An elongate tubular body having an open forward end and give as the treatment current in use, and a, and an electrode assembly including a treatment electrode having a patient contact area at the front end and the electrode assembly, the tubular of the incorporated in the body, and the storage position of the patient contact area of the electrode is protected in the elongate tubular body, and said patient contacting area is movable between at least one extended position projecting from said opening There, the having a biasing structure in which the electrode assembly is biased to the storage position, and a latch structure for latching the electrode assembly to the at least one extended position, electrosurgical instrument. .BACKGROUND 8前方端に開口を有する細長い管状の本体と、使用に際して処置電流が通り得、かつ、前方端に患者接触領域を有する処置用電極を含む電極アセンブリと、を有し、前記電極アセンブリは、前記管状の本体内に組み入れられ、前記電極の患者接触領域が前記細長い管状の本体内に保護される収納位置と、前記患者接触領域が前記開口から突出する少なくとも1つの延長位置との間で移動可能であり、前記電極アセンブリを収納位置へと付勢する付勢構造と、前記電極アセンブリを前記少なくとも1つの延長位置に係止するラッチ構造と、を有する、電気外科用器具。【選択図】図8
