JP2008058681A - Endoscope device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an endoscope device capable of easily inserting even a thin, complicatedly bent tube by securely transmitting required projectile force to an insertion part without decreasing the flexibility of the insertion part. <P>SOLUTION: The endoscope device 1 includes: an endoscope 2 that has a leading end 21 with an observing means 20 capable of observing a test object S and an insertion part 22 extending from the leading end 21 to a basal end, is flexible and bendable according to the test object S; and a first liquid injection means 4 used to inject a fluid toward the leading end from the basal end of the endoscope 2. The periphery of the leading end 21 or the insertion part 22 of the endoscope 2 is provided with a projecting flange 25. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an endoscope apparatus for observing a subject.

In recent years, in various fields such as the medical field and the industrial field, an endoscope apparatus having an insertion part that can be inserted into a subject is used so that a narrowed part such as a duct that cannot be directly observed by an observer can be observed. Has been. The insertion part of such an endoscope apparatus is required to be flexible so that it can be freely bent inside the subject in order to obtain a good insertion property. However, if a certain degree of flexibility is given, the rigidity is lowered, and it becomes impossible to push the inside of the subject from the proximal end side, resulting in a problem that the insertability is lowered. In order to solve such a problem, the pressurizing tube extends from the proximal end of the insertion portion to the distal end and the distal end portion is formed in a J-shape, and the fluid is sent from the proximal end side to the pressurizing tube. An endoscope apparatus provided with ejection means having a syringe has been proposed (see, for example, Patent Document 1). In this endoscope apparatus, by sending a fluid to the pressurizing tube by a syringe, the delivered fluid is ejected toward the proximal end side at the distal end of the insertion portion, and thereby propelling force is applied to the distal end of the insertion portion. It is said that it is possible to generate and insert the insertion part into the subject.
Japanese Unexamined Patent Publication No. 7-313443

  However, in the endoscope apparatus of Patent Document 1, in order to eject the fluid from the distal end of the pressurizing tube having a pressure necessary as a means for generating a propulsive force, it is formed in a long shape along the insertion portion. It was necessary to make the inner diameter of the pressurizing tube larger than a certain value so that there is no pressure loss in the pressurizing tube. On the other hand, by thickening the pressurizing tube to ensure the necessary propulsive force, the flexibility of the insertion portion is reduced, making it difficult to insert into a narrow and complicatedly bent conduit. There was a problem.

  The present invention has been made in view of the above-described circumstances, and is capable of reliably transmitting necessary thrust to the insertion portion without reducing the flexibility of the insertion portion, so that the tube is thin and complicatedly bent. An endoscope apparatus that can be easily inserted even on a road is provided.

In order to solve the above problems, the present invention proposes the following means.
An endoscope apparatus according to the present invention has a distal end portion having observation means capable of observing a subject, and extends from the distal end portion to the proximal end side, and has flexibility and can be bent according to the subject. An endoscope comprising an insertion portion, and a first fluid ejecting means for ejecting a fluid from the proximal end side to the distal end side of the endoscope, the distal end portion or the insertion portion of the endoscope includes: It is characterized by the provision of a flange that projects to the outer periphery.

  According to the endoscope apparatus of the present invention, the endoscope is arranged inside the subject so that the subject can be observed by the observation means at the distal end by bending the insertion portion according to the subject. Established. If the fluid is ejected from the first fluid ejecting means in this state, the fluid is guided to the subject from the proximal end side to the distal end side of the endoscope and ejected to the buttocks. At this time, since the fluid passes through the inside of the subject, the fluid can be ejected to the heel part while suppressing the pressure loss. For this reason, the endoscope is suitably inserted by the fluid ejected to the buttocks and further inserted into the subject. At this time, the endoscope only has a collar portion at a part thereof, and the first fluid ejecting means for generating the propulsive force only ejects the fluid from the proximal end side of the endoscope. For this reason, the endoscope can obtain a driving force for insertion while ensuring the flexibility of the insertion portion, and can improve the insertability.

In the endoscope apparatus described above, it is more preferable that the collar portion of the endoscope is detachably attached to the distal end portion or the insertion portion.
According to the endoscope apparatus according to the present invention, the endoscope apparatus can be used with the buttocks removed from the endoscope, and versatility can be improved.

In the above endoscope apparatus, it is more preferable that the outer diameter of the insertion portion of the endoscope is set smaller than the outer diameter of the distal end portion.
According to the endoscope apparatus according to the present invention, since the insertion portion is set to have an outer diameter smaller than that of the distal end portion, the flexibility of the insertion portion can be improved and the insertion property can be further improved. .

  In the endoscope apparatus described above, the collar portion of the endoscope has an insertion hole formed so that the distal end portion or the insertion portion is inserted and an outer diameter from the insertion portion to the distal end portion. It is more preferable to provide a hood locked to the distal end side at the proximal end of the distal end portion that becomes larger.

  According to the endoscope apparatus according to the present invention, the hood is in a state of projecting to the outer periphery of the distal end portion or the insertion portion by inserting the distal end portion or insertion portion of the endoscope through the insertion hole, and the heel portion Form. In this state, if the fluid is ejected from the first fluid ejecting means, the hood is locked to the distal end side at the proximal end of the distal end portion. The endoscope can be inserted into the subject. On the other hand, if the lock | rock at the base end of a front-end | tip part is cancelled | released, since only a front-end | tip part or an insertion part is penetrated by the insertion hole, the hood can also be used in the removed state.

  Further, in the above endoscope apparatus, the collar portion of the endoscope is locked to the proximal end of the distal end portion in a state of being fitted on the insertion portion on the distal end side with respect to the hood. It is more preferable that an engagement member is provided, and an inner diameter of the insertion hole of the hood is set to be larger than an outer diameter of the tip portion and smaller than an outer diameter of the engagement member. .

  According to the endoscope apparatus according to the present invention, the insertion portion is in a state where the locking member having an outer diameter larger than the inner diameter of the insertion hole of the hood is locked to the proximal end of the distal end portion, It is arrange | positioned rather than the latching member at the base end side. That is, the hood can be inserted / removed from the distal end side of the endoscope by setting the inner diameter of the insertion hole larger than the outer diameter of the distal end portion, while being locked to the distal end side by the locking member. The propulsive force generated in the hood can be reliably transmitted to the tip portion via the locking member.

  Further, in the above endoscope apparatus, the collar portion of the endoscope includes a fixing member that is externally fitted to the insertion portion on the proximal end side with respect to the hood, and the hood includes the locking member and the hood. It is more preferable that it is sandwiched between the fixing member.

  According to the endoscope apparatus according to the present invention, the hood is locked to the distal end side by the locking member, and is also locked to the proximal end side by the fixing member. For this reason, the integrity of the hood and the insertion portion can be improved, and the propulsive force generated in the hood can be more reliably transmitted to the tip portion via the locking member.

