JP2013043064A - Insertion aid for endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insertion aid for an endoscope provided with a hand operation unit for switching a tube connected to a fluid conduit in a sheath insertion portion between an open state and a closed state by pressing or releasing the tube, wherein the insertion aid can prevent damage of the hand operation unit when not in use while preventing a defect of the tube of being easy to get crushed and also which can suitably perform sterilization.SOLUTION: A handle unit 30 of the insertion aid includes an operating mechanism for opening and closing the tubes connected to an air pipe line and a water pipe line of the sheath insertion portion 14 by pressing them. Specifically, the handle unit includes stoppers 90 and 92 biased in a pressing position to press the tubes, and a lever 32 for moving the stoppers 90 and 92 to a non-pressing position so as not to press the tubes. The lever 32 has through-holes 112 and 114 laterally penetrating. When a lock pin 110 is inserted into the through-holes, the lever 32 is locked in a predetermined rotational position, thereby holding the stoppers 90 and 92 in the non-pressing position.

Description

  The present invention relates to an endoscope insertion aid, and more particularly to an endoscope insertion aid provided with a cleaning mechanism for cleaning an observation window and an illumination window provided in an insertion portion of an endoscope.

  In the medical field, medical diagnosis using an endoscope is widely performed. Since such an endoscope is used in an environment where the distal end portion of the insertion portion is easily contaminated, the observation window and the illumination window provided at the distal end portion of the insertion portion are always kept clean to ensure a good visual field. There is a need.

  Patent Documents 1 to 3 disclose an endoscope insertion assisting tool (simply referred to as an insertion assisting tool) provided with a cleaning mechanism used for a rigid endoscope or the like. According to this, the insertion assisting tool includes a sheath main body portion mounted on the endoscope main body portion and a sheath insertion portion into which the endoscope insertion portion is inserted. The sheath insertion part is configured such that its inner diameter is larger than the outer diameter of the insertion part of the rigid endoscope. As a result, a fluid supply passage is formed between the sheath insertion portion and the endoscope insertion portion in the mounted state in which the endoscope insertion portion is inserted into the sheath insertion portion. The fluid supply passage is communicated with a nozzle provided at the distal end portion of the sheath insertion portion. Therefore, when a fluid such as cleaning liquid or gas is supplied to the fluid supply passage, the fluid is ejected from the nozzle to the observation window and the illumination window of the endoscope, so that the observation window and the illumination window are kept clean.

  In addition, as an operation mechanism for switching on / off the injection of fluid to the observation window, Patent Document 3 discloses a tube of a tube by pressing (crushing) the tube that supplies the fluid to the fluid supply passage of the insertion assisting tool. It has been proposed to switch to an open state in which a tube line is opened by releasing the pressure of the tube by closing the path. According to this, the tube is set to a closed state when the practitioner does not operate the operation member of the operation mechanism, and the tube is held in a state where the ejection of fluid to the observation window is stopped. On the other hand, when the practitioner performs a predetermined operation on the operation member of the operation mechanism, the tube is switched to the open state, and fluid is ejected to the observation window.

JP 7-275185 A JP-A-9-135804 Japanese Patent No. 38337763

  By the way, the ejection of the fluid to the observation window and the illumination window is turned off except when the operator intends, and as in Patent Document 3, the tube is closed by pressing the tube, and the observation window and the illumination window are moved to. In the case of the operation mechanism that turns off the ejection of the fluid, the state in which the tube is pressed becomes a steady state. Therefore, there is a possibility that the state in which the tube is pressed before the treatment continues for a long time. In that case, the tube is crushed and wrinkled, and there is a possibility that the tube channel may not be completely opened even when the tube is released during the treatment. At this time, the momentum of the fluid sprayed to the observation window and the illumination window is weak, and there is a possibility that cleaning is not performed appropriately. Further, if the movable part such as the operation member is in a movable state, it may be easily damaged due to an impact or an external force applied during transportation before using the treatment.

  In addition, when performing gas sterilization with ethylene oxide gas or the like, if the tube is in a pressed state, there is a problem that the gas does not sufficiently circulate in the tube in the tube or the tube connected to the tube, and is not easily sterilized. There is also a possibility that bacteria will easily accumulate. The same problem occurs when sterilization is performed by other methods such as autoclave sterilization, stellar sterilization, and γ-ray sterilization other than gas sterilization.

  The present invention has been made in view of such circumstances, and includes an internal operation unit that switches a tube between a closed state and an open state by pressing and releasing the tube connected to the fluid conduit of the sheath insertion unit. Endoscope that can prevent the tube from being crushed and wrinkled when the tube is pressed for a long time in the endoscope insertion aid, and can prevent damage to the hand control unit when not in use. An object is to provide a mirror insertion aid.

  In order to achieve the above object, the present invention provides a hand operating section, and a tubular sheath inserting section having a lumen connected to the hand operating section and having a lumen inserted through an insertion section of an endoscope. The endoscope insertion assisting tool includes a fluid conduit that communicates with a nozzle provided at a distal end of the sheath insertion portion, and the proximal operation portion includes a tube connected to the fluid conduit. A main body having a fixing portion arranged along a position to be passed, and a fixing position that is opposed to the fixing portion with the tube interposed therebetween, and a pressing position that presses the tube and a non-pressing position that does not press the tube A pressing member that is displaced between the main body, a driving member that is displaceably supported with respect to the main body, a pressing driving position that displaces the pressing member to a pressing position, and a non-pressing position that displaces the pressing member to a non-pressing position. Press drive position A driving member that is displaced between the locking member and a locking member that is displaceable between a predetermined locking position and a non-locking position with respect to the main body, and is engaged with the pressing member or the driving member at the locking position. By combining, the pressing member is held at the non-pressing position, and the pressing member is held at the non-pressing position by not being engaged with the pressing member and the driving member at the non-locking position. And a non-locking member.

  According to the present invention, the pressing member can be held in the non-pressing position by the locking member, and the tube can be held (locked) in the non-pressing state. The problem of crushing creases on the surface can be prevented by locking with a locking member.

  In addition, by locking the tube in a non-pressed state, the tube can be stored for a long period of time with the tube installed in the hand control unit without causing crushing flaws. The time and effort required for preparation can be reduced.

  In addition, since the movement of the driving member and the pressing member is restricted by the locking by the locking member, it is not easily damaged.

  Furthermore, by performing gas sterilization while the tube is locked to the non-pressed state by the lock member, the gas can sufficiently pass through the conduit in the tube and the conduit to which the tube is connected. Will come to be. It is also suitable for sterilization by other methods.

  In this invention, it is preferable that the said locking member is arrange | positioned in the position which prevents mounting | wearing of the said endoscope at the time of the said locking position. According to this embodiment, when the tube is locked in the non-pressed state by the lock member, the endoscope cannot be attached to the insertion aid for endoscope, so forgetting to release the lock It is possible to prevent a problem that the use is started. That is, if the use in the treatment is started without releasing the lock and the feeding of the fluid to the tube is started, the fluid is simultaneously ejected from the nozzle of the insertion assisting tool, leading to an unexpected situation. There is a fear. In this embodiment, since the endoscope cannot be attached without releasing the lock, such a situation is prevented.

  In this embodiment, it is preferable that the lock member is in a position that does not prevent the endoscope from being attached when the lock member is in the unlocked position. According to this embodiment, the endoscope can be automatically attached simultaneously with the release of the lock by the lock member. On the contrary, if the endoscope is attached, a mode in which the lock by the lock member is automatically released is possible.

  In this embodiment, the driving member includes an urging member that urges the pressing member in a direction to displace the pressing member from the non-pressing position to the pressing position, and the driving member applies an urging force to the urging member by applying an operating force. Accordingly, it is preferable to displace the pressing member from the pressing position to the non-pressing position. In this embodiment, the pressing member is urged so as to be in the pressing position by the urging member, and the pressing member is displaced to the non-pressing position against the urging force of the urging member by the driving member.

  In the present invention, it is preferable that the pressing member is integrally formed with the urging member. According to this embodiment, the configuration can be simplified.

  In the present invention, the lock member is a lock member that engages with the drive member by being removably inserted into an insertion hole formed in the drive member, and the position when the lock member is inserted into the insertion hole. Is set to the lock position, the position when it is extracted from the insertion hole is set to the non-lock position, and the drive member is held at the non-press drive position by contacting the main body at the lock position. The locking member is preferably a locking member that holds the pressing member in the non-pressing position.

  This form shows one form of a lock member, and it can be locked and released simply by inserting and removing the lock member to be inserted into and removed from the insertion hole of the drive member, and the configuration is also simple.

  In the present invention, when the locking member is in the locking position, the locking member overlaps a region through which the light guide connector of the endoscope passes when the insertion portion of the endoscope is inserted into the sheath insertion portion. Preferably they are arranged.

  In this embodiment, since the lock member arranged at the lock position is arranged at a position where the attachment of the endoscope is blocked, it is possible to prevent the use in the treatment from being started without releasing the lock.

  In the present invention, the lock member is a lock member supported so as to be swingable with respect to the main body, and engages with the press member when the lock member is in the lock position, so that the press member is not pressed. It is preferable that the lock member not hold the pressing member at the non-pressing position by being held at the position and not engaging with the pressing member at the non-locking position.

  This form shows one form of the lock member, and shows a form in which the lock member engages with the pressing member instead of the drive member. Locking and unlocking can be performed simply by swinging the lock member. Therefore, it is possible to easily adopt a configuration in which the lock by the lock member is automatically released by mounting the endoscope.

  In the present invention, the lock member includes an engagement portion that engages with the pressing member at the lock position, a support portion that swingably supports the engagement portion, and the inner portion at the lock position. It is preferable to include a blocking unit disposed at a position to block the mounting of the endoscope.

  This embodiment specifically shows the configuration of the lock member, and specifically shows the position where the engaging portion that engages with the pressing member and the blocking portion that prevents the attachment of the endoscope are arranged. It is.

