Endoscope, side leakage valve and endoscope system

Abstract

The utility model relates to the technical field of medical instruments, and provides an endoscope, a side leakage valve and an endoscope system, and the endoscope comprises a connecting part and the side leakage valve. The connecting part comprises a shell; the side leakage valve comprises a valve body and a valve element, the valve body is inserted into the shell and provided with an air guide channel, and the valve element can move in the air guide channel. Wherein the air guide channel comprises a first channel and a second channel, the inner diameter of the second channel is larger than that of the first channel, the valve element comprises a blocking part, and in the normally-closed state, the blocking part is arranged in the first channel and the second channel, and the blocking part is in clearance fit with the first channel; and in the opening state, the blocking part moves into the second channel in the axial direction of the valve body. According to the endoscope, due to the fact that the inner diameter of the second channel is larger than that of the first channel, after the blocking part moves into the second channel, the ventilation gap with the larger cross section area is formed between the peripheral side wall of the blocking part and the inner wall of the second channel, and the requirement for inflow or outflow of gas can be better met.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular provides an endoscope, a side leakage valve, and an endoscope system. Background Technology

[0002] In clinical practice, endoscopes are commonly used to examine patients, obtaining high-resolution images of pathological sites or extracting tissue from these sites for clinical diagnosis through techniques such as optical imaging and ultrasound detection. An endoscope mainly consists of a connecting section, an operating section, and an insertion section. The connecting section is primarily used to connect to external light sources, ultrasound processing units, etc. The operating section is mainly used to control the extension and retraction of instruments, the bending of the insertion section, the control of the lifting device, and the zoom function of the lens imaging. The insertion section is used to insert the endoscope into the human body for examination.

[0003] The side-leak valve is an important component of reusable endoscopes. Located on the connection point, it is normally closed. The side-leak valve is the only component used to check the overall airtightness of the endoscope. After use, the endoscope is cleaned and disinfected, and an airtightness test is required. This is done by connecting the external side-leak connector to the valve and rotating it to connect the endoscope's interior to the external side-leak device. The external device pressurizes the entire endoscope until a specified pressure is reached. Then, the endoscope is placed in water or the pressure of the side-leak device is observed. If no continuous bubbles emerge or the pressure does not drop, the endoscope is airtight. If continuous bubbles emerge or the pressure drops rapidly, the endoscope is not airtight and needs to be returned to the factory for repair.

[0004] However, current side leakage valve products have low ventilation efficiency, making it difficult to inflate or deflate in a short time, which affects the normal use of the endoscope as a whole. Utility Model Content

[0005] The purpose of this invention is to provide an endoscope, a side leakage valve, and an endoscope system, which aims to solve the problem of long time consumption and difficulty in recovery when testing the air tightness of reusable endoscopes.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] In a first aspect, embodiments of this application provide an endoscope, comprising:

[0008] The connecting part includes a housing;

[0009] A side-leaking valve, comprising a valve body and a valve core, wherein the valve body is inserted into the outer casing, the valve body has an air guide channel, and the valve core is movable within the air guide channel along the axial direction of the valve body;

[0010] The air guide channel includes a first channel and a second channel that are sequentially connected along the axial direction of the valve body. The inner diameter of the second channel is larger than the inner diameter of the first channel. The valve core includes a blocking part. In the normally closed state, the blocking part is placed in the first channel and the second channel, and the blocking part is in clearance fit with the first channel. In the open state, the blocking part can move along the axial direction of the valve body into the second channel.

[0011] The beneficial effects of this invention are as follows: Before airtightness testing, the endoscope provided by this invention has its valve core sealing part placed inside the first and second channels to seal the air passages, keeping the side leakage valve in a normally closed state. During airtightness testing, the valve core moves along the axial direction of the valve body within the air passages, while the sealing part separates from the first channel and moves into the second channel. Because the inner diameter of the second channel is larger than that of the first channel, after the sealing part moves into the second channel, a larger cross-sectional area ventilation gap is formed between the peripheral sidewall of the sealing part and the inner wall of the second channel, which better satisfies the inflow or outflow of gas, thereby improving the detection efficiency of the reusable endoscope during airtightness testing.

[0012] In some embodiments, the air guide channel further includes a third channel communicating with the second channel, the inner diameter of the third channel being larger than that of the second channel, the valve core including a main body portion connected to the sealing portion, the main body portion being placed inside the third channel, and the outer diameter of the main body portion being larger than that of the sealing portion;

[0013] The side leakage valve includes a first sealing ring, which is sleeved on the blocking part and placed inside the third channel. In the normally closed state, the first sealing ring abuts against the inner wall of the third channel and blocks the second channel. In the open state, the first sealing ring is separated from the inner wall of the third channel.

[0014] By adopting the above technical solution, when the side leakage valve is in the normally closed state, the first sealing ring abuts against the inner wall of the third channel and blocks the second channel. When the side leakage valve is in the open state, the first sealing ring moves with the blocking part and separates from the inner wall of the third channel, so that the second channel and the third channel are connected.

[0015] In one embodiment, the third channel includes a first sub-segment and a second sub-segment that are connected to each other. The first sub-segment is connected to the second channel, and the inner diameter of the first sub-segment is larger than the inner diameter of the second sub-segment. The main body portion is in clearance fit with the second sub-segment.

[0016] By adopting the above technical solution, the main body and the second sub-section are fitted with a gap to meet the stability of the valve core when it moves relative to the valve body. In addition, the inner wall of the first sub-section and the peripheral side wall of the main body form a ventilation gap with a larger cross-sectional area, which can better meet the needs of gas inflow or outflow.

[0017] In one embodiment, the peripheral sidewall of the main body includes a contact surface that mates with the second sub-segment and at least one milled surface, the milled surface forming a ventilation gap with the inner wall of the second sub-segment.

[0018] By adopting the above technical solution, only the contact surface of the peripheral sidewall of the main body is in clearance fit with the second sub-segment, while the milled surface forms a ventilation gap with the inner wall of the second sub-segment.

[0019] In one embodiment, the number of milled surfaces is three, and each milled surface is alternately connected to the contact surface in sequence. A groove corresponding to the milled surface is formed on the inner wall of the second sub-segment.