  Further, in the above endoscope apparatus, the collar portion of the endoscope includes a locking member locked to the proximal end of the distal end portion in a state of being fitted on the distal end portion or the insertion portion. The hood may be configured such that an inner diameter of the insertion hole is set to be larger than an outer diameter of the distal end portion, and is fitted and fixed to the locking member through the insertion hole.

  According to the endoscope apparatus of the present invention, the locking member is externally fitted to the distal end portion or the insertion portion in a state of being locked to the proximal end of the distal end portion, and the hood is externally fixed to the locking member. ing. For this reason, while the hood can be inserted into and removed from the distal end side of the endoscope by being removed from the locking member, the hood is locked to the distal end side via the locking member and is generated in the hood. The propulsive force can be reliably transmitted to the tip portion via the locking member.

  Further, in the above endoscope apparatus, the locking member of the collar portion has a notch reaching from the outer periphery to a through hole through which the insertion portion is inserted, and the distal end portion or the An endoscope apparatus characterized in that the insertion portion is detachably elastically deformable.

  According to the endoscope apparatus according to the present invention, the locking member is locked to the proximal end of the distal end portion with the distal end portion or the insertion portion inserted into the through hole, and is elastically deformed to open the cut. Thus, it can be easily detached from the distal end portion or the insertion portion.

  Further, in the above endoscope apparatus, the distal end portion of the endoscope includes a main body portion provided at a distal end of the insertion portion and an adapter detachably provided on the main body portion, The part may be provided in the adapter.

  According to the endoscope apparatus according to the present invention, the distal end portion is composed of the main body portion and the adapter, so that various adapters can be mounted according to the purpose of use, and the collar portion is easily attached together with the adapter. It becomes possible to attach and detach.

In the endoscope apparatus described above, it is more preferable that a plurality of the heel portions of the endoscope are provided at the distal end portion or the insertion portion.
According to the endoscope apparatus according to the present invention, by providing a plurality of flanges, propulsive force can be generated at a plurality of positions by the fluid ejected from the first fluid ejecting means. The insertion property of the mirror can be further improved.

  In the endoscope apparatus described above, it is more preferable that the plurality of flanges of the endoscope are set so that the outer diameter gradually decreases from the distal end side to the proximal end side. ing.

  According to the endoscope apparatus according to the present invention, the outer diameters of the plurality of flanges are set so as to decrease stepwise from the distal end side to the proximal end side, and thus are ejected from the first fluid ejecting means. A part of the fluid is jetted to the collar part to generate a propulsive force, and a part of the fluid flows from the outer periphery to the tip side and is also ejected to the collar part on the tip side. For this reason, even if there are a plurality of flanges, the fluid can be surely flowed to the tip side, and a propulsive force can be suitably generated at each flange.

  In the endoscope apparatus described above, a fluid that is substantially tubular and includes a guide tube disposed on an outer periphery of the insertion portion at a base end side with respect to the flange portion, and is ejected from the first fluid ejecting means. Is more preferably supplied from the proximal end side of the guide tube to the distal end side through the inside.

  According to the endoscope apparatus according to the present invention, in the range where the guide tube is disposed, rigidity can be increased by the guide tube, and the endoscope inserted through the guide tube is pushed together with the guide tube from the proximal end side. Can be inserted into the subject. In addition, when the first fluid ejecting means generates a propulsive force and inserts the endoscope into the subject, the fluid is supplied through the inside of the guide tube, so that the buttock can be efficiently used with a small flow rate. Propulsive force can be generated. Furthermore, since the frictional resistance of the insertion portion is reduced by the guide tube, the insertability can be improved.

  The endoscope apparatus may further include second fluid ejecting means for ejecting fluid from the proximal end side to the distal end side of the guide tube outside the guide tube, and the guide tube projects to the outer periphery. It is more preferable that a tube side flange is provided.

  According to the endoscope apparatus according to the present invention, it is possible to generate a propulsive force also in the guide tube via the tube side collar by ejecting the fluid from the second fluid ejecting means to the tube side collar. . For this reason, not only can the endoscope itself be inserted by the fluid ejected from the first fluid ejecting means, but also the guide tube can be inserted by the fluid ejected from the second fluid ejecting means.

  According to the endoscope apparatus of the present invention, the endoscope is provided with the collar portion and includes the first fluid ejecting means, so that the necessary propulsion is achieved without reducing the flexibility of the insertion portion. The force can be reliably transmitted to the insertion portion, and the insertability can be improved. For this reason, even a narrow and complicatedly bent pipe line can be easily inserted.

  Hereinafter, an endoscope apparatus according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an endoscope apparatus 1 as an embodiment of the present invention. The endoscope apparatus 1 includes an endoscope 2 to be inserted into a subject S, a main body storage box 3 for storing the endoscope 2, and fluid ejecting means 4 (first first) capable of ejecting compressed air as a fluid. Fluid ejecting means).

  The main body storage box 3 includes a box main body portion 5 and a lid portion 6, and the lid portion 6 and the box main body portion 5 are attached so as to be openable and closable. A rotatable cylindrical take-up drum 7 is provided inside the box body 5. One end surface of the winding drum 7 is exposed to the outside from the side surface of the main body storage box 3, and a handle 8 is provided. The take-up drum 7 is formed in a hollow shape, and a power supply unit 9 for supplying power and a camera control unit 10 for processing image signals are accommodated in the space. A liquid crystal monitor 11 for displaying an image is rotatably provided on the top surface 5a of the box body 5 by a pole 11a.

  The fluid ejecting means 4 is provided integrally with the main body storage box 3, and an air compressor 12 capable of discharging compressed air as a fluid, an air tube 13 for guiding the compressed air discharged from the air compressor 12, And a cock 14 that is provided at the distal end and is capable of switching the presence or absence of injection of compressed air. The compressed air discharged from the air compressor 12 is discharged from the nozzle 15 provided on the top surface 5 a via the inside of the box body 5, and the base end of the air tube 13 is connected to the nozzle 15. Thus, the compressed air can be discharged from the tip of the air tube 13.

  The endoscope 2 described above is formed in an elongated shape, and the proximal end of the endoscope 2 is connected to a winding drum 7. That is, the endoscope 2 extends outward from the main body storage box 3 by being pulled out, and conversely, by placing a hand on the handle 8 and rotating the winding drum 7, the winding drum 7 is rotated. 7 and is accommodated in the main body storage box 3.