  In the present invention, the lock member is a lock member supported so as to be swingable with respect to the main body, and engages with the drive member when the lock member is in the lock position, whereby the drive member is not pressed. A locking member that holds the pressing member in the non-pressing position by holding in the driving position and does not engage the driving member in the non-locking position. It is preferable that

  This form shows one form of the lock member, and shows a form in which the lock member engages with the drive member instead of the pressing member. Locking and unlocking can be performed simply by swinging the lock member. Therefore, it is possible to easily adopt a configuration in which the lock by the lock member is automatically released by mounting the endoscope.

  In the present invention, the lock member includes an engagement portion that engages with the pressing member at the lock position, a support portion that swingably supports the engagement portion, and the inner portion at the lock position. It is preferable to include a blocking unit disposed at a position to block the mounting of the endoscope.

  This embodiment specifically shows the configuration of the lock member, and specifically shows the position where the engaging portion that engages with the pressing member and the blocking portion that prevents the attachment of the endoscope are arranged. It is.

  In the present invention, the lock member is a lock member that is slidably supported with respect to the main body, and engages with the press member when the lock member is in the lock position, whereby the press member is moved to the non-press position. It is preferable that the locking member does not hold the pressing member at the non-pressing position by being held at the non-locking position and not engaging with the pressing member.

  This form shows one form of the lock member, and shows a form in which the lock member engages with the pressing member. By simply sliding the lock member, the lock and unlock can be performed. Therefore, it is possible to easily adopt a configuration in which the lock by the lock member is automatically released by mounting the endoscope.

  In the present invention, the main body includes a housing portion that houses the light guide connector of the endoscope in a direction orthogonal to a direction in which the pressing member is displaced, and the lock member is disposed in the housing portion. It is preferred that

  This form shows the suitable position which arrange | positions the slidable locking member concretely.

  In the present invention, the lock member is a lock member provided with a dummy part imitating the outer shape of the endoscope, and the position when the dummy part is attached to the endoscope insertion aid is determined. By setting the lock position, the position when the dummy portion is removed from the endoscope insertion aid is the non-lock position, and when the lock is in the lock position, the pressing member is engaged. It is preferable that the locking member not hold the pressing member at the non-pressing position by holding the pressing member at the non-pressing position and not engaging with the pressing member at the non-locking position.

  This form shows one form of the lock member, and shows a form in which the lock member engages with the pressing member. According to this embodiment, the tube can be locked in a non-pressed state if the dummy portion (dummy endoscope) of the lock member is attached to the endoscope insertion aid in the same manner as a real endoscope. It is also possible to prevent the endoscope from being attached in the locked state.

  In the present invention, the main body includes an accommodating portion in which the light guide connector of the endoscope is accommodated in a direction orthogonal to a direction in which the pressing member is displaced. It is preferable that the engaging portion of the locking member to be engaged is disposed in the accommodating portion.

  This form shows concretely the position where the engaging part of the lock member engaged with a press member is arranged in a locked state.

  ADVANTAGE OF THE INVENTION According to this invention, the malfunction that a crushing wrinkle attaches to a tube when the pressing state of a tube continues for a long time can be prevented. Further, it is possible to prevent the hand operating unit from being damaged when not in use.

Overall perspective view in which a rigid endoscope is attached to the insertion assisting tool of the embodiment The perspective view which looked at the form of Drawing 1 from the lower part Assembly perspective view of the sheath insertion part constituting the insertion aid Sectional view showing a tube for a direct-view endoscope Sectional view showing a tubular body for a perspective endoscope Assembly perspective view showing configuration of collet chuck Cross-sectional view explaining air / water switching by forward operation of the air / water lever Cross-sectional view explaining air / water supply switching by reverse operation of air / water supply lever Sectional drawing explaining switching of air / water supply by turning operation of air / water supply lever The perspective view which showed the structure of the operation mechanism of the handle part of an insertion auxiliary tool, and the locking mechanism of 1st Embodiment. Sectional drawing which showed the structure of the operating mechanism of the handle part of an insertion auxiliary tool, and the locking mechanism of 1st Embodiment Sectional drawing which showed the structure of the operating mechanism of the handle part of an insertion auxiliary tool, and the locking mechanism of 1st Embodiment The perspective view which showed the structure of the operation mechanism of the handle part of an insertion auxiliary tool, and the lock mechanism of 2nd Embodiment. Sectional drawing which showed the structure of the operation mechanism of the handle part of an insertion auxiliary tool, and the locking mechanism of 2nd Embodiment Sectional drawing which showed the structure of the operation mechanism of the handle part of an insertion auxiliary tool, and the locking mechanism of 2nd Embodiment The perspective view which showed the structure of the operation mechanism of the handle part of an insertion auxiliary tool, and the locking mechanism of 3rd Embodiment. Sectional drawing which showed the structure of the operation mechanism of the handle part of an insertion auxiliary tool, and the locking mechanism of 3rd Embodiment Sectional drawing which showed the structure of the operation mechanism of the handle part of an insertion auxiliary tool, and the locking mechanism of 3rd Embodiment The perspective view which showed the structure of the operation mechanism of the handle part of an insertion auxiliary tool, and the locking mechanism of 4th Embodiment. Sectional drawing which showed the structure of the operation mechanism of the handle part of an insertion auxiliary tool, and the lock mechanism of 4th Embodiment Sectional drawing which showed the structure of the operation mechanism of the handle part of an insertion auxiliary tool, and the lock mechanism of 4th Embodiment The perspective view which showed the structure of the operation mechanism of the handle part of an insertion auxiliary tool, and the lock mechanism of 5th Embodiment Sectional drawing which showed the structure of the operation mechanism of the handle part of an insertion auxiliary tool, and the locking mechanism of 5th Embodiment Sectional drawing which showed the structure of the operation mechanism of the handle part of an insertion auxiliary tool, and the locking mechanism of 5th Embodiment The perspective view which showed the structure of the operation mechanism of the handle part of an insertion auxiliary tool, and the lock mechanism of 6th Embodiment. Sectional drawing which showed the structure of the operation mechanism of the handle part of an insertion auxiliary tool, and the locking mechanism of 6th Embodiment Sectional drawing which showed the structure of the operation mechanism of the handle part of an insertion auxiliary tool, and the locking mechanism of 6th Embodiment

  Hereinafter, preferred embodiments of an endoscope insertion aid according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is an overall perspective view showing an endoscope insertion assisting tool (hereinafter referred to as an insertion assisting tool) 10 according to a first embodiment attached to a rigid endoscope 12, and FIG. It is the perspective view which looked at the form of from the bottom. FIG. 3 shows an assembled perspective view of the sheath insertion portion 14 constituting the insertion assisting tool 10.

  As shown in FIG. 3, the rigid endoscope 12 includes a main body portion 24 and an endoscope insertion portion 26 made of a rigid tube. A connector 28 protrudes from the main body 24. When the rigid endoscope 12 is used, the connector 28 is arranged to project upward from the U-shaped notch 34 of the main body 31 of the handle part (hand operation part) 30 constituting the insertion assisting tool 10 in FIG. . In this state, one end of the light guide cable 36 is connected to the connector 28, and the other end of the light guide cable 36 is connected to the external light source device 38.

  One end of a light guide (not shown) made of an optical fiber is fixed to the connector 28. The light guide is inserted and disposed in the endoscope insertion portion 26, and the other end of the light guide is extended so as to face the illumination window 40 provided on the distal end surface 27 of the endoscope insertion portion 26. . Therefore, the illumination light from the light source device 38 is guided to the illumination window 40 through the light guide cable 36 and the light guide, and is irradiated from the illumination window 40 to the observation site in the body cavity.

  An observation window 42 is provided on the distal end surface 27 of the endoscope insertion portion 26. The optical image of the observation site that has entered from the observation window 42 is imaged by an objective lens (not shown) on the imaging surface of an image guide (not shown) inserted and arranged in the endoscope insertion portion 26. The optical image is guided to the main body 24 through the image guide, and through an eyepiece 46 (see FIGS. 1 and 2) of the eyepiece 44 connected to the base end of the main body 24. Observed by the practitioner. In the present embodiment, the rigid endoscope 12 for observing the optical image of the observation site from the eyepiece unit 44 via the image guide is exemplified. However, the optical image is formed on the light receiving surface of the solid-state imaging device. Thus, an electronic endoscope that outputs an optical image as electronic image data may be used. Further, as shown in FIG. 1, by attaching a camera head 48 to the eyepiece 44 of the rigid endoscope 12 via an adapter 47, an optical image observed at the eyepiece 44 is converted into an electronic image by the camera head 48. It can also be converted to data and transmitted to a device such as a processor device to which a cable from the camera head 48 is connected.

  When the endoscope insertion portion 26 is inserted into the sheath insertion portion 14 to a predetermined position, the illumination window 40 and the observation window 42 of the endoscope insertion portion 26 are opened at the distal end opening (reference numeral in FIG. 3). 22) exposed.

  As shown in FIG. 2, the endoscope insertion portion 26 inserted into the sheath insertion portion 14 is fixed to the introduction tube 50 by a fastening operation of a collet chuck 52 provided on the introduction tube 50 of the sheath insertion portion 14. As a result, the insertion assisting tool 10 and the rigid endoscope 12 are fixed to each other to stabilize the treatment.

  The collet chuck 52 includes a collet portion 54 and a nut portion 56 as shown in FIG. The collet portion 54 includes three split grooves 58 formed at the proximal end portion of the introduction pipe 50 and a male screw 60 engraved on the surface of the proximal end portion of the introduction pipe 50. On the inner peripheral surface of the nut portion 56, a tapered female screw 62 that is screwed into the male screw 60 is formed. Therefore, when the female screw 62 of the nut portion 56 is screwed into the male screw 60 of the collet portion 54 and the nut portion 56 is rotated in the fastening direction, the collet portion 54 is pressed by the tapered female screw 62 to reduce its diameter, and the hard inner It is pressed by the endoscope insertion portion 26 of the endoscope 12. As a result, the insertion assisting tool 10 and the rigid endoscope 12 are fixed to each other by the collet chuck 52. The means for fixing the insertion assisting tool 10 and the rigid endoscope 12 may be a means other than the collet chuck 52.

