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US 9,173,555 B2Granted
Endoscope
AssigneeFUJIFILM Corporation
InventorsToshiyuki Ikeda, Kan Naito
Life of this patent
Estimating the term…
Abstract
Provided is an endoscope which is capable of letting a liquid drain off to a satisfactory level at the time of cleaning, while securing the degree of freedom of a layout. An observation window is placed on an observation window base part which is formed on a distal end surface of a distal end part so as to protrude from the surrounding area. An outer peripheral shape of the observation window base part is formed into a streamline shape with respect to a flow of a cleaning fluid jetted from a nozzle. With this feature, it is possible to block a liquid flow having a low flow rate from flowing on the observation window, and to allow the liquid flow which has been used for cleaning to promptly move to the outside of the observation window.
Claims27
An endoscope comprising:
- a distal end part having a flat end surface and a round-chamfered outer peripheral edge;
- an observation window base part formed on the flat end surface of the distal end part so as to protrude distally from the flat end surface;
- an observation window placed on the observation window base part;
- and
- a nozzle which jets a cleaning fluid toward the observation window, wherein:
- the observation window base part has an outer peripheral shape formed into a streamline shape with respect to a flow of the cleaning fluid jetted from the nozzle,
- the observation window base part is located on the distal end part such that a periphery portion of the observation window base part extends up to the outer peripheral edge of the distal end part along the flow of the cleaning fluid jetted from the nozzle, and
- the outer peripheral shape of the observation window base part decreases linearly in width from the observation window to the outer peripheral edge of the distal end part in a direction of flow of the cleaning fluid.
5 more elements
An endoscope comprising:
- a distal end part having a flat end surface and a round-chamfered outer peripheral edge;
- an observation window base part formed on the flat end surface of the distal end part so as to protrude distally from the flat end surface;
- an observation window placed on the observation window base part;
- and
- a nozzle which jets a cleaning fluid toward the observation window, wherein:
- the observation window base part formed so as to extend up to the outer peripheral edge of the distal end part along a flow of the cleaning fluid jetted from the nozzle, and
- an outer peripheral shape of the observation window base part decreases linearly in width from the observation window to the outer peripheral edge of the distal end part in a direction of flow of the cleaning fluid.
4 more elements
An endoscope comprising:
- a distal end part having a flat end surface and a round-chamfered outer peripheral edge;
- an observation window base part formed on the flat end surface of the distal end part so as to protrude distally from the flat end surface;
- an observation window placed on the observation window base part;
- and
- a nozzle which jets a cleaning fluid toward the observation window, wherein:
- the observation window base part is formed so as to extend up to the outer peripheral edge of the distal end part along a straight line which connects the nozzle with the observation window, and
- an outer peripheral shape of the observation window base part decreases linearly in width from the observation window to the outer peripheral edge of the distal end part in a direction of flow of the cleaning fluid.
4 more elements
An endoscope comprising:
- a distal end part having a flat end surface and a round-chamfered outer peripheral edge;
- an observation window base part formed on the flat end surface of the distal end part so as to protrude distally from the flat end surface;
- an observation window placed on the observation window base part;
- and a nozzle which jets a cleaning fluid toward the observation window, wherein:
- the observation window base part on has an outer peripheral shape formed into a streamline shape with respect to a flow of the cleaning fluid jetted from the nozzle,
- the observation window base part is located on the distal end part such that a periphery portion of the observation window base part extends up to the outer peripheral edge of the distal end part along the flow of the cleaning fluid jetted from the nozzle,
- the outer peripheral shape of the observation window base part is formed so as to converge on a convergence point at the outer peripheral edge of the distal end part to decrease monotonically in width from the observation window to the convergence point at the outer peripheral edge of the distal end part in a direction of flow of the cleaning fluid,
- the outer peripheral shape of the observation window base part at the convergence point is sharper than the outer peripheral shape of the observation window base part around the convergence point, and
- wherein the convergence point is aligned with a central axis of the nozzle and a central axis of the observation window.
6 more elements
An endoscope comprising:
- a distal end part having a flat end surface and a round-chamfered outer peripheral edge;
- an observation window base part formed on the flat end surface of the distal end part so as to protrude distally from the flat end surface;
- an observation window placed on the observation window base part;
- and
- a nozzle which jets a cleaning fluid toward the observation window, wherein:
- the observation window base part is formed so as to extend up to the outer peripheral edge of the distal end part along a flow of the cleaning fluid jetted from the nozzle,
- an outer peripheral shape of the observation window base part is formed so as to converge on a convergence point at the outer peripheral edge of the distal end part to decrease monotonically in width from the observation window to the convergence point at the outer peripheral edge of the distal end part in a direction of flow of the cleaning fluid,
- the outer peripheral shape of the observation window base part at the convergence point is sharper than the outer peripheral shape of the observation window base part around the convergence point, and
- wherein the convergence point is aligned with a central axis of the nozzle and a central axis of the observation window.
6 more elements
An endoscope comprising:
- a distal end part having a flat end surface and a round-chamfered outer peripheral edge;
- an observation window base part formed on the flat end surface of the distal end part so as to protrude distally from the flat end surface;
- an observation window placed on the observation window base part;
- and
- a nozzle which jets a cleaning fluid toward the observation window, wherein:
- the observation window base part is formed so as to extend up to the outer peripheral edge of the distal end part along a straight line which connects the nozzle with the observation window,
- an outer peripheral shape of the observation window base part is formed so as to converge on a convergence point at the outer peripheral edge of the distal end part to decrease monotonically in width from the observation window to the convergence point at the outer peripheral edge of the distal part in a direction of flow of the cleaning fluid,
- the outer peripheral shape of the observation window base part at the convergence point is sharper than the outer peripheral shape of the observation window base part around the convergence point, and
- wherein the convergence point is aligned with a central axis of the nozzle and a central axis of the observation window.
6 more elements
Dependencies are inferred from the claim text.