Abstract: 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.

Abstract: Provided are an electrophotographic photoconductor being resistant to abrasion even in long-term use, having highly sensitive electric characteristics, being capable of maintaining a high retention rate, and being capable of providing a stable image without filming, a method of manufacturing the same, and an electrophotographic device. The photoconductor includes an electroconductive substrate (1), a charge generation layer (3), and a charge transport layer (4); the charge transport layer contains a hole transport material, a resin binder, an electron transport material, and an inorganic oxide; the charge generation layer contains a charge generation material; the masses of the hole transport material, the resin binder, the electron transport material, and the inorganic oxide in the charge transport layer respectively denoted by a to d satisfy 1.5?b/a?5.7, 0.005?c/a?0.35, 0.05?d/a?0.70, a?c+d, and c/d?0.

Abstract: An electrophotographic photoreceptor includes a conductive substrate and a photosensitive layer containing a charge transport portion including a first hole transport material represented by General Formula (1) below, a cured resin, and a cross-linked structure there between: where Za is a polymerizable functional group with a Structural Formula (2), (3), or (4), Zb is a divalent group with a Structural Formula (6) or (7), Ra, Rb, Rc and Rd each are one of a branched or unbranched alkyl group having from 1 to 6 carbon atoms, an alkoxy group having from 1 to 6 carbon atoms, a substituted or unsubstituted phenyl group, or a substituted or unsubstituted styryl group, I is 0 or 1 when Za is (2) or (4) and 1 when Za is (3), m is from 0 to 5, n, o, and p are each from 0 to 4, q is from 1 to 3.

Abstract: Provided are an electrophotographic photoconductor being resistant to abrasion even in long-term use, having highly sensitive electric characteristics, being capable of maintaining a high retention rate, and being capable of providing a stable image without filming, a method of manufacturing the same, and an electrophotographic device. The photoconductor includes an electroconductive substrate (1), a charge generation layer (3), and a charge transport layer (4); the charge transport layer contains a hole transport material, a resin binder, an electron transport material, and an inorganic oxide; the charge generation layer contains a charge generation material; the masses of the hole transport material, the resin binder, the electron transport material, and the inorganic oxide in the charge transport layer respectively denoted by a to d satisfy 1.5?b/a?5.7, 0.005?c/a?0.35, 0.05?d/a?0.70, a?c+d, and c/d?0.

Abstract: 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.

Abstract: An electrophotographic photoconductor includes a conductive substrate; and a photosensitive layer provided on the conductive substrate and containing a charge generation material, a hole transport material, a first electron transport material, from 3% by mass to 40% by mass of a second electron transport material, a resin binder, and an inorganic oxide filler surface-treated with a silane coupling agent. In a dipole-dipole force component (a Hansen solubility parameter), the first electron transport material and the silane coupling agent have a difference of ?SPa<2.50; the second electron transport material and the silane coupling agent have a difference of ?SPb<2.50; and the first electron transport material and the second electron transport material have a difference of 0.30<?SPc<1.00. In a London dispersion force component (a Hansen solubility parameter), the resin binder and the silane coupling agent have a difference of ?SPd<2.00.

Abstract: An electrophotographic photoreceptor includes an electroconductive substrate; and a photosensitive layer that is formed on the electroconductive substrate and that contains an inorganic oxide and a lubricant resin which contains a polycarbonate resin having a siloxane structure therein or a polyarylate resin having a siloxane structure therein. When light having a wavelength of 780 nm is irradiated onto a slurry containing 20% by mass of the inorganic oxide in a predetermined solvent to provide an inorganic oxide slurry, the inorganic oxide slurry has a light transmittance that is 80% or more. The photosensitive layer may be a negatively-charged laminate-type photosensitive layer, a monolayer type photosensitive layer, or a positively-charged laminate-type photosensitive layer. The electrophotographic photoreceptor is less worn upon long-term use, allows no filming, and can realize stable images.

Abstract: An electrophotographic photoreceptor includes a conductive substrate and a photosensitive layer formed on the conductive substrate. The photosensitive layer contains a cross-linked structure derived from a first hole transport material represented by the following general formula (1): Za is a polymerizable functional group with structural formula (2), (3), or (4), Zb is a divalent group with structural formula (5), (6), or (7), Ra, Rb, Rc and Rd each are one of a branched or unbranched alkyl group having from 1 to 6 carbon atoms, an alkoxy group having from 1 to 6 carbon atoms, a substituted or unsubstituted phenyl group, or a substituted or unsubstituted styryl group, l is an integer of 0 or 1, m is an integer from 0 to 5, n, o, and p are each integer from 0 to 4, q is an integer from 1 to 3.

Abstract: An electrophotographic photoconductor includes a conductive substrate; and a photosensitive layer provided on the conductive substrate and containing a charge generation material, a hole transport material, a first electron transport material, from 3% by mass to 40% by mass of a second electron transport material, a resin binder, and an inorganic oxide filler surface-treated with a silane coupling agent. In a dipole-dipole force component (a Hansen solubility parameter), the first electron transport material and the silane coupling agent have a difference of ?SPa<2.50; the second electron transport material and the silane coupling agent have a difference of ?SPb<2.50; and the first electron transport material and the second electron transport material have a difference of 0.30<?SPc<1.00. In a London dispersion force component (a Hansen solubility parameter), the resin binder and the silane coupling agent have a difference of ?SPd<2.00.