  The endoscope 2 includes a distal end portion 21 having an observation means 20 and an insertion portion 22 extending from the distal end portion 21 to the proximal end side. As shown in FIG. 2, the distal end portion 21 is covered with a hard outer cylinder portion 21a, and the observation means 20 is built therein so as to be exposed from the distal end 21b. The observation means 20 has, for example, a charge coupled device (CCD), which can obtain an observation image of the subject S, and is illustrated via an imaging cable (not shown) that passes through the insertion portion 22. 1 is connected to the inside of the box main body 5 shown in FIG. 1 and is supplied with power from the power supply unit 9, and can transmit a captured image signal to the camera control unit 10. Moreover, the insertion part 22 has the flexibility which can be bent according to the subject S to be inserted, and is formed of, for example, an elastomer resin. As described above, various cables for electrically connecting the distal end portion 21 and the box main body portion 5 such as an imaging cable are inserted inside. Further, a reinforcing wire may be inserted as a core material for improving the tensile strength. In the present embodiment, the outer diameter of the insertion portion 22 is set to be smaller than the outer diameter of the distal end portion 21, thereby improving the flexibility of the insertion portion 22 and at the proximal end 21 c of the distal end portion 21. A reduced diameter portion 21d is formed.

  Further, in the endoscope 2, a flange portion 25 that protrudes from the outer periphery of the insertion portion 22 is provided at the distal end of the insertion portion 22. FIG. 3 is an enlarged cross-sectional view of the vicinity of the collar part 25 of the endoscope 2, and FIG. 4 is an exploded view of the collar part 25. As shown in FIGS. 3 and 4, the flange portion 25 includes a substantially cylindrical hood 26 having a bottom portion 26 a on the distal end side, and a substantially disc-shaped locking member 27 disposed on the distal end side of the hood 26. And a substantially cylindrical fixing member 28 disposed on the base end side with respect to the hood 26, and a substantially cylindrical ring 29 externally fitted to the fixing member 28. The locking member 27 is formed of a metal piece or the like, and is externally fitted to the insertion portion 22 by a through hole 27a formed at the center. The inner diameter of the through hole 27 a is set to be a diameter through which the insertion portion 22 can be inserted and is set to be smaller than the outer diameter of the distal end portion 21. For this reason, the locking member 27 is locked to the distal end side by the reduced diameter portion 21 d formed at the proximal end 21 c of the distal end portion 21 in a state of being fitted to the insertion portion 22. Further, the locking member 27 is formed with a notch 27b extending from the outer periphery to the through hole 27a, and can be elastically deformed by being formed of a metal piece or the like. For this reason, it is possible to attach and detach the locking member 27 from the insertion portion 22 in the radial direction by elastically deforming and opening the notch 27b.

  The fixing member 28 is formed of an elastic member such as rubber, and is externally fitted to the insertion portion 22 through a through hole 28a formed at the center. The inner diameter of the through hole 28 a is set to be approximately equal to or slightly smaller than the outer diameter of the insertion portion 22, and the fixing member 28 is fixed in the axial direction by friction generated between the insertion hole 22 and the insertion hole 22. Further, the fixing member 28 is also formed with a cut 28b extending from the outer periphery to the through hole 28a, and is formed of an elastic member such as rubber, so that the cut 28b is elastically deformed to be opened. The member 28 can be detached from the insertion portion 22 in the radial direction. Further, the inner diameter of the ring 29 is set to be substantially equal to the outer diameter of the fixing member 28, the ring 29 and the fixing member 28 are fixed by friction, the notch 28 b is opened, and the fixing member 28 is dropped from the insertion portion 22. Is prevented.

  Further, the hood 26 has an insertion hole 26b formed in the bottom portion 26a, and the insertion portion 22 is inserted through the insertion hole 26b. The inner diameter of the insertion hole 26 b is set larger than the outer diameter of the distal end portion 21 and smaller than the outer diameters of the locking member 27 and the fixing member 28. For this reason, in a state where the hood 26, the locking member 27, the fixing member 28, and the ring 29 are assembled as the flange portion 25 in the insertion portion 22, the hood 26 is sandwiched between the locking member 27 and the fixing member 28 at the bottom portion 26a. In this state, it is firmly supported so as not to wobble, is locked to the distal end side by the locking member 27, is locked to the proximal side by the fixing member 28, and is integrated with the insertion portion 22.

  FIG. 5 shows an assembling procedure of the collar portion 25. As shown in FIG. 5A, first, the hood 26 and the ring 29 are arranged in this order from the distal end side, and the insertion portion 22 is inserted through them. At this time, since the inner diameter of the insertion hole 26b of the hood 26 is set to be larger than the outer diameter of the distal end portion 21, the insertion can be made from the distal end of the distal end portion 21, and the long endoscope 2 can be inserted. Since it is not necessary to pass through from the base end side, assembly is easy. Next, as shown in FIG. 5B, the locking member 27 is externally fitted to the distal end side of the hood 26 in the insertion portion 22. More specifically, first, the locking member 27 is elastically deformed so as to be twisted in the axial direction, and the cut 27b is opened. And the engaging member 27 will be in the state externally fitted by the insertion part 22 by inserting the insertion part 22 from the radial direction in the open cut 27b. Similarly, as shown in FIG. 5C, the fixing member 28 is externally fitted between the hood 26 and the ring 29 in the insertion portion 22. That is, the fixing member 28 is elastically deformed in the circumferential direction at the position of the notch 28b, and the fixing member 28 is externally fitted to the insertion portion 22 by being fitted into the insertion portion 22 from the radial direction with the notch 28b being opened. It will be in the state. In this state, the fixing member 28 is pushed into the distal end side, the bottom portion 26a of the hood 26 is sandwiched between the locking member 27, and the ring 29 is finally fitted onto the fixing member 28, whereby the flange portion 25 is assembled. It is done.

  Next, the operation of the endoscope apparatus 1 will be described. FIG. 6 shows a state in which the endoscope 2 of the endoscope apparatus 1 is disposed in the inside S2 of the duct S1 that is the subject S. As shown in FIG. 6, the insertion portion 22 is flexible, and thus is disposed so as to be curved according to the shape of the pipe line S1. In this state, the distal end portion of the air tube 13 of the fluid ejecting means 4 is arranged at the base end S3 of the pipe line S1, and the compressed air A is jetted into the inside S2 of the pipe line S1 by operating the cock 14. The injected compressed air A is guided to the distal end side of the pipe line S <b> 1 and is injected to the bottom portion 26 a of the hood 26 of the flange portion 25. For this reason, the hood 26 is given a propulsive force toward the distal end side by the compressed air A to be injected. Since the hood 26 is locked to the distal end side by the locking member 27 as described above, the propulsive force given by the compressed air A is transmitted to the distal end portion 21 where the locking member 27 is locked. Thus, the entire endoscope 2 is inserted into the distal end side. Moreover, since the insertion part 22 is a thin and flexible structure, even a bent pipe has little resistance, and efficiently transmits the propulsive force when it is inserted. At this time, the pipeline S1 through which the compressed air A passes has a larger cross-sectional area than the case where the compressed air A is piped inside the endoscope 2, so that the compressed air A can be injected while suppressing pressure loss. Propulsive force can be generated. Further, since the shape of the hood 26 is formed in a cylindrical shape having the bottom portion 26a, the pressure of the compressed air A can be effectively converted into a propulsive force.

