JP5485315B2 - Plug and endoscope - Google Patents

Description

  The present invention relates to a non-reusable endoscope plug mounted on the mouth of a channel of an endoscope, and an endoscope including the plug.

  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 Document 1). 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, since a body fluid or the like adheres due to use, a disposable type that is not reusable so as to be replaced with a new one for each use is desired from the viewpoint of infection prevention.

  Patent Documents 1 and 2 disclose forceps plugs that can be removed from the mouthpiece of the channel opening by breaking a part of the plug body. These forceps plugs are not reusable because they are broken when removed from the base. As a result, the used forceps stopper is prevented from being reused by mistake.

JP 2008-43774 A Japanese Patent Laid-Open No. 3-42275

  In the forceps plug of Patent Document 1, when removing the forceps plug from the base of the channel opening, the gripping portion at the tip of the projection of the plug frame is pushed downward to break the plug body breaking portion made of a thin portion, Separate the part from the plug frame. Thereafter, the plug frame having no protrusion is removed from the base. For this reason, when the forceps plug is attached, if the protrusion is accidentally pressed, the plug body destruction portion may be destroyed.

  In the forceps plug of Patent Document 2, although the plug body can be removed by a pulling operation, a thin wall portion is formed by a groove portion. Therefore, when the stopper body is mounted on the base, There is a risk that stress concentrates on the part, and the thin part may be plastically deformed. In this case, the state of locking to the base becomes insufficient during use, and for example, the forceps plug is removed when the treatment instrument is removed. There is a fear. Also in Patent Document 1, since the fracture portion is configured by the thin portion in the same manner, stress concentrates on the fracture portion when the plug body is mounted. For this reason, if the wall thickness is set to a certain level so as not to be affected at the time of mounting, a force is required for the destruction operation, and the removal cannot be easily performed.

  The present invention has been made to solve the above-described problem. When a plug is attached to a channel opening, it can be attached without concentrating stress on a fractured portion, and can be easily and reliably removed. It is an object of the present invention to provide a plug body that can be used and an endoscope including the plug body.

  In order to achieve the above object, the plug of the present invention is formed on the channel opening of the treatment instrument channel in the endoscope, on the substantially cylindrical frame body attached from the lower end, on the inner peripheral surface of the lower end of the frame body. A plurality of fixing claws for locking the frame main body to the channel opening, protruding radially from the outer peripheral surface of the lower end of the frame main body, and connected to the frame main body via connecting portions located on both sides in the circumferential direction At least one of the gripping part for separation and the connecting part is composed of a notch formed in the cylinder center direction of the frame body and a connecting part left by the notch, and is used as a fragile part and a fragile part for separating the gripping part for separation. A frame body having a side opening formed in contact with the frame body, and a valve body attached to the frame body to close the channel opening and allow insertion of the treatment instrument.

  The plurality of fixed claws are two fixed claws formed at an interval of about 180 degrees in the circumferential direction of the frame main body, and these fixed claws are line-symmetrical with respect to the radial center line of the separation gripping portion. It is preferable to be formed. In this case, when the separation gripping portion is removed, the locking force of the fixed claws positioned at an interval of about 180 degrees is weakened compared to the conventional one in which the fixed claws are formed in the entire circumferential direction. The body can be easily removed from the channel opening.

  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, even if the separation gripping part is separated from the frame main body due to the breakage of the fragile part, the elastic coupling part is not elastically deformed and broken, so the separation gripping part is interposed via the elastic coupling part. It remains as an accessory of the frame 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 fluid etc. Discarded together. Thereby, the risk of infection due to forgetting to discard the separation gripping part can be suppressed.

  The separation gripping portion is preferably formed on the lower end side of the fixed claw, and the side opening is preferably formed up to the center portion in the cylinder center direction of the frame body. In this case, when the fragile portion is broken by pushing the separation gripping portion from the lower end toward the upper end, the frame main body opens greatly from the side opening by detaching the separation gripping portion, and the used frame body is removed. Can be made even easier.

