Surface-mountable connector with structure permitting to easily check flatness of contact terminals by use of a gauge and the gauge

Abstract

A connector ( ) comprises an insulator ( ) and four rows of contacts ( ). The insulator ( ) has a shape of an almost rectangular parallelepiped and has two cut-off like shaped edges ( B) and a groove ( C). The cut-off like shaped edges ( B) are provided on a lower side in an X-direction and on opposite sides in a Y-direction perpendicular to the X-direction. The groove ( C) is provided on a lower surface ( F) of the insulator ( ). The cut-off like shaped edges ( B) and the groove ( C) straightly extend in a Z-direction perpendicular to the X- and Y-directions. Each of the contacts ( ) has a curved portion ( B) and a flat terminal end portion ( C). The curved portions ( B) and the flat terminal end portions ( C) of the contacts ( ), which belong to two rows nearest the side surfaces ( E), are positioned within the cut-off like shaped edges ( B). The other curved portions ( B) and the other flat terminal end portions ( C) are positioned within the groove ( C). All of the flat terminal end portions ( C) are normally on the same level. To check this, the gauge ( ) is used. During the check, the connector ( ) is slid on the upper surface ( A) of the gauge while the flat terminal end portions ( C) are inserted into the respective gaps ( B C D D ) of the gauge ( ). If one of the flat terminal end portions ( C) collides with side projections ( B C D D ) of the gauge ( ), the connector ( ) is judged as a defective one.