[0020] By adopting the above technical solution, the cross-sectional area of ​​the ventilation gap is increased to the maximum extent, and the connection stability of the main body relative to the second sub-section is also guaranteed.

[0021] In one embodiment, the main body is capable of spirally moving upward or downward relative to the valve body, and the circumferential arc length of at least one of the contact surfaces is greater than the width of any of the channels.

[0022] By adopting the above technical solution, when the main body moves up and down or down relative to the valve body, the smoothness of the relative rotation of the main body relative to the second sub-section can only be improved when the circumferential arc length of the contact surface is greater than the width of any channel.

[0023] In one embodiment, a first air passage is provided on the peripheral sidewall of the main body; and / or, a first air passage is provided on the peripheral sidewall of the blocking part, and a second air passage is provided at the end of the main body away from the blocking part, wherein the first air passage and the second air passage are connected.

[0024] By adopting the above technical solution, adding a first air passage to the main body and / or the sealing part, and connecting the first air passage with the second air passage, the air intake of the side leakage valve can be further increased.

[0025] In one embodiment, the second channel includes a third sub-segment and a fourth sub-segment that are connected to each other. The third sub-segment is connected to the first channel. The inner diameter of the third sub-segment gradually increases along the axial direction of the valve body. The valve core includes a sealing element disposed on the sealing portion. In the normally closed state, the sealing element abuts against the inner wall of the third sub-segment. In the open state, the sealing element is separated from the inner wall of the third sub-segment.

[0026] By adopting the above technical solution, the addition of a sealing element can further reduce the probability of water retention in the side leakage valve under normal closed state, thereby reducing the probability of water vapor corroding the internal components of the endoscope.

[0027] In one embodiment, the valve body includes a first housing sleeved on the outside of the blocking part, a rotating member sleeved on the first housing and rotatable relative to the first housing about an axis, and a toggle member. A spirally rising sliding groove is formed on the peripheral side wall of the first housing. One end of the toggle member is connected to the blocking part, and the other end of the toggle member passes through the sliding groove and is engaged with the rotating member. The sliding groove has a first groove end and a second groove end.

[0028] When the rotating member rotates about the axis relative to the first housing, it drives the actuating member to slide in the groove. When the actuating member slides to the first groove end, the side leakage valve is in a normally closed state, and when the actuating member slides to the second groove end, the side leakage valve is in an open state.

[0029] By adopting the above technical solution, the rotating component drives the actuating component to realize the valve core spirally rising or falling relative to the first housing, thereby realizing the opening or closing of the side leakage valve.

[0030] In one embodiment, the rotating component has a notch for fitting into a screw of a vent connector.

[0031] By adopting the above technical solution, the notch is used to match the screw of the vent connector, so that when the vent connector rotates around the axis, it drives the rotating part to rotate around the axis relative to the first housing.

[0032] In one embodiment, the valve body includes a second housing sleeved on the rotating member and a connecting member disposed within the second housing and communicating with the first housing, the second housing being inserted into the outer shell.

[0033] By adopting the above technical solution, the second housing is used for plug-in connection with the outer housing, and the connector serves as a guide for air.

[0034] Secondly, this application embodiment also provides a side leakage valve, including a valve body and a valve core. The valve body includes a first housing, a rotating member sleeved on the first housing, a second housing sleeved on the rotating member, a connecting member disposed in the second housing and connected to the first housing, and a toggle member. The first housing is provided with an air guide channel, including a first channel, a second channel, and a third channel that are sequentially connected along the axial direction of the valve body.

[0035] The valve core includes a plugging part and a main body part connected to the plugging part, and the plugging part is provided with a sealing element and a first sealing ring;

[0036] The first housing has a spirally rising groove on its peripheral sidewall. One end of the actuating member is connected to the sealing part, and the other end of the actuating member passes through the groove and is engaged with the rotating member. The groove has a first groove end and a second groove end.

[0037] The second channel includes a third sub-segment and a fourth sub-segment that are connected to each other. The third sub-segment is connected to the first channel, and the inner diameter of the third sub-segment gradually increases along the axial direction of the valve body.

[0038] When the rotating member rotates about an axis relative to the first housing, it drives the actuating member to slide within the groove. When the actuating member slides to the end of the first groove, the sealing part blocks the first channel, the sealing member abuts against the third sub-section, and the first sealing ring abuts against the inner wall of the third channel and blocks the second channel, and the side leakage valve is in a normally closed state. When the actuating member slides to the end of the second groove, the first channel communicates with the outside, the sealing member separates from the inner wall of the third sub-section, the first sealing ring separates from the inner wall of the third channel, and the side leakage valve is in an open state.

[0039] The beneficial effects of this utility model are as follows: In the normally closed state, the side-leaking valve provided by this utility model has a sealing element that blocks the third segment of the second channel to reduce the probability of water vapor entering the ventilation gap. Additionally, the first sealing ring abuts against the inner wall of the third channel to block the second channel. In the open state, external airflow can enter the housing through the first, second, and third channels. The side-leaking valve provided by this application has higher ventilation efficiency and waterproof sealing performance.

[0040] In one embodiment, the sealing part (221) is provided with a sealing element (23) and a first sealing ring (24);

[0041] The second channel (21a2) includes a third sub-segment (21a21) and a fourth sub-segment (21a22) that are connected. The third sub-segment (21a21) is connected to the first channel (21a1), and the inner diameter of the third sub-segment (21a21) gradually increases along the axial direction of the valve body (21).

[0042] When the side leakage valve (20) is in the normally closed state, the sealing element (23) abuts against the third sub-section (21a21), and the first sealing ring (24) abuts against the inner wall of the third channel (21a3) and blocks the second channel (21a2); when the side leakage valve (20) is in the open state, the sealing element (23) is separated from the inner wall of the third sub-section (21a21), and the first sealing ring (24) is separated from the inner wall of the third channel (21a3).

[0043] Thirdly, embodiments of this application also provide an endoscope system, including a display, a light source host, an image processing device, and the endoscope described above; or, including a light source host, an image processing device, and the side leakage valve described above.

