Contact pin and socket for electrical parts

A contact pin for a socket for an electrical part formed from a metal material having conductivity, comprising:

• a base portion;
• a stationary piece extending from the base portion and contacting the electrical part;
• and
• a movable piece extending from the base portion and contacting the electrical part,
• said movable piece comprising an elastic portion and a contact portion contacting the electrical part, said contact portion being polished.

A socket for an electrical part having a terminal comprising:

• a socket body to which an electrical part is mounted;
• an operation member provided for the socket body to be vertically movable in an operative state, said operation member being formed with a cam portion;
• a contact pin provided for the socket body, said contact pin being formed from a metal material having conductivity and comprising an elastic portion elastically deformable, a contact portion formed to a tip end portion of the elastic portion and adapted to contact the terminal of an electrical part, and an operation piece to be pressed by said cam portion of the operation member,
• said contact portion being polished by polishing means,
• said elastic portion being elastically deformed when the operation member is moved downward and the operation piece of the contact pin is pressed by the cam portion of the operation member to thereby separate the contact portion from the terminal of the electrical part.