Fixing device for helmet-type thermal infrared imager for fire control

The utility model relates to a fixing device for a helmet-type thermal infrared imager for fire control, which comprises a concave dovetail groove arranged on one side face of the thermal infrared imager; an elastic button is arranged on the other side face of the thermal infrared imager; a U-shaped clamping groove is arranged on one side face of a helmet; and a convex dovetail guide rail matched with the concave dovetail groove of the thermal infrared imager and a hole matched with the elastic button are arranged on the U-shaped clamping groove. During the assembly, the thermal infrared imager is pushed into the U-shaped clamping groove along the convex dovetail guide rail; when the position of the hole on the U-shaped groove is slidden, the elastic button on the thermal infrared imager is popped out of the hole; in this case, the elastic button can exert good limiting effect. The U-shaped clamping groove is fixed with the fire control helmet through a screw, and the upper and the lower angles of the thermal