RADIO-CONTROLLED CLOCK

PROBLEM TO BE SOLVED: To provide a radio-controlled clock suppressing the variation of reception sensitivity.SOLUTION: A radio-controlled clock has an exterior case 10; a cover glass 13 which blocks one of openings of the exterior case 10; a cover 14 which blocks the other opening; a drive mechanism 30 which is disposed between the cover glass 13 and the cover 14 to perform clocking; and a slot antenna which is disposed between the cover glass 13 and the drive mechanism 30, and is formed with a slot portion along an outer periphery of the drive mechanism 30. The radio-controlled clock is equipped with a dielectric 510 inserted in the clot portion. The dielectric 510 has a regulating portion which regulates a distance to the drive mechanism 30 of the slot antenna, and a fixing portion for fixing the dielectric 510 to the drive mechanism 30. The drive mechanism 30 has a positioning portion 35 which is engaged with the fixing portion, and positions the dielectric 510 to the drive mechanism 30 to fix.SELECTED DRAWING: Figure 2 【課題】受信感度のばらつきを抑えた電波時計を提供する。【解決手段】電波時計は、外装ケース１０と、外装ケース１０の開口のうち一方の開口を塞ぐカバーガラス１３と、他方の開口を塞ぐ蓋１４と、カバーガラス１３及び蓋１４の間に配置されて計時を行う駆動機構３０と、カバーガラス１３及び駆動機構３０の間に配置されて駆動機構３０の外周に沿ってスロット部が形成されたスロットアンテナと、を有する電波時計であって、スロット部に挿通される誘電体５１０を備え、誘電体５１０は、スロットアンテナの駆動機構３０に対する距離を規定する規定部と、誘電体５１０を駆動機構３０に固定するための固定部とを有し、駆動機構３０は、固定部と係合し、駆動機構３０に対する誘電体５１０の位置決めを行い固定するための位置決め部３５を有する。【選択図】図２