Dilator and endoscopic examination equipment

Abstract

The invention provides a dilator and endoscopic examination equipment, and relates to the technical field of medical instruments. The dilator comprises an operating handle, a lower blade and an upper blade, the operating handle is provided with a first accommodating cavity with an open bottom end, and the top end of the operating handle is further provided with a visible window; the lower blade is located below the visible window and connected with the operating handle, and the upper blade is located above the visible window and rotationally connected with the operating handle; the dilator further comprises a dilator lens, and the dilator lens is located on the visible window and protrudes towards the side away from the first containing cavity. And / or the thickness of the dilator lens is less than or equal to 2mm. The embodiment of the invention provides the expander and the endoscopic examination equipment, so that the quantity of stray light in the light reflected by the first surface is reduced, and the imaging quality of the image acquisition assembly is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a dilator and an endoscopic inspection device. Background Art

[0002] In the field of medical technology, an inspection device is commonly used to inspect the human body, and a camera component for receiving light to form an image is usually provided inside the inspection device.

[0003] Existing image acquisition components often have cameras and various optical components inside. These optical components can be used to transmit light, and the light can form an image after being received by the camera.

[0004] However, obvious bright spots appear in the images acquired by the image acquisition component, affecting the imaging quality. Summary of the invention

[0005] The embodiments of the present invention provide a dilator and an endoscopic inspection device, which reduce the amount of stray light in the light reflected by the first surface and improve the imaging quality of the image acquisition component.

[0006] In a first aspect, an embodiment of the present invention provides a dilator, comprising an operating handle, a lower leaf and an upper leaf, wherein the operating handle has a first accommodating cavity with an open bottom end, and the top of the operating handle also has a visual window; the lower leaf is located below the visual window and connected to the operating handle, and the upper leaf is located above the visual window and rotatably connected to the operating handle;

[0007] The expander further comprises an expander lens, which is located at the visual window and protrudes toward a side away from the first accommodating cavity;

[0008] And / or, the thickness of the dilator lens is less than or equal to 2 mm.

[0009] Optionally, the expander lens comprises a first surface and a second surface opposite to each other, and the second surface is located between the first surface and the first accommodating cavity;

[0010] The first surface and the second surface include spherical surfaces.

[0011] Optionally, the radius of curvature of the first surface is less than or equal to 30 mm.

[0012] Optionally, the radius of curvature of the first surface is less than or equal to 28 mm.

[0013] Optionally, a lens support is further included, wherein the lens support fixes the outer edge of the expander lens, and the thickness of the expander lens is smaller than the thickness of the lens support.

[0014] Optionally, the expander lens comprises a first surface and a second surface opposite to each other, and the second surface is located between the first surface and the first accommodating cavity;

[0015] The second surface comprises a plane, and the second surface is flush with a surface of the lens support component facing the first accommodating cavity.

[0016] Optionally, the expander lens comprises a first surface and a second surface opposite to each other, and the second surface is located between the first surface and the first accommodating cavity;

[0017] The first surface comprises a plane, and the first surface is flush with a surface of the lens support component at a side away from the first accommodating cavity.

[0018] Optionally, the material of the dilator lens includes acrylic.

[0019] Optionally, the expander lens comprises a first surface and a second surface opposite to each other, and the second surface is located between the first surface and the first accommodating cavity;

[0020] The expander further includes an anti-reflection film, and the anti-reflection film is disposed on the first surface.

[0021] In a second aspect, an embodiment of the present invention provides an endoscopic inspection device, comprising the dilator as described in the first aspect;

[0022] The endoscopic inspection equipment further comprises an inspection device, which is installed in the first accommodating cavity of the expander.

[0023] Optionally, the inspection device includes an image acquisition component and at least one light emitting device;

[0024] The at least one light emitting device is located at the periphery of the light entrance of the image acquisition component; the at least one light emitting device and the light entrance are arranged toward the expander lens.

[0025] Optionally, the light-transmitting window of the inspection device is provided with a light-transmitting protective sheet, and the light-transmitting protective sheet is located between the dilator lens and the image acquisition component;

[0026] The plane where the light-transmitting protective sheet is located intersects with the reference plane of the expander lens; wherein the reference plane is the plane where the outer edge of the expander lens is located.