  As described above, in the endoscope apparatus 1, the insertion portion 22 of the endoscope 2 has only the collar portion 25 at a part thereof, and the fluid ejecting means 4 that generates a propulsive force is the endoscope 2. Only the compressed air A is injected from the base end side. For this reason, the endoscope 2 can obtain a driving force for insertion while ensuring the flexibility of the insertion portion 22, and can improve the insertability. Therefore, even if the subject is a thin and complicatedly curved conduit, it can be easily inserted. In the present embodiment, the hood 26, the locking member 27, the fixing member 28, and the ring 29 that constitute the collar portion 25 are all detachable. For this reason, it can also be used so that the member which comprises the collar part 25 may be removed, and it may be pushed in and inserted from the base end side, and it has a highly versatile structure. Moreover, since each structure of the collar part 25 can be attached or detached to either the front end side of the front-end | tip part 21, or radial direction, it can attach or detach easily also with the long endoscope 2. FIG. Further, for example, in the case where the pipe line S1 has an inspection port or the like on the distal end side, the fluid ejection means 4 is once inserted to the position of the inspection port, and after removing only the collar portion 25 from the inspection port and collecting it, it is withdrawn. However, the inside S2 of the pipe line S1 can be observed by the observation means 20.

  7 and 8 show a first modification of the present embodiment. FIG. 7 is an enlarged perspective view of the vicinity of the collar part 31 in the endoscope 30 according to this modification, and FIG. 8 is an exploded view of the collar part 31. As shown in FIGS. 7 and 8, the collar portion 31 of the endoscope 30 according to this modification is configured by a substantially hemispherical hood 32 having a concave surface 32 a and a locking member 27. The hood 32 has an insertion hole 32 b having an inner diameter that is larger than the outer diameter of the distal end portion 21 and smaller than the outer diameter of the locking member 27, and the insertion portion 22 is inserted therethrough. Similarly to the above, the insertion portion 22 is locked to the distal end side by a locking member 27 disposed on the distal end side of the hood 32. Also in the endoscope 30 of this modified example, if the compressed air is ejected by the fluid ejecting means, the compressed air is ejected to the hood 32 that is locked to the distal end portion 21 by the locking member 27. The entire endoscope 30 can be inserted by the propulsive force generated in the above. Further, the hood 32 has a substantially hemispherical shape and has a small frictional resistance in the insertion direction, and the propelling force can be efficiently generated by jetting compressed air to the concave surface 32a. In this modification, the fixing member is not provided and the hood 32 is configured to be movable to the proximal end side. However, even in such a configuration, the hood 32 is locked to the locking member 27 by jetting compressed air. It is possible to transmit the propulsive force to the tip portion 21.

  9 and 10 show a second modification of the present embodiment. FIG. 9 is an enlarged perspective view of the vicinity of the collar 41 in the endoscope 40 according to this modification, and FIG. 10 is an exploded view of the collar 41. As shown in FIGS. 9 and 10, the collar portion 41 of the endoscope 40 according to the present modification is configured by a substantially disc-shaped hood 42 and a locking member 27. Similarly to the above, the hood 42 has an insertion hole 42 a having an inner diameter that is larger than the outer diameter of the distal end portion 21 and smaller than the outer diameter of the locking member 27, and the insertion portion 22 is inserted therethrough. In the same manner as described above, the insertion portion 22 is locked to the distal end side by the locking member 27 disposed on the distal end side of the hood 42. Even if the surface that receives the compressed air of the hood 42 is flat like the collar portion 41 of the endoscope 40 of this modification, the entire endoscope 40 is generated by generating a propulsive force by the injected compressed air. Can be inserted.

  FIG. 11 shows a third modification of the present embodiment. FIG. 11 shows an enlarged perspective view of the vicinity of the collar 51 in the endoscope 50 of the present modification. As shown in FIG. 11, the collar portion 51 of the endoscope 50 according to this modification is configured by a substantially spherical hood 52 and a locking member 27. The hood 52 is formed of, for example, urethane, and has an insertion hole 52a having an inner diameter larger than the outer diameter of the distal end portion 21 and smaller than the outer diameter of the locking member 27, and the insertion portion 22 is inserted through the hood 52. In this state, it is locked to the distal end side by the locking member 27. As described above, even if the hood 52 is substantially spherical, it is possible to similarly generate propulsive force and insert the entire endoscope 50 by injecting compressed air to the base end side of the spherical surface. is there. In any of the above cases, the hood is locked to the distal end side by the locking member 27. However, the present invention is not limited to this. For example, in the present modification, the hood itself can be locked to the distal end portion 21 by making the inner diameter of the insertion hole 52 a smaller than the outer diameter of the distal end portion 21. Also in this case, for example, the hood is formed of an elastically deformable material such as urethane as in the third modification, so that the insertion hole 52a can be elastically expanded to be attached and detached from the distal end side of the distal end portion 21. It is possible to do. Alternatively, even when the annular balloon is inflated as a hood at the distal end of the insertion portion 22, the locking member 27 is not required, and it can be detached from the distal end side by being contracted.

  12 to 14 show a fourth modification of the present embodiment and show another example having no locking member. FIG. 12 is an enlarged perspective view of the vicinity of the collar 61 in the endoscope 60 of this modification, FIG. 13 is a cross-sectional view, and FIG. 14 is an explanatory diagram when the collar 61 is assembled to the insertion section 22. As shown in FIGS. 12 and 13, the collar portion 61 of the endoscope 60 according to the present modification is configured by a hood 62 having a bottom portion 62 a. An insertion hole 62b is formed in the bottom 62a, and the insertion part 22 is inserted through the insertion hole 62b. The inner diameter of the insertion hole 62b is set smaller than the outer diameter of the distal end portion 21. Such a hood 62 is formed by an approximately L-shaped L-shaped member 63 that can be elastically deformed, such as a metal plate, and is curved by overlapping one end 63c with both sides 63a and 63b. 62 c is formed, and the bottom 62 a and the insertion hole 62 b are formed by the other piece 63 d. In the endoscope 60 of this modification, the inner diameter of the insertion hole 62b is set to be smaller than the outer diameter of the distal end portion 21, so that the hood 62 is locked to the distal end portion 21 by its own bottom portion 62a. It becomes. For this reason, the propulsive force generated by the compressed air injected to the hood 62 can be transmitted to the distal end portion 21 and inserted. On the other hand, the L-shaped member 63 forming the hood 62 can be elastically deformed, and by widening the overlap of both end portions 63a and 63b, the diameter of the insertion hole 62b is increased and the distal end side of the distal end portion 21 is increased. The cylindrical portion 62c can be opened and attached or detached in the radial direction of the insertion portion 22.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. 15 to 17 show a second embodiment of the present invention. In this embodiment, members that are the same as those used in the above-described embodiment are assigned the same reference numerals, and descriptions thereof are omitted.

