Flexing structure with cutouts for a medical device

A flexing structure configured for an insertion tube of a medical device, the flexing structure comprising tubular vertebrae with a proximal tubular vertebra and a distal tubular vertebra and at least one actuating cable surrounded by a sheath over at least part of its length, the flexing structure comprising a tube cut with energy-beam cutting lines configured to create tubular vertebrae that nest in one another via cut-out areas forming pivots for rotation around pivot axes, cutting lines configured to delimit, between the tubular vertebrae, notches cut in the tube configured to form flexing zones for the tubular vertebrae to obtain the flexing of the flexing structure in at least one flexing plane perpendicular to the pivot axes, the proximal tubular vertebra comprising, for each actuating cable, a radial and axial blocking system for the sheath, comprising an elongate cutout configured to delimit two stop edges that limit the radial engagement of the sheath in the cutout, this the cutout opening at its distal part into a slot delimited by at least two cutout lines between which there is attached a pressing tab configured to press the sheath radially against the two stop edges of the cutout, this slot being bordered by a rim configured for axially stopping the sheath, on which the distal end of the sheath is pressed.