WO2021179444A1 - 一种新型防护口罩 - Google Patents

一种新型防护口罩 Download PDF

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Publication number
WO2021179444A1
WO2021179444A1 PCT/CN2020/093182 CN2020093182W WO2021179444A1 WO 2021179444 A1 WO2021179444 A1 WO 2021179444A1 CN 2020093182 W CN2020093182 W CN 2020093182W WO 2021179444 A1 WO2021179444 A1 WO 2021179444A1
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WO
WIPO (PCT)
Prior art keywords
filter
mask
filter cover
new type
cover
Prior art date
Application number
PCT/CN2020/093182
Other languages
English (en)
French (fr)
Inventor
余宾
张建超
常省委
姬永磊
赵景凯
王明辉
Original Assignee
河南驼人贝斯特医疗器械有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202020294324.1U external-priority patent/CN211983910U/zh
Priority claimed from CN202020295141.1U external-priority patent/CN211983912U/zh
Priority claimed from CN202020755275.7U external-priority patent/CN212545686U/zh
Priority claimed from CN202010388866.XA external-priority patent/CN111450636A/zh
Application filed by 河南驼人贝斯特医疗器械有限公司 filed Critical 河南驼人贝斯特医疗器械有限公司
Publication of WO2021179444A1 publication Critical patent/WO2021179444A1/zh

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Classifications

    • 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
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/02—Layered materials
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/04—Materials specially adapted for outerwear characterised by special function or use
    • A41D31/18—Elastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms

Definitions

  • the invention relates to the field of protective articles, in particular to a new type of protective mask.
  • the main pneumonia transmission routes of the new type of coronavirus infection that can be determined are direct transmission, aerosol transmission and contact transmission.
  • protective gear In order to protect the health of front-line medical staff, protective gear must be worn.
  • the masks commonly used by clinical medical staff have the same size and specifications, and cannot adapt to different face shapes. The deformed masks have a reduced protective effect and will cause discomfort to the wearer.
  • wearing a mask alone cannot protect the eyes at the same time in clinical practice. It is often necessary to wear multiple protective equipment at the same time, which makes the wearing process cumbersome.
  • the purpose of the present invention is to provide a new type of protective mask to solve the problem that the existing mask cannot adapt to different face shapes and cannot prevent splashing.
  • a new type of protective mask including a mask body, the size of the mask body matches the size of the human mouth and nose, and ventilation is formed between the mask body and the user's mouth and nose.
  • the mask body is made of soft elastic materials, such as silica gel, rubber, soft PVC, etc., with the side of the mask body close to the user’s face as the inner side, and the inner tail of the mask body is curved and curled toward the inner side of the mask body.
  • the inner tail circumference of the mask body is attached to the user’s face; both sides of the mask body are provided with fixing belts, the mask body is provided with ventilation openings, and the ventilation openings are installed with filter components.
  • the filter components include filter membranes and The filter cover;
  • the filter cover includes a filter cover body, the filter cover body adopts a structure formed by a plurality of ribs connected in a mesh shape, and the first vent holes are formed between the different ribs, and the first vent holes cover the entire filter cover body ;
  • the filter cover body is connected to the ventilation opening of the mask body through an interference fit, the upper surface of the filter cover body is installed with a filter membrane, and the outside of the filter cover is also installed with a blowout cover.
  • an eye protection screen is installed on the filter cover.
  • the lower part of the eye protection screen is provided with fixed holes, the shape of the fixed holes matches the outer circumference of the filter cover, at least three fixed splints are provided on the filter cover along the circumferential direction, and the eye protection screen is inserted into the fixed splints In the plug-in gap formed between the blowout prevention cover and the blowout prevention cover.
  • the fixing splint includes a guide part and a clamping part, the insertion gap between the guide part and the blowout preventer is greater than or equal to the thickness of the goggles, and the insertion gap between the clamping part and the blowout preventer is smaller than the protective cover.
  • the thickness of the eye screen, the clamping part and the eye screen have an interference fit.
  • a guide chamfer is provided on the circumference of one side of the fixing splint close to the blowout prevention cover.
  • a snap ring is connected to the air exchange port, an upper chuck table and a lower chuck table are connected to the outer circumference of the filter cover body, an annular groove is formed between the upper chuck table and the lower chuck table, and the free end of the snap ring is interference fit In the ring card slot.
  • a protrusion is provided on the snap ring, a positioning groove is provided on the lower clamping platform in a radial direction, and the protrusion is fitted in the positioning groove.
  • the inner tail of the mask body is suspended and the thickness of the inner tail of the mask body gradually becomes thinner from the outside to the inside.
  • both sides of the nose part of the mask body are concave.
  • reinforcing ribs are provided on the mask body.
  • the top circumference of the filter cover body is externally connected with an annular step, and the filter membrane covers the upper surface of the filter cover body and is fixedly connected above the annular step.
  • a second vent hole is formed between the two clamping posts, and the top of the clamping post is hook-shaped;
  • the bottom circumference of the inner wall of the blowout prevention cover is provided with a plurality of buckling parts for mating with the filter cover.
  • the shaped rib is clamped on the hook-shaped end of the clamping column, and the inner wall of the spray prevention cover is connected with a plurality of limiting bosses for limiting the relative distance between the spray prevention cover and the filter cover.
  • the distance from the top surface of the hook-shaped end of the clamp column to the annular step is greater than the distance from the top surface of the filter membrane to the annular step
  • the blowout prevention cover has a concave structure
  • a gas circulation space is formed between the blowout prevention cover and the filter membrane.
  • the two sides of the buckling part are respectively fixedly connected with limit stoppers for circumferentially limiting the clamping column.
  • it also includes a mask shell, the mask body is detachably installed in the mask shell, the overall contour of the mask shell is consistent with the human face, and the bottom circumference of the mask shell is provided with a seal for sealing the mask shell to the user's face
  • a gas space is formed between the mask shell and the user's face, and an air outlet is provided in the middle of the mask shell, and the air outlet is communicated with the ventilation opening of the mask body.
  • the mask body is detachably connected to the air outlet of the mask shell through a ferrule.
  • the ferrule includes an outer ring sleeve and an inner ring that are coaxially arranged.
  • a mounting slot is provided between the outer ring sleeve and the inner ring.
  • the mask A snap ring is connected to the ventilation opening of the body, the snap ring is snapped into the installation slot, and the outer ring sleeve is sleeved on the air outlet of the mask shell.
  • the inner ring of the ferrule is provided with a first positioning groove along the radial direction
  • the snap ring is provided with a first protrusion
  • the first protrusion is fitted in the first positioning groove in cooperation with the outer ring of the ferrule
  • a second positioning groove is opened along the axial direction
  • a connecting ring is arranged inwardly at the air outlet of the mask shell
  • the outer ring is sleeved on the connecting ring
  • the connecting ring is provided with a second protrusion that matches with the second positioning groove.
  • the filter cover body is connected to the connecting ring at the air outlet of the mask shell by interference fit.
  • the lower circumference of the filter cover body is provided with a ring groove
  • an apron is installed in the ring groove
  • the apron is wound around the outer circumference of the filter cover body
  • the peripheral side wall of the connecting ring at the air outlet of the mask shell is provided with a clamping groove
  • the rubber ring is in interference fit with the card groove by means of extrusion.
  • connection port is provided on the mask shell, and the connection port is connected to an air supply device through an air inlet pipe or sealed by a blocking cover, and a one-way valve is installed on the mask body.
  • the one-way valve includes an elastic membrane and a plurality of air inlet holes.
  • the elastic membrane is arranged below the air inlet hole. When air is sent into the mask shell, the elastic membrane is separated from the air inlet hole. When the user exhales outward, The elastic membrane covers and blocks the air intake holes.
  • a connecting short tube is installed at the connection port of the mask shell, one end of the blocking cover is open and detachably fixedly connected to the connecting short tube, and the other end of the blocking cover has an integrated sealing structure or is sealed by a blocking filter element.
  • the filter membrane includes an integrally formed connecting part, a convex part and a concave part, the connecting part is arranged on the outer ring of the filter membrane, the concave part is located in the center of the filter membrane, and the convex part is arranged in the connecting part and the concave part.
  • a plurality of folds are evenly arranged on the convex part, and each fold is arranged radially around the center of the filter membrane.
  • the overall shape of the filter membrane is circular, the connecting part is ring-shaped, the recessed part is circular, and the diameter of the recessed part is smaller than the inner diameter of the connecting part.
  • an annular step is connected to the periphery of the filter cover body, a plurality of support pieces for supporting the filter membrane are fixedly connected to the filter cover body, and the extension direction of the support pieces is arranged perpendicular to the filter cover body and supports The sheets are evenly spaced around the center of the filter cover body, and the filter membrane covers the upper part of the filter cover body.
  • the connecting part of the filter membrane is fixedly connected to the annular step of the filter cover body, the protrusion of the filter membrane is supported above the filter cover body through a support sheet, and the recessed part of the filter membrane is attached to the surface of the central part of the filter cover body.
  • the present invention has the following advantages:
  • the mask body is made of soft elastic material.
