PROBLEM TO BE SOLVED: To provide forceps having a multi-joint structure which can be actuated without backlash by springs arranged in a pair of jaw members respectively and by a spring arranged across a tip outer cylinder and a base end outer cylinder, and which is used in medical equipment, is small-sized, has an excellent handling property, is rich in followability, and can be actuated highly accurately.SOLUTION: Forceps having a multi-joint structure include: a tip outer cylinder 1 and a base end outer cylinder 2 connected so as to be bent and a grip member 7 including a pair of jaw members 8 connected at a tip 14 of the tip outer cylinder 1. The jaw members 8 are actuated so as to be opened/closed by a pair of jaw power transmission shafts 9. The jaw members 8 are energized in a closing direction by springs 11 at all times. The tip outer cylinder 1 and the base end outer cylinder 2 are actuated so as to be bent by an outer cylinder power transmission shaft 10. The tip outer cylinder 1 and the base end outer cylinder 2 are energized in a straight direction at all times by a spring 12.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2017,JPO&INPIT【課題】この多関節構造の鉗子は,一対の爪部材にそれぞれ設けたばね,及び先端外筒と基端外筒にかけ渡されたばねによってガタの無い作動ができ,医療用機器に使用して小形で取り扱い易く,追従性に富み,高精度で作動できる。【解決手段】この多関節構造の鉗子は,先端外筒1と基端外筒2とを折曲可能に連結し,先端外筒1の先端部14に一対の爪部材8から成る把持部材7を連結する。爪部材8は,一対の爪動力伝達軸9で開閉作動され,ばね11によって爪部材8が閉鎖方向に常時付勢されている。先端外筒1と基端外筒2とは,外筒動力伝達軸10によって折曲作動され,ばね12によって先端外筒1と基端外筒2が真直方向に常時付勢されている。【選択図】図2
