| 摘要 |
A compact and thin wire-driving device for a window regulator which absorbs elongation of wire automatically, wherein both ends of a driving wire 8 are wound round two pulleys arranged parallel, i.e. a first pulley 3 and a second pulley 7, in the same direction; a first gear 4 is secured coaxially to the first pulley 3; a second gear 6 is adjacent coaxially to the second pulley 7 through ratchet teeth 6b, 7b; the first gear 4 and second gear 6 are meshed to each other; and, when the wire is wound up round the first pulley 3, a slack of the wire is wound up round the first pulley 3 and the second pulley 7 remains stopped. The geared pulleys are contained in a casing 1 and the first pulley 3 is driven through a lever 9. When the wire 8 elongates to loosen the tensile force, the lever 9, a first shaft 2, the first pulley 3, the first gear 4 and the second gear 6 are rotated, but the second pulley 7 is not rotated by the braking forces of a wave washer 10 and a spiral spring 13, until the tensile force of the wire 8 overcomes these braking forces. <IMAGE> |
