JPH06319699A - Suction control device for endoscope - Google Patents

Abstract

PURPOSE:To provide the suction control device of an endoscope capable of surely cleaning a suction cylinder in a short time. CONSTITUTION:This suction control device of an endoscope controlling the suction of suction pipes is constituted of a suction cylinder 44, which is provided with a pair of connection ports connected to a suction pipe opened at the insertion section tip of an endoscope and a suction pipe communicated with a suction source on the cylindrical outer periphery and provided with a communicating path with the outside air at the lower end, and a suction piston 47, which is inserted into the suction cylinder 44 to form a passage communicating a pair of connection ports together. The suction cylinder 44 is provided with an inner wall perpendicular to the center axis and having no recess on an optional cross section passing through the center axis.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction control device for an endoscope, which controls a suction operation performed through a suction conduit of the endoscope.

[0002]

2. Description of the Related Art Generally, when observing the inside of a body cavity with an endoscope,
Observation is performed through an observation window provided at the tip of the insertion portion of the endoscope, but if mucus or water in the body cavity adheres to the observation window, the observation is hindered. Therefore, in the conventional endoscope, a suction port is provided at the tip of the insertion portion, and mucus in the body cavity is suctioned and removed through this suction port.

The suction port communicates with a suction conduit provided in the endoscope, and a suction control device provided in the middle of the suction conduit is operated to suck the suction source through the suction conduit. Has become. The suction operation is also used when removing air, liquid, and the like in the body cavity.

By the way, since dirt and the like in the body pass through the suction conduit and the suction control device by this suction operation, it is desired that the suction conduit and especially the suction control device be easily washed.

Therefore, the one described in Japanese Utility Model Laid-Open No. 54-115790 is known as a suction control device having improved cleaning performance. According to the above conventional technique, FIG.
As shown in the cross-sectional view of the suction control device of (a), both ends of the suction cylinder 151 are opened, and the inner peripheral surface of the suction cylinder 151 is upwardly communicated with a suction port (not shown) of the endoscope tip. A connector-side suction pipe line 153 communicating with a suction pump (not shown) is opened below the side suction pipe line 152.

The suction piston 154, which is inserted into the suction cylinder 151 for starting and stopping the suction operation, is biased upward by a spring 157 arranged between a suction button 155 and a cylinder cap 156. Movement is restricted by an O-ring 158 inserted into the inner circumference of the suction cylinder 151 and a locking protrusion 159 formed on the suction piston 154.

A gap is formed between the opening of the suction side conduit 152 of the suction cylinder 151, the opening of the suction side conduit 153 of the connector, and the suction piston 154. At the lower end of the suction piston 154, a locking edge 160 that is slightly thinner than the diameter of the suction cylinder 151.
A packing 161 is inserted above the locking edge 160 while leaving a gap with the suction cylinder 161, and a suction cylinder 151 corresponding to between the packing 161 and the locking projection 159 is formed. The connector-side suction conduit 153 is opened and normally leaks from the lower end of the suction cylinder 151 so as to suck outside air as shown by an arrow A.

The operation of the above construction will be described next. When the air and water injected into the body cavity and the dirt and the like in the body cavity are sucked and discharged out of the body cavity, as shown in the sectional view of FIG. 30 (b). When the suction button 155 pushes down the suction piston 154 against the spring 157, water and dirt that have been sucked from the tip of the insertion portion (not shown) and have reached the suction cylinder 151 via the suction tube 152 on the tip side are indicated by arrow B. As shown in the drawing, it flows into the space between the suction piston 154 and the suction cylinder 151, and is discharged from the connector-side suction pipeline 153 that opens above the lowered locking projection 159.

The operation of the engaging edge 160 formed at the lower end of the suction piston 154 will be described. When the above-described structure is washed by an automatic washing machine or the like, as shown in the sectional view of FIG. 154 to push down the locking edge 16
If an open plate 162 having a predetermined thickness is inserted between 0 and the lower end of the suction cylinder 151, a cleaning liquid or the like can be flowed as shown by an arrow C.

[0010]

However, in the above-described suction control device, the suction operation is controlled by pushing the suction piston, but during standby, a gap is formed between the packing inserted in the suction piston and the inner wall of the suction cylinder. Therefore, the outside air and the suction pipe on the connector side are leaking, and the packing and the inner wall of the suction cylinder are in close contact with each other at the time of suction and automatic cleaning to seal the suctioned substance or the cleaning liquid from leaking to the outside.

Further, since the locking projection formed on the suction piston is urged by the O-ring inserted into the suction cylinder during standby, there is a circumferential recess on the inner wall of the suction cylinder.

The recess on the inner wall of the suction cylinder affects the direction in which the flow rate of the cleaning liquid decreases when cleaning with an automatic cleaning machine or the like, which causes the cleaning time to increase. Further, even when the inner wall of the suction cylinder is washed with a brush, it is difficult for the brush to come into contact with the concave portion, which causes a long washing time.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a suction control device for an endoscope capable of reliably cleaning the inner wall of a suction cylinder or the like in a short time. is there.

[0014]

In order to achieve the above-mentioned object, the present invention provides a pair of a suction pipe line that is open at the distal end of the insertion portion of an endoscope and a suction pipe line that communicates with a suction source. The suction pipe line includes a cylinder having a connection port on its outer circumference and a communication passage at the lower end for communicating with the outside air, and a piston which is inserted into the cylinder and forms a passage for communicating the pair of connection ports. In the suction control device for an endoscope for controlling suction of the cylinder, the cylinder has an inner wall which is perpendicular to the central axis and has no recess in an arbitrary cross section passing through the central axis.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 show a first embodiment, FIG. 1 is a schematic configuration diagram of an endoscope, FIG. 2 is a perspective view of an air / water feeding piston of an air / water feeding control device, and FIG. 3 is air / water feeding control. FIG. 4 is a vertical sectional side view of the apparatus, FIG. 4 is a sectional view of the suction control device in a standby state, FIG. 5 is a sectional view of the suction control device in a suction state, and FIG. 6 is a perspective view in which a part of the suction piston is broken.

As shown in FIG. 1, the endoscope 1 includes an operation portion 2 having a wide width, an elongated insertion portion 3 whose rear end is connected to a front end of the operation portion 2, and a side of the operation portion 2. The universal cord 4 is connected to the section, and the connector section 5 is provided at the rear end of the universal cord 4.

By connecting the connector portion 5 to the light source device 6, illumination light is supplied to the light guide 7. The light guide 7 is composed of a fiber bundle, transmits the illumination light supplied from the light source device 6 to one end face thereof, and is located on the subject side in front of the other end face (not shown) fixed to the distal end portion of the insertion portion 3. The illumination light is emitted to.

The illuminated subject is imaged on a solid-state image pickup device (hereinafter abbreviated as SID) 9 disposed behind the observation window 8 at the tip. The SID 9 photoelectrically converts the optical image into an electrical signal, which is guided to the electrical contact 11 of the connector portion 5 via the electrical cable 10.

In addition, inside the insertion portion 3, there are provided a tip side suction pipe line 12 for suctioning, a tip side air supply pipe line 13 for supplying air, and a tip side water supply pipe line 14 for supplying water. Has been.

The tip sides of the tip side air supply conduit 13 and the tip side water supply conduit 14 join together in the vicinity of the tip of the insertion part 3 to form one common conduit 15 at the tip of the common conduit 15. Air or water can be supplied through the injection nozzle 16 provided, and the observation window 8 can be washed.

The rear end of the suction pipe line 12 on the front end side has an operating portion 2
Is connected to a suction mouthpiece 19 projecting from the connector portion 5 via a connector-side suction pipeway 18 in the universal cord 4 which is connected to the suction control device 17 provided in the suction mouthpiece 19. The suction tube 26 is connected to communicate with the suction pump 27, and suction can be performed by operating the suction control device 17. Further, the operation section 2 is formed with a forceps port 133 which is opened by a forceps channel 132 through which a treatment tool or the like branched from the distal side suction channel 12 is inserted.

The air / water supply control device 2 provided in the operating portion 2 is provided at the rear ends of the tip side air supply conduit 13 and the tip side water supply conduit 14.
0 through the connector-side air supply conduit 21 and the connector-side water supply conduit 22 in the universal cord 4,
In the connector side air supply pipeline 21, a pressurized air supply pipeline 23 branches in the connector part 5, and is connected to the connector side water supply pipeline 22 and connected to an air supply / water supply mouthpiece 24 projecting from the connector part 5 to open. .

Further, the in-connector air supply conduit 21 is connected to the air supply mouthpiece 25 at the end of the connector portion 5 and opens.
When the connector portion 5 is connected to the light source device 6, air is sent to the connector-side air supply conduit 21 from an air supply pump (not shown). At this time, the conduit resistance from the branched portion of the pressurized air supply conduit 23 of the connector-side air supply conduit 22 to the air supply mouthpiece 25 and the conduit resistance of the pressurized air supply conduit 23 are the orifices (not shown) at the openings of the respective mouthpieces. Resistance portions are provided so as to be equal to each other, and when the endoscope 1 is washed, the air / water supply device 2
An equal flow rate is obtained when a cleaning liquid or the like is injected from 0.

Further, the air supply / water supply cap 24 has a connecting member 2
An air supply tube 30 for pressurizing the cleaning water in the water supply tank 29 via 8 and a water supply tube 31 extending to the cleaning water
Are connected. Then, the air / water supply can be performed by operating the air / water supply control device 20 of the operation unit 2.

Next, the structure of the air / water supply controller 20 will be described with reference to FIGS. 2 and 3. The air / water feeding cylinder 32 is a substantially bottomed cylinder, and is fixed to the outer wall portion 33 of the operation portion 2 with an O-ring 139 while being screwed and fixed thereto.

