Patent ID: 8715015

Claim:
A spring contact having an upper contact pin, a lower contact pin and a spring, comprising: an upper contact pin including: a contact portion of a predetermined shape, a head, a neck, a body, two spring holding protrusions that are provided in left and right sides of the body so as to limit a length of an assembled spring, and two elastic portions that are provided at locations below the body; a lower contact pin that is coupled to the upper contact pin in such a way that the upper and lower contact pins cross each other at right angles, the lower contact pin including: a contact portion of a predetermined shape, a head, a neck, a body, two spring holding protrusions that are provided in left and right sides of the body so as to limit the length of the assembled spring, and two elastic portions; and the spring fitted over an assembly of the lower contact pin and the upper contact pin at a position between the two contact pins, wherein an end of each of the two elastic portions of the upper contact pin and the lower contact pin has a thickness (t 1 ) that is less than a thickness (t) of the body, with oblique surfaces, locking protrusions and locking protrusion contact surfaces being symmetrically formed in respective ends of the two elastic portions; a moving slit is defined between the two elastic portions so as to form a moving space when the upper contact pin and the lower contact pin are coupled to each other while crossing at right angles, with a stop surface being formed on an end of the moving slit so that, when the upper contact pin is compressed against the lower contact pin with a maximum force, the stop surfaces of the two contact pins come into contact with each other and stop the compression; and moving grooves are formed in the body of each of the lower and upper contact pins so that the locking protrusions of the lower and upper contact pins can be moved along and stopped by the moving grooves and the locking protrusion contact surfaces of the lower and upper contact pins can be brought into electric contact with the moving grooves, the moving grooves being formed on upper and lower surfaces of each of the lower and upper contact pins, in which first ends of the moving grooves of each of the lower and upper contact pins have a stop hole that forms a stop bridge for stopping the locking protrusions of an opposite contact pin, and second ends extend in a direction toward the contact portion after passing through spring holding surfaces of the two spring holding protrusions that function to limit the length of the assembled spring and to prevent the spring from undesirably becoming displaced.