| 摘要 |
<p>A wiper arm device which prevents cracks on a painted layer according to the present invention includes an arm head; a retainer which is joined to one end of the arm head and installed to rotate around the arm head; and a rivet which is arranged to be penetrated through a joined portion of the retainer and the arm head and which configures a rotary shaft. The rivet includes a bearing unit which slides and touches the inner periphery of a through-hole formed on the arm head; a head unit which is supported by one lateral surface of the retainer while being in contact with one lateral surface of the retainer; and a calking unit which is fixed to the other lateral surface of the retainer by a calking process while the bearing unit is interposed between the other lateral surface of the retainer and the calking unit. The rivet includes a movement preventing unit arranged between the head unit and the bearing unit and forcibly press-fitted into an assembly hole formed on the retainer.</p> |
