| 摘要 |
A safety device attachable to a motor vehicle for preventing the motor vehicle from running over an object, the device including a plate assembly, a safety bar assembly slidably connected to the plate assembly, a first mechanism for raising and lowering the safety bar assembly with respect to the plate assembly, at least one switch assembly and a second mechanism for turning off the motor vehicle. The plate assembly includes first and second plate members which are spaced apart in parallel. The second plate member is pivotably connected to the first plate member. The second plate member pivots around a horizontal axis. The first mechanism is attached to the second plate member. The safety bar assembly is attached to the second plate such that it can only slide relative to the second plate in a direction towards and away from the second plate. The switch assembly is attached to the first plate and extends to contact the second plate. The switch assembly is connected to the second mechanism. When the safety bar assembly is contacted by an object, the second plate member pivots relative to the first plate member about its horizontal axis and causes the switch assembly and the second mechanism to turn off the motor vehicle. In addition, the safety device may include an audio device for emitting an audio signal when the second plate pivots relative to the first plate.
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