  On the other hand, as shown in FIG. 3, the insertion assisting tool 10 is provided at the sheath insertion portion 14 as an outer tube into which the endoscope insertion portion 26 of the rigid endoscope 12 is inserted, and the proximal end portion of the sheath insertion portion 14. It is comprised from the handle | steering-wheel part 30 which a practitioner grasps and operates. The base end portion of the sheath insertion portion 14 is disposed through the support portion 64 provided in the main body 31 of the handle portion 30 and is integrally connected to the introduction tube 50 shown in FIG.

  As shown in FIG. 3, a lumen 16 into which the endoscope insertion portion 26 is inserted is formed in the sheath insertion portion 14 along the longitudinal axis A direction of the sheath insertion portion 14. Further, the diameter of the lumen 16 is slightly larger than the outer diameter of the endoscope insertion portion 26, the backlash of the endoscope insertion portion 26 with respect to the sheath insertion portion 14 hardly occurs, and the endoscope insertion portion. The size is such that 26 can be smoothly inserted into the sheath insertion portion 14. The sheath insertion portion 14 is preferably made of a resin such as polyethylene, polypropylene, urethane, silicon rubber, or polyvinyl chloride.

In addition, the sheath insertion portion 14 is formed with an air supply conduit 18 that is a fluid conduit and a water supply conduit 20 that is a fluid conduit in the longitudinal axis A direction. The air supply pipe 18 and the water supply pipe 20 are merged in the vicinity of the distal end portion of the sheath insertion portion 14, and the merge pipeline (not shown) communicates with a nozzle 68 provided at the distal end portion of the sheath insertion portion 14. Has been. The nozzle 68 is opened toward the center of the distal end opening 22 of the lumen 16. From the nozzle 68, feed air which has been supplied from the duct 18 (CO ₂ gas) and sending the air which has been supplied from the duct 18 and the water supply channel 20. (CO ₂ gas) and the washing water (the water) The mixed fluid is ejected. Therefore, the CO ₂ gas and the mixed fluid are switched and injected into the illumination window 40 and the observation window 42 of the endoscope insertion portion 26 inserted into the sheath insertion portion 14.

  Further, when the rigid endoscope 12 to which the sheath insertion portion 14 is attached is a direct-view rigid endoscope, the distal end opening 22 on the plane perpendicular to the longitudinal axis A as shown in FIG. What has is used. When the rigid endoscope 12 to which the sheath insertion portion 14 is attached is a perspective rigid endoscope, the sheath insertion portion 14 has a distal end opening 22 on a plane oblique to the longitudinal axis A as shown in FIG. Used. 4 and 5, reference numeral 25 denotes an observation window of the rigid endoscope 12 schematically shown.

  The air supply pipe 18 is opened to the outside through a port 70 shown in FIG. 6, and the water supply pipe 20 is opened to the outside through a port 72 shown in FIG.

One end of a gas supply tube 74 is connected to the port 70 as shown in FIG. This gas supply tube 74 is extended from the groove 76 provided in the main body 31 of the handle portion 30 to the outside through the opening 78 of the main body 31 shown in FIG. 3, and the other end is CO _{2 in} FIG. Connected to the supply device 80. Thereby, the CO ₂ gas from the CO ₂ supply device 80 is supplied to the nozzle 68 via the gas supply tube 74, the port 70, and the air supply pipe line 18.

  Further, one end of a liquid supply tube 82 is connected to the port 72 as shown in FIG. This liquid supply tube 82 is extended outside from the groove 84 provided in the main body 31 through the opening 86 of the main body 31 shown in FIG. 3, and the other end is connected to the water supply device 88 of FIG. The Thereby, water from the water supply device 88 is supplied to the nozzle 68 via the liquid supply tube 82, the port 72, and the water supply pipe line 20.

The handle portion 30 of the insertion assisting tool 10 rotates the air / water supply lever 32 (pressing operation), thereby injecting CO ₂ gas from the nozzle 68 at the tip of the sheath insertion portion 14 and a mixed fluid (CO ₂ gas). And an operation mechanism for switching on / off the injection of water.

  As shown in FIG. 1 to FIG. 3, the air / water feeding lever 32 has a connector 28 of the rigid endoscope 12 inserted and arranged in the U-shaped notch 34 of the main body 31 inserted in the central portion on the front side. 32A, and a pair of leg portions 32B and 32C disposed on the left and right sides of the opening 32A. A shaft protrudes from the tip of each leg portion 32B, 32C toward the inside in the left-right direction at a position that is coaxial, and these shafts are formed in shaft holes that are formed through the body 31 in the left-right direction. It is inserted and pivotally supported. Thereby, the air / water supply lever 32 is supported rotatably about the position of the shaft hole of the main body 31 as a rotation axis.

  The air / water supply lever 32 includes a pressing portion 32D to which a practitioner applies a pressing force at the rear end, and an inclined portion 32E that connects the leg portions 32B and 32C and the pressing portion 32D. . The pressing portion 32D is disposed along a substantially parallel plane passing through an upper position far from the longitudinal axis A of the sheath insertion portion 14 with respect to the plane along which the pair of leg portions 32B and 32C is along, and the inclined portion 32E is It arrange | positions along the plane which cross | intersects those planes. The inclined portion 32E is formed with an opening portion 32F communicating with the opening portion 32A.

  When the insertion assisting tool 10 is attached to the rigid endoscope 12 or when the insertion assisting tool 10 is removed from the rigid endoscope 12, the opening portion 32F is used by the connector 28 of the rigid endoscope 12 for air supply and water supply. A passage is formed that enters the U-shaped notch 34 of the main body 31 from the rear side of the lever 32 or exits from the U-shaped notch 34 to the rear side of the air / water feeding lever 32.

  The operating mechanism closes the tube by closing (closing) the tube by pressing (crushing) the tube against each of the gas supply tube 74 and the liquid supply tube 82 by rotating the air / water supply lever 32. It is configured to switch between a state and an open state in which the tube pressure (crush) is released and the tube line is opened.

  7 and 8 are schematic cross-sectional views showing components of the operation mechanism of the handle portion 30 from the rear side, and FIG. 9 is a schematic cross-sectional view shown from the side. As shown in FIGS. 7A to 7C and FIGS. 8A to 8C, in the grooves 76 and 84 in the main body 31 of the handle portion 30, the main body 31 (the upper side in the grooves 76 and 84). Each of the bar-shaped stoppers 90 and 92 is opposed to the wall surfaces 76B and 84B) with the gas supply tube 74 and the liquid supply tube 82 interposed therebetween. The stopper 90 moves up and down with respect to the main body 31 (wall surface portion 76B), whereby the gas supply tube 74 is pressed (collapsed) and released, and the pipeline of the gas supply tube 74 is closed or opened. Then, the stopper 92 moves up and down with respect to the main body 31 (wall surface portion 84B) so that the liquid supply tube 82 is pressed and released, so that the conduit of the liquid supply tube 82 is closed or opened. It has become.

  The stopper 90 is configured by bending one end portion extended from the torsion coil spring 94 at a right angle. Similarly, the stopper 92 is configured by bending one end portion extended from the torsion coil spring 96 at a right angle.

  The torsion coil springs 94 and 96 are fitted in shaft holes (not shown) whose axis is the left-right direction of the main body 31, and the other end portions of the torsion coil springs 94 and 96 are restricted from rotating around the shaft holes. In this state, the main body 31 is engaged. Further, inside the torsion coil springs 94 and 96 fitted in the shaft holes of the main body 31, shafts 98 projecting inwardly from the leg portions 32B and 32C of the air / water feeding lever 32 are fitted, An air / water supply lever 32 is rotatably supported by the main body 31. When the air / water supply lever 32 is not operated, the stoppers 90 and 92 are attached from the torsion coil springs 94 and 96 as shown in FIGS. 7 (A), 8 (C), and 9 (A). Due to the force, the stopper 90 presses and closes the gas supply tube 74, and the stopper 92 presses and closes the liquid supply tube 82. That is, both the gas supply tube 74 and the liquid supply tube 82 are closed.

In this state, as shown in FIG. 9B, when the air / water supply lever 32 is rotated clockwise about the shaft 98, the pressing member 100 protruding from the back surface of the air / water supply lever 32 is provided. 7A to 7B, the stopper 90 is pushed down against the urging force of the torsion coil spring 94. Thereby, the pipeline of the gas supply tube 74 is opened as shown in FIG. In the state shown in FIG. 7B, the liquid supply tube 82 is in a closed state in which the conduit is closed by being pressed by the stopper 92. Therefore, only CO ₂ gas is injected from the nozzle 68 at the distal end of the sheath insertion portion 14 shown in FIG.

Further, when the air / water supply lever 32 is rotated in the clockwise direction around the shaft 98, the pressing member 102 protruding from the back surface of the air / water supply lever 32 is shown in FIG. As shown in FIG. 7C, the stopper 92 is pushed down against the urging force of the torsion coil spring 96. Thereby, the conduit of the liquid supply tube 82 is opened as shown in FIG. Accordingly, since the liquid supply tube 82 is also opened after the gas supply tube 74, a mixed fluid of CO ₂ gas and cleaning water is ejected from the nozzle 68 at the distal end of the sheath insertion portion 14. 7A, the pressing member 102 is not in contact with the torsion coil spring 96 in the range of the operation position of the air / water supply lever 32 until the gas supply tube 74 is changed from the closed state to the open state. As shown in FIG. 7B, the torsion coil spring 96 is brought into contact with at least the gas supply tube 74 in the open state in which the conduit is completely opened.

Therefore, by rotating (pushing down) the air / water supply lever 32 in two stages, the CO ₂ gas and the mixed fluid can be switched to be supplied to the nozzle 68 and injected from the nozzle 68. This switching can be achieved by the action of the pressing members 100 and 102 having different lengths.

