Distal structure, insertion portion and endoscope

Abstract

The distal end structure, insertion part and endoscope disclosed by the application relate to the technical field of medical devices. The distal end structure has a first channel and a second channel. The guide direction of at least part of the first channel intersects with the extension direction of the distal end structure, and the distal end of the first channel at least partially penetrates the outer peripheral wall of the distal end structure. The second channel is arranged along the extension direction of the distal end structure. The distal end of the second channel communicates with the first channel through the inner wall surface of the first channel. The distal end structure is beneficial to the miniaturization of the radial size of the insertion part, so as to enter a more narrow space.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a distal structure, an insertion portion and an endoscope. BACKGROUND

[0002] An endoscope is a medical device used to examine internal organs and tissues in the human body. It consists of a flexible tubular structure and a small camera that can be inserted into the body through natural openings such as the mouth, nose, esophagus, stomach, intestines, or through incisions. Endoscopes are usually combined with a light source and image sensor, allowing doctors to clearly observe internal structures and make diagnoses and treatments.

[0003] In order to better diagnose and treat lesions in the body, instruments are often needed. Therefore, it is generally necessary to provide a channel for instruments to enter through the insertion portion of the endoscope. For example, during the treatment of kidney stone disease, a holmium laser fiber or thulium laser fiber can be inserted through the instrument channel of the nephroscope insertion portion for laser lithotripsy. In order to enter smaller spaces, the insertion portion of the endoscope needs to be made smaller. SUMMARY

[0004] The present application discloses a distal structure, an insertion portion and an endoscope to solve the technical problem of large radial size of the distal structure of the insertion portion of the endoscope in the related art.

[0005] To solve the above problems, the present application adopts the following technical solutions:

[0006] Some embodiments of the present application provide a distal structure. The distal structure has a first channel and a second channel. The guide direction of at least part of the first channel intersects the extension direction of the distal structure, and the distal end of the first channel at least partially penetrates the outer peripheral wall of the distal structure. The second channel is arranged along the extension direction of the distal structure. The distal end of the second channel communicates with the first channel through the inner wall surface of the first channel.

[0007] Some embodiments of the present application also provide an insertion portion. The insertion portion includes the distal structure provided by some embodiments of the present application.

[0008] In some embodiments, the insertion portion further includes a first tube structure and a second tube structure. The first tube structure communicates with the first channel. The second tube structure communicates with the second channel.

[0009] Some embodiments of the present application also provide an endoscope. The endoscope includes the insertion portion provided by the embodiments of the present application.

[0010] The technical solutions adopted by the present application can achieve the following beneficial effects:

[0011] The distal structure provided by the application can be used in the insertion part of an endoscope. The distal end of the second channel in the distal structure penetrates the inner wall surface of the first channel and communicates with the first channel, that is, the second channel and the first channel meet at the first channel, which can avoid the second channel independently occupying space on the distal side of the distal structure. Specifically, the medium, such as an instrument or a fluid, transported by the second channel can enter the first channel along the second channel and be output from the distal end of the first channel. This is beneficial to reduce the radial size of the distal end of the distal structure. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0013] Figure 1 is a schematic diagram of an endoscope provided by some embodiments of the present application;

[0014] Figure 2 is a schematic diagram of an insertion part provided by some embodiments of the present application Figure 1 ;

[0015] Figure 3 is a schematic diagram of an insertion part provided by some embodiments of the present application Figure 2 ;

[0016] Figure 4 is an enlarged schematic diagram of A in Figure 3 ;

[0017] Figure 5 is a cross-sectional view of a distal structure provided by some embodiments of the present application;

[0018] Figure 6 is a cross-sectional view of the distal end of an insertion part provided by some embodiments of the present application Figure 1 ;

[0019] Figure 7 is a cross-sectional view of the distal end of an insertion part provided by some embodiments of the present application Figure 2 ;

[0020] Figure 8 is a schematic diagram of an insertion part provided by some embodiments of the present application Figure 3 ;

[0021] Figure 9 is a partial enlarged schematic diagram of B in Figure 8 ;

[0022] Figure 10is a cross-sectional view of an insertion portion provided by some embodiments of the present application Figure 1 ;

[0023] Figure 11 is a cross-sectional view of an insertion portion provided by some embodiments of the present application Figure 2 ;

[0024] Figure 12 is a cross-sectional view of a segment tube provided by some embodiments of the present application

[0025] Figure 13 is a cross-sectional view of an insertion portion provided by some embodiments of the present application Figure 3 ;

[0026] Figure 14 is a top view of a distal structure provided by some embodiments of the present application.

