An airtightness detection device for endoscope

Abstract

The present invention provides an airtightness detection device for an endoscope, comprising: a leak detection cap body, which is sealed and connected to the endoscope and communicates with the air path; an adapter assembly, which is sealed and connected to the leak detection cap body; a connector, a sealing sleeve arranged on the outside of the adapter assembly, which is sealed and connected to a pressure supply device and communicates with the air path; the adapter assembly includes a housing and an elastic valve assembly, the housing having an air flow channel connecting the leak detection cap body and the connector, the elastic valve assembly being built into the air flow channel, including a first end proximate to the connector and a second end proximate to the leak detection cap body; the elastic valve assembly, under the action of its own elastic force, has a first end and a second end that both seal and close the air flow channel, and when the pressure provided by the pressure supply device is greater than the elastic force of the elastic valve assembly, the first end drives the second end to move away from the first end to open the air flow channel. The airtightness device of the present invention can achieve a two-way self-locking seal when not detecting leaks on the endoscope, and can improve the leak detection efficiency when detecting leaks on the endoscope.

Description

Technical Field

[0001] The present invention relates to the technical field of endoscopes, and in particular to an airtightness detection device for an endoscope. Background Art

[0002] An electronic endoscope is an electronic optical instrument that can be inserted into a body cavity for direct observation, diagnosis, and treatment. Because electronic endoscopes operate on the human body, they require high standards for material and craftsmanship, resulting in a high price tag. Electronic endoscopes require repeated use, making equipment maintenance, testing, disinfection, and upkeep particularly crucial. Endoscope damage is a serious problem due to improper handling and testing and disinfection. Damage and leaks in electronic endoscopes can lead to the growth of bacteria and viruses, potentially creating cross-infection. Therefore, endoscopes must be leak-tested and disinfected before use.

[0003] Currently, the main leak detection method used for electronic endoscopes is the immersion leak detection method. This method is complex, time-consuming, requires a high level of experience, and has a certain degree of subjectivity in the test results. In contrast, the air pressure leak detection method has the advantages of being simple to operate, time-saving, and providing objective and accurate results. Patent CN 111964850A discloses an air pressure leak detection device for electronic endoscopes. By adjusting the air pressure and observing the changes in the barometer, the overall air tightness of the electronic endoscope can be tested. However, this leak detection device requires high machining accuracy for the surface roughness of the leak detection valve core, and the spring is prone to skew, causing the seal to fail at a certain edge. In addition, the seal is achieved by pressing the lower edge of the leak detection valve cover against the step of the leak detection valve body, which can easily break the sealing ring and cause the seal to fail.

[0004] In view of this, it is indeed necessary to propose an airtightness detection device for an endoscope to solve the above problems. Summary of the Invention

[0005] The object of the present invention is to provide an airtightness detection device for an endoscope, so as to solve the problem that the existing airtightness detection device for an endoscope is prone to sealing failure.

[0006] To achieve the above object, the present invention provides an airtightness detection device for an endoscope, comprising:

[0007] a leak detection cap body, which is sealed and connected to the endoscope and communicates with the air path;

[0008] An adapter assembly, sealed and connected to the leak detection cap;

[0009] The connecting piece and the sealing sleeve are arranged on the outside of the adapter assembly, are sealed and connected to the pressure supply device and communicate with the gas path;

[0010] The adapter assembly includes a housing and an elastic valve assembly, wherein the housing has an air flow channel connecting the leak detection cap and the connector, and the elastic valve assembly is built into the air flow channel and includes a first end close to the connector and a second end close to the leak detection cap;

[0011] Under the action of its own elastic force, the first end and the second end of the elastic valve assembly seal and close the airflow channel. When the pressure provided by the pressure supply device is greater than the elastic force of the elastic valve assembly, the first end drives the second end to move away from the first end to open the airflow channel.

