JP4805559B2 - Endoscope internal pressure adjustment device - Google Patents

Description

  The present invention relates to an internal pressure adjusting device provided in a connector portion of an endoscope.

  In general, a medical endoscope is provided with an internal pressure adjusting device. For example, when performing EOG sterilization of an endoscope, the internal pressure adjusting device is opened to release the internal pressure. Also, in the airtight inspection of the endoscope, connect a ventilation hose to the internal pressure adjustment device, immerse the endoscope in water, supply gas from the ventilation hose to the inside of the endoscope, and whether bubbles are released. By checking whether or not, cracks are discovered.

  Conventionally, as an internal pressure adjusting device, a rotating body and a valve body have been provided. When the rotating body is rotated by an adapter such as a ventilation hose, the valve body moves outward to open the opening of the main body and rotate the rotating body in the reverse direction. In this case, a configuration has been proposed in which the valve body moves inward and the opening of the main body is closed (see, for example, Patent Document 1). In addition, a spring that biases the valve body inward is provided, and when the rotating body is rotated by an adapter, the valve body is moved outward against the elastic force of the spring, and the opening of the main body opens. Have been proposed (see, for example, Patent Document 2). In addition, a valve body is used to block the opening of the main body from the inside, and a spring that biases the valve body toward the opening is provided. The spring body is pushed against the elastic force of the spring by pushing the valve body with a pin provided on the adapter. A structure in which the valve body is moved inward to open the opening is known (see, for example, Patent Documents 3 and 4).

No. 7-41441 JP-A-8-317897 Japanese Patent No. 3193444 Japanese Patent Laid-Open No. 5-23287

  However, in the internal pressure adjusting device described in Japanese Utility Model Publication No. 7-41441, the valve body may move to the outside due to the internal pressure, and the opening of the main body may naturally open. Such a phenomenon may occur, for example, when transporting in an airplane or highland, when EOG sterilization is performed under low pressure without releasing the internal pressure, or when the endoscope becomes hot during storage, This can occur in many situations, such as when the opening is closed without releasing the internal pressure that was high after the test. Further, when a spring is provided as in the internal pressure adjusting device described in JP-A-8-317897, JP-A-3193444, and JP-A-5-23287, the spring can be caught and the valve body can be urged. There was a risk that the opening could not be closed. If the opening of the main body is opened in this way, there is a risk that liquid or the like enters the endoscope from the opening and the endoscope is damaged.

  An object of the present invention is to provide a highly reliable internal pressure adjusting device capable of reliably closing an opening.

  In order to solve the above-described problem, according to the present invention, an internal pressure adjusting device for adjusting internal pressure by communicating the inside and the outside of an endoscope, and providing an opening for communicating the inside and the outside of the endoscope. A main body, a rotating body rotatable with respect to the main body, and a valve body that opens and closes the opening from the inner side of the main body by moving inside the main body, and the rotation of the rotating body and the valve body The movement is interlocked, the rotating body is rotated in one rotation direction, the valve body is moved to the opening and brought into close contact with the inside of the main body to close the opening, and the rotating body is rotated in the other rotation direction. An internal pressure adjusting device for an endoscope is provided in which the opening is opened by rotating the valve body to the inside of the main body.

  In this internal pressure adjusting device, an engagement hole for engaging an engagement pin provided in the adapter is provided in the rotating body, the adapter and the rotating body are engaged, and the adapter is rotated, The rotating body may be configured to rotate, and the main body may be provided with an engaging pin holding portion that holds the engaging pin so as not to be removed from the engaging hole when the opening is opened. In addition, a female screw part is provided on the inner surface of the rotating body, a male screw part that is screwed with the female screw part is provided on the outer surface of the valve body, and the female screw part is rotated with respect to the male screw part. Thus, the male screw portion may be moved.

  According to the present invention, by closing the valve body in close contact with the opening of the main body from the inside, even if the internal pressure becomes higher than the external pressure, the valve body does not leave the opening and the opening opens naturally. Can be prevented. Further, since no spring is used, there is no possibility that the opening may not be closed due to the spring being caught. Therefore, the opening can be reliably opened and closed, and the reliability of the internal pressure adjusting device can be improved. In addition, it is possible to prevent the endoscope from being damaged due to liquid entering from the opening.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the endoscope 1 includes a flexible elongated insertion portion 2 that is inserted into a body cavity, and an operation portion 3 that is connected to the proximal end of the insertion portion 2. The distal end portion 2a of the insertion portion 2 is provided with an illumination window for irradiating illumination light, an imaging window, a supply port for ejecting liquid, pigment, and the like. A cord portion 4 is connected to the operation portion 3, and a connector portion 5 to which cables, tubes and the like of various external devices are connected is connected to the base end of the cord portion 4. The connector portion 5 is provided with an internal pressure adjusting device 10 according to the present invention.

