| 摘要 |
The invention relates to a screw fixation in the connection of two spectacle parts, in particular in the closing block or in hinging spectacle frames, there being provided as a plane, preferably a recess, for the screw head of the hinge screw a bore with a screw thread at one end and a screw head receptacle at the other end, and which enables releasing and connecting, as is necessary with spectacle frames for production and use. …<??>This is achieved when there is arranged in the plane or recess for the screw head a collar which preferably tapers off conically inwards and co-operates in a self-retaining fashion during screwing-in with a screw-in shoulder between the screw shank and screw head. …<IMAGE>… |
