JPS5854924A - Suction apparatus of endoscope - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a suction device for an endoscope that allows easy brushing of a suction channel.

Generally, some endoscopes are equipped with a suction line for suctioning and removing mucus, dirt, blood, and the like within a body cavity. This suction line normally consists of a first tube located upstream from the operating section of the endoscope to the distal end of the insertion section, and an
4-The second tube is downstream to the connector connected to the end of the monkey cord, and one end of these tubes located inside the operating section is connected to the cylinder of the suction switching valve provided in the operating section. It is connected to the. Suction can be performed by operating the suction switching valve at the bottom.

Incidentally, in recent years, nosocomial infections caused by HB antigens have become a problem, and in particular, suction pipes that are contaminated with patient's blood can be exposed simply by passing a disinfectant through them, so it is necessary to insert a brush and brush the inside. is being sued. In order to brush the suction conduit, the other upstream end of the suction conduit opens at the distal end of the insertion section, and the other downstream end opens at the mouthpiece of the connector. The brush may be inserted through the entire length of the suction line from one side of the line. However, when brushing in this way,
Since the brush has to pass through the cylinder in the middle, the brush may get caught in this part and cause the brush to pierce through the cylinder.
There are cases where the sink cannot be properly performed. In addition, since the suction switching valve has a leak path for sucking the atmosphere when no suction operation is being performed, in the case of inserting the brush from the distal end of the insertion part or the mouthpiece as described above, Dirt in the suction pipe is pushed up into the cylinder of the suction switching valve, and from there it leaks into the operating section via the leak path.This operating section is equipped with an angle knob and an eyepiece. If these become contaminated, a problem arises in that a great deal of effort is required to clean and disinfect them.

Therefore, it has been considered to provide a piston constituting the suction switching valve in a removable manner to the cylinder, and to insert brushes from the cylinder into the upstream and downstream sides of the suction pipe by removing the piston. ing. However, if the above-mentioned piston were simply configured to be detachable from the cylinder, the inner diameter of the cylinder would be so small that the piston would be slidably inserted into it, and the suction pipe connected to the cylinder would be too small. There is a problem in that it is necessary to insert the brush from a small diameter cylinder into the tubes on the upstream and downstream sides of the passage.

In addition, the inner circumferential surface of the cylinder is usually an uneven surface with grooves formed therein to connect or disconnect the upstream and downstream sides of the suction pipe line by operating the piston.
There also arises the problem that it takes a lot of effort to clean the dirt and the like adhering to the inner circumferential surface.

This invention was made based on the above circumstances, and its purpose is to connect a suction switching valve to a first cylinder to which a suction pipe is connected, and a second cylinder that is detachable from the first cylinder. By comprising a cylinder and a piston that is slidably inserted into the second cylinder, the inner diameter of the first cylinder can be made sufficiently larger than the diameter of the piston. An object of the present invention is to provide a suction device for an endoscope whose inner peripheral surface can be made smooth without unevenness.

A first embodiment of the invention will be described below with reference to FIGS. 1 to 4. 1 in FIG. 1 is an endoscope. This endoscope 1 consists of an insertion section 2 and an operating section 3, and a universal cord 5 having a connector 4 at its end is connected to the operating section 3.

Further, the insertion section 2 is provided with an observation optical system 6, and this observation optical system 6 is optically connected to an eyepiece section 7 provided on the operation section 3.

On the other hand, a suction channel 8 is formed in the endoscope 1 . This suction pipe line 8 is connected to the first channel on the upstream side from the insertion section 2 to the operating section 3. 9, and a second gourd 10 on the upstream side extending from the operating section 3 via the universal cord 5 to the connector 4. The first chain 9 above
One end is connected to the suction switching valve 1 provided on the operating section 3, and the other end is connected to the distal end surface Ja of the insertion section 2. One end of the second tube 10 is connected to the suction switching valve 1), and the other end communicates with a base 41 connected to a suction pump fK (not shown) provided on the connector 4.