  As shown in FIGS. 15 to 17, in the endoscope apparatus of this embodiment, the collar portion 71 of the endoscope 70 has a substantially cylindrical shape and a locking member 72 that is externally fitted to the insertion portion 22, and an insertion hole. 73a and a hood 73 that is externally fixed to the locking member 72. The locking member 72 is formed of an elastic member such as rubber and is externally fitted to the insertion portion 22 through a through hole 72a formed in the center. The locking member 72 has a cut 72b that extends from the outer periphery to the through hole 72a, and is elastically deformed to open the cut 72b so that the locking member 72 can be attached and detached in the radial direction of the insertion portion 22. On the other hand, in the state where it is attached to the insertion portion 22, it is locked to the distal end side by the reduced diameter portion 21 d of the distal end portion 21.

  The hood 73 is substantially cylindrical and has an insertion hole 73a. The hood 73 is substantially cylindrical and is screwed to the screw 74a of the pedestal 74 on the inner peripheral surface. A retaining ring 75 in which a female screw 75a is formed is provided, and a disc 76 having a through hole 76a that can be fitted onto the base 74 is provided. The base 74 is formed with an inner flange 74b projecting on the inner peripheral surface side and an outer flange 74c projecting on the outer peripheral surface side on the base end side. The retaining ring 75 is formed with an inner flange 75b that protrudes toward the inner peripheral surface at the tip side. The inner diameters of the inner flanges 74 b and 75 b of the pedestal 74 and the retaining ring 75 are set larger than the outer diameter of the distal end portion 21. Further, in a state where the pedestal 74 is externally fitted to the locking member 72 and the retaining ring 75 and the disc 76 are assembled, the disc 76 is sandwiched between the outer flange 74 c of the pedestal 74 and the end of the retaining ring 75. While being in a fixed state, the locking member 72 is sandwiched between the base 74 and the inner flanges 74b and 75b of the retaining ring 75. That is, as a result, the pedestal 74, the retaining ring 75, and the disc 76 that constitute the hood 73 are integrated and are fitted and fixed to the locking member 72.

  Similarly, in the endoscope 70 of the present embodiment, a propulsive force is generated by jetting compressed air to the disc 76 of the hood 73, and this propulsive force is connected via a locking member 72 that is externally fitted and fixed. By transmitting to the distal end portion 21, the entire endoscope 70 can be inserted. Further, by loosening the pedestal 74 and the retaining ring 75 that are screwed together, the fixing with the locking member 72 is released, and each of the pedestal 74, the retaining ring 75, and the disc 76 constituting the hood 73 is inserted. It can be easily attached and detached from the portion 22 to the tip side.

  18 and 19 show a first modification of this embodiment. As shown in FIGS. 18 and 19, the collar portion 81 of the endoscope 80 according to this modification includes a locking member 72 and a hood 82 that is externally fitted and fixed to the locking member 72 through an insertion hole 82a. The hood 82 is a substantially cylindrical member having an insertion hole 82a. The inner diameter of the insertion hole 82 a is set to be approximately equal to or slightly smaller than the outer diameter of the locking member 72, and is externally fixed by friction generated between the insertion hole 82 a and the locking member 72. In addition, a disc portion 82b is formed on the base end side of the hood 82 so as to project to the outer periphery. In the endoscope 80 according to this modification, the hood 82 is only fitted and fixed to the locking member 72 by friction, but it opposes the propulsive force generated by the injection of compressed air to the disk portion 82b of the hood 82. If it has a possible frictional force, the configuration can be simplified, it is easy to attach and detach, and the cost of components can be reduced.

  20 and 21 show a second modification of this embodiment. As shown in FIGS. 20 and 21, the collar portion 91 of the endoscope 90 according to this modification includes a locking member 72 and a hood 92 that is externally fitted and fixed to the locking member 72 through an insertion hole 92a. The hood 92 has a substantially cylindrical shape and is fitted and fixed by friction generated between the hood 92 and the locking member 72 through the insertion hole 92a. In addition, a plurality of blade portions 92 b projecting radially on the outer periphery are formed on the base end side of the hood 92. As in this modification, the shape of the portion of the hood where the compressed air is injected is not limited to the shape protruding over the entire circumference, and may be various shapes depending on the conditions of the subject. Is possible.

(Third embodiment)
Next, a third embodiment of the present invention will be described. 22 to 25 show a third embodiment of the present invention. In this embodiment, members that are the same as those used in the above-described embodiment are assigned the same reference numerals, and descriptions thereof are omitted.

  As shown in FIGS. 22 to 24, the collar portion 101 of the endoscope 100 of this embodiment has a substantially cylindrical shape and a locking member 102 fitted on the distal end portion 21, and a substantially cylindrical shape. And a hood 103 that is externally fitted and fixed to 102. The locking member 102 is formed of an elastic material such as rubber, has a through hole 102 a having an inner diameter substantially equal to the tip portion 21, and is fitted on the tip portion 21. Further, an inner flange 102b projecting from the inner peripheral side is formed on the proximal end side, and is locked to the distal end side by a reduced diameter portion 21d of the distal end portion 21. An outer flange 102c is formed so as to project. A retaining ring 104 is externally fitted to the insertion portion 22 between the inner flange 102b and the reduced diameter portion 21d, so that the inner flange 102b of the locking member 102 is more closely connected to the reduced diameter portion 21d of the distal end portion 21. It is in a state of being securely locked. Further, the locking member 102 is formed with a notch 102d extending from the outer periphery to the through hole 102a. Similarly, the retaining ring 104 is formed with a notch 104b extending from the outer periphery to the through hole 104a in which the insertion portion 22 is fitted. Therefore, as shown in FIG. 24, the locking member 102 and the retaining ring 104 can be fitted into the insertion portion 22 from the radial direction by elastically deforming and opening the notches 102d and 103b, respectively. By being moved to the tip portion 21 side in the state of being made, it is in a state of being locked to the tip portion 21 integrally.

  23 and 25, the hood 103 includes an insertion hole 103a having an inner diameter substantially equal to the outer diameter of the locking member 102, and an annular recess 103b formed annularly around the insertion hole 103a at the proximal end. have. An inner flange 103c projecting from the inner periphery is formed on the proximal end side of the insertion hole 103a. The inner diameter of the inner flange 103c is set larger than the outer diameter of the distal end portion 21. On the other hand, a step portion 103d corresponding to the outer flange 102c of the locking member 102 is formed on the distal end side. That is, as shown in FIG. 24, in the previous step of assembling the locking member 102 and the retaining ring 104, the insertion portion 22 is inserted into the insertion hole 103a of the hood 103 from the distal end side of the distal end portion 21, and then the distal end When the locking member 102 and the retaining ring 104 are assembled to the portion 21 and the hood 103 is moved to the distal end side, the hood 103 has the inner flange 103c engaged with the proximal end of the locking member 102 as shown in FIG. At the same time, the step 103 d is locked to the outer flange 102 c of the locking member 102, so that the step 103 d is fitted and fixed to the locking member 102 at the position of the distal end portion 21.

