PURPOSE: Spray nozzle operating device for automatic fire extinguisher treats a fire by spraying chemical rapidly, is rapid operating time to open operating pin of spray nozzle by pressurizing, maximizes economy and confidence by minimizing poor operation with simple structure combined with gas generating hole, operating piston, cylinder etc. CONSTITUTION: Spray nozzle operating device for automatic fire extinguisher is characterized by installing spray nozzle(10) having spray nipple(11) on top part of fire extinguisher body(5) to hold chemical of extinguishing fires; spraying chemical of extinguishing fires through spray nipple(11) by opening spray nozzle(10), by operating with pressurization operating pin(12) kept elastic secure and installed to top part of the spray nozzle(10); fixation installing cylinder to be inputted operating piston by forming internal operating space part(21) on top part of the spray nozzle(10); installing with projection lock submaterial(23) to support operating piston on operating space part(21) with keeping elastic secure in the cylinder; connecting and installing gas generating hole(30) to generate eruption gas by transmitting electrical impact with heat sensing of heat sensor to pressurize operating pin(12) of spray nozzle(10) by pressurizing operating piston with eruption gas pressure of the gas generating hole(30) in generating fire.
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