The suction switching valve 11 is constructed as shown in FIGS. 2 and 3. That is, a mounting hole 12 is bored in the wall 3a of the operating section 3, and the first cylinder 1 is inserted into this mounting hole 12.
3 is fitted into this first cylinder 3.
One end of the operating portion 3 protruding from a is open, and the inner circumferential surface is smooth and has a bottomed cylindrical shape, and a stepped portion 14 that engages with the inner surface of the wall 3 is formed in the middle of the outer circumferential wall. A screw 15 is formed on the outer peripheral surface of one end. The first cylinder 13 is fixed to the wall 3a by an annular stopper 16 screwed onto the screw 15. The stopper body 16
It has a substantially U-shaped cross section with an upper flange 16 and a lower flange 16b having a larger diameter than the upper 7 flange 16a, and the lower flange 16b is joined to the outer surface of the wall 3a. Further, at the bottom of the first cylinder II, a first connecting pipe 11 is provided at a position offset from the center in the radial direction, and a second connecting pipe 18 is provided at the center in the radial direction. This second connecting pipe 18 consists of a large diameter part 18a and a small diameter part 18b, and an abutment step part 19 is formed at the boundary between these parts. Then, the first tube 9 is connected to the first connecting pipe 11.
One end is connected to the small diameter portion 11b of the second connecting pipe 18.
One end of the second chip 10 is connected to.

That is, 1st. One end of the second cylinder 9, 10f) is connected to the bottom of the first cylinder 13 so as to open. Further, the first cylinder 13 has a second cylinder 20
is inserted. The second cylinder 20 has its outer circumferential surface hermetically joined to the inner circumferential surface of the first cylinder 13, and protrudes from the first cylinder 13 and has an upper flange 16m of the stopper 16 at its rounded upper end. A flange 21 having approximately the same diameter is formed, and an insertion hole 22 penetrating in the axial direction is bored in the center of the flange 21 . A piston 2S is fitted into the insertion hole 22 so as to be vertically movable. A leak passage 24 extending over the entire length in the axial direction is bored in the Ninogi stone 23, and a communication hole 25 communicating with the leak passage 24 is provided in the middle of the peripheral wall. Further, the piston 23 has a concave portion 26 having a rectangular cross-section formed at one end projecting outward from the second cylinder 20 . The piston 23 is elastically held by a biasing member 27 made of an elastic material such as synthetic resin or rubber so that one end thereof protrudes from the second cylinder 20, as shown in FIG. That is, the biasing member 27 has a substantially skirt shape with open upper and lower surfaces, and has an annular collar portion 2 at the upper end that projects radially inward.
8 is formed, and a first annular groove 29 and a second annular groove 30 are formed on the inner peripheral surface of the lower end portion. The biasing member 27 is the first biasing member 27. The second annular grooves 29 and 30 are connected to the upper flange 16a of the stopper body 16 and the flange 21 of the second cylinder 20.
The annular collar portion 28 is fitted into the recess 26 of the piston 23 so as to cover the outer circumferential surface of the piston 23. Therefore, by removing the first annular groove 29 of the biasing member 27 from the upper flange 16a of the stopper 16, the biasing member 27
At the same time, the piston 23 and the second cylinder 20 can be removed from the first cylinder 13.

Note that when the piston 23 is held by the biasing member 21 as shown in FIG. Since it is fitted into the second connecting pipe 18, the first tube 9 and the second tube 1o are cut off. Further, as shown in FIG. 3, when the piston 23 is pushed against the restoring force of the biasing member 21 until its lower end surface abuts against the abutment step 19 formed in the second connecting pipe J8, the above-mentioned Since the communication hole 25 is exposed from the insertion hole 2z of the second cylinder 20, the first gourd 9 and the second tube 1o communicate with each other through the communication hole 25.

