Electro-pyrotechnic initiator built around a complete printed circuit

摘要

The invention relates to an initiator for a pyrotechnic gas generator intended for motor vehicle safety. The initiator (2) is built from a circuit support (10) on which conductive strips are printed which include electromagnetic protection and the ends of which are joined together by a resistive element covered with a thermosensitive charge (6). The conductive strips are connected to an electric cable (3). The support (10) is coated in a cylindrical overmoulded insulation (4, 5). A fragmentable cylindrical cap (8) containing an igniter composition (9) forms, together with the initiator (2), an igniter (1) for pyrotechnic generators intended for motor vehicle safety.