JP5296605B2 - Structure for preventing opening and closing of expansion / contraction member, endoscope having the same, and insertion aid - Google Patents

Description

  The present invention relates to a structure for preventing the opening and closing of an expansion and contraction member, an endoscope having the structure, and an insertion assisting tool, and more particularly, an endoscope and an insertion assist for assisting insertion of an endoscope into a body. The present invention relates to a technique for controlling a balloon (expansion and contraction member) provided on a tool.

  Conventionally, insertion of an endoscope into the large intestine is very difficult because the large intestine has a tortuous structure in the body and there is a portion that is not fixed to the body cavity. Therefore, a lot of experience is required to learn the insertion technique, and if the insertion technique is inexperienced, this results in great pain for the patient.

  Therefore, in order to assist the insertion of the endoscope into the body, an endoscope and an insertion aid using a balloon (expansion and contraction member) have been developed. For example, from the viewpoint of fixing an endoscope insertion portion to be inserted into a body cavity or an insertion assisting tool for inserting and guiding the endoscope insertion portion into the body cavity, it is expanded by air supply (supply) and exhausted (suction) 2. Description of the Related Art There is known a balloon-equipped endoscope in which a balloon that contracts due to the above is provided in an endoscope insertion portion or an insertion aid.

  An endoscope or an insertion assisting tool attached with a balloon is provided with an opening for air supply / suction to the balloon in order to inflate / deflate the balloon. Here, when the balloon is deflated, the balloon may block the opening in some cases. If the opening is blocked, the balloon cannot be further deflated.

  Accordingly, for example, a balloon operating device for an insertion instrument in which a fluid passage provided in the insertion portion is opened on the outer peripheral surface of the insertion portion covered with a balloon and a groove communicating with the fluid passage is formed. Is known (see, for example, Patent Document 1).

  In addition, for example, a fluid supply / suction port and a fluid supply / suction port communicate with a bulge portion coated with an adhesive for connecting the outer tube constituting the bending portion at the distal end of the endoscope insertion portion and the distal end hard portion. A balloon-type endoscope in which a groove is formed is known (see, for example, Patent Document 2).

Japanese Utility Model Publication No. 62-186701 JP 2004-329645 A

  However, in the thing of the said patent document 1, in order to provide a groove | channel, it is necessary to give thickness to the outer surface of an endoscope, and there exists a problem that an endoscope will become thick. Moreover, in the thing of the said patent document 2, since the groove part was originally formed using the thick part of an endoscope, although an endoscope does not become thick, the position which attaches a balloon is There is a problem that it is limited to a thick portion where the adhesive is molded.

  The present invention has been made in view of such circumstances, and the expansion / contraction member is contracted without thickening an endoscope or the like to which the expansion / contraction member is attached and without limiting the attachment position of the expansion / contraction member. Structure for preventing the opening and closing of the expansion / contraction member during contraction, and the inside view having the same can be prevented from being blocked by the expansion / contraction member. An object is to provide a mirror and an insertion aid.

In order to achieve the above-mentioned object, the present invention is formed so as to be included in the surface of a member to which an expansion / contraction member that expands / contracts by supplying or sucking a fluid to / from the inside is attached to the surface of the member. An opening when the expansion / contraction member is contracted to prevent the expansion / contraction member from closing when the expansion / contraction member contracts an opening for supplying or sucking fluid to the expansion / contraction member. A member to which the expansion / contraction member is attached is any of an endoscope, an endoscope insertion aid, and an expansion / contraction member unit attached to the endoscope; A convex portion is provided in the vicinity of the opening on the surface of the member to which the expansion / contraction member is attached, and the convex portion is formed around the opening and part of the bank is not continuous. Convex part, front That is substantially parallel to a position facing each other across the opening to provide a systolic outlet obstruction preventing structure of inflation and deflation member, wherein.

  Thus, when the expansion / contraction member is contracted, the fluid injection / suction opening to the expansion / contraction member can be prevented from being blocked by the expansion / contraction member, and the endoscope to which the expansion / contraction member is attached And the attachment position of the expansion / contraction member is not limited.

