JP5457483B2 - Plug and endoscope - Google Patents

Description

  The present invention relates to an endoscope plug body that is attached to a mouth portion of a channel of an endoscope, and an endoscope including the plug body.

  2. Description of the Related Art Conventionally, in the medical field, an insertion portion of an endoscope is inserted into a patient's body, and various treatments are performed not only on the inside of the body but also on the affected area. Specifically, various treatment tools such as forceps and incision tools are inserted into the treatment tool channel in the insertion section from the channel opening provided in the operation section of the endoscope, and protruded from the distal end of the insertion section, thereby causing the affected area. Various treatments such as excision and sampling are performed.

  A forceps plug into which a treatment tool can be inserted when performing a treatment is attached to the channel opening (see Patent Documents 1 and 2). This forceps plug prevents body fluid, dirt, air, and the like in the body from flowing back through the treatment instrument channel due to a change in the internal pressure of the body and leaking out from the channel opening. As such a forceps plug, as disclosed in Patent Documents 1 and 2, there is known one having a double-layered valve body of a lower plug and an upper plug in a frame body. The lower stopper includes a valve membrane having a treatment instrument insertion hole having a large diameter, and is used when a treatment instrument having a large diameter is used. The upper plug is provided with a valve membrane having an incision, and is used when a treatment instrument having a small diameter that causes a gap between the treatment instrument insertion hole of the lower stopper and the treatment instrument is inserted. Moreover, the thing of patent document 2 removes an upper stopper from a frame body, when the diameter of a treatment tool is thick, and the operativity is improved so that the insertion resistance by an upper stopper may not generate | occur | produce.

JP-A-3-73168 JP 2008-43774 A

  In the forceps plug of Patent Document 1, the upper plug and the lower plug are inserted from the lower side of the plug frame, and a hooking projection is formed on the plug frame so that the upper plug and the lower plug do not fall off the plug frame. These upper plugs and lower plugs are held in the plug frame. Further, in the forceps plug of Patent Document 2, the lower plug is locked and held in the plug frame by the projection for the plug member, and a lid part attaching part is formed on the upper part of the plug frame, and the lid part is fitted into this. It is out.

  As described above, in a plug body such as a conventional forceps plug, it is necessary to configure the upper plug and the lower plug as separate parts, which increases the number of parts and the number of assembly steps. Further, it is necessary to form a locking projection on the inner peripheral surface of the plug frame so that the lower plug or the like does not fall off the plug frame. For this reason, many undercut portions are formed in the mold at the time of molding the plug frame, and there is a problem that, in addition to an increase in the manufacturing cost of the mold, moldability is also reduced by the increase in the number of undercut portions. The undercut portion refers to a portion that cannot be released unless part of the mold is moved when releasing from the mold.

  The present invention has been made to solve the above-described problems, and has an object to provide a plug body that can reduce the number of parts and that can be easily assembled, and an endoscope including the plug body. To do.

  To achieve the above object, a plug of the present invention is a plug that is attached to a channel opening of a treatment instrument channel in an endoscope, closes the channel opening, and allows insertion of a treatment instrument. A valve part into which the treatment tool can be inserted, an elastomeric valve body having a connecting part for connecting the lid part and the valve part, a cylindrical frame body attached to the channel opening part, and a channel opening part side of the frame body. Formed on the inner peripheral surface, the locking portion that locks to the channel opening, formed on the side surface of the frame body, the insertion opening into which the valve portion is deformed and inserted, formed on the side opposite to the channel opening side, And a plastic frame having a fitting portion into which the lid portion is fitted. Note that in this specification, an elastomer is a synthetic resin that has a property of returning to its original shape even when bent greatly. For example, rubber. The plastic is a synthetic resin and has a property of being plastically deformed or broken when bent greatly. For example, a thermoplastic resin.

  In addition, in a state where the channel opening is locked to the locking portion, the valve portion is preferably deformed in the frame main body, and the valve portion, the channel opening and the stepped portion on the inner peripheral surface of the frame main body are preferably in close contact with each other. In this case, even if the insertion opening is formed on the side surface of the frame main body, both can be kept in close contact with each other, and body fluid or the like will not leak from the side surface opening.

  The locking portion has two fixed claws formed apart from each other in the circumferential direction of the frame main body, and the frame main body is at an intermediate position in the circumferential direction with respect to the two fixed claws. A cut formed in the cylinder center direction of the frame main body at least one of the separation gripping portion protruding in the radial direction of the frame main body from the outer peripheral surface on the channel opening side and the connecting portion of the separation gripping portion and the frame main body. It is preferable to have a notch and a fragile part for separating the separation gripping part, which consists of a connecting part left by the notch. In this case, the plug can be easily removed from the channel opening due to the breakage of the fragile portion.

