Wiper device

A wiper device comprising:

• first and second pivot shafts, each having a distal end to which a wiper arm is fixed;
• first and second pivot holders fixed to a vehicle body, which pivotally support the first and second pivot shafts and include first and second attachment shafts, respectively;
• a hollow frame formed by a hollow member, which couples the pivot holders to each other;
• a drive source fixed to the hollow frame;
• a link rod which transmits drive force of the drive source to the first and second pivot shafts;
• wherein the hollow frame includes first and second coupling-fixing portions, a drive source fixing portion and first and second crank portions;
• the drive source fixing portion is arranged between the first and second coupling-fixing portions and fixed with the drive source;
• the first and second attachment shafts are respectively crimped and fixed to the coupling-fixing portions in a state inserted into the corresponding coupling-fixing portions along axes of the coupling-fixing portions, and the axes of the first and second coupling-fixing portions lie along a straight line;
• and the hollow frame is bent so as to arrange the drive source fixing portion spaced apart from the first and second pivot holders in a direction extending from the distal ends towards basal ends of the pivot shafts;
• the link rod includes a drive link rod, which transmits the drive force of the drive source to the first pivot shaft, and a synchronization link rod, which further transmits the drive force of the drive link rod to the second pivot shaft;
• the first crank portion is bent to be crank-shaped and extends between the drive source fixing portion and the first pivot holder;
• the second crank portion, is bent to be crank-shaped and extends between the drive source fixing portion and the second pivot holder;
• and
• the first crank portion includes the first and second bent sections, the second crank portion includes the third and fourth bent sections, and bending angles of the first and second bent sections are smaller than bending angles of the third and fourth bent sections.

A wiper device comprising:

• first and second pivot shafts, each having a distal end to which a wiper arm is fixed;
• first and second pivot holders fixed to a vehicle body, which pivotally support the first and second pivot shafts and include first and second attachment shafts, respectively;
• a hollow frame formed by a hollow member, which couples the pivot holders to each other;
• a drive source fixed to the hollow frame;
• a drive link rod which transmits drive force of the drive source to the first pivot shaft;
• and
• a synchronization link rod which further transmits drive force of the drive link rod to the second pivot shaft;
• wherein the hollow frame includes first and second coupling-fixing portions, which are respectively fixed to the first and second pivot holders, and a drive source fixing portion, which is arranged between the first and second coupling-fixing portions and fixed with the drive source;
• the hollow frame is bent so as to arrange the drive source fixing portion spaced apart from the first and second pivot holders in a direction extending from the distal ends towards basal ends of the pivot shafts;
• and
• the hollow frame includes a first crank portion, which is bent to be crank-shaped and extends between the drive source fixing portion and the first pivot holder, the first crank portion including first and second bent sections respectively bent about bending axes, which are not parallel to each other.