JP5562588B2 - Endoscope - Google Patents

Endoscope Download PDF

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JP5562588B2
JP5562588B2 JP2009168078A JP2009168078A JP5562588B2 JP 5562588 B2 JP5562588 B2 JP 5562588B2 JP 2009168078 A JP2009168078 A JP 2009168078A JP 2009168078 A JP2009168078 A JP 2009168078A JP 5562588 B2 JP5562588 B2 JP 5562588B2
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air
tube
portion
insertion
end side
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JP2011022416A (en
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康夫 平田
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オリンパス株式会社
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Description

The present invention is to comprise an elongated insertion portion, the insertion portion to direct the distal end side of the insertion direction of the insertion portion in a plurality of directions, an endoscope that bendable bending portion is provided in a plurality of directions.

  Conventionally, in the industrial field, it is possible to observe, inspect, and the like, scratches, corrosion, etc. of a test site by inserting a narrow insertion portion into a test site, for example, a boiler, a turbine, an engine, or a chemical plant. Endoscopes are widely used.

  By the way, various foreign substances such as dust and oil are present in various devices or pipes serving as test sites. Therefore, when observing and inspecting pipes and equipment using industrial endoscopes, these foreign objects obstruct the observation field of the endoscope, so there are foreign objects at the site to be examined. In such a case, there is a problem that observation, inspection and the like are difficult to perform.

  Therefore, conventionally, a foreign object is obtained by inserting the treatment tool into the test site through a known channel included in the endoscope or by inserting the treatment tool into the test site separately from the endoscope. However, this operation is very complicated for the operator.

  In view of such circumstances, Patent Document 1 discloses that an external channel such as an air tube is fixed outside the insertion portion, and air is supplied from the external channel to the site to be examined. The structure which can remove the foreign material of a test site | part is disclosed.

JP 2005-131173 A

  Here, in the configuration disclosed in Patent Document 1, it is necessary to secure the diameter of the air tube to some extent in order to ensure the flow rate of air from which foreign matter can be removed.

  However, as the diameter of the air tube is increased, the bending portion provided in the insertion portion of the endoscope becomes difficult to be bent, that is, the bending performance of the bending portion is degraded. It was.

The present invention has been made in view of the above circumstances, and reliably supplies air at a flow rate capable of removing foreign matter from the test site from the nozzle to the test site without disturbing the bending of the bending portion. An object of the present invention is to provide an endoscope having a configuration that can be used.

In order to achieve the above object, an endoscope according to an aspect of the present invention includes an elongated insertion portion, and causes the insertion portion to have a distal end side in the insertion / extraction direction of the insertion portion oriented in a plurality of directions. In an endoscope provided with a bendable bending portion, a tube member that discharges gas to a test site, an optical adapter provided at a distal end portion of the insertion portion in the insertion / extraction direction, and an outer peripheral surface of the optical adapter The tube member that is provided in the first support member that supports the distal end side of the tube member in the insertion / extraction direction without interfering with the bending operation when the bending portion is bent. The tube member can be swung in its movable range so that the discharge direction of the gas discharged from the optical adapter is located within the field of view of the observation window provided in the optical adapter. A first support member provided to be swingable around an axis orthogonal to the insertion / removal direction, and an intermediate position in the insertion / removal direction of the tube member provided on an outer peripheral surface of the flexible tube portion of the insertion portion A second support member that slidably supports the bending portion when the bending portion is bent, and is provided to be swingable about an axis orthogonal to the insertion / extraction direction of the insertion portion without interfering with the bending operation. A second support member.

According to the present invention, without interfering with the bending of the bending portion, providing an endoscope having a measurement site from the nozzle, the configuration of the air flow capable of removing foreign matters該被measurement site can be reliably supplied can do.

The perspective view which shows the outline of a structure of the endoscope apparatus which comprises the endoscope of 1st Embodiment. The partial perspective view which expands and shows the operation part of the endoscope of FIG. The perspective view which shows partially the front end side of the insertion part of the endoscope of 2nd Embodiment The partial expansion perspective view which shows the connection aspect of the front end side site | part and proximal end side part of an air tube with respect to the connection member of FIG. Sectional view of the outer tube in the vicinity of the connecting member along line V-V in FIG. The perspective view which shows partially the front end side of the insertion part of the endoscope of 3rd Embodiment The perspective view which shows partially the structure of the modification of the front end side of the insertion part of an endoscope Partial sectional view taken along line VIII-VIII in FIG. The perspective view which shows the state which removed the nozzle | cap | die, the fixing knob, the air tube from the outer tube of FIG. 7, and removed the air tube from the cap with the nozzle | cap | die of the outer tube base end side. The perspective view which shows partially the modification which comprised the outer tube of FIG. 7 from the multi-lumen tube The perspective view which shows the structure different from FIGS. 7-9 which gives a slack to the site | part along the curved part of an air tube. The perspective view which shows partially the structure which changes the position of the nozzle with which the front end side of the air tube with which the insertion part and the adapter were mounted | worn with the outer peripheral surface is mounted | worn The perspective view which shows partially the structure which changes the position of the nozzle with which the front end side of the air tube different from FIG. 12 was mounted | worn The perspective view which shows partially the structure by which the insertion part and the adapter were covered with the inner tube and the outer tube along the insertion / extraction direction. The perspective view which shows partially the structure by which the insertion part and the adapter were covered with the guide tube along the insertion / extraction direction. Sectional view of the guide tube along line XVI-XVI in Fig. 15 The perspective view which shows partially the structure different from FIG. 15, FIG. 16 in the air supply using a guide tube Cross-sectional view of the die along line XVIII-XVIII in FIG. 17 is a cross-sectional view of the cap, the base, and the sheath after the cap is attached to the base of FIG. The perspective view which shows partially the structure which supplies air to a test site | part using the channel provided in the insertion part of an endoscope The perspective view which shows partially the structure which provided the air-feeding conduit and the intake conduit between the outer sheath which covers the insertion part with which the adapter was mounted | worn along the insertion / extraction direction, and the insertion part with which the adapter was mounted | worn The perspective view which shows partially the structure which can attach or detach the nozzle which changes the air supply direction to the channel of an adapter. The perspective view which partially shows the structure which provided the taper surface in the front end surface of the air supply pipe line protruded from the channel of the adapter, and provided the discharge port of the air in this taper part. The perspective view which shows the state where the air tube which has a curved shape was attached to the channel of the adapter partially The perspective view which shows partially the state by which the air supply pipe line which has a flange was mounted | worn with the channel of the adapter A perspective view partially showing a configuration in which an air supply conduit that is hard at the distal end side and soft at the proximal end side can be inserted into the insertion portion and the adapter channel. The perspective view which shows partially the structure which a needle-like member can penetrate in an air supply pipe line The perspective view which shows partially the structure which changes the air supply direction of the air from the air tube provided in the outer peripheral surface of the insertion part with which the adapter was mounted | worn along the insertion / extraction direction. The figure which shows roughly the movable range of the tip side of the air tube The perspective view which shows partially the structure which supports an air tube rotatably along the insertion / extraction direction in the outer peripheral surface of the insertion part with which the adapter was mounted | worn. The figure which shows the modification which made the nozzle provided in the front end side of an air tube or an air supply pipe line into the blowback shape The figure which shows the modification which made the nozzle a rectangular shape FIG. 32 is a diagram showing a configuration in which the nozzle of FIG. 32 is formed in an elongated curved shape, and the curved portion is movable forward and backward with respect to the through hole of the fixing member. The figure which shows the structure which provided the tube which supplies air to the observation window of an adapter other than the tube which supplies air to a test site | part along the insertion / extraction direction Q with respect to the outer peripheral surface of the insertion part with which the adapter was mounted | worn. The figure which shows the supply timing of the air of an air control part to the tube which supplies air to a test site | part, and the tube which supplies air to an observation window The perspective view which shows partially the structure by which the nozzle which supplies air to the observation window of an adapter was mounted | worn with the front-end | tip of the channel of the insertion part of the endoscope inserted in the cap and outer sheath of FIG. The perspective view which shows partially the structure which returns the front end side of the insertion part with which the adapter which moves after supplying air to a test site | part was mounted | worn by the bending operation of a bending part. A configuration in which an air tube for supplying air to the test site and three air tubes for posture control of the insertion portion are provided along the insertion / extraction direction Q on the outer peripheral surface of the insertion portion to which the adapter is attached A perspective view partially showing FIG. 38 is a perspective view partially showing a modification of FIG. 38 in which air is supplied from three air tubes for posture control to a region to be examined. The perspective view which shows partially the structure which covers a flexible tube part with the tube formed from the hard member

Embodiments of the present invention will be described below with reference to the drawings. ◎
(First embodiment)
FIG. 1 is a perspective view schematically illustrating the configuration of an endoscope apparatus including the endoscope according to the first embodiment, and FIG. 2 is a partial perspective view illustrating an enlarged operation unit of the endoscope of FIG. It is.