  FIG. 2 shows a cross-sectional view of the internal pressure adjusting device 10. The internal pressure adjusting device 10 includes a main body 11 fixed to the outer shell of the connector portion 5. In FIG. 2, an opening 12 is provided on the upper surface of the main body 11 to communicate the inside and outside of the endoscope. Inside the main body 11, there are provided a rotating body 13 that can rotate in the circumferential direction with respect to the main body 11 and a valve body 15 that opens and closes the opening 12 from the inside of the main body 11. The rotation of the rotating body 13 and the movement of the valve body 15 are interlocked, and the valve body 15 moves along the axial direction (vertical direction in FIG. 2) as the rotating body 13 rotates.

  Inside the main body 11, an O-ring 17 for sealing between the rotating body 13 is provided. The rotating body 13 can rotate inside the main body 11 around the central axis A oriented in the vertical direction while maintaining a state in which the rotating body 13 is sealed with the O-ring 17.

  The valve body 15 is disposed along the central axis A in the shaft hole 20 provided in the central portion of the rotating body 13. The upper end portion side of the valve body 15 protrudes above the shaft hole 20, and the opening 12 is closed by a head portion 25 formed at the upper end portion of the valve body 15.

  The head 25 includes an O-ring 26 having an annular shape and having elasticity. The O-ring 26 is provided along the outer periphery of the head 25. On the other hand, the opening 12 is provided with a tapered portion 27 along the lower edge portion (inner side edge portion) of the opening 12. The taper portion 27 is formed so as to expand toward the outer peripheral side as it goes downward. By bringing the O-ring 26 into close contact with the tapered portion 27 from below (inside), the atmosphere inside the main body 11 and the atmosphere outside the opening 12 can be surely blocked.

  On the outer peripheral surface of the valve body 15, a left-handed male threaded portion 31 is formed at a portion disposed in the shaft hole 20. On the other hand, on the inner peripheral surface of the shaft hole 20, a female screw portion 32 that is screwed with the male screw portion 31 is formed. The male screw portion 31 and the female screw portion 32 are formed along a winding direction in which the center axis A is the center and the left-handed direction is a vertical direction. That is, when the male screw portion 31 is rotated relative to the female screw portion 32 in the left direction as viewed from above, the male screw portion 31 moves in a winding direction relatively lower than the female screw portion 32. It has become.

  The lower end side of the valve body 15 protrudes below the shaft hole 20 and is disposed toward the internal space of the connector portion 5. In addition, a regulation plate 41 that regulates the rotation of the valve body 15 is provided at the lower end of the main body 11. As shown in FIG. 3, flat surfaces 42 and 42 are provided on the left and right sides of the outer peripheral surface on the lower end side of the valve body 15, respectively. The flat surfaces 42 and 42 are formed in parallel with the axial direction of the valve body 15. On the other hand, the restricting plate 41 is provided with a substantially rectangular guide hole 43, the lower end portion of the valve body 15 is disposed so as to pass through the guide hole 43, and the edge portion of the guide hole 43 is each flat surface 42. , 42 are in contact with each other. Therefore, the valve body 15 cannot be rotated in the circumferential direction. In addition, the valve body 15 can be raised and lowered while sliding the flat surfaces 42 and 42 in the vertical direction along the guide holes 43 in FIG.

  As shown in FIG. 2, the valve body 15 is provided with a communication passage 45 so as to penetrate the inside of the valve body 15. One end of the communication passage 45 is opened on the outer peripheral surface of the valve body 15 above the male screw portion 31 and below the O-ring 26. The other end of the communication path 45 opens to the lower surface of the valve body 15 and communicates with the internal space of the connector portion 5. Therefore, the inside of the main body 11 and the inside of the connector portion 5 are in communication with each other via the communication path 45.

