Endoscope and expansion mirror and insertion assembly thereof
By adding an enlarged lens to the distal end of the insertion part of the endoscope, changing the light propagation path and increasing the focal length of the camera module, the problem that the existing endoscope cannot adapt to the high proportion of the framing body is solved, and effective observation of the framing body of the seriously ill patient is achieved.
Patent Information
- Application Number
- CN202421132043.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-23
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-05-23
AI Technical Summary
Existing endoscopes cannot adapt to scenes where the proportion of the framing object in the framing image is relatively high, especially when observing the framing object of a seriously ill patient.
By adding an extended mirror at the distal end of the insertion part of the endoscope, including a mirror seat and an magnifying lens, the magnifying lens is opposite to the camera module, changing the light propagation path, increasing the focal length of the camera module, and reducing the viewing field, thereby increasing the proportion of the to-be-filled object in the framing image.
This enables the endoscope to adapt to scenes where the proportion of the framing object in the framing image is relatively high, so that doctors can observe internal tissues or lesions waiting for the framing object.
Smart Images
Figure CN222722985U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of medical devices, and specifically relates to an endoscope and its expansion scope and insertion component. 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 operation, by controlling the operating handle, the active bending section at the distal end of the insertion part can be pulled by a traction rope to achieve bending action, thereby changing the direction of the distal end of the insertion part.
[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 viewing field of the current camera module is large, so the proportion of the object to be viewed in the viewing image obtained by the camera module is small. Therefore, the current endoscope cannot be adapted to the scene where the proportion of the object to be viewed in the viewing image is required to be large, such as observing the object to be viewed of a seriously ill patient. Utility Model Content
[0004] The purpose of the embodiments of the present application is to provide an endoscope and its expansion mirror and insertion component, which can solve the problem that the current endoscope cannot adapt to the scene that requires the view object to occupy a large proportion in the view image.
[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 an expansion lens of an endoscope, comprising a lens seat and a magnifying lens, wherein the magnifying lens is disposed on the lens seat, and the lens seat can be detachably connected to the distal end of the insertion portion of the endoscope,
[0007] When the lens holder is connected to the distal end of the insertion part, the magnifying lens is opposite to the camera module of the insertion part, and the light emitting side of the magnifying lens faces the camera module.
[0008] In a second aspect, an embodiment of the present application provides an insertion assembly of an endoscope, comprising an insertion portion and the above-mentioned expansion scope.
[0009] In a third aspect, an embodiment of the present application provides an endoscope comprising the above-mentioned insertion assembly.
[0010] In the embodiment of the present application, the expansion mirror includes a lens holder and a magnifying lens, and the magnifying lens is arranged on the lens holder. When the expansion mirror of the embodiment of the present application is specifically applied, the lens holder can be connected to the distal end of the insertion part of the endoscope, and the magnifying lens can be opposite to the camera module at the distal end of the insertion part. At this time, the light-emitting side of the magnifying lens faces the camera module, so the light-incoming side of the magnifying lens faces the object to be viewed for framing. It can be seen that the embodiment of the present application adds a magnifying lens at the distal end of the camera module, so that the magnifying lens can be used as a part of the lens of the camera module, which will change the light propagation path, thereby increasing the focal length of the camera module, and then reducing the framing field of the camera module, so as to increase the proportion of the object to be viewed in the framing image, so that the current endoscope is adapted to the scene that requires a larger proportion of the object to be viewed in the framing image, so as to facilitate the doctor to observe the internal tissue or lesion waiting for the framing object. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 A schematic diagram of the structure of an extended mirror disclosed in an embodiment of the present application;
[0012] Figure 2 A cross-sectional view of an extended mirror disclosed in an embodiment of the present application;
[0013] Figure 3 For this application Figure 2 The enlarged schematic diagram of point A in the middle;
[0014] Figure 4 For this application Figure 2 The enlarged schematic diagram of point B in the middle;
[0015] Figure 5 It is a structural schematic diagram of the mirror holder disclosed in the embodiment of the present application;
[0016] Figure 6 It is a cross-sectional view of a partial structure of the insertion component disclosed in an embodiment of the present application.