On the peripheral wall of the air / water feeding cylinder 32, a connector-side air / water feeding pipeline 21 is connected and opened via a connecting pipe 138 in the middle stage, and the same circumferential direction as the opening of the connector-side air / water feeding pipeline 21 is provided. The check valve 35, which is opened by connecting the tip side air supply conduit 13 to the lower stage, is connected and opened via a connecting pipe 138. The check valve portion 35 has a structure that allows fluid to pass only in the direction of arrow B in FIG.

Further, the connector side water supply conduit 22 is connected and opened via a connection pipe 138 at an intermediate stage in the circumferential direction different from the opening of the connector side air supply conduit of the air supply / water supply cylinder 32, and this connector is opened. The tip side water supply conduit 14 is connected to the connection pipe 1 at the lower stage in the same circumferential direction as the opening of the side water supply conduit 22.
It is connected through 38 and is open.

A locking pin 36 is screwed and fixed to the upper stage of the air / water feeding cylinder 32 so that the tip of the locking pin 36 projects from the inner peripheral wall of the air / water feeding cylinder 32. An air / water feeding piston 37 is inserted into the air / water feeding cylinder 32, and a coil spring 38 is provided at the lower end of the air / water feeding piston 37. The air / water feeding piston 37
The hook-shaped groove 39 provided on the outer peripheral wall of the
6 is inserted, and the air / water feeding piston 37 and the air / water feeding cylinder 32 are circumferentially positioned by the locking pin 36 and the groove 39, and the air / water feeding piston 37 is in the standby state and the air / water feeding state and water feeding. The stroke of the state is regulated, and at the same time, the coil spring 38 urges the stroke upward.

The air / water feeding piston 37 has a hole penetrating in the vertical direction to form the leak hole 40, and at the same time, in the standby state and the air feeding state, the connector side air feeding conduit 21 of the air / water feeding cylinder 32. A vertical groove 41 is provided from the outer peripheral position corresponding to the opening to the lower end, and the outer peripheral position corresponding to the connector side water supply pipe line 22 opening and the tip side water supply pipe line 14 opening of the air / water supply cylinder 32 in the water supply state. Vertical groove 42 to tie
Is provided.

Further, an air / water supply button 43 having a hole forming a leak hole 40 at the upper end of the air / water supply piston 37.
Is fixed, and the outer peripheral portion of the air / water feeding button 43 is outside the mounting ring 34 in the circumferential direction, and the air / water feeding button 43 is fixed.
The dirt and the like adhering to is prevented from mixing into the air / water supply cylinder 32.

The operation of the air / water supply control device 20 configured as described above will be described. In the standby state, the air sent to the connector side air supply conduit 21 by the air supply pump (not shown) in the light source device 6 is It enters into the air / water feeding cylinder 32 through the vertical groove 41 of the air / water feeding piston 37. Check valve 3 here
5. Since the conduit resistance of the tip side air supply conduit 13 and the like is large, the air passes between the coil springs 38 and the leak hole 40.
It leaks to the outside through the (arrow A). Therefore, no air or water is sent.

In the air supply state, the air supplied in the same manner enters the air supply / water supply cylinder 32, but if the leak hole 40 is closed with a finger here, the check valve 35 and the tip end side along the arrow B are shown. Air is sent through the air supply line 13, the common line 15, and the injection nozzle 16.

In the water feeding state, the air feeding / water feeding button 43 is pushed downward until the stroke is restricted by the groove 39 of the air feeding / water feeding piston 37 and the locking pin 36, so that the air feeding / water feeding piston 37 resists the coil spring 38. And then pushed down. Vertical groove 41 of air / water feeding piston 37
Also moves downward, and the opening of the connector side air supply conduit 21 is blocked.

At the same time, the vertical groove 42 of the air / water feeding piston 37 also moves downward, and the vertical groove 42 allows the opening of the connector-side water feeding conduit 22 and the tip-side water feeding conduit 14 to communicate with each other to be in a water feeding state. That is, the air sent into the connector-side air supply conduit 21 by the air supply pump (not shown) passes through the pressurized air supply conduit 23 branched in the connector part 5, the air supply / water supply mouthpiece 24, the connector 28, and the air supply tube. The water reaches the inside of the water supply tank 29 through 30, and the washing water is pressurized.

This washing water is supplied with a water supply tube 31 and a connecting tool 2.
8. Water supply conduit 22 on the connector side via the air / water supply cap 24
In the air / water feeding cylinder 32, water is fed through the vertical groove 42 of the air / water feeding piston 37 in the air / water feeding cylinder 32 through the tip side water feeding conduit 14, the common conduit 15, and the injection nozzle 16.

Next, referring to FIGS. 4 and 5, the suction control device 17
The structure of is explained. The suction cylinder 44 has a substantially cylindrical shape with open upper and lower ends, a large inner diameter at the upper end, and a small inner diameter at the lower end. The upper end is sealed to the outer wall portion 33 of the operating portion 2 by the O-ring 139 and screwed by the mounting ring 45. It is fixed.

On the peripheral wall of the suction cylinder 44, the suction line 18 on the connector side and the suction line 1 on the tip side are provided at positions opposed to each other on the circumference.
2 are obliquely connected to each other via connection pipes 138 and open. A locking pin 46 is screwed and fixed near the upper end of the suction cylinder 44 so that the tip of the locking pin 46 projects from the outer peripheral wall of the suction cylinder 44.

The suction cylinder 44 has a suction piston 4
7, a hook-shaped groove 48 similar to that shown in FIG. 2 is provided on the circumferential wall of the substantially cylindrical sleeve portion 57 of the suction button 49 that is in contact with the flange portion of the suction piston 47. The engaging pin 46 is inserted and fitted, and the suction cylinder 44 and the suction piston 47 are circumferentially positioned by the projection 135 of the sleeve 57 which is fitted in the vertical groove 134 provided in the suction piston 47. The suction piston 4
7, the strokes of the standby state and the suction state are regulated, and at the same time, the suction button 49 provided on the suction piston 47 is provided.
The suction piston 47 is biased upward by the bamboo shoot spring 50 interposed between the head portion 56 and the sleeve portion 57.

In the suction state, the suction piston 47 is provided with a through hole 51 connecting the opening of the connector-side suction pipeline 18 and the outer peripheral portion corresponding to the opening of the tip-side suction pipeline 12 in the standby state. In the above, the lower end surface is formed with a certain angle so as to block only the opening of the suction pipe line 12 on the tip side.

The bamboo shoot spring 50 is closely wound,
The dirt in the body cavity is prevented from scattering from the gap between the upper ends of the suction cylinder 44 and the suction piston 47 in the suction state. Further, the check valve 52 formed of an elastic material such as silicone rubber and fixed to the lower end opening of the suction cylinder 44 is also inside the body cavity in a suction state from the gap between the suction cylinder 44 and the lower end of the suction piston 47. The connector side suction pipe line 18 is kept in a standby state while preventing scattering of dirt.
And the outside air is leaking.

Next, the operation of the suction control device 17 configured as described above will be described. In the standby state as shown in FIG. 4, when the suction tube 26 is connected to the suction mouthpiece 19 projecting from the connector portion 5 and the suction pump 27 is operated, the connector-side suction conduit 18 and the tip-side suction conduit 12 are connected. Since is blocked by the suction piston 47, the outside air is sucked through the leak hole of the check valve 52 along the arrow A by the suction force acting on the connector side suction conduit 18. Therefore, the body fluid or the like in the body cavity is not sucked.

As shown in FIG. 5, in the suction state, the suction button 49 is pushed downward until the stroke is restricted by the vertical groove 134 and the projection 135 of the suction piston 47, whereby the suction piston 47 resists the bamboo shoot spring 50. Then, the connector side suction conduit 18 and the tip side suction conduit 12 are communicated with each other through the through hole 51, so that the suction force acting on the connector side suction conduit 18 is taken along the arrow B along the endoscope. By acting on the tip side suction conduit 12 opened at the tip of 1, the body fluid and the like in the body cavity is sucked.

When the suction control valve 17 is washed, the suction piston 47 is pulled out from the suction cylinder 44 and washed with an ultrasonic washing machine or the like. The inner peripheral wall of the suction cylinder 44, the connector-side suction pipeline 18 and the tip-side suction pipeline are each injected with a cleaning liquid or the like and washed with a brush or the like.

As described above, in the first embodiment, the connector side air supply conduit 21, the tip side air supply conduit 13, and the connector side water supply conduit 22 connected to the air supply / water supply cylinder 32 in the air supply / water supply control device 20. Since the tip end side water supply conduit 14 is opened in the same circumferential direction and the air supply and water supply are controlled by the two vertical grooves 41, 42, packing or the like is unnecessary and the structure is simplified.

A coil spring 38 is provided below the air / water feeding piston 37, and the air / water feeding piston 37 is positioned with respect to the air / water feeding cylinder 32 by the locking pin 36 and the groove 39. When the piston 37 is removed from the air / water feeding cylinder 32, the air / water feeding piston 37
Since there is no place hidden on the surface, the time of ultrasonic cleaning can be shortened.

In the suction control device 17, the suction piston 4
Since the lower end surface of 7 is formed with a certain angle so as to be in a suction standby state, the suction piston 47 has a simple structure. Further, when the inner peripheral wall of the suction cylinder 44 is washed with a brush from the upper end, there is no portion not contacted by the brush, and the labor for washing is reduced.

7 to 14 show the second embodiment, and FIG.
8 is a schematic configuration diagram of an endoscope, FIG. 8 is a perspective view of an endoscope operating portion, FIG. 9 is a vertical cross-sectional side view of an air / water feeding control device, and FIG. 10 is another configuration of a packing portion of an air / water feeding piston. Sectional view, Figure 1
1 is a cross-sectional view of a connecting portion of each line for air / water supply and suction, FIG. 12 is a cross-sectional view of the suction control device in a standby state, FIG. 13 is a cross-sectional view of the suction control device in a suction state, and FIG. 14 is a perspective view of a connector portion. It is a figure.

