CN212165756U - Monocular electronic hard tube endoscope - Google Patents
Monocular electronic hard tube endoscope Download PDFInfo
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- CN212165756U CN212165756U CN201921217042.5U CN201921217042U CN212165756U CN 212165756 U CN212165756 U CN 212165756U CN 201921217042 U CN201921217042 U CN 201921217042U CN 212165756 U CN212165756 U CN 212165756U
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- 238000005286 illumination Methods 0.000 claims abstract description 33
- 230000003287 optical effect Effects 0.000 claims description 18
- 239000013307 optical fiber Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 18
- 238000003384 imaging method Methods 0.000 abstract description 15
- 238000009877 rendering Methods 0.000 abstract description 5
- 239000003814 drug Substances 0.000 abstract description 3
- 238000007689 inspection Methods 0.000 abstract description 2
- 238000012634 optical imaging Methods 0.000 description 5
- 210000000056 organ Anatomy 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 231100000915 pathological change Toxicity 0.000 description 2
- 230000036285 pathological change Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000001835 viscera Anatomy 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The embodiment of the utility model discloses monocular electron hard tube endoscope relates to medical instrument technical field. The monocular electronic hard tube endoscope comprises a tube body, wherein an image sensor is arranged at the first end of the tube body, an illumination channel is axially arranged on the tube body, the illumination channel is at least provided with an opening located at the first end of the tube body, and the opening is located on the side portion of the image sensor. Because the image sensor is arranged at the first end of the tube body, namely the front end of the tube body in the application process in general, the projection path which a target object passes before entering the image sensor for imaging can be shortened, thereby reducing the color rendering performance reduction, the deformation of the periphery of an image, the reduction of the visible angle and the image noise which are possibly generated in the imaging process to a certain extent. The utility model is suitable for an in internal medicine inspection and operation.
Description
Technical Field
The utility model relates to the technical field of medical equipment, especially, relate to a monocular electronic hard tube endoscope.
Background
The endoscope is a medical apparatus which is commonly used in medicine and can be sent into a human body cavity to examine the pathological changes of human organs, and the pathological changes can be examined and diagnosed visually by using the endoscope.
The arrangement mode of the existing endoscope inserted into a catheter and an optical imaging element in a human body causes that target objects such as human organs and the like can enter the optical imaging element for imaging only through a far projection path, and because the target objects need to be projected for imaging in a long distance, image noise can be inevitably generated in the imaging process.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the present invention provides a monocular electronic hard tube endoscope, which can shorten the projection path that a target object passes before entering an image sensor for imaging, thereby reducing, to a certain extent, the color rendering performance degradation, the deformation of the image periphery, the reduction of the visible angle, and the image noise that may be generated in the imaging process.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a monocular electron hard tube endoscope, includes the body the first end of body is equipped with image sensor, be equipped with the illumination passageway on the body axial, the illumination passageway is equipped with the opening that is located the first end of body at least, just the opening is located the image sensor lateral part.
Preferably, the nested cylinder seat that has in the body, the cylinder seat, the tip that is located the body first end are equipped with the open slot, image sensor install in the open slot bottom is equipped with to the through-hole of another tip of cylinder seat, wear to be equipped with the cable in the through-hole, cable one end connect in image sensor.
Preferably, the intersection line of open slot and cylinder seat includes first rectangle, second rectangle, first circular arc and second circular arc, first rectangle and second rectangle are symmetrical about the first axle cross-section of cylinder seat, first circular arc and second circular arc are symmetrical about the second axle cross-section of cylinder seat, first axle cross-section is perpendicular with the second axle cross-section, the base of first rectangle, the base of first circular arc, second rectangle and second circular arc connect gradually and constitute a confined radius head rectangle.
Preferably, a first channel is further provided in the tube body along the axial direction of the tube body.
Preferably, a first channel and a second channel are further arranged in the tube body along the axial direction of the tube body.
Preferably, the image sensor is located at the center of the cross section of the pipe body; the first passage is eccentrically disposed with respect to an axis of the pipe body.
Preferably, the image sensor is located at the center of the cross section of the pipe body; the first channel and the second channel are eccentrically arranged relative to the axis of the tube body, and the first channel and the second channel are adjacently arranged, or the first channel and the second channel are respectively arranged on two sides of the image sensor.
