the shaft of the fourth wheel & pinion 352, the minute hand 362 is connected to the second wheel & pinion 354, and the hour hand 363 is further connected to the hour wheel 356 to rotate the rotor 313. The time (time information) is displayed by these hands in conjunction with each other.

The drive circuit 18A is a circuit that supplies drive pulses of various waveforms to the step motor 310 in accordance with drive commands from the watch CPU 14. This drive circuit 1
8A is a p-channel MOS transistor 333a, an n-channel MOS transistor 332a, a p-channel M
A bridge circuit including an OS transistor 333b and an n-channel MOS transistor 332b is provided.

Driving coil 31 of step motor 310
1 is a p-channel MOS transistor 333a and n
The connection point of the channel MOS transistor 332a and p
It is inserted between the connection point of the channel MOS transistor 333b and the n-channel MOS transistor 332b. These MOS transistors 332a, 33
By applying a control pulse from the watch CPU 14 to the gate electrodes of 2b, 333a, and 333b, the drive pulse is supplied to the drive coil 311 and the rotor 31
3 is driven.

(Structure of Electronic Timepiece) As shown in FIG. 5, the electronic timepiece 100 of this embodiment has a substantially annular conductive member 1.
20 and a band attaching portion 140 protruding from the outer peripheral surface of the conductive member 120. At the positions of the conductive member 120 at 3 o'clock, about 10 o'clock, and about 7 o'clock, the crown 106 and the operation switch A10 are provided, respectively.
6A and operation switch B106B are provided.
The 3 o'clock portion of the conductive member 120 is a gap 120G in which the insulating member is filled. A band 141 made of leather is attached to the band attaching portion 140. This band 141 is made of leather, plastic,
It may be made of any material such as metal.

As shown in FIG. 6 (thickness direction sectional view) and FIG. 7 (horizontal direction sectional view), the internal structure of the electronic timepiece 100 includes a case body 101 and a front side opening portion 101A of the case body 101. The attached windshield 102 and the back cover 1 attached to the back side opening 101B of the case body 101.
03 and the movement 1 arranged in the case body 101
04, a winding stem 105 for performing the time adjustment operation of the movement 104, a crown 106 attached to the outer end of the winding stem 105, and a fixing member that is arranged inside the windshield 102 and projects from the inner wall portion of the case body 101. The dial 107 attached from the lower side of the portion 101C and the dial 10
7, a ring-shaped substrate 108 fixed to the back side and a conductive member 120 formed in a substantially ring shape so as to surround the outer peripheral surface side of the case body 101.

Here, the case body 101 includes a front side opening 101A, a rear side opening 101B, and a case body 101.
A fixed portion 101C protruding from the intermediate portion of the inner wall portion of
The case body 101 is made of an insulating material such as plastic, which is formed in a substantially annular shape and has a flange portion 101D having a triangular cross-section that projects from the lower side of the outer wall portion.

The fixing portion 101C corresponds to the size of the dial plate 107 and fixes the dial plate 107 on the lower side. Collar 10
1D is a case body 10 with the conductive member 120 fitted.
The conductive member 120 is fixed to 1.

The windshield 102 is made of transparent glass so that the dial 107 and the like can be seen from outside the electronic timepiece 100. The back cover 103 has a hook-shaped protrusion 103A formed on the outer peripheral edge side of a flat plate-shaped member. This protrusion 10
3A engages with the back side opening 101B, and the back cover 103
Is fixed to the case body 101. In addition, the guide 1 that rises from the flat plate-shaped portion of the back cover 103 on the outer peripheral side of the movement 104 and reaches the approximately dial plate 107 on the back cover 103.
03B is provided. The guide 103B supports the movement 104 from the outer peripheral side, supports the dial plate 107 from the back side, and fixes the dial plate 107 so as not to wobble.

Here, in the movement 104, the watch CPU 14 and the drive circuit 1 described with reference to FIG.
8A and the drive mechanism 18B are incorporated. The movement 104 may have a built-in power source such as a battery or a large-capacity capacitor, if necessary. Also, the windshield 10
2, the dial 107 and the pointer portion such as the second hand 361, the minute hand 362, the hour hand 363, and the like constitute a display unit.

The dial 107 is fixed to the movement 104 with an adhesive or the like. More specifically, as shown in FIG. 8, the structure of the dial plate 107 is such that an insulating film 411 is provided on a solar cell substrate 410, an electrode film 412 is provided on the insulating film 411, and a solar cell 413 is further arranged to be transparent. An electrode 414 covers it. A covering member 416 is arranged above the transparent electrode 414 via a spacer 415.

The dial plate 107 has a structure in which the solar cell 413 is not directly hit even if the covering member 416 is warped or the covering member 416 bends due to an external impact or the like. Further, the dial plate 107 also serves to obscure the multi-stage dividing line of the solar cell 413. The spacer 415 is made of a material that does not transmit light.

A method of manufacturing the dial plate 107 will be described. The solar cell substrate 410 is made of a metal material such as stainless steel plate or brass. Next, an insulating film 411 is provided on the entire surface of the solar cell substrate 410 using a sputtering device. As the insulating film 411, a silicon oxide film is used.

