Patent ID: 7400158

Claim:
A test fixture comprising: a base having a top and a bottom and further having a recess defined in the top of the base and having an inner bottom surface; and multiple inner mounting holes defined in the inner bottom surface of the recess; a positioning board mounted in the recess and having multiple lower probe holes defined through the positioning board; and multiple spring holes defined through the positioning board; multiple probes mounted on the positioning board and each probe having a top contacting end and a bottom end mounted respectively in the lower probe holes in the positioning board; a cushion board mounted and being capable of sliding up and down in the recess and having a seat having a top surface and an annular frame mounted on the seat; a socket hole defined through the annular frame in the cushion board and having an inner bottom surface; multiple upper probe holes defined through the seat of the cushion board, communicating with the socket hole, slidably mounted respectively around the probes and selectively protruding the probes into the socket hole; multiple inner mounting holes defined through the seat of the cushion board; and multiple oil-free bearings mounted respectively in the inner mounting holes in the cushion board; multiple springs mounted respectively in the spring holes in the positioning board between the inner bottom surface of the recess and the cushion board and pressing against and biasing the cushion board upward; and multiple inner bolts slidably mounted respectively through the inner mounting holes in the cushion board, slidably mounted respectively through the oil-free bearings, mounted respectively through the springs and securely mounted respectively in the inner mounting holes in the base.