JP2013085746A - Plug and endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a forceps plug capable of being attached to a cap twice, in a plug to be attached to a mouth such as a forceps mouth of an endoscope, and an endoscope with this plug.SOLUTION: In the plug, an insertion hole 32 for inserting a cap 20 is formed in a plug body 29 of the forceps plug 21. A first engaging claw 34 and a second engaging claw 36 are provided so as to follow the insertion direction of the cap 20 on the inner peripheral surface of the plug body 29. A first fragile portion 45 is formed between the first and second engaging claws 34 and 36 of the plug body 29. A second fragile portion 46 is formed on the depth of the insertion direction from the second engaging claw 36 of the plug body 29. When the plug body 29 is pulled to the front of the cap 20 after the first engaging claw 34 is engaged with a flange 25 of the cap 20, the first fragile portion 45 is broken so that the first engaging claw 34 is left on the cap 20 side. Since the second engaging claw 36 capable of being engaged with the flange 25 is left on the inner peripheral surface of the plug body 29a, the forceps plug 21 can be attached to the cap 20 again.

Description

  The present invention relates to a plug attached to a mouth portion such as a forceps port of an endoscope, and an endoscope including the plug.

  Conventionally, in the medical field, an insertion portion of an endoscope is inserted into the body of a subject, and various treatments are performed not only on the inside of the body but also on the observation site inside the body (see Patent Document 1). . Specifically, various treatment tools such as forceps and an incision tool are inserted into a forceps channel in the insertion portion from a forceps port provided in the operation portion and led out from a forceps outlet opening at the insertion portion tip, thereby observing the observation site Various treatments such as excision and sampling are performed.

  A cylindrical forceps plug into which the treatment tool can be inserted is attached to the forceps opening. This forceps plug prevents body fluid, dirt, air, etc. from leaking out of the forceps opening due to changes in internal pressure of the body. A slit into which the treatment tool can be inserted is formed inside the forceps plug. The slit prevents leakage of bodily fluids and the like from the forceps opening by bringing the slit edge into close contact with the treatment instrument when the treatment instrument is inserted. As such forceps plug, since a body fluid or the like adheres due to use, a disposable type that cannot be reused is generally used so that it is replaced with a new one for each use from the viewpoint of infection prevention.

  Patent Documents 2 and 3 disclose forceps plugs that can be removed from the forceps base by breaking a part of the plug body. Patent Document 4 discloses a forceps plug that includes a plug main body and an engaging portion that engages with a forceps opening, and has a notch formed therebetween. The forceps plug cannot be reused because the plug body and the engaging portion are broken by a pulling operation on the plug body. The forceps plugs of Patent Documents 2 to 4 are not reusable because they are broken when removed from the forceps opening. As a result, the used forceps stopper is prevented from being reused by mistake.

JP 2008-036426 A JP 2008-043774 A JP 2006-346197 A JP 2006-055446 A

  The size of the diameter of the treatment tool may change if the type is different. For this reason, there are a plurality of types of forceps plugs with different slit sizes depending on the diameter of the treatment instrument to be used. Accordingly, a forceps plug of a type corresponding to the treatment tool to be used is attached to the forceps opening. At this time, since the various forceps plugs have similar appearances, there is a possibility that another type of forceps plug may be mistakenly attached to the forceps opening. In such a case, since the forceps plugs of Patent Documents 2 to 4 are destroyed when they are removed from the forceps opening, they cannot be reattached to the forceps opening even if they are unused. As a result, unused forceps plugs must be discarded, and the forceps plug is wasted.

  In some cases, observation and treatment are performed on a single subject using a plurality of endoscopes having different outer diameters of the insertion portion (diameter of the forceps channel) and different lengths of the insertion portion. In such a case, it is desired to reuse the forceps stopper once removed from the forceps opening. However, the forceps stoppers of Patent Documents 2 to 4 are destroyed when the forceps stopper is removed from the forceps opening. For this reason, it is necessary to use a new forceps plug.

  An object of the present invention is to provide an endoscope plug that does not become unusable due to at least one mounting mistake or the like, and an endoscope including the same.

  In order to achieve the above object, the endoscope plug of the present invention is attached to a substantially cylindrical mouth provided in the endoscope so as to communicate with a channel inserted into the endoscope. In the stopper, a cylindrical stopper body having an insertion hole into which the mouth portion is inserted, and an outer peripheral surface of the mouth portion provided on the inner peripheral surface of the stopper body and inserted into the insertion hole. A first engaging portion to be joined, and formed on the plug body so as to be located on the back side in the insertion direction of the mouth portion with respect to the first engaging portion, and the first engaging portion and the mouth portion From the first fragile portion, the first fragile portion that breaks so that the first engagement portion is separated from the plug main body when the plug body is pulled toward the front side of the mouth portion after the engagement. Is also provided on the inner peripheral surface of the plug body so as to be located on the back side in the insertion direction, and the front side after the first fragile portion is broken. A second engagement portion that engages with the outer peripheral surface of the mouth portion inserted into the insertion hole; and a second engagement portion that is formed on the plug main body so as to be located on the back side in the insertion direction with respect to the second engagement portion. A fragile portion having a higher strength than the first fragile portion, and when the plug body is pulled after the second engagement portion and the mouth portion are engaged, the second portion A second fragile portion that breaks so that the engaging portion is separated from the plug body.

  The first fragile portion is formed by an annular inner circumferential groove provided on the inner circumferential surface of the stopper main body and an annular outer circumferential groove provided on the outer circumferential surface of the stopper main body. The part is preferably formed by an annular outer peripheral groove provided on the outer peripheral surface of the stopper main body.

  The endoscope plug according to the present invention is a plug attached to a substantially cylindrical mouth portion provided in the endoscope so as to communicate with a channel inserted into the endoscope. A cylindrical plug main body having an insertion hole into which the portion is inserted, and a first engagement provided on the inner peripheral surface of the plug main body and engaging with the outer peripheral surface of the mouth portion inserted into the insertion hole The plug body is formed on the plug body so as to be located on the back side in the insertion direction of the mouth portion with respect to the first engaging portion, and the plug after the engagement of the first engaging portion and the mouth portion. When the main body is pulled toward the front side of the mouth, the first engaging portion is ruptured so as to be separated from the plug main body, and is located on the far side in the insertion direction from the weak portion. Of the mouth portion inserted into the insertion hole after the fragile portion is broken. A second engagement portion that engages with a peripheral surface, and at least a part of the second engagement portion is formed so that the strength is lower than that of the plug body, and the second engagement The portion is destroyed when the stopper body is pulled after the engagement with the outer peripheral surface of the mouth portion.

  It is preferable that at least a part of the second engagement portion is formed of a material having a lower strength than the plug body.

