Arm-wearable device and antenna body

Patent metadata

Field	Value
Publication number	US-2017192396-A1
Application number	US-201615392152-A
Country	US
Kind code	A1
Filing date	Dec 28, 2016
Priority date	Jan 4, 2016
Publication date	Jul 6, 2017
Grant date	—

Abstract

An electronic timepiece includes a case body, a dial plate that is accommodated in the case body so as to display a time, and an annular antenna body that is disposed around the dial plate. The antenna body has an annular base member formed in a dielectric body, and an electrically conductive power feeding element which has a band shape and to which a predetermined potential is fed from a power feeding unit, and a second electrically conductive power feeding element which has a band shape and to which a predetermined potential is fed from a power feeding unit.

First claim

What is claimed is:

1 . An arm-wearable device comprising:
an exterior case; a time display unit that is accommodated in the exterior case, and that displays a time; and an annular antenna body that is disposed around the time display unit, wherein the antenna body has an annular base member having a dielectric body, a first band-shaped power feeding element which is disposed in the base member, which is electrically conductive, and to which a predetermined potential is fed from a first power feeding unit, and a second band-shaped power feeding element which is disposed in the base member, which is electrically conductive, and to which a predetermined potential is fed from a second power feeding unit.

2 . The arm-wearable device according to claim 1 ,
wherein, in planar view of the annular base member in a vertical direction, the first power feeding element and the second power feeding element are disposed at a position where both of these do not overlap each other.

3 . The arm-wearable device according to claim 1 ,
wherein an annular or a band-shaped passive element which is electrically conductive is disposed in the base member, apart from the first power feeding element and the second power feeding element.

4 . The arm-wearable device according to claim 1 ,
wherein, in planar view of the annular base member in a vertical direction, the first power feeding unit is disposed inside a region of the first power feeding element, the second power feeding unit is disposed inside a region of the second power feeding element, and the first power feeding element and the second power feeding element are disposed at a position where both of these do not overlap each other.

5 . The arm-wearable device according to claim 1 , further comprising:
a first wireless IC chip that processes a radio signal received by the first power feeding element; and a second wireless IC chip that processes a radio signal received by the second power feeding element, wherein, in planar view of the annular base member in a vertical direction, the first wireless IC chip and the second wireless IC chip are respectively disposed inside a semicircular arc obtained by bisecting the annular base member.

6 . The arm-wearable device according to claim 1 ,
wherein the first power feeding unit or the second power feeding unit is disposed within a range from 3 o'clock to 9 o'clock of the time display unit, and receives a radio wave from a position information satellite.

7 . The arm-wearable device according to claim 1 ,
wherein either the first power feeding element or the second power feeding element whose received power is weaker than received power of the other power feeding element is disposed within a range from 3 o'clock to 9 o'clock of the time display unit.

8 . An antenna body comprising:
an annular base member that has a dielectric body; a first band-shaped power feeding element that is disposed in the base member, that is electrically conductive, and to which a predetermined potential is fed from the outside; and a second band-shaped power feeding element that is disposed in the base member, that is electrically conductive, and to which a predetermined potential is fed from the outside.

9 . The antenna body according to claim 8 ,
wherein, in planar view of the annular base member in a vertical direction, the first power feeding element and the second power feeding element are disposed at a position where both of these do not overlap each other.

10 . The antenna body according to claim 8 ,
wherein an annular or a band-shaped passive element which is electrically conductive is disposed in the base member, apart from the first power feeding element and the second power feeding element.

11 . The antenna body according to claim 8 ,
wherein, in planar view of the annular base member in a vertical direction, a first power feeding unit for feeding power to the first power feeding element is disposed inside a region of the first power feeding element, a second power feeding unit for feeding power to the second power feeding element is disposed inside a region of the second power feeding element, and the first power feeding element and the second power feeding element are disposed at a position where both of these do not overlap each other.

12 . The antenna body according to claim 8 , further comprising:
a first wireless IC chip that processes a radio signal received by the first power feeding element; and a second wireless IC chip that processes a radio signal received by the second power feeding element, wherein, in planar view of the annular base member in a vertical direction, the first wireless IC chip and the second wireless IC chip are respectively disposed inside a semicircular arc obtained by bisecting the annular base member.

13 . The antenna body according to claim 11 ,
wherein in a case where the antenna body is accommodated in an exterior case of a timepiece, either the first power feeding unit or the second power feeding unit is disposed at a position corresponding to a range from 3 o'clock to 9 o'clock of the time display unit, and receives a radio wave from a position information satellite.

14 . The antenna body according to claim 8 ,
wherein in a case where the antenna body is accommodated in an exterior case of a timepiece, either the first power feeding element or the second power feeding element whose received power is weaker than received power of the other power feeding element is disposed at a position corresponding to a range from 3 o'clock to 9 o'clock of the time display unit.

Assignees

• Seiko Epson Corp

Inventors

• Matsuzaki Jun

Classifications

• G04R20/02 Primary

  the radio signal being sent by a satellite, e.g. GPS · CPC title

• H04B1/086

  Portable receivers · CPC title

• G04R60/10 Primary

  inside cases · CPC title

• G04R60/06

  Antennas attached to or integrated in clock or watch bodies · CPC title

• H04B1/1607

  Supply circuits (converters H02M; filters therefor H02M1/14; voltage stabilisers G05F1/46) · CPC title