Further, the present invention relates to the expansion / contraction member formed to be included in the expansion / contraction member on the surface of the member to which the expansion / contraction member that expands / contracts by supplying or sucking a fluid to / from the inside is attached. The expansion / shrinkage member is prevented from closing when the expansion / contraction member contracts the opening for supplying or sucking fluid to the expansion / contraction member when the expansion / contraction member is contracted. The member to which the expansion / contraction member is attached is one of an endoscope, an endoscope insertion aid, and an expansion / contraction member unit attached to the endoscope, and the expansion / contraction member is attached. in the vicinity of the opening of the are member surface, the convex portion is provided, the protruding portion is characterized in that at least one or more formed protruding convex portion around the opening expansion Shrinkage Providing outlet obstruction prevention structure when.

  Thus, various modes are possible for the shape and arrangement of the convex portion as the structure for preventing the opening portion from closing when the expansion / contraction member is contracted.

Similarly, in order to achieve the above object , the present invention includes the expansion / contraction member on the surface of a member to which an expansion / contraction member that expands / contracts by supplying or sucking fluid to / from the inside is attached. An expansion / contraction member for preventing the expansion / contraction member from closing the opening for supplying or sucking fluid to the expansion / contraction member formed so as to contract the expansion / contraction member In the contraction preventing structure of the opening when contracting, the member to which the expansion / contraction member is attached is any of an endoscope, an insertion aid for endoscope, and an expansion / contraction member unit attached to the endoscope A plurality of projecting convex portions are provided on the inner wall of the expansion / contraction member, and the plurality of convex portions are member surfaces to which the expansion / contraction member is attached in a state where the expansion / contraction member is contracted The opening of To provide a systolic outlet obstruction preventing structure of inflation and deflation member, characterized in that formed on the position corresponding to the peripheral part.

  As described above, the opening / closing blockage prevention structure of the expansion / contraction member may be provided on the expansion / contraction member side.

Similarly, in order to achieve the above object, the present invention supplies or sucks fluid from an opening provided in the outer peripheral surface to an expansion / contraction member attached to cover the outer peripheral surface of the distal end of the insertion portion. it makes the endoscope for expanding and contracting the expansion and contraction member, to provide an endoscope, characterized in that the shrinkage upon opening closure structure for preventing the inflating and deflating member provided in the vicinity of the opening .

Similarly, in order to achieve the above object, the present invention supplies or sucks fluid from an opening provided in the outer peripheral surface to an expansion / contraction member attached to cover the outer peripheral surface of the distal end of the insertion portion. Thus, the endoscope expands and contracts the expansion / contraction member, wherein a plurality of protrusions are provided on an inner wall of the expansion / contraction member, and the plurality of protrusions are the expansion / contraction member. An endoscope is provided, wherein the endoscope is formed at a position corresponding to the periphery of the opening on the surface of the endoscope to which the expansion / contraction member is attached .

Similarly, in order to achieve the above object, the present invention supplies or sucks fluid from an opening provided on the outer peripheral surface to an expansion / contraction member attached to cover the outer peripheral surface of the tip portion. by the an endoscope insertion aid expansion and contraction member is expanded and contracted, among which is characterized by a systolic outlet obstruction preventing structure of the inflation and deflation member provided in the vicinity of the opening An endoscope insertion aid is provided.

Similarly, in order to achieve the above object, the present invention supplies and sucks a fluid from an opening provided on the outer peripheral surface to an expansion / contraction member attached to cover the outer peripheral surface. An expansion / contraction member unit for expanding / contracting the expansion / contraction member, wherein the expansion / contraction member unit includes the above-described structure for preventing the opening / closing of the expansion / contraction member from being closed in the vicinity of the opening. .

  As described above, as the member for attaching the expansion / contraction member, an endoscope, an endoscope insertion aid, an expansion / contraction member unit, and the like can be considered. By providing the expansion / contraction member, it is possible to prevent the fluid injection / suction opening of the expansion / contraction member from being blocked by the expansion / contraction member when the expansion / contraction member is contracted. The attachment position of the expansion / contraction member is not limited without thickening the endoscope or the like.

  As described above, according to the present invention, when the expansion / contraction member is contracted, the fluid supply / suction opening to the expansion / contraction member can be prevented from being blocked by the expansion / contraction member. The endoscope and the like to which the expansion / contraction member is attached are not made thick, and the attachment position of the expansion / contraction member is not limited.