  On the outer wall of the main body 11, two engagement pin guiding grooves 51A and 51B for guiding engagement pins 62A and 62B of the adapter 60 described later are opened. In addition, two engagement holes 52A and 52B for engaging engagement pins 62A and 62B of the adapter 60 described later are provided on the outer peripheral surface of the rotating body 13. Each engagement hole 52A, 52B is disposed inside the engagement pin guide groove 51A, 51B, respectively.

  FIG. 4 shows a perspective view of the internal pressure adjusting device 10. As shown in FIG. 4, the engagement pin guide groove 51 </ b> A is formed in a substantially L shape, and in FIG. 4, the vertical guide portion 56 formed in the vertical direction and the lower end of the vertical guide portion 56 to the outer periphery of the main body 11. And a circumferential direction guiding portion 57 as an engaging pin holding portion formed along the direction. An upper end portion of the vertical guiding portion 56 is opened on the upper surface of the main body 11. Further, an upper surface opening 58 is formed on the upper surface of the main body 11 so as to extend from the upper end portion of the vertical guiding portion 56 toward the center side. The circumferential direction guiding portion 57 is formed so as to extend in the clockwise direction from the vertical guiding portion 56 when viewed from above. Since the engagement pin guide groove 51B has the same shape as the engagement pin guide groove 51A, description thereof is omitted.

  As shown in FIG. 4, the engaging hole 52A is formed in a concave shape from the outer peripheral surface of the rotating body 13 toward the center side and along the vertical direction, and the vertical guiding portion of the engaging pin guiding groove 51A. 56 and the circumferential direction guiding portion 57 are opened at substantially the same height. The upper end portion of the engagement hole 52 </ b> A opens to the upper surface periphery of the rotating body 13 and communicates with the upper surface opening 58. Since the engagement pin guide groove 51B has the same shape as the engagement pin guide groove 51A, description thereof is omitted.

  FIG. 5 is a transverse cross-sectional view of the internal pressure adjusting device 10 and shows a state where the internal pressure adjusting device 10 is cut along the circumferential direction guiding portion 57 of the engaging pin guiding grooves 51A and 51B. As shown in FIG. 5, when the engaging hole 52A is communicated with the vertical guiding portion 56 of the engaging pin guiding groove 51A, the engaging hole 52B is also simultaneously communicated with the vertical guiding portion 56 of the engaging pin guiding groove 51B. It is like that.

  FIG. 6 shows a longitudinal sectional view of the adapter 60 connected to the internal pressure adjusting device 10. The adapter 60 has a cylindrical shape, and a ventilation hose 61 is connected to one end, and the other end is open. The ventilation hose 61 is connected to a pressure device (not shown). Two engaging pins 62 </ b> A and 62 </ b> B project from the inner surface of the other end of the adapter 60. An O-ring 63 is provided along the inner peripheral surface of the adapter 60.

  Next, an operation method of the internal pressure adjusting device 10 of the endoscope 1 configured as described above will be described as an example in which an airtight inspection of the endoscope 1 is performed. First, the internal pressure adjusting device 10 in the normal state where the adapter 60 is not attached is in the closed state shown in FIG. The valve body 15 is disposed at a closing position P <b> 1 where the opening 12 is closed by the head 25. The O-ring 26 is in close contact with the tapered portion 27 of the opening 12 from the inside. Therefore, the opening 12 does not communicate with the communication path 45, and the inside and the outside of the connector portion 5 are not in communication. The engagement holes 52A and 52B of the rotating body 13 communicate with the vertical guide portions 56 and the upper surface opening portions 58 of the respective engagement pin guide grooves 51A and 51B. As shown in FIG. 7, the adapter 60 of the ventilation hose 61 is attached to the closed internal pressure adjusting device 10 so as to be covered from above. That is, the main body 11 of the internal pressure adjusting device 10 is inserted into the end opening of the adapter 60, and the engaging pins 62 A and 62 B of the adapter 60 are inserted into the upper surface openings 58 of the engaging pin guiding grooves 51 A and 51 B of the main body 11. To the vertical guiding portion 56 and the engaging holes 52A and 52B of the rotating body 13 from above. Thereby, each engagement pin 62A, 62B can be engaged with each engagement hole 52A, 52B, and the adapter 60 and the rotary body 13 can be connected. Further, the O-ring 63 is brought into close contact with the outer peripheral surface of the main body 11 so that the space between the adapter 60 and the outer peripheral surface of the main body 11 is sealed.

