JPH07194520A - Endoscope duct switching controller - Google Patents

Abstract

PURPOSE:To provide an endoscope duct switching controller that can reduce as much of damage to a positioning means for positioning a piston with respect to a cylinder as possible and has good washability. CONSTITUTION:In this endoscope duct switching controller having a cylinder 54 with a plurality of connections to which the plurality of ducts of an endoscope are connected and a piston 41 forming a passage serving to communicate the connections with one another, and controlling the communication between the connections by fitting the piston 41 into the cylinder 54, positioning means 58, 59, 60 for positioning the piston 41 with respect to the cylinder 54 are provided integrally with the cylinder 54 and the piston 41. The means are provided on portions other than the respective sliding surfaces of the piston 41 and the cylinder 54.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope conduit switching control device for controlling switching of an endoscope conduit.

[0002]

2. Description of the Related Art Conventionally, a cylinder having a plurality of connection ports to which a plurality of conduits of an endoscope are respectively connected, and a piston forming a passage for communicating the connection ports are provided.
There is known an endoscope conduit switching control device that inserts the piston into the cylinder to control the communication state between the connection ports. As such a pipeline switching control device,
For example, there is a suction control device attached to an endoscope.

In the suction control device, for example, as shown in FIG. 26 (a), a pin 202 is provided inside the cylinder 200 as a separate body, and a groove portion 204 is provided also on the piston 201 side so that the pin 202 is provided. By engaging with the groove portion 204, the rotation of the piston 201 is regulated and positioned (JP-A-59-49732).

Further, as a means for restricting the rotation of the piston 201 and positioning it as described above, as shown in FIG. 26 (b), a holder 20 for holding the piston 201 is provided.
There is also a method of screwing the threaded portion 206 provided on No. 5 and the threaded portion 207 provided on the outer peripheral surface of the cylinder 200 (Japanese Utility Model Laid-Open No. 2-121002).

Further, as shown in FIG. 26 (c), by utilizing the pin 202 and the locking groove 208, the rotation of the piston 201 is regulated and positioned, and the piston can be easily attached and detached. A mechanism has been devised (Japanese Utility Model Publication No. 1-150904). In this case, the guide member 209 provided with the locking groove 208 is provided so as to be connected to the cylinder 200 mounted in the operation portion 210 of the endoscope, and further projects from the operation portion 210.

[0006]

However, as shown in FIG.
In the configuration shown in (a) of (a), since the pin 202 is provided on the sliding surface between the piston 201 and the cylinder 200, when cleaning the inside of the cylinder 200, the pin 202
Is an obstacle to cleaning.

Further, in the structure shown in FIG. 26B, when mounting the piston 201, it is necessary to screw the holding member 205 into the operating portion 210 side, so that the piston 201 is mounted. Takes time.

Further, in the structure shown in FIG. 26 (c), since the cylinder 200 is fixed in the operation portion 210 of the endoscope, it takes time to clean the inside of the cylinder 200. Further, a guide member 209 having a locking groove 208
Is a cylinder 2 mounted inside the operation unit 210 of the endoscope.
00, the guide member 209 projects from the endoscope operation section 210 when the piston 201 is removed. Therefore, when cleaning the inside of the cylinder 200, the guide member 209 may be bent or damaged.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to prevent damage to a positioning means for positioning a piston with respect to a cylinder as much as possible and to have good cleaning performance. An object is to provide a conduit switching control device for an endoscope.

[0010]

In order to solve the above problems, the present invention provides a cylinder having a plurality of connection ports to which a plurality of conduits of an endoscope are respectively connected, and the connection ports of the same. A piston forming a passage for communicating, wherein the piston is inserted into the cylinder to control the communication state of the connection ports, and the piston is arranged in the cylinder. Positioning means for positioning with respect to each other are provided integrally with the cylinder and the piston, and are provided at a portion other than the sliding surface between the piston and the cylinder.

Therefore, in the above structure, the projection is removed from the piston sliding surface of the conduit switching control device, and the cleaning property is improved.

Here, the positioning means is a means for restricting or setting the rotational position of the piston and the cylinder, or for restricting or setting the axial position or sliding range of the piston and the cylinder. Say.

