JPH0886966A - Internal pressure adjusting device for endoscope - Google Patents

Abstract

PURPOSE: To put an endoscope into an evacuation and sterilization chamber in order not to burst a soft coated part and also to automatically bring the internal pressure of the endoscope near to atmospheric pressure after evacuation and sterilization are performed, so that the endoscope can be always used without disturbance. CONSTITUTION: A valve 20 for communicating an inside with an outside which is usually closed and is opened due to the attachment of a check valve 30 to the valve 20 is provided on on the partitioning part of the endoscope 10. The check valve 30 making gas pass through only from the internal part to the external part of the endoscope 10 is attachably/detachably attached to the valve 20, and also a forcibly communicating process in which the valves 20 and 30 are forcibly and simultaneously opened so as to communicate the internal part with the external part of the endoscope 10 in the case of operation for detaching the valve 30 from the valve 20 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an internal pressure adjusting device for an endoscope which may be sterilized by an autoclave or ethylene oxide gas (EOG).

[0002]

2. Description of the Related Art In order to sterilize an endoscope by using ethylene oxide gas or an autoclave, it is necessary to depressurize the sterilization chamber containing the endoscope, and the endoscope must withstand such a low pressure environment. It is necessary to make the structure.

In this case, the problem is that the most flexible part of the exterior of the endoscope, for example, the covering tube of the curved part which is generally made of rubber, swells and bursts when the pressure is reduced. That is.

Therefore, conventionally, a check valve that allows gas to pass from the inside to the outside of the endoscope and does not allow gas to pass from the outside to the inside of the endoscope has been prepared, and the check valve is normally closed. The check valve can be attached to and detached from the internal / external communication valve provided in the endoscope so that it opens only when the check valve is attached.
-253168).

By mounting the check valve in this way, the air inside the endoscope escapes to the outside to reduce the internal pressure in the pressure-reduced sterilization chamber, and the vapor, gas, cleaning water, etc. are observed during sterilization and cleaning. There is no danger of entering the mirror.

[0006]

However, with such a structure, the sterilization process of the endoscope is completed and the check valve is removed from the endoscope. At the same time, the internal and external communication valves are closed. The internal pressure of the endoscope remains lower than atmospheric pressure.

Then, the covering tube of the most flexible bending portion in the exterior of the endoscope is in a state of biting between the node rings inside thereof, so that if the bending operation is performed as it is, the bending mechanism is significantly unreasonable. It may apply force and cause a failure or accident.

In order to prevent such an inconvenience, there is also a non-return valve provided with a manual bypass valve for communicating the inside and the outside of the endoscope through the check valve and the inside / outside communication valve (Japanese Patent Laid-Open No. HEI 5). -253168).

However, even in such a case, if the bypass valve is forgotten to be manually operated before the check valve is removed from the endoscope, the internal pressure of the endoscope remains low, and the same inconvenience as the above occurs. Resulting in.

Therefore, according to the present invention, the endoscope can be placed in a vacuum sterilization chamber so that the flexible coating portion does not burst, and after the pressure sterilization, the internal pressure of the endoscope is automatically brought close to the atmospheric pressure. An object of the present invention is to provide an internal pressure adjusting device for an endoscope, which enables the endoscope to be normally used without any trouble.

[0011]

In order to achieve the above object, the internal pressure adjusting device for an endoscope according to the present invention is an endoscope in which all partition walls for partitioning the outside are airtight. A check valve that allows gas to pass from the inside to the outside of the endoscope and does not allow gas to pass from the outside to the inside of the endoscope is detachably attached, and the check valve is usually closed and attached. An internal / external communication valve that opens by means of is provided in the partition of the endoscope so that the check valve can be detachably attached to the internal / external communication valve, and the check valve can be removed from the internal / external communication valve. At the time of operation, the internal / external communication valve and the check valve are forcibly opened at the same time, and a forced communication process for communicating the inside and the outside of the endoscope is provided.

The check valve may not be able to maintain the forced communication process when no external force is applied. Further, the inside / outside communication valve is provided to a light guide connector that is detachably connected to the light source device, and in a state where the check valve is attached to the inside / outside communication valve, the connection of the light guide connector to the light source device is It may be blocked.

In the internal pressure adjusting device for an endoscope, when the check valve is attached to the inner / outer communication valve, the inner / outer communication valve is mechanically fixed in an open state. May be.