  As shown in FIG. 1, the endoscope apparatus 1 includes a main part that includes an endoscope 5 and an apparatus main body 10 to which the endoscope 5 is connected.

  The endoscope 5 includes an elongated insertion portion 2, an operation portion 3 provided on the base end side in the insertion / extraction direction Q of the insertion portion 2 (hereinafter simply referred to as a base end side), and an extension from the operation portion 3. The main part is constituted by the extended universal cord 4, and the extended end of the universal cord 4 is connected to an apparatus main body 10 having a monitor 11 such as an LCD.

  The insertion portion 2 includes a distal end portion 2s provided on the distal end side in the insertion / extraction direction Q (hereinafter simply referred to as the distal end side), a bending portion 2w provided on the proximal end side of the distal end portion 2s, and the bending portion 2w. The main part is comprised by the flexible tube part 2g provided in the base end side. A known optical adapter 6 is detachably attached to the tip of the tip 2s.

  Further, the flexible tube portion 2g of the insertion portion 2 is covered along the insertion / extraction direction Q with an outer tube 8 formed of, for example, a fluorine-based resin, and the outer periphery on the distal end side of the outer tube 8 is curved. The rear end of the inner tube 7 that covers a part of the portion 2w and the distal end side of the flexible tube portion 2g along the insertion / extraction direction Q is covered.

  The inner tube 7 is preferably formed from a softer member than the outer tube 8. This is because if the inner tube 7 is formed of a hard member, the inner tube 7 prevents the bending of the bending portion 2w covered by the inner tube 7.

  A fixing member 18 provided with a tube support member 19 that supports an air tube 20 that is a tube member to be described later is fixed to the outer peripheral surface of the distal end portion 2s.

  The operation unit 3 is provided with a bending operation lever 3w that gives an instruction to bend the bending portion 2w in, for example, four directions, up, down, left, and right, and a switching valve 17 interposed in a midway position of the air tube 20 described later. And a switching operation lever 3r for performing a switching operation of the switching valve 17.

  As shown in FIG. 2, a changeover switch 17 s is provided on the upper portion of the changeover valve 17, and gas that flows in the air tube 20 is turned on and off by operating the changeover operation lever 3 r. A certain air supply cut-off can be switched.

  Returning to FIG. 1, an air tube 20 is provided along the outer peripheral surface of the insertion portion 2, the operation portion 3, and the universal cord 4.

  The air tube 20 is positioned along the outer circumferential surface of the universal cord 4, the operation unit 3, and the insertion unit 2, and is disposed from the apparatus main body 10 so that the nozzle 200 mounted on the distal end side protrudes further toward the distal end side than the adapter 6. The air in the air cylinder 15 which is an extended gas supply source, which will be described later, is supplied from the nozzle 200 to the test site to remove dirt such as oil adhering to the test site. It is used for observation.

  A portion of the air tube 20 along the outer peripheral surface of the universal cord 4 is inserted into the universal cord covered tube 9 together with the universal cord 4. As a result, the two cords between the apparatus main body 10 and the operation unit 3 are combined into one by the universal cord covering tube 9.

  Further, the switching valve 17 described above is interposed in a portion along the outer peripheral surface of the operation unit 3 of the air tube 20.

  Furthermore, the portions along the flexible tube portion 2 g and the curved portion 2 w of the insertion portion 2 of the air tube 20 are inserted into the outer tube 8 and the inner tube 7. This prevents the portion of the insertion portion 2 of the air tube 20 along the flexible tube portion 2g and the bending portion 2w from being detached from the outer peripheral surfaces of the flexible tube portion 2g and the bending portion 2w. .

  Further, the portion of the air tube 20 protruding from the inner tube 7 to the distal end side is inserted into the tube support member 19 through the through-hole 19h formed along the insertion / extraction direction Q, thereby the tube support member 19 The nozzle 200 mounted on the distal end side of the air tube 20 is supported so as to be slidable back and forth in the insertion / extraction direction Q so as to protrude further toward the distal end side than the distal end of the adapter 6.

  Therefore, even if the bending portion 2w is operated to bend, the air tube 20 slides back and forth along the insertion / removal direction Q through the through hole 19h. Therefore, the air tube 20 makes it difficult for the bending portion 2w to be bent. Is prevented. This is because if the air tube 20 is fixed to the through hole 19h, the air tube 20 tends to move in the insertion / extraction direction Q when the bending portion 2w is bent. This is because it may be damaged.

  Note that the amount of protrusion of the nozzle 200 from the tip of the adapter 6 is always set to an amount that the nozzle 200 protrudes from the tip of the adapter 6 even if the air tube 20 slides backward in the insertion / extraction direction Q. Yes.

  This is because, for example, when air is discharged from the nozzle 200 in order to remove the oil at the site to be examined, if the nozzle 200 is positioned closer to the proximal end than the distal end of the adapter 6, the removed oil is observed by the adapter 6. This is because it may adhere to the window.

  Further, a portion of the air tube 20 that is closer to the distal end than the proximal end of the curved portion 2w (hereinafter referred to as a distal end portion) 20a is a portion that is proximal to the distal end portion 20a (hereinafter referred to as a proximal end portion). The tip end side is easily bent by being formed with a smaller diameter than 20b. Furthermore, the base end side portion 20b is formed of a hard member, for example, a fluorine-based resin, and the tip end side portion 20a is softer than the base end side portion 20b, for example, fluorine foam. You may form from resin.

  Since the distal end side portion 20a along the outer peripheral surface of the curved portion 2w is softer with a smaller diameter than the proximal end portion 20b, the air tube 20 prevents the curved portion 2w from becoming difficult to bend. ing. Further, since the distal end side portion 20a is smaller in diameter than the proximal end side portion 20b, the flow velocity of air flowing through the distal end side portion 20a is faster due to the venturi effect than the flow velocity of air flowing through the proximal end side portion 20b.

  The entire air tube 20 is not formed to have the same diameter as the distal end portion 20a, but the diameter of the proximal end portion 20b is larger than that of the distal end portion 20a. This is because it is desired to secure a flow rate of air flowing through the air.

  In addition, the base end portion 20b is not formed from a soft member, for example, a foamed fluororesin, because a small amount of air flowing through the flow path leaks from the foamed fluororesin, This is to minimize it.

  The length L1 in the insertion / extraction direction Q of the distal end side portion 20a is set to be longer than the length L2 in the insertion / extraction direction Q of the bending portion 2w (L1> L2).

  In addition to the monitor 11, the apparatus main body 10 has a regulator 12 in which the base end of the air tube 20, that is, the base end of the base end side portion 20 b, is connected to the back surface, a joint 13 connected to the regulator 12, A base 14 to which the joint 13 is connected and an air cylinder 15 detachably attached to the base 14 are provided.

  The air in the air cylinder 15 is supplied from the nozzle 200 to the test site via the base 14, the joint 13, the regulator 12, the base end side portion 20 b and the tip end side portion 20 a of the air tube 20. As described above, the air supply is shut off by the operator operating the switching operation lever 3r and turning on / off the switching switch 17s.

  Further, the air cylinder 15 may not be provided in the apparatus main body 10. Specifically, it may be configured to be directly connectable to the base end of the base end side portion 20b of the air tube 20. In this case, in order to improve workability, it is preferable that the air cylinder 15 has a configuration that can be directly attached to the operator by a hook or the like.

  Thus, in the present embodiment, the distal end portion 20a of the air tube 20 is inserted into and removed from the through hole 19h of the tube support member 19 provided in the fixing member 18 fixed to the outer peripheral surface of the distal end portion 2s. It is shown that the tube is supported by the tube support member 19 by being inserted through Q so as to be slidable back and forth.

  According to this, when the bending portion 2w is bent, the air tube 20 slides back and forth in the through hole 19h in the insertion / removal direction Q, so that the air tube 20 prevents the bending portion 2w from bending. There is no end.

  Moreover, it showed that the inner tube 7 which covers the curved part 2w of the insertion part 2 was formed from the member softer than the outer tube 8 which covers the flexible tube part 2g. According to this, when the inner tube 7 is formed from a hard member, it is possible to prevent the bending of the bending portion 2w from being hindered.

  Furthermore, it was shown that the distal end side portion 20a along the outer peripheral surface of the curved portion 2w of the air tube 20 is formed of a softer member than the proximal end side portion 20b. According to this, it is possible to prevent the bending of the bending portion 2w from being hindered by forming the distal end portion 20a from a hard member.

  As described above, the endoscope 5 having a configuration capable of reliably supplying air at a flow rate capable of removing foreign matter from the test site from the nozzle to the test site without hindering the bending of the bending portion 2w is provided. be able to.