[0027] Optionally, the expander lens comprises a first surface and a second surface opposite to each other, wherein the second surface is located between the first surface and the first receiving cavity;

[0028] The distance between the first surface and the image acquisition component is less than or equal to 5.57 mm.

[0029] In the expander provided by the embodiment of the present invention, the expander lens is convex toward the side away from the first accommodating cavity, and / or the thickness of the expander lens is less than or equal to 2 mm. At least part of the light reflected by the first surface is not reflected back to the light entrance of the image acquisition component. Thus, the amount of stray light in the light reflected by the first surface is reduced, and the imaging quality of the image acquisition component is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of the three-dimensional structure of an endoscopy device provided by an embodiment of the present invention;

[0031] Figure 2 for Figure 1 A partial three-dimensional structural schematic diagram of the endoscopy device shown;

[0032] Figure 3 A schematic diagram of the three-dimensional structure of an inspection device provided by an embodiment of the present invention;

[0033] Figure 4 A schematic cross-sectional structure diagram of an endoscopy device provided by an embodiment of the present invention;

[0034] Figure 5 A schematic cross-sectional structure diagram of another endoscopy device provided by an embodiment of the present invention;

[0035] Figure 6 A schematic diagram of an image acquired by an image acquisition component when using a dilator in the known technology;

[0036] Figure 7 To adopt Figure 5 A schematic diagram of an image acquired by the image acquisition component when the expander is shown;

[0037] Figure 8 A distortion diagram of an image acquired by an image acquisition component when an expander in a known technology is used;

[0038] Fig. 9 To adopt Figure 5 A distortion diagram of an image acquired by the image acquisition component when the expander is shown;

[0039] Fig.10 A schematic cross-sectional structure diagram of another endoscopy device provided by an embodiment of the present invention;

[0040] Fig.11 A comparison diagram of light reflection by expander lenses of different thicknesses provided in an embodiment of the present invention;

[0041] Fig.12A comparison diagram of light reflection by expander lenses of different thicknesses provided in an embodiment of the present invention;

[0042] Fig.13 A schematic cross-sectional structure diagram of another endoscopy device provided by an embodiment of the present invention;

[0043] Fig.14 A schematic cross-sectional structure diagram of another endoscopy device provided by an embodiment of the present invention;

[0044] Fig.15 To adopt Fig.13 A schematic diagram of an image acquired by the image acquisition component when the expander is shown;

[0045] Fig.16 A schematic cross-sectional structure diagram of another endoscopy device provided by an embodiment of the present invention;

[0046] Fig.17 A schematic cross-sectional structure diagram of another endoscopy device provided by an embodiment of the present invention;

[0047] Fig.18 A schematic cross-sectional structure diagram of another endoscopic inspection device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0048] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0049] Figure 1 A schematic diagram of the three-dimensional structure of an endoscopy device provided by an embodiment of the present invention, Figure 2 for Figure 1 A partial three-dimensional structural diagram of the endoscopic inspection device shown, Figure 3 A schematic diagram of a three-dimensional structure of an inspection device provided in an embodiment of the present invention, referring to Figure 1-Figure 3 The dilator 30 is a device that can be inserted into a human cavity with a closed opening, such as the vagina, to expand the space of the human cavity, thereby facilitating the inspection of the human cavity. The inspection device 10 can be used in combination with the dilator 30, and the inspection device 10 is installed in the dilator 30.

[0050] The expander 30 includes an operating handle 930, a lower leaf 950 and an upper leaf 940. The operating handle 930 has a first accommodating cavity 920 with an open bottom. The top of the operating handle 930 also has a visual window. The lower leaf 950 is located below the visual window and connected to the operating handle 930, and the upper leaf 940 is located above the visual window and is rotatably connected to the operating handle 930.

[0051] The upper leaf 940 can rotate relative to the operating handle 930 to open or close with the lower leaf 950; when the upper leaf 940 and the lower leaf 950 are opened, the visible window can be exposed; when the upper leaf 940 and the lower leaf 950 are closed, the visible window can be blocked. Thus, when the inspection device 10 inspects the inspection position, such as the vagina, the upper leaf 940 can be controlled to rotate relative to the second operating handle 930 so as to close with the lower leaf 950, and the closed upper leaf 940 and lower leaf 950 are inserted into the inspection position; then, the upper leaf 940 is controlled to rotate in the opposite direction relative to the second operating handle 930 so as to open with the lower leaf 950 to expose the visible window and expand the space of the inspection position. At this time, the inspection device 10 can obtain an image of the inspection position through the exposed visible window, thereby inspecting the inspection position.

