Patent ID: 7652434
Filing Date: 2010-01-26
Classification: G03B,H05B

Abstract:
1. An electronic flash unit comprising: a transformer to vary voltages of a power supply; an accumulator composed of a main capacitor to charge an electric energy supplied from the transformer; a lamp unit provided with a flashlamp, set inside of a reflector, that flashes by discharging of energy storages in the main capacitor upon applying a voltage on a trigger terminal; and a trigger circuit to generate voltages to apply on the trigger terminal, wherein at least the lamp unit is completely insulated by an insulation material by filling the insulation material in to a mold after positioning the lamp unit in the mold, wherein the mold includes an input hole through which the insulation material is supplied into the mold so as not to have a space which causes a creeping discharge, and a vent hole for exhausting air within the mold while the insulation material is supplied into the mold wherein the lamp unit requires at least 300 v for operation.