JP2019066401A

JP2019066401A - Antenna device and watch

Info

Publication number: JP2019066401A
Application number: JP2017194004A
Authority: JP
Inventors: 大輔植松; daisuke Uematsu; 佐野　貴司; Takashi Sano; 貴司佐野; 洋平川口; Yohei Kawaguchi; 龍美市村; Tatsumi Ichimura; 巧安田; Takumi Yasuda
Original assignee: Casio Computer Co Ltd
Current assignee: Casio Computer Co Ltd
Priority date: 2017-10-04
Filing date: 2017-10-04
Publication date: 2019-04-25
Anticipated expiration: 2037-10-04
Also published as: JP7054434B2

Abstract

【課題】アンテナ特性を安定させることができるアンテナ装置およびそれを備えた時計を提供する。【解決手段】合成樹脂製のケース本体８と、このケース本体８の上部に設けられ、電波を受信する金属製の外装アンテナ部材９と、この外装アンテナ部材９の近傍に設けられたスイッチ釦５と、を備え、外装アンテナ部材９とスイッチ釦５の金属製の筒状部材１４との間隔を、容量結合が弱くなる長さに設定した。従って、スイッチ釦５の金属製の筒状部材１４が外装アンテナ部材９に接近して設けられていても、外装アンテナ部材９と筒状部材１４との間隔を、容量結合が弱くなる長さに設定していることにより、外装アンテナ部材９と金属製の筒状部材１４との間隔のバラツキによって発生するアンテナ効率のバラツキを軽減して、アンテナ特性を安定させることができる。【選択図】図２PROBLEM TO BE SOLVED: To provide an antenna device capable of stabilizing antenna characteristics and a clock equipped with the antenna device. SOLUTION: A case body 8 made of synthetic resin, a metal exterior antenna member 9 provided on the upper part of the case body 8 and receiving radio waves, and a switch button 5 provided in the vicinity of the exterior antenna member 9. The distance between the exterior antenna member 9 and the metal tubular member 14 of the switch button 5 is set to a length at which the capacitive coupling is weakened. Therefore, even if the metal tubular member 14 of the switch button 5 is provided close to the exterior antenna member 9, the distance between the exterior antenna member 9 and the tubular member 14 is set to a length that weakens the capacitive coupling. By setting, the variation in antenna efficiency caused by the variation in the distance between the exterior antenna member 9 and the metal tubular member 14 can be reduced, and the antenna characteristics can be stabilized. [Selection diagram] Fig. 2

Description

この発明は、腕時計などの電子機器に用いられるアンテナ装置およびそれを備えた時計に関する。 The present invention relates to an antenna device used for an electronic device such as a watch and a watch provided with the same.

例えば、腕時計においては、特許文献１に記載されているように、合成樹脂製のケース本体の上部に合成樹脂製の外装部材を設け、ケース本体の内部にアンテナを設けた構造のものが知られている。 For example, in a wristwatch, as described in Patent Document 1, there is known a structure in which a synthetic resin exterior member is provided on the upper portion of a synthetic resin case body and an antenna is provided inside the case body. ing.

特開２０１５−１８４０９０号公報JP, 2015-184090, A

このような腕時計では、ケース本体の上部開口部に時計ガラスが嵌め込まれた際のケース本体の変形を抑えるために、金属製の補強部材をグランド電位と非導通状態でケース本体に埋め込んで、アンテナが電波を受信する際に、アンテナの電波受信に対する補強部材による影響を軽減しているが、電波受信に対する補強部材による影響を完全に払拭することができない。 In such a watch, in order to suppress deformation of the case body when the watch glass is fitted into the upper opening of the case body, a metal reinforcing member is embedded in the case body in a nonconductive state with the ground potential, and the antenna is When the radio wave is received, the influence of the reinforcing member on the radio wave reception of the antenna is reduced, but the influence of the reinforcing member on the radio wave reception can not be completely wiped out.

そこで、このような腕時計においては、合成樹脂製のケース本体の上部に電波を受信する金属製の外装アンテナ部材を設けたものが開発されている。 Therefore, in such a wristwatch, there has been developed a wristwatch provided with a metal external antenna member for receiving radio waves on the upper portion of a synthetic resin case body.

しかしながら、このような腕時計では、ケース本体に金属部品を備えたスイッチ釦が外装アンテナ部材に接近して配置されている場合、電波を受信する金属製の外装アンテナ部材とスイッチ釦の金属部品との間隔がアンテナ特性に影響するという問題がある。 However, in such a wristwatch, when the switch button provided with the metal part in the case main body is disposed close to the external antenna member, the metal external antenna member for receiving radio waves and the metal part of the switch button There is a problem that the spacing affects the antenna characteristics.

この発明が解決しようとする課題は、アンテナ特性を安定させることができるアンテナ装置およびそれを備えた時計を提供することである。 The problem to be solved by the present invention is to provide an antenna device capable of stabilizing antenna characteristics and a timepiece provided with the same.

この発明は、合成樹脂製のケース本体と、前記ケース本体の上部に設けられ、電波を受信する金属製の外装アンテナ部材と、前記外装アンテナ部材の近傍に設けられた金属部品と、を備え、前記外装アンテナ部材と前記金属部品との間隔を、容量結合が弱くなる長さに設定したことを特徴とするアンテナ装置である。 The present invention comprises a case body made of synthetic resin, a metal outer antenna member provided on the upper portion of the case main body for receiving radio waves, and a metal component provided in the vicinity of the outer antenna member. In the antenna device, the distance between the external antenna member and the metal part is set to a length at which capacitive coupling is weakened.

この発明によれば、アンテナ特性を安定させることができる。 According to the present invention, antenna characteristics can be stabilized.

この発明を腕時計に適用した一実施形態を示した拡大正面図である。It is an enlarged front view showing one embodiment which applied this invention to a wristwatch. 図１に示された腕時計のＡ−Ａ矢視における要部を示した拡大断面図である。It is the expanded sectional view which showed the principal part in the AA arrow of the wristwatch shown by FIG.

以下、図１および図２を参照して、この発明を腕時計に適用した一実施形態について説明する。
この腕時計は、図１および図２に示すように、腕時計ケース１を備えている。この腕時計ケース１の上部開口部には、時計ガラス２がガラスパッキン２ａを介して設けられている。この腕時計ケース１の下部には、裏蓋３が防水パッキン３ａを介して取り付けられている。 Hereinafter, an embodiment in which the present invention is applied to a watch will be described with reference to FIGS. 1 and 2.
This watch is provided with a watch case 1 as shown in FIG. 1 and FIG. At the upper opening of the watch case 1, a watch glass 2 is provided via a glass packing 2a. A back cover 3 is attached to the lower part of the watch case 1 via a waterproof packing 3a.