As shown in FIG. 7, in the endoscope 1 of the present embodiment and the first embodiment, the connector side air supply conduit 21 and the connector side water supply conduit 22 are connected to the air supply / water supply button 43, and the connector The side suction pipe line 18 is connected to the suction button 49 and passes outside the universal cord 4, the air supply adapter 53 is used when connecting the connector part 5 to the light source device 6, and the water supply tank 29 is connected to the connector side. The air supply conduit 21, the connector-side water supply conduit 22, and the pressurized air supply conduit 23 are differently connected, but other than that are substantially the same, and the endoscope 1
The action is almost the same.

Next, as shown in FIGS. 8 and 11, in this embodiment, as described above, one end of the connector side air supply conduit 21 and the connector side water supply conduit 22 is detachably connected to the air supply / water supply button 43. Further, one end of the connector side suction pipeline 18 is detachably connected to the suction button 49, and the tubes of the three pipelines are connected to the universal cord 4 of the outer wall portion 33 of the operation portion 2.
Is fixed in the vicinity of the fixed portion by being pushed into a fixing groove 54 provided in the same direction as the extension direction of the universal cord 4.

Universal cord 4 is provided at the other end of the three conduits.
The connector-side suction pipe line 18 is detachably connected to the suction tube 26 via the relay member 55 fitted to, and communicates with the suction pump 27. The connector-side air supply pipe line 21 is connected to the air supply tube and the connector-side water supply pipe. The passage 22 is detachably connected to the air supply tube 30 and communicates with the water supply tank 29, respectively.

The three pipelines configured as described above are cleaned by detaching the respective tubes from the relay member 55 during cleaning. The relay member 55 is also detached from the universal cord 4 and washed.

Next, the structure of the air / water supply controller 20 will be described with reference to FIG. The air / water feeding cylinder 32 has a substantially cylindrical shape, and is screwed and fixed to the outer wall portion 33 of the operation portion 2 by the mounting ring 34 as in the first embodiment, and the lower end is opened to the outside from the outer wall portion 33. The opening has a large diameter and the lower opening has a small diameter.

On the peripheral wall of the air / water feeding cylinder 32, the tip side water feeding pipeline 14 is connected to the upper stage and the tip side air feeding pipeline 13 is connected to the lower stage via a connecting pipe 138 to open. An air / water feeding piston 37 is inserted into the air / water feeding cylinder 32, and a head portion 56 of an air / water feeding button 43 is screwed and fixed to the upper end of the air / water feeding piston 37. Further, the mounting portion 58 is insert-molded with a resin having elasticity to the substantially cylindrical sleeve portion 57 of the air / water feeding button 43, and the mounting ring 34 is provided.
The sleeve portion 57 is fitted to the air / water feeding cylinder 32 by being mounted on.

The flange portion 59 of the air / water feeding piston 37 abuts on the lower end of the sleeve portion 57, and the air / water feeding button 5
The air / water feeding piston 59 is urged upward by a spring 60 interposed between the head portion 56 and the sleeve portion 57. The connector side air supply conduit 21 is provided on the upper stage of the sleeve part 57 of the air supply / water supply button 43, and the connector side water supply conduit 2 is provided on the lower stage.
2 are connected and open.

The air / water feeding pistons 37 have a smaller outer diameter than the inner circumference of the sleeve portion 57 and the inner circumference of the air / water feeding cylinder 32 at the corresponding positions, and have a diameter at a position corresponding to the opening of the connector-side air feeding conduit 21. It has a through hole 61 in the direction. Packings 62 and 63 are fitted on the upper and lower sides of the through hole 61, respectively, and the packing 6 is also provided near the upper portion of the flange 59.
4 is fitted. The three packings 61, 62, 63 slide on the inner circumference of the flange portion 59 and seal the fluid (washing liquid, air, etc.).

Further, the air / water feeding piston 37 is located below the flange 59 between the positions corresponding to the respective openings of the tip side air feeding pipeline 13 and the tip side water feeding pipeline 14 in the standby state, the air feeding state and the water feeding state. The packing 65 also fits in the portion that seals the air-supplying and water-feeding cylinder 32 below the position corresponding to the opening of the tip-side air-feeding conduit 13 in the standby state and in the air-feeding state and at the upper end large diameter opening of the air-feeding and water-feeding cylinder 32. A check valve 66 that seals the fluid by a step 69 formed by a small diameter opening at the lower end and that restricts the stroke of the air / water feeding piston 37 is fitted.

Further, the air / water feeding piston 37 has a check valve 66.
A through hole 67 is provided further downward in the diametrical direction, and a packing 58 is fitted below the through hole 67. Above 5 packings 6
When the 2, 63, 64, 65, 68 and the check valve 66 are fitted to the air / water feeding piston 37, a silicone adhesive is filled in the gap. A leak hole 40 penetrates and opens from the through hole 67 to the upper end of the air / water feeding piston 37.

The operation of the air / water supply control device 20 configured as described above will be explained. In the standby state, the air supplied to the pressurized air supply conduit 23 by the air supply pump (not shown) in the light source device 6 is supplied to the air supply device. Tank 29, connector side air supply line 21,
It enters the through hole 61 in the air / water feeding cylinder 32 through the sleeve portion 57 of the air / water feeding button 43.

Here, since the conduit resistance of the tip side air supply conduit 113, etc., passing through the leak hole 40, the through hole 67 and the check valve 66 is large, the air leaks from the upper part to the outside air through the leak hole 40. (Arrow A). Therefore, no air or water is sent.

In the air supply state, the air similarly supplied enters the through hole 61 in the air supply / water supply cylinder 32.
If the leak hole 40 is closed with a finger here, the through hole 67, the check valve 66, the tip side air supply pipeline 13, the common pipeline 1 are taken along the arrow B.
5, the air is sent through the injection nozzle 16.

In the water supply state, the head 5 of the air / water supply button 43
By pushing 6 downwards until the stroke is restricted by the step due to the check valve 66 and the large-diameter upper opening and the small small-diameter opening of the air / water feeding cylinder 32, the air / water feeding piston 37 moves downward against the spring 60. Pushed down to.

The packing 64 of the air / water feeding piston 37 also moves downward, and moves downward from the inner peripheral lower end of the sleeve portion 57 of the air / water feeding button 43, and the opening of the connector-side water feeding conduit 22 and the tip-side water feeding conduit. The openings of 14 are communicated with each other to be in a water supply state. That is, the air sent into the pressurized air supply conduit 23 by the air supply pump (not shown) reaches the water supply tank 29 and the cleaning water is pressurized. This washing water is the water line 2 on the connector side.
In the air / water supply cylinder 32, the water is supplied through the front end side water supply pipe line 14, the common pipe line 15, and the injection nozzle 16 along the arrow C in FIG.

Further, the air / water supply piston 37 and the air / water supply button 43 are removed from the air / water supply cylinder 32 at the time of cleaning, and the connector side air supply pipeline 21 and the connector side water supply conduit 22 are removed from the air / water supply cylinder 32 at the time of cleaning. The respective tubes of the side air supply pipe line 21 and the connector side water supply pipe line 22 are removed and cleaned by ultrasonic cleaning or the like. Further, the air / water feeding cylinder 37 is washed with a dedicated brush.

Next, the structure of the suction control device will be described with reference to FIGS. The suction cylinder 44 has a substantially cylindrical shape with open upper and lower ends and no step due to a change in inner diameter on its peripheral wall, and its upper end is screwed and fixed to the outer wall portion 33 of the operating portion 2 with the mounting ring 45 as in the first embodiment. Has been done. The distal suction pipe line 12 is connected to the peripheral wall of the suction cylinder 44 from a diagonally lower side through a connection pipe 138 and opens.

The suction cylinder 44 has a suction piston 4
7 is inserted, and the locking pin 46 and the hook-shaped groove 48 (both not shown) as in FIGS. 4 and 5 of the first embodiment.
Further, the protrusion 135 of the sleeve portion 57 that fits into the vertical groove 134 provided in the suction piston 47 is positioned on the circumference, and the standby state, the suction state and the stroke of the suction piston 47 are restricted.

The head portion of the suction button 49 screwed to the upper end of the suction piston 47 and the sleeve portion 11 of the suction button 49 which is substantially cylindrical and has a flange portion 70 at the upper end of the inner circumference are interposed. The suction piston 47 is biased upward by the bamboo shoot spring 50. Also, the suction button 49
A connector-side suction conduit 18 is detachably connected to the sleeve portion 11 and opens.

The suction piston 47 is provided with a vertical groove 73 up to the lower end of the suction piston 47 so that only the connector side suction pipeline 18 communicates with the lower end opening of the suction cylinder 44 in the standby state. It is fitted to the suction cylinder 44 up to the length so as to block. Further, in the suction state, the suction piston 47 corresponding to the opening of the connector side suction pipeline 18 and the opening of the tip side suction pipeline 12 is provided.
A through hole 51 connecting the positions is provided. A check valve 52 is adhesively fixed to the lower end opening of the suction cylinder 44 in the same manner as in the first embodiment, thereby leaking the connector side suction conduit 18 and the outside air.

The suction control device 17 configured as described above
The action of will be explained. As shown in FIG. 12, when the suction pump 27 is operated in the standby state, the connector-side suction conduit 18
Since the front end side suction conduit 12 is blocked by the suction piston 47, the outside air is sucked along the arrow A by the suction force acting on the connector side suction conduit 18 through the leak hole of the check valve 52. Therefore, body fluid or the like in the body cavity is not sucked.

