WO2004070479A1 - 電波時計 - Google Patents
電波時計 Download PDFInfo
- Publication number
- WO2004070479A1 WO2004070479A1 PCT/JP2003/016970 JP0316970W WO2004070479A1 WO 2004070479 A1 WO2004070479 A1 WO 2004070479A1 JP 0316970 W JP0316970 W JP 0316970W WO 2004070479 A1 WO2004070479 A1 WO 2004070479A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- watch case
- radio
- antenna
- back cover
- magnetic
- Prior art date
Links
Classifications
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- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G17/00—Structural details; Housings
- G04G17/08—Housings
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- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R60/00—Constructional details
- G04R60/02—Antennas also serving as components of clocks or watches, e.g. motor coils
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- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B37/00—Cases
- G04B37/22—Materials or processes of manufacturing pocket watch or wrist watch cases
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G21/00—Input or output devices integrated in time-pieces
- G04G21/04—Input or output devices integrated in time-pieces using radio waves
-
- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R60/00—Constructional details
- G04R60/06—Antennas attached to or integrated in clock or watch bodies
- G04R60/10—Antennas attached to or integrated in clock or watch bodies inside cases
- G04R60/12—Antennas attached to or integrated in clock or watch bodies inside cases inside metal cases
Definitions
- the present invention relates to a radio-controlled timepiece that receives a predetermined bright radio wave including time information and displays the time, and in particular, improves the radio-wave reception performance when using a normal metal timepiece case. Also, the present invention relates to a case structure of a radio-controlled timepiece aimed at improving the magnetic resistance against external magnetism.
- An electronic clock that receives a standard radio wave that is, a radio clock that can obtain an accurate time by receiving a standard radio wave (carrier) including time information and extracting time information from the radio wave is already known. I have.
- the radio waves containing this time information differ in frequency from country to country.For example, in Japan, 40 kHz and 60 kHz standard radio waves are transmitted under the jurisdiction of the Ministry of Internal Affairs and Communications and the Japan Post Office. .
- FIG. 26 is a block diagram schematically showing the function of such a radio controlled watch.
- This radio clock includes an antenna 1, a radio clock receiver 2, a CPU 3, a display driver 4, an input device 5, and the like.
- the hour, minute, and second hands or a display unit such as a liquid crystal are included.
- an antenna 1 receives a radio wave including time information.
- Radio clock receiver 2 amplifies and detects the radio wave received by antenna 1 and The time information is extracted and output.
- the CPU 3 outputs current time data based on the time information output from the radio clock receiver 2.
- the display drive unit 4 displays the current time on the display unit based on the current time data output from the CPU 3.
- the input device 5 is used, for example, when inputting operation information such as reset to the CPU 3.
- the time information (time code) contained in the radio wave is a pulse signal with a period of 60 seconds, which differs depending on the country.In Japan, however, every 200 seconds, 500, 800 msec There is one pulse with either width. By combining these pulses, time information can be obtained in 60 seconds.
- the CPU 3 acquires time information (current time) by reading the pulse width of the pulse every one second from the received pulse signal. Then, the CPU corrects the display time on the display unit via the display drive unit 4 based on the acquired time information.
- the radio-controlled timepiece can always display an accurate time by correcting the display time at predetermined intervals based on the received time information.
- a radio clock As such a radio clock, a wristwatch in which an antenna, a radio clock receiver, a CPU, a display drive unit and a display unit are housed in a case serving as an antenna housing has already been provided.
- non-conductive materials such as synthetic resin and ceramic have been mainly used for the antenna to receive radio waves.
- the antenna is housed inside a case made of a conductive material such as metal, the magnetic flux generated near the antenna is absorbed by the conductive material and the resonance phenomenon is hindered. This is because the receiving function is significantly reduced.
- FIG. 27 is a cross-sectional view showing an example of the structure of a radio-controlled wristwatch using a metal for a part of the case.
- the case 10 of the wristwatch is roughly composed of a watch case body 11, a back cover 12 and a windshield 13.
- a movement 14 is arranged by a known means inside the body to which a band (not shown) is connected. Above the movement 14, a dial 15 and a hand 16, which are time display units, are also arranged by known means.
- a bar antenna 17 that is a magnetic long-wave antenna is arranged below the movement 14 and above the back cover 12.
- the antenna 17 includes a magnetic core member 18 made of a ferrite material and a coil 20 wound around the magnetic core member 18 and is fixed to the upper surface of a synthetic resin holding member.
- the movement 14 includes the radio-controlled timepiece receiver 2, the CPU 3, and the display drive unit 4, and is electrically connected to the par antenna 17 via the conductor 21.
- the CPU of the movement 14 operates the gear mechanism (not shown) of the display drive unit so as to always correct the position of the needle 16 of the display unit. Drive.
- the up-down direction indicates the up-down direction in FIG.
- the watch case body 11 is made of a conductive material and not hollow, that is, made of a solid metal, for example, solid stainless steel.
- a windshield 13 made of glass, which is a non-conductive material, is fixed to the top of the watch case body 11 by a known means such as bonding.
- the dial 15 is made of a non-conductive material such as synthetic resin or ceramic.
- the lid 12 includes an annular frame 22 made of stainless steel fixed to the watch case body 11 and glass 23 fixed in the frame. In this way, this watch has the advantage that the non-conductive material is visible on the upper and lower surfaces of the case, but since the sides of the case are made of metal, it does not detract from the high-class appearance and aesthetics of the accessory. (Refer to Japanese Patent Application Laid-Open No. 2000-33571).
- the wristwatch shown in Fig. 27 has no major problem with the radio wave reception performance for portable use, but since the glass 23 is fixed to the frame 22 of the back cover 12 There is a problem that the glass 23 may be damaged if an impact such as dropping is given.
- the glass 23 may come off the frame 22 due to sweat or the movement inside the wristwatch (antenna 1, radio clock receiver 2, CPU 3, display drive 4, etc.) may get sweat, water, dust, etc., and significantly reduce the function as a wristwatch.
- the glass 23 is provided on the back cover 12, the number of parts increases and the number of assembling steps also increases, leading to a problem of increasing costs. Also, since non-metallic members were used for the exterior, they lacked the profound feeling of a wristwatch, and had problems with luxury and appearance quality.
- the wristwatch shown in FIG. 27 employs metal for the case body, so that the disadvantage of disposing the antenna near the metal member is inevitable. Therefore, the reception performance of the bar antenna of this wristwatch is reduced by nearly 40% compared to the case where all of the case is made of a non-conductive material. Therefore, the distance from the transmitting station of the standard radio wave is far! /, It is difficult to receive standard radio waves, such as in places! / In an environment, this radio-controlled wristwatch often cannot receive standard radio waves.
- the magnetism from the outside may affect the hands and the accuracy of the timepiece may decrease.
- FIG. 28 is a cross-sectional view showing the structure of a wristwatch in which a magnetic-resistant plate for preventing the influence of external magnetism as described above is provided between a middle frame holding a movement and a back cover. '' In this structure, an inner frame 6 for fixing the movement 4 is provided inside the case 2, and an upward U-shaped anti-magnetic plate 10 is attached to the back lid 8 side of the inner frame 6 to surround the movement 4. (See Utility Model Registration No. 25059567).
- the anti-magnetic plate 10 may be fixed to the module with screws or bite-off as described above, may be fixed between the core 8 a of the back cover 8 and the inner frame 6, or may be fixed inside the back cover 8. It was fixed to the surface with an adhesive, and was fixed with a fixing structure according to the space inside the watch case and the structure of the module.
- radio timepieces receive a standard radio wave (carrier) containing time information and extract the time information from this radio wave to obtain the correct time and display it. Surrounding the movement with a magnetic-resistant plate could reduce the reception performance. For this reason, it has not been possible to use anti-magnetic plates in radio timepieces.
- the present invention has been made in view of the above-described problems of the related art. Even if a normal metal watch case is used, a radio wave including predetermined information such as time information is received on a mobile phone without any trouble. It is possible to improve the appearance quality with a stable waterproof quality and luxury and to expand the design parity like general watches. An object is to provide a possible radio controlled watch case.
- the present invention can receive a radio wave including predetermined information such as time information even when using a watch case in which a magnetic-resistant plate is disposed inside the case, and can perform a predetermined operation even in an environment having external magnetism. It is an object of the present invention to provide a radio controlled clock capable of maintaining the time accuracy of the radio wave.
- a radio timepiece of the present invention receives a radio wave including time information, and the antenna receives the radio wave.
- a clock device that displays time information such as the current time on the display unit using the received radio waves,
- a watch case that stores the antenna and a watch device
- At least one non-magnetic member fixed to the inner surface of the watch case and having an electric resistivity of 7. ⁇ ⁇ —Cm or less;
- the watch case is made of at least one material selected from titanium, a titanium alloy, stainless steel, tungsten carbide, and tantalum single-bite car,
- the non-magnetic member is fixed to an inner surface of the watch case.
- the watch case includes a watch case body, and the watch case body includes titanium, a titanium alloy, stainless steel, and a tinda. Consists of at least one material selected from one byte of stainless steel and tantalum carbide,
- the non-magnetic member is fixed to an inner surface of the watch case body.
- the radio timepiece of the present invention wherein the watch case comprises: a watch case body; and a back cover fixedly attached to the watch case body.
- the back cover is made of at least one material selected from titanium, a titanium alloy, stainless steel, tungsten carbide, and tantalum carbide, and the non-magnetic member is fixed to an inner surface of the back cover. It is characterized by the following.
- the vicinity of the antenna caused by the metal material can be obtained. Since the disturbance of the resonance phenomenon can be reduced, sufficient reception sensitivity can be obtained even with a metal watch case.
- a nonmagnetic member set to 7.0 ⁇ -Cm or less is used as the nonmagnetic member fixed to the watch case, for example, the body of the watch case or the inner surface of the back cover,
- a metal with low reception sensitivity, low frequency selectivity, and high electrical resistivity such as titanium, titanium alloy, stainless steel, tantalum byte, etc. It can be used as a watch case fuselage or back cover without sacrificing the reception sensitivity, and the mechanical and external functions of the watch case can be improved.
- the radio timepiece of the present invention is characterized in that the nonmagnetic member is made of at least one material selected from gold, silver, copper, brass, aluminum, magnesium, zinc, or an alloy thereof. And Further, in the radio timepiece of the present invention, the nonmagnetic member is formed by joining at least two or more materials selected from gold, silver, copper, brass, aluminum, magnesium, or an alloy thereof. It is characterized by having.
- Such gold, silver, copper, brass, aluminum, magnesium, or an alloy thereof is a metal having an electric resistivity of 7 ⁇ -Cm or less. Or, by using it as a non-magnetic member fixed to the inner surface of the back cover, the reception sensitivity and frequency selectivity are improved, and the disturbance of the resonance phenomenon near the antenna due to the metal material can be reduced. Even with a metal watch case, sufficient reception sensitivity can be obtained.
- the radio timepiece of the present invention is characterized in that a resin member is closely attached to an inner surface of the non-magnetic member.
- the antenna is constituted by a magnetic core member and a plurality of coils wound around the magnetic core member,
- the non-magnetic member is arranged at a position where the antenna is projected on an inner surface of the watch case in parallel along at least one plane including an axis of the magnetic core member.
- the antenna is constituted by a magnetic core member and a plurality of coils wound around the magnetic core member,
- the non-magnetic member is disposed at a position of a watch case body where the antenna is projected parallel to an inner surface of the watch case along at least one plane including an axis of the magnetic core member. I do.
- the antenna includes a magnetic core member and a magnetic core member. Composed of several wound coils,
- the non-magnetic member is disposed at a position of a back cover where the antenna is projected parallel to an inner surface of the watch case along at least one plane including an axis of the magnetic core member. .
- the antenna includes a magnetic core member and a coil wound around the magnetic core member a plurality of times.
- the non-magnetic member is arranged at a position on the inner surface of the watch case facing at least one axial end of the antenna.
- the non-magnetic member By arranging the non-magnetic member at such a position, the non-magnetic member is located near the antenna, thereby reducing the disturbance of the resonance phenomenon near the antenna due to the metal material. As a result, sufficient reception sensitivity can be obtained even with a metal watch case.
- the watch case is made of a clad material in which the non-magnetic member is pressure-bonded to at least one material selected from titanium, a titanium alloy, and stainless steel. It is characterized.
- the watch case includes a watch case body, and the watch case body press-welds the non-magnetic member to at least one or more materials selected from titanium, a titanium alloy, and stainless steel. It is characterized by being composed of a clad material.