The internal pressure adjusting device for an endoscope according to the present invention is
An endoscope in which all partition walls that partition the outside are airtight, and a check valve is provided that allows gas to pass from the inside of the endoscope to the outside and does not allow gas to pass from the outside to the inside of the endoscope. In the above, a detachable adapter is provided for the check valve, and the check valve is forcibly opened during the operation of removing the adapter from the check valve and the inside of the endoscope It is characterized in that a forced communication process is established to allow communication between the outside and the outside.

[0015]

Embodiments will be described with reference to the drawings. In FIG. 2, reference numeral 1 is an endoscope, 2 is an operation portion thereof, and 3 is an insertion portion formed of a flexible tube. A bending portion 4 which is bendable by a remote operation from the operation portion 2 is formed on the distal end side of the insertion portion 3. Reference numeral 5 denotes a bending operation knob provided on the operation unit 2.

Since the curved portion 4 is bent with a small radius of curvature, it is covered with a flexible rubber tube. A tip portion main body 6 having an objective optical system and the like built therein is connected to the front side of the bending portion 4.

In addition to the eyepiece 8 projecting from the operating portion 2, a light guide flexible tube 9 having a light guide connector 10 connected to a light source device (not shown) at its tip is connected. There is.

In the thus constructed endoscope 1, all partition walls with the outside are made airtight by packing, an O-ring and the like, and the inside from the inside of the curved portion 4 to the inside of the light guide connector 10 is entirely formed. Is in communication with. However, the light guide connector 10 is provided with an internal / external communication valve 20 which is opened and closed by attaching and detaching the check valve adapter 30.

As shown in FIG. 3, the internal / external communication valve 20.
Is attached to a mounting seat 22 having a communication hole 21 communicating with the inside of the light guide connector 10. The valve body 25, which is arranged so as to be capable of advancing and retreating so as to face the outer opening of the communication hole 21, is biased outward by the weak compression coil spring 24 and is pressed against the valve receiver 26.

At the contact portion between the valve body 25 and the valve support 26,
An O-ring 27 for sealing is attached. Also valve body 2
A notch 25a is formed in the outer edge portion of No. 5 so that the front and back thereof communicate with each other.

Reference numeral 25b denotes a ventilation passage formed in the valve body 25 so that the valve body 25 does not block the communication hole 21.
Is a pin projecting on the outer wall of the valve support 26 for engaging adapters mounted on the valve support 26 from the outside.

Therefore, the valve body 25 is normally the valve seat 26.
The light guide connector 10 is closed between the inside and the outside by the O-ring 27. When the valve body 25 is pushed inward from the outside against the spring force of the compression coil spring 24, the valve body 25 receives the valve support 2
Apart from 6, the inside and the outside of the light guide connector 10, that is, the inside and the outside of the endoscope 1 communicate with each other.

A check valve adapter 30 is removably attached to the internal / external communication valve 20.
Adapter cylinder 31 mounted so as to cover the valve support 26 of
A guide groove 32 that engages with the pin 28 on the inner / outer communication valve 20 side is formed in the inner mouth portion of the. 33 is a valve seat 2
It is an O-ring for sealing that is closely attached to the outer surface of 6.

A check valve 36 urged by a strong compression coil spring 37 is pressed toward a valve seat 31a formed in a taper shape in the adapter cylinder 31, and the check valve 36 and the valve seat 31a are connected to each other. An O-ring 38 for sealing is attached to the abutting portion.

At the center of the tip of the check valve 36, a push rod 34 for pushing the valve body 25 is integrally projected. As a result, when the check valve adapter 30 is attached to the internal / external communication valve 20, the push rod 34 pushes the valve body 25 open.

The check valve 36 is loosely fitted to the inner peripheral surface of the check valve support cylinder 39 which is screwed to the adapter cylinder 31 so as to support the check valve 36 and the compression coil spring 37. 36
A notch 36a is formed in the outer edge portion of the so as to communicate the spaces in front of and behind it. Also, the check valve support cylinder 39
A ventilation passage 39a is provided on the outer end surface of the check valve adapter 30 so that the inside and outside of the check valve adapter 30 communicate with each other.

The guide groove 32, as shown in FIG.
A rotary guide portion 32b bent in a dogleg shape is formed continuously from the open end of the adapter cylinder 31 to the linear guide portion 32a formed in the axial direction.

