Patent ID: 9080756
Filing Date: 2015-07-14
Classification: G03B

Abstract:
1. An electronic flash device, comprising: a flash discharge tube consisting of a cylindrical glass tube provided with a pair of discharge electrodes at either end thereof and having an interior filled with a rare gas; and a trigger electrode disposed outside the flash discharge tube, wherein the trigger electrode is formed of a wire member or ribbon-shaped plate member extending along a longitudinal direction of the flash discharge tube, and comprises a linear section extending in a direction along a generating line of an outer circumferential surface of the flash discharge tube and a wave-shaped section including a tangentially extending portion that extends in a tangential direction of the outer circumferential surface of the flash discharge tube at a position where the linear section is in contact with the flash discharge tube, the wave-shaped section further including an upper curved portion extending above the linear section and a lower curved position extending below the linear section, the tangentially extending portion extending between the upper and lower curved portions.