# US 12,001,169 B2 · Watch component, watch movement and watch

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- Number: US 12,001,169 B2
- Document ID: US12001169B2
- Status: Granted
- Kind: B2
- Application number: 16/929,212
- Filed: 2020-07-15
- Published: 2021-01-21
- Granted: 2024-06-04
- Earliest claimed: 2019-07-16
- Assignees: Seiko Epson Corporation
- Applicants: Seiko Epson Corporation
- Inventors: Takeo Funakawa
- Web page: https://patentgrep.com/patent/US12001169B2

## CPC

- G04B 15/14: Component parts or constructional details, e.g. construction of the lever or the escape wheel {(assembly and manufacture of the spring G04B1/145; assembly and manufacture of components, e.g. pinions, spindles G04B13/02; lubrication of clockwork bearings G04B31/008; oils for clockwork bearings in general G04B31/08)}
- G04B 17/32: Component parts or constructional details, e.g. collet, stud {, virole or piton}
- G04B 1/16: Barrels; Arbors; Barrel axles (arrangements facilitating the removal of the mainspring G04B33/14)
- G04B 13/02: Wheels; Pinions; Spindles; Pivots (bearings G04B31/00 {; chain wheels, spindles for chain wheels, also chains and driving weights G04B1/08})
- G04B 17/063: {Balance construction (balances with frequency adjustment screw G04B18/006; balances with temperature compensation G04B17/222; balancing devices G04B17/28)}
- G04B 19/103: {attached or inlaid numbers (attaching of jewels or ornaments G04B47/042; arrangements for attaching bearing jewels, or the like G04D3/04)}
- G04B 19/18: Graduations on the crystal or glass, on the bezel, or on the rim
- G04B 45/0076: {Decoration of the case and of parts thereof, e.g. as a method of manufacture thereof (specially shaped G04B45/0061, G04B45/0069; decoration with inscriptions and pictures G04B45/0084; construction of the hands G04B19/042; decoration by adding extra pieces to the clockwork G04B47/04; colouring by treatment of the surface, e.g. by oxidation C25D)}
- G04B 45/02: Time pieces of which the clockwork is visible partly or wholly {(figures or parts thereof moved by the clockwork G04B45/0038)}
- G04B: MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS (spring- or weight-driven mechanisms in general F03G; electromechanical clocks or watches G04C; electromechanical clocks with attached or built-in means operating any device at pre-selected times or after predetermined time intervals G04C23/00; clocks or watches with stop devices G04F7/08)

## Abstract

For example, an escape gear portion as a watch component includes a substrate containing silicon as a main component, and a light reflecting layer including a first silicon oxide layer, a silicon layer, and a second silicon oxide layer that are stacked, in this order, at the substrate, wherein, when the light reflecting layer is viewed in plan view, the light reflecting layer includes a first region and a second region, and a thickness of the silicon layer in the first region is different from a thickness of the silicon layer in the second region.

## Claims

### Claim 1

A watch component, comprising:
a substrate containing silicon as a main component; and
a light reflecting layer including a first silicon oxide layer, a silicon layer, and a second silicon oxide layer that are stacked, in this order, at the substrate,
wherein when the light reflecting layer is viewed in plan view, the light reflecting layer includes a first region and a second region,
a thickness of the silicon layer in the first region is different from a thickness of the silicon layer in the second region,
the silicon layer is sandwiched by the first and second silicon oxide layers in the first region and the second region, and
the watch component is an escape wheel and pinion, a rim portion of the escape wheel and pinion includes the first region and the second region, and at least a character or a mark is displayed by one of the first region and the second region.

### Claim 2

A watch, comprising:
a watch component including
a substrate containing silicon as a main component,
a light reflecting layer including a first silicon oxide layer, a silicon layer, and a second silicon oxide layer that are stacked, in this order, at the substrate, the light reflecting layer, when viewed in plan view, including a first region and a second region, a thickness of the silicon layer in the first region being different from a thickness of the silicon layer in the second region, and the silicon layer is sandwiched by the first and second silicon oxide layers in the first region and the second region; and
a watch case configured to house the watch component,
wherein the watch component is an escape wheel and pinion, a rim portion of the escape wheel and pinion includes the first region and the second region, and at least a character or a mark is displayed by one of the first region and the second region.