  The endoscope plug according to the present invention is a plug attached to a substantially cylindrical mouth portion provided in the endoscope so as to communicate with a channel inserted into the endoscope. A cylindrical plug main body having an insertion hole into which the portion is inserted, and a first engagement provided on the inner peripheral surface of the plug main body and engaging with the outer peripheral surface of the mouth portion inserted into the insertion hole The plug body is formed on the plug body so as to be located on the back side in the insertion direction of the mouth portion with respect to the first engaging portion, and the plug after the engagement of the first engaging portion and the mouth portion. When the main body is pulled toward the front side of the mouth, the first engaging portion is ruptured so as to be separated from the plug main body, and is located on the far side in the insertion direction from the weak portion. Of the mouth portion inserted into the insertion hole after the fragile portion is broken. A second engaging portion that engages with the peripheral surface, and is destroyed when receiving a breaking operation for releasing the engagement with the outer peripheral surface. To do.

  It is preferable that at least a part of the second engagement portion is separable from the plug main body, and at least a part of the second engagement portion is separated from the plug main body when subjected to the breaking operation.

  The endoscope plug according to the present invention is a plug attached to a substantially cylindrical mouth portion provided in the endoscope so as to communicate with a channel inserted into the endoscope. A cylindrical plug main body having an insertion hole into which the portion is inserted, and a first engagement provided on the inner peripheral surface of the plug main body and engaging with the outer peripheral surface of the mouth portion inserted into the insertion hole A first engaging portion that is broken when receiving a breaking operation for releasing engagement with the outer peripheral surface; and a depth in the insertion direction of the mouth portion from the first engaging portion. A fragile portion formed in the plug body so as to be positioned on the side, the fragile portion breakable so that the first engagement portion broken by the breaking operation is separated from the plug body, and the fragile portion Provided on the inner peripheral surface of the plug body so as to be located on the back side in the insertion direction from the portion, and of the fragile portion A second engaging portion that engages with the outer peripheral surface of the mouth portion inserted into the insertion hole after disconnection, and is destroyed when receiving a destructive operation for releasing the engagement with the outer peripheral surface. A second engagement portion.

  At least a part of each of the first engaging portion and the second engaging portion is formed so as to be separable from the plug body, and each of the first engaging portion and the second engaging portion is the destruction member. Preferably, at least a portion of the plug body is separated from the stopper body when subjected to an operation.

  The fragile portion is preferably formed by at least one of an annular inner circumferential groove provided on the inner circumferential surface of the stopper main body and an annular outer circumferential groove provided on the outer circumferential surface of the stopper main body. .

  It is preferable that the first engaging portion and the second engaging portion are a first engaging claw and a second engaging claw that respectively engage with a flange provided on an outer peripheral surface of the mouth portion.

  The first engagement claw and the second engagement claw are preferably formed in an annular shape along the circumferential direction of the inner peripheral surface of the plug body.

  The endoscope of the present invention includes an insertion portion to be inserted into a subject, an operation portion connected to a proximal end portion of the insertion portion, and a channel provided in the operation portion. 12. A channel that communicates with an opening provided at a tip of the lip, a cylindrical mouth portion that is provided on an outer surface of the operation portion and communicates with the channel, and is attached to the mouth portion. The stopper according to claim 1 is provided.

  In the plug and endoscope of the present invention, since the plug can be attached to the mouth portion twice, it is not necessary to discard the plug due to a single attachment mistake or the like. As a result, the number of plugs consumed in the medical institution can be reduced.

It is a perspective view of an endoscope. It is sectional drawing of a forceps stopper and a nozzle | cap | die. It is an exploded sectional view of a forceps stopper and a mouthpiece. It is an expanded sectional view of the 1st and 2nd weak part. It is sectional drawing of the forceps stopper before mounting | wearing with a nozzle | cap | die. It is sectional drawing of the forceps stopper before removing from a nozzle | cap | die. It is sectional drawing of a forceps stopper after removing from a nozzle | cap | die. It is sectional drawing of the forceps stopper before attaching to a nozzle | cap | die twice. It is sectional drawing of the forceps stopper attached to the nozzle | cap | die twice. It is sectional drawing of a forceps stopper before removing from a nozzle | cap | die 2nd time. It is sectional drawing of the forceps stopper after removing twice from a nozzle | cap | die. It is sectional drawing of the forceps stopper of other embodiment which can be mounted | worn with a nozzle | cap | die 3 times. It is sectional drawing of the forceps stopper of 2nd Embodiment provided with the 2nd claw which can be fractured. It is a perspective view of the forceps stopper of 2nd Embodiment. It is sectional drawing of the forceps stopper after removing twice from a nozzle | cap | die. It is sectional drawing of the forceps stopper of 3rd Embodiment which destroys a part of 2nd engagement nail | claw at the time of the 2nd removal from a nozzle | cap | die. It is sectional drawing of the forceps stopper of 3rd Embodiment. It is sectional drawing along the A1-A1 line in FIG. It is sectional drawing of a forceps stopper before removing from a nozzle | cap | die 2nd time. It is sectional drawing of the forceps stopper with which a part of 2nd engagement nail | claw was destroyed by operation of the destruction operation part. It is a top view of the 2nd engaging claw partially destroyed by operation of the destruction operation part. It is sectional drawing of the forceps stopper after removing twice from a nozzle | cap | die. It is sectional drawing of the forceps stopper of other embodiment provided with the destruction operation part different from 3rd Embodiment. It is sectional drawing of a forceps stopper before removing from a nozzle | cap | die twice. It is sectional drawing of the forceps stopper from which the 2nd engagement nail | claw was isolate | separated from the stopper main body by operation of the destruction operation part. It is sectional drawing of the forceps stopper of 4th Embodiment which destroys a part of 1st engagement nail | claw at the time of the 1st removal from a nozzle | cap | die. It is a perspective view of the forceps stopper of 4th Embodiment. It is sectional drawing of the forceps stopper before removing from the nozzle | cap | die 1st time. It is sectional drawing of the forceps stopper with which a part of 1st engagement nail | claw was destroyed by operation of the destruction operation part. It is sectional drawing of a forceps stopper after removing from a nozzle | cap | die once. It is sectional drawing of the forceps stopper after the 1st engaging claw partially broken was isolate | separated. It is sectional drawing of the forceps stopper attached to a nozzle | cap | die twice.

[First Embodiment]
As shown in FIG. 1, the endoscope 10 is a bronchoscope that is inserted into a trachea, for example. The endoscope 10 includes an insertion portion 11 that is inserted into a trachea, an operation portion 12, and a universal cord 13. The operation unit 12 is connected to the proximal end portion of the insertion unit 11. One end of the universal cord 13 is connected to the operation unit 12, and the other end is connected to a processor device, a light source device, etc. (not shown) via a composite type connector 13a.