[0044] Understandably, the beneficial effects of the third aspect of this application can be referred to the beneficial effects stated in the first aspect, and will not be repeated here. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is a schematic diagram of the structure of an endoscope provided in an embodiment of the present invention;

[0047] Figure 2 A cross-sectional view of the endoscope connection portion adapted to the side leakage valve provided in an embodiment of this utility model;

[0048] Figure 3 A schematic diagram of the side leakage valve of the endoscope provided in an embodiment of this utility model;

[0049] Figure 4 Exploded view of the side leakage valve of the endoscope provided in an embodiment of this utility model;

[0050] Figure 5 A cross-sectional view of the side leakage valve of the endoscope provided in the embodiment of this utility model in the normally closed state;

[0051] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0052] Figure 7 A cross-sectional view of the side leakage valve of the endoscope provided in the embodiment of this utility model in the open state;

[0053] Figure 8 for Figure 7 Enlarged view at point B in the middle;

[0054] Figure 9 A schematic diagram of the structure of the first housing of the valve body of the endoscope side leakage valve provided in this embodiment of the utility model;

[0055] Figure 10 for Figure 9 Cross-sectional view at point CC;

[0056] Figure 11 A cross-sectional view of the first housing of the valve body of the endoscope side leakage valve provided in an embodiment of the present utility model from another angle;

[0057] Figure 12 A schematic diagram of the valve core of the side leakage valve of the endoscope provided in this embodiment of the utility model;

[0058] Figure 13 A cross-sectional view of the valve core of the side leakage valve of the endoscope provided in this embodiment of the utility model;

[0059] Figure 14 A cross-sectional view of the valve core of the side leakage valve of the endoscope provided in this embodiment of the present utility model from another angle;

[0060] Figure 15 A cross-sectional view of the side leakage valve of the endoscope provided in an embodiment of the present utility model from another angle;

[0061] Figure 16 A cross-sectional view of the endoscope's side leakage valve and vent connector assembled according to an embodiment of the present utility model;

[0062] Figure 17 A schematic diagram of the rotating component of the valve body of the endoscope's side leakage valve provided in this embodiment of the utility model.

[0063] The following are the labeling elements in the figure:

[0064] 100. Endoscope;

[0065] 10. Main body; 11. Outer shell;

[0066] 20. Side leakage valve; 21. Valve body; 21a. Air guide channel; 21a1. First channel; 21a2. Second channel; 21a3. Third channel; 21a31. First sub-segment; 21a32. Second sub-segment; 21a21. Third sub-segment; 21a22. Fourth sub-segment; 211. First housing; 212. Rotating component; 213. Actuating component; 21b. Slide groove; 21b1. First groove end; 21b2. Second groove end; 21c. Channel; 21d. Notch; 214. Second housing; 215. Connecting component; 22. Valve core; 221. Sealing part; 222. Main body; 22a. Contact surface; 22b. Milled surface; 22c. First air passage; 22d. Second air passage; 23. Sealing component; 24. First sealing ring; 25. Third sealing ring; 26. Fourth sealing ring.

[0067] 200. Vent connector; 201. Second sealing ring; 202. Screw. Detailed Implementation

[0068] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0069] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0070] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0071] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0072] Typically, an endoscope consists of a main body, an operating section, and an insertion section. The main body connects to the light source unit of the endoscope system, transmitting the light to the insertion section. The operating section is for medical personnel to hold and operate, adjusting the curvature of the insertion section. The end of the insertion section furthest from the operating section may have a lifter or lens installed, depending on the actual usage requirements. Medical personnel control the lifter and zoom the lens image by operating the relevant parts of the operating section.

[0073] In relevant technical solutions, the side-leak valve is a crucial component for reusable endoscopes to meet the corresponding airtightness testing requirements. Typically, the side-leak valve is normally closed and needs to meet certain waterproofing requirements. Therefore, when open, the valve core and valve core housing of the side-leak valve are in a clearance fit. This results in low air intake efficiency for the side-leak valve when external ventilation equipment ventilates the endoscope through it. Furthermore, during airtightness testing, gas must be expelled from inside the endoscope, which also leads to low venting efficiency of the side-leak valve. Consequently, the entire airtightness testing process is time-consuming.

[0074] In view of this, this application provides an endoscope whose side leakage valve includes a valve body and a valve core. The valve body has an air guiding channel, which includes a first channel and a second channel that are sequentially connected along the axial direction of the valve body. Since the inner diameter of the second channel is larger than that of the first channel, after the sealing part moves into the second channel, a larger air gap with a larger cross-sectional area is formed between the peripheral sidewall of the sealing part and the inner wall of the second channel, which can better meet the inflow or outflow of gas, thereby improving the detection efficiency of the reusable endoscope in airtightness testing.

[0075] Firstly, please refer to Figures 1 to 8 This application provides an endoscope 100, including a connecting part 10 and a side leakage valve 20.

[0076] The connecting part 10 includes a housing 11; the side leakage valve 20 includes a valve body 21 and a valve core 22. The valve body 21 is inserted into the housing 11. The valve body 21 has an air guide channel 21a. The valve core 22 can move in the air guide channel 21a along the axial direction of the valve body 21.

[0077] The air guide channel 21a includes a first channel 21a1 and a second channel 21a2 that are sequentially connected along the axial direction of the valve body 21. The inner diameter of the second channel 21a2 is larger than the inner diameter of the first channel 21a1. The valve core 22 includes a blocking part 221. In the normally closed state, the blocking part 221 is placed in the first channel 21a1 and the second channel 21a2, and the blocking part 221 is in clearance fit with the first channel 21a1. In the open state, the blocking part 221 moves along the axial direction of the valve body 21 into the second channel 21a2.

[0078] Understandably, the connecting part 10 is mainly used to connect with external light source devices, ultrasonic processing units, etc., and its housing 11 is the carrier of the connecting part 10 and is also connected to other parts of the endoscope, such as the operating part and the insertion part.