Actual operation during treatment, first, by rotating the air water lever 32 to the position shown in FIG. 7 (B) from the position of FIG. 7 (A), an illumination window 40 and observation of the CO ₂ gas from the nozzle 68 It sprays on the window 42 and blows off blood, body fluid, etc. adhering to the illumination window 40 and the observation window 42.

  Next, the air / water supply lever 32 is rotated from the position shown in FIG. 7B to the position shown in FIG. 7C, and the mixed fluid is ejected from the nozzle 68 to the illumination window 40 and the observation window 42 to illuminate. The window 40 and the observation window 42 are cleaned.

Then, by rotating in the opposite direction the air water lever 32 from the position shown in FIG. 8 (A) (same as the position of FIG. 7 (C)) to the position in FIG. 8 (B), CO ₂ gas from the nozzle 68 Is sprayed onto the illumination window 40 and the observation window 42 to dry the illumination window 40 and the observation window 42. Thereafter, the air / water supply lever 32 is returned from the position of FIG. 8B to FIG. 8C (same as the position of FIG. 7A), and the supply of CO ₂ gas is stopped. The operation procedure of the air / water supply lever 32 has been described above.

When the air supply / water supply lever 32 is rotated between the positions shown in FIGS. 7A and 7B and the gas supply tube 74 is slightly opened, a small amount of CO ₂ gas is generated from the nozzle 68. It is injected into the illumination window 40 and the observation window 42. Thus, the front surface of the illumination window 40 and observation window 42, the gas curtain by CO ₂ gas is formed, can be reduced fouling of the illumination window 40 and observation window 42.

Next, a lock mechanism for the operation mechanism incorporated in the handle portion 30 in order to switch on / off of the injection of CO ₂ gas and mixed gas from the nozzle 68 will be described.

  In the operation mechanism incorporated in the handle portion 30 described above, the gas supply tube 74 and the liquid supply tube 82 are pressed (collapsed) when the air / water supply lever 32 is not operated, and in this state, the operation is continued for a long time. After the lapse of time, the gas supply tube 74 and the liquid supply tube 82 are crushed, and even if the pressure is released by the rotation operation of the air / water supply lever 32 at the time of treatment, the respective pipelines are not completely opened. There is a fear. Therefore, it is preferable to provide a lock mechanism that locks the gas supply tube 74 and the liquid supply tube 82 so that the gas supply tube 74 and the liquid supply tube 82 are released from being pressed even when the air / water supply lever 32 is not operated.

  10 to 12 are views showing a mode in which the handle portion 30 is provided with the lock mechanism of the first embodiment. FIG. 10 is an enlarged view of the handle portion 30 shown in the perspective view of FIG. FIG. 11 is a schematic cross-sectional view schematically showing components of the operation mechanism and the lock mechanism of the handle portion 30 from the rear side, and FIG. 12 is a cross-sectional view shown from the side.

  As shown in FIGS. 10 to 13, the lock mechanism of the present embodiment includes through holes 112 and 114 formed through the leg portions 32 </ b> B and 32 </ b> C of the air / water supply lever 32, and the through holes 112. , 114 is removably inserted into the lock pin 110.

  The through-holes 112 and 114 are holes formed so as to penetrate in the left-right direction, and are formed at opposing positions where the axes of the two through-holes 112 and 114 coincide with each other in the leg portions 32B and 32C.

  When the air / water supply lever 32 is in a non-operating state, as shown in FIG. 11B, the shafts of the through-holes 112 are arranged above the main body 31 or at a position blocked by the main body 31. ing. On the other hand, the air / water supply lever 32 is pushed down by a certain amount or more, and both the gas supply tube 74 and the liquid supply tube 82 are completely opened as shown in FIGS. In the open position), the main body 31 is not disposed on the axes of the two through holes 112 and 114.

  That is, the two through-holes 112 and 114 are rotated positions (hereinafter referred to as reference positions) when the air / water supply lever 32 is in a non-operation state in which both the gas supply tube 74 and the liquid supply tube 82 are closed. In the state where the rotation range is set to the rotation position where both the gas supply tube 74 and the liquid supply tube 82 are fully opened, the main body 31 is placed on the shafts of the through holes 112 and 114. In the state where the air / water supply lever 32 is set to the rotational position in which both the gas supply tube 74 and the liquid supply tube 82 are fully opened, their positions are The main body 31 and other members are not formed on the shafts of the through holes 112 and 114 at positions where they exist.

  The lock pin 110 includes a pin body 110A formed in a long shape (for example, a columnar shape in the present embodiment) by a hard material such as metal, and a base that is formed in an annular shape on one end side of the pin body 110A. It is comprised from the edge part 110B.

  The pin body 110 </ b> A has an outer diameter (maximum width) that can be inserted into the through holes 112 and 114 in a cross section orthogonal to the longitudinal axis. Further, the length in the longitudinal axis direction is longer than the interval between the side wall surfaces 33A and 33B (see FIG. 11) which are outside in the left and right direction of the two legs 32B and 32C of the air / water feeding lever 32. Is formed.

  The operation of the above locking mechanism will be described. In the non-locked state and the non-operated state, as shown in FIG. 11B, both the gas supply tube 74 and the liquid supply tube 82 are pressed by the stoppers 90 and 92. It is in the closed state in which those pipelines are completely blocked. On the other hand, when the air / water supply lever 32 is pushed down from the reference position by a certain amount or more, the gas supply tube 74 and the liquid supply tube 82 are both moved to the fully open state (non-pressed state). Then, as shown in FIG. 10, the main body 31 and other members do not exist on the axes of the two through holes 112 and 114. At this time, the distal end side of the pin body 110A opposite to the base end portion 110B of the lock pin 110 is set to an arbitrary through hole (for example, the through hole 114 as shown in FIG. 10) of the through holes 112 and 114. When the pin body 110A is inserted from the outer side wall surface 33B and inserted in the axial direction of the through holes 112, 114, the tip side of the pin body 110A passes through the other through hole 112 without being obstructed by other members. To do. When the pin main body 110A is inserted to a position where the base end portion 110B of the lock pin 110 is at least in contact with the side wall surface 33B of the through-hole 114, the pin main body 110A has two positions as shown in FIGS. It is set to a state where the through holes 112 and 114 are inserted.

  After the pin main body 110A is set in the state of being inserted through the two through holes 112 and 114 in this way, when the push operation of the air / water supply lever 32 is released, the air supply is performed by the action of the torsion coil springs 94 and 96. Although a biasing force for returning the water supply lever 32 to the reference position works, the gas supply tube 74 and the liquid supply tube 82 are not pressed by the stoppers 90 and 92 as shown in FIGS. Within the range of the rotation position of the air / water supply lever 32, the pin main body 110 </ b> A contacts the lower side of the main body 31 (the lower edges of the grooves 76 and 84). Thereby, the rotation of the air / water supply lever 32 is restricted, and both the gas supply tube 74 and the liquid supply tube 82 are locked in a non-pressed state in which the gas supply tube 74 and the liquid supply tube 82 are completely opened.

  On the other hand, if the pin body 110A of the lock pin 110 is pulled out from both the through holes 112 and 114 in the locked state, the lock is released, and both the gas supply tube 74 and the liquid supply tube 82 as shown in FIG. The air / water supply lever 32 rotates and stops at the reference position where is closed, and is in an unlocked state.

  According to the above locking mechanism, the operation mechanism incorporated in the handle portion 30 is locked by the locking mechanism, whereby the gas supply tube 74 and the liquid supply tube 82 are held in a non-pressed state. Even if it continues for a long time, the problem that the gas supply tube 74 and the liquid supply tube 82 are crushed and wrinkled is prevented. Therefore, when a long time elapses after the insertion assisting tool 10 is prepared in a usable state, it is preferable that the insertion assisting tool 10 be locked by the lock mechanism.

  In addition, by providing the lock mechanism, it is possible to store the operation mechanism of the handle portion 30 in a state in which the gas supply tube 74 and the liquid supply tube 82 are assembled and store them for a long time. Therefore, for example, if the operation mechanism is assembled in a state in which the gas supply tube 74 and the liquid supply tube 82 are assembled at the product shipment stage, and the lock mechanism is used to lock the operation mechanism, preparation time and time for use in the treatment can be reduced. Can do.

  Further, when the insertion assisting tool 10 is sterilized with ethylene oxide gas or the like by a gas sterilizer or the like, the operation mechanism is locked by the lock mechanism, and the gas supply tube 74 and the liquid supply tube 82 are held in a non-pressed state. As a result, the gas for sterilization can sufficiently turn around the gas supply tube 74 and the liquid supply tube 82, the air supply line 18 and the water supply line 20 of the sheath insertion portion 14 to which the gas supply tube 74 and the liquid supply tube 82 are connected. Sterilization will be performed properly. It is also suitable for sterilization by other methods such as autoclave sterilization, stellar sterilization, and gamma ray sterilization other than gas sterilization. In addition, there is an advantage that bacteria are difficult to accumulate.

Furthermore, according to the lock mechanism described above, the use of the insertion assisting tool 10 is prevented when the operation mechanism is locked by the lock mechanism. That is, when the fluid is sent from the CO ₂ supply device 80 and the water supply device 88 to the gas supply tube 74 and the liquid supply tube 82 in the locked state as shown in FIG. 11A, the fluid is ejected from the nozzle 68 at the same time. This can lead to unexpected situations. Therefore, the insertion assisting tool 10 cannot be attached to the rigid endoscope 12 in the locked state.

  The function for preventing the insertion assisting tool 10 from being used in the locked state will be described. As shown in FIGS. 10, 11A, and 12, the pin body 110A of the lock pin 110 is inserted into the through holes 112 and 114. When the lock state is set, the pin main body 110 </ b> A is disposed below the U-shaped notch 34 of the main body 31 of the handle portion 30. Therefore, when the insertion assisting tool 10 is to be attached to the rigid endoscope 12 in the locked state, the connector 28 of the rigid endoscope 12 can be inserted into the U-shaped notch 34 by the pin body 110A of the lock pin 110. Be blocked. Thus, the operator can know that the operation mechanism is in the locked state when the insertion assisting tool 10 is attached to the rigid endoscope 12, and the use of the insertion assisting tool 10 in the locked state can be prevented. Is done.

