US 11,653,823 B2
Endoscope
Takashi Harada, Kanagawa (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on Jun. 18, 2020, as Appl. No. 16/905,867.
Application 16/905,867 is a continuation of application No. PCT/JP2018/047059, filed on Dec. 20, 2018.
Claims priority of application No. JP2018-012781 (JP), filed on Jan. 29, 2018.
Prior Publication US 2020/0315428 A1, Oct. 8, 2020
Int. Cl. A61B 1/005 (2006.01); A61B 1/00 (2006.01); A61B 1/01 (2006.01); A61B 1/018 (2006.01)
CPC A61B 1/0057 (2013.01) [A61B 1/00006 (2013.01); A61B 1/00066 (2013.01); A61B 1/00087 (2013.01); A61B 1/00112 (2013.01); A61B 1/00137 (2013.01); A61B 1/01 (2013.01); A61B 1/018 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An endoscope comprising:
a hand operation unit that comprises an operation member;
an insertion unit of which a proximal end portion is connected to the hand operation unit;
a distal end member that is provided at a distal end part of the insertion unit;
a treatment tool-elevator that is mounted on the distal end member so as to be rotationally movable and is rotationally movable in a rotational movement range from an elevated position up to an attachment/detachment position beyond a fallen position;
an elevating operation wire of which a distal end side is connected to the treatment tool-elevator and a proximal end side is connected to the operation member and which is pushed or pulled according to an operation of the operation member to cause the treatment tool-elevator to be rotationally moved in the rotational movement range between the elevated position and the fallen position;
an engaging portion that is provided at a distal end portion of the elevating operation wire;
an inlet which is provided on the hand operation unit and through which the elevating operation wire is introduced so that the engaging portion becomes a leading end;
an outlet which is provided at the distal end member and out of which the elevating operation wire is led so that the engaging portion becomes the leading end;
a wire insertion channel that is provided in the insertion unit and allows the inlet and the outlet to communicate with each other;
a contact portion that is provided on the treatment tool-elevator and applies a rotational moving force acting in a fallen direction to the treatment tool-elevator in a case where the engaging portion led out of the outlet is in contact with the contact portion;
a housing portion which is provided on the treatment tool-elevator and in which an opening for housing the engaging portion is formed; and
a wall portion that is provided at a position adjacent to the treatment tool-elevator and facing a movement trajectory of the engaging portion in a case where the treatment tool-elevator is moved between the elevated position and the fallen position in a state where the engaging portion is in contact with the contact portion,
wherein in a state where the engaging portion is in contact with the contact portion, the wall portion regulates movement of the engaging portion in a direction where the engaging portion enters the opening in a case where the treatment tool-elevator is present between the elevated position and the fallen position and allows movement of the engaging portion in the direction where the engaging portion enters the opening in a case where the treatment tool-elevator is present between the fallen position and the attachment/detachment position.