WO2021174692A1 - 一种新型可更换过滤系统的医用防护口罩 - Google Patents

一种新型可更换过滤系统的医用防护口罩 Download PDF

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Publication number
WO2021174692A1
WO2021174692A1 PCT/CN2020/093180 CN2020093180W WO2021174692A1 WO 2021174692 A1 WO2021174692 A1 WO 2021174692A1 CN 2020093180 W CN2020093180 W CN 2020093180W WO 2021174692 A1 WO2021174692 A1 WO 2021174692A1
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WIPO (PCT)
Prior art keywords
filter system
fixedly connected
filter layer
protective mask
medical protective
Prior art date
Application number
PCT/CN2020/093180
Other languages
English (en)
French (fr)
Inventor
王增辉
李轶颖
张路
王强
李勇
邵玺
周艳聪
孙宝
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.)
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Priority claimed from CN202020244799.XU external-priority patent/CN211794451U/zh
Priority claimed from CN202020286804.3U external-priority patent/CN211983907U/zh
Priority claimed from CN202010388868.9A external-priority patent/CN111480911A/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 WO2021174692A1 publication Critical patent/WO2021174692A1/zh

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    • 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
    • A41D27/00—Details of garments or of their making
    • A41D27/24—Hems; Seams
    • 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
    • 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
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B9/00—Component parts for respiratory or breathing apparatus
    • A62B9/02—Valves

Definitions

  • the invention relates to the field of medical protective articles, in particular to a new type of medical protective mask with a replaceable filter system.
  • the main route of transmission of the new coronavirus is through respiratory droplets and contact transmission.
  • people In order to reduce the risk of infection, people must wear masks, but the sudden outbreak of the epidemic has caused a sharp increase in the amount of masks, causing a shortage of masks.
  • the nature of the medical staff’s work determines that they have to be in close contact with the patient.
  • viruses it has a higher risk of infection, especially when these bacteria and viruses are highly contagious, medical staff must wear highly airtight masks to reduce the risk of infection.
  • the purpose of the present invention is to provide a new type of medical protective mask with a replaceable filter system, which solves the problems of pressure marks and trauma caused by long-term wearing of the mask by the medical staff, the difficulty of replacing the mask, and the replacement of the mask aggravates the shortage of the mask.
  • the technical proposal adopted by the present invention is: a new type of medical protective mask with a replaceable filter system, comprising a cover shell and a fixing belt, the cover shell is a structure with two ends open, and the bottom edge of the cover shell is glued with a sealing pad, and the cover shell A filter system is connected to the top; the filter system includes a mounting seat and a filter membrane fixedly connected to the mounting seat.
  • the mounting seat is detachably and fixedly connected to the top of the cover, the upper part of the inner wall of the mounting seat is fixedly connected with a fitting part along its circumference, and the edge of the filter membrane is welded to the fitting part as a whole, and the filter system also includes splash prevention
  • the cover and the splash-proof cover are detachably fixedly connected to the top of the mounting seat.
  • the bottom of the mounting base is clamped with the top of the cover
  • the mounting base includes a funnel part and a connecting part
  • the connecting part is fixedly connected to the bottom end of the funnel
  • the inner side wall of the top of the cover is fixedly connected with two clamping posts
  • the side wall of the connecting part is provided with a rotating card slot adapted to the card post.
  • the bottom of the inner wall of the splash-proof cover is fixedly connected with spaced inverted buckles along its circumferential direction, and the ends of the inverted buckles are hook-shaped, and the hook-shaped ends of the inverted buckles are clamped on the upper part of the mounting seat.
  • a reinforcing rib is fixedly connected to the top of the inner wall of the splash-proof cover, and a rib plate is fixedly connected to the inner wall of the mounting seat.
  • the stiffeners include cylindrical stiffeners and radial strip stiffeners, the cylindrical stiffeners are located on the top of the splash guard, one end of the strip stiffeners extends to the edge of the splash guard, and the stiffener plate Distributed radially.
  • the outer periphery of the connecting portion is fixedly connected with a sealing ring, and a mounting groove for fitting the sealing ring is opened on the top end of the cover.
  • the bottom of the inner wall of the splash-proof cover is fixedly connected with spaced clamping strips along the circumferential direction thereof, and the clamping strips and the undercut are also spaced apart.