[0012] As a further improvement of the present invention, the shell includes a first shell fixedly connected to the connecting piece and a second shell fixedly connected to the leak detection cap body, the air flow channel includes a first channel arranged in the first shell and connected to the air flow of the connecting piece, and a second channel arranged in the second shell and connected to the air flow of the leak detection cap body, the second shell is at least partially built into the first shell, and is sealed and fixedly connected to the first shell and is in air flow communication.

[0013] As a further improvement of the present invention, the elastic valve assembly includes a valve bonnet and a first elastic member arranged between the valve bonnet and the second shell. The valve bonnet is limitedly connected in the first shell and seals the first channel under the elastic force of the first elastic member.

[0014] As a further improvement of the present invention, a protrusion with a through hole is provided on a side of the connecting member facing the valve bonnet, and the protrusion abuts against the valve bonnet.

[0015] As a further improvement of the present invention, the first shell includes a first groove close to the valve bonnet and a second groove away from the valve bonnet, a first sealing ring is provided in the first groove, and the first sealing ring is configured to seal the first shell and the valve bonnet, and a second sealing ring is provided in the second groove, and the second sealing ring is configured to seal the first shell and the second shell.

[0016] As a further improvement of the present invention, the elastic valve assembly also includes a valve plug and a valve column assembly, the valve plug is built into the second shell and is sealed with the second shell, including a neck arranged close to the valve cap and a tail arranged away from the valve cap, the valve column assembly includes a rod passing through the valve plug and a top column and a seal arranged at both ends of the rod, the top column protrudes into the valve cap, and a second elastic member is provided between the top column and the side of the neck facing away from the tail, and a snap-fitting bevel is provided on the side of the tail facing the seal, and the snap-fitting bevel is sealingly abutted against the seal to seal the second channel.

[0017] As a further improvement of the present invention, the neck includes a central hole, the rod passes through the central hole, and the diameter of the central hole is larger than the diameter of the rod and smaller than the diameter of the top column.

[0018] As a further improvement of the present invention, the length of the valve plug is smaller than the length of the second shell, and there is a clearance space between the tail and the inner wall of the second shell. In the vertical direction, the height of the clearance space is greater than the height of the seal.

[0019] As a further improvement of the present invention, a third sealing ring is provided between the second housing and the valve plug, and a fourth sealing ring is provided between the second housing and the leak detection cap body.

[0020] As a further improvement of the present invention, the leak detection cap is detachably connected to the endoscope, and the adapter assembly is detachably connected to the leak detection cap and the connector respectively.

[0021] The beneficial effects of the present invention are as follows: the processing technology of the air tightness detection device for an endoscope of the present invention is simple. By arranging an elastic valve assembly in the air flow channel of the housing of the adapter assembly, and the elastic valve assembly, under the action of its own elastic force, both the first end and the second end seal and close the air flow channel, so that when the endoscope is not being leak tested, it can be used as a sealing plug, achieving a two-way self-locking seal, and extending the service life of the internal parts of the air tightness detection device. When leak testing the endoscope, the pressure provided by the pressure supply device is used to drive the elastic valve assembly to move to open the air flow channel, and the elastic force direction of the elastic valve assembly is stable, the overall sealing performance is strong, and the leak detection efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a stereoscopic diagram of an airtight device for an endoscope according to a preferred embodiment of the present invention.

[0023] Figure 2 yes Figure 1 sectional view of .

[0024] Figure 3 yes Figure 1 Enlarged view of the circled area.

[0025] Figure 4 yes Figure 1 A perspective view of the transfer connector assembly.

[0026] Figure 5 yes Figure 4 Exploded diagram of the structure.

[0027] Figure 6 yes Figure 1 A three-dimensional diagram of the connecting piece. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] It should be noted here that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the solutions of the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0030] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0031] See also Figure 1-6 As shown, an air tightness detection device 100 for an endoscope according to a preferred embodiment of the present invention is used for an electronic endoscope (not shown in the figure), is arranged at the leak detection location of the electronic endoscope, and is connected to an external pressure supply device (not shown in the figure), wherein a leak detector is provided on the pressure supply device.

