JPS5854925A - 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 conduit usually consists of a first chain that is upstream from the operation section of the endoscope to the light leakage section of the insertion section, and a first chain that is upstream from the operation section of the endoscope to the light leakage section of the insertion section.
It is divided into a second tube on the downstream side up to the connector connected to the end of the arm and monkey cord, and one end of these tubes located in the operation section is provided in the operation section and connected to the nine suction switching valve. has been done.

The suction can be performed by operating the suction switching valve.

In recent years, nosocomial infections caused by HB antigens have become common, and suction pipes that are contaminated with patient blood must not only be passed through disinfectant, but also be brushed with a brush. The need to do so has been advocated. Therefore, in order to make such brushing possible, the piston constituting the suction switching valve can be freely attached and detached from the cylinder. One idea is to insert brushes into the tubes on the upstream and downstream sides of the pipe for brushing. In other words, if the brush is inserted from the other end of the first tube which is opened at the distal end of the insertion section or from the other end of the crystal of the main channel 2 which is opened at the connector, dirt etc. in the suction channel may be removed. leaks from the suction switching valve to the operating section.

This operating section is provided with an angle knob and an eyepiece, so if these become contaminated, a great deal of effort is required to clean and disinfect them. Therefore, when brushing the suction conduit, it is best to insert brushes into the upstream and downstream channels from the cylinder of the suction switching valve, respectively, as described above.

However, in conventional endoscopes, at least one end of the tube on the upstream side or the downstream side of the suction conduit is connected to the peripheral wall of the cylinder. Therefore, since the tube connected to the peripheral wall of the cylinder opens perpendicularly to the axis of the cylinder, it is extremely difficult to insert the brush into the tube, and it is difficult to force the brush through the tube. When the brush is inserted, problems arise such as the brush being easily damaged.

This invention has been made based on the above circumstances, and its object is to connect one end of the upstream side and the downstream side of the suction pipe line to the bottom of the cylinder so that the upstream side of the suction pipe line can be connected to the bottom of the cylinder. To provide a suction device for an endoscope in which brushing can be performed by easily inserting brushes into the side and downstream sides, respectively, without causing immediate damage.

A first embodiment of the present invention will be described below with reference to FIGS. 1 to 4. 1 in FIG. 1 is an endoscope. This introspection! Reference numeral 11 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 the observation optical system 6 is optically connected to the eyepiece section 2 provided on the operation section 3.

On the other hand, a suction conduit 8 is formed in the endoscope @J. This suction conduit 8 has a first tube 9 on the upstream side from the insertion section 2 to the operation section 3, and a downstream side from the operation section 3 to the connector 4 via the 22-no-monkey cord 5. It is formed from a second soup 10. One end of the first channel 9 is connected to a suction switching valve 11VC provided in the operating section 3.
The other end is open to the distal end surface 2a of the insertion section 2. Also, one end of the second tip 110 is connected to the suction switching valve 11, and the other end is connected to a suction den (not shown) provided in the connector 4. It communicates with a base 41 which is connected to.

The suction switching valve 11 is constructed as shown in FIG. 2 and #I3. That is, a mounting hole 12 is formed in the wall 3a of the operating portion 3, and a first cylinder 13 is fitted into the mounting hole 12. The first cylinder 3 has a bottomed cylindrical shape with an open end projecting from the wall 3a to the outside of the operating part 3, and has a step in the middle of the outer peripheral wall that engages with the inner surface of the wall 3m. A portion 14 is formed, and a screw 15 is formed on the outer peripheral surface of one end. The first cylinder 13 is fixed to the wall 31 by an annular stopper 16 screwed onto the screw 15. The stopper body 16 has an upper flange 16a and a lower flange 16b, which has a larger diameter than the upper flange 16a.The cross section of the stopper body 16 has a hollow shape, and the lower flange 7') 16b is attached to the outer surface of the 61 body 3a. It is joined. (9) At the bottom of the first cylinder 13, 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. The second connecting pipe 18 consists of a large diameter part 18m and a small diameter part Jlb,
An abutting step portion 19 is formed at the boundary between these portions. One end of the first chip 9 is connected to the first connecting pipe 77, and one end of the second chip 10 is connected to the small diameter portion 18b of the second connecting pipe 18. has been done. That is, 1st. One end of the second chain 9, 100 is connected to the bottom of the first cylinder 13 so as to open. Furthermore, a second cylinder 20 is fitted into the first cylinder 10 . This second cylinder 20 has its outer circumferential surface hermetically joined to the inner circumferential surface of the first cylinder 13, and
A flange 2 having approximately the same diameter as the upper flange 16a of the stopper body 16 is formed at the upper end portion protruding from the first cylinder 13, and nine insertion holes 22 are formed in the center thereof and extend through the upper flange 16a in the axial direction.
is drilled.

