Timepiece

Patent metadata

Field	Value
Publication number	US-2024036521-A1
Application number	US-202318361111-A
Country	US
Kind code	A1
Filing date	Jul 28, 2023
Priority date	Jul 29, 2022
Publication date	Feb 1, 2024
Grant date	—

Abstract

A timepiece includes a case having a cylindrical shape, a case back including a transmissive region and covering one opening of the case, and a movement accommodated in the case, the movement including a timepiece component, a first magnetic shield component covering at least a portion on the case back side of the timepiece component, and a second magnetic shield component covering at least a portion of a side surface of the timepiece component. The first magnetic shield component includes an overlapping region overlapping the second magnetic shield component in plan view as viewed from a direction perpendicular to the case back, and the first magnetic shield component and the second magnetic shield component are disposed in contact with each other in the overlapping region.

First claim

What is claimed is:

1 . A timepiece comprising:
a case having a cylindrical shape; a case back including a transmissive region and covering one opening of the case; and a movement accommodated in the case, the movement including
a timepiece component,
a first magnetic shield component covering at least a portion on a case back side of the timepiece component, and
a second magnetic shield component covering at least a portion of a side surface of the timepiece component, wherein
the first magnetic shield component includes an overlapping region overlapping the second magnetic shield component in plan view as viewed from a direction perpendicular to the case back and the first magnetic shield component and the second magnetic shield component are disposed in contact with each other in the overlapping region.

2 . The timepiece according to claim 1 , wherein a plurality of the overlapping regions are provided.

3 . The timepiece according to claim 1 , wherein
the movement includes
a train wheel and
a bridge component holding the train wheel,
the first magnetic shield component includes
a main body portion covering at least a portion on the case back side of the timepiece component,
a side portion extending from the main body portion to a side surface of the timepiece component, and
an overlapping portion provided continuously to the side portion and forming the overlapping region,
a continuous portion between the main body portion and the side portion is covered with the bridge component in plan view as viewed from the case back side, and the overlapping portion is covered with the second magnetic shield component in plan view as viewed from the case back side.

4 . The timepiece according to claim 3 , wherein
the movement includes an oscillating weight, the oscillating weight including a weight and a weight body supporting the weight, a step is provided between the main body portion and the overlapping portion in a side view as viewed from a direction parallel to a surface of the case back, and a portion of the weight is disposed at the step.

5 . The timepiece according to claim 1 , wherein the timepiece component is a coil block including a coil and a stator.

6 . The timepiece according to claim 5 , wherein
the movement includes a mechanical energy source and the coil block constitutes a generator configured to convert energy from the mechanical energy source into electric power.

7 . The timepiece according to claim 1 , wherein the first magnetic shield component and the second magnetic shield component are in contact with each other in the overlapping region by being fixed by a screw in an axial direction of the case.

Assignees

• Seiko Epson Corp

Inventors

• Aoki Shunsei

Classifications

• G04B43/00 Primary

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

• G04B43/007

  Antimagnetic alloys (antimagnetic alloys with temperature compensation G04B17/227; apparatus for antimagnetising G04D9/00; alloys in general C22C) · CPC title