[0013]

EXAMPLES Examples of the present invention will be described below. 1 to 20 show a first embodiment of the present invention. FIG. 1 shows an overall view of the endoscope in this embodiment. The endoscope includes an insertion section 1, an operation section 2, and a universal cord 3. The insertion portion 1 is covered with a resin such as polyurethane, and a curved portion 4 covered with a soft elastic body is provided at the tip portion. A hard tip portion 5 is provided at the tip of the bending portion 4, and an observation optical system, an image pickup device, an illumination optical system, an air / water feeding nozzle, which are not shown in the figure, are provided.
A forceps opening and the like are provided.

The operation unit 2 has a suction control device 6 used for suction, an air / water supply valve 7 operated for air / water supply, and a video signal output from the image pickup device. A remote switch 8 is attached.
Further, a hard resin angle knob 9 is attached to the operation portion 2, and the bending portion 4 can be bent vertically and horizontally by operating these. Further, a FE lever 10 made of a hard resin, which is used when the bending portion 4 is kept in the bending fixed state or released from the bending fixed state, is also attached.

The universal cord 3 is covered with a resin such as polyurethane, and a connector 11 made of hard resin is attached to the tip of the universal cord 3. Connector 11
Is a S-shaped wire 12 for returning the high frequency leakage current to the cauterization power source, a metal water supply mouthpiece 14 for supplying water by connecting to a water supply tank (not shown), and a metal air supply pipe for performing air supply. 15, electrical contact 16, end 1 of light guide
7 is provided, and by connecting this portion to the connector receiver 19 of the light source device 18, the illumination light is emitted from the illumination optical system of the hard tip portion. Further, an electric connector portion 20 is provided on the side surface of the connector 11, and a connection cord 21 is connected to this portion to connect with a video processor 22 so that an electric signal output from the image pickup device is displayed on a monitor 23. It can be displayed as an image.

FIG. 2 is a side view of the operation section 2 of the endoscope, and FIG. 3 is a top view of the operation section. A grip 24 made of a hard resin such as polysulfone for holding the endoscope is provided below the operation unit 2 of the endoscope. A forceps port 2 for inserting a treatment tool such as forceps through the grip 24.
6 is provided. A forceps plug 27 made of an elastic material such as silicon rubber is attached to the forceps port 26.

A first suction tube 28 made of an elastic material such as vinyl chloride or silicon rubber is attached to the forceps plug 27 through a conduit branch member 29. The first suction tube 28 is attached to the grip 2 as shown in FIG.
4 is fitted and fixed in the tube fixing groove portion 30 provided in 4, and its end portion is connected to the inlet pipe line 56 provided in the suction control device 6. Further, the suction control device 6 is provided with an outlet pipe 55, to which the second suction tube 33 is connected via an elbow member 70. Second
The suction tube 33 is connected to a third suction tube 36 connected to a suction pump (not shown) via a suction tube fixing member 35 attached to the universal cord 3.

FIG. 4A shows a piston 41 attached to the suction control device 6 used in this embodiment. The piston 41 is made of a hard resin such as polysulfone, modified PPO, polyester, polycarbonate, polyethylene, or fluororesin, or a metal such as stainless steel, brass, or aluminum, and has a tubular portion 42 that is a tubular body having a cylindrical cross-section. The push button portion 43 is a tubular body having a diameter larger than that of the tubular portion 42. The tubular portion 42 and the push button portion 43 are provided on a concentric shaft and integrally formed. From the lower end of the push button 43, a rotation preventing column 48 that extends to prevent rotation of the piston is provided. Inside the root of the rotation prevention pillar 48,
A pin 49 that serves as a guide pin for the piston 41 when the piston 41 moves is provided. As shown in FIG. 4B, the pin 49 has a columnar shape with a circular cross-sectional shape. The cross-sectional shape of the pin 49 is not limited to the circular cross-sectional shape and may be, for example, a square, a rectangle, or an ellipse.

FIG. 5 shows a vertical sectional view of the piston 41. Inside the tubular portion 42, there is a tapered conduit 44 which is a tapered conduit, an upper opening 45 is at the upper end side surface of the tapered conduit, a lower end opening 46 is at the lower end, and a lower end is at the lower end side. Side openings 47 are provided respectively.