Preferably, the pipe body comprises a first sleeve and a second sleeve, the second sleeve is sleeved outside the first sleeve, and a gap is formed between the first sleeve and the second sleeve; the annular space between the outer side surface of the first sleeve and the inner side surface of the second sleeve forms the illumination channel, and the image sensor is arranged at the first end of the first sleeve;
or,
the image sensor is characterized in that a first light path channel and a second light path channel are arranged in parallel in the tube body along the axial direction of the tube body, the first light path channel and the second light path channel are respectively arranged on two sides of the image sensor, and the first light path channel and the second light path channel form the illumination channel.
Preferably, a light guide medium is arranged in the illumination channel.
Preferably, the light guide medium is connected with a first cold light source connector, a cold light source is connected to the first cold light source connector, and the first cold light source connector is located at or close to the second end of the tube body;
the light guide medium is an optical fiber; or,
the light guide medium is a light guide plate; or,
the light guide medium is a light guide ink layer sprayed in the light guide channel.
Preferably, the image sensor is electrically connected to an optical processing device, and an output end of the optical processing device is connected to a 3D stereoscopic display.
Preferably, the diameter of the pipe body is more than 0 and less than or equal to 11 mm.
Preferably, the image sensor is located in an opening of the illumination channel.
The embodiment of the utility model provides a monocular electron hard tube endoscope, including the body first end is equipped with image sensor, be equipped with the illumination passageway on the body axial, the illumination passageway is equipped with the opening that is located the body first end at least, just the opening is located the image sensor lateral part. Because the image sensor is arranged at the first end of the tube body, namely the front end of the tube body in the application process in general, the projection path which the target object passes before entering the image sensor for imaging can be shortened, and the color rendering performance reduction, the deformation of the periphery of the image, the reduction of the visual angle and the image noise which are possibly generated in the imaging process can be reduced to a certain extent.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of an embodiment of a monocular electronic hard tube endoscope of the present invention;
FIG. 2 is a partial cross-sectional view taken along the axis A-A of FIG. 1;
FIG. 3 is a schematic view of a first end portion of an embodiment of the monocular electronic hard tube endoscope of the present invention;
FIG. 4 is a schematic view of a first end portion of another embodiment of a monocular electronic hard tube endoscope of the present invention;
FIG. 5 is a schematic view of a first end portion of a monocular electronic hard tube endoscope according to yet another embodiment of the present invention;
fig. 6 is a front view of the cylinder block of fig. 1 according to an embodiment.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
In order to help the public to understand the technical scheme and technical effect of the present invention, the current endoscope is briefly introduced as follows: the endoscope comprises a catheter and an optical imaging element, such as an image sensor, wherein the optical imaging element is generally arranged at the tail end of the catheter, so that when the endoscope is used for detecting whether internal organs of a human body have lesions, target objects such as organs of the human body can enter the optical imaging element for imaging through a far projection path, and because the target objects need to be subjected to long-distance projection imaging, image noise is inevitably generated in the imaging process.
In order to solve the prior art, the embodiment of the utility model provides a monocular electronic hard tube endoscope is applicable to in internal medicine inspection and the operation. Referring to fig. 1 to 4, the monocular electronic hard tube endoscope includes: the tube body is equipped with image sensor 2 in the first end of tube body, be equipped with illumination passageway 3 on the tube body axial, illumination passageway 3 is equipped with the opening that is located the first end of tube body at least, just the opening is located image sensor 2 lateral parts.
The first end of the tube body is the end of the tube body which is inserted into a human body firstly during work, namely the front end during application, and the tube body is made of stainless steel. The image sensor 2 is used for shooting images of an examination or operation part and organs or tissues nearby the examination or operation part, and can output the images; the image sensor 2 is an electronic CMOS image sensor, and its specification size is greater than 0 and equal to or less than 1/18 inches; specifically, the image sensor 2 is electrically connected to an optical processing device 4, and an output end of the optical processing device 4 is connected to a 3D stereoscopic display 5; the image sensor 2 sends the shot image to the optical processing device 4, and the optical processing device 4 processes the image and outputs the processed image to the 3D stereoscopic display 5 for displaying so that an operator can observe the inside of the human body. The illumination channel 3 is used for providing illumination for image shooting of the image sensor 2, and the illumination channel 3 can be arranged on the whole length of the tube body or on the partial length from any position to the first end on the length of the tube body.
