| 摘要 |
A seat adjustment latch, selectable at two different force levels, is attached to a slide adjustable seat in a motor vehicle equipped with a seat belt assembly, an inflatable air bag, and a knee restraint. The seat adjustment latch is interlocked with the seat belt assembly of the seat such that when the seat belt is unfastened, the seat adjustment latch is set to release the vehicle seat in the event of a rapid deceleration or impact to the vehicle above a predetermined level of severity. When the seat belt is fastened, the seat latch is set in its firmest possible retention setting and operates such that the inertia and kinetic energy forces of the seat and the occupant seated thereon will not move the seat forward in response to a severe frontal collision. In a preferred embodiment, the seat adjustment latch includes a shearing element configured as a tubular bolt for retaining the slide adjustable vehicle seat to the seat rails. The tubular bolt is selectively reinforced at a shear region by a moveable insert piece, the movement of which is influenced mechanically by the fastened/unfastened condition of the seat belt. In an alternate embodiment, the movement of the insert piece is controlled electrically.
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