Abstract: An optical device includes a photonic crystal main unit, an optical waveguide, an active region, an active substance, and a light source. The active region is formed in the optical waveguide and accommodates the liquid active substance formed with a four-level light-emitting material. For example, an accommodating unit formed in the active region is provided, and the active substance is accommodated in the accommodating unit. The active substance can be formed with an aqueous solution of a dye such as rhodamine, for example.

Abstract: A device connector includes a housing (20) with terminal supporting portions (30) projecting through a mounting hole (2) in a case (1) of a device. A flange (25) protrudes on the outer periphery of the housing (20) and faces a surface (2A) of the case (1) outward of the mounting hole (2). A surface packing (15) is mounted on the front surface of the flange (25) and is compressed between the front surface of the flange (25) and the case (1). A reinforcing portion (28) includes circumferentially spaced ribs (27) on the rear surface of the flange (25) and aligned in a front-back direction. A metal bracket (60) is fit externally fit on the housing (20). The bracket (60) presses the rear surface of the reinforcing portion (28) over the entire circumference and is bolt-fastened to an outer surface of the case (1).

Abstract: The present invention provides a connection unit capable of accommodating nuts and showing sealing ability in a state installed on a housing. A connection unit S includes: a terminal block 100 having holes h3 at one side of for accommodating nuts n; a terminal-connecting portions 200 at least partially exposed when viewed from the other side and fixed to the terminal block 100 with the circumferences of the terminal-connecting portions 200 in tight contact with the terminal block 100; and a nut cover 300 for covering the nuts accommodated in the holes h3 for preventing the nuts n from coming off. The connection unit S further includes: guide grooves and guide ribs for restricting movement of the nut cover 300 relative to the terminal block 100; and locking hooks 116 and locking holes h5 for restricting movement of the nut cover 300 relative to the terminal block 100.

Abstract: A device connector has a detachment preventing plate (50) mounted on surfaces of terminal blocks (30) to prevent detachment of nuts (35) and has escaping holes (52) at positions corresponding to nut accommodating holes (33) for allowing the tips of bolts (8) to escape. Fixed rails (40) are formed on the surface of each terminal block (30) at opposite sides of the nut accommodating hole (33) and extend in a projecting direction of the terminal block (30). Moving rails (53) are provided on a facing surface of the detachment preventing plate (50) and fit slidably to the fixed rails (40). The detachment preventing plate (50) is pushed and attached to cover the surfaces of the terminal blocks (30) from projecting ends of the terminal blocks (30) while the moving rails (53) are slid along and guided by the fixed rails (40).

Abstract: A device connector has a detachment preventing plate (50) mounted on surfaces of terminal blocks (30) to prevent detachment of nuts (35) and has escaping holes (52) at positions corresponding to nut accommodating holes (33) for allowing the tips of bolts (8) to escape. Fixed rails (40) are formed on the surface of each terminal block (30) at opposite sides of the nut accommodating hole (33) and extend in a projecting direction of the terminal block (30). Moving rails (53) are provided on a facing surface of the detachment preventing plate (50) and fit slidably to the fixed rails (40). The detachment preventing plate (50) is pushed and attached to cover the surfaces of the terminal blocks (30) from projecting ends of the terminal blocks (30) while the moving rails (53) are slid along and guided by the fixed rails (40).

Abstract: A device connector includes a housing (20) with terminal supporting portions (30) projecting through a mounting hole (2) in a case (1) of a device. A flange (25) protrudes on the outer periphery of the housing (20) and faces a surface (2A) of the case (1) outward of the mounting hole (2). A surface packing (15) is mounted on the front surface of the flange (25) and is compressed between the front surface of the flange (25) and the case (1). A reinforcing portion (28) includes circumferentially spaced ribs (27) on the rear surface of the flange (25) and aligned in a front-back direction. A metal bracket (60) is fit externally fit on the housing (20). The bracket (60) presses the rear surface of the reinforcing portion (28) over the entire circumference and is bolt-fastened to an outer surface of the case (1).

Abstract: The present invention provides a connection unit capable of accommodating nuts and showing sealing ability in a state installed on a housing. A connection unit S includes: a terminal block 100 having holes h3 at one side of for accommodating nuts n; a terminal-connecting portions 200 at least partially exposed when viewed from the other side and fixed to the terminal block 100 with the circumferences of the terminal-connecting portions 200 in tight contact with the terminal block 100; and a nut cover 300 for covering the nuts accommodated in the holes h3 for preventing the nuts n from coming off. The connection unit S further includes: guide grooves and guide ribs for restricting movement of the nut cover 300 relative to the terminal block 100; and locking hooks 116 and locking holes h5 for restricting movement of the nut cover 300 relative to the terminal block 100.