專利摘要：
The inflation switch (1) for a pneumatic protective jacket (8) has an angular speed gyroscope to measure a change in the angular speed of a sideways falling human body and for converting the change into a corresponding output voltage. A storage unit stores a predetermined output condition and a control unit senses the output voltage and compares it with the predetermined condition, after which the control unit transmits a signal to an inflation device to inflate the jacket if the output voltage matches the predetermined condition.