Next, an electrode film 412 is provided using a sputtering device. The electrode film 412 may be formed on the entire surface of the insulating film 411 or may be formed partially.
Aluminum is used for the electrode film 412.

Next, the solar cell 413 is formed on the electrode film 412.
To form. This solar cell 413 is continuously formed by a plasma chemical vapor deposition apparatus. The solar cell 413 is made of amorphous silicon and has a conductivity type of p-i-
An n structure is taken. The solar cell 413 may be formed on the entire surface of the timepiece dial or may be partially formed. The solar cell 413 may use crystalline silicon as well as amorphous silicon. Further, in order to improve power generation performance, a tandem type in which amorphous silicon and crystalline silicon are laminated may be used.

Next, the transparent electrode 4 is formed on the upper surface of the solar cell 413.
14 is formed using a sputtering device. Indium tin oxide is used for the transparent electrode 414. Transparent electrode 41
4. A spacer 415 is fixed to the upper part of 4 by adhesion or the like.

After that, a covering member 416 having a time scale, characters, marks, etc. formed on one surface is attached to the spacer 415.
The solar cell substrate 410 is bonded to the upper part using an adhesive.
The dial 107 including the solar cell 420 including the insulating film 411, the electrode film 412, the solar cell 413, and the transparent electrode 414 is completed.

The electrode film 412 serves as a lower electrode of the solar cell 413, and the transparent electrode 414 serves as an upper electrode of the solar cell 413. In the covering member 416, the decorative pattern A 418 is provided on the upper surface of the transparent member 417, and the decorative pattern B 419 is provided on the lower surface of the transparent member 417. The decorative pattern A418 is partially covered on the upper surface of the translucent member 417 in order to collect light. The decorative pattern B419 is partially covered on the lower surface of the translucent member 417 so that light can reach the solar cell 413. In the embodiment, the solar cell substrate 41
The material of 0 is a metal material, but a film-shaped substrate such as plastic may be used. Here, it is preferable that the solar cell substrate 410 does not overlap the loop antenna 111 in plan view.

As the translucent member 417, a member capable of transmitting light rays such as visible light, infrared rays, far infrared rays and ultraviolet rays is used.
The main materials used are glass, plastic, ceramics, papers and cloths. Ceramics, paper, cloth,
A material having a light transmittance of about 30% or more is used.

As for the color of the translucent member 417, when the material is glass or plastic, colorless or transparent, colored semi-transparent, or achromatic semi-transparent material such as gray is used to provide a wide variety of design variations in color. Good to do. Above all, if a colorless and transparent material is used, the power generation performance can be most improved.

Therefore, it is preferable to use acrylic, polycarbonate, or the like for plastic, and printing with ink or three-dimensional decoration can be formed by injection molding.

In the case of glass, if sapphire glass is used, the timepiece can be made thinner in terms of strength and various decorations can be applied on the processed surface, so that various designs can be realized.
Examples of the method include printing with ink, three-dimensional decoration formation by etching, and metal decoration by sputtering.

Further, if a material such as quartz or calcite that causes birefringence of light is used, the decorative pattern is made to appear twice, so that the surface of the light transmissive member 417 is not provided with irregularities,
You can give a three-dimensional decoration.

Returning to FIGS. 6 and 7, the substrate 108 is a printed wiring board made of epoxy resin, phenol resin or the like reinforced with glass fiber or glass woven fabric if necessary, and flexible wiring made of polyimide resin or the like. It is composed of a substrate. A loop-shaped (in the illustrated example, two loops are wound on each of the front and back sides) loop antenna 111 is formed on both the front and back sides of the annular substrate 108. In the illustrated example, the loop antenna 111 is formed of a conductive pattern such as a copper foil fixed on the substrate 108.

Further, although the loop antenna 111 is formed in a loop shape which is wound several times in the drawing, the number of turns and the shape of the loop antenna are arbitrary. More specifically, when the frequency of the carrier wave is 13.56 [MHz], a loop antenna of 2 to 3 turns may be used, and when the frequency is 125 [kHz], several hundreds of turns are required. Become.

Since the loop antenna has a larger antenna gain as the aperture area increases, the loop antenna 111
Is preferably formed on the outer periphery of the case body 101 as much as possible. In this embodiment, the substrate 108 is formed in an annular shape along the inner surface of the case body 101.
A loop of the loop antenna 111 is formed on the upper outer peripheral side. The movement 104 is arranged in an opening provided inside the ring shape of the substrate 108.

Further, the above communication module 110IC is mounted on the board 108 and is connected to both ends of the loop antenna 111. The tuning capacitor 112 connected to the loop antenna 111 is also mounted on the substrate 108, but is not shown.

The conductive member 120 is made of a conductive material such as metal (stainless steel, brass, titanium, etc.) formed in a substantially annular shape so as to surround the case body 101,
The conductive member 120 is provided with a band attachment portion 140 (see FIG. 5) that spreads outward and has a structure to which a band for wearing on an arm can be attached.

