JP5606815B2 - Endoscope - Google Patents

Description

  The present invention relates to an endoscope that includes an elongated insertion portion and an operation portion that is located behind the insertion portion in the insertion direction.

  Conventionally, in the industrial field, observation, inspection, etc. of scratches, corrosion, etc. in a subject can be performed by inserting a narrow insertion portion into a subject, for example, a boiler, a turbine, an engine, a chemical plant, or a sewer pipe. Endoscopes that can be used are widely used.

  Here, when observation, inspection, etc. in the subject is performed using an industrial endoscope, foreign matter such as oil, dust, filth, etc. in the subject adheres to the observation lens of the endoscope There is. In this case, there is a problem that it becomes difficult to observe and inspect the subject as a result of the foreign matter blocking the viewing field of the endoscope.

  The same applies to endoscopes used in the medical field. When an elongated insertion portion is inserted into a body cavity as a subject, foreign substances such as body fluids and blood in the body cavity are endoscopically viewed. If attached to the observation lens of the mirror, there is a problem that it becomes difficult to observe or inspect the body cavity as a result of the foreign matter blocking the observation visual field of the endoscope.

  In view of such a problem, Patent Documents 1 and 2 describe that an insertion portion of an endoscope is covered with a known cover sheath that covers the insertion portion along the insertion direction, and the insertion portion is covered with the cover sheath. There is disclosed a configuration in which a nozzle for at least one of air supply and water supply for removing dirt on the observation lens by supplying gas or liquid to the observation lens is disclosed.

  Further, in Patent Document 3, a fluid supply pipe is provided in the insertion portion, and at least one of a liquid and a gas supplied via the fluid supply pipe at the tip of the fluid supply pipe is used as an observation lens. On the other hand, a configuration is disclosed in which a nozzle for removing dirt on the observation lens by supplying the nozzle is provided.

  Further, in Patent Document 4, the observation lens is soiled by inserting a fluid supply nozzle into a channel provided in the insertion portion and supplying at least one of liquid and gas from the fluid supply nozzle to the observation lens. A configuration for removal is disclosed.

JP-A-8-191790 JP-A-7-299024 Japanese Patent Laid-Open No. 4-158825 JP 2010-5091 A

  By the way, in an endoscope used in the industrial field, for the purpose of reducing the diameter of the insertion portion or for the purpose of simplifying the configuration, the fluid supply conduit shown in Patent Document 3 There is also an endoscope having a configuration which does not have a channel shown in Patent Document 4.

  Therefore, the configuration of Patent Document 3 and the configuration of Patent Document 4 cannot be applied to remove dirt from the observation lens of the endoscope having such a configuration.

  Moreover, when the endoscope used in the industrial field disclosed in Patent Documents 1 and 2 is inserted into, for example, a sewer pipe, the flow path in the nozzle may be clogged with dirt in the sewer pipe.

  In this case, it is necessary to replace the nozzle. However, in the configurations disclosed in Patent Documents 1 and 2, the nozzle is pulled out from between the insertion portion and the cover sheath, or further, the insertion portion is removed from the outer periphery of the insertion portion. Since the nozzle must be taken out after removing the cover sheath having a length covering along the insertion direction, there has been a problem that the replacement work cannot be easily performed.

  The present invention has been made in view of the above problems, and provides an endoscope having a configuration in which a nozzle that supplies fluid to an observation lens to remove dirt from the observation lens can be easily replaced. For the purpose.

