Fujifilm Corporation

Other

Fujinon Corporation

Miyawaki, Tetsumaru

Shozo Iyama

Yasuhiko Morimoto

Toshizumi Tanaka

Takashi Harada

Yoshihiro Ueda

Nobuyuki Torisawa

Nobuharu Takahashi

Tomohiro Ohki

Yasunori Ohta

Kenji Yamane

Hiroaki Yasuda

Haruo Akiba

Takao Ozaki

Tsuneo Fukuzawa

Hirofumi Katsura

Toshiyuki Ikeda

Yasuyuki Hosono

Koji Itoh

Yuichi Torii

Toshihiko Izaki

Shinya Abe

Mamoru Machiya

Hidefumi Akahane

Hiroyuki Oishi

Atsushi Kanaki

Tetsumaru Miyawaki

Tatsuya Minagawa

Satoru Ogami

Masayuki Oyatsu

Haruhiko Arai

Tomoharu Nishino

Masahiro Seki

Yoshihiro Obata

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. An endoscope includes: a distal end portion body that is provided on a distal end side of an insertion section and that has a distal end, a proximal end, and a longitudinal axis; a treatment tool lead-out port that is formed in the distal end portion body and that leads out a treatment tool inserted through an inside of the insertion section; an elevator support member that is provided in the distal end portion body, that is made of a metal, and that rotatably supports an elevator that controls a lead-out direction in which the treatment tool is led out from the treatment tool lead-out port; a light guide that is inserted through the inside of the insertion section and that emits illumination light through an illumination window formed in the distal end portion body; and a light guide holding portion that is provided in the elevator support member and that holds a light guide distal end portion of the light guide on the illumination window side.

Endoscope having elevator support member in distal end portion body for heat dissipation

An endoscope aidto be attachably and detachably attached to a treatment tool insertion channelof an endoscopeincludes a tubular membercapable of being fixed to an outlet portionin a state where the tubular memberis fitted inside the outlet portionof the treatment tool insertion channelthat is kept in the shape of a straight pipe regardless of bending of a bending partof the endoscope. When the tubular memberis fixed to the outlet portion, a proximal endA of the tubular memberlocated on a side opposite to an outlet side of the treatment tool insertion channelis disposed closer to the outlet side of the treatment tool insertion channelthan a proximal endA of the bending part

Endoscope aid and endoscope

An ultrasonic endoscope includes: an ultrasonic transducer having an ultrasonic vibrator; a distal end portion body 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 has an opening which opens toward one side in a direction perpendicular to the axial direction of the distal end portion body; a treatment tool lead-out port that communicates with the inside of the erecting base housing portion; an erecting base that is disposed in the inside of the erecting base housing portion and changes a lead out direction of a 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 communicates with an outside.

Ultrasonic endoscope

An endoscope is provided in which an attachment/detachment operation of the proximal end of a wire can be easily performed to/from an erecting operation mechanism and the wire can be prevented from meandering in a wire channel. An endoscope has an operation sectionprovided with an erecting operation lever, and a movable memberthat moves in association with an operation of the erecting operation lever. The movable memberis arranged to be exposed to outside of the operation section. A wirehas a distal end side coupled to an erecting base, and a proximal end side coupled to an attachment memberthat is attachable to and detachable from the movable memberby a one-touch operation. The wireis configured of a wire bodyA and a gap filling memberB.

Endoscope

An endoscope aid is attachably and detachably attached to a treatment tool insertion channel of an endoscope where a suction tube joins. The endoscope aid includes a flexible tubular member having a length equal to or larger than a length ranging from at least an inlet-side end part of an outlet portion of the treatment tool insertion channel, which is maintained in the shape of a straight pipe regardless of bending of a bending part of the endoscope, to an inlet of the treatment tool insertion channel. The tubular member has a distal end part that has an outer periphery in sliding contact with an inner peripheral surface of the outlet portion of the treatment tool insertion channel and is disposed at the outlet portion, and a communication part that allows an outlet of the treatment tool insertion channel and the suction tube to communicate with each other.

Endoscope aid and endoscope capable of changing internal diameter of treatment tool insertion channel

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.

