Endoscope light guide plug with air tightness self-checking function

Abstract

The invention relates to the technical field of medical instruments, and discloses an endoscope light guide plug with an air tightness self-checking function, which comprises a plug shell, a sealing ring is fixedly connected to the inner wall of the plug shell, a light guide unit is fixedly connected to the inner wall of the plug shell, an air inlet pipe I penetrates through the outer wall of the plug shell, and an air inlet pipe II penetrates through the outer wall of the plug shell. And an air inlet pipe II penetrates through the inner wall of the plug shell. When the filter plate is replaced through the dismounting mechanism, a knob is rotated to drive a locking rod and a limiting rod to rotate, so that the limiting rod is aligned with a communicating groove, a spring I pulls a guide sheet to move along a sliding groove, and the locking rod is separated from a locking groove, so that the plate can be taken; during installation, the filter plate is placed, the knob is pulled to enable the locking rod to be aligned with the locking groove, the locking rod is clamped after loosening, the knob is rotated to enable the limiting rod and the communicating groove to be staggered and fixed, the filter plate is rapidly disassembled and assembled, cleaning or replacement is convenient, the filter plate is prevented from being blocked to affect a gas path, the gas filtering effect is guaranteed, the maintenance time and cost are reduced, and the long-term use stability of equipment is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical instrument equipment, in particular to an endoscope light guide plug with air tightness self-checking function. BACKGROUND

[0002] The endoscope light guide plug is a key connecting component of the endoscope optical system, which is used to realize stable docking of the light source and the endoscope main body, and to ensure efficient transmission of light to meet the clear imaging requirement in clinical diagnosis and treatment. The structural stability and performance reliability of the endoscope light guide plug directly affect the diagnosis and treatment accuracy. In order to protect the internal components of the light guide plug from damage caused by external water vapor and dust intrusion during use, air tightness detection is required. The air tightness detection is usually completed by injecting detection gas into the plug through the air inlet pipe. In order to prevent impurities mixed in the detection gas from entering the plug, a filter plate needs to be installed at the gas inlet of the air inlet pipe to filter the impurities and ensure the detection accuracy and the cleanliness of the plug.

[0003] Since the filter plate is prone to reduce the filtering efficiency due to impurity accumulation after long-term use, it needs to be disassembled for cleaning or replacement regularly to maintain the air tightness detection effect. However, the filter plate of the air inlet pipe of the existing endoscope light guide plug is usually difficult to disassemble conveniently. This problem leads to complicated cleaning or replacement operation of the filter plate, which not only increases the operation difficulty and time cost of the staff, but also may cause damage to the air inlet pipe or the filter plate during forced disassembly, affecting the overall air tightness and service life of the light guide plug, and further increasing the maintenance cost and diagnosis and treatment risk of the endoscope. SUMMARY

[0004] The present application aims to provide an endoscope light guide plug with air tightness self-checking function to solve the problems raised in the background.

[0005] To solve the above technical problems, the present application is realized by the following technical scheme:

[0006] The utility model is an endoscope light guide plug with air tightness self-checking function, including plug shell, the inner wall of plug shell is fixedly connected with sealing ring, the inner wall of plug shell is fixedly connected with light guide unit, the outer wall of plug shell is penetrated with air pipe no.

[0007] Further, the air tightness mechanism one further comprises a supporting assembly, the supporting assembly is arranged in the inside of the extension pipe, and the supporting assembly is used for supporting the sealing block; a guiding assembly, the guiding assembly is arranged in the inside of the extension pipe, and the guiding assembly is used for guiding and limiting the sealing block.

[0008] Further, the air tightness mechanism two comprises a detection assembly, the detection assembly is arranged in the inside of the plug shell, and the detection assembly is used for detecting the air tightness of the light guide plug; an alarm assembly, the alarm assembly is arranged on the plug shell, and the alarm assembly is used for displaying and alarming the result of the air tightness detection of the light guide plug.