The embodiment of the utility model provides a monocular electron hard tube endoscope, including the body the first end image sensor 2 of body, be equipped with illumination passageway 3 on the body axial, illumination passageway 3 is equipped with the opening 31 that is located the first end of body at least, just opening 31 is located 2 lateral parts of image sensor. Since the image sensor 2 is disposed at the first end of the tube, that is, the front end of the tube in the application process, the projection path of the target object before entering the image sensor 2 for imaging can be shortened, and therefore, the color rendering performance reduction, the deformation of the periphery of the image, the reduction of the visible angle and the image noise which may be generated in the imaging process can be reduced to a certain extent.
As shown in fig. 3 and 5, the image sensor 2 may also be located in the opening of the illumination channel 3.
Referring to fig. 1, 2 and 6, in this embodiment, as an optional embodiment, a cylinder seat 6 is nested in the tube, an open slot 7 is formed in an end portion of the cylinder seat 6 located at the first end of the tube, the image sensor 2 is installed in the open slot 7, a through hole reaching the other end portion of the cylinder seat 6 is formed in the bottom of the open slot 7, a cable 9 is inserted into the through hole, and one end of the cable 9 is connected to the image sensor 2. Thus, a specific technical scheme for fixedly mounting the image sensor 2 is provided, and the image sensor 2 can be protected by mounting the image sensor 2 in the opening groove 7 of the cylindrical seat 6.
In this embodiment, specifically, a transparent cover or a protective cover with a light exit hole may be further disposed at an opening end of the open slot 7, and a gap is disposed between the image sensor 2 and the transparent cover or the protective cover with the light exit hole; therefore, the monocular electronic hard tube endoscope can be ensured to be used, and the situation that the clear collection of images is influenced because the end part of the image sensor 2 is attached to the human organ or tissue can not occur no matter the tube body is pushed to the depth.
Wherein, it can be understood that the other end of the cable 9 can be connected with an optical processing device 4, and the optical processing device 4 is used for processing the collected image and outputting the processed image to the display 5; or the cable 9 may be directly connected to the display 5 for output.
Referring to fig. 1, 2 and 6, in another embodiment, the intersecting line of the open slot 7 and the cylinder base 6 includes a first rectangle, a second rectangle, a first arc and a second arc, the first rectangle and the second rectangle are symmetrical about a first axial section of the cylinder base 6, the first arc and the second arc are symmetrical about a second axial section of the cylinder base 6, the first axial section is perpendicular to the second axial section, and the bottom edge of the first rectangle, the bottom edge of the first arc, the bottom edge of the second rectangle and the second arc are connected in sequence to form a closed inverted-head rectangle.
The open slot 7 is formed by cutting one end of the cylindrical seat 6, and the open slot 7 comprises a plurality of surfaces which are respectively two symmetrical rectangular surfaces and a fillet rectangular surface; the fillet rectangular surface is positioned between the two symmetrical rectangular surfaces to form the open slot 7. In one embodiment, the specification dimensions of the cylinder block are: height 7mm, diameter 2.7mm, opening groove depth 4mm, width between two rectangular surfaces of opening groove
Referring to fig. 3 and 4, in an alternative embodiment, a first channel 15 is further provided in the tube body along the axial direction of the tube body, and the first channel 15 is used as an access channel for medical instruments, such as forceps, a sampler, etc., so that the medical instruments can be conveniently entered into the human body by means of the first channel 15, and the pain of opening an instrument insertion channel on the body of the patient is avoided.
In one embodiment, the sampler comprises a needle, a rigid connecting tube and a bag, wherein the needle is positioned at the first end of the tube body, the needle is connected to one end of the rigid connecting tube, and the bag is connected to the other end of the rigid connecting tube.
Specifically, the image sensor 2 is located at the center of the cross section of the pipe body; the first passage 15 is arranged eccentrically with respect to the axis of the tubular body.
Referring to fig. 3 and 4, in an alternative embodiment, a second channel 16 is further provided in the tube body along the axial direction of the tube body, and the second channel 16 is used as a channel for injecting liquid or gas to clean the human body examination part, so that when foreign matters are attached to the human body examination part and cannot be seen clearly, the cleaning liquid can be flushed into the examination part in the human body through the second channel 16 to clean the examination part, so as to acquire a clear and effective image of the examination part.
Referring to fig. 3, in the present embodiment, specifically, the image sensor 2 is located at a cross-sectional center position of the pipe body; the first passage 15 and the second passage 16 are eccentrically disposed with respect to the axis of the pipe body, and the first passage and the second passage are adjacently disposed.