  The insertion portion 11 has a distal end rigid portion 11a, a bendable bending portion 11b, and a flexible flexible tube portion 11c in order from the distal end side to the proximal end side. The distal end surface of the distal end rigid portion 11a is provided with a forceps outlet 15 which is an outlet of the treatment tool 14 such as forceps, an observation window and an illumination window (not shown). An image sensor (not shown) or the like is provided behind the observation window, and an optical fiber cable (not shown) is provided behind the illumination window. The signal line and the optical fiber cable of the image sensor are connected to the processor device and the light source device through the insertion portion 11, the operation portion 12, the universal cord 13, and the connector 13a, respectively.

  A forceps channel 16 for inserting the treatment instrument 14 is disposed in the insertion portion 11. One end of the forceps channel 16 is connected to the forceps outlet 15, and the other end is connected to a forceps port 17 provided in the operation unit 12. The forceps channel 16 is also used as a path for sucking body fluid such as blood and solid matter such as filth from the forceps outlet 15. A suction channel (not shown) branched from the forceps channel 16 is disposed in the operation unit 12. This suction channel is connected to a suction button 18 provided on the operation unit 12.

  The suction button 18 is connected to a negative pressure source (not shown) outside the operation unit 12. The suction button 18 switches communication / blocking between the suction channel and the negative pressure source by a pressing operation or release of the pressing operation.

  The forceps port 17 is provided with a base 20 (see FIG. 2) corresponding to the mouth of the present invention. The base 20 is equipped with a disposable forceps plug 21 that corresponds to the stopper of the present invention and into which the treatment instrument 14 can be inserted. The forceps plug 21 prevents bodily fluids, dirt, air, and the like from leaking through the forceps channel 16 and leaking from the base 20 to the outside when the treatment tool 14 performs a treatment. The forceps plug 21 can be attached to the base 20 twice. For this reason, even if the forceps stopper 21 is removed from the base 20 once, it can be attached to the base 20 only once.

  As shown in FIGS. 2 and 3, the base 20 has an internal conduit 23 that leads to the forceps channel 16. The base 20 has a base body portion 20 a fixed inside the forceps port 17 and a base end portion 20 b protruding toward the front side of the opening of the forceps port 17.

  The base end portion 20b is formed so that its outer diameter is slightly smaller than the outer diameter of the base body portion 20a. A flange 25 that engages with the forceps plug 21 is formed on the distal end side of the outer peripheral surface of the base distal end portion 20b. A front end surface of the flange 25 (hereinafter referred to as a flange front end surface) 25a is an inclined surface in which the front end of the flange 25 has a small diameter. A rear end surface (hereinafter referred to as a flange rear end surface) 25 b of the flange 25 is a plane perpendicular to the axial direction of the base 20.

  The forceps plug 21 has a plug body 29 and a lid 30. The plug body 29 and the lid 30 are made of an elastic material such as rubber. The plug body 29 has a cylindrical shape. An insertion hole 32 is formed in the plug body 29 by an inner peripheral surface thereof. One end side (forceps port 17 side) of the insertion hole 32 is opened as a cap insertion port 32a. The other end side of the insertion hole 32 is opened as a treatment instrument insertion port 32b. The base end portion 20b is inserted from the base insertion port 32a, and the treatment tool 14 is inserted from the treatment tool insertion port 32b.

  On the inner peripheral surface of the stopper body 29, along the insertion direction (hereinafter simply referred to as the insertion direction) of the base 20 from the base insertion port 32a to the treatment instrument insertion port 32b, a first engagement claw 34, a first storage groove 35, a second engagement claw 36, a second storage groove 37, and a partition wall 38 are formed in order. These are integrally formed with the plug body 29.

  The first engagement claw 34 is formed in an annular shape along the circumferential direction of the inner peripheral surface of the plug body 29 at a position in the vicinity of the base insertion port 32a. The first engaging claw 34 engages with the flange 25 of the tip 20b of the base inserted into the insertion hole 32 when the forceps plug 21 is attached for the first time.

  An end surface of the first engagement claw 34 on the side of the cap insertion port 32a is formed on an inclined surface 34a (hereinafter referred to as a claw inclined surface) inclined in the same direction as the flange front end surface 25a. The end surface of the first engagement claw 34 on the treatment instrument insertion port 32b side is formed on a plane 34b (hereinafter referred to as a claw plane) that is parallel to the flange rear end surface 25b. The claw flat surface 34 b is hooked on the flange rear end surface 25 b when the first engagement claw 34 is engaged with the flange 25. Thereby, the movement of the 1st engagement nail | claw 34 to the near direction side of the nozzle | cap | die 20 is controlled.

  The first storage groove 35 is formed in an annular shape along the circumferential direction of the inner peripheral surface of the insertion hole 32 at a position adjacent to the first engagement claw 34. The flange 25 engaged with the first engagement claw 34 is stored in the first storage groove 35.

  The second engagement claw 36 is formed in the same shape as the first engagement claw 34 at a position spaced from the first storage groove 35. The second engaging claw 36 engages with the flange 25 of the base end portion 20b inserted into the insertion hole 32 when the forceps plug 21 is attached for the second time. The second engaging claw 36 has a claw inclined surface 36a inclined in the same direction as the flange front end surface 25a and a claw flat surface 36b parallel to the flange rear end surface 25b. The claw flat surface 36 b is hooked on the flange rear end surface 25 b when the second engagement claw 36 is engaged with the flange 25. Thereby, the movement of the 2nd engagement nail | claw 36 to the near direction side of the nozzle | cap | die 20 is controlled.

  The second storage groove 37 is formed in the same shape as the first storage groove 35 at a position adjacent to the second engagement claw 36. The flange 25 engaged with the second engagement claw 36 is stored in the second storage groove 37.

  The partition wall 38 partitions the insertion hole 32 in the axial direction. A small hole 38 a for inserting the treatment instrument 14 is formed in the partition wall 38. The small hole 38 a is formed with a smaller diameter than the outer diameter of the treatment instrument 14. For this reason, when the treatment tool 14 is inserted into the small hole 38 a, the inner surface of the small hole 38 a comes into close contact with the treatment tool 14. This prevents bodily fluids, dirt, air, etc. from leaking out of the small hole 38a when the treatment instrument 14 is inserted into the small hole 38a. The diameter of the small hole 38a is determined according to the size of the diameter of the treatment instrument 14 to be used.

  The lid 30 is fitted into the treatment instrument insertion port 32b. The lid 30 is formed with a slit 40 through which the treatment instrument 14 can be inserted. Thereby, the treatment instrument 14 can be inserted into the insertion hole 32 from the slit 40.

  When the treatment instrument 14 is not inserted, the slit 40 is closed by the elastic force of the lid 30 to maintain a watertight / airtight state. In addition, the slit 40 is in a state in which the slit edge is in close contact with the outer peripheral surface of the treatment instrument 14 by the elastic force of the lid 30 when the treatment instrument 14 is inserted. Thereby, leakage of body fluid etc. can be prevented both when the treatment instrument 14 is not inserted and when it is inserted. The length of the slit 40 is determined according to the size of the diameter of the treatment instrument 14 to be used.