[0079] The valve body 21 is the fixed part of the side leakage valve 20, used for insertion and connection with the outer casing 11. The valve core 22 is the movable part of the side leakage valve 20, that is, the valve core 22 can move relative to the valve body 21 along the axial direction of the valve body 21 to realize the opening or closing of the side leakage valve 20. Here, the movement of the valve core 22 relative to the valve body 21 can be relative to the axial direction of the valve body 21, or the axial direction of the valve body 21 can be a spiral upward or downward movement.

[0080] The air guide channel 21a is a channel structure for connecting to an external ventilation device. The first channel 21a1 and the second channel 21a2 are two parts of the air guide channel 21a, and gas passes through the first channel 21a1 and the second channel 21a2 sequentially. Both the first channel 21a1 and the second channel 21a2 have a circular or substantially circular cross-section, and therefore their inner diameters are identical. Furthermore, the first channel 21a1 and the second channel 21a2 can be arranged concentrically, that is, their centerlines are coaxial, or they can be arranged eccentrically.

[0081] Since the side leakage valve 20 is normally closed when not in use, the first channel 21a1 and the sealing part 221 are in a clearance fit. This allows for relative movement while the sealing part 221 also seals the first channel 21a1, thus sealing the air passage 21a. Furthermore, when the side leakage valve 20 is open, because the inner diameter of the second channel 21a2 is larger than that of the first channel 21a1, the gap between the peripheral wall of the sealing part and the inner wall of the second channel 21a2 should be larger than the gap between the sealing part and the inner wall of the first channel 21a1. This means the cross-sectional area of ​​the ventilation gap is larger, resulting in a higher airflow rate per unit time, thereby shortening the inflation or deflation time of the endoscope by the external channel device.

[0082] To further increase the airflow of the air guide channel 21a, when the valve core 22 moves relative to the valve body 21, the blocking part 221 moves from the first channel 21a1 to the second channel 21a2. That is, in the open state, the blocking part 221 does not interfere with the first channel 21a1, so that the gas can pass through the first channel 21a1 quickly. At the same time, the inner diameter of the second channel 21a2 is larger than the inner diameter of the first channel 21a1. Therefore, compared with the entire structure of the air passage having a clearance fit with the valve core 22 and not classifying the size of the inner diameter of the air passage, the airflow of the air guide channel 21a in the open state is significantly improved.

[0083] The fact that the inner diameter of the second channel 21a2 is greater than the inner diameter of the first channel 21a1 can be understood as follows: when the inner diameter of the channel is a constant value, then the inner diameter of the second channel 21a2 at all points is greater than the inner diameter of the first channel 21a1 at all points; while when the inner diameter of the channel is inconsistent, that is, when there are differences in the size of the inner diameter at various points of the second channel, the minimum inner diameter of the second channel 21a2 should be greater than the maximum inner diameter of the first channel 21a1.

[0084] For example, the inner diameter of the first channel 21a1 is the same at all points, and the inner diameter of the second channel 21a2 is the same at all points, so that both the first channel 21a1 and the second channel 21a2 are straight cylindrical structures with columnar cross-sections.

[0085] For example, the inner diameter of the first channel 21a1 is the same at all points, and the inner wall of the second channel 21a2 has a groove along its axial direction, which causes the inner diameter of the groove in the second channel 21a2 to be larger than the inner diameter at other points.

[0086] Before performing an airtightness test, the endoscope provided by this utility model has its sealing portion 221 of the valve core 22 placed in the first channel 21a1 and the second channel 21a2 to seal the air guide channel 21a, so that the side leakage valve 20 is in a normally closed state. During the airtightness test, the valve core 22 moves along the axial direction of the valve body 21 in the air guide channel 21a, and the sealing portion 221 separates from the first channel 21a1 and moves into the second channel 21a2. Since the inner diameter of the second channel 21a2 is larger than that of the first channel 21a1, after the sealing portion 221 moves into the second channel 21a2, a larger air gap with a larger cross-sectional area is formed between the peripheral sidewall of the sealing portion 221 and the inner wall of the second channel 21a2, which can better meet the inflow or outflow of gas, thereby improving the detection efficiency of the reusable endoscope in the airtightness test.

[0087] Please refer to Figures 5 to 10In some embodiments, the air guide channel 21a further includes a third channel 21a3 connected to the second channel 21a2, the inner diameter of the third channel 21a3 being larger than that of the second channel 21a2, and the valve core 22 including a main body 222 connected to the sealing part 221, the main body 222 being placed inside the third channel 21a3, and the outer diameter of the main body 222 being larger than that of the sealing part 221.

[0088] The side leakage valve 20 includes a first sealing ring 24, which is sleeved on the sealing part 221 and placed in the third channel 21a3. In the normally closed state, the first sealing ring 24 abuts against the inner wall of the third channel 21a3 and seals the second channel 21a2. In the open state, the first sealing ring 24 is separated from the inner wall of the third channel 21a3.

[0089] Understandably, the third channel 21a3 is another section of the air guide channel 21a. The third channel 21a3 is connected to the second channel 21a2. Therefore, the external airflow passes through the first channel 21a1 and the second channel 21a2 in sequence before entering the third channel 21a3.

[0090] The main body 222 is the main part of the valve core 22. The main body 222 is connected to the sealing part 221. Here, the two can be integrally formed, or they can be detachably connected. Furthermore, the outer diameter of the main body 222 is larger than the outer diameter of the sealing part 221, so that a stepped structure is formed at the connection between the main body 222 and the sealing part 221. This also allows the first sealing ring 24 to be engaged at the connection between the main body 222 and the sealing part 221 when it abuts against the inner wall of the third channel 21a3 and seals the second channel 21a2.

[0091] In summary, in the normally closed state, the first sealing ring 24 abuts against the inner wall of the third channel 21a3 and blocks the second channel 21a2. That is, the first sealing ring 24 separates the first channel 21a1, the second channel 21a2 and the third channel 21a3, and external water vapor cannot enter the interior of the endoscope through the side leakage valve 20. However, in the open state, the first sealing ring 24 separates from the inner wall of the third channel 21a3, thereby enabling the third channel 21a3 to be connected to the second channel 21a2.