1 is a schematic configuration diagram showing an embodiment of an electronic endoscope to which a fluid control device according to the present invention is applied. It is a schematic block diagram of the balloon control apparatus which controls the pressure of a balloon. (A) is a longitudinal cross-sectional view which expands and shows the insertion part of an endoscope, (b) is an enlarged view which expands and further shows the part of the circle A of the broken line in Fig.3 (a). (A)-(f) is explanatory drawing which shows the example of a convex part. It is a longitudinal cross-sectional view which shows the example which attached the balloon to the front-end | tip of the insertion assistance tool for endoscopes. (A) is an enlarged vertical sectional view showing a state in which the balloon unit is mounted on the endoscope insertion portion, and (b) further enlarges the vicinity of the opening indicated by a broken-line circle B in FIG. 6 (a). FIG. (A) is an enlarged view of the vicinity of the opening to which the air supply / exhaust pipe is connected, (b) is a plan view of the opening viewed from above, and (c) is the same as (a). It is an enlarged view near the opening part to which is connected.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS With reference to the accompanying drawings, a detailed description will be given below of a structure for preventing the opening portion from closing when an expansion / contraction member is contracted, an endoscope having the structure, and an insertion aid.

  FIG. 1 is a schematic configuration diagram showing an embodiment of an electronic endoscope to which the structure for preventing the closing of an opening during contraction of an expansion / contraction member according to the present invention is applied.

  In FIG. 1, the electronic endoscope 2 includes an insertion unit 10 that is inserted into a subject, and an operation unit 11 that is connected to a proximal end portion of the insertion unit 10. Although not shown in the drawings, the distal end portion 10a connected to the distal end of the insertion portion 10 incorporates an objective lens for capturing image light of an observation site in the subject and an imaging device for capturing the image light. ing. The image in the subject acquired by the imaging device is displayed as an endoscopic image on the monitor of the processor device connected to the cord 12, although not shown.

  In addition, the distal end portion 10a is operated with an illumination window for irradiating the observation site with illumination light from a light source device (not shown), a forceps outlet communicating with the forceps port 13, and an air / water feed button 11a. Thus, a cleaning water for removing dirt on the observation window for protecting the objective lens, a nozzle for jetting air, and the like are provided.

  A bending portion 10b connecting a plurality of bending pieces is provided behind the tip portion 10a. The bending portion 10b is bent in the vertical and horizontal directions when the angle knob 11b provided in the operation portion 11 is operated and the wire inserted in the insertion portion 10 is pushed and pulled. Thereby, the front-end | tip part 10a is orient | assigned to the desired direction in a subject.

  A flexible portion 10c having flexibility is provided behind the curved portion 10b. The flexible portion 10c is several in order to maintain the distance from the patient so that the distal end portion 10a can reach the observation site and does not hinder the operator from gripping and operating the operation portion 11. having a length of m.

  Between the distal end portion 10a and the bending portion 10b, a balloon (expansion / contraction member) 14 is formed on the entire circumference in the circumferential direction of the insertion portion 10. The balloon 14 is made of an expandable / shrinkable material, such as latex rubber, which expands and contracts by supplying and sucking a fluid such as gas.

  The balloon 14 may be axisymmetric as a uniform shape in the circumferential direction of the insertion portion 10, or may not be uniform in the circumferential direction and may not be axisymmetric.

  FIG. 2 is a schematic configuration diagram of the balloon control device 18 that controls the pressure of the balloon 14.

  As shown in FIG. 2, in order to adjust the internal pressure of the balloon 14, a positive pressure pump (infusion pump) 34 and a negative pressure pump (suction pump) are connected from the valve opening / closing control unit 30 and the pressure control unit 32 through the air supply / exhaust pipe 20. ) 36 is connected. When the balloon 14 is inflated / deflated, the valve opening / closing controller 30 controls the opening / closing of the valve connected to the balloon 14, and the pressure controller 32 controls the negative pressure pump (suction pump) 36 and the positive pressure pump (infusion pump) 34. Is to be controlled.

  FIG. 3 shows an enlarged view of the insertion portion 10 of the electronic endoscope 2. FIG. 3A is a longitudinal sectional view showing the insertion portion 10 in an enlarged manner, and FIG. 3B is an enlarged view showing the portion of a broken circle A in FIG. 3A further enlarged.