この腕時計ケース１の１２時側と６時側との各側部には、図１に示すように、時計バンド（図示せず）が取り付けられるバンド取付部４が設けられている。また、この腕時計ケース１の３時側の側部には、スイッチ釦５が設けられている。この腕時計ケース１の内部には、図２に示すように、時計モジュール６が設けられている。 As shown in FIG. 1, a band attachment portion 4 to which a watch band (not shown) is attached is provided on each of the 12 o'clock and 6 o'clock sides of the watch case 1. A switch button 5 is provided on the 3 o'clock side of the watch case 1. As shown in FIG. 2, a watch module 6 is provided inside the watch case 1.

この時計モジュール６は、指針を運針させて時刻を指示する時計ムーブメント、時刻などの情報を電気光学的に表示する表示部（いずれも図示せず）、これらを電気的に制御して駆動するための回路基板７（図２参照）などの時計機能に必要な各種の電子部品を備えている。 The watch module 6 moves the hands and displays a watch movement indicating the time, a display unit (not shown) displaying information such as the time electro-optically, and electrically controlling and driving these. The circuit board 7 (see FIG. 2) is provided with various electronic components necessary for the watch function.

ところで、腕時計ケース１は、図２に示すように、硬質の合成樹脂製のケース本体８と、電波を受信する金属製の外装アンテナ部材９と、を備えている。ケース本体８は、ほぼ円形のリング状に形成されている。このケース本体８の側部には、スイッチ釦５が設けられている。また、このケース本体８の内部には、時計モジュール６が設けられている。 By the way, as shown in FIG. 2, the wristwatch case 1 is provided with a case body 8 made of hard synthetic resin, and an external antenna member 9 made of metal for receiving radio waves. The case body 8 is formed in a substantially circular ring shape. A switch button 5 is provided on the side of the case body 8. Further, a watch module 6 is provided inside the case body 8.

外装アンテナ部材９は、高周波（例えば１５７５．４２ＭＨｚ）の電波を受信するＧＰＳ用のアンテナであり、図１および図２に示すように、ケース本体８とほぼ同じ形状のリング状に形成され、時計のベゼルとしても機能し、ケース本体８の上部に防水リング８ａを介して複数のねじ９ａによって取り付けられている。この外装アンテナ部材９の内部には、時計ガラス２がガラスパッキン２ａを介して取り付けている。 The exterior antenna member 9 is a GPS antenna for receiving radio waves of high frequency (for example, 1575.42 MHz), and as shown in FIGS. 1 and 2, is formed in a ring shape having substantially the same shape as the case main body 8 , And is attached to the upper portion of the case main body 8 by a plurality of screws 9a via a waterproof ring 8a. The watch glass 2 is attached to the inside of the exterior antenna member 9 through the glass packing 2 a.

この外装アンテナ部材９は、図１および図２に示すように、時計モジュール６の回路基板７に搭載された受信回路部１１と端子等により電気的に接続されている。これにより、外装アンテナ部材９と回路基板７の受信回路部１１とによって、アンテナ装置が構成されている。 As shown in FIGS. 1 and 2, the external antenna member 9 is electrically connected to the receiving circuit unit 11 mounted on the circuit board 7 of the timepiece module 6 by a terminal or the like. Thus, the antenna device is configured by the external antenna member 9 and the receiving circuit unit 11 of the circuit board 7.

一方、スイッチ釦５は、図２に示すように、操作軸１２と釦部１３とを備え、これらが金属によって一体に形成されて、ケース本体８の貫通孔１０に嵌め込まれた金属製の筒状部材１４内に配置されている。筒状部材１４は、ケース本体８の貫通孔１０の小径孔部１０ａに嵌め込まれる小径部１４ａと、貫通孔１０の大径孔部１０ｂに嵌め込まれる中径部１４ｂと、ケース本体８の外部に突出して配置される大径部１４ｃと、を備えている。 On the other hand, as shown in FIG. 2, the switch button 5 includes the operation shaft 12 and the button portion 13, which are integrally formed of metal and made of metal and fitted in the through hole 10 of the case main body 8. It is disposed within the bar-like member 14. The cylindrical member 14 has a small diameter portion 14 a fitted in the small diameter hole portion 10 a of the through hole 10 of the case main body 8, an intermediate diameter portion 14 b fitted in the large diameter hole portion 10 b of the through hole 10, and the outside of the case main body 8 And a large diameter portion 14c disposed to protrude.

この筒状部材１４の小径部１４ａは、図２に示すように、外径が貫通孔１０の小径孔部１０ａの内径と同じ大きさで、軸方向の長さがケース本体８の貫通孔１０の軸方向の長さのほぼ半分の長さに形成されている。中径部１４ｂは、その外径が貫通孔１０の大径孔部１０ｂの内径と同じ大きさで、内径が小径部１４ａの内径と同じ大きさに形成されている。 As shown in FIG. 2, the small diameter portion 14 a of the cylindrical member 14 has the same outer diameter as the inner diameter of the small diameter hole portion 10 a of the through hole 10, and the axial length is the through hole 10 of the case main body 8. It is formed in about half the length of the axial length of. The inside diameter of the medium diameter portion 14b is the same as the inside diameter of the large diameter hole 10b of the through hole 10, and the inside diameter is the same as the inside diameter of the small diameter portion 14a.

また、この中径部１４ｂは、図２に示すように、軸方向の長さがケース本体８の貫通孔１０の軸方向の長さよりも短く、かつ貫通孔１０の軸方向の長さのほぼ半分の長さよりも長く形成されている。このため、小径部１４ａは、ケース本体８の貫通孔１０に中径部１４ｂと共に嵌め込まれて大径部１４ｃがケース本体８の外面に当接した際に、内端部がケース本体８内に突出するように構成されている。 Further, as shown in FIG. 2, the middle diameter portion 14 b has an axial length shorter than the axial length of the through hole 10 of the case main body 8 and substantially the axial length of the through hole 10. It is formed longer than a half length. Therefore, when the small diameter portion 14a is inserted into the through hole 10 of the case main body 8 together with the middle diameter portion 14b and the large diameter portion 14c abuts on the outer surface of the case main body 8, the inner end is inserted into the case main body 8. It is configured to protrude.

この場合、この小径部１４ａは、図２に示すように、ケース本体８内に突出した内端部にＥリングなどの第１抜止め部１５が取り付けられている。この第１抜止め部１５は、ケース本体８の内面に当接して筒状部材１４がケース本体８の外部に抜け出さないように構成されている。 In this case, as shown in FIG. 2, the small diameter portion 14 a has a first retaining portion 15 such as an E-ring attached to the inner end projecting into the case body 8. The first retaining portion 15 abuts against the inner surface of the case main body 8 so that the tubular member 14 does not come out of the case main body 8.

また、この中径部１４ｂの外周面には、図２に示すように、複数の第１防水リング１６が取り付けられている。これら複数の第１防水リング１６は、その各外周部がケース本体８の貫通孔１０の内周面に圧接することにより、中径部１４ｂの外周面と貫通孔１０の内周面との間の防水を図っている。 Further, as shown in FIG. 2, a plurality of first waterproof rings 16 are attached to the outer peripheral surface of the middle diameter portion 14b. Between the outer peripheral surface of the medium diameter portion 14 b and the inner peripheral surface of the through hole 10, the outer peripheral portions of the plurality of first waterproof rings 16 are in pressure contact with the inner peripheral surface of the through hole 10 of the case main body 8. It is trying to be waterproof.

