Abstract: A lens barrel includes a barrel body, an optical system disposed inside the barrel body, a zoom motor, a focus motor, a zoom lever switch disposed on the outer circumference of the barrel body and configured to transmit a user's operation instruction to the zoom motor, and a focus lever switch disposed on the outer circumference of the barrel body and configured to transmit a user's operation instruction to the focus motor. The zoom lever switch and the focus lever switch are arranged in a region formed of first and fourth quadrants of the lens barrel.

Abstract: In a conventional headphone set, there is a possibility that a headband cannot be put in a suitable position when an ear pad is snugly mounted on an ear. A headphone set of this disclosure includes speaker units which output a sound. The headphone set also includes: speaker housings which are brought into contact with a user; connecting portions which are connected to the speaker housings in a state where the speaker housings are movable in a forward and rearward direction of the user; and a headband which has connecting portions on end portions thereof and is mounted on a head of the user in directions toward a crown of the head of the user. Due to such a constitution, the headphone set can be used in a more stable manner.

Abstract: In a conventional headphone set, there is a possibility that a headband cannot be put in a suitable position when an ear pad is snugly mounted on an ear. A headphone set of this disclosure includes speaker units which output a sound. The headphone set also includes: speaker housings which are brought into contact with a user; connecting portions which are connected to the speaker housings in a state where the speaker housings are movable in a forward and rearward direction of the user; and a headband which has connecting portions on end portions thereof and is mounted on a head of the user in directions toward a crown of the head of the user. Due to such a constitution, the headphone set can be used in a more stable manner.

Abstract: A projection image display device 1 includes a housing 100, a projection lens 110, a front convex portion 50A and a rear convex portion 50B. The housing 100 accommodates an illumination optical system and a modulation optical system in an interior thereof. The projection lens 110 is configured to project an image modulated by the modulation optical system in a scaled-up size, and is disposed on a first lateral face 100b of the housing 100. The front convex portion 50A and the rear convex portion 50B are disposed on an intersection line between a plane containing an optical axis of the projection lens 110 and a top face 110a of the housing 100.

Abstract: A lens barrel includes a barrel body, an optical system disposed inside the barrel body, a zoom motor, a focus motor, a zoom lever switch disposed on the outer circumference of the barrel body and configured to transmit a user's operation instruction to the zoom motor, and a focus lever switch disposed on the outer circumference of the barrel body and configured to transmit a user's operation instruction to the focus motor. The zoom lever switch and the focus lever switch are arranged in a region formed of first and fourth quadrants of the lens barrel.

Abstract: A transportation management system comprises a management terminal device provided in a transportation medium and a management body device for remotely managing the transportation state of a transportation object. The management terminal device comprises a position detecting device, a get-on/off detecting device and a transportation information transmitter, which respectively, detects the current position of the transportation medium, detects the delivery-in/out of the transportation object to/from the transportation medium, and transmits transportation information to the management body device.

Abstract: A disc cartridge stores a disc that has a first side with a first functional portion and a second side. The disc cartridge includes: a cartridge body including a disc storage portion, a chucking opening and a head opening, where the disc storage portion has a disc window and a bottom and stores the disc therein so that the first side thereof is exposed through the disc window; the chucking opening is provided on the bottom of the disc storage portion so as to get the disc chucked externally; and the head opening is also provided on the bottom of the disc storage portion so as to allow a head, which reads and/or writes data from/on the second side of the disc, to access the second side; a shutter, supported to, and movable with respect to, the cartridge body so as to expose or cover at least the head opening; and a second functional portion, which is provided for the cartridge body and which produces an audiovisual effect by cooperating with the first functional portion of the disc.

Abstract: A memory card installer, comprising a main body having such a shape that can be installed on a memory card installation part provided on a device allowing a memory card to be connected thereto, an installation part allowing a plurality of memory cards to be installed thereto, device side input and output terminals connected electrically to a device side in such a state that the main body is installed on the memory card installation part, a plurality of memory card side input and output terminals connected electrically to each of the memory cards installed in the installation part, and a connection switching part switching the connection of each of the memory card side input and output terminals to the device side input and output terminals.

Abstract: A transportation management system comprises a management terminal device provided in a transportation medium and a management body device for remotely managing the transportation state of a transportation object. The management terminal device comprises a position detecting device, a get-on/off detecting device and a transportation information transmitter, which respectively, detects the current position of the transportation medium, detects the delivery-in/out of the transportation object to/from the transportation medium, and transmits transportation information to the management body device.