In the suction state as shown in FIG. 13, the suction button 49 is connected to the vertical groove 134 of the suction piston 47 and the projection 135.
By pushing downward until the stroke is restricted by, the suction piston 47 is pushed downward against the bamboo shoot spring 50, and the connector side suction conduit 18 and the tip side suction conduit 12 are communicated by the through hole 51. Therefore, the suction force acting on the connector side suction conduit 18 acts on the tip side suction conduit 12 opened at the tip of the endoscope 1 along the arrow B to suck body fluid and the like in the body cavity. .

When the suction control valve 17 is washed, the suction piston 47 and the suction button 49 are removed from the suction cylinder 44 and washed by an ultrasonic washing machine or the like. Suction cylinder 44
The inner peripheral wall, the connector-side suction pipeline 18 and the tip-side suction pipeline are each injected with a cleaning liquid or the like and washed with a brush or the like.

Next, the structure of the air supply adapter 53 will be described with reference to FIG. The air supply adapter 53 is detachably fitted into the light guide base 74 of the light guide 7 protruding from the end face of the connector 5 and the light guide insertion hole 75, and is positioned by the key 76 provided at the base of the light guide base 74. Has been done. The air supply mouthpiece 25 projects from one end surface of the air supply adapter 53, and the pressurized air supply conduit 23 projects from the other end surface and is fitted into a groove 78 provided on the side peripheral surface of the connector portion 5 to be connected to the water supply tank 29. Has been done. In this way, the connector portion 5 to which the air supply adapter 53 is connected is connected to the light source device 6 and locked by the C ring 77.

Air supply adapter 53 configured as described above
The operation of the above will be described. Pressurized air supply conduit 23 connected to the air supply cap 25 by an air supply pump (not shown) in the light source device 6.
The air is sent to and the water is sent. Connector part 5 when cleaning
It is further cleaned separately from the endoscope 1 (for example, ultrasonic cleaning).

In the second embodiment as described above, the tubes can be divided before and after the relay member 55, and if each tube is made to be transparent, it is easy to wash and it is possible to improve the degree of washing from the appearance. You can also check.

Further, since the tubes of the connector side air supply conduit 21 and the connector side water supply conduit 22 are detachably connected to the air supply / water supply piston 37, if the tubes are removed during cleaning, two tubes, the air supply / water supply piston 37 is easy to wash, and since the structure of the air / water feeding cylinder 32 is simple, it is easy to wash. In addition, since the lower end of the air / water feeding cylinder 32 is open, the drainage of water after washing is improved.

When the check valves 66 are fitted to the five packings 62, 63, 64, 65, 68 of the air / water feeding piston 37, the clearances are filled with the silicone adhesive so that the clearances of the packings, etc. are filled. No dirt is attached and the cleaning time is shortened. In order to obtain the same effect as this, as shown in FIG. 10, packing or the like can be extended both vertically in the axial direction of the air / water feeding piston 37, and a thread can be wound and adhered to this extended portion.

As in the first embodiment, the suction control valve 17 has a simple structure, which not only saves labor at the time of washing, but also fixes the connector side suction conduit 18 to the fixing groove 54 of the operating portion 2. Because it is done, the tube does not vary. Further, since the connector-side suction conduit 18 is removable, it can be replaced. In the air supply adapter 53, not only the branch portion does not exist in the connector portion 5 as in the conventional case, but also ultrasonic cleaning can be performed as a separate body from the endoscope 1, so that the time and effort required for cleaning can be greatly reduced.

15 to 24 show the third embodiment, and FIG.
5 is a schematic configuration diagram of the endoscope, FIG. 16 is a perspective view of the endoscope operation section, FIG. 17 is a perspective view of the air supply connector and the connector section, and FIG. 18 is a vertical side view of the air supply / water supply control device. 19 is an operation explanatory view of another air supply / water supply control device, FIG. 20 is a cross-sectional view of the suction control device in a standby state, FIG. 21 is a cross-sectional view of the suction control device in a suction state, and FIG. 22 is air supply / water supply to the operation unit. FIG. 23 is a cross-sectional view of a main part connecting suction tubes, FIG. 23 is another cross-sectional view of connecting air supply tubes, water supply tubes, and suction tubes to the operation section, and FIG. 24 is another operation section and air supply tubes, water supply. FIG. 3 is a cross-sectional view of a main part in which each suction tube is connected.

As shown in FIG. 15, the endoscope 1 according to the present embodiment.
Is a schematic configuration and is different from the second embodiment in the air / water control device 20.
The air / water supply unit 79 showing the whole, the suction unit 80 showing the suction control device 17 as a whole, and the operation as the endoscope 1 are substantially the same except that they can be attached to and detached from the operation unit 2.

Next, as shown in FIG. 16, in this embodiment, as described above, one end of each of the air / water supply control device 20 is detachable so that the air / water supply unit 79 can be attached / detached from the operating portion 2. The other end of the connected air supply relay tube 81 and the connected water supply relay tube 82 has the grip portion 83 of the operation unit 2 at the other end.
Is detachably connected to the tip-side air supply conduit 13 and the tip-side water supply conduit 14, respectively, via a relay cap 85 that is provided along the groove 84 provided in Has been done.

Similarly, the other end of the suction relay tube 86, one end of which is detachably connected to the suction control device 17 so that the suction unit 80 can be attached and detached from the operating portion 2, is connected to the side portion of the forceps plug 87. The forceps plug 87 is connected to the tip-side suction conduit 12 via an insertion opening 88 provided near the tip-side end of the grip portion 83.

One end of the connector side air supply conduit 21 and one end of the connector side water supply conduit 22 are detachably connected to the air supply / water supply control device 20, and the outer wall part 33 of the operation part 2 is provided near the fixed part of the universal cord 4. It is inserted into a fixing groove 54 provided in the same direction as the extension direction of the universal cord 4 and fixed by a method described later, and the other end is connected to the water supply tank 29,
Each of them constitutes an air supply tube 30 and a water supply tube 31.

At the same time, one end of the relay tube 89 of the connector side suction conduit 21 is detachably connected to the suction control device 17, and the other end has a flange 91 near both ends as shown in FIG. It is connected to one end of 90. The pipe 90 sandwiches both ends of the fixed groove 54 with two flange portions 91 and is fitted into the fixed groove 54. The suction tube 26 is detachably connected to the suction pump 27 at the other end of the pipe 90.

First, the water supply tube 3 is placed in the fixing groove 54.
1. After pushing in the air supply tube 30, the pipe 90 is fitted. The operation unit 2 configured as described above removes the air / water supply unit 79 and the suction unit 80 from the operation unit 2 at the time of cleaning, and also pulls out the respective tubes and pipes,
Do the washing individually.

Next, referring to FIG. 18, the air / water supply unit 79
The structure of is explained. The air / water feeding cylinder 32 is formed of a resin such as polysulfone (hereinafter referred to as PSF) or modified polyphenylene oxide (hereinafter referred to as modified PPO) in a substantially bottomed cylinder, and is convex in the concave portion 92 of the outer wall portion 33 of the operation unit 2. This is also PSF and modified P
A metal mounting ring 34 is screwed and fixed to the outer wall 94 formed of a resin such as PO.

At the uppermost stage of the peripheral wall of the air / water supply cylinder 32, a connector-side air supply projection 95 to which the air supply tube 30 of the connector-side air supply conduit 21 can be attached / detached is provided obliquely downward so that A communication hole 105 is opened in the peripheral wall. A connector side water supply projection 96 to which the water supply tube 31 of the connector side water supply conduit 22 is attachable and detachable is provided obliquely downward at the lower stage thereof, and a communication hole 106 is similarly opened. Further, a tip end side water supply protrusion 97 to which the water supply relay tube 82 can be attached / detached is projected on the lower stage thereof, and a communication hole 107 is similarly opened. Further, a tip end side air supply projection 98 to which the air supply relay tube 81 is attachable and detachable is provided at the lowermost stage, and the communication hole 10 is similarly formed.
8 is open.

Further, when the air / water feeding cylinder 32 is fixed to the outer wall 94, a notch 99 is provided in the outer wall 94 on the straight line connecting the positions corresponding to the connector-side water feeding projection 95 and the connector-side water feeding projection 96. The air supply tube 30 and the water supply tube 31 can be detachably connected to each other. Further, a metal locking pin 100 is screwed and fixed to the mounting ring 34 so that the head protrudes to the outer periphery.

The air / water supply cylinder 32 is provided with an air / water supply piston 3 formed of a resin such as PSF or modified PPO.
7 is inserted and fixed to the upper end of the air / water feeding piston 37 is the head 56 of the air / water feeding button 43 formed of resin such as PSF or modified PPO. Further, the substantially cylindrical sleeve portion 57 of the similarly formed air / water feed button 43 is provided with the hook-shaped groove as shown in the first and second embodiments, and the locking pin 100 is provided. The air / water feeding piston 37 can be locked to the air / water feeding cylinder 32 by being fitted to. Further, the flange 102 provided in the inner peripheral direction of the sleeve portion is provided in contact with the flange 103 provided near the upper end of the air / water feeding piston 37 in the standby state. Here, the air / water feeding piston 37 is urged upward by a metal spring 60 interposed between the head portion 56 and the flange portion 102 of the sleeve 57.

A packing 1 is attached to the air / water feeding piston 37.
No. 04 is fitted by filling the gap with a silicon adhesive, and in a standby state, a through hole 109 penetrating the air / water feeding piston 37 and the packing 104 is formed at a position corresponding to the opening of the communication hole 105 in the diameter direction. Also, from the lower end of the packing 104, the air / water feeding piston 37, the head 5 of the air / water feeding button 43
There is a leak hole 40 that penetrates up to 6 in the vertical direction.

