Endoscope and focusing assembly thereof

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to an endoscope and a focusing assembly thereof. The focusing assembly comprises a lens base, an optical lens and a driving part, the optical lens and the driving part are both arranged on the lens base, the lens base is used for being connected with the far end of an insertion part of the endoscope, the optical lens can be opposite to a camera module at the far end of the insertion part, the light-in side of the optical lens can face a to-be-framed body, and the light-out side of the optical lens can face the camera module. The driving part can drive the optical lens to move in the direction close to or away from the camera module. According to the embodiment of the invention, the optical lens is additionally arranged at the far end of the camera module, and the optical lens can change the light propagation path in the moving process, so that the focal length of the camera module can be changed, the light can be accurately gathered on the image sensor of the camera module, and the camera module can obtain a clearer image; therefore, operators and doctors can observe human tissues or focuses to wait for view finding.

Description

Technical Field

[0001] The present application belongs to the technical field of medical devices, and specifically relates to an endoscope and a focusing component thereof. Background Art

[0002] When diagnosing and treating lesions in the patient's body, an endoscope is usually required. The endoscope includes an operating handle and an insertion part. During specific operations, the insertion part can enter the human body through a surgical incision or a natural cavity of the human body to observe human tissues or lesions.

[0003] Generally speaking, a camera module is provided at the far end of the insertion part, through which the internal tissues or lesions of the human body can be observed. However, the focal length of the current camera module is a fixed value, so the clarity of the framing image obtained by the camera module is low, which is not conducive to the surgeon observing the human tissues or lesions waiting for the framing object. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide an endoscope and a focusing assembly thereof, which can solve the problem of low clarity of the framing image obtained by the current endoscope.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a focusing assembly of an endoscope, including a lens seat, an optical lens, and a driving member, wherein the optical lens and the driving member are both arranged on the lens seat, and the lens seat is used to be connected to the distal end of the insertion portion of the endoscope,

[0007] The optical lens can be opposite to the camera module at the far end of the insertion part, the light incident side of the optical lens can face the object to be viewed, and the light exit side of the optical lens can face the camera module. The driving member can drive the optical lens to move in a direction close to or away from the camera module.

[0008] In a second aspect, an embodiment of the present application provides an endoscope, comprising an insertion portion and a focusing assembly as described above, wherein a lens seat is connected to a distal end of the insertion portion.

[0009] In the embodiment of the present application, the focusing assembly includes a lens seat, an optical lens and a driving member arranged on the lens seat. When the focusing assembly of the present application is used specifically, the lens seat can be connected to the distal end of the insertion part, and the optical lens can be opposite to the camera module of the insertion part. At this time, the light-emitting side of the optical lens faces the camera module, so the light-incoming side of the optical lens faces the human tissue to be framed or the lesion waiting to be framed can be framed. It can be seen that the embodiment of the present application adds an optical lens at the distal end of the camera module, so that the optical lens can be used as a part of the lens of the camera module, and the driving member can drive the optical lens to move in the direction of approaching or moving away from the camera module. Since the optical lens changes the light propagation path during the movement, it will change the focal length of the camera module, so that the light is accurately focused on the image sensor of the camera module, and then the camera module obtains a clearer image, which is beneficial for the operator to observe the human tissue or lesion waiting to be framed. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 A schematic diagram of a partial structure of the focusing assembly disclosed in the embodiment of the present application Figure 1 ;

[0011] Figure 2 A schematic diagram of a partial structure of the focusing assembly disclosed in the embodiment of the present application Figure 2 ;

[0012] Figure 3 A cross-sectional view of the mirror holder disclosed in the embodiment of the present application;

[0013] Figures 4 to 6 Schematic diagram of the assembly of the insertion portion and the adjustment component disclosed in the embodiment of the present application at different viewing angles.

