| 摘要 |
Spectacles include an optical or solar façade connected to two sidepieces which are each connected to the façade by a shaft which is substantially perpendicular to the façade and which is used to rotate each sidepiece about itself between a use position and a storage position in front of the façade having a radius of curvature substantially equal to that of the sidepiece. The sidepiece is divided into two portions, namely a first portion solidly connected to the central rotational shaft and a second portion connected to the first by an intermediate translational movement device disposed between the two portions and gradually engaging the second portion during the rotation of the first and consequently the second so as to subject the latter to two combined movements, one rotational and the other linear, for the automatic and simultaneous lengthening of the sidepiece as it is rotated to the use position and the shortening of the sidepiece as it is rotated to the storage position.
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