| 摘要 |
PURPOSE: To accurately control a crank pin while restricting the noises by forming a first guide part of a crank formed of two parts and fixed to a motor driving shaft as a guide and slide part provided with a concentrical blocks in relation to the axis of the rotation of the crank. CONSTITUTION: A crank 12 formed of two parts 14, 16 connected to each other through a hinge 18 is fixed to a motor driving shaft 10, and a crank pin 20 is fixed to a rear end of a crank part 16. A wiper shaft 26 is interlocked with the pin 20 through a coupling bar 22 and an oscillator 24. The driving shaft 10 supports a plate 32 formed with a guide and slide part 34 for insertion of an extension part 21 of the crank pin 20 freely to be rotated, and a lever 44 supported by the plate 32 freely to be turned is provided between the plate 32 and the first crank part 14. The lever 44 is provided with a slider 56 working as a guide member, and this slider 56 is fitted in the guide and slide part 58 arranged in the crank part 14. |