  The frame body is preferably in contact with the fragile portion and has a side opening formed in the frame body. In this case, when the fragile portion is broken, the side opening is opened at the lower end portion of the frame body, and the shape of the frame body changes greatly. As a result, even if the frame body is attached to the channel opening, it cannot be fixed and cannot be reused. Further, it is preferable to form the side opening at a position 180 degrees apart from the insertion opening in the circumferential direction. In this case, the frame main body is divided into upper and lower parts by two openings, and the cylindrical body of the portion where the fixing claw is formed becomes a substantially short cylindrical body compared to the integrated cylindrical body, and the integrated cylindrical body Compared to the above, the rigidity is lowered, and the deformation in the direction of opening and closing the fixed claw becomes easy. This facilitates opening and closing of the fixing claw when the frame body is loaded into the base or removed, and can be easily attached and detached.

  The separation gripping portion is preferably formed closer to the channel opening than the fixed claw, and the side opening is preferably formed to the center portion in the cylinder center direction of the frame body. In this case, if the fragile part is broken by pushing the separation gripping part from the channel opening side to the opposite side, the frame main body will be greatly opened from the side opening by detaching the separation gripping part, making it easier to use. The rear frame can be removed.

  It is preferable to have an elastic connecting portion that is formed on the other of the connecting portions of the separation gripping portion and elastically deforms when the separation gripping portion is broken. In this case, the separation gripping part separated by the breakage of the fragile part is connected to the frame main body by the elastic connecting part, so that the separation gripping part separated from the fragile part can be discarded together with the frame main body. Therefore, unlike the conventional separation gripping part, it is not separated from the frame body in a separate and independent state, so it is not forgetting to discard the separation gripping part contaminated with body fluids etc. Can be disposed of. For this reason, the risk of infection due to forgetting to discard the separation gripper can be suppressed.

  The separation gripping portion is preferably formed in a substantially U shape having an opening for allowing expansion when the plug is inserted into the channel opening. In this case, when the plug body is attached to the channel opening, if a force in the diameter expansion direction of the frame body is applied, the substantially U-shaped separation gripping part is deformed to open the opening allowance opening. The stress is not concentrated on the plug and the fragile portion is not broken when the plug is attached.

  It is preferable that the lid portion includes a valve membrane having a cut into which the treatment tool can be inserted. In this case, in addition to the lid function, it has a valve function that enables insertion of a treatment instrument having a small diameter, and can reliably prevent leakage of body fluids when the treatment instrument is inserted. Moreover, it is preferable that a valve part is provided with the valve membrane which has the penetration hole of a treatment tool, and is formed in a cylinder shape. In this case, leakage of body fluids or the like can be reliably prevented with respect to insertion of a plurality of treatment instruments having different diameters. In addition, by configuring in a cylindrical shape, the deformation can be easily performed, and the valve portion can be easily inserted into the frame body from the insertion opening.

  The endoscope of the present invention is an abbreviation that leads to an operation part connected to the proximal end part of an insertion part to be inserted into a subject and a treatment instrument channel provided on the outer surface of the operation part and inserted into the insertion part. A cylindrical channel opening and a plug attached to the channel opening are provided.

  According to the present invention, by providing an elastomeric valve body having a lid part, a valve part, and a connecting part, it is not necessary to configure these separately, and the number of parts can be reduced. Further, the number of assembly steps can be reduced by reducing the number of parts. In addition, since the valve portion is formed in the side surface of the frame body and the valve portion is inserted into the insertion portion by being deformed, the valve portion is accommodated in the insertion opening, so that the valve portion is accommodated in the frame body. As described above, unlike the case where the valve portion is inserted from the cylinder center direction of the frame main body, a locking projection or the like is not required. Accordingly, the structure of the inner peripheral surface of the frame main body is simplified by that amount, and the undercut portion is reduced, so that the mold manufacturing is simplified, the moldability is improved, and the frame main body can be easily molded. Since the frame body is made of plastic and the valve body is made of elastomer, the frame body is attached to the channel opening via the plastic frame, so that the frame does not fall out of the channel opening.

It is a perspective view of an endoscope. It is a perspective view of a forceps opening and a forceps stopper. It is a perspective view of a nozzle | cap | die and a stopper. It is sectional drawing of the IV-IV line in FIG. It is sectional drawing of the VV line in FIG. It is a perspective view which decomposes | disassembles and shows a stopper. It is a perspective view of a valve body. It is the perspective view which looked at the frame main body from the holding part for separation. It is the perspective view which looked at the frame main body from the lower side. It is a side view which shows the bending limit at the time of pushing to the holding | grip part for separation | separation below. It is a side view which shows the fracture | rupture state at the time of pushing upward of the holding part for separation. It is a perspective view which shows the frame of 2nd Embodiment of this invention. It is the perspective view which looked at the frame of the embodiment from the lower side. It is a bottom view when the holding part of the frame of the embodiment is bent upward. It is a front view of the frame. It is a bottom view when the frame of the same embodiment is fractured from a weak part.