  When the engaging pins 62A and 62B are moved to the lower end of the vertical guiding portion 56, the adapter 60 is viewed from above, in the right rotation direction (that is, the direction opposite to the winding direction of the male screw portion 31 and the female screw portion 32). The engagement pins 62A and 62B are moved along the circumferential guide portions 57 (see FIG. 5) of the respective engagement pin guide grooves 51A and 51B. Then, the engagement holes 52A and 52B are moved together with the engagement pins 62A and 62B, and the rotating body 13 is rotated integrally with the adapter 60 in the clockwise direction. In FIG. 7, when the rotator 13 is rotated to the right when viewed from above, the female screw portion 32 rotates to the right with respect to the male screw portion 31 of the valve body 15 whose rotation is prevented by the restriction plate 41. That is, the male screw portion 31 rotates counterclockwise relative to the female screw portion 32. Accordingly, since the male screw portion 31 is guided by the female screw portion 32 so as to advance downward with respect to the female screw portion 32, the valve body 15 is moved downward from the closed position P1 toward the inside of the main body 11. . When the valve body 15 is lowered, the O-ring 26 is separated from the tapered portion 27 of the opening 12 and the opening 12 is opened.

  Further, the adapter 60 is rotated to the right, and the engaging pins 62A and 62B are moved until they abut against the distal end portions of the circumferential guiding portions 57 of the engaging pin guiding grooves 51A and 51B. It is set as the state connected to the front-end | tip part of the circumferential direction induction | guidance | derivation part 57 of the coupling pin induction grooves 51A and 51B (two-dot chain line in FIG. 5). At this time, the valve body 15 is disposed at the open position P2 where the head 25 is separated from the opening 12 as shown in FIG. That is, the opening 12 is opened, and the outside and the inside of the connector portion 5 communicate with each other through the opening 12, the internal space of the main body 11 and the communication path 45, and the internal pressure adjusting device 10 is opened. The engaging pins 62A and 62B are disposed in the circumferential direction guiding portions 57 of the engaging pin guiding grooves 51A and 51B and are held so as not to move upward. Accordingly, since the engaging pins 62A and 62B are fixed so as not to be disengaged from the engaging holes 52A and 52B, it is possible to prevent the adapter 60 from being detached from the internal pressure adjusting device 10.

  When the ventilation hose 61 is thus connected to the internal pressure adjusting device 10 via the adapter 60, the endoscope 1 is immersed in water, and a pressure device (not shown) is driven to supply gas into the ventilation hose 61 and pressurize it. The gas supplied from the ventilation hose 61 passes through the adapter 60, the opening 12, the main body 11, and the communication path 45, and is supplied into the connector portion 5. Since the internal spaces of the connector portion 5, the cord portion 4, the operation portion 3, and the insertion portion 2 (see FIG. 1) communicate with each other, when the gas is supplied from the ventilation hose 61, the entire interior of the endoscope 1 Is pressurized. If there is a crack or the like on the surface of the endoscope 1, bubbles are released into the water from there. Therefore, cracks and the like can be found depending on whether or not bubbles are generated.

  When the airtight inspection is performed in this manner, the endoscope 1 is taken out from the water, and the adapter 60 is removed from the internal pressure adjusting device 10. That is, in the internal pressure adjusting device 10 in the open state as shown in FIG. 8, the rotation direction is opposite to the rotation direction when the adapter 60 is attached to the internal pressure adjustment device 10, and the left rotation direction (that is, male screw). The engaging pins 62A and 62B of the adapter 60 are rotated in the circumferential direction guiding portions 57 of the engaging pin guiding grooves 51A and 51B of the main body 11 (see FIG. 5). ). The engagement holes 52A and 52B are moved together with the engagement pins 62A and 62B, and the rotating body 13 is rotated counterclockwise integrally with the adapter 60. When the rotating body 13 is rotated counterclockwise in this way, the female screw portion 32 rotates counterclockwise with respect to the male screw portion 31 of the valve body 15 that is prevented from rotating by the restriction plate 41. That is, the male screw portion 31 rotates to the right relative to the female screw portion 32. Therefore, since the male screw portion 31 is guided by the female screw portion 32 so as to advance upward with respect to the female screw portion 32, the valve body 15 moves upward from the open position P2. Then, as shown in FIG. 7, when the engaging pins 62A and 62B are moved to the vertical guiding portions 56 of the engaging pin guiding grooves 51A and 51B, the valve body 15 returns to the closed position P1. That is, the opening 12 is closed by moving the head 25 to the opening 12 and bringing the O-ring 26 into close contact with the tapered portion 27 from the inside of the main body 11. Thus, the internal pressure adjusting device 10 can be returned to the closed state. When the engaging pins 62A and 62B are moved to the vertical guiding portion 56, the adapter 60 is raised from the internal pressure adjusting device 10, and the engaging pins 62A and 62B are moved to the engaging holes 52A and 52B, the vertical guiding portion 56, and the upper opening 58. Extract from. Thus, only when the adapter 60 is attached, the valve body 15 can be raised and lowered to open and close the opening 12 from the inside, and the adapter 60 can be removed after the internal pressure adjusting device 10 is closed.

