JPH11104069A - Endoscope fluid control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce power consumption and costs while taking advantage of the washability of a pinch valve and simplify draining work by eliminating the need to remove ducts. SOLUTION: In a solenoid valve unit 20 controlling each duct in an endoscope to open and close the same, a pinch valve V3 is placed in a water feed pipe 12C, and diaphragm valves V1 , V2 are placed in air feed pipes 13C, 13D, and check valves 29, 30 are arranged in the air feed pipe 13C. An air feed pipe 13E is connected to the water feed pipe 12C, and an auxiliary valve V4 formed by a diaphragm valve is placed therein, and a check valve 31 is mounted therein. When a control part 24 closes the valves V1 , V2 and opens the valve V3 and the auxiliary valve V4 according to the operation of a draining switch 32, air can be supplied to the water feed pipes 12 (12B, 12C), so that draining is made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid control device for an endoscope, and more particularly to a control device for controlling fluid supply in an air supply pipe, a water supply pipe, a suction pipe, and the like provided in the endoscope.

[0002]

2. Description of the Related Art In an endoscope apparatus, an air supply / water supply pipe for performing air supply or water supply is provided in an objective lens window or the like at a distal end portion. Can be removed. Further, a suction tube is provided in the endoscope, and with this suction tube, it becomes possible to suck and discharge contents and the like in the body to be observed.

[0003] The control of the fluid in each of the above pipelines is performed by a fluid control device such as an electromagnetic valve unit. In this fluid control device, a pinch valve or the like is used as the electromagnetic valve. This pinch valve closes the pipeline by crushing a flexible tube portion of each pipeline disposed in the valve, and releases the crushed state to open. According to such a pinch valve, the opening / closing portion does not become clogged with dirt and the like, and the cleaning brush can also pass through the valve portion, thereby facilitating cleaning of the pipeline. Further, there is an advantage that the exchange of the pipeline can be easily performed.

[0004]

However, in the above-mentioned pinch valve, since the soft tube is crushed,
There has been a problem in that the flexible tube has a crushing habit and the flow rate decreases, and the deterioration of the flexible tube is accelerated. In addition, the pinch valve is of a crushing type and therefore consumes high power, as compared with a diaphragm valve, and increases in cost in consideration of the above-described replacement work due to the deterioration of the flexible tube.

[0005] Among the various conduits of an endoscope, the air supply pipe is not particularly required to be periodically cleaned unless liquid or the like invades. Therefore, the above-mentioned inconvenience can be reduced by removing the air supply pipe from the object of cleaning and eliminating the arrangement of the pinch valve for this.

[0006] In a water supply pipe or a suction pipe of an endoscope, water is drained by air supply after use of the endoscope or after cleaning of a conduit. For example, conventionally, the water supply pipe and the suction pipe are attached to a solenoid valve unit. The air supply of the water supply pipe was performed by removing the water supply pipe and the air supply pipe and changing the connection state. For this reason, there has been a problem that the draining operation is complicated, takes a long time, and lacks simplicity.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to reduce the power consumption and reduce the cost while taking advantage of the cleanability of a pinch valve, and to simplify the drainage operation. It is an object of the present invention to provide an endoscope fluid control device which can be used as a control device.

[0008]

In order to achieve the above object, the present invention provides an endoscope fluid control device for controlling the opening and closing of various pipes arranged in an endoscope. A diaphragm valve is arranged as an on-off valve for the air duct, and a pinch valve is arranged as an on-off valve for a liquid duct for sending liquid, and the air feeding duct is connected to the liquid duct via a check valve, An auxiliary on-off valve including a diaphragm valve for supplying air from the air supply line to the liquid line is provided.

According to the above configuration, if the pinch valve is arranged only in the water supply pipe or suction pipe requiring cleaning and the diaphragm valve is disposed in the air supply pipe, the cleaning brush can be passed. Advantages can be enjoyed, and power consumption can be reduced and costs can be reduced. Also, if you open the auxiliary on-off valve, the air pipe is connected to the water pipe,
Air can be supplied to the water pipe, and the drainage operation can be easily performed.

[0010]

FIG. 1 shows the configuration of an electromagnetic valve unit which is an endoscope fluid control device according to an embodiment.
FIG. 2 shows a configuration of a conduit system of an endoscope to which the solenoid valve unit is connected. First, in FIG. 2, an endoscope (electronic endoscope) 10 includes an operation unit 10 from a distal end 10A.
Up to B, a water pipe 12A, an air pipe 13A, and a suction pipe (also a treatment instrument insertion channel) 14A are provided. A detachable cap 15 is attached to the distal end of the distal end portion 10A, and a nozzle or the like for supplying air / water to an observation window (lens window of the objective optical system) is provided on the cap 15.

As shown in the figure, the operation unit 10B is provided with an air / water (A / W) switch 16, a suction switch 17, and a photographing button 18, which are two-stage switches. The operation control signal 17 is supplied to the solenoid valve unit 20 in FIG. 1 via a signal line (not shown). The operation unit 10B and the solenoid valve unit 20
A water pipe 12B and an air pipe 13B are provided in the cable so as to connect the two. A pipe unit 10C is provided on the rear side of the operation unit 10B, and the water supply pipes 12A and 12B and the air supply pipes 13A and 13B are connected by a folded portion formed when the pipe unit 10C is connected. Is done.

A suction pipe 14B extending to the solenoid valve unit 20 is attached to the conduit unit 10C.
1 is provided. The illustrated member 22 connected to the water pipe 12A is a lens surface flash port for supplying air / water by mounting a syringe or the like when the degree of contamination on the observation window lens surface is high.