[0092] Thus, when the side leakage valve 20 is in the normally closed state, the first sealing ring 24 abuts against the inner wall of the third channel 21a3 and blocks the second channel 21a2. When the side leakage valve 20 is in the open state, the first sealing ring 24 moves with the blocking part 221 and separates from the inner wall of the third channel 21a3, so that the second channel 21a2 and the third channel 21a3 are connected.

[0093] Please refer to Figure 5 and Figure 10In one embodiment, the third channel 21a3 includes a first sub-segment 21a31 and a second sub-segment 21a32 that are connected to each other. The first sub-segment 21a31 is connected to the second channel 21a2. The inner diameter of the first sub-segment 21a31 is larger than the inner diameter of the second sub-segment 21a32. The main body 222 is in clearance fit with the second sub-segment 21a32.

[0094] Understandably, the first sub-segment 21a31 and the second sub-segment 21a32 are two interconnected channel segments of the third channel 21a3. Since the valve core 22 needs to move relative to the valve body 21, to improve the stability and accuracy of the valve core 22's movement during this relative movement, the main body 222 and the second sub-segment 21a32 are fitted with a clearance. Simultaneously, the inner diameter of the first sub-segment 21a31 is larger than the inner diameter of the second sub-segment 21a32, resulting in a larger gap between the inner wall of the first sub-segment 21a31 and the peripheral wall of the main body 222, allowing external gas to enter the endoscope more smoothly.

[0095] Thus, the main body 222 and the second sub-section 21a32 are fitted with a gap to ensure the stability of the valve core 22 when it moves relative to the valve body 21. In addition, the inner wall of the first sub-section 21a31 and the peripheral wall of the main body 222 form a ventilation gap with a larger cross-sectional area, which can better meet the needs of gas inflow or outflow.

[0096] Please refer to Figure 14 and Figure 15 In one embodiment, the peripheral sidewall of the main body 222 includes a contact surface 22a that mates with the second sub-segment 21a32 and at least one milled surface 22b, the milled surface 22b and the inner wall of the second sub-segment 21a32 enclosing a ventilation gap.

[0097] Understandably, the contact surface 22a is a surface structure in the peripheral sidewall of the main body 222 that fits with the second sub-segment 21a32 with a clearance, and the milled surface 22b is a surface structure in the peripheral sidewall of the main body 222 that forms a ventilation gap with the inner wall of the second sub-segment 21a32. Typically, the milled surface 22b is a plane, while the contact surface 22a is an arc-shaped surface that fits with the inner wall of the second sub-segment 21a32. Of course, the milled surface 22b can also be a non-plane surface such as an arc-shaped surface or a wave-shaped surface, as long as it can form a ventilation gap with the inner wall of the second sub-segment 21a32.

[0098] Since the main body 222 and the second sub-segment 21a32 are in clearance fit, the gas flow rate is easily reduced. Therefore, it is necessary to provide a milled surface 22b on the peripheral sidewall of the main body 222. This will improve the stability of the movement of the main body 222 relative to the second sub-segment 21a32 and further increase the cross-sectional area of ​​the ventilation gap.

[0099] Furthermore, the number of milled surfaces 22b can be adjusted according to actual usage requirements. For example, the number of milled surfaces 22b can be one, or the number of milled surfaces 22b can be two, and the two milled surfaces 22b are connected by a contact surface 22a.

[0100] Thus, only the contact surface 22a of the peripheral sidewall of the main body 222 is in clearance fit with the second sub-segment 21a32, while the milled surface 22b forms a ventilation gap with the inner wall of the second sub-segment 21a32.

[0101] Please refer to Figure 14 and Figure 15 In one embodiment, there are three milling surfaces 22b, and each milling surface 22b is alternately connected to the contact surface 22a in sequence. A groove 21c corresponding to the milling surface 22b is formed on the inner wall of the second sub-segment 21a32.

[0102] Understandably, there must be a contact surface 22a between two adjacent milled surfaces 22b to ensure that the milled surfaces 22b and the contact surface 22a are alternately arranged. At the same time, to a certain extent, it can also reduce the probability of misalignment when the main body 222 moves relative to the second sub-segment 21a32 due to the direct connection of the two milled surfaces 22b.

[0103] The channel 21c should be an axial extension along the second sub-segment 21a32 to form a channel structure, in order to increase the cross-sectional area of ​​the ventilation gap.

[0104] In this way, the cross-sectional area of ​​the ventilation gap is maximized, and the connection stability of the main body 222 relative to the second sub-segment 21a32 is also guaranteed.

[0105] Please refer to Figure 15 In one embodiment, the main body 222 moves spirally upward or downward relative to the valve body 21, and the circumferential arc length of at least one contact surface 22a is greater than the width of any channel 21c.

[0106] Understandably, the valve core 22 rotates spirally around the central axis of the valve body 21. Therefore, the main body 222 moves spirally upward or downward relative to the valve body 21. That is, the main body 222 moves spirally upward or downward relative to the second sub-segment 21a32. The contact surface 22a of the main body 222 will rotate spirally on the inner wall of the second sub-segment 21a32.

[0107] The circumferential arc length of the contact surface 22a refers to the length of the contact surface 22a in the circumferential direction of the main body 222, similar to the perimeter. When the circumferential arc length of the contact surface 22a is greater than the width of the channel 21c, the probability of the contact surface 22a getting stuck in the channel 21c as the main body 222 rotates around the spiral is lower, which can further improve the stability of the main body 222 when it rotates relative to the valve body 21.

[0108] Optionally, such as Figure 11 , Figure 15 As shown, there are three milled surfaces 22b, and a contact surface 22a connects two adjacent milled surfaces 22b. Two channels 21c are provided on the second sub-segment 21a32. When the side leakage valve 20 is in the open state, the channel 21c corresponds to the corresponding milled surface 22b. However, when the side leakage valve 20 switches from the open state to the normally closed state, two of the contact surfaces 22a cannot correspond to two of the channels 21c at the same time. That is, the positions of the two contact surfaces 22a do not match the spacing between the channels 21c.

[0109] Thus, when the main body 222 spirals up and down or descends relative to the valve body 21, the movement of each contact surface 22a relative to the inner wall of the second sub-segment 21a32 can only improve the smoothness of the relative rotation of the main body 222 relative to the second sub-segment 21a32 when the circumferential arc length of the contact surface 22a is greater than the width of any channel 21c.

