VIDEO ENDOSCOPE HAVING AN ADJUSTABLE VIEWING DIRECTION

摘要

A video endoscope having a handgrip and shaft having a cladding tube, wherein a prism unit having at least two prisms is connected to the cladding tube, wherein at least one distally arranged prism is rotated to modify a viewing angle around a rotation axis, an inner positioning system that comprises at least one rotational body arranged on a rotation axis of the shaft, axially fastened, and rotatable around the longitudinal axis of the shaft, to the distal tip of which the at least one image sensor is fastened, and at least one axially movable translational body, wherein a drive device is configured such that upon actuating a first control element, only the rotational body is rotated, and upon actuating a second control element, the translational body is moved and the rotational body is rotated such that a horizon position of an image formed on the image sensor remains constant.

主权项

1. A video endoscope having an adjustable viewing direction, the video endoscope comprising:
a proximal handgrip; an endoscope shaft, the endoscope shaft having a cladding tube connected to the handgrip in a rotationally fixed manner, wherein in the endoscope shaft:
a prism unit having at least two prisms is connected distally to the cladding tube in a rotationally fixed manner;at least one image sensor is arranged proximally behind the prism unit;at least one distally arranged prism of the prism unit is rotated about a rotation axis crosswise to the longitudinal axis of the endoscope shaft to modify a viewing angle; andthe prism unit and the at least one image sensor are arranged in a hermetic chamber within the cladding tube that extends out of the endoscope shaft into the handgrip; a first control element for setting a horizon position of an acquired image arranged outside of the hermetic chamber; and a second control element for setting the viewing angle of the rotatable prism arranged outside of the hermetic chamber, wherein in the hermetic chamber an inner positioning system is arranged which comprises at least one rotational body arranged on a central rotation axis of the endoscope shaft, axially fastened, and rotatable about the longitudinal axis of the endoscope shaft, to the distal tip of which is fastened the at least one image sensor; at least one axially movable translational body is connected in a distal end section of the endoscope shaft to a gear mechanism that converts a translational movement of the translational body into a rotation of the at least one rotatable prism; and a drive device comprising a first control element and a second control element to move the rotational body and the translational body, wherein the drive device is configured such that upon actuating the first control element, only the rotational body is rotated, and upon actuating the second control element, the translational body is moved and the rotational body is rotated such that a horizon position of an image formed on the at least one image sensor remains constant.