Patent ID: 7658101

Claim:
A raindrop detection device, comprising: a first fixing member which is fixed to a windshield and has a first engagement portion; a detection unit for optically detecting raindrop adhered to the windshield; an inner housing in which the detection unit is accommodated; an outer housing in which the inner housing is accommodated and which is fixed to the inner housing; a second fixing member having a second engagement portion which is detachably engaged with the first engagement portion of the first fixing member, the second fixing member being detachably engaged with the inner housing to detachably fix the inner housing to the first fixing member; and a leaf spring which is engaged with the inner housing to press and bias the inner housing toward the windshield, wherein the second fixing member has a leaf-spring biasing portion, which contacts the leaf spring mounted to the inner housing to elastically bias the leaf spring toward the windshield at a predetermined pressing force.