| 摘要 |
The invention relates to emergency-deceleration condition transducers, including an insulating case made by insulating material, which defines a sealed arc hollow groove. Said arc hollow groove was filled with some mercury. Said mercury in the arc groove would move to front and behind along the arc surface when the travelling speed changes during the motor vehicle travelling, so that the electrodes spaced be turned on/turned off to produce corresponding condition signal. The invention relates still to emergency brake lamps using the emergency-deceleration condition transducers, the turn on/turn off of the lamps would be carrying out automatically without effect by driver mistaking operating, so the accident of vehicle striking from behind be effectively avoided.
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