[0009] Further, the inner wall of two sliding grooves is slidably connected with a guiding piece, the outer wall of the filter plate is provided with two locking grooves, the inner wall of two sliding grooves is slidably connected with a locking rod, the end of two locking rods close to each other is extended to the inner wall of the corresponding locking groove and is slidably connected with the corresponding locking groove, two locking rods penetrate through the corresponding guiding piece and are rotatably connected with the corresponding guiding piece, two guiding pieces are matched with the inner wall of the corresponding sliding groove, and two locking rods are guided and limited by two guiding pieces respectively.

[0010] Further, the outer wall of the two locking rods is sleeved with a spring, and the end of the two locking rods away from each other is fixedly connected with a knob.

[0011] Further, the inside of the air inlet pipe one is provided with two limiting grooves, the outer wall of the plug shell is provided with two communication grooves, the two locking rods are penetrated through limiting rods, the two limiting rods are fixedly connected with the corresponding locking rods, the two limiting rods are fixedly connected with the corresponding locking rods through welding, and the two limiting rods are matched with the corresponding communication grooves and limiting grooves.

[0012] Further, the support assembly comprises a support plate fixedly connected to the sealing block away from the air inlet pipe one end, the end of the support plate away from the sealing block is fixedly connected with a spring two, the inner wall of the extension pipe is fixedly connected with a porous plate, the porous plate is fixedly connected with the inner wall of the extension pipe through welding, and a plurality of through holes are formed in the porous plate, which can provide support for the spring two and will not affect the flow of air.

[0013] Further, the guide assembly comprises a plurality of guide grooves formed in the inner wall of the extension pipe, and the outer wall of the support plate is fixedly connected with a plurality of guide blocks.

[0014] Further, the detection assembly comprises a circuit board fixedly connected to the inner wall of the plug shell, a control chip mounted on the side of the circuit board away from the inner wall of the plug shell, and a storage mounted on the side of the circuit board away from the inner wall of the plug shell.

[0015] Further, the warning assembly comprises a warning lamp mounted on the outer side of the plug shell, and a display screen mounted on the outer side of the plug shell and connected with the circuit board of the detection assembly through an SPI interface, so that the air tightness detection data can be displayed in real time.

[0016] The application has the following advantages:

[0017] (1) The present application is provided with a dismounting mechanism, specifically, when replacing the filter plate, rotating the knob drives the locking rod and the limiting rod to rotate, aligning the limiting rod with the communication groove, pulling the spring one to move the guide piece along the sliding groove, and the locking rod is separated from the locking groove to take out the plate; when installing, put in the filter plate, pull the knob to align the locking rod with the locking groove, and then release the locking rod to be clamped in, rotate the knob to fix the limiting rod and the communication groove out of position, realize the quick dismounting and mounting of the filter plate, facilitate cleaning or replacement, avoid the influence of filter plate blockage on the gas circuit, ensure the gas filtering effect, reduce the maintenance time and cost, and improve the long-term use stability of the equipment.

[0018] (2) The present application is provided with a gas-tight mechanism one, specifically, when manually detecting, the external air gun nozzle is inserted into the air inlet pipe one, the sealing block is moved to the extension pipe against the spring two elastic force, and the guide block is guided along the guide groove; the gas is filtered by the filter plate, the sealing block and the extension pipe channel, enters the sealed cavity through the through hole of the porous plate, and is manually pressurized for detection; after the end, the sealing block is reset under the action of the spring two, and is suitable for the scene without automatic detection conditions, the guide and sealing structure ensures stable gas transmission and no leakage during detection, guarantees the accuracy of manual detection result, and improves the applicability and operation flexibility of the equipment.

[0019] (3) The present application is provided with a gas-tight mechanism two, specifically, when automatically detecting, the control chip on the circuit board triggers the micro air pump to start, the gas is filtered by the filter plate in the air inlet pipe two and then enters the air pump, is compressed and then delivered to the plug shell sealed cavity through the air outlet pipe; the pressure sensor transmits the gas pressure analog signal to the control chip, converts it into a digital signal through the built-in ADC module, judges the gas tightness combined with the algorithm, and stores the detection data in the storage; when qualified, the green warning light is always on and the display screen displays the data, and when leaking, the red light is on and records the fault, without relying on external equipment, realizing automatic and accurate detection, real-time feedback of results and storage of data, improving the detection efficiency and reliability, avoiding human error, and ensuring the safety of endoscope use.

