US 11,813,889 B2
Decorative component and method for manufacturing the same
Shosaku Aruga, Tokyo (JP); and Isao Setojima, Tokyo (JP)
Assigned to CITIZEN WATCH CO., LTD., Tokyo (JP)
Filed by CITIZEN WATCH CO., LTD., Tokyo (JP)
Filed on May 8, 2019, as Appl. No. 16/407,140.
Claims priority of application No. 2018-092204 (JP), filed on May 11, 2018.
Prior Publication US 2019/0344606 A1, Nov. 14, 2019
Int. Cl. B23K 26/362 (2014.01); B23K 26/359 (2014.01); B44C 1/22 (2006.01)
CPC B44C 1/228 (2013.01) [B23K 26/359 (2015.10); B23K 26/362 (2013.01); B32B 2605/003 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method for manufacturing by laser light irradiation a component provided with a decoration having decorative patterns, the method comprising:
irradiating a target region in a surface of the component with a first laser light so as to draw a first decorative pattern including a plurality of first straight lines;
sequentially irradiating the target region with a second laser light so as to draw a second decorative pattern including a plurality of second straight lines;
additionally irradiating the target region with laser light so as to lastly draw another decorative pattern including a plurality of third straight lines on the target region after the second decorative pattern is formed,
wherein
the decoration is a hairline finish which is composed of a large number of hair-like lines drawn in a single direction,
the first decorative pattern includes lines extending from one end to the other end thereof and lines broken between both ends,
the lines in the first decorative pattern are non-uniformly spaced in a direction perpendicular to an extending direction of the lines therein,
the second decorative pattern includes lines which are broken between both ends thereof and displaced from each other in the direction of the lines,
the lines in the second decorative pattern are uniformly spaced in the direction perpendicular to the extending direction of the lines therein,
the lastly-drawn another decorative pattern is composed of a plurality of straight and parallel lines extending from an end to the other end thereof,
the lastly-drawn another decorative pattern is overlaid on the first decorative pattern and the second decorative pattern,
the lines of the lastly-drawn decorative pattern are spaced narrower than those of the first decorative pattern and the second decorative pattern which are previously formed before forming the last-drawn decorative pattern, and
the first decorative pattern, the second decorative pattern and the lastly-drawn another decorative pattern are different from one another.