Further, the conductive member 120 is provided with a concave groove 120B formed in the intermediate portion on the inner wall side. Further, in the conductive member 120, a part of the case body 101 in the circumferential direction is completely formed as an insulating portion that insulates the conductive member 120 in the circumferential direction when viewed in the circumferential direction of the conductive member 120. A gap 120G is provided that is configured to cut. The gap 120G is formed corresponding to the position where the crown 106 is attached. As described above, the crown 106, the operation switch A 106A, and the operation switch B 106B are provided at the positions of the conductive member 120 at 3 o'clock, about 10 o'clock, and about 7 o'clock, respectively.

That is, the conductive member 120 has a C-shaped planar shape with a gap 120G as a portion having conductivity, but the gap 120G has a structure filled with an insulating material. As a whole, it has an annular planar shape. The gap 120G prevents or reduces the generation of an eddy current, which will be described later, and may be as small as less than 1 mm, for example, about 0.1 mm to 1.0 mm. It has been confirmed that when the carrier wave of 13.56 [MHz] is used, the gap 120G is preferably 0.5 mm or more in order to secure sufficient insulation.
The concave groove 120B engages with the flange portion 101D of the case body 101.

In this embodiment, the back cover 103 and the dial plate 107 are made of an insulating material such as synthetic resin or ceramics in order to enable the propagation of radio waves between the loop antenna 111 and the outside of the case body. It is configured. As a result, an electromagnetic field of a radio wave is effectively formed in the opening of the loop antenna 111, so that a good communication state can be obtained.

When displaying the contents of communication during wireless communication, a display body 110DP composed of a liquid crystal display panel or the like is mounted on the substrate 108 as shown by a two-dot chain line in FIG. It is preferable to provide the dial 107 with an opening that exposes the display surface of the 110DP. As a result, the display body 110D exposed from the opening of the dial 107 is displayed.
It becomes possible to visually recognize the display content displayed on the display surface of P.

Further, as shown in FIG. 9, the loop antenna 111 in the present embodiment has a winding axis perpendicular to the paper surface, and the step motor 310 has a winding axis parallel to the paper surface. . FIG. 9 schematically shows the inside of the movement 104. The movement 104 includes a step motor 310, a train wheel 370, a power source 380, a crystal oscillator 381, an IC 382, and a conducting member 383 including a coil spring, etc., on a main plate 104A made of an insulating material. .

The step motor 310 is composed of a step motor 310A for moving the short hand and a step motor 310B for moving the long hand. The drive coils 311A of the step motor 310A and the step motor 310B,
It is preferable that the central axes of the 311B are arranged orthogonally to each other. Further, it is more preferable that the center axes of the drive coil 311A and the loop antenna 111 are orthogonal to each other, and the center axes of the drive coil 311B and the loop antenna 111 are orthogonal to each other. Is more preferable. Furthermore, the driving coil 311A
It is even more preferable that the central axes of the driving coil 311B and the loop antenna 111 are orthogonal to each other.

In the present embodiment, as shown in FIG. 9, the center axes of the magnetic fields generated by the drive coils 311A and 311B, which are indicated by the arrows, are indicated by alternate long and short dash lines. If α is set, α is 90 degrees. The magnetic field generated around the loop antenna 111 is also indicated by an arrow. The central axis of this magnetic field is the central portion of the loop antenna 111 on the paper surface.
The central axes of the magnetic fields of 11 are also drive coils 311A and 311B.
Form an angle of 90 degrees with respect to the central axis of the magnetic field. When the angle formed by the central axes of the magnetic fields generated by the drive coils 311A and 311B is α, α preferably intersects at 90 ° ± 30 °.

Further, a wheel train 370 is arranged in the center of the movement 104, a first gear 370A, a second gear 371A, a third gear 372A and a rotor 313A are arranged in this order on the step motor 310A side, and a step motor 310B side. The first gear 370, the second gear 371B, the third gear 3
72B and rotor 313B are arranged in this order. The first gear is arranged in the center of the electronic timepiece 100. The train wheel 370 transmits the rotation from each step motor 310 to move the short hand and the long hand.

The power supply 380 is a commercially available button battery in this embodiment. The power supply 380 supplies electric power to the step motor 310A, the step motor 310B, the crystal oscillator 381, and the IC 382.

The crystal oscillator 381 regularly sends drive pulses to the step motor 310A and the step motor 310B so that the step motor 310 operates regularly. IC382 is the watch CP of FIG.
Works the same as U14. That is, IC382
For controlling the entire timepiece function, for example, drive control of time information display means such as a pointer, display mode according to operation by an external operation means such as a winding stem, and internal time control are performed.

The conductive member 383 is connected to the electrode film 412 of the dial plate 107 (see FIG. 8) and supplies the electric power generated by the solar cell 413 to the crystal oscillator 381 and the IC 382.

(Operation of Electronic Timepiece 100) Next, the operation of the electronic timepiece 100 will be described. FIG. 10 shows an electronic timepiece 1
FIG. 10 is a sequence diagram showing a procedure of wireless communication between 00 and the external transmission / reception device 510. As shown in FIG. 10, the external transmission / reception device 510 normally transmits a polling signal (communication request) repeatedly (at a predetermined cycle) by the start-stop tuning protocol (step S101). More specifically, the control device 511 of the external transmission / reception device 510 includes the transmission circuit 51.
2 generates a polling signal, and continues to transmit the polling signal via the high frequency circuit 514 and the antenna 515. The electronic timepiece 100 starts communication when it enters the communication range of the external transmission / reception device 510 and receives the polling signal.

