JPS62133927A - Endoscope apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention operates a water supply means by operating a water supply switch provided in the operation section of an endoscope, and supplies water from a nozzle provided at the distal end of the insertion section. This invention relates to an endoscope device that can supply water.

[Conventional technology]

Generally, the endoscope body is provided with fluid conduits for air supply, water supply, and suction. The air supply pipe and the water supply pipe converge on the distal end side of the insertion section of the endoscope, and communicate with a nozzle that opens toward the observation window provided at the distal end. The device is configured so that when it becomes dirty with dirt or other substances, the dirt can be removed by sending water from the nozzle toward the observation window.

Therefore, the endoscope apparatus is provided with a control means for controlling switching between the air supply, water supply, and suction. Conventionally, this control means includes mechanical control in which a switching valve provided in the operating section of the endoscope is directly operated by hand, and the control means for controlling the endoscope as shown in, for example, Japanese Patent Application Laid-open No. 75131/1983. There is electrical control in which a switch is provided in the operating section and the switch is operated with a finger to control a solenoid valve provided in each conduit within the optical power supply device.

This electrical control method only requires a switch on the operating section of the endoscope, and unlike mechanical control methods, there is no need to provide air supply valves, water supply valves, suction valves, etc. on the operating section. It is popular because it is lightweight and has excellent operability as an endoscope.

[Problem that the invention seeks to solve]

In the endoscope apparatus configured as described above, the type in which air supply, water supply and suction are electrically controlled is as shown in FIG. A solenoid valve C is provided in the water supply pipe, and this water supply pipe joins the air supply pipe f on the distal end side of the insertion part e of the endoscope d, and there is a gap between the solenoid valve C and the confluence part g. If the length l of the water supply pipe connecting the endoscope is very long and the mechanical control type is used, as shown in Fig. 5 (B), an air/water supply switching valve i is installed in the operation section of the endoscope d. is provided, the air/water supply switching valve i and the confluence section g
The length between them is short. Therefore, even if the water supply pipe is blocked by the solenoid valve C, the electrically controlled water pipe expands during water supply. There is a disadvantage that the air is pushed out to the air supply pipe f through the confluence g and drips from the nozzle j, and the water draining property is poor. This phenomenon also occurs in the case of a mechanical control system, but since the water supply pipe is blocked by the air/water supply switching valve i installed at the operation part, the pipe that expands when water is supplied, that is, the water supply Since the water pipes are short, drainage is not a big problem.

This invention was made based on the above-mentioned circumstances, and even with an electrical control system in which the water supply means is controlled by a switch provided on the operation part, it is not possible to solve the problem of poor drainage after water supply is stopped. The purpose is to provide an endoscopic device that can

[Means and effects for solving the problems] This invention has the following features:
Immediately after water supply by the water supply means stops, in a device that operates a water supply means by a closing signal of a water supply switch provided in the operation section of an endoscope, supplies water to a water supply pipe, and supplies water from a nozzle toward an observation window. A suction means for sucking water in the water supply pipe for a certain period of time is provided to prevent water accumulated in the water supply pipe from being forced out.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

1 and 2 show a first embodiment, where 1 is an endoscope and 2 is a control device such as a charging source device. The endoscope 1 includes an operating section 3, an insertion section 4, and a universal cord 5. The insertion section 4 is equipped with an observation optical fiber bundle 6 and an illumination optical fiber bundle 7, and the observation optical fiber bundle 6 is provided with an observation window 6a provided at the distal end 8 of the insertion section 4.
The illumination optical fiber bundles 7 are respectively opposed to the illumination windows 7a. Furthermore, the tip portion 8 is provided with a nozzle 9 that opens toward the observation window 6a, and is also provided with a suction port 10. Further, the insertion section 4 is equipped with an air supply pipe 11, a water supply pipe 12, and a suction pipe 13, and the air supply pipe 11 and the water supply pipe 12 are merged at the distal end side of the insertion section 4 to form the nozzle. It is connected to 9. Further, the suction pipe line 13 communicates with the suction port 10. These air supply pipe line 11, water supply pipe line 12, and suction pipe line 13 are connected to a connector 14 through the interior of the universal cord 5, and communicate with the control device 2 via this connector 14. Furthermore, the operation section 3 of the endoscope 1 includes an air supply switch 15, a water supply switch 16, and a suction switch 17.
is provided.

An air supply pump 20 constituting the air supply means 19 is provided in the device main body 18 of the control device 2, and this is connected to the air supply pipe 11.
A first on-off valve 21, which is a two-way solenoid valve, is provided in the middle of the air supply line 11. Further, 22 is a water supply means, which is the water supply pump 2.
3, a water supply tank 24, and a second on-off valve 25, which is a two-way electromagnetic valve, provided in the middle of the water supply pipe 12 communicating with the water supply tank 24. Further, a branch pipe 26 is provided which branches off from the middle of the water supply pipe 12, and this branch pipe 26 communicates with a suction pump 28 via a suction tank 27 to constitute a suction means 29. A third on-off valve 30 consisting of a two-way solenoid valve is provided in the middle of the branch pipe 26. Furthermore, a control circuit 31 is provided inside the device main body 18, and manually controls opening/closing signals from the air supply switch 15, water supply switch 16, and suction switch 17 provided on the operation section 3 of the endoscope 1.
The air supply means 19, water supply means 22 and suction means 29 are controlled.

Next, the operation of the endoscope apparatus configured as described above will be explained based on the timing chart of FIG. 2.

First, when the air supply switch 15 is closed, an actuation signal is manually applied to the air supply pump 20 and the first on-off valve 21 via the control circuit 31, and the air supply pump 20 is operated and the first on-off valve 21 is operated. opens.