  In the closed position P2, the valve body 15 is in a state in which the upper portion of the O-ring 26 is brought into contact with the tapered portion 27 provided along the lower edge portion of the opening 12. There is no movement outside. Therefore, even if the valve body 15 is pressurized from the inside under a situation in which the internal pressure of the endoscope 1 is higher than the external pressure, the O-ring 26 is reliably pressed by the tapered portion 27, so that the opening 12 is opened. There is no end to it. In the closed state, the valve body 15 is securely supported by the male screw portion 31 and the female screw portion 32 that are screwed together, so that the valve body 15 is temporarily pushed from the outside of the opening 12 or the endoscope 1 Even when the internal pressure of the valve 15 becomes lower than the external pressure, the valve body 15 can be prevented from descending to the inside. Thus, it is possible to prevent the valve body 15 from opening away from the opening 12 except when the rotating body 13 is rotated by the adapter 60, and the opening 12 can be reliably closed. Therefore, the reliability of the internal pressure adjusting device 10 can be improved.

  According to the internal pressure adjusting device 1, the valve body 15 is moved from the inside of the main body 11 so as to close the opening 12, and the O-ring 26 is closed while being in close contact with the tapered portion 27. Even if the internal pressure of the endoscope 1 is higher than the external pressure, the O-ring 26 is pressed against the opening 12 and does not leave, so that the opening 12 can be prevented from opening naturally. Further, since the valve body 15 is forcibly opened and closed by rotating the rotating body 13 without using a biasing member such as a spring, there is no possibility that the opening 12 cannot be closed due to the spring being caught. Therefore, the opening 12 can be reliably opened and closed by rotating the rotating body 13, and the reliability can be increased. In addition, it is possible to prevent the endoscope 1 from being damaged by intrusion of liquid or foreign matter from the opening 12 that has been naturally opened.

  Although an example of a preferred embodiment of the present invention has been described above, the present invention is not limited to the embodiment described here. It will be obvious to those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

  In the present embodiment, the internal pressure adjusting device 10 is provided in the outer shell of the connector portion 5, but is not limited to the one provided in such a place. For example, in FIG. 1, the connector portion 5 is provided with a signal power supply 70 for transmitting a drive power source of an image pickup device such as a CCD provided at the distal end portion 2a and an output signal of the image pickup device. The waterproof cap attached to the signal port 70 is provided with an internal pressure adjusting device for connecting a ventilation hose to supply gas into the waterproof cap when inspecting the waterproof cap for cracks or gaps. There is something. The present invention can also be suitably applied to such an internal pressure adjusting device for a waterproof cap for signal ports.

  In the present embodiment, the male screw portion 31 and the female screw portion 32 are left-handed, and when the rotating body 13 is rotated to the right, the valve body 15 is lowered toward the inner side, and the rotating body 13 is rotated to the left. However, of course, the male screw portion 31 and the female screw portion 32 may have a right-handed shape (a winding direction in which the axial direction is a right-handed winding direction). In this case, the valve body 15 is lowered toward the inner side by rotating the rotating body 13 in the left rotation direction as viewed from above (that is, in the direction opposite to the winding direction of the male screw portion 31 and the female screw portion 32). The valve body 15 can be raised toward the opening 12 by rotating the rotating body 13 in the right rotation direction (that is, in the same direction as the winding direction of the male screw portion 31 and the female screw portion 32). Further, in this case, the circumferential direction guiding portion 57 in each of the engagement pin guiding grooves 51A and 51B may be formed so as to extend in the left rotation direction from the vertical guiding portion 56 as viewed from above. With this configuration, when the adapter 60 is attached, the valve body 12 is lowered to open the opening 12 by rotating the adapter 60 and the rotating body 13 counterclockwise, and when the adapter 60 is removed, the adapter 60 and the rotating body 13 are rotated clockwise. By this, the valve body 12 can be raised and the opening 12 can be closed.