In this embodiment, the upper side opening 45 and the lower side opening 46 are located in the horizontal plane as shown in FIG. 5 (b).
It is provided at a position forming an angle of 25 degrees. Further, a first chamfered portion 53 is provided on the lower end of the tubular portion 42 over the entire circumference. A rib 50 is provided inside the push button portion. FIG. 7 shows a cross sectional view of the piston 41. In this embodiment, as shown in FIG. 7, the ribs 50 are provided at three locations on the circumference at equal intervals, but the ribs 50 are not limited to three locations.
More or less than this may be provided.

Further, as shown in FIG. 6, the upper surface 5 of the button portion is
1, a plurality of openings 52 are provided. Opening 52
The ribs 50 and the ribs 50 are provided at positions on the plane that do not interfere with each other. At a position facing the upper opening 45 of the push button portion 43, a button cutout portion 90 is provided by cutting out the push button portion 43 so that the upper opening portion 45 can be seen from the outside.
Is provided.

FIGS. 8A and 8B show a cylinder 54 attached to the suction control device 6 used in this embodiment. Cylinder 54 is polysulfone, Noryl, modified P
Hard resin such as PO, polyester, polycarbonate, polyethylene, fluororesin, or stainless steel,
It is formed from a metal such as brass or aluminum. FIG. 8A is a view of the cylinder 54 as seen from above, and FIG.
(B) shows a view of the cylinder 54 from the side. The cylinder 54 is provided with a second tubular portion 57, and the side surface of the second tubular portion 57 is provided with an inlet pipe line 56 and an outlet pipe line 55. Inlet pipe 56 and outlet pipe 5
5 forms an angle of 125 degrees on the plane as shown in FIG. In this embodiment, this angle is 125 degrees, but other angles may be used. Also, FIG.
As shown in (b), the inlet pipe line 56 and the outlet pipe line 55 are provided at vertically displaced positions.

Further, on the side surface of the second tubular portion, the pin introduction groove portion 5 is provided in a direction parallel to the center line 254 of the second tubular portion 57.
8 and a pin insertion groove portion 59 are provided. The pin introduction groove portion 58 and the pin insertion groove portion 59 are communicated with each other by the transition groove portion 60. In addition, the upper opening end 61 of the pin introduction groove portion 58
The second chamfered portion 62 is provided in the.

The inlet pipe 56 is provided with a syringe taper-shaped portion 63 having a syringe taper-shaped outer shape, and the syringe taper-shaped portion 63 is provided between the syringe taper-shaped portion 63 and the second tubular portion 57. A flange 64 having a width larger than the diameter is provided. As shown in FIG. 9, a cutout portion 65 is provided on the side surface of the flange 64.

Spring locking means 6 is provided at the upper end of the cylinder 54.
6 are provided at four locations at equal intervals of 90 degrees. In this embodiment, there are four spring locking means 66, but this may be four or more or four or less.
Further, at least one of the plurality of spring locking means 66 provided is provided with a spring end fixing groove 67 as shown in FIG. The spring fixing groove 67 has a taper shape whose groove width changes in the circumferential direction. Also, the spring fixing groove 6
The spring locking means 66 not provided with 7 has a triangular cross section as shown in FIG. A plurality of positioning ribs 68 are provided at intervals of 90 degrees on the lower outer circumference of the second tubular portion 57. In this embodiment, the positioning ribs 68 are provided at three positions at intervals of 90 degrees, but the number of the positioning ribs 68 and the mounting interval may be at three positions other than 90 degrees.

11 (a) and 11 (b), the elbow member 7 attached to the suction control device 6 used in this embodiment.
Indicates 0. The elbow member 70 is provided therein with a tapered conduit portion 72 having a second syringe tapered portion 99 and a straight conduit portion 73 orthogonal to the tapered conduit portion. Further, the second ribs 69 are provided at three locations on the outer circumference of the tapered conduit portion 72 at intervals of 90 degrees. Further taper line 72
Is provided with parallel flat surface portions 74 which are two surfaces parallel to each other by cutting out the outer periphery thereof. The outer shape of the end portion of the direct passage portion 73 is a tapered portion 75 that is processed into a tapered shape for attaching the suction tube.

