JPS5845682Y2 - Air and water supply device for endoscopes - Google Patents

Description

[Detailed description of the invention] The present invention relates to an air and water supply device for an endoscope, and in particular eliminates residual water in the water supply channel connected to the endoscope from the cleaning water storage tank and the water supply tube inside the endoscope. The present invention relates to a device that has the function of

In endoscopes, in particular gastrointestinal endoscopes, in which the distal end of a flexible tubule is inserted into a body cavity and the subject is observed through an endoscopic window at the distal end, the distal end of the endoscope is In order to maintain an observation distance between the body cavity and the wall of the examined part, it is necessary to blow air into the examined part to inflate the iron part appropriately.

In addition, cleaning of the lens surface of the internal window of the endoscope inserted to the test site due to fogging or dirt adhering to the window, or cleaning of the observation surface dirty due to bleeding, etc. It is also necessary to send washing water to the examination department.

For this purpose, this type of endoscope is equipped with an air supply tube and a water supply tube connected to the hand-operated part, which are provided through a flexible tube and extended to the distal end via an air and water supply switching valve mechanism. An air and water supply device connected to the air and water supply tube is attached.

When the endoscope is used, the valve mechanism is operated so that air or water can be supplied to the examined area at the appropriate time.

By the way, in this type of conventional endoscope, if the use is stopped while the water is still being supplied, the cleaning water in the water supply path remains in the series of channels even after the endoscopy, and this problem occurs. It has been extremely difficult to drain residual water, particularly from the water supply tube extending from the water storage tank to the endoscope.

The tip area of the air and water supply tube that opens at the tip of the endoscope is contaminated by backflow due to internal body pressure, and residual water in the water supply system can cause putrefaction. It is not sanitary to reuse or store the water inside.

Furthermore, this water supply system is generally constructed using plastic tubes, but due to the water absorption properties of plastic materials, or the adhesion or brazing of connections in the system, water leakage may occur due to corrosion in the treated parts. There was a risk that this could occur.

Therefore, the present invention attempts to provide an air and water supply device that can actively remove residual water in the water supply system after use of an endoscope by using compressed air pressure for air supply. be.

Below, illustrated embodiments of the device of the present invention will be described.

FIG. 1 is a structural layout diagram showing an embodiment of the device of the present invention, in which an air supply tube 4 that connects an air pump 1 to a cleaning water storage tank 2 and an endoscope 3 is provided with an air supply path switching member. The switching valve 5 is connected.

On the other hand, between the cleaning water storage tank 2 and the air/water supply switching valve 20 in the endoscope 3, a water supply tube 6 and a water pumping pipe 17 connected to the water supply port 16 are arranged as is conventionally known.

The feed path switching valve 5 includes a cylinder housing 5a fixed to the device housing wall of the air pump 1, and a counter pressure spring 5b.
The casing 5a is biased with an acting force in the protrusion direction by
The air receiver provided in the housing 5a is provided with a first air outlet 8 and a second air outlet 9 with respect to the lower part. On the other hand, the piston 5C has a circumferential groove 10 that connects the air receiver with the lower air outlet 8 in its protruding position, and a circumferential groove 10 that connects the air receiver with the lower air outlet 8 in its pushed-in position. Circumferential groove 11 connecting with air outlet 9
and is perforated.

Further, the second air supply outlet 9 and the water supply tube 6
and the drainage air supply tube 13 via the check valve 12.
These constitute a compressed air intake section, and the compressed water is not sent to the switching valve 5 side, and the compressed air from the second air supply outlet 9 is passed through this for water supply. It is designed to be fed into the tube 6.

In addition, reference numeral 14 indicates an air supply receiving port of the water storage tank 2 that receives compressed air, 15 indicates an air supply pipe connected to the port 14 and opens into the hollow part of the tank 2, 16 indicates a water supply port of the tank 2, and 17
18 is an air supply receiver in the endoscope 3; 19 is a water supply receiver;
20 is an air/water supply switching valve, and 21 is an air/water supply tube.

FIG. 2 is a configuration diagram showing another embodiment of the device of the present invention.
In this embodiment, the same functional parts as in the first illustrated embodiment will be described with the same symbols, but in particular, the parts located in the hollow part of the pumping pipe 17 facing into the water storage tank 2, A side pipe 17a is provided, and the opening and closing of the side pipe 17H to the hollow part in the tank can be controlled by a cock 22, thereby serving as a feed path switching member.

