JP2006030211A - Identification tag for wrist watch, and wrist watch containing this tag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wrist watch having superior characteristics in an environmental capability, by obtaining an identification tag which can be built in the wrist watch and can operate normally. <P>SOLUTION: The identification tag is built in a clock case 15 and is prepared a IC chip 23, which is connected with an antenna 22 and a coil 22 electrically and can memorize a specific information on an wearer. The antenna coil 22 contains a magnetic core part 22a and coil part 22b which is wound on the magnetic core part 22a. A ferrite plate, a specified compound material or a thin film or a laminate of a thin plate of a soft magnetic metal are used as the magnetic core part. As for the wrist watch, the identification tag 21 is built in the clock case 15. Either or both of a case side 13 and a cover 16 of the clock case can be made with a non-magnetic material and a metal of electrical resistance over higher than 40×10<SP>-8</SP>Ωm. The cover body is screwed on the case side with a predetermined clearance, or the cover body is fitted on the case side, or the cover is screwed on the case side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an identification tag built in a wristwatch and a wristwatch incorporating the identification tag.

  Conventionally, there is a plate such as an identification card or a name tag for visually confirming a person or an article. However, only a very limited amount of information can be displayed on the plate. For this reason, in recent years, a tag having an electronic identification function using an RFID (Radio Frequency Identification) technology is known. The identification tag has an IC chip and an air-core antenna coil electrically connected to the IC chip. When the identification tag is attached to the plate, the information stamped on the surface of the plate is visually observed. In addition to being able to confirm, various information can be stored in the IC chip. For example, the tag-attached plate is attached to a person or an article, information stored in the IC chip is automatically taken out, and the person or the article can be managed in or out.

Recently, such an identification tag has been used as an identification device for entering a gate at a lift landing at a ski resort or a gate at a play facility at various amusement parks. If an identification tag is used for identification at such a gate, passengers trying to get on a lift or boarding an amusement device can use the tag with a simple operation to bring it closer to the identification means provided on the gate. Can be identified as a passenger.
On the other hand, a passenger who rides a lift or a passenger who rides an amusement device usually wears a wristwatch that displays time on his arm. For this reason, attempts have been made to incorporate an identification tag in the wristwatch. If this identification tag can be built into the wristwatch, it is not necessary to carry a separate and independent identification tag separately from the wristwatch, and the identification tag can be worn on the arm without a sense of incongruity. Expected to expand.

  However, the wristwatch is made relatively small because it needs to be worn on a person's arm, and there is not enough space for the built-in tag inside. There is a bug that needs to be enlarged. In addition, a movement made of metal and a battery that is both conductive and ferromagnetic are built into it, so even if an identification tag can be built in, the loss of the antenna coil increases due to the movement and battery. However, there is a problem that the IC chip does not operate normally due to fluctuation of the resonance frequency.

In addition, when an identification tag is built in, even if the watch case is made of resin, radio waves can be transmitted to and received from the identification means provided outside due to the movement. There was a defect that shortened. In addition, the resin case is notably deformed due to temperature, has a defect that it is relatively easy to get scratches and the like, and has a problem of high-grade appearance. For this reason, when the watch case that constitutes the exterior of the watch is made of metal in pursuit of environmental resistance characteristics, eddy currents are generated in the watch case by radio waves transmitted toward the antenna coil, and this eddy current There is also a problem that the identification tag does not operate due to the influence.
An object of the present invention is to provide a wristwatch identification tag that can be incorporated in a wristwatch and can operate normally.
Another object of the present invention is to provide a wristwatch having a built-in identification tag that is excellent in environmental resistance characteristics and in which the identification tag operates reliably.

As shown in FIG. 1, the invention according to claim 1 includes an IC chip 23 built in a watch case 15 and electrically connected to the antenna coil 22 and the coil 22 and capable of storing information unique to the wearer of the watch. It is an improvement of a tag for identification of a wristwatch equipped with.
The characteristic configuration is that the antenna coil 22 includes a magnetic core member 22a and a coil portion 22b wound around the magnetic core member 22a.
In the wristwatch identification device according to the first aspect, when the identification means is brought close to the antenna coil 22 and a radio wave of a predetermined frequency is transmitted, the antenna coil 22 and the IC are caused by the mutual induction action of the antenna coil 22 of the identification tag 21. The resonant circuit constituted by the chip 23 resonates and the IC chip 23 is activated. Since the antenna coil 22 includes the magnetic core member 22a and the coil portion 22b, the antenna coil 22 can be formed flat, and the antenna coil 22 can be accommodated in the internal space of the wristwatch by being formed relatively thin. Get a unique identification tag.

The invention according to claim 2 is the invention according to claim 1, wherein the magnetic core member 22a is an identification tag for a wristwatch made of a ferrite plate.
The invention according to claim 3 is the invention according to claim 1, wherein the magnetic core member 22a is an identification tag for a wristwatch made of a composite material of ferrite powder and plastic or rubber.
The invention according to claim 4 is the invention according to claim 1, wherein the magnetic core member 22a is a wristwatch identification tag formed by laminating thin films or thin plates of soft magnetic metal.
The invention according to claim 5 is the invention according to claim 1, wherein the magnetic core member 22a is an identification tag for a wristwatch made of a composite material of soft magnetic metal powder or flakes and plastic or rubber.