  • the inner tail circumference of the mask body and the user’s face have an arc structure and curl towards the inner side of the mask body. Due to the elasticity of the mask body, the inner tail of the mask body It can freely change the part that is attached to the user’s face according to the wearer’s face, preventing other parts of the mask body from being squeezed and deformed. Adjust wearing comfort for different face shapes.
  • the filter cover body is sealed and fixed by interference fit with the snap ring at the air exchange port.
  • the sealing is convenient and reliable, simple and practical.
  • the filter cover is directly removed from the air exchange port of the mask shell. Can.
  • a blowout prevention cover is arranged on the outside of the filter cover, and the blowout prevention cover and the filter cover are buckled and connected, and a second vent hole for gas exchange is reserved between the buckling part of the blowout prevention cover and the filter cover.
  • the anti-splashing effect is realized by the anti-spray cover, and it is convenient for the smooth circulation of gas.
  • the functions of the mask and the eye protection screen can be combined to protect the eyes while wearing the mask, avoid wearing multiple protective equipment at the same time, simplify the wearing process and reduce the number of medical staff wearing Workload, while saving related medical consumables.
  • the present invention When the present invention is equipped with a mask shell, it can combine the functions of masks and goggles, and can replace the use of masks, goggles, and face shields.
  • the sealed airbag can increase the relationship between the present invention and people while ensuring tightness.
  • the face-to-face contact area can better solve the current facial crush problem, while reducing the workload of medical staff while saving related medical consumables.
  • the present invention can be used in a passive state or in an active state when the mask shell is installed in the present invention.
  • the applicability is strong.
  • the air supply device can actively send suitable Fresh air
  • the air intake pipe is set in the upper middle of the mask shell, which can form an air curtain on the face to avoid atomization.
  • the air space between the mask shell and the user’s face can maintain a slight positive pressure through the air supply device.
  • the user’s breathing area is completely isolated from the external working space, which effectively protects the user’s personal safety and improves breathing comfort. Due to the existence of the one-way valve, the user’s exhaled air will only pass through the filter assembly to the outside, avoiding The unfiltered gas is exhaled.
  • the filter cover body is sealed and fixed by interference fit with the air outlet of the mask shell.
  • the sealing is convenient and reliable, simple and practical.
  • the filter cover can be directly removed from the air outlet of the mask shell and disassembled. convenient.
  • the filter membrane in this technical solution has a three-dimensional structure. Under the same projected area, the area of the filter membrane itself is greatly increased. Therefore, the three-dimensional structure is The filter membrane can effectively improve the filtration efficiency (the ratio of the amount of collected dust to the original air dust content), and at the same time, it will not affect the practicability and aesthetics of the mask after it is installed on the mask.
  • the mask filter membrane is basically a flat structure. Due to this inertial design, almost no technicians improve the flat structure of the mask filter membrane, which hinders people's research in the field of mask filter membrane technology. And development, the present invention overcomes the technical prejudice in the prior art, adopts a three-dimensional filter membrane structure, increases the area of the filter membrane itself under the same projected area, and improves the filtration efficiency, and the theory is confirmed by experimental analysis. Therefore, the present invention has outstanding substantive features and significant technological progress.
  • Figure 1 is a schematic diagram of the three-dimensional structure of the present invention.
  • Figure 2 is a schematic diagram of the structure of the present invention after installing the eye protection screen
  • Figure 3 is an exploded schematic diagram of the structure of the present invention.
  • Figure 4 is one of the structural schematic diagrams of the mask body and filter assembly of the present invention.
  • Figure 5 is the second structural diagram of the mask body and filter assembly of the present invention.
  • Figure 6 is the third structural diagram of the mask body and filter assembly of the present invention.
  • FIG. 7 is a schematic sectional view of the structure of FIG. 6;
  • Figure 8 is the fourth structural diagram of the mask body and filter assembly of the present invention.
  • FIG. 9 is a schematic sectional view of the structure of FIG. 8;
  • Fig. 10 is an enlarged schematic view of A in Fig. 8;
  • Figure 11 is a schematic diagram of the exploded structure of the present invention when a mask is added
  • Figure 12 is a schematic view of the three-dimensional structure of the present invention when a mask is added
  • Figure 13 is one of the schematic cross-sectional views of the present invention when a mask is added
  • Fig. 14 is a partial enlarged schematic diagram of the structure at A in Fig. 13;
  • Figure 15 is the second cross-sectional structural diagram of the present invention when a mask is added
  • Fig. 16 is a partial enlarged schematic diagram of the structure at B in Fig. 14;
  • Figure 17 is a schematic structural diagram of one of the one-way valves of the present invention.
  • Figure 18 is a schematic diagram of the open state of the one-way valve shown in Figure 17 (the direction indicated by the arrow in the figure is the gas flow direction);
  • Figure 19 is a schematic structural view of another one-way valve of the present invention.
  • Figure 20 is a schematic diagram of the installation of the one-way valve in Figure 19;
  • Figure 21 is a schematic view of the structure of the blocking cover of the present invention.
  • Figure 22 is a schematic diagram of the installation of the blocking cover in Figure 21;
  • Figure 23 is a schematic structural view of another plugging cover in the present invention.
  • Figure 24 is a structural comparison diagram of one of the filter membranes of the present invention before and after installation;
  • Figure 25 is a schematic structural diagram of one of the filter components of the present invention.
  • Figure 26 is a schematic cross-sectional structure diagram of one of the filter membranes installed on the filter cover of the present invention.
  • Figure 27 is a schematic diagram of the installation of one of the filter membrane installation tools in the present invention.
  • a new type of protective mask includes a mask body 1.
  • the size of the mask body 1 matches the size of a person's mouth and nose, and a ventilation space is formed between the mask body 1 and the user's mouth and nose.
  • the mask body 1 is made of soft elastic materials, such as silica gel, rubber, soft PVC, etc.
  • the side of the mask body 1 close to the user’s face is the inner side, and the inner tail 22 of the mask body 1 is arc-shaped and faces the inside of the mask body 1.
  • the sides are curled, and the inner tail circumference of the mask body 1 is attached to the user's face.
  • Both sides of the mask body 1 are provided with fixing straps 2, and the mask body 1 is provided with a ventilation opening 3, where the ventilation opening 3 is located at the head of the ventilation opening 3, and the part where the mask body 1 contacts the user’s face is the tail.
  • a filter assembly is installed at the ventilation port 3, and the filter assembly includes a filter membrane 4 and a filter cover.
  • the filter membrane 4 can be a three-layer structure or a five-layer structure.
  • the outermost and innermost filter layers are made of non-woven fabric, and the middle filter layer is made of electrostatic cotton or meltblown cloth or a combination of the two.
  • the three-layer structure can be used for Ordinary civilian masks, the five-layer structure can be used for medical masks.
  • the filter membrane 4 has a five-layer structure, it is a non-woven fabric layer, an electrostatic cotton layer, a meltblown fabric layer, an electrostatic cotton layer, and a non-woven fabric layer in order from the outside to the inside.
  • the filter cover includes a filter cover body 5, the filter cover body 5 adopts a structure formed by a plurality of ribs connected in a net shape, and a first vent 6 is formed between different ribs, and the first vent 6 covers the entire filter cover Body 5.
  • This structure not only facilitates air intake, but also ensures the strength of the overall structure.
  • the filter cover body 5 is connected to the ventilation opening 3 of the mask body 1 by interference fit, the upper surface of the filter cover body 5 is installed with a filter membrane 4, and the outside of the filter cover is also installed with a blowout prevention cover 7.
  • an eye protection screen 8 is also installed on the filter cover.
  • the lower part of the eye protection screen 8 is provided with fixed holes, and the shape of the fixed holes matches the outer circumference of the filter cover.
  • the fixed holes are semicircular, and the filter cover At least three fixed splints 9 are provided on the upper circumferential direction.
  • the filter cover can be arranged on the left, right and upper side of the filter cover, and the eye protection screen 8 is inserted between the fixed splint 9 and the blowout prevention cover 7 The formed plug gap.
  • the fixed splint 9 includes a guide part and a clamping part.
  • the insertion gap D between the guide part and the blowout preventer 7 is greater than or equal to the thickness of the eye protection screen 8.
  • the clamping part The insertion gap d between the blowout prevention cover 7 and the blowout prevention cover 7 is smaller than the thickness of the eye protection screen 8, and the clamping part and the eye protection screen 8 are in an interference fit.
  • the thickness of the eye protection screen 8 may be 0.5 mm
  • the insertion gap between the guide part and the blowout prevent cover 7 is 0.5 mm
  • the insertion gap between the clamping part and the blowout prevent cover 7 is 0.4 mm
  • the guide The part can play a guiding role when the eye protection screen 8 is inserted, and the clamping part and the eye protection screen 8 are interference fit to realize clamping and fixing, and at the same time ensure the smooth installation and fixing stability of the eye protection screen 8.
  • a positioning hole can be provided on the eye protection screen 8, and a positioning post is provided on the blowout prevention cover 7.
  • the positioning post cooperates with the positioning hole, which can lift The limit anti-dropping effect improves the stability of the eye protection screen connection.
  • a guide chamfer is provided on the side circumference of the fixing clamp 9 close to the blowout prevention cover 7. It has a certain guiding effect when the eye protection screen 8 is inserted and fixed downward.
