Three-way connector, handle and endoscope

Abstract

The utility model relates to the technical field of endoscopes, in particular to a three-way connector, a handle and an endoscope, the three-way connector comprises a base body, a negative pressure channel and an instrument channel are arranged at the near end of the base body, a butt joint channel is arranged at the far end of the base body, the negative pressure channel is of an arc-shaped structure, the instrument channel is communicated with the negative pressure channel, and the butt joint channel is communicated with the instrument channel. The negative pressure channel is communicated with the butt joint channel, and the far end of the butt joint channel is used for being connected with an endoscope insertion part. By reducing the included angle between the treatment instrument and the inner wall of the negative pressure channel, the abutting pressure between the treatment instrument and the inner wall of the negative pressure channel is reduced, the advancing resistance of the inner wall of the negative pressure channel to the treatment instrument is reduced, and the passing performance of the treatment instrument entering the negative pressure channel from the instrument channel is improved; the loading resistance and the loading difficulty of the treatment instrument are reduced, the integrity and the safety of the treatment instrument passing through the three-way connector are ensured, and the use convenience of the endoscope is improved.

Description

Technical Field

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

[0002] An endoscope is a medical device used in modern surgery. It 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. The camera module at the distal end of the insertion part acquires images of the human body to help doctors 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 part. The negative pressure channel mainly works with the insertion part to aspirate fluid from body cavities. The instrument channel mainly works with the insertion part to insert instruments to sample human tissue or deliver therapeutic substances.

[0003] However, the applicant discovered during the development of this invention that when inserting the treatment device through the device channel, it is inconvenient to install the treatment device, which affects the normal use of the treatment device. Utility Model Content

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

[0005] The first aspect of 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 negative pressure channel has an arc-shaped structure, the proximal port of the instrument channel is used for inserting a treatment instrument, the distal end of the instrument channel is connected to the proximal end of the negative pressure channel, the instrument channel is located on the side away from the arc-shaped opening of the negative pressure channel, the proximal end of the negative pressure channel is used for connecting to a negative pressure source, the distal end of the negative pressure channel is connected to the proximal end of the docking channel, and the distal end of the docking channel is used for connecting to the endoscope insertion part.

[0006] Furthermore, the angle between the extension line of the far end port of the negative pressure channel and the axis of the docking channel is an acute angle, and the docking channel is located on the side away from the arc-shaped opening of the negative pressure channel.

[0007] Furthermore, the angle between the extension line of the far end port of the negative pressure channel and the axis of the docking channel is 15° to 25°.

[0008] Furthermore, the distal end of the negative pressure channel is connected to the proximal end of the docking channel via a transition channel.

[0009] Furthermore, the axial cross-section of the inner wall of the transition channel is an arc-shaped structure, and the curvature of the inner wall of the transition channel on the side closer to the instrument channel is smaller than the curvature of the inner wall of the transition channel on the side farther from the instrument channel.

[0010] Furthermore, the curvature of the inner wall of the transition channel on the side away from the instrument channel is 40° to 50°.

[0011] Furthermore, the distal port extension of the instrument channel passes through or is close to the transition channel.

[0012] Furthermore, the curvature of the negative pressure channel is 25° to 35°.

[0013] A second aspect of this application provides a handle, including a housing and the aforementioned tee connector, the tee connector being disposed at the distal end of the housing.

[0014] A third aspect of this application provides an endoscope including an insertion portion and the aforementioned handle, wherein the distal end of the docking channel is connected to the proximal end of the insertion portion.

