Provided is a flexible mechanism. The flexible mechanism comprises: a flexible backbone which is introduced into a treatment area in the human body and which bends along a path in the human body; and a wire for transmitting an operation force provided through a handler prepared at one end of the flexible backbone to an end-effector prepared at the other end of the flexible backbone, wherein the wire extends from the one end of the flexible backbone to the other end of the flexible backbone and can wind around the outer circumferential surface of the flexible backbone in multiples of 360 degrees or passes through a spiral path formed on an inner surface in multiples of 360 degrees.

A welded structure, in which a second tubular member is welded to an inner circumference of a first tubular member made of metal, the second tubular member being made of metal and having an outer diameter smaller than an inner diameter of the first tubular member, includes welded portions at which a portion of the first tubular member and a portion of the second tubular member are melted and solidified, a surface melted and solidified from an inner circumferential surface side of the first tubular member toward an end surface of the second tubular member forms a smoothly-continuous curved surface, and the first and the second tubular members are bonded to each other. A portion of each of the welded portions is located on an outside of a projection region obtained by projecting the second tubular member onto an outer surface of the first tubular member.

The present application provides an endoscopic device having at least one shaft, which has at least one portion deflectable in at least one plane, and having at least one deflection mechanism, which is configured to deflect the deflectable portion and includes, arranged in series, at least one first connection member and at least one second connection member interacting for a deflection with the first connection member. The first connection member is formed at least partially from a first material, and the second connection member is formed at least partially from a second material, of which the elasticity differs from that of the first material.

A multifunctional catheter includes a catheter main body (1) and a distal tube (2) that are in a multi-channel structure. The distal tube (2) includes a soft end (21) at a proximal end and a functional end (22) at a distal end; a working channel (3) and a lens channel (6) are provided in the catheter main body (1) and the soft end (21), and the functional end (22) is also provided with a through hole communicating with the lens channel (6); the lens channel (6) is of a circular tubular-cavity structure extending along the catheter main body (1) and the soft end (21); and a plurality of accommodating slots (61) are provided on an inner wall of the lens channel (6) to accommodate a photosensitive chip in a lens assembly by the plurality of accommodating slots (61).

An endoscope includes an operation portion provided on a proximal end side of an insertion portion and a treatment instrument insertion port to which a treatment instrument is inserted, and includes a forceps pipe sleeve provided in the operation portion with an axis direction of a central axis passing through the treatment instrument insertion port being different from an axis direction of the insertion portion, a flexible channel tube extending in a bent state from a proximal end of the insertion portion toward a forceps pipe sleeve and connected to the forceps pipe sleeve by insertion inside the operation portion, and a guide wall provided inside the operation portion and being contactable with an outer side portion of a bend of the channel tube by abutting on the channel tube.

An endoscope as an insertion device includes an insertion portion main body extended in a direction of a longitudinal axis and having flexibility, a motor provided in an operation portion disposed on a proximal end side of the insertion portion main body, a transmission member inserted into the insertion portion main body, extended outward the insertion portion main body along the longitudinal axis, rotated around an axis by driving force of the motor, and transmitting the rotation to a distal end side of the insertion portion main body, and a detection device detecting a position along the longitudinal axis of the insertion portion main body at a predetermined site of the transmission member.

An endoscope includes: an operating portion; an insertion tube that has a central axis; a bendable tube that is bendable in a curvature direction orthogonal to the central axis, the bendable tube including a plurality of bendable tube pieces that are arrayed along the central axis, adjacent bendable tube pieces being connected to each other by a pair of connection portions, the pair of connection portions being arranged line-symmetric with respect to the curvature direction; a distal end rigid portion that is provided on a distal end side of the bendable tube; and a wire having a first end connected to the operating portion, and a second end connected to either the bendable tube or the distal end rigid portion.

An articulating cannula assembly is described. The articulating cannula assembly includes: a hand piece; a proximal housing situated above the hand piece; a cannula distally extending from the proximal housing, the cannula including an articulating segment; and a trigger that, when actuated, extends or contracts the articulating segment. The proximal housing can removably couple to the hand piece. The proximal housing can include an endoscope attachment structure for removably securing a proximal portion of an endoscope.

A bending piece of a bending portion for endoscope is provided with: an annular wall portion; a plurality of wire inserting portions in which the wall portion has a first wall thickness; thin wall portions having a second wall thickness thinner than the first wall thickness; and a thick wall portion that is a part of the wall portion different from the thin wall portions between the plurality of wire inserting portions around a longitudinal axis, the thick wall portion formed to have a third wall thickness that is equal to or less than the first wall thickness and is thicker than the second wall thickness.

Medical devices that include a medical tool, a handle and a flexible cable bundle passing through the handle. The handles and cable routing therethrough are adapted to reduce noise within the cable.