  • a snap ring 10 is connected to the ventilation port 3, and the outer periphery of the filter cover body 5 is connected with an upper chuck 11 and a lower chuck 12, and an upper chuck 11 and a lower chuck 12 An annular groove is formed therebetween, and the free end of the snap ring 10 is interference fit in the annular groove.
  • the snap ring 10 is provided with a protrusion 13, and the lower clamping platform 12 is provided with a positioning groove 14 along the radial direction, and the protrusion 13 is fitted in the positioning groove 14.
  • the protrusion 13 and the positioning groove 14 are used in conjunction to limit the position of the filter cover body 5.
  • the inner tail of the mask body 1 is suspended, and the thickness of the inner tail of the mask body 1 gradually becomes thinner from the outside to the inside.
  • the mask body 1 is made of soft elastic material. Due to the elasticity of the mask body itself, if the user’s face is relatively large when worn, the thinner part of the inner tail of the mask body 1 will be compressed. On the one hand, thinner silicone or rubber can be used. To a certain extent, the pressure is reduced. On the other hand, the structure leaves sufficient space to prevent the mask body 1 from being squeezed and deformed to avoid affecting breathing. Insufficient space means insufficient space for adjustment; therefore, the above design does not affect the sealing performance between the mask body 1 and the user's face, and the wearing comfort can be adjusted according to the user's different face shapes.
  • both sides of the nose wing part of the mask body 1 are concave.
  • the nose part of the mask body 1 fits the nose more closely, reducing the volume of the nose of the mask body 1, which is conducive to the use of glasses wearers and avoids obstructing the line of sight;
  • the mask body 1 is provided with reinforcing ribs 15 to increase the strength of the mask body 1, avoid collapse and deformation during wearing, and enhance wearability; specifically, the reinforcing ribs 15 may be provided
  • the mask body 1 corresponds to the position of the user's cheeks and the mask body 1 corresponds to the position of the user's nose.
  • the filter cover body 5 is provided with a plurality of hooks 16, and the ends of the fixing belt 2 are connected to the hooks 16.
  • the fixing belt 2 is provided with a plurality of holes, which is convenient for the wearer to adjust the length of the fixing belt 2 according to the size of the head, and enhance the wearing comfort.
  • the top circumference of the filter cover body 5 is connected outwardly with an annular step 17, and the filter membrane 4 covers the upper surface of the filter cover body 5 and is fixedly connected above the annular step 17.
  • a plurality of clamping posts 18 are arranged on the step 17 at intervals, a second vent hole is formed between two adjacent clamping posts 18, and the top ends of the clamping posts 18 are hook-shaped.
  • the bottom circumference of the inner wall of the blowout prevention cover 7 is provided with a plurality of buckling parts for mating with the filter cover.
  • the buckling parts are buckled together with the clamping posts 18 on the filter cover body 5, and the buckling parts are provided with arc-shaped clips.
  • the rib 19, the arc-shaped rib 19 is clamped on the hook-shaped end of the clamping column 18, and the inner wall of the blowout prevention cover 7 is connected with a plurality of limiting bosses 20 for limiting the relative distance between the blowout prevention cover 7 and the filter cover.
  • the distance between the bottom surface of the limiting boss 20 and the upper surface of the arc-shaped rib 19 is slightly larger than the height of the hook-shaped end of the clamping column 18 of the filter cover, which can ensure that the arc-shaped rib 19 and the hook-shaped end of the clamping column 18 are buckled together. , And at the same time, avoid the blowout prevention cover 7 from moving greatly along the direction of the clamping column 18.
  • the outer side wall of the hook-shaped end of the clamping column 18 is provided with an upper guiding inclined surface
  • the lower side of the arc-shaped clamping rib 19 is provided with a lower guiding inclined surface
  • the upper guiding inclined surface matches the lower guiding inclined surface.
  • the distance from the top surface of the hook-shaped end of the clamp column 18 to the annular step 17 is greater than the distance from the top surface of the filter membrane 4 to the annular step 17. space.
  • the two sides of the buckling part are respectively fixedly connected with limit stoppers 21 for circumferentially limiting the clamping column 18. Avoid movement of the clamping column 18 in the circumferential direction, and ensure the connection reliability of the blowout prevention cover 7.
  • the guide part of the fixed splint 9 can play a guiding role when the eye protection screen 8 is plugged in.
  • the clamping part and the eye protection screen 8 are in interference fit to achieve clamping and fixing, while ensuring the smooth installation and fixing of the eye protection screen 8. stability. When it is necessary to disassemble and replace the eye protection screen 8, simply pull it out of the filter cover, which is easy to operate.
  • the filter assembly When installing the filter assembly, first install the filter membrane 4 in the filter cover, and then install the filter cover body 5 through the interference fit with the snap ring 10 at the ventilation port 3 to achieve sealing and fixation. Due to the elasticity of the mask body, the snap ring 10 It can be embedded in the annular groove between the upper chuck 11 and the lower chuck 12 for sealing and fixing.
  • the filter cover body 5 has a first vent hole 6, and a second vent hole is formed between two adjacent clamping posts 18 on the filter cover.
  • blowout prevention cover 7 and the filter cover are buckled and connected, and a second vent hole for gas exchange is reserved between the buckling part of the blowout prevention cover 7 and the filter cover, and the spray prevention cover 7 realizes the splash prevention It also facilitates the smooth flow of gas.
  • the third embodiment of a new type of protective mask on the basis of the first embodiment, it further includes a mask shell 23, and the mask shell is not connected with the air supply device.
  • the details are as follows.
  • the overall contour of the mask shell 23 is consistent with the human face.
  • the bottom circumference of the mask shell 23 is connected with a sealing air bag 24 for sealing the mask shell 23 to the user’s face.
  • a gas space is formed between the face of the person, the mask shell 23 is provided with a first fixing belt 25, the user wears the first fixing belt 25 to the user's head, the middle of the mask shell 23 is provided with an air outlet 25, an air outlet 25 Filter components are installed at the place;
  • the mask body 1 is detachably installed in the mask shell 23.
  • the size of the mask body 1 matches the size of the human nose and mouth.
  • the mask body 1 is made of soft elastic material, such as silicone, rubber, soft PVC, etc., with the mask body 1
  • the side close to the user's face is the inside.
  • the inner tail of the mask body 1 is curved and curled toward the inner side of the mask body 1.
  • the inner tail circumference of the mask body 1 is attached to the user's face; the mask body 1
  • a ventilation port 3 is provided on the upper part, and the ventilation port 3 is in communication with the filter assembly.
  • the air outlet 25 communicates with the ventilation opening 3 of the mask body.
  • the mask shell 23 can protect the eyes of the user, and the configuration of the mask body 1 can prevent fogging on the mask shell 23 from affecting the line of sight.
  • the mask body 1 is detachably connected to the air outlet 25 of the mask shell 23 by a ferrule.
  • the ferrule includes an outer ring sleeve 26 and an inner ring 27 that are coaxially arranged.
  • the outer ring A mounting slot is provided between the sleeve 26 and the inner ring 27, a snap ring 28 is connected to the ventilation port 3 of the mask body 1, the snap ring 28 is snapped into the installation slot, and the outer ring sleeve 26 is sleeved on the mask shell 23 25 outlets.
  • the inner ring 27 of the ferrule is provided with a first positioning groove in the radial direction
  • the snap ring 28 is provided with a first protrusion 29, and a first protrusion 29 29 is fitted in the first positioning groove
  • the outer ring sleeve 26 of the ferrule is provided with a second positioning groove 30 along the axial direction
  • the air outlet 25 of the mask shell 23 is provided with a connecting ring 31 inward
  • the outer ring sleeve 26 sets It is connected to the connecting ring 31
  • the connecting ring 31 is provided with a second protrusion 38 that cooperates with the second positioning groove 30.
  • the filter cover body 18 is connected to the connecting ring 31 at the air outlet 25 of the mask shell 23 by an interference fit.
  • the lower circumference of the filter cover body 18 is provided with a ring groove, and an apron 37 is installed in the ring groove.
  • the peripheral ring is provided with a clamping groove, and the rubber ring 37 is an interference fit with the clamping groove through an extrusion method to realize an inverted seal between the filter cover and the mask shell 23.
  • the sealing is convenient and reliable.
  • the filter cover can be directly pulled out from the air outlet 25 of the mask shell 23, which is convenient to disassemble.
  • first protrusion 29 When the first protrusion 29 is provided, two first protrusions 29, one large and one small, can be provided to prevent the mask body 1 and the card sleeve from being reversed when connecting the mask body 1 and the ferrule.
  • the second protrusion on the connecting ring 31 can play a positioning role after the ferrule is sleeved on the connecting ring 31, and at the same time prevent the ferrule from rotating.
  • the mask shell 23 of the present invention can be made of a transparent polycarbonate material.
  • blowout prevention and the filter cover are buckled and connected, and a second vent hole for gas exchange is reserved between the buckling part of the blowout prevention cover 19 and the filter cover, which realizes the effect of splash prevention through the blowout prevention cover 19 , And facilitate the smooth flow of gas.
  • the novel protective masks of the present invention are in passive form, and can be used without the external air transfer device 32.
  • the fourth embodiment of a new type of protective mask on the basis of the third embodiment, the air supply device 32 is connected.