大径部１４ｃは、図２に示すように、外径がケース本体８の上下方向の長さとほぼ同じ大きさで、外周部の上部が外装アンテナ部材９に設けられた後述する食込み部２０に食い込んだ状態で配置されている。また、この大径部１４ｃは、軸方向の長さがケース本体８の貫通孔１０の軸方向の長さとほぼ同じ長さに形成されている。 As shown in FIG. 2, the large diameter portion 14 c has an outer diameter that is substantially the same as the length of the case main body 8 in the vertical direction, and the upper portion of the outer peripheral portion It is arranged in a state of biting. Further, the large diameter portion 14 c is formed such that its axial length is substantially the same as the axial length of the through hole 10 of the case main body 8.

一方、操作軸１２は、図２に示すように、筒状部材１４内にスライド可能に配置されている。この操作軸１２は、外径が筒状部材１４の小径部１４ａの内径と同じ大きさで、軸方向の長さが筒状部材１４の軸方向の長さよりも長く形成されている。この場合、操作軸１２は、内端部がケース本体８内に突出し、この突出した内端部に第２抜止め部１７が取り付けられ、この第２抜止め部１７が筒状部材１４の小径部１４ａの内端部に当接して筒状部材１４から抜け出さないように構成されている。 On the other hand, the operation shaft 12 is slidably disposed in the cylindrical member 14 as shown in FIG. The operation shaft 12 has the same outer diameter as the inner diameter of the small diameter portion 14 a of the tubular member 14, and the axial length is longer than the axial length of the tubular member 14. In this case, the inner end of the operation shaft 12 protrudes into the case body 8, the second retaining portion 17 is attached to the projecting inner end, and the second retaining portion 17 has a small diameter of the cylindrical member 14. It abuts on the inner end portion of the portion 14 a so as not to come out of the cylindrical member 14.

また、この操作軸１２の外周には、図２に示すように、複数の第２防水リング１８が取り付けられている。これら複数の第２防水リング１８は、その各外周部が筒状部材１４の小径部１４ａと中径部１４ｂとの各内周面に摺動可能な状態で圧接することにより、小径部１４ａと中径部１４ｂの内周面と操作軸１２の外周面との間の防水を図っている。 Further, as shown in FIG. 2, a plurality of second waterproof rings 18 are attached to the outer periphery of the operation shaft 12. The plurality of second waterproof rings 18 are press-contacted in a state where their respective outer peripheral portions can slide on the respective inner peripheral surfaces of the small diameter portion 14 a and the medium diameter portion 14 b of the cylindrical member 14. Water resistance is achieved between the inner peripheral surface of the middle diameter portion 14 b and the outer peripheral surface of the operation shaft 12.

釦部１３は、図２に示すように、操作軸１２の外端部に一体に設けられて、筒状部材１４の大径部１４ｃ内にスライド可能に配置されている。この釦部１３は、その外径が大径部１４ｃの内径とほぼ同じ大きさで、軸方向の長さが大径部１４ｃの軸方向の長さとほぼ同じ長さに形成されている。 As shown in FIG. 2, the button portion 13 is integrally provided at the outer end of the operation shaft 12 and slidably disposed in the large diameter portion 14 c of the cylindrical member 14. The button portion 13 has an outer diameter substantially the same as the inner diameter of the large diameter portion 14c and an axial length substantially the same as the axial length of the large diameter portion 14c.

この場合、釦部１３の内部には、図２に示すように、円筒部１３ａが操作軸１２と同心円状に設けられている。この円筒部１３ａは、外径が筒状部材１４の中径部１４ｂの外径ほぼ同じ大きさで、内径が小径部１４ａの外径とほぼ同じ大きさに形成されている。 In this case, as shown in FIG. 2, a cylindrical portion 13 a is provided concentrically with the operation shaft 12 inside the button portion 13. The cylindrical portion 13a has an outer diameter substantially the same as the outer diameter of the middle diameter portion 14b of the cylindrical member 14, and an inner diameter substantially the same as the outer diameter of the small diameter portion 14a.

また、操作軸１２の外周には、図２に示すように、コイルばね１９が配置されている。このコイルばね１９は、釦部１３をケース本体８の外部に向けて押し出す方向に付勢するものであり、内端部が中径部１４ｂの外端部に弾接し、外端部が円筒部１３ａの内端部に弾接し、この状態で釦部１３をケース本体８の外部に向けて押し出すように構成されている。 In addition, as shown in FIG. 2, a coil spring 19 is disposed on the outer periphery of the operation shaft 12. The coil spring 19 urges the button 13 in the direction of pushing the button 13 out of the case body 8. The inner end elastically contacts the outer end of the middle diameter portion 14b, and the outer end is a cylindrical portion. It resiliently contacts the inner end of the case 13a, and in this state, the button portion 13 is configured to be pushed out of the case body 8.

これにより、スイッチ釦５は、図２に示すように、通常の状態のときに、コイルばね１９のばね力によって釦部１３が操作軸１２と共にケース本体８の外部に押し出され、操作軸１２の内端部に取り付けられた第２抜止め部１７が筒状部材１４の小径部１４ａの内端部に当接するように構成されている。この状態では、操作軸１２は、内端部が時計モジュール６のスイッチ接点部６ａから離れて、スイッチ接点部６ａをオフ状態にする。 Thereby, as shown in FIG. 2, in the normal state, the button portion 13 is pushed out of the case main body 8 together with the operation shaft 12 by the spring force of the coil spring 19 as shown in FIG. The second retaining portion 17 attached to the inner end portion is configured to abut on the inner end portion of the small diameter portion 14 a of the cylindrical member 14. In this state, the inner end of the operation shaft 12 is separated from the switch contact portion 6 a of the timepiece module 6 to turn off the switch contact portion 6 a.

また、このスイッチ釦５は、図２に示すように、釦部１３がコイルばね１９のばね力に抗して筒状部材１４の大径部１４ｃ内に押し込まれた際に、操作軸１２の第２抜止め部１７が筒状部材１４の小径部１４ａの内端部から離れて、時計モジュール６のスイッチ接点部６ａに押し当てられて、スイッチ接点部６ａをオン動作させるように構成されている。 Further, as shown in FIG. 2, when the button portion 13 is pushed into the large diameter portion 14 c of the cylindrical member 14 against the spring force of the coil spring 19 as shown in FIG. The second retaining portion 17 is configured to be separated from the inner end of the small diameter portion 14a of the cylindrical member 14 and pressed against the switch contact portion 6a of the timepiece module 6 to turn on the switch contact portion 6a. There is.