[0027] BRIEF DESCRIPTION OF DRAWINGS 100-distal structure; 101-first channel; 1011-inclined segment; 1012-extended segment; 102-second channel; 103-distal face; 104-third channel; 105-avoidance slot; 110-camera module; 111-cable; 120-mounting seat; 121-conical portion; 1211-side wall; 200-insertion portion; 210-first tube structure; 220-second tube structure; 230-segment tube; 231-mounting slot; 232-mounting hole; 240-third tube structure; 250-pulling rope; 270-sleeve; 300-handle; 400-instrument. DETAILED DESCRIPTION

[0028] In order to make the objects, technical solutions, and advantages of the present application clearer, the technical solutions of the present application will be described in detail below. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0029] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of a kind and do not limit the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally represents a "or" relationship between the front and rear associated objects.

[0030] In the embodiments of the present application, "proximal end" and "distal end" refer to the relative positions of the endoscope and its accessories in the use environment relative to the user, wherein the end closer to the user is designated as the "proximal end", and the end farther from the user is designated as the "distal end".

[0031] In the related art, the distal end of the insertion part of the endoscope not only needs to be provided with an instrument channel for transmitting media, but also needs to be provided with electronic components such as a camera module and a light source. Further, the size of the insertion part of the endoscope is limited by the structure of the distal end of the insertion part. In some solutions, in order to be able to make the size of the insertion part small, the size of the distal end of the instrument channel is reduced, so that although the radial size of the distal end is reduced, the radial size of the instrument channel is relatively small, which affects the transmission of instruments or other media. In some solutions, the channel for transmitting media and the devices such as the camera module and the light source are partially overlapped in the axial direction, and the distal end of the instrument channel is obliquely arranged to avoid the camera module and the light source and other devices. Although this can avoid reducing the inner diameter of the instrument channel, the distal end of the instrument channel is poor in guiding the instruments, and it is easy to cause the instruments to be unable to extend out of the distal end of the insertion part along the extension direction of the distal end structure, which is not conducive to the operation of the instruments within the field of view of the camera module.

[0032] To solve the above problems, the present application provides a distal end structure. The distal end structure is provided with two channels, one channel is arranged along the extension direction of the distal end structure, and the distal end of the other channel penetrates the outer peripheral wall of the distal end structure in a partially inclined manner. Moreover, the distal end of the channel arranged along the extension direction of the distal end structure penetrates the inner wall of the other channel and is communicated, so as to realize the sharing of space of the two channels at the distal end structure, thereby beneficially reducing the radial size of the distal end structure and solving the problem of large radial size of the distal end structure. In addition, since one of the channels is arranged along the extension direction of the distal end structure, it can provide a transmission channel for some instruments that need to be operated within the field of view of the camera module through the channel, so that the instruments can extend out of the distal end of the insertion part along the extension direction of the distal end structure.

[0033] The distal end structure, the insertion part and the endoscope provided by the embodiments of the present application will be described in detail below in combination with the accompanying drawings and specific embodiments and application scenarios. Figures 1 to 14

[0034] The present application provides a distal end structure 100. Referring to Figure 1 The distal end structure 100 can be used in the insertion part 200 of the endoscope. For example, the distal end structure 100 constitutes the distal end of the insertion part 200.

[0035] Referring to Figure 5 ​The distal structure 100 has a first channel 101 and a second channel 102. For example, both the first channel 101 and the second channel 102 can be used to transmit the instrument 400 or other fluid medium to the distal end of the insertion portion 200.

[0036] Reference Figure 5 In some embodiments, at least a portion of the guiding direction of the first channel 101 intersects the extending direction of the distal structure 100, and the distal end of the first channel 101 at least partially penetrates the outer peripheral wall of the distal structure 100. For example, as... Figure 5 As shown, the extension direction of the distal structure 100 can Figure 5 The direction indicated by the y-axis. For example, Figure 5 The direction indicated by the x-axis is one of the radial directions of the distal structure 100. Specifically, the x-axis is perpendicular to the y-axis. The guiding direction of a certain portion of the first channel 101 is the extension direction of the first channel 101 at that portion, that is, the tangential direction of the first channel 101 at that location. For example, as shown... Figure 5 As shown, Figure 5 The dashed line indicates the extension path of the first channel 101. The guiding direction at point D is the extension direction at point D, which is the tangent direction of the extension path of the first channel 101 at that point. Specifically, the guiding direction of the first channel 101 at point D is F1.

[0037] Reference Figure 5 At least part of the guiding direction of the first channel 101 intersects with the extension direction of the distal structure 100, so that the first channel 101 can overlap with the second channel 102 in the extension direction of the distal structure 100, thereby creating conditions for the second channel 102 to connect with the first channel 101 and share space without changing the extension direction.

[0038] Reference Figure 2 In some embodiments, the distal end of the first channel 101 penetrates the outer peripheral wall of the distal structure 100, meaning the distal port of the first channel 101 is located on the outer peripheral wall of the distal structure 100. In some embodiments, the distal end of the first channel 101 partially penetrates the outer peripheral wall of the distal structure 100 and partially penetrates the distal end face 103 of the distal structure 100. Since the distal end of the first channel 101 at least partially penetrates the outer peripheral wall of the distal structure 100, the area occupied by the first channel 101 on the distal end face 103 of the distal structure 100 can be reduced while maintaining the same flow area. This provides more space for other components disposed on the distal structure 100 and also helps to reduce the radial dimension of the distal structure 100.

