JPH0796000B2 - Endoscope device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention operates a water supply means by operating a water supply switch provided on an operation section of an endoscope, and a nozzle provided at a distal end portion of an insertion section. The present invention relates to an endoscope device that can send water.

[Conventional technology]

Generally, the endoscope main body is provided with fluid conduits for air supply, water supply, and suction. Then, the air supply pipe and the water supply pipe merge at the distal end side of the insertion portion of the endoscope, and communicate with a nozzle that opens toward the observation window provided at the distal end, and the observation window has mucus inside. When it is contaminated by dirt or dirt, by sending water from the nozzle toward the observation window,
It is configured so that dirt can be removed.

Therefore, the endoscope apparatus is provided with control means for controlling the switching between the air supply, the water supply, and the suction. This control means is conventionally a mechanical control in which a switching valve provided in the operation portion of the endoscope is directly operated by the operation of fingers, and, for example, as shown in JP-A-56-75131, There is electrical control in which a switch is provided in the operation unit, and the solenoid valve provided in each conduit in the optical power supply device is controlled by operating this switch with fingers. This electrical control system only provides a switch on the operation section of the endoscope, and does not require an air supply valve, a water supply valve, a suction valve, etc. on the operation section unlike the mechanical control method, and the operation section does not need to be installed. It is popular because of its light weight and excellent operability of endoscopes.

[Problems to be solved by the invention]

In the endoscopic device configured as described above, the system of electrically controlling the air supply, the water supply, and the suction is
As shown in FIG. 5 (A), a solenoid valve c is provided in the water supply conduit b inside the optical power supply device a, and this water supply conduit b is provided on the distal end side of the insertion portion e of the endoscope d by the air supply conduit. The length l of the water supply conduit b that joins the passage f and connects the solenoid valve c and the merging portion g is very long, and the mechanical control type is as shown in FIG. 5 (B). In addition, since the operation part h of the endoscope d is provided with the air / water switching valve i, the air / water switching valve i and the confluence part g.
The length l between and is short. Therefore, in the electric control system, even if the water supply conduit b is closed by the solenoid valve c, the water accumulated in the water supply conduit b is restored in an attempt to restore after the water supply conduit b expanded during water supply stops water supply. There is a disadvantage that it is pushed out to the air supply conduit f through the confluence part g and dropped from the nozzle j, and there is a drawback that the water drainage property is poor. This phenomenon also occurs in the case of the mechanical control method, but since the water supply pipe b is closed by the air supply / water supply switching valve i provided in the operating part h, the pipe that expands during water supply, that is, the water supply pipe Due to the short length of the water pipe b, the water drainage does not become a problem.

The present invention has been made in view of the above circumstances, and even with an electrical control system in which the water supply means is controlled by a switch provided in the operation unit, it is possible to eliminate the poor drainability after water supply is stopped. An object is to provide an endoscopic device.

[Means and Actions for Solving Problems]

In the present invention, the water supply means is operated by a closing signal of a water supply switch provided in the operation section of the endoscope, water is supplied to the water supply pipe line and water is supplied from the nozzle toward the observation window. Immediately after the water supply is stopped by the method, a suction means for sucking the water in the water supply pipe for a certain period of time is provided to prevent the water accumulated in the water supply pipe from being pushed out.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show a first embodiment, in which 1 is an endoscope and 2 is a control device such as an optical power supply device. The endoscope 1 includes an operation unit 3, an insertion unit 4, and a universal cord 5. An optical fiber bundle 6 for observation and an optical fiber bundle 7 for illumination are installed in the insertion section 4, and the optical fiber bundle 6 for observation is provided with an observation window 6a provided at a tip portion 8 of the insertion section 4.
In addition, the optical fiber bundles 7 for illumination face the illumination windows 7a, respectively. Further, the tip portion 8 is provided with a nozzle 9 opening toward the observation window 6a and a suction port 10. Further, the insertion portion 4 is internally provided with an air supply pipe line 11, a water supply pipe line 12 and a suction pipe line 13, and the air supply pipe line 11 and the water supply pipe line 12 merge at the tip side of the insertion part 4 to form the nozzle. It communicates with 9. Further, the suction pipe line 13 is the suction port.
It communicates with 10. The air supply conduit 11, the water supply conduit 12, and the suction conduit 13 are connected to the connector 14 via the inside of the universal cord 5, and communicate with the control device 2 via the connector 14. Further, the operation section 3 of the endoscope 1 is provided with an air supply switch 15, a water supply switch 16 and a suction switch 17.

An air supply pump 20 which constitutes an air supply means 19 is provided in the device body 18 of the control device 2, and this air supply pump 20 communicates with the air supply pipeline 11, and the air supply pipeline 11 has two directions in the middle thereof. A first opening / closing valve 21 including a solenoid valve is provided. Also, 22
Is a water supply means, which is a water pump 23 and a water tank 24.
And a second opening / closing valve 25, which is a two-way solenoid valve provided in the middle of the water supply conduit 12 communicating with the water supply tank 24. Further, a branch pipeline 26 branched from the middle of the water supply pipeline 12 is provided, and the branch pipeline 26 communicates with a suction pump 28 via a suction tank 27 to constitute a suction means 29, and A third opening / closing valve 30, which is a two-way electromagnetic valve, is provided in the middle of the branch line 26. Further, a control circuit 31 is provided inside the device main body 18, and an open / close signal is input from the air supply switch 15, the water supply switch 16 and the suction switch 17 provided in the operation unit 3 of the endoscope 1,
The air supply means 19, the water supply means 22, and the suction means 29 are controlled.

Next, the operation of the endoscope apparatus configured as described above will be described based on the timing chart of FIG.

First, when the air supply switch 15 is closed, an operation signal is input to the air supply pump 20 and the first opening / closing valve 21 via the control circuit 31, the air supply pump 20 is operated, and the first opening / closing valve is operated.
21 opens. Therefore, the gas supplied from the air supply pump 20 is supplied from the nozzle 9 via the air supply conduit 11. When the water supply switch 16 is closed, an operation signal is input to the water supply pump 23 and the second opening / closing valve 25 via the control circuit 31, the water supply pump 23 is operated, and the second opening / closing valve 25 is opened. It Therefore, the water in the water supply tank 24 is sent through the water supply pipe line 12, and the nozzle 9
Will be sent from. At this time, at the same time, an operation signal is also input to the suction pump 28 to perform suction operation, but no operation signal is input to the third opening / closing valve 30 and the closed state is maintained. Therefore, the suction means 29 does not perform a substantial suction operation.

When the water supply switch 16 is opened, a stop signal is input to the water supply pump 23 and the suction pump 28 via the control circuit 31, and a closing signal is input to the second opening / closing valve 25. Therefore, the water supply from the nozzle 9 is stopped, and the water in the middle of the water supply pipe 12 is stopped in that state. At this time, that is, immediately after the water supply stop signal is input to the water supply means 22 and the water supply is stopped, the operation signal is input from the control circuit 31 to the third opening / closing valve 30 for a certain period of time. Therefore, the third opening / closing valve 30 is temporarily opened, and the branch pipe line 26 in the negative pressure state communicates with the water supply pipe line 12. Therefore, the water that has stood still in the middle of the water supply line 12 is sucked into the suction tank via the branch line 26.
It will be sucked into 27. For this reason, after the water supply pipeline 12 that has expanded during water supply stops water supply, it tries to be restored to push out the water inside, but it is possible to prevent the water from being pushed out by the suction by the suction means 29, and from the nozzle 9. Can be prevented in advance, and the water drainage can be improved.

FIG. 3 and FIG. 4 show the second embodiment.
The same components as those in the above embodiment are denoted by the same reference numerals and the description thereof will be omitted. In this embodiment, the suction pipe line 13 is connected to a commercially available suction device 32 as a suction means, and the suction pipe line 13 is branched in the device body 18 via a communication pipe line 33 to branch the water supply pipe line 12.
And a fourth opening / closing valve 34 consisting of a two-way solenoid valve is provided in the middle of the suction pipe line 13, and the second opening / closing valve 34 is provided in the middle of the communication pipe line 33.
A fifth on-off valve 35 composed of a directional solenoid valve is provided.

Therefore, as shown in the timing chart of FIG. 4, when the water supply switch 16 is closed, an operation signal is input to the water supply pump 23 and the second opening / closing valve 25 via the control circuit 31, and the water supply pump 23 operates. Together with the second on-off valve 25
Is released. Therefore, the water in the water feed tank 24 is fed through the water feed conduit 12 and is fed from the nozzle 9. At this time, the suction device 32 is always in operation,
The fourth opening / closing valve 34 and the fifth opening / closing valve 35 are in a closed state. Next, when the water supply switch 16 is opened, the control circuit 31
A stop signal is input to the water pump 23 and the suction pump 28 via the, and a closing signal is input to the second opening / closing valve 25. Therefore, the water supply from the nozzle 9 is stopped, and the water in the middle of the water supply pipe 12 is stopped in that state.
At this time, that is, immediately after the water supply stop signal is input to the water supply means 22 and the water supply is stopped, the operation signal is input from the control circuit 31 to the fifth opening / closing valve 35 for a certain period of time. Therefore, the fifth on-off valve 35 is temporarily opened, and the suction device 32 communicates with the water supply conduit 12 via the water supply conduit 13 and the communication conduit 33.
Therefore, the water that has stood still in the middle of the water supply conduit 12 is sucked into the suction device 32 via the communication conduit 33. For this reason, after the water supply pipeline 12 that has expanded during water supply stops water supply, it tries to be restored and push out the water inside, but it is possible to prevent the water from being pushed out by the suction by the suction device 32, and from the nozzle 9. Can be prevented in advance, and the water drainage can be improved.

Although the first and second embodiments have been described with respect to the case where only water is supplied at the time of water supply, the air supply pump 20 and the first on-off valve 21 are driven and communicated at the same time as the water supply switch 16 is closed. By means of this, it is possible to carry out sprayed water supply (mixed water supply with air and water), and in this case as well, similar operational effects are obtained.

〔The invention's effect〕

As described above, according to the present invention, in an endoscope apparatus that switches between air supply, water supply, and suction by electrical control, water in the water supply conduit is sucked for a certain period of time immediately after the water supply is stopped by the water supply means. By providing the suction means, it is possible to prevent the water accumulated in the water supply pipe from being pushed out, and it is possible to eliminate the poor drainage property.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an endoscope apparatus showing a first embodiment of the present invention, FIG. 2 is a timing chart diagram thereof, and FIG. 3 is an endoscope showing a second embodiment of the present invention. FIG. 4 is a schematic configuration diagram of the apparatus, FIG.
The figure shows the state of the water in the water supply line immediately after the water supply is stopped in the conventional endoscope apparatus. (A) is an explanatory diagram of an electrical control system, and (B) is an explanatory diagram of a mechanical control system. . 1 ... Endoscope, 2 ... Control device, 3 ... Operation part, 6a ... Observation window,
8 ... Tip part, 9 ... Nozzle, 11 ... Air supply pipe line, 12 ... Water supply pipe line, 16 ... Water supply switch, 22 ... Water supply means, 29 ... Suction means,
32 ... Suction device (suction means).

Claims (1)

[Claims] Claim: What is claimed is: 1. An endoscope, a nozzle provided at the tip of an insertion portion of the endoscope and opening toward an observation window, and a nozzle provided at the endoscope that joins the insertion portion on the tip side. An air supply line and a water supply line communicating with the nozzle, a water supply switch provided in the operation section of the endoscope, and a water supply switch which is operated by a closing signal of the water supply switch to supply water to the water supply line and observe from the nozzle In an endoscope apparatus including a control device having a water supply means for supplying water toward a window, immediately after stopping the water supply by the water supply means, a suction means for sucking water in the water supply conduit for a certain period of time is provided. Endoscope device.