Patent ID: 7753634

Claim:
A parts attaching structure, comprising: a first part having a slot; a second part having an attaching hole; and a clip for connecting the first and second parts, the clip including: a first flange portion having a longer diameter shorter than a length of the slot of the first part and longer than a width of the slot, and a shorter diameter shorter than the width of the slot and adapted to engage with the first part when inserted into and turned in the slot; a shank portion extending from a central portion of an abutment face of the first flange portion against the first part and inserted into the slot; a second flange portion bulging from the shank portion, extended obliquely toward the first flange portion, and coming into elastic abutment against a peripheral edge of a back side of the slot; a third flange portion adjacent to the second flange portion, bulging from the shank portion, and abutting against a peripheral edge of the attaching hole of the second part; and a leg portion extending from a central portion of an abutment face of the third flange portion against the second part, inserted into the attaching hole of the second part, and retained on a peripheral edge of a back side of the attaching hole, wherein the shank portion has a section of a generally rectangular shape, as viewed in an axial direction, in which a pair of diagonally positioned corners form sliding portions of arcs of a large curvature, whereas a pair of remaining corners form stopper portions of arcs or corners of a smaller curvature, in which the sliding portions are rotatable in a direction to contact with longer sides of the slot, but in which the stopper portions are unrotatable in a direction to contact with the longer sides of the slot, wherein the first flange portion is arranged to have its longer diameter direction in a direction of a pair of opposed sides of the shank portion, and wherein a pair of protrusions, is formed on the first part, wherein, when the first flange portion and the shank portion are inserted into the slot, the first flange portion is in a first state, where the longer diameter direction of the first flange portion is aligned with the longer sides of the slot, wherein, when the first flange portion and the shank portion are rotated after being inserted in the slot, the first flange portion is in a second state, where the longer diameter direction of the first flange portion intersects the longer sides of the slot, and wherein the protrusions are configured: to be ridden over by a bottom face of the first flange portion when the first flange portion is rotated from the first state toward the second state; and to abut a side outer face of the first flange portion when the first flange portion is rotated from the second state toward the first state after the first flange portion is ridden over the protrusions, thereby obstructing the first flange portion from returning into the first state.