The invention according to claim 6 is the invention according to claim 1, wherein the magnetic core member 22a is an identification tag for a wristwatch made of a composite material of ferrite powder, soft magnetic metal powder or flake and plastic or rubber. .
The invention according to claim 7 is the invention according to any one of claims 4 to 6, wherein the soft magnetic metal is an amorphous alloy, permalloy, electromagnetic soft iron, silicon steel plate, sendust alloy, Fe-Al alloy, carbonyl iron or reduced iron. This is an identification tag for a wristwatch formed by any of the above.
The invention according to claim 8 is the invention according to any one of claims 1 to 7, wherein the magnetic core member 22a corresponds to a polygonal plate or inner diameter formed corresponding to the inner diameter of the watch case 15 of the wristwatch. Thus, the wristwatch identification tag is a square plate with rounded edges.

  The wristwatch identification tag according to any one of claims 2 to 7 includes the antenna coil 22 and the IC chip 23 even if a movement or a battery made of a metal body is present around the antenna coil 22. The change in the impedance of the resonance circuit is minimized, and the change in the resonance frequency is suppressed. In the invention according to claim 8, the antenna coil 22 can be enlarged corresponding to the size of the watch case 15, and the magnetic core member 22a having a necessary cross-sectional area is obtained, so that the antenna can be incorporated even in a wristwatch. A watch identification tag is obtained in which the coil can operate normally.

According to a ninth aspect of the present invention, there is provided a timepiece case 15 comprising a case side body 13 having a glass 14 attached to one opening 13a and a lid 16 closing the other opening 13b of the case side body 13. 8 A wristwatch incorporating an identification tag 21 according to any one of the above, wherein either one or both of the case side body 13 and the lid body 16 is nonmagnetic and has an electric resistance of 40 × 10 ⁻⁸ Ωm or more. It is made with.
In the wristwatch described in claim 9, the watch case is less likely to be scratched as compared with the case made of resin, and the environmental resistance characteristics of the watch itself can be improved. On the other hand, if the metal constituting the watch case is non-magnetic and the electric resistance is 40 × 10 ⁻⁸ Ωm or more, the eddy current generated by the radio wave is compared with the metal having an electric resistance of less than that. Therefore, the radio wave is prevented from being absorbed by the watch case 15 to prevent the identification tag from being inactivated due to the generation of eddy current.

Examples of the non-magnetic metal having an electric resistance of 40 × 10 ⁻⁸ Ωm or more include Ni or Cr alloys such as hastelloy and stellite, titanium alloys, and carbide sintered materials. Also, austenitic stainless steel such as SUS304, pure titanium, or the like can be used. Austenitic stainless steel is suitable for this application because it is substantially non-magnetic and has a high electric resistance except when it is subjected to plastic working in the cold and is not annealed. Many Ni alloys and Co alloys are non-magnetic. Hastelloy is non-magnetic, has high electric resistance and good corrosion resistance, and is suitable for this application. Stellite is also suitable for this application because it is non-magnetic, has high electrical resistance, good corrosion resistance, and is hardly scratched. Titanium and titanium alloys are suitable because they are completely non-magnetic and have high electrical resistance, high strength and light weight. Further, since these materials have high strength and excellent corrosion resistance, it is not necessary to expect a reduction in thickness due to corrosion, so that there is an advantage that the thickness can be reduced from the beginning. If the thickness is reduced, not only the watch itself becomes light, but also radio waves can be transmitted securely and the identification tag 21 can be operated reliably.

In addition, sintered bodies of carbides, nitrides and borides (tungsten carbide, tantalum carbide, chromium carbide, titanium carbide, titanium nitride, titanium boride, etc.) are non-magnetic, have high electrical resistance, are hard and are not easily damaged, Since it can be made a beautiful surface by appropriate grinding, it is an effective metal particularly for improving the appearance of the appearance. However, in these sintered bodies, a metal using a ferromagnetic material such as cobalt as a binder cannot be used.
The preferable electric resistance of the metal constituting the watch case is 100 × 10 ⁻⁸ Ωm or more.

The invention according to claim 10 is the invention according to claim 9, wherein the lid body 16 is screwed to the case side body 13 through the ring-shaped packing 32 with a gap w of 0.01 mm or more and 1 mm or less. It is a watch.
The invention according to claim 11 is the invention according to claim 9, wherein, as shown in FIG. 5, a male screw 53d is formed on the periphery of the other opening 53b of the case side body 53 and can be screwed into the male screw 53d. This is a wrist watch in which a female screw 56 b is formed around the lid body 56, a male screw 53 d is screwed to the female screw 56 b, and the lid body 56 is screwed to the case side body 53.
The invention according to claim 12 is the invention according to claim 9, wherein, as shown in FIG. 8, a ring-shaped flange 76a is formed on the lid 76, and a receiving portion 73d to which the flange 76a can be fitted is a case. The wristwatch is formed on the peripheral edge of the other opening of the side body 73 and has a flange 76a fitted to the receiving portion 73d and the lid 76 attached to the case side body 73.
In the wristwatch described in claim 10, radio waves circulate from the gap w between the case side body 13 and the lid body 16, and in the wristwatch described in claim 11, the lid body 56 can be easily attached. In the invention according to claim 12, the structure can be simplified and a relatively inexpensive watch can be obtained.