FIG. 12A shows a top view of the operating section 2 used in this embodiment, and FIG. 12B shows a side view of the operating section 2. A fixing hole portion 76 for attaching the suction control device 6 is provided between the air / water feeding valve 7 and the remote switch 8 provided in the operation unit 2. Fixing hole 7
Reference numeral 6 denotes a side wall portion 77 and a side wall portion 77 which are parallel to each other.
The curved wall surface 78 is a surface having a semicircular horizontal cross-sectional shape that connects the two. Further, a side opening 80 is provided at a position facing the curved wall surface 78, the side opening 80 opening to a side surface 79 of the operating portion, which is a side surface of the operating portion 2, and an upper opening 81 is provided at the upper surface of the operating portion. Side surface 79 of the operating portion of the side wall portion 77
A third rib 82 protruding from the side wall portion is provided on the side. The fixing hole portion 76 is also provided in a direction orthogonal to the long axis direction of the operation portion 2.

FIG. 13 shows a piston sliding spring 83 attached to the suction control device 6 used in this embodiment.
End turns 84 are provided at both ends of the spring 83, and the tip end of the end turn 84 is a mounting taper portion 85 that is tapered.

FIG. 14 shows a method of assembling the suction control device 6 used in this embodiment and a method of attaching the suction control device 6 to the operating portion 2. First, the cylinder 54 has a spring 83
Assemble. As shown in FIG. 16, the spring end fixing groove 67, which is a tapered groove provided in one of the spring locking means 66 on the upper portion of the cylinder 54, has a taper portion 85 of the spring 83.
After they are fitted together, they are adhesively fixed with an adhesive material. Since the spring 83 is adhesively fixed, the spring 83 does not come off from the cylinder 54 when the suction control device 6 is disassembled and cleaned.

Next, the piston 41 is inserted into the cylinder 54. At this time, the mounting position is adjusted while rotating the piston 41 with respect to the cylinder 54 so that the pin 49 provided inside the push button portion 43 is engaged with the pin introduction groove portion 58 provided on the outer periphery of the cylinder 54. To do.
Since the pin 49 is provided at the base of the anti-rotation column 45, the pin 45 can be engaged with the pin introduction groove 58 by using the anti-rotation column 45 as a guide. When the piston 41 is pushed in after the pin 49 is engaged with the pin introduction portion 58 as shown in FIG. 17A, the pin 49 reaches the right end portion of the transition groove portion 60. Here, as shown in FIG.
When pin 1 is rotated counterclockwise in the figure, pin 49 reaches pin insertion groove 59. Therefore, when the external force applied to the pin is eliminated, the pin 49 engages with the pin insertion groove 59 by the reaction force of the spring 83. As a result, the piston 41 is attached at a predetermined position, and as shown in FIG. 17C, the pin 49 moves vertically inside the pin insertion groove 59 during actual use. The length of the pin insertion groove 59 is the piston 41.
Has a length equal to or longer than the distance that it moves vertically inside the cylinder. The lower end of the pin insertion groove 59 is an open end 89 having no wall in this embodiment. By providing the open end 89, the washability of the pin insertion groove portion 59 is improved. Also, when the piston 41 is pushed in, as shown in FIG.
The lower end of No. 3 and the flange 64 are in contact with each other to regulate the downward sliding of the piston.

By the way, as shown in FIG. 18, the downward sliding of the piston is regulated by providing a wall portion 100 at the lower end of the pin insertion groove portion 59 and abutting the pin 49 on this portion to slide the piston. May be regulated. At this time, pin 4
9 may hit the wall portion 100 to scratch the wall portion 100, but since the rotation prevention column 48 covers this portion, the scratch is not noticeable in appearance.