  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.

  The notch is formed radially outward with respect to the frame body and is formed from the lower end to the upper end of the frame body, and the notch faces facing each other in the pressing operation of the separation gripping portion from the upper end to the lower end It is preferable that the contact is a stopper for pressing operation. In this case, when the separation gripping portion is bent from the upper end toward the lower end, the opposing surfaces of the notch come into contact with each other and become a stopper for the pressing operation. Therefore, in the pushing from the upper end to the lower end, further rotational displacement of the separation gripping portion is suppressed, so that the fragile portion is not plastically deformed and broken. Thereby, even when the gripping part is pushed in the attaching direction or an incorrect operation is performed when the frame main body is mounted, it is not broken.

The notch is formed in the connecting portion on the frame body side from the lower end of the frame body toward the upper end, the first notch formed from the lower end of the frame body toward the upper end, and the first notch Having a second notch formed from the upper end side toward the lower end so as to sandwich the connecting portion in the opposite direction, a first notch formed from the lower end of the frame body toward the upper end, A second notch formed from the upper end side toward the lower end so as to sandwich the connecting part in a direction opposite to the one notch, and an intermediate formed at the connecting part between the first notch and the second notch It may have an opening. By these notches, a fragile portion for separating the separation gripping portion can be formed.

  The valve body consists of a lid part, a valve part, a connecting part that connects the lid part and the valve part. And it is preferable that this valve part is accommodated in a frame main body, and a cover part is engage | inserted by the upper end of a frame main body. In this case, the valve body can be easily attached to the frame.

  An endoscope according to the present invention includes an operation unit connected to a proximal end portion of an insertion unit to be inserted into a specimen, and a substantially cylinder that is provided on an outer surface of the operation unit and communicates with a treatment instrument channel inserted through the insertion unit. A channel opening and a plug attached to the channel opening.

  According to the present invention, when the gripping part for separation is bent, the gripping part for separation breaks from the weak part, and a large opening including a side opening is formed in the frame body, and the frame after separating the gripping part for separation The shape of the body changes greatly. Thereby, the plug body can be easily removed from the channel opening. In addition, after cleaning the endoscope after use, the frame body is greatly opened from the side opening after the plug is removed due to breakage from the fragile portion, so that it cannot be reused.

  The notch formed in the tube center direction of the frame body shortens the connecting part of the separation gripping part and the frame body, and the shortened part is used as a fragile part. Compared to the conventional ones, it becomes easier to set or change the breaking strength by the fragile portion. In addition, the weakened part has the same wall thickness as the other plug body parts compared to the conventional one that consists of thin parts, so the channel opening part is fixed when the plug body is attached to the channel opening part. Even when stress concentrates on the fragile part when the claw gets over the diameter, the stress acts as a tensile force in the circumferential direction, and the direction of the stress is different from the shear direction at the time of fracture, and plastic deformation can be avoided. Therefore, there is no risk of plastic deformation as in the case of the weak portion of the conventional thin part, the stopper function of the stopper body can be maintained, and when removing the treatment instrument, the stopper body comes off from the channel opening together with the treatment instrument. Will not be lost. In addition, the influence on the breaking strength due to the variation in thickness due to the formation of the fragile portion can be reduced as compared with the conventional one constituted by the thin-walled portion, and the manufacture becomes easy.