A thirteenth aspect of the invention is the wristwatch according to any of the ninth to twelfth aspects, wherein the case side body or the lid near the magnetic pole of the antenna coil 22 of the identification tag 21 of the wristwatch is formed thin. is there.
The invention according to claim 14 is the invention according to any one of claims 9 to 13, wherein the axis of the antenna coil 22 of the watch identification tag 21 coincides with the radial direction of the watch case 55 as shown in FIG. It is a wristwatch configured to do.
The invention according to claim 15 is the watch according to any one of claims 9 to 14, wherein the wristwatch is provided with a display portion 23m for displaying information stored in the IC chip 23 of the identification tag 21 of the wristwatch. .
In the wristwatch described in claim 13, since the magnetization axis of the magnetic core member 22a is in the in-plane direction of the magnetic core member 22a, the portion formed thin even when the antenna coil 22 is attached to the watch case 55. It is possible to receive radio waves reliably from. In the invention according to the fourteenth aspect, the magnetic flux from the antenna coil 22 can be made parallel to the movement to avoid the influence caused by the magnetic flux passing through the movement, and the radio wave is transmitted from between the case side body and the lid. It can be received reliably. In the invention according to the fifteenth aspect, the information stored in the IC chip 23 can be visually recognized.

  As described above, in the identification tag for a wristwatch according to the present invention, since the antenna coil includes the magnetic core member and the coil portion wound around the magnetic core member, the antenna coil can be formed flat. By forming the antenna coil relatively thin, an identification tag that can be accommodated in the internal space of the wristwatch can be obtained. Further, as a magnetic core member, a ferrite plate, a composite material of ferrite powder and plastic or rubber, a laminate of a thin film or thin plate of soft magnetic metal, a composite material of soft magnetic metal powder or flake and plastic or rubber, or ferrite powder Even if there are movements and batteries made of metal around the antenna coil, it is composed of the antenna coil and IC chip. The change in the impedance of the resonance circuit is minimized, the change in the resonance frequency is suppressed, and a wristwatch identification tag that allows the antenna coil to operate normally even when incorporated in the wristwatch can be obtained.

On the other hand, in the wristwatch incorporating the identification tag according to the present invention, either or both of the case side body and the lid body are made of a non-magnetic metal having an electric resistance of 40 × 10 ⁻⁸ Ωm or more. The case is less likely to be scratched than a resin case, and the environmental resistance of the watch itself can be improved. On the other hand, since the electric resistance is 40 × 10 ⁻⁸ Ωm or more, the eddy current generated by the radio wave is less than that of a metal having an electric resistance lower than that, and for identification due to the generation of eddy current. It is possible to prevent the tag from being inactivated. Also, if the lid is screwed to the case side body with a predetermined gap, radio waves will circulate through the gap, and if the lid is screwed to the case side body, the lid body can be easily attached. If it is fitted to the case side body, the structure of the watch case can be simplified. Further, if a wristwatch is provided with a display unit for displaying information stored in the identification tag, the wristwatch wearer himself / herself can visually recognize the information.

Next, a first embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 3, a wristwatch 10 with a belt has one end of a belt 12, 12 attached to both sides of the wristwatch 11, and the belt 12, 12 is wrapped around a wearer's arm and the other end of each belt 12, 12 is attached. The wristwatch 11 is configured to be worn on its arm by being connected to each other. As shown in FIGS. 1 and 3, the wristwatch 12 includes a case side body 13 having a glass 14 (FIG. 1) attached to one opening 13 a and a lid that closes the other opening 13 b of the case side body 13. A watch case 15 made of 16 is provided, and a dial 17 is provided on the case side body 13 with a predetermined distance from the glass 14. The wristwatch 11 in this embodiment is a so-called analog wristwatch 11, and an hour hand 18 and a minute hand 19 are provided on the dial 17, and the hour hand 18 and the minute hand 19 are driven below the dial 17. A movement 20 (FIG. 1) is provided. Although not shown, the movement 20 is provided with a time display means for displaying the time by rotating the hour hand 18 and the minute hand 19 and a button battery as a power source for driving the time display means.

