Timepiece

Patent metadata

Field	Value
Publication number	US-11625004-B2
Application number	US-202017070996-A
Country	US
Kind code	B2
Filing date	Oct 15, 2020
Priority date	Oct 16, 2019
Publication date	Apr 11, 2023
Grant date	Apr 11, 2023

Abstract

A timepiece includes a mainspring, a power reserve hand configured to indicate a remaining amount of windup of the mainspring, an indicator wheel provided with the power reserve hand attached thereto, and a solar wheel configured to rotate in a first direction when the mainspring is wound, rotate in a second direction reverse to the first direction when the mainspring is unwound, and provided with at least two pinions, one of the pinions configured to drive the indicator wheel.

First claim

What is claimed is:

1. A timepiece comprising:
a mainspring;
a power reserve hand configured to indicate a remaining amount of windup of the mainspring;
an indicator wheel provided with the power reserve hand attached thereto; and
a solar wheel configured to rotate in a first direction when the mainspring is wound, rotate in a second direction reverse to the first direction when the mainspring is unwound, and provided with first and second pinions,
wherein the first pinion is provided to an end portion, on a dial side, of a rotary shaft of the solar wheel,
the second pinion is provided to an end portion, on a case back side, of the rotary shaft of the solar wheel,
the indicator wheel includes:
a first indicator wheel driven by the first pinion; and
a second indicator wheel driven by the second pinion, and

the power reserve hand includes:
a first power reserve hand attached to the first indicator wheel and arranged to be visually recognizable from a front surface side of the timepiece; and
a second power reserve hand attached to the second indicator wheel and arranged to be visually recognizable from a back surface side of the timepiece.

2. The timepiece according to claim 1 , comprising:
an intermediate wheel configured to intermesh with the indicator wheel and one of the first pinion the second pinion.

3. The timepiece according to claim 1 , wherein
when, in a plan view as viewed from a direction orthogonal to the dial, the timepiece is divided by a line segment connecting a 12 o'clock mark and a 6 o'clock mark of the dial into two regions which are a first region including a 3 o'clock mark and a second region including a 9 o'clock mark, the solar wheel is arranged in the second region.

Assignees

• Seiko Epson Corp

Inventors

• Hiraya Eiichi

Classifications

• G04B9/005 Primary

  by optical indication of the amount of winding · CPC title

• G04B13/02

  Wheels; Pinions; Spindles; Pivots (bearings G04B31/00 {; chain wheels, spindles for chain wheels, also chains and driving weights G04B1/08}) · CPC title