[0014] Description of reference numerals:

[0015] 100, mirror base; 101, first through hole; 102, second through hole; 103, third through hole; 110, open end; 120, closed end; 130, positioning protrusion; 140, groove; 150, rigid seat; 160, elastic sleeve; 200, optical lens; 300, driving member; 310, traction rope; 320, elastic reset member; 400, light guide; 500, insertion part; 510, instrument channel; 520, camera module. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0017] The terms "first", "second", etc. 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 interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0018] The endoscope and focusing assembly thereof provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0019] In each embodiment of the present application, "proximal end" and "distal end" refer to the position of the endoscope and its components relative to the user in the use environment, 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".

[0020] like Figures 1 to 6 As shown, the embodiment of the present application discloses a focusing assembly of an endoscope, including a lens holder 100, an optical lens 200 and a driving member 300. The optical lens 200 and the driving member 300 are both arranged on the lens holder 100, and the lens holder 100 is used to be connected to the distal end of the insertion portion 500 of the endoscope. Optionally, the optical lens 200 here can be a convex lens, or the optical lens 200 can also be other lenses that can cooperate with the lens of the camera module 520 to change the focal length of the camera module 520.

[0021] The optical lens 200 can be opposite to the camera module 520 at the far end of the insertion part 500, the light incident side of the optical lens 200 can face the object to be framed, and the light emitting side of the optical lens 200 can face the camera module 520. The driving member 300 can drive the optical lens 200 to move in a direction close to or away from the camera module 520. In the embodiment of the present application, the focusing assembly includes a lens holder 100, and the optical lens 200 and the driving member 300 provided on the lens holder 100. When the focusing assembly of the present application is specifically used, the lens holder 100 can be connected to the far end of the insertion part 500, and the optical lens 200 can be opposite to the camera module 520 of the insertion part 500. At this time, the light emitting side of the optical lens 200 faces the camera module 520, so that the light incident side of the optical lens 200 faces the human tissue or lesion to be framed, and the frame can be framed. It can be seen that the embodiment of the present application adds an optical lens 200 at the far end of the camera module 520, so that the optical lens 200 can be used as a part of the lens of the camera module 520, and the driving component 300 can drive the optical lens 200 to move in a direction close to or away from the camera module 520. Since the optical lens 200 will change the light propagation path during the movement, it will change the focal length of the camera module 520, so that the light can be accurately focused on the image sensor of the camera module 520, and the camera module 520 can obtain a clearer image, which is beneficial for the surgeon to observe human tissue or lesions and wait for the viewfinder.

[0022] In addition, compared to controlling the movement of the lens in the camera module 520 to adjust the focal length of the camera module 520, this embodiment additionally sets a lens holder 100 with an optical lens 200 on the insertion part 500, and can control the movement of the optical lens 200 to achieve the purpose of adjusting the focal length of the camera module 520, thereby preventing the lens assembly from being worn and damaged.

[0023] It should be noted that the focusing assembly of the present application is applicable to hard lenses and soft lenses, especially to hard lenses. When the focusing assembly of the present application is arranged on a soft lens, since the friction force generated by the driving member 300 of the present application in the process of driving the optical lens 200 to move is relatively small, the active bending section of the soft lens will not bend during the movement of the optical lens 200.

