Electronic timepiece

Patent metadata

Field	Value
Publication number	US-10180660-B2
Application number	US-201615252723-A
Country	US
Kind code	B2
Filing date	Aug 31, 2016
Priority date	Sep 7, 2015
Publication date	Jan 15, 2019
Grant date	Jan 15, 2019

Abstract

In a timepiece 100 having an antenna 3 and motors 4 , each motor 4 includes a stator 41 , a coil 42 magnetically connected to the stator 41 , and a rotor magnet 431 disposed in a receiving part 411 of the stator 41 . With respect to each motor 4 disposed in a predetermined range from the antenna 3 , an individual antimagnetic plate 5 which is a belt-like antimagnetic plate configured to have a width equal to or greater than the diameter of the rotor magnet 431 and cover a portion of the motor 4 including the rotor magnet 431 is disposed.

First claim

What is claimed is:

1. An electronic timepiece comprising:
an antenna;
a motor including a stator, a coil magnetically connected to the stator, and a rotor magnet disposed in a receiving part of the stator; and
a belt-like antimagnetic plate configured to have a width equal to or greater than a diameter of the rotor magnet and to cover a portion of the motor including the rotor magnet,
wherein the antimagnetic plate includes a first antimagnetic portion that is a belt-like portion configured to extend in a longitudinal direction of the stator and a second antimagnetic portion that is a belt-like portion configured to extend in a direction perpendicular to the first antimagnetic portion.

2. The electronic timepiece according to claim 1 , wherein:
a length of the first antimagnetic portion of the antimagnetic plate is longer than a length of the stator in the longitudinal direction of the stator.

3. The electronic timepiece according to claim 1 , wherein:
the second antimagnetic portion of the antimagnetic plate extends in a direction perpendicular to a longitudinal direction of the stator, and a length of the second antimagnetic portion is longer than a length of the stator in the direction perpendicular to the longitudinal direction of the stator.

4. The electronic timepiece according to claim 1 , wherein:
a length of the first antimagnetic portion in the extension direction is longer than a length of the stator in the longitudinal direction of the stator, and
a length of the second antimagnetic portion in the extension direction is longer than a length of the stator in a direction perpendicular to the longitudinal direction of the stator.

5. The electronic timepiece according to claim 1 , wherein:
a plurality of the motors is disposed,
a plurality of the antimagnetic plates is disposed so that each of the antimagnetic plates is arranged for a corresponding one of the motors, and
some or all of the antimagnetic plates are connected by a connection portion.

6. The electronic timepiece according to claim 2 , wherein:
a plurality of the motors is disposed,
a plurality of the antimagnetic plates is disposed so that each of the antimagnetic plates is arranged for a corresponding one of the motors, and
some or all of the antimagnetic plates are connected by a connection portion.

7. The electronic timepiece according to claim 3 , wherein:
a plurality of the motors is disposed,
a plurality of the antimagnetic plates is disposed so that each of the antimagnetic plates is arranged for a corresponding one of the motors, and
some or all of the antimagnetic plates are connected by a connection portion.

8. The electronic timepiece according to claim 4 , wherein:
a plurality of the motors is disposed,
a plurality of the antimagnetic plates is disposed so that each of the antimagnetic plates is arranged for a corresponding one of the motors, and
some or all of the antimagnetic plates are connected by a connection portion.

9. The electronic timepiece according to claim 1 , wherein:
a plurality of the motors is disposed, and at least one belt-like antimagnetic plate is disposed for a corresponding at least one motor disposed in a predetermined range from the antenna, and
the electronic timepiece further comprises:
a planar antimagnetic plate configured to cover some or all of the motors disposed outside the predetermined range from the antenna.

10. The electronic timepiece according to claim 2 , wherein:
a plurality of the motors is disposed, and at least one belt-like antimagnetic plate is disposed for a corresponding at least one motor disposed in a predetermined range from the antenna, and
the electronic timepiece further comprises:
a planar antimagnetic plate configured to cover some or all of the motors disposed outside the predetermined range from the antenna.

11. The electronic timepiece according to claim 3 , wherein:
a plurality of the motors is disposed, and at least one belt-like antimagnetic plate is disposed for a corresponding at least one motor disposed in a predetermined range from the antenna, and
the electronic timepiece further comprises:
a planar antimagnetic plate configured to cover some or all of the motors disposed outside the predetermined range from the antenna.

12. The electronic timepiece according to claim 4 , wherein:
a plurality of the motors is disposed, and at least one belt-like antimagnetic plate is disposed for a corresponding at least one motor disposed in a predetermined range from the antenna, and
the electronic timepiece further comprises:
a planar antimagnetic plate configured to cover some or all of the motors disposed outside the predetermined range from the antenna.

13. The electronic timepiece according to claim 9 , wherein:
a plurality of the belt-like antimagnetic plates is disposed so that each of the belt-like antimagnetic plates is arranged for a corresponding one of the motors disposed in the predetermined range from the antenna, and
some or all of the belt-like antimagnetic plates are connected to the planar antimagnetic plate by connection portions.

14. The electronic timepiece according to claim 10 , wherein:
a plurality of the belt-like antimagnetic plates is disposed so that each of the belt-like antimagnetic plates is arranged for a corresponding one of the motors disposed in the predetermined range from the antenna, and
some or all of the belt-like antimagnetic plates are connected to the planar antimagnetic plate by connection portions.

15. The electronic timepiece according to claim 11 , wherein:
a plurality of the belt-like antimagnetic plates is disposed so that each of the belt-like antimagnetic plates is arranged for a corresponding one of the motors disposed in the predetermined range from the antenna, and
some or all of the belt-like antimagnetic plates are connected to the planar antimagnetic plate by connection portions.

16. The electronic timepiece according to claim 12 , wherein:
a plurality of the belt-like antimagnetic plates is disposed so that each of the belt-like antimagnetic plates is arranged for a corresponding one of the motors disposed in the predetermined range from the antenna, and
some or all of the belt-like antimagnetic plates are connected to the planar antimagnetic plate by connection portions.

Assignees

• Casio Computer Co Ltd

Inventors

• Hosobuchi Hiroyuki
• Yano Junro

Classifications

• G04R60/00

  Constructional details · CPC title

• G04B43/00 Primary

  Protecting clockworks by shields or other means against external influences, e.g. magnetic fields {(demagnetising apparatus G04D9/00)} · CPC title

• G04R60/14 Primary

  specific to electromechanical timepieces, e.g. moving parts thereof · CPC title

• G04C3/146

  incorporating two or more stepping motors or rotors · CPC title

• G04G21/04 Primary

  using radio waves (radio-controlled time-pieces G04R) · CPC title