JPS6241013B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water supply device for an endoscope, in which a jet nozzle for cleaning an observation window and a spout for spraying liquid on an affected area are independently provided in the distal end portion of the endoscope.

A water supply system for an endoscope, in which the distal end of the endoscope is provided with a spout nozzle for cleaning body fluids, mucus, etc. adhering to the observation window, and a spout for cleaning the observation area, such as the affected area, and supplying water to the laser ablation site. The device is known. However, in this water supply device, the above-mentioned jet nozzle is connected to the water supply supply device via the main water supply pipe, and the spout is connected to the sub-water supply port which opens into the main body of the operating section via the sub-water supply pipe, and the water supply from the spout is When water is to be supplied, a syringe is inserted into the sub-water supply port, the liquid contained within the syringe is sent to the spout via the sub-water pipe, and water is supplied from the spout. Therefore, it is difficult to vary the water supply pressure from the syringe depending on the observation site, and if water is supplied to a laser ablation site or the like, strong pressure may cause bleeding from the ablation site again.

In addition, Utility Model Application No. 54-107190 discloses an endoscope in which one air/water inlet is provided in the tip component of the endoscope, and the direction of air and water ejected from the air/water inlet can be changed. It is known as a gazette.
This is a device in which a flow path switching piece is provided near the air/water supply port, and by rotating this flow path switching piece, the jetting direction of the gas and liquid ejected from the air/water supply port is changed. Ta. Therefore,
When cleaning the observation site, etc., the amount of water supplied cannot be varied, and water is often supplied strongly to the site that has been laser cauterized, which may cause bleeding from the cauterized site again.

This invention was made in view of the above circumstances, and its purpose is to independently provide a jet nozzle for cleaning the observation window and a jet port for cleaning the affected area;
To provide a water supply device for an endoscope capable of selectively supplying water from a jet nozzle or a spout by a water supply switching device, and also capable of adjusting the water flow rate when water is supplied from the spout.

Hereinafter, the present invention will be explained based on embodiments shown in the drawings. 1 to 5 show a first embodiment, in which 1 is an endoscope. This endoscope 1
It is composed of an operating section main body 2, an insertion section 3, a light guide cable 4, and an eyepiece section 5. The insertion section 3 consists of a flexible tube 6 and a tip structure 7, and the tip surface 8 of the tip structure 7 has an illumination window 9,
Observation window 10 consisting of an objective lens and forceps port 11
is provided. Furthermore, an ejection nozzle 12 and an ejection port 13 are provided near the observation window 10, and the end surface of the ejection nozzle 12 is rounded so as not to damage the mucous membrane in the body cavity. It faces window 10. Further, the jet nozzle 12 is connected to an air pipe 14, and a first water pipe 1 is connected to the middle part of this air pipe 14.
5 is branched. The air pipe 14 is connected to an air/water switching device 16 provided in the operating section main body 2.
It is connected to an air supply pump (not shown) via. Further, the spout 13 is connected to the second water pipe 17
is connected thereto, and is installed inside the insertion section 3 together with the air pipe 14 and the first water pipe 15. On the other hand, a main water pipe 18 connected to an external water supply device (not shown) is connected to a water supply switching device 19, which will be described later, provided inside the operating section main body 2 via an air/water switching device 16. The operating unit main body 2 is connected to the operating unit main body 2 via a branch pipe 20 that branches from the middle part.
It is connected to a sub-water supply port 21 provided in the main body. Also,
This sub-water supply port 21 is provided with a check valve 22 for preventing backflow of water.

