Abstract: Provided is an endoscope that can fix a guidewire and stably hold a treatment tool. The endoscope includes a distal end body (36) having an elevator housing (62) that opens toward a first direction, a treatment tool lead-out port (80) that opens inside of the elevator housing (62), and an elevator (60) that is provided inside of the elevator housing (62) so as to be rotatable between an elevated position and a lowered position, the elevator (60) having a treatment tool guiding surface (60a). A facing wall portion (66), which is on a proximal end side and an opening part of the elevator housing (62), has a concave surface (96) that is formed on an inner side of the elevator housing (62) and a convex surface (94) that is formed at a position closer than the concave surface (96) to an opening.

Abstract: An ultrasonic endoscope includes a plurality of ultrasonic vibrators; a distal end part that houses the plurality of ultrasonic vibrators; an electrically conductive endoscopic structure housed in or connected to the distal end part; a thermally conductive member connected to the plurality of ultrasonic vibrators; and an electrically insulating thermally conductive member connected to the endoscopic structure. The thermally conductive member and the electrically insulating thermally conductive member are connected to each other. Thus, the ultrasonic endoscope that has a heat release structure which transmits the heat generated from the ultrasonic vibrators to the electrically conductive endoscopic structure housed in the distal end part and which can efficiently release the heat therefrom while electric safety is secured; and that can prevent a burn of an alimentary canal by suppressing a temperature rise of surfaces of the ultrasonic vibrators is provided.

Abstract: An ultrasonic endoscope has an ultrasonic transducer array in which a plurality of ultrasonic transducers are arranged; a backing material layer on a back side of a plurality of ultrasonic transducers, a wiring board including a plurality of electrode pads that are connected to the plurality of ultrasonic transducers; a plurality of shield cables each including a signal wire and a shield member, a wiring portion in which the plurality of signal wires are electrically connected to the plurality of electrode pads; a ground portion that is electrically connected to the shield members and that have heat conductivity; and a first heat conductive member that extends beyond the backing material layer to a side opposite to the ultrasonic transducer array with respect to the backing material layer and that is thermally connected to the ground portion.

Abstract: An ultrasonic endoscope has a laminated body that includes an ultrasonic transducer array in which a plurality of ultrasonic transducers are arranged, and a backing material layer that supports the plurality of ultrasonic transducers; a cable portion that includes a plurality of cables each of which is electrically connected to a corresponding one of the plurality of ultrasonic transducers, and a shield member that covers the plurality of cables from outside and that is made of a metal; and a first heat conductive member that is disposed on a side surface of the laminated body. The first heat conductive member is extended to the shield member that is grounded to a housing and is thermally connected to the shield member.

Abstract: An ultrasonic endoscope has an ultrasonic vibrator array in which a plurality of ultrasonic vibrators are arrayed; a backing material layer that supports the ultrasonic vibrators; shield cables that each include a signal wire and a shield member for the signal wire; a flexible printed wiring board that extends on a side opposite to the ultrasonic vibrator array with respect to the backing material layer and that includes a ground portion electrically connected to the shield members; and a heat conductive layer that is provided on at least one surface of the flexible printed wiring board and connected to the ground portion, the heat conductive layer dissipating heat generated in the plurality of ultrasonic vibrators to the ground portion.

Abstract: Provided is an endoscope that can suppress increase in the temperature of a distal end portion of an insertion section while preventing increase in the number of components and increase in the diameter of the distal end portion.

Abstract: Provided is an endoscope that can appropriately illuminate an insertion direction side of an insertion part, a treatment tool and a treatment target region thereof and can reduce the diameter of a distal end part of the insertion part.

