Abstract: An endoscope includes a movable lens group that is movable forward and backward in an optical axis direction, a flexible shaft that has a shaft axis, is configured to rotate in a rotation direction about the shaft axis, and moves the movable lens group in the optical axis direction in a case in which the flexible shaft rotates in the rotation direction, a zoom operation knob, a slider that moves forward and backward in a direction of the shaft axis according to an operation of the zoom operation knob, and a power conversion transmission mechanism that rotates the flexible shaft by the forward and backward movement of the slider.

Abstract: An operation switch that is housed in a housing recess of a switch disposition surface located in an operation part main body and between a bending operation knob disposition surface and a universal cable connection surface and that is configured to swing in a longitudinal axis direction is provided, and in a case where the endoscope operation part is viewed from a side facing the switch disposition surface, a position of a top portion of the operation switch in the longitudinal axis direction is located upward of a center position of a universal cable connection portion in a state in which the operation switch is not operated.

Abstract: The connector device includes a metal internal member, a metal light guide rod and metal fixing bases and, which are connected to the internal member, a resin sheathing member that accommodates the internal member and includes leading-out holes, which lead the light guide rod and the fixing base to the outside, and fluoro rubber O-rings, which are provided on the light guide rod and the fixing bases, the O-rings being respectively placed in gaps between the light guide rod and the fixing bases and the leading-out holes and sealing the inside of the sheathing member.

Abstract: This endoscopic surgical device includes: an endoscope; a treatment tool; and a mantle tube. The inside of the mantle tube is partitioned by a partition wall member provided with an endoscope guide groove and a treatment-tool guide groove, to form an endoscope insertion passage and a treatment-tool insertion passage. An endoscope fixation tool and a treatment-tool fixation tool are respectively disposed inside the endoscope guide groove and the treatment-tool guide groove. The endoscope fixation tool advances and retracts in conjunction with the endoscope insertion part inserted through the endoscope insertion passage. The treatment-tool fixation tool moves in conjunction with the treatment-tool insertion part inserted through the treatment-tool insertion passage.

Abstract: Provided are a surgery system that can ensure insulation between an endoscope and a treatment tool. The endoscope has an insertion part that is insertable into an overtube and has a distal end, a proximal end, and a longitudinal axis, and is locked to the movable body by an endoscope holding part. The endoscope has a first insertion part that is provided on a distal end side of the insertion part, a second insertion part that is provided on a proximal end side of the first insertion part and has an external diameter larger than that of the first insertion part, and a held part that is provided from a distal end of the second insertion part toward a proximal end side thereof, is held by the endoscope holding part, and has at least a surface formed of an insulating member having an insulation property.

Abstract: A surgery system includes an overtube that has a distal end, a proximal end, and a longitudinal axis and holds a treatment tool and an endoscope so as to be movable forward and backward in a direction of the longitudinal axis. The overtube has an endoscope holding part that has an endoscope holding surface for holding the endoscope and allowing circumferential rotation of the endoscope about a central axis of the endoscope, and a treatment tool holding part that has a treatment tool holding surface for holding the treatment tool. The surgery system further includes an endoscope that is inserted into the overtube and has a held surface held by the endoscope holding surface. The endoscope has an orientation maintaining part that maintains the circumferential orientation of the endoscope even in a case where the overtube rotates around the longitudinal axis.

Abstract: Cleaning performance or wiping performance for an observation window is improved in an endoscope. In a distal end face of a distal end part of the endoscope, a guide part rising to a distal end side is provided between an observation window and a fluid injection nozzle. A width of the guide face of the guide part has a narrowed part, and a portion with the narrowest width serves as a fluid guiding part. The fluid guiding part guides fluid passing through a position of the fluid guiding part, in fluid injected from the fluid injection nozzle, to a first fluid route through which the fluid is guided to the observation window. Fluid deviated from the fluid guiding part is guided to a region adjacent to the observation window through a second fluid route.

Abstract: An endoscope connector device that can prevent infiltration of moisture into a sheathing member, which occurs due to a difference in a thermal expansion factor between the resin sheathing member and a metal extension member, is provided. The connector device includes a metal internal member 42, a metal light guide rod 12 and metal fixing bases 36A and 36B, which are connected to the internal member 42, a resin sheathing member 20 that accommodates the internal member 42 and includes leading-out holes 26C, 38A, and 38B, which lead the light guide rod 12 and the fixing base 36A, 36B to the outside, and fluoro rubber O-rings 30, 40A, and 40B, which are provided on the light guide rod 12 and the fixing bases 36A and 36B, the O-rings 30, 40A, and 40B being respectively placed in gaps between the light guide rod 12 and the fixing bases 36A and 36B and the leading-out holes 26C, 38A, and 38B and sealing the inside of the sheathing member 20.

Abstract: A distal end of an endoscope insertion passage of an overtube is provided with a fluid supply and discharge port. When an observation window of the endoscope insertion part inserted through the endoscope insertion passage is cleaned, an operator can set a distal end surface at a predetermined positioning position using a positioning mechanism, without extracting the endoscope insertion part from the endoscope insertion passage. A concave cleaning storage part that communicates with the fluid supply and discharge port is formed inside the endoscope insertion passage on the distal end side. Cleaning water is supplied from the fluid supply and discharge port to remove foreign matter from the observation window, and stored in the cleaning storage part, and then, the cleaning water stored in the cleaning storage part is suctioned from the fluid supply and discharge port.

