| 摘要 |
A lockable cord pulling device includes a mounting member having a vertically extending abutment wall, and a pulley roller rotatably mounted on the mounting member, a pull cord trained on the pulley roller to form an underlying region that cooperates with the abutment wall to define a moving route oriented in a vertical direction, and a lock roller movable along the moving route. When the pull cord is pulled to bring the underlying region into frictional engagement with the lock roller, subsequent downward pulling of the pull cord in an upright direction to tense the underlying region will cause the lock roller to roll to a locked position, where the lock roller is stuck between the pulley roller and the abutment wall. The lock roller is allowed to fall into an unlocked position by virtue of gravity once the pull cord is pulled leftwards.
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