Endoscope head and endoscope provided therewith
The invention relates to an endoscope head including an endoscope head body in which at least one working channel is formed, wherein a pivotable Albarran lever is provided distally of the distal end of the working channel, wherein, on the endoscope head body, a pivot member actuatable from the proximal side is provided for pivoting the Albarran lever, wherein a pulling wire channel extends in the endoscope head body and has a pulling wire for actuating the pivot member guided therein, wherein the pivot member has a protrusion, and wherein the pulling wire is capable of displacing a sliding member having a surface on which the protrusion is supported, so that the pivot member is rotated by displacing the sliding member.
1. An endoscope head comprising an endoscope head body in which a working channel is formed, the endoscope head body comprising:
a pivotable Albarran lever provided distally of a distal end of the working channel;
a pivot lever having a protrusion and which is actuatable from a proximal side of the working channel and which is configured to pivot the Albarran lever;
a pulling wire sleeve extending through a pulling wire channel and having a proximal end and a distal end, the pulling wire sleeve being slidable along an axial direction of the endoscope head body;
a pulling wire extending through the pulling wire sleeve and fixed along the axial direction of the endoscope head body; and
slider having a surface on which the protrusion is supported and connected to the distal end of the pulling wire sleeve, wherein when the pulling wire sleeve is pulled from the proximal end in the axial direction of the endoscope head body, the pulling wire sleeve displaces the slider relative to the pulling wire such that the pivot lever is rotated by the displacement of the slider.
2. The endoscope head according to claim 1 , wherein
the protrusion of the pivot lever has a shape of an involute which is supported on the surface of the slider in a rolling manner.
3. The endoscope head according to claim 1 , wherein
the slider has a first surface on which a first outer surface of the protrusion is supported, and
the slider has a second surface on which a second outer surface of the protrusion is supported.
4. The endoscope head according to claim 3 , wherein the slider is configured such that,
when the pulling wire sleeve is moved in a proximal direction of the endoscope head body, the first surface of the slider has the first outer surface of the protrusion to roll thereon in such a way that the pivot lever pivots the Albarran lever in a first direction, and,
when the pulling wire sleeve is moved in a distal direction of the endoscope head body, the second surface of the sliding member slider has the second outer surface of the protrusion roll thereon in such a way that the pivot lever pivots the Albarran lever in the a second direction.
5. The endoscope head according to claim 3 , wherein,
at the slider, the first surface and the second surface face each other and,
at the protrusion, the first outer surface and the second outer surface face in opposite directions.
6. The endoscope head according to claim 1 , wherein, the slider is displaceable back and forth by the pulling wire sleeve exclusively in the axial direction of the endoscope head.
7. The endoscope head according to claim 1 , wherein
a distal end of the pulling wire channel is sealed at the endoscope head body.
8. The endoscope head according to claim 1 , wherein
a distal end of the pulling wire is anchored to the endoscope head body at an anchoring point, and
the sliding member slider is arranged at the pulling wire proximally of the anchoring point.
9. An endoscope comprising the endoscope head according to claim 1 .