  • the side wall of the funnel portion is fixedly connected with a clip strip engaging member that cooperates with the clip strip, and the clip strip clip includes two first protrusions arranged at intervals; and the side wall of the funnel portion is fixedly connected with
  • the inverted buckle engaging member that cooperates with the inverted buckle also includes two second protrusions arranged at intervals.
  • the sealing cushion includes a nose bridge fitting part at the top and fitting to the bridge of the nose, a cheek fitting part fitting and symmetrically arranged on the cheeks, and protrusions are provided at the cheek fitting parts.
  • the sealing gasket includes a nose bridge fitting part that is fitted to the bridge of the nose. Both sides of the bottom end of the nose bridge fitting part are connected with a nose fitting part fitting the nose alar.
  • the nose fitting part is arc-shaped and sealed to the nose.
  • the inner side of the pad is convex, the bottoms of the nasal fitting parts on both sides are connected with cheek fitting parts that fit the cheeks, and the cheek fitting parts on both sides are connected with the chin fitting parts that fit the chin.
  • the sealing gasket is in the shape of a drop to prevent squeezing the glasses
  • the cheek fitting part includes an upper convex part, a concave part, and a lower convex part which are connected in sequence
  • the chin fitting part is recessed toward the direction of the cover
  • the inner wall of the sealing gasket The middle part of the gasket is recessed toward the outer wall of the gasket; the nose bridge fitting part, the nose fitting part, the cheek fitting part, and the chin fitting part are integrally formed; the connection between the inner surface and the inner wall of the gasket is inclinedly provided with an inclined surface.
  • a one-way valve is fixedly connected to the sealing gasket, and the one-way valve is in communication with the sealing gasket.
  • the filter membrane includes a first filter layer, a second filter layer, a third filter layer, a fourth filter layer, and a fifth filter layer that are sequentially attached from the outside to the inside.
  • the five filter layers are ultrasonically welded at their edges.
  • the first filter layer and the fifth filter layer are made of non-woven fabric, the second filter layer and the third filter layer are both made of melt blown cloth, and the fourth filter layer is made of electrostatic cotton; or, Both the first filter layer and the fifth filter layer are composed of non-woven fabrics, the second filter layer and the fourth filter layer are both composed of electrostatic cotton, and the third filter layer is composed of melt blown cloth.
  • the fixation strap includes a head fixation strap and a neck fixation strap, both ends of the head fixation strap and the neck fixation strap are fixedly connected to the fixation sheet, and the fixation sheet is provided with a head fixation strap or a neck fixation strap for wearing
  • the fixed holes are fixedly connected to the side walls on both sides of the cover, and the fixing belt is sleeved with adjusting caps.
  • a convex strip is fixedly connected to the top of the mounting seat, and a placement groove corresponding to the strip-shaped reinforcing rib is opened on the convex strip.
  • the present invention expands the area of the filter membrane by setting the mounting seat, reduces the ventilation resistance of the filter membrane, increases the volume of air entering the casing, and ensures the user's breathing smoothly.
  • the mounting seat in a detachable and fixed manner, it is convenient to replace the mounting seat and reduce the consumption of the mask;
  • the filter membrane of the mask is prevented from carrying bacteria during use by medical staff
  • the splashing of virus secretions reduces the risk of medical staff being infected by bacteria and viruses; while the splash-proof cover is set in a detachable way, which facilitates the timely replacement of the splash-proof cover by medical staff after it is contaminated, and reduces
  • the probability of face exposure of medical staff during the removal of masks has further reduced the consumption of masks and alleviated the shortage of protective equipment.
  • the arrangement of the sealing gasket prevents the top of the sealing gasket from covering the glasses, and also prevents the protective mask from squeezing the glasses and causing the glasses to press on the face to cause scars, which is convenient for users wearing glasses to wear; and the nose bridge and nose wing on the sealing gasket fit
  • the setting of the upper part, the cheek fitting part, and the chin fitting part make the gasket fit closely to the user’s face, increase its tightness with the face, improve airtightness, and avoid contamination by bacteria, viruses, etc. in the air Objects enter the nasal cavity or oral cavity of medical staff from the gap between the mask and the face.
  • the protective mask forms a complete protection system through the organic combination of sealing gasket, cover shell, filter system and splash-proof cover, which improves the degree of protection for users.