ところで、金属製の外装アンテナ部材９の外周における下部には、図２に示すように、金属製の筒状部材１４における大径部１４ｃの上部が食い込む食込み部２０が設けられている。この食込み部２０は、大径部１４ｃとの間に隙間を持って、大径部１４ｃの上部が配置される切欠き部である。 By the way, as shown in FIG. 2, a biting portion 20 in which the upper portion of the large diameter portion 14 c of the cylindrical member 14 made of metal bites is provided at the lower part of the outer periphery of the metal external antenna member 9. The biting portion 20 is a cutout portion in which the upper portion of the large diameter portion 14 c is disposed with a gap between the large diameter portion 14 c and the large diameter portion 14 c.

この食込み部２０は、図２に示すように、ケース本体８側に位置する大径部１４ｃの上部における内端面に対面する内面２０ａと、大径部１４ｃの外周面に対面する上面２０ｂと、を備えている。この食込み部２０における金属製の外装アンテナ部材９と金属製の筒状部材１４との間隔は、容量結合が弱くなる長さに設定されている。 As shown in FIG. 2, the biting portion 20 has an inner surface 20a facing the inner end face of the upper portion of the large diameter portion 14c located on the case main body 8 side, and an upper surface 20b facing the outer peripheral surface of the large diameter portion 14c. Is equipped. The distance between the metal external antenna member 9 and the metal cylindrical member 14 in the biting portion 20 is set to a length at which the capacitive coupling becomes weak.

この場合、容量結合の容量は、面積に比例し、距離に反比例する。また、結合インピーダンスは、容量に反比例し、かつ周波数にも反比例する。このため、食込み部２０における金属製の外装アンテナ部材９と金属製の筒状部材１４との間隔は、その間隔に応じて発生する高周波の共振周波数における変化量が小さいときの長さ、つまり共振周波数の変化量が小さく安定しているときの長さを基準値として、設定されている。 In this case, the capacitance of capacitive coupling is proportional to the area and inversely proportional to the distance. Also, the coupling impedance is inversely proportional to the capacitance and also inversely proportional to the frequency. For this reason, the distance between the metal external antenna member 9 and the metal cylindrical member 14 in the biting portion 20 is a length when the amount of change in the resonance frequency of the high frequency generated according to the distance is small, that is, resonance The length when the amount of change in frequency is small and stable is set as a reference value.

つまり、外装アンテナ部材９金属製の筒状部材１４との間隔に応じて発生する高周波の共振周波数は、外装アンテナ部材９と筒状部材１４との間隔が狭いと、共振周波数の変化量が大きく、外装アンテナ部材９と筒状部材１４との間隔が広くなるに従って次第に共振周波数の変化量が小さくなり、外装アンテナ部材９と筒状部材１４との間隔が０．５ｍｍ〜０．７ｍｍの範囲のときに、変化量が小さく安定する特性がある。 That is, the resonance frequency of the high frequency generated according to the distance between the external antenna member 9 and the metal cylindrical member 14 is large when the distance between the external antenna member 9 and the cylindrical member 14 is narrow. As the distance between the external antenna member 9 and the cylindrical member 14 increases, the amount of change in resonance frequency gradually decreases, and the distance between the external antenna member 9 and the cylindrical member 14 is in the range of 0.5 mm to 0.7 mm. Sometimes, the amount of change is small and stable.

このため、外装アンテナ部材９と筒状部材１４との間隔は、その間隔に応じて発生する共振周波数の変化量が小さいときの長さ、つまり共振周波数の変化量が安定しているときの長さ、例えば０．５ｍｍ〜０．７ｍｍの範囲の長さであることが望ましい。また、外装アンテナ部材９と筒状部材１４との間隔は、共振周波数の変化量が小さく安定しているときの長さを基準値として、その基準値の長さに対して所定の振れ幅を持った長さに設定されている。 Therefore, the distance between external antenna member 9 and cylindrical member 14 is a length when the amount of change in resonance frequency generated according to the distance is small, that is, a length when the amount of change in resonance frequency is stable. For example, it is desirable that the length be in the range of 0.5 mm to 0.7 mm. Further, the distance between the external antenna member 9 and the cylindrical member 14 is a predetermined swing width with respect to the length of the reference value, using the length when the variation of the resonance frequency is small and stable. It is set to have a length.

この場合、ケース本体８に対する外装アンテナ部材９の取付寸法とケース本体８に対する筒状部材１４の取付寸法とには、公差がある。このため、外装アンテナ部材９と筒状部材１４との間隔は、０．５ｍｍ〜０．７ｍｍの範囲の長さを基準値として、所定の振れ幅、つまり寸法公差の振れ幅を持った長さに設定されていることが望ましい。 In this case, there is a tolerance between the mounting dimension of the external antenna member 9 with respect to the case main body 8 and the mounting dimension of the cylindrical member 14 with respect to the case main body 8. For this reason, the distance between the external antenna member 9 and the cylindrical member 14 is a predetermined swing width, that is, a length with a swing width of a dimensional tolerance, with a length in the range of 0.5 mm to 0.7 mm as a reference value. It is desirable to be set to

すなわち、基準値の長さに対して所定の振れ幅を持った長さは、ケース本体８に対する外装アンテナ部材９の取付寸法と、ケース本体８に対する筒状部材１４の取付寸法とにおける両方の寸法公差の範囲が、例えば約±０．３ｍｍの範囲である場合、０．４ｍｍ〜１．０ｍｍの範囲に設定されていることが望ましい。 That is, the length having a predetermined swing width with respect to the length of the reference value is the size of both the mounting dimension of external antenna member 9 to case main body 8 and the mounting dimension of cylindrical member 14 to case main body 8 When the range of tolerance is, for example, in the range of about ± 0.3 mm, it is desirable to be set in the range of 0.4 mm to 1.0 mm.

この場合、スイッチ釦５の操作方向における外装アンテナ部材９とスイッチ釦５の筒状部材１４との間の距離、つまり外装アンテナ部材９の食込み部２０の内面２０ａとこれに対面する大径部１４ｃの内端面との間隔Ｓ１は、図２に示すように、スイッチ釦５の外周方向における外装アンテナ部材９とスイッチ釦５の筒状部材１４との間の距離、つまり外装アンテナ部材９の食込み部２０の内面２０ａとこれに対面する大径部１４ｃの外周面との間隔Ｓ２よりも短く（Ｓ１＜Ｓ２）設定されている。 In this case, the distance between the external antenna member 9 and the cylindrical member 14 of the switch button 5 in the operation direction of the switch button 5, that is, the inner surface 20a of the biting portion 20 of the external antenna member 9 and the large diameter portion 14c facing this As shown in FIG. 2, the distance S1 between the outer end face of the switch button 5 and the cylindrical member 14 of the switch button 5 in the outer peripheral direction of the switch button 5, that is, the bite of the outer antenna member 9 The distance S2 is set shorter than the distance S2 between the inner surface 20a of 20 and the outer peripheral surface of the large diameter portion 14c facing the inner surface 20a (S1 <S2).