[0052] Figure 4 A schematic cross-sectional view of an endoscopic inspection device provided by an embodiment of the present invention, referring to Figure 1-Figure 4 , the expander 30 also includes an expander lens 910, and the expander lens 910 is located in the visual window. In the known technology, the expander lens 910 includes a first surface 911 and a second surface 912 opposite to each other. The first surface 911 and the second surface 912 are parallel. It is found through research that obvious bright spots appear in the image acquired by the image acquisition component, which affects the imaging quality. The expander 30 is separated from the inspection device 10, and no obvious bright spots appear in the image acquired by the inspection device 10 alone.

[0053] For example, reference Figure 1-Figure 4 The inspection device 10 includes at least one light emitting device 300. The light emitting device 300 can emit light under the action of the light source circuit board. The light emitting side of the light emitting device 300 faces the light transmission window 220. The light emitted by the light emitting device 300 can be emitted to the object to be inspected through the light transmission window 220, so that the image acquisition component 100 can capture the image of the object to be inspected. Studies have found that the light emitted by the light emitting device 300 is reflected by the first surface 911 of the expander lens 910 to form stray light. The stray light will reach the light inlet 110 of the image acquisition component 100. Entering into the image acquisition component 100 through the light inlet 110, it causes obvious bright spots to appear in the image acquired by the image acquisition component 100, affecting the imaging quality.

[0054] Figure 5 A schematic cross-sectional view of another endoscopic inspection device provided by an embodiment of the present invention, referring to Figure 1-Figure 3 ,as well as Figure 5The expander 30 further includes an expander lens 910, which is located in the visual window and convex toward the side away from the first accommodating cavity 920. The distance between the center of the expander lens 910 and the inspection device 10 is greater than the distance between the edge of the expander lens 910 and the inspection device 10. The expander lens 910 is a convex lens. After the light emitted by the light emitting device 300 is reflected by the first surface 911 of the expander lens 910, at least part of the light reflected by the first surface 911 is totally reflected in the expander lens 910 because the expander lens 910 convex toward the side away from the first accommodating cavity 920. The totally reflected light is transmitted laterally in the expander lens 910 without being reflected back to the light inlet 110 of the image acquisition component 100. As a result, the amount of stray light in the light reflected by the first surface 911 is reduced, and the imaging quality of the image acquisition component 100 is improved.

[0055] Figure 6 This is a schematic diagram of an image acquired by an image acquisition component when using a dilator in the known technology. Figure 7 To adopt Figure 5 Schematic diagram of the image acquired by the image acquisition component when the expander is shown, refer to Figure 6 and Figure 7 , in the image acquired by the image acquisition component when using the expander in the known technology, the energy of the stray light is 2.6E-5W. Figure 5 In the image captured by the image acquisition component when the expander is shown, the energy of the stray light is 2.6E-7W. Figure 5 The illustrated expander reduces the energy of stray light by two orders of magnitude compared to expanders used in the prior art.

[0056] Figure 8 is a distortion diagram of an image acquired by an image acquisition component when using an expander in the known technology, Fig. 9 To adopt Figure 5 The distortion diagram of the image acquired by the image acquisition component when the expander is shown, refer to Figure 8 and Fig. 9 ,use Figure 5 The expander shown has the same distortion level as the expander in the known technology, and will not cause distortion problems.

