Patent ID: 7086908

Claim:
A jack comprising: an insulating housing and a hollow columnar contact; wherein the insulating housing comprises: a plug connection opening into which a mating plug is inserted; a contact insertion chamber having an opening of the plug connection opening; and a contact insertion opening being disposed opposite to the plug connection opening, the contact insertion opening communicating with the contact insertion chamber; wherein the hollow columnar contact being conductive is inserted along an axial direction thereof into the contact insertion chamber from the contact insertion opening, wherein the jack holds a cylindrical main contact body of the hollow columnar contact at the contact insertion opening of the housing; wherein a press-fit pin is press-fitted inside the cylindrical main contact body, wherein the hollow columnar contact is a contact with a hollow and columnar shape, and is connected to a dedicated lead wire by crimping at a crimp part, wherein the hollow columnar contact comprises a pair of L-shaped tongues provided in a vicinity of a base part of the hollow columnar shape, the base part being provided toward the crimp part; and wherein the contact insertion opening, into which the hollow columnar contact is inserted along the axial direction, comprises; a first latching part being provided in a vicinity of the contact insertion opening, the first latching part engaging with the pair of L-shaped tongues and restrains the rotation of the hollow columnar contact about the axial direction; a second latching art to contact with the pair of L-shaped tongues as the hollow columnar contact is inserted into the contact insertion opening such that the hollow columnar contact is stopped at a predetermined position, wherein the hollow columnar contact further comprises a column connecting base part and an engaging base part in a vicinity of the base part of the hollow columnar contact toward the crimp part, wherein the contact insertion opening of the housing further comprises a third latching part for contacting with the engaging base part so as to prevent the hollow columnar contact from falling off the housing, wherein the press-fit pin comprises a small-diameter axial part having an outer diameter smaller than the inner diameter of the cylindrical main contact body, a large-diameter axial part having an outer diameter for a “medium fit” of fit quality with the inner diameter of the cylindrical main contact body, and a head part having an outer diameter larger than the outer diameter of the large-diameter axial part such that the outer diameter pushes and spreads the pair of L-shaped tongues, and wherein the small-diameter axial part, the large-diameter axial part, and the head part are arranged to be coaxial, and the press-fit pin is press-fitted into the cylindrical main contact body.