CN113876059B - Anti-droplet device for outpatient treatment - Google Patents

Anti-droplet device for outpatient treatment Download PDF

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Publication number
CN113876059B
CN113876059B CN202111250323.2A CN202111250323A CN113876059B CN 113876059 B CN113876059 B CN 113876059B CN 202111250323 A CN202111250323 A CN 202111250323A CN 113876059 B CN113876059 B CN 113876059B
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China
Prior art keywords
sealing
frame body
air inlet
inlet channel
fixing
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Active
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CN202111250323.2A
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Chinese (zh)
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CN113876059A (en
Inventor
马青
方荣华
李霞
张洁
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West China Hospital of Sichuan University
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West China Hospital of Sichuan University
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Publication of CN113876059A publication Critical patent/CN113876059A/en
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    • AHUMAN NECESSITIES
    • A41WEARING APPAREL
    • A41DOUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/05Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
    • A41D13/11Protective face masks, e.g. for surgical use, or for use in foul atmospheres
    • A41D13/1161Means for fastening to the user's head
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/30Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Abstract

The invention discloses an anti-foam-flying device for outpatient treatment, which comprises: the frame body is applied to the face through a fixing band, and a window is formed in the position, located at the mouth and nose, of the frame body; slots are formed in the top and the bottom of the frame body and penetrate through the window; the protective cover seals the window by being inserted into the slot; the sealing strip is arranged on one side of the frame body close to the face and surrounds the window in a circle; a plurality of sealing balls are arranged in the sealing strip in an inflated manner; the fixing strip is arranged opposite to the sealing strip, and an air inlet channel is arranged inside the fixing strip; the plurality of fixing pipes are arranged on one side of the air inlet channel in a rectangular array, and stretching is completed through increasing of air pressure of the air inlet channel.

