Drive circuit of airbag

Abstract

Abstract PURPOSE:To obtain an airbag, which is hard to malfunction, without employing unnecessary large resistance value in monitor resistances by a structure wherein a detonator is bridged between both ends, to which first monitor resistances connected to the respective switching means of the detonator and second monitor resistances are respectively branched. CONSTITUTION:First monitor resistances R1, R2 and RB are respectively connected in parallel to G-sensors 8 and 9, at the power source side of each of which second monitor resistances RC and RD are respectively connected by branching. The squib resistance RSR of a detonator 10 bridges the branched other ends of the resistances RC and RD. Here, let RA denote the parallel resistance R1//R2 of the monitor resistances R1 and R2. In addition, the squib resistance RSQ of the detonator is set far smaller than any monitor resistances or RSQ<<R1, R1//R2=RA and RD. Further, the respective monitor resistances are selected so as to satisfy the relation: RA:RD=RC:RB.

Inventors

• 👤 Osamu Ono
• 👤 治 小野

Bibliographic Details