[0020] Of course, any product implementing the present application does not necessarily need to achieve all the advantages described above. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creating laborious work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0023] Figure 2 It is a schematic diagram of the rear view structure of the present application;

[0024] Figure 3 This is a schematic diagram of the rear cross-sectional structure of the present invention;

[0025] Figure 4 This is a schematic cross-sectional view of the plug housing of the present invention;

[0026] Figure 5 This is a schematic cross-sectional view of the second air intake pipe of the present invention;

[0027] Figure 6 This is a schematic cross-sectional view of the extension tube of the present invention;

[0028] Figure 7 This is a schematic cross-sectional view of the intake pipe of the present invention;

[0029] Figure 8 For the present invention Figure 2 A magnified structural diagram of A in the middle;

[0030] Figure 9 For the present invention Figure 3 A magnified structural diagram of B in the diagram;

[0031] Figure 10 For the present invention Figure 4 A magnified structural diagram of C.

[0032] The attached diagram lists the components represented by each number as follows:

[0033] In the diagram: 1. Plug housing; 11. Sealing ring; 12. Light guide unit; 13. Inlet pipe one; 14. Inlet pipe two; 15. Filter plate; 2. Disassembly mechanism; 21. Slide groove; 211. Locking groove; 212. Locking rod; 213. Spring one; 214. Knob; 22. Guide plate; 23. Limiting groove; 231. Connecting groove; 232. Limiting rod; 3. Airtight mechanism one; 31. Extension tube; 311. Sealing block; 3 2. Support assembly; 321. Support plate; 322. Spring II; 323. Perforated plate; 33. Guide assembly; 331. Guide groove; 332. Guide block; 4. Airtight mechanism II; 41. Miniature air pump; 411. Air outlet pipe; 42. Detection assembly; 421. Circuit board; 422. Control chip; 423. Storage device; 424. Pressure sensor; 43. Warning assembly; 431. Warning light; 432. Display screen. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please refer to Figures 1-10 As shown in the, the present application is a kind of endoscope light guide plug with air-tight self-checking function, including plug shell 1, the inner wall of plug shell 1 is fixedly connected with sealing ring 11, the inner wall of plug shell 1 is fixedly connected with light guide unit 12, the outer wall of plug shell 1 is penetrated by air pipe one 13, the inner wall of plug shell 1 is penetrated by air pipe two 14, air pipe one 13 and air pipe two 14 are fixedly connected with plug shell 1, the inner wall of air pipe one 13 and air pipe two 14 is equipped with filter plate 15, further comprising: dismounting mechanism 2, two groups of dismounting mechanism 2 are arranged, two groups of dismounting mechanism 2 are arranged on air pipe one 13 and air pipe two 14 respectively, dismounting mechanism 2 is used to dismount filter plate 15, and dismounting mechanism 2 includes two sliding grooves 21 in air pipe one 13;Air-tight mechanism one 3, air-tight mechanism one 3 is arranged on air pipe one 13, air-tight mechanism one 3 is used for manually detecting the air-tightness of light guide plug, and air-tight mechanism one 3 includes extension pipe 31 fixedly connected to the end of air pipe one 13 inside plug shell 1, and sealing block 311 is slidably connected to the inner wall of air pipe one 13;Air-tight mechanism two 4, air-tight mechanism two 4 is arranged on plug shell 1, and air-tight mechanism two 4 is used for automatically detecting the air-tightness of light guide plug, and air-tight mechanism two 4 includes micro air pump 41 fixedly connected to the inner wall of plug shell 1, and the output end of micro air pump 41 is fixedly connected with air outlet pipe 411;Wherein, the end of air pipe two 14 inside plug shell 1 is fixedly connected with the input end of micro air pump 41;Air-tight mechanism one 3 further includes support assembly 32, support assembly 32 is arranged in the inside of extension pipe 31, and support assembly 32 is used for supporting sealing block 311;Guide assembly 33, guide assembly 33 is arranged in the inside of extension pipe 31, and guide assembly 33 is used for guiding and limiting sealing block 311;Air-tight mechanism two 4 includes detection assembly 42, detection assembly 42 is arranged in the inside of plug shell 1, and detection assembly 42 is used for detecting the air-tightness of light guide plug;Warning assembly 43, warning assembly 43 is arranged on plug shell 1, and warning assembly 43 is used for displaying and warning the result of air-tightness detection of light guide plug.