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

  The insertion portion 11 is divided into 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. In addition to the treatment instrument outlet 15 which is the outlet of the treatment instrument 14 such as forceps, an observation window and an illumination window are provided on the distal end surface of the distal rigid portion 11a, although not shown. An image sensor (not shown) or the like is arranged behind the observation window, and an optical fiber cable (not shown) is arranged behind the illumination window. A signal line and an optical fiber cable of the image sensor are connected to the processor device and the light source device through the insertion portion 11, the universal cord 13, and the connector 13a, respectively.

  A treatment instrument channel 16 for inserting the treatment instrument 14 is provided in the insertion portion 11. One end of the treatment instrument channel 16 is connected to the treatment instrument outlet 15, and the other end is connected to the channel opening 17 of the operation unit 12. The treatment instrument channel 16 is also used as a path for sucking body fluid such as blood and solid matter such as filth from the treatment instrument outlet 15. A suction channel (not shown) branched from the treatment instrument channel 16 is provided in the operation unit 12, and this suction passage is connected to a suction button 18 of 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 passage and the negative pressure source by a pressing operation or release of the pressing operation.

  A disposable stopper (forceps plug) 21 into which the treatment instrument 14 (see FIG. 1) can be inserted is attached to the channel opening 17. As shown in FIG. 2, the channel opening 17 has a base 20. The plug body 21 is attached to the channel opening 17 through the base 20. In the following description, as shown in FIG. 2 and FIG. 3, each part of the plug body 21 is described with reference to the state in which the base 20 of the channel opening 17 faces upward, which is the attachment side. The lower part is referred to as the lower end, and the opposite end is referred to as the upper end.

  As shown in FIG. 3, the base 20 is formed in a cylindrical shape having an internal conduit 23 leading to the treatment instrument channel 16 (see FIG. 1). As shown in FIGS. 4 and 5, the internal pipe line 23 is formed in a taper shape in which the inner diameter gradually decreases from the upper side to the lower side. As shown in FIG. 6, the outer peripheral surface of the base 20 is formed with a male screw portion 20a at the bottom, a packing mounting groove 20b at the center, and a flange 25 at the top. The male screw portion 20 a is screwed into a female screw portion (not shown) formed in the channel opening portion 17 to fix the base 20 to the channel opening portion 17. A packing (not shown) is accommodated in the packing mounting groove 20b. The packing prevents leakage of bodily fluids, dirt, air and the like from the gap with the channel opening 17.

  The flange 25 is slightly smaller than the central portion of the base 20. The plug body 21 is locked to the flange 25, and the plug body 21 is detachably attached to the base 20. The flange 25 is formed with an inclined surface (hereinafter referred to as a flange inclined surface) 25a by cutting out a corner portion formed by the upper end surface and the outer peripheral surface.

  The plug 21 prevents bodily fluids and the like in the body from flowing back through the treatment instrument channel 16 and leaking from the base 20 to the outside when performing treatment with the treatment instrument 14. The plug body 21 includes a frame body 30 and a valve body 31 held by the frame body 30. The valve body 31 closes the base 20 and allows the treatment tool 14 to be inserted when the treatment tool 14 (see FIG. 1) is inserted.

  As shown in FIG. 7, the valve body 31 includes a lid portion 32, a valve portion 33, and a connecting band 34 that connects them, and is made of an elastomer such as rubber. The lid portion 32 includes a valve membrane 36 having a cut 35 and is entirely formed in a cap shape. An annular protrusion 37 that protrudes inward is formed on the inner peripheral surface of the lid portion 32. In addition, a detachable gripping portion 38 is connected to the side of the lid portion 32 opposite to the connection side of the connection band 34 with the same cross-sectional shape as the connection band 34. Two finger hooking protrusions 38 a are formed on the upper surface of the detachable gripping portion 38 so as to protrude.

  The valve portion 33 includes a valve membrane 42 having a treatment instrument insertion hole 41 and is formed in a cylindrical shape. The valve membrane 42 is recessed in the shape of a hemisphere or a conical surface, and has a treatment instrument insertion hole 41 at the center thereof. The valve portion 33 is inserted into the frame body 45 and is held by the inner peripheral surface 45a.

