Check link apparatus

A check link apparatus comprising:

• an arm comprising a metal core that comprises:
• a plate-shaped arm core portion;
• a connecting core portion that is provided at a first end of the arm core portion and is connected rotatably to either of a vehicle main body or a door;
• and
• a plate shaped stopper core portion that is provided at a second end, which is opposite to the first end, of the arm core portion and expands in a direction intersecting a longitudinal direction of the arm core portion, wherein the stopper core portion is coplanar with the arm core portion, the stopper core portion has a substantially uniform thickness, and a stopper portion is formed by covering at least the stopper core portion with a resin material;
• and
• a holding member that is mounted on the other of the vehicle main body and the door, through which the arm core portion is slidably inserted, wherein the holding member is configured to define a full open position of the door by being brought into abutment with the stopper portion,
• wherein the stopper core portion has a curved surface on an end face that is configured to face an abutment surface of the holding member at least when the abutment surface of the holding member is brought into abutment with the stopper portion, the end face continued from the arm core portion curves toward a plane orthogonal to a longitudinal axis of the arm at the stopper core portion so as to form at least a portion extending along the plane orthogonal to the longitudinal axis of the arm at the stopper core portion, and the portion of the end face extending along the plane orthogonal to the longitudinal axis of the arm is directly connected to the curved surface, and
• wherein a circular hole is formed substantially in a center of the stopper core portion, the circular hole penetrates through the stopper core portion in a thickness direction thereof, the circular hole is included in a widthwise dimension of the arm core portion extended in a longitudinal direction of the arm core portion, the circular hole is formed in a position which lies between a distal end of the stopper core portion and an intersection of the arm core portion and a widthwise widened portion of the stopper core portion, and the circular hole extends to a proximity of the plane orthogonal to the longitudinal axis of the arm along which the end face of the stopper core portion extends.