JPS6317447Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an endoscope that can perform selective suction from two forceps channels with a simple operation.

When examining the inside of a body cavity using an endoscope, mucus, bleeding blood, etc. in the body cavity, or a contrast agent injected using a catheter may adhere to the objective lens window, obstructing the observation. Furthermore, observation may be obstructed by cauterization smoke generated when tissue within a body cavity is resected using a high-frequency treatment instrument, a laser scalpel, or the like using an endoscope. In order to continue observation in these cases, it is necessary to quickly expel the mucus, contrast agent, or cauterization smoke from the body using the forceps channel of the endoscope. However, biopsy forceps, treatment instruments, etc. are often inserted through the forceps channel, and if suction is performed with the biopsy forceps etc. inserted, the biopsy forceps will block most of the forceps channel. Therefore, sufficient suction cannot be achieved. Therefore, each time an aspiration is performed, the examiner has to pull out the biopsy forceps or the like from the forceps channel. In an endoscope equipped with two forceps channels,
Although it is possible to insert biopsy forceps etc. into one forceps channel and perform sufficient suction from the other forceps channel, the forceps channel connected to the suction pump is always empty. It doesn't necessarily mean that it is. If forceps, etc. are inserted into the forceps channel that performs suction, it would be cumbersome to have to remove the forceps before suctioning, as in the case of one system of forceps channels. There was a desire for an endoscope that could selectively aspirate from

The present invention has been made to meet the above-mentioned requirements, and provides an endoscope that can perform suction from either of the two forceps channels by simple operation.

Hereinafter, according to the preferred embodiment shown in the attached drawings,
The present invention will be explained in detail.

FIG. 1 is a longitudinal sectional side view showing an endoscope that is an embodiment of the present invention. In this example, for suction, the distal end 1 of the endoscope is equipped with forceps channel openings 2 and 3, the flexible tube section 4 accommodates forceps channels 5 and 6, and the operating section 7 has a forceps opening. 8, 9 and a suction operation mechanism 10 are provided, and a suction pump 11 is connected to the suction operation mechanism 10 of the endoscope via a suction tube 12. Further, in the figure, 13 is an eyepiece, 14 is an eyepiece, and 15 is a forceps plug for closing the forceps ports 8 and 9. The forceps plug 15 is made of an elastic material such as rubber and has a cut in the center, so that forceps etc. can be inserted while the forceps plug 15 is attached to the forceps ports 8 and 9. The forceps ports 8 and 9 can be kept closed by pressing the notches. In addition, the endoscope of this embodiment has an objective lens window, an illumination window, an air/water supply nozzle, etc. in the distal end 1, and an optical fiber bundle, a forceps channel, an air/water supply channel, etc. in the flexible tube part 4. , the flexible tube section 4 is attached to the operation section 7.
It has a bending operation mechanism for controlling the curvature of the curved pipe, which is a part of the pipe, and an air/water supply switching mechanism, etc., but these are not shown because they are unnecessary for the explanation of the present invention.

As shown in FIGS. 2 to 4, the suction operation mechanism 10 has a cylinder 16 and communication parts such as a communication hole, a communication groove, and a through hole, and a first piston 17 and a first piston 17 provided coaxially with the cylinder 16. Second piston 18
The first piston 17 is the second piston 1.
8 and the second piston 18 is fitted into the cylinder 16. In the figure, the right end of the cylinder 16 is fixed to the operating part 7, the right ends of the pistons 17 and 18 are provided with flanges 19 and 20, and a weak spring 21 is provided around the piston 17 between the flanges 19 and 20. is wound to urge the first piston 17 to the right with respect to the second piston 18. A strong spring 22 is wound between the collar 20 and the right end of the cylinder 16, and the second piston 18
is biased toward the right with respect to the cylinder 16.

A suction tube 12 from the suction pump 11 is connected to the cylinder 16 via a suction pipe 23, and branch tubes 24 and 25 are connected to the suction pipe 23 at approximately equal distances in the axial direction to the right and left in the figure. . The branch tube 24 connects the cylinder 16 and the forceps channel 5, and the branch tube 25 connects the cylinder 16.
and forceps channel 6 are connected.