  As shown in FIG. 3A, a balloon 14 is attached between the distal end portion 10 a and the bending portion 10 b of the insertion portion 10 so as to cover the periphery of the insertion portion 10. Inside the insertion portion 10, a feed / exhaust pipe 20 for supplying and sucking fluid (for example, gas) to the balloon 14 is provided. An opening 22 is provided at the distal end of the air supply / exhaust pipe 20, from which gas is supplied into the balloon 14, and gas is sucked into the balloon 14 from here. FIG. 3A shows a state where gas is supplied into the balloon 14 and the balloon 14 is inflated.

  FIG. 3B shows an enlarged view of the vicinity of the opening 22 provided in the endoscope outer skin (endoscope main body) 2a of the distal end portion 10a.

  As shown in FIG. 3B, a convex portion 24 is formed on the endoscope outer skin 2a in the balloon 14 in the vicinity of the opening 22 to which the air supply / exhaust pipe 20 for supplying gas into the balloon 14 is connected. Is formed.

  By forming the convex portion 24 in the vicinity of the opening 22 in this way, when the gas in the balloon 14 is sucked from the opening 22 and the balloon 14 is deflated, the balloon 14 is gradually deflated and the inside thereof opens. Even if it comes into contact with the portion 22, there is no gap due to the convex portion 24, and the opening 22 is not blocked by the inside of the balloon 14.

  Thus, the convex part 24 formed in the vicinity of the opening part 22 forms the opening part obstruction | occlusion prevention structure at the time of shrinkage | contraction of an expansion / contraction member.

  Further, at this time, since the convex portion 24 is provided on the endoscope outer skin 2a, it is not necessary to increase the outer diameter of the electronic endoscope 2, and the place where the opening 22 and the convex portion 24 are installed is also particularly limited. Not.

  The shape of such a convex part 24 is not specifically limited. The example of the convex part 24 is shown to Fig.4 (a)-(f).

  FIGS. 4A to 4F are views of the opening 22 of the insertion portion 10 of FIG. 3A as viewed from above. However, the balloon 14 is omitted.

  First, what is shown in FIG. 4A is convex portions 24 a formed in a bank shape so as to surround the outer periphery of the insertion portion 10 on both sides in the axial direction of the insertion portion 10 of the opening 22. The opening 22 is surrounded by bank-like convex portions 24 a formed on both sides of the opening 22. The convex portion 24a can be easily formed by forming the convex portion 24a once.

  What is shown in FIG. 4B is a convex portion 24b in which a bank is formed in a U-shape (U-shape) so as to surround three directions of the periphery of the opening 22 and open one direction.

  What is shown in FIG. 4C is a convex portion 24 c formed as a bank that completely surrounds the periphery of the opening 22 on the outer surface of the insertion portion 10.

  FIG. 4D shows convex portions 24 d in which a bank having a predetermined length extending in the axial direction of the insertion portion 10 is formed on both sides of the opening portion 22 in the circumferential direction of the insertion portion 10.

  4 (e) is a convex portion 24e in which a bank having a predetermined length extending in the circumferential direction of the insertion portion 10 is formed on both sides of the opening portion 22 in the axial direction of the insertion portion 10. FIG.

  That is, the combination of the convex portion 24d and the convex portion 24e is the convex portion 24c.

  Also, what is shown in FIG. 4 (f) is a convex portion 24 f in which a plurality of dot-like projections are formed around the opening 22 on the outer surface of the insertion portion 10. In the example shown in FIG. 4 (f), four protruding convex portions 24 f are formed around the opening 22, but the number of convex portions 24 f formed around the opening 22 is not particularly limited. For example, it may be one.

  In addition, the shape of the convex part 24 is not limited to what was shown here. For example, in the example shown in FIG. 4A, only one bank may be used to surround the outer periphery of the insertion portion 10 formed on both sides of the opening 22. Also in FIGS. 4D and 4E, only one bank may be formed on both sides of the opening 22. Moreover, in FIG.4 (c), you may make it open by notching a part of the bank which completely surrounds the circumference | surroundings of the opening part 22, for example, four corners.

  Moreover, as shown in FIG.3 (b), although the cross section of the convex part 24 has preferable circular shape, it is not limited to circular, Arbitrary cross-sectional shapes may be sufficient.

