hingeless frame

rigid frame

A structural framework in which all columns and beams are rigidly connected; there are no hinged joints and the angular relationship between beam and column members are maintained under load.
References in periodicals archive ?
The most high-profile pair is a futuristic wrap from Oakley that tightly fits the face and has a hingeless frame for athletes who don't like anything pinching their ears.
OVERTHETOP(TM), the new eyewear technology which debuted on top athletes at the 2000 Olympic Games in Sydney, Australia, features a hingeless frame that wraps the upper cranium and anchors beneath the posterior occipital protuberance of the skull.
Reinventing the concept of eyewear, the company has created a hingeless frame that wraps the upper cranium and anchors beneath the posterior occipital protuberance of the human skull.