The piston 23 is fitted into the insertion hole 72 so as to be vertically movable. This piston ZJK has a leak passage 24 extending over the entire length in the axial direction, and the leak passage 24 is formed in the middle part of the peripheral wall.
A communication hole 25 is provided that communicates with. Further, the piston 23 has a concave portion 26 having a rectangular cross-section at one end projecting outward from the second cylinder 20 . The piston 23 is elastically held by a biasing member 22 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 2r has a substantially skirt-like shape with open upper and lower surfaces, and has a round annular flange 28 projecting radially inward at the upper end, and a first annular collar 28 at the inner peripheral surface of the lower end. A groove 29 and a second annular groove 30 are formed. The biasing member 27 is the first biasing member 27. Second annular groove 29
．． 30 are removably fitted to the upper flange 16a of the stopper 16 and the flange 2 of the second cylinder 20, respectively, and the broken lag s28 is fitted to the recess 26 of the piston 23, thereby reducing the outer periphery of the piston 23. It is placed to cover the surface. Then, by removing the first annular groove 29 of the biasing member 27 from the upper flange 16% of the stopper 16, the piston 23 and the second cylinder 20 are moved together with the biasing member 27. It can be removed from cylinder J3 of No. 1.

Note that when the piston 23 is held by the biasing member 27 as shown in FIG. 2, the communication hole 25 formed in the piston 2S is located within the insertion hole 22 of the second cylinder 20 and the lower end is Since it is fitted into the second connecting pipe 18, the first tube 9 and the second tube 10 are disconnected from each other. Further, as shown in FIG. 3, when the piston 23 is pushed against the restoring force of the biasing member 27 until its lower end surface forms the second connecting pipe 18 and abuts the nine-step contact portion 19, the above-mentioned Since the communication hole 25 is exposed from the insertion hole 22 of the second cylinder 20, the first tape 9 and the second tube 10 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 47 (not shown) connected to the valve 1 is activated, the suction switching valve 11 is not operated in any way 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 tip 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 tip 9 and the second tip 10 communicate with each other through the communication hole 25 of the piston 23, so that the suction force is transferred to the first tip via the second tip 0. Acting on the reservoir 9, dirt and the like in the body cavity are 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, it is necessary to clean the suction pipe 8 after use. In that case, the fourth
A cleaning device 3 as shown in the figure is used. This cleaning device 3
The cover 33 is made of a brush 32 and a transparent elastic material such as flexible synthetic resin or rubber.

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 cover 33 has a gear shape with an open bottom surface, and has an upper flange 1 of the stopper 16 on the inner peripheral surface of the lower end.
6a is formed with a mounting groove 3# that is removably fitted therein, and a through hole 31 is bored at the top, and the wire 34 of the brush 32 is inserted into the through hole 31 in an almost airtight state. ing. The height of the cover 33 is such that when the cover 33 is attached to the stopper 16 as described later, the height of the space formed by the force t4-33 and the first cylinder 13 is equal to the height of the upper part of the brush 32. It is set to be longer than the length dimension of 35.

Cleaning of the suction line I using such a cleaning device 31 is performed as follows. First, after suctioning enough disinfectant into the suction pipe 8 using normal suction operation, and then draining the suction pipe 8 by suctioning air, the suction bong f
After removing the cylinder 20 of $2 from the first cylinder 13, insert the cover 33 into which the brush 32 is inserted into the opening of the first cylinder 13, that is, the flange 161 on the upper part of the stopper 16. The mounting groove 36 is fitted into the mounting groove 36 and the mounting groove 36 is fitted into the mounting groove 36. Once the force/4-33 is attached, the cover 33 is transparent, so while looking inside, first insert the brush 32 from the first connecting pipe 17 to the first Q-button side, and then insert the upper part 35. After protruding from the distal end surface 2a of the insertion section 2, place the distal end of the insertion section 2 into the disinfectant solution. Here, suction pump again! is activated, the brush 32 is pulled while sucking the disinfectant solution, and the first cheapp 9 is disinfected while being brushed. At this time, the force/?
-33 is attached, and the wire 34 of the brush 32 and the through hole 31 of the cover 336 are almost airtight, so disinfectant, dirt, etc. will not be scattered outside.