次に、このような腕時計の作用について説明する。
この腕時計では、腕時計ケース１が合成樹脂製のケース本体８とこのケース本体８の上部に設けられた金属製の外装アンテナ部材９とで構成されているので、この外装アンテナ部材９によって電波を良好に受信することができる。 Next, the operation of such a watch will be described.
In this wristwatch, since the watch case 1 is composed of the case body 8 made of synthetic resin and the metallic external antenna member 9 provided on the upper portion of the case main body 8, radio waves are satisfactorily transmitted by the external antenna member 9 Can be received.

この場合、ケース本体８の側部には、スイッチ釦５が設けられ、このスイッチ釦５をケース本体８に対して取り付けるための金属製の筒状部材１４が外装アンテナ部材９に接近して設けられていても、外装アンテナ部材９と筒状部材１４との間隔が、容量結合を弱くする長さに設定されていることにより、外装アンテナ部材９と筒状部材１４との間隔のバラツキによって発生するアンテナ効率のバラツキが軽減されて、外装アンテナ部材９のアンテナ特性が安定する。 In this case, a switch button 5 is provided on the side of the case main body 8, and a metal cylindrical member 14 for attaching the switch button 5 to the case main body 8 is provided close to the external antenna member 9 Even if the distance between the external antenna member 9 and the cylindrical member 14 is set to a length that weakens the capacitive coupling, the occurrence of the variation in the distance between the external antenna member 9 and the cylindrical member 14 occurs. Variations in antenna efficiency are reduced, and the antenna characteristics of the exterior antenna member 9 are stabilized.

すなわち、外装アンテナ部材９と筒状部材１４との間隔に応じて発生する高周波の共振周波数は、外装アンテナ部材９と筒状部材１４との間隔が狭いと、共振周波数の変化量が大きく、外装アンテナ部材９と筒状部材１４との間隔が広くなるに従って次第に共振周波数の変化量が小さくなり、外装アンテナ部材９と筒状部材１４との間隔が０．５ｍｍ〜０．７ｍｍの範囲のときに、変化量が小さく安定する特性がある。 That is, when the distance between the external antenna member 9 and the cylindrical member 14 is narrow, the resonant frequency of the high frequency generated according to the distance between the external antenna member 9 and the cylindrical member 14 has a large amount of change in resonance frequency. As the distance between the antenna member 9 and the cylindrical member 14 becomes wider, the amount of change in resonance frequency becomes smaller gradually, and the distance between the external antenna member 9 and the cylindrical member 14 is in the range of 0.5 mm to 0.7 mm. There is a characteristic that the amount of change is small and stable.

このため、金属製の外装アンテナ部材９の食込み部２０とこの食込み部２０に食込む金属製の筒状部材１４との間隔は、その間隔によって発生する共振周波数の変化量が小さく安定しているときの長さを基準値とする範囲で、例えば０．５ｍｍ〜０．７ｍｍの範囲に設定されていることにより、外装アンテナ部材９と筒状部材１４との間隔のバラツキによって発生するアンテナ効率のバラツキが軽減されて、外装アンテナ部材９のアンテナ特性が安定する。 Therefore, the distance between the biting portion 20 of the metal external antenna member 9 and the metal cylindrical member 14 biting into the biting portion 20 is small and stable in the amount of change in resonance frequency generated due to the distance. For example, by setting the length in the range of 0.5 mm to 0.7 mm within the range where the length of time is taken as the reference value, the antenna efficiency generated due to the variation of the distance between the exterior antenna member 9 and the cylindrical member 14 Variation is reduced, and the antenna characteristic of the exterior antenna member 9 is stabilized.

すなわち、金属製の外装アンテナ部材９の食込み部２０とこの食込み部２０に食込む金属製の筒状部材１４との間隔は、その間隔によって発生する共振周波数の変化量が小さく安定化しているときの長さを基準値として設定されていることにより、外装アンテナ部材９のアンテナ効率のバラツキが抑えられ、アンテナ特性が安定する。 That is, when the gap between the biting portion 20 of the metal outer antenna member 9 and the metal cylindrical member 14 biting into the biting portion 20 is small and the amount of change in resonance frequency generated due to the distance is stable. By setting the length of L as a reference value, the variation in the antenna efficiency of the exterior antenna member 9 is suppressed, and the antenna characteristics are stabilized.

このため、外装アンテナ部材９が電波を受信する際には、金属製の外装アンテナ部材９の食込み部２０とこの食込み部２０に食込む金属製の筒状部材１４との間に設けられた間隔にバラツキがあっても、外装アンテナ部材９のアンテナ効率のバラツキが抑えられ、アンテナ特性が安定し、外装アンテナ部材９で電波を良好に受信できる。 For this reason, when the external antenna member 9 receives a radio wave, a distance provided between the biting portion 20 of the metal external antenna member 9 and the metal cylindrical member 14 biting into the biting portion 20 Even when there is a variation in the antenna efficiency of the external antenna member 9, the antenna characteristics are stabilized, and radio waves can be favorably received by the external antenna member 9.

また、金属製の外装アンテナ部材９の食込み部２０とこの食込み部２０に食込む金属製の筒状部材１４との間隔は、基準値の長さに対して所定の振れ幅、例えば約±０．３ｍｍの範囲の振れ幅を持った長さ、例えば０．４ｍｍ〜１．０ｍｍの範囲に設定されていることにより、外装アンテナ部材９と筒状部材１４との間隔のバラツキによって発生するアンテナ効率のバラツキが確実に防げるので、より一層、アンテナ特性が安定する。 Further, the distance between the biting portion 20 of the metal external antenna member 9 and the metal cylindrical member 14 biting into the biting portion 20 is a predetermined swing width, for example, about ± 0 with respect to the length of the reference value. The antenna efficiency generated due to the variation of the distance between the external antenna member 9 and the cylindrical member 14 by setting the length with a swing width in the range of 3 mm, for example, in the range of 0.4 mm to 1.0 mm The antenna characteristics can be further stabilized since the variation of

この場合、外装アンテナ部材９と筒状部材１４とは、ケース本体８に対する外装アンテナ部材９の取付寸法とケース本体８に対する筒状部材１４の取付寸法とに公差があるため、０．５ｍｍ〜０．７ｍｍの範囲の長さを基準値として、所定の振れ幅つまり寸法公差の振れ幅を持った長さに設定されていることにより、外装アンテナ部材９のアンテナ特性が更に安定する。 In this case, the external antenna member 9 and the cylindrical member 14 have a tolerance between the mounting dimension of the external antenna member 9 with respect to the case main body 8 and the mounting dimension of the cylindrical member 14 with respect to the case main body 8 The antenna characteristic of the exterior antenna member 9 is further stabilized by setting the length having a predetermined swing width, that is, the swing width of the dimensional tolerance, with the length in the range of 7 mm as a reference value.