  The position at which the lock pin 110 inserted through the through holes 112 and 114 is disposed is a position that prevents the rigid endoscope 12 from being attached to the insertion assisting tool 10 (a position that prevents the rigid endoscope 12 from being attached). ) May be arranged anywhere, for example, an area (endoscope arrangement area) where any part of the rigid endoscope 12 attached to the insertion aid 10 is arranged, or insertion When the rigid endoscope 12 is attached to the assisting tool 10, a region through which any portion of the rigid endoscope 12 always passes, that is, the vicinity on the rear side that is near the rear side with respect to the endoscope arrangement region If the position overlaps at least a part of the region, it is possible to reliably prevent the rigid endoscope 12 from being mounted in the locked state.

  Next, a lock mechanism according to a second embodiment will be described. FIGS. 13 to 15 are views showing a mode in which the lock mechanism according to the second embodiment is provided on the handle portion 30, and FIG. 13 is an enlarged view of the handle portion 30 shown in the perspective view of FIG. FIG. 14 is a schematic cross-sectional view schematically showing components of the operation mechanism and the lock mechanism of the handle portion 30 from the rear side, and FIG. 15 is a cross-sectional view shown from the side.

  As shown in FIGS. 13 to 15, the lock mechanism of the present embodiment includes a base 120 and a lever 122.

  The base 120 is, for example, a plate-like body extending or connected from the sheath insertion portion 14 or the main body 31 (support portion 64 or the like) of the handle portion 30, and is a rigid endoscope attached to at least the insertion assisting tool 10. It is arranged at a position avoiding the area where the mirror 12 is arranged.

  In addition, shaft holes (not shown) for pivotally supporting the lever portion 122 are formed on the left and right side surfaces of the base portion 120.

  The lever portion 122 includes two left and right leg portions 128 and 130 and an insertion preventing portion 132 that is laid between the leg portions 128 and 130 in the left-right direction to connect the leg portion 128 and the leg portion 130. These leg portions 128 and 130 and the insertion preventing portion 132 are integrally formed.

  Axis pins 128A, 130A project from the lower ends of the leg portions 128, 130 at coaxial positions, and the shaft pins 128A, 130A are respectively inserted into the shaft holes of the base 120. Has been. Accordingly, the lever portion 122 is supported by the base portion 120 so as to be swingable as shown in FIG. 15 with the shaft pins 128A and 130A as fulcrums.

  Engagement portions 128 </ b> B and 130 </ b> B project from the upper ends of the leg portions 128 and 130 toward the rear side. As will be described later, when the operation mechanism is locked by the lock mechanism of the present embodiment, the engaging portions 128B and 130B engage the stoppers 90 and 92 as shown in FIGS. It is like that.

  The insertion preventing portion 132 is installed between the leg portion 128 and the leg portion 130 in the left-right direction. As shown in FIG. 14 (A), the swinging position of the lever portion 122 in the locked state and FIG. In any of the swinging positions of the lever portion 122 in the non-locked state as in (2), it is disposed at a position above the proximal end opening that does not overlap the proximal end opening of the lumen 16 in the front-rear direction.

  The operation of the above locking mechanism will be described. In the unlocked state and the non-operated state, both the gas supply tube 74 and the liquid supply tube 82 are pressed by the stoppers 90 and 92 as shown in FIG. These pipes are in a closed state where they are completely closed.

  On the other hand, the air / water supply lever 32 is pushed down from the reference position (rotation position in the non-operating state) by a certain amount or more, and both the gas supply tube 74 and the liquid supply tube 82 are completely opened (non-pressed state). When the lever portion 122 is raised in the vertical direction, the engaging portions 128B and 130B of the lever portion 122 lock the stoppers 90 and 92 as shown in FIG. It will be a position that can be. Then, when the pressing operation of the air / water supply lever 32 is released, the urging force to return to the reference position acts on the air / water supply lever 32 by the action of the torsion coil springs 94, 94, but FIG. As shown in FIG. 15, the stoppers 90 and 92 are hooked on the engaging portions 128B and 130B, and the stoppers 90 and 92 are locked to the engaging portions 128B and 130B. Thereby, the gas supply tube 74 and the liquid supply tube 82 are not pressed by the stoppers 90 and 92, and both the gas supply tube 74 and the liquid supply tube 82 are locked in a non-pressed state in which they are completely opened.

  On the other hand, when the lever portion 122 is swung from the solid line position to the broken line position by pushing the upper portion of the lever portion 122 forward as shown in FIG. 15 in the locked state, the stoppers 90 and 92 are engaged with the engaging portions 128B, The lock is released from 130B. As a result, as shown in FIG. 15B, the air / water supply lever 32 rotates and stops at the reference position where both the gas supply tube 74 and the liquid supply tube 82 are closed, and the unlocked state is established.

  Further, the locking mechanism of the second embodiment also has a function of preventing the insertion assisting tool 10 from being used in the locked state, and when the insertion assisting tool 10 is attached to the rigid endoscope 12. It is possible to automatically switch from the locked state to the unlocked state.

  That is, in the locked state, as shown in FIGS. 13 and 14A, the insertion preventing portion 132 of the lever portion 122 is inserted into the U of the main body 31 of the handle portion 30 into which the connector 28 of the rigid endoscope 12 is inserted. The lower side of the character-shaped notch 34 is disposed closer to the rear side. Accordingly, when the insertion assisting tool 10 is to be attached to the rigid endoscope 12 in the locked state, the connector 28 of the rigid endoscope 12 abuts against the insertion preventing portion 132 of the lever portion 122, and the connector 28 of the rigid endoscope 12. Is prevented from being inserted into the U-shaped cutout 34. Thereby, the operator can know that the operation mechanism is in the locked state.

  Further, when the connector 28 of the rigid endoscope 12 abuts against the insertion preventing portion 132 and then the connector 28 is pushed into the distal end side of the U-shaped notch 34 as it is, the lever portion 122 as shown by the broken line in FIG. Is pushed forward and unlocked, and the unlocked state is obtained as shown in FIG. At this time, the insertion preventing portion 132 is also moved to the front side and retracted from the endoscope placement area (the area where the rigid endoscope 12 attached to the insertion assisting tool 10 is placed). The insertion assisting tool 10 can be attached to the rigid endoscope 12 by being inserted to a predetermined position of the notch 34.

  As described above, according to the lock mechanism of the present embodiment, when the insertion assisting tool 10 is mounted on the rigid endoscope 12, the lock is automatically released, so that a special work for releasing the lock is performed. It becomes unnecessary. Other effects of the lock mechanism according to the present embodiment are the same as those of the lock mechanism according to the first embodiment, and a description thereof will be omitted.

  Note that the insertion preventing unit 132 is disposed at a position that prevents the rigid endoscope 12 from being mounted (for example, a position that overlaps at least one of the endoscope placement region and the rear-side vicinity region) in the locked state. The rigid endoscope 12 may be disposed at a position that does not prevent the rigid endoscope 12 from being mounted when in the unlocked state. For example, when the endoscope is in the locked state, the proximal end side opening of the lumen 16 of the sheath insertion portion 14 may be used. Thus, it may be arranged at a position where at least a part thereof overlaps in the front-rear direction, and at a position where it is retracted to a position below the base end side opening in the unlocked state.

  Next, a lock mechanism according to a third embodiment will be described. 16 to 18 are views showing a mode in which the lock mechanism according to the third embodiment is provided on the handle portion 30, and FIG. 16 is an enlarged view of the handle portion 30 shown in the perspective view of FIG. FIG. 17 is a schematic cross-sectional view schematically showing components of the operation mechanism and the lock mechanism of the handle portion 30 from the rear side, and FIG. 18 is a cross-sectional view shown from the side.

  As shown in FIGS. 16 to 18, the locking mechanism of the present embodiment includes a lever member 140 that is supported so as to be swingable on the main body 31 of the handle portion 30.

  The lever member 140 includes two left and right leg portions 142 and 144 and an insertion preventing portion 146 that is installed in the left and right direction at the lower end of the leg portions 142 and 144 and connects the leg portion 142 and the leg portion 144. These leg portions 142 and 144 and the insertion preventing portion 146 are integrally formed.

  Shaft pins 142A and 144A (see FIG. 17) are projected from the upper ends of the leg portions 142 and 144 at coaxial positions, and the shaft pins 142A and 144A are respectively provided in the grooves of the main body 31. It is inserted in a shaft hole (not shown) formed in the wall surface in 76, 84. Accordingly, the lever member 140 is supported by the main body 31 so as to be swingable about the shaft pins 142A and 144A.

  Protrusions 152 and 154 projecting outward are formed on the outer surfaces of the leg portions 142 and 144 in the left-right direction. As will be described later, when the operation mechanism is locked by the lock mechanism of the present embodiment, as shown in FIGS. 17A and 18, these protrusions 152 and 154 are connected to the air / water supply lever 32. It is sandwiched between the upper surfaces of the leg portions 32B and 32C and the lower side of the main body 31 (lower edge portions of the grooves 76 and 84). Thereby, the rotation of the air / water supply lever 32 is restricted, and both the gas supply tube 74 and the liquid supply tube 82 are locked in a non-pressed state in which the gas supply tube 74 and the liquid supply tube 82 are completely opened.

  The insertion preventing portion 146 is provided between the leg portion 142 and the leg portion 144 in the left-right direction. As shown in FIG. 17A, the insertion preventing portion 146 is provided at the swing position of the lever member 140 in the locked state. It is disposed at a position overlapping with the proximal end opening in the front-rear direction, and does not overlap with the proximal end opening of the lumen 16 in the front-rear direction at the swinging position of the lever member 140 in the unlocked state as shown in FIG. In this case, it is retracted to a position above the base end side opening.