Therefore, when the check valve adapter 30 is attached to the internal / external communication valve 20, the pin 2 of the internal / external communication valve 20 is attached.
The pin 8 is first guided straight inside the straight guide portion 32a, and then the check valve adapter 30 is rotated around the axis, whereby the pin 28 is guided into the rotation guide portion 32b.

Then, by guiding the pin 28 to the opposite end portion (A portion) of the rotation guide portion 32b, the check valve adapter 3
0 is firmly engaged with the internal / external communication valve 20 so as not to come off.

FIG. 5 shows a state in which the check valve adapter 30 is attached to the inner / outer communication valve 20. In this state, the push rod 34 on the side of the check valve adapter 30 is connected to the internal / external communication valve 2
Since the compression coil spring 37 on the check valve adapter 30 side is stronger than the compression coil spring 24 on the inner / outer communication valve 20 side, the compression coil spring 24 on the inner / outer communication valve 20 side is further broken. When compressed, the valve body 25 is pushed into the internal / external communication valve 20 and separated from the valve support 26, and is always in an open state.

When the pressure of the outside air becomes lower than the inner pressure of the light guide connector 10 by a certain amount or more, the check valve 36 is pushed up against the urging force of the compression coil spring 37 due to the pressure difference, and as a result, FIG. The air inside the light guide connector 10 flows outward by the path indicated by the arrow, and the internal pressure of the endoscope 1 decreases.

On the contrary, when the internal pressure of the light guide connector 10 is lower than or equal to the external pressure, the check valve 36 is pressed against the valve seat 31a, and the O-ring 38 separates the inside and outside of the light guide connector 10. Since the light guide connector 10 is blocked, air and steam do not flow from the outside to the inside.

Therefore, if the check valve adapter 30 is attached to the internal / external communication valve 20, when the endoscope 1 is put into the reduced pressure sterilization chamber for sterilization and the air pressure in the sterilization chamber becomes low, the Air flows out from the endoscope, and the internal pressure of the endoscope is maintained in a state not higher than the external pressure. Therefore, the flexible covering portion does not swell and burst. The same applies when the endoscope is placed in a high temperature environment.

After the endoscope 1 has been sterilized under reduced pressure and the endoscope 1 is taken out from the sterilization chamber, the check valve adapter 30 is removed from the inner / outer communication valve 20. The operation is completely opposite to the operation at the time of attachment, and the check valve adapter 30 may be rotated and then pulled so that the pin 28 can be removed from the guide groove 32 through the straight guide portion 32a from the rotation guide portion 32b. .

During the operation, as shown in FIG. 4, the pin 28 always has a dogleg-shaped rotation guide portion 32b.
It passes through the central convex part (B part). Then, at that position,
As shown in FIG.
Since it deeply engages with 0, the bottom of the valve body 25 first comes into contact with the mounting seat 22, and the check valve adapter 30 is guided to a position deeper than that, thereby pushing the push rod 34.
The check valve 36 is pushed open in the direction of contracting the compression coil spring 37 via the, and separates from the valve seat 31a.

As a result, both the internal / external communication valve 20 and the check valve adapter 30 are forcibly opened, and between the inside of the light guide connector 10 and the outside air, that is, between the inside and outside of the endoscope 1. The spaces are forcibly communicated with each other, and the internal pressure of the endoscope 1 approaches the atmospheric pressure.

In this way, when the check valve adapter 30 is removed from the internal / external communication valve 20, the inside of the endoscope 1 is always in communication with the outside air during the operation, and the inside of the endoscope is in a state close to vacuum. The internal pressure of the endoscope 1 suddenly becomes a pressure close to the atmospheric pressure.
Then, when the check valve adapter 30 is removed from the internal / external communication valve 20, the valve body 25 is closed together with it, so that the endoscope 1 is brought into an airtight state again.

Incidentally, the pin 28 is B of the rotation guide portion 32b.
The internal / external communication state in the portion is unstable due to the inclined surface of the rotation guide portion 32b and the biasing force of the compression coil spring 37, and therefore cannot be maintained unless the check valve adapter 30 is pressed by a human hand or the like. Therefore, there is no possibility that the endoscope 1 is immersed in cleaning water or the like in a state where the endoscope 1 is in communication with the outside and a water leakage accident occurs.

As shown in FIG. 7, when the light guide connector 10 is connected to the light source device with the check valve adapter 30 attached to the light guide connector 10, the check valve adapter 30 causes the check valve adapter 30 to be connected to the light source device. The light guide connector 10 cannot be connected to the light source device 50 because it hits the edge of the recess 51 at the mouth of the connection portion of 50.