[0032] The air tightness detection device 100 includes a leak detection cap body 1, an adapter assembly 2 and a connector 3. The leak detection cap body 1 is detachably connected to the endoscope, and is sealed and connected to the endoscope and communicates with the air path. The adapter assembly 2 is sealed and connected to both the leak detection cap body 1 and the connector 3. The connector 3 sealing sleeve is arranged on the outside of the adapter assembly 2, and is detachably connected to the pressure supply device and is sealed and communicates with the air path. The leak detection cap body 1 is detachably connected to the endoscope, and the connector 3 is detachably connected to the external leak tester and the pressure supply device, so as to improve the convenience of installation and disassembly of the air tightness detection device 100. The adapter assembly 2 is used to seal the leak detection cap body 1 and the connector 3 and form an air flow channel therebetween, thereby realizing the sealed connection and air path communication of the air tightness detection device 100. The adapter assembly 2 includes an elastic valve assembly 22, which is positioned within the airflow channel. Under the action of its own elastic force, the elastic valve assembly 22 can bidirectionally seal and close the airflow channel. When the endoscope is not being leak-tested, it can function as a sealing plug, achieving a bidirectional self-locking seal and extending the service life of the internal components of the airtightness testing device 100. When leak-testing the endoscope, the pressure provided by the pressure supply device automatically shifts the elastic valve assembly 22 to open the airflow channel. This automatically controls the airflow channel through the elastic valve assembly 22, improving the automated operation of the airtightness testing device 100. Furthermore, the elastic force of the elastic valve assembly 22 is stable in direction and not prone to skewing, resulting in strong overall sealing performance and high leak detection efficiency.

[0033] The leak detection cap body 1 includes a leak detection sealing cap 11 with a downward opening and a rotating member 12 disposed at the opening of the leak detection sealing cap 11. Preferably, the rotating member 12 is made of metal. The leak detection sealing cap 11 is sealed and fixedly connected to the rotating member 12. Preferably, the leak detection sealing cap 11 and the rotating member 12 are fixedly connected by screws and auxiliary glue. The rotating member 12 is detachably connected to the endoscope, and is provided with a first guide groove 121, which is used to cooperate with the first limiting post on the endoscope. Preferably, the first guide groove 121 is an arc groove, a spiral groove, or an L-shaped groove, and the lower end of the first guide groove 121 has a lower notch 1211, and the end of the first guide groove 121 has a snap-fit ​​position 1212. Preferably, multiple first guide grooves 121 are evenly arranged circumferentially on the side wall of the rotating member 12, and two symmetrical first limiting posts (not shown) are provided on the connector of the endoscope. This facilitates the disassembly and assembly of the airtight structure, and there is no directional requirement during installation.

[0034] See also Figure 2-5 As shown, the adapter assembly 2 includes a housing 21 and an elastic valve assembly 22 built into the housing 21. One end of the adapter assembly 2 is detachably and hermetically connected to the leak detection cap 1, and the other end is detachably and hermetically connected to the connector 3.

[0035] The housing 21 includes a first housing 211 fixedly connected to the connector 3 and a second housing 212 fixedly connected to the leak detection cap 1. The second housing 212 is at least partially built into the first housing 211 and is sealed and fixedly connected to the first housing 211 and communicates with the airflow.

[0036] Specifically, the first housing 211 and the second housing 212 are fixedly connected via a fixing pin 213. The fixing pin 213 sequentially passes through the second housing 212 and the first housing 211 and is exposed outside the first housing 211, thereby securing the first housing 211 and the second housing 212. A second groove 2121 is defined in the first housing 211 at a position corresponding to the second housing 212 (i.e., on a side away from the valve cap 223 of the elastic valve assembly 22). A second sealing ring 2122 is disposed within the second groove 2121. The second sealing ring 2122 is configured to seal the first housing 211 and the second housing 212, thereby achieving a sealed and fixed connection between the first housing 211 and the second housing 212.