Ultrasonic endoscope including treatment-tool erecting base for erecting treatment tool that is led out from opening formed in distal end rigid portion of endoscope insertion section

An ultrasonic endoscope includes: an ultrasonic transducer having an ultrasonic vibrator; a distal end portion body 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 has an opening which opens toward one side in a direction perpendicular to the axial direction of the distal end portion body; a treatment tool lead-out port that communicates with the inside of the erecting base housing portion, an erecting base that is disposed in the inside of the erecting base housing portion and changes a lead out direction of a 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 communicates with an outside.

An endoscope in which an erecting operation mechanism is provided at an operation section and that can prevent an increase in size of a holding part of the operation section is provided. An endoscope according to the present invention includes an operation sectionhaving an operation section main body, a holding partconnected to the operation section main body, and an extension partextending from the holding parttoward a distal end side; an insertion sectionprovided on a distal end side of the extension part; an erecting baseprovided at a distal end partof the insertion section; a movable memberthat is provided at the extension partand that moves in association with an operation of an erecting operation lever; a wirethat is coupled to the erecting baseat a distal end side thereof, that is coupled to the movable memberat a proximal end side thereof, and that is pushed/pulled by the movable member; and an attachment memberthat is provided at a proximal end of the wireand that is engaged with the movable memberin an attachable/detachable manner by a one-touch operation.

An endoscope includes an insertion part that includes a distal end and a proximal end, a distal-end-portion body that is provided on a distal end side of the insertion part, and an ultrasound transducer that is provided on a distal end side of the distal-end-portion body. The distal-end-portion body includes a pair of walls, a standing base that is disposed in a space formed by the pair of walls and connected to a treatment tool outlet, an observation window that is disposed on one wall of the pair of walls, and a nozzle that is provided on the flat surface opposite to the space across the observation window and ejects washing water to the observation window. The wall surface of the other wall of the pair of walls is positioned on an extension of an ejection direction of the washing water to be ejected from the nozzle.

According to an aspect of the invention, the circumferential position of a protrusion portion of a light guide member is aligned with the position of a second groove portion of a pressing member and a tip portion of the light guide member is inserted into an insertion hole. Next, the light guide member is rotated to align the circumferential position of the protrusion portion of the light guide member with the position of a first groove portion of a mounting hole, and the tip portion of the light guide member is mounted in the mounting hole of a tip portion body. After that, a screw member is inserted into a through hole of the pressing member, is threadedly inserted into a screw hole of the tip portion body, and fixes the pressing member to a base end face of the tip portion body.

Endoscope and method of assembling endoscope

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.

An endoscope includes a standing base in a tip portion body, an operation wire of which a tip side is connected to the standing base, and a stretchable coating member that covers the operation wire along an extending direction of the operation wire and so as to allow the operation wire to be relatively movable over the entire region from a connection portion between the standing base and the operation wire to an operation wire-guide passage. A tip of the coating member and the standing base are liquid-tightly fixed to each other, and a base end of the coating member and the operation wire-guide passage are liquid-tightly fixed to each other, and the coating member is disposed at a position where a moving path of the coating member and a moving path of a treatment tool led from a treatment tool-guide passage do not interfere with each other.

Endoscope having operation wire with stretchable coating member

An endoscope includes: a tip portion main body provided at a tip portion of an insertion section; a camera unit attachment hole provided so as to penetrate the tip portion main body; a camera unit of which tip portion is fitted into a tip portion of the camera unit attachment hole; a locking member disposed at an outer peripheral surface of the camera unit so as to be movable in a direction that is orthogonal to the axial direction; a projection provided on either one of the locking member and the camera unit; a sliding portion provided on the other one of the locking member and the camera unit; and a locking biasing member configured to bias the locking member in the direction t orthogonal to the axial direction within the camera unit attachment hole and to push the locking member against the camera unit attachment hole.

A flexible tube for an endoscope includes a flexible tube base, an outer coating layer including a soft resin layer and a hard resin layer, a ratio changing portion, and a tapered portion. In the ratio changing portion, a percentage of a thickness of the hard resin layer decreases and a percentage of a thickness of the soft resin layer increases toward a distal side from a proximal side of the base. In the tapered portion, a ratio between the thickness of the hard resin layer and the thickness of the soft resin layer is maintained, which ratio is the same as that at a position in the ratio changing portion where the percentage of the thickness of the hard resin layer is a lower limit. In the tapered position, an outer diameter of the outer coating layer decreases toward a distal end of the flexible tube base.

Growing community of inventors

Kanagawa, Japan

Shozo Iyama