Propulsion assembly for endoscope

A propulsion assembly for an endoscope having a section of an elongated tube for entry in a tube of a body cavity, comprising:

• an endless track device for contacting a surface of said body cavity, and for propulsion by turning around in an axial direction of said elongated tube;
• a support sleeve for receiving said elongated tube therein, and supporting said endless track device movably;
• a distal cover frame, having a first through opening, for covering a distal side of said support sleeve in receiving said elongated tube in said first through opening;
• a first regulating portion, contained in said distal cover frame, for contacting a distal end of said endless track device, to regulate said endless track device in said axial direction;
• a proximal cover frame, having a second through opening, for covering a proximal side of said support sleeve in receiving said elongated tube in said second through opening;
• a second regulating portion, contained in said proximal cover frame, for contacting a proximal end of said endless track device, to regulate said endless track device in said axial direction;
• wherein at least one of said first and second regulating portions is a driving device, rotated by a drive source, for driving said endless track device.