JPS5943166B2 - Endoscope suction control device - 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, insertion of treatment tools such as forceps, etc. through an RI 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 instruments into body cavities or inject medical solutions. It is configured so that it can be done.

Conventionally, such a suction control device has been designed as shown in FIG.

That is, numeral 1 in the figure is an outer cylinder to which a suction tube 2 is connected to the peripheral wall and whose lower end is connected to a channel of an 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 γ is inserted into the guide tube 5, and the slide tube γ is elastically held by a spring 8 provided between the outer circumferential surface and the inner circumferential surface of the guide tube 5.

A support tube 10 is provided at the lower end of the slide tube γ via a connecting tube 9, and the support tube 10 holds a slider 12 having a through hole 11 through which a treatment instrument passes.

Furthermore, the space 6 and the guide tube 5 are provided on the peripheral wall of the first cylindrical portion 3.
A communication hole 13 is provided to communicate the inside.

A cap 14 is fitted to the upper end of the outer cylinder 1.

The cap 14 is provided with a holding hole 15 connected to the upper end of the guide tube 5 and a ventilation hole 16 for communicating the space 6 with outside air.

When suctioning mucus and dirt inside the body cavity, if you close the holding hole 15 and the ventilation hole 16 with your fingers, the space 6
The suction action of the suction tube 2, which sucks outside air from the ventilation hole 16 through the vent hole 16, acts into the body cavity through the channel as shown by arrow a in the figure, so that mucus and dirt in the body cavity are removed from the suction tube 2.
is attracted to.

In addition, when performing treatment and suction using the treatment instrument at the same time, the treatment instrument is moved from the slide tube γ to the through hole 11 of the slider 12.
Insert the syringe into the channel through the syringe and close the vent hole 16 with your finger.If you want to send the liquid further, fit the tip of the syringe into the slide tube γ and push the slide tube γ away.
This slide tube 7 is pressed and slid against the restoring force of
If the communication hole 13 is closed by the slider 12 which is displaced at the same time, the inside of the guide tube 5 is cut off from the space 6, so that liquid can be sent from the syringe into the body cavity through the channel.

However, with such a configuration, in order to provide the suction control device with many functions, not only three cylinders, the outer cylinder 1, the guide cylinder 5, and the slide cylinder 7, are required, but also the guide cylinder 5 and the slide cylinder 7 are required. Since it is necessary to incorporate the spring 8 between the two parts, there are disadvantages in that the number of parts increases and the assembly work becomes complicated, resulting in higher costs and lower productivity.

Further, since the slider 12 that closes the communication hole 13 during liquid feeding is slidably provided on the guide tube 5, it is not possible to reliably seal the sliding surface with the slider 12.

Therefore, a portion of the liquid delivered from the syringe is transferred to the space 6.
There was a drawback that the liquid was sucked into the suction tube 2 through the body cavity, and the liquid could not be sufficiently sent 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 had the disadvantage that it was impossible to clean mucus and dirt that had gotten into the details.

This invention was made based on the above 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 consists of an operating section 21 and an insertion section 22. The operating section 21 includes an eyepiece section 23, an operation knob 24 for bending the tip of the insertion section 22, and a light connected to a light source device (not shown). A guide cable 25 and a suction control device 26 are provided.

The suction control device 26 is constructed as shown in FIG.

That is, the operation section 21 of the endoscope is integrally provided with a support tube 28 that communicates with a channel 2γ opened at the distal end of the insertion section 22 via the insertion section 21.

A first cylindrical body 32 in which a small diameter portion 29 and a large diameter portion 30 are continuous via a tapered portion 31 is fitted into this support tube 28,
The lower end of the small diameter portion 29 of the first cylindrical body 32 is airtightly connected to the channel 2γ via an O-ring 33.

A suction tube 35 is connected to the peripheral wall of the large diameter portion 300 of the first cylindrical body 32 via a connection port body 34, and this suction tube 35 communicates with a suction device 36 shown in FIG.

Locking pieces 37 and 38 are protruded from the upper circumferential wall of the first cylindrical body 32 and the upper end of the support cylinder 28, respectively, and a bayonet ring 39 that engages with these locking pieces 3γ and 38 allows the first A cylinder 32 is detachably fixed to the support cylinder 28.

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 held by the presser flange 40 of the presser body 42 so that it does not loosen. has been done.

Attaching 7 of the presser body 42 A second cylindrical cap portion 43 formed of an elastic material such as rubber or synthetic resin is attached to the flange 41 by fitting into its fitting groove 44 .

A cylindrical body part 46 is integrally molded into the cap part 43 via an elastic part 45 that expands and contracts elastically.

The cylindrical portion 46 of the second cylindrical body is located in the large diameter portion 30 of the first cylindrical body 320, and forms a space 41 between the outer circumferential surface and the inner circumferential surface of the first cylindrical body 32. ing.

Further, the cap portion 43 is provided with a communication hole 48 that communicates the space portion 4γ with the outside air.

The cylindrical body portion 46 has a stepped portion 51 formed on the inner circumferential surface of the upper end into which the tapered tip portion 50 of the syringe 49 shown in FIG. A protrusion 52 that presses against the outer peripheral surface of the portion 50 and holds the tapered portion 50 is provided in a protruding manner.

