Endoscope, distal end cap-equipped endoscope and endoscope cleaning sheath
First Claim
1. An endoscope comprising:
- an insertion section which is inserted in a body cavity;
a distal end section body which constitutes a distal end section of the insertion section and has at least an observation window at a distal end surface;
a liquid feed path which communicates with a liquid feed source to supply liquid and has a plurality of opening ends open to the outer peripheral side of the distal end surface at intervals;
a gas feed path which communicates with a gas feed source to supply gas and has a plurality of opening ends open on the distal end surface opposite to the opening ends of the liquid feed path across the observation window; and
a nozzle which forms an M-shaped path formed of a first V-shaped path extending from an opening end of the liquid feed path along an outer peripheral portion and bending toward the center of the distal end section, a second V-shaped path extending from an opening end of the gas feed path along the outer peripheral portion and bending toward the center of the distal end section, and a confluent portion at which an extended end of the first path and an extended end of the second path are connected with each other at an obtuse angle more than 90° and
the gas and the fluid from each of the opening ends collide and mix with each other to be a gas/liquid mixture fluid, the nozzle comprising a jet outlet to let the gas/liquid mixture fluid toward the observation window.
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Accused Products
Abstract
An endoscope includes, an insertion section, a distal end section body has an observation window, a liquid feed path which is formed to supply a liquid to the distal end section body side, a gas feed path which is formed to supply a gas to the distal end section body side, and a nozzle having a confluent portion which makes confluent the liquid supplied from the liquid feed path and the gas supplied from the gas feed path, and a jet outlet which jets a gas/liquid mixture fluid, which is mixed in the confluent portion, toward the observation window, wherein the nozzle is configured such that an angle, which is formed between a direction of a flow of the liquid toward the jet outlet and a direction of a flow of the gas toward the jet outlet, is set at an obtuse angle of 90° or more.
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Citations
15 Claims
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1. An endoscope comprising:
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an insertion section which is inserted in a body cavity; a distal end section body which constitutes a distal end section of the insertion section and has at least an observation window at a distal end surface; a liquid feed path which communicates with a liquid feed source to supply liquid and has a plurality of opening ends open to the outer peripheral side of the distal end surface at intervals; a gas feed path which communicates with a gas feed source to supply gas and has a plurality of opening ends open on the distal end surface opposite to the opening ends of the liquid feed path across the observation window; and a nozzle which forms an M-shaped path formed of a first V-shaped path extending from an opening end of the liquid feed path along an outer peripheral portion and bending toward the center of the distal end section, a second V-shaped path extending from an opening end of the gas feed path along the outer peripheral portion and bending toward the center of the distal end section, and a confluent portion at which an extended end of the first path and an extended end of the second path are connected with each other at an obtuse angle more than 90° and
the gas and the fluid from each of the opening ends collide and mix with each other to be a gas/liquid mixture fluid, the nozzle comprising a jet outlet to let the gas/liquid mixture fluid toward the observation window. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification