| 摘要 |
The device disclosed comprises a combination of a side-member (4) pivoting on the upper part (1) of the frame, a restoring spring and an extension in the form of a hinged branch (8) which folds back through 90 DEG into a plane parallel to the lower edge (10) of the frame. The device is designed to permit positioning of the side-members in a plane parallel to the lower edge of the frame in order to reduce the space required and to allow the use of extremely flat spectacle cases.
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