- the radio timepiece of the present invention wherein the watch case comprises: a watch case body; and a back cover fixedly attached to the watch case body.
- the back cover is made of a clad material in which the nonmagnetic member is pressure-welded to at least one or more materials selected from titanium, a titanium alloy, and stainless steel.
- the radio timepiece of the present invention is characterized in that the non-magnetic member is fixed to the timepiece case by at least one of press-fitting, force crimping, welding, brazing, and adhesive.
- the watch case includes a watch case body, and the non-magnetic member is formed by at least one of press-fitting, force crimping, welding, brazing, and an adhesive. It is characterized by being fixed to the body.
- the radio timepiece of the present invention wherein the watch case comprises: a watch case body; and a back cover fixedly attached to the watch case body.
- the non-magnetic member is at least one of a press fit, a force crimp, a welding, a brazing, and an adhesive.
- the non-magnetic member can be easily fixed to the inner surface of the watch case, for example, to the inner surface of the watch case body and the back cover.
- the radio timepiece of the present invention is characterized in that the non-magnetic member fixed to the timepiece case is formed by means of a wet plating method or a metal spraying method.
- the watch case includes a watch case body, and the non-magnetic member fixed to the watch case body is formed by a wet plating method or a metal spraying method. It is characterized.
- the radio timepiece of the present invention wherein the watch case comprises: a watch case body; and a back cover fixedly attached to the watch case body.
- the non-magnetic member fixed to the back cover is formed by a wet plating method or a metal spraying method.
- the non-magnetic member can be easily fixed to the inner surface of the watch case, for example, to the inner surface of the watch case body or the back cover by a wet plating method or a metal spraying method.
- the manufacturing process is simplified and costs can be reduced.
- the radio timepiece of the present invention is characterized in that the nonmagnetic member has a thickness in a range from 50 m to 2000 ⁇ m.
- the thickness of the non-magnetic member is in such a range, the gain of the antenna is high, the receiving sensitivity is good, the frequency selectivity is good, and the movement between the watch case body and the back cover and the movement antenna is good.
- the thickness is optimal considering the distance between the two or the ease of handling of the non-magnetic material during manufacturing and assembly.
- the radio timepiece of the present invention includes: an antenna for receiving a radio wave including time information; a clock device for displaying time information such as a current time on a display unit by the radio wave received by the antenna;
- a radio controlled watch comprising a watch case for storing the antenna and a watch device,
- the watch case is at least partially composed of a nonmagnetic member having an electric resistivity of 7.0 ⁇ -Cm or less.
- the surface of the watch case is surface-finished.
- the watch case includes a watch case body, a back cover,
- At least one of these watch case body, case back and bezel is made of non-magnetic material
- the watch case other than the watch case made of the non-magnetic raw material is made of at least one material selected from titanium, titanium alloy, stainless steel, tungsten carbide, tantalum carbide, and resin. It is characterized by being done.
- a part of the watch case for example, a part of the watch case body, case back, bezel, or at least one of them has an electrical resistivity of 7.0 ⁇ —C m or less. Since it is made of a set non-magnetic member, the non-magnetic member can reduce the disturbance of the resonance phenomenon near the antenna caused by the metal material. Sensitivity can be obtained.
- a part of the watch case for example, a part of the watch case body, case back, bezel, or at least one of them can be reduced to 7.0 ⁇ -Cm or less
- a non-magnetic material that has been set it is a metal with low reception sensitivity, low frequency selectivity, and high electrical resistivity, such as titanium, titanium alloy, stainless steel, and tantalum carbide.
- Excellent metal can be used as a watch case part other than the watch case part made of non-magnetic material without sacrificing the reception sensitivity. Can be improved.
- the surface of the watch case made of 14 non-magnetic materials is surface-finished, it has corrosion resistance, heat resistance, mechanical strength, etc., and a high-grade metallic color, etc.
- a watch case with a high appearance quality such as a watch case fuselage, case back, and bezel, can be designed and manufactured in the same way as a general watch that is not a radio controlled watch. It can be enlarged to the ordinary clock.
- the radio timepiece of the present invention is characterized in that the nonmagnetic member is made of at least one material selected from gold, silver, copper, brass, aluminum, magnesium, zinc, or an alloy thereof.
- the nonmagnetic member is formed by joining at least two or more materials selected from gold, silver, copper, brass, aluminum, magnesium, or an alloy thereof. It is characterized by that.
- Such gold, silver, copper, brass, aluminum, magnesium, or alloys thereof are metals having an electrical resistivity of 7 ⁇ -Cm or less.
- the reception sensitivity and frequency selectivity are improved, and the resonance phenomenon near the antenna caused by metal material Since the disturbance of the clock can be reduced, it is possible to obtain sufficient reception sensitivity even with a metal watch case.
- the antenna is constituted by a magnetic core member and a plurality of coils wound around the magnetic core member,
- the antenna is constituted by a magnetic core member and a plurality of coils wound around the magnetic core member,
- a member of the watch case facing at least one axial end of the antenna, or a portion facing a member of the watch case facing the axial end is made of the non-magnetic member. I do.
- the antenna Since the non-magnetic member is located near the antenna, it is possible to reduce the disturbance of the resonance phenomenon near the antenna caused by the metal material, so that sufficient reception sensitivity can be obtained even with a metal watch case It becomes.
- the radio timepiece of the present invention is characterized in that the surface finish comprises at least one surface finish selected from a mirror surface, a satin finish, a hairline basis, a pattern, and characters.
- the surface finish is high-quality, high-quality watch cases, such as the watch case body, case back, and bezel.
- watch cases such as the watch case body, case back, and bezel.
- the surface finish is made of a metal film
- the metal film is provided by at least one means selected from a wet plating method, an evaporation method, an ion plating method, an arc method, and a sputtering method. It is characterized by
- the surface finish is made of a metal film, it has corrosion resistance, heat resistance, mechanical strength, etc., as well as a high-quality metallic color and other color tone and a high appearance quality.
- the back cover, bezel, etc. can be designed and manufactured in the same way as ordinary watches that are not radio-controlled watches, and the design of the case for radio-controlled watches can be expanded to the level of ordinary watches.
- the radio timepiece of the present invention is characterized in that the surface finish is applied to a surface of the non-magnetic member.
- the surface finish is applied to the surface of the non-magnetic member, so that the watch has high corrosion resistance, heat resistance, mechanical strength, etc., and also has a high-quality metallic color and other color tone and appearance quality.
- Cases such as the watch case body, case back, and bezel, can be designed and manufactured in the same way as ordinary watches that are not radio controlled watches, expanding the case design of radio controlled watches to that of ordinary watches. be able to.
- the radio timepiece of the present invention includes: an antenna for receiving a radio wave including time information; a clock device for displaying time information such as a current time on a display unit by the radio wave received by the antenna;
- a radio controlled watch comprising a watch case for storing the antenna and a watch device,
- the watch case is made of metal.
- the radio timepiece of the present invention is characterized in that the antenna is disposed so as to be in contact with the inner surface of the timepiece case.
- the radio timepiece of the present invention is characterized in that the antenna is disposed apart from the inner surface of the timepiece case.
- the watch case is made of metal, and the distance between the antenna and the watch case, i.e., the thickness of the watch case body T1, the thickness of the watch case back cover T2, and the watch case
- the distance between the antenna and the watch case i.e., the thickness of the watch case body T1, the thickness of the watch case back cover T2, and the watch case
- the gap D 1 from the inner surface of the body to the antenna and the gap D 2 from the inner surface of the back cover to the antenna based on the receiving sensitivity
- the reception sensitivity can be improved even with a metal watch case.
- metals with low reception sensitivity, low frequency selectivity and high electrical resistivity such as titanium, titanium alloy, stainless steel, tantalum, etc.
- it can be used as a watch case body, case back, bezel, etc., without sacrificing reception sensitivity, and can improve the mechanical and external functions of the watch case. .
- the watch case and the antenna are set such that the watch case body of the watch case has a thickness T1 of 300 ⁇ to 500 ⁇ m. It is characterized by the following.
- the watch case and the antenna are set such that a body thickness T1 of the watch case body of the watch case is from 50 O / im to 2000 / m. It is characteristic that it is.
- the body thickness T 1 of the watch case body of the watch case is increased from 300 m to 50
- the antenna gain is high, the reception sensitivity is good, and the strength that can be used as a watch case can be maintained.
- the body thickness T1 of the body of the watch case is from 5 to 100 ⁇ to 200 ⁇ , the antenna gain is high and the reception sensitivity is good.
- the watch case and the antenna are set such that a gap D1 from an inner surface of the watch case body to the antenna of the watch case is 0 to 400 000 ⁇ . It is characterized by having. Further, in the radio-controlled timepiece of the present invention, the watch case and the antenna are set such that a gap D 1 from the inner surface of the watch case body to the antenna is from 500 ⁇ to 10000 ⁇ . It is characterized by.
- the antenna gain is high and the reception sensitivity is good.
- ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ from 500; m, the antenna gain is high, the reception sensitivity is good, and the strength that can be used as a watch case can be maintained.
- the most suitable watch case body considering the appearance, workability, corrosion resistance, etc., can be obtained.
- the radio timepiece of the present invention is characterized in that the watch case and the antenna are set such that the back cover thickness T2 of the back cover of the watch case is from 100 ⁇ to 5000 ⁇ .
- the radio timepiece of the present invention is characterized in that the watch case and the antenna are set such that the back cover thickness T2 of the back cover of the watch case is from 300 ⁇ to 2000 ⁇ .
- the antenna gain is high, the reception sensitivity is good, and it can be used as a watch case. High strength and the like can be maintained.
- the back cover thickness T2 of the back cover of the watch case is 300 inches to 2000, the antenna gain is high, the receiving sensitivity is good, and the strength that can be used as a watch case Etc. can be maintained, It is possible to obtain the most suitable case back for the watch case, taking into account its appearance, workability and corrosion resistance.
- the watch case and the antenna are set such that a gap D2 from the inner surface of the back cover of the watch case to the antenna is set to be 0 to 500 ⁇ .
- the watch case and the antenna are set such that a gap D 2 from the inner surface of the back cover of the watch case to the antenna is from 100 ⁇ m to 700 ⁇ . It is characterized by being.
- the gain of the antenna is improved.
- the reception sensitivity is good, and the strength that can be used as a watch case can be maintained.
- the gap D2 from the inner surface of the back cover of the watch case to the antenna from 100 ⁇ to 70 ⁇ , the antenna gain is high and the reception sensitivity is good. Yes, it is possible to maintain the usable strength of the watch case, and to obtain the most suitable back of the watch case considering the appearance, workability, corrosion resistance, etc. as the watch case.
- the radio timepiece of the present invention is characterized in that the timepiece body of the timepiece case is made of at least one material selected from titanium, a titanium alloy, stainless steel, tungsten carbide, and tantalum carbide.
- the radio timepiece of the present invention is characterized in that a back cover of the watch case is made of at least one material selected from titanium, a titanium alloy, stainless steel, tungsten carbide, and tantalum carbide. .
- the distance between the antenna and the watch case Receive the thickness T 1 of the watch case body, the thickness of the back cover of the watch case back ⁇ 2, the gap D 1 from the inside of the watch case body to the antenna, and the gap D 2 from the inside of the back cover to the antenna.
- the radio timepiece of the present invention is characterized in that the watch case body of the watch case is made of at least one material selected from gold, silver, copper, brass, aluminum, magnesium, zinc, or an alloy thereof.
- the watch case body of the watch case is formed by joining at least two or more materials selected from gold, silver, copper, brass, aluminum, magnesium, zinc, or an alloy thereof. It is characterized by having been done. Further, the radio timepiece of the present invention is characterized in that the back cover of the watch case is made of at least one material selected from gold, silver, copper, brass, aluminum, magnesium, zinc, or an alloy thereof. And
- the back cover of the watch case is formed by joining at least two or more materials selected from gold, silver, copper, brass, aluminum, magnesium, or an alloy thereof. It is characterized by the following.
- Such gold, silver, copper, brass, aluminum, magnesium, or an alloy thereof is a metal having an electrical resistivity of 7 ⁇ -Cm or less, and such a metal is used as a watch case, for example, a watch case. Used for torso, back cover, bezel, etc. Therefore, both the reception sensitivity and frequency selectivity are improved, and the disturbance of the resonance phenomenon near the antenna caused by metal material can be reduced, so that sufficient reception sensitivity can be obtained even with a metal watch case It becomes.
- the radio timepiece of the present invention is characterized in that the timepiece body of the timepiece case is made of a hard metal.
- the radio timepiece of the present invention is characterized in that the back cover of the timepiece case is made of a hard metal.