The water supply switching device 19 is constructed as shown in FIGS. 3 to 5. That is, 23 is a cylindrical pot body with a tapered inner surface, and a rotating body 24 having a shape corresponding to the tapered surface is rotatably fitted into the pot body 23. This rotary body 24 is supported by a screw 25 penetrating from the bottom of the rotary body 23, and the tapered surfaces of the rotary body 23 and the rotary body 24 are always in close contact with each other so as to be liquid-tight. In addition, Kotoku body 2
A lid 26 is screwed onto the upper opening of the lid 26, and a mounting cylinder 2 having a threaded portion 27 is provided in the center of the lid 26.
8 is provided protrudingly. The mounting tube 28 is inserted into the mounting hole 29 of the operating section main body 2, and the tightening ring 30 is attached to the threaded section 27 from the outside of the operating section main body 2.
It is attached by screwing it on. Furthermore, a handle 31 is provided at the upper part of the rotating body 24 and protrudes to the outside through the mounting tube 28, and an operating knob 32 is fixed to the handle 31.
A through hole 33 is bored in the axial direction of the handle 31, and a threaded portion 34 is formed on a part of the inner peripheral surface of the through hole 33.
is engraved. A flow control valve 35 screwed into the threaded portion 34 is inserted into the through hole 33 in a fluid-tight manner with a seal 36 . The distal end 37 of the flow rate control valve 35 is formed into a conical shape, and an adjustment knob 39 is fixed to the base end 38. The control knob 39 controls the flow rate control valve 35.
By moving forward and backward, the flow rate of water when sending water from the spout 13 can be adjusted.

On the other hand, on the outer circumferential wall of the pot body 23, there are an inlet 40, a first outlet 41, and a second outlet at 120° intervals.
A discharge port 42 is provided. The suction port 40 and the first discharge port 41 are connected to the main body 23.
are the same in the height direction, but the second discharge port 42 is provided at a position one step higher than these. Further, the main water pipe 18 led from the air/water switching device 16 is connected to the inlet 40, the first water pipe 15 is connected to the first outlet 41, and the first water pipe 15 is connected to the second outlet 42. The second water pipes 17 are connected to each other. Further, the rotary body 24 is provided with a first through hole 43 corresponding to the inlet port 40 and a second through hole 44 corresponding to the first discharge port 41, which are located at the center of the rotary body 24. It's communicating. Further, a discharge passage hole 45 corresponding to the second discharge port 42 is provided above the first passage hole 43, and the discharge passage hole 45 is connected to the first passage through a communication passage, for example, a communication hole 46. It communicates with the hole 43. The communication hole 46 also communicates with the through hole 33 in which the flow rate adjustment valve 35 is provided, and the tip end 37 of the flow rate adjustment valve 35 has a corner portion 47 connecting the communication hole 46 and the discharge hole 45.
It can move forward and backward, allowing the flow rate of water to be adjusted.

Next, the operation of the water supply device configured as described above will be explained.

() When bodily fluids, mucus, etc. adhere to the observation window 10 and these are to be cleaned by water supply from the jet nozzle 12, first operate the operation knob 32 of the water supply switching device 19 to rotate the rotating body 24. , as shown in Figure 4,
The first through hole 43 is the inlet port 40, and the second through hole 44 is the inlet port 40.
is made to face the first discharge port 41. At this time, the discharge hole 45 is closed by the inner wall of the pot body 23, and the second discharge port 42 is closed by the outer wall of the rotating body 24, as shown in FIGS. 3 and 5. In this state, when the air and water supply switching device 16 is operated to the water supply side, the water supplied from the water supply device flows through the water supply main pipe 18 to the water supply switching device 19, and the air and water supply switching device 16 is moved from the suction port 40 to the first through hole 43. →Second through hole 4
4→first discharge port 41. moreover,
The water discharged from the first outlet 41 is ejected from the ejection nozzle 12 through the first water pipe 15 toward the observation window 10, and the body fluids and mucus adhering to the observation window 10 are blown away and cleaned. .