Therefore, the gas sent from the air pump 20 is sent from the nozzle 9 via the air pipe line 11. Furthermore, when the water supply switch 16 is closed, an activation signal is manually applied to the water supply pump 23 and the second on-off valve 25 via the control circuit 31, so that the water supply pump 23 is operated and the second on-off valve 25 is opened. Ru. Therefore, the water in the water tank 24 is sent through the water pipe 12 and from the nozzle 9. At this time, an actuation signal is also manually applied to the suction pump 28 to perform suction operation, but an actuation signal is not manually applied to the third on-off valve 30, which maintains the closed state. Therefore, the suction means 29 does not perform a substantial suction operation.

When the water supply switch 16 is opened, a stop signal is manually inputted to the water supply pump 23 and the suction pump 28 via the control circuit 31, and a closing signal is inputted to the second on-off valve 25. Therefore, the water supply from the nozzle 9 is stopped, and the water in the middle of the water supply pipe 12 remains stationary in that state.

At this time, immediately after the water supply stop signal is manually inputted to the water supply means 22 and the water supply is stopped, the third on-off valve 3 is activated from the control circuit 31.
An actuation signal is input to 0 for a certain period of time. Therefore, the third on-off valve 30 is temporarily in an open state, and the branch pipe line 26 in a negative pressure state is communicated with the water supply pipe line 12. Therefore, the water that has accumulated in a static state in the middle of the water supply pipe 12 is drawn into the suction tank 27 via the branch pipe 26. For this reason, the water supply pipe 12 expanded during water supply.
After the water supply is stopped, the water tries to restore and push out the water inside, but the suction by the suction means 29 prevents the water from being pushed out, prevents dripping from the nozzle 9, and improves water drainage. Can be directed towards.

Figures 3 and 4 show the second embodiment;
Components that are the same as those in the embodiment described above are given the same numbers and their explanations will be omitted. In this embodiment, the suction pipe 13 is connected to a commercially available suction device 32 as a suction means, and the suction pipe 13 is connected to the water supply pipe 12 via a communication pipe 33 that branches within the device main body 18. Furthermore, a fourth on-off valve 34 made of a two-way solenoid valve is provided in the middle of the suction pipe 13, and a fifth on-off valve 3 made of a two-way solenoid valve is provided in the middle of the communication pipe 33.
5.

Therefore, as shown in the timing chart of FIG. 4, when the water supply switch 16 is closed, an activation signal is manually applied to the water supply pump 23 and the second on-off valve 25 via the control circuit 31, and the water supply pump 23 is operated. At the same time, the second on-off valve 25 is opened. So, water tank 24
The water inside is sent through the water pipe 12 and then from the nozzle 9. At this time, the suction device 32 is always in operation, and the fourth on-off valve 34 and the fifth on-off valve 35 are in a closed state. Next, 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 the second
A closing signal is input to the on-off valve 25. Therefore, the water supply from the nozzle 9 is stopped, and the water in the middle of the water supply pipe 12 remains stationary in that state. At this time, immediately after the water supply stop signal is input to the water supply means 22 and the water supply is stopped,
An operating signal is manually applied from the control circuit 31 to the fifth on-off valve 35 for a certain period of time. Therefore, the fifth on-off valve 35 is temporarily in an open state, and the suction device 32 communicates with the water supply pipe 12 via the water supply pipe 13 and the communication pipe 33. Therefore, water that has been stationary in the middle of the water supply pipe 12 is sucked into the suction device 32 via the communication pipe 33. For this reason, after the water supply pipe 12, which expanded during water supply, returns to its original state and tries to push out the water inside,
The suction by the suction device 32 can prevent the water from being forced out, prevent dripping from the nozzle 9, and improve water drainage.

In addition, in the first and second embodiments, the case where only water is supplied during water supply has been described, but the air supply pump 20 and the first
Spray water supply (air-water mixed water supply) by driving and communicating the on-off valve 21 at the same time as the water supply switch 16 is opened.
is possible, and similar effects can be obtained in this case as well.

〔Effect of the invention〕

As explained above, according to the present invention, in an endoscope apparatus that performs switching between air supply, water supply, and suction by electrical control, water in the water supply pipe is suctioned for a certain period of time immediately after the water supply means stops supplying water. By providing the suction means, it is possible to prevent the water accumulated in the water supply pipe from being forced out, and it is possible to solve the problem of poor water drainage.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of an endoscope apparatus according to a first embodiment of the present invention, FIG. 2 is a timing chart diagram, and FIG. 3 is an endoscope apparatus according to a second embodiment of the present invention. A schematic configuration diagram of the device, Figure 4 is also a timing chart diagram, Figure 5
The figures show the state of water in the water supply pipe immediately after the water supply is stopped in a conventional endoscope device. (A) is an explanatory diagram of the electrical control method, and (B) is an explanatory diagram of the mechanical control method. . 1... Endoscope, 2... Control device, 3... Operation unit,
6a... Observation window, 8... Tip, 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] an endoscope; a nozzle provided at the distal end of the insertion section of the endoscope and opening toward the observation window; and a nozzle provided on the endoscope that joins the insertion section at the distal end side and communicates with the nozzle. A water supply switch is provided in the trachea, the water supply pipe, and the operating section of the endoscope, and is activated by a closing signal of the water supply switch to supply water to the water supply pipe and send water from the nozzle toward the observation window. an endoscope apparatus comprising a control device having a water supplying means, characterized in that an endoscope is provided with a suction means for sucking water in the water supply pipe for a certain period of time immediately after the water supply by the water supply means stops supplying water. Device.