The packing 104 also has a protrusion 110 for sealing the flow of air or the like between the flange 103 and the position corresponding to the opening of the communication hole 105 in the standby state, the air supply state and the water supply state. Holes 105 and 10
6, the projection 111 that seals the flow of air, cleaning liquid, or the like between the positions corresponding to the openings, and the air or the cleaning between the positions corresponding to the openings of the communication holes 106 and 107 in the standby state and the air supply state. The flow of liquid or the like is sealed, and air or a cleaning liquid or the like is provided between the projection 112 that passes over the communication hole 107 in the water supply state and the position corresponding to the openings of the communication holes 107 and 108 in the standby state, the air supply state, and the water supply state. And the projection 113 that seals the flow of the air and the position below the lower end of the packing 104 corresponding to the opening of the communication hole 108 allows the flow of air or the like to pass through only in the direction of arrow B in the figure in the standby state and the air supply state. In the water supply state, the check valve 115 is in contact with the step 114 of the air / water supply cylinder 32 to seal the flow of air or the like in the direction of the arrow B and to restrict the stroke of the air / water supply piston 37. It has.

The operation of the air / water supply unit 79 configured as described above will be described. In the standby state, the air supplied to the pressurizing pipe 23 by the air supply pump (not shown) in the light source device 6 is supplied to the water supply tank 29, Through the air supply tube 30 of the connector-side air supply conduit 21, the through hole 10 in the air supply / water supply cylinder 32
Enter 9. Here, the air passes through the leak hole 40, the through hole 109, the check valve 115, and the conduit resistance of the air supply relay tube 81 and the like is large, so that the air leaks from the upper side to the outside air through the leak hole 40 (arrow A). . Therefore, no air or water is sent.

In the air supply state, the air similarly supplied enters the through hole 109 in the air supply / water supply cylinder 32, but if the leak hole 40 is closed with a finger here, the through hole 109 is taken along the arrow B. Air is supplied through the check valve 115, the air supply relay tube 81, the tip side air supply pipe line 13, the common pipe line 15, and the injection nozzle 16.

In the water supply state, the head 5 of the air / water supply button 43
6 is a step 11 between the check valve 115 and the air / water supply cylinder 32
By pushing downward until the stroke is regulated by 4, the air / water feeding piston 37 moves the spring 60.
It is pushed down against. Air / water supply piston 37
The packing 104 also moves downward, the protrusion 112 passes through the opening of the communication hole 107, and the communication hole 106 to which the water supply tube 31 is connected and the communication hole 107 to which the water supply relay tube 82 is connected are inserted to establish a water supply state. Become. That is, the air sent into the pressurized air supply conduit 23 by the air supply pump (not shown) reaches the water supply tank 29, and the cleaning water is pressurized. This cleaning water passes through the water supply tube 31 of the connector side water supply conduit 22 and in the air supply and water supply cylinder 32 along the arrow C through the water supply relay tube 82, the tip side water supply conduit 14, the common conduit 15, and the injection nozzle 16. Water is sent.

Further, the air / water supply unit 79 is detached from the operation section 2 at the time of cleaning, and the air supply tube 30 and the water supply tube 3 are provided.
1. Remove the air / air relay tube 81 and the water / water relay tube 82, and remove the air / water feeding piston 37 from the air / water feeding cylinder 32 fixed to the outer wall 94, and perform ultrasonic cleaning or the like.

Next, the structure of the suction unit 80 will be described with reference to FIGS. The suction cylinder 44 is formed of a resin such as PSF or modified PPO as a substantially cylindrical body having open upper and lower ends and a large inner diameter at the upper and lower ends and other small inner diameters. A communication hole 117 is opened in the inner peripheral wall of the suction cylinder 44 on which a connector-side suction projection 116 to which the suction tube 26 is detachable is provided. Further, a distal end side suction projection 118 to which the suction relay tube 86 can be attached / detached is projected at a position opposed to the opening of the communication hole 117 on the circumference, and the communication hole 119 is similarly opened.

The suction cylinder 44 is removably inserted into the outer wall portion 33 of the operating portion 2, but is cut into the outer wall portion 33 at positions corresponding to the connector side suction projection 116 and the tip side suction projection 118, respectively. The notches 121 and 122 are provided so that the suction tube 26 and the suction relay tube 86 can be detachably connected, respectively, and the air / water feeding cylinder 4 can be provided.
4 is positioned with respect to the outer wall portion 33 in the axial direction and the circumferential direction.

The suction cylinder 44 has a suction piston 47 formed of a resin such as PSF or modified PPO.
4 and 5 of the first embodiment, the locking pin 46 and the groove 48, and the projection of the sleeve portion 57 that fits into the vertical groove 134 provided in the suction piston 47. 85
Thus, the suction piston 47 is circumferentially positioned with respect to the suction cylinder 44, and the stroke of the suction piston 47 in the standby state is restricted.

The bamboo shoot spring 50 interposed between the head portion 69 of the suction button 49 provided on the suction piston 47 and the sleeve 57 urges the suction piston 47 upward.

In the suction piston 47, a vertical groove 73 is provided up to the lower end of the suction piston 47 so that only the opening of the communication hole 117 communicates with the lower end opening of the suction cylinder 47 in the standby state, and at the same time, the communication hole 119 is closed. It fits in the suction cylinder 44 up to the length.

Further, in the suction state, the suction piston 4 corresponding to the opening of the communication hole 117 and the opening of the communication hole 119.
A through hole 51 connecting the seven positions is provided. At the lower end opening of the suction cylinder 44, the check valve 5 is provided as in the first embodiment.
2 is adhesively fixed, leaks the connector-side suction conduit 18 and the outside air, and at the same time, prevents the suction unit 80 from coming off easily from the operating portion 2 and the outer wall portion 33 of the operating portion 2.
Is fitted to.

Suction unit 80 constructed as described above
The action of will be explained. As shown in FIG. 20, when the suction unit 27 is operated in the standby state, the suction tube 26 and the suction relay tube 86 are blocked by the suction piston 47, so that the suction force acting on the suction tube 26 causes the suction tube 26 to move in the reverse direction along arrow A. The outside air is sucked through the leak hole of the stop valve 52. Therefore, the body fluid or the like in the body cavity is not sucked.

In the suction state as shown in FIG. 21, the suction button 49 is pushed downward until the stroke is restricted by the locking projection 120 and the groove 48, so that the suction piston 47 moves downward against the bamboo shoot spring 50. The suction tube 26 and the suction relay tube 86 are communicated with each other through the through hole 51, so that the suction force acting on the suction tube 26 is opened along the arrow B at the distal end side of the endoscope 1 toward the distal end. It acts on 12 to suck body fluid and the like in the body cavity.

When the suction unit 80 is washed, the suction cylinder 44 and the suction piston 47 are attached to the suction cylinder 4.
Remove from 4 and wash with an ultrasonic washing machine. The inner peripheral wall of the suction cylinder 44, the connector side suction pipe line 18 and the tip side suction pipe line are respectively filled with a cleaning liquid and washed with a brush or the like.

Next, the structure of the connector portion 5 will be described with reference to FIG. The end portion 123 of the connector portion 5 has a substantially cylindrical shape, and the ride guide mouthpiece 75 of the ride guide 7 projects at a position offset from the central axis 124 of this end portion by a certain distance. A C ring 77 is inserted coaxially with the central axis 124 behind the end face of the end of the connector section 5, and a central axis 127 is located behind the central axis 124 via a coupling section 125 at a position offset by a certain distance. The connector main body 126 and the universal cord 4 are connected.

At the end portion 123 of the connector portion 5, an air supply mouthpiece insertion hole 128 is provided at a position offset from the central shaft 124 by a certain distance in a direction opposite to the light guide mouthpiece 75.
Has penetrated. An air supply mouthpiece 25 to which the pressurized air supply pipe line 23 is connected is fitted into the air supply mouthpiece insertion hole 128, and is locked by a C ring 129 inserted into the air supply mouthpiece 25. Further, the above connector portion 5 is connected to the light source device 6, supplies illumination light to the end face of the light guide 7 of the light guide mouthpiece 15, and supplies air to the pressurized air supply pipe line 23 connected to the air supply mouthpiece 25, which is not shown. Air is delivered from the pump.

In the third embodiment as described above, in order to make the air / water supply unit 79 attachable / detachable to / from the operating portion 2, the air / water feed control tube 20 is connected to the air / air supply relay tube 81, one end of which is detachably connected. Since the other end of the water supply relay tube 82 can be attached to and detached from the relay cap 85 provided near the tip end of the grip portion 83, which is cut along the groove 84 provided in the grip portion 83 of the operation portion 2. Not only does the two tubes not interfere with the hand when gripping the grip portion 83, but also the relay mouthpiece 85 does not need to consider the interference with the hand, so that it protrudes to the outside for easy cleaning. Moreover, since most of the conduits are detachable, it is possible to reduce the time and effort required for washing the endoscope 1 after attachment and detachment.

Here, the air / water feeding cylinder 32 of the air / water feeding unit 79 is connected to the tip side air feeding conduit 13 and the tip side water feeding conduit 14 by connecting the water feeding unit 79 to the outer wall portion of the operating portion 2 as shown in FIG. 33, the tapered tip side air supply projection 98 and the tip side water supply projection 97 form the outer wall 3
When the tip side air supply conduit 14 and the tip side water supply conduit 15 which are respectively projected from 3 are pressed and contacted to be connected, in addition to the above-described effect, the connection is made to the outer wall portion 33 of the operation part 2 of the air supply and water supply unit 79. It can be completed in one action.

Further, the water supply tube 31, the air supply tube 30, the relay tube 89 and the suction tube 26 at both ends are detachably connected to the fixing groove 54 provided in the outer wall portion 33 of the operation portion 2, and the flange portion 91 is provided near both ends. 90 with a pipe
Since the three pipes are fitted and fixed, the three pipes can be fixed without being displaced, and at the same time, the tube and the pipe are divided to facilitate washing.

