Assembling structure of clip and mounting member

An assembling structure comprising:

• a mounting member including:
• a mounting seat;
• and
• a dip including:
• a head portion that is to be inserted into the mounting seat;
• and
• a leg portion that extends from one surface of the head portion and that is to be inserted into a mounted-side member,
• wherein the head portion includes:
• a neck portion that is to be inserted into the mounting seat;
• a first flange portion that outwardly protrudes from an upper-side circumference of the neck portion so that a lower face thereof abuts the mounting seat;
• and
• a second flange portion that outwardly protrudes from a lower-side circumference of the neck portion so that an upper face thereof abuts the mounting seat,
• wherein the mounting seat includes:
• an enlarged-diameter hole that has an inner diameter larger than an outer diameter of the neck portion;
• an introducing groove formed to communicate the enlarged-diameter hole with an outer peripheral of the mounting seat;
• and
• an inner projection that is formed such that portions of the inner projection disposed on opposite sides of a center axis of the enlarged-diameter hole downwardly protrude in an axial direction of the neck portion along a peripheral edge of the enlarged-diameter hole,
• wherein the upper face of the second flange portion includes:
• a first tapered face that radially-outwardly extends from the neck portion and is inclined such that portions of the first tapered face disposed on opposite sides of a center axis extending through the neck portion gradually extend toward the first flange portion as the first tapered face extends radially outward;
• a top portion that is continuous with the first tapered face and is closest to the first flange portion;
• and
• a second tapered face that radially-outwardly extends from the top portion and is inclined to gradually separate from the first flange portion,
• wherein the first tapered face abuts the inner projection in an assembled state in which the clip is assembled on the mounting seat,
• wherein the inner projection includes a third tapered face inclined to gradually come close to the second flange portion along a radially inward direction, and
• wherein, in the assembled state, an inclination angle of the third tapered face against a plane perpendicular to a center axis of the clip is larger than an inclination angle of the first tapered face against the plane.