Image reading apparatus
AssigneeCanon Kabushiki Kaisha
InventorsShigeru Kawasaki, Tsuyoshi Yoshida, Hiroyuki Takahara
Life of this patent
Estimating the term…
Abstract
An image reading apparatus includes a drive unit that is mounted on a carriage having an image reading sensor, which is moved with respect to an original, mounted thereon and moves the carriage. The drive unit includes: a motor; a gear train for transmitting rotation of the motor so as to move the carriage; an encoder sensor for reading a code wheel fixed to a rotary shaft of the motor; and a support member for holding the motor. The encoder sensor is urged against a part of the support member by a resilient member, to be thus fixed to the support member.
Claims11
An image reading apparatus comprising:
- a table having a surface on which an original is placed;
- a carriage that includes an image sensor mounted thereon and configured to move in a scan direction parallel to the surface and crossing a longitudinal direction of the image sensor;
- and
- a drive unit that is mounted on the carriage so as to move with the carriage in the scan direction,
- the drive unit including:
- a motor having a rotary shaft and a motor housing,
- a gear train configured to transmit rotation of the rotary shaft so as to move the carriage,
- a code wheel fixed to the rotary shaft,
- an encoder sensor including a sensor housing and a sensing element mounted in the sensor housing, the encoder sensor configured to read the code wheel, and
- a motor holder configured to hold the motor housing, the motor holder being fixed on the carriage,
- wherein the sensor housing comes into contact with the motor holder by being urged with a resilient member in a direction substantially parallel to an axis of the rotary shaft, such that both of the motor housing and the sensor housing are positioned with respect to the motor holder.
An image reading apparatus comprising:
- a table having a surface on which an original is placed;
- a carriage that includes an image sensor mounted thereon and configured to move in a scan direction parallel to the surface and crossing a longitudinal direction of the image sensor;
- and
- a drive unit mounted on the carriage so as to move with the carriage in the scan direction,
- the drive unit including:
- a motor having a rotary shaft and a motor housing,
- a gear train configured to transmit rotation of the rotary shaft so as to move the carriage,
- a code wheel fixed to one end of the rotary shaft,
- an encoder sensor including a light source and a light receiving element mounted in a sensor housing, the encoder sensor configured to read the code wheel,
- a motor holder configured to hold the motor housing, the motor holder being fixed on the carriage, and
- an electric board on which the encoder sensor and a connector are mounted, wherein the connecter is electrically connected to the encoder sensor and the motor,
- wherein the sensor housing comes into contact with the motor holder such that both of the motor housing and the sensor housing are positioned with respect to the motor holder, and
- wherein as the drive unit on the carriage is viewed in a direction perpendicular to the surface, the motor, the gear train, the encoder sensor, the code wheel, and the electric board are arranged on one side in the scan direction with respect to the image sensor.
Dependencies are inferred from the claim text.