Abstract: An electrophotographic photoreceptor includes an electroconductive substrate; and a photosensitive layer that is formed on the electroconductive substrate and that contains an inorganic oxide and a lubricant resin. When light having a wavelength of 780 nm is irradiated onto a slurry containing 20% by mass of the inorganic oxide in a predetermined solvent to provide an inorganic oxide slurry, the inorganic oxide slurry has a luminous transmittance that is 40% or more. The photosensitive layer may be a negatively-charged laminate-type photosensitive layer, a monolayer type photosensitive layer, or a positively-charged laminate-type photosensitive layer. The electrophotographic photoreceptor is less worn upon long-term use, allows no filming, and can realize stable images. A method for producing the electrophotographic photoreceptor and an electrophotographic apparatus including the electrophotographic photoreceptor are disclosed.

Abstract: 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.

Abstract: 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.

Abstract: The invention provides an electrophotographic photoreceptor, which undergoes little abrasion over long term use and is able to develop a stable image, as well as a method of producing the same and an electrophotographic device including the same. The electrophotographic photoreceptor includes a conductive substrate; and a photosensitive layer that contains an inorganic oxide and that is formed on the conductive substrate from a coating liquid. A test slurry containing 20% by mass of the inorganic oxide dispersed in a solvent for forming the coating liquid has a light transmittance of 40% or more in a test case where light having a wavelength of 780 nm irradiates the test slurry.

Abstract: A method of producing an electrophotographic photoreceptor composed of a photosensitive layer provided on a conductive substrate, includes, in the formation of an outermost layer, controlling slope k of a straight line obtained by plotting the average film density of outermost layer and boiling point of solvent used for the formation of the outermost layer along the ordinate and the abscissa, respectively, to be 1.50E-4 (g/cm3·° C.) or greater, and adjusting the difference in film density of the outermost layer between the surface side and the side close to the conductive substrate to be 0.030 g/cm3 or less. The electrophotographic photoreceptor has reduced image defects even after long-term use and has excellent wear performance.

Abstract: 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.

Abstract: 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.

Abstract: A photoreceptor for electrophotography and an electrophotography device having the same reduces wear loss of the photoreceptor surface and stably obtaining a favorable image for long time. The photoreceptor for electrophotography includes a conductive substrate and a charge transport layer provided on the conductive substrate. The charge transport layer contains a charge transport material, a resin binder, and an inorganic oxide filler surface-treated with a silane coupling agent. A difference (?SPa) in a dipole-dipole force component that is a Hansen solubility parameter between the charge transport material and the silane coupling agent satisfies a relationship ?SPa<1.0. A difference (?SPb) in a London dispersion force component that is a Hansen solubility parameter between the resin binder and the silane coupling agent satisfies a relationship ?SPb<2.5.

Abstract: A resin composition including a lignin skeleton capable of producing a heat-resistant molded article and being decomposed under relatively mild conditions. The resin composition contains a lignin skeleton including, as a base component, a phenolated lignin or a derivative thereof that contains a reactive monomer group, the phenolated lignin containing a phenol-containing monomer represented by the following general formula (I): wherein R1 to R5 are each independently a monovalent group selected from H, OH, a C1 to C6 alkyl group, a C1 to C6 alkoxy group, and a C6 to C10 aryl group, or adjacent substituents among R1 to R5 form a substituted or unsubstituted aromatic ring together, at least one of R1 and R2 is a hydroxyl group, and R6 is OCH3 or H; a molded article thereof, as well as a recycling method for a molded article formed in a mold formed of the resin composition.

Abstract: The invention provides an electrophotographic photoreceptor, which undergoes little abrasion over long term use and is able to develop a stable image, as well as a method of producing the same and an electrophotographic device including the same. The electrophotographic photoreceptor includes a conductive substrate; and a photosensitive layer that contains an inorganic oxide and that is formed on the conductive substrate from a coating liquid. A test slurry containing 20% by mass of the inorganic oxide dispersed in a solvent for forming the coating liquid has a light transmittance of 40% or more in a test case where light having a wavelength of 780 nm irradiates the test slurry.

Abstract: An electrophotographic photoreceptor causing no image defect even in long-term use and has excellent wear performance, a method of producing the same, and an electrophotographic device are provided. The electrophotographic photoreceptor includes a photosensitive layer on a conductive substrate. The slope k of a straight line obtained by plotting the average film density of outermost layer and the boiling point of solvent used for the formation of the outermost layer along the ordinate and the abscissa, respectively, is 1.50E-4 (g/cm3·° C.) or greater, and the difference in film density of the outermost layer between the surface side and the side close to the conductive substrate is 0.030 g/cm3 or less.