Patent ID: 7931496

Claim:
An electrical connector of a square shape having a housing of a front face attachment type to be attached to a front face of a panel, wherein the housing comprises a front portion and a rear portion, wherein the panel comprises a mounting opening of rectangular shape through which the rear portion of the housing is inserted in a direction substantially orthogonal to the front face of the panel, wherein the rear portion of the housing includes: a boundary step abutting a periphery of the front face of the mounting opening; a lance arranged adjacently to the boundary step, in which an end thereof joins a first external wall of the housing, and a tip thereof extends away from the first external wall in a direction parallel to the front face of the panel; and a plurality of flanges arranged discontinuously around the housing to oppose the boundary step, wherein the mounting opening includes: a plurality of concave portions notched toward a panel thickness face of the panel through which the lance and the plurality of flanges are inserted; and a plurality of convex portions, where the plurality of flanges abuts the rear face of the panel when the housing is moved in a first direction along the front face of the panel, and wherein the plurality of convex portions includes a locking piece that locks the tip of the lance when the housing is moved in the first direction along the front face of the panel, such that the housing is difficult to move in a second direction.