Connecting structure of wiper arm

A connecting structure of a wiper arm, comprising:

• a wiper blade, connected to the wiper arm;
• a first connecting part, provided on the wiper arm;
• and
• a second connecting part, provided on the wiper blade and connected with the first connecting part, wherein
• any one of the first connecting part and the second connecting part is a connecting shaft extending along a width direction of the wiper arm;
• the other of the first connecting part and the second connecting part comprises a pair of claws defining a groove able to be engaged with the connecting shaft;
• the pair of claws have flexibility for bending in a direction of increasing an opening width of the groove;
• a slit defined by inner walls facing each other is provided on each side of the pair of claws in a direction along a longitudinal direction of the wiper blade;
• a first protrusion protruding toward inside each of the slits is provided on any one of the inner walls facing each other, and a second protrusion protruding toward inside each of the slits is provided on the other of the inner walls facing each other;
• the first protrusions and the second protrusions are respectively arranged offset from each other in a direction along an axial direction of the connecting shaft, and the first protrusions face a flat surface of a respective one of the inner walls, and the second protrusions face a flat surface of another respective one of the inner walls, wherein the first protrusions and the second protrusions respectively partially overlap each other in a direction orthogonal to the axial direction of the connecting shaft.