It is a perspective view of an endoscope. It is a perspective view which shows the plug attached to the nozzle | cap | die of a channel opening part. It is a perspective view of a plug before attaching to a mouthpiece of a channel opening. 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 from the gripping part for separation. It is the perspective view which looked at the frame from the lower side. It is a side view of a frame which shows a bending limit when a grasping part for separation is bent below. It is a side view of a frame which shows a fracture state when a grasping part for separation is bent up. It is a perspective view which shows the frame of 2nd Embodiment of this invention. It is a perspective view which shows the frame of 3rd Embodiment of this invention. It is a perspective view which shows the frame of 4th Embodiment of this invention. It is a perspective view which shows the frame of 5th 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 formed 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 connection band (connection portion) 34 that connects them, and is made of an elastomer such as rubber. Elastomer is a synthetic resin that has a property of returning to its original shape even when bent greatly. For example, 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. The plastic is a synthetic resin and has a property of being plastically deformed or broken when bent greatly. For example, a thermoplastic resin. A fixing claw 46 and locking claws 47 and 48 are formed on the inner peripheral surface 45 a of the lower end portion of the frame main body 45. 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 as a valve portion mounting portion 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, the two fixed claws 46 are approximately 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 a pitch. 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.

  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 outer peripheral surface 45 c of the lower end portion 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 lower end portion 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 L <b> 2) that is substantially orthogonal to the straight line L <b> 1 that passes through the cylindrical center of the frame body 45. Protruding). Considering the separation gripping portion 52 as the center, the two fixing claws 46 are positioned symmetrically with respect to the center line L2 in the radial direction from the cylindrical core CL1 of the separation gripping portion 52 and at positions passing through the cylindrical core CL1. Is formed. 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 from the lower end to the upper side in the cylinder center direction. Due to the notches 70, a connecting portion between the separation gripping portion 52 and the frame body 45 is formed short in the cylinder center direction of the frame body 45. This short connection 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 main body 45 and the outer peripheral surface 33a of the valve portion 33 are in close contact with each other, and the locking step portion 45d on 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, by adjusting the length of the connecting portion between the separation gripping portion 52 and the frame main body 45 by the notch 70 formed in the cylinder center direction of the frame main body 45, the breaking strength of the fragile portion 71 is increased. Easy to set up. Further, as shown in FIG. 10, the notch 70 is formed 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, thereby separating the upper end from the upper end. In the pressing operation of the grip portion 52, the opposing surfaces 70a of the notch 70 come into contact with each other, and further bending deformation is suppressed in the range of the bending angle θ1, and the notch 70 itself serves 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. Further, as shown in FIG. 11, when the separation gripping portion 52 is bent upward from the lower end, a large bending angle θ2 can be obtained, and the fragile portion 71 can be broken after plastic deformation. 52 can be easily separated from the frame main body 45.

As in the conventional example plug body disclosed in Patent Documents 1 and 2, as compared to what constitutes a fragile portion of a thin wall, so the weak portion 71 of the same thickness as the other of the frame body portion, the frame Even when stress is concentrated on the fragile portion 71 when the main body 45 is attached to the channel opening portion 17 and the diameter of the fixed claw 46 gets over the channel opening portion 17, even if stress concentrates on the fragile portion 71, this stress is applied as a circumferential tensile force It acts and the direction of stress is different from the shear direction at the time of rupture, and plastic deformation is avoided. Therefore, without plastic deformation, can maintain the locking function of the frame body 45, thereby preventing the frame body 45 with the treatment instrument 14 when extracting the treatment tool 14 deviates from the channel opening 17 . Moreover, the two fixed claws 46 are formed at intervals of about 180 degrees in the circumferential direction, and the separation gripping portion 52 protrudes from the fixed claws 46 at an intermediate position in the circumferential direction. When the portion 52 is removed, the locking force of the fixed claws 46 positioned at an interval of about 180 degrees is weakened compared to the conventional one in which the fixed claws are formed in the entire circumferential direction, and the frame main body 45 is moved to the channel opening portion. 17 can be easily removed.

  As shown in FIGS. 8 and 9, by separating the separation gripper 52 from the frame body 45 by forming a side opening 55 having a connection opening 55 a in the frame body 45 above the separation gripper 52, The connection opening 55 a and the side opening 55 are opened, and a large opening including the side opening 55 is formed in the frame body 45. Thereby, the shape of the frame main body 45 after separating the separation gripping portion 52 is greatly changed. Therefore, the plug body 21 can be easily removed from the channel opening 17.