[0036] The inner walls of the two sliding grooves 21 are slidably connected with guide pieces 22, the outer wall of the filter plate 15 is provided with two locking grooves 211, the inner walls of the two sliding grooves 21 are slidably connected with locking rods 212, the ends of the two locking rods 212 close to each other extend to the inner walls of the corresponding locking grooves 211 and are slidably connected with the corresponding locking grooves 211, the two locking rods 212 penetrate through the corresponding guide pieces 22 and are rotatably connected with the corresponding guide pieces 22, the ends of the two locking rods 212 away from each other are respectively inserted into the interiors of the corresponding locking grooves 211, so that the position of the filter plate 15 is locked and fixed, and at the same time, the ends of the two locking rods 212 close to each other are respectively matched with the corresponding locking grooves 211; the outer walls of the two locking rods 212 are sleeved with springs 213, and the ends of the two locking rods 212 away from each other are fixedly connected with knobs 214; the interior of the air inlet pipe 1 is provided with two limiting grooves 23, the outer wall of the plug shell 1 is provided with two communication grooves 231, the two locking rods 212 are penetrated through limiting rods 232, and the two limiting rods 232 are respectively fixedly connected with the corresponding locking rods 212; when the locking rod 212 is clamped into the locking groove 211, the spring is stretched at this time, and at the same time, the limiting rod 232 enters the interior of the limiting groove 23 through the communication groove 231; because the locking rod 212 is rotatably connected with the guide piece 22, rotating the locking rod 212 can make the limiting rod 232 and the communication groove 231 misaligned to fix and install the filter plate 15; by setting the dismounting mechanism 2, when the filter plate 15 is replaced, rotating the knob 214 drives the locking rod 212 and the limiting rod 232 to rotate, so that the limiting rod 232 is aligned with the communication groove 231, the spring 213 drives the guide piece 22 to move along the sliding groove 21, the locking rod 212 is separated from the locking groove 211, and the plate can be taken out; when installing, the filter plate 15 is put in, the locking rod 212 is aligned with the locking groove 211 by pulling the knob 214, the locking rod 212 is clamped in after being loosened, the limiting rod 232 is misaligned with the communication groove 231 by rotating the knob 214, the filter plate 15 is quickly disassembled, cleaned or replaced, the air passage is not affected by the filter plate blockage, the gas filtering effect is guaranteed, the maintenance time and cost are reduced, and the long-term use stability of the equipment is improved.

[0037] The support assembly 32 comprises a support plate 321 fixedly connected to the sealing block 311 away from the one end of the air inlet pipe 13, the one end of the support plate 321 away from the sealing block 311 is fixedly connected with a spring 322, the inner wall of the extension pipe 31 is fixedly connected with a porous plate 323, the one end of the spring 322 away from the support plate 321 is fixedly connected with the porous plate 323, and both ends are fixedly connected with the support plate 321 and the porous plate 323 respectively by welding; the guide assembly 33 comprises a plurality of guide grooves 331 opened in the inner wall of the extension pipe 31, the outer wall of the support plate 321 is fixedly connected with a plurality of guide blocks 332, the side of the plurality of guide blocks 332 away from the support plate 321 extends into the corresponding guide groove 331 and is slidably connected with the corresponding guide groove 331, by setting the air-tight mechanism 1, specifically when manually detecting, the external air gun nozzle is inserted into the air inlet pipe 13, the sealing block 311 is pushed to move to the extension pipe 31 against the elastic force of the spring 322, the guide block 332 is guided along the guide groove 331; the gas is filtered through the filter plate 15, the sealing block 311 and the channel of the extension pipe 31, enters the sealed cavity through the through hole of the porous plate 323, and is manually pressurized and detected; after the end, the sealing block 311 is reset and sealed under the action of the spring 322, the automatic detection condition scene is adapted, the guide and sealing structure ensures stable transmission of the gas during detection and no leakage, guarantees the accuracy of the manual detection result, and improves the applicability and operation flexibility of the equipment.