  In the present embodiment, a female screw portion 32 is provided on the inner peripheral surface of the shaft hole 20, a male screw portion 31 is provided on the outer peripheral surface of the valve body 15, and rotation is achieved by screwing the female screw portion 32 and the male screw portion 31. Although the configuration in which the body 13 and the valve body 15 are interlocked with each other, the configuration in which the rotating body 13 and the valve body 15 are interlocked is not limited to such a configuration. For example, a guide groove is formed on the inner peripheral surface of the shaft hole 20 along the winding direction that turns counterclockwise with the axial direction as the traveling direction, and a pin that is movable in the guide groove is provided on the outer peripheral surface of the valve body 15. You may make it let it. Also in this case, when the rotating body 13 is rotated to the right, the pin of the valve body 15 is guided by the guide groove of the rotating body 13 and moved downward, so that the valve body 15 can be lowered. On the other hand, when the rotating body 13 is rotated counterclockwise, the pin of the valve body 15 is guided by the guide groove of the rotating body 13 and moved upward, so that the valve body 15 can be raised.

  In the present embodiment, the rotating body 13 is rotated by the adapter 60 of the ventilation hose 61 connected to the pressurizing device, and the adapter 60 is attached to the internal pressure adjusting device 10, but the adapter is not limited thereto. For example, an adapter having one end opened and opened to the atmosphere, or an adapter provided with a porous member may be used.

  The present invention can be applied to an internal pressure adjusting device provided in a connector portion of an endoscope.

It is explanatory drawing explaining the structure of an endoscope. It is a longitudinal cross-sectional view of an internal pressure adjusting device. It is a bottom view of an internal pressure adjusting device. It is a perspective view of an internal pressure adjusting device. FIG. 3 is a cross-sectional view of the internal pressure adjusting device taken along line BB in FIG. 2. It is a longitudinal cross-sectional view of an adapter. It is a longitudinal cross-sectional view of the internal pressure adjusting device in the closed state. It is a longitudinal cross-sectional view of the internal pressure adjusting device in an open state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Endoscope 5 Connector part 10 Internal pressure adjustment apparatus 11 Main body 12 Opening 13 Rotating body 15 Valve body 20 Shaft hole 31 Male thread part 32 Female thread part 41 Restriction plate 45 Communication path 60 Adapter 52A, 52B Engagement hole 51A, 51B Engagement Joint pin guide groove 62A, 62B Engagement pin

Claims (2)

An internal pressure adjusting device for adjusting internal pressure by communicating the inside and outside of an endoscope,
A body fixed to the endoscope and provided with an opening for communicating the inside and the outside of the endoscope;
A rotating body provided inside the main body, rotatable in a circumferential direction with respect to the endoscope and the main body, and having an internal thread portion on an inner surface;
A male threaded portion that is threadedly engaged with the female threaded portion on the outer surface ; and a valve body that opens and closes the opening from the inner side of the main body by moving within the main body, the female threaded portion and the male threaded portion In the region where the portion is screwed, a communication passage is provided which penetrates the inside of the valve body and communicates with the outer peripheral surface of the valve body on the side closer to the opening than the male screw portion,
By rotating the female screw portion with respect to the male screw portion, the male screw portion is moved, and the rotation of the rotating body and the movement of the valve body are interlocked,
Said rotary member is rotated in one rotational direction, are contacted by the inner side of the main body by moving the valve body in the opening, closing the opening,
Said rotary member is rotated in the other rotational direction, by moving the valve body inner side of the body, characterized by being configured to open the opening, the internal pressure adjusting device of the endoscope. The rotating body is provided with an engagement hole for engaging an engagement pin provided on the adapter,
The rotating body is rotated by engaging the adapter and the rotating body and rotating the adapter,
2. The endoscope according to claim 1, wherein the main body is provided with an engagement pin holding portion that holds the engagement pin so as not to be detached from the engagement hole when the opening is opened. 3. Internal pressure adjustment device.

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