Patent ID: 7253647

Claim:
A probe for testing a test object with a high electric current, comprising: an outer pipe having a cylindrical configuration which is opened at upper and lower ends thereof; a plunger received in an upper part of the outer pipe and being slidably extendable out from and retractable into the outer pipe, and configured to contact with the test object for testing; a contact member installed in a lower part of the outer pipe and for connecting to a contact terminal of a circuit board; a spring disposed between the plunger and the contact member for elastically biasing the plunger with respect to the outer pipe; one of the plunger and the contact member having an insertion groove at a junction where the plunger and the contact member engage with each other, and the other one of the plunger and the contact member having a terminal portion configured to be slidably receivable in the insertion groove; and a plurality of contact wires extending along and installed at the insertion groove such that the plunger electrically connects with the contact member via the contact wires during at least when the plunger is slidably retracted; wherein the contact member includes the insertion groove formed at an upper part thereof, and at least a substantial portion of the plurality of contact wires are installed in the insertion groove, and a lower part of the plunger is configured to be slidably receivable in the insertion groove while contacting with the contact wires for enabling the electrical connection of the plunger with the contact member via the contact wires; wherein an upper end portion of the contact wires extend out from the insertion groove and are bent outwards and fixed at the contact member with a wire fastening ring attached at an outer periphery of the contact member.