| 摘要 |
An automotive vehicular headlamp adjustment mechanism comprises a ball rod having a ball element disposed upon a free end thereof for connection to a vehicular headlamp housing. A threaded drive rod, having oppositely disposed threaded sections formed thereon, is rotatably journalled within a bushing member which slidably supports the ball rod for slidable movement in extension and retraction directions. A plurality of pivotable spider elements, in the form of a scissor-jack assembly, interconnect the threaded drive rod and the ball rod such that upon rotation of the threaded drive rod in a first direction, the oppositely threaded sections of the drive rod cause the spider elements to converge toward each other whereby the ball rod is moved toward a retracted position, whereas upon rotation of the threaded drive rod in a second opposite direction, the oppositely threaded sections of the drive rod cause the spider elements to diverge away from each other whereby the ball rod is moved toward an extended position. In accordance with further embodiments of the invention, the ball rod is eliminated and the spider elements, operatively connected to the drive rod, are also operatively connected to bracket or plate members fixed to, for example, a headlamp reflector and the headlamp housing, or alternatively, to the headlamp housing and the vehicle frame, for respectively adjusting the reflector or housing relative to the housing or frame.
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