Kyocera Document Solutions Inc.

Ryotaro Todokoro

Kei Ouchi

An image reading apparatus is provided with: a reading processing unit which moves a reading unit, causes a light emitting unit to emit a first amount of light, reads an electric charge generated by a photoelectric conversion unit, and reads an image of a document placed on a document placing surface on the basis of the read electric charge; and a detection processing unit which causes a light emitting unit to emit a second amount of light greater than the first amount of light, reads an electric charge generated by the photoelectric conversion unit, and detects the size of the document placed on the document placing surface on the basis of the read electric charge.

Image reading apparatus, image forming apparatus, and document size detection method

An image forming apparatus includes a duct, a filter provided inside the duct, a first fan provided on an upstream side of the filter in an exhaust direction and a second fan provided on a downstream side of the filter in the exhaust direction. A first mode operation containing a first operation in which the first fan sends air to the filter and a second operation in which the second fan sends air to the filter after the first operation is performed at least once, and then a second mode in which the first fan sends air in the exhaust direction is performed.

Image forming apparatus including duct provided with filter

In an optical scanning device, a light source includes a first light emitting point of an amount of light corresponding to a first mode and a second light emitting point of an amount of light corresponding to a second mode, and a control unit uses light beams emitted from a light emitting point of an amount of light corresponding to a mode set by a setting unit when the writing of image data is performed and uses light beams emitted from one prescribed light emitting point as light beams for synchronization detection, regardless of the mode set by the setting unit, when synchronization detection is performed before the writing of the image data is started.

Optical scanning device and image forming apparatus including the same

An optical scanning device includes a casing (). The casing () can be stacked in a plurality of stages in a state in which a lid member () has been removed, and includes a connection leg part () extending from a predetermined position of the outside surface of a sidewall part () to a lower side of a lower surface of the casing (), and the connection leg part () is provided with an engaged part () for connection which is engaged with an engaging part () formed at a sidewall part () of another casing () when the casing () is stacked on an upper side of the other casing ().

Casing of optical scanning device

An optical scanning device includes a correction mechanism that rotates a synchronization detection mirror around a sub-scanning axis in accordance with a change in the temperature of a casing, wherein the correction mechanism includes a fixing support part provided to the casing and fixing the synchronization detection mirror thereto, and a first adhesive part and a second adhesive part respectively provided at one end side and the other end side of the synchronization detection mirror in a width direction perpendicular to a sub-scanning direction and serving as adhesives for allowing the synchronization detection mirror to adhere to the fixing support part. The correction mechanism is configured to rotate the synchronization detection mirror around the sub-scanning axis due to a difference between of thermal deformation amounts of the first adhesive part and the second adhesive part in a thickness direction when the temperature inside the casing has changed.

An adjustment method of an optical scanning device, in which an uppermost position at an incident surface of the image forming lens, through which a light beam being deflected and scanned passes, and a lowermost position at the incident surface of the image forming lens, through which a light beam being deflected and scanned passes, are detected in a height direction perpendicular to the main scanning direction in an effective range corresponding to a latent image formation target range on the scanning target surface, and a center height between the uppermost position and the lowermost position is allowed to approximately coincide with a height of a bus line of the image forming lens at the incident surface of the image forming lens.

Optical scanning device and image forming apparatus

An optical scanning device includes a light source that emits light, a deflector that deflects and scans the light emitted from the light source in a main scanning direction, a housing, a synchronization detection sensor, and a sensor board. The synchronization detection sensor is mounted in the housing, detects scanning light from the deflector, and outputs a write timing reference signal of image data. The sensor board is mounted with the synchronization detection sensor. The aforementioned sensor board is formed with a light transmitting hole for allowing a part of the scanning light to pass therethrough when an incident position of the scanning light for a light receiving surface coincides with a center position of the aforementioned light receiving surface in a sub-scanning direction on an extension line of a center line of the light receiving surface of the aforementioned synchronization detection sensor in the sub-scanning direction.

Optical scanning device, image forming apparatus including optical scanning device, and position adjustment method of synchronization detection sensor mounted in optical scanning device

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Osaka, Japan

Ryotaro Todokoro