In order to achieve the above object, an endoscope according to an aspect of the present invention is an endoscope including an elongated insertion portion and an operation portion positioned rearward in the insertion direction with respect to the insertion portion. When an adapter is attached to the distal end of the insertion portion in the insertion direction, the insertion portion is detachable with respect to either the outer circumference of the insertion portion in the insertion direction or the outer circumference of the adapter. When the adapter is not attached to the tip, the multi-lumen tube detachably attached to the outer periphery on the tip side in the insertion direction of the insertion portion, and the adapter formed on the multi-lumen tube is attached A first hole formed along the insertion direction through which at least one of the insertion portion and the adapter is inserted and the insertion portion is inserted when the adapter is not mounted; A second hole formed along the insertion direction other than the first hole formed in the tube, and the second hole positioned along the insertion direction on the outer periphery of the insertion portion; When the adapter is mounted, the distal end side is fixed to the multi-lumen tube by being inserted through the distal end side in the insertion direction. When the adapter is mounted, the adapter is mounted on the distal end side in the insertion direction, and the adapter is not mounted. In this case, with respect to the observation lens provided on the distal end side of the insertion portion, a nozzle that ejects liquid together with gas from the distal end in the insertion direction, the distal end having a deformed shape different from other portions, A compressed air source that supplies gas to the nozzle; a liquid supply source that supplies liquid to the nozzle; and the supply of the gas from the compressed air source to the nozzle provided in the operation unit. Switching the cutoff, anda change-over switch which is fixed to the insertion direction proximal end side of the nozzle, the observation lens, when the adapter is mounted on the outer peripheral side surface of the distal end side of the adapter Provided when the adapter is not mounted, provided on the outer peripheral side surface of the insertion portion on the distal end side, and the distal end of the nozzle is located behind the observation lens in the insertion direction. The tip side of the nozzle has a shape that is flattened and deformed without blocking the flow path.
An endoscope according to another aspect of the present invention is an endoscope including an elongated insertion portion and an operation portion that is located behind the insertion portion in the insertion direction. When an adapter is attached to the distal end, the adapter is detachable with respect to either the outer periphery on the distal end side in the insertion direction of the insertion portion or the outer periphery of the adapter, and the adapter is attached to the distal end of the insertion portion. In the case of non-mounting, the multi-lumen tube detachably attached to the outer periphery on the distal end side in the inserting direction of the insertion portion, and the insertion portion formed in the multi-lumen tube when the adapter is mounted When at least one of the adapter is inserted and the adapter is not attached, the insertion portion is inserted, and the first hole formed along the insertion direction is formed in the multi-lumen tube. The second hole formed along the insertion direction other than the first hole, and the second hole positioned along the insertion direction on the outer periphery of the insertion portion, the distal end side in the insertion direction is inserted through the second hole. When the adapter is attached, the distal end side is fixed to the multi-lumen tube. When the adapter is not attached, the adapter is inserted when the adapter is not attached. A nozzle that injects liquid together with gas from the distal end in the insertion direction to the observation lens provided on the distal end side of the section, and the distal end has a deformed shape different from other parts, and supplies the gas to the nozzle A compressed air source, a liquid supply source for supplying a liquid to the nozzle, and a switch for switching off the supply of the gas from the compressed air source to the nozzle. A change-over switch fixed to the insertion direction proximal end side of the nozzle, and the observation lens is provided on the distal end surface of the adapter when the adapter is attached, When the adapter is not attached, the insertion portion is provided on the distal end surface of the insertion portion, and the distal end side of the nozzle has a shape that is flattened and deformed without blocking the flow path. And has a shape deformed by being folded so as to close the flow path of the nozzle in front of the observation lens in the insertion direction, and rearward in the insertion direction than the folding portion of the nozzle. In addition, an ejection port for supplying the liquid together with the gas to the observation lens is formed at a position ahead of the observation lens in the insertion direction.
An endoscope according to another aspect of the present invention is an endoscope including an elongated insertion portion and an operation portion located behind the insertion portion in the insertion direction, wherein the insertion of the insertion portion is performed. When the adapter is attached to the distal end in the direction, the insertion portion is detachable with respect to either the outer periphery on the distal end side in the insertion direction or the outer periphery of the adapter, and the distal end of the insertion portion When the adapter is not attached, a multi-lumen tube that is detachable on the outer periphery on the distal end side in the insertion direction of the insertion part, and the insertion part when the adapter formed on the multi-lumen tube is attached And at least one of the adapter is inserted, and when the adapter is not mounted, the insertion portion is inserted, a first hole formed along the insertion direction, and formed in the multi-lumen tube The second hole formed along the insertion direction other than the first hole, and the second hole positioned along the insertion direction on the outer periphery of the insertion portion in the insertion direction. When the adapter is mounted, the distal end side being fixed to the multi-lumen tube by being inserted through the distal end side, provided at the distal end side in the insertion direction of the adapter, and when the adapter is not mounted Is a nozzle that ejects liquid together with gas from the tip in the insertion direction to the observation lens provided on the tip side of the insertion portion, and the tip has a deformed shape different from other parts, and gas to the nozzle A compressed air source for supplying liquid, a liquid supply source for supplying liquid to the nozzle, and a supply cutoff of the gas from the compressed air source to the nozzle provided in the operation unit are switched. , Anda change-over switch which is fixed to the insertion direction proximal end side of the nozzle, uneven portion to portion to be inserted into the second hole of the nozzle is formed.
Furthermore, an endoscope according to another aspect of the present invention is an endoscope that includes an elongated insertion portion and an operation portion positioned behind the insertion portion in the insertion direction, wherein the insertion of the insertion portion is performed. When the adapter is attached to the distal end in the direction, the insertion portion is detachable with respect to either the outer periphery on the distal end side in the insertion direction or the outer periphery of the adapter, and the distal end of the insertion portion When the adapter is not attached, a multi-lumen tube that is detachable on the outer periphery on the distal end side in the insertion direction of the insertion part, and the insertion part when the adapter formed on the multi-lumen tube is attached And at least one of the adapter is inserted, and when the adapter is not attached, the insertion portion is inserted, and a first hole formed along the insertion direction is formed in the multi-lumen tube. The second hole formed along the insertion direction other than the first hole, and the second hole positioned along the insertion direction on the outer periphery of the insertion portion in the insertion direction. When the adapter is mounted, the distal end side being fixed to the multi-lumen tube by being inserted through the distal end side, provided at the distal end side in the insertion direction of the adapter, and when the adapter is not mounted Is a nozzle that ejects liquid together with gas from the tip in the insertion direction to the observation lens provided on the tip side of the insertion portion, and the tip has a deformed shape different from other parts, and gas to the nozzle A compressed air source for supplying the liquid, a liquid supply source for supplying a liquid to the nozzle, and a supply interruption of the gas from the compressed air source to the nozzle provided in the operation unit. A change-over switch fixed to the insertion direction base end side of the nozzle, one end fixed to the multi-lumen tube, and the other end fixed to a coil covering the outer periphery of the insertion portion on the distal end side. The wire is further provided.

  ADVANTAGE OF THE INVENTION According to this invention, the endoscope which has the structure which can replace | exchange easily the nozzle which supplies a fluid to an observation lens and removes the stain | pollution | contamination of an observation lens can be provided.

The perspective view which shows the outline of a structure of the endoscope which shows this Embodiment. The block diagram which shows the outline of a structure of the endoscope of FIG. Partial perspective view schematically showing a state where the multi-lumen tube is fixed to the outer periphery of the side-view type endoscope The fragmentary perspective view which shows the shape of the modification of the front end side of the nozzle fixed to the multi-lumen tube of FIG. Partial perspective view schematically showing a state in which the multi-lumen tube is fixed to the outer periphery of the direct-view endoscope Partial sectional view of the tip side of the nozzle fixed to the multi-lumen tube of FIG. 6 is a view of the tip side of the nozzle in FIG. 6 as viewed from the VI direction in FIG. The perspective view which shows the modification of the switch fixing plate of FIG. The partial perspective view which shows a mode that a nozzle is inserted and fixed to the multi-lumen tube of FIG. The figure which shows the modification of the shape of the front end side of the nozzle of FIG. The perspective view which shows the modification which fixed the wire for slipping prevention to the tube of FIG. The partial perspective view which shows the structure of the modification which fixes a nozzle with respect to the outer periphery of the insertion body different from this Embodiment. The fragmentary perspective view which shows the structure of the modification which fixes a nozzle with respect to the outer periphery of the insertion body different from this Embodiment or FIG. The block diagram which shows the outline of the structure which supplies fluorescent solution and developing solution other than water with gas to a test part The block diagram which shows the outline of a structure of the modification in which the liquid supply source was comprised from the pump and pump control part which supply a liquid automatically. The fragmentary perspective view which shows the structure of the modification which fixes a nozzle with respect to the outer periphery of this embodiment and the insertion body different from FIG. 12, FIG. The partial perspective view which shows the structure of the modification which fixes a nozzle with respect to the outer periphery of this embodiment and the insertion body different from FIG.12, FIG.13, FIG.16.

 Embodiments of the present invention will be described below with reference to the drawings. In the embodiment described below, the endoscope will be described by taking an endoscope in which the adapter is detachable at the distal end in the insertion direction of the insertion portion as an example.

  1 is a perspective view showing an outline of the configuration of an endoscope showing the present embodiment, FIG. 2 is a block diagram showing an outline of the configuration of the endoscope of FIG. 1, and FIG. 3 is a side-view type endoscope. FIG. 4 is a partial perspective view schematically showing a state in which the multi-lumen tube is fixed to the outer periphery of the mirror, and FIG. 4 is a partial perspective view showing the shape of a modified example on the tip side of the nozzle fixed to the multi-lumen tube in FIG. .

  5 is a partial perspective view schematically showing a state in which the multi-lumen tube is fixed to the outer periphery of the direct-view endoscope, and FIG. 6 is a portion on the tip side of the nozzle fixed to the multi-lumen tube in FIG. FIG. 7 is a cross-sectional view of the nozzle tip of FIG. 6 as viewed from the VI direction in FIG.