The solenoid valve unit 20 shown in FIG. 1 is provided with a control unit 24 for controlling the opening and closing of the solenoid valve and a pump 25.
A water supply tank 26 and a suction tank 27 are provided outside, and the pump 25 is provided with an air supply pipe 13C communicating with the air supply pipe 13B. The air supply pipe 13C has a check valve 29 (unit 20). ) And a diaphragm valve (electromagnetic valve) V1. In this air pipe 13C,
An air release pipe 13D in which a diaphragm valve V2 is disposed is connected, and an air supply pipe 13E guided to the water supply tank 26 is connected.
Is provided with a check valve 30 at the outlet. These check valves 2
9 and 30 are air supply pipes 13 inside the solenoid valve unit 20.
Water or the like is prevented from entering the C, D, and E from the outside, whereby the air supply pipe 13 can be excluded from the objects to be cleaned.

Further, the electromagnetic valve unit 20 is provided with a water supply pipe 12C connecting from the water supply tank 26 to the water supply pipe 12B, and the water supply pipe 12C is provided with a pinch valve (electromagnetic valve) V.
3 is provided. In the middle of the water supply pipe 12C, an air supply pipe 13F connected to the pump 25 as shown in the figure.
An auxiliary valve (water drain valve) V4 composed of a diaphragm valve is arranged on the air supply pipe 13F, and a check valve 31 is provided.

On the other hand, the suction pipe 14B is provided with a suction pipe 14C connected to the suction tank 27 and an air release pipe 14D branched from the suction pipe 14C. The suction pipe 14C has a pinch valve V5 and the air release pipe 14D. Pinch valve V6
Is arranged. The suction tank 27 is connected to another pump (not shown).

As described above, in this example, the air supply pipe 13
Diaphragm valves V 1, V 2, V 4 are arranged in C to E, and pinch valves V are provided in water supply pipe 12 C and suction pipes 14 C, D.
3, V5 and V6 are arranged, but this pinch valve V
3, V5 and V6 drive the pressing portion P attached to the drive shaft using an electromagnetic solenoid or the like, thereby crushing the flexible portion of each pipe arranged in the valve (for example, like V6). The conduit can be closed.

A drain switch 32 for draining work is disposed on an operation panel or the like of the solenoid valve unit 20, and a signal of the operation switch 32 is transmitted to the control unit 24.
Given to.

The embodiment is constructed as described above. When the water supply operation is performed by the air supply / water supply switch 16 of the operation unit 10B shown in FIG. 2, the electromagnetic valve unit 20 shown in FIG.
, The valves V1, V2, and V4 are closed and the valve V3 is opened, and the water pipes 12C, 12B, and 12A are opened.
The water supply is performed via. When the air supply operation is performed by the switch 16, the valves V2, V3, and V4 are closed and the valve V1 is opened, and air is supplied through the air supply pipes 13C, 13B, and 13A. During the air supply / water supply standby, only the valve V2 is opened, and the air from the pump 25 is discharged to the atmosphere from the atmosphere open pipe 13D.

In this example, air can be sent to the water pipe 12. That is, when the drain switch 32 is turned on, the control unit 24 operates the valve V1.
, V2 are closed, the valve V3 is opened, and the auxiliary valve V4 is opened, whereby air from the pump 25 is supplied to the water supply pipes 12C, 12B, 12A. According to this, the drainage of the water pipe 12 can be easily performed by pressing the switch 32, and the work of attaching and detaching each pipe as in the related art is not required. In the above operation, the check valve 31 prevents the water from flowing back to the air supply pipe 13F.

Further, the suction switch 1 of the operation unit 10B
When the operator operates the valve 7, as shown in FIG. 1, the valve V5 is opened and the valve V6 is closed, and suction is performed through the suction pipes 14C to 14A. During this suction standby, the valve V
Only 6 is opened, and air is sucked from the atmosphere suction pipe 14D.

In the above example, the drainage of the water supply pipe has been described. However, the same configuration can be applied to the suction pipe.

[0022]

As described above, according to the present invention,
A diaphragm valve is arranged as an on-off valve for the air supply line,
A pinch valve is arranged as an on-off valve for the liquid line, and an air supply line is connected to the liquid line via a check valve,
An auxiliary opening / closing valve consisting of a diaphragm valve is also provided in this air supply line, so that while taking advantage of the cleaning properties of the pinch valve, power consumption is reduced and cost is reduced, and water is drained without removing the line. Work can be simplified.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an endoscope fluid control device (solenoid valve unit) according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a conduit system of an endoscope to which the electromagnetic valve unit of FIG. 1 is connected.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Endoscope, 12A-12C ... Water supply pipe, 13A-13E ... Air supply pipe, 14A-14D ... Suction pipe, 20 ... Solenoid valve unit, 29, 30, 31 ... Check valve, 32 ... Drain switch, V1 , V2, V4 ... diaphragm valve, V3, V5, V6 ... pinch valve.

Claims (1)

[Claims] 1. An endoscope fluid control device for controlling the opening and closing of various conduits arranged in an endoscope, wherein a diaphragm valve is arranged as an on-off valve of an air supply conduit for sending air, and a liquid is sent. A pinch valve is arranged as an opening / closing valve for a liquid line for connecting the air supply line to the liquid line via a check valve,
An endoscope fluid control device, comprising an auxiliary on-off valve comprising a diaphragm valve for supplying air from the air supply line to the liquid line.