Koito Seisakusho Co., Ltd.

Koito Manufacturing Company, Ltd.

Mitsuhiro Okano

Yasuo Hirozumi

Koichi Nakamura

Masakazu Nagasawa

Yasuyoshi Numajiri

Kiyoshi Yazaki

Susumu Kanematsu

Hitoshi Hemmi

Mikio Watanabe

A vehicular bulb with its front end coated with a glare-protection paint that contains silicon carbide (SiC) as its pigment substance. With this silicon carbide contained paint, the front end externally assumes a color that is substantially the same color as reflectors and is thus prevented from being easily recognized from the outside of a lighting fixture that is installed with such a bulb.

Bulb applied with a glare protection paint and a vehicular lighting fixture equipped therewith

An electric lamp assembly comprising a lamp bulb a lamp base being essentially formed of a synthetic resin material and a retaining band being made of a metal. A plurality of weldable supporting pieces formed of a metal are integrally formed on the lamp base by insert forming process with the front end portions of the supporting pieces projecting out of the front end portion of the lamp base. A plurality of mounting openings are formed in the retaining band. Respective front end portions of the supporting pieces are inserted through the mounting openings in the retaining band and are welded to edges of the mounting openings respectively.

Electric lamp assembly having a band connected to integrally formed

An electric lamp assembly is disclosed which comprises a bulb unit including a filament, lead lines extending from the filament to the outside of the bulb unit and a hermetic seal portion, the lead lines extending through the hermetic seal portion; a bulb holder including a looped band portion which gripps the hermetic seal portion of the bulb unit having leading ends of the lead lines projected outward from the bulb holder, the bulb holder having foot portions each being formed with at least one opening; and a base assembly including a circular body part, a pair of conducting plate members having leading ends projected outward from respective slits formed in the body part and a plurality of supporting pins extending outward from the body part. The supporting pins are inserted into the openings of the foot portions of the bulb holder and welded to the foot portions to achieve a tight connection between the base assembly and the bulb holder. In order to facilitate mating between the leading ends of the lead wires and the leading ends of the conducting plate members, there is further employed a guide structure which guides the leading ends of the lead wires to give portions of the conducting plate members upon coupling of the bulb holder and the base assembly.

Electric lamp assembly

A lamp assembly having a molded plastic holder body for holding a light bulb in position thereon. The light bulb has a flat base encircled by a holder band which has bulb retainer lugs resiliently engaging the bulb base under their own bias. The holder band inclusive of the bulb retainer lugs is made from a metal (e.g. nickel silver) that is resilient enough to enable the lugs to securely engage the bulb base. Spot welded to the holder band is a first connector made from another metal (e.g. austenitic stainless steels of certain specific compositions) that is weldable enough to permit the first connector to be firmly welded to the holder band. A second connector of substantially tubular shape, which may be made from the same metal as the first connector, is immovably engaged in the holder body and welded to the first connector. Thus the light bulb is securely engaged by the holder band of resilient metal and firmly mechanically coupled to the molded plastic holder body via the first and second connectors of weldable metal.

Electric lamp assembly having improved mechanical connection between

For coupling a halogen incandescent lamp to a plastic lamp base in correct positional relationship, a sheet-metal lamp holder is rigidly engaged with a hermetic end seal of the lamp, and a sheet-metal sleeve is anchored in the lamp base. The sleeve has several connecting fingers extending therefrom for somewhat loose engagement in openings in the lamp holder. The loose engagement of the sleeve fingers in the lamp holder openings permit adjustment of the positions of the lamp and the lamp base, which are secured respectively to the lamp holder and to the lamp base, with respect to each other. The sleeve fingers are welded to the lamp holder following the adjustment of the positional relationship between the lamp and the lamp holder.

Growing community of inventors

Shizuoka, Japan

Mitsuhiro Okano