JP3276200B2 - Endoscope forceps raising device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forceps raising device of an endoscope for raising the distal end of a treatment tool such as forceps.

[0002]

2. Description of the Related Art In general, a forceps raising device of an endoscope is configured to drive a forceps raising piece provided at a distal end of an insertion portion via an operation wire which is advanced and retracted from a proximal operation portion. I have.

[0003] However, if the waste liquid or the like that invades from the distal end side between the operation wire and the operation wire guide tube is left as it is, it hardens and the operation of the operation wire becomes defective. There is a risk of infection through the sewage to the next patient.

Therefore, conventionally, packing has been provided at the opening of the forceps raising operation wire guide tube so as to prevent infiltration of dirt or the like from the distal end side between the operation wire and the guide tube (see Japanese Utility Model Application Laid-Open No. 52-163). No.-67790), a liquid injection port is formed in communication with a hand side of an operation wire guide pipe, and a cleaning liquid is injected from the liquid injection pipe so that contaminated liquid or the like that has entered the guide pipe flows out. 52-38987).

[0005]

However, it is difficult to completely prevent the infiltration of waste liquid into the inside even in the case where the packing is provided at the opening of the operation wire guide tube. Once the dirt or the like enters the inside, the dirt or the like cannot be washed and discharged due to the presence of the packing, so that operation failure due to the sticking phenomenon of the operation wire has been caused.

On the other hand, in the case where the injection port is formed at the proximal side of the operation wire guide tube, the cleaning liquid must be discharged from the distal end side of the operation wire guide tube. do not go.

[0007] Therefore, a large amount of waste liquid infiltrates between the operation wire and the operation wire guide tube each time it is used. However, there is a disadvantage that it is not easy to completely discharge the waste liquid even if the washing after use is performed very carefully.

Therefore, the present invention makes it difficult for dirt or the like to enter the gap between the forceps raising operation wire and the operation wire guide tube from the front side during use of the endoscope, and to easily remove the gap after use. An object of the present invention is to provide a forceps raising device for an endoscope that can be washed.

[0009]

In order to achieve the above object, a forceps raising device for an endoscope according to the present invention is provided with a packing provided at an opening of a forceps raising operation wire guide tube and an operation wire and a guide tube. In a forceps raising device of an endoscope in which a gap between the guide tube and the guide tube is sealed, a liquid inlet for injecting a liquid from the base end side is provided in the guide tube, and the guide tube is provided inside the packing with respect to the packing. Wherein a bypass hole communicating with and opening to the outer surface is provided, and a detachable plug for closing the opening of the bypass hole is provided.

The stopper is formed of an electrically insulating material so as to surround the distal end main body of the endoscope in which the forceps raising device is disposed, and is provided detachably with respect to the distal end main body. It is good to form in a cap.

[0011]

An embodiment will be described with reference to the drawings. FIG.
FIG. 2 is a side cross-sectional view of the distal end of the insertion portion of the endoscope. FIG. 2 is a side cross-sectional view. 2
Are connected.

The endoscope of this embodiment is of a so-called side-view type in which the observation direction is directed to the side of the tube axis. They are arranged side by side. Reference numerals 5 and 6 denote air supply / water supply conduits for ejecting water and air to the surface of the observation window 3.

The distal end body 2 is surrounded by a distal end cap 8 made of an electrically insulating plastic material.
Into an engagement hole 10 formed in the inner surface of the tip of the tip cap 8.
, The tip cap 8 is fixed to the tip portion main body 2, and the spherical pin 9 and the engagement hole 10 are disengaged from each other by disengagement.

Between the distal end cap 8 and the distal end body 2, a forceps raising chamber 13 for accommodating a forceps raising base 12 for changing a projecting direction of a distal end of a treatment tool such as a forceps is provided in the observation window 3. And the illumination window 4.

As shown in FIG. 2, the distal end main body 2 communicates with the forceps raising chamber 13 and passes through the entire length of the lower end of the distal end body 2 into the insertion portion for inserting a treatment tool such as forceps. The distal end of the forceps channel 14 is connected.

As shown in FIG. 2 and FIG. 3 which is a front sectional view, the forceps raising table 12 can rotate in a forceps raising chamber 13 around a shaft 15 inserted into the distal end body 2. Are arranged as follows.

The distal end of the forceps raising operation wire 17 is connected to the rotating end side of the forceps raising table 12, and a guide hole 18 penetrated through the distal end body 2 and a rear end of the guide hole 18. Is inserted through the operation wire guide tube 19 connected to the main body so as to be able to advance and retreat. Reference numeral 20 denotes a connection pipe.