  As shown in FIGS. 1 and 2, the wristwatch 11 is provided with an identification tag 21 built in a watch case 15. The identification tag 21 includes an antenna coil 22 and an IC chip 23 electrically connected to the coil 22. Information unique to the wearer of the wristwatch 11 is stored in the memory 23f (FIG. 4) of the IC chip 23. The antenna coil 22 of the identification tag 21 is wound around the magnetic core member 22a and the magnetic core member 22a. A coil portion 22b. As the magnetic core member 22a, (1) a laminated body in which a plurality of thin films or thin plates of soft magnetic metal and an insulating thin film are alternately laminated, or a plurality of thin films or thin plates of soft magnetic metal whose surfaces are insulated are superposed. (2) Soft magnetic metal powder or composite of flake and plastic, (3) Soft magnetic metal powder or composite of flake, ferrite and plastic, (4) Ferrite powder and plastic And (5) ferrite plate. Among the above (1) to (5), it is preferable to use, as the magnetic material, a soft magnetic metal whose permeability does not change depending on the ambient temperature and whose resonance frequency does not change when the antenna coil 22 forms a resonance circuit. The shape is preferably a thin film, powder or flakes so that eddy currents are not generated when the resonance frequency is high and the resonance characteristics are not deteriorated.

The soft magnetic metal thin film of (1) above is a film having a thickness of 5 to 250 μm formed of iron-based amorphous, cobalt-based amorphous, permalloy or silicon steel, and the insulating thin film is made of polyester film, polyvinylidene chloride, polychlorinated chloride. It is an insulating resin film having a thickness of 5 to 50 μm, such as vinyl and polyethylene terephthalate (PET). The insulating thin film may be insulating paper.
Carbonic acid powder or reduced iron powder is used for the soft magnetic metal powder of (2) or (3) above, and the soft magnetic metal flakes are made by atomizing iron, permalloy, amorphous alloy, etc. After molding the soft magnetic metal powder, flakes obtained by mechanically flattening the soft magnetic metal powder are used.

As a method for producing a composite material of soft magnetic metal and plastic, a mixture of soft magnetic metal powder or flakes and plastic powder such as nylon resin, polyethylene resin, acrylic resin, vinyl chloride resin is kneaded, and this kneaded product is mixed. A method of forming into a predetermined shape by injection molding after pelletization is suitable. In this case, the characteristics of the identification tag 21 can be further improved by applying a magnetic field in the magnetic direction when the mixture is injected and aligning the soft magnetic metals. Alternatively, a soft magnetic metal powder or a mixture of flakes and plastic powder may be formed into a plate shape with a roll and then cut into strips, compression-molded, or cast into a mold. In any of the above methods, the characteristics are improved by aligning the soft magnetic metals by applying a magnetic field.
When the soft magnetic metal is a powder, the diameter thereof is preferably in the range of 0.1 to 30 μm, and more preferably in the range of 0.3 to 5 μm. When the soft magnetic metal is flakes, the thickness is preferably in the range of 0.1 to 10 μm, and more preferably in the range of 0.3 to 5 μm. When the diameter of the soft magnetic metal powder is smaller than the above range, the powder is likely to be oxidized, and when it is too large, there is a problem that loss due to eddy current increases.

The mixing ratio of plastic and soft magnetic metal is preferably 10 to 95% by weight of soft magnetic metal, and more preferably 40 to 90% by weight. The balance is plastic. If the content of the soft magnetic metal is less than the above range, there is a problem that the magnetic permeability is too low. If the content exceeds the above range, the soft magnetic metal is in direct contact with each other and the magnetic core member 22a becomes conductive, resulting in a large loss. is there. On the other hand, if a soft magnetic metal powder or flakes having a soft magnetic metal surface coated with an insulating film such as a phosphoric acid compound, glass, or oxide is used, there is little loss due to conductivity. It is preferably 5% by weight. However, when using injection molding, it is preferably 90% by weight to 95% by weight, and when using compression molding, it is preferably 95% by weight to 98% by weight.
The coil portion 22b wound around the magnetic core member 22a is a conductive wire made of copper, copper alloy (Cu—Cr, Cu—Be, Cu—Zn), aluminum or the like having excellent conductivity. This conductor is preferably covered with an insulating film.

  The IC chip 23 is bonded to the end of the magnetic core member 22a. As shown in FIG. 4, the power supply circuit 23a, the radio frequency (RF) circuit 23b, the modulation circuit 23c, the demodulation circuit 23d, the CPU 23e, A memory 23f that is connected to the CPU 23e and stores information specific to the plate cylinder 19; The power supply circuit 23 a contains a capacitor (not shown), and this capacitor forms a resonance circuit together with the antenna coil 22. This capacitor is charged with electric power generated by the mutual induction when the antenna coil 22 receives a radio wave having a specific frequency (frequency at which the resonance circuit resonates). The power supply circuit 23a rectifies and stabilizes this electric power, supplies it to the CPU 23e, and activates the IC chip 23. The memory 23f includes a ROM (read only memory), a RAM (ramdom-access memory), and an EEPROM (electrically erasable programmable read only memory), and a read command by radio wave data communication from the identification means 26 described later under the control of the CPU 23e. The stored data is read in response to the data, and the data is written in response to the write command from the identification means 26.