  Moreover, since this convex part 24 is the objective of preventing that the opening part 22 is obstruct | occluded by the balloon 14, in order to acquire the effect, it is from the edge of the opening part 22 to the end of each convex part 24. It is desirable that the distance is within 5 mm. Moreover, the height of the convex part 24 is preferably about 0.5 mm, for example.

  As described above, in the present embodiment, the convex portion 24 is provided in the vicinity of the opening portion 22 provided in the insertion portion 10 of the electronic endoscope 2 for supplying and exhausting gas to the balloon 14, and the balloon 14 is contracted. Sometimes, even if the inside of the balloon 14 hits the opening 22, a gap is generated to prevent the opening 22 from being blocked.

  In addition, by providing a plurality of protrusions on the inner wall of the balloon 14 instead of around the opening 22 of the insertion part 10, the protrusions provided on the inner wall of the balloon 14 are inserted when the balloon 14 is deflated. An equivalent effect can be achieved by generating a gap by hitting the periphery of the opening 22 of the portion 10 so that the opening 22 is not blocked.

  Although the example demonstrated above was what attached the balloon 14 to the endoscope main body (insertion part 10), the place which attaches a balloon is not limited to an endoscope main body.

  FIG. 5 shows an example in which a balloon is attached to the distal end of the endoscope insertion aid.

  As shown in FIG. 5, a balloon 42 is attached to the distal end portion of an endoscope insertion aid (overtube) 40.

  The endoscope insertion assisting tool 40 is made of, for example, a flexible material such as polyurethane, and is formed in a cylindrical shape, into which the insertion portion 10 of the endoscope is inserted. An inflatable balloon 42 is attached to the outer periphery of the distal end portion of the endoscope insertion aid 40. The balloon 42 is supplied and sucked with gas from an air supply / exhaust pipe 44 formed in the endoscope insertion aid 40.

  Then, in the opening 46 for supplying and sucking the gas from the air supply / exhaust pipe 44 to the balloon 42, a convex portion as shown in FIG. 3B or FIGS. 4A to 4F (in FIG. 5). (Not shown).

  As a result, the balloon 42 attached to the outer periphery of the distal end portion of the endoscope insertion assisting tool 40 is prevented from blocking the opening 46 by the inner wall of the balloon 42 when the balloon 42 is deflated, as in the above example. can do.

  Next, FIG. 6 shows an example in which a balloon is attached to an endoscope as a balloon unit (expansion / contraction member unit).

  FIG. 6A is an enlarged longitudinal sectional view showing a state where the balloon unit is mounted on the endoscope insertion portion, and FIG. 6B shows the vicinity of the opening indicated by a broken-line circle B in FIG. 6A. It is sectional drawing expanded further.

  As shown in FIG. 6A, the balloon unit 50 includes a cylindrical elastic body 51 and a balloon 52 attached thereto, and is attached to the insertion portion 10 of the endoscope.

  An air supply / exhaust tube 53 is formed in the insertion portion 10, and the air supply / exhaust tube 53 communicates with an opening 54 formed in the insertion portion 10 (endoscope main body), and gas flows from the opening 54 to the balloon 52. Supply and suction.

  As shown in FIG. 6B, the insertion portion 10 of the endoscope is fitted into the cylindrical elastic body 51 of the balloon unit 50, and the outer skin 10d of the insertion portion 10 and the inner surface of the cylindrical elastic body 51 are in close contact with each other. Yes. An opening 54 is formed in the outer skin 10 d (endoscope body) of the insertion portion 10, and an opening 51 a is also formed in the cylindrical elastic body 51 at a position corresponding to the opening 54.

  A convex portion 56 is formed in the vicinity of the opening 51 a of the cylindrical elastic body 51. The convex portion 56 is the same as that shown in FIG. 3B or FIG. 4 described above. By forming the convex portion 56, it is possible to prevent the inner surface of the balloon 52 from blocking the opening 51a (or the opening 54) when the balloon 52 is deflated.

  6B, a tapered shape 51b is formed on the inner surface of the opening 51a of the cylindrical elastic body 51 so that the inner diameter of the opening 51a increases toward the outer skin 10d of the insertion portion 10. ing.

  The tapered shape 51b provided inside the opening 51a is formed in the opening 54 formed in the insertion portion 10 and the cylindrical elastic body 51 when the balloon unit 50 is attached to the insertion portion 10 of the endoscope. This is for facilitating alignment with the opening 51a.