  The plug body 29 is formed with a first fragile portion 45 and a second fragile portion 46. The 1st weak part 45 and the 2nd weak part 46 are formed more thinly than the other part of the plug main body 29, and intensity | strength becomes weak.

  As shown in FIG. 4, the first fragile portion 45 is formed between the first storage groove 35 and the second engagement claw 36. The first fragile portion 45 is made thinner than other portions of the plug body 29 by annular inner circumferential grooves 45 a and outer circumferential grooves 45 b formed along the circumferential direction of the inner and outer circumferential surfaces of the plug body 29. When the plug main body 29 is pulled toward the front side of the base 20 after the engagement between the first engagement claw 34 and the flange 25, the first fragile portion 45 is connected to the first engagement claw 34 and the flange 25. It breaks with a force smaller than the force required to release the engagement.

  The second fragile portion 46 is formed on the back side in the insertion direction with respect to the second engagement claw 36. Here, the “insertion direction” is a direction in which the base 20 is inserted into the insertion hole 32. The second weakened portion 46 is made thinner than the other portions of the plug body 29 by an annular outer circumferential groove 46 a formed along the circumferential direction on the outer circumferential surface of the plug body 29. When the plug body 29 is pulled after the engagement between the second engagement claw 36 and the flange 25, the second fragile portion 46 is caused by the force required to release the engagement between the second engagement claw 36 and the flange 25. Breaks with a small force. The second fragile portion 46 is thicker and higher in strength than the first fragile portion 45. For this reason, when the plug main body 29 is pulled after the first engagement claw 34 and the flange 25 are engaged, the second fragile portion 46 does not break before the first fragile portion 45.

  Next, the operation of the forceps plug 21 having the above-described configuration, particularly the method for mounting and removing the forceps plug 21 to the base 20 will be described. First, as shown in FIG. 5, the position of the forceps plug 21 is adjusted so that the center of the base insertion port 32a coincides with the center of the base end portion 20b. Next, a pressing operation for pressing the forceps plug 21 toward the cap tip 20b is performed. Thereby, the base end portion 20b and the flange 25 are inserted into the insertion hole 32 from the base insertion port 32a.

  The flange 25 inserted into the insertion hole 32 contacts the first engagement claw 34. When the claw inclined surface 34a of the first engagement claw 34 is pressed by the flange tip surface 25a, the first engagement claw 34 is gradually expanded in diameter. When the pressing operation of the forceps plug 21 is continued, the first engagement claw 34 gets over the flange 25 and is restored to the original shape. As a result, the first engaging claw 34 engages with the flange 25. Thus, the attachment of the forceps stopper 21 is completed.

  At this time, if a forceps plug 21 that does not correspond to the type of the treatment tool 14 to be used is attached to the base 20 by mistake, the forceps plug 21 is removed from the base 20.

  As shown in FIG. 6, first, the stopper body 29 is pulled toward the front side of the base 20 (hereinafter referred to as the front direction). At this time, when the claw flat surface 34b of the first engagement claw 34 is hooked on the flange rear end surface 25b, the movement of the first engagement claw 34 toward the front side is restricted.

  As shown in FIG. 7, when the force of the pulling operation is increased, the first fragile portion 45 cannot withstand this force and breaks before the engagement between the first engaging claw 34 and the flange 25 is released. As a result, the first engagement claw 34 is separated from the plug main body 29, so that the forceps plug 21 is removed from the base 20 with the first engagement claw 34 left on the base 20. Here, the forceps stopper once removed from the base 20 is denoted by reference numeral 21a. Further, the plug body of the forceps plug 21a is denoted by reference numeral 29a.

  One end of the insertion hole 32 of the plug body 29a is opened as a cap insertion port 32c into which the cap tip 20b can be inserted. Moreover, the 2nd engaging claw 36 which can be engaged with the flange 25 remains on the inner peripheral surface of the plug main body 29a. For this reason, the forceps stopper 21a can be attached to the base 20 only once. This eliminates the need to discard the unused forceps plug 21a that has been removed from the base 20 due to a mounting error or the like, and prevents the forceps plug 21a from being wasted.

  When the treatment tool 14 corresponding to the forceps plug 21a is used, the forceps plug 21a removed first is attached to the base 20 before the insertion portion 11 is inserted into the body of the subject. As shown in FIG. 8, a pressing operation for pressing the forceps plug 21 a against the base end portion 20 b is performed, and the base end portion 20 b and the flange 25 are inserted into the insertion hole 32 from the base insertion port 32 c.

  As shown in FIG. 9, the forceps plug 21 a is attached to the base 20 by the second engaging claw 36 engaging with the flange 25 by the pressing operation. Next, after inserting the insertion portion 11 into the body of the subject, the distal end of the insertion portion 11 is made to reach a desired position in the body while observing. Then, the treatment instrument 14 is inserted into the forceps channel 16 from the forceps plug 21a and various treatments are performed. After the endoscopic examination and treatment are completed, the removal of the forceps plug 21a is started.

  As shown in FIG. 10, a pulling operation is performed in the forward direction with respect to the plug body 29a. At this time, the claw plane 36b of the second engagement claw 36 is hooked on the flange rear end surface 25b, so that the movement of the second engagement claw 36 toward the near side is restricted.

  As shown in FIG. 11, when the force of the pulling operation is further increased, the second fragile portion 46 cannot withstand this force and breaks before the engagement between the second engagement claw 36 and the flange 25 is released. . As a result, the second engagement claw 36 is separated from the plug main body 29, so that the forceps plug 21 a is removed from the base 20 with the second engagement claw 36 left on the base 20. Here, the forceps stopper removed twice from the base 20 is denoted by reference numeral 21b.

  In the forceps plug 21b, there is no engaging claw that can engage with the flange 25 of the base 20. For this reason, since the forceps plug 21b cannot be attached to the base 20 again, the forceps plug 21b cannot be reused. Since it is not necessary to discard unused forceps plugs due to a single attachment mistake or the like, the number of consumption of forceps plugs in a medical institution can be reduced. In addition, when the same treatment tool is used again for one subject, it is not necessary to attach a new forceps plug to the base 20, and the same effect can be obtained. Furthermore, it is used first when observing and treating a single subject using multiple endoscopes with different insertion section outer diameters (forceps channel diameter) and insertion section lengths. The forceps plug 21 attached to the endoscope can be removed and attached to the endoscope to be used next. In such a case, conventionally, two forceps plugs have been required. However, in the present invention, since one forceps plug can be used, the number of consumed forceps plugs in a medical institution can be reduced.