  • connection port is opened on the mask shell 23, and the connection port can be set at the top position of the mask shell 23 to avoid affecting the field of vision.
  • the air device 32 may be sealed by a blocking cover 41, and a check valve 33 is installed on the mask body 1.
  • the new protective mask of the present invention is in an active form.
  • the air supply device 32 is equipped with a second fixing belt, and the air supply device 32 is fixed to the user's Waist or arm.
  • the external air blowing device 32 actively delivers gas into the mask shell 23.
  • the gas first enters the mask shell 23, and then enters the mask body 1 through the one-way valve 33 for the user to breathe. And due to the existence of the one-way valve 33, the air exhaled by the user will only pass through the filter assembly to the outside, avoiding the exhalation of unfiltered air.
  • the air supply device 32 includes a motor, a fan, a lithium battery and a circuit board.
  • the lithium battery supplies power to the circuit board.
  • the circuit board controls the operation of the motor.
  • the motor drives the fan to work.
  • the fan sucks in air and filters it through the primary filter.
  • the filter membrane 17 is installed. This is the current technology and will not be repeated here.
  • the air supply device 32 can be an electric air supply system sold in major shopping malls.
  • the one-way valve includes an elastic membrane 36 and a plurality of air inlet holes 35.
  • the elastic membrane 36 is arranged below the air inlet hole 35.
  • the hole 35 is separated, and when the user exhales outward, the elastic membrane 36 covers and blocks the air inlet hole 35.
  • the air inlet can be directly arranged on the mask body 1, or an upper cover 34 with an air inlet hole can be separately provided.
  • a mounting hole is provided on the mask body 1, and the upper cover 34 is fixed on the mask body.
  • the elastic membrane 36 such as a silicone membrane, is arranged below the air inlet 35.
  • the elastic membrane 36 is provided with a connecting post, and the connecting post is clamped on the mask body 1 or the upper cover 34.
  • the one-way valve 33 can also be a structure in which the upper cover 34 and the lower cover are buckled together.
  • the lower cover is arranged under the upper cover 34.
  • the elastic membrane 36 is a ring-shaped sheet structure.
  • the air inlet of the upper cover 34 is connected to the elastic membrane 36
  • the outer ring is connected, the other end of the elastic membrane 36 can be attached to or separated from the air inlet 35 according to the airflow direction, and an air duct is provided between the upper cover 34 and the lower cover.
  • connection port is sealed by a blocking cover 41, and a connection short tube 40 is installed at the connection port of the mask shell.
  • the connection short tube 40 can be integrally formed at the connection port of the mask shell, or it can be detachably fixed and connected.
  • one end of the blocking cover 41 is open and can be detachably fixedly connected to the connecting short tube 40.
  • the specific connection method can be threaded connection, plug connection, screw connection, etc., and the other end of the blocking cover 41 is Integral sealing structure or sealing by blocking filter element 42.
  • the structure of the blocking cover 41 can be an integrated structure with one end open and one end closed, or both ends can be open, and a plugging filter element 42 is installed at the open end away from the mask shell 23 for sealing.
  • the plugging filter element 42 may have the same structure as the filter membrane 17 described below.
  • a new type of active protective mask After the one-way valve is installed on the mask body, it can actively supply air to the user when the air transfer device is outside, and the blocking cover 41 can be used to connect the mask shell when the air transfer device is not outside. The mouth is isolated from the outside and does not affect the eye protection function of the mask shell.
  • the present invention can be used in various forms, has strong applicability, and is convenient for popularization and application.
  • Embodiment 5 of a new type of protective mask As shown in Figures 24-27, the filter membrane is changed from an existing planar structure to a three-dimensional structure to improve filtration efficiency.
  • the filter membrane 4 includes an integrally formed connecting portion 43, a convex portion 44, and a recessed portion 45.
  • the overall shape of the filter membrane 4 can be circular or elliptical, but is not limited to the above-mentioned shape.
  • the connecting portion 43 is provided on the filter membrane 4.
  • the concave part 45 is located in the center of the filter membrane 4, and the convex part 44 is arranged between the connecting part 43 and the concave part 45.
  • the convex part 44 is evenly provided with a plurality of folds 46, and each fold 46 surrounds the filter membrane 4 The center is arranged radially.
  • the cross-sectional shape of the protrusion 44 may be an inverted U-shape, an inverted V-shape, an inverted W-shape, or an m-shape, and the concave portion 45 is lower than the highest point of the convex portion 44.
  • the overall shape of the filter membrane 4 is circular, the connecting portion 43 is annular, the recessed portion 45 is circular, and the diameter of the recessed portion 45 is smaller than the inner diameter of the connecting portion 43.
  • the filter membrane 4 in the present technical solution is a three-dimensional structure. Under the same projected area, the area of the filter membrane 4 itself is greatly increased. Therefore, the three-dimensional structure The filter membrane 4 can effectively improve the filtration efficiency (the ratio of the amount of collected dust to the dust content of the original air), and at the same time, it will not affect the practicability and aesthetics of the mask after it is installed on the mask.
  • the filter cover body 21 adopts a structure formed by a plurality of ribs connected in a net shape.
  • the first vent holes 22 are formed between different ribs.
  • the first vent holes 22 cover the entire filter cover body 21. This structure is convenient for access. Gas can ensure the strength of the overall structure.
  • An annular step 23 is connected to the periphery of the filter cover body 21.
  • a plurality of support sheets 24 for supporting the filter membrane 4 are fixedly connected to the filter cover body 21.
  • the support sheets 24 can be fixed on the side wall of the annular step 23, It can also be fixed on the ribs of the filter cover body 21.
  • the extension direction of the support sheet 24 is perpendicular to the filter cover body 21.
  • the support sheet 24 is evenly arranged around the center of the filter cover body 21.
  • the filter membrane 4 covers the filter cover body 21. Above.
  • the connecting portion 43 of the filter membrane 4 is fixedly connected to the annular step 23 of the filter cover body 21, and can be connected by ultrasonic welding.
  • the protrusion 44 of the filter membrane 4 is supported above the filter cover body 21 through the support sheet 24.
  • the filter membrane The recessed part 45 of 4 is attached to the surface of the central part of the filter cover body 21.
  • the filter membrane installation tool When installing the filter membrane 4, it can be operated through the filter membrane installation tool.
  • the filter membrane installation tool is shown in Figure 27.
  • the filter membrane installation tool includes a pressure groove, which matches the structure enclosed by each support sheet 24.
  • the pressure groove There is also a handle on it.
  • the connecting portion 43 of the filter membrane 4 is attached to the annular step 23 of the filter cover 2, the recessed portion 45 moves downward to be attached to the surface of the central part of the filter cover body 21, and the convex portion 44 Supported by the supporting sheet 24, the wrinkles 46 on the protrusion 44 shrink.