  When the plug 21 is inserted into the channel opening 17 by forming the separation gripping portion 52 in a substantially U-shape having the opening allowance opening 65, it is substantially at the time of deformation when the internal fixing claw 46 gets over the flange 25. The U-shaped separation gripping portion 52 can be deformed by the opening allowance opening 65. As a result, stress due to deformation is not applied to the fragile portion 71, and the plug body 21 is not accidentally destroyed when the plug body 21 is inserted.

  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.

  By forming the valve body 31 from the lid portion 32, the valve portion 33, and the connecting band 34 that connects them, it is not necessary to separately form the lid portion 32 and the valve portion 33, and the configuration is simplified. In addition, assembly is also easy. Further, by forming the valve body insertion opening 54 on the outer peripheral surface at a position approximately 180 degrees away from the side surface opening 55 in the circumferential direction in the frame body 45, and inserting the valve section 33 from the valve section insertion opening 54, The valve body 31 having the lid portion 32 and the valve portion 33 can be easily assembled to the frame main body 45.

  Further, since the elastomeric valve body 31 having an integral structure in which the lid portion 32 and the valve portion 33 are coupled by the coupling band 34 is provided, the lid portion 32 and the valve portion 33 are formed separately or attached individually. There is no need, and the configuration is simple. Further, since the valve portion 33 is inserted in a state of being crushed from the insertion opening 54 of the frame main body 45 and the valve portion 33 is restored inside and the valve body 31 is attached to the frame main body 45, an individual removal preventing claw or the like is provided. There is no need to form the peripheral surface, and the undercut portion of the inner peripheral surface 45a of the frame body 45 is reduced. Therefore, the mold structure is simplified and the manufacturing suitability is improved. The undercut portion is a portion that cannot be released unless a part of the mold is moved when releasing from the mold.

  The frame body 30 is made of a synthetic resin, the valve body 31 is made of an elastomer, and the openings 54, 55, 55 a are closed by the outer peripheral surface 33 a of the valve portion 33 in a state where the valve portion 33 is held in the frame body 45. As a result, a plug 21 having a two-part structure made of different materials can be obtained, which facilitates manufacture.

(Second Embodiment)
Next, another embodiment in which the notch forming position and shape are changed will be described. As shown in FIG. 12, the frame body 72 of the second embodiment has notches 77 on the tapered surface 76 a of the frame body 76 on both sides of the separation gripping portion 75. In the frame body 72 of the second embodiment and the frame bodies 73, 74, and 79 of the third to fifth embodiments described below, the configuration other than the notch and the separation gripping portion is the same as that of the first embodiment. Since they are the same as those described above, the same reference numerals are assigned and duplicate descriptions are omitted. The cutout 77 of the frame body 72 of the second embodiment is formed so as to be directed upward from the lower end. By this notch 77, the connecting portion between the separation gripping portion 75 and the frame body 76 is formed short in the cylinder center direction of the frame body 76. This short connecting portion serves as a fragile portion 78 for separating the separation gripping portion 75 from the frame body 76. Note that the separation gripping portion 75 may be formed in a U shape having an opening allowance opening at the center portion, like the separation gripping portion 52 of the first embodiment.

