| 摘要 |
A safety step assembly for use with vehicles such as trucks or the like is provided with spring biased mounting brackets to removably mount the step assembly on a vehicle without resort to permanent attachment means, and includes spring biased parallelogram support linkage which is automatically operated upon mounting and dismounting of a step by a user to swing the step between an inward raised storage position thereof and an outward lowered position of use. Engageable holding structure interposed in the swing path of the linkage blocks movement of the latter when the step is in the use position and maintains such linkage in an inclined position to impose a stabilizing force on the step, thereby securely holding the step in the use position thereof without fear of shifting or instability. In one form, the step assembly is adapted to be mounted between a door opening and a chassis frame of a vehicle in a manner which discourages theft thereof, while another form of the step assembly is adapted for mounting on a swingable tailgate of a pickup truck.
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