JPS6238979B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a suction control device for an endoscope that performs suction, air and water supply, and insertion of treatment tools such as forceps through a channel.

In general, endoscope suction control devices are used to suction and remove mucus and dirt from body cavities, but they can also be used to insert treatment tools into body cavities or inject medicinal solutions. It is configured so that it can be done.

Conventionally, such a suction control device has been constructed as shown in FIG. That is, numeral 1 in the figure is an outer cylinder to which the suction tube 2 is connected to the peripheral wall and whose lower end is connected to the channel of the endoscope. Inside this outer cylinder 1, a guide cylinder 5 is provided, which is formed by screwing the lower end of the second cylinder part 4 onto the upper end of the first cylinder part 3 and forming a space 6 between it and the outer cylinder 1. It is being A slide tube 7 is inserted into this guide tube 5, and this slide tube 7 has a spring 8 provided between the outer circumferential surface and the inner circumferential surface of the guide tube 5.
It is held elastically by. Slide tube 7
A support cylinder 10 is provided at the lower end of the apparatus via a connecting cylinder 9, and this support cylinder 10 holds a slider 12 having a through hole 11 through which a treatment instrument passes. Further, a communication hole 13 is bored in the peripheral wall of the first cylindrical portion 3 so that the space 6 and the inside of the guide tube 5 communicate with each other.
A cap 14 is fitted onto the upper end of the outer cylinder 1. This cap 14 is provided with a holding hole 15 to which the upper end of the guide tube 5 is connected, and a ventilation hole 16 for communicating the space 6 with outside air.

When suctioning mucus and dirt inside the body cavity, the holding hole 15 and the ventilation hole 16 are closed with fingers, and the suction tube 2, which had previously sucked outside air from the ventilation hole 16 through the space 6, The suction effect is shown by arrow a in the figure.
As the suction tube 2 acts on the inside of the body cavity through the channel, mucus and dirt inside the body cavity are sucked into the suction tube 2. In addition, when performing treatment with a treatment instrument and suction at the same time, it is sufficient to insert the treatment instrument from the slide tube 7 into the channel through the through hole 11 of the slider 12 and close the ventilation hole 16 with your finger. To do this, the tip of the syringe is fitted into the slide tube 7, and the slide tube 7 is pressed and slid against the restoring force of the spring 8, and the communication hole 13 is closed by the slider 12 that is displaced together with the slide tube 7. Then, the inside of the guide tube 5 is isolated from the space 6, so that liquid can be sent from the syringe into the body cavity via the channel.

However, according to such a configuration, in order to provide the suction control device with many functions, the outer cylinder 1,
Not only do three cylinders, the guide tube 5 and the slide tube 7, be required, but also the spring 8 must be installed between the guide tube 5 and the slide tube 7, which reduces costs due to an increase in the number of parts and complicated assembly work. The disadvantages were that it led to high costs and decreased productivity. Further, since the slider 12 that closes the communication hole 13 during liquid feeding is slidably provided on the guide tube 5, the sliding surface cannot be reliably sealed.
Therefore, a part of the liquid sent out from the syringe is sucked into the suction tube 2 through the space 6. The drawback was that it was not possible to send enough fluid into the body cavity. Furthermore, when suctioning mucus and dirt from the body cavity, it is inevitable that some of it will enter the spring 8 from the sliding surface of the guide tube 5 and the slider 12, but due to the complicated structure described above, This also had the disadvantage of not being able to clean mucus and dirt that had gotten into the details.

This invention was made based on the above-mentioned circumstances, and its purpose is to provide a simple structure without using many cylinders, and to prevent the channel side and the suction pipe side from being separated during liquid feeding. An object of the present invention is to provide an endoscope suction control device that can perform suction reliably regardless of the moving surface.

An embodiment of the present invention will be described below with reference to FIGS. 2 to 6. First, FIG. 2 shows the entire endoscope. This endoscope has an operating section 21 and an insertion section 22.
The operation section 21 is provided with an eyepiece section 23, an operation knob 24 for bending the tip of the insertion section 22, a light guide cable 25 connected to a light source device (not shown), and a suction control device 26. There is.

