Oki Electric Industry Co., Ltd.

A developer storage body includes a frame body that stores a developer, and a rotating member a part of which is inserted into a hole portion provided in the frame body. The rotating member agitates or conveys the developer in the frame body. A seal member is held between the frame body and the rotating member in a direction of a rotation axis of the rotating member. The frame body has a contact surface in contact with the seal member. The contact surface has a first contact region in which a plurality of holes are formed and arranged in a circumferential direction, and first contact portions are each formed between two of the plurality of holes adjacent to each other.

A medium transport apparatus includes an apparatus body provided with a medium transport path, first and second components disposed in the apparatus body, a first cover covering a first area in which the first component is housed, a second cover covering a second area in which the second component is housed, a first coupling portion coupling both covers, and a second coupling portion coupling the apparatus body and the second cover. The second cover has a wall portion located between the first and second areas in a state where the first cover opened and the second cover are closed. In a state where the first cover is opened, the first component is attachable and detachable while the wall portion restricts access to the second area. In a state where the second cover is opened, the first component and the second component are attachable and detachable.

To make it possible to improve an accuracy of medium residual detection. A medium transaction device which includes a storage part that storages a medium, a vertically movable stage that is provided in the storage part and on which the medium is stacked, a conveyance roller that is provided on the upper side of the storage part to separate the medium stacked on the stage and convey the medium to a conveyance gate, a detector that detects whether or not the medium remains on the stage, a tongue piece roller with a tongue piece that knocks off the medium remaining at the conveyance gate, and a control unit that operates the tongue piece roller when the detector has not detected a residual of the medium.

An electronic structure includes: a substrate having a first surface; a functional element unit including a functional element having an electronic function, and a protector covering the functional element, the functional element unit having a second surface facing the first surface; a support disposed between the first surface and the second surface, the support supporting the second surface; and a projection disposed on a first surface side of the substrate, the projection projecting toward the functional element unit. The support has a third surface in contact with the second surface of the functional element unit, the third surface having an area smaller than an area of the second surface. The projection has a fourth surface in contact with or close to the functional element unit, the fourth surface having an area smaller than the area of the second surface, the projection being formed by a different material from the support.

A fixation device according to an embodiment includes: a belt member extending in a first direction; a cleaning member extending in the first direction and in contact with the belt member to clean the belt member; an opposing member extending in the first direction, and opposed to the cleaning member in a second direction across the belt member, to form a nip portion with the cleaning member; and a support member supporting the opposing member. The opposing member is configured, when the opposing member and the support member are removed from the fixation device, to be supported by the support member such that the opposing member is restricted from moving in the first direction and is movable in the second direction relative to the support member.

An image formation apparatus according to an embodiment includes: a conveyance belt configured to convey a medium supplied from a medium feeder toward a fixation device along a conveyance direction; an image transfer part configured to transfer an image formed on an image carrier at a transfer position to the medium being conveyed by the conveyance belt; and a flexible guide member that is provided upstream in the conveyance direction of the transfer position, and is arranged to approach the conveyance belt as the guide member extends downstream in the conveyance direction. The shortest distance from a guide member end, which is one of end portions of the guide member located closer to the conveyance belt than the other to the conveyance belt, to the conveyance belt is greater than a maximum medium thickness specified in the apparatus specifications of the image formation apparatus.

A communication apparatus according to one or more embodiments may include: a storage that stores MAC filtering registration information indicating a registered MAC address serving as a MAC address of a communication device which is allowed to perform communication and identification information of the communication device; a communication part configured to receive a communication packet from a network; a MAC filter processor configured to reference the MAC filtering registration information and perform filtering depending on whether or not a source MAC address of the communication packet matches the registered MAC address; and a MAC filter controller configured to use the identification information to update the registered MAC address.

A light emitting device includes: a first layer in which a first light emitting element is disposed; a second layer stacked on the first layer and including a second light emitting element that at least partially overlaps the first light emitting element as viewed in a light emitting direction perpendicular to a light emitting surface of the first light emitting element; and a control substrate on which the first layer is stacked and that controls light emission of the first light emitting element and the second light emitting element. The first layer includes a first surface facing the second layer in the light emitting direction, a second surface facing the control substrate in the light emitting direction, and a first opening formed from the first surface to the second surface. The second light emitting element and the control substrate are electrically connected together through the first opening.

A fixation device according to an embodiment may include: a first rotation member extending in a first direction; a plurality of cleaning members each of which includes an elastic body to clean the first rotation member; and a biasing mechanism that biases the plurality of cleaning members toward the first rotation member. The plurality of cleaning members includes: first and second cleaning members including first and second support bodies and first and second elastic bodies supported by the support bodies, respectively. In the first direction, a second contact area where the second elastic body contacts the first rotation member includes an overlapping region that overlap a first contact area where the first elastic body contacts the first rotation member. The bias mechanism includes a bias member that applies a biasing force to the first support body in a region different from the overlapping region in the first direction.

To achieve a highly efficient and power-saving communication network by switching between communication based on PtP connection and communication based on PtMP connection. In the optical communication system that includes a combination of PtP connection and PtMP connection according to the present invention, a ONU is switchable between a PtP connection transmission/reception mode and a PtMP connection transmission/reception mode and tune a wavelength to be used, the optical communication system includes an optical wavelength multiplexing/demultiplexing device between a core network and an ODN including the ONU, a predetermined number of first ports among a plurality of demultiplexing-side ports of the optical wavelength multiplexing/demultiplexing device are connected to the core network, a remaining second port is connected to a subscriber-side port of the OSU connected to the core network, and a control device instructs the optical terminal device in the optical communication system to switch a connection mode and the wavelength to be used by the ONU in response to change in communication traffic of a communication service.