As shown in FIG. 1, the identification tag 21 is accommodated between a movement 20 and a lid 16 in a state of being sandwiched by a resilient cushioning material 31 such as a rubber sheet, and in this state, the lid 16 Is attached to the case side body 13. The axis of the antenna coil 22 of the identification tag 21 accommodated in this way coincides with the radial direction of the watch case 15, and the case side body 13 and the lid body 16 in this embodiment are both non-magnetic and electrically It is made of stainless steel, which is a metal having a resistance of 40 × 10 ⁻⁸ Ωm or more. A concave groove 13c surrounding the other opening 13b is formed at the other edge of the case side body 13, and the concave groove 13c is formed to a depth that allows the ring-shaped packing 32 to be inserted approximately halfway. Four female screw holes 13d are formed in the case side body 13 outside the concave groove 13c so as to sandwich the other opening 13b. On the other hand, a concave groove 16 a corresponding to the concave groove 13 c of the case side body 13 and an attachment hole 16 b corresponding to the female screw hole 13 d are formed in the lid body 16, and the lid body 16 is overlapped on the case side body 13 via the packing 32. In the state, a gap w of 0.01 mm or more and 1 mm or less is formed between the case side body 13 and the lid body 16. The lid body 16 is screwed to the case side body 13 by screwing four male screws 33 inserted into the mounting holes 16b into the eye screw holes 13d in a state where such a gap w is formed. The

  On the other hand, as shown in FIG. 4, the identification means 26 for reading the information stored in the IC chip 23 transmits and receives radio waves from the transmission / reception antenna 27 and the transmission / reception antenna 27, which interact with the antenna coil 22. A processing unit 28 that processes received radio waves and a display unit 29 that displays information stored in the IC chip 23 are provided. The receiving antenna 27 is configured to transmit radio waves to the antenna coil 22 of the identification tag 21 attached to the wristwatch 11 and receive radio waves from the coil 22. The processing unit 28 is connected to the transmission / reception antenna 27, and is connected to the power supply circuit 28a incorporating the battery, the radio frequency (RF) circuit 28b, the modulation circuit 28c, the demodulation circuit 28d, the CPU 28e, and the CPU 28e. And a memory 28f for storing information read from the memory 23. An input unit 28g is connected to the CPU 28e of the processing unit 28, and information input by the input unit 28g is configured to be writable in the IC chip 23.

A method of using a wristwatch with a built-in identification tag will be described.
First, before wearing the wristwatch 11, information specific to the person wearing the wristwatch 11 is input from the input unit 28g of the identification means 26, and information specific to the person wearing the wristwatch 11 is stored in the memory 23f of the IC chip 23. Remember. In this embodiment, it is assumed that information regarding a ski lift ticket is input. A specific writing operation of the identification tag 21 to the memory 23f will be described. First, information on the lift ticket from the transmission / reception antenna 27 of the identification means 26 to the antenna coil 22 of the identification tag 21 (lift ride start time and end time). Time etc.) is transmitted by radio waves of a specific frequency. The unique information in this embodiment is emitted from the identification means 26 as a binarized digital signal. The digital signal is emitted from a signal generator (not shown) and modulated by the modulation circuit 28c. The RF circuit 28b amplifies the modulated signal and transmits it from the transmission / reception antenna 27. Examples of this modulation include ASK (amplitude modulation), FSK (frequency modulation), and PSK (phase modulation).

  The radio wave transmitted from the identification means 26 is received by the antenna coil 22 of the identification tag 21 through the gap w between the case side body 13 and the lid body 16 and the case side body 13 itself or the lid body 16 itself. Is done. When the antenna coil 22 receives radio waves, the capacitor of the power supply circuit 23 a is charged with electric power generated by the mutual induction action of the transmitting / receiving antenna 27 and the antenna coil 22. As a result, the power supply circuit 23a rectifies and stabilizes the power, supplies it to the CPU 23e, and activates the IC chip 23. Next, the RF circuit 23b of the IC chip 23 takes in only the signal necessary for demodulation, the demodulation circuit 23d reproduces the digital signal of unique information, and the CPU 23e stores this digital signal in the memory 23f. After inputting the information, the person who wants to use the wristwatch 11 at the ski resort wears the wristwatch 11 on his / her arm through the belts 12 and 12.

  When a person wearing the wristwatch 11 goes through the gate to get on the lift, another identification means 26 provided on the gate reads the information recorded on the identification tag 21. More specifically, the identification unit 26 transmits a binarized digital signal interrogation signal from the transmission / reception antenna 27 toward the antenna coil 22 of the identification tag 21 by radio waves of a specific frequency. The transmitted radio wave is received by the antenna coil 22 through the gap w between the case side body 13 and the lid body 16 and the case side body 13 itself or the lid body 16 itself. The digital signal emitted from the identification means 26 is modulated by the modulation circuit 28 c, amplified by the RF circuit 28 b, and transmitted from the transmission / reception antenna 27. When the antenna coil 22 receives radio waves, power is charged in the capacitor of the power supply circuit 23a. The power supply circuit 23a supplies power to the CPU 23e, activates the IC chip 23, and causes the demodulating circuit 23d to reproduce the interrogation signal of the original digital signal via the RF circuit 23b. The CPU 23e transmits information on the wristwatch 11 stored in the memory 23f based on the question signal. This information is transmitted by modulating the binarized data signal by the modulation circuit 23c of the IC chip 23, amplifying it by the RF circuit 23b, and transmitting it from the antenna coil 22. The transmitted data is received by the transmission / reception antenna 27 of the identification means 26, and the processing unit 28 displays the unique information of the person wearing the wristwatch from the identification tag 21 on the display unit 29 and the door provided on the gate. Open so that the person who wears the wristwatch 11 can get on the lift.

