CN111437528B - Disposable nose umbrella utensil for medical protection - Google Patents
Disposable nose umbrella utensil for medical protection Download PDFInfo
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- CN111437528B CN111437528B CN202010281393.3A CN202010281393A CN111437528B CN 111437528 B CN111437528 B CN 111437528B CN 202010281393 A CN202010281393 A CN 202010281393A CN 111437528 B CN111437528 B CN 111437528B
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- umbrella
- nasal
- component
- medical protection
- medical
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Classifications
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B7/00—Respiratory apparatus
- A62B7/10—Respiratory apparatus with filter elements
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
- A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
- A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
- A41D13/1107—Protective face masks, e.g. for surgical use, or for use in foul atmospheres characterised by their shape
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B23/00—Filters for breathing-protection purposes
- A62B23/06—Nose filters
Abstract
The invention belongs to the field related to medical protection equipment, and discloses a disposable nasal umbrella appliance for medical protection, which comprises an umbrella stand component, an umbrella cover component and a connecting component, wherein the whole umbrella stand component is processed into a hollow thin shell structure by a flexible water-absorbing material, and is designed into a structure body structure with a cross section which is approximately arched; the umbrella cover component is connected with the umbrella stand component in an integrated sealing way and comprises a filtering cover surface for providing a pathogenic microorganism filtering function and an isolation structure for enabling the umbrella cover component to integrally cover the external nostrils; the connecting component is used for connecting the umbrella cover components positioned in each nostril. Compared with the existing products, the invention not only can provide medical protection with high sealing performance and reliability, but also has more reasonable aerodynamic characteristics, and correspondingly achieves obvious improvement on the aspects of maintaining good ventilation effect and using comfort.
Description
Technical Field
The invention belongs to the field related to medical protection equipment, and particularly relates to a disposable nasal umbrella appliance for medical protection, which is suitable for providing reliable medical protection with high sealing performance in the occasions of disease diagnosis, treatment, nursing and the like, and can effectively play a role in gently expanding nasal wings, so that the nasal cavity is more in line with aerodynamics during breathing, and the ventilation effect with better comfort is ensured.
Background
In the operation process of medical diagnosis, treatment, nursing and the like, necessary protection needs to be provided for medical staff, patients and the like; for this purpose, products such as medical protective masks are usually provided. However, the comfort, convenience and safety of protective articles have not been fully exploited. For example, users often get into the embarrassment of being forced to take off the mask and lose protection when eating and drinking water; or when the mask is not properly worn by an improper operation, there is a risk that bacterial virus in the air enters the nasal cavity through the gap between the mask and the face.
It was found that, in addition to protective articles such as medical masks, some products for nasal protection are disclosed in the prior art such as CN201320467395.7, CN200410037363.9 and CN201420121274.1, which can work well together with masks by being worn in the nasal cavity.
However, further studies have shown that the above-mentioned nasal protection products still suffer from the following drawbacks or drawbacks:
first, from the product application, the existing nose protection product is mainly designed for daily life filtration such as dust prevention, and is generally an appliance suitable for repeated use, or a filter part needs to be replaced when the nose protection product is used again. However, when such nasal protective products are used in medical diagnosis, treatment, nursing and other operation processes, effective protection against pathogenic microorganisms cannot be achieved in practice, and protective products such as respiratory infectious diseases are obviously not reusable or complicated disinfection treatment is adopted, so that new coronavirus pneumonia diseases are developed recently.
Secondly, from the structural characteristics of the product, the main body of the existing nose protection product is usually an accommodating space with openings at two ends, the accommodating space is placed in a nasal cavity, and a replaceable filter layer is arranged in the accommodating space to play a role in filtering. However, on one hand, the filter component and the accommodating component of the nasal protection product are not integrally designed, and the whole tightness has defects; on the other hand, the arrangement mode of the filtering component and the structural design of the accommodating space are not safely and reasonably attached to the biological structure of the nasal cavity in the breathing process, so that the special filtering requirements of pathogenic microorganisms and the like cannot be effectively met.