[0110] Please refer to Figures 12 to 14 In one embodiment, a first air passage 22c is provided on the peripheral sidewall of the main body 222; and / or, a first air passage 22c is provided on the peripheral sidewall of the blocking part 221, and a second air passage 22d is provided at the end of the main body 222 away from the blocking part 221, wherein the first air passage 22c and the second air passage 22d are connected.

[0111] Understandably, the first airway 22c is radially or similarly radially inserted into the main body 222 and / or the blocking part 221, and the number of first airways 22c can be adjusted according to actual usage requirements. The second airway 22d is axially or similarly axially inserted into the blocking part 221. The first airway 22c and the second airway 22d are connected so that gas can enter the second airway 22d from the first airway 22c and finally enter the interior of the endoscope.

[0112] Thus, by adding a first air passage 22c to the main body 222 and / or the sealing part 221, and by connecting the first air passage 22c to the second air passage 22d, the air intake of the side leakage valve 20 can be further increased.

[0113] Please refer to Figure 7 , Figure 8 , Figure 10 and Figure 12In one embodiment, the second channel 21a2 includes a third sub-segment 21a21 and a fourth sub-segment 21a22 that are connected to each other. The third sub-segment 21a21 is connected to the first channel 21a1. The inner diameter of the third sub-segment 21a21 gradually increases along the axial direction of the valve body 21. The valve core 22 includes a sealing element 23 disposed on the sealing portion 221. In the normally closed state, the sealing element 23 abuts against the inner wall of the third sub-segment 21a21. In the open state, the sealing element 23 is separated from the inner wall of the third sub-segment 21a21.

[0114] Understandably, in the normally closed state, although the first channel 21a1 and the sealing part 221 are in a gap fit, external moisture still has a certain probability of entering the gap, and a "water retention" phenomenon occurs in the gap between the second channel 21a2 and the sealing part 221. To solve this problem, the second channel 21a2 is divided into a third sub-segment 21a21 and a fourth sub-segment 21a22. The cross-sectional shape of the third sub-segment 21a21 is trapezoidal. At the same time, a sealing element 23 is added to the sealing part 221. In the normally closed state, the sealing element 23 abuts against the inner wall of the third sub-segment 21a21. Then, external moisture will only enter the gap between the first channel 21a1 and the sealing part 221, and will not enter the second channel 21a2, further improving the waterproofness of the side leakage valve 20 in the normally closed state.

[0115] Thus, the addition of sealing element 23 can further reduce the probability of water accumulation in the side leakage valve 20 under normal closed state, thereby reducing the probability of water vapor corroding the internal components of the endoscope.

[0116] Please refer to Figure 3 , Figure 4 , Figure 5 and Figure 7 In one embodiment, the valve body 21 includes a first housing 211 sleeved on the outside of the sealing part 221, a rotating member 212 sleeved on the first housing 211 and rotatable relative to the first housing 211 about an axis, and a toggle member 213. A spirally rising slide groove 21b is provided on the peripheral side wall of the first housing 211. One end of the toggle member 213 is connected to the sealing part 221, and the other end of the toggle member 213 passes through the slide groove 21b and is engaged with the rotating member 212. The slide groove 21b has a first groove end 21b1 and a second groove end 21b2.

[0117] When the rotating member 212 rotates around the axis relative to the first housing 211, it drives the actuating member 213 to slide in the slide groove 21b. When the actuating member 213 slides to the first groove end 21b1, the side leakage valve 20 is in a normally closed state. When the actuating member 213 slides to the second groove end 21b2, the side leakage valve 20 is in an open state.

[0118] Understandably, the first housing 211 is a support and load-bearing structure directly adapted to the valve core 22. Therefore, the first channel 21a1, the second channel 21a2, and the third channel 21a3 should all be located within the first housing 211. The rotating component 212 is a rotating or near-rotating structure, sleeved on the outside of the first housing 211 and rotatable about the axis of the first housing 211. The actuating component 213 is a structural component used to drive the valve core 22 to spirally rise or fall relative to the first housing 211 about an axis. Furthermore, the actuating component 213 is guided by the slide groove 21b and slides within the slide groove 21b. Since the slide groove 21b spirals upward on the first housing 211, there is a height difference between the first groove end 21b1 and the second groove end 21b2. The first groove end 21b1 and the second groove end 21b2 are the starting and ending positions of the slide groove 21b.

[0119] The movement of valve core 22 relative to valve body 21 is as follows: When the actuating member 213 is at the first groove end 21b1 of the slide groove 21b, the sealing part 221 of valve core 22 blocks the first channel 21a1 of the first housing 211, so that the side leakage valve 20 is in a normally closed state. When the rotating member 212 is rotated, the actuating rod rotates with the rotating member 212. Under the guidance of the slide groove 21b, the actuating rod slides from the first groove end 21b1 of the slide groove 21b to the second groove end 21b2. At the same time, the actuating rod also drives the sealing part 221 of valve core 22 to release the blockage of the first channel 21a1 and move into the second channel 21a2. At this time, the side leakage valve 20 is in an open state. Here, the height difference between the first groove end 21b1 and the second groove end 21b2 is the moving distance of the sealing part 221 of the valve core 22 relative to the first housing 211. Therefore, the clearance fit length between the first channel 21a1 and the sealing part 221 can be designed based on this height difference.

[0120] Thus, by using the rotating component 212 to drive the actuating component 213, the valve core 22 is made to spiral up or down relative to the first housing 211, thereby opening or closing the side leakage valve 20.

[0121] Please refer to Figure 16 and Figure 17 In one embodiment, the rotating member 212 is provided with a notch 21d for fitting with the screw 202 of the vent connector 200.

[0122] Understandably, during use, the vent connector 200 is fitted onto the valve body 21, and the screw 202 of the vent connector 200 is engaged in the notch 21d of the rotating part 212. By rotating the vent connector 200, the screw 202 drives the rotating part 212 to rotate around the axis.

