Patent ID: 9225869
Filing Date: 2015-12-29
Classification: H04N

Abstract:
1. An image reading device comprising: a reading unit configured to read an image of a document; a feeing unit configured to feed the document; a carriage configured to hold and move the reading unit in a predetermined direction; a motor; a motor-side transmission gear configured to transmit power supplied from the motor; a feeding unit-side transmission gear configured to transmit the power to the feeding unit; a carriage-side transmission gear configured to transmit the power to the carriage; a switching gear configured to be switched between a carriage-side position, in which the motor-side transmission gear and the carriage-side transmission gear are coupled, and a feeding unit-side position, in which the motor-side transmission gear and the feeding unit-side transmission gear are coupled; a reading table, on which the document is configured to be placed in the carriage read mode; a detection member configured to be used for detecting a home position and provided between the reading table and a feeding unit reading position, in which the carriage is positioned in the feeding unit read mode to read the document fed by the feeing unit; and a control unit configured to perform: wherein in a case where the feeding unit read mode has been executed at the previous time and the carriage read mode is executed at a present time, the control unit is configured to perform a scanning moving process comprising: wherein the driving amount of the motor in the switching process is less than a sum of a first driving amount for moving the switching gear from the feeding unit-side position to the carriage-side position, and a second driving amount for moving the carriage from the feeding unit read position to the home position.