Wiper device, especially for windshields of automobiles

A wiper system, in particular for motor vehicle windows, comprising a driveable wiper arm, (20) guided at one end on the motor vehicle, wherein, on an exposed end (21) of said wiper arm, a wiper blade (12) capable of being placed against the window (16) with a wiper strip (22) is detachably hinge-mounted via a connection device (18), wherein said connection device has a pivot bolt (24) on an arm side, wherein an axis of articulation of said pivot bolt extends substantially transversely to a longitudinal direction of the wiper blade in a working direction of the wiper system (10), and which has a coupling part (28) with a bore-type bearing receptacle (62) for the pivot bolt (24) on a wiper blade side in the center section of the wiper blade on a side opposite from the window, whereby the bearing receptacle (62) is open-edged along a cylindrical surface over a pass-through channel (70) for the pivot bolt pointing in the direction of the bore axis, wherein said bearing receptacle is provided with a bottleneck (94) capable of being expanded elastically to a diameter (92) of the pivot bolt, wherein the width of said bottleneck is smaller than the diameter of the bearing receptacle, wherein the coupling part (26) is provided with a separate locking element (42) to form the bottleneck, wherein said locking element is capable of being moved, against a return force (96), from a locked position that blocks the pass-through channel into an open position that exposes the pass-through channel, wherein the bearing receptacle (62) for the pivot bolt (24) of the wiper arm (20) penetrates two guide walls (36, 38) and the locking element (42), whereby recesses (64, 66) adapted to a cross section of the pivot bolt in the guide walls and in the locking element located in the locked position complement each other to at least approximately form a circle as viewed in the direction of the axis of articulation, wherein each of the bearing receptacle sections is open over one pass-through channel section toward a side of the coupling part (26) opposite from the window, whereby the width of each section is greater than the diameter of the pivot bolt (24), wherein the locking element (42) is loaded toward the locked position by spring means supported at the housing part (34), and wherein the spring means are formed by a leg spring (156) interconnected as a single component with the housing part (134) composed of an elastic plastic.