Thirdly, from the working mechanism of the product, the product needs to have better aerodynamic characteristics after entering the nasal cavity to maintain good ventilation effect, but the existing product does not give enough consideration in this aspect. In particular, it has been found in practice that respiratory tract infections such as new coronavirus pneumonia often present or potentially present themselves to some extent as a result of respiratory tract infections, suspected respiratory tract infections or close contact with respiratory tract infections. In this situation, there is also an urgent practical need for providing better wearing comfort and higher ventilation in addition to providing safe and reliable pathogenic microorganism filtration function.
Accordingly, how to more conveniently and efficiently solve the above-mentioned various needs is becoming one of the technical problems to be solved urgently in the field of medical protection, especially in the process of novel coronavirus epidemic prevention.
Disclosure of Invention
In view of the above drawbacks and needs of the prior art, it is an object of the present invention to provide a disposable nasal umbrella device for medical protection, wherein the overall structural components of the nasal protection product are redesigned by closely combining the specific requirements of the application such as pathogenic microorganism protection, and the umbrella frame structure as the key component is further improved from multiple aspects such as specific shape, arrangement mode and working mechanism, so as to provide not only medical protection with high sealing performance and reliability, but also practical tests show that the effective ventilation cross-sectional area of one side of the nasal umbrella implanted into the nasal vestibule can be maintained at 0.74cm2Above, possess more reasonable aerodynamic characteristics, correspondingly obtained obvious improvement in the aspect of maintaining good ventilation effect and use travelling comfort.
According to the present invention, there is provided a disposable nasal umbrella device for medical protection, comprising:
the umbrella stand component is integrally made of flexible water-absorbing materials, is processed into a hollow thin shell structure, and is placed in a single nasal cavity to form a flow path for air to enter and exit the nasal cavity; in addition, the umbrella stand component is designed into a structural body with a roughly arched cross section, the chord-shaped surface part of the arched structural body is used for keeping fit with the columella side of the nasal vestibule, the sector-shaped surface part of the arched structural body gradually expands towards the periphery for keeping fit with the nasal alar side, and a supporting surface is arranged between the chord-shaped surface part and the sector-shaped surface part;
the umbrella cover component and the front edge part of the umbrella stand component are integrally and hermetically connected with the part corresponding to a single nostril, and comprises a filtering cover surface and an isolating structure; the size of the isolation structure is slightly larger than the front edge part of the umbrella stand component, and the isolation structure is used for integrally covering external nostrils and ensuring that the umbrella cover component cannot be sucked into the nasal vestibule in the using process;
and the two ends of the connecting component are respectively connected with the inner side edges of the umbrella surface components positioned in the nostrils.
By the conception, when the integrated nose umbrella device is worn in the nasal cavity, the invention can bring the following technical improvements and effect combinations:
on one hand, for the umbrella frame component which is one of key components and forms the gas flow passage, as the umbrella frame component is designed into a structure body with a cross section which is approximately arched and is processed into a hollow thin shell, the integral structural form and the arrangement mode can be more reasonably attached to a physiological area between an external nostril opening and a narrowest nasal area, accordingly, not only can more convenient wearing operability and safer sealing performance be provided, but also the hollow thin shell structure can play a role in supporting and gently expanding a nasal wing part and effectively relieve the breathing discomfort caused by the resistance of umbrella fabric filtration; in addition, the umbrella stand assembly is designed in such a way that the rear edge part of the umbrella stand assembly does not exceed a narrow nasal area and does not contact the nasal mucosa part behind the nasal area, and the sectional area of the hollow part of the arch structure can be kept at 0.74cm according to the estimation of the normal nasal parameters of a human body2The comfort and the air permeability when the nasal cavity medical protection is used are correspondingly and obviously improved, and meanwhile, the flexible water-absorbing material is also beneficial to maintaining the humidity of the air passage and enhancing the nonspecific defense capacity of the upper respiratory tract in the respiratory infectious disease prevention and control;
on the other hand, as for the umbrella fabric component as another key component, because the umbrella fabric component adopts the filter cover surface with the function of filtering pathogenic microorganisms, the safety is better, and the umbrella fabric component is more suitable for preventing and controlling respiratory infectious diseases such as new coronavirus infection; because the nasal umbrella and the umbrella stand assembly are integrally sealed and processed and have an isolation structure, the nasal umbrella can effectively cover the whole external nostril, and the skin and the mucous membrane of the nasal cavity can be prevented from being exposed outside the filter membrane while the nasal umbrella is ensured not to be inhaled into the nasal vestibule;
finally, the nasal umbrella device is designed integrally and is used as a disposable medical protective appliance, does not need repeated disinfection, and is more suitable for preventing and controlling respiratory infectious diseases such as new coronavirus infection.