  Although the forceps stopper 21 of the first embodiment can be attached to the base 20 twice, for example, it may be attached to the base 20 three times like a forceps stopper 50 shown in FIG. Since the forceps plug 50 has basically the same configuration as the forceps plug 21, the same components as those of the forceps plug 21 in terms of function and configuration are denoted by the same reference numerals and description thereof is omitted.

  A third engagement claw 53 and a third storage groove 54 are formed on the inner peripheral surface of the plug main body 51 of the forceps plug 50 in addition to the first and second engagement claws 34 and 36. The third engagement claw 53 is basically the same as the first to second engagement claws 34 and 36, and is formed at a position farther in the insertion direction than the second fragile portion 46. The third storage groove 54 is basically the same as the first to second storage grooves 35 and 37, and is formed at a position adjacent to the back side in the insertion direction of the third engagement claw 53.

  A third fragile portion 55 is formed between the third engaging claw 53 and the partition wall 38 in the plug body 51. Specifically, the third fragile portion 55 is formed by forming an annular outer circumferential groove 55 a along the circumferential direction on the outer circumferential surface of the plug body 51.

  When the plug body 51 is pulled after the third engagement claw 53 and the flange 25 are engaged, the third fragile portion 55 is caused by the force required to release the engagement between the third engagement claw 53 and the flange 25. Breaks with a small force. Further, the third fragile portion 55 has higher strength than the second fragile portion 46. For this reason, when the plug main body 51 is pulled in the front direction in a state where the first engagement claw 34 or the second engagement claw 36 is engaged with the flange 25, the third fragile portion 55 is the first fragile portion 55. -It will not break rather than the 2nd weak parts 45 and 46.

  Even after the forceps plug 50 configured as described above is removed from the base 20 twice, the third engagement claw 53 that can be engaged with the flange 25 remains in the plug body 51. For this reason, the forceps stopper 50 can be attached to the base 20 three times. For this reason, even if a mounting mistake occurs twice, the forceps plug 50 can be mounted on the base 20 once more. This prevents the unused forceps plug 50 from being wasted.

  In addition, when the forceps plug 50 is removed from the cap 20 for the third time, the third weakened portion 55 is broken, so that the third engagement claw 53 is separated from the plug body 51. As a result, there is no engagement claw that can be engaged with the flange 25, so that it cannot be attached to the base 20 and cannot be reused.

  The forceps stopper may be attached to the base four times or more. For example, for a forceps plug that can be mounted N times (N is a natural number of 3 or more), the first engaging claw, the first fragile portion, the second engaging claw, the second fragile portion, ..., the Nth engagement claw and the Nth weak part are provided. The Nth weak part has higher strength than the first to (N-1) weak parts. As a result, the base 20 can be mounted N times.

[Second Embodiment]
Next, the forceps plug 60 according to the second embodiment of the present invention will be described with reference to FIG. When the forceps plug 21 of the first embodiment is detached from the base 20 for the second time, the second weakened portion 46 is broken, so that the third attachment to the base 20 becomes impossible. On the other hand, in the forceps plug 60, the second engagement claw 62 is formed on the plug body 61, so that the third mounting on the base 20 is impossible.

  The forceps plug 60 basically has the same configuration as that of the forceps plug 21 of the first embodiment except that a second engagement claw 62 is provided instead of the second fragile portion 46, and functions as the forceps plug 21. -The same components are designated by the same reference numerals and the description thereof is omitted.

  The second engagement claw 62 has the same shape as the second engagement claw 36 of the first embodiment. However, the second engaging claw 62 is formed of a material having higher strength than the first weakened portion 45 but lower strength than the plug main body 61. For this reason, the second engaging claw 62 does not break before the first fragile portion 45 when the plug main body 61 is pulled after the first attachment of the forceps plug 60. Further, the second engaging claw 62 is broken when the plug body 61 is pulled with a stronger force than the first removal after the engagement with the flange 25.

  Next, a method for removing the forceps plug 60 having the above-described configuration from the base 20 will be described. Note that the flow of processing until the forceps plug 60 is attached to the base 20 twice is the same as that in the first embodiment, and thus the description thereof is omitted here.

  As shown in FIG. 14, after the endoscopic examination and the treatment are completed, the stopper main body 61 is pulled forward to remove the forceps stopper 60 from the base 20. At this time, when the second engagement claw 62 is caught by the flange 25, the movement of the second engagement claw 62 toward the near side is restricted.

  As shown in FIG. 15, when the force of the pulling operation is further increased, the second engagement claw 62 is broken because the second engagement claw 62 cannot withstand this force and breaks. For this reason, since there is no engaging claw that can engage with the flange 25 of the base 20 in the forceps plug 60, the forceps plug 60 cannot be attached to the base 20 again. As a result, the third attachment of the forceps plug 60 to the base 20 becomes impossible. Similar to the first embodiment, since the forceps plug 60 can be attached to the base 20 twice, the same effects as those described in the first embodiment can be obtained.

  In the second embodiment, the entire second engaging claw 62 is formed of a material having higher strength than the first weakened portion 45 but lower strength than the plug body 61. A part may be formed of the same material. Further, the strength may be lower than that of the plug body 61 by forming at least a part of the second engaging claw 62 to be thin.

  In the second embodiment, the second engagement claw 62 is made of a material having a lower strength than the plug body 61, but the first engagement claw 34 is also made of a material having a lower strength than the plug body 61. It may be formed.

[Third Embodiment]
Next, a forceps plug 65 according to a third embodiment of the present invention will be described with reference to FIGS. The forceps plug 21 according to the first embodiment is configured such that the plug body 29 is pulled toward the front side after the second mounting of the forceps plug 21 on the base 20 as shown in FIG. It is removed from the base 20 in a state where it is left on. On the other hand, the forceps plug 65 destroys at least a part of the plug body 66 and the second engagement claw 36 after the second attachment to the base 20, thereby leaving the second engagement claw 36 in the base 20. It is removed from the base 20 without.

  The forceps stopper 65 has basically the same configuration as the forceps stopper 21 of the first embodiment. However, the plug body 66 is provided with a destruction operation part 67 instead of the second weak part 46. In addition, about the same thing as the forceps stopper 21 of 1st Embodiment on a function and a structure, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  When the second operation of removing the forceps plug 65 from the base 20 is performed, the destruction operation unit 67 destroys the plug body 66 and a part of the second engagement claw 36 to remove the second engagement claw 36 and the flange 25. It is operated to make it possible to release the engagement. The destruction operation unit 67 includes a knob 69, a first destruction operation weak part 70, and a second destruction operation weak part 71.