(Third embodiment)
As shown in FIG. 13, the frame body 73 of the third embodiment has a lower notch 82 and an upper notch 83 in the frame body 81 on both sides of the separation gripping portion 80. The lower notch 82 is formed so as to be directed upward from the lower end in the cylinder center direction of the frame main body 81, and similarly, the upper notch 83 is formed so as to be directed from the upper end to the lower end. The lower notch 82 is triangular and short, and the upper notch 83 has a semicircular tip and is long. Due to these notches 82 and 83, the connecting portion between the separation gripping portion 80 and the frame body 81 is formed short in the cylinder center direction of the frame body 81. This short connecting portion serves as a fragile portion 84 for separating the separation gripping portion 80 from the frame body 81. In the third embodiment, since the upper notch 83 functions as the connection opening 55a of the first embodiment, the connection opening 55a as in the first embodiment is not necessary. Note that the connection opening 55a may be formed in the same manner as in the first embodiment. In this case, the upper notch 83 is shortened accordingly, and the frame body 81 has a shape close to that of the second embodiment shown in FIG. It becomes.

(Fourth embodiment)
As shown in FIG. 14, in the frame body 74 of the fourth embodiment, the frame main body 86 on both sides of the separation grip 85, the lower notch 87 similar to that of the third embodiment, and an intermediate opening (intermediate slit) ) 88 and an upper notch 89. The lower notch 87 is formed so as to go upward from the lower end in the cylinder center direction of the frame main body 86, and the upper notch 89 is similarly formed so as to go from top to bottom. These lower cutout 87 and upper cutout 89 are triangular and short. The intermediate opening 88 is formed between the lower notch 87 and the upper notch 89, and is a long hole whose both ends are semicircular. Due to the cutouts 87 and 89 and the intermediate opening 88, the connecting portion between the separation grip 85 and the frame body 86 is formed short in the cylinder center direction of the frame body 86. This shortly formed connecting portion becomes the weakened portions 90 and 91 that separate the separation gripping portion 85 from the frame main body 86.

  In the frame 30 of the first embodiment, as shown in FIG. 10, the notch surfaces 70 a come into contact with each other at the time of bending and have a stopper function. However, in the frames 72 to 74 of the second to fourth embodiments, Even when the separation gripping portions 75, 80, 85 are bent so as to be separated, the frame bodies 72 to 74 do not have this function. However, if the separation gripping portions 75, 80, 85 are bent downward, the separation gripping portions 75, 80, 85 hit the channel opening portion 17 so as not to give a bending angle to the extent of breaking. . Thereby, this can be separated only when the separation gripping portions 75, 80, 85 are bent upward.

(Fifth embodiment)
As shown in FIGS. 15 and 16, in the frame 79 of the fifth embodiment, the separation grip 93 is separated from the frame body 94 so that the separation grip 93 separated by the fragile portion 92 is not separated. 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 is shortened easily by the notch 96 so that the length in the cylinder center direction is shortened.

  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. In addition, as shown in FIG. 16, a dividing portion 64b 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 64a in the circumferential direction. When the frame main body 94 is attached to the base 20 (see FIG. 19) by the dividing portions 64a and 64b, the opening and spreading 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. 15, the elastic connecting portion 95 preferably has 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 fifth 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. Accordingly, as shown in FIG. 19, 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, and infection is caused by forgetting to discard the separation gripping portion 93 contaminated with body fluid or the like. Risk will not occur.

  In the fifth embodiment, the notch 96 employs the notch 70 of the first embodiment. Alternatively, each notch in the second to fourth embodiments may be employed in one continuous portion. Good.

  In each of the embodiments described above, 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 each of the above embodiments, as shown in FIG. 6, the integrated valve body 31 in which the lid portion 32 and the valve portion 33 are connected by the connecting band 34 is used, but in addition, the lid portion 32 and the valve portion 33 are provided. You may apply this invention to the plug body formed separately.

  In each of the above-described embodiments, the plug body 21 attached to the base 20 of the channel opening portion 17 has been described as an example. However, the present invention also applies to the plug body 21 attached directly to the channel opening portion 17. Can be applied.

  In each of the above-described embodiments, the stopper 21 attached to the base 20 leading to the treatment instrument channel 16 has been described as an example. However, for example, 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 body attached to a mouth portion that leads to various channels and pipes that are provided.