Description

Anti-droplet device for outpatient treatment
Technical Field
The invention relates to the technical field of protective devices, in particular to a droplet prevention device for outpatient treatment.
Background
The medical personnel of outpatient treatment need to be in close face-to-face contact with the patient, who is most likely to carry viruses during an epidemic, and during outpatient treatment, it is necessary to prevent the patient's spray from entering the medical personnel's eyes, mouth and nasal cavity.
At present, protective measures for protecting spray mostly adopt a mask, protective clothing, an eye patch and the like, the protective clothing is good in protective effect, but is inconvenient to wear and take off, resources are short, medical staff in ordinary outpatient departments with low risks can unnecessarily wear the protective clothing, but the eye patch and the mask need to be equipped, but measures for protecting through a disposable medical mask are taken, the side sealing effect of the disposable medical mask is not good due to the fact that the tightness of wearing the mask is not high, spray and aerosol are likely to enter a nasal cavity and an oral cavity through gaps between the mask and the face, and the infection probability of the medical staff is increased.
Disclosure of Invention
The invention aims to provide a droplet prevention device for outpatient treatment, which solves the problem that the existing disposable mask is not enough in wearing tightness.
The technical scheme of the invention is as follows:
an anti-entrainment device for outpatient treatment comprising: the frame body is made of foamed rubber and is applied to the face through a fixing band, and a window is formed in the position, located at the mouth and nose, of the frame body; slots are formed in the top and the bottom of the frame body and penetrate to the window; a plurality of protection covers sealing the windows by being inserted into the insertion grooves; the sealing strip is arranged on one side, close to the face, of the frame body and arranged around the window in a circle; a plurality of sealing balls are arranged in the sealing strip in an inflated manner; the fixing strip is arranged on one side, away from the face, of the frame body and opposite to the sealing strip, an air inlet channel is arranged inside the fixing strip, two communicating ports communicated to the inside of the air inlet channel are formed in the fixing strip and are sealed through sealing covers, one communicating port is used for inflating the air inlet channel, and the other communicating port is used for discharging air in the air inlet channel; a plurality of fixed pipes are arranged in a rectangular array one side of the air inlet channel close to the human face is hollow, the other side of each fixed pipe is sealed, the expansion is completed through the increase of the air pressure of the air inlet channel, the sealing strip is pushed onto the human face, the laminating sealing is completed, one end of a reset spring is connected to the center of the inner part of each fixed pipe, and the other end of the reset spring is connected to the other side of the air inlet channel.
Further, the method also comprises the following steps: the two supporting lugs are symmetrically arranged on two sides of the frame body; each supporting lug is sleeved with a rotating shaft, and each rotating shaft is connected with a fixing belt; the magic tape is arranged at two ends of the fixing belts far away from the supporting ears and used for bonding the two fixing belts.
Further, the shield includes: the protective layer is an outer layer, and the ultrathin polypropylene fiber melt-blown material layer is used for contacting the aerosol; the first filter layer is made of melt-blown cloth and is arranged close to the protective layer and used for filtering viruses; the second filter layer is a superfine polypropylene fiber melt-blown material layer and is arranged close to the second filter layer for secondary filtering and adsorption; the inlayer, the laminating people face, non-woven fabrics material, pliable and tough dampproofing.
Furthermore, the sealing ball is made of rubber.
Further, the sealing ball includes: the cavity is arranged inside the sealing ball and is filled with liquid; a plurality of sealing heads, the hillock form sets up on the side of ball sealer, and with the cavity intercommunication works as the ball sealer receives the extrusion back, the liquid of cavity is filled to in the sealing head, makes the sealing head swell.
Furthermore, the fixed pipe is an integrated rubber telescopic rubber pipe.
Furthermore, driving wheels are arranged on the inner sides of the two ends of the slot, the driving wheels are symmetrically arranged on the two inner sides of the slot, the protective cover is clamped between the two driving wheels, and the driving wheels are made of rubber.
Furthermore, a micro motor is connected to a transmission shaft of one of the transmission wheels, power is provided through the micro motor, and the auxiliary protective cover enters the slot.
Further, the method also comprises the following steps: the nose bridge groove is located at the position where the top of the frame body contacts the nose bridge, and the radians of the middle sections of the inserting groove, the fixing strip and the sealing strip are the same as those of the nose bridge groove.
Furthermore, the inner side of the nose bridge groove is provided with a nose bridge inclined plane, and the nose bridge inclined plane is attached to the nose bridge.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the frame body is arranged, the window and the slot are formed in the frame body, the protective cover is positioned between the fixing strip and the sealing strip, the fixing tube is expanded by inflating the fixing strip, the sealing strip is firstly attached to a face, the fixing tube can control the extension length of the fixing tube according to different human face contours of different parts, and the sealing ball in the sealing strip attached to the facial contour starts to be extruded through air pressure to fill the gap position at the contour, so that the tightness of the protective cover is improved, the possibility that aerosol and spray enter the oral cavity and the nasal cavity through the gap is reduced, and the protective performance is higher.
2. According to the invention, the sealing cavity is arranged in the sealing ball, and the sealing heads are communicated with the periphery of the sealing cavity, so that the sealing heads expand during extrusion, small gaps are easily filled, and the sealing effect is better.
3. According to the invention, the driving wheel is arranged in the slot and is driven by the micro motor on the driving wheel, so that the protective cover can be fed more conveniently, and the wearing efficiency is improved.
4. The frame body can be reused after being sterilized, and the protective cover is disposable, so that the probability of infection of medical staff due to viruses carried in residual droplets is reduced.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic diagram of a right-view structure of the present invention;
FIG. 3 is a schematic view of the cross-sectional structure a-a in FIG. 2;
FIG. 4 is a schematic cross-sectional view taken along line b-b in FIG. 2;
FIG. 5 is an enlarged view of the region A in FIG. 2;
FIG. 6 is an enlarged view of the region B in FIG. 2;
FIG. 7 is a schematic view of a sealing ball according to the present invention;
FIG. 8 is a schematic plan view of the sealing ball of FIG. 7;
FIG. 9 is a front view of a schematic of the seal tube of the present invention;
FIG. 10 is a schematic view of the stretched sealing tube of the present invention;
fig. 11 is a schematic structural diagram of embodiment 2 of the present invention.
The nose bridge comprises a frame body 1, a frame body 11, a window 12, a supporting lug 121, a rotating shaft 13, a fixing belt 131, a magic tape 14, an inserting groove 141, an arc section 2, a protective cover 21, a protective layer 22, a first filter layer 23, a second filter layer 24, an inner layer 3, a sealing strip 4, a sealing ball 41, a cavity 42, a sealing head 5, a fixing strip 51, a communicating port 52, an air inlet channel 6, a fixing pipe 61, a reset spring 7, a driving wheel 71, a micro motor 711, a switch 8, a nose bridge groove 81 and a nose bridge inclined plane.
Detailed Description
The following describes in detail an embodiment of the present invention with reference to fig. 1 to 11. In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.