And transparent force ) 4 33 through the first cylinder!
Check the color of the disinfectant flowing through the first tube 9.
Brush inside.

After brushing inside the first tip 9, move the upper part s5 of the brush 32 to the first tip 9.
Pull it out @2 chi.

- Put it in Bu 10. At this time, since 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 force z4-JJ, the cover 33
The upper part 85 of the brush 32 can be transferred from the first tray 9 to the second tray 10 without removing it, which is sanitary. In this way, the brush 32 is transferred to the second tip 1. - If you pass this second chip to block 10, pass this second chip to block 10.
Brush while flushing the disinfectant as in Step 9.

When brushing the second tube 1o, if the base 4a of the connector 4 and the suction 4yf are connected with a transparent hose, when the brush S1 is passed through the second tube 10, the upper part 35 It is possible to check whether the center has come out from the cap 41, and also to check the color of the disinfectant flowing through the second tip 10.

That is, according to the suction switching valve 1 configured as described above, the first... Since one end of the second chade 9, 100 is connected to open at the bottom of the first cylinder no. 3, when inserting the brush 32 from the first cylinder 13 into each chave 9, 10, It can be easily inserted without bending the part.

Note that when cleaning the suction conduit 8 without using the cover 33, it is sufficient to stop the suction I-ing and perform only brushing without flushing the disinfectant.

5 to 8 show second to fifth embodiments of the present invention, and each of these embodiments differs from the first embodiment in the structure of the suction switching valve 1.

That is, the second embodiment shown in FIG.
The insertion hole 22 of the second cylinder 20, into which the cylinder 20 is inserted, is bored at an eccentric position of the second cylinder 20. Then, an annular flange 28 for holding the piston 23 formed on the biasing member 2r is made eccentric so as to correspond to the insertion hole 22, and a 20th connecting pipe 18 to which one end of the second tube 10 is connected Also the piston 2 at the bottom of the first cylinder 13
3 and the corresponding eccentric position. Further, a first connecting pipe 11 to which one end of the first tube 9 is connected was connected to the bottom of the first cylinder ISO at an angle with respect to the axis of the first cylinder 13.

According to such a configuration, the second connecting pipe 18 is eccentrically connected to the bottom of the first cylinder 13. The brush 32 can be easily inserted from the first connecting pipe 17 into the first tip 9, and furthermore, the Insertion of the brush 32 is also facilitated by the fact that the connecting pipe 11 is inclined.

In the third embodiment shown in FIG. 6, one tarino, that is, the cylinder 38, has an insertion hole 22 in the center thereof, and a brush hole 39 whose axis is parallel to the insertion hole 22. It is perforated. At the bottom of the cylinder 38,
A first connecting tube 11 to which a first tube 9 communicating with the brush hole 39 is connected, and a second connecting tube 18 connected to a second tube 10 communicating with the insertion hole 22 are provided. . In addition, the nine piston 23 inserted into the insertion hole 22 is
A first flange 40 having approximately the same diameter as the inner diameter of the cylinder 38 is provided in the middle, and a second flj 41 having a smaller diameter than the first flange 40 is provided at the upper end. The biasing member 27 that elastically holds the piston 2S has a substantially hemispherical shape, and has an upper flange 1 of the stopper J6 on the inner peripheral surface of the lower end.
The first annular groove 29 and the cylinder 38 are provided with a protrusion 42 that protrudes radially inward from the upper end opening surface of the cylinder 38 and the first annular groove 29 that is removably fitted into the cylinder 6&. Further, a retaining hole 43 is bored at the top of the biasing member 27 . And piston 23
The second flange 41 is engaged with the engagement hole 43 to be held elastically, and the peripheral upper surface of the first flange 40, which is fitted into the cylinder 38, is engaged with the protrusion 41. It is provided so that it cannot be pulled out from the cylinder j8.