As a further preference, for the umbrella stand assembly, the arch structure thereof is preferably provided with a local expansion structure or a local thickening structure at a position corresponding to the upper end of the nasal columella adjacent to the nasal tip; in addition, a protruding structure is preferably provided at a portion corresponding to the soft triangle at the lower end of the columella. Correspondingly, through this optimal design, can effectively be directed against some specific areas in the nasal cavity, when avoiding wearing uncomfortable feeling, effectively provide the anticreep function, further ensure the security.
As a further preference, for the umbrella frame assembly, the maximum thickness of its arcuate formations is preferably from 2mm to 3 mm. Accordingly, with this preferred design, the dimensional specification parameters ensure that the minimum cross-sectional area of the hollow region, i.e. the cross-sectional area for effective ventilation of a single nasal cavity, is maintained at 0.74cm2Therefore, the aerodynamic characteristics of the air conditioner are more reasonable.
As a further preference, the umbrella frame assembly is preferably made entirely of medical sponge and is processed into a hollow thin shell structure. Accordingly, through the preferred design, not only can the umbrella stand assembly which is low in cost and convenient to process be provided, but also the medical sponge can better absorb a small amount of liquid or medicine, keep the nasal cavity moist and improve the defense capacity of the upper respiratory tract.
As a further preference, for said canopy assembly, its outside of the filter mat is preferably provided with slightly deformable folds. Correspondingly, through the optimized design, the umbrella cover is slightly sunken into nostrils in the air suction process, the air suction process is well sealed, and pathogenic microorganisms are further prevented from entering the nasal cavities.
As a further preference, for said canopy assembly, its outside of the filter mat is preferably provided with attachment means. Accordingly, the optimized design facilitates the operation of taking out or fixing during the use process.
As a further preference, for said canopy assembly, its filter cover is made of the same material that complies with the production standard for N95 medical masks. Correspondingly, through the optimized design, the protection of pathogenic microorganisms can be effectively provided, and the filter layer is made of the same material as the medical mask and is suitable for protecting respiratory infectious diseases such as new coronavirus infection.
As a further preference, the umbrella cover component can adopt biological glue to be attached to the external nostrils, or extend to different shapes or arrange an additional structure, thereby further enhancing the fixation and the tightness with the external nostrils.
As a further preferred, said canopy assembly is integrally and sealingly connected to said frame assembly.
Further preferably, the connection component is preferably made of the same material as the umbrella cover component.
On the whole, compared with the prior art, according to the technical scheme of the invention, through the design improvement of the integral structural composition and key components of the nasal protection product, the nasal protection product can more pertinently meet various requirements in the field of medical protection, can be more reasonably attached to a physiological area between an external nostril opening and a narrowest nasal area, can also play a role in supporting and mildly expanding a flexible material at a nasal wing part, and effectively relieves respiratory discomfort caused by resistance filtered by an umbrella cover; in addition, the disposable respiratory infectious disease prevention and control system also has the advantages of disposable use, integrated processing, low cost, convenient use and the like, thereby being particularly suitable for respiratory infectious disease prevention and control application occasions such as new coronavirus.