[0037] The second housing 212 extends into the leak detection cap 1 toward one end thereof, and a thread is provided on the outer peripheral wall of the portion extending into the leak detection cap 1. The second housing 212 and the leak detection cap 1 are detachably connected via a nut 214. Preferably, a fourth groove 2123 is provided on the side of the second housing 212 facing the leak detection cap 1, and a fourth sealing ring 2124 is provided in the fourth groove 2123. That is, the fourth sealing ring 2124 is disposed between the second housing 212 and the leak detection cap 1 to prevent gas from escaping from the connection between the leak detection cap 1 and the second housing 212, thereby improving leak detection efficiency.

[0038] The first housing 211 includes a first channel 2111 in airflow communication with the connector 3. The second housing 212 includes a second channel 2125 in airflow communication with the leak detection cap 1. The first channel 2111 and the second channel 2125 are connected. In other words, the first channel 2111 and the second channel 2125 form an airflow channel within the housing 21, connecting the leak detection cap 1 and the connector 3. The elastic valve assembly 22 is built into the airflow channel and elastically blocks the first channel 2111.

[0039] Furthermore, the elastic valve assembly 22 includes a first end 221 near the connector 3 and a second end 222 near the leak detection cap body 1. The elastic valve assembly 22 also includes a valve cap 223 and a first elastic member 224 disposed between the valve cap 223 and the second housing 212. The valve cap 223 is disposed at the first end 221 and is limitedly connected to the first housing 211. The end of the first housing 211 near the connector 3 is bent toward the first channel 2111 to form a constricted portion 2112 and a limiting portion 2113, thereby dividing the first channel 2111 of the first housing 211 into a first region with a smaller area and a second region with a larger area. The valve cap 223 is disposed in the first region and includes a convex cap 2231 formed toward the connector 3 and a limiting arm 2232 disposed at the end of the convex cap 2231 away from the connector 3 and extending away from the first channel 2111. The convex cap 2231 protrudes into the constricted portion 2112 and, under the elastic force of the first elastic member 224, blocks the constricted portion 2112, thereby blocking the first channel 2111. Furthermore, a first groove 2114 is provided on the side of the first housing 211 facing the convex cap 2231 (i.e., the side near the valve bonnet 223). A first sealing ring 2115 is disposed within the first groove 2114. The first sealing ring 2115 is configured to seal the first housing 211 and the valve bonnet 223, thereby achieving a sealed connection between the first housing 211 and the valve bonnet 223. The provision of a limiting arm 2232 allows the limiting arm 2232 to engage the limiting portion 2113 on the first housing 211, preventing the valve bonnet 223 from moving out of the first area under the elastic force of the first elastic member 224, thereby improving operational safety.

[0040] In this embodiment, the first elastic member 224 is a spring with a large diameter, which is arranged between the limiting arm 2232 and the second housing 212, so that the valve cap 223 maintains the sealing of the first area under the action of its own elastic force, thereby sealing the side of the air flow channel close to the connector 3 (such as Figure 2 The left side (i.e., first end 221) is shown, preventing airflow from flowing between connector 3 and adapter assembly 2 without external force. By configuring first elastic member 224 as a large-diameter spring, compression and distorting of first elastic member 224 are avoided, thereby maintaining stable movement of valve cap 223 and improving sealing. Furthermore, since machining precision requirements for limit arm 2232 and second housing 212 are not required, manufacturing complexity is reduced.

[0041] Furthermore, the elastic valve assembly 22 also includes a valve plug 225 and a valve post assembly 226. The valve plug 225 is built into the second housing 212 and is sealed and fixedly connected to the second housing 212. A third groove 2251 is provided on the side of the valve plug 225 facing the second housing 212. A third sealing ring 2252 is provided in the third groove 2251. That is, the third sealing ring 2252 is disposed between the second housing 212 and the valve plug 225 and is configured to seal and fix the second housing 212 and the valve plug 225.

