Patent ID: 7091834

Claim:
An antitheft device, which is mounted on a vehicle having an expansible body system to expand an expansible body in a prescribed space inside the vehicle, said antitheft device comprising: an intruder detector operable to detect the presence of an intruder inside the vehicle; and a controller operable to control a driving unit of the expansible body system so as to expand the expansible body when the presence of an intruder inside the vehicle is detected by said intruder detector; wherein said controller is to be connected to a driving unit of a gas ejection system, and is operable to control the driving unit of the gas ejection system so as to eject a gas inside the vehicle; and wherein the driving unit of the gas ejection system is controlled so as to eject the gas inside the vehicle when a first predetermined condition of an elapse of a preset time is met after a condition for expanding the expansible body is met.