Patent ID: 9595773
Date: 2017-03-14
CPC Classifications: G01R,H01R

Claim:
1. A probe pin, comprising: a coil spring; a first plunger made from an electrically conductive material; and a second plunger made from an electrically conductive material, wherein the first plunger comprises: wherein the first elastic extension and the second elastic extension extend from the first major portion in parallel in a longitudinal direction of the first plunger, wherein the first elastic extension and the second elastic extension have different lengths in the longitudinal direction, wherein the first elastic extension and the second elastic extension have respective first and second inner surfaces opposing each other, wherein the first inner surface of the first elastic extension has a first contact portion, wherein the second inner surface of the second elastic extension has a guide projection projecting toward the first elastic extension, wherein the first contact portion and the guide projection are spaced away from each other in the longitudinal direction, wherein the second plunger comprises: wherein the first plunger is inserted in an inside of the coil spring from a first end of the coil spring, and the second plunger is inserted in the inside of the coil spring from a second end of the coil spring, and wherein the first plunger and the second plunger are combined with each other with the guide projection engaged in the guide slot and with the first contact portion forced in contact with the second contact portion, such that the first plunger is slidingly movable relative to the second plunger in the longitudinal direction while maintaining an electrical contact between the first and second contact portions of the first and second plungers.