Abstract: A socket includes a main body section, a terminal provided in the main body section and assuming a cylindrical shape, a lead wire being welded to an end face provided at one end portion of the terminal, and an insulating section provided on the inside of the terminal, including a hole section through which the lead wire is inserted, and containing resin. When the cross sectional dimension of the lead wire is represented as W and the opening dimension of the hole section on the end face side is represented as “a”, the socket satisfies the following expression: 1.5 W?a?2.5 W.

Abstract: According to one embodiment, a socket includes a main body section, a terminal provided in the main body section and assuming a cylindrical shape, a lead wire being welded to an end face provided at one end portion of the terminal, and an insulating section provided on the inside of the terminal, including a hole section through which the lead wire is inserted, and containing resin. When the cross sectional dimension of the lead wire is represented as W and the opening dimension of the hole section on the end face side is represented as “a”, the socket satisfies the following expression: 1.5 W?a?2.

Abstract: There is provided a discharge lamp of an embodiment includes a burner having a light emitting part, and a disk-shaped flange which is capable of holding the burner so that the light emitting part is positioned at a front end side of the flange. The flange includes a resin part formed at an edge of the flange, and a metal part formed to be embedded in the resin part.

Abstract: There is provided a discharge lamp of an embodiment includes a burner having a light emitting part, and a disk-shaped flange which is capable of holding the burner so that the light emitting part is positioned at a front end side of the flange. The flange includes a resin part formed at an edge of the flange, and a metal part formed to be embedded in the resin part.

Abstract: A mercury-free vehicle discharge lamp is described as including a discharge space with electrodes, wherein a spherical length b, which is a length in a tube axial direction of the light emitting part is 7.5 mm to 8.5 mm and a thickness volume V of the light emitting part is 50 mm3 to 100 mm3, and wherein the following formula is satisfied: ?20?(a?35)×5.5+(x?13.5)×10 +(1.85?t)×100+(2.5?d)×100?20, a: power W supplied in a stable lighting time, x: pressure [atm] of rare gas sealed in the discharge space ranging 10˜17 atm, t: thickness [mm] of a part where a wall with maximum thickness and ranging 1.30˜1.85 mm, and d: inner diameter [mm] of a part where the wall with maximum thickness.

Abstract: A discharge lamp includes an airtight tube including a light-emitting unit in which a space is formed and seal portions formed at least on one end of the light-emitting unit, a discharge medium including a metal halide and a rare gas sealed in the light-emitting unit, a metal foil sealed into the seal portion, and a pair of electrodes one ends of which are overlapped and connected to the metal foil and the other ends of which are provided such that they are led into the space of the light-emitting unit and arranged in opposition to each other. A concavity is formed on at least a portion of the back surface side of the metal foil on which the electrode is overlapped, and a compression distortion is formed on the seal portion in the vicinity of the concavity.

Abstract: A metal halide lamp (MHL) includes: a light-transmitting hermetic vessel made of quartz glass, including: a surrounding portion having a discharge space formed therein; and at least one sealing portion joined to the surrounding portion; electrodes sealed within the discharge space of the light-transmitting hermetic vessel; a discharge medium filled within the discharge space of the light-transmitting hermetic vessel; and at least one sealed metal foil connected to proximal ends of the electrodes and hermetically embedded within the sealing portion, the sealed metal foil being formed with height-differentiating portions comprised of laser traces on at least one of surfaces of the metal foil.

Abstract: Provided is a mercury-free vehicle discharge lamp that is stably lighted with a power of 18 to 30 W in a steady time. The lamp is defined in a light-emitting portion (11). A discharge medium including a metal halogen compound and a rare gas are sealed into the lamp. The lamp also has a discharge space in which electrodes (32) are disposed and satisfies the following equation. ?40?(a?35)×5.5+(x?13.5)×10+(1.85?t)×100+(2.

Abstract: Disclosed is a metal halide lamp, comprising an airtight tube having a discharge portion with a discharge space therein and a pair of sealing portions formed at both ends of the discharge portion; a discharge medium substantially free from mercury enclosed in the discharge space, the discharge medium including a rare gas and a metal halide, the metal halide including a scandium halide; metal foils sealed in the sealing portions; a pair of electrodes having one ends connected to the metal foils and the other ends arranged to face each other within the discharge space; and coils wound around the electrodes within the sealing portions, wherein the scandium halide has a weight ratio of not less than 30%, and the coils have an outer diameter R of not less than 0.45 mm but not more than 0.60 mm.

Abstract: A discharge lamp includes an airtight tube including a light-emitting unit in which a space is formed and seal portions formed at least on one end of the light-emitting unit, a discharge medium including a metal halide and a rare gas sealed in the light-emitting unit, a metal foil sealed into the seal portion, and a pair of electrodes one ends of which are overlapped and connected to the metal foil and the other ends of which are provided such that they are led into the space of the light-emitting unit and arranged in opposition to each other. A concavity is formed on at least a portion of the back surface side of the metal foil on which the electrode is overlapped, and a compression distortion is formed on the seal portion in the vicinity of the concavity.

Abstract: It is aimed at providing a metal halide lamp including sealed metal foils embedded within sealing portions, each metal foil having surfaces formed with height differences thereon, thereby restricting occurrence of crack leaks in the sealing portions.

Abstract: A foil sealed lamp including an airtight container including a discharge portion provided thereinside with a discharge space and seal parts disposed at both ends of the discharge portion; metal foils of thickness T (?m) hermetically attached to the seal portions; a pair of electrodes each having its one end connected to the metal foil and having its other end led out to the discharge space; and on the periphery of areas of connection of the metal foils with the pair of electrodes, multiple recessed portions satisfying 1.0 (?m)?D?T (?m) wherein D refers to the depth (?m), in a manner that the recessed portions do not overlap one another.