[0057] Fig.10 A schematic cross-sectional view of another endoscopic inspection device provided by an embodiment of the present invention. Fig.11 A comparison diagram of light reflection by expander lenses of different thicknesses provided in an embodiment of the present invention. Fig.11 The middle dashed line schematically shows the position of the light inlet 110 of the image acquisition component 100. Fig.12 A comparison diagram of light reflection by dilator lenses of different thicknesses provided in an embodiment of the present invention, referring to Figure 10-12 , the plurality of expander lenses 910 include a first expander lens 9101 and a second expander lens 9102. The thickness of the first expander lens 9101 is greater than the thickness of the second expander lens 9102. The lateral displacement of the first expander lens 9101 after being reflected by the upper surface (i.e., the first surface) is d2. The lateral displacement of the second expander lens 9102 after being reflected by the upper surface (i.e., the first surface) is d1. d2 is greater than d1. d2-d1=d. d is the difference in lateral displacement of the light reflected by the first expander lens 9101 and the second expander lens 9102. The greater the thickness of the expander lens 910, the greater the lateral displacement of the light after being reflected by the expander lens 910, resulting in a stronger energy of the reflected light entering the image acquisition component 100. Therefore, the thickness H1 of the expander lens 910 can be set to be less than or equal to 2 mm. By reducing the thickness of the expander lens 910, the reflected light of the expander lens 910 is moved away from the light inlet 110 of the image acquisition component 100 after being lateral displaced. As a result, the amount of stray light in the light reflected by the first surface 911 is reduced, and the imaging quality of the image acquisition component 100 is improved.

[0058] In another embodiment, the two embodiments may be combined, that is, the expander lens 910 is configured as a convex lens, and the thickness of the expander lens 910 is reduced.

[0059] In the expander provided by the embodiment of the present invention, the expander lens 910 is convex toward the side away from the first accommodating cavity 920, and / or the thickness H1 of the expander lens 910 is less than or equal to 2 mm. At least part of the light reflected by the first surface 911 is not reflected back to the light entrance 110 of the image acquisition component 100. Thus, the amount of stray light in the light reflected by the first surface 911 is reduced, and the imaging quality of the image acquisition component 100 is improved.

[0060] Exemplarily, the expander lens 910 includes a first surface 911 and a second surface 912 opposite to each other, and the second surface 912 is located between the first surface 911 and the first accommodating cavity 920. When the thickness H1 of the expander lens 910 is reduced, the distance between the second surface 912 and the image acquisition component 100 is not changed. Fig.11As shown, the distance between the first surface 911 and the image acquisition component 100 is reduced, so that the reflected light of the expander lens 910 is laterally displaced and moves away from the light inlet 110 of the image acquisition component 100. As a result, the amount of stray light in the light reflected by the first surface 911 is reduced, and the imaging quality of the image acquisition component 100 is improved. It can be understood that in some feasible embodiments, when the distance between the first surface 911 and the image acquisition component 100 is reduced, the distance between the second surface 912 and the image acquisition component 100 can be slightly increased, or the distance between the second surface 912 and the image acquisition component 100 can be slightly reduced.

[0061] Optionally, refer to Figure 5 The expander lens 910 includes a first surface 911 and a second surface 912 that are opposite to each other, and the second surface 912 is located between the first surface 911 and the first accommodating cavity 920. The first surface 911 is the outer surface of the expander lens 910. The second surface 912 is the inner surface of the expander lens 910. The first surface 911 and the second surface 912 include spherical surfaces. On the one hand, the spherical surface is symmetrical with respect to light in all directions. It has the same ability to reduce stray light for the light emitting devices 300 at all positions. Therefore, the degree of reducing stray light for the light emitting devices 300 at all positions is relatively balanced. On the other hand, the spherical surface is easy to produce and process, and the production cost is low.

[0062] In other embodiments, the first surface 911 and / or the second surface 912 may also include a non-spherical surface, such as a parabola or a free-form surface.

[0063] Optionally, refer to Figure 5 , the first surface 911 and the second surface 912 include spherical surfaces. The radius of curvature of the first surface 911 is less than or equal to 30 mm. The smaller the radius of curvature of the first surface 911 and the second surface 912, the more convex the first surface 911 and the second surface 912, the greater the difference between the incident angle and the reflection angle at the first surface 911, and the greater the probability of total reflection. The larger the radius of curvature of the first surface 911 and the second surface 912, the smaller the difference between the incident angle and the reflection angle at the first surface 911, and the smaller the probability of total reflection. In an embodiment of the present invention, the radius of curvature of the first surface 911 is less than or equal to 30 mm, and the risk of stray light at the nominal position can be controlled below a preset level. The imaging quality of the image acquisition component 100 is improved.

[0064] Furthermore, the radius of curvature of the first surface 911 may be set to be less than or equal to 28 mm. This is to cope with assembly deviation when assembling the expander lens 910, or position movement after assembling the expander lens 910. When the radius of curvature of the first surface 911 is set to be less than or equal to 28 mm, the risk of stray light can be controlled below a preset level when the expander lens 910 is eccentric by 0.5 mm. This improves the imaging quality of the image acquisition component 100.

