| 摘要 |
PROBLEM TO BE SOLVED: To make a component easily attached while surely directing a direction of the side of the component to a prescribed direction, when the component is attached to a printed circuit board, in a fire detector. SOLUTION: In this fire detector 1 provided with the printed circuit board 8, and the component 6 attached to the printed circuit board 8 and having an attaching part 63 to the printed circuit board 8 in its bottom, the attaching part 63 includes plural attaching pins 64 protruded from its under face 65 toward a mounting direction of the component, the plural attaching pins 64 are arranged to make a shape of the under face 65 of the attaching part 63 in view from the bottom including the plural attaching pins 64 assymetric, and the printed circuit 8 is inserted with the plural attaching pins 64 and has plural holes 81 provided to correspond to the arrangement of the plural attaching pins 64.
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