An apparatus insertion mechanism, handle, and endoscope

Abstract

The application provides an instrument insertion mechanism, a handle 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, a transition channel is arranged in the base body, the distal end of the negative pressure channel is communicated with the proximal end of the docking channel through the transition channel, the axis of the docking channel and the instrument channel are located on both sides of the axis of the negative pressure channel, and the distal end of the instrument channel is communicated with the negative pressure channel or the transition channel. The application effectively reduces the turning radius between the distal end port of the instrument channel and the proximal end port of the docking channel, simultaneously effectively induces the insertion direction of the treatment instrument to be towards the docking channel after one bending, reduces the insertion resistance of the treatment instrument caused by the variable diameter between the negative pressure channel and the docking channel, reduces the negative influence on the control precision caused by the multi-section bending deformation of the treatment instrument, improves the control convenience and control accuracy of the treatment instrument, and increases the use convenience and safety of the endoscope.

Description

Technical Field

[0001] This invention relates to the field of endoscopy technology, and in particular to an instrument insertion mechanism, a handle, and an endoscope. Background Technology

[0002] Endoscopes, as important medical devices in modern surgery, include an operating handle and an insertion part. The insertion part can enter the human body through body cavities or surgical incisions. A camera module at the distal end of the insertion part helps doctors determine the location of lesions and the tissue structure characteristics of those lesions. The operating handle is equipped with a three-way connector, which connects the insertion part to a negative pressure channel and an instrument channel. This allows for the extraction of fluid from body cavities via the negative pressure channel and the insertion of treatment instruments through the instrument channel to sample or deliver therapeutic substances to human tissue. However, during the development of this invention, the applicant discovered that when treatment instruments are inserted through the instrument channel, they tend to bend in multiple segments within the three-way connector, hindering their proper use. Summary of the Invention

[0003] The purpose of this application is to provide a device insertion mechanism, a handle, and an endoscope to solve the aforementioned technical problems in the prior art, mainly including the following three aspects:

[0004] The first aspect of this application provides an instrument insertion mechanism for an endoscope, comprising a substrate, wherein a negative pressure channel and an instrument channel are provided at the proximal end of the substrate, and a docking channel is provided at the distal end of the substrate. The docking channel is used to connect with the insertion part of the endoscope. A transition channel is provided within the substrate. 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 is connected to the proximal end of the docking channel through the transition channel. The transition channel is used to achieve a smooth transition between the distal end of the negative pressure channel and the proximal end of the docking channel. The axis of the docking channel and the instrument channel are located on opposite sides of the axis of the negative pressure channel. The proximal end of the instrument channel is used to insert a treatment instrument, and the distal end of the instrument channel is connected to the negative pressure channel or the transition channel, and the distal end of the instrument channel is close to the proximal end of the docking channel.

[0005] Furthermore, the axis of the negative pressure channel is parallel to the axis of the docking channel.

[0006] Furthermore, the flow cross-sectional area of ​​the docking channel is smaller than that of the negative pressure channel, and the projection of the proximal port of the docking channel onto the cross-sectional plane of the negative pressure channel is located within the cross-section of the negative pressure channel.

[0007] Furthermore, the axis of the instrument channel passes through the inner wall of the transition channel.

[0008] Furthermore, the distance between the axis of the docking channel and the axis of the negative pressure channel is L, the cross-sectional radius of the docking channel is R1, the cross-sectional radius of the negative pressure channel is R2, R1+L<R2, L>0.

[0009] Furthermore, the cross-sectional radius R1 of the docking channel is greater than the distance L between the axis of the docking channel and the axis of the negative pressure channel.

[0010] Furthermore, point A is the intersection of the axis of the instrument channel and the inner wall of the transition channel on the side away from the instrument channel. Along the axis of the negative pressure channel, the transition channel gradually changes from the distal end to the proximal end. The side of the transition channel away from the instrument channel gradually changes to be close to point A, and the side of the transition channel close to the instrument channel gradually changes to be close to the instrument channel, so as to achieve a smooth transition between the proximal end of the connecting channel and the distal end of the negative pressure channel.

[0011] Furthermore, an installation groove is provided on the distal inner wall of the docking channel, the installation groove being used to install the insertion part of the endoscope.