- the watch case for example, the watch case body, case back, and bezel are made of a hard metal, so that the reception sensitivity can be improved even in a metal watch case, In addition, wear and damage can be prevented, and mechanical strength can be improved.
- the radio controlled timepiece of the present invention is characterized in that at least one of a watch case body or a back cover of the watch case is subjected to a surface treatment and / or a hardening treatment.
- the watch case body or case back of the watch case is finished with surface treatment Z or hard treatment, so it has corrosion resistance, heat resistance, mechanical strength, etc.
- a watch case with a rich metallic color and a high appearance quality such as a watch case body, case back, and bezel, can be designed and manufactured in the same way as a general watch that is not a radio watch.
- the design variations of the watch case can be expanded to the level of ordinary watches.
- the radio timepiece of the present invention is characterized in that an inner surface of a watch case body of the watch case and an outer surface of the antenna are disposed so as to be substantially parallel in a plan view.
- radio-controlled timepiece may be configured such that: ) The end surfaces of both ends in the axial direction are arranged substantially in parallel.
- the radio-controlled timepiece according to the present invention is characterized in that the outer surface of the antenna is arranged to be substantially perpendicular to the inner surface of the back cover of the timepiece case.
- the receiver sensitivity is the thickness of the case body T1, the thickness of the case back T2 of the watch case, the gap D1 from the inside of the case body to the antenna, and the gap D2 from the inside of the case back to the antenna.
- the radio timepiece of the present invention is characterized in that an inner surface of a back cover of the watch case and an outer surface of the antenna are arranged to be substantially parallel.
- the radio-controlled timepiece according to the present invention is characterized in that one end faces of both ends in the axial direction of the antenna are arranged substantially perpendicular to the inner surface of the back cover of the timepiece case.
- the radio timepiece of the present invention is characterized in that an inner surface of a watch case body of the watch case and an outer surface of the antenna are arranged so as to be substantially parallel in plan view.
- the distance between the antenna and the watch case that is, the body of the watch case body,
- the thickness of the body ⁇ 1, the thickness of the case back of the watch case ⁇ 2, the gap D 1 from the inside of the body of the watch case to the antenna, and the gap D 2 from the inside of the case back to the antenna are based on the receiving sensitivity.
- the back cover of the watch case has a planar two-dimensional shape. It is characterized by consisting of
- the radio timepiece of the present invention is characterized in that at least one nonmagnetic member having an electric resistivity of 7.0 IX ⁇ -Cm or less is fixed to an inner surface of the watch case.
- a nonmagnetic member set to 7.0 ⁇ -Cm or less is used as the nonmagnetic member fixed to the watch case, for example, the body of the watch case or the inner surface of the back cover.
- a metal with low reception sensitivity, low frequency selectivity, and high electrical resistivity such as titanium, titanium alloy, stainless steel, tantalum carbide, etc. It can be used as a watch case fuselage or back cover without sacrificing the receiving sensitivity, and the functions of the watch case mechanism and appearance can be improved.
- the radio timepiece of the present invention is characterized in that the non-magnetic member is made of at least one material selected from gold, silver, copper, brass, aluminum, magnesium, zinc, or an alloy thereof. i.
- the non-magnetic member is at least two or more selected from gold, silver, silver, brass, aluminum, magnesium, or an alloy thereof. Are formed by bonding.
- Such gold, silver, copper, brass, aluminum, magnesium, or an alloy thereof is a metal having an electric resistivity of 7 ⁇ -Cm or less. Or, by using it as a non-magnetic member fixed to the inner surface of the back cover, the reception sensitivity and frequency selectivity are improved, and the disturbance of the resonance phenomenon near the antenna due to the metal material can be reduced. Even with a metal watch case, sufficient reception sensitivity can be obtained.
- the antenna is constituted by a magnetic core member and a plurality of coils wound around the magnetic core member,
- the antenna includes a magnetic core member, a coil wound around the magnetic core member and a plurality of coils,
- a member of the watch case facing at least one axial end of the antenna, or a portion facing a member of the watch case facing the axial end is made of the non-magnetic member. I do.
- the non-magnetic member By arranging the non-magnetic member at such a position, the non-magnetic member is located near the antenna, and it is possible to reduce disturbance of the resonance phenomenon near the antenna due to the metal material. As a result, sufficient reception sensitivity can be obtained even with a metal watch case.
- the radio timepiece of the present invention includes: an antenna for receiving a radio wave including time information; a clock device for displaying time information such as a current time on a display unit by the radio wave received by the antenna; Anti-magnetic plate to prevent the influence of external magnetism,
- a radio clock including the antenna, a clock device, and a clock case accommodating the magnetic-resistant plate,
- the anti-magnetic plate disposed in the timepiece case has an opening at a portion facing the antenna.
- the anti-magnetic plate disposed in the watch case has an opening in a portion facing the antenna, the antenna can receive radio waves through this opening without being affected by the anti-magnetic plate. Therefore, the timepiece can be protected from external magnetism even in a radio timepiece without deteriorating the radio wave reception performance, and the driving of the hands is not affected, and the accuracy of the timepiece can be improved.
- the antenna is constituted by a magnetic core member and a coil wound a plurality of times around the magnetic core member,
- An opening is provided in the anti-magnetic plate at a position where the antenna is projected in parallel along at least one plane including the axis of the magnetic core member.
- the antenna includes a magnetic core member and a coil wound around the magnetic core member a plurality of times.
- An opening is provided in the anti-magnetic plate at a position facing at least one axial end of the antenna.
- the antenna receives radio waves through this opening without being affected by the anti-magnetic field.
- the timepiece can be protected from external magnetism even in a radio timepiece without deteriorating the radio wave reception performance, and there is no effect on the driving of the hands and the accuracy of the timepiece can be improved.
- the radio timepiece of the present invention is characterized in that the antenna is disposed so as to be located outside the magnetic-resistant plate.
- the radio timepiece of the present invention is characterized in that at least a part of the antenna protrudes from an opening of the anti-magnetic plate and is located on an inner surface side of a case body of the timepiece case.
- the radio timepiece of the present invention is characterized in that at least a part of the antenna protrudes from an opening of the anti-magnetic plate and is located on the back cover side of the timepiece case.
- the radio timepiece of the present invention is characterized in that at least a part of the antenna protrudes from an opening of the anti-magnetic plate and is located on the display plate side.
- the antenna Since the antenna is located at a position where part or all of the antenna protrudes from the opening, it can receive radio waves without being affected by the anti-magnetic plate, and without impairing the radio reception performance, In this case as well, the clock device can be protected from external magnetism, and there is no effect on the driving of the hands, and the clock accuracy can be improved.
- the radio controlled timepiece of the present invention is characterized in that the anti-magnetic plate is made of at least one material selected from pure iron or permalloy.
- the magnetic-resistant plate is made of pure iron or permalloy, the magnetic permeability is high, the clock device can be protected from external magnetism, and there is no effect on the hands driving, and the clock accuracy can be improved. Become.
- the radio timepiece of the present invention is characterized in that a nonmagnetic member having an electric resistivity of 7.0 ⁇ -Cm or less is provided on an inner surface of the magnetic-resistant plate.
- a non-magnetic member having an electric resistivity of 7.0 ⁇ -Cm or less is provided on the inner surface of the anti-magnetic plate, so that the antenna gain is increased.
- both the receiving sensitivity and the frequency selectivity are improved, and the receiving performance and clock accuracy can be improved.
- the radio timepiece of the present invention is characterized in that the non-magnetic member is provided in an opening of the magnetic-resistant plate.
- the non-magnetic member is disposed in the opening of the anti-magnetic plate at a position corresponding to the antenna, the receiving sensitivity and the frequency selectivity are improved, the antenna gain is increased, and the receiving sensitivity and the frequency selection are increased. Performance and clock accuracy can be improved.
- the non-magnetic member is made of at least one material selected from gold, silver, copper, brass, aluminum, magnesium, zinc, or an alloy thereof. Characterized by
- the nonmagnetic member is formed by joining at least two or more materials selected from gold, silver, copper, brass, aluminum, magnesium, zinc, or an alloy thereof. It is characterized by being formed.
- gold, silver, copper, brass, aluminum, magnesium, or an alloy thereof is a metal having an electric resistivity of 7 ⁇ -Cm or less.
- the antenna as a non-magnetic member fixed to the inner surface of the back cover, the gain of the antenna is increased, the receiving sensitivity and the frequency selectivity are also increased, and the receiving performance and the clock accuracy can be improved.
- the non-magnetic member has a rising portion that stands upright toward the display panel
- the rising portion is configured to restrict rotation of the magnetic field-resistant plate by contacting a part of the watch case.
- the radio timepiece of the present invention includes: an antenna for receiving a radio wave including time information; a clock device for displaying time information such as a current time on a display unit by the radio wave received by the antenna;
- a radio controlled watch comprising a watch case for storing the antenna and a watch device,
- the watch case is made of an electrically non-conductive material or a material having a low electrical resistivity
- It is characterized in that it comprises an exterior member made of an electrically conductive material mounted on the outside of the watch case.
- the radio timepiece of the present invention is characterized in that the exterior member is an exterior member that covers an outer surface of a body of the timepiece case of the timepiece case.
- the radio timepiece of the present invention is characterized in that the exterior member is an exterior member that covers an upper surface of a timepiece body of the timepiece case.
- the watch case that houses the antenna is made of a material that is electrically non-conductive or has a low electrical resistivity, and the outer member mounted on the outside of the watch case, particularly, the outer surface of the watch case body is formed.
- the covering member to be covered is electrically conductive such as metal.
- the distance between the antenna and the exterior member made of an electrically conductive material such as a metal can be increased, and the reception failure of the antenna occurs. This makes it possible for the antenna to receive radio waves satisfactorily and to improve reception performance and clock accuracy.
- a radio-controlled watch has a metallic appearance with a conductive exterior material such as metal. Is given. This allows the watch case to be viewed as if it were a solid metal, so that the watch case could be made of a non-conductive material such as synthetic resin, while maintaining the luxury and aesthetics.
- the radio timepiece of the present invention is characterized in that the electrically non-conductive material forming the timepiece case is made of at least one or more electrically non-conductive materials selected from a synthetic resin, rubber, and ceramic.
- the watch case for example, the watch case body, case back, and bezel are made of an electrically non-conductive material such as synthetic resin, rubber, and ceramic, so that the antenna can receive radio waves well and receive Performance and clock accuracy can be improved.
- the material having a low electrical resistivity constituting the watch case is at least one electrical resistance selected from gold, silver, copper, brass, aluminum, magnesium, or an alloy thereof. It is characterized by being made of a material with a low rate.
- the watch case for example, the watch case body, case back, bezel, etc.
- the watch case body is made of a material with low electrical resistivity, such as gold, silver, copper, brass, aluminum, magnesium, or alloys thereof.
- the antenna can receive radio waves well, and the receiving performance and clock accuracy can be improved.
- the radio timepiece of the present invention is characterized in that the electric conductive material forming the exterior member is at least one or more electric conductive materials selected from stainless steel, titanium, and titanium alloy.
- FIG. 1 is a sectional view showing a case structure of a radio-controlled timepiece according to an embodiment of the present invention.
- FIG. 2 is an explanatory diagram showing an example of calculating the gain and Q value of an antenna indicating the superiority of the receiving state.
- FIG. 3 is an explanatory diagram showing experimental equipment for a reception experiment using an experimental exterior.
- FIG. 4 is an exploded perspective view showing a case structure of a radio controlled timepiece according to another embodiment of the present invention.
- FIG. 5 is a cutaway plan view along the axis of the crown of FIG.
- FIG. 6 is a sectional view showing a case structure of a radio-controlled timepiece according to another embodiment of the present invention.
- FIG. 7 is a sectional view showing a case structure of a radio controlled timepiece according to another embodiment of the present invention.
- FIG. 8 is a sectional view showing a case structure of a radio controlled timepiece according to another embodiment of the present invention.
- FIG. 9 is a cross-sectional view showing a case structure of a radio-controlled timepiece according to another embodiment of the present invention.
- FIG. 10 is a plan view for explanation showing a setting state of a watch case body and an antenna in the present invention.
- FIG. 11 is an explanatory cross-sectional view showing a setting state of a back cover and an antenna according to the present invention.
- FIG. 12 is a diagram showing the relationship between the gain of the received signal and the body thickness based on the experimental results.
- FIG. 13 is a diagram showing the relationship between the gain of the received signal and the distance between the antenna and the trunk based on the experimental results.