Next, a method of attaching the suction control device 6 to the operation portion main body will be described. Cylinder 5 of suction control device 6 with piston 41 and spring 83 assembled in cylinder 54
4 is fitted in the fixing hole portion 76 provided in the operation portion main body.
The width of the fixing hole portion 76 is larger than the outer diameter of the second tubular portion 57.
Although it is large, since the second rib 68 is between the fixing hole portion 76 and the cylinder 54, the cylinder 54 does not rattle inside the fixing hole portion 76. Also, the entrance pipeline 5
Since the outer diameter of 6 is smaller than that of the fixed hole narrow portion 91, it is accommodated in the fixed hole narrow portion 91. At this time, the flange 64 is provided at a position that does not fit into the narrow portion of the fixing hole, and the cylinder 54
When trying to rotate inside the fixing hole 76, the flange 6
Since 4 contacts the side wall 77, rotation can be prevented. In this state, as shown in FIG. 15, the rotation preventing column 48 is provided with the side wall portion 77 of the fixing hole portion 76, the flange 64, and the outlet pipe line 5.
5 and is accommodated in the space surrounded by the second tubular portion 57.

Next, the second syringe tapered portion 99 provided on the inner surface of the elbow member 70 and the syringe tapered portion 63 provided on the outlet conduit 55 are fitted together. Since the syringe tapers are fitted to each other, this portion will not come off during normal use. Further, at this time, as shown in FIG. 20, the second rib 69 and the third rib 82 come into contact with the parallel plane portion 74 and the third rib 82, respectively, so that the elbow member 70 is inserted into the fixing hole portion 76. Does not rotate. At the same time, even if an upward force acts on the cylinder 54 in FIG. 16, the second rib 69 and the third rib 82 come into contact with each other, so that the cylinder 54 does not come off in the upward direction.

As described above, when the suction control device 6 is fixed to the operation portion 2, even if the piston 41 is pushed in, the piston 41 is rotated by the pin 49 that moves up and down in the pin insertion groove portion 59. Is prevented. Further, when the pin 49 approaches the transition groove portion 60, even if the force for rotating the piston 41 acts and the pin 49 tries to move to the transition groove portion, the rotation preventing column 48 is fixed to the fixing hole portion 76 as shown in FIG. Since it is surrounded by the side wall portion 77, the flange 64, the outlet pipe 55, and the second tubular portion 57, it does not rotate.

Although the present embodiment describes the suction control device 6, the present invention is not limited to the suction control device, but is applied to other conduit switching control devices such as the air / water supply valve 7. It is also possible.

Thus, the suction control device 6 of this embodiment
Since the rotation preventing means 49, 58, 59, 60 of the piston 41 attached thereto are provided outside the cylinder 54, there is no protrusion inside the cylinder 54. That is,
The rotation preventing means is not provided on the sliding surface between the piston 41 and the cylinder 54. Therefore, the cleanability of the cylinder 54 is improved. In addition, the cylinder 54 and the piston 41
Is detachable from the operating portion 2, so that the cylinder 5
The inside of 4 is easy to clean.

Further, in this embodiment, since at least a part of the spring 83 for operating the piston 41 of the suction control device is fixed to the piston 41 or the cylinder 54 constituting the suction control device 6 in a non-detachable state, The spring 83 does not come off from the cylinder 54 when the suction control device 6 is disassembled and cleaned. That is, it is possible to prevent the spring 83 from being lost.

Further, in the present embodiment, since the button cutout portion 90 is provided by removing the portion of the push button portion 43 provided on the piston 41 that covers the upper opening portion 45, a cleaning tool or the like is provided in the upper opening portion 45. It can be easily inserted. Therefore, the cleaning property of the piston 41 is improved, and as a result, the cleaning property of the entire suction control device 6 can be improved.

21 to 25 show a second embodiment of the present invention. In this embodiment, the shape of the end portion of the spring 83, the method of fixing the spring, and the piston 4 are used.
The rest of the configuration is the same as that of the first embodiment except for the locking means between 1 and the cylinder 54.

In the present embodiment, as shown in FIG. 21B, the second pin introduction groove 158, the second pin insertion groove 159, and the second transition groove 160 are inside the push button portion 43 of the piston 41. It is provided in. A lower opening end 16 that opens downward is provided at the lower end of the second pin introduction groove 158.
4 are provided. Furthermore, the lower open end 164 has a third
The chamfered portion 163 is provided. The second pin insertion groove 159 does not have the open end shown in the first embodiment.

Also, as shown in FIG. 22, the second pin 16
1 is provided on the outer surface of the cylinder.

