Abstract: A drum member includes: a substantially cylindrical drum body having a hollow part extending in an axial direction; a sheet member wound on the drum body; an adjusting mechanism configured to adjust tension in the sheet member, the adjusting mechanism including a moving member that holds an end of the sheet member in a circumferential direction and moves in a depth direction of the hollow part, and a fixing member that fixes the moving member to the drum body; and one or more positioning members that position the moving member such that the moving member does not move in the circumferential direction of the drum body when the moving member is fixed with the fixing member.

Abstract: Provided is an image forming apparatus including: an annular transfer belt having an outer surface on which an image is transferred; a transferring unit including a transfer cylinder having a transfer area that sandwiches a recording medium with the outer surface of the transfer belt to transfer the image from the outer surface of the transfer belt to the recording medium, and a pair of first rotating bodies disposed on both axial end sides of the transfer cylinder; a pair of circulating members each being wound around the first rotating body and being circulated by rotation of the first rotating bodies; and a holding unit attached to the circulating members, the holding unit configured to hold the recording medium, transport the recording medium with circulation of the circulating members, and pass the recording medium through the transfer area.

Abstract: A transfer device includes: a transfer member to which a voltage is applied by a power supply device to generate a transfer electric field for transferring a developer image to a recording medium; a transfer cylinder having a recess in which a retaining member that retains a leading end portion of the recording medium is disposed, the transfer electric field being generated between the transfer cylinder and the transfer member at a transfer position; a shunt circuit by which the voltage applied to the transfer member is shunted to a reference potential point; and an operation stopping mechanism that starts and stops an operation of the shunt circuit in response to rotation of the transfer cylinder, the operation being started when the recess reaches the transfer position and stopped when the recess leaves the transfer position.

Abstract: An optical member driving device, including: a sensor substrate to which an image sensor is fixed; a first slider fixed to the sensor substrate; a second slider slidable along a first direction orthogonal to an optical axis direction; and a third slider which is fixed to a lens unit which includes, and is slidable along a second direction, wherein any one of the first slider and the second slider has a first projecting member extending along the first direction, and another one of the first slider and the second slider has a first groove that is to fit over the first projecting member, and wherein any one of the second slider and the third slider has a second projecting member extending along the second direction, and another one of the second slider and the third slider has a second groove that is to fit over the second projecting member.

Abstract: A lens driving device, includes: a fixing portion; a lens support; a first slider; a second slider held by the first slider so as to be slidable in a first direction; and a third slider which is provided on the lens support, and is held by the second slider so as to be slidable in a second direction, wherein any one of the first slider and the second slider has a first projecting member extending along the first direction, and another one of the first slider and the second slider has a first groove that is to fit aver the first projecting member, and wherein any one of the second slider and the third slider has a second projecting member extending along the second direction, and another one of the second slider and the third slider has a second groove that is to fit over the second projecting member.

Abstract: A lens driving device, a camera device, and an electronic apparatus are provided that include a base not susceptible to thermal deformation. A lens driving device includes a movable body including a lens support body, and a base configured to support the movable body so as to be able to move in an optical axis direction of a lens. The base includes a base body formed from a resin and having a rectangular plate shape when viewed along the optical axis direction of the lens, and a ring shaped metal member embedded in the base body. The metal member is formed with a projecting portion facing outward at each side of a rectangular shape and exposed from the base body.

Abstract: A lens driving device being capable of securing smooth movement of a lens support body includes a guide mechanism. The guide mechanism includes a guide groove and a guide projection for fitting into the guide groove so as to be able to slide. The guide groove includes a bottom face formed in a planar shape. In an XYZ orthogonal coordinate system wherein a sliding direction is an X direction and a height direction is a Z direction, the guide projection includes a Z direction end face opposing the guide groove bottom face. A cross-section profile of the Z direction end face sectioned along an XZ plane is formed with a curved shape convex on the guide groove bottom face side, and a cross-section profile of the Z direction end face sectioned along a YZ plane is formed with a curved shape convex on the guide groove bottom face side.

Abstract: A lens driving device, a camera device, and an electronic apparatus are provided in which variation is not liable to occur in a friction coefficient of a guide mechanism. A lens driving device 12 includes a guide mechanism 38 configured to guide movement of a lens. The guide mechanism 38 includes a first member formed with guide projections 44, 48 and a second member conned with guide grooves 46, 50 in which the guide projections slide. At least one out of the first member or the second member is configured from a resin composition resulting from mixing a liquid crystal polymer together with a fluororesin. A fluororesin layer is provided to at least one surface of the guide projections or the guide grooves formed to at least the first member or the second member configured from the resin composition.

Abstract: A lens driving device includes a movable body including a lens support body and a fixed body for supporting the movable body so as to be able to move in an optical axis direction of a lens. The fixed body includes a through hole, and an opposing face is formed at a periphery of the through hole in a direction orthogonal to the optical axis direction and opposing the movable body. The opposing face has a protrusion protruding toward the movable body side at a peripheral edge of the through hole, and a recess at a periphery of the protrusion and recessed toward the movable body side. The movable body includes an opening to let light from the lens pass through and a flat face formed at a periphery of the opening in a direction orthogonal to the optical axis direction and disposed opposing the protrusion and the recess.

