Patent ID: 7445515

Claim:
An audio jack, comprising: an insulating housing, having a mating wall, a rear wall opposite to the mating wall, a top wall and two sidewalls, an inserting cavity defined to pass through the mating wall and extend toward the inner of the insulating housing, the rear wall defining a through-hole passing therethough and communicating with the inserting cavity and the outside, the sidewalls defining contact cavities, and a mating contact cavity defined on the rear wall and communicating with the through-hole; a center pin, having a connecting portion received in the inserting cavity, an end of the connecting portion extending to form an engaging portion accommodated in the through-hole, the engaging portion defining a clipping groove thereabout, the clipping groove surrounding a positioning portion; contacts, including signal contacts and a mating contact, the signal contacts inserted in the contact cavities respectively, the mating contact having a secure portion received in the mating contact cavity defined on the rear wall of the insulating housing, the secure portion defining a locating gap thereon passing through the bottom thereof, the locating gap engaging with the positioning portion of the center pin; wherein the secure portion forms a protrusion disposed around the locating gap, a part of the protrusion is received in the clipping groove of the center pin and the remaining part of the protrusion is exposed out of the clipping groove and visible from the through-hole of the insulating housing.