초록 ▼

The invention relates to a gas microgenerator intended more particularly for automobile safety. The microgenerator (1) comprises an igniter support (2) provided with a central bore (3) extended by a cylindrical neck (4) in which an igniter body (5) is fixed by crimping, two electrodes (8, 9) passing

The invention relates to a gas microgenerator intended more particularly for automobile safety. The microgenerator (1) comprises an igniter support (2) provided with a central bore (3) extended by a cylindrical neck (4) in which an igniter body (5) is fixed by crimping, two electrodes (8, 9) passing through this igniter body. A resistor (10) embedded in an ignition composition (11) links the two electrodes together. A shatterable case (13) containing an ignition powder (14) surrounds the resistor and the ignition composition. The electrodes in their lower part include cutting slots into which are inserted two electrically conducting sheathed wires (20, 21) coming from a supply cable (19). A closure piece (24), which is snap-fitted into the central bore locks the microgenerator. The microgenerator can be used to operate a belt retractor or to ignite a generator intended to inflate an airbag.

대표청구항 ▼

[ We claim:] [1.] Pyrotechnic gas microgenerator (1) which includes:i) an igniter support (2) in the form of an axisymmetric piece which includes a central bore (3) extended by a hollow cylindrical neck (4), the axis of which coincides with the axis of the support;ii) an igniter body (5) in the form

[ We claim:] [1.] Pyrotechnic gas microgenerator (1) which includes:i) an igniter support (2) in the form of an axisymmetric piece which includes a central bore (3) extended by a hollow cylindrical neck (4), the axis of which coincides with the axis of the support;ii) an igniter body (5) in the form of an axisymmetric piece which goes into the said hollow neck (4) and into an upper part of the said central bore (3) which lies near said neck, the igniter body being fastened to the said support and containing two longitudinal electrodes (8, 9) which pass right through it, the upper ends of the said electrodes being linked together by a pyrotechnic ignition assembly (10, 11), while the lower ends of the said electrodes lie inside the central bore (3) and are connected to a cable (19) which includes two electrically conducting sheathed wires (20, 21);iii) a shatterable case (13) which bears on the igniter support (2), surrounding the said neck (4) as well as the said ignition assembly, and which contains an ignition powder (14); racterized in that:iv) the igniter support (2) includes a radial opening (3a) enabling the conducting sheathed wires to be inserted and in that the said central bore (3) has an internal cut-away (23);v) the lower ends of the electrodes (8, 9) each include at least one slot (17) parallel to the axis of the igniter body, this slot having cutting edges and one of the conducting wires being inserted into it;vi) a piece (24) for holding the electrodes in place, which has an external lateral rim (25) and is snap-fitted into the internal cut-away (23) of the said central bore.