초록 ▼

The present invention relates to a two-wire pyrotechnic initiator unit intended for motor-vehicle safety. The initiator unit comprises a socket molded over electrodes which are connected, on the one hand, to a pyrotechnic ignition device and, on the other hand, to unstripped electrical wires via def

The present invention relates to a two-wire pyrotechnic initiator unit intended for motor-vehicle safety. The initiator unit comprises a socket molded over electrodes which are connected, on the one hand, to a pyrotechnic ignition device and, on the other hand, to unstripped electrical wires via deformable conducting pincers capable of cutting the insulating sheath of the wires. The wires are supported by an elastic ring which can be snap-fastened in the socket and which presses the conducting pincers. The initiator unit is useful for manufacturing two wire pyrotechnic gas generators for inflatable cushions or seat belt tensioners in which the unstripped wires are only incorporated at the end of the assembly.

대표청구항 ▼

[ What is claimed is:] [1.] The two wire pyrotechnic initiator unit (1) consisting mainly of:i) a socket (2) whose ends consist of two plane faces (3,4,) the said socket being integrally formed with a first central bore and a second central bore, said first central bore (5), called "lower" bore, eme

[ What is claimed is:] [1.] The two wire pyrotechnic initiator unit (1) consisting mainly of:i) a socket (2) whose ends consist of two plane faces (3,4,) the said socket being integrally formed with a first central bore and a second central bore, said first central bore (5), called "lower" bore, emerging on one of the said faces and into which two electrical lead wires (6,7) penetrate, each consisting of a conducting core (8) surrounded by an insulating sheath (9), and said second central bore (10), called the "upper" bore, which is separated from the first bore and which emerges on the other plane face (4) and which contains a pyrotechnic initiation device (11);ii) two electrodes (14, 15) fixed inside the said socket and the ends of which are located in each of the two bores (5,10), the lower ends of each electrode being connected to one of the said lead wires while the upper ends of the said electrodes are connected to the pyrotechnic initiation device (11); characterized in that:iii) each of the said electrodes (14, 15) is terminated in its lower part by a conducting pincer (17,18) capable, under the stress of a thrust exerted in the extension of the said electrodes, of clamping one of the said lead wires (6,7), cutting its insulating sheath (9);iv) the lower part of the said first central bore (5) has at least one recess;v) the ends of the said lead wires (6,7) penetrating into the first central bore (5) of the socket (2) are supported by a closure ring (34) whose side wall has at least one external rib (35-36) allowing, by engagement in the said recess (32,33), the ring (34) to be irreversibly snap-fastened into the socket (2), the said ring moreover including elements for stressing the said conducting pincers (17, 18).