[0017] Description of reference numerals:
[0018] 100, mirror base; 101, first through hole; 102, second through hole; 103, third through hole; 104, avoidance; 105, first hole section; 106, second hole section; 107, step surface; 110, open end; 120, closed end; 130, positioning protrusion; 140, rigid seat; 141, main body; 142, flanged portion; 150, elastic sleeve; 151, accommodating groove; 200, magnifying lens; 300, light guide; 400, insertion portion; 410, camera module; 420, instrument channel. DETAILED DESCRIPTION
[0019] 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.
[0020] 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.
[0021] The endoscope and its extension mirror and insertion component provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in combination with the accompanying drawings.
[0022] 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".
[0023] like Figures 1 to 5 As shown, the embodiment of the present application discloses an expansion scope of an endoscope, including a lens holder 100 and a magnifying lens 200, wherein the magnifying lens 200 is disposed on the lens holder 100, and the lens holder 100 can be detachably connected to the distal end of the insertion portion 400 of the endoscope, and when the lens holder 100 is connected to the distal end of the insertion portion 400, the magnifying lens 200 is opposite to the camera module 410 of the insertion portion 400, and the light emitting side of the magnifying lens 200 faces the camera module 410. Optionally, the magnifying lens 200 here can be a lens such as a convex lens that can magnify the object to be viewed.
[0024] In the embodiment of the present application, the expansion mirror includes a lens holder 100 and a magnifying lens 200. The magnifying lens 200 is arranged on the lens holder 100. When the expansion mirror of the embodiment of the present application is specifically applied, the lens holder 100 can be connected to the distal end of the insertion portion 400 of the endoscope, and the magnifying lens 200 is made to face the camera module 410 at the distal end of the insertion portion 400. At this time, the light emitting side of the magnifying lens 200 is facing the camera module 410, so the light incident side of the magnifying lens 200 is made to face the object to be viewed for framing. It can be seen that the embodiment of the present application adds a magnifying lens 200 at the far end of the camera module 410, so that the magnifying lens 200 can be used as a part of the lens of the camera module 410, which will change the light propagation path, thereby increasing the focal length of the camera module 410, and then reducing the field of view of the camera module 410, so as to increase the proportion of the object to be viewed in the viewed image, so that the current endoscope is adapted to the scene that requires a larger proportion of the object to be viewed in the viewed image, thereby facilitating the doctor to observe the internal tissues or lesions waiting for the view object.
[0025] It should be noted that, in the scenario where the proportion of the viewfinder in the viewfinder image is not required to be large, the extension mirror can be removed from the insertion part 400; in the scenario where the proportion of the viewfinder in the viewfinder image is not required to be large, the extension mirror can be connected to the insertion part 400.
[0026] 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 arranged back to back, the open end 110 can be sleeved on the outside of the distal end of the insertion part 400, 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, at least a part of the magnifying lens 200 is arranged in the first through hole 101, and when the lens holder 100 is connected to the distal end of the insertion part 400, the first through hole 101 corresponds to the camera module 410. 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 sleeved on the outside of the distal end of the insertion part 400, that is, the distal end of the insertion part 400 is wrapped in the lens holder 100, and the distal end of the insertion part 400 is provided with components such as the camera module 410, so the lens holder 100 can provide protection for the components at the distal end of the insertion part 400, thereby preventing the components in the distal end of the insertion part 400 from being damaged. Of course, the lens holder 100 can also be an L-shaped component, an n-shaped component, etc., and the present application does not limit the shape and structure of the lens holder 100; the lens holder 100 can be connected to the distal end of the insertion part 400 by means of snap connection, threaded connection, screw connection, etc.
[0027] In some endoscopes, a light source module is also provided at the distal end of the endoscope to provide lighting for the camera module 410. 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. When the lens holder 100 is connected to the distal end of the insertion part 400, the second through hole 102 corresponds to the light source module of the insertion part 400. 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 component or an n-shaped component, the lens holder 100 may be misaligned with the light source module and the instrument channel 420 described below, so as to prevent the lens holder 100 from blocking the light source module and the instrument channel 420.
[0028] And / or, in some endoscopes, the insertion portion 400 of the endoscope is further provided with an instrument channel 420, so as to facilitate the surgical instrument to enter the human body. In order to prevent the end wall of the closed end 120 of the mirror base 100 from blocking the instrument channel 420, in an optional embodiment, the end wall of the closed end 120 is further provided with a third through hole 103 that penetrates the end wall, and the first through hole 101 and the third through hole 103 are arranged at intervals. When the mirror base 100 is connected to the distal end of the insertion portion 400, the third through hole 103 corresponds to and communicates with the instrument channel 420 of the insertion portion 400. 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 can correspond to the instrument channel 420. At this time, the third through hole 103 is communicated with the instrument channel 420, so that the surgical instrument can pass through the instrument channel 420 and the third through hole 103 from the endoscope to perform the surgical operation.
[0029] 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 extended mirror further includes a light guide 300, at least part of which is disposed in the second through hole 102. In this embodiment, the light guide 300 is disposed in the second through hole 102, and the light guide 300 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 being irradiated on the inner wall of the second through hole 102, thereby solving the problem of reducing the irradiation effect of the light source module.
[0030] And / or, in order to reduce the difficulty of assembling the mirror base 100, 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, and the central axis of the positioning protrusion 130 deviates from the central axis of the mirror base 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 420, and the third through hole 103 can be connected to the instrument channel 420 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 400, the positioning protrusion 130 needs to be positioned and inserted into the instrument channel 420, and the open end 110 needs to be sleeved on the outside of the insertion portion 400, after the positioning protrusion 130 is positioned and inserted into the instrument channel 420, 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 420, 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 420, and the first through hole 101 corresponds to the camera module 410, 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 400, which can improve the docking stability between the lens holder 100 and the distal end of the insertion part 400, thereby preventing the lens holder 100 from rotating relative to the distal end of the insertion part 400 during the use of the endoscope, thereby preventing the first through hole 101 from being misaligned with the camera module 410, and preventing the third through hole 103 from being misaligned with the instrument channel 420.
[0031] In an alternative embodiment, see Figure 5 , the first through hole 101 and the second through hole 102 are arranged at intervals, and the portion of the lens holder 100 located between the first through hole 101 and the second through hole 102 is provided with an escape opening 104, and the first through hole 101 is connected to the second through hole 102 through the escape opening 104, and when the lens holder 100 is connected to the distal end of the insertion portion 400, a portion of the light source module extends into the second through hole 102, and a portion of the light source module in its own radial direction is located in the escape opening 104. In the specific application of this embodiment, a portion of the light source module in its own radial direction is located in the escape opening 104, and the escape opening 104 is provided in the lens holder 100, so the light source module can extend into the interior of the lens holder 100 through the escape opening 104, and compared with the case where the light source module is completely located in the second through hole 102, this embodiment can reduce the space occupied by the light source module in the second through hole 102.
[0032] And / or, a portion of the camera module 410 extends into the first through hole 101, and a portion of the camera module 410 in its radial direction is located in the avoidance opening 104. Similarly, the camera module 410 of this embodiment can extend into the interior of the lens holder 100 through the avoidance opening 104, thereby reducing the space occupied by the camera module 410 in the first through hole 101.
[0033] In order to improve the stability of the magnifying lens 200 disposed in the first through hole 101, in an optional embodiment, the first through hole 101 includes a first hole segment 105 and a second hole segment 106 sequentially distributed in the direction extending from the closed end 120 to the open end 110, the cross-sectional area of the first hole segment 105 is larger than the cross-sectional area of the second hole segment 106, and a step surface 107 is formed at the junction between the first hole segment 105 and the second hole segment 106, and the magnifying lens 200 abuts against the step surface 107. In this embodiment, the first through hole 101 includes the first hole segment 105 and the second hole segment 106, the cross-sectional area of the first hole segment 105 is larger than the cross-sectional area of the second hole segment 106, thereby forming a stepped hole, and a step surface 107 is formed at the junction between the first hole segment 105 and the second hole segment 106, and the step surface 107 can stop and limit the magnifying lens 200 in the direction extending from the closed end 120 to the open end 110, thereby improving the stability of the magnifying lens 200 disposed in the first through hole 101. It should be noted that the magnifying lens 200 can be provided in the first through hole 101 by means of adhesive connection, clamping, etc. Of course, the cross-sectional area of the first through hole 101 in its own axial direction can also remain unchanged, and this application does not limit this.
[0034] In an optional embodiment, the mirror base 100 includes a rigid base 140 and an elastic sleeve 150. The elastic sleeve 150 is a tubular member and has a closed portion and an open portion disposed opposite to each other. The rigid base 140 is enclosed within the elastic sleeve 150, and the rigid base 140 is attached to the inner end surface of the closed portion. The rigid base 140 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 140 and an elastic sleeve 150, and the open portion of the elastic sleeve 150 is an open end 110, that is, the elastic sleeve 150 of the present application can be set on the outside of the distal end of the insertion part 400 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 400, thereby simplifying the structure of the lens holder 100 and the distal end of the insertion part 400; in addition, the elastic sleeve 150 is coated on the outside of the rigid seat 140, and the texture of the elastic sleeve 150 is relatively soft, so that the risk of the lens holder 100 contacting with human tissue and causing damage to human tissue can be reduced; in addition, the rigid seat 140 has a large rigidity, so the rigid seat 140 can be used as the installation base of the magnifying lens 200, thereby improving the installation stability of the magnifying 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 150 here can be a silicone sleeve, a rubber sleeve, etc.
[0035] In order to improve the connection strength between the rigid seat 140 and the elastic sleeve 150, in an optional embodiment, the rigid seat 140 includes a relatively bent main body 141 and a flange 142, the flange 142 extends toward the open portion, the main body 141 is attached to the inner end surface of the closed portion, and the flange 142 is attached to the inner circumferential surface of the elastic sleeve 150. In this embodiment, the rigid seat 140 includes a relatively bent main body 141 and a flange 142, the flange 142 is attached to the inner circumferential surface of the elastic sleeve 150, and compared with the flat rigid seat 140, the surface area of the rigid seat 140 can be increased by the flange 142 in this embodiment, thereby increasing the contact area between the rigid seat 140 and the elastic sleeve 150, and further improving the connection strength between the rigid seat 140 and the elastic sleeve 150.
[0036] Furthermore, an accommodating groove 151 is provided on the inner wall of the elastic sleeve 150 , the flange portion 142 is located in the accommodating groove 151 , and the inner wall of the flange portion 142 is flush with the inner side wall of the elastic sleeve 150 .
[0037] like Figure 6As shown, the embodiment of the present application also discloses an insertion assembly of an endoscope, including an insertion portion 400 and the expansion lens described in any of the above embodiments. The embodiment of the present application adds a magnifying lens 200 at the distal end of the camera module 410, so that the magnifying lens 200 can be used as a part of the lens of the camera module 410, which will change the light propagation path, thereby increasing the focal length of the camera module 410, and then reducing the field of view of the camera module 410, so as to increase the proportion of the object to be viewed in the viewing image, so that the current endoscope is adapted to the scene that requires a larger proportion of the object to be viewed in the viewing image, so as to facilitate the doctor to observe the internal tissue or lesion waiting for the viewing object.
