Electronic timepiece having a conductive member spaced apart from a planar antenna

Patent metadata

Field	Value
Publication number	US-11221591-B2
Application number	US-201916361291-A
Country	US
Kind code	B2
Filing date	Mar 22, 2019
Priority date	Mar 23, 2018
Publication date	Jan 11, 2022
Grant date	Jan 11, 2022

Abstract

In an electronic timepiece, a plurality of electric motors, a secondary battery, and a planar antenna are disposed so as not to overlap each other in a plan view when viewed in a direction perpendicular to a dial, in the plan view, a first conductive member and a second conductive member which connect a solar battery and a printed circuit board to each other are disposed in a region different from a region where the planar antenna is disposed when a plane region of the dial is divided into two regions with an imaginary straight line passing through a plane center position of the dial, and the first conductive member and the second conductive member are disposed with a space.

First claim

What is claimed is:

1. An electronic timepiece comprising:
an exterior case having a back cover;
a hand accommodated in the exterior case;
a dial accommodated in the exterior case;
a solar battery accommodated in the exterior case and disposed between the dial and the back cover;
a planar antenna accommodated in the exterior case and disposed between the dial and the back cover;
a plurality of electric motors accommodated in the exterior case, disposed so as not to overlap the planar antenna in a plan view when viewed in a direction perpendicular to the dial, and driving the hand;
a secondary battery accommodated in the exterior case, disposed so as not to overlap the planar antenna and the plurality of electric motors in the plan view, and charged by the solar battery;
a printed circuit board accommodated in the exterior case and disposed between the solar battery and the back cover; and
a first conductive member and a second conductive member that connect the solar battery and the printed circuit board to each other, and are disposed spaced apart from each other,
wherein the dial is divided into a first region and a second region by an imaginary line passing through a plane center position of the dial,
the planar antenna is disposed in the first region, and
the first conductive member and the second conductive member are disposed in the second region.

2. The electronic timepiece according to claim 1 ,
wherein the first conductive member and the second conductive member are disposed such that an angle between the first conductive member and the second conductive member with respect to the plane center position in the plan view is 40 degrees or more and 80 degrees or less.

3. The electronic timepiece according to claim 1 ,
wherein the secondary battery is disposed in a region different from a region where the planar antenna is disposed, in the plan view.

4. The electronic timepiece according to claim 1 ,
wherein, in the plan view, when the plane region of the dial is divided into four regions of a first region to a fourth region with a first imaginary straight line and a second imaginary straight line passing through the plane center position of the dial and orthogonal to each other, the planar antenna is disposed so as to overlap the adjacent first region and second region, the first conductive member is disposed in the third region, and the second conductive member is disposed in the fourth region.

5. The electronic timepiece according to claim 4 ,
wherein the first region is disposed in a range of 9 o'clock to 12 o'clock of the dial, the second region is disposed in a range of 12 o'clock to 3 o'clock of the dial, the third region is disposed in a range of 3 o'clock to 6 o'clock of the dial, and the fourth region is disposed in a range of 6 o'clock to 9 o'clock of the dial.

6. The electronic timepiece according to claim 4 ,
wherein the planar antenna includes a power feeding portion disposed in the first region in the plan view, and
a reception IC for the planar antenna is disposed in the first region in the plan view.

7. The electronic timepiece according to claim 1 ,
wherein the planar antenna is a patch antenna.

8. The electronic timepiece according to claim 1 ,
wherein the solar battery includes eight or more cells connected in series.

9. The electronic timepiece according to claim 1 , further comprising:
a cover member that covers an outer periphery of the dial in the plan view,
wherein the first conductive member and the second conductive member are disposed respectively at positions overlapping the cover member in the plan view.

Assignees

• Seiko Epson Corp

Inventors

• Nakajima Yasuo

Classifications

• G04R60/12

  inside metal cases · CPC title

• G04G17/04 Primary

  Mounting of electronic components · CPC title

• G04C10/00

  Arrangements of electric power supplies in time-pieces {(Mounting, assembling of components G04C3/008)} · CPC title

• G04G19/00

  Electric power supply circuits specially adapted for use in electronic time-pieces · CPC title

• G04C3/146 Primary

  incorporating two or more stepping motors or rotors · CPC title