  The knob 69 is provided on the outer peripheral surface of the plug main body 66 and on the back side in the insertion direction with respect to the second engagement claw 36, and has a substantially tongue-like shape. When the forceps plug 65 is removed from the base 20 for the second time, the knob 69 is pulled in a radial direction (hereinafter simply referred to as a radial direction) from the central axis of the plug body 66 toward the outer peripheral side (hereinafter referred to as a radial operation). )

  The first and second fracturing operation weakened portions 70 and 71 are formed in the plug body 66. When the knob 69 is pulled, the first and second fragile parts 70 and 71 for breaking operation are portions of the plug body 66 located between the knob 69 and the first fragile part 45 (hereinafter, scheduled to break). 66a is broken so as to separate from the plug body 66. For this reason, the 1st-2nd weak parts 70 and 71 for destruction operation are formed with the material from which intensity | strength becomes lower than the other part of the plug main body 66. FIG.

  The first fragile portion 70 for breaking operation is formed at an upper position of the knob 69 in FIGS. 16 and 17 and along the upper surface of the knob 69. Further, the first fragile operation-use weakened portion 70 is formed so as to reach from the outer peripheral surface of the plug body 66 to the inner peripheral surface.

  The second destructive operation weakening portion 71 extends from the both sides of the knob 69 in FIGS. 17 and 18 (specifically, both ends of the first destructive operation weakening portion 70) to the first weakening portion 45, respectively. It has a shape. Further, each of the second fragile portions 71 for breaking operation is formed so as to reach from the outer peripheral surface of the stopper main body 66 to the inner peripheral surface and the second engaging claw 36.

  Next, a method of removing the forceps plug 65 having the above-described configuration from the base 20 will be described. Since the flow of processing until the forceps plug 65 is attached to the base 20 twice is the same as that in the first embodiment, the description thereof is omitted here.

  As shown in FIG. 19, after the endoscopic examination and treatment are completed, the removal of the forceps plug 65 from the base 20 is started. Specifically, the knob 69 is pulled in the radial direction. When the force of the pulling operation is further increased, the first and second fragile portions 70 and 71 for breaking operation cannot withstand this force and break. As a result, as shown in FIG. 20, the planned fracture portion 66 a is separated from the plug body 66.

  As shown in FIG. 21, when the planned fracture portion 66 a is separated from the plug body 66, the second engagement claw 36 and the surrounding plug body 66 change from a substantially ring shape to a substantially C shape. The second engaging claw 36 and the plug body 66 around the second engaging claw 36 are not easily deformed even when a force is applied in a substantially ring shape, but the cut portion 66b is expanded by applying a force in a substantially C-shaped state. It becomes easy to expand and deform. As a result, the engagement between the second engagement claw 36 and the flange 25 can be released.

  As shown in FIG. 22, when a pulling operation is performed with respect to the plug body 66, the second engagement claw 36 and the surrounding plug body 66 are deformed to increase in diameter, thereby the second engagement claw 36. And the flange 25 are disengaged. As a result, the forceps stopper 65 is removed from the base 20. Only the C-shaped second engaging claw 36 that has been destroyed previously remains in the forceps plug 65 that has been removed from the base 20 twice. With the second engagement claw 36, the forceps plug 65 cannot be fixed to the base 20, and the forceps plug 65 is wobbled. As a result, the third attachment of the forceps stopper 65 to the base 20 is substantially impossible.

  Since the forceps plug 65 can be attached to the base 20 twice as in the first embodiment, the same effects as those described in the first embodiment can be obtained. Since the forceps plug 65 can be removed without leaving the second engagement claw 36 on the base 20, it is possible to save the user from having to remove the second engagement claw 36 from the base 20.

  The first and second fragile portions 70 and 71 for breaking operation of the third embodiment are made of a material that is lower in strength than the plug body 66. For example, the plug body 66 has a notch groove or the like. You may form thinner than other parts. In addition, the first and second fragile portions 70 and 71 for breaking operation may be appropriately changed in shape as long as the second engaging claw 36 can be broken to a state where the engagement with the flange 25 can be released. .

  In the breaking operation portion 67 of the third embodiment, a part of the second engagement claw 36 is separated from the plug body 66 by a pulling operation on the knob 69, but all of the second engagement claw 36 is removed from the plug body 66. You may make it isolate | separate from. In this case, for example, as shown in FIG. 23, a destruction operation part 75 is provided in the plug body 66 instead of the destruction operation part 67.

  The destruction operation unit 75 includes a first destruction operation weak part 77, a second destruction operation weak part 78, and a knob 79. The first fragile operation-use weakening portion 77 is provided on the outer peripheral surface of the plug main body 66 and on the far side in the insertion direction from the second engagement claw 36. The first fragile portion 77 for breaking operation is formed in an annular shape along the circumferential direction of the outer peripheral surface of the plug body 66, and is thinner than other portions of the plug body 66.

  The second fragile portion for breaking operation 78 is provided on the outer peripheral surface of the plug body 66 and between the first fragile portion 45 and the first fragile portion for breaking operation 77. The second breaking operation weakened portion 78 extends long in the axial direction of the plug main body 66, and is thinned like the first breaking operation weakened portion 77. One end of the second fragile portion for destructive operation 78 reaches the first fragile portion for destructive operation 77, and the other end reaches the first fragile portion 45. Similar to the first and second fragile portions for destructive operation 70 and 71, the first and second fragile portions for destructive operation 77 and 78 have lower strength than the plug body 66.

  The knob 79 is provided on the outer peripheral surface of the plug main body 66 and at a position between the first fragile operation fragile portion 77 and the first fragile portion 45, more specifically, in the vicinity of the second fragile operation fragile portion 78. It has been. The knob 79 is pulled (destructed) in the radial direction when the forceps plug 65 is removed for the second time.

  As shown in FIG. 24, when the knob 79 is pulled, the first breaking operation weak part 77 and the second breaking operation weak part 78 are broken. As a result, as shown in FIG. 25, the second engaging claw 36 and the end of the surrounding plug body 66 are separated from the plug body 66, so that the engagement between the second engaging claw 36 and the flange 25 is achieved. Canceled. As a result, the forceps plug 65 can be removed from the base 20. Since there is no engaging claw that can engage with the flange 25 of the base 20 in the forceps plug 65, it is impossible to attach the forceps plug 65 to the base 20 for the third time.

  The breaking operation unit is not limited to the embodiment shown in FIG. 17 and FIG. 23, and may be configured as long as the second engaging claw 36 can be broken to a state where the engagement with the flange 25 can be released. -You may change a shape etc. suitably. In this case, you may make it destroy at least one part of the 2nd engagement nail | claw 36 by various destruction operations other than pulling operation.

  In the third embodiment, when the forceps plug 65 is removed for the second time, a part of the plug body 66 is destroyed. However, the entire plug body 66 is changed by changing the shape of the destruction operation portion. You may make it destroy. Further, instead of providing the first engaging claw 34 and the first weakened portion 45 in the forceps plug 65, a first engaging claw that can be broken like the second engaging claw 62 of the second embodiment may be provided. Good.