It should be noted that the circuit connections involved in the present invention all adopt a conventional circuit connection manner, and no innovation is involved.
Example 1:
as shown in fig. 1 to 10, an anti-entrainment device for outpatient treatment, comprising: the mask comprises a frame body 1, a plurality of protective covers 2, a sealing strip 3, a fixing strip 5 and a plurality of fixing pipes 6, wherein the frame body 1 is made of foamed rubber and is applied to the face through a fixing strip 13, and as shown in figure 1, a window 11 is formed in the position, located at the mouth and nose, of the frame body 1; as shown in fig. 2, slots 14 are formed in the top and the bottom of the frame body 1, and the slots 14 penetrate through the window 11; the protective cover 2 seals the window 11 by being inserted into the insertion groove 14; as shown in fig. 2, the sealing strip 3 is arranged on one side of the frame body 1 close to the human face and surrounds the window 11 for a circle; a plurality of sealing balls 4 are arranged in the sealing strip 3 in an inflated manner; the fixing strip 5 is arranged on one side of the frame body 1 far away from a human face and is arranged opposite to the sealing strip 3, an air inlet channel 52 is arranged inside the fixing strip 5, two communicating ports 51 communicated to the inside of the air inlet channel 52 are arranged on the fixing strip 5 and are sealed through sealing covers, one communicating port 51 is used for inflating the air inlet channel 52, and the other communicating port 51 is used for discharging gas in the air inlet channel 52; a plurality of fixed pipes 6 are arranged in a rectangular array on one side of the air inlet passage 52 close to the human face, as shown in fig. 9 and 10, each fixed pipe 6 is hollow on one side and sealed on the other side, and the expansion is completed through the increase of the air pressure of the air inlet passage 52, so that the sealing strip 3 is pushed onto the human face to complete the fitting and sealing, one end of a return spring 61 is connected to the center inside the fixed pipe 6, and the other end of the return spring 61 is connected to the other side of the air inlet passage 52.
When the mask is used, the protective cover 2 is inserted into the slot 14 and positioned between the fixing strip 5 and the sealing strip 3, the frame body 1 is attached to the face of a medical worker and fixed through the fixing belt 13, the sealing cover of the communication port 51 is opened, the inflating device is externally connected to ventilate the air inlet channel 52, after the air continuously fills the air inlet channel 52, the fixing pipe 6 is squeezed by air pressure and begins to stretch to one side of the sealing strip 3, after the periphery of the protective cover 2 is clamped, the periphery of the protective cover 2 and the sealing strip 3 are attached to the face contour of the human, the stretching length of each fixing pipe 6 is determined by the face contour in contact with the fixing pipe, the fixing pipe 6 squeezes the sealing strip 3 to enable the sealing ball 4 to begin to be squeezed, the deformation of the sealing ball 4 is determined according to the face contour in contact with the sealing cover, when the air is filled, the periphery of the sealing strip 3 is attached to the face of the medical worker, the inflation is stopped, and the communication port 51 is sealed by the face;
when the device is disassembled, one of the communication ports 51 is opened, air is discharged, the protective cover 2 is taken out, the frame body 1 is written down, and then sterilization is carried out, so that the frame body 1 can be repeatedly used, and the protective cover 2 is a disposable product;
in the case of no protective mask 2, a disposable medical mask may be used instead.
Preferably, in order to improve the fixing effect of the fixing band 13 to the frame 1, the fixing device further includes: the two supporting lugs 12, the rotating shaft 121 and the magic tape 131 are symmetrically arranged at two sides of the frame body 1; each support ear 12 is sleeved with a rotating shaft 121, and each rotating shaft 121 is connected with a fixing belt 13; the magic tapes 131 are disposed on one ends of the two fixing straps 13 far away from the supporting ears 12, and are used for bonding the two fixing straps 13.
When in use, the magic tape 131 is directly used for sticking the two fixing belts 13, and the bonding length of the fixing belts 13 is controlled to control the fixing tightness.
Specifically, the protective cover 2 of the present embodiment includes four protective layers, which are sequentially from outside to inside: the aerosol filter comprises a protective layer 21, a first filter layer 22, a second filter layer 23 and an inner layer 24, wherein the protective layer 21 is an ultrathin polypropylene fiber melt-blown material layer and is used for contacting aerosol droplets, the first filter layer 22 is made of melt-blown cloth and is arranged close to the protective layer 21 and used for filtering viruses, and the second filter layer 23 is an ultrathin polypropylene fiber melt-blown material layer and is arranged close to the second filter layer 22 and used for secondary filtering and adsorption; the inner layer 24 is attached to the face and made of non-woven fabric, is flexible and moistureproof, and is sewn together with four protective layers.
Preferably, in order to further highlight the deformation characteristics of the sealing ball 4, the sealing ball 4 is made of rubber.
Preferably, in order to improve the sealing performance between the sealing balls 4 and improve the degree of conformity between the deformed sealing balls 4 and the human face contour, the sealing balls 4 include: the cavity 41 is arranged inside the sealing ball 4 and is filled with oily liquid, and the sealing heads 42 are arranged inside the cavity 41; the sealing head 42 is hillock-shaped, and is arranged on the side surface of the sealing ball 4, and is communicated with the cavity 41, and when the sealing ball 4 is extruded, the liquid of the cavity 41 is filled into the sealing head 42, so that the sealing head 42 is expanded, and the sealing head 42 is expanded, so that gaps between the sealing balls 4 can be reduced, and gaps between the sealing strips 3 and the human face contour can be filled more effectively.
Preferably, in order to enable the fixing pipes 6 at various positions to reach the stretching length from the human face more effectively, the fixing pipes 6 are integrated rubber stretching rubber pipes.
Preferably, in order to insert the protection cover 2 into the slot 14 more rapidly and seal the window 11, that is, to improve the wearing efficiency, the transmission wheels 7 are arranged on the inner sides of both ends of the slot 14, the transmission wheels 7 are symmetrically arranged on both sides of the inner side of the slot 14, the protection cover 2 is sandwiched between the two transmission wheels 7, and the transmission wheels 7 are made of rubber.
Preferably, the protective cover 2 is further conveniently inserted, so that the wearing efficiency is improved, wherein a micro motor 71 is connected to a transmission shaft of one of the transmission wheels 7, and the micro motor 71 provides power to assist the protective cover 2 to enter the slot 14.
When the protective cover is used, the protective cover 2 only needs to be inserted into the position of the transmission wheel 7, and then the micromotor 71 is controlled to drive the transmission wheel 7 to rotate through the switch 711 arranged on the frame body 1, so that the protective cover 2 is fed inwards.
Example 2:
the difference from example 1 is that:
in embodiment 1, although the slit at the bridge of the nose is sealed by the sealing strip 3, the sealing speed is slow, and in order to increase the sealing speed at the bridge of the nose, as shown in fig. 11, the device for preventing droplets for outpatient therapy in embodiment 2 further includes: nose bridge groove 8, nose bridge groove 8 are located the position department of 1 top contact nose bridge of framework, the radian on the interlude of slot 14, fixed strip 5 and sealing strip 3 with the radian of nose bridge groove 8 is the same.
Preferably, the top surface of the human nose bridge profile is an inclined surface, so as to be more attached to the nose bridge, the inner side of the nose bridge groove 8 is provided with a nose bridge inclined surface 81, and the nose bridge inclined surface 81 is attached to the nose bridge.
Although the preferred embodiments of the present invention have been disclosed, the embodiments of the present invention are not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.