FIG. 23 shows the second spring 9 used in this embodiment.
3 is shown. The second spring 93 is provided at both ends of the second spring 93.
Winding end 94 formed by winding a spring on the side opposite to the winding direction
Is provided. A transition portion 95 is provided between the winding end portion 94 and the second spring 93. As shown in FIG. 24, the transition portion 95 is fixed to the transition portion fixing groove 96 which is a groove provided in the spring locking means 66, and the winding end portion 94 is engaged with the spring locking means 66 to lock the spring. Fix it.

As described above, in the present embodiment, the winding end portion 94 is provided at the spring end portion, and this portion is provided by the spring locking means 6.
Since the spring 93 is fixed by engaging with 6, it is not necessary to bond and fix the spring end portion as shown in the first embodiment, and the assemblability of the suction control device 6 is improved.

[0044]

As described above, in the endoscope line switching control device of the present invention, the piston positioning means attached to the device is provided in a portion other than the sliding surface between the piston and the cylinder, and Since the cylinder and the piston are provided integrally with each other, the cleanability of the cylinder is improved and damage to the positioning means can be prevented.

Further, since the positioning means is provided integrally with each of the cylinder and the piston, the cylinder and the piston are detachably attached from the endoscope side so that the positioning means can be used for cleaning the endoscope. It does not get in the way and improves the cleaning performance.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an endoscope.

FIG. 2A is a side view of an operation portion of an endoscope, and FIG. 2B is a sectional view taken along line AA of FIG.

FIG. 3 is a top view of an endoscope operation unit.

4A is a side view of a piston attached to the suction control device according to the first embodiment, and FIG. 4B is a view in the direction B of FIG.

5A is a cross-sectional view of the piston of FIG. 4, FIG. 5B is a view in the D direction of FIG. 5A, and FIG. 5C is a view in the C direction of FIG.

FIG. 6 is a top view of the piston of FIG.

7 is a sectional view taken along the line EE of FIG.

FIG. 8A is a top view of a cylinder attached to the suction control device according to the first embodiment, and FIG. 8B is a side view of the cylinder shown in FIG.

FIG. 9 is a view taken in the direction of the arrow F in FIG.

10 is a side view of the upper end of the cylinder of FIG.

FIG. 11 is an elbow member attached to the suction control device according to the first embodiment, where (a) is a view from the direction of the arrow G in (b), (b) is a side view of the elbow member, and (c) is. It is a sectional side view of an elbow member.

FIG. 12A is a top view of a suction control device mounting portion of the endoscope operating portion of the first embodiment, and FIG. 12B is a side view.

FIG. 13 is a schematic view of a piston sliding spring attached to the suction control device according to the first embodiment.

FIG. 14 is a view showing an assembling method of the suction control device of the first embodiment and a mounting method of the suction control device to the operation portion.

FIG. 15 is a transverse cross-sectional view when the piston is mounted on the cylinder.

FIG. 16 is a diagram showing a state in which a spring is fixed to a cylinder.

FIG. 17 is a diagram showing a state in which the pin is moved in the groove.

FIG. 18 is a diagram showing a modified example of the groove configuration of FIG.

FIG. 19 is a side sectional view of the suction control device in an assembled state.

FIG. 20 is a cross-sectional view of a state in which the suction control device is mounted in the mounting portion of the operation portion.

FIG. 21 (a) is a side view of a piston of a suction control device according to a second embodiment of the present invention, and FIG. 21 (b) is a view in the direction H of FIG.

FIG. 22 is a perspective view of a cylinder.

FIG. 23 is a schematic view showing another configuration of the spring mounted on the cylinder.

FIG. 24 is a state diagram showing a state in which a spring is attached to the cylinder.

FIG. 25 is a diagram showing a state in which the pin is moved in the groove.

FIG. 26 is a view showing a conventional structure of a suction control device.

[Explanation of symbols]

6 ... Suction control device (endoscope channel switching control device), 4
1 ... Cylinder, 49 ... Pin (positioning means), 54 ... Cylinder, 58 ... Pin introduction groove (positioning means), 59 ... Pin insertion groove part (positioning means), 60 ... Transition groove part (positioning means).