このため、外装アンテナ部材９の食込み部２０とこの食込み部２０に食込む金属製の筒状部材１４との間隔が、寸法公差によって変動しても、外装アンテナ部材９と筒状部材１４との間隔の変動によって発生するアンテナ効率のバラツキが確実に抑えられ、外装アンテナ部材９のアンテナ特性を安定させて、外装アンテナ部材９で電波を良好に受信することができる。 Therefore, even if the distance between the biting portion 20 of the external antenna member 9 and the metal cylindrical member 14 biting into the biting portion 20 fluctuates due to dimensional tolerance, the distance between the external antenna member 9 and the cylindrical member 14 The variation of the antenna efficiency generated due to the variation of the interval can be surely suppressed, the antenna characteristic of the exterior antenna member 9 can be stabilized, and the radio wave can be favorably received by the exterior antenna member 9.

この場合、スイッチ釦５の操作方向における外装アンテナ部材９とスイッチ釦５の筒状部材１４との間の距離が、スイッチ釦５の外周方向における外装アンテナ部材９とスイッチ釦５の筒状部材１４との間の距離よりも短く設定されていることにより、これによっても外装アンテナ部材９のアンテナ効率のバラツキが抑えられて、外装アンテナ部材９のアンテナ特性が安定する。 In this case, the distance between the external antenna member 9 and the cylindrical member 14 of the switch button 5 in the operation direction of the switch button 5 is the cylindrical member 14 of the external antenna member 9 and the switch button 5 in the outer peripheral direction of the switch button 5 By setting the distance shorter than the distance between them, the variation of the antenna efficiency of the external antenna member 9 is suppressed also by this, and the antenna characteristic of the external antenna member 9 is stabilized.

すなわち、外装アンテナ部材９の食込み部２０の内面２０ａとこれに対面する大径部１４ｃの内端面との間隔Ｓ１は、外装アンテナ部材９の食込み部２０の内面２０ａとこれに対面する大径部１４ｃの外周面との間隔Ｓ２よりも短く（Ｓ１＜Ｓ２）設定されていることにより、外装アンテナ部材９のアンテナ効率のバラツキが抑えられて、外装アンテナ部材９のアンテナ特性が安定する。 That is, distance S1 between inner surface 20a of biting portion 20 of external antenna member 9 and the inner end face of large diameter portion 14c facing this is the large diameter portion facing inner surface 20a of biting portion 20 of external antenna member 9 By setting the distance S2 to the outer peripheral surface of 14c shorter (S1 <S2), the variation of the antenna efficiency of the exterior antenna member 9 is suppressed, and the antenna characteristic of the exterior antenna member 9 is stabilized.

このように、この腕時計によれば、合成樹脂製のケース本体８と、このケース本体８の上部に設けられ、電波を受信する金属製の外装アンテナ部材９と、この外装アンテナ部材９の近傍に設けられたスイッチ釦５と、を備え、外装アンテナ部材９とスイッチ釦５の金属製の筒状部材１４との間隔を、容量結合が弱くなる長さに設定したことにより、外装アンテナ部材９のアンテナ特性を安定させることができる。 As described above, according to this wristwatch, the case main body 8 made of synthetic resin, the metal external antenna member 9 provided on the upper part of the case main body 8 for receiving radio waves, and the vicinity of the external antenna member 9 The distance between the external antenna member 9 and the metal cylindrical member 14 of the switch button 5 is set to a length at which the capacitive coupling weakens. Antenna characteristics can be stabilized.

すなわち、この腕時計では、スイッチ釦５の金属製の筒状部材１４が外装アンテナ部材９に接近して設けられていても、外装アンテナ部材９と筒状部材１４との間隔を、容量結合が弱くなる長さに設定されていることにより、外装アンテナ部材９と筒状部材１４との間隔のバラツキによって発生するアンテナ効率のバラツキを軽減することができるので、外装アンテナ部材９のアンテナ特性を安定させることができる。 That is, in this wristwatch, even if the metal cylindrical member 14 of the switch button 5 is provided close to the external antenna member 9, the capacitive coupling weakens the distance between the external antenna member 9 and the cylindrical member 14 By setting the length to a certain length, it is possible to reduce the variation of the antenna efficiency caused by the variation of the distance between the exterior antenna member 9 and the cylindrical member 14, so that the antenna characteristics of the exterior antenna member 9 are stabilized. be able to.

この場合、この腕時計では、外装アンテナ部材９と筒状部材１４との間隔が、その間隔に応じて発生する共振周波数の変化量が小さく安定しているときの長さを基準値として設定されていることにより、外装アンテナ部材９と筒状部材１４との間隔のバラツキによって発生するアンテナ効率のバラツキを良好に軽減することができるので、アンテナ特性を安定させることができる。 In this case, in this wristwatch, the distance between the external antenna member 9 and the cylindrical member 14 is set to the length when the variation of the resonance frequency generated according to the distance is small and stable. Since the variation in the antenna efficiency caused by the variation in the distance between the external antenna member 9 and the tubular member 14 can be favorably reduced by the provision of the antenna, the antenna characteristics can be stabilized.

また、この腕時計では、外装アンテナ部材９と筒状部材１４との間隔に応じて発生する共振周波数の変化量が小さいときの長さを基準値として、この基準値の長さに対して所定の振れ幅を持った長さに設定されていることにより、外装アンテナ部材９と筒状部材１４との間隔のバラツキによって発生するアンテナ効率のバラツキを確実に防ぐことができるので、より一層、アンテナ特性を安定させることができる。 Further, in this wristwatch, the length when the amount of change of the resonance frequency generated according to the distance between the external antenna member 9 and the cylindrical member 14 is small is set as a reference value, and the length is set to a predetermined value. By setting the length to have a swing width, it is possible to reliably prevent the variation of the antenna efficiency caused by the variation of the distance between the external antenna member 9 and the cylindrical member 14, so that the antenna characteristics can be further enhanced. Can be stabilized.

この場合、この腕時計では、外装アンテナ部材９と筒状部材１４との間隔に応じて発生する共振周波数の変化量が小さく安定しているときの長さを基準値として、この基準値の長さに対して更に所定の振れ幅を持った長さが、ケース本体８に対する外装アンテナ部材９とケース本体８に対する筒状部材１４とにおける両方の寸法公差の範囲に設定されていることにより、外装アンテナ部材９と筒状部材１４との間隔が寸法公差によって変動しても、アンテナ特性を安定させることができる。 In this case, in this wristwatch, the length of the reference value is determined using the length when the variation of the resonance frequency generated according to the distance between the external antenna member 9 and the cylindrical member 14 is small and stable. Further, the length with a predetermined swing width is set within the range of the dimensional tolerance of both of the external antenna member 9 with respect to the case main body 8 and the cylindrical member 14 with respect to the case main body 8 Even if the distance between the member 9 and the tubular member 14 changes due to dimensional tolerance, the antenna characteristics can be stabilized.

