JP2010057728A - Piping connection adapter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connector to an endoscope having observation window cleaning means and fluid injection means, so as to keep a cleaning liquid feeding mechanism removably connected to a connector in its universal cord and make it possible to feed injected liquid, which the cleaning liquid feeding mechanism is not provided with. <P>SOLUTION: A liquid-path 42, an air-path 43, and an injection-path 44 each open in the end of the connector-side removable portion 40a of a piping connection adapter 40, and the liquid-path 42 and the air-path 43 each open in a supply-side removable portion 40b, wherein the injection-path 44 extends as the introduction-path 49a provided in injection means connection portion 49 connected with the side surface of an adapter body 41. In the connector-side piping connection portion 35 of an endoscope SB of B type, a gas-supplying passage 13, a liquid supplying passage 14 and an injection passage 25 are each connected to the connector-side removable portion 40a, and an air-piping portion 21b and a liquid-supplying-piping portion 21a of the cleaning liquid feeding mechanism 19 are each connected to the supply-side removable portion 40b. In addition, a liquid supplying pipe 53 is connected to the injection means connection portion 49. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

    The present invention provides an endoscope provided with an observation window cleaning means for cleaning an observation window provided at a distal end hard portion of an insertion portion, and a fluid ejecting means for ejecting another cleaning liquid, a chemical solution, or the like from the distal end hard portion. And a pipe connection adapter that is interposed between a supply pipe that is not provided with a pipe serving as a path of the fluid ejecting means.

  The endoscope is provided with an observation window cleaning means for supplying air and supplying liquid for removing dirt when the observation window provided at the distal end hard part of the insertion part is soiled as a fluid supply device. Yes. This observation window cleaning means is configured by connecting a cleaning fluid supply path to a cleaning nozzle provided at a position close to the observation window. The cleaning fluid supply path is inserted through a main body operation unit connected to the insertion unit and a universal cord extending from the main body operation unit, and is drawn out as a connector side connection unit from a connector provided at an end of the universal cord. . The cleaning nozzle and the pressurized air are applied to the observation window from the cleaning nozzle. For this purpose, a liquid supply tank and an air pump are provided as fluid sources. A control valve is provided in the main body operation unit, and the control valve is operated with a finger or the like so that the cleaning liquid is sprayed from the cleaning nozzle toward the observation window, and pressurized air is blown onto the surface of the observation window.

  Some endoscope fluid supply apparatuses are provided with fluid ejection means in addition to the observation window cleaning means. The observation window cleaning means is for supplying cleaning liquid or pressurized air toward the surface of the observation window. Accordingly, the cleaning fluid supply path provided in the axial direction of the insertion portion is the site of the cleaning nozzle. The flow is changed in a direction substantially perpendicular to the axis. On the other hand, the fluid ejecting means performs jet ejection mainly for cleaning the inner wall of the body cavity. That is, when inspecting the state of the inner wall of the body cavity by the endoscope observation means at the distal end hard part in the insertion portion of the endoscope, when blood or other body fluid, further solid matter or the like adheres to the inner wall of the body cavity, Since it obstructs the observation and treatment of the inner wall of the body cavity, it is used for the purpose of washing out the attached fouling substances by spraying the cleaning liquid at a high pressure. The fluid ejecting means is also used for ejecting a coloring agent or a chemical solution. Therefore, the fluid ejecting means is usually configured to eject the fluid in the direction of the substantially extended line of the insertion portion.

The fluid ejecting means is opened as an ejection port on the distal end surface of the distal end hard portion, and a fluid supply pipe connected to a fluid supply source is detachably connected to the ejection passage. The injection passage extends at least from the insertion portion into the main body operation portion. In some cases, a connection part between the ejection passage and the fluid supply pipe is provided in the main body operation part. However, if this is done, an external pipe is drawn out from the main body operation part, and this fluid supply pipe interferes with the endoscope operation. Therefore, the injection passage is further guided into the universal cord, a connection port portion is provided in a connector provided at the tip of the universal cord and detachably connected to an external device such as a light source device. A configuration in which the fluid supply pipe is detachably connected is used. A configuration in which the fluid supply pipe is connected to the connector in this manner is disclosed in, for example, Patent Document 1.
JP 2003-33320 A