Therefore, there is no possibility that the endoscope 1 is used with a low internal pressure and a failure or accident occurs. If the check valve adapter 30 is removed, the light guide connector 10
Of course, can be connected to the light source device 50.

FIG. 8 shows a check valve adapter 30 according to a second embodiment of the present invention, which has a cylindrical outer frame 42 that engages with a pin 41 axially implanted in an adapter cylinder 31. The check valve adapter 30 is enclosed.

By doing so, the mechanism inside does not rotate relative to the outer frame 42 held by the hand, but it can move in the axial direction, so the check valve adapter 30 for the inner / outer communication valve 20. It is possible to easily attach and detach.

FIG. 9 shows a third embodiment of the present invention. In addition, in the portion having the same function as the first embodiment,
The same reference numerals as those in the first embodiment are attached to each and detailed description thereof is omitted.

In this embodiment, a push rod 34 forcibly opening the valve body 25 of the internal / external communication valve 20 is fixedly provided on the adapter cylinder 31 of the check valve adapter 30.
A ventilation hole 44 is formed around it.

Therefore, when the check valve adapter 30 is attached to the inner / outer communication valve 20, the valve body 25 is pushed by the push rod 34 and is mechanically fixed in an open state.
As a result, the check valve 36 in the check valve adapter 30 is biased only by the compression coil spring 37, so that the operation is stable, and a relatively weak spring may be used as the compression coil spring 37.

An outer cylinder 45 is rotatably fitted around the shaft on the outside of the adapter cylinder 31, and a lower end portion of a retaining lid 48 fixed by a screw 46 on the projecting end side of the adapter cylinder 31. The outer cylinder 45 is pressed so as not to move in the axial direction.

X-rings 49, 49 for sealing are mounted between the inner peripheral surface of the outer cylinder 45, the outer peripheral surface of the retaining lid 48 and the outer peripheral surface of the adapter cylinder 31, respectively. The mating surface is sealed to prevent resistance to rotational movement.

A guide groove 32 that engages with a pin 28 provided on the outer surface of the inner-outer communication valve 20 is formed in the outer cylinder 45. However, the shape is different from that of the first embodiment, as shown in FIG.
As shown in FIG. 3, it is formed in a simple L-shape. The length (rotation angle) in the circumferential direction is θ degrees.

A vertical groove 51 that engages with the pin 28 inside the guide groove 32 of the outer cylinder 45 is formed in the adapter cylinder 31 so as to be straight in the axial direction, as shown in FIG.
Therefore, the adapter cylinder 31 does not rotate with respect to the inner / outer communication valve 20, and only the outer cylinder 45 rotates with the angle θ in a state where it does not move in the axial direction with respect to the inner / outer communication valve 20.

In the middle position of the check valve adapter 30, the second
A pin 52 of the check valve 36 projects laterally from the check valve 36, and grooves 53 and 54 that engage with the second pin 52 of the check valve 36 are formed in the outer cylinder 45 and the adapter cylinder 31.

The outer cylinder 45 is engaged with the second pin 52.
The groove formed in is a simple vertical groove 53. Therefore, when the outer cylinder 45 is rotated, the second pin 52 rotates together with the outer cylinder 45 in a state of being freely movable in the axial direction.

On the other hand, the groove formed in the adapter cylinder 31 so as to engage with the second pin 52 resists the urging force of the compression coil spring 37, as shown in FIG.
2 is a cam groove 54 for lifting 2.

In FIG. 12, A shows a position where the check valve adapter 30 is attached to the inner / outer communication valve 20 and the outer cylinder 45 is rotated, and the second pin 52 urged by the guide groove 32 is shown. Is located toward the bottom of the cam groove 54.

In this state, the check valve 36 is closed,
The second pin 52 can move in the cam groove 54 in the axial direction of the check valve adapter 30 (vertical direction in the drawing), so that when the external pressure becomes lower than the internal pressure of the endoscope 1 by a certain amount or more, The stop valve 36 moves in the opening direction against the biasing force of the compression coil spring 37.

The cam surface of the cam groove 54 has a slope 54a for pushing up the second pin 52 from its A position, and a flat surface 54b for keeping the second pin 52 in the pushed up position.
It is formed by.