[0024] In some embodiments, the driving member 300 may be directly connected to the optical lens 200. In this case, the lens holder 100 may be fixedly disposed at the distal end of the insertion portion 500, and the driving member 300 may drive the optical lens 200 to move relative to the lens holder 100, so that the optical lens 200 is close to or away from the camera module 520. In another embodiment, the lens holder 100 may be slidably matched with the distal end of the insertion portion 500, and the driving member 300 includes a traction rope 310, the distal end of which is fixedly connected to the lens holder 100, and the proximal end of the traction rope 310 may drive the lens holder 100 to move in a direction close to the distal end of the insertion portion 500. In this embodiment, the driving member 300 includes a traction rope 310, which is directly connected to the lens holder 100 and thus indirectly connected to the optical lens 200. When the focusing assembly of the present application is used, the lens holder 100 is slidably matched with the distal end of the insertion portion 500. The lens holder 100 can be pulled by the traction rope 310 to move the lens holder 100 in a direction close to the distal end of the insertion portion 500, thereby moving the lens in a direction close to the camera module 520, so as to adjust the focal length of the camera module 520 and accurately focus the light on the image sensor. It can be seen that the present application controls the movement of the lens holder 100 by pulling the traction rope 310 to achieve focusing, and the traction rope 310 can be manually pulled, so there is no need to set an additional driving source to drive the lens holder 100 to move, which can not only save the production cost of the focusing assembly, but also simplify the control logic of the focusing assembly and simplify its operation difficulty. In addition, the traction rope 310 of the present application is connected to the mirror base 100. Since the size of the mirror base 100 is larger than the size of the optical lens 200, the area on the mirror base 100 that can be used to connect the traction rope 310 is larger, which makes it easier to install the traction rope 310. This embodiment can also prevent the optical lens 200 from moving relative to the mirror base 100, thereby preventing the optical lens 200 from being worn and damaged.

[0025] Of course, the driving member 300 can also be an ultrasonic motor driving a screw nut mechanism, a gear rack mechanism, a connecting rod mechanism or other driving components. The present application does not limit the specific structure of the driving member 300.

[0026] Since the traction rope 310 can only drive the mirror base 100 to move in the direction close to the distal end of the insertion portion 500, after the traction rope 310 drives the mirror base 100 to move in the direction close to the distal end of the insertion portion 500, the driving member 300 can no longer drive the mirror base 100 to move in the direction away from the distal end of the insertion portion 500, which will limit the use scenario of the endoscope. Therefore, in an optional embodiment, please refer to Figure 2 and Figure 6The driving member 300 further includes an elastic reset member 320, the distal end of which is connected to the lens holder 100, and the proximal end of which can be connected to the distal end of the insertion portion 500. The elastic reset member 320 is used to drive the lens holder 100 to move in a direction away from the distal end of the insertion portion 500. In this embodiment, the driving member 300 further includes an elastic reset member 320. When the focusing assembly of the present application is used in a specific application, the two ends of the elastic reset member 320 are respectively connected to the distal ends of the lens holder 100 and the insertion portion 500. When the traction rope 310 is pulled to move the lens holder 100 toward the distal end of the insertion portion 500, the elastic reset member 320 undergoes elastic deformation. When the lens holder 100 needs to be moved away from the distal end of the insertion portion 500, the traction rope 310 is released, and the elastic reset member 320 restores the elastic deformation to drive the lens holder 100 to move away from the distal end of the insertion portion 500. It can be seen that in this embodiment, the elastic reset member 320 can drive the mirror holder 100 to move in a direction away from the front end of the insertion portion 500, so that the endoscope can adapt to more scenarios, such as scenarios where the movement of the mirror holder 100 needs to be reciprocated to complete the focusing, or scenarios where multiple objects to be viewed need to be framed in the same detection, thereby requiring multiple focusing adjustments.

[0027] It should be noted that when the endoscope of the present application is a soft endoscope, since the mass of the endoscope base 100 of the present application is relatively small, the elastic force required for the elastic return member 320 to drive the endoscope base 100 to return to its original position is also smaller. In this way, an elastic return member 320 that is easy to deform can be selected, so that the external force exerted on the elastic return member 320 when it is deformed is smaller. Therefore, when the traction rope 310 pulls the endoscope base 100 to move and causes the elastic return member 320 to deform, it will not cause the active bending section of the soft endoscope to bend.

[0028] Optionally, the elastic reset member 320 may be a spring, a spring, an elastic sleeve, etc. Of course, the driving member 300 may also only include the traction rope 310 without the elastic reset member 320 , and the driving member 300 drives the optical lens 200 to move in a direction close to the camera module 520 .