[0012] A second aspect of this application provides a handle including a housing and the aforementioned instrument insertion mechanism, the instrument insertion mechanism being located at the distal end of the housing.

[0013] A third aspect of this application provides an endoscope including the aforementioned instrument insertion mechanism or the aforementioned handle, the endoscope further including an insertion portion, the distal end of the docking channel being connected to the proximal end of the insertion portion.

[0014] Compared with the prior art, the present invention has at least the following technical effects:

[0015] Compared to existing instrument insertion mechanisms, this invention reduces the turning radius between the distal end of the instrument channel and the proximal end of the docking channel, making it easier for the instrument to be transferred from the instrument channel into the docking channel. Simultaneously, a small slope α exists between the docking channel and the negative pressure channel on the side furthest from the instrument channel. This slope α effectively guides the instrument to be inserted towards the docking channel after a single bend, and also reduces the obstruction to insertion caused by the diameter change between the negative pressure channel and the docking channel. This allows the instrument to smoothly enter the docking channel after a single bend through a small insertion angle β, reducing the number of subsequent bending deformations of the instrument. This, in turn, reduces the negative impact of multiple bending deformations on control precision, improves the ease and accuracy of instrument operation, and enhances the convenience and safety of endoscope use. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a schematic diagram of the device insertion mechanism of the present invention;

[0018] Figure 2 This is a top view of the instrument insertion mechanism of the present invention;

[0019] Figure 3 yes Figure 2 Sectional view along line AA;

[0020] Figure 4 This is a side view of the instrument insertion mechanism of the present invention;

[0021] Figure 5 yes Figure 4 Sectional view along the BB direction;

[0022] Figure 6 yes Figure 5 A magnified view of a section at point C;

[0023] Figure 7 This is a schematic diagram of the structure of the endoscope of the present invention;

[0024] Figure 8 This is a schematic diagram of the internal structure of a device insertion mechanism in the prior art;

[0025] Figure 9 yes Figure 8 A magnified view of a section at point D;

[0026] In the picture,

[0027] 10. Base; 20. Handle; 30. Insertion part;

[0028] 110. Negative pressure channel; 120. Instrument channel; 130. Transition channel; 140. Docking channel; 141. Mounting slot. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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 body cavities or surgical incisions. 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 an instrument insertion mechanism, which is connected to the endoscope insertion section. The instrument insertion mechanism has a negative pressure channel and an instrument channel. 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 reach the target location in the body cavity through the insertion section to sample human tissue or deliver therapeutic substances.

[0035] In existing technologies, such as Figure 8 and Figure 9 As shown, when a treatment instrument is inserted through the instrument channel 120, since the instrument is placed inside the mechanism, the instrument channel 120 is generally connected to the docking channel 140 via the negative pressure channel 110. The instrument channel 120 and the docking channel 140 typically have a certain angle, and the diameters of the docking channel 140 and the negative pressure channel 110 are different. This causes the treatment instrument to collide with the inner wall of the negative pressure channel 110 when it enters the negative pressure channel 110 from the instrument channel 120, resulting in a bend. Then, due to the change in diameter between the negative pressure channel 110 and the docking channel 140, it is easily induced... The instrument undergoes a secondary bend at the connection between the negative pressure channel 110 and the docking channel 140, hindering its entry into the docking channel 140. This not only increases the difficulty of insertion but also forces the instrument to be inserted obliquely into the docking channel 140 at a large entry angle β. The larger the entry angle β, the more times the instrument bends against the inner wall of the channel per unit length, resulting in multiple bending deformations within the docking channel 140 and / or the insertion portion 30. This affects the precision of instrument manipulation and hinders its normal use. To address the adverse effects of the instrument insertion mechanism on the instrument, this application provides an instrument insertion mechanism, handle, and endoscope that can reduce the adverse effects on the instrument. The specific structure is shown in the following embodiment.

