Patent ID: 8106784

Claim:
A combination smoke and heat detector, comprising: a body base; a printed circuit board mounted to the body base; a thermosensitive element provided upright on the printed circuit board; a dark chamber, mounted to the printed circuit board, for shielding external light so that smoke particles flow therein; an indication lamp mounted to the printed circuit board; a protective cover provided with respective opening holes through which the thermosensitive element and the dark chamber pass, the protective cover being engaged with the body base; and a bar-like light guide for guiding light emitted from the indication lamp to outside of the protective cover, wherein: the leading end of the thermosensitive element is provided at a height by which the leading end thereof protrudes on a lateral side of the dark chamber with respect to the cover top surface portion; the light guide passes through a through-hole formed in the protective cover so as to be mounted in the through-hole, with one end surface thereof facing the indication lamp, and another end surface thereof protruding to the outside of the protective cover by a height substantially equal to or larger than a protruding height of the dark chamber; and the light guide is arranged in the protective cover oppositely relative to the thermosensitive element with the dark chamber being sandwiched therebetween.