  • Figure 1 is a schematic diagram of the structure of the present invention
  • Figure 2 is a front view of the mounting seat of the present invention.
  • Figure 3 is a perspective view of the mounting seat of the present invention.
  • Figure 4 is a schematic view of the structure of the splash-proof cover of the present invention.
  • Figure 5 is a schematic diagram of the structure of the cover of the present invention.
  • Figure 6 is a perspective view of the gasket of the present invention.
  • Figure 7 is a front view of the gasket of the present invention.
  • Figure 8 is a right side view of Figure 7;
  • Figure 9 is a front view of Figure 7;
  • Fig. 10 is a schematic diagram of the structure of the filter membrane of the present invention.
  • a new type of medical protective mask with a replaceable filter system includes a cover 1 and a fixing strap 2.
  • the cover 1 is a structure with two ends open, preferably an inverted funnel structure, and the bottom edge of the cover 1
  • a sealing gasket 3 is glued there, and a filter system is connected to the top of the cover 1.
  • the filter system includes a mounting seat 4.
  • the mounting seat 4 is of a funnel shape.
  • the edge of the film 22 is welded to the top of the bonding part 5.
  • the top of the mounting base 4 is connected with a splash-proof cover 6.
  • the splash-proof cover 6 is detachably fixedly connected to the mounting base 4
  • the top specifically, the bottom of the inner wall of the splash-proof cover 6 is fixedly connected with the undercuts 7 arranged at intervals along the circumferential direction.
  • the ends of the undercuts 7 are hook-shaped, and the hooked ends of the undercuts 7 are clamped on the upper part of the funnel 8 .
  • a clamping table corresponding to the undercut is provided on the side wall of the mounting seat, the clamping table is flat and the clamping table is clamped at the hook-shaped end of the undercut.
  • the arrangement of the splash-proof cover 6 prevents the filter membrane 22 from being contaminated by blood, secretions, etc., thereby reducing frequent replacement of the mounting seat 4.
  • the mounting base 4 is detachably and fixedly connected to the top of the casing 1. Specifically, the mounting base 4 is clamped with the casing 1, and there are many ways of clamping. In this embodiment, as shown in Figs. 2 and 5 As shown, the mounting base 4 includes a funnel portion 8 and a connecting portion 9. The connecting portion 9 is fixedly connected to the bottom end of the funnel portion 8. The inner side wall of the top end of the casing 1 is fixedly connected with two clamping posts 10, and the side of the connecting portion 9 The wall is provided with a rotating clamping slot 11 corresponding to the clamping column 10 and the connecting portion 9 is matched with the top end of the casing 1.
  • the rotating mounting base 4 makes the clamping column 10 clamped in the rotating clamping slot 11, and the arrangement of the rotating clamping slot 11 makes the end of the clamping column 10 clamped on the side wall of the casing 1, thereby further ensuring the mounting seat 4
  • the bottom of the inner wall of the splash-proof cover 6 is fixedly connected with a clip 12 arranged at intervals along its circumferential direction.
  • the clip 12 is located between two adjacent undercuts 7, and the clip
  • the strip 12 and the inverted buckle 7 are also spaced apart, and the side wall of the funnel portion 8 is fixedly connected with a card strip clamping member that matches the card strip 12, and the card strip clamping member includes two spaced first protrusions 13 ,
  • the interval between the two first protrusions 13 is slightly greater than or equal to the width of the clip 12 so that the clip 12 is stuck between the two first protrusions 13.
  • the side wall of the funnel portion 8 is fixedly connected with an inverted clip that cooperates with the inverted button 7.
  • the inverted clip also includes two second protrusions 14 spaced apart between the two second protrusions 14 The interval is slightly greater than or equal to the width of the undercut 7, so that the undercut 7 is clamped between the two second protrusions 14.
  • the arrangement of the first protrusion 13 and the second protrusion 14 respectively limit the clamping strip 12 and the undercut The position of 7 prevents the splash-proof cover 6 from moving back and forth on the mounting base 4.
  • the top of the inner wall of the splash-proof cover 6 is fixedly connected with a reinforcing rib for limiting the distance between the splash-proof cover 6 and the mounting seat 4.
  • the reinforcing rib includes a cylindrical shape.