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Abstract

一种新型防护口罩，包括口罩体（1），口罩体（1）的大小与人的口鼻部大小相匹配，口罩体（1）为软质弹性材料，口罩体（1）的内侧尾部为弧形且朝向口罩体（1）的内侧面卷曲；口罩体（1）的换气口（3）处安装有过滤组件，过滤组件包括过滤膜（4）和过滤盖；过滤盖包括过滤盖本体（5），过滤盖本体（5）采用多条筋位网状连接而成的结构；过滤盖本体（5）通过过盈配合连接在口罩体（1）的换气口（3）处，过滤盖本体（1）的上表面安装有过滤膜（4），过滤盖的外侧还安装有防喷盖（7）。该口罩可解决现有的口罩无法适应不同脸型且无法防喷溅的问题。

Description

一种新型防护口罩 技术领域
本发明涉及防护用品领域，尤其涉及一种新型防护口罩。
背景技术
根据目前已发病的新型冠状病毒肺炎统计分析，目前可以确定的新型冠状病毒感染的肺炎传播途径主要为直接传播、气溶胶传播和接触传播。在医生为病人检查、就诊时感染的风险较大，为保护一线医护人员的身体健康，需要佩戴防护用具。目前，临床医护人员常用的口罩大小规格一致，无法适应不同脸型，变形的口罩防护作用降低，还会给佩戴者带来不适感。另外，临床中仅佩戴口罩无法同时防护眼部，经常需要同时佩戴多个防护用具，佩戴过程繁琐。
同时，新型冠状病毒肺炎患者和高度疑似患者佩戴口罩时，其呛咳、咳嗽等行为可能引起污染物喷溅，单凭过滤膜或现有的过滤结构无法完全阻挡污染物，导致医护人员容易暴露在极易受感染的环境中。
发明内容
本发明的目的在于提供一种新型防护口罩，用以解决现有的口罩无法适应不同脸型且无法防喷溅的问题。
为了解决上述问题，本发明采用以下技术方案：一种新型防护口罩，包括口罩体，口罩体的大小与人的口鼻部大小相匹配，口罩体与使用者的口鼻部之间形成换气空间，口罩体为软质弹性材料，如硅胶、橡胶、软质PVC等，以口罩体靠近使用者面部的一侧为内侧，口罩体的内侧尾部为弧形且朝向口罩体的内侧面卷曲，口罩体的内侧尾部周圈与使用者的脸部相贴；口罩体的两侧设置有固定带，口罩体上设置有换气口，换气口处安装有过滤组件，过滤组件包括过滤膜和过滤盖；过滤盖包括过滤盖本体，过滤盖本体采用多条筋位网状连接而成的结构，不同筋位之间分别形成第一通气孔，所述第一通气孔布满整个过滤盖本体；过滤盖本体通过过盈配合连接在口罩体的换气口处，过滤盖本体的上表面安装有过滤膜，过滤盖的外侧还安装有防喷盖。
可选地，过滤盖上安装有护目屏。
可选地，护目屏的下部开设有固定孔位，固定孔位的形状与过滤盖的外周相 匹配，过滤盖上沿周向设置有至少三个固定夹板，护目屏插接在固定夹板与防喷盖之间形成的插接间隙内。
可选地，固定夹板包括导向部和夹紧部，导向部与防喷盖之间的插接间隙大于或等于护目屏的厚度，夹紧部与防喷盖之间的插接间隙小于护目屏的厚度，夹紧部与护目屏过盈配合。
可选地，固定夹板靠近防喷盖的一侧周圈设有导向倒角。
可选地，换气口处连接有卡环，过滤盖本体的外周连接有上卡台和下卡台，上卡台和下卡台之间形成环形卡槽，卡环的自由端过盈配合在环形卡槽内。
可选地，卡环上设有凸起，下卡台上沿径向开设有定位槽，凸起配合安装在定位槽内。
可选地，口罩体的内侧尾部悬空且口罩体的内侧尾部从外向内的厚度逐渐变薄。
可选地，口罩体的鼻翼部位两侧内凹。
可选地，口罩体上设有加强筋。
可选地，过滤盖本体的顶部周圈向外连接有环形台阶，过滤膜覆盖在过滤盖本体的上表面并固定连接在环形台阶上方，环形台阶上间隔设置有多个卡柱，相邻两个卡柱之间形成第二通气孔，卡柱的顶端呈钩状；
防喷盖的内壁底部周圈设置有多个用于与过滤盖配合的扣接部，扣接部与过滤盖本体上的卡柱配合扣接，扣接部上设有弧形卡棱，弧形卡棱卡在卡柱的钩状端，防喷盖的内壁上连接有多个用于限定防喷盖与过滤盖之间相对距离的限位凸台。
可选地，卡柱钩状端的顶面到环形台阶的距离大于过滤膜的顶面到环形台阶的距离，防喷盖为内凹型结构，防喷盖与过滤膜之间形成气体流通空间。
可选地，扣接部的两侧分别固定连接有用于对卡柱周向限位的限位挡块。
可选地，还包括面罩壳，口罩体可拆卸地安装在面罩壳内，面罩壳的整体轮廓与人的面部一致，面罩壳的底部周圈设置有用于将面罩壳密封到使用者面部的密封气囊，面罩壳与使用者面部之间形成气体空间，面罩壳的中部设置有出气口，出气口与口罩体的换气口连通。
可选地，口罩体通过卡套可拆卸连接在面罩壳的出气口处，卡套包括同轴向 设置的外环套和内环，外环套与内环之间设有安装卡槽，口罩体的换气口处连接有卡环，卡环卡接在安装卡槽内，外环套套接在面罩壳的出气口处。
可选地，卡套的内环上沿径向开设有第一定位槽，卡环上设有第一凸起，第一凸起配合安装在第一定位槽内，卡套的外环套上沿轴向开设有第二定位槽，面罩壳出气口处向内设有连接环，外环套套接在连接环上，连接环上设有与第二定位槽配合的第二凸起。
可选地，过滤盖本体过盈配合连接在面罩壳出气口处的连接环上。具体地，过滤盖本体的下部周圈开设有环槽，环槽内安装有胶圈，胶圈缠绕在过滤盖本体的外周，面罩壳出气口处的连接环侧壁周圈设有卡沟，胶圈通过挤压的方式与卡沟过盈配合。
可选地，面罩壳上开设有连接口，连接口处通过进气管连接送风装置或通过封堵盖密封，口罩体上安装有单向阀。
可选地，单向阀包括弹性膜和多个进气孔，弹性膜设置在进气孔下方，向面罩壳内送风时，弹性膜与进气孔分离，使用者向外呼气时，弹性膜覆盖并封堵进气孔。
可选地，面罩壳连接口处安装有连接短管，封堵盖的一端敞口并可拆卸固定连接在连接短管上，封堵盖的另一端为一体密封结构或通过封堵滤芯密封。
可选地，所述过滤膜包括一体成型的连接部、凸起部和凹陷部，连接部设置在过滤膜的外圈，凹陷部位于过滤膜的中心，凸起部设置在连接部和凹陷部之间，凸起部上均匀设有多条褶皱，各褶皱围绕过滤膜中心呈放射状设置。
可选地，过滤膜的整体外形为圆形，连接部为环形，凹陷部为圆形，凹陷部的直径小于连接部的内径。
可选地，所述过滤盖本体的周圈向外连接有环形台阶，过滤盖本体上固定连接有多个用于支撑过滤膜的支撑片，支撑片的延伸方向垂直于过滤盖本体设置且支撑片围绕过滤盖本体的中心均匀间隔设置，过滤膜覆盖在过滤盖本体的上方。
可选地，过滤膜的连接部固定连接在过滤盖本体的环形台阶上，过滤膜的凸起部通过支撑片支撑在过滤盖本体上方，过滤膜的凹陷部与过滤盖本体的中心部位表面贴合。
采用上述技术方案，本发明具有以下优点：
1、口罩体为软质弹性材料，口罩体的内侧尾部周圈与使用者脸部相贴的部位为弧形结构且朝向口罩体的内侧面卷曲，由于口罩体自身的弹性，口罩体内侧尾部可随佩戴者脸型自由变动与使用者脸部相贴的部位，防止口罩体的其他部位与面部挤压变形，既不影响口罩体与使用者面部之间的密封性，又能根据使用者的不同脸型调整佩戴舒适度。
2、过滤盖本体通过与换气口处卡环的过盈配合实现密封固定，密封方便可靠，简单实用，在需要更换过滤组件时，直接将过滤盖从面罩壳的换气口处取掉即可。
3、在过滤盖外侧设置有防喷盖，且防喷盖与过滤盖之间扣合连接，并在防喷盖与过滤盖的扣合部位之间留有供气体交换的第二通气孔，既通过防喷盖实现了防喷溅的作用，又便于气体的顺畅流通。
4、本发明加装护目屏的情况下，可以结合口罩和护目屏的功能，在佩戴口罩的同时能够防护眼部，避免同时佩戴多个防护用具，将佩戴过程简化，减少医护人员佩戴工作量，同时节约相关医疗耗材。
5、本发明加装面罩壳的情况下，可以结合口罩和护目屏的功能，可以替代口罩、护目镜、护面罩的使用，密封气囊可在确保密封性的情况下增大本发明与人脸面部的接触面积，能较好地解决目前的面部压伤问题，同时在减少医护人员佩戴工作量的同时，节约相关医疗耗材。
6、本发明加装面罩壳的情况下，可在无源状态下使用，也可在有源状态下使用，适用性强，有源状态下，送风装置可主动为使用者送入适宜的新鲜空气，进气管设置在面罩壳的上部中间位置，可在面部形成风幕，避免雾化现象发生，面罩壳与使用者面部之间的气体空间内通过送风装置可保持微正压状态，使用者呼吸处与外部作业空间完全隔离，有效地保护了使用者的人身安全，同时改善呼吸舒适度，并且由于单向阀的存在，使用者呼出的空气只会通过过滤组件通往外部，避免未经过滤的气体呼出。
7、过滤盖本体通过与面罩壳出气口处的过盈配合实现密封固定，密封方便可靠，简单实用，在需要更换过滤组件时，直接将过滤盖从面罩壳出气口处取掉即可，拆卸方便。