The same effect as this is obtained by connecting one end of the bending pipe 130 formed of a resin having elasticity such as polyethylene to the connector side suction projection 116 and connecting the suction tube 26 to the other end as shown in FIG. The bent pipe 1
It can also be obtained by inserting the body portion of 30 into the fixing groove 54.

Further, in the air / water supply unit 79, after the air / water supply cylinder 32 and the air / water supply piston 37 are ultrasonically cleaned at the time of cleaning, the material is molded with PSF or modified PPO, and therefore disinfected by an autoclave. Since it is possible, disinfection can be done reliably. Since the connector-side air supply projection 95 and the connector-side water supply projection 96 of the air / water supply piston 37 are projected obliquely downward, when the air supply tube 30 and the water supply tube 31 are connected to each other, there is no problem in the upper direction of the fixing groove 54. Book tubes can be connected.

Further, in the suction unit 80, when the brush is washed from the upper and lower ends on the inner peripheral wall of the suction cylinder 44, there is no place where the brush does not come into contact, so that the washing time is shortened and, like the air / water feeding unit 79, Suction unit 80
Disinfection can be surely done with an autoclave. Since the hole in which the suction unit 80 is fitted is also a simple cylinder, the washing time can be saved.

Further, since the central axis 124 and the central axis 127 are offset by a certain distance in the connector portion 5, the air supply mouthpiece 25 can be inserted straight into the air supply mouthpiece insertion hole 128, and only the air supply mouthpiece 25 can be inserted. Sampling and cleaning are possible.

25 and 26 show the fourth embodiment. In this embodiment, the check valve 53 does not exist at the lower end opening of the suction cylinder 44, and the suction piston 47 and the suction cylinder 44 are
Since the locking method is different, the other configurations are the same as those of the first embodiment.

The upper end opening of the suction cylinder 44 projects from the operating portion 2, and some vertical grooves 13 are formed on the outer circumference of this projecting portion.
6 is provided. A suction button 49 formed of an elastic material is fixed to the upper end of the suction piston 47,
A peripheral portion of the suction button 49 extends downward, and a plurality of protrusions 137 that fit into the vertical groove 136 are provided on the inner periphery of the end portion thereof.

The suction piston 47 is connected to the suction cylinder 44.
Since the suction button 49 is an elastic member, the projection 137 rides over the end of the suction cylinder 44 and is fitted into the vertical groove 136 when it is inserted into. At this time, the bamboo piston spring 50 interposed between the suction button 49 and the suction cylinder 44 urges the suction piston 47 upward.

The vertical groove 136 and the projection 137 position the suction piston 47 and the suction cylinder 44 in the circumferential direction, and regulate the stroke of the suction piston 47 in the standby state and the suction state.

The operation of the fourth embodiment constructed as described above is substantially the same as that of the first embodiment. The first effect
In addition to the effect of the embodiment described above, since the lower end of the suction cylinder 44 is opened, the water drainage at the time of washing is improved and the washing time is shortened, and the vertical piston 136 and the projection 137 position the suction piston 47 and the suction cylinder 44. Since the stroke is regulated, the number of parts is reduced and it can be manufactured at low cost.

Although not shown in the fifth embodiment, in the first embodiment, the check valve 52 is provided at the lower end opening of the suction cylinder 44.
The operation is similar to that of the first embodiment with the configuration in which the is detachable. As the effect of the fifth embodiment, in addition to the effect of the first embodiment, since the lower end of the suction cylinder 44 is opened, the drainage of water at the time of washing is improved and the washing time is shortened. By 52, it is possible to prevent scattering of dirt such as body fluid in the body cavity through the lower end opening of the suction cylinder 44.

FIG. 27 shows a sixth embodiment. In the first embodiment, the suction cylinder 44 has a small inner diameter at the upper end and a large inner diameter at the lower end, and the operation is the same as in the first embodiment.

The effect of this embodiment is the same as that of the first embodiment except that there is no portion that the brush does not touch when washing from the lower end with the brush. FIG. 28 shows a seventh embodiment. In the first embodiment, the suction cylinder 44 has a large inner diameter at the upper end, a middle diameter at the middle portion, and a small inner diameter at the lower end, and the operation is the same as in the first embodiment.

The effect of this embodiment is the same as that of the first embodiment except that there is no part that the brush does not touch when washing with a brush from the upper end. FIG. 29 shows an eighth embodiment. In the fourth embodiment, the suction cylinder 44
The operation is the same as that of the fourth embodiment when the inner diameter of the upper end is small, the inner diameter of the middle step portion is medium, and the inner diameter of the lower end is large.
The effect of the present embodiment is that the fourth embodiment is the same as the fourth embodiment, except that there is no part that the brush does not contact when washing with the brush from the lower end.
It is similar to the embodiment of.

[0121]

As described above, according to the present invention,
The inner wall of the suction cylinder has an arbitrary cross section passing through its central axis,
Since it is formed on the inner wall without a recess perpendicular to the central axis,
There is no part that the brush does not touch, and it has the effect that you can surely wash in a short time.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an endoscope showing a first embodiment of the present invention.

FIG. 2 is a perspective view of an air / water feeding piston of the same embodiment.

FIG. 3 is a vertical sectional side view of the air / water supply control device according to the embodiment.

FIG. 4 is a sectional view of the suction control device of the embodiment in a standby state.

FIG. 5 is a sectional view of the suction control device of the embodiment in a suction state.

FIG. 6 is a perspective view of a main part of the suction piston of the embodiment, broken away.

FIG. 7 is a schematic configuration diagram of an endoscope showing a second embodiment of the present invention.

FIG. 8 is a perspective view of the endoscope operation section of the embodiment.

FIG. 9 is a vertical sectional side view of the air / water supply control device of the embodiment.

FIG. 10 is a sectional view of a packing portion of the air / water feeding piston of the embodiment.

FIG. 11 is a cross-sectional view of the connecting portion of each of the air and water supply and suction pipe lines of the embodiment.

FIG. 12 is a sectional view of the suction control device of the embodiment in a standby state.

FIG. 13 is a sectional view of the suction control device of the embodiment in a suction state.

FIG. 14 is a perspective view of a connector portion of the embodiment.

FIG. 15 is a schematic configuration diagram of an endoscope showing a third embodiment of the present invention.

FIG. 16 is a perspective view of the endoscope operation section of the embodiment.

FIG. 17 is a perspective view of the air supply connector and the connector portion of the embodiment.

FIG. 18 is a vertical sectional side view of the air / water supply control device of the embodiment.

FIG. 19 is an operation explanatory view of another air / water supply control device of the embodiment.

FIG. 20 is a sectional view of the suction control device of the embodiment in a standby state.

FIG. 21 is a sectional view of the suction control device of the embodiment in a suction state.

FIG. 22 is a cross-sectional view of an essential part in which each tube for air supply, water supply, and suction is connected to the operation part of the embodiment.

23 is a cross-sectional view taken along line XX of FIG.

FIG. 24 is a method for supplying air and water to the operation unit according to another method of the embodiment.
FIG. 6 is a cross-sectional view of another main part to which each suction tube is connected.

FIG. 25 is a perspective view of a suction control device showing a fifth embodiment of the present invention.

FIG. 26 is a vertical sectional side view of the suction control device according to the embodiment.

FIG. 27 is a vertical sectional side view of the suction control device showing the fifth embodiment of the present invention.

FIG. 28 is a vertical cross-sectional side view of the suction control device showing the sixth embodiment of the present invention.

FIG. 29 is a vertical sectional side view of a suction control device showing a seventh embodiment of the present invention.

30 (a) to (c) are vertical side views of a conventional suction control device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Endoscope 2 ... Operation part 3 ... Insertion part 17 ... Suction control device 44 ... Suction cylinder 47 ... Suction piston

[Procedure amendment]

[Submission date] August 26, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0005

[Correction method] Change

[Correction content]

Therefore, the one described in Japanese Utility Model Laid-Open No. 54-115790 is known as a suction control device having improved cleaning performance. According to the above conventional technique, FIG.
As shown in the sectional view of the suction control device in (a), both ends of the suction cylinder 151 are open, and the tip side communicating with the suction port of the tip of the endoscope (not shown) is provided above the inner peripheral surface of the suction cylinder 151. A connector-side suction conduit 153 communicating with a suction pump (not shown) is opened below the suction conduit 152.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0023

[Correction method] Change

[Correction content]

Further, the connector- side air supply conduit 21 is connected to the air supply mouthpiece 25 at the end of the connector portion 5 and opens.
When the connector portion 5 is connected to the light source device 6, air is sent to the connector-side air supply conduit 21 from an air supply pump (not shown). At this time, the conduit resistance from the branch portion of the pressurized air supply conduit 23 of the connector-side air supply conduit 21 to the air supply cap 25 and the conduit resistance of the pressurized air supply conduit 23 are the orifices (not shown) at the openings of the respective caps. Resistance portions are provided so as to be equal to each other, and when the endoscope 1 is washed, the air / water supply device 2
An equal flow rate is obtained when a cleaning liquid or the like is injected from 0.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0032

[Correction method] Change

[Correction content]

In the air supply state, the air supplied in the same manner enters the air supply / water supply cylinder 32, but if the leak hole 40 is closed with a finger here, the check valve portion 35 and the tip end along the arrow B are shown. Air is sent through the side air supply pipe line 13, the common pipe line 15, and the injection nozzle 16.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0036

[Correction method] Change

[Correction content]