  • the columnar stiffener 15 and the radial strip stiffener 16 one end of the strip stiffener 16 is fixedly connected to the outer wall of the cylindrical stiffener 15, and the other end of the strip stiffener 16 extends to the splash guard 6 At the edge.
  • the height of the lowest part of the splash-proof cover 6 is slightly higher than the level of the end of the hook-shaped end of the undercut 7.
  • the filter membrane 22 When the splash-proof cover 6 is installed on the mounting seat 4 through the undercut 7, the filter membrane 22 The top part of the frame is in conflict with the bottom part of the reinforcing rib, and the side wall of the mounting seat 4 is clamped with the undercut 7 to prevent the splash-proof cover 6 and the mounting seat 4 from greatly shifting.
  • the ribs are arranged so that there is a certain distance between the top of the filter membrane 22 and the inner wall of the splash-proof cover 6, thereby ensuring that air enters from the gap between the clip 12 and the undercut 7 and reaches through the filter membrane 22.
  • the undercut 7 is opened to remove the splash cover 6 and install a new splash cover 6, thereby reducing The user's risk of infection.
  • the top of the mounting base 4 is fixedly connected with a protruding bar 17, and the protruding bar 17 is provided with a placement groove 18 corresponding to the bar-shaped reinforcing rib 16.
  • the end of the reinforcing rib is located in the placement groove 18. Due to the arrangement of the protruding strip 17, the gap between the splash guard 6 and the mounting base 4 is increased, thereby increasing the circulation channel for air to enter the mounting base 4. Improve the smoothness of the user's breathing.
  • ribs 19 are fixedly connected to the inner wall of the mounting base 4, and the ribs 19 are distributed in a radial shape.
  • the ribs 19 play a role in strengthening the structure of the mounting base 4;
  • the ribs 19 due to the larger area of the filter membrane 22, it will collapse downwards, and the ribs 19 also play a role in supporting the filter membrane 22.
  • the outer periphery of the connecting portion 9 is fixedly connected with a sealing ring 20, the sealing ring 20 is located above the rotating slot 11, and the top of the casing 1 is provided with a mounting for fitting the sealing ring 20 Groove (not shown in the figure), the sealing ring 20 is in interference fit with the installation groove by means of extrusion to achieve the seal between the installation seat 4 and the casing 1.
  • the gasket 3 includes a nose bridge fitting part 301 at the top of the gasket 3 and fitting to the bridge of the nose, a cheek fitting part 303 fitted symmetrically to the cheeks, and a cheek fitting part All have protrusions.
  • the gasket 3 includes a nose bridge fitting portion 301 at the top of the gasket 3 and fitting to the bridge of the nose. Both sides of the bottom end of the nose bridge fitting portion 301 are connected with the nose wings. As shown in FIG. 7, the nose fitting part 302 that fits together is arc-shaped and protrudes toward the inner side of the sealing cushion 3. This arrangement makes the sealing cushion 3 closely fit the bridge of the nose and the nose wings. The airtightness of the sealing cushion 3 and the nose bridge and wing of the user is ensured, and fogging of the glasses is avoided. As shown in FIG. 6 and FIG.
  • the bottoms of both sides of the nose fitting portions 302 are connected with cheek fitting portions 303 that fit the cheeks, and the cheek fitting portions 303 on both sides are symmetrically arranged.
  • the cheek fitting portion 303 includes an upper protruding portion 305, a recess 306, and a lower protruding portion 307 that are connected in sequence.
  • the cheek fitting portions 303 on both sides are connected with a chin fitting portion 304 that fits the chin, such as As shown in FIG. 9, the chin fitting portion 304 is recessed in a direction approaching the cover 1.
  • the side of the gasket 3 close to the face is an inner surface, and an inclined surface 308 is obliquely provided at the connection between the inner surface of the gasket 3 and the inner wall.
  • any part of the gasket 3 in contact with the face is closely attached, increasing the size of the gasket 3 and The tightness of the user's face improves sealing and comfort.
  • the middle of the inner wall of the gasket 3 is recessed toward the outer wall of the gasket 3, so that the distance between the two sides at the middle of the inner wall of the gasket 3 is increased, so as to prevent the gasket 3 from covering the mouth, which is convenient for the user. Talk and communicate normally.