  As in the endoscope 100 of the present embodiment, the collar portion 101 is provided not at the flexible insertion portion 22 but at the distal end portion 21, so that the compressed air is injected into the hood 103. The propulsive force can be more reliably transmitted to the distal end portion 21 and inserted.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described. FIG. 26 shows a fourth embodiment of the present invention. In this embodiment, members that are the same as those used in the above-described embodiment are assigned the same reference numerals, and descriptions thereof are omitted.

  As shown in FIG. 26, in the endoscope apparatus according to this embodiment, the endoscope 110 includes a distal end portion 111 having an observation means 20 and a flexible insertion portion 112. The distal end portion 111 includes a main body portion 113 provided at the distal end of the insertion portion 112 and an adapter 114 provided detachably at the distal end of the main body portion 113. In the endoscope 110 of the present embodiment, the main body portion 113 and the insertion portion 112 of the distal end portion 111 are set to have substantially the same outer diameter. Further, a male screw 113a is formed on the outer periphery of the front end of the main body 113, while a female screw (not shown) is provided correspondingly to the base end 114a of the adapter 114, and is detachable by screwing together. . The adapter 114 is an optical adapter, for example, and is attached to the main body 113 so that the lens 114b is connected to the observation means 20 of the main body 113 so that the front can be observed and electrically connected to the main body 113. The illumination unit 114c can illuminate the front. In addition, the adapter 114 is provided with a collar portion 115 projecting to the outer periphery over the entire periphery.

  According to the endoscope apparatus of this embodiment, the distal end portion 111 of the endoscope 110 is configured by the main body portion 113 and the adapter 114, so that the endoscope device is not limited to the above-described optical adapter, and variously depending on the purpose of use. A simple adapter can be attached. In addition, the hook part 115 can be easily attached and detached according to the attachment and detachment of the adapter, and can be inserted by compressed air using the fluid ejecting means, and the adapter is removed or the hook part is provided. It is also possible to use an adapter that is not pushed in and inserted from the proximal end side. Further, in the other embodiments described above, the case where the outer diameter of the insertion portion is set smaller than the outer diameter of the tip portion has been described. However, even if the outer diameter is substantially equal as in this embodiment, the insertion portion is not If it has flexibility, it can be inserted by compressed air.

(Fifth embodiment)
Next, a fifth embodiment of the present invention will be described. FIG. 27 shows a fifth embodiment of the present invention. In this embodiment, members that are the same as those used in the above-described embodiment are assigned the same reference numerals, and descriptions thereof are omitted.

  As shown in FIG. 27, an endoscope apparatus 120 according to this embodiment includes an endoscope 121 inserted into a subject S, a main body storage box 3 that stores the endoscope 121, and compressed air as a fluid. And a fluid ejecting means 4 (first fluid ejecting means) capable of ejecting. The endoscope 121 includes a distal end portion 21 having an observation means 20, a flexible insertion portion 122 extending from the distal end portion 21 to the proximal end side, and a flange portion 25 provided at the distal end of the insertion portion 122. Prepare. In addition, a substantially tubular guide tube 123 is arranged on the outer peripheral side of the insertion portion 122 of the endoscope 121 on the proximal end side with respect to the flange portion 25. The guide tube 123 has a flexibility that can be bent in accordance with the subject S. In addition, a connector 122a is provided at the base end of the insertion portion 122 so that it can be attached to and detached from the take-up drum 7 that winds up the insertion portion 122, whereby the insertion portion 122 is inserted into the guide tube 123 from the base end side. It can be inserted. Further, at the base end of the guide tube 123, there is a cap 124 formed with an insertion port 124a for inserting the insertion portion 122 and an injection port 124b for inserting the distal end of the air tube 13 of the fluid ejection means 4 and ejecting compressed air. Is provided.

  According to the endoscope apparatus 120 of this embodiment, the rigidity of the insertion portion 122 can be increased by the guide tube 123 in the range where the guide tube 123 is disposed. For this reason, when the endoscope 121 is inserted by being pushed in from the proximal end side, it can be more suitably inserted into the subject S by being pushed together with the guide tube 123. In addition, when the driving force is generated by the fluid ejecting unit 4 and the endoscope 121 is inserted into the subject S, the compressed air is supplied through the guide tube 123 so that the flow rate can be efficiently reduced. A propulsive force can be generated in the collar portion 25. Moreover, since the insertion part 122 is penetrated by the guide tube 123, the frictional resistance of the insertion part 122 at the time of insertion can be reduced, and insertability can be improved. Furthermore, in the case of the present embodiment, the cap 124 is provided at the proximal end of the guide tube 123, so that the backflow of the compressed air injected into the guide tube 123 by the fluid ejecting means 4 is prevented, and more efficient A propulsive force can be generated in the portion 25.

  FIG. 28 shows a modification of this embodiment. An endoscope apparatus 130 according to this modification includes an endoscope 131 including a distal end portion 21, an insertion portion 122, and a flange portion 25, a fluid ejecting unit 4, and a guide tube 123. The insertion part 122 of the mirror 131 can be attached to any device by a connector 122a. Thus, it is good also as a structure which can be used by attaching the base end of the insertion part 122 to arbitrary apparatuses, without having a winding drum and a monitor.

(Sixth embodiment)
Next, a sixth embodiment of the present invention will be described. FIG. 29 to FIG. 31 show a sixth embodiment of the present invention. In this embodiment, members that are the same as those used in the above-described embodiment are assigned the same reference numerals, and descriptions thereof are omitted.

  As shown in FIG. 29, the endoscope apparatus 140 according to this embodiment includes an endoscope 131, a guide tube 123, and a first fluid ejecting means 141 and a second fluid ejecting means as means for ejecting compressed air. Means 142. The first fluid ejecting means 141 includes an air compressor 12, an air tube 13, and a cock 14, and injects compressed air A1 from the proximal end side of the guide tube 123 through the cap 124 to the distal end side through the inside. It is possible. Similarly, the second fluid ejecting means 142 includes an air compressor 12, an air tube 13, and a cock 14, and compressed air A <b> 2 from the proximal end side to the distal end side of the guide tube 123 outside the guide tube 123. Can be injected.