[0039] Reference Figure 5The second channel 102 is arranged along the extending direction of the distal structure 100. The distal end of the second channel 102 penetrates the inner wall of the first channel 101 and communicates with the first channel 101, i.e. the distal end port of the second channel 102 is formed on the inner wall of the first channel 101. In this way, the second channel 102 neither occupies the space of the distal face 103 of the distal structure 100 nor occupies the space of the peripheral wall of the distal structure 100. Therefore, this arrangement is beneficial to reducing the radial dimension of the distal structure 100.

[0040] With reference to Figure 6 In some embodiments, the second channel 102 is configured to accommodate the instrument 400. The instrument 400 can be, but is not limited to, a sampling needle, a stone basket, a laser fiber, a pressure sensor, a temperature sensor, a guide wire, etc. In optional embodiments, the first channel 101 is configured to infuse or aspirate fluid medium.

[0041] In the related art, the fluid medium transmission channel and the instrument transmission channel share the same channel. Since the instrument can be bent in the fluid channel, the resistance of fluid flow in the channel is increased. In the above scheme, the fluid medium transmission channel and the instrument transmission channel can be separated at the distal structure 100 along the direction from the distal end of the insertion part 200 to the proximal end. This is beneficial to preventing the instrument from blocking the fluid medium and improving the passability of the fluid medium in the insertion part 200.

[0042] In some embodiments, the inner diameter of the second channel 102 is adapted to the outer diameter of the instrument 400, and the second channel 102 is in sliding fit with the instrument 400. In this embodiment, the inner diameter of the second channel 102 can be set so that a gap fit can be formed between the second channel 102 and the instrument 400, and the gap size between the instrument 400 and the inner wall of the second channel 102 is ensured to be less than a predetermined value. In this way, it is beneficial to improve the guiding accuracy of the insertion and extension direction of the instrument 400, reduce the radial dimension of the distal structure 100, and reduce the hindering effect of the instrument 400 on the transmission of fluid medium.

[0043] With reference to Figure 6 In some embodiments, when the instrument 400 needs to extend along the extending direction of the distal structure 100, the second channel 102 is configured to accommodate the instrument 400. For example, when an endoscope is used to treat stones in the kidney, the inner diameter of the second channel 102 can be configured so that the inner diameter of the second channel 102 is adapted to the outer diameter of the laser fiber, so that the second channel 102 can provide guidance for the extension of the laser fiber. In addition, the second channel 102 is arranged along the extending direction of the distal structure 100, which can avoid the bending of the laser fiber at the distal structure 100, reduce the loss of laser energy at the distal structure 100, and be beneficial to heat dissipation at the distal structure 100.

[0044] In some embodiments, during the treatment of kidney stones, the first channel 101 is used to deliver fluid containing the stone. In some examples, the first channel 101 can be used to infuse fluid into the kidney to ensure that the intrarenal pressure is maintained within a safe and reliable range. In other examples, the first channel 101 can be used to aspirate fluid and stone particles from the kidney to maintain intrarenal pressure and expel kidney stones. In this embodiment, the first channel 101, by delivering a fluid medium, helps to remove the heat generated during the laser fiber's stone-dissolving process located in the second channel 102, thereby benefiting the heat dissipation of the distal structure 100.

[0045] In some embodiments, the inner diameter of the first channel 101 is larger than the inner diameter of the second channel 102. This helps prevent the device 400 from blocking the first channel 101 when the device 400 is housed in the second channel 102.

[0046] Reference Figure 5 In some embodiments, along the extension direction of the distal structure 100, the projection of the distal port of the first channel 101 onto the distal surface 103 of the distal structure 100 is a first projection. Along the extension direction of the distal structure 100, the projection of the distal port of the second channel 102 onto the distal surface 103 of the distal structure 100 is a second projection. The second projection is located within the first projection; that is, after the instrument 400 extends into the first channel 101 along the second channel 102, it can continue to extend from the distal port of the first channel 101 along the extension direction of the second channel 102. This facilitates the extension of the instrument 400 from the distal end of the insertion portion 200 along the guiding direction of the second channel 102, making the extension path of the instrument 400 more controllable.

[0047] Reference Figure 3 and Figure 4 In some embodiments, the instrument 400 within the second channel 102 can enter the first channel 101 along the extending direction of the distal structure 100 and exit the distal structure 100 through the distal port of the first channel 101. This is beneficial because after the instrument 400 extends from the distal end of the insertion portion 200, it can be better positioned within the endoscope's field of vision. This allows the operator to manipulate the instrument 400 under visual guidance, thus improving safety during instrument 400 operation.

[0048] Reference Figure 5 In some embodiments, the area of ​​the portion of the far port of the first channel 101 that penetrates the far end face 103 is less than or equal to the projected area of ​​the far port of the second channel 102 on the far end face 103.