At the time of communication, first, data for mutual authentication is sent to the external transmitting / receiving apparatus 510 (step S10).
2) As a result, the mutual authentication period T01 starts. The external transmission / reception device 510 detects that the electronic timepiece 100 has entered the communication area of its own, and transmits data for mutual authentication to the electronic timepiece 100 (step S103). The electronic timepiece 100 that receives this data transmits response data indicating that the mutual authentication is completed to the external transmission / reception device 510 (step S104).

When mutual authentication is completed as described above,
The reading period T02 is entered, and the external transmission / reception device 510
Transmits read request data to read data from the electronic timepiece 100 (step S105). As a result, the electronic timepiece 100 reads out the corresponding data from the memory address in the memory 110M (see FIG. 3) corresponding to the read request data, and transmits it to the external transmitting / receiving device 510 (step S106).

When the memory data from the electronic timepiece 100 is received by the external transmission / reception device 510 as described above,
The determination period T03 starts. In the determination period T03, the external transmission / reception device 510 recognizes the data type of the ticket, prepaid card, or the like, the expiration date, and the like from the received data, and determines whether the content is acceptable (step S107). ).

When the above determination is completed, the external transmitter / receiver 5
10 shifts to the writing period T04, and transmits data such as the presence or absence of boarding and the payout amount to the electronic timepiece 100 (step S108). As a result, the electronic timepiece 100 transmits response data for notifying that the data has been received to the external transmitting / receiving device 510 (step S109).

Communication is completed by the above procedure, and the electronic timepiece 100 shifts to the internal processing period T05. This period T
In 05, the data content sent in step S108 is written to the corresponding memory address of the memory 110M, and necessary items are recorded (boarding record) or updated (balance data, etc.). On the other hand, the external transmitter / receiver 51
0 indicates the above step S109 in this period T05.
Then, the response data transmitted from the electronic timepiece 100 is confirmed, and then the next polling process is prepared (step S110).

In the mutual processing period T10 including the mutual recognition period T01, the reading period T02, the judgment period T03, the writing period T04, and the internal processing period T05, for example, the display body shown by the two-dot chain line in FIG. 110
When a DP is provided, the display 110DP communicates with
The communication processing stage or the contents of the communication processing (records such as boarding records and balance data or payout data) may be displayed. Further, when a display body such as a liquid crystal display panel is also configured to display time information as in a second embodiment described later, the mutual processing period T
At 10, the display of the time information may be temporarily stopped. At this time, instead of the time information, the communication state, the communication processing stage, or the communication processing content may be displayed.

A gap 120G is provided in a part of the ring shape of the conductive member 120. This is the conductive member 12
The generation of an eddy current (loop current) that occurs when the magnetic field in the direction in which the magnetic flux extends in the direction of extension of the axis of the 0 ring shape is prevented, and the transmission intensity and reception sensitivity of the transmission / reception radio waves of the above non-contact data communication are prevented. This is to suppress the decrease.

That is, when the ring-shaped conductive member 120 is made of a conductor and the gap as described above is not provided, as shown in FIG. 11, the external radio wave or the loop antenna 111 is used. When the magnetic field H in the vicinity of the conductive member 120 fluctuates periodically due to the radio waves generated by the magnetic field, the magnetic flux passing through the opening of the conductive member 120 changes, so that eddy current (loop current) I is generated by electromagnetic induction.
Occurs.

Since this eddy current I consumes the energy of radio waves, the eddy current I is used in the conductive member 120, specifically, in the case body 10.
1 reduces the reception sensitivity of the loop antenna 111 arranged inside the antenna 1 and the intensity of the radio wave transmitted from the loop antenna 111. In particular, when the axis of the conductive member 120 and the loop axis of the loop antenna 111 shown in FIG. 3 are installed substantially parallel to each other, the influence of the eddy current I becomes extremely large.

On the other hand, in the case of the present embodiment, as shown in FIG. 12, since the conductive member 120 is provided with the gap 120G in which the insulating member is provided, the eddy current I is not generated. Therefore, the energy loss of radio waves is also reduced,
It is also possible to suppress a decrease in transmission intensity or reception sensitivity during communication. Further, since the ring-shaped axis of the conductive member 120 and the loop axis of the loop antenna 111 are substantially aligned,
More specifically, since the loop of the loop antenna 111 exists concentrically inside the ring shape of the conductive member 120,
The conductive member 120 acts as a shield for the loop antenna 111, and functions as a known shielded loop antenna as disclosed in, for example, Japanese Patent Laid-Open No. 56-27509.

Also, the electronic timepiece 100 is returned to FIG. 5, and the crown 10 for switching a plurality of modes is set.
6. Operation switch A106A and operation switch B10, which are configured to perform setting operation in each mode
The mode of the electronic timepiece 100 is switched and operated by 6B. Specifically, when the crown 106 is rotated, each mode, that is, "TIME", "0", "CALEND"
ER ”,“ ALARM ”,“ DUAL1 ”,“ DUAL ”
2 ”switches. The display of this mode is performed by the display of the liquid crystal display provided on the dial. Usually, it is a TIME mode, that is, a mode for displaying the current time, in which the short hand indicates the time and the long hand indicates the minute.

