Wiper mechanism with alternating linear wiping comprising improved means for tensioning the cable

摘要

The invention concerns a mechanism comprising a guide carriage sliding on a rail and bearing a wiper blade (18), and comprising means driving the carriage including a cable (21) whereof a strand is linked to the carriage (14) and passes along at least a mobile return member (30), comprising a groove (34) guiding the cable (21), which is elastically stressed to form an automatic cable tensioning member. The invention is characterised in that the body of the return member (32) wherein the groove (34) guiding the cable (21) is formed is fixed relative to the linear movement of the cable (21) which slides in the groove, and the cable tensioning device comprises elastic means (52) which urge said body (32) along a direction (D) globally perpendicular to the section of the cable (21) sliding in the guiding groove (34).