| 摘要 |
A towing device for selectively locking a towing load has a support member that pivotably supports a link member at a first pivotal point near the first proximal end. A stopper is located on the support member for regulating a pivotal movement of the link member. A joint member is pivotably coupled to the link member near the first proximal end at a second pivotal point and has a tendency to pivot about the second pivotal point toward the first pivotal point to contact the stopper as the first proximal end pivots toward the stopper about the first pivotal point. A coupling member is connected to the second distal end of the joint member. An interference avoiding unit is located near the joint member for guiding the joint member to maintain a certain distance from the stopper as the link member pivots about the first pivotal point.
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