Abstract: Provided is an endoscope capable of reliably illuminating a treatment tool delivered from a treatment tool delivery port and a treatment target region thereof. An endoscope includes a distal end part body that is provided on a distal end side of an insertion part and has a distal end, a proximal end, and a longitudinal axis; the treatment tool delivery port that is formed in the distal end part body and delivers the treatment tool inserted into the insertion part; an elevator that is rotatably supported in the treatment tool delivery port of the distal end part body and controls a delivery direction of the treatment tool delivered from the treatment tool delivery port; and a first illumination window that is provided on the distal end part body. The first illumination window is provided in a proximal end side region at a position shifted from the treatment tool delivery port to a proximal end side of the distal end part body in the distal end part body.

Abstract: An endoscope includes an insertion part that includes a distal end and a proximal end, and a distal-end-portion body that is provided on a distal end side of the insertion part and formed with a treatment tool outlet from which a treatment tool is led out. The distal-end-portion body includes an observation window, a nozzle that ejects washing water to the observation window, a standing base that is disposed in a standing base-housing portion adjacent to the treatment tool outlet and is rotationally moved between a standing position and a falling position, and a guide wall that is disposed at a position facing the nozzle with the observation window interposed therebetween and guides the washing water to the standing base-housing portion. Washing water, which has been ejected from the nozzle and has passed the observation window, is guided to the standing base-housing portion by the guide wall.

Abstract: There is provided an ultrasound endoscope of which a distal-end-part body of an insertion unit can be reduced in size. In an ultrasound endoscope according to an embodiment of the invention, a straight pipe portion of a first three-way pipe and a straight pipe portion of a second three-way pipe are arranged adjacent to each other in a direction orthogonal to the direction of a longitudinal axis of an insertion unit, and a branch pipe portion and the straight pipe portion are arranged at positions overlapping with each other in a case where the first three-way pipe and the second three-way pipe are projected onto a plane perpendicular to the direction of the longitudinal axis.

Abstract: There is provided an ultrasonic endoscope, in which bending of a signal cable at a time of assembling a distal end portion is alleviated and the signal cable is prevented from being disconnected, and a manufacturing method thereof.

Abstract: There is provided is an endoscope that can improve the cleanliness of a peripheral portion of an elevator. An endoscope (1) includes an insertion part (12) that is provided with a treatment tool insertion channel (82), a distal end portion main body (36), an elevator housing portion (62) that is provided in the distal end portion main body (36) and is open in a first direction, a treatment tool outlet (80) that is open to an inside of the elevator housing portion (62) and communicates with the treatment tool insertion channel (82), and an elevator (60). The elevator (60) has a first surface (64) and a second surface (66) inside a facing region facing the treatment tool outlet (80) in a state where the elevator is positioned at an elevated position.

Abstract: The present invention provides an ultrasonic endoscope in which wiring can be reliably fixed to a wire housing space of an ultrasonic-oscillator housing part, and a method of manufacturing the ultrasonic endoscope. According to the present invention, a wire housing space is encapsulated from the outside by sealing a gap formed between an ultrasonic oscillator and an ultrasonic-oscillator housing part with sealing members. With this configuration, the wire housing space can be sufficiently filled with filling agent for fixing wires in the wire housing space. This achieves an ultrasonic endoscope in which the wires can be reliably fixed to the wire housing space of the ultrasonic-oscillator housing part.

Abstract: An elevator provided in a treatment tool leading section of a leading end section of the endoscope includes a wide body portion that is provided on a distal end side with respect to a rotation shaft, and has a width more than that of a narrow body portion provided on a proximal end side. The wide body portion projects through an opening in an upper portion in an elevator accommodation groove in a state where the elevator rises most. The wide body portion prevents the treatment tool from dropping into a gap in a side when the elevator is lying. Meanwhile, when the elevator is cleaned with a cleaning brush, raising the elevator enables side faces of the elevator to be easily cleaned.