[0049] Reference Figure 5In some embodiments, the first channel 101 comprises an inclined section 1011 and an extension section 1012 in communication with a proximal end of the inclined section 1011. The inclined section 1011 is arranged to intersect the extension direction of the distal structure 100. The extension section 1012 extends along the extension direction of the distal structure 100 towards the proximal end of the distal structure 100. The cross-sectional area of the inclined section 1011 is smaller than that of the extension section 1012.

[0050] In some embodiments, the cross-sectional area of the inclined section 1011 is smaller than that of the extension section 1012 is beneficial for avoiding the blockage of the stone in the middle or proximal end of the stone removal channel when the stone is removed through the first channel 101. Specifically, during the process of removing the stone, the large stone particles are most likely to be blocked in the inclined section 1011. The inclined section 1011 is located at the distal end of the stone removal channel, so it is easier to clean the blocked stone in the channel. For example, the blocked stone can be cleaned by reversing the perfusion of the fluid. Specifically, by changing the first channel 101 for removing the stone to perfuse the fluid into the kidney, the stone accumulated and blocked in the inclined section 1011 can be quickly cleaned out of the first channel 101.

[0051] In addition, in the above embodiments, the extension section 1012 and the second channel 102 are arranged along the extension direction of the distal structure 100, which is beneficial for arranging the pipes connected to the extension section 1012 and the pipes connected to the second channel 102 in the insertion part 200. In some embodiments, the pipes connected to the extension section 1012 and the pipes connected to the second channel 102 are arranged along the extension direction of the insertion part 200, so as to facilitate the transmission of the fluid medium or the instrument in the channel.

[0052] Referring to Figure 5 In some embodiments, the distal end of the second channel 102 penetrates the inner wall surface of the inclined section 1011. For example, when the stone particles are blocked in the inclined section 1011, the stone in the second channel 102 can be used to clean the stone blocked in the inclined section 1011 and the stone blocked in the distal port of the inclined section 1011 to the first channel 101.

[0053] Referring to Figure 5 In some embodiments, the distal structure 100 comprises a camera module 110 and a mounting seat 120. The camera module 110 is arranged at the distal end of the mounting seat 120. The first channel 101 and the second channel 102 are arranged in the mounting seat 120, and the proximal end of the camera module 110 is at least partially opposite to the first channel 101 in the extension direction of the distal structure 100. Referring to Figure 8 and Figure 9For example, the camera module 110 is connected with the cable 111 arranged in the insertion portion 200, so that the camera module 110 can be powered or transmit information through the cable 111. In some embodiments, the distal structure 100 further comprises a light source (not shown in the figure). Optionally, the light source can be connected with the cable 111. Specifically, the light source can be, but is not limited to, an LED lamp.

[0054] In the above embodiments, the camera module 110 is opposite to at least part of the first channel 101, which is beneficial to reduce the size of the first channel 101 after the radial arrangement of the camera module 110, and further beneficial to reduce the radial size of the distal structure 100. In further optional embodiments, the proximal end of the camera module 110 is opposite to at least part of the inclined section 1011 of the first channel 101, so that the first channel 101 can extend to the distal end face 103 or the peripheral wall of the distal structure 100 by avoiding the camera module 110 by using the inclined section 1011.

[0055] Referring to Figure 4 and Figure 5 In some embodiments, along the extension direction of the distal structure 100, the projection of the camera module 110 on the distal end face 103 of the distal structure 100 is spaced apart from or tangent to the projection of the distal end of the second channel 102 on the distal end face 103 of the distal structure 100. In this way, the instrument 400, such as a laser fiber, extending from the second channel 102 can avoid the camera module 110. During the process of laser lithotripsy, the camera module 110 can be prevented from being damaged by the laser.

[0056] Referring to Figure 5 In some embodiments, the peripheral wall of the distal structure 100 is provided with an avoiding groove 105. The avoiding groove 105 extends along the extension direction of the distal structure 100. One end of the avoiding groove 105 is in communication with the first channel 101. The other end of the avoiding groove 105 penetrates the peripheral wall and / or the distal end face 103 of the distal structure 100. For example, after the instrument 400 enters the first channel 101 along the second channel 102, it can continue to extend along the extension direction of the distal structure 100. In some embodiments, the instrument can avoid the peripheral wall of the distal structure 100 located on the distal side of the distal end of the first channel 101 through the avoiding groove 105.

[0057] In some embodiments, the proximal end of the first channel 101 is arranged along the extension direction of the distal structure 100. Along the extension direction of the distal structure 100, the projection of the proximal end of the first channel 101 on the distal end face 103 of the distal structure 100 at least partially overlaps the projection of the camera module 110 on the distal end face 103 of the distal structure 100. Specifically, the proximal end of the first channel 101 can overlap the camera module 110 along the extension direction of the distal structure 100, which is beneficial to reduce the size of the distal structure 100.