Next, referring to FIGS . 4 to 6 , the suction control device 1 will be described.
The structure of No. 7 will be described. The suction cylinder 44 has a substantially cylindrical shape with open upper and lower ends, a large inner diameter at the upper end, and a small inner diameter at the lower end. The upper end is sealed to the outer wall portion 33 of the operating portion 2 by the O-ring 139 and screwed by the mounting ring 45. It is fixed.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0038

[Correction method] Change

[Correction content]

The suction cylinder 44 has a suction piston 4
7 are inserted, abutting the locking pin hook-shaped groove 48 is provided on the inner peripheral wall of the substantially cylindrical and the sleeve portion 57 of the suction button 49 on the flange portion of the suction piston 47 The suction cylinder 44 and the suction piston 47 are circumferentially positioned by the projection 135 of the sleeve 57, into which the suction cylinder 46 is inserted and which is fitted in the vertical groove 134 provided in the suction piston 47, and the suction piston 47 is on standby. While the strokes of the suction state and the suction state are regulated, the suction piston 47 is moved upward by the bamboo shoot spring 50 interposed between the head portion 56 of the suction button 49 provided on the upper portion of the suction piston 47 and the sleeve portion 57. Be urged by.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0050

[Correction method] Change

[Correction content]

Universal cord 4 is provided at the other end of the three conduits.
The connector-side suction pipe line 18 is detachably connected to the suction tube 26 via the relay member 55 fitted to the suction pipe 26 and communicates with the suction pump 27. The connector-side air supply pipe line 21 is connected to the air supply tube 30 and the connector-side supply pipe 30. The water conduit 22 is a water supply tube 31
Are removably connected to the water supply tank 29.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0055

[Correction method] Change

[Correction content]

The air / water feeding pistons 37 have smaller outer diameters at the corresponding positions than the inner circumference of the sleeve portion 57 and the inner circumference of the air / water feeding cylinder 32, and are located at positions corresponding to the openings of the connector-side air feeding pipeline 21. It has a through hole 61 in the diametrical direction. A packing 62 and a packing 62 are provided above and below the through hole 61, respectively.
63 is fitted, and the packing 64 is also fitted near the upper part of the flange 59. The three packings 62, 63,
Reference numeral 64 slides on the inner circumference of the sleeve portion 57 and seals fluid (cleaning liquid, air, etc.).

[Procedure Amendment 8]

[Document name to be amended] Statement

[Name of item to be corrected] 0057

[Correction method] Change

[Correction content]

Further, the air / water feeding piston 37 has a check valve 66.
More has a through hole 67 in the diameter direction downward, the packing 6 8 is fitted at its bottom. Above 5 packings 6
When the 2, 63, 64, 65, 68 and the check valve 66 are fitted to the air / water feeding piston 37, a silicone adhesive is filled in the gap. A leak hole 40 penetrates and opens from the through hole 67 to the upper end of the air / water feeding piston 37.

[Procedure Amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0063

[Correction method] Change

[Correction content]

[0063] Also, air and water supply piston 37, air and water supply button 43 is Ri sampling from air water cylinder 32 during cleaning
Connector-side feed conduit 21, to remove the respective tube connector side water supply conduit 22 performs cleaning by ultrasonic cleaning or the like. Further, the air / water feeding cylinder 37 is washed with a dedicated brush.

[Procedure Amendment 10]

[Document name to be amended] Statement

[Correction target item name] 0064

[Correction method] Change

[Correction content]

Next, the structure of the suction control device will be described with reference to FIGS. Suction cylinder 44 is open at the top and bottom ends, a substantially cylindrical no step due to inner diameters of the inner circumferential wall, screwed in the first embodiment similarly mounted ring 45 to the outer wall 33 of the operating unit 2 to the upper end Has been done. The distal suction pipe line 12 is connected to the peripheral wall of the suction cylinder 44 from a diagonally lower side through a connection pipe 138 and opens.

[Procedure Amendment 11]

[Document name to be amended] Statement

[Correction target item name] 0065

[Correction method] Change

[Correction content]

The suction cylinder 44 has a suction piston 4
7 is inserted, and the locking pin 46 and the hook-shaped groove 48 (both not shown) as in FIGS. 4 and 5 of the first embodiment.
Further, the protrusion 135 of the sleeve portion 71 fitted into the vertical groove 134 provided in the suction piston 47 is positioned on the circumference, and the standby state, the suction state and the stroke of the suction piston 47 are restricted.

[Procedure Amendment 12]

[Document name to be amended] Statement

[Correction target item name] 0066

[Correction method] Change

[Correction content]

[0066] Also, interposed and the sleeve portion 71 of the suction button 49 having a flange portion 70 on the inner peripheral upper end by a head and a substantially cylindrical suction button 49 that is screwed to the upper end of the suction piston 47 The bamboo shoot spring 50 urges the suction piston 47 upward. Also, the suction button 49
The sleeve portion 71 is connector-side suction channel 18 are freely connected to opening detachably.

[Procedure Amendment 13]

[Document name to be amended] Statement

[Correction target item name] 0067

[Correction method] Change

[Correction content]

The suction piston 47 is provided with a vertical groove 73 up to the lower end of the suction piston 47 so that only the connector side suction pipeline 18 communicates with the lower end opening of the suction cylinder 44 in the standby state. It is fitted to the suction cylinder 44 up to the length so as to block. The suction piston 47 corresponding to the opening of the opening and the distal end side suction channel 12 of the connector-side suction channel 18 in the attraction state
A through hole 51 connecting the positions is provided. A check valve 52 is adhesively fixed to the lower end opening of the suction cylinder 44 in the same manner as in the first embodiment, thereby leaking the connector side suction conduit 18 and the outside air.

[Procedure Amendment 14]

[Document name to be amended] Statement

[Correction target item name] 0069

[Correction method] Change

[Correction content]

In the suction state as shown in FIG. 13, the suction button 49 is connected to the vertical groove 134 of the suction piston 47 and the projection 135.
The suction piston 47 is pushed downward against the bamboo shoot spring 50 by pushing the suction piston 47 downward until the stroke is regulated, and the connector-side suction conduit 18 and the tip-side suction conduit 12 are communicated by the through hole 51. Therefore, the suction force acting on the connector side suction conduit 18 acts on the tip side suction conduit 12 opened at the tip of the endoscope 1 along the arrow B to suck body fluid and the like in the body cavity. .

[Procedure Amendment 15]

[Document name to be amended] Statement

[Name of item to be corrected] 0070

[Correction method] Change

[Correction content]

When the suction control device 17 is washed,
The suction piston 47 and the suction button 49 are connected to the suction cylinder 44.
Remove more and wash with an ultrasonic washing machine. Suction cylinder 4
The inner peripheral wall of 4, the connector side suction pipeline 18 and the tip side suction pipeline are respectively injected with a cleaning liquid or the like and washed with a brush or the like.

[Procedure Amendment 16]

[Document name to be amended] Statement

[Correction target item name] 0076

[Correction method] Change

[Correction content]

As in the first embodiment, the suction control device 17 has a simple structure, which not only saves the labor at the time of washing, but also causes the connector-side suction conduit 18 to be fixed in the fixing groove 54 of the operating portion 2.
Since it is fixed to the tube, the tube will not come apart. Further, since the connector-side suction conduit 18 is removable, it can be replaced. In the air supply adapter 53, not only the branch portion does not exist in the connector portion 5 as in the conventional case, but also the endoscope 1
Since it can be ultrasonically cleaned as a separate body, the labor required for cleaning is greatly reduced.

[Procedure Amendment 17]

[Document name to be amended] Statement

[Correction target item name] 0077

[Correction method] Change

[Correction content]

15 to 24 show the third embodiment, and FIG.
5 is a schematic configuration diagram of the endoscope, FIG. 16 is a perspective view of the endoscope operation section, FIG. 17 is a perspective view of the air supply connector and the connector section, and FIG. 18 is a vertical side view of the air supply / water supply control device. 19 is a vertical sectional side view of another air / water supply control device, FIG. 20 is a cross-sectional view of the suction control device in a standby state, FIG. 21 is a cross-sectional view of the suction control device in a suction state, and FIG. , A cross-sectional view of the main part where the suction tubes are connected, and FIG. 23 is taken along line XX of FIG.
24 is a sectional view taken along the line of FIG.
It is a principal part sectional view which connected each suction tube.

[Procedure 18]

[Document name to be amended] Statement

[Correction target item name] 0078

[Correction method] Change

[Correction content]

As shown in FIG. 15, the endoscope 1 according to the present embodiment.
Is a schematic configuration and is different from the second embodiment in the air / water control device 20.
Suction unit 80 and the air and water supply unit 79 showing an entire showing the entire suction control device 17, except that it detachable from the operation unit 2 approximately equal, approximately equal even act as the endoscope 1.

[Procedure Amendment 19]

[Document name to be amended] Statement

[Correction target item name] 0080

[Correction method] Change

[Correction content]

Similarly, the other end of the suction relay tube 86, one end of which is detachably connected to the suction control device 17 so that the suction unit 80 can be attached and detached from the operating portion 2, is connected to the side portion of the forceps plug 87. The forceps plug 87 is connected to the tip-side suction conduit 12 via a forceps port 133 provided near the tip-side end of the grip portion 83.

[Procedure amendment 20]

[Document name to be amended] Statement

[Correction target item name] 0082

[Correction method] Change

[Correction content]

At the same time, the suction control device 17 is shown in FIG.
One end of the relay tube 89 of the connector-side suction channel 18 is detachably connected to the other end is connected to one end of a pipe 90 having a flange portion 91 respectively in the vicinity of both end portions. The pipe 90 sandwiches both ends of the fixed groove 54 with two flange portions 91 and is fitted into the fixed groove 54. The suction tube 26 is detachably connected to the suction pump 27 at the other end of the pipe 90.