  In each of the above embodiments, the endoscope 10 inserted into the trachea has been described as an example. However, for example, various medical endoscopes such as a colonoscope inserted into the large intestine, and other uses such as industrial applications The present invention can also be applied to an endoscope or the like used for the above.

DESCRIPTION OF SYMBOLS 10 Endoscope 17 Channel opening part 20 Base 21 Plug body 25 Flange 30,72,73,74,79 Frame body 31 Valve body 32 Cover part 33 Valve part 34 Connection band 45, 76, 81, 86, 94 Frame main body 46 Fixed claw 47, 48 Locking claw 52, 75, 80, 85, 93 Separation gripping part 54 Valve part insertion opening 55 Side opening 55a Connection opening 65 Opening allowance opening 70, 77, 82, 83, 87, 88, 89 , 96 Notch 71,78,84,90,91,92 Vulnerable part

Claims (11)

A substantially cylindrical frame body attached from the lower end to the channel opening of the treatment instrument channel in the endoscope;
A plurality of fixing claws formed on an inner peripheral surface of a lower end portion of the frame body and locking the frame body to the channel opening;
A separation gripping portion protruding in a radial direction from the outer peripheral surface of the lower end portion of the frame main body and connected to the frame main body via connection portions located on both sides in the circumferential direction,
A cutout formed in at least one of the connecting portions in the cylinder center direction of the frame body,
The fragile portion for separating the separation gripping portion, comprising the connecting portion left by the notch,
A side opening formed on the frame body in contact with the fragile portion;
A frame having
A plug body, comprising: a valve body attached to the frame body and closing the channel opening to allow insertion of a treatment instrument.   The plurality of fixed claws are two fixed claws formed at an interval of approximately 180 degrees in the circumferential direction of the frame body, and these fixed claws are located with respect to the radial center line of the separation gripping portion. The stopper according to claim 1, wherein the stopper is formed in a line-symmetric position.   3. The plug according to claim 1, further comprising an elastic connecting portion formed on the other of the connecting portions of the separation gripping portion and elastically deforming when the separation gripping portion is broken.   4. The separation gripping portion is formed at a lower end side than the fixed claw, and the side surface opening is formed up to a central portion in a cylinder center direction of the frame main body. The plug according to the description.   The plug according to any one of claims 1 to 4, wherein the separation gripping portion is formed in a substantially U-shape having an opening for allowing expansion when the plug is inserted into the channel opening. body.   The notch is formed radially outward with respect to the frame body from the lower end to the upper end of the frame body, and the notch is pressed when the separation gripping portion is pressed from the upper end to the lower end. 6. The plug according to any one of claims 1 to 5, wherein the opposing surfaces of the notches are in contact with each other to serve as a stopper for pressing operation. The plug according to any one of claims 1 to 5, wherein the notch is formed in the connecting portion on the frame body side from the lower end to the upper end of the frame body. The notch is formed from a lower end of the frame main body toward the upper end, and from the upper end side toward the lower end so as to sandwich the connecting portion in a direction opposite to the first notch. The plug according to claim 1, further comprising a second cutout. The notch is formed from a lower end of the frame main body toward the upper end, and from the upper end side toward the lower end so as to sandwich the connecting portion in a direction opposite to the first notch. 6. The device according to claim 1, further comprising: a second cutout formed, and an intermediate opening formed in the connecting portion between the first cutout and the second cutout. Plug body. The valve body includes a lid portion, a valve portion, a connecting portion that connects the lid portion and the valve portion,
The frame body has an insertion opening for the valve portion on an outer peripheral surface, the valve portion is deformed and inserted from the insertion opening, the valve portion is accommodated in the frame body, and the lid portion is the frame body. The stopper according to any one of claims 1 to 9, wherein the stopper is fitted on an upper end of the stopper. An operation unit connected to a proximal end portion of the insertion portion to be inserted into the specimen;
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 claim 1 attached to the channel opening.

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