  8 is a perspective view showing a modification of the switch fixing plate of FIG. 1, and FIG. 9 is a partial perspective view showing a state in which a nozzle is inserted and fixed to the multi-lumen tube of FIG. These are the fragmentary perspective views which show the state before a nozzle is inserted in a multi-lumen tube, (b) is a fragmentary perspective view which shows the state after a nozzle is inserted in a multi-lumen tube.

  As shown in FIG. 1, the endoscope 1 includes an elongated insertion portion 2 and an operation portion 3 that is located behind the insertion portion 2 in the insertion direction S (hereinafter simply referred to as “rear”). .

  The insertion portion 2 includes a distal end portion 2s provided on the distal end side in the insertion direction S (hereinafter simply referred to as a distal end side) and a proximal end side in the insertion direction S of the distal end portion 2s (hereinafter simply referred to as a proximal end side). ) And the flexible tube portion 2q provided on the proximal end side of the bending portion 2w constitutes a main portion. A known optical adapter 21 is attached to the tip of the tip 2s. The optical adapter 21 is detachable with respect to the distal end of the distal end portion 2s.

  On the upper surface of the operation unit 3, there is provided a bending operation lever 4 that gives an instruction to bend the bending portion 2w in, for example, four directions, up, down, left, and right.

  Further, a joint 15 shown in FIG. 2 having a changeover switch 7 is fixed to a side surface of the operation unit 3 via a switch fixing plate 5 bent in a crank shape.

  Specifically, the bottom side of the switch fixing plate 5 is fixed to the side surface of the operation unit 3 by being fixed to the block 6 fixed to the side surface of the operation unit 3 with a screw or the like. The upper side of the plate 5 is fixed to the joint 15 with screws or the like. As a result, the joint 15 is fixed to the side surface of the operation unit 3 via the switch fixing plate 5. The joint 15 may be directly fixed to the side surface of the operation unit 3.

  Further, as shown in the switch fixing plate 105 in FIG. 8, the switch fixing plate 5 is formed with a space 105 s into which the grip portion of the operation unit 3 is inserted and a claw portion 105 t 1 that is locked to the grip portion on the upper side. The top side is bent a plurality of times so that the bottom portion is bent to form a claw portion 105t2 that is fitted and locked in the gap on the bottom side of the block 6, and the switch fixing plate 105 is bent. The joint 15 may be configured to be fixed to a surface opposite to the surface facing the operation portion.

  The switch fixing plate 105 having such a shape covers the grip portion on the upper side so that the grip portion of the operation portion 3 is inserted into the space 105s, and the claw portion 105t1 is locked to the grip portion, so that the bottom side The claw portion 105t2 is fixed to the block 6 with a screw or the like in a state in which the claw portion 105t2 is fitted and locked in the gap on the bottom side of the block 6. Therefore, the switch fixing plate 105 having such a configuration is more firmly fixed to the operation unit 3 than the switch fixing plate 5 of the present embodiment shown in FIG.

  Returning to FIG. 1, connectors 13, 14, and 16 are provided on the joint 15 fixed to the switch fixing plate 5. A compressed air source 12 is connected to the connector 13 via the tube 11, a proximal end of a nozzle 10 to be described later is connected to the connector 14, and a liquid is supplied to the connector 16 via the tube 18. A supply source 9 is connected.

  The compressed air source 12 supplies the gas A to the nozzle 10 via the tube 11, the connector 13, the coupling 15, and the connector 14, as shown in FIG. As shown in FIGS. 1 and 2, the joint 15 includes a changeover switch 7 that switches the supply and interruption of the gas A from the compressed air source 12 to the nozzle 10.

  Therefore, when the changeover switch 7 is on, the gas A is supplied from the compressed air source 12 through the tube 11, the connector 13, the joint 15, and the connector 14, and when the changeover switch 7 is off, the nozzle 10 Is configured such that the gas A is not supplied from the compressed air source 12.

  A check valve 17 is interposed in the middle of the tube 18. In the check valve 17, the gas A supplied from the compressed air source 12 to the nozzle 10 is supplied to the liquid supply source 9 via the connector 16 and the tube 18, and the connection of the liquid supply source 9 to the tube 18 is disconnected. It has a function to prevent it. That is, in the tube 18, the fluid flows only in the direction from the liquid supply source 9 to the connector 16 by the check valve 17.

  As shown in FIGS. 1 and 2, the liquid supply source 9 is composed of, for example, a manual syringe pump, and is fixed to a syringe fixing plate 8 fixed to the grip portion of the operation unit 3 as shown in FIG. 1. Has been. The liquid supply source 9 supplies the liquid W in the syringe to the nozzle 10 via the tube 18, the connector 16, the joint 15, and the connector 14. The liquid supply source 9 may be configured by a manual pump other than the syringe pump.

As shown in FIG. 1, when the adapter 21 is mounted on the tip 2 s, a flexible and poorly slippery member such as silicon or urethane is formed on at least one outer periphery of the adapter 21 and the tip 2 s. The formed multi-lumen tube (hereinafter simply referred to as a tube) 20 is covered (FIG. 1 shows the tube 20 covered only on the outer periphery of the adapter 21). The tube 20 is detachable from the outer periphery of the adapter 21 or the outer periphery of the adapter 21 and the distal end portion 2s.
In the case of the endoscope in which the adapter 21 is attached to the distal end portion 2s, the attachment position of the tube 20 is not the adapter 21 side but the distal end side of the insertion portion 2 (base end side of the adapter 21). Since the adapter 21 can be easily replaced with the tube 21 attached, the distal end side of the insertion portion 2 (base end side of the adapter 21) is set as the attachment position in the endoscope having the adapter 21. Is preferred.
When the adapter 21 is not attached, the tube 20 is naturally attached at the distal end side of the insertion portion 2.

  Specifically, as shown in FIG. 3, a side-view type adapter 21 s in which an illumination lens 22 and an observation lens 23 are provided on a part of the outer peripheral surface part at the distal end of the distal end part 2 s of the insertion part 2 is provided. When attached, the tube 20 is covered over the outer periphery of the adapter 21 and the outer periphery of the distal end portion 2s, while the distal end of the distal end portion 2s of the insertion portion 2 is connected to the distal end as shown in FIG. When the direct-view adapter 21 c having the observation lens 24 on the surface is attached, the tube 20 is covered on the outer periphery of the adapter 21.

  In other words, in this Embodiment, the tube 20 is formed in the length which covers at least adapter 21s, 21c or adapter 21s and the front-end | tip part 2s.