[0065] Fig.13 A schematic cross-sectional view of another endoscopic inspection device provided by an embodiment of the present invention, referring to Fig.13 The expander 30 further includes a lens support 960, which fixes the outer edge of the expander lens 910. The thickness H1 of the expander lens 910 is less than the thickness H2 of the lens support 960. The thickness of the expander lens 910 is smaller than that in the known technology. By reducing the thickness of the expander lens 910, the reflected light of the expander lens 910 is laterally displaced and moves away from the light inlet 110 of the image acquisition component 100. As a result, the amount of stray light in the light reflected by the first surface 911 is reduced, and the imaging quality of the image acquisition component 100 is improved.

[0066] Optionally, refer to Fig.13 The expander lens 910 includes a first surface 911 and a second surface 912 opposite to each other, and the second surface 912 is located between the first surface 911 and the first accommodating cavity 920. The second surface 912 includes a plane, and the second surface 912 is flush with the surface of the lens support 960 facing the first accommodating cavity 920. The side of the expander lens 910 away from the first accommodating cavity 920 in the known technology is removed to reduce the thickness of the expander lens 910.

[0067] Exemplarily, the thickness H1 of the dilator optic 910 is less than or equal to 1 mm.

[0068] Fig.14 A schematic cross-sectional view of another endoscopic inspection device provided by an embodiment of the present invention, referring to Fig.14 The expander lens 910 includes a first surface 911 and a second surface 912 opposite to each other, and the second surface 912 is located between the first surface 911 and the first accommodating cavity 920. The first surface 911 includes a plane, and the first surface 911 is flush with the surface of the lens support 960 on the side away from the first accommodating cavity 920. The side of the expander lens 910 adjacent to the first accommodating cavity 920 in the known technology is removed to reduce the thickness of the expander lens 910.

[0069] It should be noted that, in the prior art, the side of the expander lens 910 adjacent to the first accommodating cavity 920 is removed, which not only reduces the thickness of the expander lens 910, but also increases the distance between the second surface 912 and the image acquisition component 100. Fig.14 The technical solution shown, Fig.13 In the illustrated solution, the side of the expander lens 910 away from the first accommodating cavity 920 in the prior art is removed, which does not change the distance between the second surface 912 and the image acquisition component 100, and has a better stray light elimination capability.

[0070] Fig.15 To adopt Fig.13 Schematic diagram of the image acquired by the image acquisition component when the expander is shown, refer to Figure 6 and Fig.15 , in the image acquired by the image acquisition component when using the expander in the known technology, the energy of the stray light is 2.6E-5W. Fig.13 In the image captured by the image acquisition component when the expander is shown, the energy of the stray light is 3.2E-6W. Fig.13 The expander shown reduces the energy of stray light to 1 / 8 of the original value compared with the expander in the known technology.

[0071] Optionally, the material of the expander lens 910 includes acrylic. Acrylic is also called organic glass or PMMA. Compared with PC plastic, the use of acrylic can produce a lateral displacement difference of the reflected light. Since the surface reflectivity of PC plastic is high and the surface reflectivity of acrylic is relatively low, the ratio of the energy of the two after being reflected from the outer surface and then emitted from the inner surface is 100:81. In the embodiment of the present invention, the energy of stray light is reduced by using acrylic material.

[0072] Fig.16 A schematic cross-sectional view of another endoscopic inspection device provided by an embodiment of the present invention, referring to Fig.16 The expander lens 910 includes a first surface 911 and a second surface 912 opposite to each other, and the second surface 912 is located between the first surface 911 and the first accommodating cavity 920. The expander 30 also includes an anti-reflection film 970, and the anti-reflection film 970 is disposed on the first surface 911. When the light emitted by the light emitting device 300 is projected onto the first surface 911, since the anti-reflection film 970 is disposed on the first surface 911, the anti-reflection film 970 increases the amount of light transmitted on the first surface 911, reduces the amount of light reflected on the first surface 911, and reduces the energy of stray light.

[0073] For example, the antireflection film 970 may be disposed on Fig.16The anti-reflection film 970 may also be disposed on the curved first surface 911 in the above embodiment. That is, the anti-reflection film 970 may also be disposed on the convex first surface 911 in the above embodiment.

