| 摘要 |
A pull cord stopper device (20) for use in a blind apparatus operative in response only to a cord control string attached to pull cords. The pull cord stopper device (20) is disposed in a head box (10) and is adaptive to a large-scale blind apparatus. A stopper case (28) of the pull cord stopper device (20) comprises a comb portion (40) for separating the pull cords (16), a knurled portion (42) for guiding a pinch roller (30), and a pin (54) received in a guide groove (52) formed in a switch member(34), for guiding the movement of the switch member (34). A slidable block (32) rotatably supports the pinch roller (30), and is operative to move within the stopper case (28) in the direction of movement of the pull cords (16) as a result of a rotation of the pinch roller (30). The slidable block (32) supports the switch member (34) which is integrally movable with the pull cords (16) in a direction of its travel, and, at the same time, supports the switch member (34) in a manner that it is relatively movable in a direction transverse to the travel of the pull cords (16). A resilient member (36) is operative to restrain the pull cords (16) by pinching them between a pressure member (38) and the pinch roller (30). The resilient member (36) constantly urges the slidable block (32) such that the pull cords (16) are pinched between the pinch roller 30 and the pressure member (38).
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