US Patent 9632330 Eyewear with locking lens frame

A lens frame locking mechanism comprises a temple and a link member. The temple is pivotally coupled to a periphery of the lens frame, for example at a first pivot attachment. The link member is pivotally coupled to the temple and to the periphery of the lens frame, for example at second and third pivot attachments. The temple is configured to pivot with respect to the lens frame about the first pivot attachment, and the link member pivots into a locking position defined with respect to the periphery of the lens frame.