[0038] The detection assembly 42 comprises a circuit board 421 fixedly connected to the inner wall of the plug shell 1, a control chip 422 mounted on the side of the circuit board 421 away from the inner wall of the plug shell 1, a storage 423 mounted on the side of the circuit board 421 away from the inner wall of the plug shell 1, and a pressure sensor 424 mounted in the plug shell 1. The storage 423 is an I2C interface EEPROM chip of model AT24C02, also welded on the circuit board 421 by surface mounting technology, and connected with the control chip 422 through an I2C bus. The pressure sensor 424 is of model MPX5700, electrically connected with the corresponding interface on the circuit board 421, and transmits the collected air pressure analog signal to the control chip 422 on the circuit board 421. The warning assembly 43 comprises a warning light 431 mounted on the outer side of the plug shell 1 and a display screen 432 mounted on the outer side of the plug shell 1. By setting the air-tight mechanism two 4, specifically, when automatic detection, the control chip 422 on the circuit board 421 triggers the micro air pump 41 to start, the gas enters the air pump after being filtered by the filter plate 15 in the air inlet pipe two 14, and is compressed and delivered to the sealed chamber of the plug shell 1 through the air outlet pipe 411. The pressure sensor 424 transmits the air pressure analog signal to the control chip 422, which is converted into a digital signal through a built-in ADC module, and the air tightness is judged by combining the algorithm, and the detection data is stored in the storage 423. When qualified, the green warning light 431 is always on and the display screen 432 displays data, and when leaking, the red light is on and records the fault. Without relying on external equipment, automatic and accurate detection is realized, the result is fed back in real time and the data is stored, the detection efficiency and reliability are improved, human error is avoided, and the safety of the endoscope is ensured.

[0039] When it is necessary to automatically detect the air tightness of the light guide plug, the control chip 422 of model STM32G0 on the circuit board 421 triggers the micro air pump 41 to start. The micro air pump 41 draws gas from the outside through the air inlet pipe two 14. The gas first passes through the filter plate 15 on the inner wall of the air inlet pipe two 14 to filter out impurities, and then enters the inside of the micro air pump 41. After compression, it is delivered to the sealed chamber inside the plug shell 1 through the air outlet pipe 411 at the output end, so that the pressure in the chamber gradually rises to a preset detection value. In this process, the detection assembly 42 monitors the pressure change in the chamber in real time. The pressure sensor 424 transmits the collected air pressure analog signal to the control chip 422 on the circuit board 421. The control chip 422 converts the analog signal into a digital signal through the built-in ADC module, and then analyzes and judges the air tightness state by combining the preset algorithm. Then the control chip 422 processes the signal transmitted by the pressure sensor 424 through the built-in algorithm, and stores the detection data into the storage 423 of the disassembly mechanism 2. If the pressure drop in the chamber does not exceed the preset threshold within the set time, the control chip 422 determines that the air tightness is good. At this time, the green warning light 431 in the warning assembly 43 is always on, and the display screen 432 displays "qualified" and the specific pressure data. If the pressure drop exceeds the threshold, it is determined that there is a leak. The red warning light 431 is always on, and the display screen 432 displays "leakage" and the pressure change curve. At the same time, the storage 423 records the fault information for subsequent tracing.

[0040] When manual detection is performed, the external air gun nozzle is inserted into the air inlet pipe one 13. The nozzle pushes the sealing block 311 to move into the extension pipe 31 against the elastic force of the spring two 322 in the support assembly 32. In this process, the guide block 332 of the guide assembly 33 slides along the guide groove 331 to ensure smooth movement of the sealing block 311. At this time, the air inlet pipe one 13 is in communication with the extension pipe 31. The gas is filtered by the filter plate 15 in the air inlet pipe one 13, passes through the channel between the sealing block 311 and the extension pipe 31, and then enters the sealed chamber inside the plug shell 1 through the through holes on the porous plate 323. After manually applying pressure to reach the detection pressure in the chamber, stop inflating and observe the pressure change of the external detection equipment. At the same time, the internal detection assembly 42 also synchronously monitors and feeds back the state through the warning assembly 43. After the detection is completed, remove the air gun nozzle. The sealing block 311 is reset under the action of the elastic force of the spring two 322, reseals the air inlet pipe one 13, and prevents the chamber gas from leaking.