  The air pump that constitutes the observation window cleaning means is generally built in the light source device as an external device, and the liquid feed tank needs to be replenished with cleaning liquid. Usually, it is mounted so as to be fixedly held in the casing of the light source device. The cleaning liquid is generally pumped by pressurizing the liquid surface rather than pumping the cleaning liquid directly from the pumping tank and supplying it. For this purpose, pressurized air is supplied from the air pump. . Therefore, a cleaning liquid pipe for supplying a cleaning liquid and a pressure pipe are connected to the liquid feeding tank in the observation window cleaning means. These cleaning liquid pipes and pressure pipes are constituted by double flexible pipes having the cleaning liquid pipe as an inner pipe and the pressure pipe as an outer pipe. In addition, a fluid supply pipe is detachably connected to the ejection passage that constitutes the fluid ejection means and extends into the universal cord from the distal end of the insertion portion. Here, like the double flexible pipe, the fluid supply pipe is constituted by a flexible pipe, usually a tube material.

  As described above, the connector of the universal cord is provided with the connection portion of the double flexible tube constituting the cleaning liquid supply mechanism of the observation window cleaning means and the connection portion of the fluid supply pipe constituting the fluid ejecting means. In the prior art including Patent Document 1 described above, these two connection portions are provided independently, and these double flexible pipes and fluid supply pipes are individually connected to connectors. The connector is provided at the tip of the universal cord and needs to be as small as possible. Therefore, when two fluid connection portions are provided in the connector, there is a problem that the configuration of the connector is complicated.

  The present invention has been made in view of the above points. An object of the present invention is to provide an endoscope provided with an observation window cleaning means and a fluid ejection means, a connector in the universal cord, and a cleaning liquid supply mechanism. Another object of the present invention is to provide a connector that can be detachably connected to each other and can supply a jet fluid that is not provided in a cleaning liquid supply mechanism.

  In order to achieve the above-described object, the present invention provides a cleaning liquid supply mechanism provided with a supply side pipe composed of a liquid supply pipe part and an air pipe part connected to a liquid supply tank, and a connector of a universal cord of an endoscope. A pipe connection adapter for detachably connecting between a liquid supply flow path and an air supply flow path, and a connector side connection portion in which a fluid ejection flow path is opened, one end side of which is connected to the supply side pipe An adapter body having a connector-side detachable portion, the other end of which is detachably connected to the connector, and the other end is detachably connected to the connector. A liquid passage connecting between the liquid flow path, an air passage connecting between the air pipe section and the air supply flow path, one end connected to the fluid ejection flow path, and the other end of the adapter main body Leads to the injection passage connection on the side It is an its features that it has a configuration in which the injection passage.

  The cleaning liquid supply mechanism as the supply side in the observation window cleaning means is composed of a cleaning liquid tank and a supply side pipe connected to the cleaning liquid tank. The supply side pipe is composed of a double pipe consisting of a liquid supply pipe section and an air pipe section. Composed. The supply side pipe is detachably connected to a connector in the universal cord of the endoscope. By the way, as an endoscope, there are a type that includes an observation window cleaning unit but does not include a fluid ejection unit, and a type that includes an observation window cleaning unit and a fluid ejection unit. As already described, in an endoscope provided with fluid ejecting means, it is not desirable to provide a connection portion between the ejection flow path and the fluid supply pipe in the main body operation section, so that the ejection flow path extends to the connector. The configuration.

  From the above, the connector-side connecting portion provided in the connector includes an endoscope having a liquid supply flow path and an air supply flow path, and an inner part provided with a fluid ejection flow path in addition to the liquid supply flow path and the air supply flow path. There is an endoscope. When the former is an A type endoscope and the latter is a B type endoscope, these two types of endoscopes can be detachably connected to a single cleaning liquid supply mechanism. In the case of the A type endoscope, the cleaning liquid supply mechanism is directly connected. On the other hand, when a B-type endoscope is used, the cleaning liquid supply mechanism cannot be directly connected. For this purpose, the pipe connection adapter of the present invention is used.

