A braking regulation body 30 is disposed between a bending drive shaft 25 and a lock operation shaft 26 so as to be perpendicular to rotation axes. The braking regulation body 30 is configured so as to comprise: an intermediate member 31 making contact with the cam section 26a of the lock operation shaft 26 and a braking member 40 for applying pressing force to the bending drive shaft 25, the pressing force corresponding to the displacement of the intermediate member 31. The intermediate member 31 is formed by joining a shaft body section 32 and a cylindrical sliding section 33 by means of threads. Rotating the knurled surface of the outer periphery of the sliding section 33 by means of a tweezer or the like while the shaft body section 32 and the sliding section 33 are joined by means of the threads enables the distance between the base end and front end of the intermediate member 31 to be changed and adjusted, and consequently, when fixation force relative to the bending drive shaft 25 is decreased, the affixation force can be restored by re-adjusting the distance between the base end and front end of the intermediate member 31.Linvention concerne un corps de régulation de freinage 30 qui est disposé entre un arbre dentraînement de cintrage 25 et un arbre dactionnement de verrou 26 de façon à être perpendiculaire à des axes de rotation. Le corps de régulation de freinage 30 est conçu pour comprendre : un élément intermédiaire 31 entrant en contact avec la section de came 26a de larbre dactionnement de verrou 26 et un élément de freinage 40 pour appliquer une force de pression sur larbre dentraînement de cintrage 25, la force de pression correspondant au déplacement de lélément intermédiaire 31. Lélément intermédiaire 31 est formé par liaison dune section de corps darbre 32 et dune section de coulissement cylindrique 33 au moyen de filetages. La rotation de la surface moletée de la périphérie extérieure de la section de coulissement 33 au moyen de pinces ou analog