The length of the cam groove 54 is θ in terms of rotation angle, and B rotated by θ from A is the position where the check valve adapter 30 is attached to and detached from the internal / external communication valve 20. Therefore, in the range P from the middle of the slope 54a to B,
As shown in FIG. 13, the check groove 3 is formed by the cam groove 54.
6 is forcibly opened.

In the third embodiment constructed as described above, when the check valve adapter 30 is attached to the inner / outer communication valve 20 and the outer cylinder 45 is rotated, the adapter cylinder 31 does not rotate at all, and FIG. As shown, the second pin 52 protruding from the check valve 36 rotates by the angle θ.

Then, in the most range P except the position where the cam groove 54 is rotated to the end, the check valve 36 is mechanically forcibly opened. Therefore, during the operation of removing the check valve adapter 30 from the internal / external communication valve 20,
The ventilation operation is performed so that the internal pressure of the endoscope 1 approaches the external pressure. When the check valve adapter 30 is removed from the inner / outer communication valve 20, the valve body 25 of the inner / outer communication valve 20 is closed.

In this embodiment, a vent hole 56 is formed in the projecting end of the retaining lid 48, and a waterproof sheet 57 made of a porous film is attached to the opening. Therefore, it is possible to prevent moisture from entering the inside from the outside.

However, due to the presence of the waterproof sheet 57,
Breathability is also much slower. Therefore, in order to prevent the operation of removing the check valve adapter 30 from the inner / outer communication valve 20 from being performed too quickly, for example, as shown in FIG. 15, an intermediate portion of the guide groove 32 formed in the outer cylinder 45 is provided. It is advisable to provide a click mechanism for providing a step or resistance, a scale for visual inspection, or the like.

Further, the operation time for removing the check valve adapter 30 in which the internal pressure of the endoscope is adjusted as described above can be changed by appropriately selecting the rotation angle θ of the outer cylinder 45. By setting to an appropriate angle, it is possible to arbitrarily set the length of time during which the internal pressure is adjusted.

As shown in FIG. 16, the check valve 3
If the cam groove 54 is formed in a shape in which the range P in which 6 is forcibly opened is only the middle portion of the cam groove 54, the internal pressure adjustment time can be shortened.

In the third embodiment, the check valve 3
Although the cam groove 54 for forcibly opening 6 is formed in the adapter cylinder 31 and the vertical groove 53 is formed in the outer cylinder 45, it may be reversed. In that case, the cam groove 5 formed in the outer cylinder 45
The shape of No. 4 is, as shown in FIG.
It becomes symmetrical with the case of being formed.

FIG. 18 shows a fourth embodiment of the present invention, in which the endoscope 1 is not provided with the internal / external communication valve 20, and the check valve 36 is provided in the light guide connector 10 of the endoscope 1. The present invention is applied to a direct attachment.

Then, a retaining lid 48 is integrally attached to an outer cylinder 45 similar to that of the third embodiment, and is attached to a check valve cylinder 131 corresponding to the adapter cylinder 31 of the third embodiment. It is formed into a removable adapter. FIG. 19 shows a state in which the adapter has been removed.

The pin 28 is provided so as to project from the check valve cylinder 131, and the guide groove 32 that engages with the check valve cylinder 131 is formed in the outer cylinder 45. The vertical groove 53 and the cam groove 54 with which the second pin 52 protruding from the check valve 36 engages, the outer cylinder 45 and the check valve cylinder 13.
1 is the same as that of the third embodiment.

The other structure is almost the same in function as that of the third embodiment, and therefore, the same reference numerals are given and detailed description thereof will be omitted. Reference numeral 60 denotes a spring receiver that receives one end of the compression coil spring 37.

With such a configuration, during the operation of removing the outer cylinder 45, which is the adapter, from the attached state, as shown in FIG. 20, as in the third embodiment, the check valve is performed. 36 is forcibly opened.

In this fourth embodiment, FIG.
If the cam groove 54 as shown in FIG. 4 is formed in the outer cylinder 45 and the vertical groove 53 is formed in the check valve cylinder 131, the opening area of the side wall of the check valve cylinder 131 becomes small, and foreign matter or the like is hard to collect. There are advantages.

[0070]

According to the present invention, when the check valve is removed from the internal / external communication valve provided in the partition wall of the endoscope,
The internal / external communication valve and the check valve are forcibly opened simultaneously so that the inside and outside of the endoscope communicate with each other.Therefore, when the check valve is removed from the endoscope, the internal pressure of the endoscope is reduced. Is always close to atmospheric pressure.