[0058] In some embodiments, when the distal structure 100 is used in the insertion portion 200, the first channel 101 can be in communication with a tube, so that the first channel 101 can extend along the insertion portion 200 through the tube. This is beneficial to reduce the size of the insertion portion 200.

[0059] Referring to Figure 5 In some embodiments, the camera module 110 is located at a side of the first channel 101 away from the second channel 102. For example, in a process of laser lithotripsy, the influence of heat generated by the laser on the camera module 110 can be reduced.

[0060] Referring to Figure 5 In some embodiments, the distal structure 100 further has a third channel 104. The third channel 104 is located at a side of the camera module 110 away from the first channel 101, and the third channel 104 extends through the distal structure 100 along the extension direction of the distal structure 100. For example, the third channel 104 can be used to transport fluid and / or instruments.

[0061] In some embodiments, the third channel 104 can be used to transport sensors. For example, the third channel 104 can be used to transport at least one of a pressure sensor, a temperature sensor, and a light intensity sensor. Specifically, in the process of laser lithotripsy, the third channel 104 can be used to transport a pressure sensor, such as a pressure guide wire.

[0062] In some embodiments, the inner diameter of the third channel 104 is smaller than the inner diameter of the first channel 101.

[0063] Referring to Figure 4 、 Figure 5 In some embodiments, the distal end of the mounting seat 120 has a tapered portion 121. For example, the radial dimension of the tapered portion 121 gradually decreases in the direction from the proximal end of the mounting seat 120 to the distal end of the mounting seat 120. Here, the radial dimension of the tapered portion 121 can be the distance between the two opposite sides of the cross section of the tapered portion 121. For example, when the cross section of the tapered portion 121 is circular, the radial dimension of the tapered portion 121 can be the diameter of the tapered portion 121.

[0064] In some embodiments, the cross section of the taper 121 is at least one of circular, elliptical, polygonal. Preferably, the cross section of the taper 121 is one of circular, elliptical, polygonal. In some embodiments, the cross section of the first section of the taper 121 along the extension direction of the mount 120 is elliptical, and the cross section of the second section is circular. The shape of the cross section of the different sections of the taper 121 can be designed according to actual conditions. For example, the distal structure 100 further comprises a light source. The light source is arranged adjacent to the camera module 110. Specifically, the cross section of the section of the taper 121 where the camera module 110 and the light source are arranged is elliptical. The cross section of the section of the taper 121 where only the camera module 110 is arranged is circular.

[0065] In the above embodiments, the distal end of the mount 120 forms the taper 121, which is beneficial for the distal structure 100 to enter the cavity. Specifically, the side wall 1211 of the taper 121 can guide the distal structure 100 to enter the cavity, and is beneficial for reducing the scraping of the distal structure 100 on the inner wall of the cavity.

[0066] In some embodiments, the distal end of the first channel 101 at least partially penetrates the side wall 1211 of the taper 121, so as to reduce the radial dimension of the distal face 103 of the mount 120.

[0067] In some embodiments, the distal end of the first channel 101 is arranged at the side wall 1211 of the taper 121, so as to avoid the first channel 101 occupying the radial dimension of the distal face 103 of the mount 120.

[0068] With reference to Figure 2 , Figure 3 and Figure 14 , in some embodiments, the distal end of the taper 121 is arranged eccentrically relative to the proximal end of the taper 121 and away from the side of the distal port of the first channel 101. Specifically, the taper 121 can reserve more space for the first channel 101 at the side adjacent to the distal port of the first channel 101.

[0069] With reference to Figure 9 and Figure 14 , in some embodiments, along the extension direction of the distal structure 100, the projection of the camera module 110 on the distal end face of the taper 121 is located within the distal end face of the taper 121. This embodiment is beneficial for arranging the camera module 110 at the end of the taper 121, so as to avoid other components affecting the field of view of the camera module 110.

[0070] In another aspect, the embodiments of the present application further provide an insertion part. The insertion part comprises the distal structure 100 provided by the present application, and has the same or similar beneficial effects as the distal structure 100.

[0071] With reference to Figure 2In some embodiments, the insertion portion 200 further comprises a first tube structure 210 and a second tube structure 220. The first tube structure 210 is in communication with the first channel 101. The second tube structure 220 is in communication with the second channel 102. In an example, the first tube structure 210 and the second tube structure 220 are both arranged in the insertion portion 200 along the extension direction of the insertion portion 200, for transmitting the fluid medium and / or the instrument 400.

[0072] In some embodiments, the extension section 1012 of the first channel 101 extends towards the proximal end of the distal structure 100 along the extension direction of the distal structure 100, so that the communication position of the first tube structure 210 with the first channel 101 can maintain the same bending curvature as the insertion portion 200, thereby facilitating the instrument 400 or the delivered medium to enter the first channel 101 from the first tube structure 210.

[0073] Referring to Figure 3 and Figure 4 In some embodiments, the insertion portion 200 further comprises a plurality of segment tubes 230. The plurality of segment tubes 230 are arranged in the extension direction of the second tube structure 220. In an example, the plurality of segment tubes 230 are sequentially connected to form a curved tube.