The suction control device 26 is constructed as shown in FIG. That is, the operating section 21 of the endoscope is integrally provided with a support tube 28 that communicates with a channel 27 opened at the distal end of the insertion section 22 via the operating section 21 . A first cylinder 32 in which a small diameter part 29 and a large diameter part 30 are continuous through a tapered part 31 is fitted into this support cylinder 28, and the lower end of the small diameter part 29 of this first cylinder 32 is connected to the channel 27
are airtightly connected to each other via an O-ring 33.
A suction tube 35 is connected to the peripheral wall of the large diameter portion 30 of the first cylinder 32 via a connection port 34, and this suction tube 35 communicates with a suction device 36 shown in FIG.

The upper peripheral wall of the first cylinder 32 and the support cylinder 2
Locking pieces 37 and 38 are provided protrudingly from the upper ends of the first cylinder 32 and the support tube 28, respectively, and a bayonet ring 39 that engages with these locking pieces 37 and 38 allows the first cylindrical body 32 to be detachably attached to the support cylinder 28. Fixed. Further, a presser body 42 having a presser flange 40 and a mounting flange 41 is screwed onto the upper end of the first cylindrical body 32, and the bayonet ring 39 is prevented from loosening by the presser flange 40 of the presser body 42. It is kept like that. A cap 43 made of an elastic material such as rubber or synthetic resin is attached to the attachment flange 41 of the presser body 42 by fitting into the fitting groove 44 thereof. A second cylindrical body 46 is connected to the cap 43 via an elastically expandable part 45.
is integrally molded. This second cylindrical body 46 is located in the large diameter portion 30 of the first cylindrical body 32, and forms a space 47 between this outer peripheral surface and the inner peripheral surface of the first cylindrical body 32. Further, the cap 43 is provided with a communication hole 48 that communicates the space 47 with the outside air.

The second cylindrical body 46 has a sixth cylinder on the inner circumferential surface of the upper end.
A stepped portion 51 into which the tip tapered portion 50 of the syringe 49 shown in the figure fits is formed, and the stepped portion 51 is in pressure contact with the outer peripheral surface of the tapered portion 50 of the syringe 49 to hold the tapered portion 50. A protrusion 52 is provided in a protruding manner. Further, the second cylindrical body 46 has a through hole 54 formed in its lower end surface through which a forceps 53 as a treatment tool shown in FIG. A first uneven portion 55 is formed as a portion. This first uneven portion 55 is similar to the second uneven portion 55.
When the first cylindrical body 32 is displaced by elastically deforming the telescopic portion 45 as shown in FIG.
A second fitting portion formed in the tapered portion 31 of
It is adapted to fit elastically and airtightly into the concave and convex portions 56 of. Note that the first and second uneven portions 55,
56 is disengaged with a force weaker than the pulling force required to release the pressure contact between the tapered portion 50 of the syringe 49 and the protrusion 52. Therefore, before the tapered portion 50 of the syringe 49 is removed from the stepped portion 51, the first uneven portion 55 is removed from the second uneven portion 56, and the second cylinder body 46 is returned to its original position.

Next, the operation of the above configuration will be explained. First, when the suction device 36 operates in the state shown in FIG. 3, suction force is generated in the suction tube 35.
Since outside air is suctioned from the communication hole 48 through the space 47 in the body cavity 5, no suction force is applied to the body cavity through the channel 27. and,
When suctioning mucus and dirt from the body cavity, the entire upper part of the cap 43, that is, the communication hole 48 and the upper end opening of the second cylindrical body 46, are closed with fingers, as shown in FIG. Then, the communication state between the space 47 and the outside air is cut off, so the suction force of the suction tube 35 acts on the channel 27, and mucus and dirt in the body cavity are transferred from the channel 27 through the space 47 to the suction tube. 3
5 will be attracted.

In addition, when using the forceps 53, as shown in FIG.
3 and guide it to the channel 27 through the through hole 54 of this second cylindrical body 46. At this time, the forceps 53 and the through hole 54 are in an airtight state with no gap, so the space 47 does not communicate with the outside air via the second cylindrical body 46. Then, the forceps 53
If you want to perform suction while using the cap, just cover the communication hole 48 of the cap 43 with your finger,
Since communication with the outside air of 7 is cut off, mucus and dirt in the body cavity can be suctioned.