  As shown in FIGS. 8 and 9, the frame body 30 includes a substantially cylindrical frame main body 45, fixed claws 46 formed on the frame main body 45, locking claws 47 and 48, a separation gripping portion 52, and an insertion opening. 54, a side opening 55, and a flange 56, which are integrally formed of plastic. An inner peripheral surface 45 a is opened at the lower end of the frame body 45. A fixed claw 46 and locking claws 47 and 48 are formed at the lower end portion of the inner peripheral surface 45a. A locking step 45d is formed at the upper end of the inner peripheral surface 45a. A separation gripping portion 52 and two openings 54 and 55 are formed on the outer peripheral surface of the frame body 45 in order from the lower end. A flange 56 for attaching the valve portion 33 is formed on the upper end surface of the frame main body 45.

  As with the flange 25 of the base 20, the flange 56 has a flange outer inclined surface 56 a on the outer peripheral surface side. Further, the inner peripheral surface side has a flange inner inclined surface 56b. As shown in FIGS. 4 and 5, when the lid portion 32 is put on the flange 56, the annular protrusion 37 of the lid portion 32 spreads over the flange outer inclined surface 56a and the outer peripheral surface 56c (see FIG. 8). As a result, the locking surface 37 a of the annular projection 37 is locked to the locking surface 56 d of the flange 56. Thereby, the lid portion 32 is not easily removed from the upper end of the frame main body 45.

  As shown in FIG. 10, the two openings 54 and 55 are arranged at an interval of about 180 degrees in the circumferential direction at the center of the frame main body 45. As shown in FIG. 6, the valve portion 33 is inserted from one insertion opening 54 in a state of being crushed and deformed. After the insertion, as shown in FIGS. 4 and 5, when the valve portion 33 is restored by its own elastic force, the outer peripheral surface 33a of the valve portion 33 comes into close contact with the inner peripheral surface 45a. As shown in FIG. 6, the other side surface opening 55 has a connection opening 55 a at the lower portion, and is formed larger than the insertion opening 54 downward. The connection opening 55a reaches a fragile portion 71 described later.

  As shown in FIGS. 8 and 9, two fixed claws 46 are spaced 180 degrees in the circumferential direction on the inner peripheral surface 45 a below the continuous portion 57 between the insertion opening 54 and the side opening 55. It is formed with. As shown in FIG. 5, these fixing claws 46 get over the flange 25 of the base 20 when the frame main body 45 is attached to the base 20. Thereby, the locking surface 46a of the fixing claw 46 is locked to the flange locking surface 25b. Further, as shown in FIGS. 8 and 9, locking claws 47 and 48 with which the flange inclined surface 25 a abuts protrude inward on the inner peripheral surface 45 a. The locking claws 47, 48 are formed at positions that are shifted by 90 degrees in the circumferential direction with respect to the fixed claw 46, and are spaced above the fixed claw 46 by the thickness of the flange 25. One locking claw 47 is divided into two by a connection opening 55a. The fixing claw 46 and the locking claws 47 and 48 constitute a locking portion for locking the plug body 21 to the channel opening 17.

  As shown in FIG. 9, the space between the inner peripheral surface 45 a and the lower end surface 45 b of the frame main body 45 is chamfered to form a tapered insertion guide surface 63. The insertion guide surface 63 guides the flange 25 of the base 20 during insertion.

  As shown in FIG. 8, the lower end portion of the outer peripheral surface 45 c of the frame main body 45 is a tapered surface 64 that gradually expands toward the lower end corresponding to the insertion guide surface 63. The tapered surface 64 ensures the thickness of the frame main body 45 and maintains the strength of the lower end portion of the frame main body 45.

  On the tapered surface 64, a separation gripping portion 52 that protrudes in the radial direction of the frame body 45 is formed. As shown in FIG. 9, the separation gripping portion 52 connects the circumferential centers of the two fixing claws 46, and is in a radial direction (straight line) that is substantially orthogonal to the straight line L1 that passes through the cylindrical center CL1 of the frame body 45. L2). The separation gripping portion 52 is formed in a U shape having an opening allowance opening 65 in a horizontal plane including the two fixed claws 46.

  As shown in FIG. 8, a portion of the frame main body 45 that is close to both sides that are the joint portions of the separation gripping portion 52 to the frame main body 45 and that is positioned radially outward from the outer peripheral surface 45 c of the frame main body 45 is provided. A notch 70 is formed in parallel with the cylinder center CL1 from the lower end to the upper side. With this cutout 70, the connecting portion between the separation gripping portion 52 and the frame main body 45 is formed to be shorter by the cutout 70 in the cylinder center direction of the frame main body 45. This short connecting portion serves as a fragile portion 71 for separating the separation gripping portion 52 from the frame main body 45.

