Endoscope insertion cannula assembly.

摘要

An endoscope insertion cannula assembly (10) including an endoscope housing (14) and axially projecting body (16) having an endoscope tip (17). An adapter (22) is affixed about the endoscope housing (14), and a guide (24) is affixed about the adapter (22). A spring (32) and a seal (66) are also affixed about the adapter (22). The endoscope instrument (12), together with the associated adapter (22), spring (32) and guide (24), are inserted into a cannula housing (18). A pin (30) on the inside of the cannula housing (18) interacts with an angled slot (25) on the distal surface (28) of the guide (24) to rotate the endoscope instrument (12) into its proper rotational orientation A hole (361 in a cam surface (34) of the spring (32) then receives the pin (30) on the inside of the cannula housing (181 to control the axial orientation of the tip (17) of the endoscope instrument (12) with respect to the tip (21) of the cannula tube (20)