  • the nose bridge fitting part 301, the nose fitting part 302, the cheek fitting part 303, and the chin fitting part 304 are integrally formed.
  • the sealing gasket 3 is in the shape of a droplet, and the drop-like arrangement prevents the top of the gasket from covering or squeezing the glasses of the wearer, which facilitates the use of the glasses wearer.
  • the material of the gasket can be TPE or silica gel. The gasket of this material avoids inflating the gasket 3, has strong biocompatibility, improves the wearing comfort of the user, and has a strong sealing performance.
  • a one-way valve 21 is fixedly connected to the sealing gasket 3 (the one-way valve 21 is a prior art and will not be repeated here), and the one-way valve 21 is in communication with the sealing gasket 3.
  • the position of the valve on the gasket 3 is not uniquely limited; the one-way valve 21 is used to inflate the gasket 3 so that the gasket 3 fits well with the face, which ensures the airtightness of the mask and improves the gasket 3 at the same time.
  • the comfort level will not cause pressure marks on the user’s face.
  • the material of the gasket 3 is PVC, and the gasket 3 of this material improves comfort.
  • the filter membrane 22 includes a first filter layer 2201, a second filter layer 2202, a third filter layer 2203, a fourth filter layer 2204, and a fifth filter layer 2205 that are sequentially attached from the outside to the inside.
  • the layer is made by pressing on its edges using ultrasonic welding technology; the first filter layer 2201 and the fifth filter layer 2205 are both made of non-woven fabric, and the second filter layer 2202 and the third filter layer 2203 are both made of melt blown cloth Structure, the fourth filter layer 2204 is composed of electrostatic cotton; alternatively, the first filter layer 2201 and the fifth filter layer 2205 are both composed of non-woven fabric, the second filter layer 2202 and the fourth filter layer 2204 are both composed of electrostatic cotton,
  • the three filter layer 2203 is composed of melt blown cloth.