[0042] The valve plug 225 includes a neck portion 2253 disposed near the valve bonnet 223 and a tail portion 2254 disposed away from the valve bonnet 223. The neck portion 2253 extends from one end of the tail portion 2254 near the valve bonnet 223 toward the valve bonnet 223, and the tail portion 2254 is sealingly engaged with the second housing 212. Furthermore, the neck portion 2253 is disposed corresponding to the second passage 2125 of the second housing 212, thereby defining an air inlet 2256 between the neck portion 2253 and the tail portion 2254, facilitating airflow into the interior of the valve plug 225.

[0043] The valve post assembly 226 includes a rod 2261 that passes through the valve plug 225 and a top post 2262 and a limiting ring 2264 provided at both ends of the rod 2261. A sealing member 2263 is provided near the limiting ring 2264 and is fixed on the rod 2261 in a limiting manner.

[0044] The top post 2262 protrudes into the valve cap 223. Since a first elastic member 224 with a large diameter is provided between the valve cap 223 and the second housing 212, the top post 2262 can be evenly stressed, thus preventing sealing failure.

[0045] Furthermore, a second elastic member 227 is disposed between the side of the neck portion 2253 facing away from the tail portion 2254 and the top post 2262. Preferably, the second elastic member 227 is a small-diameter spring, and the neck portion 2253 of the valve plug 225 and a portion of the second elastic member 227 are disposed within the first elastic member 224. In this manner, the first elastic member 224 and the second elastic member 227 can jointly control the connection and sealing of the airflow channel.

[0046] A beveled engaging surface 2255 is provided on the side of the tail portion 2254 facing the seal 2263. The beveled engaging surface 2255 seals against the seal 2263 to block the airflow path at the second end 222. The beveled engaging surface 2255 ensures that when the seal 2263 moves from the first end 221 to the second end 222, a gap is created between the seal 2263 and the beveled engaging surface 2255, thereby enabling air flow. Preferably, the seal 2263 is a sealing ring that is fixedly positioned on the tail portion 2254 of the valve plug 225.

[0047] Furthermore, the neck portion 2253 includes a central hole 2257, through which the rod portion 2261 passes. The diameter of the central hole 2257 is larger than the diameter of the rod portion 2261 and smaller than the diameter of the top post 2262. By setting the diameter of the central hole 2257 larger than the diameter of the rod portion 2261, the movement of the rod portion 2261 is facilitated, and airflow can enter the valve plug 225 through the gap between the central hole 2257 and the rod portion 2261. By setting the diameter of the central hole 2257 smaller than the diameter of the top post 2262, the displacement distance of the top post 2262 is limited, preventing the top post 2262 from falling off the neck portion 2253 of the valve plug 225.

[0048] Furthermore, the length of the valve plug 225 is shorter than that of the second housing 212, and a clearance space 2258 2258 is defined between the tail portion 2254 and the inner wall of the second housing 212. This allows the valve post assembly 226 to move toward the second end 222. Preferably, the vertical height of the clearance space 2258 is greater than the height of the seal 2263 and the retaining ring 2264, facilitating gas flow from the gap between the seal 2263 and the second housing 212 into the leak detection cap 1.

[0049] By providing the first elastic member 224 and the second elastic member 227, the valve cap 223 blocks the first channel 2111 under the elastic force of the first elastic member 224, and the sealing member 2263 blocks the second channel 2125 under the elastic force of the second elastic member 227. Consequently, the elastic valve assembly 22, under its own elastic force, seals the airflow channel at both the first end 221 and the second end 222. When the pressure provided by the pressure supply device exceeds the elastic force of the elastic valve assembly 22, the first end 221 drives the second end 222 to move away from the first end 221, thereby opening the airflow channel.

[0050] See also Figure 6 and combined Figure 2-4 As shown, the connector 3 is sealed and sleeved outside the first housing 211. A second guide groove 31 is provided on the connector 3 at a position corresponding to the fixing pin 213. This second guide groove 31 is configured to engage with the fixing pin 213. Preferably, the second guide groove 31 is similar in shape to the first guide groove 121 and may be an arcuate groove, a spiral groove, or an L-shaped groove. The fixing pin 213 passes through the second guide groove 31 and rotates to the bottom, achieving a detachable connection between the adapter assembly 2 and the connector 3.