[0015] Compared with the prior art, the present invention has at least the following technical effects:

[0016] When the treatment instrument passes through the instrument channel into the negative pressure channel, the negative pressure channel has an arc-shaped structure and its opening faces away from the instrument channel. This reduces the angle between the treatment instrument and the inner wall of the negative pressure channel, thereby reducing the contact pressure between the treatment instrument and the inner wall of the negative pressure channel. This reduces the forward resistance of the inner wall of the negative pressure channel to the treatment instrument, thereby improving the passage performance of the treatment instrument from the instrument channel into the negative pressure channel, reducing the resistance and difficulty of inserting the treatment instrument, ensuring the integrity and safety of the treatment instrument when passing through the three-way connector, and improving the ease of use of the endoscope. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a schematic diagram of the structure of the three-way connector of this utility model;

[0019] Figure 2 This is a side view of the T-connector of this utility model;

[0020] Figure 3 yes Figure 2 Sectional view along line AA;

[0021] Figure 4 This is a schematic diagram of the axis of the internal channel of the three-way connector of this utility model;

[0022] Figure 5 This is a schematic diagram of the insertion path of the treatment device of this utility model in the three-way connector;

[0023] Figure 6 This is a schematic diagram of another insertion path of the treatment device of this utility model in a three-way connector;

[0024] Figure 7 This is a schematic diagram of the structure of the endoscope of this utility model;

[0025] In the picture,

[0026] 10. Substrate; 100. Negative pressure channel; 200. Instrument channel; 300. Docking channel; 400. Transition channel; 20. Shell; 30. Insertion part; 40. Treatment instrument. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] 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," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0030] 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.

[0031] 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.

[0032] An endoscope is a medical device used in modern surgery, comprising an operating handle and an insertion section. The insertion section can be inserted into the human body through a body cavity or surgical incision. The user can adjust the posture of the distal active bending section of the insertion section by moving a lever on the operating handle, allowing the camera module at the distal end of the insertion section to acquire images of the internal tissues from different angles, helping doctors determine the location and structural characteristics of lesions within the patient's body. The operating handle is equipped with a three-way connector, which includes a negative pressure channel, an instrument channel, and a docking channel connecting to the insertion section. During use, when it is necessary to treat fluid accumulation in the body cavity, the user can connect the negative pressure source to the negative pressure channel to extract the fluid through the negative pressure channel and the insertion section. When it is necessary to sample human tissue or deliver therapeutic substances into the body, the user can insert the treatment instrument through the instrument channel, which then reaches the target location within the body cavity via the insertion section to sample human tissue or deliver therapeutic substances.

[0033] 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 endoscope handle during the insertion process. On the other hand, when the treatment instrument is inserted through the instrument channel, it will inevitably come into contact with the inner wall of the negative pressure channel when the instrument channel enters the negative pressure channel. The larger the angle between the instrument channel and the negative pressure channel, the greater the contact pressure on the inner wall of the negative pressure channel. Correspondingly, the forward frictional resistance of the negative pressure channel on the treatment instrument is also greater. This can easily cause the treatment instrument to bend prematurely before entering the docking channel, making it difficult for the treatment instrument to be properly inserted into the insertion part and affecting the normal use of the treatment instrument. To address the problem that three-way connectors are inconvenient for inserting surgical instruments, this application provides a three-way connector and endoscope that can reduce the resistance to inserting surgical instruments, as shown in the following embodiments.

[0034] Example 1:

[0035] This application provides a three-way connector for an endoscope, such as... Figures 1-3 As shown, the device includes a substrate 10. The proximal end of the substrate 10 is provided with a negative pressure channel 100 and an instrument channel 200, and the distal end of the substrate 10 is provided with a docking channel 300. The negative pressure channel 100 has an arc-shaped structure. The proximal port of the instrument channel 200 is used to insert a treatment instrument. The distal end of the instrument channel 200 is connected to the proximal end of the negative pressure channel 100. The instrument channel 200 is located on the side away from the arc-shaped opening of the negative pressure channel 100. The proximal end of the negative pressure channel 100 is used to connect to a negative pressure source. The distal end of the negative pressure channel 100 is connected to the proximal end of the docking channel 300. The distal end of the docking channel 300 is used to connect to the endoscope insertion part.

