| 摘要 |
<p>An improved photoflash unit (10) comprising a circuit board (43) with lamp-firing circuitry (55) thereon, a plurality (e.g. ten) of electrically activated photoflash lamps (11-15 and 21-25) and a reflector (40,41) located between the lamps and circuitry. The lamp-firing circuitry (55) includes at least one switch which is activated by radiant energy emitted from an adjacent photoflash lamp. The improvement comprises providing at least one longitudinal opening (slot) (83) within a cavity portion (21', 12', 14') of the reflector (40,41) between the activating lamp and switch, and surrounding the opening (83) with a transparent, non-conductive region (85) to thereby assure consistent switch activation by substantially eliminating arcing between the reflector and circuitry.</p> |