  As shown in FIG. 2, the adapter 20, or the adapter 21 and the tip 2 s (hereinafter collectively referred to as an insert) are inserted into the tube 20, so that the first diameter slightly smaller than the outer diameter of the insert The hole 20h1 and a plurality of second holes 20h2 other than the first hole 20h1 are formed so as to penetrate back and forth along the insertion direction S.

  By expanding the hole 20h1 of the tube 20 and inserting the insert through the hole 20h1, the tube 20 is fixed to the insert. It should be noted that the tube 20 has the first hole 20h1 because the hole 20h1 is formed to be slightly smaller in diameter than the insert, or because the tube 20 is formed of a member having poor slip properties such as silicon or urethane. It is prevented by non-adhesive that it slides down from the insertion body inserted in the. That is, the tube 20 is fixed to the insert inserted through the hole 20h1 in a non-adhesive manner.

  Moreover, as shown in FIGS. 2 to 5 and FIGS. 9A and 9B, one hole 20h2 is located along the outer periphery of the insertion portion 2 of the endoscope 1 among the plurality of holes 20h2. For example, the tip side of the nozzle 10 formed of, for example, Teflon (registered trademark) or PTFE is inserted and fixed. That is, the nozzle 10 can be attached to and detached from the tube 20 because the tip end side of the nozzle 10 can be inserted into and removed from the hole 20 h 2.

  The tip side of the nozzle 10, particularly the portion inserted through the hole 20 h 2, has a shape that is flattened and deformed in accordance with the shape of the hole 20 h 2 without blocking the internal flow path.

  The tip side of the nozzle 10 is fixed to the hole h <b> 2 of the tube 20 in a non-adhering manner because the tube 20 is formed of a member having poor slip properties such as silicon or urethane. That is, the front end side of the nozzle 10 can be inserted into and removed from the hole 20 h 2 so that the front end side of the nozzle 10 can be attached to and detached from the tube 20.

  Note that, as shown in FIGS. 9A and 9B, irregularities due to a plurality of wrinkles formed by crushing the portion inserted into the hole 20 h 2 of the nozzle 10 without blocking the flow path, or protrusions provided separately. If the portion 10p is formed, the tip side of the nozzle 10 can be more firmly fixed to the hole 20h2 by the uneven portion 10p.

  In the nozzle 10, the liquid W is supplied from the liquid supply source 9 to the proximal end side of the nozzle 10 via the tube 18, the connector 16, the joint 15, and the connector 14, the changeover switch 7 is turned on, and the compressed air source 12 supplies the tube. 11, when the gas A is supplied through the connector 13, the joint 15, and the connector 14, the observation lens 24 of the direct-view adapter 21c as shown in FIG. 5 or the side-view adapter 21s as shown in FIG. By spraying the liquid W together with the gas A onto the observation lens 23 in the form of a mist, dirt on the lenses 23 and 24 is removed, and then only the gas A is sprayed to blow off the moisture on the lens surface. is there. The mist state can be changed by changing the amount of the liquid W supplied from the liquid supply source 9. In other words, when a large amount of liquid W is supplied, the lens surface is first sprayed to remove dirt and gradually become mist, and finally the water can be blown off with the gas A. can do.

  On the other hand, as shown in FIG. 3, when the side-view type adapter 21 s is attached to the distal end of the distal end portion 2 s of the insertion portion 2, the distal end of the nozzle 10 is inserted in the insertion direction more than the observation lens 23. It is located behind S (hereinafter simply referred to as the rear).

  Further, as described above, the tip side of the nozzle 10 has a flattened and deformed shape, that is, since the flow path is narrowed, the nozzle 10 is directed toward the observation lens 23. The observation lens 23 cannot be removed by the single supply of the gas A or the liquid W. The liquid W (hereinafter referred to as a fluid) is supplied together with the gas A through the opening at the tip thereof. It is the structure which can also remove easily the filth adhering to.

  In the configuration in which the fluid is supplied to the observation lens 23 of the side-view type adapter 21s, the flow path is narrowed at the tip side of the nozzle 10 so that the flow path diameter is smaller than other parts as shown in FIG. It may be formed in a given shape.

  On the other hand, as shown in FIG. 5, when the direct-view adapter 21c is attached to the distal end of the distal end portion 2s of the insertion portion 2, the nozzle 10 inserted through the hole 20h2 protrudes from the distal end of the hole 20h2. The tip of the nozzle 10 is positioned in front of the observation lens 24.

  Further, as described above, the tip side of the nozzle 10 has a flattened and deformed shape, but the direct-view adapter 21c is attached to the tip of the tip 2s shown in FIG. As shown in FIG. 6, the tip side portion of the nozzle 10 deformed in front of the observation lens 24 was further deformed by being crushed and folded so as to close the internal flow path 10r. It has a shape.

  That is, a folded portion 10t is formed at the tip of the nozzle 10, and the tip of the flow path 10r is blocked by the folded portion 10t. In other words, the tip end of the flow path 10r is easily blocked by non-adhesion simply by crushing and folding the tip end side of the nozzle 10.

  Moreover, as shown in FIG. 7, the overhang | projection part 10b which spreads to the outer side of radial direction R is formed in the folding site | part 10t when the nozzle 10 is crushed and folded. The overhang portion 10b is unexpectedly pulled out rearward from the hole 20h2 by being locked to the distal end surface 20z (see FIG. 2) of the tube 20 in a state where the nozzle 10 is inserted into the hole 20h2. It has a function to prevent this.

  As shown in FIGS. 6, 7, and 9, on the tip side of the nozzle 10, the injection port 10 k that communicates with the flow path 10 r is located behind the folding portion 10 t and ahead of the observation lens 24. Is formed.

  The injection port 10k is supplied with the liquid W from the liquid supply source 9 to the proximal end side of the nozzle 10 via the tube 18, the connector 16, the joint 15, and the connector 14, the switch 7 is turned on, and the compressed air source 12 When the gas A is supplied via the tube 11, the connector 13, the joint 15, and the connector 14, the fluid 10 is directed toward the observation lens 24 because the tip of the flow path 10 r is blocked by the folded portion 10 t. It sprays in the form of a mist.

  Even when the side-view type adapter 21s as shown in FIG. 3 is attached to the tip of the tip 2s, the direct-view type adapter 21c is attached as shown in FIG. In either case, the nozzle 10 is formed from a common member. That is, if the folding part 10t is formed on the tip side, it is for the direct-view adapter 21c, and if the folding part 10t is not formed, it is for the side-view adapter 21s.

  Thus, in the present embodiment, the insertion body can be inserted into the hole 20h1, so that the tube 20 can be attached to and detached from the outer periphery of the insertion body, and the distal end side is deformed into the hole 20h2 of the tube 20. It has been shown that the nozzle 10 can be attached to and detached from the tube 20 because the nozzle 10 having a shape can be inserted and removed.