Referring to fig. 4, in another embodiment, the image sensor 2 is located at the center of the cross section of the pipe body; the first channel 15 and the second channel 16 are eccentrically arranged relative to the axis of the tube body, and the first channel and the second channel are respectively arranged on two sides of the image sensor.
Specifically, the first channel 15 and the second channel 16 are disposed symmetrically with respect to the optical axis of the image sensor.
In addition, it should be noted that, in different application scenarios, the outer diameter of the pipe body is different in size, where the size unit of the outer diameter of the pipe body is mm, and table 1 lists the size specifications of the outer diameter of the pipe body in several specific application scenarios, and may of course be set as needed.
TABLE 1
Referring to fig. 1, in a further embodiment, the pipe body comprises a first sleeve 1 and a second sleeve 10, the second sleeve 10 is sleeved outside the first sleeve 1, and a gap is formed between the first sleeve 1 and the second sleeve 10; the annular space between the outer side of the first sleeve 1 and the inner side of the second sleeve 10 forms the illumination channel, and the image sensor is arranged at the first end of the first sleeve 1.
In this embodiment, an annular space or gap is formed between the first sleeve 1 and the second sleeve 10 as the illumination channel 3, and the image sensor 2 is located at the first end of the first sleeve, so that a ring of annular illumination light is formed around the image sensor 2, and the lighting effect is more uniform than that of the existing point light source illumination channel 3, thereby being beneficial to improving the image shooting quality.
Wherein, the second sleeve is made of stainless steel, the outer diameter of the second sleeve can be processed into different diameters of 3mm, 4mm, 10mm and the like, and the wall thickness is more than 0 and less than or equal to 0.4 mm.
In different application scenarios, the outer diameters of the second sleeves are different, and when the pipe body includes the first sleeve and the second sleeve, the outer diameters of the pipe bodies listed in table 1 are the outer diameter of the second sleeve in this embodiment, which can specifically refer to the size specifications of the outer diameters of the second sleeves in several specific application scenarios listed in table 1, and can also be set as needed.
In another alternative embodiment, a first optical path 32 and a second optical path 33 are disposed in parallel along an axial direction of the tube, the first optical path and the second optical path are respectively disposed on two sides of the image sensor, and the first optical path and the second optical path form the illumination path.
In particular, a light guide medium is provided in the illumination channel 3, and the light guide medium is used for light conduction. The light guide medium is used for conducting the illumination light, so that the loss in the light conduction process can be reduced, and the illumination light required by image shooting is ensured.
In this embodiment, as an optional embodiment, the light guide medium is connected to a first cold light source connector, the first cold light source connector is connected to a cold light source, and the first cold light source connector is located at or near the second end of the tube body. Therefore, the cold light source is arranged at the second end of the tube body, namely the tail end in application, and is connected to the light guide medium through the cold light source connector, so that on one hand, light can be transmitted to the front end of the tube body through the light guide medium to provide illumination light for image shooting; on the other hand, the cold light source is arranged at the tail end of the tube body, so that the tube body can be made thinner, and the size of the structure of the monocular electronic hard tube endoscope which extends into the human body part is reduced.
Referring to fig. 1, in the present embodiment, specifically, a splitter 12 is connected to the second end, i.e. the end when the second bushing 10 is applied, it should be noted that the splitter is used for separating a plurality of lines passing through the splitter, so as to avoid line entanglement, and is not a concept of a splitter used for separating 8 lines in a network line into two groups to transmit data in the field of network communication technology. The splitter comprises a first splitting port 13 and a second splitting port 14, the tail end of the light guide medium penetrates through the first splitting port 13 to be connected to the cold light source 5, and the other end of the cable 9 is connected to the optical processing device 4 through the second splitting port 14. In this embodiment, the light guide medium may be an optical fiber; or, the light guide medium is a light guide plate; or, the light guide medium is a light guide ink layer sprayed in the light guide channel.
The monocular electronic hard tube endoscope provided by the embodiment of the utility model has a slender tube body part structure, and can be suitable for examination and diagnosis of smaller cavities in human bodies; compared with the mode of arranging the image sensor 2 at the tail end in the prior art, the front end of the tube body is closer to the shooting target, the transmission distance of light rays entering the photosensitive surface of the image sensor is shortened, the problems of color rendering performance reduction, image peripheral deformation, visible angle reduction and image noise increase which are possibly generated in the imaging process can be reduced, and therefore the task amount of subsequent image processing can be reduced.
