| 摘要 |
Recessed zones 27, at the end of a drive head 11 of a wiper blade drive arm assembly, conveniently each include a stop step portion 28 located adjacent to the top of the edge of the zone so that it is substantially at the corner between the side walls 18 and the top wall 24 of the drive head. The stop step portion 28 engages with a stop step portion 30 on the edge 31 of a side flange 14 of a drive arm 13 so that the stop step portions 28, 30 together form a limiting stop to prevent the arm 13 pivoting about a pivot pin 20 in a clockwise direction beyond a limit or locked back position. In the locked back position, the rear edge 22 of the top wall 23 of the drive arm 13 is maintained out of contact with the top wall 24 of the drive head 11, so that damage to the top wall 24 is avoided. <IMAGE> |
