To provide an antenna with excellent radio wave reception performance, a wrist watch employing the antenna, and a manufacturing method of the antenna.
A core 10 is a lamination core formed by laminating thin pieces made of an amorphous soft magnetic alloy, and configured by laminating a required number of parts each comprising: a short piece 11 including a narrow straight line part 11a and a wide flange part at both ends of the part 11a; and a long piece 12 including a narrow straight line part 12a, a wide flange part 12b at both ends of the part 12a, and an extension part 12c is formed on the flange part. When the core 10 is contained in a case main body 16 and a case cover 17, the wide flange part 12b is deformed by pushing of a flange cover 17c of the case cover 17 to provide a gap S for splitting the lamination of the flange part.
SANO TAKASHI
KIMURA TAKESHI
ARAKI HIROKAZU
MITA MASAHIRO
KOTANI TADASHI
ISHIMOTO TAKAYUKI
HITACHI METALS LTD
HITACHI FERRITE ELECT LTD
Yoshio Arafune
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