Patent ID: 6595804
Filing Date: 2003-07-22
Classification: H01R

Abstract:
A multipolar jack having:a body; a body main portion which is formed integrally with said body; a cylindrical portion which protrudes forwardly from said body main portion; a multipolar plug defining a shaft and a plurality of main electrodes longitudinally arranged on said shaft; a plurality of main electrodes which are disposed inside said body, electrical connection to said plurality of main electrodes of said multipolar plug, respectively, said multipolar plug being insertable through said cylindrical portion to a position concentrical with or substantially concentrical with said cylindrical portion, said multipolar jack, comprising: a large-diameter portion which is on a side of a basal portion forming said cylindrical portion; a small-diameter portion which protrudes from a front end of said large-diameter portion; a step which is stepwise formed in a boundary between said large-diameter portion and said small-diameter portion; a first additional electrode which is placed outside said large-diameter portion, and in which a contact is positioned in the rear of said step to be in contact with a contact on a side of an inner face of a first annular electrode disposed in a periphery of said shaft of said multipolar plug; and a second additional electrode placed outside said small-diameter portion, and in which a contact is positioned in front of said step to be in contact with a contact on a side of an inner face of a second annular electrode concentrically disposed in a periphery of said shaft of said multipolar plug and inside said first annular electrode.