[0036] During use, when the instrument needs to be inserted into the insertion part of the endoscope, the instrument should be inserted through the proximal port of the instrument channel 200. During insertion, it is preferable to control the instrument to remain against the inner wall of the proximal port of the instrument channel 200, near the negative pressure channel 100. Figure 6As shown, the procedure aims to maintain a small angle between the instrument and the negative pressure channel 100 during insertion, and to prevent the instrument from bending within the instrument channel 200. When the instrument passes through the instrument channel 200 and enters the negative pressure channel 100, the arc-shaped structure of the negative pressure channel 100, with its opening facing away from the instrument channel 200, reduces the angle between the instrument and the inner wall of the negative pressure channel 100. This reduces the contact pressure between the instrument and the inner wall of the negative pressure channel 100, lowers the resistance to the instrument's movement, and improves the passage performance of the instrument from the instrument channel 200 into the negative pressure channel 100. It also reduces the insertion resistance and difficulty, ensures the integrity and safety of the instrument when passing through the three-way connector, and improves the ease of use of the endoscope.

[0037] In existing tee connectors, the inner diameter of the mating channel 300 is generally smaller than that of the negative pressure channel. This results in a transition surface at the port connection between the mating channel 300 and the negative pressure channel 100. This transition surface may obstruct the process of the treatment instrument entering the mating channel 300 from the negative pressure channel 100. To reduce the negative impact of the transition surface on the instrument insertion process, the angle between the extension line of the distal port of the negative pressure channel 100 and the axis of the mating channel 300 can be set to an acute angle. The mating channel 300 is located on the side away from the arc-shaped opening of the negative pressure channel 100. Based on this, the mating channel 300 is biased towards the instrument channel 200, allowing the mating channel 300 to more accurately correspond to the treatment instrument. Figure 5 As shown, after the treatment device undergoes a mirror reversal upon contact with the inner wall of the negative pressure channel 100, it can directly move towards the port of the docking channel 300, thereby accurately entering the docking channel 300, reducing or avoiding the negative impact of the transition surface on the installation process of the treatment device, and improving the ease of installation of the treatment device.

[0038] To reduce or avoid the negative impact of the transition on the loading process of the treatment device, the angle between the extension line of the far end of the negative pressure channel 100 and the axis of the docking channel 300 can be 15° to 25°.

[0039] In some embodiments, the angle between the extension line of the far end port of the negative pressure channel 100 and the axis of the docking channel 300 can be 19° to 21°, preferably 20°.

[0040] To achieve a smooth transition between the negative pressure channel 100 and the docking channel 300, such as Figures 3-6 As shown, the distal end of the negative pressure channel 100 can be connected to the proximal end of the docking channel 300 through the transition channel 400.

[0041] To further improve the passage performance of the treatment device from the negative pressure channel 100 to the docking channel 300, the axial cross-section of the inner wall of the transition channel 400 can be set as an arc-shaped structure, and the curvature of the inner wall of the transition channel 400 on the side closer to the device channel 200 is smaller than the curvature of the inner wall of the transition channel 400 on the side farther from the device channel 200. During the insertion of the treatment device, since the distal end of the device channel 200 is close to the docking channel 300, after the treatment device abuts against the inner wall of the negative pressure channel 100 during insertion, it is guided by the inner wall of the transition channel 400 on the side farther from the device channel 200 to the docking channel 300, so as to quickly insert the treatment device from the negative pressure channel 100 into the docking channel 300 and improve the passage performance of the three-way connector for the treatment device.

[0042] To facilitate the guidance of treatment instruments through the transition channel 400, the curvature of the inner wall of the transition channel 400 on the side away from the instrument channel 200 can be 40° to 50°.

[0043] In some embodiments, to facilitate the guidance of the treatment device by the transition channel 400, the extension line of the distal port of the device channel 200 can be brought close to the transition channel 400. After the treatment device is inserted and comes into contact with the inner wall of the negative pressure channel 100, it continues to advance and act on the inner wall of the transition channel 400. The treatment device is guided by the inner wall of the transition channel 400 away from the device channel 200 to the docking channel 300, so that the treatment device can be quickly inserted from the negative pressure channel 100 into the docking channel 300, thereby improving the passage performance of the tee connector for the treatment device.

