초록 ▼

An acceleration sensor apparatus for a vehicle capable of properly detecting an acceleration acting on a vehicle body in a predetermined direction even when the mounted orientation of the acceleration sensor apparatus changes relative to the vehicle body, and capable of providing an output operation

An acceleration sensor apparatus for a vehicle capable of properly detecting an acceleration acting on a vehicle body in a predetermined direction even when the mounted orientation of the acceleration sensor apparatus changes relative to the vehicle body, and capable of providing an output operation when the vehicle body tilts more than a predetermined angle. A sensor housing is fixed on a vehicle body such as on a seatback. A sensor bracket is swingably supported by the sensor housing about an axis parallel to an axis of tilt of the seatback. An inertial body is movably supported in a support depression of the sensor bracket. An output interlock member provides an output operation in an interlocking relation with an ascending movement of the inertial body along a slope of the support depression. An upper weight is located above a swing center axis. A lower weight is provided so that the center of gravity of an assembly swingably supported about the swing center axis is positioned below the swing center axis. Further, when the sensor bracket swings more than a predetermined angle, a forcibly driving member provides an output operation so as to restrain the webbing from further being released from a retractor.

대표청구항 ▼

[ What is claimed is:] [1.] An acceleration sensor apparatus wherein an inertial body is inertially moved according to a vehicle acceleration, comprising:an inertial body;a sensor bracket which supports said inertial body so that the inertial body is movable within a predetermined range within said

[ What is claimed is:] [1.] An acceleration sensor apparatus wherein an inertial body is inertially moved according to a vehicle acceleration, comprising:an inertial body;a sensor bracket which supports said inertial body so that the inertial body is movable within a predetermined range within said bracket, said sensor bracket being swingably supported in a vehicle;a lower weight which is mounted on said sensor bracket below said inertial body, said lower weight having a center of gravity located below a swing center of said sensor bracket, and being structured to maintain said sensor bracket in a same position relative to a vertical axis regardless of a tilt of the vehicle; andan upper weight which is lighter than said lower weight and is mounted on said sensor bracket above said inertial body, said upper weight having a center of gravity located above the swing center of said sensor bracket and structured to cancel a swing of said sensor bracket induced by an acceleration acting on said sensor bracket and lower weight to thereby keep said bracket at a standstill.