| 摘要 |
A jack facilitates the patching of one or more external circuits into an electrical line. In the normal condition, the electrical line maintains continuity through the use of a pair of metal springs which make connections between pairs of contacts. Each spring has a rounded projection and a rounded depression. The depressions serve as pivot points for the springs. When one applies pressure to the rounded projection, such as by inserting a prong of a male plug over the spring, the spring pivots and breaks the electrical connection with one of the contacts. Moreover, the positions of the rounded projections of the two springs correspond to the positions of tip and ring portions of the prong, thereby connecting the springs respectively to the tip and ring portions. Thus, insertion of the male plug breaks the continuity of the line and connects the line to an external circuit, while removal of the plug restores the continuity of the line.
|