[0044] In some embodiments, to facilitate the guidance of the treatment device through the transition channel 400, the extension line of the distal port of the device channel 200 can pass through the transition channel 400 and abut against the inner wall of the transition channel 400 on the side away from the device channel 200 during the insertion of the treatment device. The abutment is reversed by the action of the inner wall of the transition channel 400, and then it can directly cooperate with the inner wall of the transition channel 400. Under the guidance of the inner wall of the transition channel 400, the treatment device is guided to the docking channel 300, so that the treatment device can be quickly inserted into the docking channel 300, thereby improving the passage performance of the tee connector for the treatment device.

[0045] To avoid the negative pressure channel 100 obstructing the installation and use of other functional components in the endoscope handle, the curvature of the negative pressure channel 100 can be set to 25° to 35° to control the space occupied by the negative pressure channel 100. This makes the space occupied by the arc-shaped negative pressure channel 100 similar to that of the linear negative pressure channel 100 in the prior art, so as not to change the installation design of the various functional components in the existing endoscope handle or to minimize the impact.

[0046] Example 2

[0047] This application provides a handle, such as... Figure 7 As shown, it includes a housing 20 and a three-way connector as in Embodiment 1, the three-way connector being disposed at the distal end of the housing 20.

[0048] Example 3

[0049] This application provides an embodiment of an endoscope, such as Figure 7 As shown, the device includes an insertion part 30 and a handle as in Embodiment 2, with the distal end of the docking channel 300 connected to the proximal end of the insertion part 30.

[0050] When the treatment device 40 is inserted, it passes through the device channel 200 and the negative pressure channel 100 in sequence, and enters the proximal end of the insertion part 30 through the docking channel 300, 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 through the proximal end of the insertion part 30, the docking channel 300 and the negative pressure channel 100 in sequence to realize the aspiration of the aspirate.

[0051] 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.

[0052] 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: The invention comprises a base body (10), wherein the proximal end of the base body (10) is provided with a negative pressure channel (100) and an instrument channel (200), and the distal end of the base body (10) is provided with a docking channel (300), wherein the negative pressure channel (100) is an arc-shaped structure, and the proximal port of the instrument channel (200) is used for inserting a treatment instrument (40), and the distal end of the instrument channel (200) is connected with the proximal end of the negative pressure channel (100), and the instrument channel (200) is located on a side away from the arc-shaped opening of the negative pressure channel (100), and the proximal end of the negative pressure channel (100) is used for connecting with a negative pressure source, and the distal end of the negative pressure channel (100) is connected with the proximal end of the docking channel (300), and the distal end of the docking channel (300) is used for connecting with an endoscope insertion part (30).

2. The three-way connector according to claim 1, characterized in that: The angle between the extension line of the distal end port of the negative pressure channel (100) and the axis of the docking channel (300) is an acute angle, and the docking channel (300) is located on the side away from the arc-shaped opening of the negative pressure channel (100).

3. The three-way connector according to claim 2, characterized in that: The angle between the extension line of the distal end port of the negative pressure channel (100) and the axis of the docking channel (300) is 15° to 25°.

4. The three-way connector according to claim 2 or 3, characterized in that: The distal end of the negative pressure channel (100) is connected to the proximal end of the docking channel (300) through a transition channel (400).

5. The three-way connector according to claim 4, characterized in that: The axial cross-section of the inner wall of the transition channel (400) is an arc-shaped structure, and the curvature of the inner wall of the transition channel (400) close to the instrument channel (200) is smaller than the curvature of the inner wall of the transition channel (400) away from the instrument channel (200).

6. The three-way connector according to claim 5, characterized in that: The curvature of the inner wall of the transition channel (400) on the side away from the instrument channel (200) is 40° to 50°.

7. The three-way connector according to claim 4, characterized in that: An extension line of the distal port of the instrument channel (200) passes through or is close to the transition channel (400).

8. The three-way connector according to claim 4, characterized in that: The curvature of the negative pressure channel (100) is 25° to 35°.

9. A handle, characterized in that: It comprises a housing (20) and the three-way connector according to any one of claims 1 to 8, wherein the three-way connector is arranged at the distal end of the housing (20).

10. An endoscope, characterized in that: It comprises an insertion part (30) and the handle according to claim 9, wherein the distal end of the docking channel (300) is connected to the proximal end of the insertion part (30).

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