- FIG. 14 is a diagram showing the relationship between the gain of the received signal and the thickness of the back cover based on the experimental results.
- FIG. 15 is a diagram illustrating the relationship between the gain of the received signal and the distance between the antenna and the back cover based on the experimental results.
- FIG. 16 is a cross-sectional view showing a case structure of a radio controlled timepiece according to another embodiment of the present invention.
- FIG. 17 is a sectional view showing a case structure of a radio controlled timepiece according to another embodiment of the present invention.
- FIG. 18 is a sectional view showing a case structure of a radio-controlled timepiece according to another embodiment of the present invention.
- FIG. 19 is a cross-sectional view showing a case structure of a radio controlled timepiece according to another embodiment of the present invention.
- FIG. 20 is a plan view of the anti-magnetic plate shown in FIG. 19 as viewed from the back cover direction.
- FIG. 21 is a sectional view showing a case structure of a radio-controlled timepiece according to another embodiment of the present invention.
- FIG. 22 is a sectional view showing a case structure of a radio controlled timepiece according to another embodiment of the present invention.
- FIG. 23 is a cross-sectional view showing a case structure of a radio-controlled timepiece according to another embodiment of the present invention.
- FIG. 24 is a sectional view showing a case structure of a radio controlled timepiece according to another embodiment of the present invention.
- FIG. 25 is a plan view of the anti-magnetic plate shown in FIG. 24 from the back cover direction.
- FIG. 26 is a block diagram schematically showing the function of the radio controlled watch.
- FIG. 27 is a cross-sectional view showing a conventional example of the structure of a radio-controlled wristwatch using a metal for a part of the case.
- FIG. 28 is a sectional view showing a conventional example of the structure of a general wristwatch using a magnetic-resistant plate.
- FIG. 29 is a cross-sectional view of the back cover showing an example of forming a non-magnetic member by using an electrode.
- FIG. 30 is a schematic diagram for explaining an arrangement state of the antenna of the radio-controlled timepiece of the present invention.
- FIG. 1 is a sectional view showing a case structure of a radio-controlled timepiece according to one embodiment of the present invention.
- the watch case A is composed of a watch case body 30, a back cover 33 attached to the lower surface of the watch case body 30, and a bezel (not shown). .
- the watch case body 30 has a substantially cylindrical shape, and a glass 32 is attached via a packing 31 to a step portion 30a on the inner peripheral edge of the upper opening in the figure, and the lower opening in the figure is provided.
- a back cover 33 is attached to the part by means such as press fitting, screwing, and screws.
- the back cover 33 shown in FIG. 1 is attached to the watch case body 30 by press-fitting, and a packing 4 4 is provided between the rising portion 33 a and the inner surface 30 c of the watch case body 30. Is sandwiched.
- the watch case body 30 is made of metal, and its material will be described later.
- the watch case body 30 houses the movement 34 provided with the radio timepiece receiver, the CPU, the display drive unit, and the like shown in FIG. 26 described above. Above the movement 34 in the figure, a dial 35 as a time display unit and a finger + 36 are provided.
- the movement 34 is positioned by the dial 35 contacting the lower surface of the inward protruding portion 30 b forming the step portion 30 a of the watch case body 30 in the drawing, and the back cover 33 rises. It is fixed by being sandwiched between the resin frame 45 arranged on the upper surface of the portion 33a.
- the antenna 37 includes a rod-shaped magnetic core member 38 made of a fluoride material and the like, and a coil 40 wound around the magnetic core member 38. It is fixed.
- nonmagnetic members 42 and 43 are provided on the inner surface 30c of the watch case body 30 and the inner surface 33c of the back cover 33.
- the non-magnetic member 42 has a plate shape, and is provided on the inner surface 33 c facing the movement 34 inside the rising portion 33 a of the back cover 33, and has the axis AX of the magnetic core member 38.
- the antenna 37 is arranged at a position facing the plane including the antenna and projecting parallel to the antenna 37.
- the antenna 37 is projected parallel to the horizontal plane including the axis AX of the magnetic core member 38, that is, the non-magnetic member 42 is disposed on the upper surface of the back cover 33. Have been.
- this arrangement position is not limited to that shown in FIG. 1, and the antenna 37 is projected parallel to the inner surface of the watch case along at least one plane including the axis AX of the magnetic core member 38.
- Position, for example, projected watch case body 3 0 If the non-magnetic member is arranged at the position of the back cover 33 or the position of the back cover 33 projected.
- the non-magnetic member 43 has a ring shape along the inner surface 30 c of the watch case body 30 or a curved plate that forms a part of the ring shape. It is located at the position facing the axial end of the.
- the nonmagnetic members 42 and 43 are made of a material having an electric resistivity of 7.0 ⁇ -Cm or less, and the material will be described later.
- the CPU in the movement 34 operates the display drive unit based on the standard radio wave received by the antenna 37 to drive the hands 36 so as to always correct the hands 36.
- a non-magnetic member is provided between the watch case body 30 and the antenna 37 and between the back cover 33 and the antenna 37.
- An experimental antenna with a conductor diameter of 65 / zm coil of 200 turns is installed on a 5 mm thick metal plate, and a signal of 40 kHz is transmitted from the transmitting antenna installed at a predetermined position.
- the case section 50a is made of a metal such as stainless steel that has been found to reduce reception sensitivity
- the lid section 50b is made of a metal such as brass that has been found to have good reception sensitivity
- the Q value was about 8 and the receiving sensitivity was good (Experimental Example 2). Therefore, assuming use for the watch exterior, the case section 50a is left as metal such as stainless steel, and the cover section 5 Ob is formed of a metal such as stainless steel on the outside and brass or the like on the inside.
- the use of the lid 50b made of the above metal gave a more favorable Q value of 8 to 9.
- the gain of the antenna could be improved by 1 to 2 dB compared to the case of using only metal such as stainless steel (Experimental Example 3).
- Table 1 Experimental results using the experimental exterior
- the metals provided on the outside and the inside were combined based on the electrical resistivity.
- the electrical resistivity of the metal with good receiving sensitivity was 7 ⁇ _ It has been found that by setting it to Cm or less, it is possible to maintain good reception sensitivity even if the electrical resistivity of the metal combined therewith is high.
- the non-magnetic members 42 and 43 are made of a metal of 7 ⁇ -Cm or less, the reception sensitivity will be reduced, as in titanium, titanium alloy, stainless steel, and tantalum byte, which have excellent appearance quality. It was verified that the reception sensitivity could be improved even if the watch case body 30 and the back cover 33 were formed of a metal having a low Q value (low frequency selectivity) and a high electrical resistivity.
- the case 50a and the lid 50b shown in Fig. 3 were formed of stainless steel (austenitic), and the inside of the lid 50b was formed.
- An experiment was conducted in which a thin aluminum material was provided in the furnace and its thickness was gradually increased from 0 (no aluminum material).
- the Q value increases from 9.9 when the thickness is 0 to 14.3 when the thickness is increased when the thickness is increased, and decreases when the thickness is 14.6 when the thickness is 1000 ⁇ .
- the gain of the antenna is 500 ⁇ or more, which is about 3 dB better than the case where the thickness is 0. I understood that.
- the thickness of the aluminum material reaches 50 m, the gain and the Q value rise, and around 100 m, the gain and the Q value become constant at the highest value. It has been found that it is preferable to set the thickness of 2, 43 to 50 / m or more.
- the distance between the watch case body 30 or the back cover 33 and the movement 34 or the antenna 37, or the non-magnetic members 42, 43 at the time of manufacturing and assembling It is preferable to set the value to 2000 ⁇ or less in consideration of ease of handling.
- the watch case body 30 and the back cover 33 have low receiving sensitivity and low Q value (low frequency selectivity), but titanium and titanium alloy with excellent appearance quality
- Non-magnetic members 42 and 43 have good receiving sensitivity, high Q value (good frequency selectivity), and low electrical resistivity. It is made of gold, silver, copper, brass, aluminum, magnesium, zinc, or their alloys with an electrical resistivity of 7 ⁇ -Cm or less, and the thickness is set to 50 to 200 Aim. would be most preferred.
- the non-magnetic members 42 and 43 need not be formed of only one of the above-mentioned metals, but are formed by diffusion bonding, brazing, bonding, caulking, etc. of at least two of the metals.
- nonmagnetic members 42 and 43 can be integrally joined and fixed to the watch case body 30 and the back cover 33 at the stage of the material, and then the shape can be adjusted.
- the watch case body 30 and the back cover 33 made of titanium, titanium alloy, stainless steel, etc. are made of non-magnetic material made of gold, silver, copper, brass, aluminum, magnesium, zinc, etc.
- the members are heated while being pressed against each other, diffusion bonded, and then rolled to a predetermined thickness to use the joined clad material.
- the watch case body 30 and the back cover 33 are formed with this clad material, the watch case body 30 and the back cover 33 and the non-magnetic members 42, 43 are joined to the body. They will be formed.
- non-magnetic members 42 and 43 it is also possible to form and fix the non-magnetic members 42 and 43 so as to be in close contact with the watch case body 30 and the back cover 33.
- the nonmagnetic members 42 and 43 are formed at predetermined positions on the watch case body 30 and the back cover 33 by a wet plating method, metal spraying, or the like.
- a mask 60 made of an organic material such as epoxy resin is applied to the surface of the back cover 33 except for a predetermined portion inside the rising portion 33 a of the back cover 33.
- composition and conditions of the bath at this time are as follows:
- the back cover 33 is immersed in an organic solvent to peel off the mask 60. Thereafter, the back cover 33 is washed with water and dried, whereby the non-magnetic member 42 can be formed at a predetermined position on the back cover 33.
- non-magnetic members 43 and 42 are provided on the watch case body 30 and the back cover 33, respectively, but one of the watch case body 30 and the back cover 33 has a non-magnetic member. The reception sensitivity can be increased only by providing.
- a resin plate may be provided between the non-magnetic members 42, 43 and the antenna 37, or the surfaces of the non-magnetic members 42, 43 may be covered with a resin layer, so that the antenna 37 and the non-magnetic member 4 may be provided.
- the antenna 37 may be configured so as to prevent the antenna 37 from being damaged due to contact with 2, 4 and 3.
- the receiving sensitivity can be increased without using a special configuration such as glass for the configuration of the watch case, for example, the watch case body 30 and the back cover 33.
- a wave clock can be provided.
- Titanium, stainless steel, etc. can be used for the watch case such as the watch case body 30 and the back cover 33, so that the case structure has stable waterproof quality and high-quality appearance. can do.
- watch cases such as the watch case body 30 and the back cover 33 can be designed and manufactured in the same way as ordinary watches that are not radio-controlled watches. Can be expanded to
- FIG. 4 is an exploded perspective view showing a case structure of a radio-controlled timepiece according to another embodiment of the present invention
- FIG. 5 is a cut-away plan view along an axis of a crown.
- the radio timepiece of this embodiment has two sets of a first exterior member 53 and a second exterior member 54 with respect to a watch case A having a watch case body 50, a back cover 51, and a draft shield 52. .
- a resin plate is provided between the nonmagnetic members 42 and 43 and the antenna 37, or the surfaces of the nonmagnetic members 42 and 43 are covered with a resin layer. This prevents the antenna 37 from contacting the non-magnetic members 42, 43 to damage the antenna 37, which is applied to a watch case.
- an electrically non-conductive material such as a resin plate or a material with a low electrical resistivity and applying it to the watch case body 50 and the back cover 51, these members surround the antenna. This prevents the antenna from being damaged.
- the watch case body 50 and the back cover 51 are made of an electrically non-conductive material such as synthetic resin, rubber, or ceramic, or, for example, gold, silver, copper, brass, aluminum, or magnet. Made of low electrical resistivity material such as shims or their alloys, In addition, the windshield 52 is made of glass of non-conductive material, the watch case body through packing
- the watch case body 50 is cylindrical and has a crown 56 protruding.
- a dial, hands (not shown), and a movement 60 and a bar antenna 61 are housed as shown in FIG.
- the dial is made of a non-conductive material such as synthetic resin or ceramic.
- the movement 60 has a small step at the bottom and a wide step 63 formed.
- the back cover 51 is an annular projection
- the bar antenna 61 consists of a magnetic core member 67 and a coil 68 wound around it, and is glued under the wide step 63 of the movement 60 parallel to the crown 56 as shown in FIG. That is, the bar antenna is housed at a lower position in the lower part of the case.
- the first exterior member 53 and the second exterior member 54 are made of a thin conductive material such as stainless steel, titanium, and titanium alloy! , Made of materials.
