Timepiece

Patent metadata

Field	Value
Publication number	US-11614713-B2
Application number	US-201916724168-A
Country	US
Kind code	B2
Filing date	Dec 20, 2019
Priority date	Dec 25, 2018
Publication date	Mar 28, 2023
Grant date	Mar 28, 2023

Abstract

Provided is a timepiece including: hands being an hour hand, a minute hand and a second hand; a movement for driving the hands; a first dial; a first dial ring having upper and lower surfaces provided with an upper projection and a lower projection, respectively, the first dial ring being disposed on the first dial and positioned relative to the first dial by the lower projection; and a transparent second dial disposed on the first dial ring and positioned relative to the first dial ring by the upper projection, wherein one of the hands is disposed between the first dial and the second dial, while the others of the hands are disposed above the second dial.

First claim

What is claimed is:

1. A timepiece comprising:
hands being an hour hand, a minute hand and a second hand;
a movement for driving the hands;
a first dial;
a first dial ring having upper and lower surfaces provided with an upper projection and a lower projection, respectively, the first dial ring being disposed on the first dial and positioned relative to the first dial by the lower projection;
a transparent second dial disposed on the first dial ring and positioned relative to the first dial ring by the upper projection;
a second dial ring disposed on the second dial so as to cover the upper projection, the second dial ring being positioned relative to the second dial by a fit between projections and depressions;
a third dial ring having an inner circumferential surface in contact with an outer circumferential surface of the second dial ring, the third dial ring having a first scale on its upper surface and having a gear along its circumference; and
a crown fitted to the gear and configured to be operated by a user to rotate the third dial ring,
wherein one of the hands is disposed between the first dial and the second dial, while the others of the hands are disposed above the second dial, and
the second dial ring has a second scale on its upper surface, the second scale functioning as a circular slide rule in combination with the first scale.

2. The timepiece according to claim 1 , wherein the hour hand is disposed between the first dial and the second dial, while the minute hand and the second hand are disposed above the second dial.

3. The timepiece according to claim 1 , wherein the first dial is positioned relative to the movement by a fit between projections and depressions.

4. The timepiece according to claim 1 , further comprising a small hand for indicating information other than a time indicated by the hands, wherein
the small hand is driven by the movement and displaced from the hands in a thickness direction of the timepiece between the first dial and the second dial.

5. The timepiece according to claim 1 , wherein the second dial has a central opening through which one of the hands is visible from above the second dial.

6. The timepiece according to claim 1 , wherein the second dial has indices for indicating a time, the indices being composed of a mixture of a resin and decorative particles.

7. The timepiece according to claim 6 , wherein the decorative particles are particles of a noctilucent inorganic compound.

Assignees

• Citizen Watch Co Ltd

Inventors

• Kuroda Akihiko
• Tada Kazuki
• Matsushita Yuya
• Kachi Setsuo

Classifications

• G04B19/065 Primary

  with several parts · CPC title

• G04B19/04 Primary

  Hands; Discs with a single mark or the like {(moving indicating arrangements which have scales or numbers with stationary hands or reading means G04B19/20; optical projection of the position of the hands G04B19/34)} · CPC title

• G04B19/12

  Selection of materials for dials or graduations {markings} · CPC title

• G04B19/22

  Arrangements for indicating different local apparent times; Universal time pieces {(indicating by means of numbers or signs disposed on moving devices G04B19/20; illumination of dials or hands G04B19/30; combination with a terrestial globe in general G04B47/02; electronic time-zone watches G04G9/0076)} · CPC title