US 12,185,911 B2
Treatment tool elevating mechanism and ultrasonic endoscope
Yasuhiko Morimoto, Kanagawa (JP); and Tsuneo Fukuzawa, Kanagawa (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on May 18, 2022, as Appl. No. 17/747,995.
Claims priority of application No. 2021-100120 (JP), filed on Jun. 16, 2021.
Prior Publication US 2022/0400934 A1, Dec. 22, 2022
Int. Cl. A61B 1/00 (2006.01); A61B 1/018 (2006.01); A61B 1/06 (2006.01); A61B 8/12 (2006.01)
CPC A61B 1/00098 (2013.01) [A61B 1/018 (2013.01); A61B 1/0623 (2013.01); A61B 8/12 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A treatment tool elevating mechanism comprising:
a rotary shaft portion that is supported so as to be rotatable about a rotation axis;
an elevator that is connected to one end of the rotary shaft portion so as to be rotatable integrally with the rotary shaft portion; and
an elevating lever that is connected to the other end of the rotary shaft portion so as to be rotatable integrally with the rotary shaft portion,
wherein a rotational force is applied to the elevating lever, and the rotational force is transmitted to the elevator through the rotary shaft portion,
at least one fitted member of the elevating lever or the elevator has a fitting recessed portion that is open in a direction of the rotary shaft portion,
the rotary shaft portion has a fitting protruding portion that is fitted into the fitting recessed portion so as to be non-rotatable relative to the fitting recessed portion, and
the fitting protruding portion has a center of gravity at a position eccentric from the rotation axis in a cross-section perpendicular to the rotation axis.