  According to this, even if the flow path 10r of the nozzle 10 is clogged due to dirt or the like and the nozzle 10 is replaced, the tip side of the nozzle 10 clogged with the flow path 10r from the hole 20h2 of the tube 20 is removed. Since the nozzle 10 can be replaced simply by removing and inserting the tip of the new nozzle 10 into the hole 20h2 again, the nozzle 10 can be easily replaced.

  Even when the observation lens 24 of the direct-view adapter 21c is washed, the observation lens 24 can be easily and non-adhered simply by forming the folded portion 10t on the tip side of the nozzle 10 and forming the injection port 10k. 24 cleaning nozzles can be created.

  As described above, it is possible to provide the endoscope 1 having a configuration in which the nozzle for supplying the fluid to the observation lens and removing the dirt on the observation lens can be easily replaced.

  Hereinafter, a modification will be described with reference to FIG. FIG. 10 is a diagram showing a modification of the shape of the tip of the nozzle of FIG. 1, and (a) is a guide tube with a nozzle hole inserted into the second hole of the guide tube, and a guide with an injection hole at the tip. The figure which shows the state which block | closed the 1st hole of the tube, (b) inserts an endoscope in the 1st hole of the guide tube of (a), and endoscopes from the front-end | tip opening of a 1st hole The figure which shows the state which started the adapter by projecting the adapter forward, and (c) shows the state in which the adapter projects forward from (b), completely opens the lid, and with the gas from the hole in the lid The figure which shows the state which injected the liquid to the observation lens, (d) is a figure which shows only the front end side of the nozzle of (a)-(c).

  In the present embodiment, the tube 20 in which the insertion body is inserted into the hole 20h1 and the distal end side of the nozzle 10 is inserted into the hole 20h2 is formed to have a length that covers at least the adapter 21s, 21c or the adapter 21s and the distal end portion 2s. However, it may be formed in a length that covers the entire adapter 21 and the insertion portion 2 along the insertion direction S.

  Specifically, as shown in FIG. 10, the adapter 21 and the insertion portion 2 are configured to be long enough to cover the entire insertion portion 2 and include a multi-lumen tube having a plurality of through holes along the insertion direction S. The formed guide tube 30 may be used.

  More specifically, as shown in FIGS. 10B and 10C, the guide tube 30 includes a first hole 30h1 formed along the insertion direction S through which the adapter 21 and the insertion portion 2 are inserted. And a second hole 30h2 formed along the insertion direction S other than the hole 30h1 and through which the nozzle 10 'is inserted. In FIG. 10, an adapter 21c is shown as an example of the adapter 21 attached to the distal end portion 2s.

  Similarly to the nozzle 10 described above, the nozzle 10 ′ supplies fluid to the observation lens 24 from the distal end side, and as shown in FIG. 10D, the lid 10 having an ejection port 10′k at the distal end. 'm is formed. The injection port 10'k communicates with the flow path inside the nozzle 10 '.

  The lid 10'm protrudes from the tip opening of the hole 30h2 when the nozzle 10 'is inserted into the hole 30h2 from the base end side. At this time, as shown in FIG. 10A, the lid 10'm closes the tip opening of the hole 30h1. The lid 10'm may be formed integrally with the nozzle 10 ', or may be separately attached to the tip of the nozzle 10'.

  Further, as shown in FIGS. 10B and 10C, the lid 10′m is configured to be opened from the tip opening of the hole 30h1 when the adapter 21c protrudes from the tip opening of the hole 30h1. In the fully opened state as shown in FIG. 10C, the injection port 10′k is positioned in front of the observation lens 24.

  Therefore, the fluid can be supplied to the observation lens 24 in the state shown in FIG.

  Even with such a configuration, the same effect as in the present embodiment can be obtained. The nozzle 10 'shown in FIG. 10 can be inserted into the hole 20h2 of the tube 20 shown in the present embodiment. Moreover, the structure shown in FIG. 10 is applicable also to the structure by which the side view type adapter 21s was mounted | worn at the front-end | tip of the front-end | tip part 2s.

  Hereinafter, another modification will be described with reference to FIG. FIG. 11 is a perspective view showing a modified example in which a slip-preventing wire is fixed to the tube of FIG. 1, and (a) is a diagram showing a state in which the distal end side of the wire is fixed to the tube. (A) is a figure which shows the state which fixed the base end side of the wire to the coil from the state of (a).

  As shown in FIG. 11 (a), in the plurality of holes 20h2 formed in the tube 20, two holes other than the hole through which the tip side of the nozzle 10 is inserted are used, and one of the holes is After allowing the wire 35 to enter the hole and projecting the wire 35 from the tip side, the wire 35 is allowed to enter the other hole from the tip side of the other hole, as shown in FIG. The wire 35 is protruded from the proximal end side, and the protruding portion of the wire 35 is fixed to the midway position of the wire by the caulking portion 36, thereby fixing the distal end of the wire 35 to the tube 20. The end side is fixed by a caulking portion 37 to a coil 38 that covers the outer periphery of the insertion portion 2 and is fixed by an elastic force. Thus, the endoscope 1 may have a configuration that prevents the tube 20 from sliding off the insert by the wire 35 and the coil 38.

  As is well known, the coil 38 is formed so that the inner space is smaller than the diameter of the insertion portion 2, so that the inner space is widened by twisting in one direction to cover the outer periphery of the insertion portion 2. Thus, the coil 38 is fixed to the insertion portion 2 by an elastic force by utilizing the fact that the coil 38 rotates in the opposite direction opposite to the twisted direction.

  According to such a configuration, it is possible to more reliably prevent the insert from coming out of the hole 20h1 of the tube 20 than in the present embodiment. Other effects are the same as those of the present embodiment described above.

  Furthermore, another modification will be described below with reference to FIG. FIG. 12 is a partial perspective view showing a configuration of a modified example in which the nozzle is fixed to the outer periphery of the insert different from the present embodiment.

  In the configuration in which the direct-view adapter 21c is fixed to the distal end of the distal end portion 2s of the insertion portion 2, when the nozzle for supplying the fluid to the observation lens 24 is fixed to the outer periphery of the insertion body, it is fixed by the configuration shown in FIG. It doesn't matter.

  Specifically, as shown in FIG. 12, the front end side of the nozzle 45 having the same function as that of the nozzle 10 of the present embodiment is provided with an opening 45v of the flow path at the front end while securing the internal flow path. The nozzle 45 is crushed flat so as to have an ejection port 45k that supplies fluid to the observation lens 24 on the tip side of the flat crushed nozzle 45.

  Further, the opening 45v is fitted with a U-shaped tip portion of the key portion 41 extending forward from the base 40. The nozzle 45 is inserted in a loosely fitted state in the space 40h in the base 40, and an insert is inserted therethrough.