Detailed Description
As specifically analyzed in the "background of the invention" section above, prior art nasal protective products have not been fully developed for comfort, convenience and safety, and have been difficult to meet the various needs of respiratory infectious disease control applications such as the new coronavirus. Therefore, the invention closely combines the technical requirements, and correspondingly develops a novel disposable nasal umbrella appliance for medical protection through deep research on the internal structure physiological characteristics of the nasal cavity of a human body, which is not only suitable for providing reliable medical protection with high sealing performance in the occasions of disease diagnosis, treatment, nursing and the like, but also can effectively play a role of gently expanding nasal wings, so that the nasal cavity is more in line with aerodynamics during breathing, and the ventilation effect with better comfort is ensured.
The disposable nasal umbrella device provided by the invention is characterized by comprising:
the umbrella stand component is integrally made of flexible water-absorbing materials, is processed into a hollow thin shell structure, and is placed in a single nasal cavity to form a flow path for air to enter and exit the nasal cavity; in addition, the umbrella stand component is designed into a structural body with a roughly arched cross section, the chord-shaped surface part of the arched structural body is used for keeping fit with the columella side of the nasal vestibule, the sector-shaped surface part of the arched structural body gradually expands towards the periphery for keeping fit with the nasal alar side, and a supporting surface is arranged between the chord-shaped surface part and the sector-shaped surface part;
the umbrella cover component and the front edge part of the umbrella stand component are integrally and hermetically connected with the part corresponding to a single nostril, and comprises a filtering cover surface and an isolating structure; the size of the isolation structure is slightly larger than the front edge part of the umbrella stand component, and the isolation structure is used for integrally covering external nostrils and ensuring that the umbrella cover component cannot be sucked into the nasal vestibule in the using process;
and the two ends of the connecting component are respectively connected with the inner side edges of the umbrella surface components positioned in the nostrils.
The disposable nasal umbrella device product is explained in more detail below.
The umbrella stand part is designed into a structural body with a roughly arched cross section and is composed of a hollow thin shell made of flexible materials and capable of absorbing water, and the hollow thin shell made of flexible materials not only constructs a flow path of air entering and exiting a nasal cavity, but also can play a role in gently expanding nasal wings; wherein, the chord surface of the arch structure body is used for keeping fit with the nasal cavity cartilage part, namely the side of the columella nasi of the nasal vestibule; the sector is placed on the side of the nose wing, gradually expands towards the periphery and is attached to the nose wing, and the anti-falling function can be achieved.
The umbrella cover part is connected with the part of the umbrella frame part, which is positioned at the nostril in a sealing way, and is provided with a filter cover surface for carrying out targeted filtration on gas. The umbrella stand is in contact with the umbrella stand, the umbrella face is slightly larger than the umbrella stand, so that the nasal umbrella cannot be sucked into the nasal vestibule on one hand, and the skin and mucous membrane of the nasal cavity are not exposed outside the filter membrane on the other hand. The umbrella surface is provided with folds to facilitate slight deformation, and the umbrella surface can be slightly sunken into nostrils during air suction to ensure the sealing performance of the filter layer.
The connecting portion is used to connect the inner edges of the two sides of the umbrella cover, such as by using elastic strings, and the connecting portion can also be made of the same material as the umbrella cover. The device plays a role in connection and fixation, and prevents the nasal umbrella from being inhaled into the nasal cavity when the nasal umbrella is vigorously inhaled.
According to a preferred embodiment of the invention, in order to provide the anti-falling function more effectively and further ensure the safety, the flexible material of the umbrella stand can be thickened or raised at some parts to adapt to the shape of the nasal vestibule. For example, the flexible shell of the columella nasi close to the upper end of the nose tip is enlarged and thickened, so that the anti-falling function is further realized; the soft three corners at the lower end of the columella nasi can be provided with bulges, and the anti-falling function can be effectively achieved. Furthermore, there may preferably be a support surface from the midpoint of the chordal side to the opposite side of the fan to avoid collapse of the housing.
According to another preferred embodiment of the invention, the hollow water-absorbable flexible material 'shell' with a roughly arched cross section is an umbrella stand which can be plugged into the nasal vestibule to play a role in fixation, most of the shell is about 2mm-3mm thick, and part of the shell is thickened or raised to adapt to the shape of the nasal vestibule so as to be convenient for fixation. The umbrella frame plays a role in fixing, the tail end of the device does not exceed the rear end of the nasal vestibule, namely the narrowest nasal area position, and a plurality of practical tests show that the structural design can ensure that the minimum cross section of the hollow part, namely the effective ventilation sectional area of the unilateral nasal cavity, is kept at 0.74cm2Therefore, the aerodynamic characteristics of the air conditioner are more reasonable.