  Further, each of the leg portions 32B and 32C of the air / water supply lever 32 is formed with protruding portion passage grooves 160 and 162 communicating with the side wall surfaces 33C and 33D which are inward in the left-right direction from the upper end to the lower end. (See FIGS. 16 and 18). These protrusion-passing grooves 160 and 162 are such that the protrusions 152 and 154 of the lever member 140 do not interfere with the legs 32B and 32C of the air / water supply lever 32 at the swinging position of the lever member 140 in the unlocked state. A space is formed.

  That is, as shown in FIGS. 16, 17A, and 18 (solid line), the protrusions 152 and 154 of the lever member 140 are connected to the upper surfaces of the legs 32B and 32C of the air / water supply lever 32 and the lower side of the main body 31 (see FIG. The lever member 140 is indicated by a broken line in FIG. 18 by pushing the lower side (insertion preventing portion 146 side) of the lever member 140 forward from the locked state sandwiched between the lower edges of the grooves 76 and 84. Thus, if it rocks | fluctuates to the front side, the projection parts 152 and 154 will also move to the front side. At this time, as shown in FIG. 17B, the protrusions 152 and 154 pass through the protrusion passage grooves 160 and 162 of the legs 32B and 32C of the air / water supply lever 32 as shown in FIG. The water supply lever 32 can return to the reference position, and the gas supply tube 74 and the liquid supply tube 82 can be set in an unlocked state in which both are closed.

  The operation of the above locking mechanism will be described. In the non-locked state and the non-operated state, both the gas supply tube 74 and the liquid supply tube 82 are pressed by the stoppers 90 and 92 as shown in FIG. These pipes are in a closed state where they are completely closed. Further, the protrusions 152 and 154 of the lever member 140 are arranged at positions below the air / water supply lever 32.

  On the other hand, the lever member 140 is swung to the front side so that the protrusions 152 and 154 pass through the protrusion passage grooves 160 and 162 of the legs 32B and 32C of the air / water supply lever 32, and the It is assumed that the air / water supply lever 32 is pushed down from the reference position (position in a non-operating state). At this time, the protrusions 152 and 154 of the lever member 140 completely pass through the protrusion passage grooves 160 and 162 of the air / water supply lever 32 and reach a position above the upper surface of the air / water supply lever 32. Then, the air / water supply lever 32 is pushed down. Then, when the lever member 140 is swung rearward and the pressing operation of the air / water supply lever 32 is released, the torsion coil springs 94 and 94 return to the reference position with respect to the air / water supply lever 32. Although the urging force works, as shown in FIGS. 17A and 18, the projections 152 and 154 come into contact with the upper surfaces of the leg portions 32B and 32C of the air / water supply lever 32, and the air / water supply lever 32 rotates. Is regulated. Accordingly, the gas supply tube 74 and the liquid supply tube 82 are not pressed by the stoppers 90 and 92, and both the gas supply tube 74 and the liquid supply tube 82 are locked in a non-pressed state where the gas supply tube 74 and the liquid supply tube 82 are completely opened.

  On the other hand, in the locked state, when the lever portion 122 is swung from the solid line position to the broken line position by pushing the lower part of the lever member 140 forward as shown in FIG. The lever 32 moves to the position of the protrusion passage grooves 160 and 162, and the restriction of the rotation of the air / water supply lever 32 is released. Then, as the protrusions 152 and 154 pass through the protrusion passage grooves 160 and 162, the gas is supplied to the reference position where both the gas supply tube 74 and the liquid supply tube 82 are closed as shown in FIG. The water supply lever 32 is rotated and stopped, and is brought into an unlocked state.

  In the locking mechanism of the third embodiment, a function for preventing the insertion assisting tool 10 from being used in the locked state is provided as in the second embodiment, and the insertion assisting tool 10 Can be automatically switched from the locked state to the unlocked state when the robot is mounted on the rigid endoscope 12.

  That is, in the locked state, as shown in FIGS. 16 and 17A, the insertion preventing portion 146 of the lever member 140 is arranged at a position overlapping the proximal end side opening of the lumen 16 of the sheath inserting portion 14 in the front-rear direction. ing. Accordingly, when the insertion assisting tool 10 is to be attached to the rigid endoscope 12 in the locked state, the endoscope insertion portion 26 of the rigid endoscope 12 abuts against the insertion preventing portion 146 of the lever member 140, and the sheath insertion portion 14. The insertion of the endoscope insertion portion 26 into the lumen 16 is prevented. Thereby, the operator can know that the operation mechanism is in the locked state.

  Further, after the endoscope insertion portion 26 abuts against the insertion prevention portion 146, when the endoscope insertion portion 26 is pushed into the proximal end side opening of the lumen 16 as it is, the lever member 140 as shown by the broken line in FIG. Is pushed forward, the lock is released, and an unlocked state is obtained as shown in FIG. At this time, since the insertion preventing portion 146 also moves forward and retracts from the endoscope placement area, the insertion assisting tool 10 can be attached to the rigid endoscope 12.

  As described above, according to the lock mechanism of the present embodiment, when the insertion assisting tool 10 is mounted on the rigid endoscope 12, the lock is automatically released, so that a special work for releasing the lock is performed. It becomes unnecessary. Other effects of the lock mechanism according to the present embodiment are the same as those of the lock mechanism according to the first embodiment, and a description thereof will be omitted.

  Note that the insertion preventing unit 146 is disposed at a position that prevents the rigid endoscope 12 from being attached (for example, a position that overlaps at least one of the endoscope placement area and the rear-side vicinity area) in the locked state. The rigid endoscope 12 may be disposed at a position that does not prevent the rigid endoscope 12 from being mounted when in the unlocked state. For example, similar to the insertion preventing unit 132 in the second embodiment, In any of the unlocked states, the sheath insertion portion 14 may be disposed at a position above the proximal end opening that does not overlap with the proximal end opening of the lumen 16 in the front-rear direction.

  Next, a lock mechanism according to a fourth embodiment will be described. 19 to 21 are views showing a mode in which the lock mechanism according to the fourth embodiment is provided on the handle portion 30, and FIG. 19 is an enlarged view of the handle portion 30 shown in the perspective view of FIG. FIG. 20 is a schematic cross-sectional view schematically showing components of the operation mechanism and the lock mechanism of the handle portion 30 from the rear side, and FIG. 21 is a cross-sectional view shown from the side.

  As shown in FIGS. 19 to 21, the lock mechanism of the present embodiment includes a lever member 170 that is supported so that the main body 31 of the handle portion 30 can swing.

  The lever member 170 has two right and left leg portions 172 and 174 and an insertion preventing portion 176 that is installed in the left and right direction at the lower end of the leg portions 172 and 174 and connects the leg portion 172 and the leg portion 174. The leg portions 172 and 174 and the insertion preventing portion 176 are integrally formed.

  Shaft pins 172A and 174A are projected from the upper ends of the leg portions 172 and 174 at coaxial positions (see FIG. 20), and the shaft pins 172A and 174A are respectively grooves in the main body 31. 76 and 84 are fitted into shaft holes (not shown) formed in the wall surface. As a result, as shown by the solid and broken lines in FIG. 21, the lever member 170 is supported by the main body 31 so as to be swingable about the shaft pins 172A and 174A. Note that the lever member 170 is restricted by a stopper (not shown) from swinging rearward from a state in which the leg portions 172 and 174 are in a substantially vertical direction (a state in which later-described extending portions 182 and 184 are substantially horizontal). ing.

  At the upper end portions of the leg portions 172 and 174, extension portions 182 and 184 extending toward the rear side are formed. As will be described later, when the operation mechanism is locked by the lock mechanism of the present embodiment, these extending portions 182 and 184 engage the stoppers 90 and 92 as shown in FIGS. It is like that.

  The insertion preventing portion 176 is provided between the leg portion 172 and the leg portion 174 in the left-right direction. As shown in FIG. 20A, the swinging position of the lever member 170 in the locked state and FIG. In any of the swinging positions of the lever member 170 in the non-locked state as shown in FIG. 9, the lever member 170 is disposed at a position above the proximal end opening that does not overlap the proximal end opening of the lumen 16 in the front-rear direction.

  The operation of the above locking mechanism will be described. In the non-locked state and the non-operated state, both the gas supply tube 74 and the liquid supply tube 82 are pressed by the stoppers 90 and 92 as shown in FIG. These pipes are in a closed state where they are completely closed. On the other hand, the air / water supply lever 32 is pushed down from the reference position by a certain amount or more, and the gas supply tube 74 and the liquid supply tube 82 are both moved to the fully open state (non-pressed state). At the same time, when the lever member 170 is swung to the rear side and swung to the swinging position regulated by the stopper, the extension portions 182 and 184 of the lever portion 122 respectively push the stoppers 90 and 92 as shown in FIG. This is the position where it can be locked. Then, when the pressing operation of the air / water supply lever 32 is released, the urging force to return to the reference position acts on the air / water supply lever 32 by the action of the torsion coil springs 94, 94, but FIG. As shown in FIG. 21, the stoppers 90 and 92 are hooked on the extending portions 182 and 184, and the stoppers 90 and 92 are locked to the extending portions 182 and 184. Thereby, the gas supply tube 74 and the liquid supply tube 82 are not pressed by the stoppers 90 and 92, and both the gas supply tube 74 and the liquid supply tube 82 are locked in a non-pressed state in which they are completely opened.

  On the other hand, in the locked state, when the lever member 170 is swung from the solid line position to the broken line position by pushing the lower part of the lever member 170 forward as shown in FIG. It is released from 184 and the lock is released. As a result, as shown in FIG. 20B, the air / water supply lever 32 rotates and stops at the reference position where both the gas supply tube 74 and the liquid supply tube 82 are closed, and the unlocked state is established.

  The locking mechanism according to the fourth embodiment is also provided with a function for preventing the insertion aid 10 from being used in the locked state, and when the insertion aid 10 is attached to the rigid endoscope 12. It is possible to automatically switch from the locked state to the unlocked state.