5 to 7 show a second embodiment of the present invention. In the drawings, the same reference numerals as those of the above-described embodiment denote the same components.
The wristwatch 51 in this embodiment is a so-called digital wristwatch 51, and a display cell 23 m capable of displaying characters, numbers, or symbols is provided below the dial 57, and the movement 20 includes a time in the display cell. And a button battery for driving the time display means. A display window 57a is formed on the dial plate 57 corresponding to the display cell 23m so that the time appearing in the display cell 23m can be visually recognized from the outside. Between the movement 20 and the lid 56, the identification tag 21 is accommodated in a state of being sandwiched between the buffer materials 31, and the IC chip 23 and the display cell 23m are electrically connected. The lid 56 is attached to the case side body 53 in a state where the axis of the antenna coil 22 coincides with the radial direction of the timepiece case 55.

The case side body 53 and the lid body 56 in this embodiment are both made of a titanium alloy that is non-magnetic and has an electric resistance of 40 × 10 ⁻⁸ Ωm or more. A concave groove 53c is formed at the other edge of the case side body 53 so as to surround the other opening 53b, and the concave groove 53c is formed to a depth that allows the ring-shaped packing 32 to be almost half-inserted. The On the other hand, the cover 56 is formed with a groove 56a corresponding to the groove 53c. A male screw 53 d is formed on the peripheral edge of the case side body 53 on the other opening 53 b side, and a female screw 56 b that can be screwed into the male screw 53 d is formed around the lid body 56. The lid 56 positioned in the vicinity of the magnetic pole of the antenna coil 22 of the identification tag 21 is formed as thin as possible. The case side body 53 is screwed. Other than this, the configuration is the same as that of the first embodiment.

  Since the case side body 53 and the lid 56 are both made of a titanium alloy in the wristwatch incorporating the identification tag configured as described above, the radio wave is prevented from being absorbed by the watch case 55, and the identification means 26 is Information unique to the identification tag 21 of the wristwatch 11 can be recorded accurately, and the recorded information can be read reliably. In this embodiment, the identification means 26 at the lift landing is configured to record the history of the person wearing the wristwatch 11 passing through the gate as information unique to the identification tag 21 of the wristwatch 11, and the wristwatch 11 itself. Since the display cell 23m for displaying the information stored in the IC chip 23 of the identification tag 21 is provided on the display tag 57a, the information can be directly recognized by the person wearing the wristwatch from the display unit 57a, and the number of times the lift is boarded in the ski field. Can also be confirmed. Since other operations are substantially the same as those in the first embodiment, repeated description is omitted.

FIG. 8 shows a third embodiment of the present invention. In the figure, the same reference numerals as those of the above-described embodiment denote the same components.
The wristwatch 71 in this embodiment is a so-called digital wristwatch 71, and the identification tag 21 is accommodated between the movement 20 and the lid 76 while being sandwiched between the cushioning materials 31. The lid 76 is attached to the case side body 73 in a state where the axis of the antenna coil 22 coincides with the radial direction of the watch case 75. The case side body 73 and the lid body 76 are made of a titanium alloy, and a concave groove 73c is formed at the other end edge of the case side body 73, and the ring-shaped packing 32 is accommodated in the concave groove 73c. On the other hand, the lid 76 is a relatively thin plate material, and a ring-shaped flange 76a is formed around the lid 76. In the case side body 73, a receiving portion 73d that can be fitted to the flange 76a is formed on the periphery of the other opening. The lid body 76 is attached to the case side body 73 by fitting the flange 76 a of the lid body 76 to the receiving portion 73 d of the case side body 73. Other than this, the configuration is the same as that of the second embodiment described above.

  In the wristwatch incorporating the identification tag configured as described above, the case side body 73 and the lid body 76 are made of titanium alloy, and the lid body 76 is formed to be relatively thin, so that radio waves are generated in the vicinity of the magnetic pole of the antenna coil 22. Absorption by the watch case 75 is avoided, and the identification means 26 can accurately record information unique to the identification tag 21 of the wristwatch 71 and can reliably read the recorded information. Since other operations are substantially the same as those in the second embodiment, repeated description is omitted.

In the above-described embodiment, the identification tag 21 is accommodated between the movement 20 and the lid in a state of being sandwiched by the cushioning material 31. However, the cushioning material 31 is not particularly required, and the cushioning material 31 can be eliminated. For example, the wristwatch itself can be made thin.
In the above-described embodiment, the case where the watch case including the case side body and the lid is all metal has been described. However, the watch case may be a resin. Even if the watch case is made of resin, it has a movement made of metal and a battery that is both conductive and ferromagnetic. However, in the identification tag of the present invention in which the antenna coil 22 includes the core member 22a and the coil portion 22b, the change in the impedance of the resonance circuit is minimized and the change in the resonance frequency is suppressed. Even in the built-in state, it can operate normally.

