Kyocera Document Solutions Inc.

Shogo Usui

Satoshi Ishii

Provided is an image forming apparatus that cools a cooled unit with high cooling efficiency in the longitudinal direction with a simple structure. A connecting opening portion is provided in a boundary surface that partitions between a cooling duct and a parallel duct. A rectifying plate is shaped so as to deflect a flow of air from the right side to the left side in the vicinity of the connecting opening portion toward the lower side or toward the upper side. Low-temperature cooling air flow from the parallel duct into the cooling duct via the connecting opening portion. Alternatively, inside the cooling duct, high-temperature cooling air is removed through the connecting opening portion.

Image forming apparatus equipped with air cooling mechanism for cooling components (cooled units) during use

An image forming apparatus includes a toner containing portion, an air blowing portion, and an air blowing control portion. The toner containing portion contains toner that is used in image formation. The air blowing portion generates an airflow that contacts an outer side surface of the toner containing portion. The air blowing control portion narrows a vertical range of the airflow, which is generated by the air blowing portion and contacts the outer side surface of the toner containing portion, downward in a vertical direction in correspondence with reduction of toner amount in the toner containing portion.

Image forming apparatus with air blowing portion

A fixing device includes a pressure member, a heating member, a coil, a first magnetic core, a second magnetic core, a shielding portion, and a switching belt. The second magnetic core is disposed to extend in a width direction in a hollow portion formed by the loop of the coil, and formed in an arc shape with a protruding portion at a side facing the heating member. The shielding portion is formed of a non-magnetic material to shield a path of a magnetic flux generated by the coil between the second magnetic core and the heating member. The switching belt includes a surface where the shielding portion is disposed to face a non-paper passing region in the heating member, suspended to be rotatable between a roller and the protruding portion, and selectively arranged in one of a shielding position and a non-shielding position by rotation of the roller.

Fixing device for efficiently heating of heating member

A magnetic core surrounds a coil and has a plurality of first core sections arrayed along the widthwise direction of a recording medium orthogonally to the conveyance direction of the recording medium, and a second core section disposed at both ends in the widthwise direction within a hollow section of the coil. The second core section is formed so that the cross-sectional area thereof in the conveyance direction of the recording medium grows progressively larger from the center of the widthwise direction towards the end thereof.

Fuser device and image forming apparatus provided with same

A fixing device includes a heating member, a pressing member, and an induction heating unit. In this fixing device, (i) a wound width Wc of a center portion of an induction heating coil in a longitudinal direction seen from an axial direction of the heating member, (ii) a wound width Wp in the vicinity of and inside edges of a maximum recording medium passing region of a recoding medium, and (iii) a wound width We of at least one of both edges of the induction heating coil in the longitudinal direction satisfy parameters that the wound width Wc is smaller than the wound width Wp and is larger than or equal to the wound width We.

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Osaka, Japan

Shogo Usui