  The cutout 70 is formed with a certain width. As shown in FIG. 10, when the separation gripping portion 52 is pushed downward, the pair of opposed notch surfaces 70 a come into contact with each other to restrict further bending. Functions as a stopper. As shown in FIG. 11, when the separation gripping portion 52 is pushed upward, there is no contact by the notch surface 70a, so that the separation gripping portion 52 can be greatly bent upward. . Due to this bending deformation, the fragile portion 71 undergoes plastic deformation and then breaks. In this manner, by forming the notch 70 in one of the cylinder center directions, the displaceable angles θ1 and θ2 of the separation gripper 52 defined by the notch 70 are set to different angles between the lower side and the upper side. Can do. In the bending deformation using the large angle θ2, the fragile portion 71 is broken, and in the bending deformation using the small angle θ1, the elastic deformation range is set. Instead of forming the cutout 70 on one side in the cylinder center direction, it may be formed on both. In this case, by changing the length of the two notches, it is possible to make a difference in the bendable angles θ1 and θ2 between the upper side and the lower side.

  As shown in FIG. 6, when the valve body 31 is assembled to the frame body 30, the valve portion 33 is crushed and deformed, and then inserted into the frame body 45 from the insertion opening 54. Since the valve portion 33 is formed in a cylindrical shape, it can be easily deformed to be crushed. When the valve portion 33 is restored in the frame main body 45, the outer peripheral surface 33a of the valve portion 33 comes into close contact with the inner peripheral surface 45a of the frame main body 45, and does not come out of the insertion opening 54 by pulling or the like within a normal operation range.

  Further, the inner peripheral surface 45a of the frame body 45 and the outer peripheral surface 33a of the valve portion 33 are in close contact with each other, and the upper end step portion 45d of the inner periphery of the frame main body 45 and the upper end portion 33b of the valve portion 33 are in close contact with each other, Even if the connection opening 55a and the openings 54, 55 are formed in the frame main body 45, body fluid or the like does not leak from these openings 54, 55, 55a. In particular, since the height of the valve portion 33 is set so that the valve portion 33 is subjected to compressive deformation when the flange 25 of the base 20 is inserted into the frame main body 45, the inner peripheral surface of the frame main body 45. Adhesiveness with the upper end part 33b of the valve part 33 to 45a is ensured. Furthermore, the adhesiveness between the base 20 and the valve portion 33 is also ensured, and the watertightness / airtightness between the two is ensured.

  As shown in FIG. 1, in use, the plug body 21 is attached to the channel opening 17 of the operation unit 12 of the endoscope 10. For this attachment, as shown in FIG. 3, the lower end portion of the plug body 21 is pushed into the flange 25 of the base 20 so as to be externally fitted. As a result, as shown in FIG. 9, the lower end portion of the frame main body 45 is deformed so that the opening allowance opening 65 of the separation gripping portion 52 is opened, so that the two fixing claws 46 on the inner peripheral surface 45a are in the direction of the arrow A1. And can easily get over the flange 25. When the fixing claw 46 gets over the flange 25, the locking surfaces 46a and 25b of the fixing claw 46 and the flange 25 come into contact with each other and are securely locked. Thereafter, in this state, the frame body 45 cannot be removed from the base 20. It becomes possible.

  When the lid portion 32 is fitted into the flange 56 of the frame main body 45 and the treatment instrument 14 is not used, the notch 35 of the lid portion 32 is in close contact with the elastic force of the lid portion 32 and is in a watertight / airtight state. Holding.

  When using a relatively small diameter of the treatment instrument 14, the treatment instrument 14 can be inserted from the notch 35 of the lid 32 with the lid 32 fitted into the upper portion of the frame body 45. . When the treatment tool 14 is inserted through the cut 35, the cut surface is brought into close contact with the outer peripheral surface of the treatment tool 14 due to the elastic force of the lid portion 32. Therefore, even if the insertion portion 11 is inserted into the patient's body, blood, body fluid, or the like does not leak out from the plug body 21. Further, in the case of the treatment instrument 14 having a large diameter, the treatment instrument 14 can be inserted from the treatment instrument insertion hole 41 of the valve section 33 by removing the lid 32 from the frame body 45.

  After use of the endoscope 10, the stopper 21 is removed from the base 20 and the endoscope 10 is cleaned. When removing the plug 21 from the base 20, as shown in FIG. 11, the separation grip 52 is bent upward with the fragile portion 71 as the center by picking the separation grip 52 and lifting it upward. When the bending angle exceeds θ2, the fragile portion 71 breaks after plastic deformation.

