A fire extinguisher comprising:
- a body including a chamber having an opening in an upper end of the body, with the chamber adapted to receive fire extinguishing powders;
- an upper cover covering the opening of the body, with the upper cover including an output passage in communication with the chamber, with the upper cover further including a gas inlet passage in communication with the chamber, with the upper cover further including a first coupling portion having a gas intake in communication with the gas inlet passage, with the upper cover further including a second coupling portion, with the second coupling portion including a through-hole aligned with the gas intake, with the second coupling portion further including at least one pivot hole and at least one pin hole;
- a high-pressure steel bottle including a top end coupled to the first coupling portion, with the high-pressure steel bottle adapted to receive a high pressure gas, and with the high-pressure steel bottle including a preserved opening aligned with the gas intake;
- and
- a gas intake control unit including:
- a check valve mounted in the gas inlet passage of the upper cover, with the check valve adapted to prevent the gas from flowing through the gas inlet passage in a reverse direction;
- a piercing needle mounted in the gas intake of the first coupling portion and the through-hole of the second coupling portion, with the piercing needle including a needle on a bottom end thereof, with the needle adapted to pierce into the preserved opening of the high-pressure steel bottle, with the piercing needle further including an abutment portion on a top end thereof, and with the abutment portion extending upward beyond the through-hole of the second coupling portion;
- a spring holding the piercing needle such that the needle of the piercing needle will not pierce into the preserved opening of the high-pressure steel bottle when the spring is not compressed;
- a pressing rod including a shank pivotably connected to the at least one pivotal hole of the second coupling portion, with the shank including a pressing portion for pressing against the abutment portion of the piercing needle;
- a switch handle including a holding portion located outside of the upper cover, with the switch handle further including at least one side portion operably connected to the pressing rod, with the holding portion spaced from the shank of the pressing rod;
- a pin extending through the at least one pin hole, with the pin restraining movement of the switch handle, wherein if the pin is removed, when the holding portion of switch handle is operated to drive the pressing rod to pivot, the piercing needle is actuated by the pressing portion to pierce into the preserved opening of the high-pressure steel bottle.