  As a result, the opening 45v is blocked by the tip of the key portion 41. The insert inserted into the space 40h is fixed to the base 40 because the base 40 is formed of a material that is difficult to slide.

  Therefore, the fluid flowing in the flow path of the nozzle 45 is inserted into the space 40h of the base 40 from the injection port 45k and is injected toward the observation lens 24 of the insert.

  Even with such a configuration, the nozzle 45 can be easily replaced simply by removing the tip of the key portion 41 from the opening 45v and pulling out the nozzle 45 from the space 40h.

  Hereinafter, another modification will be described with reference to FIG. FIG. 13 is a partial perspective view showing a configuration of a modified example in which the nozzle is fixed to the outer periphery of the insert different from the present embodiment and FIG. 12, and (a) is covered on the outer periphery of the insert. The partial perspective view which shows the nozzle fixed to the cap and the outer peripheral surface of this cap, (b) is a partial perspective view which shows the state which coat | covered the cap of (a) on the outer periphery of an insertion body.

  In the configuration in which the direct-view adapter 21c is fixed to the distal end of the distal end portion 2s of the insertion portion 2, it has a flat shape over the entire length along the insertion direction S, as shown in FIG. As shown in FIG. 13B, the insertion portion 2 is inserted into the space 50h of the cap 50 made of a non-slip material with the nozzle 55 bent inward in the radial direction R fixed to the outer peripheral surface. Then, by fixing the cap 50 to the outer periphery of the insert so that the tip of the nozzle 55 is positioned in front of the observation lens 24, the nozzle 55 having the same function as the nozzle 10 described above is fixed to the outer periphery of the insert. You may be the structure to do.

  Therefore, the gas A and the liquid W flowing in the flow path of the nozzle 55 are ejected from the bent tip of the nozzle 55 toward the adapter 21c inserted into the space 50h of the cap 50 or the observation lens 24 of the insertion portion 2. Is done.

  Even with such a configuration, the nozzle 55 can be easily replaced simply by removing the cap 50 from the outer periphery of the insertion portion 2.

  Hereinafter, another modification will be described with reference to FIG. FIG. 14 is a block diagram showing an outline of a configuration for supplying a fluorescent solution and a developer in addition to water to a test site.

  In the present embodiment, there is one type of liquid W supplied from the tip of the nozzle 10 to the test site, but the endoscope may be configured to supply a plurality of types of liquid. good. Hereinafter, a configuration for supplying a plurality of types of liquids from the nozzles will be described with reference to FIG. In the following description, the same components as those in FIG.

  As shown in FIG. 14, the valve body 60 is connected to the connector 16 of the joint 15 via the tube 18, and the syringe containing water is connected to the connector 60 a of the valve body 60 via the tube 57. 64, a syringe 65 containing a fluorescent solution is connected to the connector 60b of the valve body 60 via a tube 58, and a developer solution is supplied to the connector 60c of the valve body 60 via a tube 59. A syringe 66 is connected.

  In addition, check valves 61 to 63 having functions similar to those of the check valve 17 described above are interposed in the middle positions of the tubes 57 to 59, respectively.

  According to such a configuration, the fluorescent solution is supplied to the test site, the fluorescent solution is permeated into the wound of the test site, the cleaning solution is supplied to the test site, and the fluorescence penetrated into the wound site. In the case of performing known fluorescence observation by irradiating the test site with ultraviolet rays in the dark place by removing the liquid other than the solution and further supplying the developer to the test site, The fluorescent liquid is supplied into the nozzle 10 from 65, and the gas A is supplied from the compressed air source 12 to the nozzle 10, whereby the fluorescent liquid is supplied from the nozzle 10 to the wound at the site to be examined. Then, when removing other than the fluorescent solution that has penetrated into the wound, water is supplied from the syringe 64 into the nozzle 10, and the gas A is supplied from the compressed air source 12 to the nozzle 10. Finally, in order to raise the fluorescent solution that has penetrated into the scratch, when supplying the developer, the developer is supplied from the syringe 66 into the nozzle 10 and the gas A is supplied from the compressed air source 12 to the nozzle 10. As a result, three endoscopes, water, a fluorescent solution, and a developer, can be supplied to a region to be examined by one endoscope, and fluorescence observation can be performed.

  Thus, the endoscope may have a configuration that can supply a plurality of types of liquid from the nozzle 10. In FIG. 14, the configuration in which the fluorescent solution and the developer are supplied from the nozzle 10 in order to perform fluorescence observation is shown. However, the present invention may be applied to a configuration in which other types of liquids are supplied from the nozzle 10. Of course.

  Further, in FIG. 14, the configuration in which the direct-view adapter 21c is attached to the tip of the tip portion 2s is shown as an example, but it can be applied to the configuration in which the side-view adapter 21s is attached. Of course.

  Hereinafter, another modification will be described with reference to FIG. FIG. 15 is a block diagram showing an outline of a configuration of a modified example in which the liquid supply source includes a pump that automatically supplies liquid and a pump control unit.

  In the present embodiment described above, the liquid supply source 9 is described as being configured from a manual syringe pump or a pump other than the manual syringe pump, but may be configured from an automatic pump. Hereinafter, the configuration of the automatic pump will be described with reference to FIG. In the following description, the same components as those in FIG.

  As shown in FIG. 15, a pump 70 such as a rotary pump is connected to the connector 16 of the joint 15 via a tube 73, and water is injected into the pump 70 via a tube 71. A tank 72 is connected, and a pump control unit 74 having a switch 77 for controlling the operation of the pump 70 is connected.

According to such a configuration, while the switch 77 is on, the pump 70 is driven by the drive control of the pump controller 74, and the water in the tank 72 is supplied to the tubes 71 and 73, the connector 16, and the joint 15. Since the water can be supplied to the nozzle 10 via the connector 14, water can be automatically supplied from the nozzle 10 to the observation lens 24 together with the gas A supplied from the compressed air source 12 when the switch 7 is turned on. it can.
Alternatively, by turning on the switch 77 and controlling the pump 70 to be driven for a certain period of time, water can be quantitatively injected from the pump 70.

  In FIG. 15, the configuration in which the direct-view adapter 21c is attached to the distal end of the distal end portion 2s is described as an example. However, the configuration can also be applied to a configuration in which the side-view adapter 21s is attached. Of course.

  Hereinafter, another modification will be described with reference to FIG. FIG. 16 is a partial perspective view showing a configuration of a modified example in which the nozzle is fixed to the outer periphery of the insert different from the present embodiment and FIGS. 12 and 13, and FIG. The perspective view which shows the cap and coil to which the nozzle to be covered is fixed together with the outer tube, (b) is a cross-sectional view of the tip side of the nozzle and cap of (a).