(Second Embodiment)
3 is a perspective view partially showing the distal end side of the insertion portion of the endoscope of the present embodiment, and FIG. 4 is a connection aspect of the distal end side portion and the proximal end side portion of the air tube with respect to the connecting member of FIG. FIG. 5 is a cross-sectional view of the outer tube in the vicinity of the connecting member along the line VV in FIG.

  The configuration of the endoscope according to the second embodiment covers the entire insertion portion and the adapter along the insertion / extraction direction as compared with the endoscope according to the first embodiment shown in FIGS. 1 and 2 described above. The point that the air tube is inserted into the outer tube is different from the point that the air tube is formed by connecting two tubes having different diameters.

  Therefore, only this difference will be described, the same reference numerals are given to the same components as those in the first embodiment, and the description thereof will be omitted.

  As shown in FIG. 3, in the present embodiment, the insertion portion 2 and the adapter 6 of the endoscope are covered by the outer tube 8 along the insertion / extraction direction Q, and the inside 8 i of the outer tube 8 The air tube 20 is slidably inserted in the insertion / extraction direction Q together with the insertion portion 2 to which the adapter 6 is attached. In the present embodiment, the outer tube 8 is formed of a soft member such as foamed fluororesin so as not to hinder the bending of the bending portion 2w.

  Further, in the first embodiment described above, the air tube 20 has the base end side portion 20b and the tip end side portion 20a having a smaller diameter than the base end side portion 20b formed from a single air tube. However, in the present embodiment, after the distal end side portion 20a and the proximal end side portion 20b are formed separately, the connecting member 21 is connected to the bending portion 2w at a position shifted in the insertion / extraction direction Q. Has been.

  Specifically, the base end side portion 20b is made of a fluorine-based resin as in the first embodiment, and the tip end side portion 20a is made of a softer member than the base end side portion 20b, for example, a foamed fluorine-based resin. The diameter is smaller than that of the proximal end portion 20b. The distal end side portion 20a and the proximal end side portion 20b are formed in a circular shape.

In addition, when the distal end side portion 20a is formed of a foam member, in order to prevent air from leaking from the portion 20a, a portion closer to the proximal end in the insertion / extraction direction Q than the curved portion 2w of the distal end side portion 20a. Is covered with a curved tube 300 made of, for example, Teflon (registered trademark).
Further, at the position of the curved portion 2w of the distal end side portion 20a, when it is necessary to reduce the outer diameter, it is possible to facilitate insertion into a narrow place as a flattened shape (elliptical shape, etc.). Conceivable.
Further, in order to increase the flow rate of air injection and increase the force to fly oil or dust, only the tip, for example, a part of the adapter 6 may be made thin and flat.

  In addition, as in the first embodiment described above, the curved tube 300 is configured such that the air tube 20 is configured by one tube, and further, when the air tube 20 is formed by a foam member, the distal end side portion 20a. The base part 20b may be covered not only with the base part in the insertion / extraction direction Q from the curved part 2w.

  As shown in FIG. 4, the connecting member 21 includes a flange portion 21f having a flow passage therein, a first connection pipe 21a having a flow passage inside connected to one end side of the flange portion 21f, and a flange portion. The first connecting pipe 21a in 21f includes a second connecting pipe 21b having a flow path inside connected to the other end side opposite to the insertion / extraction direction Q, and is made of, for example, metal.

  The first connecting pipe 21a and the second connecting pipe 21b are formed in an elliptical shape, and the first connecting pipe 21a is formed to have a slightly larger diameter than the distal end side portion 20a. The tube 21b is also formed with a slightly larger diameter than the proximal end side portion 20b.

  The first connecting tube 21a is connected to the proximal end side of the distal end side portion 20a, and the second connecting tube 21b is connected to the distal end side of the proximal end side portion 20b. Thereby, the connecting member 21 connects the first connecting pipe 21a and the second connecting pipe 21b.

  When the distal end side of the proximal end side portion 20b is connected to the second connecting pipe 21b, as shown in FIG. 5, the second connecting tube 21b is elliptical at the distal end side of the circular proximal end side portion 20b. As it is formed, it deforms into an elliptical shape. Accordingly, the outer diameter of the outer tube 8 in the vicinity of the connecting member 21 is smaller than that in the case where the proximal end portion 20b is connected to the connecting member 21 while being circular. In addition, the above is the same also in the site | part by which the base end side of the front end side site | part 20a was connected to the 1st connection pipe 21a.

  In addition, although the distal end side portion 20a and the proximal end side portion 20b are formed in a circular shape, in reality, when the distal end portion 20a and the proximal end portion 20b are inserted into the outer tube 8, portions other than the connection portion to the connecting member 21 are also formed in the outer tube 8. Pressed and deformed into an oval shape.

  Thus, in the present embodiment, the air tube 20 is inserted in the inside 8i of the outer tube 8 together with the insertion portion 2 to which the adapter 6 is attached, and the air tube 20 slides in the insertion / extraction direction Q. Shown that it is free to move.

  According to this, even if the bending portion 2w is bent, the air tube 20 slides in the insertion / extraction direction Q in the inside 8i of the outer tube 8, so that the air tube 20 inhibits the bending of the bending portion 2w. There is no end to it.

  Further, since the distal end side portion 20a is formed of a softer member than the proximal end side portion 20b and has a smaller diameter than the proximal end side portion 20b, the air tube is similar to the above-described first embodiment. 20 does not hinder the bending of the bending portion 2w.

  Furthermore, since the outer tube 8 that covers the bending portion 2w is formed of a soft member, for example, a foamed fluororesin, the outer tube 8 does not hinder the bending of the bending portion 2w.

Further, since the connecting member 21 that connects the distal end side portion 20a and the proximal end side portion 20b is positioned away from the bending portion 2w in the insertion / extraction direction Q, the connecting member 21 inhibits the bending of the bending portion 2w. There is no end to it. Other effects are the same as those of the first embodiment described above.
Further, when performing a bending operation, a load is easily applied in the vicinity of the bending portion 2w, so that the connecting member 21 is shifted toward the proximal side of the bending portion 2w so that an excessive force is not applied between the air tube and the connecting member 21. Arranged. Thereby, the effect of making it difficult to disconnect can be expected.

(Third embodiment)
FIG. 6 is a perspective view partially showing the distal end side of the insertion portion of the endoscope according to the present embodiment. ◎
The configuration of the endoscope according to the third embodiment is an air tube with respect to the outer peripheral surface of the insertion portion and the adapter as compared with the endoscope according to the first embodiment shown in FIGS. The point which fixes the front-end | tip side site | part of 2 and the point from which the air tube is formed by connecting two tubes with different diameters differ.

  Therefore, only this difference will be described, the same reference numerals are given to the same components as those in the first embodiment, and the description thereof will be omitted.

  As shown in FIG. 6, fixing members 22α and 22β for supporting the distal end portion 20a of the air tube 20 are provided on the outer peripheral surface of the adapter 6 and the outer peripheral surface of the distal end portion of the flexible tube portion 2g. Also, a fixing member 22γ that supports the proximal end portion 20b of the air tube 20 is provided at a midway position of the flexible tube portion 2g.

  The distal end side portion 20a and the proximal end side portion 20b are connected by the connecting member 21 at a position shifted in the insertion / extraction direction Q from the bending portion 2w, as in the second embodiment.

  The fixing members 22α to 22γ are formed of a spring-like member, and have a first insertion portion 22a through which the insertion portion 2 and the adapter 6 are inserted, and a second insertion portion 22b through which the air tube 20 is inserted. doing.

  By inserting the insertion portion 2 and the adapter 6 into the first insertion portion 22a, the fixing members 22α to 22γ are fixed to the outer peripheral surfaces of the insertion portion 2 and the adapter 6 with elastic force.

  Further, the distal end side portion 20a of the air tube 20 is slidably inserted along the insertion / extraction direction Q with respect to the second insertion portions 22b of the fixing members 22α and 22β. In addition, with respect to the second insertion portion 22b of the fixing member 22γ, the proximal end portion 20b is fixed after insertion so that the proximal end portion 20b does not move in the insertion / extraction direction Q.

  According to such a configuration, when the bending portion 2w is bent, the distal end portion 20a of the air tube 20 slides along the insertion / extraction direction Q with respect to the second insertion portions 22b of the fixing members 22α and 22β. Since it moves, the air tube 20 does not prevent the bending of the bending portion 2w.

  Other effects are the same as those of the first and second embodiments described above. Also in this configuration, the nozzle 200 may be provided at the tip of the tip side portion 20a. Further, the distal end of the distal end side portion 20 a may protrude from the distal end surface of the adapter 6 toward the distal end side in the insertion / extraction direction Q.

