Patent ID: 6113586
Filing Date: 2000-09-05
Classification: A61B,Y10T

Abstract:
A joint mechanism connecting between a sheath and a manipulating section of an endoscopic treatment instrument, said joint mechanism comprising:a first insertion hole on an end of said manipulating section to be connected to said sheath, said first insertion hole having a first cross sectional shape; anda receptacle ring provided on said end of said manipulating section and rotatable between first and second positions relative to said end of said manipulating section, said receptacle ring having a second insertion hole aligned with respect to said first insertion hole, said second insertion hole having a second cross sectional shape;a joint on an end of said sheath to be connected to said manipulating section, said joint including an expanded portion having a third cross sectional shape, and a constricted portion having a fourth cross sectional shape and located between said expanded portion and said sheath;wherein a first common sectional shape defined cooperatively by said first and second cross sectional shapes when said receptacle ring is in said first position is substantially equal to or larger than said fourth cross sectional shape, and at least partially smaller than said third cross sectional shape; andwherein a second common sectional shape defined cooperatively by said first and second cross sectional shapes when said receptacle ring is in said second position is substantially equal to or larger than said third cross sectional shape.