According to another preferred embodiment of the invention, the umbrella surface is slightly larger than the umbrella frame, so that the nasal umbrella is ensured not to be absorbed into the nasal vestibule; the umbrella fabric is provided with folds which are convenient for slight deformation, and the umbrella fabric can be slightly sunk into nostrils to ensure the sealing performance of the filter layer when in use. The design that the shell gradually increases from small to large and the part of the shell is provided with the bulge ensures that the nasal umbrella is not easy to fall off when the nasal cavity exhales. When in use, the arched string side is placed at the columella side of nasal vestibule, and the fan-shaped part is placed at the alar side of nose. And a support surface is arranged from the midpoint of the chord side to the opposite side of the fan shape to avoid the collapse of the shell. In addition, the flexible water-absorbable material can absorb a small amount of liquid or medicine, keep the nasal cavity moist and improve the defense capacity of the upper respiratory tract.
In addition, the outer surface of the canopy portion may be provided with folds for deforming before use or for facilitating removal of the nasal umbrella apparatus. The umbrella cover can also be used for generating some attachments, so that the umbrella cover can be conveniently taken out or fixed.
According to another preferred embodiment of the present invention, said canopy portion is slightly larger than the cross-section of the nostril and the nose bridge in contact therewith. Wherein, the umbrella face can adopt biological glue class and outer nostril laminating, increases leakproofness. The umbrella surface can also extend in different shapes or add devices, so that the fixation and the sealing performance with external nostrils are further enhanced.
In conclusion, the disposable nasal umbrella device product can effectively meet the medical protection purpose of respiratory infectious diseases and the like, and simultaneously achieves obvious improvement on the aspects of maintaining good ventilation effect and using comfort. The product has the following main technical characteristics in the whole aspect:
1. the cross section of the umbrella stand component used as an air channel is approximately an arched thin shell, and part of the umbrella stand component is attached to the nasal vestibule and has thickening and protrusion functions;
2. the umbrella stand component is made of flexible water-absorbing materials into a hollow thin shell, plays a role in fixing, supporting and absorbing liquid or medicine, plays a role in gently expanding external nostrils, and is beneficial to providing a good aerodynamic effect; the support can be realized in different modes, and the cross section is set to be the lowest value so as to ensure that good aerodynamics can be met;
3. the umbrella cover component which plays a role in filtering can be approximately arched and covers and is slightly larger than the external nostrils, so that the external nostrils can be completely covered when the umbrella cover component inhales; meanwhile, the mask material can be adopted, so that the reliable filtering effect on pathogenic microorganisms is provided, and the application of other materials to different approaches is not excluded;
4. the surface of the umbrella cover component is provided with folds which are beneficial to deformation, and the umbrella cover component can slightly sink when breathing in to enhance the sealing performance, wherein the umbrella cover is not excluded to be provided with bulges and other vegetation facilities;
5. the umbrella cover component can extend into different shapes or the protrusions play a role in strengthening and fixing, and the nose umbrella extension can play a role in fixing by adding facilities or modes (such as biological glue); the manufacturing size of the product can be correspondingly adjusted according to different ages and races;
6. the connecting part is connected with the nasal umbrellas at the two sides and can be connected by an elastic string; wherein, the umbrella covers can be connected by the same material of the umbrella covers, without excluding other connection modes.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. A disposable nasal umbrella device for medical protection, comprising:
the umbrella stand component is integrally made of flexible water-absorbing materials, is processed into a hollow thin shell structure, and is placed in a single nasal cavity to form a flow path for air to enter and exit the nasal cavity; in addition, the umbrella stand component is designed into a structural body with an arched cross section, a chord-shaped surface part of the arched structural body is used for keeping fit with the columella side of the nasal vestibule, a sector-shaped surface part of the arched structural body gradually expands towards the periphery for keeping fit with the nasal alar side, and a supporting surface is arranged between the chord-shaped surface part and the sector-shaped surface part;
the umbrella cover component and the front edge part of the umbrella stand component are integrally and hermetically connected with the part corresponding to a single nostril, and comprises a filtering cover surface and an isolating structure; wherein the filter cover surface is used for providing pathogenic microorganism filtering function for the circulation path of air entering and exiting the nasal cavity, and the outer side of the filter cover surface is provided with folds which can be slightly deformed; the size of the isolation structure is slightly larger than the front edge part of the umbrella stand component, and the isolation structure is used for integrally covering the external nostrils and ensuring that the umbrella cover component cannot be sucked into the nasal vestibule in the use process;
the connecting assembly is an elastic rope-shaped body, and two ends of the connecting assembly are respectively connected with the inner side edges of the umbrella surface assemblies positioned in the nostrils;
in addition, for the umbrella stand component, the arch structure body is provided with a local expansion structure or a local thickening structure at the position corresponding to the upper end of the nasal columella adjacent to the nasal tip; the part corresponding to the soft triangle at the lower end of the columella nasi is provided with a protruding structure.
