| 摘要 |
A sensor and trigger mechanism of the type including a pressure vessel having an outlet secured to a cylindrical support member and sealed by a rupturable diaphragm. An axial guide pin mounted on the support extends through an axial opening in an intermediate wall of the support and slidably supports a penetrator pin for rupturing the diaphragm. The open ends of a hollow frangible glass cylinder seat between the support wall and the pin. The particular mechanism disclosed includes a ball of predetermined weight seated on a frusto-conical pedestal and held against movement by a lever arm pivoted at one end and mounting a pressure pad on the free other end thereof engaging the ball diametrically opposite the seat. A coil compression spring engages an intermediate portion of the lever. The spring seats on an embossment of the arm and on a threadedly adjustable guide pin. The free end of the lever arm includes two lateral tangs which engage the bight portion of a torsion spring to detent the bight portion against movement. A fragmentor pin is slidably mounted on the support for engagement with the glass cylinder when engaged by the bight portion of the torsion spring. A threaded nylon member includes a deflectable tang which engages an annular groove in the shank of the fragmentor pin to releasably detent the pin against movement. When the glass cylinder is fragmented, a compression spring engaging the head of the penetrator pin moves the penetrator pin into engagement with the diaphragm to rupture the diaphragm and release the contents of the pressure vessel for inflation of an occupant restraint cushion.
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