[0123] Thus, the notch 21d is adapted to fit with the screw 202 of the vent connector 200, so as to drive the rotating member 212 to rotate relative to the first housing 211 when the vent connector 200 rotates about the axis.

[0124] Optionally, as shown in the figure, the vent connector 200 is provided with a second sealing ring 201, which abuts against the outside of the valve body 21. Here, the second sealing ring 201 is used to improve the sealing between the vent connector 200 and the valve body 21.

[0125] Please refer to Figure 3 and Figure 4 In one embodiment, the valve body 21 includes a second housing 214 sleeved on the rotating member 212 and a connector 215 disposed in the second housing 214 and communicating with the first housing 211. The second housing 214 is inserted into the outer shell 11.

[0126] Understandably, the second housing 214 is a fixed part in the valve body 21, used to support the rotating part 212 and the first housing 211, while the connecting part 215 is a structural part used to realize the introduction of gas into the endoscope, so as to satisfy the gas inflow or outflow of the side leakage valve 20.

[0127] Thus, the second housing 214 is used for plug-in connection with the outer housing 11, and the connector 215 serves as a guide for air.

[0128] Alternatively, please refer to Figure 4 , Figure 5 and Figure 7 A third sealing ring 25 is provided on the outer wall of the rotating component 212, and the third sealing ring 25 abuts against the second housing 214. Here, the third sealing ring 25 is used to improve the sealing between the rotating component 212 and the second housing 214.

[0129] Alternatively, please refer to Figure 4 , Figure 5 and Figure 7 A fourth sealing ring 26 is provided on the outer wall of the second housing 214, and the fourth sealing ring 26 abuts against the connecting part. Here, the fourth sealing ring 26 is used to improve the sealing between the rotating part 212 and the second housing 214.

[0130] Please refer to Figures 3 to 15Secondly, this application provides a side leakage valve 20, including a valve body 21 and a valve core 22. The valve body 21 includes a first housing 211, a rotating member 212 sleeved on the first housing 211, a second housing 214 sleeved on the rotating member 212, a connecting member 215 disposed in the second housing 214 and communicating with the first housing 211, and a toggle member 213. The first housing 211 is provided with an air guide channel 21a, including a first channel 21a1, a second channel 21a2, and a third channel 21a3 sequentially connected along the axial direction of the valve body 21.

[0131] The valve core 22 includes a sealing part 221 and a main body part 222 connected to the sealing part 221. The sealing part 221 is provided with a sealing element 23 and a first sealing ring 24.

[0132] The first housing 211 has a spirally rising groove 21b on its peripheral sidewall. One end of the actuating member 213 is connected to the sealing part 221, and the other end of the actuating member 213 passes through the groove 21b and is engaged with the rotating member 212. The groove 21b has a first groove end 21b1 and a second groove end 21b2.

[0133] The second channel 21a2 includes a third sub-segment 21a21 and a fourth sub-segment 21a22 that are connected to each other. The third sub-segment 21a21 is connected to the first channel 21a1, and the inner diameter of the third sub-segment 21a21 gradually increases along the axial direction of the valve body 21.

[0134] When the rotating member 212 rotates around the axis relative to the first housing 211, it drives the actuating member 213 to slide in the groove 21b. When the actuating member 213 slides to the first groove end 21b1, the sealing part 221 seals the first channel 21a1, the sealing member 23 abuts against the third sub-section 21a21, the first sealing ring 24 abuts against the inner wall of the third channel 21a3 and seals the second channel 21a2, and the side leakage valve 20 is in a normally closed state. When the actuating member 213 slides to the second groove end 21b2, the first channel 21a1 is connected to the outside, the sealing member 23 is separated from the inner wall of the third sub-section 21a21, the first sealing ring 24 is separated from the inner wall of the third channel 21a3, and the side leakage valve 20 is in an open state.

[0135] The side-leaking valve 20 provided by this utility model, in its normally closed state, has a sealing element 23 that blocks the third segment 21a21 of the second channel 21a2 to reduce the probability of water vapor entering the ventilation gap, and a first sealing ring 24 that abuts against the inner wall of the third channel 21a3 to block the second channel 21a2; in its open state, external airflow can enter the housing 11 through the first channel 21a1, the second channel 21a2, and the third channel 21a3. The side-leaking valve 20 provided by this application has higher ventilation efficiency and waterproof sealing performance.

[0136] Secondly, embodiments of this application also provide an endoscope system, including a light source host, an image processing device, and the aforementioned endoscope 100. It should be noted that in some embodiments, the light source host and the image processing device can be integrated into a single unit, i.e., they are the same device. In this case, the endoscope 100 system can also be described as including: a display, a host, and the aforementioned endoscope 100.

[0137] Understandably, the beneficial effects of the second aspect of this application can be referred to the beneficial effects stated in the first aspect, and will not be repeated here.

[0138] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An endoscope (100), characterized in that, include: A connecting part (10) includes a housing (11); A side leakage valve (20) includes a valve body (21) and a valve core (22). The valve body (21) is inserted into the outer shell (11). The valve body (21) has an air guide channel (21a). The valve core (22) can move along the axial direction of the valve body (21) within the air guide channel (21a). The air guide channel (21a) includes a first channel (21a1) and a second channel (21a2) that are sequentially connected along the axial direction of the valve body (21). The inner diameter of the second channel (21a2) is larger than the inner diameter of the first channel (21a1). The valve body (21) includes a blocking part (221). In the normally closed state, the blocking part (221) is placed in the first channel (21a1) and the second channel (21a2), and the blocking part (221) is in clearance fit with the first channel (21a1). In the open state, the blocking part (221) can move along the axial direction of the valve body (21) into the second channel (21a2).

2. The endoscope (100) of claim 1, characterized in that: The air guide channel (21a) further includes a third channel (21a3) connected to the second channel (21a2), the inner diameter of the third channel (21a3) being larger than that of the second channel (21a2), the valve core (22) including a main body (222) connected to the sealing part (221), the main body (222) being placed inside the third channel (21a3), and the outer diameter of the main body (222) being larger than that of the sealing part (221); The side leakage valve (20) includes a first sealing ring (24), which is sleeved on the sealing part (221) and placed inside the third channel (21a3). In the normally closed state, the first sealing ring (24) abuts against the inner wall of the third channel (21a3) and seals the second channel (21a2). In the open state, the first sealing ring (24) is separated from the inner wall of the third channel (21a3).