In the 0 mode, zero adjustment is performed, the short hand is set to 0 by the operation switch A106A, and the operation switch B1 is set.
Set 0 for the long hand with 06B. In the CALENDER mode, the short hand indicates the month and the long hand indicates the day.

In the ALARM mode, when the alarm mode is set, the time when the alarm sound is generated can be set. That is, the short hand is moved by the operation switch A106A to set the alarm time, and the long hand is moved by the operation switch B106B to set the alarm minute.

The dual mode and dual mode are dual time settings, and the time of each place other than the local time can be set. For example, compared to Japan (Tokyo) standard time, New York, DU
You can set the time in London in AL2 mode. As a specific setting procedure, pull the crown 106, operate the operation switches A106A and B106B to set the foreign time, and push the crown 106 back to set the dual time.

According to this embodiment as described above, the following effects can be obtained. (1) Since the loop antenna 111 is arranged radially outward of the outer peripheral side of the movement 104, the loop antenna 111 is not covered by the movement 104, so that radio waves transmitted from the outside and The electric wave emitted from the electronic timepiece 100 itself is generated by the solar cell 4
Electrostatic shield or electromagnetic shield is not provided by 13, and radio wave transmission / reception efficiency of the non-contact type wireless communication unit 110 is secured.

(2) Since the central axes of the loop antenna 111 and the drive coils 311A and 311B of the step motor 310 are orthogonal to each other, the loop antenna 111 and the drive coils 311A and 311B are generated respectively. Since the magnetic fields do not interfere with each other, malfunction of the step motor 310 and the wireless communication unit 110 can be prevented.

(3) The electronic timepiece 100 has a wireless communication section 110.
And the step motor 310 can be incorporated.
Since the malfunction of the step motor 310 rarely occurs when the hands of the electronic timepiece 100 are driven by, the time error is unlikely to occur. (4) Since the solar cell substrate 410 is arranged above the substrate 108 and the loop antenna 111 is arranged below the substrate 108, the solar cell substrate 410 does not overlap the loop antenna 111 in plan view. Therefore, the solar cell substrate 410 does not interfere with the transmission and reception of radio waves of the loop antenna 111 due to electrostatic shielding or electromagnetic shielding.

(5) The base plate 104A is made of an electrically insulating material, and the loop antenna 111 is a conductive member such as a power source 380, a step motor 310, a solar cell substrate 410, which is a battery placed on the base plate 104A. Since they are arranged so as not to overlap each other in plan view, they are not shielded electrostatically or electromagnetically, so that the transmission and reception of radio waves of the loop antenna 111 due to the electrostatic shielding or electromagnetic shielding are not hindered.

(6) Interference between the loop antenna 111 and the magnetic field generated by the step motor 310 or the power source 38
0, the step motor 310, and the solar cell substrate 410 so as not to cause electrostatic shielding or electromagnetic shielding,
It is necessary to increase the outer diameter of the loop antenna 111,
Therefore, the loop antenna 111 has a size larger than that of the electronic timepiece 100, which is larger than necessary.
However, since it is arranged so as not to planarly overlap conductive members such as the power source 380, the step motor 310, and the solar cell substrate 410, which are members that cause electrostatic shielding or electromagnetic shielding, the planar size can be reduced. .

[Second Embodiment] Next, a second embodiment of the present invention will be described. In the following description, the same parts and members as those already described are designated by the same reference numerals to simplify the description. Electronic timepiece 200 according to the second embodiment of the present invention
13 differs from the electronic timepiece 100 according to the first embodiment (see FIG. 9) in the following points, as shown in FIG.

In the first embodiment, electric power is supplied from the power source 380 composed of a button battery, while in the second embodiment.
In the embodiment, the step motor 310 and the solar cell 4 are used.
This is different in that the power is generated in step 13 and the electric power stored in the capacitor 69, which is a storage battery, is once supplied.

Specifically, in the movement 104 according to the second embodiment, a rotation control means 70 is formed as shown in FIG. Rotation control means 70 of the present embodiment
Then, the stepping motor 310 is chopper-controlled to control the speed of the rotor 313 (FIG. 9) and to increase the voltage generated by the stepping motor 310.

The step motor 310 has one drive coil 311, and this drive coil 311 is used for power generation, rotation speed detection of the rotor 313, and braking. Here, the drive coil 311 of the step motor 310 and the loop antenna 111 are arranged such that their central axes are orthogonal to each other.

A solar cell 413 is connected in series to the drive coil 311, and the constant voltage circuit 620 is driven by the DC output obtained from these solar cells 413. At this time, the reference voltage (Vref) output from the constant voltage circuit 620 is smaller than the power generation voltage generated when the rotor 313 normally rotates, and is slightly smaller than the minimum voltage for reliably driving the rotation control means 70. It is set higher. It should be noted that the solar cells 413 may have one stage or may be arranged in two or more stages in series. If the solar cells 413 are arranged in a single stage and the chopper is boosted, the appearance quality of the dial can be improved as compared with the case where the solar cells 413 are arranged in series in a plurality of stages. If the solar cells are arranged in multiple stages in series,
Even if a translucent covering member is provided on the upper surface of the solar cell, the dividing line of the solar cell may be visible through the external appearance, but if the solar cell is arranged in a single stage, the aforementioned dividing line does not occur. It is possible to improve the appearance quality of the dial while making the covering member thin.