  In addition to the configurations shown in the first to third embodiments described above, as a configuration that can reliably supply air from the tip of the air tube 20 to the test site without hindering the bending of the bending portion 2w. May be configured as shown in FIGS.

  7 is a perspective view partially showing a configuration of a modification on the distal end side of the insertion portion of the endoscope, FIG. 8 is a partial cross-sectional view taken along line VIII-VIII in FIG. 7, and FIG. It is a perspective view which shows the state which removed the nozzle | cap | die, the fixing knob, and the air tube from the outer tube, and removed the air tube from the cap together with the cap on the outer tube base end side.

  As shown in FIG. 7, in this configuration, the outer tube 8 is covered along the insertion / extraction direction Q up to the distal end side of the flexible tube portion 2 g of the insertion portion 2, and the proximal end side of the outer tube 8 is As shown in FIG. 9, a base 29 having a joint 30 for supplying air to the inside 8i is provided.

As shown in FIG. 8, the distal end of the outer peripheral surface of the outer tube 8 has a crank shape along the insertion / extraction direction Q, and a disc portion 23t that closes the inside 8i of the outer tube 8 at a midway position in the insertion / extraction direction Q. A base 23 formed with is fitted. The disc portion 23t is formed with a first hole 23r1 through which the insertion portion 2 is inserted, and a hole 23r2 through which the proximal end side of the connecting conduit 28 is inserted and fixed.
Further, as shown in FIG. 9, a female screw 23 n is formed on the inner peripheral surface of the base 23 on the tip side of the disc portion 23 t, and the female screw 23 n is formed on the outer peripheral surface of the fixing knob 24. The male screw 24n can be screwed together. As a result, the fixing knob 24 can be freely fitted to the inner peripheral surface of the base 23.

  As shown in FIG. 8, a ring-shaped sealing material 26 having a through hole 26r1 through which the insertion portion 2 can be inserted is abutted and provided at the distal end surface of the disc portion 23t of the base 23.

  A through hole 26r2 that penetrates along the insertion / extraction direction Q is formed in a part of the sealing material 26. The connecting conduit 28 is inserted through the through hole 26r2.

  Further, a ring-shaped washer 27 having a through hole 27r1 through which the insertion portion 2 can be inserted is provided on the distal end side in the insertion / extraction direction Q with respect to the seal material 26. In addition, a through hole 27r2 penetrating along the insertion / extraction direction Q is formed in a part of the washer 27, and the connecting pipe line 28 is inserted through the through hole 27r2.

  When the fixing knob 24 is fitted to the inner peripheral surface of the base 23, the sealing member 26 is pressed against the crank portion of the base 23 through the washer 27 toward the base end side in the insertion / extraction direction Q. 26 is expanded radially outward. As a result, as shown in FIG. 8, the inserted portion 2 is fixed by the expanded sealing material 26, and the sealing material 26 contacts the outer peripheral surface of the inserting portion 2 and the inner peripheral surface of the base 23 with pressure. The connecting pipe line 28 is fixed by the through-hole 26r2 contracted by this.

  The distal end side of the connecting conduit 28 is fitted into the inner peripheral surface on the proximal end side of the air tube 20, and the distal end side of the air tube 20 has two through holes 25r1 and 25r2, that is, in a multi-lumen shape. The cap 25 thus formed is inserted and fixed in the through hole 25r2.

In this configuration, as shown in FIG. 7, the bending portion 2 w in the insertion portion 2 is not covered with any member. Further, as shown in FIG. 7, the air tube 20 is fixed to the cap 25 and the base 23 so that the portions of the air tube 20 positioned along the outer peripheral surface of the curved portion 2 w cause slack.
The amount of sag is set to a length equal to or longer than the length of the outer peripheral side of the curved shape of the bending portion 2w when the bending portion 2w performs a bending operation.

  Further, in this configuration, the inside 8 i of the outer tube 8 constitutes a conduit that supplies air from the proximal end side to the distal end side of the insertion portion 2 along the insertion / extraction direction Q. The air supplied from the joint 30 to the inside 8i is supplied to the inside 20i of the air tube 20 via the inside 28i of the connecting pipe 28, and then supplied from the tip of the air tube 20 to the test site. It has become.

  Therefore, unlike the configurations shown in the first to third embodiments, it is not necessary to extend the air tube 20 to the apparatus main body 10, and air can be supplied using the inside 8 i of the outer tube 8. The air supply flow rate is increased as compared with the first to third embodiments.

  Moreover, since the pipe diameter of the connection pipe line 28 is smaller than the diameter of the inside 8i of the outer tube 8, the flow velocity of the air flowing through the connection pipe line 28 can be improved by the venturi effect.

  Thus, according to this configuration, the air tube 20 is fixed so that no member is covered on the outer periphery of the bending portion 2w and the portion along the bending portion 2w of the air tube 20 has a slack. Therefore, the bending of the bending portion 2w is not hindered by the slack of the portion along the bending portion 2w of the air tube 20.

  FIG. 10 is a perspective view partially showing a modification in which the outer tube of FIG. 7 is composed of a multi-lumen tube.

  7 to 9, a base 23 is provided at the tip of the outer tube 8, and a through-hole 26 r 2 of the sealing material 26 and a washer 27 are provided in a groove 23 r provided in a part of the inner peripheral surface of the base 23. The base end of the connecting pipe line 28 inserted through the through hole 27r2 is inserted and fixed.

  However, as shown in FIG. 10, by forming the outer tube 8 in a so-called multi-lumen tube having through holes 8r1 and 8r2, for example, by PTFE, the base end of the connecting pipe line 28 is inserted into the through hole 8r2. It may be configured to be fixed.

  FIG. 11 is a perspective view showing a configuration different from that shown in FIGS. 7 to 9 in which a portion along the curved portion of the air tube is slackened.

  In the configuration shown in FIG. 11, the flexible tube portion 2 g of the insertion portion 2 is covered by the inner tube 31 along the insertion / extraction direction Q, and the inner tube 31 extends along the insertion / extraction direction Q. 8 is covered.

  Further, the air tube 20 covered with the outer conduit 36 is inserted between the inner tube 31 and the outer tube 8. A joint 35 for supplying air to the air tube 20 is provided at the base end portion of the air tube 20. The outer conduit 36 covers the air tube 20 up to the distal end portion of the inner tube 31.

  Also in this configuration, the air tube 20 is made of foamed fluororesin or the like in order to make it softer. Here, as described above, air may leak from the foamed fluororesin. Therefore, there is a case where the air leaked from the air tube 20 in the portion covered by the outer conduit 36 leaks from the tip of the outer conduit 36 to the outside. In order to prevent this, the sealing tube 32 is covered between the outer peripheral surface on the distal end side of the outer conduit 36 and the outer peripheral surface of the air tube 20.

  In addition, the coil member 33 is fixed to the air tube 20 extending from the outer conduit 36 toward the distal end side in the insertion / extraction direction Q by bonding, soldering, or the like. The coil member 33 is formed in advance with an inner diameter smaller than the outer diameter of the insertion portion 2. The coil member 33 fixes the insertion part 2.

  Here, in order to fix the insertion portion 2 to which the adapter 6 is mounted using the coil member 33, first, the operator places the coil so that the inner diameter of the coil member 33 is larger than the outer diameter of the insertion portion 2. After rotating in one direction, the insertion portion 2 with the adapter 6 attached is inserted inside. Thereafter, when the operator releases his / her hand from the coil member 33, the inner diameter of the coil decreases by rotating in the direction opposite to the one direction. As a result, when the coil contacts the insertion portion 2 and the outer peripheral surface of the adapter 6 with pressure, the insertion portion 2 to which the adapter 6 is attached is fixed inside the coil member 33.

  In addition, when fixing the insertion part 2 with which the adapter 6 was mounted | worn using the coil member 33, the insertion part 2 is in the position where slack arises in the site | part of the air tube 20 located along the outer periphery of the curved part 2w. To fix.

  Even with such a configuration, the same effects as the configurations of FIGS.

  12 is a perspective view partially showing a configuration for changing the position of the nozzle attached to the distal end side of the air tube attached to the outer peripheral surface of the insertion portion and the adapter, and FIG. 13 is a view of an air tube different from FIG. It is a perspective view which shows partially the structure which changes the position of the nozzle with which the front end side was mounted | worn.

  By the way, in the configuration shown in the first to third embodiments described above, the distal end side portion 20a of the air tube 20 is shown to be fixed in parallel with the insertion portion 2, but the position of the distal end side portion 20a is shown. There has been a demand for a configuration that can change the angle. That is, a configuration capable of discharging air in a direction different from the observation direction of the adapter 6 has been desired.

