Title:
時計用部品および時計
Document Type and Number:
Japanese Patent JP6834632
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a watch component having excellent aesthetic properties (in particular, having high brightness and exhibiting a bright appearance), excellent corrosion resistance and excellent abrasion resistance.SOLUTION: A watch component 10 includes: a base material 1; and a first coating film 2 of Co as a main component, which contains Cr the content of which is in a range of 26 mass% to 30 mass%, and Mo the content of which is 5 -7 mass% or less. A surface of the first coating film 2 is, when measured using an atomic force microscope, a surface area increase rate of the surface of the first coating film 2 is 0-1.2% or less with respect to a flat face as a reference.SELECTED DRAWING: Figure 2
Inventors:
Tomohiko Togawa
Akira Tsukamoto
Jun Kawakami
Takahashi Hirokazu
Akira Tsukamoto
Jun Kawakami
Takahashi Hirokazu
Application Number:
JP2017048623A
Publication Date:
February 24, 2021
Filing Date:
March 14, 2017
Export Citation:
Assignee:
Seiko Epson Corporation
International Classes:
G04B37/22; A44C5/00
Domestic Patent References:
| JP2003253473A | ||||
| JP2005264191A | ||||
| JP2013194276A | ||||
| JP2013224965A | ||||
| JP2008133542A | ||||
| JP2015183277A | ||||
| JP2003247084A |
Foreign References:
| WO2014101772A1 | ||||
| CH707950A3 | ||||
| WO2012167008A1 | ||||
| US20110296873 |
Attorney, Agent or Firm:
Tatsuya Masuda
Kazuo Asahi
Kazuo Asahi