Then, the reference voltage of the constant voltage circuit 620,
The generated voltage in the drive coil 311 is compared with the comparator 63.
When the generated voltage is high, the H level signal is output, and when the generated voltage is low, the L level signal is output as a detection signal from the comparator 630 to the control circuit 76. Further, in the control circuit 76, the detection signal is sent to the AN through the AND circuit 640 and the inverter 650.
It is input to the D circuit 660.

On the other hand, the reference signal (1 Hz) from the frequency dividing circuit 73 is input to the AND circuits 640 and 660,
The AND circuit 640 outputs an up-count signal to the up-down counter 670 by sampling the detection signal every one second, or the AND circuit 6 outputs the up-count signal.
A down count signal is output from 60.

The up / down counter 670 is composed of a several-bit counter and has output terminals Q _{0 to} Q _n . Based on the counter value, the up / down counter 670 outputs a selection signal from any one of the output terminals Q _{0 to} Q _n , which is input to the combinational logic circuit 680. The combinational logic circuit 680 receives a signal of 32 kHz from the oscillation circuit 72, a signal of 16 kHz from the frequency dividing circuit 73, and a signal of another frequency. By combining these signals, the selection signal To the switch 690.

The rotation control means 70 configured as described above
Then, when the rotor 313 rotates normally, the generated voltage in the step motor 310 is larger than the reference voltage of the constant voltage circuit 620, and therefore the comparator 630 outputs an H level signal. This H level signal is output to the AND circuit 64.
0 is directly input as an H level signal, but AN
The D circuit 660 is inverted by the inverter 650 and input as an L level signal. Therefore, in this case, the up count signal of 1 Hz is output only from the AND circuit 640, and the up / down counter 670 increases the counter value. After that, the up / down counter 670 outputs a selection signal based on the counter value to the combination logic circuit 680, and the combination logic circuit 680 outputs a chopper signal having a frequency corresponding to the selection signal to the switch 690.

The switch 690 is repeatedly turned on / off by the chopper signal, and both ends of the drive coil 311 are intermittently short-circuited. That is, when the switch 690 is turned on by the chopper ring, a short brake is applied to the step motor 310 to adjust the rotor 313 to the low speed side, and energy is accumulated in the drive coil 311. On the other hand, when the switch 690 is turned off, the generator operates, and a power generation voltage to which the energy accumulated in the driving coil 311 is added is generated, and the capacitor 69 is charged as the boosted voltage of the power generation voltage. . The electric power charged in the capacitor 69 is used as the electric power for moving the movement 104.

According to this embodiment as described above, the following effects are obtained in addition to the effects of the first embodiment described above. (7) Since the step motor 310 also functions as a generator, the step motor 310 generates electricity for operating the electronic timepiece 200 as a generator, and therefore does not require a power source such as a button battery and is environmentally friendly. It can be an electronic watch.

(8) If the solar cells 413 are arranged in one stage and the chopper is boosted, the appearance quality of the dial can be improved as compared with the case where a plurality of stages are arranged in series. (9) When the solar cells 413 are arranged in a plurality of stages in series, the dividing lines of the solar cells may be seen through even though the translucent coating member is provided on the upper surface of the solar cells. When the solar cell 413 has a single stage, the above-mentioned dividing line does not occur, so that it is possible to improve the appearance quality of the dial while reducing the thickness of the translucent covering member.

[Third Embodiment] An electronic timepiece 300 according to a third embodiment of the present invention is, as shown in FIGS. 14 and 15, an electronic timepiece 100 according to the first embodiment (see FIG. 9) in the following points. ) Different.

In the first embodiment, electric power is supplied from the power source 380 composed of a button battery, and the electric power is driven by this electric power, whereas in the third embodiment, the mechanical energy stored in the mainspring is used for driving. Different in points. The time control is common in that it is performed by an electronic circuit.

Specifically, instead of the power source 380, a capacitor 826 is provided in the third embodiment, and the step motor 310 and the train wheel 370 are arranged in the third embodiment as shown in FIG.
It is arranged as shown in FIG.

A barrel wheel 831 comprising the mainspring, barrel barrel gear, barrel barrel and barrel barrel cover of the third embodiment is provided. The mainspring has an outer end fixed to the barrel wheel and an inner end fixed to the barrel holder. The barrel box 834 is supported by the main plate and the train wheel bridge, and the barrel wheel 834
It is fixed by a square hole screw 835 so as to rotate integrally with. The ratchet wheel 834 meshes with the spigot 836 so as to rotate clockwise but not counterclockwise.

The rotation of the barrel wheel is increased by a speed increasing gear train 817 including a second wheel & pinion 807, a third wheel & pinion 808, a fourth wheel & pinion 809, a fifth wheel & pinion 810, and a sixth wheel & pinion 811 to adjust the speed. 820
Be transmitted to.

