| 摘要 |
<p>PROBLEM TO BE SOLVED: To invert a polarity of a connector terminal having a hollow cylindrical plug without separately preparing a connector for polarity inversion or the like.SOLUTION: First and second input electrodes and outer electrodes are arranged on an outer wall of a plug, an inner electrode is arranged on the inner side of the plug, and a plug side electrode for inversion which is electrically connected to the inner electrode is arranged on the outer wall of the plug. A cylindrical plug cover which is fit to the outer side of the plug so as to be slidable in a plug lengthwise direction is provided and an electrode group is arranged on its inner wall. A conduction path which connects the first input electrode and the outer electrode and a conduction path which connects the second input electrode and the plug side electrode for inversion when the plug cover is at a position P1 are formed. On the other hand, a conduction path which connects the first input electrode and the plug side electrode for inversion and a conduction path which connects the second input electrode and the first outer electrode when the plug cover is at a position P2 are formed.</p> |