Abstract: There is provided an endoscope capable of suppressing the degradation of a distal-end-part body over time that is caused by the sandwiching of a treatment tool. An endoscope includes a distal-end-part body that is provided at a distal end of an insertion unit. The distal-end-part body includes an elevator-housing space-forming wall that forms an elevator-housing space opened in a direction perpendicular to the direction of the longitudinal axis of the insertion unit, a lead-out portion that includes a treatment tool outlet opened into the elevator-housing space, and an elevator that is provided in the elevator-housing space so as to be rotatable about a rotating shaft between a standing position and a fallen position and includes a guide surface guiding a treatment tool. The elevator-housing space-forming wall includes an opening wall portion provided on an opening side of the elevator-housing space.

Abstract: An elevator assembly to be accommodated in the leading end section of the endoscope includes an assembly body, an elevator, and an elevation lever. The elevator includes an elevator rotation shaft portion, the elevation lever includes a lever rotation shaft portion, and the assembly body includes a bearing hole for supporting the rotation shaft portions and. The elevator rotation shaft portion is inserted into the bearing hole from a recessed portion of the assembly body, and the lever rotation shaft portion is inserted into the bearing hole from a side opposite to the recessed portion, and then the shaft portions are coupled to each other.

Abstract: The present invention provides an ultrasonic endoscope in which the position of an ultrasonic oscillator can be easily adjusted with respect to a surgical-tool guide opening provided to a leading end part body of an insertion unit, and a method of manufacturing the ultrasonic endoscope. According to the present invention, an ultrasonic oscillator can be positioned with respect to and temporarily fixed to an ultrasonic-oscillator housing part by using spacers and or protrusions. With this configuration, in an ultrasonic endoscope according to the present invention, the position of the ultrasonic oscillator can be adjusted with respect to the ultrasonic-oscillator housing part by using the spacers or the protrusions. Accordingly, the position of the ultrasonic oscillator can be adjusted with respect to a surgical-tool guide opening provided to a distal end part body of an insertion unit.

Abstract: A ultrasonic oscillator unit including an ultrasonic oscillator array in which a plurality of oscillators are arranged in a circular-arc shape; an electrode part that is provided on at least one end surface of the plurality of oscillators perpendicular to a longitudinal direction thereof and that is electrically connected with the oscillators; a backing material layer that is disposed on a rear surface of the ultrasonic oscillator array; and a cable wiring part including a flexible printed wired board. The flexible printed wired board includes a cable connecting part that extends to a lower side of the backing material layer, is separated into a plurality of belt-like pieces, and has, in a comb shape, a plurality of strip-like electrode parts in which at least one electrode pad is linearly disposed in the longitudinal direction of each of the belt-like pieces.

Abstract: An ultrasonic endoscope includes a distal end rigid portion that is located at a distal end of an insertion section; a treatment tool lead-out portion that is disposed on a proximal end side of an ultrasonic transducer and that includes an erecting base housing portion that has an opening whose opening direction is toward one side in a first direction, an opening forming surface in which the opening is formed, and a treatment-tool erecting base that is disposed in an inside of the erecting base housing portion and that changes a lead-out direction of a treatment tool; and an observation window that is disposed in an observation means forming surface located on the proximal end side of the opening forming surface. The position of the observation window in the first direction is located on one side in the first direction relative to a one-side opening position of the opening.

Abstract: An ultrasonic endoscope includes an ultrasonic transducer that has an ultrasonic vibrator, a distal end portion body that is disposed continuously with a proximal end side of the ultrasonic transducer, an erecting base housing portion that is disposed in the distal end portion body and that has an opening whose opening direction is toward one side in a first direction that is perpendicular to the axial direction of the distal end portion body, a treatment tool lead-out port that communicates with an inside of the erecting base housing portion and from which a treatment tool is led out, an erecting base that is disposed in the inside of the erecting base housing portion and that changes a lead out direction of the treatment tool led out from the treatment tool lead-out port, and a cleaning communication hole that is formed in a wall surface on a side opposite to a side where the opening of the erecting base housing portion is disposed and that communicates with an outside.