Claims (6)

1. An anti-entrainment device for outpatient therapy, comprising:
the frame body (1) is applied to the face through a fixing belt (13), and a window (11) is formed in the position, located at the mouth and nose, of the frame body (1); slots (14) are formed in the top and the bottom of the frame body (1), and the slots (14) penetrate through the window (11);
a plurality of protection covers (2) sealing the windows (11) by being inserted into the insertion slots (14);
the sealing strip (3) is arranged on one side, close to the face, of the frame body (1) and arranged around the window (11) in a circle; a plurality of sealing balls (4) are arranged in the sealing strip (3) in a filling manner;
the fixing strip (5) is arranged on one side, away from a human face, of the frame body (1) and is opposite to the sealing strip (3), an air inlet channel (52) is arranged inside the fixing strip (5), two communicating ports (51) communicated with the air inlet channel (52) are formed in the fixing strip (5) and are sealed through sealing covers, one communicating port (51) is used for inflating the air inlet channel (52), and the other communicating port (51) is used for discharging air in the air inlet channel (52);
the air inlet channel (52) is arranged on one side, close to a human face, of each fixed pipe (6) in a rectangular array mode, one side of each fixed pipe (6) is hollow, the other side of each fixed pipe is sealed, stretching is completed through increasing of air pressure of the air inlet channel (52) and used for enabling the sealing strips (3) to be pushed onto the human face to complete attaching and sealing, one end of a reset spring (61) is connected to the center of the inside of each fixed pipe (6), and the other end of the reset spring (61) is connected to the other side of the air inlet channel (52);
the sealing ball (4) is made of rubber, and the sealing ball (4) comprises: the sealing ball comprises a cavity (41) and a plurality of sealing heads (42), wherein the cavity (41) is arranged inside the sealing ball (4) and is filled with liquid; the sealing heads (42) are in a hill shape, the sealing heads (42) are arranged on the side surface of the sealing ball (4) and are communicated with the cavity (41), and when the sealing ball (4) is squeezed, liquid in the cavity (41) is filled into the sealing heads (42) to enable the sealing heads (42) to swell;
the inner sides of two ends of the slot (14) are respectively provided with a driving wheel (7), the two surfaces of the inner side of the slot (14) are symmetrically provided with the driving wheels (7), the protective cover (2) is clamped between the two driving wheels (7), and the driving wheels (7) are made of rubber;
a transmission shaft of one of the transmission wheels (7) is connected with a micro motor (71), power is provided through the micro motor (71), and the auxiliary protective cover (2) enters the slot (14).
2. The device of claim 1, further comprising:
the two supporting lugs (12) are symmetrically arranged on two sides of the frame body (1);
each supporting lug (12) is sleeved with a rotating shaft (121), and each rotating shaft (121) is connected with a fixing belt (13);
magic tapes (131) are arranged at one ends of the two fixing bands (13) far away from the supporting ears (12) and used for bonding the two fixing bands (13).
3. The device for outpatient treatment against entrainment according to claim 1, characterized in that said protective cover (2) comprises:
the protective layer (21), the outer layer, the ultra-thin polypropylene fiber melts the material layer, is used for contacting the aerosol of the spray;
the first filter layer (22) is made of melt-blown cloth and is arranged close to the protective layer (21) and used for filtering viruses;
the second filter layer (23) is a superfine polypropylene fiber melt-blown material layer, is arranged close to the first filter layer (22) and is used for filtering and adsorbing again;
the inner layer (24) is attached to the face of a person and made of non-woven fabric, flexible and moisture-proof.
4. The device for the outpatient treatment of anti-entrainment according to claim 1, wherein said fixed tube (6) is an integral rubber hose.
5. The device of claim 1, further comprising:
the nose bridge groove (8) is located at the position where the top of the frame body (1) contacts the nose bridge, and the radian of the middle sections of the inserting groove (14), the fixing strip (5) and the sealing strip (3) is the same as that of the nose bridge groove (8).
6. The device for outpatient treatment and anti-entrainment according to claim 5, wherein a nose bridge ramp (81) is provided on the inner side of the nose bridge groove (8), the nose bridge groove ramp (81) being provided to follow the bridge of the nose.
CN202111250323.2A 2021-10-26 2021-10-26 Anti-droplet device for outpatient treatment Active CN113876059B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111250323.2A CN113876059B (en) 2021-10-26 2021-10-26 Anti-droplet device for outpatient treatment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111250323.2A CN113876059B (en) 2021-10-26 2021-10-26 Anti-droplet device for outpatient treatment