  That is, in the locked state, as shown in FIGS. 19 and 20A, the insertion preventing portion 176 of the lever member 170 is below the U-shaped cutout portion 34 into which the connector 28 of the rigid endoscope 12 is inserted. On the side, it is arranged closer to the rear side. Accordingly, when the insertion assisting tool 10 is to be attached to the rigid endoscope 12 in the locked state, the connector 28 of the rigid endoscope 12 comes into contact with the insertion preventing portion 176 of the lever member 170, and the connector 28 of the rigid endoscope 12. Is prevented from being inserted into the U-shaped cutout 34. Thereby, the operator can know that the operation mechanism is in the locked state.

  Further, after the connector 28 of the rigid endoscope 12 abuts against the insertion preventing portion 176, when the connector 28 is pushed toward the distal end side of the U-shaped cutout portion 34 as it is, the lever member 170 as shown by the broken line in FIG. Is pushed to the front side to release the lock, and an unlocked state is obtained as shown in FIG. At this time, since the insertion preventing portion 176 also moves forward and retracts from the endoscope placement area, the connector 28 is inserted to a predetermined position of the U-shaped cutout portion 34 to insert the insertion assisting tool 10 into the rigid endoscope. It can be attached to the mirror 12.

  As described above, according to the lock mechanism of the present embodiment, when the insertion assisting tool 10 is mounted on the rigid endoscope 12, the lock is automatically released, so that a special work for releasing the lock is performed. It becomes unnecessary. Other effects of the lock mechanism according to the present embodiment are the same as those of the lock mechanism according to the first embodiment, and a description thereof will be omitted.

  The insertion preventing portion 176 is disposed at a position that prevents the rigid endoscope 12 from being attached (for example, a position that overlaps at least one of the endoscope placement area and the rear-side vicinity area) in the locked state. The rigid endoscope 12 may be disposed at a position that does not prevent the rigid endoscope 12 from being mounted when in the unlocked state. For example, when the endoscope is in the locked state, the proximal end side opening of the lumen 16 of the sheath insertion portion 14 may be used. Thus, it may be arranged at a position where at least a part thereof overlaps in the front-rear direction, and may be arranged at a position where it is retracted to a position above the proximal end opening in the unlocked state.

  Next, a lock mechanism according to a fifth embodiment will be described. 22 to 24 are views showing a mode in which the lock mechanism according to the fifth embodiment is provided in the handle portion 30, and FIG. 22 is an enlarged view of the handle portion 30 shown in the perspective view of FIG. FIG. 23 is a schematic cross-sectional view schematically showing components of the operation mechanism and the lock mechanism of the handle portion 30 from the rear side, and FIG. 24 is a cross-sectional view shown from the side.

  As shown in FIGS. 22 to 24, the lock mechanism of the present embodiment includes a slide member 200 supported so as to be slidable in the front-rear direction at the U-shaped notch 34 of the main body 31 of the handle portion 30.

  The slide member 200 is a plate-like body formed of, for example, a synthetic resin, and both left and right edges thereof are fitted into guide grooves 202 and 204 formed at the left and right upper ends of the U-shaped notch 34. It is slidably supported in the front-rear direction.

  Flange portions 206 and 208 projecting inward from the inner wall surfaces of the grooves 76 and 84 of the main body 31 are formed at the upper end portion of the U-shaped cutout portion 34, and the projecting ridge projecting inwardly below them. Portions 210 and 212 are formed, and the guide grooves 202 and 204 are formed by recesses between the flange portions 206 and 208 and the protrusions 210 and 212. As will be described later, when the operation mechanism is locked by the lock mechanism of the present embodiment, the lower surface of the slide member 200 is disposed at a position where it abuts against the stoppers 90 and 92 as shown in FIGS. Thus, the stoppers 90 and 92 are locked. In the present embodiment and the next sixth embodiment, the U-shaped cutout 34 is formed so that the front ends of the stoppers 90 and 92 are inserted through the cutouts 76A and 84A formed in the grooves 76 and 84, respectively. Projects within the range of. In the present embodiment, the protruding portions protruding within the range of the U-shaped cutout portions 34 of the stoppers 90 and 92 are locked to the slide member 200. Other than this embodiment and the sixth embodiment, there is no need for such a protruding portion.

  The operation of the above locking mechanism will be described. In the non-locked state and the non-operated state, both the gas supply tube 74 and the liquid supply tube 82 are pressed by the stoppers 90 and 92 as shown in FIG. These pipes are in a closed state where they are completely closed. On the other hand, the air / water supply lever 32 is pushed down from the reference position by a certain amount or more, and the gas supply tube 74 and the liquid supply tube 82 are both moved to the fully open state (non-pressed state). When the slide member 200 is slid rearward, both the left and right edge portions of the slide member 200 become positions where the stoppers 90 and 92 can be locked as shown in FIG. When the push operation of the air / water supply lever 32 is released, the urging force to return to the reference position is applied to the air / water supply lever 32 by the action of the torsion coil springs 94, 94. As shown in FIG. 24, the stoppers 90 and 92 are hooked on the slide member 200, and the stoppers 90 and 92 are locked to the slide member 200. Thereby, the gas supply tube 74 and the liquid supply tube 82 are not pressed by the stoppers 90 and 92, and both the gas supply tube 74 and the liquid supply tube 82 are locked in a non-pressed state in which they are completely opened.

  On the other hand, when the slide member 200 is slid from the solid line position to the broken line position by pushing the lower part of the slide member 200 forward as shown in FIG. 24 in the locked state, the stoppers 90 and 92 are detached from the slide member 200. The lock is released, and the air / water supply lever 32 rotates and stops at the reference position where both the gas supply tube 74 and the liquid supply tube 82 are closed as shown in FIG. Become.

  The locking mechanism of the fifth embodiment is also provided with a function for preventing the insertion assisting tool 10 from being used in the locked state, and when the insertion assisting tool 10 is attached to the rigid endoscope 12. It is possible to automatically switch from the locked state to the unlocked state.

  That is, in the locked state, the slide member 200 is disposed near the rear side of the U-shaped notch 34 as shown in FIGS. Therefore, when the insertion assisting tool 10 is to be attached to the rigid endoscope 12 in the locked state, the connector 28 of the rigid endoscope 12 contacts the slide member 200, and the connector 28 of the rigid endoscope 12 is notched in the U-shaped notch. Insertion into the part 34 is prevented. Thereby, the operator can know that the operation mechanism is in the locked state.

  Further, after the connector 28 of the rigid endoscope 12 abuts against the slide member 200, when the connector 28 is pushed in toward the distal end side of the U-shaped notch 34 as it is, the slide member 200 becomes like the broken line in FIG. 24. The slide is pushed to the front side, and the lock is released as shown in FIG. At this time, since the slide member 200 has moved to the front side, the insertion aid 10 can be attached to the rigid endoscope 12 by inserting the connector 28 to a predetermined position of the U-shaped cutout 34.

  As described above, according to the lock mechanism of the present embodiment, when the insertion assisting tool 10 is mounted on the rigid endoscope 12, the lock is automatically released, so that a special work for releasing the lock is performed. It becomes unnecessary. Other effects of the lock mechanism according to the present embodiment are the same as those of the lock mechanism according to the first embodiment, and a description thereof will be omitted.

  The slide member 200 is disposed at a position that prevents the rigid endoscope 12 from being mounted (for example, a position that overlaps at least one of the endoscope placement area and the rear-side vicinity area) when in the locked state. What is necessary is just to arrange | position in the position which does not block mounting | wearing of the rigid endoscope 12 in the non-locking state, for example, not the upper end part of the U-shaped notch part 34, but the base of the lumen | rumen 16 of the sheath insertion part 14 It can be arranged at a position that does not overlap the end side opening in the front-rear direction and above the base end opening.

  Next, a lock mechanism according to a sixth embodiment will be described. 25 to 27 are views showing a mode in which the lock mechanism of the sixth embodiment is provided in the handle portion 30, and FIG. 25 is an enlarged view of the handle portion 30 shown in the perspective view of FIG. FIG. 26 is a schematic cross-sectional view schematically showing components of the operation mechanism and the lock mechanism of the handle portion 30 from the rear side, and FIG. 27 is a cross-sectional view shown from the side.

  As shown in FIGS. 25 to 27, the locking mechanism of the present embodiment is provided on a dummy endoscope 230 that is formed of a synthetic resin, for example, by imitating the rigid endoscope 12 and the dummy endoscope. And an engaging member 232.

  The dummy endoscope 230 has an insertion portion 230A (see FIG. 27) having the same outer shape as the endoscope insertion portion 26 as in the rigid endoscope 12, and is inserted into the lumen 16 of the sheath insertion portion 14. It can be done. Further, a proximal end portion 230B corresponding to a distal end side portion (portion where the connector 28 protrudes) of the main body portion 24 of the rigid endoscope 12 is provided on the proximal end side of the insertion portion 230A.

  The engaging member 232 is formed in a plate shape, and is supported on the base end portion 230B of the dummy endoscope 230 via the connecting portion 230C. The engaging member 232 is arranged at the upper end of the U-shaped notch 34 of the insertion assisting tool 10 when the insertion assisting tool 10 is mounted on the dummy endoscope 230. In addition, in the main body 31 of the handle portion 30 in the same figure, as in the fifth embodiment, flange portions 206 and 208 are formed on the left and right upper end portions of the U-shaped cutout portion 34, and the engagement portion is engaged. The left and right edge portions of the member 232 are in contact with the flange portions 206 and 208. When the operation mechanism is locked by the lock mechanism of the present embodiment as will be described later, the lower surface of the engaging member 232 is formed in the grooves 76 and 84 as shown in FIGS. The stoppers 90 and 92 are disposed so as to be in contact with the protruding portions of the stoppers 90 and 92 protruding within the range of the U-shaped notch 34 through 76A and 84A.