[0029] In an optional embodiment, the driving member 300 further includes a traction wheel (not shown in the figure), which can be disposed on an operating handle of the endoscope (not shown in the figure) and can rotate relative to the operating handle. The proximal end of the traction rope 310 can pass through the instrument channel 510 of the insertion portion 500 and be connected to the traction wheel. The rotation of the traction wheel can pull the traction rope 310 to move the lens holder 100 in a direction close to the distal end of the insertion portion 500. In this embodiment, the driving member 300 further includes a traction wheel. When the focusing assembly of the present application is specifically used, the traction wheel is rotatably disposed on the operating handle. The proximal end of the traction rope 310 is connected to the operating handle. Therefore, rotating the traction wheel can Pulling the traction rope 310 drives the mirror holder 100 to move toward the distal end of the insertion portion 500. Compared with the previous embodiment, pulling the traction rope 310 in this embodiment is more convenient. In addition, this embodiment also uses the instrument channel 510 in the insertion portion 500 to pass the traction rope 310, so there is no need to set up an additional passing channel, thereby simplifying the structure of the endoscope. It should be noted that there are many ways to control the rotation of the traction wheel, such as by setting a lever on the traction wheel and manually turning the lever to rotate the traction wheel; or by exposing a part of the traction wheel to the handle housing, and manually turning the part of the traction wheel exposed to the handle housing to rotate the traction wheel.

[0030] Of course, in some embodiments, the driving member 300 may not include a traction wheel. In this case, the proximal end of the traction rope 310 can be inserted into the operating handle through the instrument channel 510 of the insertion portion 500 and pass out from the operating handle. In this case, the proximal end of the traction rope 310 can be used as the operating end. The surgeon can pull the proximal end of the traction rope 310 to move the mirror holder 100 in a direction close to the camera module 520.

[0031] In an optional embodiment, the lens holder 100 is a cylindrical member, and the lens holder 100 has an open end 110 and a closed end 120 that are arranged opposite to each other. The open end 110 can be slidably mounted on the outside of the distal end of the insertion part 500, and the end wall of the closed end 120 is provided with a first through hole 101 that penetrates the end wall, that is, the first through hole 101 penetrates the end wall along the thickness direction of the end wall, and at least part of the optical lens 200 is arranged in the first through hole 101. In this embodiment, the lens holder 100 is a cylindrical member with one end open and the other end closed. In specific use, the open end 110 of the lens holder 100 is mounted on the outside of the distal end of the insertion part 500, that is, the distal end of the insertion part 500 is wrapped in the lens holder 100, and the distal end of the insertion part 500 is provided with components such as the camera module 520, so the lens holder 100 can provide protection for the components at the distal end of the insertion part 500, thereby preventing the components in the distal end of the insertion part 500 from being damaged. Of course, the mirror base 100 can also be an L-shaped component, an n-shaped component, etc., and this application does not limit the shape and structure of the mirror base 100; the mirror base 100 can be connected to the distal end of the insertion part 500 by means of snap connection, threaded connection, screw connection, etc.

[0032] In some endoscopes, a light source module is also provided at the distal end of the endoscope to provide lighting for the camera module 520. In order to prevent the end wall of the closed end 120 of the lens holder 100 from blocking the light emitted by the light source module, in an optional embodiment, a second through hole 102 is also provided on the end wall of the closed end 120, that is, the second through hole 102 penetrates the end wall along the thickness direction of the end wall, and the first through hole 101 and the second through hole 102 are spaced apart, and the second through hole 102 can correspond to the light source module of the insertion part 500. In this embodiment, the end wall of the closed end 120 is further provided with a second through hole 102, and the second through hole 102 may correspond to the light source module, so that the light emitted by the light source module may pass through the second through hole 102 to illuminate the object to be viewed; of course, in the case where the lens holder 100 is a cylindrical member, the portion of the end wall of the closed end 120 corresponding to the light source module may also be made of a transparent material, so that the lens holder 100 may be prevented from blocking the light emitted by the light source module. It should be noted that, in the case where the lens holder 100 is an L-shaped member or an n-shaped member, the lens holder 100 may be misaligned with the light source module and the instrument channel 510 described below, so as to prevent the lens holder 100 from blocking the light source module and the instrument channel 510.

[0033] And / or, in an optional embodiment, the end wall of the closed end 120 is further provided with a third through hole 103 penetrating the end wall, the first through hole 101 and the third through hole 103 are arranged at intervals, and the third through hole 103 may correspond to and communicate with the instrument channel 510 of the insertion portion 500. In this embodiment, the end wall of the closed end 120 is further provided with a third through hole 103, and the third through hole 103 may correspond to the instrument channel 510. At this time, the third through hole 103 is communicated with the instrument channel 510, so that surgical instruments can pass through the instrument channel 510 and the third through hole 103 from the endoscope to perform surgical operations.

[0034] In order to prevent the light emitted from the light source module from being emitted by irradiating the inner wall of the second through hole 102, thereby reducing the irradiation effect of the light source module, in an optional embodiment, the focusing assembly further includes a light guide 400, at least part of which is disposed in the second through hole 102. In this embodiment, the light guide 400 is disposed in the second through hole 102, and the light guide 400 is used to guide the light emitted by the light source module, so that the light is more converged, so as to prevent the light from irradiating the inner wall of the second through hole 102, thereby solving the problem of reducing the irradiation effect of the light source module.

[0035] And / or, in an optional embodiment, a ring-shaped positioning protrusion 130 is protrudingly provided on the inner end surface of the end wall of the closed end 120, the central axis of the positioning protrusion 130 deviates from the central axis of the mirror holder 100, the positioning protrusion 130 is arranged around the third through hole 103, the positioning protrusion 130 can be positioned and inserted into the instrument channel 510, and the third through hole 103 is connected to the instrument channel 510 through the accommodating space in the positioning protrusion 130. In this embodiment, the inner end surface of the closed end 120 is protrudingly provided with an annular positioning protrusion 130. Since the central axis of the positioning protrusion 130 deviates from the central axis of the lens holder 100, and in the process of assembling the lens holder 100 to the distal end of the insertion portion 500, the positioning protrusion 130 needs to be positioned and inserted into the instrument channel 510, and the open end 110 needs to be sleeved on the outside of the insertion portion 500, after the positioning protrusion 130 is positioned and inserted into the instrument channel 510, the position of the lens holder 100 is unique and cannot be rotated relative to the distal end of the endoscope, that is, after the positioning protrusion 130 is positioned and inserted into the instrument channel 510, the lens holder 100 is in a unique position and cannot be rotated relative to the distal end of the endoscope. After that, the third through hole 103 corresponds to the instrument channel 510, and the first through hole 101 corresponds to the camera module 520, so there is no need to adjust the position of the lens holder 100, thereby reducing the difficulty of assembling the lens holder 100; and the lens holder 100 of this embodiment cannot rotate relative to the distal end of the insertion part 500, which can improve the docking stability between the lens holder 100 and the distal end of the insertion part 500, thereby preventing the lens holder 100 from rotating relative to the distal end of the insertion part 500 during the use of the endoscope, thereby preventing the first through hole 101 from being misaligned with the camera module 520, and preventing the third through hole 103 from being misaligned with the instrument channel 510.