Moreover, when forming a cover body thinly in order to transmit an electromagnetic wave reliably, it is preferable to form a reinforcement rib in the cover body, if necessary. As shown in FIGS. 9 and 10, when the reinforcing rib is formed, the reinforcing rib may be formed on the radial rib 87a or the concentric rib 87b or both in order to prevent warping of the lid 87 or the like. preferable. In the case where radial and concentric ribs cannot be formed because the wristwatch itself is also thin, as shown in FIG. 11 and FIG. 12, the coil portion 22b is connected to one of the magnetic core members 22a as long as the identification tag 21 can operate normally. The reinforcing rib 96a may be formed so as to avoid the coil portion 22b. Even in this case, radio waves can be effectively passed through the locally thinned portion of the lid 96.
Further, when the wristwatch itself is relatively small, the magnetic core member 22a is formed in a polygonal shape corresponding to the inner diameter of the watch case of the wristwatch as shown in FIG. 13, or it corresponds to the inner diameter as shown in FIG. Then, roundness may be formed at both end edges of the magnetic core member 22a. If a plate material having such a polygonal shape or rounded ends is used as the magnetic core member 22a, the antenna coil 22 can be enlarged corresponding to the size of the watch case, and the necessary cross-sectional area can be increased. The magnetic core member 22a can be obtained.

Next, embodiments of the present invention will be described in detail.
<Examples 1-9>
Plate materials having the materials and thicknesses shown in Table 1 were prepared, and these plate materials were processed so that the width and length were 20 mm and 30 mm, respectively, to obtain a magnetic core member 22a. However, in Example 6, the tip shape was trapezoidal as shown in FIG. 13, and in Example 7, the tip shape was processed into an arc shape as shown in FIG. 14 to obtain a magnetic core member 22a. . Further, a coated copper wire having a wire diameter of 0.1 mm was prepared as a conducting wire constituting the coil portion 22b. Winding the coated copper wire around the magnetic core member 22a so that the longitudinal direction of the magnetic core member 22a becomes the magnetization axis, and winding it about 200 times so that L becomes 7.8 mH in a state where it is put in a watch case described later. The coil part 22b was formed by turning and the antenna coil 22 was produced. The identification tag 21 that operates at 125 kHz was manufactured by electrically connecting the IC chip 23 to the coil portion 22b of the antenna coil 22.

  Next, the watch case made of the material shown in Table 1 was processed, and the case side body and the lid body were made so that the inner diameter was 35 mm and the depth was 12 mm in a superposed state. Table 1 shows the thickness of each of the case side body and the lid. Each identification tag 21 shown in Table 1 is accommodated together with the movement in each case side body, the axis of the antenna coil 22 is directed in the radial direction of the lid, and the axis is a gap between the lid and the case side. A test wristwatch was made by stacking the lid on the side of the case with a 1 mm gap so as to face the surface. The movement was 35 mm in diameter and 8 mm in height, and the test information was stored in the IC chip 23.

<Comparative Examples 1-3>
The same identification tag 21 as in Example 1 was created. Next, a metal shown in Table 1 having an electric resistance of less than 40 × 10 ⁻⁸ Ωm was prepared, and a case side body and a lid body having the same shape and the same size as in Example 1 were made using this metal. In this case side body, the identification tag 21 shown in Table 1 is accommodated together with the same movement as in Examples 1 to 9, the axis of the antenna coil 22 is directed in the radial direction of the wristwatch 11, and the axis is the lid body and the case side body. A lid was placed on the side of the case with a 1 mm gap so as to face the gap between them, and a simulated wristwatch for testing was made.
In addition, the electrical resistance of the metal which comprises each timepiece case of Examples 1-9 and Comparative Examples 1-3 was as shown in Table 1. Table 1 shows the characteristics of each antenna coil 22 in Examples 1 to 9 and Comparative Examples 1 to 3 and the characteristics of each antenna coil 22 housed in a watch case composed of a lid and a case side body. Show.

<Comparison test and evaluation>
Each of the simulated wristwatches of Examples 1 to 9 and Comparative Examples 1 to 3 is slowly brought close to the transmission / reception antenna of the identification unit 26 that transmits a 125 kHz radio wave, and the identification unit displays unique information stored in the IC chip. The distance between the wristwatch and the transmitting / receiving antenna when displayed on the screen was measured. The results are shown in Table 1.

As is clear from Table 1, in Examples 1 to 9, the identification unit 26 displayed the unique information stored in the IC chip on the display unit. This is considered to be caused by the fact that the watch case is made of a metal that is nonmagnetic and has an electric resistance of 40 × 10 ⁻⁸ Ωm or more. This is clear from the fact that the higher the electrical resistance, the longer the working distance. On the contrary, in Comparative Examples 1 to 3, the identification unit 26 did not display the unique information stored in the IC chip on the display unit. This is considered to be due to the fact that the electrical resistance of the watch case is made of less than 40 × 10 ⁻⁸ Ωm or a ferromagnetic metal.

