Socket

Abstract

A socket includes: a contact probe; and an insulating support body supporting the contact probe. The contact probe includes: a first plunger to be connected with an object to be inspected; a second plunger to be connected with an inspecting board; and a spring configured to urge the first plunger and the second plunger in a direction apart from each other. In a state where a tip end of the first plunger is released, a projecting amount of the second plunger from the insulating support body is zero with a natural length of the spring.

What is claimed is: 
     
         1 . A socket comprising:
 a contact probe; and   an insulating support body supporting the contact probe, wherein   the contact probe includes:
 a first plunger; 
 a second plunger; and 
 a spring configured to urge the first plunger and the second plunger in a direction apart from each other, 
   in a state where a tip end of the first plunger is released, the second plunger is configured not to be projected from the insulating support body,   the spring is loaded in the contact probe, in a state where movements of the first plunger and the second plunger in the direction apart from each other are limited, without depending on the insulating support body, and   one of the first plunger and the second plunger includes a rod-shaped part which passes through the spring, and the other of the first plunger and the second plunger is provided with a lock part which is engaged with the rod-shaped part.   
     
     
         2 . The socket according to  claim 1 , wherein,
 an urging force of the spring is equal to or less than 10 gf, in a state where the tip end of the first plunger is released, and the second plunger is not projected from the insulating support body.   
     
     
         3 . The socket according to  claim 1 , wherein,
 an urging force of the spring is equal to or less than one third of an urging force of the spring at a time of inspection, in a state where the tip end of the first plunger is released the second plunger is not projected from the insulating support body.   
     
     
         4 . The socket according to  claim 1 , wherein
 the first plunger is connected with an object to be inspected, and   the second plunger is connected with an inspecting board.