The center pinion 807 of the speed increasing wheel train 817 is fixed to the cannon pinion, the minute hand is fixed to the pinion pinion 809, and the second hand is fixed to the fourth wheel & pinion 809. That is, pointers such as the minute hand and the second hand are connected to the speed increasing wheel train 817 and driven as the wheel train 817 rotates.

The speed governor 820 of the electronic timepiece 300 is an electromagnetic brake type speed governor composed of a magnet and a coil, and is specifically constituted by a rotor 812, a stator 815, and a coil block 816. In addition, the speed governor 820
Also has the function of a generator. In addition, the speed governor 82
The 0 coil block 816 and the loop antenna 111 are arranged such that their central axes are orthogonal to each other.

The rotor 812 comprises a rotor magnet 812a, a rotor pinion 812b, and a rotor inertia disk 812c. The rotor inertial disk 812c is for reducing fluctuations in the rotational speed of the rotor 812 with respect to fluctuations in the driving torque from the barrel wheel 831.

In the coil block 816, a coil 816b is attached to a magnetic core 816a in which a part 816c of the stator is integrated.
Is wound. The stator 815 has a magnetic core 816.
The rotor 812 is attached to the stator 816c formed by a part of a.
The coil block 816 is arranged on the opposite sides with the screw 821 interposed therebetween and is fixed to the other end of the coil block 816 and the main plate with a screw 821. Here, the stator 815, the magnetic core 816a, and the stator 816c integrated with the magnetic core 816a are made of PC permalloy or the like. Further, the coil 816b is configured to detect the number of revolutions of the rotor 812 by detecting the fluctuation of the output voltage.

FIG. 15 shows an electronic timepiece 300 according to this embodiment.
A block diagram showing the configuration of is shown. Electronic clock 30
0 is a mainspring 831a as a mechanical energy source,
A speed increasing wheel train 817 that transmits the torque of the mainspring 831a to the speed governor 820, and a pointer 818 that is a time display device that is connected to the speed increasing wheel train 817 and displays the time.

The speed governor 820 is driven by the mainspring 831a via the speed increasing wheel train 817 to generate induced electric power and supply electric energy. The AC output from the speed governor 820 is boosted and rectified through the rectifier circuit 825,
The capacitor (power storage device) 826 is charged and supplied.

The rotation control device 85 formed of a one-chip IC by the electric power supplied from the capacitor 826.
0 is driven. This rotation control device 850, as shown in FIG. 15, includes an oscillation circuit 851 and a rotor rotation detection circuit 8
52 and a brake control circuit 853.

The oscillation circuit 851 outputs an oscillation signal (32768 Hz) by using the crystal oscillator 851A which is a time standard source, divides this oscillation signal by a predetermined frequency dividing circuit, and outputs it as a reference signal fs to the control circuit 853. Is output to.

The rotation detection circuit 852 detects the rotation speed of the rotor from the power generation waveform output from the speed governor 820, and outputs the rotation detection signal FG1 to the control circuit 853. The control circuit 853 controls the rotation detection signal F with respect to the reference signal fs.
A brake signal is input to the generator (governor) 820 based on the phase difference of G1 or the like to adjust the speed.

According to this embodiment as described above, the following effects are obtained in addition to the effects of the above embodiment. (10) Since the speed governor 820 also serves as a generator, the generator generates electricity for operating the electronic timepiece 300. Therefore, when the solar cell 413 cannot generate power, Since the backup power can be generated, the electronic timepiece 300 can be continuously operated.

The present invention is not limited to the above-described embodiments, and modifications and improvements within the range in which the object of the present invention can be achieved are included in the present invention. For example, in each of the above embodiments, the loop antenna 111 is provided in the outer peripheral direction of the movement 104, but the present invention is not limited to this, and may be provided on the front and back surfaces of the translucent member 417 of the dial 107. It may be provided on at least one of the front surface and the back surface of the windshield 102.

In this case, the loop antenna 111 and the loop antenna 111
The bment 104 is provided at a different position in the thickness direction of the case body 101, and even if the loop antenna 111 and the movement 104 are two-dimensionally overlapped with each other, an electric wave transmitted from the outside or an electronic timepiece. Since the radio waves emitted from 100 itself are sneak and transmitted / received, the solar cells 413 are not electrostatically shielded, and the radio transmission / reception efficiency of the non-contact wireless communication unit 110 is secured. To be

Further, since the loop antenna 111 is formed in an annular shape, by providing it on the periphery of the windshield 102,
It is also possible to obtain the effect that the visibility of the dial 107 of the electronic timepiece 100, 200, 300 is not reduced and the appearance can be improved. Further, in the above-described embodiment, the main plate 104A refers to the bottom surface portion of the movement, that is, the case body 1
Although it is a separate body from 01, it is not limited to this, and in the case of a structure in which the case and the back cover of the watch are integrated, or the case, the back cover and the band are integrated with an insulating material, the case shown in FIG. Parts such as the train wheel and the step motor as shown may be arranged, and the concept also includes a base frame formed by integrally molding the arranged parts. In addition, the specific structure, shape, and the like when carrying out the present invention may be other structures and the like as long as the object of the present invention can be achieved.