  In the example described above, a bank-like convex portion that is continuous or not continuous in the vicinity of the opening for sending and exhausting gas into the balloon of the endoscope main body or endoscope insertion tool or balloon unit, Alternatively, by forming a protruding convex portion, the inner surface of the balloon is prevented from closing the opening when the balloon is deflated.

  As described above, in the present embodiment, a groove (a continuous or non-continuous bank-shaped protrusion or a protrusion-shaped protrusion) is formed instead of providing a groove in the vicinity of the opening as in the prior art. As a result, the outer diameter of the endoscope and the insertion aid does not increase. In addition, since the groove is not provided as in the conventional case, the installation location of the convex portion including the installation position of the opening portion is not particularly limited as long as it is a portion having a thick outer diameter as in the conventional case. The degree of freedom of installation location has become wider.

  In addition, as a method for preventing the inner surface of the balloon from closing the opening when the balloon is deflated, a ceiling having a large number of holes is provided in the portion corresponding to the opening of the endoscope insertion aid or the balloon unit. You may make it form the chamber which has the ceiling formed with the chamber or the porous member.

  This will be described below.

  FIG. 7A is an enlarged view of a portion corresponding to a broken-line circle B in FIG.

  However, here, unlike the case of FIG. 6, no protrusion is formed in the vicinity of the opening 54. Instead, in the example shown in FIG. 7A, a chamber 60 is formed in a portion of the cylindrical elastic body 51 corresponding to the opening 54 formed in the outer skin 10d of the insertion portion 10 of the endoscope. A large number of holes 62 are formed in the ceiling of the chamber 60.

  FIG. 7B shows a plan view of FIG. 7A viewed from above. 7B, the chamber 60 is formed over the entire circumference of the cylindrical elastic body 51, and a large number of holes 62 are formed on the entire surface of the portion where the chamber 60 is formed. .

  When the balloon 52 is deflated, the gas in the balloon 52 is sucked through the numerous holes 62. As a result, even if the balloon 52 is deflated and the inner surface of the balloon 52 approaches the numerous holes 62, the entire balloon 52 is not deflated uniformly, so that the inner surface of the balloon 52 is covered by the holes 62. However, all the holes 62 are not blocked.

  Therefore, even with such a configuration, the opening 54 can be prevented from being blocked when the balloon 52 is deflated.

  Moreover, as shown in FIG.7 (c), instead of opening many holes in the ceiling of the chamber 60, even if the ceiling itself is formed of the porous member 64, the gas passes through the porous member 64. The same effect can be exhibited.

  Further, as shown in FIG. 5, a portion corresponding to the opening 46 of the endoscope insertion assisting tool 40 has a chamber having a ceiling in which a large number of holes are formed as in the above, or a porous member. You may make it form the chamber which has the formed ceiling.

  In the example described above, in the endoscope, the endoscope insertion aid, the balloon unit, or the like, a convex portion (expanded / contracted) is provided so that the balloon does not block the opening that is the fluid suction port when the balloon is deflated. However, the member provided with the structure for preventing the opening and closing of the expansion / contraction member is not limited to these examples.

  The structure for preventing the closing of the opening of the expansion / contraction member of the present invention can be applied to various devices having a mechanism for supplying / suctioning fluid to / from the expansion / contraction member through expansion / contraction. .

  As mentioned above, although the opening part obstruction | occlusion prevention structure at the time of shrinkage | contraction of the expansion / contraction member of this invention, the endoscope which has this, and the insertion auxiliary tool were demonstrated in detail, this invention is not limited to the above example, This invention is not limited. Of course, various improvements and modifications may be made without departing from the scope of the invention.