[Fourth Embodiment]
Next, a forceps plug 85 according to a fourth embodiment of the present invention will be described with reference to FIGS. When the forceps plug 65 of the third embodiment is removed from the base 20 for the first time, the base is left with the first engaging claw 34 left on the base 20 in the same manner as the forceps plug 21 of the first embodiment. 20 is removed. On the other hand, the forceps plug 85 is removed from the base 20 without leaving the first engagement claw 34 in the base 20 even when it is removed from the base 20 for the first time.

  The forceps stopper 85 has basically the same configuration as the forceps stopper 65 of the third embodiment. However, the plug body 86 of the forceps plug 85 is provided with a destruction operation portion 87 and a weakened portion 88. In addition, about the same thing as a forceps stopper of 1st-3rd embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  When the forceps plug 85 is removed from the base 20 for the first time, the destruction operation section 87 destroys the plug main body 86 and a part of the first engagement claw 34, and the first engagement claw 34 and the flange 25. It is operated to release the engagement. The destruction operation unit 87 has basically the same configuration as the destruction operation unit 67, and includes a knob 89, a first destruction operation weak part 90, and a second destruction operation weak part 91.

  The knob 89 is provided on the outer peripheral surface of the plug main body 86 and at a position between the first engagement claw 34 and the first fragile portion 45. The knob 89 is pulled (destructed) in the radial direction when the forceps plug 85 is removed from the base 20 for the first time.

  When the knob 89 is pulled, the first and second fragile portions 90 and 91 for breaking operation are plugged by a planned breakage portion 86a between the knob 89 and the end face on the base insertion port 32a side in the plug body 86. Break to separate from the body 86. The weak parts 90 and 91 for the first and second destruction operations are formed so as to have a strength lower than that of at least the plug body 86.

  The first fragile portion 90 for breaking operation is the same as the fragile portion 70 for first destroying operation except that it is provided above the knob 89 in the drawing. The second fragile portion 91 for destroying operation is basically the same as the fragile portion 71 for second destroying operation, and from the both ends of the first vulnerable portion 90 for destroying operation to the cap insertion port 32a side of the plug body 86, respectively. It extends to the end face.

  The fragile portion 88 is basically the same as the first fragile portion 45 of the first embodiment. The fragile portion 88 is broken so that the first engaging claw 34 is separated from the plug body 86 by receiving a breaking operation from the user after the first removal of the forceps plug 85.

  Next, a method for removing the forceps plug 85 configured as described above from the base 20 will be described. Note that the flow of processing until the forceps plug 85 is first attached to the base 20 is the same as that in the first embodiment, and a description thereof will be omitted here.

  For example, when a forceps plug 85 that does not correspond to the treatment instrument 14 used for the treatment is mistakenly attached to the base 20, the knob 89 is pulled in the radial direction as shown in FIG. When the force of the pulling operation is further increased, the first and second fragile portions 90 and 91 for breaking operation are broken. As a result, the planned fracture portion 86 a is separated from the plug body 86.

  As shown in FIG. 29, when the portion 86a to be broken is separated from the plug body 86, the first engaging claw 34 and the surrounding plug body 86 are connected to the second engaging claw 36 of the third embodiment shown in FIG. It becomes a substantially C shape similarly to. For this reason, the first engaging claws 34 and the like are easily deformed to expand in diameter when a forward force is applied to the plug body 86. As a result, the engagement between the first engagement claw 34 and the flange 25 can be released.

  As shown in FIG. 30, when a pulling operation is performed with respect to the plug body 86, the first engaging claw 34 and the surrounding plug body 86 are deformed to expand, The engagement with the flange 25 is released. Thereby, the forceps plug 85 is removed from the base 20.

  Next, as shown in FIG. 31, when a breaking operation is performed on the plug body 86 so as to break at the fragile portion 88, the first engaging claw 34 partially broken first is separated from the plug body 86. The Thereby, the lower end side in the drawing of the insertion hole 32 is opened as a base insertion port 32c into which the base 20 can be inserted.

  As shown in FIG. 32, since the second engaging claw 36 that can engage with the flange 25 remains on the inner peripheral surface of the plug body 86, the forceps plug 85 can be attached to the base 20 once more. it can. As a result, as in the first embodiment, it is not necessary to discard the unused forceps plug 85 that has been removed from the base 20 due to a mounting error or the like. Note that the second removal process of the forceps plug 85 from the base 20 is basically the same as that in the third embodiment, and thus the description thereof is omitted here.

  Although the weak parts 90 and 91 for the first to second destruction operations of the fourth embodiment are formed of a material having a lower strength than the plug body 86, for example, other parts of the plug body 86 by a notch groove or the like. It may be formed thinner. The first and second fragile portions 90 and 91 for breaking operation may be appropriately changed in shape as long as the first engaging claw 34 can be broken to a state where the engagement with the flange 25 can be released. . In this case, at least a part of the first engagement claw 34 may be destroyed by various destruction operations other than the pulling operation.

  Moreover, the destruction operation part 87 is not limited to embodiment shown in FIG.26, FIG.27 etc., if the 1st engagement nail | claw 34 can be destroyed to the state which can cancel | release engagement with the flange 25, You may change a structure, a shape, etc. suitably. For example, the destruction operation unit may have the same configuration as the destruction operation unit 75 illustrated in FIG.

  In the second to fourth embodiments, the forceps plug that can be attached to the base 20 twice has been described. However, the forceps plug may be further provided with one or more engaging claws and a fragile portion and / or a destruction operation portion. The base 20 may be mountable three or more times. Since the structure of the forceps plug in this case is basically the same as that of the forceps plug 50 shown in FIG. 12, the description thereof is omitted here.

  In the first embodiment, the first fragile portion 45 is formed by the inner peripheral groove 45a and the outer peripheral groove 45b, and the second fragile portion 46 of the first embodiment is formed by the outer peripheral groove 46a. Two weak parts may be formed of at least one of an inner circumferential groove and an outer circumferential groove. The same applies to the first fragile portion 45 and the fragile portion 88 of other embodiments.

  In the said 1st Embodiment, although the thin 1st-2nd weak parts 45 and 46 are formed in the plug main body 29, the 1st-2nd weak parts 45 and 46 are stronger than the other part of the plug main body 29. However, it may be formed of a material that is easy to break. The same applies to the first fragile portion 45 and the fragile portion 88 of other embodiments.

  In each of the above embodiments, the forceps plug mounted on the base 20 provided in the forceps port 17 has been described as an example. However, the forceps plug mounted directly on the opening of the forceps port 17 is also described. The present invention can be applied.

  In each of the above-described embodiments, the description has been made by taking the annular engaging claw as an example of the engaging portion of the forceps plug that engages with the outer peripheral surface of the base 20 such as the flange 25. If it is a match, the shape, number, etc. of the engaging portions are not particularly limited.

  In each of the above-described embodiments, the forceps plug attached to the forceps port 17 has been described as an example. However, for example, various channels disposed inside the endoscope 10 such as a suction channel and an air / water supply channel. In addition, the present invention can be applied to various plugs attached to a mouth portion that leads to a pipe line.