8、相比于现有技术中滤膜的平面结构，本技术方案中的滤膜为立体结构， 在相同的投影面积下，极大的增加了滤膜自身的面积，由此，立体结构的滤膜能够有效提高过滤效率(被捕集粉尘量与原空气含尘量的比值)，同时在将其安装在口罩上后不影响口罩的实用性和美观性。
目前在现有技术中，口罩滤膜基本上均为平面结构，囿于这种惯性设计，几乎没有技术人员在口罩滤膜的平面结构上进行改进，阻碍了人们对口罩滤膜技术领域的研究和开发，本发明克服了现有技术中的技术偏见，采用立体的滤膜结构，在相同的投影面积下增加滤膜自身的面积，提高过滤效率，并且经过试验分析，证实了该理论。因此本发明具有突出的实质性特点和显著的技术进步。
附图说明
图1是本发明的立体结构示意图；
图2是本发明安装护目屏后的结构示意图；
图3是本发明的结构分解示意图；
图4是本发明中口罩体及过滤组件的结构示意图之一；
图5是本发明中口罩体及过滤组件的结构示意图之二；
图6是本发明中口罩体及过滤组件的结构示意图之三；
图7是图6的剖视结构示意图；
图8是本发明中口罩体及过滤组件的结构示意图之四；
图9是图8的剖视结构示意图；
图10是图8中A处的放大示意图；
图11是本发明加装面罩壳时的分解结构示意图；
图12是本发明加装面罩壳时的立体结构示意图；
图13是本发明加装面罩壳时的剖视结构示意图之一；
图14是图13中A处的局部放大结构示意图；
图15是本发明加装面罩壳时的剖视结构示意图之二；
图16是图14中B处的局部放大结构示意图；
图17是本发明其中一种单向阀的结构示意图；
图18是图17所示单向阀打开状态的示意图(图中箭头所示方向为气体流向)；
图19是本发明另一种单向阀的结构示意图；
图20是图19中单向阀的安装示意图；
图21是本发明中封堵盖的结构示意图；
图22是图21中封堵盖的安装示意图；
图23是本发明中另一种封堵盖的结构示意图；
图24是本发明中其中一种过滤膜安装前与安装后的结构对比图；
图25是本发明中其中一种过滤组件的结构示意图；
图26是本发明中其中一种过滤膜安装在过滤盖上后的剖面结构示意图；
图27是本发明中其中一种过滤膜的安装工装的安装示意图。
附图标记：1、口罩体；2、固定带；3、换气口；4、过滤膜；5、过滤盖本体；6、第一通气孔；7、防喷盖；8、护目屏；9、固定夹板；10、卡环；11、上卡台；12、下卡台；13、凸起；14、定位槽；15、加强筋；16、挂钩；17、环形台阶；18、卡柱；19、弧形卡棱；20、限位凸台；21、限位挡块；22、内侧尾部；
23、面罩壳；24、密封气囊；25、出气口；26、外环套；27、内环；28、卡环；29、第一凸起；30、第二定位槽；31、连接环；32、送风装置；33、单向阀；34、上盖；35、进气孔；36、弹性膜；37、胶圈；38、第二凸起；40、连接短管；41、封堵盖；42、封堵滤芯；
43、连接部；44、凸起部；45、凹陷部；46、褶皱；47、支撑片。
具体实施方式
为了使本发明的技术目的、技术方案和有益效果更加清楚，下面结合附图1-27和具体实施例对本发明的技术方案做出进一步的说明。
一种新型防护口罩的实施例一：
如图1-10所示，一种新型防护口罩包括口罩体1，口罩体1的大小与人的口鼻部大小相匹配，口罩体1与使用者的口鼻部之间形成换气空间。
口罩体1为软质弹性材料，如硅胶、橡胶、软质PVC等，以口罩体1靠近使用者面部的一侧为内侧，口罩体1的内侧尾部22为弧形且朝向口罩体1的内侧面卷曲，口罩体1的内侧尾部周圈与使用者的脸部相贴。
口罩体1的两侧设置有固定带2，口罩体1上设置有换气口3，换气口3所在位置为换气口3的首部，口罩体1与使用者面部接触的部位为尾部，换气口3处安装有过滤组件，过滤组件包括过滤膜4和过滤盖。
过滤膜4可为三层结构，也可为五层结构，最外侧和最内侧的过滤层采用无纺布，中间过滤层采用静电棉或熔喷布或两者的结合，三层结构可用于普通民用口罩，五层结构可用于医用口罩。过滤膜4为五层结构时，从外向内依次为无纺布层、静电棉层、熔喷布层、静电棉层和无纺布层。
过滤盖包括过滤盖本体5，过滤盖本体5采用多条筋位网状连接而成的结构，不同筋位之间分别形成第一通气孔6，所述第一通气孔6布满整个过滤盖本体5。此结构既便于进气，又可以保证整体结构的强度。
过滤盖本体5通过过盈配合连接在口罩体1的换气口3处，过滤盖本体5的上表面安装有过滤膜4，过滤盖的外侧还安装有防喷盖7。
一种新型防护口罩的实施例二：如图1-10所示，在实施例一的基础上，过滤盖上还安装有护目屏8。
进一步的，本发明其中的一个实施例中，护目屏8的下部开设有固定孔位，固定孔位的形状与过滤盖的外周相匹配，具体地，固定孔位为半圆形，过滤盖上沿周向设置有至少三个固定夹板9，具体地，过滤盖可设置在过滤盖的左侧、右侧以及上侧，护目屏8插接在固定夹板9与防喷盖7之间形成的插接间隙内。
进一步的，本发明其中的一个实施例中，固定夹板9包括导向部和夹紧部，导向部与防喷盖7之间的插接间隙D大于或等于护目屏8的厚度，夹紧部与防喷盖7之间的插接间隙d小于护目屏8的厚度，夹紧部与护目屏8过盈配合。具体地，护目屏8的厚度可为0.5mm，导向部与防喷盖7之间的插接间隙为0.5mm，夹紧部与防喷盖7之间的插接间隙为0.4mm，导向部在护目屏8插接时可起到导向作用，夹紧部与护目屏8过盈配合，实现夹紧固定，同时保障护目屏8的顺畅安装以及固定的稳定性。
进一步的，本发明其中的一个实施例中，可在护目屏8上开设定位孔，在防喷盖7上设置一个定位柱，安装护目屏8时，定位柱与定位孔配合，可起到限位防脱效果，提高护目屏连接的稳定性。
进一步的，本发明其中的一个实施例中，固定夹板9靠近防喷盖7的一侧周圈设有导向倒角。在将护目屏8向下插接固定时具有一定导向作用。
进一步的，本发明其中的一个实施例中，换气口3处连接有卡环10，过滤盖本体5的外周连接有上卡台11和下卡台12，上卡台11和下卡台12之间形成 环形卡槽，卡环10的自由端过盈配合在环形卡槽内。
卡环10上设有凸起13，下卡台12上沿径向开设有定位槽14，凸起13配合安装在定位槽14内。凸起13和定位槽14配合使用，可对过滤盖本体5进行限位。
进一步的，本发明其中的一个实施例中，口罩体1的内侧尾部悬空且口罩体1的内侧尾部从外向内的厚度逐渐变薄。口罩体1为软质弹性材料，由于口罩体自身的弹性，佩戴时，如果使用者面部相对较大，口罩体1内侧尾部的较薄处将被压迫，一方面，较薄的硅胶或橡胶可在一定程度上减小压迫力，另一方面，该结构留有充足空间防止口罩体1与面部挤压变形，避免影响呼吸，若口罩体1的内侧尾部较厚，其与口罩体1表面之间的空间不足，可调整空间也就不足；因此，以上设计既不影响口罩体1与使用者面部之间的密封性，又能根据使用者的不同脸型调整佩戴舒适度。
进一步的，本发明其中的一个实施例中，口罩体1的鼻翼部位两侧内凹。口罩体1的鼻翼部位与鼻子更加贴合，减小口罩体1鼻子处的体积，有利于眼镜佩戴者的使用，避免阻挡视线；
进一步的，本发明其中的一个实施例中，口罩体1上设有加强筋15，可增强口罩体1的强度，避免佩戴时塌陷、变形，增强可佩带性；具体地，加强筋15可设置在口罩体1对应使用者两颊处的位置以及口罩体1对应使用者鼻梁处的位置。
过滤盖本体5上设置有多个挂钩16，固定带2的端部连接在挂钩16上。佩戴时，通过挂钩16和固定带2将口罩体1和患者进行固定。固定带2上设有多个孔位，便于佩戴者根据头型大小调节固定带2长度，增强佩带舒适度。
进一步的，本发明其中的一个实施例中，过滤盖本体5的顶部周圈向外连接有环形台阶17，过滤膜4覆盖在过滤盖本体5的上表面并固定连接在环形台阶17上方，环形台阶17上间隔设置有多个卡柱18，相邻两个卡柱18之间形成第二通气孔，卡柱18的顶端呈钩状。
防喷盖7的内壁底部周圈设置有多个用于与过滤盖配合的扣接部，扣接部与过滤盖本体5上的卡柱18配合扣接，扣接部上设有弧形卡棱19，弧形卡棱19卡在卡柱18的钩状端，防喷盖7的内壁上连接有多个用于限定防喷盖7与过滤 盖之间相对距离的限位凸台20。限位凸台20底面到弧形卡棱19上表面之间的距离略大于过滤盖的卡柱18钩状端的高度，既可保证弧形卡棱19与卡柱18的钩状端配合扣接，同时避免防喷盖7沿卡柱18方向大幅度窜动。
卡柱18钩状端的外侧壁设有上导向斜面，弧形卡棱19的下侧设有下导向斜面，上导向斜面与下导向斜面相匹配。将防喷盖7扣向过滤盖时，防喷盖7的下导向斜面先经由过滤盖的上导向斜面接触导向，再实现卡柱18钩状端与弧形卡棱19的扣合，上导向斜面与下导向斜面的结构使得防喷盖7的安装更方便可靠。