2. A disposable nasal umbrella device for medical protection according to claim 1, wherein the maximum thickness of the arched structure of the umbrella frame assembly is 2mm to 3 mm.
3. The disposable nasal umbrella device for medical protection according to claim 1 or 2, wherein the umbrella frame assembly is integrally made of medical sponge and is processed into a hollow thin shell structure.
4. A disposable nasal umbrella device for medical protection according to claim 3, wherein the canopy assembly is provided with attachment means on the outside of the filter mat.
5. A disposable nasal umbrella device for medical protection according to claim 1 or 2, wherein the umbrella cover component is made of the same material as that of the N95 medical mask.
6. The disposable nasal umbrella device for medical protection according to claim 1 or 2, wherein the umbrella cover component adopts biological glue to be attached to the external nostrils, or extends to different shapes or is provided with an additional structure, thereby further enhancing the fixation and the sealing performance with the external nostrils.
7. A disposable nasal umbrella device for medical protection according to claim 1 or 2, wherein the connecting member is made of the same material as the canopy member.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010281393.3A CN111437528B (en) | 2020-04-10 | 2020-04-10 | Disposable nose umbrella utensil for medical protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010281393.3A CN111437528B (en) | 2020-04-10 | 2020-04-10 | Disposable nose umbrella utensil for medical protection |
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| Publication Number | Publication Date |
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| CN111437528A CN111437528A (en) | 2020-07-24 |
| CN111437528B true CN111437528B (en) | 2021-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010281393.3A Active CN111437528B (en) | 2020-04-10 | 2020-04-10 | Disposable nose umbrella utensil for medical protection |
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| CN208582820U (en) * | 2018-01-26 | 2019-03-08 | 陈佳琦 | A kind of double form of nasal inhalers |
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| US4686976A (en) * | 1984-11-28 | 1987-08-18 | Bakkila Charles A | Safety mask |
| CN2409992Y (en) * | 2000-03-27 | 2000-12-13 | 广州军区联勤部军事医学研究所 | Miniature respiratory protector |
| CN201618333U (en) * | 2009-12-10 | 2010-11-03 | 张慧涛 | Hidden nosepiece |
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| CN204815218U (en) * | 2013-10-17 | 2015-12-02 | 王雷 | Nose filter |
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| CN103656913A (en) * | 2013-12-26 | 2014-03-26 | 彭健智 | Nose filter |
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| CN103816622A (en) * | 2014-02-27 | 2014-05-28 | 成都市康飞药业有限公司 | Bionic nasal plug |
| CN203802992U (en) * | 2014-04-14 | 2014-09-03 | 余莉娅 | Nose plug type air purifier |
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| CN208582820U (en) * | 2018-01-26 | 2019-03-08 | 陈佳琦 | A kind of double form of nasal inhalers |
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| Publication number | Publication date |
|---|---|
| CN111437528A (en) | 2020-07-24 |
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