Abstract: A treatment instrument insertion tool includes a main body section, an attachment portion configured to attach the main body section to an insertion section, a guide section that is connectable to a treatment instrument insertion port of an endoscope, and that is configured to guide a treatment instrument extending from the main body section into the insertion section through the treatment instrument insertion port, and an operation member that is provided on the main body section, that can fix the treatment instrument that is inserted in the main body section, by being at least partially elastically deformed, and that is configured to perform an operation of moving the treatment instrument forward or backward along a direction of an axis of the treatment instrument and an operation of rotating the treatment instrument around the axis in a fixed state in which the treatment instrument is fixed.

Abstract: A treatment instrument insertion tool includes a main body section, an attachment portion configured to attach the main body section to an insertion section, a guide section that is connectable to a treatment instrument insertion port of an endoscope, and that is configured to guide a treatment instrument extending from the main body section into the insertion section through the treatment instrument insertion port, and an operation member that is provided on the main body section, that can fix the treatment instrument that is inserted in the main body section, by being at least partially elastically deformed, and that is configured to perform an operation of moving the treatment instrument forward or backward along a direction of an axis of the treatment instrument and an operation of rotating the treatment instrument around the axis in a fixed state in which the treatment instrument is fixed.

Abstract: A holding mechanism includes a fixed holding portion and a rotary holding portion. The rotary holding portion switches the holding state of the holding mechanism by rotation to either a first state in which the rotary holding portion holds, together with the fixed holding portion, a guide member at the operation portion, or the second state in which the rotary holding portion fixes, together with the fixed holding portion, the guide member.

Abstract: A holding mechanism includes a fixed holding portion and a rotary holding portion. The rotary holding portion switches the holding state of the holding mechanism by rotation to either a first state in which the rotary holding portion holds, together with the fixed holding portion, a guide member at the operation portion, or the second state in which the rotary holding portion fixes, together with the fixed holding portion, the guide member.

Abstract: A holding mechanism has a first holding portion and a second holding portion. The first holding portion holds a part of an endoscopic guide member which is exposed to the outside of an endoscope. The second holding portion is disposed at a position different from that of the first holding portion. The second holding portion holds another part of the endoscopic guide member which is exposed to the outside of the endoscope, in an orientation different from an orientation of the first holding portion.

Abstract: In an endoscopic fluid passage changeover valve unit, a communication passage is formed in a shaft, the communication passage being opened to a hollow portion of a cylinder portion in an inside opening located on an outer peripheral surface of the shaft, and a seal member is provided at an angular position apart from the inside opening in circumferential directions of the cylinder portion. The shaft and the seal member are rotatable relative to the cylinder portion around a movement axis toward a position where a first upstream-side fluid passage is blocked by the seal member and toward a position where the inside opening of the communication passage faces the first upstream-side fluid passage.

Abstract: An endoscope includes: an insertion portion; an objective optical system; a treatment instrument raising base; and a restricting portion that restricts an angle at which the treatment instrument protrudes outside the insertion portion, wherein a straight line connecting the treatment instrument raising base and the objective optical system is substantially parallel to a longitudinal axis of the insertion portion, and the restricting portion is located on a line segment connecting the treatment instrument raising base and the objective optical system when the objective optical system is viewed from right in front, the restricting portion includes a restricting surface, and when the treatment instrument raising base is maximally inclined, an angle of a central axis of the treatment instrument with respect to the longitudinal axis which the insertion portion is inserted is equal to or smaller than an angle of the restricting surface with respect to the longitudinal axis.

Abstract: In an endoscopic fluid passage changeover valve unit, a communication passage is formed in a shaft, the communication passage being opened to a hollow portion of a cylinder portion in an inside opening located on an outer peripheral surface of the shaft, and a seal member is provided at an angular position apart from the inside opening in circumferential directions of the cylinder portion. The shaft and the seal member are rotatable relative to the cylinder portion around a movement axis toward a position where a first upstream-side fluid passage is blocked by the seal member and toward a position where the inside opening of the communication passage faces the first upstream-side fluid passage.

Abstract: An endoscope includes an elongated insertion portion inserted in a subject; a bending portion including an independently bendable first bending part and a second bending part bendable together with the first bending part in the same direction as a bending direction of the first bending part; a flexible tube portion; a first wire inserted through the insertion portion and having a distal end fixed to a distal end of the first bending part; a first guide pipe through which the first wire is inserted so as to be advanceable/retractable with respect to an insertion direction S, which has a distal end fixed between the bending portion and the flexible tube portion; a second wire inserted in the insertion portion and having a distal end fixed between the first and second bending parts, which causes the second bending part to be rigid when pulled; and a second guide pipe.

Abstract: An endoscope is provided that includes: an insertion portion; a bending portion having an independently bendable first bending region, and a second bending region that is bendable in the same direction as a bending direction of the first bending region together with the first bending region; a flexible tube portion; a first wire that, when pulled, causes only the first bending region to bend; a first guide pipe through which the first wire is inserted, and which has a distal end that is fixed to an intermediate pipe sleeve; a second wire that, when pulled, causes the second bending region to bend in conjunction with bending of the first bending region; and a second guide pipe through which the second wire is inserted, and which has one part that is fixed to a connecting pipe sleeve, and has a distal end that is positioned inside the second bending region in a condition in which the distal end protrudes forward by a first length from a distal end of the flexible tube portion in a non-fixed state.

Abstract: A treating instrument erecting device for use in an endoscope includes a treating instrument erecting member for changing the direction of projection of the distal end portion of a treating instrument inserted in a treating instrument inserting channel. The treating instrument erecting member is provided at the distal end of an insert part of the endoscope. A control wire for operating the treating instrument erecting member is axially movably inserted in a wire guide provided in the insert part to extend over the entire length of the insert part. A wire driving member for advancing or retracting the control wire is provided in a control part connected to the proximal end of the insert part. The control wire and the wire driving member are electrically isolated from each other.

Abstract: A flexible tube for an endoscope is provided with a spirally-wound tube, a braided tube covering the spirally-wound tube, and a sheath provided on the braided tube. The sheath material is fused and coated on the braided tube to form the sheath. When the sheath material is fused and applied on the braided tube, the sheath material passes through interstices of the braided tube, at the positions facing the clearances between windings, to form a plurality of protruded portions which protruded inward with respect to the braided tube.

Abstract: A flexible tube for an endoscope is provided with an outer tube member. A synthetic resin layer is formed on an outer circumferential surface of the outer tube member. A coating layer is further formed on the outer circumferential surface of the synthetic resin layer. The outer circumferential surface of the synthetic resin layer is provided with at least one groove or protrusion.

Abstract: A treating instrument erecting device for use in an endoscope includes a treating instrument erecting member for changing the direction of projection of the distal end portion of a treating instrument inserted in a treating instrument inserting channel. The treating instrument erecting member is provided at the distal end of an insert part of the endoscope. A control wire for operating the treating instrument erecting member is axially movably inserted in a wire guide provided in the insert part to extend over the entire length of the insert part. A wire driving member for advancing or retracting the control wire is provided in a control part connected to the proximal end of the insert part. The control wire and the wire driving member are electrically isolated from each other.

Abstract: A flexible tube for an endoscope is provided with a tubular sheath. An outer circumferential surface of the sheath is provided with an indicator that indicates at least one of an orientation of the sheath about an axis thereof and axial length information. The indicator includes at least one striation extending in the axial direction of the sheath. The striation is formed to be perceptible by touch.