| 主权项 |
1. A sheet feeding device comprising:
a cassette receiving section; a cassette configured to be detachably attached to the cassette receiving section and to be loaded with a plurality of sheets; a size detector configured to detect a size of the sheets loaded in the cassette; an attachment detector configured to detect attachment of the cassette to the cassette receiving section; and a controller, wherein the cassette includes a regulating member configured to be slidable relative to the cassette and align edges of the sheets, the size detector includes
an interlocking member that is disposed on the cassette and includes a plurality of size-detection target portions, the interlocking member being configured to move in conjunction with sliding of the regulating member, anda switch unit that is disposed on an inner wall of the cassette receiving section so as to be opposite to the cassette and includes a plurality of switches, the switch unit is configured to detect a position of the regulating member based on a state of the plurality of switches that detect the plurality of size-detection target portions, the attachment detector includes
an attachment-detection target member disposed on the cassette, andan attachment detecting member that is disposed on the inner wall of the cassette receiving section so as to be spaced from the switch unit and opposite to the attachment-detection target member, the attachment detecting member being configured to detect the attachment-detection target member in response to attachment of the cassette to the cassette receiving section, the cassette further includes
a loading member configured to be loaded with the plurality of sheets,a shaft configured to rotate according to a loading amount of the plurality of sheets, anda lift member configured to abut against a lower surface of the loading member and rotate with the shaft so as to lift up and down the loading member, the lower surface being opposite to a loading surface of the loading member on which the plurality of sheets are loaded, the attachment detector is a loading amount detector configured to detect the loading amount of the plurality of sheets loaded on the loading member, the attachment-detection target member is disposed at an end of the shaft so as to rotate integrally with the shaft, the attachment detecting member includes a plurality of sensors arranged along a rotation direction of the attachment-detection target member, at least one of the plurality of sensors detects blocking of a corresponding optical path by the attachment-detection target member upon attachment of the cassette to the cassette receiving section and at least one of the plurality of sensors detects blocking of a corresponding optical path by the attachment-detection target member upon rotation of the attachment-detection target member in conjunction with rotation of the shaft, and the controller is configured to detect the loading amount based on a state of the plurality of sensors, and to detect the size of the sheets based on a state of the switch unit in response to the attachment detector detecting attachment of the cassette to the cassette receiving section. |