As shown in FIG. 2, when the second piston 18 is not pushed in, the suction pipe 23
A communication hole 26 is formed at a position corresponding to the opening of the branch tube 25, a communication hole 27 is formed at a position corresponding to the opening of the branch tube 25, and a wide communication groove 28 is formed on the outer periphery of the piston 18 on the right side of the communication hole 26 in the figure. do.

A through hole 17a is formed in the first piston 17 along its axis, and as shown in FIG.
7 and 18, a communication hole 29 is bored at a position corresponding to the opening of the suction pipe 23 and the communication hole 26, and a wide communication groove 30 is formed on the outer periphery of the first piston 17, as shown in FIG. With only the first piston 17 pushed in, as shown in FIG.

As shown in FIG.
2 is connected to the through hole 17a of the first piston 17 via the suction pipe 23 and the communication holes 26, 29,
The suction pump 11 sucks outside air through the through hole 17a. As shown in FIG. 3, the first piston 1
When only 7 is pushed in, the suction pipe 23 is connected to the branch tube 25 via the communication hole 26, the communication groove 30, and the communication hole 27, and suction is performed from the forceps opening 3. As shown in FIG. 4, the piston 17,
When both 18 are pushed in, the suction pipe 2
3 is connected to the branch tube 24 via the communication groove 28, and suction from the forceps opening 2 is performed. Also the fourth
Although the figure shows a state in which both the pistons 17 and 18 are pushed in, it is clear that the same suction can be achieved even if only the piston 18 is pushed in with a finger placed on the collar 20.

FIG. 5 shows another embodiment of the invention.
This embodiment differs from the previously described embodiments in that the branch tube 25 from the forceps channel 6 is omitted, and the tubular portion of the forceps mouth 9 and the cylinder 16 are directly connected through an opening 25'. FIG. 6 shows a cross section of the suction operation mechanism 10 in a state in which only the piston 17 is pushed in (corresponding to FIG. 3) in this embodiment. The suction pipe 23 has a communication hole 26, a communication groove 30,
It is connected to the tubular portion of the forceps opening 9 through the communication hole 27 and the opening 25', and suction from the forceps opening 3 is performed. In this embodiment, only the branch tube 25 is omitted, but it is also possible to omit the branch tube 24 in the same manner. Furthermore, the connections between the branch tubes 24, 25 and the connecting pipe 23 and the cylinder 16 can be modified in various ways depending on their arrangement. In addition, the communication holes 26, 27, 2 mentioned above as communication parts
9 and the communication grooves 28, 30 are the pistons 17, 18.
pistons 17, 1 that can selectively connect the tubes 24, 25 and the suction pipe 23 depending on the position of the pistons 17, 1;
It goes without saying that various changes can be made to the communication section provided in section 8 within the scope of the present invention.

According to the endoscope according to the present invention, two
With the simple operation of pushing two pistons apart,
It is possible to perform sufficient suction from the empty channel while the forceps etc. are inserted into either of the two forceps channels. 2 forceps channels
If the forceps channel is always empty, it has the advantage that even if one forceps channel becomes clogged due to suctioning in internal waste during suction, suction can be immediately performed from the other forceps channel. be.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional side view showing an embodiment of the present invention;
FIGS. 2 to 4 are longitudinal side views showing the suction operation mechanism of the same embodiment, FIG. 5 is a longitudinal side view showing another embodiment, and FIG. 6 is a cross-sectional front view showing the suction operation mechanism of the same embodiment. It is a diagram. 2, 3... Forceps channel opening, 5, 6... Forceps channel, 8, 9... Forceps opening, 10... Suction operation mechanism, 11... Suction pump, 12... Suction tube, 16... Cylinder, 17 ...First piston, 17a...Through hole, 18...Second piston,
23... Suction pipe, 24, 25... Branch tube, 26, 27, 29... Communication hole, 28, 30...
...Communication groove.

Claims (1)

[Claims for Utility Model Registration] A system comprising two systems of forceps channels and a suction operation mechanism consisting of a cylinder and a first piston and a second piston provided coaxially with respect to the cylinder; A suction tube from a suction pump is connected to the cylinder, and communication portions provided on the two pistons selectively communicate the forceps channel or the outside with the suction tube according to changes in the positions of the two pistons. An endoscope that is characterized by: