A spliced type tee connector, handle and endoscope

Abstract

The application provides a spliced three-way connector, a handle and a endoscope, comprising a negative pressure channel, an instrument channel, a docking channel and a receiving chamber, the three-way connector further comprises a first half and a second half, one of the splicing surfaces of the first half and the second half is provided with an annular protrusion and a negative pressure connector, the negative pressure channel passes through the negative pressure connector, and the receiving chamber and the negative pressure connector are located inside the annular protrusion; the other of the splicing surfaces of the first half and the second half is provided with a first avoiding groove, and the first avoiding groove is used for avoiding the annular protrusion and the negative pressure connector. The application can guide the sealing damage position to occur inside the negative pressure channel, collect the leaked suction material through the receiving chamber, realize the prevention and treatment of the suction material leakage, thereby reducing the risk of suction material leakage and improving the use safety and convenience of the endoscope.

Description

Technical Field

[0001] This invention relates to the field of endoscope technology, and in particular to a splicing type three-way connector, handle, and endoscope. Background Technology

[0002] As one of the important medical devices in modern surgery, the endoscope includes an operating handle and an insertion part. The insertion part can be inserted into the human body through a body cavity or surgical incision. Through the camera module at the distal end of the insertion part, doctors can help determine the location of lesions in the patient's body and the tissue structure characteristics of the lesion location. The operating handle is equipped with a three-way connector, which connects the insertion part to the negative pressure channel and the instrument channel, respectively. This allows for the extraction of fluid in the body cavity through the negative pressure channel and the insertion of instruments through the instrument channel to sample or deliver therapeutic substances to human tissue.

[0003] T-connectors are generally injection molded. To reduce costs, a splicing design can be adopted for the t-connector, in which two halves are injection molded separately and then spliced ​​together. This improves the quality and efficiency of injection molding and reduces production costs. However, in the process of realizing this invention, the applicant discovered that the seal at the splicing point of the t-connector is easily damaged, which leads to the risk of leakage of liquids and other absorbent materials. Summary of the Invention

[0004] The purpose of this application is to provide a splicing type three-way connector, handle, and endoscope to solve the above-mentioned technical problems existing in the prior art, mainly including the following three aspects:

[0005] The first aspect of this application provides a splicing type three-way connector, including a negative pressure channel, an instrument channel, a docking channel, and a storage chamber. The negative pressure channel and the instrument channel are respectively connected to the docking channel, and the storage chamber is located between the negative pressure channel and the instrument channel. The three-way connector also includes a first half and a second half. The negative pressure channel is arranged on the first half and the second half. The instrument channel is at least partially arranged on the second half. The docking channel is arranged at the distal end of the second half. The storage chamber is arranged on the first half and the second half.

[0006] An annular protrusion and a negative pressure connector are provided on one of the splicing surfaces of the first half and the second half. The negative pressure channel passes through the negative pressure connector, and the storage chamber and the negative pressure connector are located inside the annular protrusion. A first clearance groove is provided on the other of the splicing surfaces of the first half and the second half. The first clearance groove is used to avoid the annular protrusion and the negative pressure connector.

[0007] Furthermore, at the junction of the first and second halves, the wall thickness of the negative pressure channel on the side closer to the storage chamber is less than the wall thickness on the side farther from the storage chamber.

[0008] Furthermore, the negative pressure connector coincides with the annular protrusion on the side wall away from the storage chamber.

[0009] Furthermore, an instrument connector is provided on one of the splicing surfaces of the first half and the second half, and the instrument channel passes through the instrument connector. A second clearance groove is provided on the other of the splicing surfaces of the first half and the second half, and the second clearance groove is used to avoid the instrument connector.

[0010] Furthermore, a cavity is provided between the side of the instrument connector away from the storage chamber and the annular protrusion, the cavity being used to bond the first half and the second half together.

[0011] Furthermore, the axis of the negative pressure channel is parallel to the axis of the annular protrusion;

[0012] And / or,

[0013] The outer wall surface of the instrument connector away from the storage chamber is parallel to the axis of the negative pressure channel, while the outer wall surface of the instrument connector near the storage chamber is parallel to the axis of the instrument channel.

[0014] Furthermore, the storage chamber is connected to the negative pressure channel.

[0015] Furthermore, a connecting groove is provided on the splicing surface of the first half or the splicing surface of the second half, the connecting groove being used to connect the storage chamber with the negative pressure channel;

[0016] or,

[0017] A gap is provided between the side of the negative pressure connector near the storage chamber and the inner wall of the first clearance groove, and the gap is used to enable the storage chamber to communicate with the negative pressure channel.

[0018] A second aspect of this application provides a handle including a housing and the aforementioned tee connector, the tee connector being located at the distal end of the housing.

[0019] A third aspect of this application provides an endoscope including the aforementioned three-way connector or the aforementioned handle, the endoscope further including an insertion portion, the distal end of the docking channel being used to connect with the proximal end of the insertion portion.

[0020] Compared with the prior art, the present invention has at least the following technical effects:

[0021] This invention addresses the issue of sealing differences between the inner and outer sides of a negative pressure channel. When the three-way connector is subjected to external force and potential seal damage occurs, the difference in resistance to seal damage between the inner and outer sides of the negative pressure channel guides the seal damage to occur on the inner side of the negative pressure channel. Consequently, when the aspirated material leaks at the connection point, it flows directly through the seal damage into the collection chamber for collection, thus preventing leakage and reducing the risk of leakage. This improves the safety and convenience of using the endoscope. Furthermore, the overall three-way connector structure is rationally designed, which is beneficial for the miniaturization of endoscopes. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the three-way connector of the present invention;

[0024] Figure 2 This is a side view of the three-way connector of the present invention;

[0025] Figure 3 yes Figure 2 Sectional view along line AA;

[0026] Figure 4 This is a front view of the three-way connector of the present invention;

[0027] Figure 5 yes Figure 4 Sectional view along the BB direction;

[0028] Figure 6 This is a schematic diagram of the structure of the first half of the present invention;

[0029] Figure 7 This is a bottom view of the first half of the present invention;

[0030] Figure 8 This is a schematic diagram of the structure of the second half of the present invention;

[0031] Figure 9 This is a top view of the second half of the present invention;

[0032] Figure 10 This is a schematic diagram of the structure of the endoscope of the present invention;

[0033] In the picture,

[0034] 10. Handle; 20. Insertion part;

[0035] 100, First half; 110, First clearance groove; 200, Second half; 210, Annular protrusion; 211, Cavity; 300, Negative pressure channel; 310, Negative pressure connector; 400, Instrument channel; 410, Instrument connector; 420, Second clearance groove; 500, Docking channel; 600, Storage chamber. Detailed Implementation

[0036] The following description provides many different embodiments or examples for implementing various features of the invention. The elements and arrangements described in the specific examples below are only for concise expression of the invention and are merely examples, not intended to limit the invention.

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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 a part of the embodiments of the present invention, not all of them. 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. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to represent selected embodiments of the invention. 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.

[0038] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," 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 invention according to the specific circumstances. Furthermore, the terms "first," "second," and "third," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0039] In this invention, unless otherwise expressly specified and limited, "above or below" a first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] Furthermore, in this invention, "proximal end" and "distal end" refer to the near and far positions of the structure relative to human operation in the usage environment, in order to facilitate the description of the positional relationship between components and to facilitate understanding; for the same component, "proximal end" and "distal end" are relative positional relationships of the component, not absolute ones; therefore, they should be understood from the perspective of realizing the principle of this invention, and should not deviate from the essence of this invention.

[0041] As one of the important medical instruments in modern surgery, the endoscope includes an operating handle and an insertion section. The insertion section can be inserted into the human body through a body cavity or surgical incision. By moving the lever on the operating handle, the active bending section at the distal end of the insertion section can be adjusted in posture. The camera module at the distal end of the insertion section can observe the internal tissues of the human body, helping doctors to determine the location of lesions and the tissue structure characteristics of the lesions. The operating handle is equipped with a three-way connector, which connects the insertion section to the negative pressure channel and the instrument channel respectively. During use, when it is necessary to treat fluid accumulation in the body cavity, the negative pressure source can be connected to the negative pressure channel to extract the fluid from the body cavity. When it is necessary to sample human tissue or deliver therapeutic substances into the human body, the treatment instrument can be inserted through the instrument channel to sample human tissue or deliver therapeutic substances.

[0042] In existing technologies, T-connectors are generally manufactured using injection molding. However, with upgrades and optimizations, the structure of T-connectors has become increasingly complex, leading to increased difficulty and cost in injection molding. Therefore, to reduce costs, a splicing structure design can be adopted for T-connectors, where two halves are injection molded separately and then spliced ​​together to form a complete T-connector. This reduces production costs and injection molding difficulty, while improving injection molding quality and efficiency. However, during the development of this invention, the applicant discovered that in T-connectors with a splicing design, the seal at the splice joint is easily damaged when subjected to external impact, creating gaps. This can lead to leakage of absorbent materials such as liquids through the negative pressure channel into the handle or the external environment, affecting the normal use of other components within the handle or causing pollution to the external environment. To address the leakage problem in splicing T-connectors, this application provides a splicing T-connector that reduces the risk of leakage, as illustrated in the following embodiment.

[0043] Example 1:

[0044] This application provides a splicing type tee connector, such as... Figures 1-5 As shown, the three-way connector includes a negative pressure channel 300, an instrument channel 400, a docking channel 500, and a receiving chamber 600. The proximal end of the negative pressure channel 300 is used to communicate with a negative pressure source, the proximal end of the instrument channel 400 is used to insert a treatment instrument, and the distal ends of the negative pressure channel 300 and the distal ends of the instrument channel 400 are respectively connected to the proximal end of the docking channel 500. The receiving chamber 600 is located between the negative pressure channel 300 and the instrument channel 400, and preferably the receiving chamber 600 is positioned close to the negative pressure channel 300. The three-way connector also includes a first half 100 and a second half 200. The negative pressure channel 300 is arranged on the first half 100 and the second half 200. The instrument channel 400 is at least partially arranged on the second half 200. In this embodiment, it is preferable that the instrument channel 400 is arranged on both the first half 100 and the second half 200. In some alternative embodiments, the instrument channel 400 may be arranged entirely on the second half 200. The docking channel 500 is arranged at the far end of the second half 200, and the storage chamber 600 is arranged on the first half 100 and the second half 200.

[0045] like Figure 8 As shown, the splicing surface of the second half 200 is provided with an annular protrusion 210 and a negative pressure connector 310. The negative pressure channel 300 passes through the negative pressure connector 310, and the storage chamber 600 and the negative pressure connector 310 are located inside the annular protrusion 210; Figure 6As shown, a first clearance groove 110 is provided on the splicing surface of the first half 100. The first clearance groove 110 is used to avoid the annular protrusion 210 and the negative pressure connector 310. Through the limiting cooperation between the first clearance groove 110 and the annular protrusion 210, the accurate positioning and splicing of the first half 100 and the second half 200 can be achieved, and the sealing cooperation between the splicing surfaces of the first half 100 and the second half 200 can be enhanced. In order to achieve a stable splicing of the first half 100 and the second half 200, adhesive can be applied to the annular protrusion 210 and the splicing surface outside the annular protrusion 210 to bond the first half 100 and the second half 200 together.

[0046] Based on the arrangement of the storage chamber 600 and the negative pressure connector 310 inside the annular protrusion 210, when the first half 100 and the second half 200 are assembled into a whole, the annular protrusion 210 can cooperate with the inner wall of the first clearance groove 110 to form a stepped sealing surface on the outer side of the negative pressure channel 300 (specifically, the top wall and outer sidewall of the annular protrusion 210 can cooperate with the inner wall of the first clearance groove 110 to form a stepped sealing surface). However, the inner side of the negative pressure channel 300, i.e., between the negative pressure channel 300 and the storage chamber 600, lacks a stepped sealing surface compared to the outer side of the negative pressure channel 300, resulting in a gap between the inner and outer sides of the negative pressure channel 300. The difference in sealing performance means that during later use, when the three-way connector is subjected to external impact, causing seal damage at the joint, the difference in resistance to seal damage between the inner and outer sides of the negative pressure channel 300 will likely result in seal damage occurring on the inner side of the negative pressure channel 300. If the aspirated material leaks at the joint, it will flow directly through the seal damage into the collection chamber 600 for collection. The cooperation between the collection chamber 600 and the joint structure prevents leakage of the aspirated material, reducing the risk of leakage and improving the safety and convenience of endoscope use. Furthermore, the entire three-way connector fully utilizes the space between the negative pressure channel 300 and the instrument channel 400. The addition of a storage chamber 600 to accommodate the space results in a rational structural design that is conducive to the miniaturization of the endoscope. On the other hand, when a seal is damaged at the connection point, the damaged area can easily induce the accumulation of aspirate, leading to blockage of the negative pressure channel 300 and affecting the normal operation of aspirate extraction. However, in this embodiment, based on the above structural design, when a seal is damaged inside the negative pressure channel 300, the storage chamber 600 connects to the negative pressure channel 300 through the gap created by the seal damage. When the negative pressure channel is working, since the negative pressure channel 300 is under negative pressure while the storage chamber 600 is under normal pressure, the gas in the storage chamber 600 will eventually break through the seal. Impurities or aspirated material in the gap are pushed into the negative pressure channel 300 to prevent them from remaining in the damaged gap. Similarly, after the suction work is completed, when the negative pressure channel 300 is restored to normal pressure, it will be restored to normal pressure before the collection chamber 600. This creates a pressure difference between the collection chamber 600 and the negative pressure channel 300 at the joint for a certain period of time. Driven by this pressure difference, impurities or aspirated material in the damaged gap can be sucked into the collection chamber 600 for collection, preventing them from remaining in the damaged gap. This avoids the situation where aspirated material accumulates due to seal damage, blocking the negative pressure channel, and improves the safety and convenience of endoscope use.

[0047] In some embodiments, an annular protrusion 210 and a negative pressure connector 310 may be provided on the splicing surface of the first half 100, the negative pressure channel 300 passes through the negative pressure connector 310, and the storage chamber 600 and the negative pressure connector 310 are located inside the annular protrusion 210; a first clearance groove 110 is provided on the splicing surface of the second half 200, the first clearance groove 110 is used to avoid the annular protrusion 210 and the negative pressure connector 310.

[0048] To further control the location of seal failure, such as Figure 3 , Figure 5 and Figure 9 As shown, the wall thickness of the negative pressure channel 300 on the side closer to the storage chamber 600 is less than that on the side farther from the storage chamber 600. Different wall thicknesses correspond to different resistance to seal failure. The greater the wall thickness, the stronger the resistance to seal failure. Consequently, when seal failure is possible, the location of seal failure is more likely to occur on the side of the negative pressure channel 300 closer to the storage chamber 600. This enables guidance and control of the location of seal failure, ensuring that the storage chamber 600 effectively implements preventive measures against leakage of the aspirated material, reducing the risk of leakage, and improving the safety and convenience of using the endoscope.

[0049] Specifically, such as Figure 5 , Figure 8 and Figure 9 As shown, the wall of the negative pressure connector 310 away from the storage chamber 600 overlaps with the annular protrusion 210. The overlapping annular protrusion 210 reinforces the outer side of the negative pressure connector 310, improving the resistance to seal failure on the outer side of the negative pressure channel 300 at the splice point. This results in a significantly stronger resistance to seal failure on the outer side of the negative pressure channel 300 at the splice point than on the inner side, guiding and controlling the location of seal failure. This further ensures the effective implementation of the storage chamber 600's prevention and treatment of aspirated material leakage, reducing the risk of leakage and improving the safety and convenience of endoscope use. It should be noted that the negative pressure connector 310 can be configured with the same wall thickness on different radial directions within the same circumference, or with a greater wall thickness on the outer side of the negative pressure connector 310 than on the inner side within the same circumference. This differentiates the resistance to seal failure on the inner and outer sides of the negative pressure connector 310, guiding the seal failure to occur on the inner side of the negative pressure connector 310 in the event of potential seal failure.

[0050] When the instrument channel 400 is simultaneously arranged on the first half 100 and the second half 200, such as Figure 8 and Figure 9 As shown, an instrument connector 410 is provided on the splicing surface of the second half 200, and the instrument channel 400 passes through the instrument connector 410, as shown. Figure 6 and Figure 7 As shown, a second clearance groove 420 is provided on the splicing surface of the first half 100, and the second clearance groove 420 is used to avoid the instrument joint 410.

[0051] In some embodiments, when the instrument channel 400 is simultaneously arranged on the first half 100 and the second half 200, an instrument connector 410 can be provided on the splicing surface of the first half 100, through which the instrument channel 400 passes. A second clearance groove 420 is provided on the splicing surface of the second half 200, which is used to avoid the instrument connector 410.

[0052] To improve the stable connection between the first half 100 and the second half 200, such as Figure 3 , Figure 5 and Figure 8 As shown, a cavity 211 can be provided between the instrument connector 410 on the side away from the storage chamber 600 and the annular protrusion 210. The cavity 211 is used to bond the first half 100 and the second half 200. When splicing the first half 100 and the second half 200, adhesive can be applied to the annular protrusion 210 and the splicing surface outside the annular protrusion 210, and then adhesive can be injected into the cavity 211 to increase the bonding area and amount of adhesive injected into the first half 100 and the second half 200, ensuring a stable connection between the first half 100 and the second half 200 and improving the resistance to seal damage of the tee connector.

[0053] To improve the sealing performance of the negative pressure channel 300 after splicing, the axis of the negative pressure channel 300 can be set to be parallel to the axis of the annular protrusion 210. The annular protrusion 210 and the first clearance groove 110 are used to achieve pre-positioning, while ensuring that the negative pressure channel 300 on the first half 100 and the negative pressure channel 300 on the second half 200 are on the same axis, making it less prone to deviation. As a result, the sealing performance of the negative pressure channel 300 is better after splicing.

[0054] In some embodiments, the outer wall surface of the negative pressure connector 310 can be set to be parallel to the axis of the negative pressure connector 310. By utilizing the limiting fit between the outer wall of the negative pressure connector 310 and the corresponding part of the first relief groove 110, the docking deviation between the negative pressure channels 300 during the splicing process can be further reduced, thereby improving the sealing performance and structural strength of the negative pressure channels 300 after splicing.

[0055] To facilitate the assembly of the first half 100 and the second half 200 into a complete tee connector, the outer wall surface of the instrument connector 410 away from the storage chamber 600 can be parallel to the axis of the negative pressure channel 300. By utilizing the limiting fit between the outer wall surface of the instrument connector 410 away from the storage chamber 600 and the corresponding inner wall of the second clearance groove 420, precise docking of the first half 100 and the second half 200 can be achieved, further reducing deviations during the docking process of the negative pressure channel 300. Alternatively, the outer wall surface of the instrument connector 410 near the storage chamber 600 can be set to be parallel to the axis of the instrument channel 400, increasing the sealing area inside the instrument connector 410. The sealing performance of the inner and outer sides of the instrument connector 410 is similar, thereby improving the sealing performance of the instrument connector 410. In addition, adhesive can be applied to the inner and outer walls of the instrument connector 410, which can not only enhance the bonding stability of the three-way connector and the sealing performance of the instrument channel 400 in conjunction with the adhesive injection in the cavity 211, but also further control the resistance to seal failure on the inner side of the negative pressure connector 310 to be at its weakest position. In the event of possible seal failure, the seal failure is guided to occur precisely on the inner side of the negative pressure connector 310, ensuring that the storage chamber 600 effectively implements the prevention and treatment of aspirate leakage, reducing the risk of aspirate leakage, and improving the safety and convenience of endoscope use.

[0056] In some embodiments, the storage chamber 600 can be directly connected to the negative pressure channel 300. By utilizing the pressure difference between the storage chamber 600 and the negative pressure channel 300 during operation, the risk of induced accumulation of absorbent material at the connection point can be reduced, ensuring the normal operation of the equipment.

[0057] Specifically, in order to connect the storage chamber 600 with the negative pressure channel 300, a connecting groove can be provided on the splicing surface of the first half 100. The connecting groove is used to connect the storage chamber 600 with the negative pressure channel 300, which can reduce the risk of induced accumulation of absorbent material at the joint and reduce the resistance to seal damage on the inner side of the negative pressure connector 310. In the event of possible seal damage, it can achieve precise control over the location of seal damage.

[0058] In some embodiments, to enable communication between the storage chamber 600 and the negative pressure channel 300, a communication groove can be provided on the splicing surface of the second half 200. The communication groove is used to enable communication between the storage chamber 600 and the negative pressure channel 300, which can reduce the risk of induced accumulation of absorbent material at the connection point and reduce the resistance to seal damage on the inner side of the negative pressure connector 310. In the event of possible seal damage, it can achieve precise control over the location of seal damage.

[0059] In some embodiments, to enable communication between the storage chamber 600 and the negative pressure channel 300, a gap can be provided between the side of the negative pressure connector 310 near the storage chamber 600 and the inner wall of the first clearance groove 110. The gap is used to enable communication between the storage chamber 600 and the negative pressure channel 300, which can reduce the risk of induced accumulation of absorbent material at the docking point and reduce the resistance to seal damage on the inner side of the negative pressure connector 310. In the event of possible seal damage, precise control can be achieved over the location of the seal damage.

[0060] Example 2:

[0061] This application provides a handle, including a housing and a three-way connector as in Embodiment 1, wherein the three-way connector is located at the distal end of the housing.

[0062] Example 3:

[0063] This application provides an endoscope, such as... Figure 10 As shown, the endoscope includes the three-way connector in Embodiment 1 or the handle 10 in Embodiment 2. The endoscope also includes an insertion part 20, and the distal end of the docking channel 500 is used to connect with the proximal end of the insertion part 20.