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CN113876059A CN113876059A (en) 2022-01-04
CN113876059B true CN113876059B (en) 2023-04-07

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102178362A (en) * 2011-05-06 2011-09-14 莱芜钢铁集团有限公司 Dust protecting mask
CN206760824U (en) * 2017-04-13 2017-12-19 苏州市吴中区甪直明达漂染厂 A kind of cotton yarn mouth mask being easily changed
CN111150149A (en) * 2020-03-08 2020-05-15 郑州大学第一附属医院 Medical mask with protective layer capable of being replaced at any time
CN111345535A (en) * 2020-04-24 2020-06-30 四川大学华西医院 Medical isolation protection sterile cap
CN112043020A (en) * 2020-08-20 2020-12-08 钱继红 Intelligent wearing auxiliary method and system based on mask protection
KR20210001889A (en) * 2019-06-28 2021-01-06 (주)경도상사 Full Face Mask of View Replacement Type
CN212325455U (en) * 2020-03-23 2021-01-12 合肥龙图腾健康管理有限公司 Inflatable mask

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11484734B2 (en) * 2013-09-04 2022-11-01 Octo Safety Devices, Llc Facemask with filter insert for protection against airborne pathogens

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102178362A (en) * 2011-05-06 2011-09-14 莱芜钢铁集团有限公司 Dust protecting mask
CN206760824U (en) * 2017-04-13 2017-12-19 苏州市吴中区甪直明达漂染厂 A kind of cotton yarn mouth mask being easily changed
KR20210001889A (en) * 2019-06-28 2021-01-06 (주)경도상사 Full Face Mask of View Replacement Type
CN111150149A (en) * 2020-03-08 2020-05-15 郑州大学第一附属医院 Medical mask with protective layer capable of being replaced at any time
CN212325455U (en) * 2020-03-23 2021-01-12 合肥龙图腾健康管理有限公司 Inflatable mask
CN111345535A (en) * 2020-04-24 2020-06-30 四川大学华西医院 Medical isolation protection sterile cap
CN112043020A (en) * 2020-08-20 2020-12-08 钱继红 Intelligent wearing auxiliary method and system based on mask protection

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