Vehicle wiper device

A wiper device for wiping a window supported by a vehicle body, the wiper device being located between the window and the vehicle body, wherein the window opens and closes an opening in the vehicle body, the device comprising;

• an actuator supported by the vehicle body, the actuator having an output shaft;
• a pivot disk attached to the output shaft, the pivot disk having an opening, which is radially spaced from the axis of the output shaft, wherein the actuator pivots the pivot disk in a first angle range;
• a pivot shaft rotatably supported by the window, wherein, when the window is closed, the axis of the pivot shaft is aligned with the axis of the output shaft;
• a lever attached to the pivot shaft, the lever having a projection, which is radially spaced from the axis of the pivot shaft, wherein, when the window is closed and the projection is inserted into the opening, the lever is coupled to the pivot disk to transmit rotation of the output shaft to the pivot shaft, and wherein, when the window is opened, the projection is disengaged from the opening;
• a wiper arm attached to the pivot shaft, wherein, when the actuator is activated with the lever coupled to the pivot disk, the wiper arm pivots in an angle range corresponding to the first angle range;
• a limit member for limiting the angle range of the lever to a second angle range, the second angel range being greater than the first angle range, wherein each of two ends of the second angle range is outside the corresponding end of the first angle range;
• and
• a guidance structure, wherein, when the projection on the lever is outside the first angle range, the guidance structure guides the projection to the first angle range by mechanical engagement.

A wiper device for wiping a window supported by a support, the wiper device being located between the window and the support, wherein the window opens and closes an opening in the support, the wiper device comprising:

• an actuator supported by the support, the actuator having an output shaft;
• a first coupler attached to the output shaft, wherein the actuator pivots the first coupler in the first angle range, wherein the first coupler includes a first engagement member, the first engagement member being radially spaced from the axis of the output shaft;
• a pivot shaft rotatably supported by the window, wherein, when the window is closed, the axis of the pivot shaft is aligned with the axis of the output shaft;
• a second coupler attached to the pivot shaft by a lever, wherein the second coupler includes a second engagement member, the second engagement member being radially spaced from the axis of the pivot shaft, wherein, when the window is closed and the second coupler is at a predetermined rotational phase relative to the first coupler, the first and second engagement members are engaged, so that the second coupler is coupled to the first coupler to transmit rotation of the output shaft to the pivot shaft;
• and
• a wiper arm attached to the pivot shaft, wherein, when the actuator is activated with the second coupler coupled to the first coupler, the wiper arm pivots in an angle range corresponding to the first angle range,
• wherein one of the first and second engagement members is the wall of a recess and the other is a projection, wherein, when the second coupler is outside the first angle range, the recess and the projection cooperate to guide the second coupler to the first angle range, wherein the recess includes a large portion, which has a diameter larger than the diameter of the projection, and a small portion, which has a diameter substantially the same as the diameter of the projection, wherein the projection enters the large portion before entering the small portion when the first and second couplers are coupled.