[Procedure correction 21]

[Document name to be amended] Statement

[Name of item to be corrected] 0083

[Correction method] Change

[Correction content]

Further , as shown in FIG. 25, the fixing groove 54
First, the water supply tube 31 and the air supply tube 30 are pushed in, and then the pipe 90 is fitted. The operation unit 2 configured as described above detaches the air / water supply unit 79 and the suction unit 80 from the operation unit 2 at the time of cleaning, and also pulls out the respective tubes and pipes to perform cleaning individually.

[Procedure correction 22]

[Document name to be amended] Statement

[Correction target item name] 0092

[Correction method] Change

[Correction content]

In the water supply state, the head 5 of the air / water supply button 43
6 is a step 11 between the check valve 115 and the air / water supply cylinder 32
By pushing downward until the stroke is regulated by 4, the air / water feeding piston 37 moves the spring 60.
It is pushed down against. Air / water supply piston 37
Packing 104 also moves downward, the projection 112 passes through the opening of the communication hole 107, communication hole 107 connected to the connected communication hole 106 and the water supply relay tube 82 of the water supply tube 31 is communicated with the water supply condition Become. That is, the air sent into the pressurized air supply conduit 23 by the air supply pump (not shown) reaches the water supply tank 29, and the cleaning water is pressurized. This cleaning water passes through the water supply tube 31 of the connector side water supply conduit 22 and in the air supply and water supply cylinder 32 along the arrow C through the water supply relay tube 82, the tip side water supply conduit 14, the common conduit 15, and the injection nozzle 16. Water is sent.

[Procedure amendment 23]

[Document name to be amended] Statement

[Correction target item name] 0094

[Correction method] Change

[Correction content]

Next, the structure of the suction unit 80 will be described with reference to FIGS. Suction cylinder 44 is open at upper and lower ends, the inner diameter of the upper and lower ends and other internal diameter large diameter is molded by resin such as PSF and modified PPO as a substantially cylindrical small diameter, the peripheral wall of the connector-side suction channel 18 Relay tube
A communication hole 117 is opened in the inner peripheral wall of the suction cylinder 44 on which a connector-side suction protrusion 116 is detachably attached. Further, a distal end side suction projection 118 to which the suction relay tube 86 can be attached / detached is projected at a position opposed to the opening of the communication hole 117 on the circumference, and the communication hole 119 is similarly opened.

[Procedure correction 24]

[Document name to be amended] Statement

[Correction target item name] 0095

[Correction method] Change

[Correction content]

The suction cylinder 44 is removably inserted into the outer wall portion 33 of the operating portion 2, but is cut into the outer wall portion 33 at positions corresponding to the connector side suction projection 116 and the tip side suction projection 118, respectively. By providing the notches 121 and 122, the relay tube 89 and the suction relay tube 86 can be detachably connected, respectively, and the air / water feeding cylinder 4
4 is positioned with respect to the outer wall portion 33 in the axial direction and the circumferential direction.

[Procedure correction 25]

[Document name to be amended] Statement

[Correction target item name] 0096

[Correction method] Change

[Correction content]

The suction cylinder 44 has a suction piston 47 formed of a resin such as PSF or modified PPO.
Is inserted in the same manner as in FIGS. 4 and 5 of the first embodiment.
It was fixed by screwing near the upper end of the suction cylinder 44.
Inner circumference of the locking pin 46 and the sleeve portion 57 of the suction button 49
The suction piston 47 is circumferentially positioned with respect to the suction cylinder 44 by the projections 135 of the sleeve portion 57 of the suction button 49 that fits into the groove 48 provided in the wall and the vertical groove 134 provided in the suction piston 47. Thus, the stroke of the suction piston 47 in the standby state is regulated.

[Procedure Amendment 26]

[Document name to be amended] Statement

[Correction target item name] 0097

[Correction method] Change

[Correction content]

Further, the bamboo shoot spring 50 interposed between the head portion 56 of the suction button 49 provided on the suction piston 47 and the sleeve portion 57 urges the suction piston 47 upward.

[Procedure Amendment 27]

[Document name to be amended] Statement

[Correction target item name] 0100

[Correction method] Change

[Correction content]

Suction unit 80 constructed as described above
The action of will be explained. As shown in FIG. 20, when the suction unit 27 is operated in the standby state, the relay tube 89 and the suction relay tube 86 are blocked by the suction piston 47, so that the suction force acting on the relay tube 89 causes the suction tube 27 to move in the reverse direction along arrow A. The outside air is sucked through the leak hole of the stop valve 52. Therefore, the body fluid or the like in the body cavity is not sucked.

[Procedure correction 28]

[Document name to be amended] Statement

[Correction target item name] 0101

[Correction method] Change

[Correction content]

As shown in FIG. 21, in the suction state, the suction button 49 is pushed downward until the stroke is restricted by the projection 135 and the vertical groove 134 , so that the suction piston 47 moves downward against the bamboo shoot spring 50. Since the relay tube 89 and the suction relay tube 86 are pushed down and communicate with each other through the through hole 51, the suction force acting on the relay tube 89 is opened along the arrow B at the distal end side suction conduit 12 that opens to the distal end of the endoscope 1. And acts to suck body fluid and the like in the body cavity.

[Procedure correction 29]

[Document name to be amended] Statement

[Correction target item name] 0103

[Correction method] Change

[Correction content]

Next, the structure of the connector portion 5 will be described with reference to FIG. The end 123 of the connector portion 5 has a substantially cylindrical shape, and the ride guide mouthpiece 74 of the ride guide 7 projects at a position offset from the central axis 124 of this end by a certain distance. A C ring 77 is inserted coaxially with the central axis 124 behind the end face of the end of the connector section 5, and a central axis 127 is located behind the central axis 124 via a coupling section 125 at a position offset by a certain distance. The connector main body 126 and the universal cord 4 are connected.

[Procedure amendment 30]

[Document name to be amended] Statement

[Correction target item name] 0104

[Correction method] Change

[Correction content]

The end portion 123 of the connector portion 5 is provided with an air supply mouthpiece insertion hole 128 at a position offset from the central shaft 124 by a certain distance in the direction opposite to the light guide mouthpiece 74.
Has penetrated. An air supply mouthpiece 25 to which the pressurized air supply pipe line 23 is connected is fitted into the air supply mouthpiece insertion hole 128, and is locked by a C ring 129 inserted into the air supply mouthpiece 25. Further, the above connector portion 5 is connected to the light source device 6, supplies illumination light to the end face of the light guide 7 of the light guide mouthpiece 74 , and supplies air to the pressurized air supply conduit 23 connected to the air supply mouthpiece 25, which is not shown. Air is delivered from the pump.

[Procedure correction 31]

[Document name to be amended] Statement

[Correction target item name] 0105

[Correction method] Change

[Correction content]

In the third embodiment as described above, the air / water supply tube 79 is detachably connected to the air / water supply control device 20 in order to make the air / water supply unit 79 detachable from the operation section 2. Connect the other end of the water feed relay tube 82 to the operation unit 2
Since it can be attached to and detached from the relay cap 85 provided near the tip end of the grip portion 83, which is wound along the groove 84 provided in the grip portion 83, Not only does the tube of the book not interfere with the hand, but the relay mouthpiece 85 does not have to consider the interference of the hand, so that it protrudes to the outside for easy cleaning. Moreover, since most of the conduits are detachable, it is possible to reduce the time and effort required for washing the endoscope 1 after attachment and detachment.

[Procedure correction 32]

[Document name to be amended] Statement

[Correction target item name] 0108

[Correction method] Change

[Correction content]

The same effect as this is obtained by connecting one end of the bending pipe 130 formed of a resin having elasticity such as polyethylene to the connector side suction projection 116 and connecting the suction tube 26 to the other end as shown in FIG. The bent pipe 1
It can also be obtained by inserting the body 131 of 30 into the fixing groove 54.

[Procedure amendment 33]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 4

[Correction method] Change

[Correction content]

[Figure 4]

[Procedure amendment 34]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

[Figure 5]

[Procedure amendment 35]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 6

[Correction method] Change

[Correction content]

[Figure 6]

[Procedure correction 36]

[Document name to be corrected] Drawing

[Correction target item name] Figure 9

[Correction method] Change

[Correction content]

[Figure 9]

[Procedure amendment 37]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 12

[Correction method] Change

[Correction content]

[Fig. 12]

[Procedure amendment 38]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 13

[Correction method] Change

[Correction content]

[Fig. 13]

[Procedure amendment 39]

[Document name to be corrected] Drawing

[Correction target item name] Fig. 16

[Correction method] Change

[Correction content]

FIG. 16

[Procedure amendment 40]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 20

[Correction method] Change

[Correction content]

FIG. 20

[Procedure Amendment 41]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 21

[Correction method] Change

[Correction content]

FIG. 21

[Procedure amendment 42]

[Document name to be corrected] Drawing

[Correction target item name] Fig. 27

[Correction method] Change

[Correction content]

FIG. 27

[Procedure amendment 43]

[Document name to be corrected] Drawing

[Correction target item name] Fig. 28

[Correction method] Change

[Correction content]

FIG. 28

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Masaaki Nakazawa 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd. (72) Hisao Yabe 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd.

Claims (1)

[Claims] 1. A pair of connection ports, which are connected to a suction pipe line that opens at the tip of the insertion portion of an endoscope and a suction pipe line that communicates with a suction source, are provided on the outer circumference of a cylinder, and the lower end thereof has a communication passage with the outside air. In a suction control device of an endoscope, which comprises a cylinder having a, and a piston which is inserted into the cylinder and which forms a passage communicating with the pair of connection ports, and which controls suction of the suction pipe line, the cylinder is A suction control device for an endoscope, which has an inner wall without a recess perpendicular to the central axis in an arbitrary cross section passing through the central axis.