[0038] The present application also discloses an endoscope, including the above-mentioned insertion assembly. The endoscope referred to in the present application can be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a rhinoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc. The present application does not specifically limit the type of the endoscope.
[0039] 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. An expansion lens of an endoscope, characterized in that: The endoscope comprises a lens base (100) and a magnifying lens (200), wherein the magnifying lens (200) is arranged on the lens base (100), and the lens base (100) can be detachably connected to the distal end of an insertion portion (400) of an endoscope. When the lens holder (100) is connected to the distal end of the insertion portion (400), the magnifying lens (200) is opposite to the camera module (410) of the insertion portion (400), and the light-emitting side of the magnifying lens (200) faces the camera module (410).
2. The extended mirror according to claim 1, 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 sleeved on the outside of the distal end of the insertion part (400). The end wall of the closed end (120) is provided with a first through hole (101) penetrating the closed end. At least part of the magnifying lens (200) is arranged in the first through hole (101). When the lens holder (100) is connected to the distal end of the insertion part (400), the first through hole (101) corresponds to the camera module (410).
3. The extended mirror according to claim 2, 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 when the lens holder (100) is connected to the distal end of the insertion part (400), the second through hole (102) corresponds to the light source module of the insertion part (400); 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 when the lens holder (100) is connected to the distal end of the insertion part (400), the third through hole (103) corresponds to and is in communication with an instrument channel (420) of the insertion part (400).
4. The extended mirror according to claim 3, characterized in that: The extended mirror further comprises a light guide (300), at least a portion of the light guide (300) 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 (420); and the third through hole (103) can be connected to the instrument channel (420) through the accommodating space in the positioning protrusion (130).
5. The extended mirror according to claim 3, characterized in that: The first through hole (101) and the second through hole (102) are arranged at intervals, a portion of the mirror base (100) located between the first through hole (101) and the second through hole (102) is provided with an escape opening (104), and the first through hole (101) is connected to the second through hole (102) via the escape opening (104). When the lens holder (100) is connected to the distal end of the insertion portion (400), a portion of the light source module extends into the second through hole (102), and a portion of the light source module in its own radial direction is located in the avoidance opening (104), and / or a portion of the camera module (410) extends into the first through hole (101), and a portion of the camera module (410) in its own radial direction is located in the avoidance opening (104).
6. The extended mirror according to claim 2, characterized in that: The first through hole (101) comprises a first hole segment (105) and a second hole segment (106) which are sequentially distributed in a direction extending from the closed end (120) to the open end (110); the cross-sectional area of the first hole segment (105) is larger than the cross-sectional area of the second hole segment (106); a step surface (107) is formed at the junction between the first hole segment (105) and the second hole segment (106), and the magnifying lens (200) abuts against the step surface (107).
7. The extension mirror according to any one of claims 2 to 6, characterized in that: The mirror base (100) comprises a rigid base (140) and an elastic sleeve (150); the elastic sleeve (150) is a tubular member and has a closed portion and an open portion disposed opposite to each other; the rigid base (140) is enclosed within the elastic sleeve (150), and the rigid base (140) is attached to the inner end surface of the closed portion; the rigid base (140) and the closed portion cooperate to form the closed end (120), and the open end (110) is the open portion.
8. The extended mirror according to claim 7, characterized in that: The rigid seat (140) comprises a main body (141) and a flanged edge (142) that are relatively bent, wherein the flanged edge (142) extends toward the open portion, the main body (141) is attached to the inner end surface of the closed portion, and the flanged edge (142) is attached to the inner circumferential surface of the elastic sleeve (150).
9. An insertion assembly for an endoscope, characterized in that: It comprises an inserting portion (400) and the extension mirror according to any one of claims 1 to 8.
10. An endoscope, characterized in that: Comprising an insert assembly as claimed in claim 9.