PROBLEM TO BE SOLVED: To realize a rainproof fire alarming transmitter capable of being easily assembled and fixed, and being reduced in product cost, by realizing a rainproof function with a simple structure. ;SOLUTION: A rainproof cap for a switch 24 covering a push button switch 22 and packing 23 are brought into press-contact with each other to fix the switch 22 to a cover 21 and a rainproof cap 20 integrally formed of a flexible material is fitted to the cover 21 such as covering the switch 22 from a back face side to hermetically seal and house the switch 22 fixed by the cover 21.;COPYRIGHT: (C)1998,JPO
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