| 摘要 |
A motor-vehicle accessory having a pivotal element that can pivot about an axis on a generally fixed support element is provided with a mechanism having an extension on one of the elements offset from the axis and projecting angularly of the axis and a brake on the other of the elements. This brake has a pair of brake shoes flanking the extension and shiftable between a clamping position gripping the element and preventing movement of the element relative to the brake in at least one angular direction and a release position permitting movement of the element relative to the brake both in and against the one direction.
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