Abstract: A lock arm is formed with a first receiving surface and two second receiving surfaces, and the second receiving surfaces are disposed to sandwich the first receiving surface from both sides in a width direction intersecting a resilient displacing direction of the lock arm. A resilient arm of a detector includes a first butting portion configured to butt against the first receiving surface, a separation restricting portion projecting farther forward than the first butting portion from a position closer to a housing body than the first butting portion, and two second butting portions projecting from both widthwise outer side surfaces of the resilient arm. The second butting portions restrict a movement of the detecting member at an initial position to a detection position by butting against the second receiving surfaces.

Abstract: A lock arm is formed with a first receiving surface and two second receiving surfaces, and the second receiving surfaces are disposed to sandwich the first receiving surface from both sides in a width direction intersecting a resilient displacing direction of the lock arm. A resilient arm of a detector includes a first butting portion configured to butt against the first receiving surface, a separation restricting portion projecting farther forward than the first butting portion from a position closer to a housing body than the first butting portion, and two second butting portions projecting from both widthwise outer side surfaces of the resilient arm. The second butting portions restrict a movement of the detecting member at an initial position to a detection position by butting against the second receiving surfaces.