  In the above embodiment, the endoscope 10 inserted into the trachea has been described as an example. However, for example, various medical endoscopes such as a large intestine endoscope inserted into the large intestine, and other industrial applications such as an industrial use, etc. The present invention can also be applied to endoscopes used for applications.

10 Endoscope 20 Base 21, 21a, 21b, 50, 60, 65, 85 Forceps plug 25 Flange 29, 29a, 51, 61, 66, 86 Plug body 32 Insertion hole 34 First engagement claw 36, 62 Second Engaging claw 45 1st weak part 46 2nd weak part 67,75,87 Destruction operation part 88 Fragile part

Claims (12)

In a plug attached to a substantially cylindrical mouth provided in the endoscope so as to lead to a channel inserted into the endoscope,
A cylindrical plug body having an insertion hole into which the mouth is inserted;
A first engaging portion that is provided on the inner peripheral surface of the plug body and that engages with the outer peripheral surface of the mouth portion inserted into the insertion hole;
It is formed in the plug body so as to be located further in the insertion direction of the mouth than the first engagement portion, and the plug body is engaged with the mouth after the engagement of the first engagement portion and the mouth. A first fragile portion that breaks so that the first engagement portion is separated from the plug body when pulled to the front side of the portion;
An outer periphery of the mouth portion that is provided on the inner peripheral surface of the stopper main body so as to be located on the inner side in the insertion direction with respect to the first fragile portion, and is inserted into the insertion hole after the first fragile portion is broken. A second engagement portion that engages the surface;
A second fragile portion formed in the plug body so as to be located on the back side in the insertion direction with respect to the second engagement portion, and has a strength higher than that of the first fragile portion, A second fragile portion that breaks so that the second engagement portion is separated from the plug body when the plug body is pulled after the engagement between the two engagement portions and the mouth portion;
A stopper characterized by comprising. The first fragile portion is formed by an annular inner circumferential groove provided on the inner circumferential surface of the stopper main body and an annular outer circumferential groove provided on the outer circumferential surface of the stopper main body,
The plug according to claim 1, wherein the second fragile portion is formed by an annular outer peripheral groove provided on an outer peripheral surface of the plug main body. In a plug attached to a substantially cylindrical mouth provided in the endoscope so as to lead to a channel inserted into the endoscope,
A cylindrical plug body having an insertion hole into which the mouth is inserted;
A first engaging portion that is provided on the inner peripheral surface of the plug body and that engages with the outer peripheral surface of the mouth portion inserted into the insertion hole;
It is formed in the plug body so as to be located further in the insertion direction of the mouth than the first engagement portion, and the plug body is engaged with the mouth after the engagement of the first engagement portion and the mouth. A fragile portion that breaks so that the first engagement portion is separated from the plug body when pulled to the near side of the portion;
It is provided on the inner peripheral surface of the plug main body so as to be located on the inner side in the insertion direction from the fragile portion, and engages with the outer peripheral surface of the mouth portion inserted into the insertion hole after the fragile portion is broken. A second engaging portion that is formed so that at least a part thereof is lower in strength than the plug body,
The plug is characterized in that the second engagement portion is destroyed when the plug body is pulled after the engagement with the outer peripheral surface of the mouth portion.   The plug according to claim 3, wherein at least a part of the second engagement portion is formed of a material having a lower strength than the plug main body. In a plug attached to a substantially cylindrical mouth provided in the endoscope so as to lead to a channel inserted into the endoscope,
A cylindrical plug body having an insertion hole into which the mouth is inserted;
A first engaging portion that is provided on the inner peripheral surface of the plug body and that engages with the outer peripheral surface of the mouth portion inserted into the insertion hole;
It is formed in the plug body so as to be located further in the insertion direction of the mouth than the first engagement portion, and the plug body is engaged with the mouth after the engagement of the first engagement portion and the mouth. A fragile portion that breaks so that the first engagement portion is separated from the plug body when pulled to the near side of the portion;
It is provided on the inner peripheral surface of the plug main body so as to be located on the inner side in the insertion direction from the fragile portion, and engages with the outer peripheral surface of the mouth portion inserted into the insertion hole after the fragile portion is broken. A second engaging portion that is destroyed when receiving a breaking operation for releasing the engagement with the outer peripheral surface;
A stopper characterized by comprising.   The second engaging portion is formed so that at least a part thereof is separable from the plug main body, and at least a part of the second engaging portion is separated from the plug main body when subjected to the breaking operation. The stopper according to claim 5. In a plug attached to a substantially cylindrical mouth provided in the endoscope so as to lead to a channel inserted into the endoscope,
A cylindrical plug body having an insertion hole into which the mouth is inserted;
A first engagement portion that is provided on the inner peripheral surface of the stopper main body and engages with the outer peripheral surface of the mouth portion inserted into the insertion hole, and releases the engagement with the outer peripheral surface. A first engagement portion that is destroyed when receiving a destruction operation for,
The fragile portion formed in the plug body so as to be located on the back side in the insertion direction of the mouth portion with respect to the first engagement portion, wherein the first engagement portion destroyed by the destruction operation is the plug A fragile part that can be broken so as to be separated from the main body,
It is provided on the inner peripheral surface of the plug main body so as to be located on the inner side in the insertion direction from the fragile portion, and is related to the outer peripheral surface of the mouth portion inserted into the insertion hole after the fragile portion is broken. A second engaging portion that is broken when receiving a breaking operation for releasing the engagement with the outer peripheral surface;
A stopper characterized by comprising. The first engaging portion and the second engaging portion are formed such that at least a part of each is separable from the plug body,
8. The stopper according to claim 7, wherein the first engaging part and the second engaging part are separated from the stopper main body when the first engaging part and the second engaging part are each subjected to the destruction operation.   The fragile portion is formed by at least one of an annular inner circumferential groove provided on the inner circumferential surface of the stopper main body and an annular outer circumferential groove provided on the outer circumferential surface of the stopper main body. The stopper according to any one of claims 3 to 8.   The said 1st engaging part and the 2nd engaging part are the 1st engaging claw and the 2nd engaging claw respectively engaged with the flange provided in the outer peripheral surface of the said opening part, It is characterized by the above-mentioned. The stopper according to any one of 1 to 9.   The plug according to claim 10, wherein the first engagement claw and the second engagement claw are formed in an annular shape along a circumferential direction of an inner peripheral surface of the plug main body. An insertion part to be inserted into the subject;
An operation unit connected to a base end of the insertion unit;
A channel provided in the operation unit, the channel communicating with an opening provided at a distal end of the insertion unit;
A cylindrical mouth portion provided on the outer surface of the operation portion and leading to the channel;
The stopper according to any one of claims 1 to 11, which is attached to the mouth,
An endoscope comprising:

Images