Insertion apparatus and operation section of insertion apparatus

An endoscope comprising:

• a frame having a common conduit;
• a tube inserted in the common conduit;
• and
• a seal for sealing a first passage from a second passage;
• the first passage comprising:
• a first tube conduit formed in the tube to extend longitudinally from a distal end side to a proximal end side of the tube;
• a first communication hole formed on an outer circumferential surface of the tube at a first position inside the common conduit, the first communication hole being in fluid communication with the first tube conduit;
• and
• a first frame conduit formed in the frame, the first frame conduit being in fluid communication with the first communication hole and the first tube conduit;
• the second passage comprising:
• a second tube conduit, different from the first tube conduit, formed in the tube, the second tube conduit extending longitudinally from the distal end side to the proximal end side of the tube;
• a second communication hole formed on an outer circumferential surface of the tube at a second position inside the common conduit, the first and second positions being longitudinally offset from each other, the second communication hole being in fluid communication with the second tube conduit;
• and
• a second frame conduit formed in the frame, the second frame conduit being in fluid communication with the second communication hole and the second tube conduit.

An endoscope comprising:

• an insertion section having a tube comprising:
• a first tube conduit extending longitudinally from a distal end side to a proximal end side of the tube;
• a second tube conduit extending longitudinally from the distal end side to the proximal end side of the tube;
• a first tube communication hole formed on an outer surface of the tube, the first tube communication hole allowing the first tube conduit to fluidly communicate with an outside of the tube;
• and
• a second tube communication hole formed on the outer surface of the tube offset longitudinally from the first communication hole, the second communication hole communicating with the second tube conduit,
• a frame comprising:
• a first frame conduit into which the tube is inserted;
• and
• a second frame conduit which allows the first tube conduit to fluidly communicate with an outside of the frame;
• and
• a third frame conduit which allows the second tube conduit to fluidly communicate with the outside of the frame;
• and
• a spacer mounted on the outer surface of a proximal end side of the tube, the spacer being positioned in the first frame conduit such that the first tube communication hole and the second frame conduit fluidly communicate with each other and the second tube communication hole and the third frame conduit fluidly communicate with each other;
• wherein
• a first seal and a second seal are disposed to sealingly contact with the tube and with the first frame conduit,
• the spacer is disposed between the first seal and the second seal, and
• the second frame conduit has an opening at a longitudinal position of the first frame conduit between the first seal and the second seal.