Therefore, by operating the operating wire 17 from the operating portion (not shown) connected to the base end side of the insertion portion, the forceps raising base 12 is rotated about the shaft 15 to raise the forceps raising portion. The direction of the tip of the forceps or the like protruding outward from the chamber 13 can be changed.

The operation wire 17 is covered with a thin coating tube 21 made of a synthetic resin, for example, by heat shrinkage, from a portion near the distal end to a portion located in the distal end body 2.

The gap between the distal end portion of the coating tube 21 and the operation wire 17 is closed in a water-tight manner by an adhesive 24, so that a dirt or the like from the distal end side into the gap can be prevented. Intrusion and soaking are prevented.

At the mouth of the guide hole 18 corresponding to the opening of the operation wire guide tube 19, an O-ring 22 for sealing is held so as to be in close contact with the outer peripheral surface of the coating tube 21 so as not to come out forward. It is held down and mounted. Therefore, the waste liquid or the like hardly enters the gap between the operation wire 17 and the operation wire guide tube 19.

Further, as shown in FIG. 1, O is inserted from the middle of the guide hole 18 which communicates straight with the operation wire guide tube 19.
A bypass hole 25 branched and formed on the inner side (rear side) of the ring 22 opens to the distal end portion main body 2 toward the front.

The opening 26 of the bypass hole 25
As shown in FIGS. 1 and 4, a hermetic plug 27 is formed integrally with the tip cap 8 and is constantly pressed against the opening 26. Therefore, no waste liquid or the like enters the inside of the bypass hole 25 from the opening 26.

However, since the stopper 27 is formed integrally with the tip cap 8, if the tip cap 8 is displaced forward from the tip main body 2, the stopper 27 also moves away from the opening 26 of the bypass hole 25 together therewith. , Bypass hole 25
Opens to the outside.

The operation wire 17 is operated to advance and retreat from the operation part side. As shown in FIG. 1, the operation part is connected with a liquid inlet 29 communicating with the base end of the operation wire guide tube 19. A rubber injection plug 30 having a slit in the center is attached to the mouth.

Therefore, if the injection plug 30 is removed or the slit of the injection plug 30 is pushed and expanded, and the cleaning liquid is injected into the operation wire guide tube 19 from the liquid injection port 29, the liquid is supplied to the operation wire 17 and the operation wire guide. The gas flows through the gap between the pipe 19 and is discharged outward from the bypass hole 25 from which the hermetic plug 27 is removed.

[0027]

According to the forceps raising device for an endoscope of the present invention, packing is provided at the opening of the forceps raising operation wire guide tube to seal the gap between the operation wire and the guide tube. It is necessary to clean the gap between the operation wire and the guide pipe because the gap between the operation wire and the guide pipe is provided because almost no waste liquid etc. in the gap penetrates, and a bypass hole communicating with the guide pipe and a plug for closing the opening are provided. In such a case, by injecting the liquid into the guide tube from the liquid inlet, the liquid whose gap has been washed is discharged from the bypass hole, and the gap can be easily and reliably washed.

If a plug for closing the opening of the bypass hole is provided on the distal end cap of the distal end body, the cost of parts is not increased, the opening and closing operation of the bypass hole is easy, and the plug may be lost. It has an excellent effect, such as no presence.

[Brief description of the drawings]

FIG. 1 is a schematic plan cross-sectional view of a distal end of an endoscope insertion portion of an embodiment.

FIG. 2 is a schematic side cross-sectional view of the distal end of the endoscope insertion portion of the embodiment.

FIG. 3 is a schematic front cross-sectional view of the distal end of the endoscope insertion section of the embodiment.

FIG. 4 is a perspective view of a tip cap of the embodiment.

[Explanation of symbols]

 2 Tip body 8 Tip cap 12 Forceps raising stand 17 Operation wire 19 Operation wire guide tube 22 O-ring 25 Bypass hole 27 Seal plug 29 Liquid inlet

Claims (1)

(57) [Claims] 1. A forceps sealed endoscope the gap between the packing in the opening of the guide tube for guiding the forceps raiser operation wire is provided above forceps raising operation wire and the <br/> guide tube Lifting device
A liquid injection port for injecting a liquid into the guide tube from the proximal end side of the guide tube is provided, and a bypass hole communicating with the guide tube inside the packing and opening to the outer surface is provided, in one provided a removable plug member for closing the opening of the bypass hole, the plug body is, ahead of the endoscope the forceps raising unit is arranged
Formed by electrical insulation to surround the end body
The tip cap, which is detachably attached to the tip
A forceps raising device for an endoscope, wherein the device is formed on a clamp.