In a state wherein a striker (88) is not locked in a latch (90), a movable terminal (74) of a spring terminal (70) is in contact with a fixed terminal (54) of a terminal base (14). Namely, a micro switch is turned ON. Here, the movable terminal (74) is folded outwardly, and includes a leaf spring function. Further, in an end portion of the movable terminal (74), a hemispherical contact portion (74A) protrudes outwardly, and the contact portion (74A) contacts a contact portion (54A) of the fixed terminal (54). Thus, in a state wherein the contact portion (74A) is in contact with the contact portion (54A), elastic energy is accumulated in the movable terminal (74).