[0041] When the filter plate 15 needs to be replaced or cleaned, the two knobs 214 are rotated to drive the locking rod 212 and the limiting rod 232 to rotate, so that the limiting rod 232 is aligned with the communication groove 231, at this time the elastic force of the spring 213 pulls the guide piece 22 to move along the sliding groove 21 in the direction away from the filter plate 15, and the locking rod 212 is withdrawn from the locking groove 211, so that the filter plate 15 can be taken out; when installing, the new filter plate 15 is placed in the corresponding position of the air inlet pipe 1 3 or the air inlet pipe 2 14, the knob 214 is pulled outward to stretch the spring 213, and the knob 214 is rotated to align the locking rod 212 with the locking groove 211, after the knob 214 is released, the locking rod 212 is clamped into the locking groove 211 under the action of the spring 213, and the knob 214 is rotated again to misalign the limiting rod 232 with the communication groove 231, and the limiting groove 23 is used to limit the limiting rod 232, so that the installation of the filter plate 15 is completed, and it is ensured that the filter plate 15 will not be loose or displaced when the gas flows.

[0042] The preferred embodiments disclosed above are only used to help explain the present application. The preferred embodiments do not describe all the details and limit the present application to the specific embodiments. Obviously, according to the content of the present application, many modifications and changes can be made. The present application is selected and described in detail, in order to better explain the principles and practical application of the present application, so that those skilled in the art can well understand and use the present application. The present application is limited by the claims and the entire scope and equivalents thereof.

Claims

1. An endoscope light guide plug with airtightness self-test function, comprising a plug housing (1), wherein a sealing ring (11) is fixedly connected to the inner wall of the plug housing (1), a light guide unit (12) is fixedly connected to the inner wall of the plug housing (1), an air inlet pipe (13) penetrates the outer wall of the plug housing (1), and an air inlet pipe (14) penetrates the inner wall of the plug housing (1), wherein both the air inlet pipe (13) and the air inlet pipe (14) are fixedly connected to the plug housing (1), and filter plates (15) are installed on the inner walls of both the air inlet pipe (13) and the air inlet pipe (14), characterized in that, Also includes: The disassembly mechanism (2) is provided in two sets, which are respectively installed on the first air inlet pipe (13) and the second air inlet pipe (14). The disassembly mechanism (2) is used to disassemble and install the filter plate (15). The disassembly mechanism (2) includes two sliding grooves (21) opened on the first air inlet pipe (13); and Airtight mechanism 1 (3) is provided on air inlet pipe 1 (13). Airtight mechanism 1 (3) is used to manually test the airtightness of the light guide plug. Airtight mechanism 1 (3) includes an extension pipe (31) fixedly connected to one end of the air inlet pipe 1 (13) located inside the plug housing (1). A sealing block (311) is slidably connected to the inner wall of the air inlet pipe 1 (13). Airtight mechanism two (4) is set on the plug housing (1). The airtight mechanism two (4) is used to automatically detect the airtightness of the light guide plug. The airtight mechanism two (4) includes a miniature air pump (41) fixedly connected to the inner wall of the plug housing (1). The output end of the miniature air pump (41) is fixedly connected to an air outlet pipe (411). Among them, the second air inlet pipe (14) is located inside the plug housing (1) and is fixedly connected to the input end of the micro air pump (41).

2. The endoscope light guide plug with airtightness self-test function according to claim 1, characterized in that, The airtight mechanism (3) further includes a support assembly (32) disposed inside the extension tube (31), the support assembly (32) being used to support the sealing block (311); and A guide assembly (33) is disposed inside the extension tube (31) and is used to guide and limit the sealing block (311).

3. An endoscope light guide plug with airtightness self-test function according to claim 2, characterized in that: The second airtight mechanism (4) includes a detection component (42), which is disposed inside the plug housing (1) and is used to monitor the airtightness of the light guide plug. as well as Warning component (43) is disposed on plug housing (1) and is used to display and warn of the results of the airtightness test of the light guide plug.