  2 ... Electronic endoscope, 10 ... insertion portion, 10a ... tip portion, 10b ... curved portion, 10c ... soft portion, 10d ... outer skin (of the insertion portion), 11 ... operation portion, 11a ... air / water supply button, 11b DESCRIPTION OF SYMBOLS ... Angle knob, 12 ... Cord, 13 ... Forceps port, 14 ... Balloon, 18 ... Balloon control device, 20 ... Air supply / exhaust pipe, 22 ... Opening part, 24 ... Convex part, 30 ... Valve opening / closing control part, 32 ... Pressure control 34, positive pressure pump, 36 ... negative pressure pump, 40 ... endoscope insertion aid (over tube), 42 ... balloon, 44 ... air supply / exhaust pipe, 46 ... opening, 50 ... balloon unit, 51 ... Cylindrical elastic body, 51a ... opening, 51b ... tapered shape, 52 ... balloon, 54 ... opening, 56 ... convex, 60 ... chamber, 62 ... hole, 64 ... porous member

Claims (7)

Fluid is supplied to the expansion / contraction member formed so as to be included in the expansion / contraction member on the surface of the member to which the expansion / contraction member that is inflated / contracted by supplying or sucking fluid to / from the inside is attached. Alternatively, the expansion and contraction member is prevented from closing when the expansion and contraction member is closed when the expansion and contraction member is contracted.
The member to which the expansion / contraction member is attached is any of an endoscope, an endoscope insertion aid, and an expansion / contraction member unit attached to the endoscope,
Protrusions are provided in the vicinity of the opening on the member surface to which the expansion / contraction member is attached ,
The convex part is a bank-like convex part that is formed around the opening part and lacks a part thereof, and is formed substantially parallel to a position facing the opening part across the opening part. A structure for preventing the opening from closing when the expansion / contraction member is contracted. Fluid is supplied to the expansion / contraction member formed so as to be included in the expansion / contraction member on the surface of the member to which the expansion / contraction member that is inflated / contracted by supplying or sucking fluid to / from the inside is attached. Alternatively, the expansion and contraction member is prevented from closing when the expansion and contraction member is closed when the expansion and contraction member is contracted.
The member to which the expansion / contraction member is attached is any of an endoscope, an endoscope insertion aid, and an expansion / contraction member unit attached to the endoscope,
Protrusions are provided in the vicinity of the opening on the member surface to which the expansion / contraction member is attached,
The structure according to claim 1, wherein the protrusion is a protrusion-shaped protrusion formed at least one around the opening. Fluid is supplied to the expansion / contraction member formed so as to be included in the expansion / contraction member on the surface of the member to which the expansion / contraction member that is inflated / contracted by supplying or sucking fluid to / from the inside is attached. Alternatively, the expansion and contraction member is prevented from closing when the expansion and contraction member is closed when the expansion and contraction member is contracted.
The member to which the expansion / contraction member is attached is any of an endoscope, an endoscope insertion aid, and an expansion / contraction member unit attached to the endoscope,
A plurality of protrusions are provided on the inner wall of the expansion / contraction member ,
The plurality of convex portions are formed at positions where the expansion / contraction member contracts, and are formed at positions corresponding to the periphery of the opening on a member surface to which the expansion / contraction member is attached in a state where the expansion / contraction member is contracted. Blocking prevention structure. An endoscope that expands and contracts the expansion / contraction member by supplying or sucking fluid from an opening provided in the outer peripheral surface to an expansion / contraction member attached to cover the outer peripheral surface of the distal end of the insertion portion. There,
An endoscope comprising the opening-closing blockage prevention structure for an expansion / contraction member according to claim 1 or 2 in the vicinity of the opening. An endoscope that expands and contracts the expansion / contraction member by supplying or sucking fluid from an opening provided in the outer peripheral surface to an expansion / contraction member attached to cover the outer peripheral surface of the distal end of the insertion portion. There,
A plurality of protrusions are provided on the inner wall of the expansion / contraction member ,
The endoscope, wherein the plurality of convex portions are formed at positions corresponding to the periphery of the opening on an endoscope surface to which the expansion / contraction member is attached in a state where the expansion / contraction member is contracted . For an endoscope that expands and contracts the expansion / contraction member by supplying or sucking a fluid from an opening provided on the outer peripheral surface to an expansion / contraction member attached to cover the outer peripheral surface of the distal end portion An insertion aid,
An insertion assisting tool for an endoscope, comprising the opening closing blockage prevention structure for the expansion / contraction member according to claim 1 or 2 in the vicinity of the opening. An expansion / contraction member unit that expands / contracts the expansion / contraction member by supplying and sucking a fluid from an opening provided in the outer peripheral surface to an expansion / contraction member attached to cover the outer peripheral surface. ,
3. An expansion / contraction member unit comprising the expansion portion contraction preventing structure for an expansion / contraction member according to claim 1 or 2 in the vicinity of the opening portion.

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