- the first exterior member 53 has an annular disk shape, and has a slope 53 a that descends outward at an upper portion, and a stepped portion 53 b at a lower surface. It is adhered to the flat part 50d of the annular projection on the top surface of the zero.
- the second exterior member 54 includes a cylindrical side surface covering portion 54a that covers the side surface of the body and an upper inwardly engaging portion 54b, and the upper surface of the engaging portion 54b. Is a slope having the same slope as the slope 53a of the first exterior member 53, and the appearance is adjusted.
- band connecting legs 76 are formed at both ends.
- the side cover 54 a is fixed to the side surface of the watch case body 50 with screws 71.
- An opening 73 from which the crown 56 protrudes is formed in the side cover 54 a.
- the engaging portion 54b is pressed into engagement with a step portion 50c of the watch case body 50.
- the thickness of the side cover 54 a in the radial direction is small, and the thickness of the watch case body 50 is large. Therefore, the side cover 54 a is separated from the bar antenna 61 by a greater distance.
- the thickness of the body is large, and the reception obstruction is extremely reduced despite the fact that the side cover part 54a of the second exterior member 54 is large and covers the side face of the watch case body 50. be able to.
- the watch cases such as the watch case body 50 and the back cover 51 accommodating the antenna 61 are made of a material that is electrically non-conductive or has a low electric resistivity.
- the first exterior member 53 and the second exterior member 54 mounted on the outside, in particular, the second exterior member 54 that covers the outer surface of the watch case body are electrically conductive such as metal.
- the antenna 61 and the first exterior member 53 and the second exterior member 54 that are electrically conductive such as metal are used. Since the distance between the antenna 61 and the antenna 61 can be increased, the reception failure of the antenna 61 is unlikely to occur, whereby the antenna 61 can receive radio waves well, and the receiving performance and the clock accuracy can be improved.
- the present invention is applied to the watch case body 50 and the back cover 51 so that these members surround the antenna.
- the antenna can be prevented from being damaged.
- the conductive first exterior member 53 and the second exterior member 54 made of metal or the like are used. This gives the radio-controlled timepiece a metallic appearance. This allows the watch case to be visually perceived as a solid metal, so that the watch case is made of a non-conductive material such as synthetic resin, but does not detract from the luxury and beauty. (Example 3)
- the watch case body and back If it is made of non-magnetic material such as gold, silver, copper, brass, aluminum, magnesium, zinc and their alloys with a rate of 7 ⁇ —Cm or less, the reduction in reception sensitivity is suppressed and the metal watch case can Can be used for watches.
- non-magnetic material such as gold, silver, copper, brass, aluminum, magnesium, zinc and their alloys with a rate of 7 ⁇ —Cm or less
- the other parts may be made of titanium, titanium alloy, stainless steel, tungsten carbide, tantalum carbide, etc. Sensitivity can be improved.
- the non-magnetic member need not be formed of only one of the above metals, but can be formed by bonding at least two of the metals by diffusion bonding, brazing, bonding, caulking, or the like. Similar effects were observed when the watch case or a part thereof was formed.
- FIG. 6 is a sectional view showing a radio-controlled timepiece case according to another embodiment of the present invention.
- the watch case body 30 has a substantially cylindrical shape, and a glass 32 is attached via a packing 31 to a step portion 30a on the inner peripheral edge of the upper opening in the figure, and the lower opening in the figure is provided.
- a back cover 33 is attached to the part by means such as press-fitting, screwing, and screws.
- the back cover 33 shown in FIG. 6 is attached to the watch case body 30 by press-fitting.
- the packing 44 is sandwiched between the rising portion 33 a and the inner surface 30 c of the watch case body 30.
- the watch case body 30 and the back cover 33 in this embodiment are made of a brass material that is a non-magnetic member having an electrical resistivity of 7.0 ⁇ -Cm or less for achieving a good reception sensitivity in the above-described experiment. It is made of a main body composed of 30d and 33d, and is mirror-finished. After that, the plating layers 30e and 33e of Pd etc. are formed on the surface by wet plating. Has become.
- the plating layers 3 ⁇ e and 33 e of the watch case body 30 and the back cover 33 are formed by the following wet plating.
- the main body portion 3 0 d, 3 3 d, plated bath composition: N a 2 S N_ ⁇ 3 ⁇ 3H 2 0 6 0 g / 1 ( liter), C u CN 2 0 g / 1, K 2 SO s H 1 0 g / 1, KCN ( free) .3 0 g 1, KOH 6 0 g / l, Z n (CN) 2 5 g / 1),
- the plating is performed under the following conditions.
- an undercoat layer of Cu—Sn—Zn alloy of about 2 ⁇ is formed on the surfaces of the main bodies 30 d and 33 d.
- the Sn—Cu—Pd alloy plating layer is formed by applying plating on the base plating layer under the following conditions.
- a Sn—Cu—Pd alloy plating layer having a thickness of about 3 m, a hardness (Hv) of about 300 and a density of 9.6 gZcm 3 is formed on the underlying plating layer.
- Hv hardness
- a density of 9.6 gZcm 3 is formed on the underlying plating layer.
- a finish plating layer is formed on the Sn—Cu—Pd alloy plating layer under the following conditions.
- a Pd plating layer having a thickness of about 2 ⁇ and having white luster is formed, and plating layers 30 e and 33 e are completed.
- the watch case body 30 and the back cover 33 on which the plating layers 30 e and 33 e are formed as described above are the watch case body 30 and the back cover 33 on which the plating layers 30 e and 33 e are formed as described above.
- the watch case body 30 and the back cover 33 did not show any peeling of the plating layers 30 e and 33 e even when subjected to a heating test in which the watch case was left at 200 ° C. for 5 hours. Heat resistance is also good.
- the movement 34 having the above-described radio timepiece receiver, CPU, display drive unit and the like shown in FIG. 26 is housed.
- a dial 35 and a pointer 36 as a time display section are provided above the movement 34 in the figure.
- the movement 34 is positioned by the dial 35 contacting the lower surface in the figure of the inwardly protruding portion 30 b forming the step portion 30 a of the watch case 30, and the rising portion of the back cover 33. 3 3a It is fixed by being sandwiched between.
- a predetermined space is provided between the movement 34 and the back cover 33, and an antenna 37 is arranged in the space.
- the antenna 37 includes a rod-shaped magnetic core material 38 made of a ferrite material or the like, and a coil 40 wound around the magnetic core material 38. Fixed.
- the CPU in the movement 34 operates the display drive unit based on the standard radio wave received by the antenna 37 to drive the hands 36 so as to always correct the hands 36.
- the watch case body 30 and the back cover 33 are formed of a non-magnetic material, disturbance of the resonance phenomenon near the antenna is reduced, and the reception sensitivity is reduced. Have improved.
- the watch case body 30 and the back cover 33 are surface-finished, so they have the corrosion resistance and heat resistance required when used as a watch case. Since it has a glossy white metallic luster, the appearance quality is also high.
- FIG. 7 is a sectional view showing a radio-controlled timepiece case according to another embodiment of the present invention.
- the structure of this embodiment is the same as that of the third embodiment described above, and the watch case body 30 and the back cover 33 have different materials and surface finishes. Will be described.
- the watch case body 30 in this embodiment is formed of a main body 30 f made of a tungsten carbide material (carbide material), is mirror-finished, and then has a surface layer 30 g formed by dry plating. Is formed and finished.
- the back cover 33 is made of a brass material, which is a nonmagnetic member having an electric resistivity of 7.0 ⁇ -Cm or less, is mirror-finished, and then has the Cu—Sn—
- a base plating layer of Zn alloy and a plating layer of Sn—Cu—: Pd alloy are formed by wet plating, and a plating layer 33 i is formed on the surface thereof by dry plating (the plating layer formed on the watch case body 30). ) Is formed and finished.
- the plating layers 30 g and 33 i are formed by plating in the following steps.
- a CuSn—Zn alloy base plating layer and a Sn—Cu—Pd alloy plating layer are formed on the surface of the back cover 33 using the plating bath and conditions described in Example 3. .
- the back cover 33 and the main body 30f made of tungsten carpide are degreased, washed, and dried. Then, set the main body portion 30 f and a back lid 33 to the ion plating apparatus, a vacuum degree in the apparatus by introducing argon gas After evacuating the apparatus to 1. 0 X 10- 2 T orr .
- an argon plasma is generated by operating a thermoelectron filament and a plasma electrode provided in the apparatus, and the surface is cleaned with an ion bumper for 10 minutes.
- the vacuum degree in the apparatus by introducing nitrogen gas 2. maintained 0X 10- 3
- evaporated T i 5 minutes while generating a plasma in a plasma gun device in the apparatus the watch case A 0.25 ⁇ m thick TiN layer is formed on the surfaces of the body 30 and the back cover 33.
- an Au—Ti alloy containing 50 atomic% of the titanium alloy 1 was evaporated to form a 0.3-111 octa-T on the TiN layer.
- An i-alloy plating layer is formed to complete plating layer 30 g and 33 i.
- the watch case body 30 and the back cover 33 on which the plating layers 30 g and 33 i are formed as described above have a golden luster, and the color tone is 1 N of the Swiss gold plating color standard. — Can provide a uniform designated gold tone that satisfies 14 colors.
- the color tones actually measured by the color difference meter were L'80, a'1.0, and b'15.0.
- the plating layers 30 g and 33 i thus formed showed that 88 atomic% of gold, 6.5 atomic% of titanium, 0.5 atomic% of nitrogen, It consisted of 2 at% oxygen and 3 at% carbon.
- the back cover 33 is formed of a non-magnetic member, so that the disturbance of the resonance phenomenon near the antenna is disturbed. It has been reduced and the receiving sensitivity has been improved.
- the watch case body 30 and the back cover 33 are formed with a plating layer and surface-finished, so that they have the corrosion resistance necessary for use as a watch case. In addition, it has a high-quality gold color, so its appearance is high.
- the watch case body 30 When tungsten carbide is used for the watch case body 30 as in this embodiment, it may be possible to use the watch case as a watch case without merely applying a dry finish by merely finishing the surface of the watch case with a mirror finish.
- FIG. 8 is a sectional view showing a radio-controlled timepiece case according to another embodiment of the present invention.
- the structure of this embodiment is the same as that of the third embodiment, and Since the material and surface finish of the body 30 and the back cover 33 are different, the material and surface finish will be described in detail.
- the watch case body 30 in this embodiment is entirely made of stainless steel (austenitic), and has a hairline basis finish on the surface.
- the back cover 33 has a main body 33 f made of stainless steel (austenitic), and is filled in an opening provided in the main body 33 f and brazed.
- g is made of brass, which is a non-magnetic material with an electrical resistivity of 7.0 ⁇ -Cm or less. After that, a plating layer 33 h is formed on the surface by wet plating or dry plating. It has been finished.
- the plating layer 33 h is formed by plating in the following steps.
- a wet plating was performed under the same conditions as in Example 3 described above, and a Cu—Sn—Zn alloy plating layer, Sn_Cu—Pd An alloy plating layer and a Pd plating layer are sequentially formed.
- the main body 33 f made of stainless steel is washed with an organic solvent together with 33 g of the filling member on which the plating layer is formed, and is placed in an ion plating apparatus. Then, in the apparatus 1. 0 X 1 0- 5 was evacuated to T orr, introducing argon gas until 3 X 1 0- 3 T orr. Next, the plasma of the argon is formed by driving the thermionic filament and the plasma electrode provided in the apparatus.
- a potential of 150 V is applied to the back cover 33, and bombard cleaning is performed for 10 minutes. Then, stop the introduction of argon gas, nitrogen gas was introduced until 1. 0 X 1 0- 3 T orr into the apparatus, after the flop plasma was generated in the plasma gun provided inside device, the T i 1 Evaporate for 0 minutes to form a coating of 0.5 ⁇ on the surface of the back cover 33 with a Ti nitride having a nitriding degree of 0.2 to a thickness of 0.5 ⁇ . Evacuated to 0 X 1 0- 5 T orr.
- a gold one cobalt mixture composed of gold 5 5 atomic% cobalt 4 5 atomic% Evaporation stops the evaporation of the gold-cobalt mixture when the thickness of the deposited gold-cobalt alloy film reaches 0.3 ⁇ .
- Such plated layer 3 3 h formed in the analyzed by X-ray photoelectron spectroscopy consists of gold 6 3 atom 0/0 and cobalt 3 7 atoms 0/0, the plated layer 3 3 h is formed
- the back cover 33 thus obtained has a uniform white tone with brightness.
- the back cover 33 has a portion formed of a non-magnetic member. Therefore, the disturbance of the resonance phenomenon near the antenna is reduced, and the receiving sensitivity is improved.