In the endoscope having such a configuration, the base 4 of the connector 4
When the suction pump (not shown) connected to a is activated, the first tube 9 and the second tube 1o are connected to each other when the suction switching valve 1no is not operated as shown in FIG.
Since the air is blocked by the piston 23, atmospheric air is sucked in through the leak passage 24 of the piston 23 by the suction force acting on the second valve 10. therefore,
Dirt inside the body cavity will not be sucked out. To suction and remove dirt from the body cavity, as shown in FIG. 3, the leak passage 24 is closed with a finger and the piston 23 is pushed in. Then, the first tube 9 and the second tube 10 communicate with each other through the communication hole 25 of the piston 23, so that the suction force acts on the first tube 9 through the second tube 10 and is drawn into the body cavity. The filth etc. will be removed by suction.

The endoscope 1 used in this way has its suction pipe 8
Since the suction pipe 8 becomes contaminated with dirt and the like, the suction pipe 8 must be cleaned after use. In that case, the fourth
A cleaning device 31 as shown in the figure is used. This cleaning device 3
The cover 33 consists of a brush 32 and a cover 33 made of a transparent elastic material such as flexible synthetic resin or DEM.

That is, the brush 32 is formed by providing an upper part 35 by providing brush bristles of a predetermined length at the tips of twisted wires 34.

Further, the car 4-33 has a cap shape with an open bottom, and a mounting groove 36 is formed on the inner peripheral surface of the lower end to removably fit into the upper flange 16m of the stopper 16. A through hole 37 is bored at the top of the brush, and the wire 34 of the brush 32 is inserted through the through hole 37 in a substantially airtight state. Note that the height of the cover 33 is determined by the height of the space formed between the force and force 33 and the first cylinder 13 when the force and force 33 is attached to the stopper body 16, as will be described later. It is set to be longer than the length of the upper part 35 of the brush 32.

To clean, proceed as follows. First, after suctioning enough disinfectant into the suction pipe 8 by normal suction operation,
After suctioning air and draining the suction pipe 8,
Stop suction bong 7#. Next, the piston 23 and the second cylinder 20 are removed from the first cylinder 13 together with the biasing member 27, and then the brush 32 is inserted and the running force 4-33 is transferred to the opening of the first cylinder 13, i.e. Fit the attachment #1136 to the upper flange 16m of the stopper J6 and attach it. Once the cover 33 is attached, this force 1-t-33 is transparent, so the brush 3 can be applied while looking inside.
2 is first inserted into the first tube 9 through the first connecting pipe 17, the upper part 35 is protruded from the distal end surface 2a of the insertion section 2, and then the distal end of the insertion section 2 is placed in the disinfectant solution.

Here, the suction ponder is operated again, and the brush 32 is pulled while sucking the disinfectant solution, thereby disinfecting the first chip 9 while brushing it. At this time, since the cover 33 is attached to the first cylinder 13 and the wire 34 of the brush 32 and the through hole 37 of the force a4 33 are in an almost airtight state, disinfectant solution and dirt are exposed to the outside. No scattering. Then, the user brushes the inside of the first tube 9 while observing the color of the disinfectant flowing inside the first cylinder 13 through the transparent cover 33.

After completing the plugging and shinging in the first tube 9 in this way, insert the upper part 35 of the brush 32 into the first tube 9.
and put it into the second tube 10. At this time, the length of the upper part 35 of the brush 32 is shorter than the height of the space formed by the first cylinder 13 and the cover 33. It can be transferred from the first tube 9 to the second tube 10 and is hygienic. In this way, the brush 32
Once passed through the tube 10, brush the second tube 0 in the same way as the first tube 9 while running the disinfectant. When brushing the second tube 10, use the mouthpiece 41 of the connector 4 and the suction pump! If you connect the brush 32 with a transparent hose, you can check whether the upper part 35 protrudes from the base 4m when the brush 32 is passed through the second tip 10. The color of the disinfectant flowing through the breather 10 can also be confirmed.

