US 12,192,425 B2
Image reading device having measuring section with encoder
Kazuhiko Arimori, Kitakyushu (JP); Makoto Wada, Kitakyushu (JP); and Masaya Yamasaki, Kitakyushu (JP)
Assigned to Seiko Epson Corporation, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Nov. 6, 2023, as Appl. No. 18/502,328.
Claims priority of application No. 2022-178108 (JP), filed on Nov. 7, 2022.
Prior Publication US 2024/0155065 A1, May 9, 2024
Int. Cl. H04N 1/053 (2006.01); H04N 1/00 (2006.01); H04N 1/387 (2006.01)
CPC H04N 1/053 (2013.01) [H04N 1/00657 (2013.01); H04N 1/3872 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An image reading device comprising:
a motor;
a reading section that reads an image on a medium;
a first transporting roller that transports the medium in a transport direction by driving force of the motor and that is provided upstream of the reading section in the transport direction;
a second transporting roller that transports the medium in the transport direction by driving force of the motor and that is provided downstream of the reading section in the transport direction; and
a measuring section configured to measure, using an encoder sensor, the rotational position of an encoder scale, wherein
the encoder scale is provided on a rotation shaft of the second transporting roller,
the first transporting roller includes
an upper first transporting roller, and
a lower first transporting roller that nips the medium with the upper first transporting roller at a first nip position and transports the medium,
the second transporting roller includes
an upper second transporting roller, and
a lower second transporting roller that nips the medium with the upper second transporting roller at a second nip position transports the medium,
the motor transmits driving force to rotation shafts of the upper first transporting roller, the lower first transporting roller, the upper second transporting roller, and the lower second transporting roller,
a length of the apparatus in a depth direction at a position where second transporting roller is provided is longer than a length of the apparatus in the depth direction at a position where the first transporting roller is provided, and
the encoder scale is provided on a rotation shaft of the lower second transporting roller.