- the surface finish is applied by forming the plating layer 33 h on the filling member 33 g and the body 33 f of the back cover 33, which is necessary when used as a watch case. It has excellent corrosion resistance, etc., and has a high-quality white tone, so the appearance quality is also high.
- the opening of the main body 33 f of the back cover 33 in this embodiment is preferably formed to be slightly larger than the outer shape of the antenna 37.
- FIG. 9 is a sectional view showing a radio-controlled timepiece case according to another embodiment of the present invention.
- the structure of this embodiment is the same as that of the third embodiment described above, and the watch case body 30 and the back cover 33 have different materials and surface finishes. And surface finish.
- the watch case body 30 in this embodiment is made of an 18 mm gold alloy material (containing silver and copper) which is a nonmagnetic member having an electric resistivity of 7.0 ⁇ / cm or less. It is formed and the surface is mirror-finished.
- the back cover 33 is entirely made of stainless steel (austenitic). In the watch case of this embodiment, even if the back cover 33 is formed of stainless steel, the watch case body 30 is formed of a non-magnetic member, so that disturbance of the resonance phenomenon near the antenna is reduced. The reception sensitivity is improved.
- the watch case in the third to seventh embodiments is composed of the watch case body 30 and the back cover 33, and the watch case body 30 provided with a bezel ring at the top is used. You can also.
- the receiving sensitivity can be improved.
- the receiving sensitivity can be improved by forming not only the entire body, the bezel, and the back cover with a non-magnetic member but also a part of them with a non-magnetic member. In that case, it is effective and preferable to form only the portion where the antenna 37 is projected in parallel or only the portion facing the end of the antenna 37 with a nonmagnetic member.
- non-magnetic member In addition to using only one type of non-magnetic member, it is possible to use a combination of a plurality of non-magnetic members.
- the body thickness T1 of the watch case body 25, the distance D1 between the antenna 26 and the inner surface of the watch case body 25, the back cover thickness T2 of the back cover 27, and the antenna 26 was selected as a parameter. Then, the relationship between these four parameters and the gain, which is the peak height of the signal received by the antenna 26, was determined by experiments.
- the watch case body 25, antenna 26, and back cover 27 used in the experiments described below were formed on the assumption that they were used as watches.
- the material of the watch case body 25 and the back cover 27 is stainless steel, titanium, titanium alloy, gold, silver in consideration of good workability, durability, corrosion resistance, good appearance quality as a product, and price.
- Copper, brass, aluminum, zinc, magnesium or their alloys, and alloys containing tungsten carbide and tantalum carbide as cemented metals were selected.
- the gain of the received signal was measured when the body thickness T1 was changed from 0 to 5000 m.
- the distance D1 between the watch case body 25 and the antenna 26 is set to a constant value of 1000 ⁇ m
- the back cover 27 has a back cover thickness T2 of 80 Ozm
- the antenna 26 and the back cover The distance D2 to 27 was set constant at 100 ⁇ .
- an experiment was conducted in which a signal of 40 kHz was transmitted from a transmitting antenna installed at a predetermined position.c
- the gain of the received signal was expressed as the body thickness T 1 force S 0 ⁇ m m (without the watch case body 25), it gradually decreases as the body thickness increases, and saturates when the body thickness T1 reaches 5000 m.
- the body thickness T 1 In consideration of the strength and the like that can be used as a watch case within the above range, it is preferable to set the body thickness T 1 to a range from 300 ⁇ to 5000 m, which is practically the maximum. In addition, in order to form a body most suitable for a watch case in consideration of appearance, workability, corrosion resistance, and the like, it is preferable to set the body thickness ⁇ 1 in the range of 500 to 2000 ⁇ m. '2— 3. Relationship between distance D 1 between antenna 26 and watch case body 25 and reception sensitivity: In this experiment, distance D 1 between antenna 26 and watch case body 25 was varied from 0 to 40 000 ⁇ . The gain of the received signal at that time was measured.
- FIG. 13 shows the measurement results from 0 to 20000 ⁇ .
- a watch case body 25 with a body thickness T1 force of 2000 ⁇ is used, a back cover 27 with a back cover thickness T 2 force of 800 ⁇ is used, and a distance D 2 between the antenna 26 and the back cover 27 is set. It was set constant at 100 ⁇ m.
- the gain of the received signal is about 1 at the distance D 1 of ⁇ ⁇ m (when the part of the antenna 26 is in contact with the watch case body 25).
- the gain of the received signal when only the back cover 27 was used was 50.34 dB, so that the antenna 26 and the antenna 26 when the gain reached this value were used.
- the increase in gain is saturated.
- the distance D1 at which the increase in gain is saturated is not shown in FIG. 13, but is 40,000 ⁇ , and the gain cannot be increased even if the antenna 26 and the watch case body 25 are further separated. Become. Note that the solid line shown in FIG. 13 is an approximate curve obtained from experimental data.
- the gain increases when the distance D 1 between the antenna 26 and the watch case body 25 increases, and the receiving sensitivity becomes good.However, when the distance D 1 exceeds 40,000 ⁇ m, the gain decreases. It was found that the rise was saturated and constant.
- the distance D1 is set between 0 and 40,000 ⁇ m, the gain can be improved. Within the above range, it is preferable to set the distance D 1 to 500 to 10000 ⁇ in consideration of a size usable as a watch case and the like. 2-4. Relationship between back cover thickness T 2 and receiving sensitivity:
- the gain of the received signal was measured when the case thickness ⁇ 2 was changed from 0 to 5000 m.
- FIG. 14 shows the measurement results from 0 to 3000 // m.
- the distance D1 between the watch case body 25 and the antenna 26 is set to a constant value of 1000 ⁇ m
- the watch case body 25 having a body thickness T1 of 2000 is used
- the distance between the antenna 26 and the back cover 27 is Distance D 2 was set constant at 100 m. Then, an experiment was conducted in which a 40-kHz signal was transmitted from a transmitting antenna installed at a predetermined position.
- the gain of the received signal decreases sharply from about 13.4 d d of the case back thickness T 2 of 0 ⁇ (without case back 27) to 800.
- the gain did not change so much from the case thickness T 2 of 800 ⁇ m to 5000 im.
- FIG. 14 does not show up to 5000 ⁇ .
- the minimum value may be practically acceptable, and within the above range, considering the strength that can be used as a watch case, etc., set the back cover thickness T 2 to a range from 100 m to 5000 / m, which is the maximum practically. Is preferred.
- the back cover thickness ⁇ 2 in the range of 300 to 2000 ⁇ m. 2-5. Relationship between the distance D2 between the antenna 26 and the back cover 27 and the receiving sensitivity: In this experiment, the reception when the distance D2 between the antenna 26 and the back cover 27 was varied from 0 to 5000 ⁇ m. The gain of the resulting signal was measured.
- a watch case body 25 with a body thickness T 1 force of 2000 is used
- a back cover 27 with a back cover thickness T 2 of 800 ⁇ is used
- the distance D between the watch case body 25 and the antenna 26 is D 1 was set to 1000 ⁇ m.
- the gain of the received signal starts at about –49.6 dB when the distance D 2 is 0 ⁇ m (when part of the antenna 26 is in contact with the back cover 27). As it goes away, it rises gradually.
- the gain of the received signal when only the watch case body 25 was used was 18.8 dB, so that the antenna 26 when the gain was approximately this value was obtained.
- the increase in the gain is saturated at the distance D2 between the camera and the back cover 27.
- the distance D 2 at which the increase in gain is saturated is 5000 ⁇ m, and even if the antenna 26 and the back cover 27 are further separated, the gain cannot be increased.
- the solid line shown in Fig. 15 is the approximate curve obtained from the experimental data.
- the gain can be improved by setting the distance D2 between 0 and 5000 ⁇ m. You can do it. Within the above range, it is preferable to set the distance D2 to 100 to 700 zm in consideration of a size usable as a watch case and the like. Next, examples based on the results of the above experiments will be described.
- FIG. 16 is a sectional view showing a radio-controlled timepiece according to another embodiment of the present invention.
- the watch case body 30 has a substantially cylindrical shape, and a glass 32 is attached via a packing 31 to a step portion 30a on the inner peripheral edge of the upper opening in the figure, and the lower opening in the figure is provided.
- a back cover 33 is attached to the part by means such as press-fitting, screwing, and screws.
- the back cover 33 shown in Fig. 16 is attached to the watch case body 30 by press-fitting, and a packing 4 is provided between the rising portion 33a and the inner surface 30c of the watch case body 30. 4 is sandwiched.
- the watch case body 30 houses the movement 34 provided with the radio timepiece receiver, the CPU, and the display drive unit shown in FIG. 26 described above. Above the movement 34 in the figure, a dial 35 and a pointer 36 as a time display section are provided. The movement 34 is positioned by the dial 35 contacting the lower surface of the inward protruding portion 30 b forming the step portion 30 a of the watch case 30 in the drawing, and the back cover 33 rises. It is fixed by being sandwiched between the resin frame 45 arranged on the upper surface of the portion 33a.
- a predetermined space is provided between the movement 34 and the back cover 33, and an antenna 37 is arranged in the space.
- the antenna 37 includes a rod-shaped magnetic core material 38 and a coil 40 wound around the magnetic core material 38, and is fixed to the lower surface of the movement 34.
- both the watch case body 30 and the back cover 33 are made of austenitic stainless steel (for example, SUS316L). Also, based on the above experimental results, the body thickness T1 of the watch case body 30 was set to 1600 / im, and the distance D1 from the antenna 37 to the inner surface of the watch case body 30 was set to 200. It is set to 0 ⁇ .
- the back cover thickness ⁇ 2 of the back cover 33 is set to 800 ⁇ , and the distance D 2 from the antenna 37 to the inner surface of the back cover 33 is set to 300 ⁇ .
- the CPU in the movement 34 operates the display drive unit based on the standard radio wave received by the antenna 37 to drive the hands 36 so as to always correct the hands 36.
- the watch case body 30 and the back cover 33 are formed of a metal such as stainless steel having a low reception sensitivity as described in the first embodiment. Since the back cover thickness and the distance between the antenna and the body back cover are set to values based on the experimental results that optimize the reception sensitivity, the disturbance of the resonance phenomenon near the antenna is reduced, and the reception sensitivity is reduced. Has been improved.
- the electric resistivity of 7.0 ⁇ m such as gold, silver, copper, brass, anoremium, zinc, magnesium, or an alloy thereof, is provided on the inner surface of the back cover 33 or the inner surface of the watch case body 30. It has been confirmed in experiments in Example 1 that the gain is improved by about 2 to 3 dB when a non-magnetic member of ⁇ -Cm or less is attached.
- FIG. 17 is a sectional view showing a radio-controlled timepiece according to another embodiment of the present invention.
- This embodiment is based on the basic configuration of the watch case body 30 and the back cover 33, etc. Are the same as in Example 8, the material of the watch case body 30 and the back cover 3, the body thickness T l of the watch case body 30, the distance D 1 between the antenna 37 and the watch case body 30, the back cover Since the back cover thickness of 33 is 2 and the distance D 2 between the antenna 37 and the back cover 33 is different, these will be described in detail.
- the watch case body 30 and the back cover 33 in this embodiment are made of titanium.
- the body thickness ⁇ 1 is set to 200 m, which is thicker than in Example 8, assuming a standard corresponding to high pressure waterproofing.
- the back cover thickness T 2 is also set to 1000 / zm.
- the distance D 1 between antenna 37 and watch case body 30 is set to 500 ⁇ m
- the distance D 2 between antenna 37 and back cover 33 is set to 40
- the watch case body 30 and the back cover 33 are formed of a metal such as titanium having low reception sensitivity as described in the first embodiment, but the body thickness, the back cover thickness, Since the distance between the antenna, the body and the back cover is set to a value based on the experimental results that optimize the receiving sensitivity, the disturbance of the resonance phenomenon near the antenna is reduced and the receiving sensitivity is improved.
- the same non-magnetic member as that of the above-described embodiment 8 is attached to the inner surface of the back cover 33 or the inner surface of the watch case body 30, so that the gain is 2 to 3 dB. It is possible to improve the degree.
- FIG. 18 is a sectional view showing a radio-controlled timepiece according to another embodiment of the present invention.
- the basic configuration of the watch case body 30 and the back cover 33 is substantially the same as that of the eighth and ninth embodiments, and the material of the watch case body 30 and the back cover 33 Therefore, these will be described in detail.
