Abstract: An adjustment mechanism configured to adjust a reference position of an optical axis of a projection lens of a lens unit has a reference axis perpendicular to the optical axis and disposed in a plane which intersects with a focal point of the projection lens. The lens unit moves in an extension direction of the reference axis in accordance with rotation of a second screw. An acting point of a force to move the lens unit is disposed in a plane formed by the optical axis and the reference axis.

Abstract: An adjustment mechanism configured to adjust a reference position of an optical axis of a projection lens of a lens unit has a reference axis perpendicular to the optical axis and disposed in a plane which intersects with a focal point of the projection lens. The lens unit moves in an extension direction of the reference axis in accordance with rotation of a second screw. An acting point of a force to move the lens unit is disposed in a plane formed by the optical axis and the reference axis.

Abstract: An adjustment mechanism configured to adjust a reference position of an optical axis of a projection lens of a lens unit has a reference axis perpendicular to the optical axis and disposed in a plane which intersects with a focal point of the projection lens. The lens unit moves in an extension direction of the reference axis in accordance with rotation of a second screw. An acting point of a force to move the lens unit is disposed in a plane formed by the optical axis and the reference axis.

Abstract: An adjustment mechanism configured to adjust a reference position of an optical axis of a projection lens of a lens unit has a reference axis perpendicular to the optical axis and disposed in a plane which intersects with a focal point of the projection lens. The lens unit moves in an extension direction of the reference axis in accordance with rotation of a second screw. An acting point of a force to move the lens unit is disposed in a plane formed by the optical axis and the reference axis.

Abstract: A back cover (16) is attached to a cover mounting portion (5) of a lamp body (2) defining a lamp chamber (4) of a vehicle lamp (1). The back cover (16) is provided with a cover main body (19) to which a connection terminal (20) is partially embedded and a metallic case member (18) to which a circuit board (29, 30) is mounted. A seal groove (27) is formed on one of the cover main body (19) the case member (18). An elongated seal projection (18b) formed on the other of the cover main body (19) the case member (18). The elongated seal projection (18b) is fitted in the seal groove (27) and bonded to the seal groove (27), so that the elongated seal projection (18b) is fixed to the seal groove (27).

Abstract: A vehicle headlamp including a discharge lamp, which includes a light source, and a cap that holds the light source. The vehicle headlamp also includes a reflector, which includes a light reflecting part and a lamp holding part formed contiguously with one end of the light reflecting part. The vehicle headlamp also includes a socket connected to the cap, which supplies drive current to the lamp. The socket includes a case that holds a structure disposed therein, and a connection portion, which is connected to the cap and which protrudes toward the cap from an opposite surface of the case facing the cap. A conductive member is mounted on the lamp holding part to transmit noise generated when the lamp is turned on and a conducting portion is formed on the opposite surface of the case to surround the connection portion. The conductive member and the conducting portion are connected.

Abstract: A lighting device comprises a power circuit unit 23 that includes a plurality of power terminals 25 supplied with power from a power source, a plurality of harnesses 29 that supply power supplied to the power circuit unit to a discharge lamp, a terminal housing 43 that is made of a resin material, and includes a harness holding portion 48, one ends of the plurality of harnesses being disposed in the harness holding portion and a part of the plurality of harnesses being held in the harness holding portion, and a plurality of welding terminals 28 that includes portions disposed in the terminal housing and portions protruding outward from the terminal housing. One end portions of the plurality of welding terminals are connected to one end portions of the electric wires of the harnesses, respectively, and the other end portions of the plurality of welding terminals are connected to the power terminals of the power circuit unit by welding, respectively.

Abstract: A vehicle headlight is arranged to prevent moisture from entering into a lighting circuit and a lighting space. A back cover has a cover main body 19 fitted into a fitting portion 5 of a lamp body 2 and made of resin material and connection terminals 20 embedded in the cover main body (except a part of the terminals) and made of metal material and in which the cover main body and the connection terminals are molded integrally. Component inlaying portions in which electronic components that constitute a lighting circuit of a discharge lamp and are connected electrically to the connection terminals are inlaid respectively are provided to the cover main body. A part of the connection terminals protruding from the cover main body is formed as connector terminal portions of a power supply connector for supplying power to the discharge lamp.

Abstract: A lighting device comprises a power circuit unit 23 that includes a plurality of power terminals 25 supplied with power from a power source, a plurality of harnesses 29 that supply power supplied to the power circuit unit to a discharge lamp, a terminal housing 43 that is made of a resin material, and includes a harness holding portion 48, one ends of the plurality of harnesses being disposed in the harness holding portion and a part of the plurality of harnesses being held in the harness holding portion, and a plurality of welding terminals 28 that includes portions disposed in the terminal housing and portions protruding outward from the terminal housing. One end portions of the plurality of welding terminals are connected to one end portions of the electric wires of the harnesses, respectively, and the other end portions of the plurality of welding terminals are connected to the power terminals of the power circuit unit by welding, respectively.