[0074] The plurality of segment tubes 230 are arranged in the extension direction of the second tube structure 220 along the second tube structure 220. In an example, the extension direction of the second tube structure 220 is the direction shown by the y-axis in Figure 6 In some embodiments, the extension direction of the second tube structure 220 in the insertion portion 200 is the same as the extension direction of the distal structure 100. In an example, the extension direction of the second tube structure 220 is the direction shown by the x-axis in Figure 6 and the direction shown by the y-axis in Figure 6 are perpendicular. Specifically, Figure 6 the direction shown by the x-axis in Figure 5 is the same as the direction shown by the x-axis in Figure 6 the direction shown by the y-axis in Figure 5 is the same as the direction shown by the y-axis in Figure 4 Referring to , the second tube structure 220 can support the relative rotation between the two adjacent segment tubes 230 to realize the bending of the insertion portion 200. The second tube structure 220 sequentially penetrates the segment tubes 230. Specifically, the second tube structure 220 sequentially penetrates each of the segment tubes 230. In an example, the extension direction of the second tube structure 220 is the same as the extension direction of the second tube structure 220 sequentially penetrating each of the segment tubes 230. Specifically, in the process of bending the insertion portion 200, the two adjacent segment tubes 230 are deflected radially to the insertion portion 200 with the support of the second tube structure 220, so as to realize the bending of the insertion portion 200.

[0075] In the above scheme, the second tube structure 220 can provide a pivot axis for the deflection between the segment tubes 230, and can also form a space for accommodating other components, thus achieving two purposes with one structure, which is beneficial for simplifying the structure of the insertion portion 200 and reducing the radial dimension of the insertion portion 200.

[0076] With reference to Figure 4 and Figure 9 , in some embodiments, the second tube structure 220 comprises a spiral tube. Specifically, the second tube structure 220 can be a spiral tube. Exemplarily, the spiral tube can be, but is not limited to, a spring tube. The second tube structure 220 is provided as a spiral tube, which is beneficial for reducing the bending resistance of the curved tube. In some embodiments, the second tube structure 220 further comprises a cylindrical structure covering the spiral tube structure, so as to improve the sealing performance of the second tube structure 220.

[0077] In some embodiments, the second tube structure 220 comprises at least one of a metal spiral tube and / or a metal braided tube. In this way, the second tube structure 220 is beneficial for reducing the interference of an external electromagnetic field with the instrument 400 in the second tube structure 220. In the case that the instrument 400 itself generates electromagnetic signals, the second tube structure 220 can also reduce the interference of the electromagnetic signals generated by the instrument 400 with other electrical structures in the environment.

[0078] With reference to Figures 10 to 13 , at least part of the second tube structure 220 is embedded in the tube wall of the segment tube 230, and the second tube structure 220 axially penetrates the segment tube 230 along the segment tube 230. In this embodiment, the second tube structure 220 can share at least part of the space in the radial direction with the tube wall of the segment tube 230, which is beneficial for reducing the radial dimension of the insertion portion 200. Exemplarily, with reference to Figure 11 and Figure 12 , the outer peripheral wall or the inner side wall of the segment tube 230 is provided with a mounting groove 231. With reference to Figure 11 , the second tube structure 220 is embedded in the mounting groove 231.

[0079] With reference to Figure 12 , the mounting groove 231 is arranged on the outer peripheral wall of the segment tube 230, and the second tube structure 220 does not protrude from the outer peripheral wall of the segment tube 230. This embodiment is beneficial for maintaining the external appearance of the insertion portion 200. Exemplarily, the second tube structure 220 is tangent to the outer peripheral wall of the segment tube 230.

[0080] With reference to Figure 13In some embodiments, the mounting groove 231 penetrates the outer peripheral wall of the segment pipe 230 along the radial direction of the segment pipe 230. This embodiment can further realize the space sharing of the second pipe structure 220 and the pipe wall of the segment pipe 230 in the radial direction, which is beneficial to sufficiently reduce the radial dimension of the insertion part 200. In addition, in the process of bending the insertion part 200, the groove width of the mounting groove 231 can better adapt to the deformation of the second pipe structure 220 to increase or decrease, which is beneficial to reduce the stress on the second pipe structure 220.

[0081] With reference to Figures 10 to 13 In some embodiments, the inner wall of the second pipe structure 220 is attached to the inner wall of the mounting groove 231. The groove width of the mounting groove 231 is smaller than the diameter of the second pipe structure 220. For example, the groove width of the mounting groove 231 is as shown by D1 in Figure 12 In this embodiment, the second pipe structure 220 can be radially limited by the groove wall of the mounting groove 231, which is beneficial to improve the reliability of the assembly of the second pipe structure 220 and the segment pipe 230.