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[Procedure amendment]

[Submission date] May 26, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

FIG. 4A shows a piston 41 attached to the suction control device 6 used in this embodiment. The piston 41 is made of a hard resin such as polysulfone, modified PPO, polyester, polycarbonate, polyethylene, or fluororesin, or a metal such as stainless steel, brass, or aluminum, and has a tubular portion 42 that is a tubular body having a cylindrical cross-section. The push button portion 43 is a tubular body having a diameter larger than that of the tubular portion 42. The tubular portion 42 and the push button portion 43 are provided on a concentric shaft and integrally formed. From the lower end of the push button 43, a rotation preventing column 48 that extends to prevent rotation of the piston is provided. Inside the root of the rotation prevention pillar 48,
A pin 49 is provided which serves as a guide pin for the piston 41 when the piston 41 slides . As shown in FIG. 4B, the pin 49 has a columnar shape with a circular cross-sectional shape. The cross-sectional shape of the pin 49 is not limited to the circular cross-sectional shape and may be, for example, a square, a rectangle, or an ellipse.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0019

[Correction method] Change

[Correction content]

FIG. 5 shows a vertical sectional view of the piston 41. Inside the tubular portion 42, there is a tapered conduit 44 which is a tapered conduit, an upper opening 45 is at the upper end side surface of the tapered conduit, a lower end opening 47 is at the lower end , and a lower end is at the lower end side.
Side openings 46 are provided respectively.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0024

[Correction method] Change

[Correction content]

The outlet pipe 55 is provided with a syringe taper-shaped portion 63 having a syringe taper-shaped outer shape, and the syringe taper-shaped portion 63 is provided between the syringe taper-shaped portion 63 and the second tubular portion 57. A flange 64 having a width larger than the diameter is provided. As shown in FIG. 9, a cutout portion 65 is provided on the side surface of the flange 64.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction content]

11 (a) and 11 (b), the elbow member 7 attached to the suction control device 6 used in this embodiment.
Indicates 0. The elbow member 70 includes a taper conduit portion 72 having a second syringe taper-shaped portion 99 therein and a taper conduit portion.
An orthogonal pipe path portion 73 that is orthogonal to each other is provided. Further, the second ribs 69 are provided at three locations on the outer circumference of the tapered conduit portion 72 at intervals of 90 degrees. Further taper line 72
Is provided with parallel flat surface portions 74 which are two surfaces parallel to each other by cutting out the outer periphery thereof. The outer shape of the end portion of the orthogonal conduit portion 73 is a tapered portion 75 processed into a tapered shape for attaching the suction tube.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Name of item to be corrected] 0027

[Correction method] Change

[Correction content]

FIG. 12A shows a top view of the operating section 2 used in this embodiment, and FIG. 12B shows a side view of the operating section 2. A fixing hole portion 76 for attaching the suction control device 6 is provided between the air / water feeding valve 7 and the remote switch 8 provided in the operation unit 2. Fixing hole 7
Reference numeral 6 denotes a side wall portion 77 and a side wall portion 77 which are parallel to each other.
The curved wall surface 78 is a surface having a semicircular horizontal cross-sectional shape that connects the two. Further, a side opening 80 is provided at a position facing the curved wall surface 78, the side opening 80 opening to a side surface 79 of the operating portion, which is a side surface of the operating portion 2, and an upper opening 81 is provided at the upper surface of the operating portion. Side surface 79 of the operating portion of the side wall portion 77
The third rib 82 protruding from the side wall is provided on the side.
ing. The space between the third ribs 82 is wider than the fixing hole portion 76.
A narrow fixing hole narrow portion 91 is formed. The fixing hole portion 76 is also provided in a direction orthogonal to the long axis direction of the operation portion 2.

[Procedure correction 6]

[Document name to be amended] Statement

[Name of item to be corrected] 0030

[Correction method] Change

[Correction content]