  The pipe connection adapter is provided with a liquid passage and an air passage, and these liquid passage and air passage are provided so as to penetrate from the connector attaching / detaching portion to the supply side attaching / detaching portion. Further, the pipe connection adapter is provided with an injection passage, and this injection passage opens in the connector attaching / detaching portion. On the other hand, the other end of the injection passage communicates with an injection passage connecting portion provided on the side surface of the adapter body, and is not opened in the connector attaching / detaching portion. As a result, when an A type endoscope is used, and when a B type endoscope is used, it is connected to a supply side pipe constituting the cleaning liquid supply mechanism via a pipe connection adapter. .

  As described above, when a B-type endoscope is used, a pipe connection connector is interposed between the connector side connection portion and the supply side pipe of the cleaning liquid supply mechanism. A communication relationship must be maintained between each flow passage. It is only necessary to accurately align between the connector side connection part and the pipe connection adapter, and between the pipe connection adapter and the supply pipe of the cleaning liquid supply mechanism, but it may be difficult to accurately align between them. .

  By providing the liquid supply flow path, the liquid passage, and the liquid supply piping section so as to be located at the axial center position of the connector side connection section, the connector main body of the pipe connection connector, and the supply side piping, the flow path of the cleaning liquid is relatively displaced. It does not occur. Accordingly, since the air flow passage and the jet fluid flow passage are provided at positions eccentric from the axial center, it is necessary to ensure that these flow passages are in communication with each other.

  A connection pipe is projected from the fluid ejection flow path in the connector side connection portion, and the connection pipe is connected to be inserted into the ejection passage in the connector side attachment / detachment portion in the adapter body. Thus, there is no deviation in the rotational direction between the connector side connecting portion and the connector side attaching / detaching portion of the pipe connecting connector. That is, the pipe connection connector and the connector side connection portion are aligned via the connection pipe.

  Therefore, the air supply flow path and the air passage are surely communicated with each other. On the other hand, an alignment member such as the connection pipe described above is not interposed between the supply pipe of the cleaning liquid supply mechanism and the supply side detachable portion of the pipe connection connector. However, the air passage is configured to open in an annular shape around the liquid passage. Thereby, even if the position between the pipe connection adapter and the supply pipe of the cleaning liquid supply mechanism is displaced in the rotational direction, the air flow passage can be reliably maintained in a communication state.

  When a fluid is allowed to flow through the flow path of the ejection fluid while the fluid ejection means is connected to the ejection path connection portion while performing inspection or observation in the body cavity of the subject using a B-type endoscope, The liquid stays in the flow path. Since the distal end of the fluid ejection channel is open to the distal end of the insertion portion, if the fluid ejection means is removed from the ejection passage connection portion, the liquid inside the flow passage may flow backward. Accordingly, a backflow prevention valve for preventing the backflow of fluid from the fluid ejection flow path side is provided in a portion from the connector side connection portion to the ejection passage connection portion in the ejection passage, and in the endoscope cleaning apparatus, When immersing the entire mirror, remove the pipe connection adapter from the connector side connection. In addition, although it can also be considered that the backflow prevention valve is configured to be provided at the connector side connection portion, it becomes difficult to clean after use. In addition, after cleaning the observation window during use of the endoscope, the cleaning liquid remains in the liquid supply flow path, but an air / liquid supply valve is provided in the middle of the flow path of the cleaning liquid. The flow path of the cleaning liquid is blocked by the air / liquid supply valve, so that no back flow occurs.

  The connector in the universal cord of the endoscope provided with the observation window cleaning means and the fluid ejecting means is connected to a cleaning liquid supply mechanism connected to the endoscope having the observation window cleaning means and not including the fluid ejecting means. By extending the connecting portion of the fluid ejecting means to the connector, the member connected to the main body operation portion can be simplified, and the cleaning liquid supply mechanism is shared by both types of endoscopes. be able to.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, FIG. 1 shows the overall configuration of the endoscope. In the figure, 1 is a main body operation unit, 2 is an insertion unit, and 3 is a universal cord. The main body operation part 1 is a mechanism part for an operator to hold and operate, and an insertion part 2 connected to the main body operation part 1 is inserted into the body cavity of the subject. . Furthermore, the universal cord 3 is for connecting to an external device such as a light source device or a video signal processing device.

