| 摘要 |
<p>A windscreen wiper blade for a motor vehicle comprises two wiping portions (7 and 8). The first wiping portion (8) is mounted on a first wiper arm piece (5), which is of fixed length and mounted directly onto the wiper drive shaft (10), whereas the second wiping portion (7) is mounted on the second wiper arm piece (6), which slides telescopically on the first wiper arm piece (5). A cam follower (2) is attached to the second, telescopic arm piece (6), and engages a cam surface (1) which is fixed relative to the vehicle body. As the wiper arm assembly is driven in an oscillating fashion about its drive axis (10), the cam follower (2) follows the cam surface (1) causing the telescopic part of the wiper arm (6) to extend and retract, producing an expanded wiped area.</p> |