  In addition, a tube side flange 143 projecting from the outer periphery of the guide tube 123 is provided at the distal end portion of the guide tube 123. As shown in FIGS. 30 and 31, the tube side flange 143 includes a rubber tube 144 that is externally fitted to the distal end portion of the guide tube 123, a substantially cylindrical hood 145 that is externally fitted to the rubber tube 144, and a hood And a cap 146 for fastening and fixing 145. A circumferential groove 123a is provided in the circumferential direction on the outer periphery of the distal end of the guide tube 123, and the rubber tube 144 is fitted on the proximal end side of the circumferential groove 123a. The hood 145 includes a mounting portion 147 having an inner diameter substantially equal to or slightly larger than the outer diameter of the guide tube 123, and a main body portion having a bottom portion 148a and having a stepped diameter from the mounting portion 147 to the proximal end side. 148. At the tip of the attachment portion 147, a locking convex portion 147a that protrudes toward the inner peripheral side in a shape corresponding to the circumferential groove 143a of the guide tube 143 is formed. In addition, the attachment portion 147 is formed with two notches 147b extending in the axial direction from the outer periphery to the inner periphery. A male screw 147d is formed on the outer periphery of the attachment portion 147. The cap 146 has a substantially cylindrical shape, and a female screw 146a corresponding to the male screw 147d of the attachment portion 147 is formed on the inner peripheral surface. In addition, an inner flange 146b that protrudes to the inner peripheral side is formed at the tip of the cap 146.

  That is, the tube side flange 143 first fits the rubber tube 144 on the guide tube 123 at a position on the proximal end side of the circumferential groove 143a. Next, the guide tube 123 is inserted into the hood 145 from the distal end side, and the attachment portion 147 of the hood 145 is externally fitted to the rubber tube 144. At this time, the notch 147 b is formed in the attachment portion 147, so that the diameter can be elastically increased and the rubber tube 144 can be easily fitted on the outside. Then, by fitting the attachment portion 147 to the rubber tube 144, the attachment portion 147 is elastically reduced in diameter and the rubber tube 144 is tightened, and the locking convex portion 147a of the attachment portion 147 is a guide tube. It will be in the state fitted to 123 circumferential groove 123a. Next, the tube side flange 143 is assembled to the guide tube 123 by screwing the cap 146 to the attachment portion 147 of the hood 145 from the distal end side until the inner flange 146b contacts the attachment portion 147. Become.

  According to the endoscope apparatus 140 of this embodiment, the first fluid ejecting means 141 causes the compressed air A1 to be ejected to the collar portion 25 of the endoscope 131 through the inside of the guide tube 123 to generate a propulsive force. By doing so, the endoscope 141 can be inserted. Further, if the compressed fluid A2 is ejected from the proximal end side to the distal end side outside the guide tube 123 by the second fluid ejecting means 142, the compressed air A2 passes through the interior S2 of the conduit S1 and the tube side flange 143. The propelling force can be applied to the guide tube 123. Therefore, not only can the endoscope 131 itself be inserted by the compressed air A1 ejected from the first fluid ejecting means 141, but also the guide tube 123 by the compressed air A2 ejected from the second fluid ejecting means 142. Can also be inserted.

(Seventh embodiment)
Next, a seventh embodiment of the present invention will be described. 32 and 33 show a seventh embodiment of the present invention. In this embodiment, members that are the same as those used in the above-described embodiment are assigned the same reference numerals, and descriptions thereof are omitted.

  As shown in FIG. 32, in the endoscope apparatus of this embodiment, the endoscope 150 is provided with a plurality of flanges 151, 152, 153, and 154 as flanges that protrude from the outer periphery of the insertion part 22. Yes. The hoods 151a, 152a, 153a, and 154a of the flanges 151, 152, 153, and 154 are set so that the outer diameter gradually decreases from the one disposed on the distal end side to the proximal end side. . Note that the configurations of the flange portions 151, 152, 153, and 154 are the same as those of the flange portion 25 of the first embodiment except for the shape of the hood, and thus the details thereof are omitted. Further, an enlarged diameter portion 155 is provided on each distal end side of the flange portions 152, 153, 154 provided in the middle of the insertion portion 22. As shown in FIG. 33, the enlarged-diameter portion 155 is disposed on the outer periphery of the tube member 155a so as to cover the rigid tube member 155a formed of metal or the like disposed on the outer periphery of the insertion portion 22 and the tube member 155a. It is comprised with the provided rubber pipe 155b. Then, a taper portion 155c is formed by covering the tube member 155a with the rubber tube 155b, and the hook members 152, 153, 154 are locked to the taper portion 155c, whereby each hook portion 152, 153 and 154 are fixed.

  Like the endoscope 150 of the endoscope apparatus of this embodiment, by providing a plurality of collars, it is possible to generate a propulsive force at a plurality of positions by compressed air ejected from the fluid ejecting means. The insertion property of the endoscope 150 can be improved. At this time, since the outer diameters of the plurality of flanges 151, 152, 153, 154 are set so as to gradually decrease from the distal end side to the proximal end side, the compressed air ejected from the fluid ejecting means is A part of it is injected into each of the flanges 151, 152, 153, 154 to generate a propulsive force, and a part thereof flows from the outer periphery to the tip side and is also injected into the tip side hook part. For this reason, even if there are a plurality of flanges, the compressed air can surely flow into the distal end side, and a propulsive force can be suitably generated by each of the flanges 151, 152, 153, 154.

  As mentioned above, although embodiment of this invention was explained in full detail with reference to drawings, the concrete structure is not restricted to this embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included.