  The insertion portion 2 is mostly flexible portion 2a from the side connected to the main body operation portion 1, and the bending portion 2b is provided at the distal end of the flexible portion 2a, and the distal end hard portion 2c is provided at the distal end of the bending portion 2b. It is connected and provided. The main body operation unit 1 as an operation mechanism unit is provided with an operation knob 4 for bending the bending portion 2b of the insertion portion 2. By operating the operation knob 4, the distal end hard portion 2c can be remotely operated. It becomes possible to point in a desired direction. In addition, the main body operation unit 1 is provided with an air supply / liquid supply valve 5 and a suction valve 6, and a treatment instrument introduction unit 7 is also provided.

  As shown in FIGS. 2 and 3, illumination windows 8 and 8 and an observation window 9 are provided on the distal end surface of the distal end hard portion 2 c of the insertion portion 2, and the interior of the body cavity is illuminated with illumination light from the illumination window 8. In an illuminated state, an image inside the body cavity can be obtained by the observation window 9. Furthermore, the distal end rigid portion 2c is provided with a nozzle 10 for cleaning the observation window, and a treatment instrument outlet 11 for inserting forceps and other treatment instruments is opened. Here, as will be described later, the injection port 24 of the fluid injection flow path 25 is formed in the insertion portion of FIG. 3, and such an injection port is not provided in the insertion portion of FIG. 2. Therefore, the configuration of the endoscope fluid supply apparatus having the insertion portion of FIG. 2 is as shown in FIG. 4, and the endoscope fluid supply device having the insertion portion of FIG. 3 is as shown in FIG. It is configured. Therefore, in the following description, the endoscope of FIGS. 2 and 4 is referred to as an A-type endoscope SA, and the endoscope of FIGS. 3 and 5 is referred to as a B-type endoscope SB. . Here, the A type endoscope SA and the B type endoscope SB are the same in that they have observation window cleaning means for cleaning the observation window 9 as the fluid supply device of the endoscope. The endoscope SB differs from the A-type endoscope SA in that it has fluid ejecting means for ejecting liquid or the like toward the inner wall of the body cavity.

  The fluid flow path constituting the observation window cleaning means common to the A type endoscope SA and the B type endoscope SB is connected to the nozzle 10 provided at the distal end hard portion 2c of the insertion portion 2. The air supply / liquid supply path 12 is provided, and the air supply / liquid supply path 12 passes through the curved part 2b in the middle, specifically, at the position in the soft part 2a, and the internal supply air supply flow path 13a and the internal supply liquid in the insertion part The air supply flow path 13a is branched into the flow path 14a, and the air supply flow path 13a in the insertion section and the liquid supply flow path 14a in the insertion section are extended into the main body operation section 1 and are provided in the main body operation section 1. 5 is connected. A cord-side air supply passage 13b and a cord-side liquid supply passage 14b are also connected to the air-supply / liquid supply valve 5. By operating the air-supply / liquid supply valve 5, the cord-side air supply passage 13b is inserted. The cord-side liquid supply flow path 14b and the insertion-part liquid supply flow path 14a are communicated and blocked with the internal air supply flow path 13a. The cord-side air supply passage 13b and the insertion-portion internal-feeding flow passage 13a constitute an air-feeding passage 13, and the cord-side liquid-feeding passage 14b and the insertion-portion internal-feeding flow passage 14a constitute a liquid-feeding passage 14. Further, the air / liquid feeding path 12 is a common flow path through which the pressurized air and the cleaning liquid flow, and these constitute a flow path for the cleaning fluid, and by operating the air / liquid feeding valve 5, Pressurized air or cleaning liquid is selectively supplied.

  The air supply flow path 13 and the liquid supply flow path 14 are extended to the position of the connector 15 provided at the tip of the universal cord 3. The connector 15 is a light source connector that is detachably connected to a light source device 16 as an external device. The light source device 16 has a built-in light source lamp, and illumination light from the light source lamp is transmitted from the connector 15 to the universal cord 3 and The light is transmitted through a light guide (not shown) extending from the main body operation unit 1 to the distal end hard portion 2c of the insertion unit 2, and the illumination light is emitted from the illumination window 8 to illuminate the inside of the body cavity. An electrical connector 17 branches from the connector 15, and the electrical connector 17 is detachably connected to a processor (not shown).

