Fire alarm

The utility model relates to the technical field of fire alarms, in particular to a fire alarm, which comprises an alarm and a shell, a control panel is mounted at the center of the alarm, an alarm button is mounted on the outer surface of the control panel, bumps are symmetrically mounted on two sides of the shell, and the bumps are mounted on the outer surface of the control panel. And screw holes are formed in the interior of the protruding block and the side face of the alarm, bolts are rotationally connected into the screw holes, corner holes are symmetrically formed in the four corners of the outer surface of the alarm, and pressing columns are symmetrically installed at the four corners of the inner side of the shell. According to the utility model, through the arrangement of the convex blocks, the screw holes, the bolts, the corner holes, the pressing columns, the springs and other structures, the installation of a traditional fire alarm shell can be optimized, and meanwhile, the four groups of corner