Furthermore, nine positioning grooves 44 are formed in the lower end surface of the male stone 23 and open, and the tip of a positioning pin 45 screwed in the radial direction of the cylinder 38 is engaged with this positioning groove 44. The piston 23 is positioned in the rotational direction. Further, in the cylinder 38, a horizontal hole 4σ is bored in a wall portion that separates the insertion hole 22 and the brush hole 39 from each other.

Then, the first collar 40 of the piston 23 is connected to the cylinder 3.
When the piston 23 is pushed in until it contacts the stepped portion 38e formed in the piston 8, the friend passage hole 25 provided in the piston 23 and the horizontal hole 46 are opened.
are facing each other, so the first chain 9 and the second chain 1
0 is communicated with.

Even in such a configuration, the first
the second tube 9 and the second tube 1 through the insertion hole 22.
0 and 9 respectively by inserting the brush 32 into them.
, 10 can be singed.

The suction switching valve 1 of the fourth embodiment shown in FIG. 7 is formed by one cylinder 38 like the third embodiment, but the configuration of each part is slightly different. That is, in the cylinder 38, the main body 38& and the cylindrical body 31b inserted into the eccentric position of the main body 38a are not fixed together, and the insertion hole 22 through which the piston 23 is inserted is formed by the cylindrical body 5ttb.
is formed, and the lower end protruding from the bottom, which is the lower end surface of the main body 38&, also serves as the first connecting pipe 17 to which the first cheap 9 is connected. Note that the remaining space inside the main body 38a serves as a brush hole 39. Furthermore, a second connecting pipe 7#1 was connected to the bottom of the main body 38m, and a second connecting pipe 7#1 was connected to the axis of the main body 38m.

It is connected at an angle. The piston 23 has a cylindrical shape with an upper end closed and a lower end open, and this internal space serves as a communication path 47.

That is, the piston 23 is not provided with a leak path 24 that opens directly to the atmosphere. Furthermore, a positioning groove 44 is formed along the axial direction in the upper part of the peripheral wall of the male stone 23,
A positioning pin 45 provided on the peripheral wall of the cylindrical body 5ttb engages with this ζ, and positions the piston 23 in the rotational direction.

Further, the stopper body 16 that attaches the cylinder 38 to the nine mounting hole 12 bored in the wall 3a of the operating section 3 is provided with the cylinder 38.
A screw hole 48 into which 8 is screwed is eccentrically bored corresponding to the cylindrical body s8b.

Therefore, the biasing member 2r provided by fitting the first annular groove z9 formed in the inner circumferential surface of the lower end into the upper flange 16m of the stopper 16 is formed as a rotating body symmetrical with respect to this axis. There is. This biasing member 21 has a concave groove 49 carved in the inner circumferential surface of a retaining hole 4S bored at the top, and a nine flange 50 provided at the upper end of the piston 23 in the D concave 11449 is airtight. Furthermore, a suction hole 52 is formed in the circumferential wall of the biasing member 21, which is bent inward, and one wall 21m has a suction hole 52. 23 is elastically held, the communication hole 25 formed in the piston 23 and the cylinder 3
Since the horizontal hole 46 formed in the cylinder body ssb of No. 8 is blocked, the suction hole 52 formed in the biasing member 21 through the brush hole 39 is caused by the suction force generated in the second chain 10. Atmospheric air is sucked in from the air. Also, when the piston 23 is pushed in, the first tip 9 is inserted through the communication hole 25 and the horizontal hole 46.
and the second gourd 10 are communicated with each other, and the biasing member 27 is compressed, so that one wall 27b of the constriction 51 comes into close contact with the other wall 27m, and the suction hole 52 is sealed. Therefore, the suction force generated in the second chamber 10 acts on the first chamber 1911, thereby suctioning dirt and the like in the body cavity.

Therefore, according to such a configuration, the first. Insert the lashes 32 into the second tubes II and 10 and connect these chips 9 and 1° to the tubes 2 and 10. In addition, since the insertion hole 22 is eccentric and the second connecting pipe 18 is tilted, the first connecting pipe 18 can be connected to the first connecting pipe as in the second embodiment shown in FIG. The brush 32 can be easily inserted into the second tip 9-10.