卡柱18钩状端的顶面到环形台阶17的距离大于过滤膜4的顶面到环形台阶17的距离，防喷盖7为内凹型结构，防喷盖7与过滤膜4之间形成气体流通空间。
扣接部的两侧分别固定连接有用于对卡柱18周向限位的限位挡块21。避免卡柱18沿周向移动，保障防喷盖7的连接可靠性。
安装护目屏8时，将其下部固定孔位对准过滤盖，并将其插接在固定夹板9与防喷盖7之间形成的插接间隙内。固定夹板9中的导向部在护目屏8插接时可起到导向作用，夹紧部与护目屏8过盈配合，实现夹紧固定，同时保障护目屏8的顺畅安装以及固定的稳定性。需要拆换护目屏8时，直接将其从过滤盖上拔出即可，操作方便。
安装过滤组件时，先将过滤膜4安装在过滤盖内，再将过滤盖本体5通过与换气口3处卡环10的过盈配合实现密封固定，由于口罩体自身的弹性，卡环10可嵌入上卡台11和下卡台12之间的环形卡槽内进行密封固定。
过滤盖安装好之后，将防喷盖7对准过滤盖扣合，其中，防喷盖7上的扣接部与过滤盖上的卡柱18相互配合，防喷盖7上的限位凸台20可进行限位。
过滤盖本体5上具有第一通气孔6，过滤盖上相邻两个卡柱18之间形成第二通气孔，口罩体1内部的气体呼出时，先通过第一通气孔6，再穿过过滤膜4，经过滤后到达过滤膜4与防喷盖7之间的空间，最后再通过第二通气孔排出到外部，实现内外气体交换。
防喷盖7与过滤盖之间扣合连接，且在防喷盖7与过滤盖的扣合部位之间留有供气体交换的第二通气孔，既通过防喷盖7实现了防喷溅的作用，又便于气体的顺畅流通。
一种新型防护口罩的实施例三：在实施例一的基础上，还包括面罩壳23，面罩壳不连接送风装置，具体如下所述。
如图11至图16所示，面罩壳23的整体轮廓与人的面部一致，面罩壳23的底部周圈连接有用于将面罩壳23密封到使用者面部的密封气囊24，面罩壳23与使用者面部之间形成气体空间，面罩壳23上设置有第一固定带25，使用者，通过第一固定带25佩戴到使用者头部，面罩壳23的中部设置有出气口25，出气口25处安装有过滤组件；
面罩壳23内可拆卸地安装有口罩体1，口罩体1的大小与人的口鼻部大小相匹配，口罩体1为软质弹性材料，如硅胶、橡胶、软质PVC等，以口罩体1靠近使用者面部的一侧为内侧，口罩体1的内侧尾部为弧形且朝向口罩体1的内侧面卷曲，口罩体1的内侧尾部周圈与使用者的脸部相贴；口罩体1上设置有换气口3，换气口3与过滤组件连通。出气口25与口罩体的换气口3连通。
使用者通过口罩体1和过滤组件与外界进行空气交换，面罩壳23可对使用者的眼部进行保护，同时口罩体1的设置可避免面罩壳23上起雾影响视线。
进一步的，本发明其中的一个实施例中，口罩体1通过卡套可拆卸连接在面罩壳23的出气口25处，卡套包括同轴向设置的外环套26和内环27，外环套26与内环27之间设有安装卡槽，口罩体1的换气口3处连接有卡环28，卡环28卡接在安装卡槽内，外环套26套接在面罩壳23的出气口25处。
进一步的，本发明其中的一个实施例中，在上述结构基础上，卡套的内环27上沿径向开设有第一定位槽，卡环28上设有第一凸起29，第一凸起29配合安装在第一定位槽内，卡套的外环套26上沿轴向开设有第二定位槽30，面罩壳23出气口25处向内设有连接环31，外环套26套接在连接环31上，连接环31上设有与第二定位槽30配合的第二凸起38。
进一步的，本发明其中的一个实施例中，过滤盖本体18通过过盈配合连接在面罩壳23出气口25处的连接环31上。具体地，过滤盖本体18的下部周圈开设有环槽，环槽内安装有胶圈37，胶圈37缠绕在过滤盖本体18的外周，面罩壳23出气口25处的连接环31侧壁周圈设有卡沟，胶圈37通过挤压的方式与卡沟过盈配合，实现过滤盖与面罩壳23之间的倒扣密封。密封方便可靠，在需要替换过滤组件时，直接将过滤盖从面罩壳23的出气口25处拔出即可，拆卸方便。
在设置第一凸起29时，可设置一大一小两个第一凸起29，防止在将口罩体1和卡套连接时颠倒。连接环31上的第二凸起可在卡套套设在连接环31上后，起到定位作用，同时防止能够卡套转动。
本发明中的面罩壳23可采用透明的聚碳酸酯材料，安装过滤组件时，先将过滤膜17安装在过滤盖内，再将过滤盖本体18通过与面罩壳23出气口25处的连接环31过盈配合实现密封固定。过滤盖安装好之后，将防喷盖19对准过滤盖扣合，其中，防喷盖19上的扣接部与过滤盖上的卡柱20相互配合，防喷盖19上的限位凸台22可进行限位。防喷与过滤盖之间扣合连接，且在防喷盖19与过滤盖的扣合部位之间留有供气体交换的第二通气孔，既通过防喷盖19实现了防喷溅的作用，又便于气体的顺畅流通。
上述实施例中，本发明的新型防护口罩均为无源形式，无需外接送风装置32即可使用。
一种新型防护口罩的实施例四：在实施例三的基础上，连接送风装置32。
外接送风装置32时，在实施例三的基础上，面罩壳23上开设有连接口，所述连接口可设置在面罩壳23的顶部位置，避免影响视野，连接口处通过进气管连接送风装置32或通过封堵盖41密封，口罩体1上安装有单向阀33。
连接口处通过进气管连接送风装置32时，本发明的新型防护口罩为有源形式，送风装置32上安装有第二固定带，送风装置32通过第二固定带固定于使用者的腰部或臂部。
当面罩壳23连同送风装置32一起使用时，外部送风装置32主动向面罩壳23内输送气体，气体先进入面罩壳23内，再通过单向阀33进入口罩体1内供使用者呼吸，并且由于单向阀33的存在，使用者呼出的空气只会通过过滤组件通往外部，避免未经过滤的气体呼出。
送风装置32包括电机、风扇、锂电池及电路板，锂电池为电路板供电，电路板控制电机工作，电机带动风扇工作，风扇将空气吸入并经过初级过滤装置过滤，风扇的进气口前安装过滤膜17，此为现在技术在此不再赘述，送风装置32可以采用在各大商城均有销售的电动送风***。
如图17至图20所示，单向阀包括弹性膜36和多个进气孔35，弹性膜36设置在进气孔35下方，向面罩壳23内送风时，弹性膜36与进气孔35分离，使 用者向外呼气时，弹性膜36覆盖并封堵进气孔35。
单向阀的结构中，进气孔可直接设置在口罩体1上，也可单独设置一个带有进气孔的上盖34，在口罩体1上开设安装孔，上盖34固定在口罩体1的安装孔处，进气孔35下方设置所述弹性膜36，如硅胶膜。弹性膜36上设有连接柱，连接柱卡接在口罩体1或上盖34上。
单向阀33也可为上盖34和下盖相扣合的结构，下盖设置在上盖34下方，弹性膜36为环形片状结构，上盖34的进气孔处与弹性膜36的外环连接，弹性膜36的另一端可随气流方向与进气孔35贴合或分离，上盖34与下盖之间设有风道。
不使用送风装置时，在连接口处通过封堵盖41密封，面罩壳连接口处安装有连接短管40，连接短管40既可一体成型在面罩壳连接口处，也可可拆卸固定连接在面罩壳连接口处，封堵盖41的一端敞口并可拆卸固定连接在连接短管40上，具体连接方式可为螺纹连接、插接、螺钉连接等，封堵盖41的另一端为一体密封结构或通过封堵滤芯42密封。
如图21至图23所示，封堵盖41的结构可为一端敞口一端密闭的一体结构，也可两端均敞口，远离面罩壳23的一端敞口处安装封堵滤芯42进行密封，封堵滤芯42可与下述过滤膜17的结构相同。
有源形式的新型防护口罩，在口罩体上安装了单向阀后，外接送风装置时可主动为使用者送风，不外接送风装置时可使用封堵盖41将面罩壳上的连接口与外部隔离，不影响面罩壳的护目功能。
综合上述实施例，本发明的使用形式多样，适用性强，便于推广应用。
一种新型防护口罩的实施例五：如图24-27所示，过滤膜由现有的平面结构改为立体结构，提高过滤效率。
所述过滤膜4包括一体成型的连接部43、凸起部44和凹陷部45，过滤膜4的整体外形可为圆形、椭圆形，但不限于上述形状，连接部43设置在过滤膜4的外圈，凹陷部45位于过滤膜4的中心，凸起部44设置在连接部43和凹陷部45之间，凸起部44上均匀设有多条褶皱46，各褶皱46围绕过滤膜4中心呈放射状设置。
进一步的，本发明其中的一个实施例中，凸起部44的截面形状可以为倒U 型、倒V型、倒w型或m型，凹陷部45低于凸起部44的最高处。
进一步的，本发明其中的一个实施例中，过滤膜4的整体外形为圆形，连接部43为环形，凹陷部45为圆形，凹陷部45的直径小于连接部43的内径。
相比于现有技术中过滤膜4的平面结构，本技术方案中的过滤膜4为立体结构，在相同的投影面积下，极大的增加了过滤膜4自身的面积，由此，立体结构的过滤膜4能够有效提高过滤效率(被捕集粉尘量与原空气含尘量的比值)，同时在将其安装在口罩上后不影响口罩的实用性和美观性。
