Automotive headlamp with air passages round bulb and base - uses bulb retaining ring with circumferential air passages fitted over end of reflector

摘要

The incandescent bulb is placed at the focus of the headlamp reflector. The bulb is supported on a plate which is held trapped between the end of the reflector and the rubber cap which is pushed over the base of the bulb and over the edges of an annular ring. The annular ring has the cooling ducts formed circumferentially and is retained by metal tabs attached to the reflector. A toroidal rubber, or plastics sealing ring is placed around the reflector to close off the cooling passages and maintain water sealing round the reflector. The ring fits over ribbed sections in the supporting ring.