FIG. 8 shows a fifth practical example of this invention, and the suction switching valve 1) of this example is a combination of the third embodiment shown in FIG. 6 and the fourth embodiment shown in FIG. The structure is as follows. That is, the cylinder j8 is provided with an insertion hole 22 at this eccentric position, and the second connection pipe 18 to which the second tube IO is connected is connected to the lower end of the insertion hole 22, that is, to the bottom of the cylinder 38.
The cylinder 38 is provided with a brush hole S9 which is inclined with respect to this axis and has one end communicating with the insertion hole 22 and the other end opening at the bottom of the cylinder 38. The chip 9 was directly connected.

The piston 23 inserted into the insertion hole 22 has a cylindrical shape with an upper end closed and a lower end open, and this internal space serves as a communication passage 47. That is, the piston 23
is not provided with a leak path 24 that opens directly to the atmosphere. Further, the piston 23 is formed with an open positioning groove 44 on its lower end surface, and the tip of the positioning #$45 provided in the radial direction of the cylinder 38 is engaged with the positioning groove 44, so that the piston 23 The rotational direction is determined. Further, a shaft body 53 is provided at the upper end of the piston 23 and is eccentric with respect to the piston 23 and whose axis is aligned with the cylinder 38 . A first lagoon 54 is formed at the lower end of this shaft body 53, and a second collar 55 is formed at the upper end. The biasing member 27 that elastically holds the piston 23 has an uneven peripheral wall, and a suction hole 52 is bored in the convex portion of the peripheral wall.
An engagement groove 51 into which the second collar 55 of the shaft body 53 fits is formed at the top. Furthermore, a protrusion 42 that engages with the upper surface of the biasing member 27 is provided.

When the piston 23 is held by the biasing member 27, a communication hole 25 formed in the peripheral wall of the piston 23 protrudes from the upper end surface of the cylinder 38, and the communication hole 25 and the biasing member 21 are connected to each other. Drilled suction hole 5
The second brush hole 39 is communicated with the atmosphere through the piston 23, and the brush hole 39 is closed by a portion of the piston 23 located within the insertion hole 22. In addition, cylinder 3
A wall 59 that faces the communication hole 25 is protruded from the upper end surface of the communication hole 8, and this wall 59 prevents dirt and the like from the communication path 47 from being ejected from the suction hole 52 through the communication hole 25. are doing. Also, the piston 23 is pushed against the restoring force of the biasing member 27 by the first collar 5 which is attached to the lower end of the shaft body 53.
4 until it comes into contact with the upper end surface of the cylinder 38,
Since the communication hole 25 faces the brush hole 39, the first tube 9 and the second tube 10 are formed in the piston 23. Even in such a configuration, if the piston 23 is removed together with the biasing member 27 from the cylinder 38, By inserting the brush 32 into the first tube 9 and the second tube 10, the tubes 9 and 10 can be cleaned.

As described above, in this invention, one end of the upstream side and the downstream side of the suction pipe are connected to the bottom of the cylinder of the suction switching valve, so that when brushing the suction pipe, the suction pipe is The brush can be easily inserted into the upstream and downstream sides of the brush without damaging it. Therefore, the suction pipe can be brushed reliably and efficiently.

[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 8 are cross-sectional views of the suction switching valve showing second to fifth embodiments of the present invention, respectively. FIG. 8... Suction pipe line, 9... First cheep (upstream side)
DESCRIPTION OF SYMBOLS 10... Second tube (downstream side), 1... Suction switching valve, 13... First cylinder, 23... Piston, 38... Cylinder. Applicant's agent Patent attorney Takehiko Suzue Figure 5 Figure 6 Figure 7

Claims (1)

[Scope of claims] A suction device for an endoscope, characterized in that one end of the upstream side and the downstream side of the suction pipe are connected to the bottom of the cylinder. (2) The endoscope according to claim 1, wherein one end of the upstream side and the downstream side of the suction pipe are connected to the bottom of the cylinder while being offset from the central axis of the cylinder. Suction device. (3) At least one of the upstream and downstream ends of the suction pipe is inclined with respect to the central axis of the cylinder and connected to the bottom of the cylinder. The suction device for an endoscope according to item 1 or 2. (4) The suction pipe has one end inclined with respect to the central axis of the cylinder and is connected to the bottom of the cylinder, the other end of which is connected to the bottom of the cylinder. The endoscope suction device according to claim 3, wherein the endoscope suction device is located on the upstream side leading to the distal end of the insertion section.