It should be noted that the terms "upper", "lower", and the like, herein indicate orientations and positional relationships, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. Relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. The term "comprising", without further limitation, means that the element so defined is not excluded from the group consisting of additional identical elements in the process, method, article, or apparatus that comprises the element. As will be appreciated by one of ordinary skill in the art, the situation may be specified.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (13)
1. The monocular electronic hard tube endoscope is characterized by comprising a tube body, wherein an image sensor is arranged at a first end of the tube body, an illumination channel is axially arranged on the tube body, the illumination channel is at least provided with an opening located at the first end of the tube body, and the opening is located on the side portion of the image sensor.
2. The monocular electronic hard tube endoscope according to claim 1, wherein a cylinder base is nested in the tube body, an open slot is formed in the end portion of the cylinder base located at the first end of the tube body, the image sensor is installed in the open slot, a through hole is formed in the bottom of the open slot and reaches the other end portion of the cylinder base, a cable is arranged in the through hole in a penetrating manner, and one end of the cable is connected to the image sensor.
3. The monocular electronic hard tube endoscope according to claim 2, wherein the intersecting line of the open slot and the cylinder base comprises a first rectangle, a second rectangle, a first circular arc and a second circular arc, the first rectangle and the second rectangle are symmetrical about the first axial section of the cylinder base, the first circular arc and the second circular arc are symmetrical about the second axial section of the cylinder base, the first axial section is perpendicular to the second axial section, and the bottom edge of the first rectangle, the bottom edge of the first circular arc, the bottom edge of the second rectangle and the second circular arc are connected in sequence to form a closed inverted-head rectangle.
4. The monocular electronic hard tube endoscope according to claim 1, wherein a first channel is further provided in the tube body along an axial direction of the tube body.
5. The monocular electronic hard tube endoscope according to claim 1, wherein a first channel and a second channel are further provided in the tube body along an axial direction of the tube body.
6. The monocular electronic hard tube endoscope according to claim 4, wherein the image sensor is located at a cross-sectional center position of the tube body; the first passage is eccentrically disposed with respect to an axis of the pipe body.
7. The monocular electronic hard tube endoscope according to claim 5, wherein the image sensor is located at a cross-sectional center position of the tube body; the first channel and the second channel are eccentrically arranged relative to the axis of the tube body, and the first channel and the second channel are adjacently arranged, or the first channel and the second channel are respectively arranged on two sides of the image sensor.
8. The monocular electronic hard tube endoscope of claim 1, wherein the tube body comprises a first sleeve and a second sleeve, the second sleeve is sleeved outside the first sleeve, and a gap is formed between the first sleeve and the second sleeve; the annular space between the outer side surface of the first sleeve and the inner side surface of the second sleeve forms the illumination channel, and the image sensor is arranged at the first end of the first sleeve;
or,
the image sensor is characterized in that a first light path channel and a second light path channel are arranged in parallel in the tube body along the axial direction of the tube body, the first light path channel and the second light path channel are respectively arranged on two sides of the image sensor, and the first light path channel and the second light path channel form the illumination channel.
9. A monocular electronic hard tube endoscope according to claim 1 or 8, wherein a light conducting medium is provided in said illumination channel.
10. The monocular electronic hard tube endoscope according to claim 9, wherein said light guide medium is connected with a first cold light source connector, and a cold light source is connected to said first cold light source connector, and said first cold light source connector is located at or near said second end of said tube body;
the light guide medium is an optical fiber; or,
the light guide medium is a light guide plate; or,
the light guide medium is a light guide ink layer sprayed in the light guide channel.
11. The monocular electronic hard tube endoscope of claim 1, wherein the image sensor is electrically connected to an optical processing device, and a 3D stereoscopic display is connected to an output end of the optical processing device.
12. The monocular electronic hard tube endoscope of claim 1, wherein 0 < the tube body diameter ≤ 11 mm.
13. The monocular electronic hard tube endoscope of claim 1, wherein the image sensor is located in an opening of the illumination channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921217042.5U CN212165756U (en) | 2019-07-30 | 2019-07-30 | Monocular electronic hard tube endoscope |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921217042.5U CN212165756U (en) | 2019-07-30 | 2019-07-30 | Monocular electronic hard tube endoscope |
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| Publication Number | Publication Date |
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| CN212165756U true CN212165756U (en) | 2020-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921217042.5U Active CN212165756U (en) | 2019-07-30 | 2019-07-30 | Monocular electronic hard tube endoscope |
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| CN (1) | CN212165756U (en) |
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