[0074] The embodiment of the present invention also provides an endoscopy device. Figure 1-Figure 16 The endoscopic inspection device includes the dilator 30 in the above embodiment. The endoscopic inspection device also includes an inspection device 10 , which is installed in the first accommodating cavity 920 of the dilator 30 .

[0075] Optionally, refer to Figure 3 and Figure 5 The inspection device includes an image acquisition component 100 and at least one light emitting device 300. The at least one light emitting device 300 is located at the periphery of the light inlet 110 of the image acquisition component 100. The at least one light emitting device 300 and the light inlet 110 are arranged toward the expander lens 910. The light emitted by the light emitting device 300 propagates toward the expander lens 910, passes through the expander lens 910, and is emitted to the object to be inspected. The signal light carrying the information of the object to be inspected reflected by the object to be inspected passes through the expander lens 910, is photographed by the image acquisition component 100, and forms an image of the object to be inspected.

[0076] For example, reference Figure 3 There may be a plurality of light emitting devices 300 , and the spectra of the light emitted by the plurality of light emitting devices 300 may be the same or different. The plurality of light emitting devices 300 are arranged around the light entrance 110 of the image acquisition component 100 .

[0077] Fig.17 A schematic cross-sectional view of another endoscopic inspection device provided by an embodiment of the present invention. Fig.17 Some elements of the expander 30 are omitted, for example, the operating handle 930, the lower leaf 950 and the upper leaf 940 are omitted. Figure 2 , Fig.13 and Fig.17, the light-transmitting window 220 of the inspection device 10 is provided with a light-transmitting protective sheet 230, and the light-transmitting protective sheet 230 is located between the expander lens 910 and the image acquisition component 100. The light-transmitting protective sheet 230 is located between the expander lens 910 and the light-emitting device 300. The light emitted by the light-emitting device 300 propagates toward the expander lens 910, and is first projected onto the light-transmitting protective sheet 230 before being projected onto the expander lens 910. In the embodiment of the present invention, the plane where the light-transmitting protective sheet 230 is located intersects with the reference plane 980 of the expander lens 910. Among them, the reference plane 980 is the plane where the outer edge of the expander lens 910 is located. The expander lens 910 is inclined at a certain angle relative to the light-transmitting protective sheet 230, instead of setting the two in parallel. This prevents the light reflected by the second surface 912 from reaching the light inlet 110 of the image acquisition component 100. This is to prevent light from entering the image acquisition component 100 through the light entrance 110, causing obvious bright spots to appear in the image acquired by the image acquisition component 100, thereby affecting the imaging quality.

[0078] Exemplarily, the expander lens 910 is a parallel flat plate. The plane where the outer edge of the expander lens 910 is located, that is, the reference plane 980 of the expander lens 910 is the plane where the expander lens 910 is located. In other words, the reference plane 980 of the expander lens 910 is the first surface 911 or the second surface 912 of the expander lens 910.

[0079] Exemplarily, the inclination angle of the expander lens 910 relative to the light-transmitting protective sheet 230 is greater than 3° and less than 4°. In an optional embodiment, for example, it can be selected to be 3.5°.

[0080] Fig.18 A schematic cross-sectional view of another endoscopic inspection device provided by an embodiment of the present invention, referring to Fig.18 ,and Fig.17 The difference is that the expander lens 910 is a convex lens. The reference plane 980 of the expander lens 910 is the plane where the outer edge of the expander lens 910 is located. In one embodiment, the reference plane 980 of the expander lens 910 is parallel to the tangent plane at the position of the first surface 911.

[0081] Optionally, the expander lens 910 includes a first surface 911 and a second surface 912 opposite to each other, and the second surface 912 is located between the first surface 911 and the first accommodating cavity 920. The distance between the first surface 911 and the image acquisition component 100 is less than or equal to 5.57 mm. By reducing the distance between the first surface 911 and the image acquisition component 100, the reflected light of the expander lens 910 is laterally displaced and moves away from the light inlet 110 of the image acquisition component 100. As a result, the amount of stray light in the light reflected by the first surface 911 is reduced, and the imaging quality of the image acquisition component 100 is improved.

[0082] Furthermore, the distance between the first surface 911 and the image acquisition component 100 is less than or equal to 4.76 mm.