[0036] Example 1:

[0037] This application provides a device insertion mechanism for an endoscope, such as... Figures 1-4As shown, the system includes a base 10, which can be a one-piece structure or a split structure. For a split structure, it can be composed of two halves joined together or multiple segments joined together. The proximal end of the base 10 is provided with a negative pressure channel 110 and an instrument channel 120, and the distal end is provided with a docking channel 140. The docking channel 140 is used to connect with the insertion part 30 of the endoscope. A transition channel 130 is provided within the base 10. 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 140 through the transition channel 130. The transition channel 130 is used to achieve a smooth transition between the distal end of the negative pressure channel 110 and the proximal end of the docking channel 140. Figure 3 As shown, the axis of the docking channel 140 and the instrument channel 120 are located on both sides of the axis of the negative pressure channel 110. The proximal end of the instrument channel 120 is used to insert a treatment instrument, and the distal end of the instrument channel 120 is connected to the negative pressure channel 110 or the transition channel 130. The distal end of the instrument channel 120 is close to the proximal end of the docking channel 140.

[0038] When it is necessary to insert the treatment instrument into the insertion part 30 of the endoscope during use, such as Figure 5 As shown, the treatment instrument enters from the distal port of the instrument channel 120 and is inserted into the negative pressure channel 110 or the transition channel 130 along the instrument channel 120. At this time, because the axis of the docking channel 140 and the instrument channel 120 are located on opposite sides of the axis of the negative pressure channel 110, compared to the existing structure where the docking channel 140 and the negative pressure channel 110 are coaxial, the turning radius between the distal port of the instrument channel 120 and the proximal port of the docking channel 140 is reduced. This makes it easier for the treatment instrument to rotate from the instrument channel 120 into the docking channel 140. Simultaneously, because the docking channel 140 is located on the side of the negative pressure channel 110 away from the instrument channel 120, the treatment instrument can more easily rotate from the instrument channel 120 into the docking channel 140 during the process of turning and inserting into the docking channel 140. The instrument first abuts against the inner wall of the negative pressure channel 110 or transition channel 130 on the side away from the instrument channel 120, then bends once, and then turns to the docking channel 140 for further insertion. At this time, because the docking channel 140 is positioned away from the instrument channel 120, the height difference between the inner wall of the docking channel 140 on the side away from the instrument channel 120 and the inner wall of the negative pressure channel 110 on the side away from the instrument channel 120 is reduced compared to the prior art. That is, there is a small slope α between the docking channel 140 and the negative pressure channel 110 on the side away from the instrument channel 120. This slope α can effectively guide the insertion direction of the treatment instrument towards the docking channel 140 after the first bend, and can also reduce the obstruction to the insertion of the treatment instrument due to the change in diameter between the negative pressure channel 110 and the docking channel 140. Figure 6As shown, this allows the instrument to smoothly enter the docking channel after a single bend through a small insertion angle β (in this embodiment, the slope α is equivalent to the insertion angle β), thereby delaying the position where the instrument undergoes a second bend (i.e., entering the docking channel 140 through a smaller insertion angle β, correspondingly delaying the position where the instrument first abuts and bends with the inner wall of the docking channel 140 or the inner wall of the insertion part 30). This reduces the number of times the instrument will bend and deform within the docking channel 140 and / or the insertion part 30, thereby reducing the negative impact of multiple bending deformations of the instrument on the control accuracy, improving the ease and accuracy of operation of the instrument, and increasing the ease and safety of using the endoscope.

[0039] On the other hand, when it is necessary to aspirate fluid or other aspirable materials, since the docking channel 140 is radially away from the instrument channel 120, when the aspirable material enters the negative pressure channel 110 from the docking channel 140, the flow path of the aspirable material is farther away from the instrument channel 120. This effectively increases the isolation between the instrument channel 120 and the negative pressure channel 110, thereby preventing the aspirable material from entering the instrument channel 120, reducing the risk of leakage of the aspirable material from the instrument channel 120, and improving the independence and safety of the operation of the instrument channel 120 and the negative pressure channel 110.

[0040] To ensure the stability and safety of suctioning fluids and other aspirated materials and reduce the risk of channel blockage, the axis of the negative pressure channel 110 can be set parallel to the axis of the docking channel 140. This ensures that during the process of the aspirated material being sucked from the docking channel 140 into the negative pressure channel 110, the flow path of the aspirated material is directly towards the negative pressure channel 110, thus ensuring that the aspirated material is stably and safely transported to the negative pressure source through the instrument placement mechanism.