  The light source device 16 incorporates an air pump 18 for supplying pressurized air to the air supply passage 13 in the observation window cleaning means. On the other hand, the cleaning liquid is supplied to the liquid supply passage 14. For this purpose, the connector 15 is provided with a connector side connection portion 15a. The cleaning liquid supply mechanism 19 is detachably connected to the connector side connection portion 15a. The cleaning liquid supply mechanism 19 includes a liquid supply tank 20 and a supply side pipe 21. The liquid feeding tank 20 is installed outside the light source device 16 and is normally fixedly held by the light source device 16.

  In order to supply the cleaning liquid from the liquid feeding tank 20, pressurized air from the air pump 18 is used. For this purpose, the air supply flow path 13 is provided with a branched air supply flow path 13c, which faces the connector side connection portion 15a. The supply side pipe 21 is composed of a double flexible pipe, the inner pipe is a liquid feeding pipe section 21a, and the outer pipe is an air pipe section 21b. The liquid level of the liquid feeding tank 20 is pressurized by the pressurized air supplied through the air piping part 21b, and the cleaning liquid is pressure-fed into the liquid feeding piping part 21a by the pressurization of the liquid level. And the front-end | tip part of the supply side piping 21 becomes the connection part 22. FIG.

  The cleaning fluid supply path includes both the A type endoscope SA and the B type endoscope SB. In the B type endoscope SB shown in FIG. Means. As shown in FIG. 3, the fluid ejecting means has an ejection port 24 that opens at the distal end surface of the distal end hard portion 2 c of the insertion portion 2, and an ejection channel 25 is connected to the ejection port 24. . The ejection flow path 25 extends from the insertion portion 2 to the universal cord 3 through the main body operation portion 1 and opens at a connector side connection portion 15 a provided in the connector 15. Here, the air supply flow path 13 and the liquid supply flow path 14 are connected to the air supply / liquid supply valve 5 in the middle, whereas the injection flow path 25 has a uniform flow path cross-sectional area over the entire length. It is.

  An air supply flow path 13 and a liquid supply flow path 14 face the connector side connection portion 15a of the A type endoscope SA, and are detachably connected to the cleaning liquid supply mechanism 19. FIG. 6 shows a connection structure between the connector side connection portion 15 a and the cleaning liquid supply mechanism 19.

  The connection part 22 of the cleaning liquid supply mechanism 19 is provided with an opening / closing valve 26 at the tip of the liquid supply pipe part 21a. As shown in FIG. 7, the on-off valve 26 has a casing 28 provided with a valve seat portion 27, and the liquid supply piping portion 21 a is connected to the casing 28. The valve member 29 is slidable along the casing 28, and a plurality of communication holes 30 are provided in the peripheral body portion. The valve member 29 is provided with a flange portion 29 a, and a spring 31 acts on the valve member 29, and the flange portion 29 a is seated on the valve seat portion 27 by the urging force of the spring 31. . When the cleaning liquid supply mechanism 19 is connected to the connector side connection portion 15 a, the valve member 29 is pushed in a direction against the spring 31, and the liquid supply flow path 14 is communicated through the communication hole 30 provided in the valve member 29. And the liquid feeding piping part 21a come to communicate with each other.

  An annular groove 32 is formed around the mounting portion of the valve member 29 of the casing 28, and a plurality of communication passages 33 are provided in the casing 28. One end of the communication path 33 communicates with the air piping portion 21 b, and the other end opens into the concave groove 32. When the concave groove 32 is fitted into the connector side connection portion 15a, the upper end portion is closed by the connector side connection portion 15a to form an annular chamber. It will be connected with the air piping part 21b via.

  Here, the liquid feeding flow path 14 is provided at the axial center position of the connector side connecting portion 15 a, and the liquid feeding piping portion 21 a is provided at the axial center position of the connecting portion 22 in the supply side piping 21. On the other hand, the air supply channel 13 is connected to the concave groove 32. Therefore, when the cleaning liquid supply mechanism 19 is connected to the connector side connection portion 15a, the liquid supply flow path 14 and the liquid supply pipe section 21a communicate with each other without the need for special positioning in the rotation direction, and the air supply flow path 13 is air. It will communicate with the piping part 21b. In FIG. 6, reference numeral 34 denotes a connection ring made of a bayonet mechanism or the like. The connection ring 34 can hold the cleaning liquid supply mechanism 19 in a state of being connected to the connector side connection portion 15a.