[0083] For example, reference Figure 3 , the first end of the inspection device 10 may be provided with a light-transmitting window 220. The inspection device 10 is provided with a second accommodating cavity 240. The image acquisition component 100 and the light-emitting device 300 are located in the second accommodating cavity 240. The light-transmitting window 220 is provided with a light-transmitting protective sheet 230, which can protect the image acquisition component 100 to prevent the image acquisition component 100 from being contaminated by impurities such as liquids and particles.

[0084] For example, reference Figure 1-Figure 3 The inspection device 10 includes a housing 200 and a key assembly 500. The housing 200 has a second accommodating cavity 240. Part of the key assembly 500 is located in the second accommodating cavity 240.

[0085] Exemplarily, the distance between the surface of the light-transmitting protective sheet 230 facing the image acquisition component 100 and the image acquisition component 100 is less than or equal to 1 mm. The distance between the surface of the light-transmitting protective sheet 230 facing the dilator lens 910 and the surface of the dilator lens 910 facing the light-transmitting protective sheet 230 is greater than or equal to 0.76 mm and less than or equal to 1.57 mm.

[0086] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, combinations and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A dilator, characterized in that: The invention comprises an operating handle, a lower leaf and an upper leaf, wherein the operating handle has a first accommodating cavity with an open bottom end, and the top of the operating handle also has a visual window; the lower leaf is located below the visual window and connected to the operating handle, and the upper leaf is located above the visual window and is rotatably connected to the operating handle; The expander further comprises an expander lens, which is located at the visual window and protrudes toward a side away from the first accommodating cavity; And / or, the thickness of the dilator lens is less than or equal to 2 mm.

2. The dilator according to claim 1, characterized in that The expander lens comprises a first surface and a second surface opposite to each other, the second surface being located between the first surface and the first receiving cavity; The first surface and the second surface include spherical surfaces.

3. The expander according to claim 2, characterized in that The radius of curvature of the first surface is less than or equal to 30 mm.

4. The expander according to claim 2, characterized in that The radius of curvature of the first surface is less than or equal to 28 mm.

5. The dilator according to claim 1, characterized in that A lens support is also included, wherein the lens support fixes the outer edge of the expander lens, and the thickness of the expander lens is smaller than the thickness of the lens support.

6. The dilator according to claim 5, characterized in that The expander lens comprises a first surface and a second surface opposite to each other, the second surface being located between the first surface and the first receiving cavity; The second surface comprises a plane, and the second surface is flush with a surface of the lens support component facing the first accommodating cavity.

7. The dilator according to claim 5, characterized in that The expander lens comprises a first surface and a second surface opposite to each other, the second surface being located between the first surface and the first receiving cavity; The first surface comprises a plane, and the first surface is flush with a surface of the lens support component at a side away from the first accommodating cavity.

8. The dilator according to claim 1, characterized in that The material of the dilator lens includes acrylic.

9. The dilator according to claim 1, characterized in that The expander lens comprises a first surface and a second surface opposite to each other, the second surface being located between the first surface and the first receiving cavity; The expander further includes an anti-reflection film, and the anti-reflection film is disposed on the first surface.

10. An endoscopy device, characterized in that: comprising a dilator as claimed in any one of claims 1 to 9; The endoscopic inspection equipment further comprises an inspection device, which is installed in the first accommodating cavity of the expander.

11. The endoscopic inspection device according to claim 10, characterized in that The inspection device includes an image acquisition component and at least one light emitting device; The at least one light emitting device is located at the periphery of the light entrance of the image acquisition component; the at least one light emitting device and the light entrance are arranged toward the expander lens.

12. The endoscopic inspection device according to claim 11, characterized in that The light-transmitting window of the inspection device is provided with a light-transmitting protective sheet, and the light-transmitting protective sheet is located between the dilator lens and the image acquisition component; The plane where the light-transmitting protective sheet is located intersects with the reference plane of the expander lens; wherein the reference plane is the plane where the outer edge of the expander lens is located.

13. The endoscopic inspection device according to claim 11, characterized in that The expander lens includes a first surface and a second surface opposite to each other, wherein the second surface is located between the first surface and the first receiving cavity; The distance between the first surface and the image acquisition component is less than or equal to 5.57 mm.

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