[0041] To improve the stability and safety of aspiration of fluids and other aspirated materials, the flow cross-sectional area of ​​the docking channel 140 can be smaller than that of the negative pressure channel 110. The projection of the proximal port of the docking channel 140 onto the cross-sectional plane of the negative pressure channel 110 is located within the cross-section of the negative pressure channel 110. Based on this structure, during the process of aspirated material being drawn from the docking channel 140 into the negative pressure channel 110, the transition channel 130 located between the docking channel 140 and the negative pressure channel 110 will not obstruct the flow of aspirated material, thereby effectively improving the throughput of aspirated material and enhancing the stability and safety of the aspiration operation of the instrument placement mechanism.

[0042] To ensure that the treatment instruments are quickly and smoothly inserted from the instrument channel 120 into the docking channel 140, such as Figure 3As shown, the axis of the instrument channel 120 can be set to pass through the inner wall of the transition channel 130. This way, when a treatment instrument is inserted, the treatment instrument exiting the instrument channel 120 will move directly at an angle towards the inner wall of the transition channel 130. During the contact process with the inner wall of the transition channel 130, as... Figure 5 As shown, guided by the inner wall of the transition channel 130, the treatment instrument undergoes bending deformation and then turns at a small entry angle β to continue advancing into the docking channel 140. This reduces the number of bending deformation segments during the insertion of the treatment instrument and ensures that the treatment instrument is quickly and smoothly inserted into the insertion part 30 of the endoscope, effectively improving the convenience and safety of inserting the treatment instrument and the endoscope.

[0043] To ensure that the transition channel 130 can accurately guide the treatment device that has undergone a single bending deformation to the docking channel 140, and also reduce the entry angle β of the treatment device into the docking channel 140, the distance between the axis of the docking channel 140 and the axis of the negative pressure channel 110 can be L, the cross-sectional radius of the docking channel 140 can be R1, the cross-sectional radius of the negative pressure channel 110 can be R2, R1+L<R2, L>0. Based on this structure, it can also be ensured that the transition channel 130 will not obstruct the flow of the aspirated material, thereby effectively improving the throughput performance of the aspirated material and enhancing the stability and safety of the device placement mechanism during suction operation.

[0044] Furthermore, to improve the passage performance of the aspirated material through the instrument insertion mechanism, the cross-sectional radius R1 of the docking channel 140 can be set to be greater than the distance L between the axis of the docking channel 140 and the axis of the negative pressure channel 110. Based on this structure, the diameters of the docking channel 140 and the insertion part 30 can be set to be larger to accommodate larger treatment instruments or to improve the space utilization of the endoscope insertion part 30.

[0045] To reduce the adverse effects of the instrument insertion mechanism on the precision of instrument handling, such as Figure 3As shown, point A can be defined as the intersection of the axis of the instrument channel 120 and the inner wall of the transition channel 130 on the side away from the instrument channel. Along the axial direction of the negative pressure channel 110, the transition channel 130 gradually transitions from the distal end to the proximal end. The side of the transition channel 130 away from the instrument channel 120 gradually transitions towards point A, and the side of the transition channel 130 near the instrument channel 120 gradually transitions towards the instrument channel 120, thus achieving a smooth transition between the proximal end of the docking channel 140 and the distal end of the negative pressure channel 110. Based on this structure, along the axial direction of the docking channel 140, the distance between the proximal end face of the docking channel 140 and point A is the induction distance. The larger the induction distance, the weaker the functionality of the transition channel 130 in guiding the bending deformation of the treatment instrument. The weaker the functionality in guiding the bending deformation, the more difficult it is to treat the instrument. The device is accurately guided into the docking channel 140. The smaller the induction distance, the larger the entry angle β of the device into the docking channel 140. The larger the entry angle β, the more bending deformation segments the device will have in the docking channel 140 or the insertion part 30. Therefore, this embodiment controls the induction distance within a reasonable range, that is, it is set near point A. Based on the induction distance corresponding to point A, it can accurately guide the device with one bending deformation to the docking channel 140, and ensure that the device is at a small entry angle β when it enters the docking channel 140. This reduces the number of bending deformation segments of the device in the docking channel 140 or the insertion part 30, reduces the adverse effect of the device placement mechanism on the control accuracy of the device, and ensures the control accuracy of the device.

