| 摘要 |
The basic model in Fig. 1 shows, after stamping, all the parts required for a metal spectacle centre part, eye rims (1), bridge (2), closure blocks (3), bow lugs (4), and cellular threaded joints (5), characterised in that all the parts are made from one piece. Other model forms are produced by mounting various cellular plastic parts (6 and 7) on the eye rims, as Fig. 2 and Fig. 3 show. The threaded joint (8) of the eye rim (1) is accommodated in the bridge (2) in Fig. 4. The metal parts not used in this model are milled off. In a model such as in Fig. 5, individual eye rims can be used with closure block (3), bow lug (4) and cellular threaded joint (5), characterised in that the eye rim is made with all its parts from one piece. <IMAGE>
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