That is, according to the suction switching valve 111/C having the above configuration, the flow from the first cylinder 13 to the second cylinder 20 and the piston 2
3 can be removed, the first cylinder 1 can be removed.
A brush 32 can be inserted into the first tube 9 and the second tube 10 of the suction pipe line 8 from the insertion hole 2 formed in the second cylinder 20 through the piston 23.
2, the inner diameter of the first cylinder 13 can be made sufficiently larger than the outer diameter of the piston 23. Therefore, from the first cylinder 13 to the first cylinder. It is easy to insert the brush 32 into the second tube 9.10. Furthermore, by displacing the piston 23 with respect to the second cylinder jOK, the first valve 9
It is possible to communicate or cut off the communication between the terminal and the second channel 1o. Therefore, it is possible to make the inner circumferential surface of the first cylinder 13 a smooth surface without forming a groove or the like on the inner circumferential surface of the first cylinder 13, making it easier to clean dirt and the like that adhere to the inner circumferential surface of the first cylinder 13. It can be done easily.

In addition, when brushing the suction conduit 8 without using the cover 33, it is sufficient to stop the suction pump and perform only brushing while letting the disinfectant solution flow.

FIG. 5 shows a second embodiment of the present invention, in which a piston 23 is inserted into the insertion hole 22 of the second cylinder 20.
was drilled at an eccentric position of this second cylinder 20. Then, an annular flange 28 for holding the piston 23 formed on the biasing member 27 is made eccentric so as to correspond to the insertion hole 22, and a second gourd to which one end of the second gourd 10 is connected is made. A connecting pipe 18 was also connected to the bottom of the first cylinder 13 at an eccentric position corresponding to the piston 23. Furthermore, a first connecting pipe 17 to which one end of the first chain 9 is connected
to the bottom of the first cylinder 13, this first cylinder, 1
Connected at an angle to the axis of 3.

According to such a configuration, the second connecting pipe 18 is eccentrically connected to the bottom of the first cylinder 13, which makes the first connecting pipe 12 more compact than in the first embodiment. Since the connection can be made while being shifted in the direction of the center axis of the bottom of the first cylinder 13, it is easier to insert the brush 32 from the first connecting pipe 11 into the first chain 9, and furthermore, the brush 32 can be easily inserted into the first connecting pipe 11. The fact that the brush 17 is inclined also makes it easier to insert the brush 32.

FIG. 6 shows the third embodiment of this invention, and this embodiment is the fifth embodiment.
This embodiment is almost the same as the third embodiment shown in the figure, but the configuration of the second cylinder 20 is different.

That is, when the second cylinder 20 is bored with a horizontal hole 38 and a vertical hole 39 whose one end communicates with the horizontal hole 38 and whose other end opens at the lower end surface of the second cylinder 20, and when the piston 23 is pushed in. First chive 9 and second chive 10 are communicated through the vertical hole 39, the horizontal hole 38, the communication hole 25 of the piston 23, and the leak hole 24. Even in such a configuration, the same effects as in the second embodiment can be obtained.

FIG. 7 shows a fourth embodiment of this invention, and this embodiment is a second embodiment.
．． The suction mechanism is different from the third embodiment. That is,
The piston 23 is provided with a collar 40 at a location protruding from the second cylinder 20, and is provided with a communicating passage 41 that is open only on its lower end surface. That is, the piston 23 is not provided with the leak hole 24 that penetrates the entire length in the axial direction as in the above embodiments.

A first connecting pipe 12 to which the first cheep 9 is connected is provided at an eccentric position on the bottom of the first cylinder 13 corresponding to the piston 23, and a second connecting pipe 12 to which the second cheep 10 is connected is provided.
The connecting pipe 18 is provided at an angle to the axis of the first cylinder 13. Further, the piston 23 is provided with a communication hole 25 that communicates with the communication path 41 .