1 is an overall configuration diagram showing an endoscope apparatus according to a first embodiment of the present invention. In the endoscope apparatus of the 1st Embodiment of this invention, it is the perspective view which expanded the collar part of the endoscope. In the endoscope apparatus of the 1st Embodiment of this invention, it is sectional drawing to which the collar part of the endoscope was expanded. In the endoscope apparatus of the 1st Embodiment of this invention, it is an exploded view of the collar part of an endoscope. It is explanatory drawing which shows the assembly | attachment procedure of the collar part of an endoscope in the endoscope apparatus of the 1st Embodiment of this invention. It is explanatory drawing at the time of inserting the endoscope of the endoscope apparatus of the 1st Embodiment of this invention into a subject. In the endoscope apparatus of the 1st modification of the 1st Embodiment of this invention, it is the perspective view which expanded the collar part of the endoscope. In the endoscope apparatus of the 1st modification of the 1st Embodiment of this invention, it is an exploded view of the collar part of an endoscope. In the endoscope apparatus of the 2nd modification of the 1st Embodiment of this invention, it is the perspective view which expanded the collar part of the endoscope. In the endoscope apparatus of the 2nd modification of the 1st Embodiment of this invention, it is an exploded view of the collar part of an endoscope. In the endoscope apparatus of the 3rd modification of the 1st Embodiment of this invention, it is the perspective view which expanded the collar part of the endoscope. In the endoscope apparatus of the 4th modification of the 1st Embodiment of this invention, it is the perspective view which expanded the collar part of the endoscope. In the endoscope apparatus of the 4th modification of the 1st Embodiment of this invention, it is sectional drawing to which the collar part of the endoscope was expanded. In the endoscope apparatus of the 4th modification of the 1st Embodiment of this invention, it is an exploded view of the collar part of an endoscope. It is the perspective view which expanded the collar part of the endoscope in the endoscope apparatus of the 2nd Embodiment of this invention. It is sectional drawing to which the collar part of the endoscope was expanded in the endoscope apparatus of the 2nd Embodiment of this invention. In the endoscope apparatus of the 2nd Embodiment of this invention, it is an exploded view of the collar part of an endoscope. It is the perspective view which expanded the collar part of the endoscope in the endoscope apparatus of the 1st modification of the 2nd Embodiment of this invention. In the endoscope apparatus of the 1st modification of the 2nd Embodiment of this invention, it is an exploded view of the collar part of an endoscope. It is the perspective view which expanded the collar part of the endoscope in the endoscope apparatus of the 2nd modification of the 2nd Embodiment of this invention. In the endoscope apparatus of the 2nd modification of the 2nd Embodiment of this invention, it is an exploded view of the collar part of an endoscope. It is the perspective view which expanded the collar part of the endoscope in the endoscope apparatus of the 3rd Embodiment of this invention. It is sectional drawing to which the collar part of the endoscope was expanded in the endoscope apparatus of the 3rd Embodiment of this invention. In the endoscope apparatus of the 3rd Embodiment of this invention, it is an exploded view of the collar part of an endoscope. In the endoscope apparatus of the 3rd Embodiment of this invention, it is detail drawing of the hood which comprises a collar part. In the endoscope apparatus of the 4th Embodiment of this invention, it is the perspective view which expanded the collar part of the endoscope. It is a whole block diagram which shows the endoscope apparatus of the 5th Embodiment of this invention. It is a whole block diagram which shows the endoscope apparatus of the modification of the 5th Embodiment of this invention. It is a whole block diagram which shows the endoscope apparatus of the 6th Embodiment of this invention. It is sectional drawing to which the tube side collar part was expanded in the endoscope apparatus of the 6th Embodiment of this invention. In the endoscope apparatus of the 6th Embodiment of this invention, it is an exploded view of a tube side collar part. It is the perspective view which expanded the collar part of the endoscope in the endoscope apparatus of the 7th Embodiment of this invention. It is sectional drawing to which the collar part of the endoscope was expanded in the endoscope apparatus of the 7th Embodiment of this invention.

Explanation of symbols

1, 120, 130, 140 Endoscopic device 2, 30, 40, 50, 60, 70, 80, 90, 100, 110, 121, 131, 150 Endoscope 4 Fluid ejecting means (first fluid ejecting means )
20 observation means 21, 111 distal end 21c proximal end 22, 112, 122 insertion part 25, 31, 41, 51, 61, 71, 81, 91, 101, 115, 151, 152, 153, 154 collar 26, 32 42, 52, 62, 73, 82, 92, 103, 145, 151a, 152a, 153a, 154a Hood 26a, 32b, 42a, 52a, 62b, 73a, 82a, 92a, 103a Insertion hole 27, 72, 102 Stop member 27a, 72a, 102a Through hole 27b Cut 28 Fixing member 113 Main body 114 Adapter 123 Guide tube 141 First fluid ejecting means 142 Second fluid ejecting means 143 Tube side flange A, A1, A2 Compressed air (fluid )
S subject

Claims (13)

A distal end portion having an observation means capable of observing the subject, and an endoscope including an insertion portion extending from the distal end portion to the proximal end side and having flexibility and bendable according to the subject;
First fluid ejecting means for ejecting fluid from the proximal end side to the distal end side of the endoscope,
The endoscope apparatus according to claim 1, wherein the distal end portion or the insertion portion of the endoscope is provided with a flange portion projecting to the outer periphery. The endoscope apparatus according to claim 1, wherein
The endoscope apparatus according to claim 1, wherein the collar portion of the endoscope is detachably attached to the distal end portion or the insertion portion. The endoscope apparatus according to claim 1, wherein
An endoscope apparatus, wherein an outer diameter of the insertion portion of the endoscope is set smaller than an outer diameter of the distal end portion. The endoscope apparatus according to claim 3, wherein
The flange portion of the endoscope has a distal end at a proximal end of the distal end portion in which an insertion hole is formed and the distal end portion or the insertion portion is inserted and an outer diameter increases from the insertion portion to the distal end portion. An endoscope apparatus comprising a hood locked to a side. The endoscope apparatus according to claim 4, wherein
The collar portion of the endoscope includes a locking member that is locked to the proximal end of the distal end portion in a state of being fitted to the insertion portion on a distal end side than the hood.
An endoscope apparatus, wherein an inner diameter of the insertion hole of the hood is set to be larger than an outer diameter of the distal end portion and smaller than an outer diameter of the locking member. The endoscope apparatus according to claim 5, wherein
The collar portion of the endoscope includes a fixing member that is externally fitted to the insertion portion on the proximal side of the hood, and the hood is sandwiched between the locking member and the fixing member. An endoscope apparatus characterized by that. The endoscope apparatus according to claim 4, wherein
The collar portion of the endoscope includes a locking member locked to the proximal end of the distal end portion in a state of being fitted on the distal end portion or the insertion portion,
An endoscope apparatus, wherein the hood has an inner diameter of the insertion hole set to be larger than an outer diameter of the distal end portion, and is externally fixed to the locking member through the insertion hole. In the endoscope apparatus according to claim 5-7,
The locking member of the flange has a notch reaching from the outer periphery to a through hole through which the insertion portion is inserted, and the distal end portion or the insertion portion can be elastically deformed from the notch to the through hole in a removable manner. An endoscopic device characterized by the above. The endoscope apparatus according to any one of claims 1 to 4,
The distal end portion of the endoscope includes a main body portion provided at the distal end of the insertion portion, and an adapter provided detachably on the main body portion,
The endoscope apparatus according to claim 1, wherein the collar is provided on the adapter. The endoscope apparatus according to any one of claims 1 to 3,
2. An endoscope apparatus according to claim 1, wherein a plurality of the flange portions of the endoscope are provided at the distal end portion or the insertion portion. The endoscope apparatus according to claim 10, wherein
The endoscope apparatus according to claim 1, wherein the plurality of flanges of the endoscope are set so that an outer diameter is gradually reduced from a distal end side to a proximal end side. The endoscope apparatus according to any one of claims 1 to 11,
It is substantially tubular and includes a guide tube disposed on the outer periphery of the insertion portion on the base end side of the flange portion,
The endoscope apparatus according to claim 1, wherein the fluid ejected from the first fluid ejecting means is supplied from the proximal end side of the guide tube to the distal end side through the inside. The endoscope apparatus according to claim 12, wherein
A second fluid ejecting means for ejecting a fluid from the proximal end side to the distal end side of the guide tube outside the guide tube;
An endoscope apparatus according to claim 1, wherein the guide tube is provided with a tube side flange projecting to the outer periphery.

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