Patent ID: 7997939

Claim:
A plug, comprising a plug housing and a metal terminal group, wherein the metal terminal group comprises a mating electrode group on a first end of the metal terminal group and a connection electrode group on a second end of the metal terminal group, the mating electrode group including mating electrode sections that are disposed with an insulator interposed therebetween and that are to be in contact with contacts of a mating jack, the connection electrode group including connection electrode sections that are disposed with an insulator interposed therebetween and that are to be connected to electrodes of a connection member, the mating electrode sections are disposed coaxially with an axis of the plug, at least two of the connection electrode sections are disposed around the axis so as to surround the axis, such that one of the connection electrode sections surrounds the other connection electrode section, wherein the metal terminal group further comprises first to fourth metal terminals, first, second, third, and fourth mating electrode sections are disposed in the stated order from a rear side of the mating electrode group to a front side thereof, the first metal terminal has a largest diameter and has a rear end serving as a first connection electrode section that is disposed in a front end of the connection electrode group, the second metal terminal has a second largest diameter and has a rear end in which is formed a cut-out portion, a second connection electrode section is a remaining portion of the rear end of the second metal terminal, and is disposed on a rear side of the first connection electrode section, the third metal terminal has a second smallest diameter and has a rear end serving as a third connection electrode section that is disposed in the cut-out portion, the fourth metal terminal has a smallest diameter and has a rear end serving as a fourth connection electrode section that is exposed at a rear end of the connection electrode group, an axial step portion is provided between the first connection electrode section and each of the second and third connection electrode sections, radial step portions are provided between the second and third connection electrode sections, and another axial step portion is provided between the fourth connection electrode section and each of the second and third connection electrode sections.