すなわち、この腕時計では、ケース本体８に対する外装アンテナ部材９の取付寸法とケース本体８に対する筒状部材１４の取付寸法とに公差があり、その寸法公差によって外装アンテナ部材９と筒状部材１４との間隔が変動しても、外装アンテナ部材９のアンテナ効率のバラツキを確実に防ぐことができるので、アンテナ特性を安定させることができ、これにより外装アンテナ部材９で電波を良好に受信することができる。 That is, in this wristwatch, there is a tolerance between the mounting dimension of external antenna member 9 with respect to case main body 8 and the mounting dimension of cylindrical member 14 with respect to case main body 8, and due to the dimensional tolerance, external antenna member 9 and cylindrical member 14 Even if the interval changes, the variation of the antenna efficiency of the exterior antenna member 9 can be reliably prevented, so that the antenna characteristics can be stabilized, whereby radio waves can be favorably received by the exterior antenna member 9 .

さらに、この腕時計では、スイッチ釦５の操作方向における外装アンテナ部材９とスイッチ釦５の筒状部材１４との間の距離が、スイッチ釦５の外周方向における外装アンテナ部材９とスイッチ釦５の筒状部材１４との間の距離よりも短く設定されていることにより、これによってもアンテナ効率のバラツキを抑えて、外装アンテナ部材９のアンテナ特性を安定させることができる。 Furthermore, in this wristwatch, the distance between the external antenna member 9 and the cylindrical member 14 of the switch button 5 in the operation direction of the switch button 5 is the cylinder of the external antenna member 9 and the switch button 5 in the outer peripheral direction of the switch button 5 By setting the distance shorter than the distance between the outer member 14 and the outer member 14, the variation of the antenna efficiency can be suppressed, and the antenna characteristics of the exterior antenna member 9 can be stabilized.

すなわち、この腕時計では、外装アンテナ部材９の食込み部２０の内面２０ａとこれに対面する大径部１４ｃの内端面との間隔Ｓ１が、外装アンテナ部材９の食込み部２０の内面２０ａとこれに対面する大径部１４ｃの外周面との間隔Ｓ２よりも短く（Ｓ１＜Ｓ２）設定されていることにより、アンテナ効率のバラツキを抑えることができるので、外装アンテナ部材９のアンテナ特性を安定させることができる。 That is, in this wristwatch, the space S1 between the inner surface 20a of the biting portion 20 of the exterior antenna member 9 and the inner end face of the large diameter portion 14c facing this faces the inner surface 20a of the biting portion 20 of the exterior antenna member 9 By setting the distance S2 shorter than the outer diameter surface of the large diameter portion 14c (S1 <S2), it is possible to suppress the variation of the antenna efficiency, so that the antenna characteristics of the exterior antenna member 9 can be stabilized. it can.

このため、この腕時計では、スイッチ釦５が取り付けられる金属製の筒状部材１４と外装アンテナ部材９との間隔を確保することにより、筒状部材１４の大径部１４ｃを大きく形成して、スイッチ釦５の釦部１３を大きく形成することができるので、スイッチ釦５の大型化をはかることができる。 For this reason, in this wristwatch, the large diameter portion 14c of the cylindrical member 14 is formed large by securing the distance between the metallic cylindrical member 14 to which the switch button 5 is attached and the external antenna member 9 to make the switch Since the button portion 13 of the button 5 can be formed large, the switch button 5 can be enlarged.

また、この腕時計では、筒状部材１４と外装アンテナ部材９との間隔を確保することにより、ケース本体８を小さく形成して外装アンテナ部材９を小さく形成することができるので、ケース全体の小型化を図ることができる。 Further, in this wristwatch, by securing the space between the cylindrical member 14 and the exterior antenna member 9, the case main body 8 can be formed small and the exterior antenna member 9 can be formed small, so the overall size of the case can be reduced. Can be

なお、上述した実施形態では、腕時計ケース１の３時側の側部にスイッチ釦５を設けた場合について述べたが、この発明は、これに限らず、２時側、４時側、８時側、９時側、１０時側の複数箇所にスイッチ釦５を設けても良い。 In the embodiment described above, the case where the switch button 5 is provided on the 3 o'clock side of the watch case 1 is described, but the present invention is not limited to this, and 2 o'clock, 4 o'clock, 8 o'clock The switch button 5 may be provided at a plurality of locations on the side, 9 o'clock side and 10 o'clock side.

また、上述した実施形態では、ケース本体８の側部に設けられた金属製の筒状部材１４にスイッチ釦５を設けた場合について述べたが、この発明は、これに限らず、例えば筒状部材１４を用いずに、直接、スイッチ釦５の操作軸１２をケース本体８に設けた構成であっても良い。この場合には、外装アンテナ部材９とスイッチ釦５の釦部１３との間隔を上述したような間隔に設定すれば良い。 Moreover, although the case where the switch button 5 was provided in the metal cylindrical member 14 provided in the side part of the case main body 8 was described in embodiment mentioned above, this invention is not limited to this, For example, cylindrical shape The operation shaft 12 of the switch button 5 may be directly provided to the case main body 8 without using the member 14. In this case, the distance between the external antenna member 9 and the button portion 13 of the switch button 5 may be set to the distance as described above.

また、食込み部２０は、金属製の筒状部材１４などの金属部品を削ることで、外装アンテナ部材９との間隔を設定するようにしても良い。 In addition, the biting portion 20 may set the distance to the external antenna member 9 by scraping metal parts such as the metal cylindrical member 14.

また、上述した実施形態では、外装アンテナ部材９は、ケース本体８の上部に露出して設けられているが、外装アンテナ部材９を覆うウレタン等の外装部材をさらに設けても良く、また、外装アンテナ部材９が合成樹脂製のケース本体や合成樹脂製の外装部材にインサート成形され、露出していなくても良い。この場合でも、外装アンテナ部材９と金属部品との間隔を上述したような間隔に設定すれば良い。 In the embodiment described above, although the exterior antenna member 9 is provided exposed at the upper portion of the case main body 8, an exterior member such as urethane covering the exterior antenna member 9 may further be provided, and the exterior The antenna member 9 may be insert-molded in a case body made of synthetic resin or an exterior member made of synthetic resin and may not be exposed. Even in this case, the distance between the external antenna member 9 and the metal part may be set to the distance as described above.

また、上述した実施形態では、腕時計ケース１の側部に金属製の筒状部材１４を備えたスイッチ釦５を設けた場合について述べたが、この発明は、必ずしもスイッチ釦５である必要はなく、例えば圧力センサ、温度センサなどの腕時計ケース１の外部環境を検出するための金属部品を備えたセンサであっても良い。 In the embodiment described above, the case where the switch button 5 provided with the metal cylindrical member 14 is provided on the side of the watch case 1 has been described, but the present invention does not necessarily have to be the switch button 5 For example, it may be a sensor provided with metal parts for detecting the external environment of the watch case 1 such as a pressure sensor, a temperature sensor, and the like.

