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US 11,108,930 B2Granted
Image reading unit and image reading apparatus
AssigneeCanon Kabushiki Kaisha
InventorAkira Otake
Life of this patent
Estimating the term…
Abstract
An image reading unit includes an illumination portion, a reading portion, a casing, and a reflection member including a reflecting surface. The casing is provided with an opening. The reflection member is held outside of the opening of the casing so that at least a part of the reflecting surface is exposed to the inside of the casing through the opening.
Claims17
An image reading unit for reading an image of a document comprising:
- an illumination unit configured to illuminate an object with light;
- a reflection mirror configured to reflect a reflected light from the document illuminated with the light by said illumination unit;
- a converting unit configured to convert photoelectrically light reflected by the reflection mirror;
- and
- an optical box configure to hold the reflection mirror and the converting unit, the optical box including a space through which is passed the light reflected by the reflection mirror therein,
- wherein said optical box is provided with a through hole which has a shape such that a first portion having a first width with respect to a main scan direction and a second portion having a second width narrower than the first width with respect to the main scan direction are adjacent to each other in a direction crossing the main scan direction, and
- wherein said reflection mirror closes the through hole of said optical box from an outside of said optical box.
4 more elements
An image reading unit configured to read an image of a document, comprising:
- a platen on which a document is placed;
- an illumination unit configured to illuminate the document placed on the platen with light;
- a first reflection mirror configured to reflect a light from the document illuminated with the light by said illumination unit;
- a second reflection mirror configured to reflect the light which has been reflected by the first reflection mirror;
- a converting unit configured to convert photoelectrically light reflected by the first reflection mirror and the second reflection mirror;
- and
- an optical box configured to hold the first reflection mirror, the second reflection mirror and the converting unit, the optical box including a space through which is passed the light reflected by the first reflection mirror and the second reflection mirror therein, and be movable in parallel to the platen,
- wherein said optical box is provided with a first wall portion and a second wall portion opposing the first wall portion in a moving direction of said optical box,
- wherein said first wall portion is provided with a first through hole,
- wherein said second wall portion is provided with a second through hole,
- wherein said first reflection mirror closes the first through hole of said optical box from the outside of said optical box, and
- wherein said second reflection mirror closes the second through hole of said optical box from the outside of said optical box.
9 more elements
Dependencies are inferred from the claim text.