[0082] In some further schemes, as shown in Figure 11 The mounting groove 231 is recessed in the outer peripheral wall or the inner side wall of the segment pipe 230 along the radial direction of the segment pipe 230. That is, the groove depth direction of the mounting groove 231 is the radial direction of the segment pipe 230. Specifically, the groove depth direction of the mounting groove 231 is the direction shown by the x-axis in Figure 12 For example, in the insertion part 200, the groove depth direction of the mounting groove 231 is the same as one of the radial directions of the distal structure 100. Specifically, the groove depth direction of the mounting groove 231 is the same as the direction shown by the x-axis in Figure 12 and the direction shown by the x-axis in Figure 5 In addition, the direction shown by the z-axis in Figure 12 is perpendicular to the x-axis and the y-axis in Figure 5 In this embodiment, the groove wall of the mounting groove 231 can be supported on both sides of the second pipe structure 220 in the bending direction of the insertion part 200, so that the segment pipe 230 can provide support for the second pipe structure 220 in the process of bending the insertion part 200.

[0083] In addition, in some embodiments, in the process of bending the insertion part 200, the structure forming the groove wall of the mounting groove 231 can be deformed in the direction away from each other under the action of the second pipe structure 220. This is beneficial to disperse the bending deformation of the second pipe structure 220 along the extension direction of the second pipe structure 220, and is beneficial to avoid excessive local bending curvature of the second pipe structure 220.

[0084] In some embodiments, the segment tube 230 can be formed by injection molding. For example, the segment tube 230 can be injection molded on the second tube structure 220. Specifically, the second tube structure 220 can be pre-embedded in a mold for injection molding, so that the second tube structure 220 can be connected to the segment tube 230 by injection molding. For example, the injection molded part can at least partially wrap the outer periphery of the second tube structure 220.

[0085] In addition, in the case where the segment tube 230 is a spiral tube, at least part of the injection molded segment tube 230 can be embedded in a groove formed on the outer surface of the spiral tube, so that the second tube structure 220 and the segment tube 230 are more reliably assembled, and the reliability of the bending part of the insertion part 200 is improved.

[0086] In some embodiments, the segment tube 230 and the second tube structure 220 are welded and / or bonded. The welding here can be a bonding or hot melt connection between non-metal structures, or between non-metal structures and metal structures, or can be welding between metal structures. Specifically, a mounting groove 231 can be prepared on the segment tube 230 in advance, and then the second tube structure 220 is assembled into the mounting groove 231. Finally, the segment tube 230 and the second tube structure 220 are fixed by welding or bonding process.

[0087] In some embodiments, the insertion part 200 includes a third tube structure 240, and the third tube structure 240 and the second tube structure 220 are arranged on opposite sides of the segment tube 230, so as to form a pivot structure between two adjacent segment tubes 230 by the third tube structure 240 and the second tube structure 220.

[0088] Referring to Figure 9 and Figure 10 , the insertion part 200 further includes a traction rope 250. The traction rope 250 is used to drive the bending of the insertion part 200. The segment tube 230 further includes a mounting hole 232, which is used to mount the traction rope 250 for driving the bending of the insertion part 200. The mounting hole 232 is arranged on at least one side of the first radial direction of the segment tube 230 along the axial direction of the segment tube 230, and the second tube structure 220 is arranged on one side of the second radial direction of the segment tube 230, and the first radial direction intersects the second radial direction.

[0089] Some embodiments of the present application also provide an endoscope. The endoscope has the same structure as the insertion part 200 disclosed in at least one embodiment of the present application, and can achieve the same or similar technical effects. Here, it is not described in detail.

[0090] Referring to Figure 1In some embodiments, the endoscope further comprises a handle 300. The handle 300 is exemplary a base structure member that can provide a mounting base for other components. The handle 300 is exemplary connected to the proximal end of the insertion portion 200, and the handle 300 is provided with a traction mechanism that can drive the relative rotation of the plurality of segment tubes 230 within the insertion portion 200. In this way, an operator can hold the handle 300 and operate the traction mechanism on the handle 300 to drive a segment of the plurality of segment tubes 230 within the insertion portion 200 to bend.

[0091] It should be noted that the terms "comprising," "including," and any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises a... " does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element. Additionally, it should be noted that the scope of the methods and apparatus of the embodiments are not limited by the order of the steps or the order of the components, and that the steps and components can be performed or implemented in different orders, or simultaneously, depending on the requirements of the particular implementation. Furthermore, features described with respect to certain examples can be combined in other examples.

[0092] The above description is only specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered by the protection scope of the present application.