[0051] A fifth groove 32 is formed on the side of the connector 3 facing the second housing 212. A fifth sealing ring 33 is disposed within this groove, sealing the connection between the adapter assembly 2 and the connector 3. By configuring the adapter assembly 2 and the connector 3 for a left-right connection, the problem of the prior art where pressing the connection vertically would cause the fifth sealing ring 33 to rupture and fail is resolved.

[0052] Furthermore, a protrusion 34 with a through-hole 35 is provided on the side of the connector 3 facing the valve bonnet 223. The protrusion 34 abuts against the valve bonnet 223. When leak detection is required, airflow provided by the pressure supply device can flow out of the through-hole 35 of the protrusion 34 to push the valve bonnet 223. When leak detection is not required, the valve bonnet 223 can block the through-hole 35 of the protrusion 34, thereby sealing the airflow channel.

[0053] The outer side of the connecting piece 3 is also detachably connected to a trachea connector 36 , which is connected to an external pressure supply device via the trachea connector 36 .

[0054] See also Figure 1-6As shown, the working principle of the air tightness detection device 100 for an endoscope of the present invention is as follows: the pressure supply device is connected to the tracheal connector 36. When the pressure of the pressure supply device system is greater than the elastic force of the first elastic member 224 in the air tightness detection device 100, the valve cap 223 is displaced from the first end 221 to the second end 222, thereby generating a gap between the valve cap 223 and the constricted portion 2112 of the first housing 211. Gas enters the first channel 2111 of the first housing 211 through the gap between the valve cap 223 and the constricted portion 2112 via the connector 3, and then enters the valve plug 225 through the air inlet 2256 between the neck portion 2253 and the tail portion 2254 and the gap between the center hole 2257 and the stem portion 2261, thereby establishing communication between the first channel 2111 and the interior of the valve plug 225. At the same time, the valve cap 223 displaces toward the first end 221 and encounters the top post 2262. When the pressure of the pressure supply device exceeds the elastic force of the first elastic member 224 and the second elastic member, the top post 2262 is pushed by the valve cap 223, and is driven by the valve cap 223 to displace from the first end 221 to the second end 222 (i.e., displace along the axial direction). At this time, the seal 2263 is pushed to displace toward the second end 222, and gas flows out through the gap between the seal 2263 and the second shell 212 into the leak detection cap body 1, thereby connecting the internal space of the air flow channel at the second end 222 closed by the seal 2263. The gas then enters the inner cavity of the leak detection cap body 1 through the second channel 2125 and then enters the electronic endoscope. The airtightness of the electronic endoscope is determined by observing whether the pointer indication of the pressure supply device changes. When the pressure supply is stopped or the air pipe connector 36 is removed, the air tightness testing device 100, under the elastic force of the first elastic member 224 and the second elastic member 227 of the elastic valve assembly 22, respectively blocks the first end 221 and the second end 222 of the air flow channel through the valve cap 223 and the sealing member 2263, thereby placing the air tightness testing device 100 in a bidirectionally sealed and self-locking state, thereby increasing the service life of the internal components of the air tightness testing device 100. Furthermore, the present invention relies on the elastic force of the elastic valve assembly 22 itself to achieve automatic control of the air flow channel in the air tightness testing device 100, eliminating the need for manual control of its sealing and connection states, which is simple and convenient.