  Therefore, as shown in FIG. 12, the nozzle 200 attached to the distal end side of the air tube 20 has the same configuration as the fixing members 22α to 22γ shown in FIG. It is supported by a detachable fixing member 22 '. Also in this case, it is preferable that the nozzle 200 is supported so that a portion along the curved portion 2w of the air tube 20 has a slack.

  As shown in FIG. 12, the two fixing members 22 'are slidably movable in the outer peripheral direction of the adapter 6 and the tip portion 2s with respect to the outer peripheral surfaces of the adapter 6 and the tip portion 2s. Thus, if any one fixing member 22 ′ is slid in the outer circumferential direction, the nozzle 200 attached to the distal end side of the air tube 20 is not parallel to the insertion portion 2.

  That is, since the distal end side of the air tube 20 can be directed in a direction different from the observation direction of the adapter 6, air can be discharged in a direction different from the observation direction of the adapter 6. It is possible to avoid the oil, water, dust, etc. on the surface from flying and adhering to the front surface of the adapter. At this time, since the slack is formed in the portion along the curved portion 2w of the air tube 20, the sliding of the fixing member 22 'is not hindered.

  Further, as shown in FIG. 13, for example, the above-described fixing member 18 fixed to the outer peripheral surface of the adapter is provided with a rotating member 38 that is rotatable within the surface of the fixing member 18. If the nozzle 200 attached to the distal end side of the air tube 20 is fixed, the nozzle 200 can be directed in a direction different from the observation direction of the adapter 6 only by rotating the rotating member 38. Air can be discharged in a direction different from the observation direction. As in FIG. 12, at this time, since the slack is formed in the portion along the curved portion 2 w of the air tube 20, the rotation of the rotation member 38 is not hindered.

  FIG. 14 is a perspective view partially showing a configuration in which the insertion portion and the adapter are covered by the inner tube and the outer tube along the insertion / extraction direction.

  By the way, as a structure which supplies air to a test site | part, as shown in FIG. 14, the structure which covered the insertion part 2 and the adapter 6 along the insertion / extraction direction Q using inner tube 31 'and the outer tube 8 is used. You may use.

  Specifically, the inner tube 31 ′ is along the insertion / extraction direction Q that forms a through-hole 31 r 1 along the insertion / extraction direction Q through which the insertion portion 2 to which the adapter 6 is attached is inserted, and a passage through which air passes. It comprises a so-called multi-lumen tube having a through hole 31r2.

  The inner tube 31 ′ covers the insertion portion 2 and the adapter 6 along the insertion / extraction direction Q, and the outer tube 8 covers the outer periphery of the inner tube 31 ′ located in the flexible tube portion 2 g of the insertion portion 2. It is configured.

  The inner tube 31 'is formed of a member softer than the outer tube 8, such as silicon or polyurethane. This is to prevent the inner tube 31 'from obstructing the bending of the bending portion 2w. Further, since the outer tube 8 is formed of a member harder than the inner tube 31 ′, for example, PTFE, the insertion property of the insertion portion 2 into the test site is improved.

  According to such a configuration, the air supplied from the air cylinder passes through the through hole 31r2 and is supplied from the tip of the through hole 31r2 to the test site. In this way, air may be supplied to the test site using the inner tube 31 ′ and the outer tube 8.

  By the way, when air is supplied to the test site, there is a problem that the oil removed from the test site adheres to the observation window of the adapter 6. Hereinafter, a configuration for avoiding such a problem will be described with reference to FIGS. 15 and 16.

  15 is a perspective view partially showing a configuration in which the insertion portion and the adapter are covered by the guide tube along the insertion / extraction direction, and FIG. 16 is a cross-sectional view of the guide tube along the line XVI-XVI in FIG. is there.

  As a configuration for supplying air to the site to be examined, a configuration in which the guide tube 40 is used to cover the insertion portion 2 and the adapter 6 along the insertion / extraction direction Q as shown in FIG.

  Specifically, as shown in FIGS. 15 and 16, the guide tube 40 has a base member 41 on the distal end side, and is formed of a flexible member on the outer periphery of the base end side of the base member 41. The distal end side of the tube 48 thus fixed is fixed by, for example, adhesion after thread winding.

  The proximal end side of the tube 48 is fixed to the distal end side of the connecting member 46, and the proximal end side of the connecting member 46 is formed of a member harder than the tube 48, for example, Teflon (registered trademark). The distal end side of the sheath 49 is fixed.

  Furthermore, the outer periphery of the tube 48, the connecting member 46, and the sheath 49 is covered with a metal mesh tube 47. The metal mesh tube 47 is fixed to the outer periphery of the connecting member by, for example, thread winding bonding, Is fixed to the outer periphery of the base end side of the base member 41.

A base member 42 is also provided on the base end side of the guide tube 40, and the base member 42 has a fixing ring 44 for fixing the insertion portion 2 inserted into the inside 40 i and an inside 40 i of the guide tube 40. A joint 43 for supplying air is provided.
The inside 40i of the guide tube 40 constitutes a space through which the insertion portion 2 to which the adapter 6 is attached is inserted.

  A through hole 41r1 through which the insertion portion 2 to which the adapter 6 is attached is inserted and a through hole 41r2 different from the through hole 41r1 are formed in the base member 41 along the insertion / extraction direction Q.

  An O-ring 50 is provided on the inner peripheral surface of the through hole 41r1, and the O-ring 50 abuts on the outer peripheral surface of the adapter 6 or the insertion portion 2 that is inserted through the through-hole 41r1.

  Further, a hood 45 that can be opened and closed with respect to the through hole 41r1 is provided on the distal end surface of the base member 41. The hood 45 is normally closed with respect to the through hole 41r1, and the insertion portion 2 with the adapter 6 attached to the distal end side is protruded from the inside 40i of the guide tube 40 through the through hole 41r1. At this time, it is opened by the insertion portion 2 to which the adapter 6 is attached. The hood 45 prevents oil or the like removed from the test site from supplying air to the observation window of the adapter 6.

  The through hole 41r2 is a hole for supplying the air introduced into the inside 40i of the guide tube 40 through the joint 43 to the test site.

  It should be noted that when air is supplied from the through hole 41r2 to the test site, the adapter 6 is completely drawn into the interior 40i of the guide tube 40, and the through hole 41r1 is blocked by the hood 45. As shown in FIG. 16, it is preferable that the adapter 6 is pulled into a position where the hood 45 is closed by about half.

  This is because the hood 45 prevents the oil removed from the test site by supplying air from adhering to the observation window of the adapter 6.

  In this way, air may be supplied to the test site using the guide tube 40.

  17 is a perspective view partially showing a configuration different from that of FIGS. 15 and 16 in air supply using a guide tube, and FIG. 18 is a cross-sectional view of the base along the line XVIII-XVIII in FIG. 19 is a cross-sectional view of the cap, the base, and the sheath after the cap is attached to the base of FIG.

  As shown in FIGS. 17 and 19, the tube 48 of the guide tube 140 is fixed to the outer periphery on the base end side of the base 51 having a crank shape along the insertion / extraction direction Q, and the inner periphery on the front end side of the base 51. A male screw 52n formed on the outer peripheral surface of the cap 52 can be screwed into the female screw 51n formed on the surface.

  As shown in FIGS. 18 and 19, a groove 51m along the insertion / extraction direction Q is formed in a part of the inner peripheral surface of the base 51, and the tip of the crank portion 51k is formed on the inner peripheral surface of the base 51. A ring-shaped sealing material 53 that abuts the surface is provided. Further, a ring-shaped washer 54 is provided on the front end side of the sealing material 53.

  In such a configuration, an operator can fix the distal end side of the insertion portion 2 to which the adapter 6 penetrating the inside 48i of the tube 48, the inside of the sealing material 53, and the inside of the cap 52 is attached to the guide tube 140. First, the male screw 52n of the cap 52 is screwed into the female screw 51n of the base 51.

  Thereafter, the sealing material 53 pressed through the washer 54 by the base 51 expands in the radial direction, so that the expanded sealing material 53 comes into contact with the outer peripheral surface of the insertion portion 2 with pressure. As a result, the insertion portion 2 to which the adapter 6 is attached is fixed to the base 51.

  Further, air flowing through the inside 48i of the tube 48 is detected from the tip surface of the groove 51m through a groove (not shown) formed in the tip surface of the crank portion 51k and a space between the sealing material 53 and the female screw 51n. Supplied to the site.

The guide tube 140 having such a configuration may be used to supply air to the test site.
It should be noted that the position of the groove 51m can be made an appropriate position by finely adjusting the position of the cap 52, and can be changed according to the observation direction.

  By the way, when air is supplied to the test site, there is a problem that the oil removed from the test site adheres to the observation window of the adapter 6. Hereinafter, a configuration different from that of FIGS. 15 and 16 that avoids such a problem will be described with reference to FIGS. 20 and 21. FIG.

