Patent ID: 9291645
Filing Date: 2016-03-22
CPC Classification: G01R,G09G

Claim Text:
1. A probe unit contacting an electrode of a contacted body and an electrode of a contact target at both ends in a longitudinal direction, the probe unit comprising: a plurality of conductive contact probes, each contacting the electrode of the contacted body at one end in the longitudinal direction; and a probe holder accommodating the plurality of contact probes, wherein each of the contact probe includes: the probe holder is made of a conductive material and includes a plurality of holder holes, each having a stepped shape in which diameters at both ends in a thickness direction are decreased and accommodating the respective contact probes, and the flange portion abuts one of step portions of the stepped shape, one end of the spring coil abuts the flange portion, another end of the spring coil abuts another one of the step portions such that the spring coil biases the plunger, the plunger is configured to abut an inner wall surface of the holder hole when a load is applied to the plunger so as to electrically connect the contacted body and the contact target via the probe holder, and the spring coil is made of a conductive material having a higher resistance than the plunger or made of an elastic and insulating material.