| 摘要 |
PURPOSE: A teargas injector of a cab is provided to help a driver escape from danger by discharging tear gas to rear seats of a cab when passengers threatens the driver. CONSTITUTION: A teargas injection system of a cab is comprised of: a head rest(4) having several injection holes(1,3) on the upper, rear and both sides except the front side, assembled to driver's seat of a cab; and a teargas injection unit mounted in the head rest to inject tear gas to the rear and both sides by an operating switch in emergency. A driver pushes the operating button on a steering wheel or driver's seat when a passenger threatens the driver with a weapon. Thereby, battery power is fed to an electromagnet and a pressure plate is moved toward the electromagnet out of an operating cylinder(13). A vacuum tank(15) generates high pressure therein, and the pressure is delivered to a teargas housing(20). A piston is pushed to compress tear gas filling the teargas housing. The tear gas is injected through a check valve when the pressure reaches a specific reference value. Therefore, the tear gas flows through a guide(21) to be injected into each injection hole of the head rest.
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