The operation of the device of the present invention having such a configuration will be explained below. First, in the configuration of the first illustrated embodiment, in the normal use condition, the piston 5C of the switching valve 5 as the feed path switching member protrudes to the illustrated state. There is.

In this state, the compressed air from the air pump 1 is supplied to the air supply tube 4, the air receiver is the lower part, the circumferential groove 10, and the air supply outlet 8.
The air is then sent to the endoscope 3 and the water storage tank 2 via the air supply tube 4.

At this time, if the air/water supply switching valve 20 of the endoscope 3 is in the air supply state and the water supply side is closed, air supply to the water storage tank 2 side is blocked, and the compressed air from the air pump 1 is not supplied. It passes through the water supply tube 21 and is sent to the tip of the endoscope.

Here, when the air and water supply switching valve 20 is operated to close the air supply side and open the water supply side, the compressed air from the air pump 1 is sent into the water storage tank 2, and the water is stored in the water pump 17 by the air pressure. The water is pushed up through the water supply tube 6, the air and water supply tube 21, and is supplied to the distal end of the endoscope.

After completing the inspection of the test area using the endoscope after such air and water supply operations, if the piston 5C of the switching valve 5 as the channel switching member is pressed against the force of the anti-pressure spring 5b, As the piston 5C moves, the circumferential groove 11 connects the lower air receiver and the second air outlet 9, and the compressed air from the air pump 1 is transferred to the draining air tube. 1
3 and the check valve 12 to the compressed air intake section of the water supply tube 6, and as a result, the air and water supply tube 21 passes through the tube 6 and the air and water supply switching valve 20 which has been switched to the water supply state. The remaining water in the water supply system, including water, will be pushed out from the end of the endoscope and drained.

In the case of the embodiment shown in the second figure, the side pipe 17a in the water storage tank 2 is closed by operating the cock 22, and the air and water supply operation in the endoscope 3 is performed as described above. This can be done in the same way as in the illustrated embodiment.

After the endoscopic examination, when the cock 22 serving as the compressed air supply path switching member is operated to open the side pipe 17a into communication with the space inside the water storage tank 2, air is sent from the air pump 1 into the water storage tank 2. The compressed air is sent from the side pipe 17a to the compressed air intake section constructed between the water pumping pipe 17 and the water supply tube 6, and the remaining water in the water supply system including the iron pipe 17 is brought into a water supply state. Water can be drained from the tip of the air/water tube 21 at the distal end of the endoscope via the air/water switching valve 20 of a given endoscope 3.

As described above, the device of the present invention utilizes the air and water supply mechanism in the endoscope to provide an air supply path that is connected to the endoscope external path in the water supply system path by a switching operation. Since residual water in the water supply system after endoscopy can be actively removed by using the supplied air, the drawbacks of the conventional air and water supply devices in endoscopes mentioned at the beginning can be effectively eliminated. The practical effect can be achieved.

In addition, the feed path switching valve 5 and the cock 22 in the device of the present invention
It goes without saying that the specific configuration and the arrangement position in the water supply system can be changed without departing from the intended purpose of the device of the present invention.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram showing one embodiment of the device of the present invention;
The figure is a structural layout diagram showing another embodiment of the device of the present invention. 1...Air pump, 2...Water tank, 3...Endoscope, 4...Air supply tube, 5... Switching valve, 6... Water supply tube, 17... Water pumping pipe, 20... Air/water supply switching valve, 21... Air/water supply tube, 22
······cock.

Claims (1)

[Scope of utility model registration request] An air receiver for receiving compressed air, which is provided in a water storage tank 2 having a water supply port 16 for sending out cleaning water, connects the port 14 and the air/water supply switching valve 20 of the endoscope 3 to the air supply port 16 for the air pump 1. They are connected by a tube 4, and a water supply tube 6 is disposed between the water supply port 16 of the water storage tank 2 and the air/water supply switching valve 20 of the endoscope 3, so that the air/water supply switching valve 20 is connected. In a mechanism designed to alternately supply air and water to the distal end of an endoscope, a water supply channel in which a water pump 17 in a water storage tank 2 connected to the water supply port 16 and the water supply tube 6 are connected is arranged. An intake section for the compressed air guided from the air pump 1 is provided on the water storage tank 2 side, and feed path switching members 5 and 22 are provided to control the opening and closing of the air flow path of this intake section. The compressed air intake section, which is normally closed, is opened, and residual water in the water supply channel and the endoscopy tube 21 is discharged and removed by the compressed air introduced through the compressed air intake section. Air and water supply device for endoscopes.