Title:
針位置検出装置および電子時計
Document Type and Number:
Japanese Patent JP4985752
Kind Code:
B2
Abstract:
A hand position detecting device including: a first gear rotating with a minute hand; a second gear rotating with a second hand; a first detection target portion that is provided on the first gear and identifiable by light irradiation; a second detection target portion that is provided on the second gear and identifiable by light irradiation; and a detector, wherein the second detection target portion is formed to be divided into a plurality of parts over a predetermined angular range out of a center angle of 360° of the secondgear, andapresence-or-absence pattern of the second detection target portion in an angular range of successive N (N represents one of 5 to 10) angular segments with any angular segment being set as a start point is made different when the angular segment of the start point is different.
Inventors:
Nobuhiro Aoki
Application Number:
JP2009279986A
Publication Date:
July 25, 2012
Filing Date:
December 10, 2009
Export Citation:
Assignee:
CASIO COMPUTER CO.,LTD.
International Classes:
G04C3/00
Domestic Patent References:
| JP2001296144A | ||||
| JP2009085674A |
Attorney, Agent or Firm:
Gwangyang International Patent Office
Hiroshi Arafune
Yoshio Arafune
Hiroshi Arafune
Yoshio Arafune