Wiper blade and vehicle wiper device

A vehicle wiper device comprising:

• a wiping blade that wipes a wiping surface, the wiping blade comprising:
• a blade rubber that is disposed in contact with the wiping surface;
• a first backing that is formed from leaf spring material and applies pressing force directed toward the wiping surface to the blade rubber;
• a wiper case that holds the blade rubber;
• a state changing member, which is a second backing accommodated in the wiper case next to the first backing so as to be rotatable in the wiper case or movable in a longitudinal direction, the state changing member being configured to change a curved form or a rigidity in the longitudinal direction of the wiper blade in accordance with a curved form of the wiping surface when a rotational position or a longitudinal position of the state changing member is changed;
• and
• an electric driving device configured to change the rotational position or the longitudinal position of the state changing member;
• a wiper arm including a distal end portion to which the wiper blade is attached;
• a wiper motor that pivots the wiper arm back and forth so that the wiper blade produces a wiping action;
• a control circuit that controls and drives the wiper motor and the electric driving device;
• and
• a wiping position detection sensor that detects a wiping position of the wiper blade,
• wherein the control circuit is configured to change a rotational position of the second backing with the electric driving device during the wiping action and in accordance with the wiping position of the wiper blade.