| 摘要 |
PURPOSE:To prevent misinsertion by providing misinsertion preventing plates, and so constituting these that the positioning holes where the best connection is obtainable are fitted to positioning dowels by press-fitting and fixing the studs thereof. CONSTITUTION:Misinsertion preventing plates 10a and 10b are formed in a ring shape, and one side of the misinsertion preventing plate 10a is provided with projection like studs 11a disposed at a number less by 1 than the number of the positioning holes 6a provided to the flange 5b of a plug 2a in such a manner as to permit press-fitting and fixing to the positioning holes 6a. Likewise, the other one side is provided with studs 11b. If the studs 11a, 11b of the misinsertion preventing plates 10a, 10b are press-fitted and fixed into the positioning holes 6a, 6b other than the positioning holes 6a, 6b where connection losses become minimum when the plugs 2a, 2b are inserted into the insertion holes 7 of an adapter 3 and are butted, they may be fitted always to the positioning dowels 9a, 9b. With such constitution, misinsertion may be prevented. |