  • the five filter layers cooperate and support each other, and pass through primary filtration and deep filtration, thereby improving the filtering effect.
  • the five-layer filter layer is made by pressing and bonding at its edges using ultrasonic welding technology, which ensures the airtightness of the filter membrane 22, prevents the air entering the filter membrane 22 from leaking from the side wall, and also prevents air from leaking from the filter membrane. The entry into the filter membrane 22 at the side wall of 22 affects the filtering effect.
  • the fixing strap 2 includes a head fixing strap and a neck fixing strap. Both ends of the head fixing strap and the neck fixing strap are fixedly connected to the fixing piece 201.
  • the fixing piece 201 is provided with a head
  • the tightness of the fixing strap 2 can be adjusted by adjusting the position of the adjustment cap 202, so that the mask fits the face more closely and adapts to various The needs of the crowd.

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

Abstract

本发明公开了一种新型可更换过滤系统的医用防护口罩，包括罩壳和固定带，罩壳为两端开口的倒漏斗型结构，罩壳底端的边缘处粘接有环形的密封垫，罩壳顶端的开口处可拆卸地连接有过滤系统；过滤系统包括漏斗型的安装座和固定连接在安装座上的过滤膜。通过扩大过滤膜的面积，降低了过滤膜的通气阻力，增加了进入过滤膜中空气的体积；通过将过滤系统设置为可拆卸的形式，方便了对过滤系统的更换，减少了口罩的消耗，通过设置防喷溅盖，避免了医务人员在使用过程中口罩的过滤膜遭受到携带细菌病毒的分泌物的喷溅，也就降低了医务人员受到细菌、病毒感染的风险。

Description

一种新型可更换过滤系统的医用防护口罩 技术领域
本发明涉及医用防护用品领域，尤其涉及一种新型可更换过滤系统的医用防护口罩。
背景技术
根据研究，新型冠状病毒以经呼吸道飞沫传播、接触传播为主要的传播途径。为了降低感染的风险，人们必须佩戴口罩，但突然暴发的疫情使得口罩用量急剧增大，造成了口罩的紧缺。医务人员的工作性质就决定了其要与患者近距离地接触，而患者的血液、体液、分泌物、空气中的颗粒物中存在大量的细菌和病毒，这就使得医务人员的身体暴露在了细菌和病毒中，使其具有较高的感染风险，尤其是当这些细菌和病毒具有较强传染性时医务人员必须通过佩戴密闭性高的口罩来降低感染的风险。在医用物资紧缺的情况下，医务人员长时间佩戴密闭性高的口罩，如N95口罩时其皮肤长时间处于压迫状态，使得医务人员的面部、鼻梁等部位出现了压痕，甚至出现脱皮、红斑、破溃、过敏、感染等创伤，而这些创伤也进一步增加了医务人员被感染的风险。当口罩被病人的分泌物、血液等污染时必须及时更换口罩，但穿着防护服的医务人员更换口罩的过程繁杂，同时更换口罩时面部的暴露也增加了其感染的风险。
发明内容
本发明的目的在于提供一种新型可更换过滤系统的医用防护口罩，解决上述医务人员长期佩戴口罩产生压痕、创伤、更换口罩困难以及更换口罩加剧口罩紧缺的问题。
本发明采取的技术方案为：一种新型可更换过滤系统的医用防护口罩，包括罩壳和固定带，罩壳为两端开口的结构，罩壳底端的边缘处粘接有密封垫，罩壳顶端连接有过滤系统；过滤系统包括安装座和固定连接在安装座上的过滤膜。
优选地，安装座可拆卸固定连接在罩壳顶端，安装座内壁的上部沿其周向固定连接有贴合部，过滤膜的边缘处与贴合部焊接为一体，过滤系统还包括防喷溅盖，防喷溅盖可拆卸固定连接在安装座的顶端。
优选地，安装座的底部与罩壳顶端相卡接，安装座包括漏斗部和连接部，连 接部固定连接在漏斗部的底端，罩壳顶端的内侧壁处固定连接有两个卡柱，连接部的侧壁上开设有与卡柱相适配的旋转卡槽。
优选地，防喷溅盖内壁底部沿其周向固定连接有间隔设置的倒扣，倒扣的端部呈钩状，倒扣的钩状端卡在安装座的上部。
优选地，防喷溅盖的内壁顶部固定连接有加强筋，安装座的内壁上固定连接有筋板。