[0046] To achieve a stable connection between the instrument insertion mechanism and the endoscope insertion part 30, an installation groove 141 can be provided on the inner wall of the distal end of the docking channel 140. The installation groove 141 is used to install the endoscope insertion part 30.

[0047] Example 2:

[0048] This application provides a handle 20, including a housing and the instrument insertion mechanism of Embodiment 1, wherein the instrument insertion mechanism is located at the distal end of the housing.

[0049] Example 3:

[0050] This application provides an endoscope, such as... Figure 7 As shown, the endoscope includes the instrument insertion mechanism in Embodiment 1 or the handle 20 in Embodiment 2. The endoscope also includes an insertion part 30, and the distal end of the docking channel 140 is connected to the proximal end of the insertion part 30.

[0051] When the treatment device is inserted, it passes through the device channel 120, the transition channel 130 and the docking channel 140 in sequence, enters the proximal end of the insertion part 30, 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 140, the transition channel 130 and the negative pressure channel 110 in sequence to achieve the aspiration of the aspirate.

[0052] 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.

[0053] 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. An instrument insertion mechanism for an endoscope, characterized in that, The device includes a substrate (10), with a negative pressure channel (110) and an instrument channel (120) at its proximal end and a docking channel (140) at its distal end. The docking channel (140) is used to connect with the insertion part (30) of an endoscope. A transition channel (130) is provided inside the substrate (10). 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 (140) through the transition channel (130). The transition channel (130) is used to realize... A smooth transition between the distal end of the negative pressure channel (110) and the proximal end of the docking channel (140), wherein the axis of the docking channel (140) and the instrument channel (120) are located on both sides of the axis of the negative pressure channel (110), the proximal end of the instrument channel (120) is used to insert a treatment instrument, the distal end of the instrument channel (120) is connected to the negative pressure channel (110) or the transition channel (130), and the distal end of the instrument channel (120) is close to the proximal end of the docking channel (140); the axis of the negative pressure channel (110) is parallel to the axis of the docking channel (140).

2. The device insertion mechanism as described in claim 1, characterized in that, The cross-sectional area of ​​the docking channel (140) is smaller than that of the negative pressure channel (110), and the projection of the proximal port of the docking channel (140) onto the cross-sectional plane of the negative pressure channel (110) is located within the cross-section of the negative pressure channel (110).

3. The instrument insertion mechanism as described in claim 2, characterized in that, The axis of the instrument channel (120) passes through the inner wall of the transition channel (130).

4. The instrument insertion mechanism as described in any one of claims 1 to 3, characterized in that, The distance between the axis of the docking channel (140) and the axis of the negative pressure channel (110) is L, the cross-sectional radius of the docking channel (140) is R1, the cross-sectional radius of the negative pressure channel (110) is R2, R1+L<R2, L>0.

5. The device insertion mechanism as described in claim 4, characterized in that, The cross-sectional radius R1 of the docking channel (140) is greater than the distance L between the axis of the docking channel (140) and the axis of the negative pressure channel (110).

6. The device insertion mechanism as described in claim 4, characterized in that, Point A is the intersection of the axis of the instrument channel (120) and the inner wall of the transition channel (130) on the side away from the instrument channel (120). Along the axis of the negative pressure channel (110), the transition channel (130) gradually changes from the distal end to the proximal end. The side of the transition channel (130) away from the instrument channel (120) gradually changes to be close to point A, and the side of the transition channel (130) close to the instrument channel (120) gradually changes to be close to the instrument channel (120), so as to achieve a smooth transition between the proximal end of the connecting channel and the distal end of the negative pressure channel (110).

7. The instrument insertion mechanism as described in any one of claims 1 to 3, characterized in that, An installation groove (141) is provided on the inner wall of the distal end of the docking channel (140), and the installation groove (141) is used to install the insertion part (30) of the endoscope.

8. A handle, characterized in that, It includes a housing and a device insertion mechanism as described in any one of claims 1 to 7, wherein the device insertion mechanism is located at the distal end of the housing.

9. An endoscope, characterized in that, The endoscope includes the instrument insertion mechanism as described in any one of claims 1 to 7 or the handle (20) as described in claim 8, and further includes an insertion part (30), wherein the distal end of the docking channel (140) is connected to the proximal end of the insertion part (30).

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