- the watch case body 30 and the back cover 33 in this embodiment are formed of brass body portions 30d and 33d, are mirror-finished, and thereafter are plated with Pd or the like by wet plating.
- the layers 30e and 33e are formed and finished.
- the brass material is a non-magnetic material having an electrical resistivity of 7.0 ⁇ -Cm or less, which makes the receiving sensitivity confirmed in the experiment of Example 1 in a good state. Is further improved.
- the case of the watch case body 30 and the back cover 33 in this embodiment is the same as that of the embodiment 8 except that a plating is applied, and the body thickness T1 is set to 160 0 ⁇ ⁇ .
- the lid thickness T2 is set at 800 Atm.
- the distance between the antenna 37 and the watch case body 30 and the back cover 33 is set as the distance D 1 between the antenna 37 and the watch case body 30 to 200, and the distance between the antenna 37 and the watch case body 30 is set to 200.
- the distance D 2 between 7 and the back cover 3 is set to 30.0 ⁇ m.
- the watch layers 30 e and 33 e of the watch case body 30 and the back cover 33 are formed by wet plating as described below.
- plating bath in order to form the base plating layer, on the main body 30d and 33d, plating bath:
- the plating is performed under the following conditions.
- an undercoat layer of Cu—Sn_Zn alloy of about 2 ⁇ is formed on the surfaces of the main bodies 30 d and 33 d.
- plating is performed on the base plating layer under the following conditions to form a Sn—Cu—Pd alloy plating layer.
- a S ⁇ -Cu—Pd alloy plating layer having a thickness of about 3 ⁇ , a hardness ( ⁇ ) of about 300 and a density of 9.6 g / cm 3 is formed on the underlying plating layer. It was simplified quantified composition of the plated layer in scanning electron microscopic and X-ray microanalyzer, S n: 1 7. 1 2 wt 0/0, C u: 44. 22 weight 0/0, P d: 38. 6 It was confirmed to be a 6% by weight ternary alloy.
- a finish plating layer is formed on the Sn—Cu_Pd alloy plating layer by applying plating under the following conditions.
- a Pd plating layer having a thickness of about 2 ⁇ m and having white gloss is formed, and plating layers 30 e and 33 e are completed.
- the watch case body 30 and the back cover 33 did not show any peeling of the plating layers 30 e and 33 e even when subjected to a heating test in which the watch case was left at 200 ° C. for 5 hours. Heat resistance is also good.
- the watch case body 30 and the back cover 33 are made of metal, but the thickness of the body, the thickness of the back cover, the distance between the antenna and the body and the back cover, and the reception sensitivity are respectively optimized. Since the values are set based on the experimental results, the disturbance of the resonance phenomenon near the antenna is reduced and the receiving sensitivity is improved.
- the watch case body 30 and the back cover 33 are surface-finished to provide the corrosion resistance and heat resistance required for use as a watch. Because of the gloss, the appearance quality is also high. Note that in Examples 8 to 10 also, the inner surface is flattened without forming a rising portion on the back cover 33 as in the back cover 33 shown in FIG. With the secondary shape, the disturbance of the resonance phenomenon around the antenna 37 can be reduced and the receiving sensitivity can be improved by about 2 dB as compared with the case where the rising portion is provided.
- the distance between antenna 37 and watch case body 30 or back cover 33 can be reduced to 0, taking into account the directivity of antenna 37. It is.
- the antenna 37 is arranged such that the outer surface of the antenna 37 is parallel to the inner surface of the watch case body 30 or the inner surface of the back cover 33, while taking into consideration the directivity of the antenna 37, One end face of antenna 37 is arranged substantially perpendicular to the inner surface of back cover 3 3 It is also possible to arrange it vertically.
- the watch case in Examples 8 to 10 is composed of the watch case body 30 and the back cover 33, but a watch case body with a bezel ring on the top is used. You can also.
- the reception sensitivity can be further improved.
- the reception sensitivity can be improved by forming the bezel and the like separately from the body.
- the receiving sensitivity can be improved by forming not only the entire body, the bezel, and the back cover with a non-magnetic member but also a part of them with a non-magnetic member. In that case, it is effective and preferable to form only the portion where the antenna 37 is projected in parallel or only the portion facing the end of the antenna 37 with a nonmagnetic member.
- the experimental body and back cover made of the materials used were used for the experiment.
- the watch case is made of a metal with high electrical resistivity, such as stainless steel, titanium, titanium alloy, or tantalum carbide, which has excellent appearance quality, as long as there is a portion made of the above non-magnetic member, It has been verified that it is possible to improve the reception sensitivity.
- a metal with high electrical resistivity such as stainless steel, titanium, titanium alloy, or tantalum carbide
- FIG. 19 is a cross-sectional view of a radio-controlled timepiece according to another embodiment of the present invention
- FIG. 20 is a plan view of the anti-magnetic plate 38 shown in FIG.
- the watch case 12 in this embodiment includes a watch case body 14, a back cover 16, and a glass 18.
- the watch case body 14 has a substantially cylindrical shape, and is located on the inner peripheral edge of the upper opening in the figure.
- a glass 18 is attached to the stepped portion 14a via a packing 20, and a back cover 16 is attached to the opening at the bottom in the figure by means of press-fitting, screwing, screws or the like.
- the back cover 16 shown in Fig. 19 is attached to the watch case body 14 by press fitting, and between the rising portion 16a and the inner surface 14c of the watch case body 14. Packing 22 is sandwiched.
- a movement 24 including a radio-controlled timepiece receiver, a CPU, and a display drive unit is housed in the watch case body 14.
- a dial 26 as a time display part and a hand 28 are provided.
- the movement 24 is positioned by the dial 26 abutting against the lower surface of the inward protruding portion 14 b forming the step portion 14 a of the watch case body 14 in the drawing, and the back cover 16 rises. It is fixed by being sandwiched between a resin middle frame 30 provided on the upper surface of the portion 16a.
- a predetermined space is provided between the movement 24 and the back cover 16, and the antenna 32 is placed in the space.
- the antenna 32 is composed of a rod-shaped magnetic core material 34 made of a ferrite material or the like and a coil 36 wound around the magnetic core material 34, and is fixed to the lower surface of the movement 24. ing.
- a magnetic-resistant plate 38 is provided in a space between the movement 24 and the back cover 16.
- the anti-magnetic plate 38 is made of ferritic stainless steel (for example, SUS430). As shown in the plan view from the back cover direction in FIG. 20, the plane shape is the plane of the movement 24. It has a circular shape similar to the shape, has a U-shaped cross section, and has a rising portion 38a on the outer peripheral portion.
- the anti-magnetic plate 38 in this embodiment moves the tip of the rising portion 38a. It is fixed to the movement 24 by biting and fixing it to the movement 24.
- an opening 38 b is provided in the anti-magnetic plate 38.
- the opening 38 b is provided so as to be located at a portion facing the antenna 32 (a portion facing the antenna 32) when the anti-magnetic plate 38 is attached to the movement 24.
- the antenna 32 is arranged at a corner of the lower surface of the movement 24 so that the axis of the magnetic core material 34 is oriented in a direction orthogonal to the front and back directions of the timepiece.
- the opening 38 b of the anti-magnetic plate 38 is provided at a portion where the antenna is projected onto the anti-magnetic plate 38 so as to be parallel to a plane including the axis of the magnetic core material 34 of the antenna 32. .
- the inner dimension of the opening 38 b is set slightly larger than the outer dimension of the antenna 32.
- the CPU in the movement 24 operates the display drive unit based on the standard radio wave received by the antenna 32 to drive the hands 28 so as to always correct the hands 28.
- the movement 24 is surrounded by the anti-magnetic plate 38, the driving of the hands is not affected by the external magnetism.
- the magnetic shield 38 is provided with an opening 38b, the antenna 32 is open in the direction of the back cover 16 so that radio signals can be received without being blocked by the magnetic shield 38. Is possible.
- FIG. 21 is a sectional view of a radio controlled timepiece according to another embodiment of the present invention.
- the basic configuration relating to the structure of the watch case 12 and the anti-magnetic plate 38 is not described. This is the same as in the first embodiment, and the positional relationship between the anti-magnetic plate 38 and the antenna 32 is different from that in the embodiment 11, so that the different point will be described in detail here.
- a magnetic-resistant plate 38 made of pure iron is attached to the lower portion of the movement 24 so as to be in contact with the lower surface of the movement 24.
- the antenna 32 projects from the opening 38 b of the anti-magnetic plate 38 toward the back cover 16 and is positioned outside the anti-magnetic plate 38.
- the antenna 32 is located at a place not surrounded by the anti-magnetic plate 38, and can receive a radio signal without being affected by the anti-magnetic plate 38.
- the anti-magnetic plate 38 can be adhered to the movement 24 using an adhesive and fixed. .
- FIG. 22 is a sectional view of a radio-controlled timepiece according to another embodiment of the present invention.
- This embodiment is the same as the embodiment 11 in the basic configuration such as the watch case 12 and the positional relationship between the anti-magnetic plate 38 and the antenna 32, and the embodiment 1 is provided with a non-magnetic member 40. Since this is different from 1, the non-magnetic member 40 will be described in detail.
- the non-magnetic member 40 is made of a metal material having an electric resistivity of 7.0 ⁇ -Cm or less, such as gold, silver, copper, brass, aluminum, magnesium, zinc, or an alloy thereof. In this embodiment, a plate-shaped copper material is used.
- the anti-magnetic plate 38 is made of a YUS material (cladding material), and is located between the movement 24 and the back cover 16 as in the embodiment 11, and the antenna 32 is mounted on the anti-magnetic plate. It is arranged so that it is located on the movement 24 side than 38.
- the non-magnetic member 40 is disposed between the above-described anti-magnetic plate 38 and the antenna 32, and in this embodiment, is mounted on the inner surface of the anti-magnetic plate 38 facing the antenna 32.
- the reception gain of the radio signal is improved by about 2 to 3 dB. Has been confirmed in experiments.
- the nonmagnetic member 40 of this embodiment is provided with an opening 40b at a position corresponding to the opening 38b of the anti-magnetic plate 38.
- the structure does not hinder reception.
- the non-magnetic member 40 can be subjected to a surface treatment such as plating to prevent corrosion, and no decrease in the receiving sensitivity due to the surface treatment was observed. (Example 14)
- FIG. 23 is a sectional view of a radio-controlled timepiece according to another embodiment of the present invention.
- the basic configuration such as the watch case 12 and the positional relationship between the anti-magnetic plate 38 and the antenna 32 is the same as that of the eleventh embodiment. Since the point in which the magnetic member 42 is provided is different from that of the embodiment 11, this different point will be described in detail.
- the non-magnetic member 42 is made of a metal material having the same electrical resistivity as that of Example 13 described above, that is, 7.0 ⁇ -Cm or less. In this example, a material made of brass is used. ing.
- the anti-magnetic plate 38 in this embodiment is made of ferritic stainless steel (eg, For example, it is made of SUS430), and is disposed between the movement 24 and the back cover 16 in the same manner as in Example 11 described above, and faces the antenna 32 attached to the lower surface of the movement 24. It has an opening 38b at the location.
- the non-magnetic member 42 is attached to the opening 38 b of the anti-magnetic plate 38 by a force crimp, a lip, a bonding or the like, and faces the antenna 32.
- the non-magnetic member 42 can be subjected to surface treatment such as plating, as in the case of the non-magnetic member 40 in Embodiment 13; therefore, the decrease in receiving sensitivity due to the surface treatment is not affected. I was not able to admit.
- FIG. 24 is a cross-sectional view of a radio-controlled timepiece according to another embodiment of the present invention
- FIG. 25 is a plan view of the anti-magnetic plate 38 shown in FIG.
- This embodiment is the same as the first embodiment in the basic configuration such as the watch case 12 and the positional relationship between the anti-magnetic plate 38 and the antenna 32 and the like. This is different from Example 11 in that the fixing of the anti-magnetic plate 38 is sandwiched between the upper surface of the rising portion 16a of the screw-type back cover 16 and the lower surface of the movement 24. It will be described in detail.
- the anti-magnetic plate 38 is provided with a rising portion 38a that stands upright so as to surround the movement 24.
- a notch 38 c is provided in a part of the rising portion 38 a, and a notch 38 c is fitted in the inner end of the side pipe 44 penetrating the watch case body 14. In this way, the rotation of the anti-magnetic plate 38 is stopped so that the positioning can be easily performed.
- the rising portion 16a of the back cover 16a may also rotate the anti-magnetic plate 38 on the upper surface. Since the side pipe 44 is fitted into 8c, the rotation of the anti-magnetic plate 38 can also be prevented.