Furthermore, when injecting a liquid such as a medicinal solution, as shown in FIG.
is fitted into the stepped portion 51 of the second cylindrical body 46. Then, push this syringe 49 into the second barrel 46.
When the telescopic portion 45 is elastically deformed and entered into the first cylindrical body 32, the first uneven portion 55 formed on the outer circumferential surface of the lower end portion becomes the tapered portion 3 of the first cylindrical body 32.
It fits into the second uneven portion 56 formed in the channel 27 and the space 47, and communication between the channel 27 and the space 47 is completely interrupted. Therefore, if liquid is allowed to flow out from the syringe 49 in this state, the liquid will be reliably sent into the body cavity via the channel 27 without being sucked by the suction force of the suction tube 35.

That is, according to the suction control device 26 configured as described above, the second cylinder 46 is held in the first cylinder 32 so as to be freely advanced and retracted, and the second cylinder 46 is displaced to provide the first and second cylinders. By fitting the concavo-convex portions 55 and 56, the communication state between the channel 27 and the space portion 47 communicating with the suction pipe 35 can be reliably interrupted. Therefore, since the structure is simple, not only can the entire cleaning be performed easily and reliably, but also the suction force from the suction tube 35 leaks to the channel 27 side during liquid feeding, causing the liquid to be sucked into the suction tube 35. There is no chance of being rejected.

Although the first cylindrical body 32 is inserted into the support tube 28 in the above embodiment, the support tube 28 may be used as the first cylindrical body 32. Also,
The second cylindrical body 46 connects to the cap 4 via the telescopic part 45.
Although these parts are integrally molded with 3, it is clear that they can be constructed to have the same function as the above embodiment without being integrally molded.

Further, in the above embodiment, the first cylindrical body 32 and the second cylindrical body 46 are connected by the elastic part 45 that expands and contracts elastically, but they do not need to be elastic, and may be connected by, for example, a bellows-like member. good. In this case, as the syringe 49 is pulled out, the first and second
Unfit the uneven parts 55 and 56 of the first cylindrical body 3.
2 and the second cylindrical body 46 can be brought into the state shown in FIG.

As described above, according to the suction control device of the present invention, although it has the same functions as conventional ones,
It was possible to create a double-tube structure consisting of a first cylinder and a second cylinder, which is extremely simple in structure compared to the conventional triple-tube structure. Therefore, the number of parts can be reduced and the entire device can be cleaned easily and reliably. Moreover, when feeding the liquid, the first
The channel side and the suction tube side are reliably isolated by the fitting of the fitting portion provided on the cylinder body and the second cylinder body, so that liquid is not sucked into the suction tube. do not have.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional suction control device, Figs. 2 to 6 show an embodiment of the present invention, Fig. 2 is a perspective view of an endoscope, and Fig. 3 is a sectional view of a suction control device. Cross-sectional view, Figure 4 is an explanatory diagram for suction operation, Figure 5 is
The figure is an explanatory diagram when using the treatment instrument, and FIG. 6 is an explanatory diagram when sending liquid. 27... Channel, 32... First cylindrical body, 35...
Suction pipe, 45... Telescopic part (connecting member), 46... Second
cylindrical body, 47...space part, 55...first uneven part (fitting part), 56...second uneven part (fitting part).

Claims (1)

[Claims] 1. A first cylinder that communicates with the channel of the endoscope and has a suction tube connected to its midway part, a second cylinder that is inserted into the first cylinder, and a second cylinder that is inserted into the first cylinder. a space formed between the second cylindrical body and the first cylindrical body;
When the second cylinder is displaced, the connecting member connects the cylinder to the first cylinder so that the cylinder can move back and forth, and the end of the second cylinder is elastically tightly fitted into the connecting member. The above-mentioned first step which interrupts the communication state between the channel and the space part.
1. A suction control device for an endoscope, comprising: a cylindrical body; and a fitting portion provided on a second cylindrical body. 2. The endoscope suction control device according to claim 1, wherein the second cylindrical body and the connecting member are integrally molded.