[0036] In specific use, the mirror base 100 is slidably sleeved on the distal end of the insertion part 500, that is, the inner circumference of the mirror base 100 will slide and fit with the outer circumference of the insertion part 500. In order to make the mirror base 100 easier to move relative to the insertion part 500, in an optional embodiment, the inner circumference of the mirror base 100 is provided with a groove 140, the groove 140 extends along the circumference of the mirror base 100, the groove 140 can be arranged around the distal end of the insertion part 500, and there is a gap between the bottom wall of the groove 140 and the outer circumference of the distal end of the insertion part 500, where the bottom wall of the groove 140 is opposite to the notch of the groove 140. In this embodiment, the inner circumference of the mirror base 100 is provided with a groove 140, and the groove 140 can be arranged around the distal end of the insertion part 500, so that the contact area between the inner circumference of the mirror base 100 and the outer circumference of the insertion part 500 can be reduced, so that the mirror base 100 can be easier to move relative to the insertion part 500.

[0037] In an optional embodiment, the mirror base 100 includes a rigid base 150 and an elastic sleeve 160, the elastic sleeve 160 is a tubular member and has a closed portion and an open portion arranged opposite to each other, the rigid base 150 is enclosed within the elastic sleeve 160, and the rigid base 150 is attached to the inner end surface of the closed portion, the rigid base 150 and the closed portion cooperate to form a closed end 120, and the open end 110 is an open portion. In this embodiment, the lens holder 100 includes a rigid seat 150 and an elastic sleeve 160, and the open portion of the elastic sleeve 160 is an open end 110, that is, the elastic sleeve 160 of the present application can be set on the outside of the distal end of the insertion part 500 by using its own elastic force, so that there is no need to process buckles, threads, threaded holes and other structures on the lens holder 100 and the distal end of the insertion part 500, thereby simplifying the structure of the lens holder 100 and the distal end of the insertion part 500; in addition, the elastic sleeve 160 is coated on the outside of the rigid seat 150, and the texture of the elastic sleeve 160 is relatively soft, so the risk of contact between the lens holder 100 and human tissue and thus causing damage to human tissue can be reduced; in addition, the rigid seat 150 has a large rigidity, so the rigid seat 150 can be used as the installation base of the optical lens 200, thereby improving the installation stability of the optical lens 200. Of course, the lens holder 100 can also be a completely rigid structure, and this application is not limited to this; the elastic sleeve 160 here can be a silicone sleeve, a rubber sleeve, etc.

[0038] In order to improve the connection strength between the rigid seat 150 and the elastic sleeve 160, in an optional embodiment, the rigid seat 150 includes a relatively bent main body and a flange portion, the flange portion extends toward the open portion, the main body is attached to the inner end surface of the closed portion, and the flange portion is attached to the inner circumferential surface of the elastic sleeve 160. In this embodiment, the rigid seat 150 includes a relatively bent main body and a flange portion, the flange portion is attached to the inner circumferential surface of the elastic sleeve 160. Compared with the flat rigid seat 150, this embodiment can increase the surface area of ​​the rigid seat 150 through the flange portion, thereby increasing the contact area between the rigid seat 150 and the elastic sleeve 160, and further improving the connection strength between the rigid seat 150 and the elastic sleeve 160.

[0039] The embodiment of the present application also discloses an endoscope, including an insertion portion 500 and a focusing assembly as described in any of the above embodiments, and the lens holder 100 is connected to the distal end of the insertion portion 500. The endoscope referred to in the embodiment of the present application can be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, an enteroscope, an otoscope, a rhinoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc., and the embodiment of the present application does not specifically limit the type of the endoscope.

[0040] The above embodiments of the present application focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here. The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present application, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present application and the claims, all of which are within the protection of the present application.

Claims

1. A focusing assembly for an endoscope, characterized in that: The endoscope comprises a lens base (100), an optical lens (200) and a driving member (300), wherein the optical lens (200) and the driving member (300) are both arranged on the lens base (100), and the lens base (100) is used to be connected to the distal end of an insertion portion (500) of an endoscope. The optical lens (200) may be opposite to the camera module (520) at the far end of the insertion portion (500), the light incident side of the optical lens (200) may face the object to be viewed, and the light emitting side of the optical lens (200) may face the camera module (520), and the driving member (300) may drive the optical lens (200) to move in a direction approaching or away from the camera module (520).