  FIG. 20 is a perspective view partially showing a configuration in which air is supplied to a region to be examined using a channel provided in the insertion portion of the endoscope.

  As shown in FIG. 20, a channel (not shown) for performing various treatments, for example, on a test site is usually formed inside the insertion portion 2. Note that the adapter 6 attached to the distal end 2 s of the insertion portion 2 is also formed with a channel 6 p that communicates with the channel of the insertion portion 2.

  The intake pipe 56 covering the air supply pipe 55 may be inserted into these channels so as to be movable forward and backward in the insertion / extraction direction Q together with the air supply pipe 55.

  The air supply pipe 55 is a pipe that supplies air to the test site, and the intake pipe 56 is a pipe that sucks the atmosphere in the vicinity of the test site. In other words, the atmosphere in the vicinity of the test site is sucked from the space 56 i between the outer peripheral surface of the air supply conduit 55 and the inner peripheral surface of the intake conduit 56.

  According to such a configuration, it is possible to inhale, for example, oil removed from the test site by air supply from the air supply line 55 using the space 56i of the intake line 56. It is possible to prevent oil removed by air supply from adhering to the observation window 6t.

  FIG. 21 partially shows a configuration in which an air supply conduit and an intake conduit are provided between an outer sheath that covers the insertion portion to which the adapter is attached along the insertion / extraction direction and the insertion portion to which the adapter is attached. It is a perspective view.

  As shown in FIG. 21, in the configuration in which the outer tube 8 covers the insertion portion 2 to which the adapter 6 is attached along the insertion / extraction direction Q, between the outer tube 8 and the insertion portion 2 to which the adapter 6 is attached. An air supply line 55 and an intake line 56 may be provided in the interior 8i.

  Even with such a configuration, for example, oil removed from the test site by air supply from the air supply pipe 55 can be sucked using the intake pipe 56, so that the observation window of the adapter 6 can be used. It is possible to prevent the oil removed by air supply from adhering to 6t.

  FIG. 22 is a perspective view partially showing a configuration in which a nozzle for changing the air feeding direction is detachable from the channel of the adapter.

  By the way, even when the channel 6p of the adapter 6 is used, a configuration capable of discharging air in a direction different from the observation direction of the adapter 6 has been desired.

  Therefore, as shown in FIG. 22, a female screw 6pn is formed on the inner peripheral surface of the adapter 6 on the front end side of the channel 6p, and a male screw 57n formed on the outer peripheral surface of the nozzle 57 is screwed into the female screw 6pn. Any configuration may be used.

  A flange 57 f is formed in the middle of the nozzle 57. The flange 57f comes into contact with the distal end surface of the adapter 6 when the male screw 57n is screwed into the female screw 6pn.

  Further, the tip end side of the nozzle 57 is formed in a bent shape, or formed from a shape memory resin or the like, so that it can be deformed into a shape desired by the operator.

  As described above, the nozzle 57 whose tip side is deformed may be detachably attached to the channel 6p of the adapter 6. According to this, air can be discharged in a desired direction in which the nozzle 57 is deformed.

  By the way, when air is supplied to the test site, there is a problem that the oil removed from the test site adheres to the observation window of the adapter 6. Hereinafter, a configuration different from that of FIGS. 15, 16, 20, and 21 that avoids such a problem will be described with reference to FIGS.

  FIG. 23 is a perspective view partially showing a configuration in which a tapered surface is provided on the distal end surface of the air supply pipe projecting from the channel of the adapter, and an air discharge port is provided in the tapered portion.

  Normally, when air is supplied from the discharge port of the air supply line in a state of facing the test site, the oil O removed by the air returns to the discharge port of the air supply line that directly faces the discharge port. Oil O may adhere to the observation window located near the exit.

  Therefore, as shown in FIG. 23, a tapered surface 58k having a predetermined angle is formed on the side surface on the distal end side of the air supply conduit 58 protruding from the channel 6p of the adapter 6, and an air discharge port 58t is formed in the tapered surface 58k. It was set as the structure formed.

  According to this, even if the air supply duct 58 protrudes from the channel 6p in parallel with the insertion portion 2, air is discharged from the discharge port 58t in a direction different from the direction parallel to the insertion portion 2. Therefore, as shown in FIG. 23, the oil O removed by the supply of air scatters outside the range of the visual field range S of the observation window 6t, so that the observation window 6t is prevented from being soiled by the oil O. Can do.

  FIG. 24 is a perspective view partially showing a state where an air tube having a curved shape is attached to a channel of an adapter.

  As shown in FIG. 24, an air tube 59 having a curved shape may be attached to the channel 6 p of the adapter 6. According to this, the air tube 59 having a curved shape can supply air to the test site from an oblique direction with respect to the test site that is different from the observation direction of the observation window 6t. Since the oil O removed by the supply scatters outside the visual field range S of the observation window 6t, the observation window 6t can be prevented from being contaminated by the oil O.

  FIG. 25 is a perspective view partially showing a state where an air supply conduit having a flange is attached to the channel of the adapter.

  As shown in FIG. 25, an air supply conduit 60 having a flange 60 f may be attached to the channel 6 p of the adapter 6.

  According to this, even if the oil O at the site to be examined is scattered due to the air supply from the air supply pipeline 60, the flange 60f prevents the oil O from adhering to the observation window 6t. Can do.

  FIG. 26 is a perspective view partially showing a configuration in which an air supply conduit having a hard distal end and a soft proximal end can be inserted into the insertion portion and the adapter channel, and FIG. 27 is a diagram illustrating a needle-like member inserted in the air supply conduit. It is a perspective view which shows a free structure partially.

  As shown in FIG. 26, an air supply line 55 formed of a member having a distal end portion 55a hard and a proximal end portion 55b softer than the portion 55a in the channel of the insertion portion 2 and the channel 6p of the adapter 6. May be freely inserted.

  At this time, the length L3 in the insertion / extraction direction Q of the portion 55a is set to the same length as the length L4 in the insertion / extraction direction Q of the bending portion 2w (L3 = L4).

  According to this, since the site | part 55a is formed from the hard member, since the site | part 55a is correctly projected straight from the channel 6p of the adapter 6 in parallel with the insertion part 2 to the test site, Accurate air supply from the air supply line 55 to the test site can be realized.

  As described above, since the length L3 in the insertion / extraction direction Q of the portion 55a is set to the same length as the length L4 in the insertion / extraction direction Q of the bending portion 2w (L3 = L4), the channel 6p When all the portions 55a are protruded, the soft portion 55b of the air supply conduit 55 is surely positioned in the channel in the curved portion 2w, so that the air supply conduit 55 does not hinder the bending of the curved portion 2w.

  Even if all of the air supply line 55 is formed of the same soft member as that of the portion 55b, as shown in FIG. 27, if the hard needle-like member 61 is inserted into the air supply line 55, Since the distal end side of the air supply conduit 55 is hardened, the distal end side of the air supply conduit 55 is accurately projected straight from the channel 6p of the adapter 6 to the test site in parallel with the insertion portion 2. From this, it is possible to realize accurate air supply from the air supply pipeline 55 to the test site.

  By the way, as a structure which can discharge air to the direction different from the observation direction of the adapter 6, the structure shown to FIG. 28, FIG. 29 is mentioned.

  FIG. 28 is a perspective view partially showing a configuration in which the air feeding direction from the air tube provided along the insertion / extraction direction is changed on the outer peripheral surface of the insertion portion to which the adapter is attached, and FIG. It is a figure which shows schematically the movable range of the front end side of a tube.

  As shown in FIG. 28, a fixing member 62 is provided on the outer peripheral surface of the adapter 6, and a fixing member 63 is provided on the outer peripheral surface on the distal end side of the flexible tube portion 2g.

  The fixing member 62 includes a first support member 62k that supports the distal end side of the air tube 68 provided along the insertion / extraction direction Q on the outer peripheral surface of the insertion portion 2 to which the adapter 6 is attached. The fixing member 63 is provided with a second support member 63k that supports a midway position of the air tube 68 so as to be swingable by a pin or the like.

  As shown in FIG. 29, the movable range W of the first support member 62k is set so as to be located within the visual field range S of an observation window (not shown) provided in the adapter 6. That is, in the visual field range S, air is discharged from the tip of the air tube 68.

  According to such a configuration, the protruding direction of the air can be changed by swinging the first support member 62k in the movable range W, and the bending portion 2w is inserted and removed as shown in FIG. Since the first support member 62k and the second support member 63k are swingable when the curved portion 2w indicated by a straight line is curved from the dotted line state parallel to Q, the curved portion 2w is curved. There is no hindrance. Furthermore, the alignment of the curved air tube 68 can be easily performed by swinging at least one of the first support member 62k and the second support member 63k.