FIG. 4 is a cross-sectional view taken along line AA of FIG. 3 showing the wristwatch incorporating the identification tag according to the first embodiment of the present invention. It is a front view which shows the state by which the identification tag is arrange | positioned at the cover body. It is a front view of the wristwatch. It is the block diagram of the identification tag and identification means. It is sectional drawing corresponding to FIG. 1 which shows 2nd Embodiment of this invention. It is a front view which shows the state by which the identification tag is arrange | positioned at the cover body. It is a front view of the wristwatch. It is a longitudinal cross-sectional view corresponding to FIG. 1 which shows 3rd Embodiment of this invention. It is a front view of a lid provided with a reinforcing rib. FIG. 10 is a sectional view taken along line B-B in FIG. 9. It is a front view of the cover body which shows the relationship between the antenna coil and reinforcement rib in which the coil part was formed in a part of magnetic core member. It is CC sectional view taken on the line of FIG. It is a front view of the lid with which the magnetic core member which consists of polygons is arranged. It is a front view of a lid with a magnetic core member having an end formed in an arc shape.

Explanation of symbols

11 Wristwatch 13, 53, 73 Case side body 13a, 53a, 73a One opening 13b, 53b, 73b The other opening 14 Glass 15, 55, 75 Watch case 16, 56, 76 Cover 21 Identification tag 22 Antenna Coil 22a Magnetic core member 22b Coil portion 23 IC chip 23m Display portion 32 Packing 53d Male screw 56b Female screw 76a Flange 73d Receiving portion

Claims (15)

Built in the watch case (15, 55, 75), and provided with an antenna coil (22) and an IC chip (23) electrically connected to the coil (22) and capable of storing information unique to the wearer of the watch In the watch identification tag,
A wristwatch identification tag, wherein the antenna coil (22) includes a magnetic core member (22a) and a coil portion (22b) wound around the magnetic core member (22a).   The wristwatch identification tag according to claim 1, wherein the magnetic core member (22a) is a ferrite plate.   The wristwatch identification tag according to claim 1, wherein the magnetic core member (22a) is made of a composite material of ferrite powder and plastic or rubber.   The wristwatch identification tag according to claim 1, wherein the magnetic core member (22a) is formed by laminating thin films or thin plates of soft magnetic metal.   The wristwatch identification tag according to claim 1, wherein the magnetic core member (22a) is made of a composite of soft magnetic metal powder or flakes and plastic or rubber.   The wristwatch identification tag according to claim 1, wherein the magnetic core member (22a) is made of a composite material of ferrite powder and soft magnetic metal powder or flakes and plastic or rubber.   The wristwatch identification according to any one of claims 4 to 6, wherein the soft magnetic metal is formed of any one of amorphous alloy, permalloy, electromagnetic soft iron, silicon steel plate, sendust alloy, Fe-Al alloy, carbonyl iron or reduced iron. Tags for.   The magnetic core member (22a) is a polygonal plate material corresponding to the inner diameter of the watch case (15, 55, 75) of the watch, or a rectangular shape with rounded edges on both ends corresponding to the inner diameter. The wristwatch identification tag according to any one of claims 1 to 7, which is a plate material. Case side body (13, 53, 73) in which glass (14) is attached to one opening (13a, 53a, 73a) and the other opening (13b, 73) of case side body (13, 53, 73) 53b, 73b) is a watch in which the identification tag (21) according to any one of claims 1 to 8 is incorporated in a watch case (15, 55, 75) comprising a lid (16, 56, 76) that closes ,
Either or both of the case side body (13, 53, 73) and the lid body (16, 56, 76) are non-magnetic and made of a metal having an electric resistance of 40 × 10 ⁻⁸ Ωm or more. A watch characterized by that.   The wristwatch according to claim 9, wherein the lid (16) is screwed to the case side body (13) with a gap (w) of 0.01 mm or more and 1 mm or less through the ring-shaped packing (32).   A male screw (53d) is formed at the periphery of the other opening (53b) of the case side body (53), and a female screw (56b) that can be screwed into the male screw (53d) is formed around the lid (56). The wristwatch according to claim 9, wherein the male screw (53d) is screwed into the female screw (56b), and the lid (56) is screwed to the case side body (53).   A ring-shaped flange (76a) is formed on the lid (76), and a receiving portion (73d) to which the flange (76a) can be fitted is formed on the other opening peripheral edge of the case side body (73), The wristwatch according to claim 9, wherein the lid (76) is attached to the case side body (73) by fitting a flange (76a) to the receiving portion (73d).   The case side body (13, 53, 73) or the lid (16, 56, 76) in the vicinity of the magnetic pole of the antenna coil (22) of the identification tag (21) of the wristwatch is formed thin. The wristwatch according to claim 1.   The wristwatch according to any one of claims 9 to 13, wherein the axis of the antenna coil (22) of the identification tag (21) of the wristwatch coincides with the radial direction of the watch case (15, 55, 75). .   The wristwatch according to any one of claims 9 to 14, further comprising a display section (23m) for displaying information stored in the IC chip (23) of the identification tag (21) for the wristwatch.

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