Title:
電波時計
Document Type and Number:
Japanese Patent JP7075410
Kind Code:
B2
Abstract:
A radio wave watch (1) includes: an exterior case (2); a dial plate (4) disposed within the exterior case; a substrate (7) disposed on a rear side of the dial plate within the exterior case; a first ground layer (71) disposed on the substrate; an antenna (9) that has a planar emitting electrode (91) disposed between a center of the exterior case and an inner wall surface (21a) of the exterior case and opposed to the first ground layer, a planar short-circuit part (92) electrically connecting an end part of the emitting electrode to the first ground layer, and a connecting part (93) connecting the emitting electrode to a receiving circuit of the substrate; and a second ground layer (72) disposed on an opposite side to the emitting electrode side across the short-circuit part on the substrate and having a width equal to or greater than a width of the short-circuit part.
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Inventors:
Yoshiyasu Watanabe
Ken Kitamura
Shuji Naka
Akira Kato
Ken Kitamura
Shuji Naka
Akira Kato
Application Number:
JP2019546611A
Publication Date:
May 25, 2022
Filing Date:
September 18, 2018
Export Citation:
Assignee:
CITIZEN WATCH CO.,LTD.
International Classes:
G04R60/10; G04C9/00; G04C10/02; G04G19/00; G04G21/04
Domestic Patent References:
| JP2016080356A | ||||
| JP2003318650A | ||||
| JP2017037057A | ||||
| JP2013247598A | ||||
| JP2011146779A |
Foreign References:
| CN104536288A |
Attorney, Agent or Firm:
Toranomon Intellectual Property Office
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