() When cleaning an observation site in a body cavity or supplying water to a laser ablation site, first operate the operating knob 32 of the water supply switching device 19 to move the rotating body 24 from the position shown in FIGS. 4 and 5 in the direction of the arrow. When rotated 120°, the discharge hole 45
is opposed to the second discharge hole 42, and the second through hole 44 is opposed to the suction port 40, so that the main water pipe 18 and the second water pipe 17 communicate with each other. At this time, the first through hole 43 is closed by the inner wall of the pot body 23 and the first outlet 4 is closed.
1 is closed by the outer wall of the rotating body 24. In this state, when the air/water supply switching device 16 is operated to the water supply side, the water flowing from the main water supply pipe 18 to the suction port 40 flows through the second passage hole 44 → communication hole 46 → discharge passage hole 45 → second discharge port. It is distributed in the order of 42. Further, the water discharged from the second outlet 42 is transferred to the second water pipe 17.
The water is ejected from the spout 13 through the water to clean the observation site in the body cavity and supply water to the laser ablation site.

In addition, when adjusting the flow rate of water sent from the spout 13, the flow rate control valve 35 moves forward and backward by turning the control knob 39.
Accordingly, the opening degree of the communication portion between the communication hole 46 and the discharge hole 45 can be adjusted. Therefore, the amount of water fed from the spout 13 can be arbitrarily varied depending on the purpose of water feeding.

FIG. 6 and FIG. 7 show a second embodiment, in which the water supply switching device 1 of the Kotsuku method of the first embodiment is shown.
This is a piston system instead of 9. That is, 48 is a cylinder, and a piston 50 having a flange 49 is slidably inserted into the cylinder 48. The upper end of the cylinder 48 has a small diameter portion 5.
1 is provided, and this small diameter portion 51 is provided with a threaded portion 52. This small diameter portion 51 is inserted into the mounting hole 53 of the operating section main body 2, and the small diameter portion 51 is inserted into the mounting hole 53 of the operating section main body 2.
The cylinder 48 is fixed to the operating section main body 2 by screwing the lid 54 onto the threaded section 52 from the outside. Further, the bottom of the cylinder 48 is provided with an inlet 40 connected to the main water supply pipe 18, and the side wall of the cylinder 48 is provided with a first outlet 41 connected to the first water supply pipe 15 and a second discharge port 41 connected to the first water supply pipe 15. A second outlet 42 connected to the water pipe 17 is provided, respectively. On the other hand, O-rings 55, 56, 57, and 58 are attached to the outer circumferential wall of the piston 50 at predetermined intervals in the axial direction for liquid-tightly sealing the inner circumferential wall of the cylinder 48. A notch portion 59 is provided for regulating the stroke of. Also, this piston 5
0 has a communication hole 4 corresponding to the suction port 40.
6 is provided, and furthermore, this communication hole 46 and the second
A through hole 60 communicating with the discharge port 42 is provided. A through hole 33 is provided at the upper end of the piston 50 and extends from the flange 49 to the communication hole 46.
4 is engraved. A flow control valve 35 screwed into the threaded portion 34 is inserted into the through hole 33 in a fluid-tight manner with a seal 36 . The tip end 37 of the flow rate regulating valve 35 can move forward and backward with respect to a corner 47 connecting the communication hole 46 and the through hole 60, so that the flow rate of water being fed from the spout 13 can be adjusted.

Therefore, as shown in FIG. 6, the piston 50
When pushed in, the inlet 40 communicates with the second outlet 42 through the communication hole 46 and the through hole 60, and the water sent from the main water supply pipe 18 is passed through the second water supply pipe 17 to the first embodiment. Similarly, spout 1
Water can be supplied from 3. Of course, at this time, turn the flow rate control valve 35 to adjust its tip 37 to the corner portion 47.
The water flow rate can be adjusted by moving it forward and backward. Further, as shown in FIG. 7, the piston 50
By pulling, the through hole 60 is closed by the inner wall of the cylinder 48, and the first outlet 41 communicates with the inside of the cylinder 48. Therefore, the inlet 4
0 communicates with the first discharge port 41 through the inside of the cylinder 48, and the water sent from the main water pipe 18 is
Water can be fed from the jet nozzle 12 through the water pipe 15 in the same way as in the first embodiment. That is, by pushing and pulling the piston 50, the jet nozzle 12
It is possible to switch between water supply from the outlet and water supply from the spout 13.