Abstract: A back cover (16) is attached to a cover mounting portion (5) of a lamp body (2) defining a lamp chamber (4) of a vehicle lamp (1). The back cover (16) is provided with a cover main body (19) to which a connection terminal (20) is partially embedded and a metallic case member (18) to which a circuit board (29, 30) is mounted. A seal groove (27) is formed on one of the cover main body (19) the case member (18). An elongated seal projection (18b) formed on the other of the cover main body (19) the case member (18). The elongated seal projection (18b) is fitted in the seal groove (27) and bonded to the seal groove (27), so that the elongated seal projection (18b) is fixed to the seal groove (27).

Abstract: A vehicle headlamp including a discharge lamp, which includes a light source, and a cap that holds the light source. The vehicle headlamp also includes a reflector, which includes a light reflecting part and a lamp holding part formed contiguously with one end of the light reflecting part. The vehicle headlamp also includes a socket connected to the cap, which supplies drive current to the lamp. The socket includes a case that holds a structure disposed therein, and a connection portion, which is connected to the cap and which protrudes toward the cap from an opposite surface of the case facing the cap. A conductive member is mounted on the lamp holding part to transmit noise generated when the lamp is turned on and a conducting portion is formed on the opposite surface of the case to surround the connection portion. The conductive member and the conducting portion are connected.

Abstract: A socket includes a housing having a first housing portion and a second housing portion attachable to the first housing portion to cover the first housing portion, a starter transformer and accommodated inside the housing, a central terminal coupled to the starter transformer and disposed inside the housing such that, when the discharge lamp is attached to the socket, a central electrode of the discharge lamp contacts the central terminal. The first housing portion has a base, and a first wall portion extending from the base in a direction in which the discharge lamp is attached to the socket. The second housing portion has a second wall portion which, when the first and second housing portions are attached together, overlaps with the first wall portion such that the first and second wall portions surround the central terminal on an inner side of a peripheral edge of the base.

Abstract: A socket includes a housing having a first housing portion and a second housing portion attachable to the first housing portion to cover the first housing portion, a starter transformer and accommodated inside the housing, a central terminal coupled to the starter transformer and disposed inside the housing such that, when the discharge lamp is attached to the socket, a central electrode of the discharge lamp contacts the central terminal. The first housing portion has a base, and a first wall portion extending from the base in a direction in which the discharge lamp is attached to the socket. The second housing portion has a second wall portion which, when the first and second housing portions are attached together, overlaps with the first wall portion such that the first and second wall portions surround the central terminal on an inner side of a peripheral edge of the base.

Abstract: A vehicle headlight is arranged to prevent moisture from entering into a lighting circuit and a lighting space. A back cover has a cover main body 19 fitted into a fitting portion 5 of a lamp body 2 and made of resin material and connection terminals 20 embedded in the cover main body (except a part of the terminals) and made of metal material and in which the cover main body and the connection terminals are molded integrally. Component inlaying portions in which electronic components that constitute a lighting circuit of a discharge lamp and are connected electrically to the connection terminals are inlaid respectively are provided to the cover main body. A part of the connection terminals protruding from the cover main body is formed as connector terminal portions of a power supply connector for supplying power to the discharge lamp.

Abstract: A vehicle headlamp that includes a lamp body, a reflector which is tiltably supported by the lamp body, a discharge bulb which is fixed to the reflector, and a socket which is engaged with and attached to the discharge bulb and connects the discharge bulb to a lighting circuit. The lamp body is formed with an opening in its rear portion, and a cover that is attached in a removable fashion to the lamp body and closes the opening has a bar-shaped protrusion that is provided on the inner surface of cover; and when the cover is attached to the lamp body, the bar-shaped protrusion comes in contact with or is positioned near the socket and prevents the socket from rotating.

Abstract: A vehicle headlamp includes a reflector, a discharge bulb, a lighting circuit for supplying electric power to the discharge bulb, a socket coupled to the discharge bulb to connect the discharge bulb to the lighting circuit, an opening portion formed in a portion of a lamp body disposed rearwardly of the discharge bulb, and a cover for covering the opening portion. A power source-side connector and a bulb-side connector are fixedly secured to a portion of the lamp body disposed in the vicinity of the opening portion. The lighting circuit and an output connector for connection to the bulb-side connector are integrally formed on the cover. When the cover is moved to open the opening portion, the connection between the power source-side connector and the input connector and the connection between the bulb-side connector and the output connector are simultaneously interrupted.

Abstract: A vehicle headlamp includes a reflector, a discharge bulb, a lighting circuit for supplying electric power to the discharge bulb, a socket coupled to the discharge bulb to connect the discharge bulb to the lighting circuit, an opening portion formed in a portion of a lamp body disposed rearwardly of the discharge bulb, and a cover for covering the opening portion. A power source-side connector and a bulb-side connector are fixedly secured to a portion of the lamp body disposed in the vicinity of the opening portion. The lighting circuit and an output connector for connection to the bulb-side connector are integrally formed on the cover. When the cover is moved to open the opening portion, the connection between the power source-side connector and the input connector and the connection between the bulb-side connector and the output connector are simultaneously interrupted.