Endoscope, distal end structural member provided at distal end portion of endoscope, and method for manufacturing distal end structural member provided at distal end portion of endoscope

An endoscope, comprising:

• an insertion section extending along a longitudinal axis, and including a distal end portion;
• wherein the distal end portion includes:
• an observation window, and
• a distal end structural member, including a conduit integrally formed as a through hole with the distal end structural member, the conduit configured so that a fluid flows through the conduit, the conduit including:
• a nozzle, and
• a supply conduit located proximally relative to the nozzle,
• wherein a cross-sectional area of the supply conduit is greater than a cross-sectional area of the nozzle,
• wherein the observation window is provided distally relative to the nozzle,
• wherein the distal end structural member further includes a surface connecting the conduit and the observation window,
• wherein the surface is provided between the observation window and a distal opening of the nozzle in a longitudinal direction of the distal end structural member,
• wherein a center axis of the conduit intersects a surface of the observation window,
• wherein the surface is sloped in a direction of the center axis of the conduit,
• wherein the distal end portion further includes a raising base displaceable in a direction intersecting the longitudinal axis of the insertion section,
• wherein the distal end structural member further includes a housing chamber being in communication with an environment outside of the distal end structural member, and
• wherein the raising base is located in the housing chamber.