  FIG. 30 is a perspective view partially showing a configuration in which the air tube is rotatably supported along the insertion / removal direction on the outer peripheral surface of the insertion portion to which the adapter is attached.

  As shown in FIG. 30, the air tube 168 in this configuration is formed of a super elastic member, is formed in a curved shape on the distal end side, and the through hole of the fixing member 64 provided on the outer peripheral surface of the adapter 6 on the distal end side. 64r is inserted and supported, and the midway position is inserted and supported through a through hole 65r of the fixing member 65 provided on the outer peripheral surface of the distal end side of the flexible tube portion 2g, and the proximal end side is supported by the flexible tube portion 2g. Are inserted into and supported by a through hole 66r of a fixing member 66 provided on the outer peripheral surface of the base end side of the base member. The air tube 168 is rotatable with respect to the through holes 64r to 66r.

  Therefore, due to the distal end side of the air tube 168 being curved, the bending portion 2w bends along the curved shape of the air tube 168 as shown in FIG. 29 without performing a bending operation. Yes.

  Further, a motor unit 67 to which the base end portion of the air tube 168 is connected is provided on the outer peripheral surface of the operation unit 3. The motor unit 67 applies rotational force to the air tube 168.

  According to such a configuration, normally, when the bending portion 2w is bent in another direction from the bending state shown in FIG. 29, for example, when the bending portion 2w is bent upward from the state of bending upward, the air Although the tube 168 is twisted, by turning the air tube 168 by the motor unit 67, the bending portion 2w can be bent without the air tube 168 being twisted.

  FIG. 31 is a view showing a modified example in which the nozzle provided on the distal end side of the air tube or the air supply pipe is blown back, FIG. 32 is a view showing a modified example in which the nozzle is rectangular, and FIG. It is a figure which shows the structure which 32 nozzles are formed in an elongate curved shape, and this curved part can be advanced / retreated with respect to the through-hole of a fixing member.

  The nozzle 200 described above is generally formed in a straight line as shown in FIG. 1, for example. However, the present invention is not limited to this, and as shown in FIG. 31, the nozzle 200 has a so-called blow-back shape. It may be formed.

  According to this, when air is not supplied, the nozzle 200 is wound as shown by the solid line in FIG. 31, but when air is supplied, the nozzle 200 is linear as shown by the dotted line in FIG. It becomes possible to supply air to the region to be examined.

  In FIG. 1, the nozzle 200 is formed to have a circular shape. However, as illustrated in FIG. 32, the nozzle 200 may be formed to have a rectangular shape. According to this configuration, air can be discharged in a wider range than when the nozzle 200 is formed in a circular shape.

  Further, as shown in FIG. 33, the nozzle 200 formed in a rectangular shape has a curved shape, and the nozzle 200 is formed with respect to a rectangular through hole 64r ′ of a fixing member 64 ′ provided on the outer peripheral surface of the adapter 6, for example. It may be configured to freely advance and retract.

  According to this, the air supply angle can be varied according to the protruding amount of the nozzle 200 formed in a rectangular shape protruding from the through hole 64r '.

  By the way, when air is supplied to the test site, there is a problem that the oil removed from the test site adheres to the observation window of the adapter 6. Hereinafter, a configuration different from FIGS. 15, 16, 20, 21, and 23 to 25 that avoids such a problem will be described with reference to FIGS. 34 to 36.

  FIG. 34 shows a configuration in which a tube for supplying air to the observation window of the adapter is provided along the insertion / extraction direction Q with respect to the outer peripheral surface of the insertion portion on which the adapter is mounted, in addition to the tube for supplying air to the test site FIG. 35 is a diagram showing the air supply timing of the air control unit to the tube that supplies air to the test site and the tube that supplies air to the observation window.

As shown in FIG. 34, in this configuration, air is supplied to the observation window 6t of the adapter 6 in addition to the air tube 20 that supplies air to the test site described above, and the air is supplied from the air tube 20 An air tube 70 that is removed from the region to be examined and removes dirt adhering to the observation window 6t is provided along the insertion / extraction direction Q with respect to the outer peripheral surface of the insertion portion 2 to which the adapter 6 is attached.
In addition, air flows through the front of the observation window 6t to act as an air curtain, and the air tube 20 injects air to remove oil, dust, etc. at the site to be examined. It also has an effect of making it difficult to adhere to the window 6t.
The distal end side of the air tube 20 and the distal end side of the air tube 70 are fixed to the outer peripheral surface of the adapter 6 by a fixing member 69.

  Further, a nozzle 171 formed in an L shape so that a plurality of discharge ports 71 are directed toward the observation window 6t is attached to the tip of the air tube 70. The discharge port 71 may be composed of one.

  In addition, the air tube 20 is opened and closed by opening and closing the valve 73 under the control of the air control unit 72, and the air from the air cylinder 15 is cut off. The air tube 70 is controlled by the air control unit 72. When the valve 74 is opened and closed, the air in the air cylinder 15 is cut off.

  In addition, when supplying air to the test site, the air control unit 72 first opens the valve 73 and supplies air to the air tube 20 as shown in FIG. It opens and controls to supply air to the air tube 70 is performed.

  This is the timing during the time Δt1 from when air is supplied from the tip of the air tube 20 to the test site to remove the dirt on the test site, and until the removed dirt flies to the observation window 6t. This is also because during this time, if air is supplied from the air tube 70, air is supplied from the air tube 70 to the observation window 6t, so that the air in the air cylinder 15 is wasted.

  In addition, even after removing the contamination on the site to be examined, as shown in FIG. 35, the air control unit 72 first performs control to close the valve 74 after a certain time Δt2 after closing the valve 73. This is because the air jetted from the air tube 20 may cause oil, dust or the like to adhere to the observation window 6t, and takes into account the time lag from when the air in the air tube 20 is stopped until it adheres. .

  According to the opening control of the air control unit 72 to the valves 73 and 74, the limited air in the air cylinder 15 can be used without waste.

  36 is a perspective view partially showing a configuration in which a nozzle for supplying air to the observation window of the adapter is attached to the distal end of the channel of the insertion portion of the endoscope inserted into the cap and the outer sheath of FIG. It is.

  As shown in FIG. 36, an L-shape is formed so that the discharge port 76 is directed to the observation window 6t in the female screw 6pn at the tip of the channel provided in the insertion portion 2 inserted into the cap 25 and the outer tube 8 described above. The male screw 75n of the nozzle 75 that supplies air to the observation window 6t may be freely screwed.

  According to such a configuration, it is possible to use the channel of the insertion section 2 for supplying air for removing dirt on the observation window 6t, simply by mounting the nozzle 75 on the channel of the insertion section 2.

  FIG. 37 is a perspective view partially showing a configuration in which the distal end side of the insertion portion on which the adapter that moves after supplying air to the test site is mounted is returned to the position before the movement by the bending operation of the bending portion. is there.

  Incidentally, as shown in FIG. 36, for example, an endoscope having a configuration for supplying air to a region to be examined, an air tube 20 is provided along the insertion / extraction direction Q on the outer peripheral surface of the insertion portion 2 to which the adapter 6 is attached. In the endoscope which is fixed by the fixing member 22 and the like and has a configuration in which air is supplied from the opening on the distal end side of the air tube 20 to the test site, in particular, as shown by a one-dot chain line in FIG. When air is supplied from the distal end of the air tube 20 in a state where the portion 2w is curved, the distal end side of the insertion portion 2 to which the adapter 6 is attached moves in a direction M1 in which the bending of the bending portion 2w is released. That is, there is a problem that the distal end side of the insertion portion 2 to which the adapter 6 is attached moves to the position indicated by the dotted line in FIG.

  Therefore, in the endoscope apparatus with this configuration, the bending of the bending portion 2w is automatically performed according to the flow rate control unit 75 that controls the flow rate of air supplied to the air tube 20 and the flow rate control of the flow rate control unit 75. In other words, a bending control unit 76 for controlling the operation is provided.

  The bending control unit 76 performs control to bend the bending portion 2w in the direction M2 in which the bending angle increases in accordance with the flow rate of the air supplied to the air tube by the flow rate control unit 75.

  According to such a configuration, as indicated by the one-dot chain line in FIG. 37, the air is supplied from the air tube 20 to the test site with the bending portion 2w being bent, and this is indicated by the dotted line. As described above, even if the distal end side of the insertion portion 2 to which the adapter 6 is attached moves in the direction M1 in which the bending is released, the bending portion 2w in the bending control portion 76 according to the flow rate control of the flow rate control portion 75. By controlling the bending in the direction M2 in which the bending angle increases, the distal end side of the insertion portion 2 to which the adapter 6 is attached automatically returns to the vicinity of the position as indicated by the one-dot chain line. It can prevent shifting.