[0064] When the treatment device is inserted, it passes through the device channel 400 and the docking channel 500 in sequence, enters the proximal end of the insertion part 20, and exits from the distal end of the insertion part 20, thereby treating human tissue. When aspirating the aspirate from the body cavity, the aspirate is aspirated at the distal end of the insertion part 20, and then passes through the proximal end of the insertion part 20, the docking channel, and the negative pressure channel in sequence to achieve the aspiration of the aspirate.

[0065] It should be noted that the endoscopes in the embodiments of this application can be bronchoscopes, pyeloscopes, esophagoscopes, gastroscopes, colonoscopes, otoscopes, rhinoscopes, oral endoscopes, laryngoscopes, colposcopes, laparoscopes, arthroscopes, etc. The embodiments of this application do not specifically limit the types of endoscopes.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A splicing type tee connector, characterized in that, The device includes a negative pressure channel (300), an instrument channel (400), a docking channel (500), and a storage chamber (600). The negative pressure channel (300) and the instrument channel (400) are respectively connected to the docking channel (500). The storage chamber (600) is located between the negative pressure channel (300) and the instrument channel (400). The three-way connector also includes a first half (100) and a second half (200). The negative pressure channel (300) is arranged on the first half (100) and the second half (200). The instrument channel (400) is at least partially arranged on the second half (200). The docking channel (500) is arranged at the far end of the second half (200). The storage chamber (600) is arranged on the first half (100) and the second half (200). An annular protrusion (210) and a negative pressure connector (310) are provided on one of the splicing surfaces of the first half (100) and the second half (200), respectively. The negative pressure channel (300) passes through the negative pressure connector (310), and the storage chamber (600) and the negative pressure connector (310) are located inside the annular protrusion (210). A first clearance groove is provided on the other of the splicing surfaces of the first half (100) and the second half (200). 110), the first clearance groove (110) is used to avoid the annular protrusion (210) and the negative pressure connector (310); the annular protrusion (210) can cooperate with the inner wall of the first clearance groove (110) to form a stepped sealing surface on the outside of the negative pressure channel (300). The inner side of the negative pressure channel (300) lacks a stepped sealing surface compared with the outer side of the negative pressure channel (300), resulting in a sealing difference between the inner and outer sides of the negative pressure channel (300).

2. The tee connector as described in claim 1, characterized in that, At the junction of the first half (100) and the second half (200), the wall thickness of the negative pressure channel (300) on the side closer to the storage chamber (600) is less than the wall thickness of the negative pressure channel (300) on the side farther from the storage chamber (600).

3. The tee connector as described in claim 2, characterized in that, The negative pressure connector (310) is located on the side wall away from the storage chamber (600) and coincides with the annular protrusion (210).

4. The tee connector as described in any one of claims 1 to 3, characterized in that, An instrument connector (410) is provided on one of the splicing surfaces of the first half (100) and the second half (200), and the instrument channel (400) passes through the instrument connector (410). A second clearance groove (420) is provided on the other of the splicing surfaces of the first half (100) and the second half (200), and the second clearance groove (420) is used to avoid the instrument connector (410).

5. The tee connector as described in claim 4, characterized in that, A cavity (211) is provided between the side of the instrument connector (410) away from the storage chamber (600) and the annular protrusion (210), the cavity (211) being used to bond the first half (100) and the second half (200).

6. The tee connector as described in claim 4, characterized in that, The axis of the negative pressure channel (300) is parallel to the axis of the annular protrusion (210); And / or, The outer wall of the instrument connector (410) away from the storage chamber (600) is parallel to the axis of the negative pressure channel (300), and the outer wall of the instrument connector (410) near the storage chamber (600) is parallel to the axis of the instrument channel (400).

7. The tee connector as described in claim 4, characterized in that, The storage chamber (600) is connected to the negative pressure channel (300).

8. The tee connector as described in claim 7, characterized in that, A connecting groove is provided on the splicing surface of the first half (100) or the splicing surface of the second half (200), the connecting groove being used to connect the storage chamber (600) with the negative pressure channel (300); or, The negative pressure connector (310) has a gap between the side of the storage chamber (600) and the inner wall of the first clearance groove (110), and the gap is used to enable the storage chamber (600) to communicate with the negative pressure channel (300).

9. A handle (10), characterized in that, It includes a housing and a tee connector as described in any one of claims 1 to 8, wherein the tee connector is located at the distal end of the housing.

10. An endoscope, characterized in that, The endoscope includes a three-way connector as described in any one of claims 1 to 8 or a handle (10) as described in claim 9, and also includes an insertion part (20), the distal end of the docking channel (500) being used to connect with the proximal end of the insertion part (20).

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