| 摘要 |
PURPOSE: An explosion-proof megaphone is provided to modularize a part capable of generating sound by forming the part in the inner side of a case which is separated from outside. CONSTITUTION: A module case(6) is inserted into the inner side of a body unit case(8). The module case has a structure which is separated from outside capable of eliminating inside ignition. A sound source output through-hole which outputs a sound source is formed in the module case. An absorption core case(1) is combined in the sound source output through-hole of the module case. A static electricity absorbent core blocks the exhaustion of an explosiveness flame or static electricity of the module case inside. A driver unit(3) is combined with the absorbent core in order to form a sound source output. An explosion-proof circuit unit comprises an output control circuit capable of controlling an output level, an over voltage protective circuit capable of filtering overvoltage, and a static charge circulation circuit capable of circulating static charge. An explosion-proof terminal is formed in a rear case cover of the module case. |