さらに、上述した実施形態では、腕時計に適用した場合について述べたが、この発明は、必ずしも腕時計である必要はなく、例えばトラベルウオッチ、目覚まし時計、置き時計、掛け時計などの各種の時計に適用することができる。また、この発明は、必ずしも時計である必要はなく、携帯電話機、携帯端末などの各種の電子機器に広く適用することができる。 Furthermore, in the embodiment described above, the case of application to a wristwatch has been described, but the present invention does not necessarily have to be a wristwatch, and may be applied to various watches such as travel watches, alarm clocks, clocks, and clocks. it can. Furthermore, the present invention does not necessarily have to be a watch, and can be widely applied to various electronic devices such as mobile phones and mobile terminals.

以上、この発明の一実施形態について説明したが、この発明は、これに限られるものではなく、特許請求の範囲に記載された発明とその均等の範囲を含むものである。
以下に、本願の特許請求の範囲に記載された発明を付記する。 As mentioned above, although one Embodiment of this invention was described, this invention is not limited to this, The invention described in the claim, and the range of equivalence are included.
The invention described in the claims of the present application is appended below.

（付記）
請求項１に記載の発明は、合成樹脂製のケース本体と、前記ケース本体の上部に設けられ、電波を受信する金属製の外装アンテナ部材と、前記外装アンテナ部材の近傍に設けられた金属部品と、を備え、前記外装アンテナ部材と前記金属部品との間隔を、容量結合が弱くなる長さに設定したことを特徴とするアンテナ装置である。 (Supplementary note)
The invention according to claim 1 comprises a case body made of synthetic resin, a metal external antenna member provided on the upper portion of the case main body for receiving radio waves, and a metal component provided in the vicinity of the external antenna member And an interval between the external antenna member and the metal part is set to a length at which capacitive coupling weakens.

請求項２に記載の発明は、請求項１に記載のアンテナ装置において、前記外装アンテナ部材と前記金属部品との前記間隔は、前記電波の共振周波数の変化量が小さいときの長さを基準値として設定されていることを特徴とするアンテナ装置である。 The invention according to claim 2 is the antenna device according to claim 1, wherein the distance between the external antenna member and the metal component is a reference value when the amount of change in the resonant frequency of the radio wave is small. The antenna apparatus is characterized in that

請求項３に記載の発明は、請求項２に記載のアンテナ装置において、前記外装アンテナ部材と前記金属部品との前記間隔は、前記基準値の長さに対して所定の振れ幅を持った長さに設定されていることを特徴とするアンテナ装置である。 The invention according to claim 3 is the antenna apparatus according to claim 2, wherein the distance between the exterior antenna member and the metal part is a length having a predetermined swing width with respect to the length of the reference value. The antenna device is characterized in that it is set.

請求項４に記載の発明は、請求項３に記載のアンテナ装置において、前記基準値の長さに対して前記所定の振れ幅を持った長さは、前記ケース本体に対する前記外装アンテナ部材と前記ケース本体に対する前記金属部品とにおける両方の寸法公差の範囲に設定されていることを特徴とするアンテナ装置である。 The invention according to claim 4 is the antenna device according to claim 3, wherein the length having the predetermined swing width with respect to the length of the reference value is the external antenna member for the case main body and the length. It is an antenna device characterized by being set within the range of both dimensional tolerances of the metal part with respect to the case main body.

請求項５に記載の発明は、請求項１〜請求項４のいずれかに記載のアンテナ装置において、前記金属部品は、前記ケース本体の側部に設けられて、金属部を備えたスイッチ釦であることを特徴とするアンテナ装置である。 The invention according to claim 5 is the antenna device according to any one of claims 1 to 4, wherein the metal component is a switch button provided on the side of the case main body and provided with a metal portion. It is an antenna device characterized by a certain thing.

請求項６に記載の発明は、請求項５に記載のアンテナ装置において、前記スイッチ釦の操作方向における前記外装アンテナ部材と前記スイッチ釦の前記金属部との間の距離は、前記スイッチ釦の外周方向における前記外装アンテナ部材と前記スイッチ釦の前記金属部との間の距離よりも短く設定されていることを特徴とするアンテナ装置である。 The invention according to claim 6 is the antenna device according to claim 5, wherein the distance between the external antenna member and the metal portion of the switch button in the operation direction of the switch button is the outer circumference of the switch button The antenna device is characterized in that the distance between the external antenna member and the metal portion of the switch button in the direction is set shorter.

請求項７に記載の発明は、請求項１〜請求項６のいずれかに記載されたアンテナ装置を備え、前記ケース本体の下部に設けられた裏蓋と、前記ケース本体の貫通孔に嵌め込まれた金属部を含むスイッチ釦と、前記ケース本体の上部に、ガラスが設けられた前記外装アンテナ部材と、を備えていることを特徴とする時計である。 The invention according to claim 7 includes the antenna device according to any one of claims 1 to 6, and is fitted into a back cover provided at the lower part of the case main body and the through hole of the case main body. A timepiece comprising: a switch button including the metal portion; and the external antenna member provided with glass on an upper portion of the case main body.

１腕時計ケース
５スイッチ釦
６時計モジュール
７回路基板
８ケース本体
９外装アンテナ部材
１０貫通孔
１１受信回路部
１２操作軸
１３釦部
１４筒状部材
１４ａ小径部
１４ｂ中径部
１４ｃ大径部
２０食込み部
DESCRIPTION OF SYMBOLS 1 watch case 5 switch button 6 watch module 7 circuit board 8 case main body 9 exterior antenna member 10 through hole 11 reception circuit portion 12 operation shaft 13 button portion 14 cylindrical member 14 a small diameter portion 14 b medium diameter portion 14 c large diameter portion 20 recessed portion

Claims

Case body made of synthetic resin,
A metallic external antenna member provided on the upper portion of the case body for receiving radio waves;
A metal part provided in the vicinity of the external antenna member;
Equipped with
An antenna device characterized in that a distance between the external antenna member and the metal part is set to a length at which capacitive coupling becomes weak.

The antenna device according to claim 1, wherein the distance between the external antenna member and the metal component is set to a length when the amount of change of the resonance frequency of the radio wave is small as a reference value. Antenna device.

The antenna device according to claim 2, wherein the distance between the external antenna member and the metal component is set to a length having a predetermined swing width with respect to the length of the reference value. Antenna device to be.

The antenna device according to claim 3, wherein the length having the predetermined swing width with respect to the length of the reference value is both in the external antenna member for the case main body and the metal component for the case main body. An antenna device characterized by being set within a range of dimensional tolerances.

The antenna device according to any one of claims 1 to 4, wherein the metal component is a switch button provided on a side portion of the case main body and including a metal portion.

The antenna device according to claim 5, wherein the distance between the external antenna member and the metal portion of the switch button in the operation direction of the switch button is the external antenna member and the switch in the outer peripheral direction of the switch button. An antenna device characterized by being set shorter than a distance between the button and the metal part.

A switch button comprising the antenna device according to any one of claims 1 to 6, a back cover provided at a lower part of the case main body, and a metal portion fitted in a through hole of the case main body; A watch comprising: the external antenna member provided with glass at an upper portion of the case main body.