JP2015075645A5

JP2015075645A5 -

Info

Publication number: JP2015075645A5
Application number: JP2013212032A
Authority: JP
Filing date: 2013-10-09
Publication date: 2016-11-10
Anticipated expiration: 2033-10-09

Claims

The first surface has a document placement surface, and the first outer edge of the placement surface extends in the first direction from the origin, while the second outer edge of the placement surface extends from the origin to the first direction. A document table extending in a second direction that intersects;
A document holding white plate that is displaceable between a closed position that overlaps the placement surface and a detection position that forms an acute angle with respect to the placement surface by pivoting about a pivot shaft extending in the first direction;
A reading unit that reads the document placed on the placement surface from a second surface side opposite to the first surface of the document table;
An optical sensor for detecting the document from the second surface side of the document table;
With
An image reading apparatus, wherein an optical axis of the optical sensor is inclined from the inside to the outside of the second outer edge.

The image reading apparatus according to claim 1, wherein an optical axis of the optical sensor intersects the first surface.

The optical sensor includes a light projecting unit that emits light from the second surface side of the document table toward the placement surface, and the optical axis that is inclined from the inner side to the outer side of the second outer edge. A light receiving portion,
3. The image reading apparatus according to claim 1, wherein the optical axis of the light receiving unit is separated from the original pressing white plate when the original pressing white plate is disposed at the detection position.

4. The image reading apparatus according to claim 3, wherein in the first direction, the light receiving unit is disposed at a position closer to the second outer edge than the light projecting unit. 5.

The light projecting unit, the so incident angle to the platen is below 45 degrees 15 degrees, according to claim 3 or claim, characterized in that for emitting light toward the outside from the inside of the second outer edge Item 5. The image reading apparatus according to Item 4 .

A first detector for detecting a length of the document in the first direction;
A second detection unit including a plurality of the optical sensors arranged in the second direction in order to detect the length of the document in the second direction;
Wherein the first detection unit, as claimed in any one of claims 1 to 5, characterized in that it is located away from the said origin than the second detection portion in the first direction Image reading device.

The pivot shaft is disposed on the origin side of the placement surface in the second direction,
A plurality of the optical sensors are arranged along the second outer edge, and an intersection angle of the optical axis of the optical sensor with respect to the mounting surface is different according to a distance in the second direction from the origin. The image reading apparatus according to any one of claims 1 to 6 .

An optical sensor accommodating portion for accommodating the optical sensor having an opening that opens toward the document table;
The image reading apparatus as claimed in any one of claims 1 to 7, characterized in that it comprises a light absorbing member disposed along the opening.