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    • 43. 发明专利
    • HALOGEN LAMP
    • JPH11329371A
    • 1999-11-30
    • JP13300998
    • 1998-05-15
    • MATSUSHITA ELECTRONICS CORP
    • IKEDA HIROSHIMAEDA KAZUO
    • H01K1/40H01K1/66
    • PROBLEM TO BE SOLVED: To provide a safe halogen lamp wherein the breakage of its arc tube never occurs even if arc discharge is generated resulting from the disconnection of its filament coil. SOLUTION: This halogen lamp is equipped with: an arc tube 1 composed of a light emitting part 5 wherein a closing part 2, a swelled part 3 and a cylindrical part 4 are continuously formed in that order and a sealing part 6 continuously formed on the cylindrical part 4; and a base 7 fixed to the sealing part 6. A filament coil 9 is arranged in the light emitting part 5, two inner introducing wires 10, 11, introducing foil pieces 12, 13, and outer introducing wires 14, 15 are sequentially connected to both ends of the filament coil 9, and the one outer introducing wire 14 out of the outer introducing wires 14, 15 is connected to the base 7 through a fuse 17. The other outer introducing wire 15 is directly connected to the base 7. The wire diameters of parts 19, 20 of the inner introducing wires 10, 11 located in the sealing part 6 are set smaller than the wire diameters of the inner introducing wires 10, 11 located in the light emitting part 5 by being bounded by the cylindrical part 4 and the sealing part 6.
    • 45. 发明专利
    • TUNGSTEN HALOGEN LAMP
    • JPH087846A
    • 1996-01-12
    • JP16079394
    • 1994-06-21
    • USHIO ELECTRIC INC
    • TAKEUCHI ICHIRO
    • H01K1/16H01K1/40H01K1/66
    • PURPOSE:To simplify the structure, to make the manufacture easier, and to obtain a fuse function, by making the value D/d at a value within a specific range, where the size of a tungsten wire having the filament support function is denoted dmm, and the diameter of an inner lead member is denoted Dmm. CONSTITUTION:As a filament, a tungsten wire with the diameter about 0.14mm, for example, is used, and it is formed in a double coil with the outer diameter about 3.6 to 4.0mm in the bulk volume, and the length 8mm. As an inner lead member, a tungsten wire with the diameter 0.28mm, for example, is used, and the second inner lead member 7 at the longer side runs parallel and close to the filament 8. As a result, the ratio D/d of the diameter Dmm of the inner lead member, and the size dmm of the tungsten wire is made into 2, which is within the scope of the specified value 1.8 to 2.1. Consequently, a halogen bulb for optical apparatus which is of a simple structure, can be manufactured easily, and has a fuse function, can be obtained.