  Since the separation gripping portion 52 is separated from the frame main body 45 after the breakage, the side opening 55 having the connection opening 55a is opened and is greatly opened at the lower end. As a result, the locking claw 46 and the flange 25 of the base 20 can be easily unlocked, and the plug body 21 can be easily removed from the base 20. In addition, in the state where the separation gripping portion 52 is separated from the frame body 45, the connection opening 55a and the side surface opening 55 are opened. For this reason, the reattachment to the base 20 becomes impossible, and even if it is attached, the plug body 21 is easily removed, so that reuse is prevented.

  According to the present embodiment, as shown in FIG. 6, the elastomeric valve body 31 having the lid portion 32, the valve portion 33, and the connecting band (connecting portion) 34 is provided, so that these need to be configured separately. And the number of parts can be reduced. Further, the number of assembly steps can be reduced by reducing the number of parts.

  In addition, the valve body 33 is formed on the side surface of the frame body 45 and has the insertion opening 54 into which the valve section 33 is deformed and inserted. Therefore, unlike the conventional case in which the valve portion 33 is inserted from the cylinder center direction of the frame main body 45, there is no need for a locking projection for locking these on the inner peripheral surface 45a. . Therefore, the structure of the inner peripheral surface 45a of the frame main body 45 is simplified correspondingly, and the undercut portion is reduced, so that the mold manufacturing is simplified and the moldability of the frame body 30 is improved.

  By making the frame main body 45 made of plastic, it can be firmly attached to the base 20 as compared with a case where an elastomeric valve body is directly fitted into the base 20. Therefore, the frame main body 45 does not fall out of the base when the treatment tool is extracted.

  Since the lid portion 32 includes the valve membrane 36 having the cuts 35, a treatment instrument having a small diameter can be inserted in addition to the lid function. Therefore, even if the first treatment instrument having a small diameter is inserted, leakage of body fluid or the like can be reliably prevented. In addition, the valve portion 33 includes a valve membrane 42 having a second treatment tool insertion hole 41 having a diameter larger than that of the first treatment tool, and is formed in a cylindrical shape so that the first and the different diameters are provided. Leakage of body fluid or the like can be reliably prevented with respect to the second treatment instrument.

  By forming the valve portion 33 in a cylindrical shape, the deformation can be easily performed. Thereby, as shown in FIG. 6, the valve portion 33 can be easily inserted into the frame main body 45 from the insertion opening 54. Further, as shown in FIG. 5, the valve body 33 is fitted into the frame body 45 in a state where the frame body 45 is fitted into the flange 25 of the base 20 and the fixing claw 46 is locked to the locking surface 25 b of the flange 25. Thus, the diameter of the valve portion 33 is increased and the outer peripheral surface 33a of the valve portion 33 is brought into close contact with the inner peripheral surface 45a of the frame main body 45. Therefore, even if the insertion opening 54 and the side opening 55 are formed on the outer peripheral surface of the frame main body 45, the valve portion 33 and the frame main body 45 remain in close contact with each other. Will not leak.

  As shown in FIG. 9, notches 70 are formed on both sides of the separation gripping portion 52 in the cylinder center direction of the frame body 45, and the separation gripping portions 52 are formed in the cylinder center direction of the frame body 45 by the notches 70. By providing the fragile portion 71 in which the connecting portion between the frame body 45 and the frame body 45 is shortened, the separation gripping portion 52 can be easily separated from the frame body 45, and the plug body 21 can be easily removed.

  As shown in FIG. 8, when the separation grip 52 is separated from the frame body 45 by forming a side opening 55 having a connection opening 55a in the frame body 45 above the separation grip 52, the connection opening 55a The side opening 55 is opened from the lower end, and a large opening including the side opening 55 is formed at the lower end of the frame body 45. Thereby, the shape of the frame main body 45 after separating the gripping portion 52 is greatly changed. Therefore, the plug body 21 can be easily removed from the channel opening 17. In particular, by forming the side opening 55 up to the center of the frame body 45 in the cylinder center direction, when the separation gripping portion 52 is pushed from the lower end side to the upper end side to break the fragile portion 71, the separation gripping portion 52 is separated. The frame main body 45 opens greatly from the side opening 55, and the used frame body 30 can be removed from the base 20 more easily. Further, the breaking strength of the fragile portion 71 can be easily set by adjusting the length of the connecting portion between the separation gripping portion 52 and the frame main body 45.

  As shown in FIG. 9, by forming the separation gripping part 52 in a substantially U shape having the opening allowance opening 65, when the plug body 21 is inserted into the channel opening 17, the flange 25 is connected to the fixing claw 46 inside. At the time of deformation at the time of getting over, it can be deformed by the opening allowance opening 65 of the substantially U-shaped separation gripping portion 52. Thereby, stress due to deformation is not concentrated on the fragile portion 71, and the plug body 21 is not accidentally destroyed when the plug body 21 is inserted.

