A tee connector and endoscope

Abstract

The application provides a tee connector and an endoscope, comprising a base body, a negative pressure channel and an instrument channel are arranged at the proximal end of the base body, a docking channel is arranged at the distal end of the base body, the instrument channel comprises an insertion section, a first arc-shaped bending section and a second arc-shaped bending section which are sequentially arranged from the proximal end to the distal end, the opening direction of the first arc-shaped bending section is towards the negative pressure channel, the opening direction of the second arc-shaped bending section is away from the negative pressure channel, and the distal end of the second arc-shaped bending section is in communication with the negative pressure channel. The application performs twice mirror image rotation of the treatment instrument through the instrument channel, so that the treatment instrument can enter the negative pressure channel based on a small entering angle, and correspondingly, the treatment instrument can also enter the docking channel based on a small entering angle for the coaxially arranged negative pressure channel and docking channel, so that the number of bending deformations of the treatment instrument in the docking channel and the insertion section is reduced, and the loading resistance and loading difficulty of the treatment instrument are reduced.

Description

Technical Field

[0001] This invention relates to the field of endoscope technology, and in particular to a three-way connector and an 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 includes a negative pressure channel, an instrument channel, and a docking channel that communicates with the insertion part. This allows for the extraction of fluid in the body cavity through the negative pressure channel and the insertion part, and the insertion of instruments through the instrument channel and the insertion part to sample or deliver therapeutic substances to human tissue.

[0003] In the process of developing this invention, the applicant discovered that when inserting the treatment device through the device channel, there is a large resistance to the insertion of the treatment device, which affects the normal use of the treatment device. Summary of the Invention

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

[0005] This application provides a three-way connector for an endoscope, comprising a base, wherein a negative pressure channel and an instrument channel are provided at the proximal end of the base, and a docking channel is provided at the distal end of the base. The distal end of the docking channel is used to connect with the insertion part of the endoscope. The proximal end of the negative pressure channel is used to connect with a negative pressure source, and the distal end of the negative pressure channel communicates with the proximal end of the docking channel. The instrument channel includes an insertion section, a first arc-shaped bending section and a second arc-shaped bending section arranged sequentially from the proximal end to the distal end. The proximal port of the insertion section is used to insert a treatment instrument. The angle between the axis of the insertion section and the axis of the negative pressure channel is an acute angle. The opening direction of the first arc-shaped bending section faces the negative pressure channel, and the opening direction of the second arc-shaped bending section is away from the negative pressure channel. The distal end of the second arc-shaped bending section communicates with the negative pressure channel, and the distal end of the second arc-shaped bending section is close to the proximal end of the docking channel.

[0006] Furthermore, the circle corresponding to the axis of the second arc-shaped curved segment is tangent to the axis of the docking channel.

[0007] Furthermore, the negative pressure channel and the docking channel are coaxially arranged.

[0008] Furthermore, the circle corresponding to the axis of the first arc-shaped curved segment is tangent to the circle corresponding to the axis of the second arc-shaped curved segment;

[0009] And / or, the axis of the inserted segment is tangent to the circle corresponding to the axis of the first arc-shaped curved segment.

[0010] Furthermore, the arc of the first arc-shaped bending segment is smaller than the arc of the second arc-shaped bending segment;

[0011] And / or, the diameter of the first arc-shaped curved segment is smaller than the diameter of the second arc-shaped curved segment.

[0012] Furthermore, the angle between the axis of the insertion section and the axis of the negative pressure channel is 30° to 50°.

[0013] And / or, the diameter of the first arc-shaped curved segment is 1 / 2 of the diameter of the second arc-shaped curved segment.

[0014] Furthermore, a transition channel is also provided in the matrix, and the distal end of the negative pressure channel is connected to the proximal end of the docking channel through the transition channel. The transition channel is used to realize a smooth transition between the negative pressure channel and the docking channel.

[0015] Furthermore, the curvature of the second arc-shaped curved section on the side closer to the negative pressure channel is greater than the curvature of the second arc-shaped curved section on the side farther from the negative pressure channel.

[0016] Furthermore, the inner wall of the second arc-shaped curved section near the negative pressure channel corresponds to the circle passing through the inner wall of the transition channel.

[0017] A second aspect of this application provides an endoscope including a handle, an insertion portion, and the aforementioned three-way connector, wherein the three-way connector is disposed at the distal end of the handle, and the distal end of the mating channel is connected to the proximal end of the insertion portion.

[0018] Compared with the prior art, the present invention has at least the following technical effects:

[0019] This invention performs two mirror rotations of the treatment instrument through the instrument channel, allowing the treatment instrument to enter the negative pressure channel at a small entry angle. Correspondingly, for the coaxially arranged negative pressure channel and docking channel, the treatment instrument can also enter the docking channel at a small entry angle, thereby reducing the number of times the treatment instrument bends and deforms within the docking channel and insertion part, reducing the resistance and difficulty of installation, and increasing the convenience and safety of endoscope use. Attached Figure Description

[0020] 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.

[0021] Figure 1 This is a schematic diagram of the structure of the three-way connector of the present invention;

[0022] Figure 2 This is a side view of the three-way connector of the present invention;

[0023] Figure 3 yes Figure 2 Sectional view along the AA direction (indicating the channel axis);

[0024] Figure 4 This is a schematic diagram of the connection of the internal channel (the circle indicating the axis of the instrument channel) of the three-way connector of the present invention;

[0025] Figure 5 This is a schematic diagram of the connection of the internal channel (indicating the insertion path of the treatment device) of the three-way connector of the present invention;

[0026] Figure 6 This is a connection diagram of the internal channels of an existing tee connector (indicating the insertion path of the treatment device);

[0027] Figure 7 yes Figure 6 A magnified view of a section at point D;

[0028] Figure 8 This is a schematic diagram of the structure of the endoscope of the present invention;

[0029] In the picture,

[0030] 10. Substrate; 110. Negative pressure channel; 120. Instrument channel; 121. Insertion section; 122. First arc-shaped bending section; 123. Second arc-shaped bending section; 130. Docking channel; 140. Transition channel; 20. Handle; 30. Insertion part. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] As one of the important medical instruments in modern surgery, the endoscope consists of 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 includes a negative pressure channel, an instrument channel, and a docking channel that connects to the insertion section. 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 so that the fluid in the body cavity can be extracted through the negative pressure channel and the insertion section. 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, and then the insertion section can reach the target location in the body cavity to sample human tissue or deliver therapeutic substances.

[0037] In existing technologies, to avoid blockage during negative pressure aspiration, the negative pressure channel and the docking channel are generally coaxially arranged. To facilitate the insertion of the treatment instrument into the instrument channel, it is necessary not only to control the extension direction of the proximal end of the instrument channel but also to maintain a certain angle between the instrument channel and the negative pressure channel. This ensures that the proximal end of the instrument channel has ample and reasonable operating space, preventing interference from the human body or the endoscope handle during insertion. On the other hand, when inserting the treatment instrument through the instrument channel, if... Figure 6 and Figure 7 As shown, because the existing instrument channel 120 is connected to the docking channel 130 via the negative pressure channel 110, after the treatment instrument enters the instrument channel 120, there is an initial angle between the treatment instrument and the negative pressure channel 110. When the treatment instrument then enters the negative pressure channel 110 from the instrument channel 120, it will inevitably collide with the inner wall of the negative pressure channel 110, resulting in a bend. The direction of the treatment instrument's movement is mirrored, and after this bend, the initial angle between the treatment instrument and the negative pressure channel 110 is maintained. Correspondingly, during subsequent insertion, the treatment instrument will use the initial angle as the entry angle β and be inserted obliquely into the docking channel 130. The larger the entry angle β, the more times the treatment instrument bends against the inner wall of the channel per unit length, causing the treatment instrument to undergo multiple bending deformations within the docking channel 130 and the insertion portion. This increases the resistance and difficulty of inserting the treatment instrument, affecting its normal use. To solve the problem of the three-way connector's impact on the insertion of the treatment instrument, this application provides a three-way connector and endoscope that can reduce the difficulty of inserting the treatment instrument. The specific structure is shown in the following embodiment.

[0038] Example 1:

[0039] This application provides a three-way connector for an endoscope, such as... Figures 1-3As shown, the device includes a substrate 10. The proximal end of the substrate 10 is provided with a negative pressure channel 110 and an instrument channel 120, and the distal end of the substrate 10 is provided with a docking channel 130. The distal end of the docking channel 130 is used to connect with the insertion part of an endoscope. The proximal end of the negative pressure channel 110 is used to connect with a negative pressure source, and the distal end of the negative pressure channel 110 communicates with the proximal end of the docking channel 130. The instrument channel 120 includes an insertion section 121, a first arc-shaped bending section 122, and [other components] arranged sequentially from the proximal end to the distal end. The second arc-shaped curved section 123, the proximal port of the insertion section 121 is used to insert the treatment device, the angle between the axis of the insertion section 121 and the axis of the negative pressure channel 110 is an acute angle, the opening direction of the first arc-shaped curved section 122 faces the negative pressure channel 110, the opening direction of the second arc-shaped curved section 123 is away from the negative pressure channel 110, the distal end of the second arc-shaped curved section 123 is connected to the negative pressure channel 110, and the distal end of the second arc-shaped curved section 123 is close to the proximal end of the docking channel 130.

[0040] When it is necessary to insert the treatment instrument into the insertion part of the endoscope during use, such as Figure 5As shown, the treatment device enters through the insertion section 121 port of the device channel 120. During entry, the treatment device is controlled to adhere to the inner wall of the insertion section 121 port near the negative pressure channel 110. The treatment device, adhering to the inner wall of the insertion section 121 port and facing the first arc-shaped curved section 122, enters the first arc-shaped curved section 122. This ensures that the angle between the direction of the treatment device's movement and the negative pressure channel 110 is kept as small as possible (first angle) in the initial entry state, and avoids bending deformation of the treatment device in the insertion section 121. The treatment device abuts against the inner wall of the first arc-shaped curved section 122 at a relatively large contact angle. Due to the abutment action of the inner wall of the first arc-shaped curved section 122, the treatment device undergoes a large-angle bend at the contact point with the inner wall of the first arc-shaped curved section 122, increasing the angle between the direction of the treatment device's movement and the negative pressure channel 110 after the first bend (second angle). Then, the treatment device continues to advance into the second arc-shaped curved section 122. Because the bending directions of the second arc-shaped bending section 123 and the first arc-shaped bending section 122 are opposite, after the treatment instrument enters the second arc-shaped bending section 123, it abuts against the inner wall of the second arc-shaped bending section 123 near the negative pressure channel 110 and undergoes a secondary bend, changing the forward direction of the treatment instrument. This reduces the angle between the forward direction of the treatment instrument and the negative pressure channel after the secondary bend (the third angle, which is much smaller than the first angle), allowing the treatment instrument to enter the negative pressure channel 110 with a small entry angle (the third angle). Correspondingly, for the coaxially arranged negative pressure channel 110 and docking channel 130, the treatment instrument can also enter the docking channel 130 with a small entry angle (the third angle), thereby reducing the number of times the treatment instrument undergoes bending deformation in the docking channel 130 and / or the insertion part, reducing the resistance and difficulty of inserting the treatment instrument, and increasing the convenience and safety of using the endoscope.

[0041] To further reduce the number of bending deformations of the treatment device within the docking channel 130 and / or insertion section, such as Figure 4 As shown, the circle corresponding to the axis of the second arc-shaped bending section 123 can be set to be tangent to the axis of the docking channel 130. When the second arc-shaped bending section 123 is tangent to the docking channel 130, the instrument can be guided by the second arc-shaped bending section 123 and enter the negative pressure channel 110 in a state that is almost parallel or completely parallel to the axis of the negative pressure channel 110. Even after entering, the instrument can move forward coaxially with the negative pressure channel 110. As a result, the instrument will not directly collide with the docking channel 130 and the insertion part, thereby further reducing the insertion resistance and difficulty of the instrument and improving the ease of use of the endoscope.

[0042] In some embodiments, the circle corresponding to the inner wall of the second arc-shaped curved section 123 near the negative pressure channel 110 can be set to be tangent to the axis of the docking channel 130, thereby reducing the number of times the treatment device undergoes bending deformation in the docking channel 130 and / or the insertion part, and reducing the installation difficulty of the treatment device.

[0043] In some embodiments, the inner wall of the second arc-shaped curved section 123 on the side away from the negative pressure channel 110 may be set to be tangent to the axis of the docking channel 130, thereby reducing the number of times the treatment device undergoes bending deformation in the docking channel 130 and / or the insertion part, and reducing the installation difficulty of the treatment device.

[0044] Specifically, the negative pressure channel 110 and the docking channel 130 are coaxially arranged to improve the stability and safety of the negative pressure suction operation and to prevent the sample from getting stuck in the three-way connector.

[0045] To reduce the resistance to the passage of the treatment instruments within the instrument channel 120, such as Figure 4 As shown, the circle corresponding to the axis of the first arc-shaped bending segment 122 can be set to be tangent to the circle corresponding to the axis of the second arc-shaped bending segment 123. Based on this structure, after the treatment device bends once by contacting the inner wall of the first arc-shaped bending segment 122, under the guidance of the first arc-shaped bending segment 122, the treatment device is prompted to quickly enter the second arc-shaped bending segment 123 to undergo a second bending deformation, and the second bending deformation is mainly to mirror the forward direction of the treatment device.

[0046] To reduce the insertion resistance of the treatment device, the axis of the insertion section 121 can be set to be tangent to the circle corresponding to the axis of the first arc-shaped bending section 122. Based on this structure, during the process of the treatment device entering from the insertion section 121 port of the device channel 120, the treatment device is controlled to be close to the inner wall of the side of the insertion section 121 port near the negative pressure channel 110. The treatment device is allowed to enter the first arc-shaped bending section 122 while being close to the inner wall of the insertion section 121 port and facing the first arc-shaped bending section 122. This avoids bending deformation of the treatment device in the insertion section 121 and keeps the angle between the direction of the treatment device's advance and the negative pressure channel 110 as small as possible in the initial entry state. This reduces the entry angle of the treatment device into the docking channel 130 and the number of times the treatment device bends and deforms in the docking channel 130 and / or the insertion part, thereby reducing the insertion resistance and difficulty of the treatment device.

[0047] To further reduce the insertion resistance of the treatment device, the curvature of the first arc-shaped bending segment 122 can be set to be smaller than that of the second arc-shaped bending segment 123. This extends the length of the second arc-shaped bending segment 123 within the limited space of the three-way connector, allowing it to guide the treatment device for a longer period of time and minimizing the entry angle of the treatment device when it enters the negative pressure channel 110. Furthermore, the diameter of the first arc-shaped bending segment 122 is smaller than that of the second arc-shaped bending segment 123. Within the limited space of the three-way connector, the length of the first arc-shaped bending segment 122 is reduced. While ensuring that the first arc-shaped bending segment 122 achieves a single bending action on the treatment device, the length of the second arc-shaped bending segment 123 is extended as much as possible. This further increases the guiding length and guiding time of the second arc-shaped bending segment 123 for the bending deformation of the treatment device, ensuring the stability of the insertion direction of the treatment device.

[0048] In some embodiments, the arc of the first arc-shaped bending segment 122 is preferably 25° to 35°, and the arc of the second arc-shaped bending segment 123 is preferably 45° to 55°; the ratio of the diameter of the first arc-shaped bending segment 122 to the diameter of the second arc-shaped bending segment 123 is 1:1.8 to 2.2; in this embodiment, the diameter of the first arc-shaped bending segment 122 is preferably half the diameter of the second arc-shaped bending segment 123.

[0049] To ensure that the proximal port of the instrument channel 120 has ample and reasonable operating space, and that the human body or endoscope handle does not interfere with the insertion process when the instrument is inserted, the angle between the axis of the insertion section 121 and the axis of the negative pressure channel 110 can be set to 30° to 50°, thereby improving the ease of insertion of the instrument and reducing the difficulty of insertion.

[0050] To reduce the impact of the diameter change between the docking channel 130 and the negative pressure channel 110 on the loading process of the treatment device, such as Figures 3-5 As shown, a transition channel 140 may also be provided in the substrate 10. The distal end of the negative pressure channel 110 is connected to the proximal end of the docking channel 130 through the transition channel 140. The transition channel 140 is used to realize a smooth transition between the negative pressure channel 110 and the docking channel 130. The transition channel 140 is used to guide the treatment instrument from the negative pressure channel 110 into the docking channel 130 quickly.

[0051] To prevent the aspirated material from being drawn into the instrument channel 120 during aspiration, the curvature of the second arc-shaped curved section 123 on the side closer to the negative pressure channel 110 can be greater than the curvature on the side farther from the negative pressure channel 110. This reduces the size of the distal end of the second arc-shaped curved section 123, which not only reduces the probability of the aspirated material entering the instrument channel 120, but also gradually guides the treatment instrument to gradually align with the axis of the second arc-shaped curved section 123 as it passes through it. In particular, when the circle corresponding to the axis of the second arc-shaped curved section 123 is tangent to the axis of the negative pressure channel 110, the treatment instrument is guided to align with the axis of the negative pressure channel 110 when it exits the second arc-shaped curved section 123. This ensures that the treatment instrument can pass through the negative pressure channel 110 and the docking channel 130 without obstruction and be quickly and safely inserted into the insertion part.

[0052] To improve the ease of insertion of the treatment device by the operator, the inner wall of the second arc-shaped curved section 123 near the negative pressure channel 110 can be aligned with the inner wall of the transition channel 140. Even if the operator makes a mistake during the insertion process, increasing the entry angle of the treatment device into the negative pressure channel 110, the inner wall of the transition channel 140 can be used to guide the treatment device, so that the treatment device can quickly and stably enter the docking channel 130 and be inserted into the insertion part.

[0053] Example 2:

[0054] This application provides an embodiment of an endoscope, such as Figure 8 As shown, it includes a handle 20, an insertion part 30, and a three-way connector as in Embodiment 1. The three-way connector is located at the distal end of the handle 20, and the distal end of the mating channel 130 is connected to the proximal end of the insertion part 30.

[0055] When the treatment device is inserted, it passes sequentially through the insertion section 121, the first arc-shaped bend section 122, and the second arc-shaped bend section 123 of the device channel 120, and enters the proximal end of the insertion part 30 through the docking channel 130, and exits from the distal end of the insertion part 30, thereby treating human tissue; when aspirating the aspirate from the body cavity, the aspirate is aspirated at the distal end of the insertion part 30, and then passes sequentially through the proximal end of the insertion part 30, the docking channel 130, and the negative pressure channel 110 to achieve the aspiration of the aspirate.

[0056] 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.

[0057] 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 three-way connector for an endoscope, characterized in that, Includes a substrate (10), the proximal end of which is provided with a negative pressure channel (110) and an instrument channel (120), and the distal end of which is provided with a docking channel (130). The distal end of the docking channel (130) is used to connect with the insertion part (30) of an endoscope. The proximal end of the negative pressure channel (110) is used to connect with a negative pressure source, and the distal end of the negative pressure channel (110) is connected to the proximal end of the docking channel (130). The instrument channel (120) includes an insertion section (121), a first arc-shaped bending section (122), and a second arc-shaped bending section (123) arranged sequentially from the proximal end to the distal end. The proximal port of segment (121) is used to insert a treatment device. The angle between the axis of insertion segment (121) and the axis of negative pressure channel (110) is an acute angle. The opening direction of the first arc-shaped curved segment (122) faces the negative pressure channel (110), and the opening direction of the second arc-shaped curved segment (123) is away from the negative pressure channel (110). The distal end of the second arc-shaped curved segment (123) is connected to the negative pressure channel (110), and the distal end of the second arc-shaped curved segment (123) is close to the proximal end of docking channel (130). The circle corresponding to the axis of the second arc-shaped curved segment (123) is tangent to the axis of docking channel (130). The circle corresponding to the axis of the first arc-shaped curved segment (122) is tangent to the circle corresponding to the axis of the second arc-shaped curved segment (123), and / or the axis of the insertion segment (121) is tangent to the circle corresponding to the axis of the first arc-shaped curved segment (122).

2. The tee connector as described in claim 1, characterized in that, The negative pressure channel (110) and the docking channel (130) are coaxially arranged.

3. The tee connector as described in claim 1, characterized in that, The arc of the first arc-shaped curved segment (122) is smaller than the arc of the second arc-shaped curved segment (123); And / or, the diameter of the first arc-shaped curved segment (122) is smaller than the diameter of the second arc-shaped curved segment (123).

4. The tee connector as described in claim 3, characterized in that, The angle between the axis of the insertion section (121) and the axis of the negative pressure channel (110) is 30°~50°; And / or, the diameter of the first arc-shaped curved segment (122) is 1 / 2 of the diameter of the second arc-shaped curved segment (123).

5. The tee connector as described in any one of claims 1 to 4, characterized in that, The substrate (10) is also provided with a transition channel (140). The far end of the negative pressure channel (110) is connected to the proximal end of the docking channel (130) through the transition channel (140). The transition channel (140) is used to realize a smooth transition between the negative pressure channel (110) and the docking channel (130).

6. The tee connector as described in any one of claims 1 to 4, characterized in that, The curvature of the second arc-shaped curved section (123) on the side closer to the negative pressure channel (110) is greater than the curvature of the second arc-shaped curved section (123) on the side farther from the negative pressure channel (110).

7. The tee connector as described in claim 6, characterized in that, The inner wall of the second arc-shaped curved section (123) near the negative pressure channel (110) corresponds to the inner wall of the transition channel (140).

8. An endoscope, characterized in that, It includes a handle (20), an insertion part (30), and a three-way connector as described in any one of claims 1 to 7, wherein the three-way connector is disposed at the distal end of the handle (20), and the distal end of the mating channel (130) is connected to the proximal end of the insertion part (30).

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