Patent ID: 7267548

Claim:
Supporting device for an interdental cleaning means, comprising: a handle; and a tightening head of an elongated appendix portion of an interdental cleaning brush, said tightening head comprising a central supporting body and a tightening bush rotatably mounted on the central body, the central body comprising i) a stem attached to the handle through a hinge joint that allows the tightening head to rotate with respect to the handle and ii) an axially symmetrical core, the bush being rotatably about the core, said bush having an internal surface complementary to a revolving surface of the core, the bush and the revolving surface of the core having the same symmetry axis and having the same rotation axis, the symmetry axis being coincident with the rotation axis, wherein, said bush and said revolving surface of the core comprise respective portions of a common hole for hosting said appendix portion, which hole extends in a first direction through said bush and said revolving surface and said hole is substantially parallel and offset with respect to the rotation axis of the bush, and in an inoperative condition of the bush the respective portions of the hole are aligned and extend in the first direction, and in an operative condition of the bush said respective portions each extend in the first direction and are non-aligned, out of the axis relative to each other so that the stem is retained by being clamped and deformed.