过滤盖本体21采用多条筋位网状连接而成的结构，不同筋位之间分别形成第一通气孔22，所述第一通气孔22布满整个过滤盖本体21，此结构既便于进气，又可以保证整体结构的强度。过滤盖本体21的周圈向外连接有环形台阶23，过滤盖本体21上固定连接有多个用于支撑过滤膜4的支撑片24，支撑片24可固定在环形台阶23的侧壁上，也可固定在过滤盖本体21的筋条上，支撑片24的延伸方向垂直于过滤盖本体21设置且支撑片24围绕过滤盖本体21的中心均匀设置，过滤膜4覆盖在过滤盖本体21的上方。
过滤膜4的连接部43固定连接在过滤盖本体21的环形台阶23上，可通过超声波焊接的方式连接，过滤膜4的凸起部44通过支撑片24支撑在过滤盖本体21上方，过滤膜4的凹陷部45与过滤盖本体21的中心部位表面贴合。
安装过滤膜4时，可通过滤膜安装工装进行操作，过滤膜安装工装如图27所示，该过滤膜安装工装包括压槽，压槽与各支撑片24围成的结构相匹配，压槽上还设有手柄。将过滤盖2放置在超声波焊接机的工作台上，再依次将过滤膜4和过滤膜安装工装对应放置在过滤盖2上方，超声波焊接机的机头下移后通过过滤膜安装工装压在过滤盖2上，超声波焊接线沿环形台阶23一周后，过滤膜4即被固定在过滤盖2上。
在压装过滤膜4的过程中，过滤膜4的连接部43与过滤盖2的环形台阶23贴合，凹陷部45下移至与过滤盖本体21的中心部位表面贴合，凸起部44由支撑片24支撑，凸起部44上的褶皱46收缩。
上述实施例并非对本发明的形状、材料、结构等作任何形式上的限制，凡是依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均属于本发明技术方案的保护范围。

Claims (24)

  1. 一种新型防护口罩，包括口罩体，其特征在于：口罩体的大小与人的口鼻部大小相匹配，口罩体与使用者的口鼻部之间形成换气空间，
    口罩体为软质弹性材料，以口罩体靠近使用者面部的一侧为内侧，口罩体的内侧尾部为弧形且朝向口罩体的内侧面卷曲，口罩体的内侧尾部周圈与使用者的脸部相贴；
    口罩体的两侧设置有固定带，口罩体上设置有换气口，换气口处安装有过滤组件，过滤组件包括过滤膜和过滤盖；
    过滤盖包括过滤盖本体，过滤盖本体采用多条筋位网状连接而成的结构，不同筋位之间分别形成第一通气孔，所述第一通气孔布满整个过滤盖本体；
    过滤盖本体通过过盈配合连接在口罩体的换气口处，过滤盖本体的上表面安装有过滤膜，过滤盖的外侧还安装有防喷盖。
  2. 根据权利要求1所述的一种新型防护口罩，其特征在于：过滤盖上安装有护目屏。
  3. 根据权利要求2所述的一种新型防护口罩，其特征在于：护目屏的下部开设有固定孔位，固定孔位的形状与过滤盖的外周相匹配，过滤盖上沿周向设置有至少三个固定夹板，护目屏插接在固定夹板与防喷盖之间形成的插接间隙内。
  4. 根据权利要求3所述的一种新型防护口罩，其特征在于：固定夹板包括导向部和夹紧部，导向部与防喷盖之间的插接间隙大于或等于护目屏的厚度，夹紧部与防喷盖之间的插接间隙小于护目屏的厚度，夹紧部与护目屏过盈配合。
  5. 根据权利要求3所述的一种新型防护口罩，其特征在于：固定夹板靠近防喷盖的一侧周圈设有导向倒角。
  6. 根据权利要求1至5中任一项所述的一种新型防护口罩，其特征在于：换气口处连接有卡环，过滤盖本体的外周连接有上卡台和下卡台，上卡台和下卡台之间形成环形卡槽，卡环的自由端过盈配合在环形卡槽内。
  7. 根据权利要求6所述的一种新型防护口罩，其特征在于：卡环上设有凸起，下卡台上沿径向开设有定位槽，凸起配合安装在定位槽内。
  8. 根据权利要求1或2所述的一种新型防护口罩，其特征在于：口罩体的内侧尾部悬空且口罩体的内侧尾部从外向内的厚度逐渐变薄。
  9. 根据权利要求1或2所述的一种新型防护口罩，其特征在于：口罩体的鼻翼部位两侧内凹。
  10. 根据权利要求1或2所述的一种新型防护口罩，其特征在于：口罩体上设有加强筋。
  11. 根据权利要求1或2所述的一种新型防护口罩，其特征在于：过滤盖本体的顶部周圈向外连接有环形台阶，过滤膜覆盖在过滤盖本体的上表面并固定连接在环形台阶上方，环形台阶上间隔设置有多个卡柱，相邻两个卡柱之间形成第二通气孔，卡柱的顶端呈钩状；
    防喷盖的内壁底部周圈设置有多个用于与过滤盖配合的扣接部，扣接部与过滤盖本体上的卡柱配合扣接，扣接部上设有弧形卡棱，弧形卡棱卡在卡柱的钩状端，防喷盖的内壁上连接有多个用于限定防喷盖与过滤盖之间相对距离的限位凸台。
  12. 根据权利要求11所述的一种新型防护口罩，其特征在于：卡柱钩状端的顶面到环形台阶的距离大于过滤膜的顶面到环形台阶的距离，防喷盖为内凹型结构，防喷盖与过滤膜之间形成气体流通空间。
  13. 根据权利要求11所述的一种新型防护口罩，其特征在于：扣接部的两侧分别固定连接有用于对卡柱周向限位的限位挡块。
  14. 根据权利要求1所述的一种新型防护口罩，其特征在于：还包括面罩壳，口罩体可拆卸地安装在面罩壳内，面罩壳的整体轮廓与人的面部一致，面罩壳的底部周圈设置有用于将面罩壳密封到使用者面部的密封气囊，面罩壳与使用者面部之间形成气体空间，面罩壳的中部设置有出气口，出气口与口罩体的换气口连通。
  15. 根据权利要求14所述的一种新型防护口罩，其特征在于：口罩体通过卡套可拆卸连接在面罩壳的出气口处，卡套包括同轴向设置的外环套和内环，外环套与内环之间设有安装卡槽，口罩体的换气口处连接有卡环，卡环卡接在安装卡槽内，外环套套接在面罩壳的出气口处。
  16. 根据权利要求15所述的一种新型防护口罩，其特征在于：卡套的内环上沿径向开设有第一定位槽，卡环上设有第一凸起，第一凸起配合安装在第一定 位槽内，卡套的外环套上沿轴向开设有第二定位槽，面罩壳出气口处向内设有连接环，外环套套接在连接环上，连接环上设有与第二定位槽配合的第二凸起。
  17. 根据权利要求16所述的一种新型防护口罩，其特征在于：过滤盖本体过盈配合连接在面罩壳出气口处的连接环上。
  18. 根据权利要求14所述的一种新型防护口罩，其特征在于：面罩壳上开设有连接口，连接口处通过进气管连接送风装置或通过封堵盖密封，口罩体上安装有单向阀。
  19. 根据权利要求18所述的一种新型防护口罩，其特征在于：单向阀包括弹性膜和多个进气孔，弹性膜设置在进气孔下方，向面罩壳内送风时，弹性膜与进气孔分离，使用者向外呼气时，弹性膜覆盖并封堵进气孔。
  20. 根据权利要求18所述的一种新型防护口罩，其特征在于：面罩壳连接口处安装有连接短管，封堵盖的一端敞口并可拆卸固定连接在连接短管上，封堵盖的另一端为一体密封结构或通过封堵滤芯密封。
  21. 根据权利要求1至20中任一项所述的一种新型防护口罩，其特征在于：所述过滤膜包括一体成型的连接部、凸起部和凹陷部，连接部设置在过滤膜的外圈，凹陷部位于过滤膜的中心，凸起部设置在连接部和凹陷部之间，凸起部上均匀设有多条褶皱，各褶皱围绕过滤膜中心呈放射状设置。
  22. 根据权利要求21所述的一种新型防护口罩，其特征在于：过滤膜的整体外形为圆形，连接部为环形，凹陷部为圆形，凹陷部的直径小于连接部的内径。
  23. 根据权利要求21或22所述的一种新型防护口罩，其特征在于：所述过滤盖本体的周圈向外连接有环形台阶，过滤盖本体上固定连接有多个用于支撑过滤膜的支撑片，支撑片的延伸方向垂直于过滤盖本体设置且支撑片围绕过滤盖本体的中心均匀间隔设置，过滤膜覆盖在过滤盖本体的上方。
  24. 根据权利要求23所述的一种新型防护口罩，其特征在于：过滤膜的连接部固定连接在过滤盖本体的环形台阶上，过滤膜的凸起部通过支撑片支撑在过滤盖本体上方，过滤膜的凹陷部与过滤盖本体的中心部位表面贴合。
PCT/CN2020/093182 2020-03-11 2020-05-29 一种新型防护口罩 WO2021179444A1 (zh)

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CN202010388866.XA CN111450636A (zh) 2020-05-09 2020-05-09 一种高效率的滤膜结构、一种过滤组件以及一种防护口罩

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