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ENDOSCOPE, DISTAL END CAP-EQUIPPED ENDOSCOPE AND ENDOSCOPE CLEANING SHEATH

  • US 20120046524A1
  • Filed: 11/04/2011
  • Published: 02/23/2012
  • Est. Priority Date: 04/04/2008
  • Status: Active Grant
First Claim
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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 a circular 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 a to-be-washed object on the distal end surface at intervals in a circumferential direction;

    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 along an outer peripheral portion of the distal end surface to make a spatial communication between the opening ends of the liquid feed path and the opening ends of the gas feed path, the nozzle having a jet outlet which jets a gas/liquid mixture fluid, which is a mixture of the gas from the gas feed path and the liquid from the liquid feed path mixed at a confluent portion at an intermediate area of the nozzle, toward the observation window,wherein the nozzle is formed in a shape of an M to connect the opening ends of the liquid feed path with the opening ends of the gas feed path with the jet outlet centered therein, and the liquid from the opening ends of the liquid feed path and the gas from the opening ends of the gas feed path which are supplied to the jet outlet collide at an intermediate area of the nozzle at an obtuse angle of more than 90°

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