Electronic timepiece with internal antenna

Patent metadata

Field	Value
Publication number	US-9665071-B2
Application number	US-201514932208-A
Country	US
Kind code	B2
Filing date	Nov 4, 2015
Priority date	Feb 21, 2013
Publication date	May 30, 2017
Grant date	May 30, 2017

Abstract

An electronic timepiece has a tubular outside case of which at least part is a conductive material, a transparent crystal, a dial housed in the outside case, an annular antenna body disposed around the dial, a feed part that feeds the antenna body, and a dial ring made of a non-conductive material covering the antenna body. The antenna body includes an annular dielectric base, and an arc-shaped fed element feed by the feed part, an annular parasitic element disposed between the dial ring and crystal, and receives circularly polarized waves.

First claim

What is claimed is:

1. An electronic timepiece with internal antenna, comprising:
a tubular outside case, at least a part of the tubular outside case being made from a conductive material;
a cover member that covers one of two openings in the case;
a time display unit housed inside the case;
an annular antenna body disposed around the time display unit;
a feed part that feeds the antenna body;
wherein the antenna body includes a dielectric base and a fed element that is fed by the feed part,
the outside case has a bezel; and
a parasitic element is disposed between the bezel and the cover member, and the parasitic element is configured to receive circularly polarized waves.

2. The electronic timepiece with internal antenna described in claim 1 , wherein:
the antenna body and the parasitic element are mutually superimposed in plan view.

3. The electronic timepiece with internal antenna described in claim 1 , wherein:
the fed element is disposed on the cover member side of the antenna body.

4. The electronic timepiece with internal antenna described in claim 1 , wherein:
an annular blind member is affixed to the cover member side of the parasitic element so that the parasitic element is not visible.

5. The electronic timepiece with internal antenna described in claim 1 , wherein:
the bezel is made from a non-conductive material.

6. The electronic timepiece with internal antenna described in claim 1 , further comprising:
a non-conductive ring member that covers the antenna body.

7. The electronic timepiece with internal antenna described in claim 1 , wherein:
the antenna body is annularly shaped.

8. The electronic timepiece with internal antenna described in claim 1 , wherein:
the fed element is arc-shaped.

9. The electronic timepiece with internal antenna described in claim 1 , wherein:
the parasitic element is annularly shaped.

10. The electronic timepiece with internal antenna described in claim 1 , wherein:
the bezel and the element are fit together with the parasitic element therebetween.

Assignees

• Seiko Epson Corp

Inventors

• Fujisawa Teruhiko

Classifications

• H01Q15/244

  converting a linear polarised wave into a circular polarised wave (guided wave H01P1/17) · CPC title

• G04B47/065

  with a compass (compasses G01C17/00) · CPC title

• G04R60/08 Primary

  inside bezels · CPC title

• H01Q1/24

  with receiving set · CPC title

• G04R60/12

  inside metal cases · CPC title