  By the way, when the B type endoscope SB is used, the cleaning liquid supply mechanism 19 is not directly connected to the connector side connection portion 15a, but as shown in FIGS. Intervene. Here, in the case of the B type endoscope SB, the connector side connection portion 35 includes the air supply flow path 13 and the liquid supply flow path 14 in the same manner as the A type endoscope SA described above. Although provided, an ejection flow path 25 constituting a fluid ejection means is further provided. In the injection flow path 25, a connection pipe 36 is provided so as to protrude.

  As shown in FIG. 10, the connector side connecting portion 35 is detachably connected to a connector side attaching / detaching portion 40 a that is one end side of the pipe connecting adapter 40. Further, the supply side detachable portion 40 b is connected to the connection portion 22 of the supply side piping 21 of the cleaning liquid supply mechanism 19 at the other end of the pipe connection adapter 40.

  The pipe connection adapter 40 has an adapter main body 41. The adapter main body 41 has an upper structure portion 45a provided with a liquid passage 42, an air passage 43, and an injection passage 44 in the connector side attaching / detaching portion 40a. The lower structure part 45b provided in connection with the structure part 45a is comprised. The liquid passage 42 and the air passage 43 extend through the upper structure 45a to the lower structure 45b and open at the end of the supply-side detachable portion 40b. An opening / closing valve 46 is provided at a portion of the connector side attaching / detaching portion 40 a in the liquid passage 42 provided in the adapter main body 41. Since the specific configuration of the on-off valve 46 is the same as that of the on-off valve 26 shown in FIG. 7, the illustration and detailed description thereof are omitted. The air passage 43 is connected to a plurality of communication passages 47 in the casing 45, and the communication passage 47 faces an annular concave groove 48 formed at the tip of the upper structure portion 45 a of the adapter body 41. Yes. When connecting the connector side attaching / detaching portion 40 a of the pipe connection adapter 40 to the connector side connecting portion 35, the connecting pipe 36 is inserted into the injection passage 44.

  Further, one end of the injection passage 44 opens into the concave groove 48, and the other end is provided in the injection means connecting member 49 screwed into the side surface portion of the adapter main body 41 as shown in FIG. It communicates with the path 49a. A fluid ejecting means is connected to the ejecting means connecting member 49. This fluid ejecting means is for ejecting a cleaning liquid, a chemical solution, a coloring agent, or the like toward the inner wall of the body cavity. Moreover, although it consists of an elastic member in the middle of the introduction path 49a, a fluid can flow toward the injection channel 44 (state shown by the phantom line in FIG. 11), but a backflow is prevented (in the figure, it is shown as a continuous line). State shown) A backflow prevention valve 50 is provided.

  The fluid ejecting means connected to the ejecting means connecting member 49 is for ejecting a cleaning liquid, a chemical solution, a coloring agent, or the like toward the inner wall of the body cavity, and stores a predetermined fluid as is apparent from FIG. A liquid feed tank 51 is provided. The liquid supply tank 51 is equipped with a fluid pressure pump 52, and a fluid supply pipe 53 made of a flexible tube is connected to the discharge side of the pump 52. Further, in order to control the operation of the pump 52, a foot switch 54 is provided. When the foot switch 54 is depressed, the pump 52 is operated and the fluid in the liquid supply tank 51 is pumped to the fluid supply pipe 53, When the foot switch 54 is released, the operation of the pump 52 is stopped.

  The part of the supply side detachable part 40b in the lower structure part 45b of the adapter main body 41 of the pipe connection adapter 40 is detachably connected to the connection part 22 of the supply side pipe 21. For this purpose, an A type endoscope is used. It has the same configuration as the connector side connection portion 15a in SA.