  FIG. 38 shows that an air tube for supplying air to a test site and three air tubes for controlling the posture of the insertion portion along the insertion / extraction direction Q on the outer peripheral surface of the insertion portion to which the adapter is attached. It is a perspective view which shows the provided structure partially.

  As shown in FIG. 38, on the outer peripheral surface of the insertion portion 2 to which the adapter 6 is attached, an air tube 20 that supplies air to the test site, and three air tubes 82 to control the posture of the insertion portion 2. 84 (the air tube 84 is not shown) is fixed along the insertion / extraction direction Q.

  The outer periphery of the adapter 6 is covered with a cap 88, and the tips of the air tube 20 and the air tubes 82 to 84 are fixed to the cap 88. The air tubes 82 to 84 are fixed at 120 ° intervals with respect to the outer peripheral surface of the cap 88.

  The air tube 20 is a tube that supplies air to a region to be examined, and a supply port 20p is formed so that air is supplied to the distal end side in the insertion / extraction direction Q.

  The air tubes 82 to 84 are for preventing the movement of the distal end side of the insertion portion 2 attached with the adapter 6 by discharging air from at least one tube in accordance with the supply of air from the air tube 20. Yes, the discharge port 85 provided in the air tube 82, the discharge port 86 provided in the air tube 83, and the discharge port 87 (not shown) provided in the air tube 84 (not shown) are in a direction substantially perpendicular to the insertion / extraction direction Q. Each tube 82-84 is opened.

  The air tube 82 is connected to the valve control unit 77 via a valve 78, the air tube 83 is connected to the valve control unit 77 via a valve 79, and the air tube 84 is connected to the valve 80. And is connected to a valve control unit 77. The air tube 20 is connected to the valve control unit 77 via the valve 81.

  The valve control unit 77 is connected to a bending control unit 76 that controls the bending operation of the bending unit 2w.

  According to such a configuration, the valve 81 is opened by the valve control unit 77 in a state where the bending unit 2w is bent using the bending control unit 76, and air is supplied from the supply port 20p of the air tube 20 to the test site. Even if the distal end side of the insertion portion 2 to which the adapter 6 is attached has moved in the direction M1 in which the bending is released, the valve control unit 77 is in accordance with the amount of bending of the bending portion 2w. By opening at least one of the valves 78 to 80 and discharging air from at least one supply port of the discharge ports 85 to 87, the bending angle of the distal end side of the insertion portion 2 to which the adapter 6 is attached is increased. By curving in the direction M2, the distal end side of the insertion portion 2 to which the adapter 6 is attached can be automatically returned to the vicinity of the original position. Therefore, it is possible to prevent the observation position from being greatly shifted.

  Hereinafter, a modification will be described with reference to FIG. FIG. 39 is a perspective view partially showing a modification of FIG. 38 in which air is supplied from three air tubes for posture control to a region to be examined.

  As shown in FIG. 39, in this configuration, the air tube 20 and the valve control unit 81 shown in FIG. 38 are not used. In addition, the discharge ports 85 to 87 of the air tubes 82 to 84 are opened at positions where air is supplied to the test site along the insertion / extraction direction Q. It is comprised so that air can be supplied intensively from 85-87.

  According to such a configuration, the valve control unit 77 opens the valves 78 to 80 and supplies the same amount of air from the discharge ports 85 to 87. It is possible to prevent the distal end side of the inserted insertion portion 2 from moving.

  39, in the curved state in which the bending portion 2w is bent by the bending control portion 76, even if the same amount of air is discharged from each of the discharge ports 85 to 87, the adapter 6 In some cases, the valve controller 77 is discharged from the discharge ports 85 to 87. However, in this case, the valve controller 77 is discharged from the discharge ports 85 to 87. By varying the air flow rate, it is possible to prevent the distal end side of the insertion portion 2 to which the adapter 6 is attached from moving as air is supplied.

  In addition, the configuration shown in FIG. 40 is an example of a configuration that prevents the distal end side of the insertion portion 2 to which the adapter 6 is mounted when air is discharged from the air tube. FIG. 40 is a perspective view partially showing a configuration in which the flexible tube portion is covered with a tube formed of a hard member.

  As shown in FIG. 40, the outer periphery of the flexible tube portion 2g of the insertion portion 2 is covered with a tube 93 formed of a hard member, and the tube 93 together with the flexible tube portion 2g is an air tube. 20 is inserted.

  The air tube 20 protruding from the distal end of the tube 93 is positioned along the curved portion 2 w, the distal end portion 2 s, and the outer peripheral surface of the adapter 6, and the distal end of the cap 92 fixed to the outer peripheral surface of the adapter 6. The through hole 92r is inserted and fixed.

  According to such a configuration, even if air is supplied from the tip of the air tube 20 to the test site, the outer periphery of the flexible tube portion 2g is covered with the tube 93 formed of a hard member. It is possible to prevent the distal end side of the insertion portion 2 to which the adapter 6 is attached from moving.

  In addition, in the structure shown in FIGS. 1-40 mentioned above, although the insertion part 2 of the endoscope 5 showed as an example the structure by which the adapter 6 was mounted | worn with the front-end | tip part 2s, it is not restricted to this. Of course, the configuration shown in FIGS. 1 to 40 described above can be applied even if the adapter 6 is not mounted.

DESCRIPTION OF SYMBOLS 1 ... Endoscope apparatus 2 ... Insertion part 2w ... Bending part 5 ... Endoscope 7 ... Inner tube 8 ... Outer tube 10 ... Apparatus main body 15 ... Air cylinder 19 ... Tube support member 19h ... Through-hole 20 ... Air tube (tube member) )
20a ... distal end side part 20b ... proximal end side part 21 ... connecting member Q ... insertion / extraction direction

Claims (1)

  1. In an endoscope provided with a long and thin insertion portion, and provided with a bending portion that can be bent in a plurality of directions, the distal portion of the insertion portion being oriented in a plurality of directions.
    A tube member that discharges gas to the test site;
    An optical adapter provided at the distal end of the insertion portion in the insertion / extraction direction;
    A first support member provided on an outer peripheral surface of the optical adapter for supporting the distal end side of the tube member in the insertion / extraction direction without interfering with the bending operation when the bending portion is bent; and The tube member can be swung in its movable range so that the discharge direction of the gas discharged from the supported tube member is located within the visual field range of the observation window provided in the optical adapter. A first support member provided swingably about an axis perpendicular to the insertion / extraction direction of the insertion portion;
    A second support member provided on an outer peripheral surface of the flexible tube portion of the insertion portion and slidably supporting an intermediate position in the insertion / extraction direction of the tube member, when the bending portion is curved A second support member provided so as to be swingable around an axis perpendicular to the insertion / extraction direction of the insertion part without interfering with the bending operation;
    The endoscope characterized by having .
JP2009168078A 2009-07-16 2009-07-16 Endoscope Active JP5562588B2 (en)

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WO2014054774A1 (en) * 2012-10-05 2014-04-10 富士フイルム株式会社 Holding device and medical observation system
JP2016139005A (en) * 2015-01-27 2016-08-04 オリンパス株式会社 Endoscope optical adapter and endoscope
JP2015142738A (en) * 2015-02-03 2015-08-06 株式会社エム・ピー・アイ multi-lumen tube for endoscope
JP6512512B2 (en) * 2015-07-03 2019-05-15 オリンパス株式会社 Guide tube for endoscope

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JPH01262514A (en) * 1988-04-14 1989-10-19 Olympus Optical Co Ltd Endoscope
JPH0210802U (en) * 1988-07-05 1990-01-24
JP2892659B2 (en) * 1988-11-24 1999-05-17 オリンパス光学工業株式会社 Endoscope apparatus
JP3004308B2 (en) * 1990-03-28 2000-01-31 オリンパス光学工業株式会社 Endoscope
JP3255448B2 (en) * 1992-04-30 2002-02-12 オリンパス光学工業株式会社 Endoscope apparatus
JP3514847B2 (en) * 1994-11-25 2004-03-31 オリンパス株式会社 Endoscope
JP3485663B2 (en) * 1995-01-13 2004-01-13 オリンパス株式会社 Cover type endoscope
JP4121615B2 (en) * 1997-10-31 2008-07-23 オリンパス株式会社 Endoscope
JP2001198084A (en) * 2000-01-19 2001-07-24 Olympus Optical Co Ltd Endoscope
JP2005131173A (en) * 2003-10-31 2005-05-26 Olympus Corp Externally mounted channel for endoscope
US7566300B2 (en) * 2004-04-15 2009-07-28 Wilson-Cook Medical, Inc. Endoscopic surgical access devices and methods of articulating an external accessory channel
JP4302602B2 (en) * 2004-09-24 2009-07-29 オリンパス株式会社 Endoscopic treatment tool, endoscopic treatment system, and support adapter

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