On the other hand, in the second cylinder 20, a first ventilation hole 42 penetrating in the axial direction is bored parallel to the insertion hole 22 at a position where it is closed by the collar 40 when the piston 23 is pushed in. .

Further, a second ventilation hole 43 is bored in the peripheral wall of the biasing member 27 .

According to such a configuration, when the piston 23 is not operated, outside air is sucked through the first ventilation hole 42 and the second ventilation hole 43 by the suction force generated in the second chisub 10. Further, when the piston 23 is pushed in until the collar 40 contacts the upper surface of the second cylinder 20, the first ventilation hole 42 is closed by the collar 40 and the communication hole 25 bored in the piston 23 is opened to the second cylinder 20. Since it is exposed from the lower end surface of the cylinder 20, the first tube 9 and the second cheap JO communicate with each other through the communication hole 25, and dirt and the like in the body cavity are suctioned and removed. In other words, even in such a configuration, not only can the same effects as those of the above embodiments be obtained without impairing the function of the suction switching valve 11, but also the leak path 24 can be closed with fingers during suction operation as in the above embodiments. Since there is no need to block the leak passage 24, the hands and fingers are often contaminated by dirt etc. spewed out from the leak passage 24.

As described above, the present invention provides a suction switching valve in which a second cylinder is removably fitted into a bottomed first cylinder to which a suction pipe is connected, and a piston is inserted into this second cylinder. The piston is slidably inserted into the first cylinder, and the piston is elastically held by a biasing member that is removably attached to the first cylinder. Therefore, since the first cylinder can be made sufficiently large in diameter regardless of the diameter of the piston, it becomes easy to insert the brush from the first cylinder into the suction pipe connected to it. You can perform plush/glue work efficiently and reliably. Furthermore, by displacing the piston with respect to the second cylinder, it is possible to block the communication of the suction pipe, so that the inner circumferential surface of the first cylinder can be grooved like a conventional cylinder. There is no need to set up Therefore, the inside of the first cylinder can be easily cleaned.

[Brief explanation of the drawing]

1 to 4 show a first embodiment of the present invention, FIG. 1 is a schematic configuration diagram of an endoscope, FIG. 2 is a sectional view of a suction switching valve, and FIG. 3 is also in a suction state. FIG. 4 is an explanatory diagram when cleaning the suction pipe line, and FIGS. 5 to 7 are cross sections of the suction switching valve showing second to fourth embodiments of the present invention, respectively. It is a diagram. 8... Suction pipe line, 11... Suction switching valve, 13...
First cylinder, 20...Second cylinder, 23...
- Piston, 27... biasing member. Applicant's agent Patent attorney Takehiko Suzue 2 illustrations 5 illustrations 6N Off figures Patent office and official Shima 1) Haruki Tono1, Indication of the case Patent application No. 152688 1982, Name of the invention Endoscope Relationship between the suction device 3 and the case of the person making the amendment Patent applicant (037) Olympus Optical Industry Co., Ltd. 4, Agent 5, Voluntary amendment 7, Contents of the amendment (1) On page 5, line 18 of the specification: “ The phrase "on the upstream side" has been corrected to "on the downstream side." (2) Also on page 16, line 15, “I shown in Figure 5
The phrase "Embodiment of n2" is corrected to read "Second embodiment shown in FIG. 5."

Claims (3)

[Claims] (1) A first cylinder with a bottomed cylindrical shape to which a suction pipe is connected, a second cylinder detachably fitted into the first cylinder, and a second cylinder slidably fitted into the second cylinder. A suction valve for an endoscope, the valve having a suction switching valve consisting of a nine piston inserted into the first cylinder and a biasing member that is detachably attached to the first cylinder and elastically holds the piston. Device. (2) The endoscope suction device according to claim #I1, characterized in that the piston is provided eccentrically with respect to the first cylinder. (3) The suction device for an endoscope according to claim 1 or 2, characterized in that the second cylinder is attached to the urging member.