  By forming the notch 70 from the lower end of the frame main body 45 toward the upper end at a position radially outward from the frame main body 45, as shown in FIG. In the pressing operation of 52, the opposing surfaces 70a of the notch 70 come into contact with each other and serve as a stopper for the pressing operation. Therefore, the deformation does not lead to breakage, and the separation gripping portion 52 is not accidentally separated from the frame body 45.

  The separation grip 52 is formed on the lower end side of the fixed claw 46, the side opening 55 has a connection opening 55 a between the separation grip 52 and the connection opening 55 a is formed up to the fragile portion 71. Thus, when the separation grip 52 is separated from the frame main body 45, the shape of the frame main body 45 can be greatly changed by the side opening 55 and the connection opening 55a, and the plug body 21 can be easily removed and reused. Can be prevented.

  As shown in FIG. 9, by forming the side opening 55 at a position 180 degrees away from the insertion opening 54 in the circumferential direction, the frame body 45 is divided into two parts by the two openings 54 and 55, and is integrated. Compared to the cylindrical body, the portion where the fixing claw 46 is formed is a short cylindrical body. Therefore, the bending rigidity is lower than that of the integrated cylindrical body, and the deformation in the direction of the arrow A1 that opens and closes the fixed claw 46 is facilitated. This makes it easy to open and close the fixing claw 46 when the frame main body 45 is loaded into or removed from the base 20, and can be easily attached and removed after use.

(Second Embodiment)
As shown in FIGS. 12 to 16, in the frame 79 of the second embodiment, the separation grips 93 are separated so that the separation grips 93 separated by the fragile portions 92 are not separated from the frame body 94. The weak part 92 is provided only on one side of the part 93, and the elastic connection part 95 is provided on the other side. The fragile portion 92 has a small thickness in the tube center direction due to the notch 96.

  The elastic connecting portion 95 is provided so as to extend from the side of the separation gripping portion 93 in the circumferential direction of the frame main body 94, and its tip is bent at approximately 90 degrees to connect to the frame main body 94. . The separation gripping portion 93 is formed with an opening allowance opening 97. The opening allowance opening 97 opens to the inner peripheral surface of the frame body 94 and forms a dividing portion 64 a of the tapered surface 64. Further, as shown in FIG. 13, a dividing portion 64 b is formed by an opening that divides the tapered surface 64 in the circumferential direction at a position 180 degrees away from the dividing portion 64 a in the circumferential direction. When the frame main body 94 is attached to the base 20 (see FIG. 15) by the dividing portions 64a and 64b, the opening and opening allowance opening 97, and the elastic connecting portion 95, as shown by an arrow A1 in FIG. It becomes easy to spread the fixing claw 46 in the opening direction. Therefore, the fixing claw 46 rides over the flange 25 (see FIG. 3) of the base 20 so that the plug can be easily attached to the base.

  The elastic connecting portion 95 has a thickness less than half of the thickness of the separation gripping portion 93, and there is no notch 96 as formed in the fragile portion 92. As shown in FIG. 12, it is preferable that the elastic coupling portion 95 satisfy ta ≦ Wa and La ≧ 2 × ta when the length is La, the width is Wa, and the thickness is ta. By configuring the elastic connecting portion 95 in this manner, bending resistance due to the elastic force of the elastic connecting portion 95 can be reduced when the separation gripping portion 93 is pushed upward to break from the fragile portion 92.

  In the second embodiment, when the separation gripping portion 93 is pushed upward and bent at the fragile portion 92, the bending stress is concentrated on the fragile portion 92, and the fragile portion 92 is plastically deformed to be broken. The elastic connecting portion 95 has a thickness less than half that of the separation gripping portion 93, and even if bending deformation that causes breakage at the fragile portion 92 is applied, it remains within the elastic deformation range and is not broken. Therefore, as shown in FIG. 16, the separation gripping portion 93 that is broken from the fragile portion 92 is connected to the frame main body 94 by the elastic connecting portion 95, and thus is reliably discarded together with the frame main body 94. can do. Therefore, unlike the conventional case, the separation gripping portion 93 is not separated from the frame main body 94 and is not separated from the frame main body 94. For example, the separation gripping portion 93 contaminated with body fluid is forgotten to be discarded. There is no risk of infection.