Therefore, by attaching a check valve to the internal-external communication valve, the endoscope can be placed in the vacuum sterilization chamber so that the flexible covering portion does not rupture, and if the check valve is removed after vacuum sterilization, the internal valve can be removed. The internal pressure of the endoscope automatically approaches the atmospheric pressure, and the endoscope can be normally used without any trouble.

In the case where the check valve is directly attached to the partition wall of the endoscope, the check valve is forcibly opened during the operation of removing the adapter from the check valve, and the endoscope is Since the inside and outside of the mirror communicate with each other, the internal pressure of the endoscope always approaches the atmospheric pressure, and the endoscope can be normally used without any trouble.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an internal / external communication state in the middle of removal of a check valve adapter of a first embodiment.

FIG. 2 is a side view of the endoscope according to the first embodiment.

FIG. 3 is a longitudinal sectional view of the check valve adapter of the first embodiment with the check valve adapter removed.

FIG. 4 is a front view of the check valve adapter of the first embodiment.

FIG. 5 is a vertical cross-sectional view showing a state in which the check valve adapter of the first embodiment is connected.

FIG. 6 is a vertical cross-sectional view showing a state in which the check valve adapter of the first embodiment is connected.

FIG. 7 is a perspective view of a connection portion with the light source device according to the first embodiment.

FIG. 8 is a vertical sectional view of a check valve adapter according to a second embodiment.

FIG. 9 is a vertical cross-sectional view showing a state where the check valve adapter of the third embodiment is connected.

FIG. 10 is a development view of a guide groove according to a third embodiment.

FIG. 11 is a front view of a vertical groove according to a third embodiment.

FIG. 12 is a development view of a cam groove according to a third embodiment.

FIG. 13 is a vertical cross-sectional view of an internal / external communication state during the removal of the check valve adapter of the third embodiment.

14 is a cross-sectional view taken along the line XIV-XIV in FIG.

FIG. 15 is a development view of another example of the guide groove of the third embodiment.

FIG. 16 is a development view of another example of the cam groove of the third embodiment.

FIG. 17 is a development view of another example of the cam groove of the third embodiment.

FIG. 18 is a vertical sectional view showing a state in which the adapter of the fourth embodiment is connected.

FIG. 19 is a vertical cross-sectional view showing a state where the adapter of the fourth embodiment is removed.

FIG. 20 is a vertical cross-sectional view showing an internal / external communication state during the removal of the adapter of the fourth embodiment.

FIG. 21 is a development view of another example of the cam groove of the fourth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Endoscope 10 Light guide connector 20 Internal / external communication valve 25 Valve body 30 Check valve adapter 34 Push rod 36 Check valve

Claims (5)

[Claims] 1. A non-return check for preventing gas from passing from the inside to the outside of the endoscope in an endoscope in which all partition walls for partitioning the outside are airtightly configured. In the case where the valve is detachably attached, an internal / external communication valve that is normally closed and is opened when the check valve is attached is provided in the partition wall of the endoscope, and The check valve is detachably attached, and when the check valve is removed from the inner / outer communication valve, the inner / outer communication valve and the check valve are forcibly opened simultaneously. An internal pressure adjusting device for an endoscope, comprising a forced communication process for communicating the inside and the outside of the endoscope. 2. The internal pressure adjusting device for an endoscope according to claim 1, wherein the check valve cannot maintain the forced communication process when no external force is applied. 3. The inside / outside communication valve is provided in a light guide connector which is detachably connected to a light source device, and the check valve is attached to the inside / outside communication valve,
The internal pressure adjusting device for an endoscope according to claim 1, wherein connection of the light guide connector to the light source device is prevented. 4. The endoscope according to claim 1, wherein the inner / outer communication valve is mechanically fixed in an open state when the check valve is attached to the inner / outer communication valve. Internal pressure adjustment device. 5. An endoscope in which partition walls for partitioning with the outside are all airtightly configured, and a non-return valve which does not allow gas to pass from the inside to the outside of the endoscope. In the case where a valve is provided, an adapter that is detachable from the check valve is provided, and the check valve is forcibly opened when the adapter is removed from the check valve. An internal pressure adjusting device for an endoscope, characterized in that a forced communication process is provided for communicating the inside and the outside of the endoscope.