  As shown in FIG. 16A, when the insert is inserted into the space 82h, the distal end portion shown in FIG. 11 described above is formed on the base end side of the cap 82 that covers the outer periphery of the insert. A coil 38 covering the outer periphery of 2s is connected. In addition, the cap 82 of this structure does not need to be formed from a non-slip material such as silicon in order to prevent the insertion body inserted through the space 82h from coming off. This is because the cap 82 is fixed to the outer periphery of the insert through the coil 38.

  Two notches 82t1 and 82t2 communicating with the internal space 82h are formed on a part of the outer peripheral surface of the cap 82. The notch 82t2 is located in front of the notch 82t1.

  In the nozzle 10 described above, as shown in FIG. 16B, from the base end side, first, the tip end side of the nozzle 10 enters the space 82h through the notch 82t1, and then the front notch 82t2 is moved. After projecting out of the space 82h and forming the folded portion 10t as described above, the portion on the tip side from the folded portion 10t is again entered into the space 82h through the notch 82t2, and then rearward It is fixed to the cap 82 by projecting out of the space 82h through the notch 82t1.

  In this fixed position, the tip of the nozzle 10 is located so as to protrude forward from the tip of the cap 82, and fluid is supplied from the ejection port 10 k to the lens 24 of the insert inserted through the cap 82.

  The nozzle 10 enters the notches 82t1 and 82t2 after the insert is inserted into the space 82h. This is because if the nozzle 10 enters the notches 82t1 and 82t2 first, the nozzle 10 may be pushed and entangled after the insertion of the insert into the space 82h.

  In addition, after fixing the nozzle 10, the outer tube 80 covered with the insertion portion 2 is covered until the distal end of the outer tube 80 is located on the outer periphery on the proximal end side of the cap 82. That is, the interior behind the cap 82 is hidden by the outer tube 80. The outer tube 80 is preferably formed of a flexible material so as not to hinder the bending of the bending portion 2w.

  According to such a configuration, the nozzle 10 can be easily replaced simply by removing the cap 82 and the coil 38 from the adapter 21c or the tip 2s and extracting the nozzle 10 from the notches 82t1 and 82t2 of the cap 82. Can do.

  In FIG. 16, the case where the direct-view type adapter 21c is inserted into the space 82h of the cap 82 is shown as an example, but this configuration is applied when the side-view type adapter 21s is inserted. It doesn't matter. In this case, the nozzle 10 shown in FIG. 3 in which the front end side of the nozzle 10 is flattened is inserted and fixed in the notches 82t1 and 82t2 of the cap 82.

  Hereinafter, another modification will be described with reference to FIG. FIG. 17 is a partial perspective view showing a configuration of a modified example in which the nozzle is fixed to the outer periphery of the insert different from the present embodiment and FIGS. 12, 13 and 16.

  As shown in FIG. 17, a distal end cap 93 can be attached to the outer periphery of the insertion body by inserting the insertion body through an internal space 93 h, and an insertion portion is provided on the proximal end side of the distal end base 93. The outer tube 90 covered with the outer periphery of the outer tube 90 is fixed by a bobbin adhering portion 95.

  The outer tube 90 is made of a soft material, specifically, a foamed fluorine tube, a urethane tube, a silicon tube, or the like so as not to disturb the bending of the bending portion 2w.

  An inner tube 92 that covers the outer periphery of the insertion portion 2 that is inserted into the inner space 92 h and that is formed of, for example, Teflon (registered trademark), PTFE, or the like is inserted into the inner space 90 h of the outer tube 90. The inner tube 92 is inserted into the internal space 90 h so that the tip is located in the middle of the insertion direction S of the outer tube 90.

  Further, the nozzle 10 is inserted into a space 90 h formed between the inner tube 92 and the outer tube 90 in a region where the outer tube 90 is covered on the outer periphery of the insertion portion 2, and only the outer tube 90 is covered. In the region that is formed, it is inserted into a space 90 h formed between the insertion portion 2 and the outer tube 90, and the tip is positioned so as to protrude forward from the tip of the tip cap 93. The nozzle 10 ejects fluid from the ejection port 10k toward the observation lens 24 of the adapter 21c held by the tip cap 93.

  The nozzle 10 is fixed to the outer periphery of the tip base 93 together with the distal end side of the outer tube 90 by a bobbin adhering portion 95 at the distal end side.

  According to such a configuration, it is possible to easily replace the nozzle 10 simply by removing the bobbin adhering portion 95 and pulling out the nozzle 10 from the space 90 h in the outer tube 90.

  1 to 17, the endoscope in which the adapter 21 is detachable at the distal end of the distal end portion 2s of the insertion portion 2 has been described as an example. However, the present invention is not limited thereto, and the adapter 21 is not limited thereto. Of course, the configuration shown in FIGS. 1 to 17 can be applied even if is not attached. That is, in this case, the insertion body is configured only from the distal end side of the insertion portion 2.

DESCRIPTION OF SYMBOLS 1 ... Endoscope 2 ... Insertion part 3 ... Operation part 7 ... Changeover switch 9 ... Liquid supply source 10 ... Nozzle 10b ... Overhang part 10k ... Injection port 10p ... Uneven part 10t ... Folding part 11 ... Tube 12 ... Compressed air source 17 ... Check valve 18 ... Tube 20 ... Multi-lumen tube 20h1 ... First hole 20h2 ... Second hole 20z ... Tube end surface 21 ... Adapter 21c ... Direct-view adapter 21s ... Side-view adapter 23 ... Observation lens 24 ... Observation lens 35 ... wire 38 ... coil A ... gas R ... radial direction S ... insertion direction W ... liquid

Claims (10)