4. An endoscope light guide plug with airtightness self-test function according to claim 1, characterized in that: The inner walls of the two slide grooves (21) are slidably connected with guide plates (22), and the outer wall of the filter plate (15) is provided with two locking grooves (211). The inner walls of the two slide grooves (21) are slidably connected with locking rods (212). The two locking rods (212) extend to the inner wall of the corresponding locking groove (211) and are slidably connected to the corresponding locking groove (211). The two locking rods (212) pass through the corresponding guide plates (22) and are rotatably connected to the corresponding guide plates (22). Both locking rods (212) are fixedly connected to the corresponding guide plate (22) by welding, and the ends of the two locking rods (212) that are far apart from each other extend to the outside of the intake pipe (13).

5. An endoscope light guide plug with airtightness self-test function according to claim 4, characterized in that: Spring 1 (213) is sleeved on the outer wall of each of the two locking rods (212), and knob (214) is fixedly connected to the ends of the two locking rods (212) that are far apart from each other; One end of each of the two springs (213) is fixedly connected to the corresponding guide plate (22), and the other end is fixedly connected to the inner wall of each of the two grooves (21) away from the guide plate (22).

6. An endoscope light guide plug with airtightness self-test function according to claim 4, characterized in that: The air intake pipe (13) has two limiting grooves (23) inside, and the plug housing (1) has two connecting grooves (231) on its outer wall. Each of the two locking rods (212) has a limiting rod (232) through it, and the two limiting rods (232) are fixedly connected to the corresponding locking rods (212). Among them, the two limiting grooves (23) are located on the side of the two sliding grooves (21) that are far away from each other, and the two connecting grooves (231) are located on the side of the two limiting grooves (23) that are far away from the corresponding sliding grooves (21). At the same time, the two limiting grooves (23) are connected to the corresponding sliding grooves (21) and the connecting grooves (231) respectively.

7. An endoscope light guide plug with airtightness self-test function according to claim 2, characterized in that: The support assembly (32) includes a support plate (321) fixedly connected to the end of the sealing block (311) away from the air intake pipe (13), and a spring (322) fixedly connected to the end of the support plate (321) away from the sealing block (311), and a perforated plate (323) fixedly connected to the inner wall of the extension pipe (31). The support plate (321) and the sealing block (311) are fixedly connected by welding. The diameter of the support plate (321) is larger than the inner wall diameter of the air intake pipe (13) and smaller than the inner wall diameter of the extension pipe (31). The diameter of the sealing block (311) is the same as the inner wall diameter of the air intake pipe (13).

8. An endoscope light guide plug with airtightness self-test function according to claim 7, characterized in that: The guide assembly (33) includes a plurality of guide grooves (331) formed on the inner wall of the extension tube (31), and a plurality of guide blocks (332) are fixedly connected to the outer wall of the support plate (321). The side of each of the guide blocks (332) away from the support plate (321) extends into the corresponding guide groove (331) and is slidably connected to the corresponding guide groove (331).

9. An endoscope light guide plug with airtightness self-test function according to claim 3, characterized in that: The detection component (42) includes a circuit board (421) fixedly connected to the inner wall of the plug housing (1). A control chip (422) is installed on the side of the circuit board (421) away from the inner wall of the plug housing (1). A storage device (423) is installed on the side of the circuit board (421) away from the inner wall of the plug housing (1). A pressure sensor (424) is installed inside the plug housing (1). The circuit board (421) is treated with immersion gold, which has good oxidation resistance and conductivity. The analog signal circuit and digital signal circuit are arranged in separate sections.

10. An endoscope light guide plug with airtightness self-test function according to claim 3, characterized in that: The warning assembly (43) includes a warning light (431) installed on the outside of the plug housing (1), and a display screen (432) is installed on the outside of the plug housing (1); The warning light (431) uses three surface-mount LED beads, one each of red, yellow and green, which are soldered onto a small auxiliary circuit board using surface mount technology. The auxiliary circuit board is electrically connected to the circuit board (421) via tin-plated copper wire. The red light is used to indicate abnormal air tightness, the yellow light is used to indicate equipment failure or low power, and the green light is used to indicate normal self-test. The state switching is achieved by the high and low level signals output by the control chip (422).

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