Next, the piston 41 is inserted into the cylinder 54. At this time, the mounting position is adjusted while rotating the piston 41 with respect to the cylinder 54 so that the pin 49 provided inside the push button portion 43 is engaged with the pin introduction groove portion 58 provided on the outer periphery of the cylinder 54. To do.
Since the pin 49 is provided at the base of the anti-rotation column 45, the pin 45 can be engaged with the pin introduction groove 58 by using the anti-rotation column 45 as a guide. When the piston 41 is pushed in after the pin 49 is engaged with the pin introduction portion 58 as shown in FIG. 17A, the pin 49 reaches the right end portion of the transition groove portion 60. Here, as shown in FIG.
When pin 1 is rotated counterclockwise in the figure, pin 49 reaches pin insertion groove 59. Therefore, when the external force applied to the pin is eliminated, the pin 49 engages with the pin insertion groove 59 by the reaction force of the spring 83. As a result, the piston 41 is attached at a predetermined position, and as shown in FIG. 17C, the pin 49 moves vertically inside the pin insertion groove 59 during actual use. The length of the pin insertion groove 59 is the piston 41.
Has a length equal to or longer than the distance that it moves vertically inside the cylinder. The lower end of the pin insertion groove 59 is an open end 89 having no wall in this embodiment. By providing the open end 89, the washability of the pin insertion groove portion 59 is improved. Also, when the piston 41 is pushed in, as shown in FIG.
The lower end of No. 3 and the flange 64 are in contact with each other to regulate the downward sliding of the piston. FIG. 19A shows a state in which the piston 41 is released after the piston 41 is attached to the cylinder 57. At this time, the tubular portion 42 is present between the outlet side conduit 55 and the inlet side conduit 56, and the outlet side conduit 55 and the inlet side conduit 56 are not in communication with each other. On the other hand, FIG. 19B shows a state in which the piston 41 is pushed in. At this time, the inlet side conduit 56, the upper opening 45, the taper conduit 44, the lower end side opening 47, and the outlet side conduit 55 communicate with each other. Outlet side pipeline 5
Since the suction pump is connected to the 5 side, when the suction pump is operated in this state, suction can be performed from the inlet side conduit 56.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0031

[Correction method] Change

[Correction content]

By the way, as shown in FIG. 18, the downward sliding of the piston is regulated by providing a wall portion 100 at the lower end of the pin insertion groove portion 59 and abutting the pin 49 on this portion to slide the piston. May be regulated. At this time, pin 4
9 but sometimes scratch the wall portion 100 hits the wall 100, as shown in FIG. 25, since the rotation preventing post 48 cover this part, it will not be noticeable appearance this flaw.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0033

[Correction method] Change

[Correction content]

Next, the second syringe tapered portion 99 provided on the inner surface of the elbow member 70 and the syringe tapered portion 63 provided on the outlet conduit 55 are fitted together. Since the syringe tapers are fitted to each other, this portion will not come off during normal use. Further, at this time, as shown in FIG. 20, the second rib 69 and the third rib 82 come into contact with the parallel plane portion 74 and the third rib 82, respectively, so that the elbow member 70 is inserted into the fixing hole portion 76. Does not rotate. At the same time, even when an upward force is applied to the cylinder 54 in FIG. 20 , the second rib 69 and the third rib 82 come into contact with each other, so that the cylinder 54 does not come out upward.

[Procedure Amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0036

[Correction method] Change

[Correction content]

Thus, the suction control device 6 of this embodiment
Is a rotation preventing means for the piston 41 attached to this.
Pin 49, introduction groove portion 58, insertion groove portion 59, transition groove
Since the portion 60 is provided outside the cylinder 54, the cylinder 5
4 There are no protrusions inside. That is, the rotation preventing means is not provided on the sliding surface between the piston 41 and the cylinder 54. Therefore, the cleanability of the cylinder 54 is improved.
Further, since the cylinder 54 and the piston 41 can be attached to and detached from the operating portion 2, the inside of the cylinder 54 can be easily cleaned.

[Procedure Amendment 10]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

[Procedure Amendment 11]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

[Figure 5]

[Procedure Amendment 12]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 14

[Correction method] Change

[Correction content]

FIG. 14

[Procedure Amendment 13]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 21

[Correction method] Change

[Correction content]

FIG. 21

Claims (1)

[Claims] 1. A cylinder having a plurality of connection ports to which a plurality of conduits of an endoscope are respectively connected, and a piston forming a passage for establishing communication between the connection ports, the piston being the cylinder. In the endoscope channel switching control device that is inserted into the inside to control the communication state of the connection ports, positioning means for positioning the piston with respect to the cylinder is integrated with the cylinder and the piston, respectively. And a conduit switching control device for an endoscope, which is provided on a portion other than a sliding surface between the piston and the cylinder.