  The operation of the above locking mechanism will be described. In the non-locked state and the non-operated state, both the gas supply tube 74 and the liquid supply tube 82 are pressed by the stoppers 90 and 92 as shown in FIG. These pipes are in a closed state where they are completely closed.

  On the other hand, the air / water supply lever 32 is pushed down from the reference position by a certain amount or more, and the gas supply tube 74 and the liquid supply tube 82 are both moved to the fully open state (non-pressed state). Assume that the insertion portion of the dummy endoscope 230 is inserted into the lumen 16 of the sheath insertion portion 14 and the insertion assisting tool 10 is attached to the dummy endoscope 230. Then, the engaging member 232 of the dummy endoscope 230 is disposed in the U-shaped notch 34, and the left and right edges of the engaging member 232 can lock the stoppers 90 and 92 as shown in FIG. Placed in position. Then, when the pressing operation of the air / water supply lever 32 is released, the urging force to return to the reference position is applied to the air / water supply lever 32 by the action of the torsion coil springs 94, 94. As shown in FIG. 27, the stoppers 90 and 92 are hooked on the engaging member 232, and the stoppers 90 and 92 are locked to the engaging member 232. Thereby, the gas supply tube 74 and the liquid supply tube 82 are not pressed by the stoppers 90 and 92, and both the gas supply tube 74 and the liquid supply tube 82 are locked in a non-pressed state in which they are completely opened.

  On the other hand, when the dummy endoscope 230 is removed from the insertion assisting tool 10 in the locked state, the lock is released and both the gas supply tube 74 and the liquid supply tube 82 are closed as shown in FIG. The air / water supply lever 32 is rotated and stopped at the position, and is brought into an unlocked state.

  According to the lock mechanism of the sixth embodiment, use of the insertion assisting tool 10 in the locked state is prevented. That is, in the locked state, since the insertion assisting tool 10 is mounted on the dummy endoscope 230, mounting of the insertion assisting tool 10 on the rigid endoscope 12 is prevented in the locked state. Thereby, the operator can know that the operation mechanism is in the locked state. Other effects of the lock mechanism according to the present embodiment are the same as those of the lock mechanism according to the first embodiment, and a description thereof will be omitted.

As described above, in the above embodiment, the lock mechanism applied to the insertion assisting tool provided with the operation mechanism that switches the open / close state of the two tubes of the gas supply tube 74 and the liquid supply tube 82 by pressing (crushing) has been described. However, the present invention can also be applied to an insertion aid provided with an operation mechanism for switching the open / closed state of one tube or three or more tubes. In addition, the use of the conduit and the tube in the insertion aid to which the present invention is applicable is not limited to the supply of a gas such as CO ₂ or a liquid such as cleaning water, but the present invention can be applied to any use. Can be applied. For example, a suction device may be connected to the gas supply tube 74 instead of the CO ₂ supply device 80 to suck dirt and droplets in the illumination window 40 and the observation window 42, and the present invention also applies to such an insertion aid. Can be applied.

  Although the endoscope insertion aid 10 according to the embodiment has been described in detail above, the present invention is not limited to the above examples, and various improvements and modifications can be made without departing from the gist of the present invention. Of course, you may also do.

DESCRIPTION OF SYMBOLS 10 ... Endoscope insertion aid, 12 ... Rigid endoscope, 14 ... Sheath insertion part, 24 ... Main body part, 26 ... Endoscope insertion part, 28 ... Connector, 30 ... Handle part, 31 ... Main body, 32 DESCRIPTION OF SYMBOLS ... Air supply / water supply lever 34 ... Notch part 36 ... Light guide cable 38 ... Light source device 40 ... Illumination window 42 ... Observation window 44 ... Eyepiece part 46 ... Eyepiece lens 50 ... Introducing tube 52 ... collet chuck, 54 ... collet part, 56 ... nut part, 58 ... split groove, 60 ... male screw, 62 ... female screw, 64 ... support part, 66 ... heat shrink tube, 68 ... nozzle, 70, 72 ... port, 74 ... Gas supply tube, 76 ... groove, 78 ... opening, 80 ... CO ₂ supply device, 82 ... liquid supply tube, 84 ... groove, 86 ... opening, 88 ... water supply device, 90, 92 ... stopper, 94, 96 ... Torsion coil spring, 98 ... shaft, 10 DESCRIPTION OF SYMBOLS 0, 102 ... Push-down member, 110 ... Lock pin, 112, 114 ... Through-hole, 120 ... Base part, 122 ... Lever part, 128B, 130B ... Engagement part, 140 ... Lever member, 146 ... Insertion prevention part, 152 DESCRIPTION OF SYMBOLS 154 ... Projection part, 170 ... Lever member, 176 ... Insertion node part, 182, 184 ... Extension part, 200 ... Slide member, 202, 204 ... Guide groove, 230 ... Dummy endoscope, 232 ... Engagement member

Claims (15)

A proximal operation portion and a tubular sheath insertion portion having a lumen connected to the proximal operation portion and inserted through the insertion portion of the endoscope, and the sheath insertion portion is connected to the distal end portion. In an insertion assisting tool for an endoscope provided with a fluid conduit communicating with a provided nozzle,
The hand operating unit is
A main body provided with a fixing portion disposed along a position through which a tube connected to the fluid pipe line passes;
A pressing member that is disposed opposite to the fixed portion with the tube interposed therebetween, and that is displaced between a pressing position that presses the tube and a non-pressing position that does not press the tube;
A driving member supported to be displaceable with respect to the main body, and is displaced between a pressing driving position that displaces the pressing member to a pressing position and a non-pressing driving position that displaces the pressing member to a non-pressing position. A driving member to
A locking member that is displaceable between a predetermined locking position and a non-locking position with respect to the main body, wherein the pressing member is engaged with the pressing member or the driving member at the locking position; A locking member that holds the pressing member at the non-pressing position, and does not hold the pressing member at the non-pressing position by not engaging the pressing member and the driving member at the non-locking position;
An insertion assisting tool for an endoscope, comprising:   The endoscope insertion aid according to claim 1, wherein the lock member is disposed at a position where the attachment of the endoscope is prevented when the lock member is in the lock position.   The insertion assisting tool for an endoscope according to claim 2, wherein the locking member is in a position where the attachment of the endoscope is not blocked when the locking member is in the unlocked position.   A biasing member that biases the pressing member in a direction that displaces the pressing member from the non-pressing position to the pressing position, and the driving member is configured to resist the biasing force of the biasing member by applying an operating force. The insertion assisting tool for an endoscope according to any one of claims 1 to 3, wherein the pressing member is displaced from the pressing position to the non-pressing position.   The endoscope insertion aid according to claim 4, wherein the pressing member is integrally formed with the biasing member.   The lock member is a lock member that engages with the drive member by being removably inserted into an insertion hole formed in the drive member, and the position when the lock member is inserted into the insertion hole is the lock position. And the position when pulled out from the insertion hole is the non-locking position, and the pressing member is held in the non-pressing driving position by contacting the main body at the locking position. The insertion assisting tool for an endoscope according to any one of claims 1 to 5, wherein the insertion assisting tool is an locking member that holds the screw in the non-pressing position.   The lock member is disposed at a position overlapping with a region through which the light guide connector of the endoscope passes when the insertion portion of the endoscope is inserted into the sheath insertion portion at the lock position. The insertion assisting tool for an endoscope according to claim 6, wherein:   The lock member is a lock member supported so as to be swingable with respect to the main body, and holds the pressing member in the non-pressing position by engaging with the pressing member in the locking position. The locking member does not hold the pressing member at the non-pressing position by not engaging with the pressing member at the non-locking position. The insertion aid for endoscopes described in 1.   The lock member includes an engagement portion that engages with the pressing member when in the lock position, a support portion that supports the engagement portion in a swingable manner, and the endoscope that is mounted when the lock member is in the lock position. The endoscope insertion assisting tool according to claim 8, further comprising: a blocking portion disposed at a position where blocking is performed.   The lock member is a lock member supported so as to be swingable with respect to the main body, and holds the drive member in the non-pressing drive position by engaging with the drive member at the lock position. The pressing member is held in the non-pressing position, and is not locked with the driving member when in the non-locking position, so that the pressing member is not held in the non-pressing position. The insertion assisting tool for an endoscope according to any one of claims 1 to 5.   The lock member includes an engagement portion that engages with the pressing member when in the lock position, a support portion that supports the engagement portion in a swingable manner, and the endoscope that is mounted when the lock member is in the lock position. The insertion assisting tool for an endoscope according to claim 9, further comprising a blocking portion disposed at a position where blocking is performed.   The lock member is a lock member that is slidably supported with respect to the main body, and is engaged with the pressing member at the locking position, thereby holding the pressing member in the non-pressing position. And it is a lock member which does not hold | maintain the said press member in the said non-pressing position by not engaging with the said press member at the time of the said non-lock position, The Claim 1 characterized by the above-mentioned. The endoscope insertion aid as described.   The main body includes a housing portion in which a connector for a light guide of the endoscope is housed in a direction orthogonal to a direction in which the pressing member is displaced, and the lock member is disposed in the housing portion. The insertion assisting tool for an endoscope according to claim 12, characterized in that the endoscope is inserted.   The lock member is a lock member provided with a dummy part imitating the outer shape of the endoscope, and a position when the dummy part is attached to the endoscope insertion aid is defined as the lock position. The position when the dummy part is removed from the endoscope insertion aid is set as the non-lock position, and the non-pressing member is engaged with the pressing member at the lock position. The lock member that does not hold the pressing member in the non-pressing position by being held in a position and not engaging with the pressing member in the non-locking position. The endoscope insertion aid according to any one of the preceding claims. The main body includes an accommodating portion in which the light guide connector of the endoscope is accommodated in a direction orthogonal to a direction in which the pressing member is displaced,
The insertion assisting tool for an endoscope according to claim 14, wherein an engaging portion of the lock member that engages with the pressing member at the lock position is disposed in the housing portion.

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