[0120]

According to the present invention, since the loop antenna is arranged radially outside the outer peripheral side of the movement, the loop antenna is not covered by the movement. Radio waves sent from the watch and radio waves emitted from the watch itself are not electrostatically or electromagnetically shielded by the solar battery cells, and the radio wave transmission / reception efficiency of the non-contact type wireless communication device is secured.

[Brief description of drawings]

FIG. 1 is a schematic explanatory diagram showing a usage aspect of an embodiment of a communication system including an electronic timepiece having a wireless communication function according to the present invention.

FIG. 2 is a block diagram showing a schematic configuration of an external transmission / reception device in a communication system.

FIG. 3 is a block diagram showing a schematic configuration of a wireless communication unit of the electronic timepiece.

FIG. 4 is an explanatory diagram schematically showing a schematic configuration of a time information display processing unit of the electronic timepiece.

FIG. 5 is a plan view schematically showing the external structure of the electronic timepiece according to the first embodiment of the present invention.

FIG. 6 is a vertical sectional view schematically showing the internal structure of the electronic timepiece according to the first embodiment of the present invention.

FIG. 7 is a cross-sectional view schematically showing the internal structure of the electronic timepiece according to the first embodiment.

FIG. 8 is a vertical sectional view schematically showing the internal structure of the dial according to the first embodiment of the present invention.

FIG. 9 is a plan view showing the internal structure of the electronic timepiece according to the first embodiment of the present invention.

FIG. 10 is a sequence diagram showing a communication procedure of the communication system.

FIG. 11 is an explanatory diagram showing a phenomenon when a case body in a conventional electronic timepiece is arranged in a fluctuating magnetic field.

FIG. 12 is an explanatory diagram showing a phenomenon when the case body of the present invention is arranged in a fluctuating magnetic field.

FIG. 13 is a circuit diagram showing an internal structure of an electronic timepiece according to a second embodiment of the present invention.

FIG. 14 is a diagram showing an internal structure of a speed governor of an electronic timepiece according to a third embodiment of the present invention.

FIG. 15 is a block diagram showing a configuration of an electronic timepiece according to a third embodiment of the present invention.

[Explanation of symbols]

100, 200, 300 ... Electronic timepiece, 101 ...
Case body, 102 ... Windshield, 104 ... Movement 107 ... Dial, 110 ... Wireless communication part, 11
DESCRIPTION OF SYMBOLS 1 ... Loop antenna, 310 ... Step motor, 311 ... Driving coil, 420 ... Solar cell, 510 ... External transmission / reception device

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H01Q 1/40 H01Q 1/40 1/44 1/44 7/00 7/00 F term (reference) 2F002 AA00 AB02 AB03 AB04 AC01 AE00 BB04 GA06 2F082 AA00 BB00 EE02 EE03 EE05 EE06 EE08 FF01 JJ00 2F084 AA00 BB06 FF00 5J046 AA01 AA02 AA04 AA07 AA12 AA13 AB11 QA02 SA06 5J047 AA02 AA04 AA07 AA08 AA13 AA19 AB11 EF02

Claims (10)

[Claims] 1. A movement for driving a time display means,
An electronic timepiece comprising: a solar cell that generates electric power for operating the movement; a case that houses the movement; and a windshield that covers the time display means side of the movement. A wireless communication unit for performing wireless communication with another transmission / reception device provided outside the electronic timepiece is housed, and the wireless communication unit has a loop antenna formed in a ring shape and wireless communication via the loop antenna. An electronic timepiece comprising: a transmitting / receiving unit for performing the operation, wherein the loop antenna is arranged radially outside of an outer peripheral edge side of the movement. 2. The electronic timepiece according to claim 1, wherein the movement includes an electromagnetic converter, the electromagnetic converter includes a coil configured by being wound, the loop antenna and the loop antenna. A coil is an electronic timepiece in which central axes of the coils are arranged orthogonally to each other. 3. The electronic timepiece according to claim 2, wherein the electromagnetic converter is a motor. 4. The electronic timepiece according to claim 2, wherein the electromagnetic converter is a generator. 5. The electronic timepiece according to claim 1, wherein the loop antenna is provided on at least one of a front surface and a back surface of the windshield. . 6. A movement for driving a time display means,
An electronic timepiece comprising: a solar cell that generates electric power for operating the movement; a case that houses the movement; and a windshield that covers the time display means side of the movement. A wireless communication unit for performing wireless communication with another transmission / reception device provided outside the electronic timepiece is housed, and the wireless communication unit has a loop antenna formed in a ring shape and wireless communication via the loop antenna. An electronic timepiece comprising: a transmitting / receiving unit for performing the operation, wherein the loop antenna and the movement are provided at different positions in the thickness direction of the case. 7. The electronic timepiece according to claim 6, wherein the movement includes an electromagnetic converter, and the electromagnetic converter includes a coil configured by being wound, the loop antenna and the loop antenna. A coil is an electronic timepiece in which central axes of the coils are arranged orthogonally to each other. 8. The electronic timepiece according to claim 7, wherein the electromagnetic converter is a motor. 9. The electronic timepiece according to claim 7, wherein the electromagnetic converter is a generator. 10. The electronic timepiece according to any one of claims 6 to 9, wherein the loop antenna is provided on at least one of the front surface and the back surface of the windshield. .