  When the A-type endoscope SA is used, the connector 22 that constitutes the supply-side pipe 21 of the cleaning liquid supply mechanism 19 is directly connected to the connector-side connector 15a. Thereby, the air supply flow path 13 and the air piping part 21b are connected, and the liquid supply flow path 14 is connected to the liquid supply piping part 21a. Therefore, when the observation window 9 is soiled, the air / liquid supply valve 5 is switched to the water supply state. As a result, the pressurized air is guided to the air piping portion 21b, and the liquid level of the liquid feeding tank 20 is pressurized, so that the liquid feeding flow from the liquid feeding tank 20 through the liquid feeding piping portion 21a. The cleaning liquid is supplied to the passage 14 and the cleaning liquid is ejected from the nozzle 10 so that the contaminated material can be washed away. Next, when the air / liquid supply valve 5 is switched to the air supply state, the supply of the cleaning liquid to the nozzle 10 is cut off, and the pressurized air is ejected from the nozzle 10, so that the droplets adhering to the observation window 9 are removed. Can be removed.

  On the other hand, when the B type endoscope SB is used, the endoscope SB is provided with fluid ejecting means, and has a connector side connecting portion 35 provided with an ejection flow path 25 for this purpose. It is. The cleaning liquid supply mechanism 19 is not directly connected to the endoscope SB, but the cleaning liquid supply mechanism 19 is connected via the pipe connection adapter 40. The connector side attaching / detaching portion 40 a of the pipe connection adapter 40 is provided with not only the liquid passage 42 and the air passage 43 but also the injection passage 44. Therefore, not only the air supply flow path 13 and the liquid supply flow path 14 provided in the connector side connection portion 35 are connected to the liquid passage 42 and the air passage 43, but also the connection pipe 36 attached to the injection flow path 25 is injected. It is inserted into the passage 44.

  Here, the liquid supply flow path 14 is provided in the axial center position of the connector side connection part 35, and the air supply flow path 13 and the injection flow path 25 are provided in the position eccentric from the axial center. Therefore, by inserting the connection pipe 36 provided in the injection flow path 25 into the injection passage 44, the pipe connection adapter 40 is aligned with the connector side connection portion 35 and connected in a non-rotatable manner. Become. The adapter main body 41 is provided with a connection ring 55 so as to surround it. The connection ring 55 is fitted to the connector side connection portion 35 and rotated so that the bayonet mechanism, screw insertion, etc. The connection state is maintained by means.

  The supply side attaching / detaching part 40 b of the pipe connection adapter 40 is connected to the connection part 22 in the supply side pipe 21 of the cleaning liquid supply mechanism 19. Here, the connecting portion 22 has a liquid feeding pipe portion 21a opened at the axial center position, and an annular concave groove 32 is provided around the liquid feeding pipe portion 21a, and communicates with the air piping portion 21b. Since the passage 33 is opened in the concave groove 32, even if the cleaning liquid supply mechanism 19 is connected, even if they are displaced from each other in the rotational direction, there is no particular problem. And the connection ring 34 provided in the connection part 22 is fixed to the connection state by fitting the adapter main body 41 of the pipe connection adapter 40. In this state, the fluid supply pipe 53 from the liquid feeding tank 51 is connected to the ejection means connecting member 49.

  By assembling as described above, when the observation window 9 is soiled, the observation window 9 can be cleaned by supplying cleaning liquid and pressurized air to the nozzle 10 as in the case of the endoscope SA. Further, since the injection port 24 is opened at the tip of the insertion portion 2, the liquid can be jetted from the injection port 24. That is, by operating the foot switch 54, the pump 52 is driven, and the introduction passage 49 a, the injection passage 44 and the injection passage 25 provided in the injection means connecting member 49 from the fluid supply pipe 53 connected to the liquid supply tank 51. The liquid is supplied to the ejection port 24 through the jet port 24 and can be jet-jetted toward the inner wall of the body cavity from the ejection port 24 to wash away the contaminants adhering to the inner wall of the body cavity or Or spray the agent.

