Sprinkler Head

A sprinkler head, comprising:

• a main body including a nozzle from which fire-extinguishing liquid is discharged;
• a valve element with which the nozzle is closed;
• a heat-sensitive disassembling unit including a plunger having an interior circumferential surface, the heat-sensitive disassembling unit being configured to keep the nozzle closed with the valve element and to open the nozzle through a breakdown action during activation of the sprinkler head;
• a frame having a cylindrical shape and including an upper part connected to the main body and a lower part engaged with the heat-sensitive disassembling unit;
• a set pin disposed between the valve element and the heat-sensitive disassembling unit and including a leg inserted in the plunger, the leg including an inclined surface and a straight portion closer than the inclined surface to the valve element, the straight portion being in contact with and slidable over the interior circumferential surface of the plunger;
• and
• a resilient body engaged with the set pin, wherein
• the breakdown action causes the set pin to move, with the inclined surface contacting the interior circumferential surface of the plunger and with inclination of the heat-sensitive disassembling unit from the set pin being rendered possible.