Canon Kabushiki Kaisha

Tomoki Hasegawa

Takashi Fujita

Youichi Iwasaki

Hiroyoshi Inaba

Chifuyu Tomita

An image forming apparatus comprises a housing and an image forming unit. The housing includes a protective member with a protective state in which the protective member is protecting a protection target and a non-protective state in which the protective member is not protecting the protection target, an intake port, a duct for guiding air taken in from the intake port to the image forming unit and guide the air from the image forming unit to outside of the housing, an exhaust port connected to the duct and for discharging the air to outside of the housing, a fan provided in a section from the intake port to the exhaust port in the duct and for assisting intake, discharging or both of intake and discharging of the air, and a processor for controlling the one fan.

Air ventilation structure in image forming apparatus

A lens barrel includes a first lens holder configured to hold a lens and movable along an optical axis in the lens, a cylindrical member configured to hold the first lens holder on an internal circumference surface, first and second rolling members provided to the first lens holder, and rotatably disposed at different positions in an optical axis direction of the lens, a third rolling member rotatably provided to the first lens holder, and an urging member configured to urge the third rolling member against an internal surface of the cylindrical member to an outside in a radial direction of the lens.

Lens barrel and imaging apparatus

A lens barrel includes a first moving barrel, a second moving barrel disposed on an object side and an outer circumference side of the first moving barrel and configured to hold an optical element different from a lens, a guide barrel that has a first rectilinear groove that guides a movement of the first moving barrel, and a second rectilinear groove that guides a movement of the second moving barrel in the optical axis direction, and a cam barrel rotatable relative to the guide barrel and having a first cam groove and a second cam groove. The first moving barrel includes a first protruding member engaged with the first rectilinear groove and the first cam groove. The second moving barrel includes a second protruding member engaged with the second rectilinear groove and the second cam groove.

Lens barrel and optical apparatus

A lens barrel includes a first lens holder, a second lens holder, a third lens holder, and elastically deformers, andintegrally formed on the third lens holder to apply elastic forces on the second lens holder in an optical-axis direction. The second lens holder is arranged between the first lens holder and the third lens holder. The position of the second lens holder is adjustable in the direction orthogonal to an optical axis before the second lens holder is bonded.

Lens barrel, optical apparatus, and method of manufacturing the lens barrel

The lens barrel has an image blur correction function for correcting an image blur, including: a movable member movable in a direction orthogonal to an optical axis while holding a lens and a driving magnet; and a fixed member for positioning the movable member in an optical axis direction and holding a driving coil and a magnetic member, in which: the driving magnet and the magnetic member constitute a driving portion for moving the movable member in the direction orthogonal to the optical axis; and in a plane orthogonal to the optical axis, a width of the magnetic member in a direction orthogonal to a direction of driving the movable member is larger than a width of the driving magnet in the direction orthogonal to the direction of driving the movable member.

Lens barrel and optical apparatus including the same

An aperture unit includes three or more diaphragm blades, a base plate that supports the diaphragm blades, a drive lever connected to the diaphragm blades, and an aperture motor that rotates the drive lever, wherein, in a range from a reference aperture value to a specific aperture value, a polygonal aperture is formed by aperture edges of two or more of the three or more diaphragm blades that linearly move in a first direction and an aperture edge of at least one of the three or more diaphragm blades that linearly moves in a second direction opposite to the first direction, and wherein, in a range from the specific aperture value to a closed aperture state, an aperture is formed by aperture edges of two diaphragm blades that move in opposite directions.

Aperture unit and lens barrel including the same

A lens driving device is provided that moves a lens support frame in an optical-axis direction through a rack engaging with a feed screw functioning as an output shaft of a driving unit. The rack includes a main rack tooth engaging with the feed screw and a pressing portion facing and elastically holding the feed screw through an urging portion. The pressing portion includes a guiding section for guiding a pressing tooth of the pressing portion to a predetermined regular engagement position in incorporating the feed screw even when the pressing tooth facing and holding the feed screw in the rack of the lens driving device is inclined inward.

Lens driving device, lens barrel, optical apparatus, and method for assembling lens driving device

A lens barrel includes: first and second movable lens units; first and second drive sources for moving the first and second movable lens units in a direction parallel to an optical axis, respectively; guide members for each retaining the first and second movable lens units and for guiding movements of the first and second movable lens units; and a reference position detector for detecting reference positions for the first and second movable lens units, in which: the reference position detector has light emitting receiving elements; the first and second movable lens units have sleeves each engaged with the guide members and have light blocking portions for detecting the reference positions by the light emitting and receiving elements of the reference position detector; and the first and second lens units can move in the optical axis direction, with their respective light blocking portions passing each other without any interference.

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Utsunomiya, Japan

Tomoki Hasegawa