Abstract: A bending operation device includes a bending operation lever, a wire pulling member, bending operation wires, and tubular members. The bending operation lever is tiltably supported to have an angle with respect to a longitudinal direction of an operation unit of an endoscope. The wire pulling member includes arm portions displaced in conjunction with tilt motion of the bending operation lever. The bending operation wires are connected to the arm portions. The bending operation wires cause bending motion of a bendable part disposed in an insertion section of the endoscope. A respective one of bending operation wires is inserted in each of the tubular members. The tubular members (i) change extension directions of the plurality of bending operation wires and (ii) guide the plurality of bending operation wires to the plurality of arm portions.

Abstract: An endoscope operation portion includes: an operation portion body provided being connected to a grasping portion; a joystick-type bending operation lever provided on a back side of the operation portion body, including a lever shaft body, and configured to perform a bending operation of a bending portion; and a suction button provided on a front side of the operation portion body so that an angle formed by an operation axis in a pressing-down operation direction relative to a central axis of the lever shaft body is an obtuse angle, and an intersection point between the central axis and the operation axis is positioned inside the operation portion body.

Abstract: A bending operation device includes a bending operation member, a bendable part, an operation wire, a pulling wire, and a connection member. The bending operation member is disposed in an operation unit and is supported tiltably in a preset direction. The bendable part is disposed on a side of a distal end of the operation unit. The operation wire is connected at an end thereof to the bending operation member and is pulled or relaxed according to displacement of the bending operation member. The pulling wire is connected to the bendable part and bends the bendable part. The connection member is connected to the operation wire at a first position and is connected to the pulling wire at a second position. The second position is shifted from the first position by a preset angle in a turning direction about a longitudinal axis of the operation unit.

Abstract: An endoscope operation portion includes: an operation portion body provided being connected to a grasping portion; a joystick-type bending operation lever provided on a back side of the operation portion body, including a lever shaft body, and configured to perform a bending operation of a bending portion; and a suction button provided on a front side of the operation portion body so that an angle formed by an operation axis in a pressing-down operation direction relative to a central axis of the lever shaft body is an obtuse angle, and an intersection point between the central axis and the operation axis is positioned inside the operation portion body.

Abstract: An endoscope operation portion includes: an operation portion body provided being connected to a grasping portion; a joystick-type bending operation lever provided on a back side of the operation portion body, including a lever shaft body, and configured to perform a bending operation of a bending portion; and a suction button provided on a front side of the operation portion body so that an angle formed by an operation axis in a pressing-down operation direction relative to a central axis of the lever shaft body is an obtuse angle, and an intersection point between the central axis and the operation axis is positioned inside the operation portion body.

Abstract: An electronic endoscope system including: an operation portion; an insertion portion including on a distal end side thereof a bending portion, and connected to the operation portion so as to be rotatable with respect to the operation portion, a bending direction of the bending portion changing depending on the rotation; an image pickup device disposed in the insertion portion, for generating an image of a subject; a physical quantity generation portion that generates a physical quantity which changes depending on the rotation of the insertion portion; a detection portion that detects and outputs the physical quantity generated by the physical quantity generation portion; a rotation angle calculation portion that receives the physical quantity outputted from the detection portion and calculates a rotation angle of the insertion portion; and a display portion that displays the image of the subject and information corresponding to the rotation angle of the insertion portion.

Abstract: A bending operation device includes a bending operation member, a bendable part, an operation wire, a pulling wire, and a connection member. The bending operation member is disposed in an operation unit and is supported tiltably in a preset direction. The bendable part is disposed on a side of a distal end of the operation unit. The operation wire is connected at an end thereof to the bending operation member and is pulled or relaxed according to displacement of the bending operation member. The pulling wire is connected to the bendable part and bends the bendable part. The connection member is connected to the operation wire at a first position and is connected to the pulling wire at a second position. The second position is shifted from the first position by a preset angle in a turning direction about a longitudinal axis of the operation unit.

Abstract: A bending operation device includes a bending operation lever, a wire pulling member, bending operation wires, and tubular members. The bending operation lever is tiltably supported to have an angle with respect to a longitudinal direction of an operation unit of an endoscope. The wire pulling member includes arm portions displaced in conjunction with tilt motion of the bending operation lever. The bending operation wires are connected to the arm portions. The bending operation wires cause bending motion of a bendable part disposed in an insertion section of the endoscope. A respective one of bending operation wires is inserted in each of the tubular members. The tubular members (i) change extension directions of the plurality of bending operation wires and (ii) guide the plurality of bending operation wires to the plurality of arm portions.

Abstract: An operation unit of an endoscope includes an insertion section that includes a bending portion, a plurality of operation wires configured to bend the bending portion, an operation lever that is provided on a freely tiltable operation section provided continuously to the insertion section, a wire pulling member swingably provided inside the operation section and having a plurality of arm portions, one end of the operation lever being coupled to the wire pulling member, a housing that is fixedly provided on the operation section, and that includes a through hole where the operation lever is arranged, a magnet that is provided on one of the housing and the other end portion of the operation lever, and a member on which attraction is generated by a magnetic force of the magnet, the member being provided on the other end portion of the operation lever or on the housing.

