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    • 6. 发明专利
    • WIPER UNIT
    • JPS5893652A
    • 1983-06-03
    • JP19071781
    • 1981-11-30
    • JIDOSHA DENKI KOGYO KK
    • MOURI YOUICHIHIRANO KOUKIFURUYA TAKEOTAKAHASHI YUUJI
    • B60S1/34
    • PURPOSE:To make it possible to vary the pressure contact force of a wiper blade by a method wherein a spring for urging a wiper arm is held in engagement with a screw rod fitted in a wiper arm head and the distance between the spring and a pivot shaft of the wiper arm is varied. CONSTITUTION:A male screw 9 is threaded into the wiper arm head 3 in the direction of the axis 1 of the wiper and a reched wheel 10 is connected integrally to the lower end of the male screw 9. Further, one end of a spring piece 11 of a tension spring 6 adopted to apply a load to the wiping surface of the wiper blade is fitted into a neck 9a of the male screw 9. The male screw 9 is rotated by a drive motor 12 through the ratchet wheel 10. The drive motor 12 comprises a base member 14 pivotally mounted on a shaft 13 fixed to the body 2 of an automobile and claws 16a and 16b pivotally fixed to the base member 14 and urged against the member 14 through springs 18a dnd 18b. Thus the ratched wheel 10 is rotated by the claws 16a and 16b by rocking an arm 17 attached to the base member 14 to the right and to the left, through a wire cable 19.