Furthermore, a through hole 54 is formed in the lower end surface of the cylinder 46, through which a forceps 53 as a treatment tool shown in FIG. 5 is tightly inserted.

The lower end portion of this cylindrical body portion 46 is formed when the cylindrical body portion 46 is displaced by elastically deforming the telescopic portion 45 as shown in FIG.
The concave portion 55 serving as an abutting portion formed in the tapered portion 31 of the first cylindrical body 32 is airtightly sealed.

Next, the operation of the above configuration will be explained.

First, when the suction device 36 is activated in the state shown in FIG.
Suction force is generated in the suction tube 35, but since outside air is sucked into the suction tube 35 from the communication hole 48 via the space 47,
No suction force acts within the body cavity through the channel 27.

When suctioning mucus and dirt inside the body cavity, the fourth
As shown in the figure, the entire upper part of the cap part 43, that is, the communication hole 48 and the upper end opening of the cylindrical part 46, are closed with a finger.

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 2γ, and mucus and dirt in the body cavity are transferred from the channel 27 through the space 47 to the suction tube. It will be attracted to 35.

When using the forceps 53, insert the forceps 53 from the upper end opening of the second cylindrical body as shown in FIG. lead to.

At this time, the forceps 53 and the through hole 54 are in an airtight state with no gap, so the space 4γ does not communicate with the outside air via the second cylindrical body.

When you want to perform suction while using the forceps 53, just cover the communication hole 48 of the cap part 43 with your fingers, and the communication state of the space 4γ with the outside air is cut off, so that mucus and dirt in the body cavity can be removed. Can be inhaled.

Further, when injecting a liquid such as a medicinal solution, the tapered tip portion 50 of the syringe 49 is fitted into the stepped portion 51 of the cylindrical body portion 46, as shown in FIG.

When the syringe 49 is pushed in and the cylindrical body part 46 enters the first cylindrical body 32 by elastically deforming the telescopic part 45, this lower end part is formed into the tapered part 31 of the first cylindrical body 32. The channel 2γ and the space 4γ are completely disconnected from each other by airtightly contacting the recess 56.

Therefore, if the liquid is allowed to flow out from the syringe 49 in this state, the liquid will be reliably sent into the body cavity through the channel 2T 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 first
The cylindrical body part 46 of the second cylindrical body is held in the cylindrical body 32 so as to be freely advanced and retracted, and the cylindrical body part 46 is displaced to bring its lower end into airtight contact with the recess 55 formed in the tapered part 31. By doing so, the space 4 communicating with the channel 2γ and the suction pipe 35 is
The communication state with γ can be reliably cut off.

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 2γ side during liquid feeding, and the liquid is sucked into the suction tube 35. There is no need to put it away.

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.

Further, although the cylindrical body portion 46 of the second cylindrical body is integrally molded with the cap 43 via the telescopic portion 45, it is possible to have a structure having the same function as in the above embodiment without being integrally molded. it is obvious.

As described above, according to the suction control device of the present invention, the first cylinder and the second cylinder have an extremely simple structure compared to the conventional triple cylinder structure, although they have the same functions as conventional ones. We were able to create a double-tube structure consisting of a cylindrical body.

Therefore, the number of parts can be reduced and the entire device can be cleaned easily and reliably.

Moreover, during liquid feeding, the end of the first cylindrical body comes into close contact with the contact portion formed on the second cylindrical body, and the channel side and the suction pipe side are reliably isolated. No liquid will be sucked into the suction tube.

[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. A sectional view, FIG. 4 is an explanatory diagram when a suction operation is performed, FIG. 5 is an explanatory diagram when the treatment tool is used, and FIG. 6 is an explanatory diagram when liquid is delivered. 27... Channel, 32... First cylindrical body, 35...
... Suction tube, 45... Telescopic part (connection part), 46...
Cylindrical body part, 4γ... Space part, 55... Concave part (contact part)
.

Claims (1)

[Scope of Claims] 1. A first cylindrical body having a small diameter portion that communicates with a channel of an endoscope, a large diameter portion that communicates with the outside air, and an abutment portion formed between the small diameter portion and the large diameter portion. and a space between the first cylindrical body and the first cylindrical body so as to be movable in the axial direction of the channel, and supported by the axially expandable connecting part, and at the lower end thereof. It consists of a second cylindrical body that closely abuts the abutment portion and blocks the channel and the space, and a suction pipe that opens in the large diameter portion of the first cylindrical body and communicates with the space. Characteristic endoscope suction control device. 2 The second cylindrical body includes a cylindrical body portion, a connecting portion extending laterally from an upper end of the cylindrical body portion, and a connecting portion that supports the connecting portion and is attached to the first cylindrical body in correspondence with the first cylindrical body. and a communication hole formed in the cap part that communicates the space created when the second cylindrical body is attached to the first cylindrical body with the outside air. A suction control device for an endoscope according to claim 1. 3. The suction control device for an endoscope according to claim 2, wherein the cylindrical body portion and the connecting portion are integrally molded. 4. The suction control device for an endoscope according to claim 2, wherein the cap portion and the connecting portion are integrally molded. 5. The suction control device for an endoscope according to claim 2, wherein the cylindrical body part, the cap part, and the connecting part are integrally molded.