FIGS. 8 and 9 show a third embodiment, in which the water supply switching device 19 is constituted by a solenoid valve. That is, 61 is a solenoid valve, which is configured to switch the inflow path 63 to a first outflow path 64 and a second outflow path 65 forming a communication path by turning a switch 62 ON or OFF. . The inflow path 63 communicates with the inlet 40 connected to the main water pipe 18 , the first outflow path 64 communicates with the first outlet 41 connected to the first water pipe 15 , and the second outflow path 64 communicates with the inlet 40 connected to the main water pipe 18 . are in communication with the second water pipe 17, respectively. Furthermore, a flow rate control valve 66 is provided in the middle of the second outflow path 65 .

When the switch 62 is in the OFF state, as shown in FIG. 1. It can be sent out from the jet nozzle 12 in the same way as in the second embodiment. Furthermore, when the switch 62 is turned on, the solenoid valve 61 operates, and the inflow path 63 communicates with the second outflow path 65.
Water sent from the main water pipe 18 can be sent out from the spout 13 via the second water pipe 17 in the same manner as in the first and second embodiments. Further, the water flow rate at this time can be arbitrarily adjusted by the flow rate control valve 66. Note that this flow rate control valve 66 may be a relief valve.

As explained above, this invention has a dispensing nozzle for cleaning the observation window and a spout for cleaning the observation site or affected area in the body cavity, which are independently provided in the tip component, and the main water pipe connected to the water supply device is supplied with water. A switching device enables switching between a first water pipe connected to the jet nozzle and a second water pipe connected to the spout, and a communication path communicating with the second water pipe. Since the flow rate adjusting means is provided in the middle of the water outlet, the flow rate of water fed from the spout can be adjusted as desired depending on the purpose of water feeding. Therefore, for example, when cleaning filth in the stomach, a strong water supply is used to wash it away, and a weak water supply can be applied to the laser cauterized site to prevent bleeding again.

[Brief explanation of the drawing]

1 to 5 show a first embodiment of the present invention, in which FIG. 1 is a perspective view of the entire endoscope, FIG. 2 is a schematic configuration diagram, and FIG. 3 is a vertical cross-section of the water supply switching device. A top view, Figure 4 is a sectional view taken along the line of Figure 3,
5 is a sectional view taken along the line of FIG. 3, FIGS. 6 and 7 are longitudinal sectional views of a water supply switching device showing a second embodiment of the invention, and FIGS. 8 and 9 are sectional views of the invention. It is a schematic block diagram of the water supply switching device which shows the 3rd Example of this. DESCRIPTION OF SYMBOLS 1...Endoscope, 2...Operation unit main body, 7...Tip component, 10...Observation window, 12...Ejection nozzle,
13... spout, 15... first water pipe, 17...
...Second water pipe, 18...Main water pipe, 19...Water switching device, 35, 66...Flow rate control valve (flow rate control means), 46...Communication hole (communication path), 65...Second water pipe Outflow path (communication path).

Claims (1)

[Scope of Claims] 1. A jet nozzle for cleaning the observation window and a spout for spraying liquid on the affected area are independently provided in the distal end component of the endoscope, and a water supply device and a water supply device are provided in the operating section body of the endoscope. A water supply switching device is provided to switch the main water supply pipe to be connected to either a first water pipe connected to the jet nozzle or a second water pipe connected to the spout, and a communication pipe communicating with the second water pipe is provided. A water supply device for an endoscope, characterized in that a flow rate adjustment means is provided in the middle of a passage. 2. The water supply device for an endoscope according to claim 1, wherein the flow rate adjustment means is integrated into the water supply switching device. 3. The water supply device for an endoscope according to claim 1, wherein the flow rate adjustment means is provided separately from the water supply switching device.