[0055] In summary, the airtightness detection device 100 for an endoscope of the present invention has a simple processing technology and is detachably connected to the endoscope via the leak detection cap 1, thereby facilitating installation and removal. An elastic valve assembly 22 is provided within the airflow channel of the housing 21 of the adapter assembly 2, and the elastic valve assembly 22, under the action of its own elastic force, seals and closes the airflow channel at both the first end 221 and the second end 222. When the endoscope is not being leak-tested, the elastic valve assembly 22 can be used as a sealing plug, achieving a two-way self-locking seal and extending the service life of the internal parts of the airtightness detection device 100. When leak-testing the endoscope, the pressure provided by the pressure supply device drives the elastic valve assembly 22 to automatically move from the first end 221 to the second end 222 to open the airflow channel. Furthermore, the elastic force directions of the first elastic member 224 and the second elastic member 227 in the elastic valve assembly 22 are stable, resulting in strong overall sealing performance and high leak detection efficiency.

[0056] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. An airtightness detection device for an endoscope, characterized in that: include: a leak detection cap body, which is sealed and connected to the endoscope and communicates with the air path; An adapter assembly, sealed and connected to the leak detection cap; The connecting piece and the sealing sleeve are arranged on the outside of the adapter assembly, are sealed and connected to the pressure supply device and communicate with the gas path; The adapter assembly includes a housing and an elastic valve assembly, wherein the housing has an air flow channel connecting the leak detection cap and the connector, and the elastic valve assembly is built into the air flow channel and includes a first end close to the connector and a second end close to the leak detection cap; Under the action of its own elastic force, the first end and the second end of the elastic valve assembly seal and close the airflow channel. When the pressure provided by the pressure supply device is greater than the elastic force of the elastic valve assembly, the first end drives the second end to move away from the first end, thereby opening the airflow channel. The housing includes a first housing fixedly connected to the connector and a second housing fixedly connected to the leak detection cap, and the air flow channel includes a first channel provided in the first housing and in air flow communication with the connector, and a second channel provided in the second housing and in air flow communication with the leak detection cap; The elastic valve assembly includes a valve cap and a first elastic member disposed between the valve cap and the second housing. The valve cap is positionally connected to the first housing and seals the first channel under the elastic force of the first elastic member. The elastic valve assembly also includes a valve plug and a valve column assembly. The valve plug is built into the second shell and is sealed with the second shell, including a neck arranged close to the valve cap and a tail arranged away from the valve cap. The valve column assembly includes a rod passing through the valve plug and a top column and a sealing member arranged at both ends of the rod. The top column protrudes into the valve cap and a second elastic member is provided between the top column and the side of the neck facing away from the tail. The side of the tail facing the sealing member is provided with a snap-fitting bevel, and the snap-fitting bevel is sealingly abutted against the sealing member to seal the second channel.

2. The airtightness detection device for an endoscope according to claim 1, characterized in that: The second shell is at least partially built into the first shell and is sealed to the first shell.

3. The airtightness detection device for an endoscope according to claim 1, characterized in that: A protrusion with a through hole is provided on a side of the connecting member facing the valve cap, and the protrusion abuts against the valve cap.

4. The airtightness detection device for an endoscope according to claim 1, characterized in that: The first shell includes a first groove close to the valve bonnet and a second groove away from the valve bonnet. A first sealing ring is provided in the first groove, and the first sealing ring is configured to seal the first shell and the valve bonnet. A second sealing ring is provided in the second groove, and the second sealing ring is configured to seal the first shell and the second shell.

5. The airtightness detection device for an endoscope according to claim 1, characterized in that: The neck portion includes a central hole, the rod portion passes through the central hole, and a diameter of the central hole is larger than a diameter of the rod portion and smaller than a diameter of the top column.

6. The airtightness detection device for an endoscope according to claim 1, characterized in that: The length of the valve plug is smaller than that of the second housing, and a clearance space is provided between the tail portion and the inner wall of the second housing. In the vertical direction, the height of the clearance space is greater than the height of the sealing component.

7. The airtightness detection device for an endoscope according to claim 1, characterized in that: A third sealing ring is provided between the second housing and the valve plug, and a fourth sealing ring is provided between the second housing and the leak detection cap body.

8. The airtightness detection device for an endoscope according to claim 1, characterized in that: The leak detection cap body is detachably connected to the endoscope, and the adapter assembly is detachably connected to the leak detection cap body and the connector respectively.

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