- the material of the watch case 12 composed of the watch case body 14, the back cover 16 and the like in each of the above Examples 11 to 15 is stainless steel, plastic, or any other material as long as it is suitable for a radio clock. It may be something.
- the antenna 32 is disposed at the corner of the lower surface of the movement 24 so that the axis of the magnetic core material 34 is oriented in a direction orthogonal to the front and back directions of the watch. are doing.
- the axial ends of the antenna 32 with respect to the inner surface of the back cover 16 of the watch case One end face may be arranged substantially parallel (see Fig. 30 (B)), or the outer face of the antenna 32 may be arranged substantially perpendicular to the inner face of the back cover 16 of the watch case. Then (see FIG. 30 (B)), it is also possible to arrange the antenna 32 so as to be in an upright state (vertically).
- the inner surface of the watch case body 14 of the watch case and the outer surface of the antenna 32 ie, the outer surface in the short side direction of the antenna
- the antenna 32 it is also possible to arrange the antenna 32 so that it stands upright (vertically) (see Fig. 30 (A)). It is.
- one end surface of both ends in the axial direction of the antenna 32 may be disposed substantially perpendicular to the inner surface of the back cover 16 of the watch case (see FIG. 30 (D)).
- the antenna 32 is laid horizontally. It is also possible to arrange so that
- the inner surface of the back case 16 of the watch case and the outer surface of the antenna 32 are formed.
- the antennas 32 are also possible to arrange the antennas 32 so that they lie horizontally in the horizontal direction.
- the opening 38b of the anti-magnetic plate 38 may be formed so as to face the entire shape of the antenna 32, as in the above-described embodiments 11 to 15, or the antenna may be formed.
- the antenna may be formed at the rising portion 38 a so as to face the end of the corner 32.
- the material used for the anti-magnetic plate 38 and the non-magnetic members 40 and 42 is not limited to using only one kind, and it is also possible to use a combination of a plurality of metals and non-magnetic members.
- non-magnetic member made of the materials to be used and an experimental antenna were installed in an experimental case, and were installed at predetermined positions.
- An experiment was conducted in which a signal was transmitted from the transmitting antenna (see the experiment of Example 1).
- the non-magnetic members 40 and 42 are formed of a material such as gold, silver, copper, brass, aluminum, magnesium, zinc, or an alloy thereof, the use of the anti-magnetic plate 38 will not be possible. It has also been found that the receiver sensitivity can be improved.
- the timepiece display accuracy can be improved because the timepiece device can be protected from external magnetism by providing the anti-magnetic plate.
- the aperture and the non-magnetic member are provided in the magnetic-resistant plate, so that it is possible to significantly reduce the deterioration of the radio wave receiving performance of time information and the like, thereby affecting the performance of the radio watch.
- a magnetic-resistant structure can be realized without providing.
- a watch having a clock case such as a ring, a radio watch, not only a radio watch, but also a wall clock, a table clock, an alarm clock, and the like.
- the watch by providing a non-magnetic member having an electric resistivity of 7.0 ⁇ -Cm or less in a watch case containing an antenna and a watch device, the watch is caused by a metal material. Disturbance of resonance phenomenon near the antenna can be reduced Therefore, sufficient reception sensitivity can be obtained even with a metal watch case.
- a nonmagnetic member set to 7.0 IX ⁇ _Cm or less is used as a nonmagnetic member fixed to the watch case, for example, the body of the watch case or the inner surface of the back cover.
- a metal with low reception sensitivity, low frequency selectivity and high electrical resistivity such as titanium, titanium alloy, stainless steel, tantalum bite, etc.
- the watch case body and back cover can be used without sacrificing the receiving sensitivity, and the mechanical and external functions of the watch case can be improved.
- a part of the watch case for example, a part of the watch case body, the back cover, the bezel, or at least one of them has an electric resistivity of 7.0 ⁇ -Cm or less. Since it is formed of a non-magnetic member set as described above, the non-magnetic member can reduce the disturbance of the resonance phenomenon near the antenna due to the metal material. It is possible to obtain a high reception sensitivity.
- a part of the watch case for example, a part of the watch case body, case back, bezel, or at least one of them can be reduced to 7. ⁇ -Cm or less.
- the set non-magnetic material is a metal with low reception sensitivity, low frequency selectivity, and high electrical resistivity, such as titanium, titanium alloy, stainless steel, and tantalum carbide.
- the excellent metal can be used as the watch case other than the watch case made of non-magnetic material without sacrificing the receiving sensitivity. Can be improved.
- the surface of the watch case made of such non-magnetic material has a surface finish.
- the watch case has a high-grade metallic color, etc., and a high appearance quality, such as a watch case body, case back, base, etc.
- the timepiece can be designed and manufactured in the same way as a general watch that is not a radio controlled watch, and the design variations of the case of a radio controlled watch can be expanded to the same level as a general watch.
- the watch case is made of metal, and the distance between the antenna and the watch case, that is, the body thickness T 1 of the watch case body of the watch case, the back cover thickness T 2 of the watch case back cover,
- the distance between the antenna and the watch case that is, the body thickness T 1 of the watch case body of the watch case, the back cover thickness T 2 of the watch case back cover
- the anti-magnetic plate disposed in the watch case has an opening at a portion facing the antenna, the antenna transmits radio waves without being affected by the anti-magnetic plate through this opening. Since the timepiece can be received, the timepiece device can be protected from external magnetism even in a radio timepiece without deteriorating the radio wave reception performance, and there is no effect on the driving of the hands and the accuracy of the timepiece can be improved.
- the watch case that houses the antenna is made of a material that is electrically non-conductive or has low electrical resistivity, and is made of an exterior member attached to the outside of the watch case.
- the exterior member covering the surface is electrically conductive such as a metal.
- the distance between the antenna and the electrically conductive exterior member can be increased as compared with the case where the watch case itself housing the antenna is made of a conductive material, so that the reception failure of the antenna is less likely to occur.
- the antenna can satisfactorily receive radio waves, and it is possible to improve reception performance and clock accuracy.
- a conductive exterior member such as a metal gives the radio-controlled timepiece a metallic appearance.
- This allows the watch case to be visually perceived as a solid metal, so that while using a non-conductive material such as synthetic resin for the watch case, there are many remarkable and unique features such as not losing luxury and aesthetics. This is an extremely excellent invention having an operational effect.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Electric Clocks (AREA)
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03768329A EP1577719B1 (en) | 2002-12-27 | 2003-12-26 | Radio-controlled clock/watch |
KR1020047021078A KR100752238B1 (ko) | 2002-12-27 | 2003-12-26 | 전파 시계 |
DE60335025T DE60335025D1 (de) | 2002-12-27 | 2003-12-26 | Per funkgesteuerte uhr/armbanduhr |
US10/519,237 US20060126438A1 (en) | 2002-12-27 | 2003-12-26 | Radio-controlled clock/watch |
HK06101787.9A HK1081673A1 (en) | 2002-12-27 | 2006-02-10 | Radio-controlled clock/watch |
Applications Claiming Priority (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002379043A JP2004212083A (ja) | 2002-12-27 | 2002-12-27 | 電波時計のケース構造 |
JP2002-379043 | 2002-12-27 | ||
JP2003-041352 | 2003-02-19 | ||
JP2003041352A JP4463485B2 (ja) | 2003-02-19 | 2003-02-19 | 電波時計 |
JP2003-044185 | 2003-02-21 | ||
JP2003044185A JP4377140B2 (ja) | 2003-02-21 | 2003-02-21 | 電波時計ケース |
JP2003-086837 | 2003-03-27 | ||
JP2003086837A JP4294986B2 (ja) | 2003-03-27 | 2003-03-27 | 電波時計 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004070479A1 true WO2004070479A1 (ja) | 2004-08-19 |
Family
ID=32854411
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/016970 WO2004070479A1 (ja) | 2002-12-27 | 2003-12-26 | 電波時計 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20060126438A1 (ja) |
EP (1) | EP1577719B1 (ja) |
KR (1) | KR100752238B1 (ja) |
DE (1) | DE60335025D1 (ja) |
HK (1) | HK1081673A1 (ja) |
WO (1) | WO2004070479A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1793450A1 (en) * | 2004-08-25 | 2007-06-06 | Citizen Watch Co., Ltd. | Electronic device |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20060129787A (ko) * | 2005-06-13 | 2006-12-18 | 삼성전자주식회사 | 액정표시장치 |
JP4964883B2 (ja) * | 2006-07-13 | 2012-07-04 | シチズンホールディングス株式会社 | 無線機能付き時計 |
JP4595901B2 (ja) * | 2006-07-27 | 2010-12-08 | カシオ計算機株式会社 | 機器ケース、腕時計ケースおよび電波時計 |
US8366313B2 (en) * | 2009-08-04 | 2013-02-05 | Daniel Scioscia | Wrist mounted watchcase having separable main body and surrounding protective frame and wristwatch incorporating same |
JP2011097431A (ja) * | 2009-10-30 | 2011-05-12 | Seiko Epson Corp | 腕装着型電子機器 |
JP5327018B2 (ja) * | 2009-11-25 | 2013-10-30 | セイコーエプソン株式会社 | 装飾品の製造方法、装飾品および時計 |
EP2565733A3 (en) * | 2011-08-31 | 2013-12-04 | Seiko Epson Corporation | Timepiece |
US8693722B2 (en) * | 2012-06-27 | 2014-04-08 | Ozaki International Co. Ltd. | Magnetic sound box device |
TW201407305A (zh) * | 2012-08-03 | 2014-02-16 | New Timer Internat Co Ltd | 錶殼之改良結構 |
EP2728422A1 (fr) * | 2012-11-06 | 2014-05-07 | The Swatch Group Research and Development Ltd. | Composant d'habillage d'horlogerie bi-métal soudé |
US10033092B2 (en) * | 2015-07-22 | 2018-07-24 | Futurewei Technologies, Inc. | Apparatus and method for utilizing a component with a helical antenna for communicating RF signals |
US10615489B2 (en) * | 2016-06-08 | 2020-04-07 | Futurewei Technologies, Inc. | Wearable article apparatus and method with multiple antennas |
EP3273313A1 (fr) * | 2016-07-19 | 2018-01-24 | The Swatch Group Research and Development Ltd. | Élément d'habillage d'aspect métallique à système de communication intégré |
JP6520970B2 (ja) * | 2017-02-27 | 2019-05-29 | カシオ計算機株式会社 | 電子機器及び時計 |
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-
2003
- 2003-12-26 EP EP03768329A patent/EP1577719B1/en not_active Expired - Lifetime
- 2003-12-26 WO PCT/JP2003/016970 patent/WO2004070479A1/ja not_active Application Discontinuation
- 2003-12-26 KR KR1020047021078A patent/KR100752238B1/ko active IP Right Grant
- 2003-12-26 DE DE60335025T patent/DE60335025D1/de not_active Expired - Lifetime
- 2003-12-26 US US10/519,237 patent/US20060126438A1/en not_active Abandoned
-
2006
- 2006-02-10 HK HK06101787.9A patent/HK1081673A1/xx not_active IP Right Cessation
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JPH10197662A (ja) * | 1996-12-28 | 1998-07-31 | Casio Comput Co Ltd | 受信装置 |
JP2001033571A (ja) | 1999-06-09 | 2001-02-09 | Junghans Uhren Gmbh | 無線制御式の腕時計 |
JP2001208875A (ja) * | 2000-01-31 | 2001-08-03 | Mitsubishi Materials Corp | 腕時計の識別用タグ及びこれを内蔵した腕時計 |
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JP2002294376A (ja) * | 2001-03-29 | 2002-10-09 | Showa Denko Kk | アルミニウム−異種金属クラッド材およびその製造方法 |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1793450A1 (en) * | 2004-08-25 | 2007-06-06 | Citizen Watch Co., Ltd. | Electronic device |
EP1793450A4 (en) * | 2004-08-25 | 2010-12-22 | Citizen Holdings Co Ltd | ELECTRONIC DEVICE |
CN1961457B (zh) * | 2004-08-25 | 2012-10-17 | 西铁城控股株式会社 | 电子装置 |
Also Published As
Publication number | Publication date |
---|---|
KR20050013242A (ko) | 2005-02-03 |
EP1577719A4 (en) | 2007-12-05 |
HK1081673A1 (en) | 2006-05-19 |
US20060126438A1 (en) | 2006-06-15 |
KR100752238B1 (ko) | 2007-08-27 |
EP1577719B1 (en) | 2010-11-17 |
DE60335025D1 (de) | 2010-12-30 |
EP1577719A1 (en) | 2005-09-21 |
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