Claims

1. An insertion portion characterized by, The insertion part can be used in an endoscope, and the insertion part comprises a first tube structure (210), a second tube structure (220) and a distal end structure (100), The distal end structure (100) has a first channel (101) and a second channel (102), At least part of the first channel (101) is intersected with the extension direction of the distal end structure (100), and the distal end of the first channel (101) at least partially penetrates the peripheral wall of the distal end structure (100); The second channel (102) is arranged along the extension direction of the distal end structure (100), the distal end of the second channel (102) penetrates the inner wall surface of the first channel (101) and communicates with the first channel (101), and the second channel (102) is used for accommodating an instrument; The first tube structure (210) communicates with the first channel (101), and the second tube structure (220) communicates with the second channel (102); The insertion part (200) further comprises a plurality of segment tubes (230), the plurality of segment tubes (230) are arranged in the extension direction of the second tube structure (220) and are fixed in the axial direction, the second tube structure (220) sequentially penetrates the segment tubes (230), and the two adjacent segment tubes (230) can rotate relative to each other with the second tube structure (220) therebetween as the support to realize the bending of the insertion part (200).

2. The insert of claim 1, wherein Along the extension direction of the distal end structure (100), the projection of the distal end of the first channel (101) on the distal end surface (103) of the distal end structure (100) is a first projection, along the extension direction of the distal end structure (100), the projection of the distal end of the second channel (102) on the distal end surface (103) of the distal end structure (100) is a second projection, the second projection is located in the first projection, and the instrument in the second channel (102) can enter the first channel (101) along the extension direction of the distal end structure (100) and pass out of the distal end structure (100) through the distal end of the first channel (101); And / or, the inner diameter of the first channel (101) is greater than the inner diameter of the second channel (102); And / or, the first channel (101) comprises an inclined section (1011) and an extension section (1012) in communication with the proximal end of the inclined section (1011), the inclined section (1011) is intersected with the extension direction of the distal end structure (100), the extension section (1012) extends to the proximal end of the distal end structure (100) along the extension direction of the distal end structure (100), the flow area of the inclined section (1011) is smaller than the flow area of the extension section (1012), or the distal end of the second channel (102) penetrates the inner wall surface of the inclined section (1011).

3. The insert portion according to claim 1 or 2, characterized in that The distal structure (100) comprises a camera module (110) and a mounting seat (120), the camera module (110) is arranged at the distal end of the mounting seat (120), the first channel (101) and the second channel (102) are arranged in the mounting seat (120), and the proximal end of the camera module (110) is at least partially opposite to the first channel (101) in the extension direction of the distal structure (100).

4. The insert of claim 3, wherein The proximal end of the first channel (101) is arranged along the extension direction of the distal structure (100), and the projection of the proximal end of the first channel (101) on the distal face (103) of the distal structure (100) at least partially overlaps the projection of the camera module (110) on the distal face (103) of the distal structure (100) in the extension direction of the distal structure (100); And / or, the camera module (110) is located on the side of the first channel (101) away from the second channel (102); And / or, the distal structure (100) further has a third channel (104), the third channel (104) is located on the side of the camera module (110) away from the first channel (101), and the third channel (104) penetrates through the distal structure (100) along the extension direction of the distal structure (100); And / or, the projection of the camera module (110) on the distal face of the distal structure (100) is spaced apart or tangent to the projection of the distal end of the second channel (102) on the distal face of the distal structure (100) in the extension direction of the distal structure (100).

5. The insert of claim 4, wherein The distal end of the mounting seat (120) has a tapered portion (121), and the distal end of the first channel (101) at least partially penetrates the side wall (1211) of the tapered portion (121).

6. The insert of claim 5, wherein The distal end of the tapered portion (121) is eccentrically arranged to the side away from the distal end of the first channel (101) relative to the proximal end of the tapered portion (121); And / or, the projection of the camera module (110) on the distal end face of the tapered portion (121) is located within the distal end face of the tapered portion (121) in the extension direction of the distal structure (100); And / or, the second channel (102) is used for accommodating an instrument (400), the inner diameter of the second channel (102) is adapted to the outer diameter of the instrument (400), and the second channel (102) is in sliding fit with the instrument (400); And / or, the inner diameter of the second channel (102) is smaller than the inner diameter of the first channel (101); And / or, the distal end of the third channel (104) at least partially penetrates the side wall (1211) of the tapered portion (121); And / or, the inner diameter of the third channel (104) is smaller than the inner diameter of the first channel (101); And / or, the radial dimension of the tapered portion (121) gradually decreases in the direction from the proximal end of the mounting seat (120) to the distal end of the mounting seat (120). And / or, the cross section of the taper portion (121) is at least one of a circle, an ellipse, and a polygon. And / or, the outer peripheral wall of the distal end structure (100) is provided with an avoiding groove (105) extending along the extension direction of the distal end structure (100), and one end of the avoiding groove (105) communicates with the first channel (101), and the other end of the avoiding groove (105) penetrates the outer peripheral wall and / or the distal end face (103) of the distal end structure.

7. The insert of claim 1, wherein The outer peripheral wall or the inner side wall of the segment tube (230) is provided with a mounting groove (231), and the first tube structure (210) is embedded in the mounting groove (231), and in the case that the mounting groove (231) is arranged on the outer peripheral wall of the segment tube (230), the first tube structure (210) does not protrude from the outer peripheral wall of the segment tube (230).

8. An endoscope characterized by comprising: The insertion portion according to any one of claims 1 to 7.

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