Abstract: A bending portion for endoscope includes: a distal end side bending tube in which a plurality of bending pieces are continuously and pivotably coupled; a proximal end side bending tube coupled to a proximal end side of the distal end side bending tube and including a bending element with a bending moment for obtaining a predetermined bending angle greater than a bending moment of the distal end side bending tube; and an operation wire actively bending the distal end side bending tube and the proximal end side bending tube by pulling and relaxing, wherein pulling and relaxing of the operation wire actively bend the distal end side bending tube and the proximal end side bending tube.

Abstract: A bending operation device, includes: a bending lever that is inclinably supported with respect to an operation section of an endoscope; an arm part that is provided in the bending lever and includes a distal end displaceable in conjunction with inclination operation of the bending lever; and an intermediate lever that is swingably supported with respect to the operation section, includes a force point at a middle of the intermediate lever, and includes a point of application at a position farther from a fulcrum (a shaft portion) than the force point, the force point being connected to the distal end of the arm part through an intermediate wire, and the point of application being connected to a bending wire.

Abstract: A cover member of a bending operation lever includes a center portion fixed to a shaft section of a bending operation lever of an endoscope, an intermediate portion extended in a peripheral direction from the center portion and having first hardness, and a periphery portion extended in the peripheral direction of the intermediate portion, having second hardness higher than the first hardness, and fixed to the endoscope.

Abstract: A dividing wall member is provided inside a specific bending piece selected from a plurality of bending pieces, an internal space of the bending piece is divided by the dividing wall member into a first space that opens corresponding to one rotating shaft, of rotating shafts that form a left and right pair, and a second space that is larger than the first space and opens corresponding to another rotating shaft, of the rotating shafts that form a left and right pair, and rotating shafts that form an upper and lower pair, a signal cable is inserted as a first internal component inside a first space, and a pair of light guides and a treatment instrument insertion channel are inserted as second internal components inside the second space.

Abstract: An endoscope according to the present invention includes: a bending tube including ring-like members pivotally joined via pairs of pivots facing each other relative to a center axis, the bending tube being bendable; a pair of first pull wire guides projecting inward of a ring-like member; a forceps channel disposed so as to be contactable with the pair of first pull wire guides; and a pair of second pull wire guides being provided so as to project inward of the ring-like member and being disposed so that a distance between distal end portions extending toward an inner circumferential side of the ring-like member is a distance that is smaller than an outer diameter of the forceps channel.

Abstract: A bending operation device, includes: a bending lever that is inclinably supported with respect to an operation section of an endoscope; an arm part that is provided in the bending lever and includes a distal end displaceable in conjunction with inclination operation of the bending lever; and an intermediate lever that is swingably supported with respect to the operation section, includes a force point at a middle of the intermediate lever, and includes a point of application at a position farther from a fulcrum (a shaft portion) than the force point, the force point being connected to the distal end of the arm part through an intermediate wire, and the point of application being connected to a bending wire.

Abstract: An endoscope includes a bending portion provided on a distal end side of an insertion portion, bending wires fixed on a distal end side of the bending portion, wire insertion portions into which the bending wires are inserted in the bending portion, and a channel tube inserted and disposed in the insertion portion and including an axial-directional through-hole into which a treatment instrument is inserted. The bending portion includes a bending portion set including a first bending piece set including a plurality of bending pieces rotatably coupled with each other; a tubular bending tube including a distal end portion rotatably coupled with a proximal end portion of the first bending piece set and capable of bending through a plurality of arrayed slits; and a second bending piece set including a plurality of bending pieces rotatably coupled with a proximal end portion of the tubular bending tube.

Abstract: An endoscope including an operation portion, an insertion portion pivotable relative to the operation portion, and a rotation knob to pivot the insertion portion about an axis of the insertion portion, includes: an insertion portion neutral position indicating portion, provided on an outer circumferential face of the rotation knob, configured to indicate a neutral position; and an indication ring, provided at the operation portion configured to include an operation portion neutral position indicating portion linearly aligned with the insertion portion neutral position indicating portion in an axis direction and indicating that the insertion portion is positioned at a neutral position, and two rotational angle indicating portions provided so as to be apart from the operation portion neutral position indicating portion in a circumferential direction, each of the two rotational angle indicating portions indicating rotation of the insertion portion.

Abstract: An endoscope operation portion includes: an operation portion body provided being connected to a grasping portion; a joystick-type bending operation lever provided on a back side of the operation portion body, including a lever shaft body, and configured to perform a bending operation of a bending portion; and a suction button provided on a front side of the operation portion body so that an angle formed by an operation axis in a pressing-down operation direction relative to a central axis of the lever shaft body is an obtuse angle, and an intersection point between the central axis and the operation axis is positioned inside the operation portion body.

Abstract: A bending portion for endoscope includes: a distal end side bending tube in which a plurality of bending pieces are continuously and pivotably coupled; a proximal end side bending tube coupled to a proximal end side of the distal end side bending tube and including a bending element with a bending moment for obtaining a predetermined bending angle greater than a bending moment of the distal end side bending tube; and an operation wire actively bending the distal end side bending tube and the proximal end side bending tube by pulling and relaxing, wherein pulling and relaxing of the operation wire actively bend the distal end side bending tube and the proximal end side bending tube.