Abstract: A syringe device includes a syringe body; a first space defined inside the syringe body; a plunger body being slidable inside the syringe body and varies the volume of the first space; a second space defined inside the plunger body; a plunger rod being slidable inside the plunger body and varies the volume of the second space; a coil spring that urges the plunger rod in a direction expanding the volume of the second space; a first communication passage and a second communication passage that communicate the first space with the second space; and a check valve member that forms an orifice that restricts the flow of a fluid between the first space and the second space in the first communication passage, and a check valve that allows only the flow of the fluid from the second space to the first space in the second communication passage.

Abstract: Provided are a surgery system that can ensure insulation between an endoscope and a treatment tool. The endoscope has an insertion part that is insertable into an overtube and has a distal end, a proximal end, and a longitudinal axis, and is locked to the movable body by an endoscope holding part. The endoscope has a first insertion part that is provided on a distal end side of the insertion part, a second insertion part that is provided on a proximal end side of the first insertion part and has an external diameter larger than that of the first insertion part, and a held part that is provided from a distal end of the second insertion part toward a proximal end side thereof, is held by the endoscope holding part, and has at least a surface formed of an insulating member having an insulation property.

Abstract: A surgery system includes an overtube that has a distal end, a proximal end, and a longitudinal axis and holds a treatment tool and an endoscope so as to be movable forward and backward in a direction of the longitudinal axis. The overtube has an endoscope holding part that has an endoscope holding surface for holding the endoscope and allowing circumferential rotation of the endoscope about a central axis of the endoscope, and a treatment tool holding part that has a treatment tool holding surface for holding the treatment tool. The surgery system further includes an endoscope that is inserted into the overtube and has a held surface held by the endoscope holding surface. The endoscope has an orientation maintaining part that maintains the circumferential orientation of the endoscope even in a case where the overtube rotates around the longitudinal axis.

Abstract: This endoscopic surgical device includes: an endoscope; a treatment tool; and a mantle tube. The inside of the mantle tube is partitioned by a partition wall member provided with an endoscope guide groove and a treatment-tool guide groove, to form an endoscope insertion passage and a treatment-tool insertion passage. An endoscope fixation tool and a treatment-tool fixation tool are respectively disposed inside the endoscope guide groove and the treatment-tool guide groove. The endoscope fixation tool advances and retracts in conjunction with the endoscope insertion part inserted through the endoscope insertion passage. The treatment-tool fixation tool moves in conjunction with the treatment-tool insertion part inserted through the treatment-tool insertion passage.

Abstract: An endoscopic surgical device that can suitably puncture a body wall with an overtube that having two insertion passages is provided. In a case where a body wall is punctured with the overtube that has two insertion passages through which medical instruments are inserted and that has openings of the insertion passages in a distal end surface, distal end parts of two needle parts of an inner needle are disposed to protrude from the openings in a case where the inner needle is mounted. Accordingly, a distal end portion of the overtube has a tapered shape, cutting blade parts are disposed in the same straight line as seen from a distal end side, and an insertion load is reduced.

Abstract: A syringe device includes a syringe body; a first space defined inside the syringe body; a plunger body being slidable inside the syringe body and varies the volume of the first space; a second space defined inside the plunger body; a plunger rod being slidable inside the plunger body and varies the volume of the second space; a coil spring that urges the plunger rod in a direction expanding the volume of the second space; a first communication passage and a second communication passage that communicate the first space with the second space; and a check valve member that forms an orifice that restricts the flow of a fluid between the first space and the second space in the first communication passage, and a check valve that allows only the flow of the fluid from the second space to the first space in the second communication passage.

Abstract: A distal end of an endoscope insertion passage of an overtube is provided with a fluid supply and discharge port. When an observation window of the endoscope insertion part inserted through the endoscope insertion passage is cleaned, an operator can set a distal end surface at a predetermined positioning position using a positioning mechanism, without extracting the endoscope insertion part from the endoscope insertion passage. A concave cleaning storage part that communicates with the fluid supply and discharge port is formed inside the endoscope insertion passage on the distal end side. Cleaning water is supplied from the fluid supply and discharge port to remove foreign matter from the observation window, and stored in the cleaning storage part, and then, the cleaning water stored in the cleaning storage part is suctioned from the fluid supply and discharge port.

Abstract: Cleaning performance or wiping performance for an observation window is improved in an endoscope. In a distal end face of a distal end part of the endoscope, a guide part rising to a distal end side is provided between an observation window and a fluid injection nozzle. A width of the guide face of the guide part has a narrowed part, and a portion with the narrowest width serves as a fluid guiding part. The fluid guiding part guides fluid passing through a position of the fluid guiding part, in fluid injected from the fluid injection nozzle, to a first fluid route through which the fluid is guided to the observation window. Fluid deviated from the fluid guiding part is guided to a region adjacent to the observation window through a second fluid route.

Abstract: A radiation detection device, which includes an imaging board for detecting radiation transmitted through a subject to obtain a radiographic image of the subject, is provided with a heat dissipating member disposed on a radiation receiving side of the imaging board.