# US 11,442,412 B2 · Exterior member, case and timepiece

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- Number: US 11,442,412 B2
- Document ID: US11442412B2
- Status: Granted
- Kind: B2
- Application number: 16/837,005
- Filed: 2020-04-01
- Published: 2020-10-01
- Granted: 2022-09-13
- Earliest claimed: 2019-04-01
- Assignees: Casio Computer Co., Ltd.
- Applicants: Casio Computer Co., Ltd.
- Inventors: Takumi Yasuda
- Web page: https://patentgrep.com/patent/US11442412B2

## CPC

- G04B 37/225: {Non-metallic cases}
- G04B 37/0008: {for pocket watches and wrist watches}
- G04G 17/02: Component assemblies
- G04G 17/083: {Watches distributed over several housings}
- 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)
- G04G: ELECTRONIC TIME-PIECES

## Abstract

An exterior member that is favorably manufactured, a case having the exterior member and a timepiece having the case are provided. The exterior member includes an exterior main body section in which a first resin layer is provided on one side of a sheet member formed of carbon fiber and a cutout recess section from which a portion of the sheet member is exposed is provided in the first resin layer on the one side of the sheet member, and a protection member which covers the cutout recess section of the first resin layer. Accordingly, the exterior member is favorably manufactured with its strength being increased.

## Claims

### Claim 1

An exterior member comprising:
a carbon sheet which is formed in a hollow circular shape;
a first resin layer which is provided so as to be layered on a first area of a first surface of the carbon sheet; and
a protection member which is attached so as to cover a second area other than the first area of the first surface of the carbon sheet,
wherein the carbon sheet is formed such that a radial direction width of the second area of the first surface is smaller than a radial direction width of the first area of the first surface.

### Claim 2 (depends on 1)

The exterior member according to claim 1,
wherein the exterior member has a second resin layer provided on a second surface opposite to the first surface of the carbon sheet, and
wherein the second resin layer is provided on both of a third area of the second surface corresponding to a back side of the first area of the first surface and a fourth area of the second surface corresponding to a back side of the second area of the first surface.

### Claim 3 (depends on 1)

A case comprising the exterior member according to claim 1.

### Claim 4 (depends on 3)

A timepiece comprising the case according to claim 3.

### Claim 5 (depends on 1)

The exterior member according to claim 1,
wherein the protection member includes an insertion hole, and is attached so as to cover the second area of the first surface of the carbon sheet, by a screw member being inserted into the insertion hole.

### Claim 6 (depends on 2)

The exterior member according to claim 2,
wherein the second resin layer includes an insertion section, and
wherein the protection member includes an insertion hole, and is attached so as to cover the second area of the first surface of the carbon sheet, by a screw member being inserted into the insertion hole and the screw member being also inserted into the insertion section of the second resin layer.

### Claim 7 (depends on 6)

The exterior member according to claim 6,
wherein, by the screw member being screwed into a screw hole provided in a case body, the protection member is attached to the case body together with the carbon sheet.