Power transmission mechanism for fire-extinguishing device

The utility model relates to a power transmission mechanism for a fire extinguishing device, which comprises a temperature sensing sheet, two ends of the temperature sensing sheet are respectively connected with steel wire ropes, and the two steel wire ropes are respectively fixed on a bracket and a transmission mechanism; the transmission mechanism comprises a valve body; a valve cover is arranged at the top of the valve body; a spring located in the valve body is arranged at the bottom of the valve deck, a pushing block is arranged at the bottom of the spring, and the spring is compressed between the pushing block and the valve deck. A piercing needle penetrating out of the valve body is arranged at the lower end of the pushing block; the steel wire rope is arranged on the piercing needle; a reverse wheel located on the steel wire rope is further arranged between the temperature sensing piece and the puncture needle. A bottle valve is arranged below the valve body; a valve core capable of lifting up and dow