  In the above embodiment, the lid portion 32 includes the valve membrane 36 having the cut 35 and is formed in a cap shape. However, the lid portion 32 may be a lid portion having no valve function by eliminating the cut 35. Moreover, it is good also as a valve part of the triple structure which connected the cover part which does not have such a valve function, and the cover part 32 which has the notch 35 with the connection band 34. FIG. In this case, a lid attached to the flange 56 of the frame main body 45 can be selected and used as necessary. For example, a lid having no valve function is used for a case where the treatment tool is not used, and a lid having a valve function is used for a case where the treatment tool is not used.

  In the said embodiment, although the connection part was comprised by the connection band 34 of a cross-sectional rectangular shape, a cross-sectional shape is not limited to a rectangular shape, For example, the cross-section may be a string-like body with a circle or an ellipse.

  In the above-described embodiment, the fragile portion 71 is configured by the notch 70, but in addition to this, the notch for configuring the fragile portion 71 is not formed outside the lower end portion of the outer peripheral surface 45 c of the frame body 45. Alternatively, it may be formed on the tapered surface 64 of the frame body 45. Further, the notch 70 may be formed not only on the lower side but also on the upper side. Further, the weakened portion may be configured by providing an intermediate slit made of, for example, an oval opening between the lower notch and the upper notch.

  In each of the above embodiments, the plug body 21 having the separation gripping portions 52 and 93 that are broken by the fragile portions 71 and 92 has been described. However, the plug body that does not include the fragile portions 71 and 92 or the separation gripping portions 52 and 93. In addition, the present invention may be applied.

  In the above embodiment, the plug 21 attached to the base 20 of the channel opening 17 has been described as an example. However, the present invention is also applied to the plug 21 directly attached to the channel opening 17. Can be applied.

  In the above embodiment, the plug 21 attached to the base 20 that communicates with the treatment instrument channel 16 has been described as an example. However, the stopper 21 is disposed inside the endoscope 10 such as a suction channel or an air / water supply channel. The present invention can be applied to a plug attached to a mouth portion that leads to various channels and pipe lines.

  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.

DESCRIPTION OF SYMBOLS 10 Endoscope 17 Channel opening part 20 Base 21 Plug body 25 Flange 30,79 Frame body 31 Valve body 32 Cover part 33 Valve part 34 Connection band 45,79 Frame main body 46 Fixing claw 47,48 Locking claw 52,93 Separation Grip part 54 Insertion opening 55 Side opening 55a Connection opening 65 Opening allowance opening 70, 96 Notch 71, 92 Vulnerable part

Claims (9)

In a plug body that is attached to a channel opening of a treatment instrument channel in an endoscope, closes the channel opening, and allows insertion of a treatment instrument.
A lid, a valve part into which the treatment instrument can be inserted, an elastomeric valve body having a connecting part for connecting the lid part and the valve part;
A cylindrical frame body attached to the channel opening, formed on an inner peripheral surface of the frame body on the channel opening side, and formed on a side surface of the frame body. An insertion opening into which the valve portion is deformed and inserted, a plastic frame body formed on the side opposite to the front channel opening side and having a fitting portion into which the lid portion is fitted. Plug body.   In a state where the channel opening is locked to the locking portion, the valve portion is deformed in the frame main body, and the valve portion, the channel opening and the stepped portion on the inner peripheral surface of the frame main body are in close contact with each other. The plug according to claim 1. The locking portion has two fixed claws formed apart from each other in the circumferential direction of the frame body,
The frame body is
A separation gripping portion projecting in the radial direction of the frame body from the outer peripheral surface of the frame body on the channel opening side at an intermediate position in the circumferential direction with respect to the two fixed claws;
At least one of the connecting portions between the separation gripping portion and the frame main body, a notch formed in the cylinder center direction of the frame main body,
The plug body according to claim 1 or 2, further comprising: a weakened portion for separating the separation gripping portion, the connection portion being left by the notch.   The plug body according to claim 3, wherein the frame main body has a side opening formed in the frame main body in contact with the fragile portion.   The plug according to claim 4, wherein the side opening is formed at a position 180 degrees away from the insertion opening in the circumferential direction.   6. The separation gripping portion is formed on the channel opening side of the fixed claw, and the side surface opening is formed up to a central portion in the cylinder center direction of the frame body. Plug body.   The plug according to any one of claims 1 to 6, wherein the lid includes a valve membrane having a cut into which a treatment tool can be inserted.   The plug according to any one of claims 1 to 7, wherein the valve portion includes a valve membrane having an insertion hole for a treatment instrument and is formed in a cylindrical shape. An operation unit connected to a proximal end portion of an insertion portion to be inserted into a subject;
A substantially cylindrical channel opening that is provided on the outer surface of the operation portion and communicates with a treatment instrument channel inserted through the insertion portion;
An endoscope comprising: the plug according to any one of claims 1 to 8 attached to the channel opening.

Images