Abstract: A transfer device includes: a transfer member to which a voltage is applied by a power supply device to generate a transfer electric field for transferring a developer image to a recording medium; a transfer cylinder having a recess in which a retaining member that retains a leading end portion of the recording medium is disposed, the transfer electric field being generated between the transfer cylinder and the transfer member at a transfer position; a shunt circuit by which the voltage applied to the transfer member is shunted to a reference potential point; and an operation stopping mechanism that starts and stops an operation of the shunt circuit in response to rotation of the transfer cylinder, the operation being started when the recess reaches the transfer position and stopped when the recess leaves the transfer position.

Abstract: A jacket includes: a first layer that is on a cylinder body side when the jacket is attached to a rotating cylinder body; and a second layer that is a layer located on a side opposite to the cylinder body with respect to the first layer, has a hardness lower than that of the first layer, and does not exist at a position where at least one of end edges of the cylinder body in a rotation axis direction is located inward of the first layer in the rotation axis direction.

Abstract: An image forming apparatus includes: a rotating body; a sprocket provided coaxially with the rotating body, the sprocket being configured to rotate integrally with the rotating body; a chain including a holder configured to hold a leading end portion of a recording medium, the chain being wound on the sprocket, the chain being configured to rotate so as to transport the recording medium; an annular shaped transfer belt supported by an opposing member opposing the rotating body at an opposing position, the transfer belt being configured to sandwich the recording medium transported by the chain between the transfer belt and the rotating body at the opposing position, in which an image on an outer peripheral surface of the transfer belt is transferred to the recording medium in response to a transfer bias being applied between the rotating body and the opposing member; and a forming member that supports the transfer belt on an upstream side of the opposing position in a transport direction, the forming member be

Abstract: An image forming apparatus includes: a rotating body; a sprocket provided coaxially with the rotating body, the sprocket being configured to rotate integrally with the rotating body; a chain including a holder configured to hold a leading end portion of a recording medium, the chain being wound on the sprocket, the chain being configured to rotate so as to transport the recording medium; an annular shaped transfer belt supported by an opposing member opposing the rotating body at an opposing position, the transfer belt being configured to sandwich the recording medium transported by the chain between the transfer belt and the rotating body at the opposing position, in which an image on an outer peripheral surface of the transfer belt is transferred to the recording medium in response to a transfer bias being applied between the rotating body and the opposing member; and a forming member that supports the transfer belt on an upstream side of the opposing position in a transport direction, the forming member be

Abstract: A cylinder member includes: a cylinder body having a cylindrical shape; a sheet member wound on the cylinder body; a first attachment portion provided at one end portion of the sheet member in a circumferential direction, the first attachment portion being detachably attached to the cylinder body; and a second attachment portion provided at the other end portion of the sheet member in the circumferential direction, the second attachment portion being detachably attached to the cylinder body.

Abstract: A transfer member includes: an inner layer; an outer layer provided on an outer periphery of the inner layer; and a surface layer provided on an outer periphery of the outer layer, both end portions of the surface layer in circumferential directions extending in the circumferential directions from both end portions of the outer layer in the circumferential directions.

Abstract: A transfer member includes: an inner layer; and an outer layer that is adhered to the inner layer and has a hardness lower than a hardness of the inner layer.

Abstract: A lens driving device being capable of stabilizing a motion of a lens holder is provided. A lens driving device includes a lens holder configured to support a lens, a frame surrounding a periphery of the lens holder, and a support mechanism configured to support the lens holder so as to be freely movable relative to the frame in an optical axis direction of the lens. The support mechanism includes a support member provided in the frame and a guide portion provided in the lens holder. The support member extends in the optical axis direction of the lens, and the support member is in contact with the guide portion at least at two points in a cross section orthogonal to the optical axis direction of the lens.

Abstract: Provided are a lens driving device, a camera device, and an electronic apparatus capable of suppressing an inclination of a guiding shaft. The lens driving device includes: a base including a bottom surface portion; a guiding shaft provided perpendicularly to the bottom surface portion of the base and a lens support guided by the guiding shaft. The base includes a base main body, and a support plate, which is made of a metal, and is provided in the base main body. One end of the guiding shaft is fixed to the support plate.

Abstract: A lens driving device, a camera device, and an electronic apparatus, which are capable of ensuring smooth movement of a lens support wherein the lens driving device includes: a lens support; a frame member; and a guide mechanism configured to guide the lens support in such a manner that the lens support is freely movable in a direction orthogonal to an optical axis direction of the lens relative to a predetermined member forming the frame member. The guide mechanism includes, on each of one side and another side in a direction orthogonal to a moving direction of the lens support: a guide protrusion which extends along the moving direction of the lens support, and protrudes in the optical axis direction; and a guide groove formed in such a manner as to recess in the optical axis direction to allow the guide protrusion to be fitted to the guide groove.

Abstract: A lens driving device includes a movable body for supporting a lens, a fixed body disposed inside the movable body, a guide mechanism configured to guide the movable body with respect to the fixed body to be movable in an optical axis direction of the lens, and a driving mechanism configured to move the movable body in the optical axis direction with respect to the fixed body. The driving mechanism includes a magnet disposed on one out of the movable body or the fixed body, and a coil and a magnetic member disposed on the other out of the movable body or the fixed body so as to oppose the magnet, with the magnetic member disposed parallel to the coil. The movable body is pressed against the guide mechanism and toward the fixed body by the magnet and the magnetic member. An opening is formed in the magnetic member.