An endoscope comprising an elongated insertion portion and an operation portion located behind the insertion portion in the insertion direction,
When an adapter is attached to the distal end of the insertion portion in the insertion direction, the insertion portion is detachable with respect to either the outer periphery of the insertion portion in the insertion direction or the outer periphery of the adapter. When the adapter is not attached to the tip of the part, a multi-lumen tube that is detachable on the outer periphery on the tip side in the insertion direction of the insertion part,
Formed in the multi-lumen tube, when the adapter is attached, at least one of the insertion portion and the adapter is inserted; when the adapter is not attached, the insertion portion is inserted; A first hole formed along the insertion direction;
A second hole formed in the insertion direction other than the first hole formed in the multi-lumen tube;
The adapter having the distal end side fixed to the multi-lumen tube by inserting the distal end side in the insertion direction through the second hole located along the insertion direction on the outer periphery of the insertion portion is mounted. If the adapter is not attached, the adapter is attached to the observation lens provided on the distal end side of the insertion portion together with the gas from the distal end in the insertion direction. A nozzle for ejecting liquid, the tip having a deformed shape different from other parts;
A compressed air source for supplying gas to the nozzle;
A liquid supply source for supplying liquid to the nozzle;
A change-over switch fixed on the base end side in the insertion direction of the nozzle, which is provided in the operation unit, and which switches off supply of the gas from the compressed air source to the nozzle .
The observation lens is provided on the outer peripheral surface on the distal end side of the adapter when the adapter is attached, and is provided on the outer peripheral side surface on the distal end side of the insertion portion when the adapter is not attached. And
The tip of the nozzle is positioned behind the observation lens in the insertion direction, and the tip side of the nozzle has a shape that is flattened and deformed without blocking the flow path. An endoscope characterized by that. An endoscope comprising an elongated insertion portion and an operation portion located behind the insertion portion in the insertion direction,
When an adapter is attached to the distal end of the insertion portion in the insertion direction, the insertion portion is detachable with respect to either the outer periphery of the insertion portion in the insertion direction or the outer periphery of the adapter. When the adapter is not attached to the tip of the part, a multi-lumen tube that is detachable on the outer periphery on the tip side in the insertion direction of the insertion part,
Formed in the multi-lumen tube, when the adapter is attached, at least one of the insertion portion and the adapter is inserted; when the adapter is not attached, the insertion portion is inserted; A first hole formed along the insertion direction;
A second hole formed in the insertion direction other than the first hole formed in the multi-lumen tube;
The adapter having the distal end side fixed to the multi-lumen tube by inserting the distal end side in the insertion direction through the second hole located along the insertion direction on the outer periphery of the insertion portion is mounted. If the adapter is not attached, the adapter is attached to the observation lens provided on the distal end side of the insertion portion together with the gas from the distal end in the insertion direction. A nozzle for ejecting liquid, the tip having a deformed shape different from other parts;
A compressed air source for supplying gas to the nozzle;
A liquid supply source for supplying liquid to the nozzle;
A change-over switch fixed on the base end side in the insertion direction of the nozzle, which is provided in the operation unit, and which switches off supply of the gas from the compressed air source to the nozzle.
The observation lens is provided on the tip surface on the tip side of the adapter when the adapter is attached, and on the tip surface on the tip side of the insertion portion when the adapter is not attached. Provided,
The tip side of the nozzle has a shape that is flattened and deformed without blocking the flow path, and the flow path of the nozzle is blocked in front of the observation lens in the insertion direction. It has a deformed shape by being folded,
An ejection port for supplying the liquid together with the gas to the observation lens is formed at a position behind the folding portion of the nozzle in the insertion direction and at a position ahead of the observation lens in the insertion direction. Endoscope. An endoscope comprising an elongated insertion portion and an operation portion located behind the insertion portion in the insertion direction,
When an adapter is attached to the distal end of the insertion portion in the insertion direction, the insertion portion is detachable with respect to either the outer periphery of the insertion portion in the insertion direction or the outer periphery of the adapter. When the adapter is not attached to the tip of the part, a multi-lumen tube that is detachable on the outer periphery on the tip side in the insertion direction of the insertion part,
Formed in the multi-lumen tube, when the adapter is attached, at least one of the insertion portion and the adapter is inserted; when the adapter is not attached, the insertion portion is inserted; A first hole formed along the insertion direction;
A second hole formed in the insertion direction other than the first hole formed in the multi-lumen tube;
The adapter having the distal end side fixed to the multi-lumen tube by inserting the distal end side in the insertion direction through the second hole located along the insertion direction on the outer periphery of the insertion portion is mounted. If the adapter is not attached, the adapter is attached to the observation lens provided on the distal end side of the insertion portion together with the gas from the distal end in the insertion direction. A nozzle for ejecting liquid, the tip having a deformed shape different from other parts;
A compressed air source for supplying gas to the nozzle;
A liquid supply source for supplying liquid to the nozzle;
A change-over switch fixed on the base end side in the insertion direction of the nozzle, which is provided in the operation unit, and which switches off supply of the gas from the compressed air source to the nozzle.
An endoscope , wherein an uneven portion is formed at a portion inserted into the second hole of the nozzle . An endoscope comprising an elongated insertion portion and an operation portion located behind the insertion portion in the insertion direction,
When an adapter is attached to the distal end of the insertion portion in the insertion direction, the insertion portion is detachable with respect to either the outer periphery of the insertion portion in the insertion direction or the outer periphery of the adapter. When the adapter is not attached to the tip of the part, a multi-lumen tube that is detachable on the outer periphery on the tip side in the insertion direction of the insertion part,
Formed in the multi-lumen tube, when the adapter is attached, at least one of the insertion portion and the adapter is inserted; when the adapter is not attached, the insertion portion is inserted; A first hole formed along the insertion direction;
A second hole formed in the insertion direction other than the first hole formed in the multi-lumen tube;
The adapter having the distal end side fixed to the multi-lumen tube by inserting the distal end side in the insertion direction through the second hole located along the insertion direction on the outer periphery of the insertion portion is mounted. If the adapter is not attached, the adapter is attached to the observation lens provided on the distal end side of the insertion portion together with the gas from the distal end in the insertion direction. A nozzle for ejecting liquid, the tip having a deformed shape different from other parts;
A compressed air source for supplying gas to the nozzle;
A liquid supply source for supplying liquid to the nozzle;
A change-over switch fixed on the base end side in the insertion direction of the nozzle, which is provided in the operation unit, and which switches off supply of the gas from the compressed air source to the nozzle.
An endoscope , further comprising a wire having one end fixed to the multi-lumen tube and the other end fixed to a coil covering the outer periphery of the insertion portion on the distal end side . A projecting portion that extends outward in the radial direction of the nozzle is formed in the folded portion,
The endoscope according to claim 2 , wherein the projecting portion is locked to a distal end surface of the multi-lumen tube in the insertion direction . The endoscope according to any one of claims 1, 2, 4, and 5, wherein an uneven portion is formed at a portion of the nozzle inserted into the second hole . The multi-lumen tube is formed to have a length that covers at least one of the distal end side of the insertion portion and the distal end side of the adapter when the adapter is mounted, and the adapter is not mounted The endoscope according to claim 1 , wherein the endoscope is formed to have a length that covers at least the distal end side of the insertion portion . The wire further comprising: one end fixed to the multi-lumen tube and the other end fixed to a coil covering the outer periphery of the insertion portion on the distal end side. The endoscope according to any one of the above. The compressed air source and the liquid supply source are respectively fixed to the changeover switch via tubes,
The gas supplied from the compressed air source to the changeover switch via the tube connected to the compressed air source is supplied to the liquid supply at a midway position of the tube connecting the changeover switch and the liquid supply source. The endoscope according to any one of claims 1 to 8, further comprising a check valve that prevents the gas from being supplied to a source . The endoscope according to any one of claims 1 to 9, wherein the liquid supply source is a manual syringe pump .

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