Asahi Kogaku Kogyo Kabushiki Kaisha

Hodogaya Chemical Co., Ltd.

Shinichi Matsuno

Norimasa Yokoyama

Keiji Ito

Hiroyuki Katsurada

Takeo Motegi

Kaoru Kasahara

Hiroyuki Iguchi

In a front end structure of a side-view type endoscope in which a treatment tool raising piece is swingably held in a raising piece receiving groove formed in the front end body, a bridge is provided on the front end surface of the front end body and extends to bridge a front opening of the raising piece receiving groove.

Front end structure of side-view type endoscope

A front end structure of a side-view type endoscope includes a metal front end body on the side face of which a view window is provided, and an end cap of a resilient material in the form of a cylinder with a closed bottom. The end cap is detachably attached to the front end body and is provided with an opening through which at least the view window is exposed. Detachment preventing engagement portions are provided between the end cap and the front end body on opposite sides of the view window. The detachment preventing engagement portions are each provided with at least one recess and at least one projection which is engaged in the recess to resist the movement of the end cap in the end cap detachment direction.

An endoscope includes an endoscope having an elongated insertion portion, a front end body provided on the front end of the elongated insertion portion, and a detachable front end cover which covers said front end body, wherein said front end cover is comprised of a combination of an easily deformable member having a high resiliency and a deformation restricting member having a lower resiliency than the easily deformable member.

Endoscope

A side view type endoscope includes a front end body having a view window on the side surface thereof, a detachable front end cover which covers the front end body, an opening provided on the side surface of the front end cover, through which the view window is exposed to the exterior, air and/or water supply passages which supply cleaning air and/or water, and a nozzle connected to the air and/or water supply passages to selectively inject air or water toward the view window, wherein the air and/or water supply passages are provided on said front end body and the nozzle is provided on the front end cover.

Side view endoscope

An end structure of an endoscope includes a front end body of a cylindrical insertion portion to be inserted in a human body, a fluid discharge opening which opens into the front end body, a front end cap detachably attached to the front end body and having a fluid injection nozzle connected to the fluid discharge opening. A projection is provided on the end cap, is fitted in the fluid discharge port, and constitutes at least a part of the fluid injection nozzle.

End structure of endoscope

An endoscope having a tool guide member which is pivotable in the longitudinal direction of an insert part of the endoscope by remote control to change the direction of projection of a tool for an endoscopic procedure, which is projected outwardly from the distal end of the insert part. A pair of inner and outer walls are formed on the distal end of the insert part so as to be in contact with both side surfaces of the tool guide member. A control wire is driven to move back and forth by remote control to pivot the tool guide member. The distal end of the control wire is disposed at the outside of the outer wall. A driving force transmitting member is disposed to extend through a bore formed in the outer wall so as to transmit the motion of the control wire to the tool guide member.

A distal end part of an endoscope including an objective optical system which is disposed in the distal end portion of an insert part of the endoscope so that the optical axis of the objective optical system perpendicularly intersects the longitudinal axis of the distal end portion of the insert part. The distal end part further includes a planar image sensor which is incorporated in the distal end portion, so that it can be inserted and removed along the longitudinal axis of the distal end portion. The planar image sensor is secured in opposed relation to the objective optical system to convert an image of an object, which is formed by the objective optical system, into an electric signal.

Distal end part of endoscope

A benzamide derivative of the formula: ##STR1## wherein R.sub.1 is hydrogen or methyl, and R is hydroxyl, C.sub.1 -C.sub.6 alkoxy, alkenylalkoxy, alkoxyalkoxy, amino, C.sub.1 -C.sub.4 monoalkylamino, monoalkenylamino, dialkylamino or O-cat wherein cat is a metal, ammonium or an organic cation.

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Tokyo, Japan

Shinichi Matsuno