2. The focusing assembly according to claim 1, characterized in that: The mirror base (100) can be slidably matched with the distal end of the insertion part (500), and the driving member (300) includes a traction rope (310), the distal end of the traction rope (310) is fixedly connected to the mirror base (100), and traction of the proximal end of the traction rope (310) can drive the mirror base (100) to move in a direction close to the distal end of the insertion part (500).

3. The focusing assembly according to claim 2, characterized in that: The driving member (300) further comprises an elastic reset member (320), the distal end of the elastic reset member (320) being connected to the mirror base (100), the proximal end of the elastic reset member (320) being connectable to the distal end of the insertion portion (500), and the elastic reset member (320) being used for driving the mirror base (100) to move in a direction away from the distal end of the insertion portion (500).

4. The focusing assembly according to claim 2, characterized in that: The driving member (300) further comprises a traction wheel, which can be arranged on an operating handle of the endoscope and can rotate relative to the operating handle. The proximal end of the traction rope (310) can pass through the instrument channel (510) of the insertion portion (500) and be connected to the traction wheel. The rotation of the traction wheel can pull the traction rope (310) so that the mirror base (100) moves in a direction close to the distal end of the insertion portion (500).

5. The focusing assembly according to claim 2, characterized in that: The lens holder (100) is a cylindrical member, and has an open end (110) and a closed end (120) arranged opposite to each other, the open end (110) can be slidably mounted on the outside of the distal end of the insertion portion (500), and a first through hole (101) penetrating the closed end (120) is provided on the end wall of the closed end, and at least a part of the optical lens (200) is arranged in the first through hole (101).

6. The focusing assembly according to claim 5, characterized in that: The end wall of the closed end (120) is further provided with a second through hole (102) penetrating the closed end (120), the first through hole (101) and the second through hole (102) are arranged at intervals, and the second through hole (102) can correspond to the light source module of the insertion part (500); and / or, the end wall of the closed end (120) is further provided with a third through hole (103) penetrating the closed end (120), the first through hole (101) and the third through hole (103) are arranged at intervals, and the third through hole (103) can correspond to and be in communication with the instrument channel (510) of the insertion part (500).

7. The focusing assembly according to claim 6, characterized in that: The focusing assembly further comprises a light guide (400), at least a portion of the light guide (400) being arranged in the second through hole (102); and / or, An annular positioning protrusion (130) is protrudingly provided on the inner end surface of the end wall of the closed end (120); the central axis of the positioning protrusion (130) deviates from the central axis of the mirror holder (100); the positioning protrusion (130) is arranged around the third through hole (103); the positioning protrusion (130) can be positioned and inserted into the instrument channel (510); and the third through hole (103) is connected to the instrument channel (510) via the accommodating space in the positioning protrusion (130).

8. The focusing assembly according to claim 5, characterized in that: The inner circumferential surface of the mirror base (100) is provided with a groove (140), and the groove (140) extends along the circumference of the mirror base (100). The groove (140) can be arranged around the distal end of the insertion part (500), and there is a distance between the bottom wall of the groove (140) and the outer circumferential surface of the distal end of the insertion part (500).

9. The focusing assembly according to any one of claims 5 to 8, characterized in that: The mirror base (100) comprises a rigid base (150) and an elastic sleeve (160); the elastic sleeve (160) is a tubular member and has a closed portion and an open portion disposed opposite to each other; the rigid base (150) is enclosed within the elastic sleeve (160), and the rigid base (150) is attached to the inner end surface of the closed portion; the rigid base (150) and the closed portion cooperate to form the closed end (120), and the open end (110) is the open portion.

10. An endoscope, characterized in that: It comprises an inserting part (500) and a focusing assembly according to any one of claims 1 to 9, wherein the lens holder (100) is connected to the distal end of the inserting part (500).

Images