Electric lamp and discharge devices: systems – Special application – Vehicle
Reexamination Certificate
1999-11-01
2001-03-13
Philogene, Haissa (Department: 2821)
Electric lamp and discharge devices: systems
Special application
Vehicle
C315S057000, C315S282000, C361S743000, C361S836000, C361S722000
Reexamination Certificate
active
06201350
ABSTRACT:
CROSS REFERENCE TO RELATED APPLICATION
The present application relates to and incorporates herein by reference Japanese Patent Applications No. 10-331293 filed on Nov. 20, 1998 and No. 10-367412 filed on Dec. 24, 1998.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a discharge lamp lighting apparatus for driving a high voltage discharge lamp which may be used, for instance, as a front light of a vehicle, and a manufacturing method for the discharge lamp lighting apparatus.
2. Related Art
In a lighting apparatus (ballast) for a discharge lamp, a starter transformer is used to generate a high voltage at the time of starting to light the lamp. The high voltage causes a capacitive discharge between the electrodes of the lamp to generate an arc before the normal lighting operation.
In the above ballast, the starter transformer is accommodated within a transformer casing after its winding is connected to an output cable. The starter transformer is molded with an epoxy resin or the like for electrical insulation. The output cable is embedded in the starter transformer, requiring extra work in the ballast manufacturing process. Further, it is difficult to automate the ballast manufacturing process.
SUMMARY OF THE INVENTION
The present invention has an object to provide an improved discharge lamp lighting apparatus and an improved manufacturing method therefor.
According to a first aspect of the present invention, a connecting terminal is provided with its one end being connected to a high voltage terminal of a starter transformer and its other end being connected to an output cable. A connection part between the high voltage terminal of the starter transformer and the one end of the terminal is sealed in an electrically insulated manner with an insulating resin, thus eliminating embedding the output cable within the starter transformer.
According to a second aspect of the present invention, a ground connection part of a bus bar which is connectable to a ground side of an electric power source, a shielding member and a base member are constructed to be grounded at one location under a condition that a circuit unit is accommodated within the base member.
REFERENCES:
patent: 3872350 (1975-03-01), Powell et al.
patent: 5517171 (1996-05-01), Kotani et al.
patent: 5929745 (1999-07-01), Tsunezawa et al.
patent: 5959407 (1999-09-01), Ito et al.
patent: 6057650 (2000-05-01), Betz et al.
patent: 6066921 (2000-05-01), Nakamura et al.
Hiramatsu Hiromi
Horii Yasutoshi
Okuchi Hiroaki
Yamamoto Noboru
Denso Corporation
Nixon & Vanderhye P.C.
Philogene Haissa
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