3. The endoscope (100) of claim 2, characterized in that: The third channel (21a3) includes a first sub-segment (21a31) and a second sub-segment (21a32) that are connected to each other. The first sub-segment (21a31) is connected to the second channel (21a2). The inner diameter of the first sub-segment (21a31) is larger than the inner diameter of the second sub-segment (21a32). The main body (222) is in clearance fit with the second sub-segment (21a32).

4. The endoscope (100) of claim 3, characterized in that: The peripheral sidewall of the main body (222) includes a contact surface (22a) that mates with the second sub-segment (21a32) and at least one milled surface (22b), wherein the milled surface (22b) and the inner wall of the second sub-segment (21a32) enclose a ventilation gap.

5. The endoscope (100) of claim 4, characterized in that: The number of milled surfaces (22b) is three, and each milled surface (22b) is alternately connected to the contact surface (22a) in sequence. The inner wall of the second sub-segment (21a32) has a groove (21c) corresponding to the milled surface (22b).

6. The endoscope (100) of claim 5, characterized in that: The main body (222) is capable of spirally moving upward or downward relative to the valve body (21), and the circumferential arc length of at least one of the contact surfaces (22a) is greater than the width of any one of the channels (21c).

7. The endoscope (100) according to any one of claims 2 to 5, characterized in that: A first air passage (22c) is provided on the peripheral sidewall of the main body (222); and / or, a first air passage (22c) is provided on the peripheral sidewall of the sealing part (221), and a second air passage (22d) is provided at the end of the main body (222) away from the sealing part (221), wherein the first air passage (22c) and the second air passage (22d) are connected.

8. The endoscope (100) according to any one of claims 1 to 6, characterized in that: The second channel (21a2) includes a third sub-segment (21a21) and a fourth sub-segment (21a22) connected together. The third sub-segment (21a21) is connected to the first channel (21a1). The inner diameter of the third sub-segment (21a21) gradually increases along the axial direction of the valve body (21). The valve core (22) includes a sealing element (23) disposed on the sealing part (221). In the normally closed state, the sealing element (23) abuts against the inner wall of the third sub-segment (21a21). In the open state, the sealing element (23) is separated from the inner wall of the third sub-segment (21a21).

9. The endoscope (100) according to any one of claims 2 to 6, characterized in that: The valve body (21) includes a first housing (211) sleeved on the outside of the sealing part (221), a rotating part (212) sleeved on the first housing (211) and rotatable relative to the first housing (211) about an axis, and a toggle part (213). A spirally rising slide groove (21b) is provided on the peripheral side wall of the first housing (211). One end of the toggle part (213) is connected to the sealing part (221), and the other end of the toggle part (213) passes through the slide groove (21b) and is engaged with the rotating part (212). The slide groove (21b) has a first groove end (21b1) and a second groove end (21b2). When the rotating member (212) rotates about the axis relative to the first housing (211), it drives the actuating member (213) to slide in the slide groove (21b). When the actuating member (213) slides to the first groove end (21b1), the side leakage valve (20) is in a normally closed state. When the actuating member (213) slides to the second groove end (21b2), the side leakage valve (20) is in an open state.

10. The endoscope (100) of claim 9, characterized in that: The rotating part (212) has a notch (21d) for fitting with the screw (202) of the vent connector (200).

11. The endoscope (100) of claim 9, characterized in that: The valve body (21) includes a second housing (214) sleeved on the rotating member (212) and a connector (215) disposed in the second housing (214) and communicating with the first housing (211). The second housing (214) is inserted into the outer shell (11).

12. A side leakage valve (20) characterized by: The side leakage valve (20) includes a valve body (21) and a valve core (22). The valve body (21) includes a first housing (211), a rotating member (212) sleeved on the first housing (211), a second housing (214) sleeved on the rotating member (212), a connecting member (215) disposed in the second housing (214) and communicating with the first housing (211), and a toggle member (213). The first housing (211) is provided with an air guide channel (21a), including a first channel (21a1), a second channel (21a2) and a third channel (21a3) sequentially connected along the axial direction of the valve body (21). The valve core (22) includes a plugging part (221) and a main body part (222) connected to the plugging part (221); The first housing (211) has a spirally rising groove (21b) on its peripheral sidewall. One end of the actuating member (213) is connected to the sealing part (221), and the other end of the actuating member (213) passes through the groove (21b) and is engaged with the rotating member (212). The groove (21b) has a first groove end (21b1) and a second groove end (21b2). When the rotating member (212) rotates about the axis relative to the first housing (211), it drives the actuating member (213) to slide in the groove (21b). When the actuating member (213) slides to the first groove end (21b1), the sealing part (221) blocks the first channel (21a1), and the side leakage valve (20) is in a normally closed state. When the actuating member (213) slides to the second groove end (21b2), the first channel (21a1) is connected to the outside, and the side leakage valve (20) is in an open state.

13. The side leakage valve (20) according to claim 12, characterized in that: The sealing part (221) is provided with a sealing element (23) and a first sealing ring (24); The second channel (21a2) includes a third sub-segment (21a21) and a fourth sub-segment (21a22) that are connected. The third sub-segment (21a21) is connected to the first channel (21a1), and the inner diameter of the third sub-segment (21a21) gradually increases along the axial direction of the valve body (21). When the side leakage valve (20) is in the normally closed state, the sealing element (23) abuts against the third sub-section (21a21), and the first sealing ring (24) abuts against the inner wall of the third channel (21a3) and blocks the second channel (21a2); when the side leakage valve (20) is in the open state, the sealing element (23) is separated from the inner wall of the third sub-section (21a21), and the first sealing ring (24) is separated from the inner wall of the third channel (21a3).

14. An endoscope system characterized by comprising: It includes a light source host, an image processing device, and an endoscope (100) as described in any one of claims 1 to 11; or, it includes a light source host, an image processing device, and a side leakage valve (20) as described in claim 12 or 13.

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