  After using the endoscope SB, the whole is cleaned and disinfected. Therefore, the connection between the connection portion 22 by the connection ring 34 and the supply side attachment / detachment portion 40b in the pipe connection adapter 40 is released. As a result, the connector 15 is separated from the cleaning liquid supply mechanism 19. Further, the connector 15 is detached from the light source device 16, and the endoscope SB is carried into a place where the cleaning equipment is provided. At this time, the pipe connection adapter 40 is not separated from the connector side connection portion 35. The tip of the ejection flow path 25 is opened as the ejection opening 24. Therefore, when the other end of the ejection flow path 25 is opened, the liquid staying inside flows out and soils the surroundings. Since the backflow prevention valve 50 is provided in the introduction path 49a of the injection means connecting member 49 and closes this portion, the fluid staying inside does not flow out. Although the cleaning liquid may stay in the liquid supply flow path 14, the liquid supply flow path 14 in the air supply liquid supply valve 5 includes an in-insertion-part liquid supply path 14 a, a cord side liquid supply flow path 14 b, and the like. In addition, since both the liquid supply passages 14a and 14b are closed at the position of the air / liquid supply valve 5, the cleaning liquid does not flow out.

It is an external view of a general endoscope. It is a front view which shows the front-end | tip hard part of the insertion part in the A type endoscope which does not provide a fluid injection means. It is a front view which shows the front-end | tip hard part of the insertion part in B type endoscope provided with the fluid injection means. It is composition explanatory drawing of the fluid supply / discharge mechanism of the endoscope in an A type endoscope. It is composition explanatory drawing of the fluid supply / discharge mechanism of the endoscope in a B type endoscope. It is sectional drawing which shows the connection part of an A type endoscope and a washing | cleaning-liquid supply mechanism. It is a principal part expanded sectional view which shows the connection state of FIG. It is sectional drawing which shows a B type endoscope, a washing | cleaning-liquid supply mechanism, and the piping connection adapter interposed therebetween. It is an external appearance perspective view of a pipe connection adapter. It is an expanded sectional view showing the state where a B type endoscope and a pipe connection adapter were connected. It is an expanded sectional view in the XX position of FIG. It is an external view which shows the connection part of the connector, observation window washing | cleaning means, and fluid injection means in a B type endoscope.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body operation part 2 Insertion part 2c Tip hard part 3 Universal cord 13 Air supply flow path 14 Liquid supply flow path 15 Connector 15a, 35 Connector side connection part 18 Air pump 19 Cleaning liquid supply mechanism 20 Water supply tank 21 Supply side piping 21a Liquid supply piping part 21b Air piping part 22 Connection part 24 Injection port 25 Injection flow path 26, 46 On-off valve 36 Connection pipe 40 Pipe connection adapter 40a Connector side attachment / detachment part 40b Supply side attachment / detachment part 41 Adapter main body 42 Liquid passage 43 Air passage 44 Injection passage 48 Concave Groove 49 Injecting means connecting member 49a Introduction path 50 Backflow prevention valve 51 Liquid feed tank 53 Fluid supply piping SA A type endoscope SB B type endoscope

Claims (3)

A cleaning liquid supply mechanism provided with a supply side pipe composed of a liquid supply pipe section and an air pipe section connected to the liquid supply tank, a universal cord connector of the endoscope, a liquid supply flow path and an air supply flow path; A pipe connection adapter for detachably connecting between the connector side connection part where the fluid ejection flow path opens,
A supply side detachable part having one end side detachably connected to the supply side pipe, and an adapter main body having a connector side detachable part detachably connected to the connector,
The adapter body has a liquid passage connecting the liquid supply pipe section and the liquid supply flow path, an air passage connecting the air pipe section and the air supply flow path, and one end of the fluid. A pipe connection adapter comprising: an injection passage connected to an injection passage and having an other end connected to an injection passage connection member provided on a side surface of the adapter body. In the adapter body, the liquid passage is provided at the axial center position, the air passage and the ejection passage are provided at positions eccentric from the axial center, and a connection pipe is projected from the fluid ejection passage. The connecting pipe is inserted into the connector side attaching / detaching portion of the injection passage, and the supply side attaching / detaching portion of the air passage is opened in a groove formed in an annular shape around the liquid passage. The pipe connection adapter according to claim 1, wherein The backflow prevention valve which prevents the backflow of the fluid from the said fluid injection flow path side was provided in the site | part from the said connector side connection part in the said injection path to the said injection path connection part, The structure characterized by the above-mentioned. The pipe connection adapter according to claim 2.

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