优选地，加强筋包括柱形加强筋和呈辐射状的条形加强筋，柱形加强筋位于防喷溅盖的顶部，条形加强筋的一端延伸至防喷溅盖的边缘处，筋板呈辐射状分布。
优选地，连接部的外周部固定连接有密封圈，罩壳顶端开设有用于贴合密封圈的安装槽。
优选地，防喷溅盖内壁底部沿其周向固定连接有间隔设置的卡条，卡条与倒扣之间也间隔设置。
优选地，漏斗部的侧壁上固定连接有与卡条相配合的卡条卡接件，卡条卡接件包括两个间隔设置的第一凸块；漏斗部的侧壁上固定连接有与倒扣相配合的倒扣卡接件，倒扣卡接件也包括两个间隔设置的第二凸块。
优选地，密封垫包括位于顶部的且与鼻梁相贴合的鼻梁贴合部、与脸颊相贴合的且对称设置的脸颊贴合部，脸颊贴合部处均设有凸起。
优选地，密封垫包括与鼻梁相贴合的鼻梁贴合部、鼻梁贴合部底端的两侧均连接有与鼻翼相贴合的鼻翼贴合部，鼻翼贴合部为弧形的且向密封垫内侧凸起，两侧鼻翼贴合部的底部均连接有与脸颊相贴合的脸颊贴合部，两侧的脸颊贴合部之间连接有与下巴相贴合的下巴贴合部。
优选地，密封垫为防止挤压眼镜的水滴状，脸颊贴合部包括依次连接的上凸起部、凹陷部、下凸起部，下巴贴合部向靠近罩壳的方向凹陷，密封垫内壁的中部向密封垫外壁凹陷；鼻梁贴合部、鼻翼贴合部、脸颊贴合部、下巴贴合部一体成型；密封垫的内表面与内壁之间的连接处倾斜设置有倾斜面。
优选地，密封垫上固定连接有单向阀，单向阀与密封垫相连通。
优选地，过滤膜包括从外向内依次贴合的第一过滤层、第二过滤层、第三过滤层、第四过滤层、第五过滤层，五层过滤层通过在其边缘处采用超声焊接技术压合制备而成；第一过滤层和第五过滤层均由无纺布构成，第二过滤层和第三过滤层均由熔喷布构成，第四过滤层由静电棉构成；或者，第一过滤层和第五过滤层均由无纺布构成，第二过滤层和第四过滤层均由静电棉构成，第三过滤层由熔喷布构成。
优选地，固定带包括头部固定带和颈部固定带，头部固定带和颈部固定带的两端均固定连接在固定片上，固定片上开设有用于头部固定带或颈部固定带穿过的固定孔，固定片固定连接在罩壳两侧的侧壁上，固定带上套设有调节帽。
优选地，安装座顶部固定连接有凸条，凸条上开设有与条形加强筋相对应的放置槽。
采用上述技术方案，本发明具有以下优点：本发明通过设置安装座扩大了过滤膜的面积，降低了过滤膜的通气阻力，增加了进入罩壳中空气的体积，保证了使用者呼吸的顺畅。通过将安装座设置为可拆卸固定的方式，方便了对安装座的更换，减少了口罩的消耗量；通过设置防喷溅盖，避免了医务人员在使用过程中口罩的过滤膜遭受到携带细菌病毒的分泌物的喷溅，降低了医务人员受到细菌、病毒感染的风险；而防喷溅盖设置为可拆卸的方式，方便了医务人员在防喷溅盖遭到污染后及时更换，减少了医务人员摘除口罩过程中面部暴露的几率，同时进一步减少了口罩的消耗量，缓解了防护用品紧缺的状态。密封垫的设置，避免了密封垫顶端遮盖眼镜，也避免了防护口罩挤压眼镜使得眼镜压迫脸部造成伤痕，方便了佩戴眼镜的使用者佩戴；而密封垫上的鼻梁贴合部、鼻翼贴合部、脸颊贴合部、下巴贴合部的设置使得密封垫与使用者的面部紧密贴合，增大了其与面部的密合度，提高了密闭性，避免了空气中的细菌、病毒等污染物从口罩与脸部之间的缝隙进入医务人员的鼻腔或口腔中，同时密封垫的舒适性高，避免了长时间佩戴口罩时密封垫对脸部造成压伤的情况。该防护口罩通过密封垫、罩壳、过滤系统和防喷溅盖的有机结合形成了一个完整的保护体系，提高了对使用者的防护程度。
附图说明
图1是本发明的结构示意图；
图2是本发明的安装座的主视图；
图3是本发明的安装座的立体图；
图4是本发明的防喷溅盖的结构示意图；
图5是本发明的罩壳的结构示意图；
图6是本发明的密封垫的立体图；
图7是本发明的密封垫的主视图；
图8是图7的右视图；
图9是图7的前视图；
图10是本发明的过滤膜的结构示意图。
具体实施方式
一种新型可更换过滤系统的医用防护口罩，如图1所示，包括罩壳1和固定带2，罩壳1为两端开口的结构，优选为倒漏斗型结构，罩壳1底端的边缘处粘接有密封垫3，罩壳1顶端连接有过滤系统。如图2和图3所示，过滤系统包括安装座4，优选地，安装座4为漏斗型的，安装座4内壁的上部沿其周向固定连接有圆环形的贴合部5，过滤膜22的边缘处焊接在贴合部5顶部。如图1和图4所示，安装座4的顶端连接有防喷溅盖6，进一步地，为了便于对防喷溅盖6进行更换，防喷溅盖6可拆卸固定连接在安装座4的顶端，具体地，防喷溅盖6内壁底部沿其周向固定连接有间隔设置的倒扣7，倒扣7的端部呈钩状，倒扣7的钩状端卡在漏斗部8的上部。进一步地，安装座的侧壁上设置有与倒扣相对应的卡台，卡台为平面的且卡台卡在倒扣的钩状端。防喷溅盖6的设置避免了过滤膜22被血液、分泌物等污染，进而减少了安装座4的频繁更换。
进一步地，安装座4可拆卸固定连接在罩壳1顶端，具体的，安装座4与罩壳1相卡接，卡接的方式有多种，在本实施例中，如图2和图5所示，安装座4包括漏斗部8和连接部9，连接部9固定连接在漏斗部8的底端，罩壳1顶端的内侧壁处固定连接有两个卡柱10，连接部9的侧壁上开设有与卡柱10相对应的 旋转卡槽11且连接部9与罩壳1顶端相配合。安装时，旋转安装座4使得卡柱10卡在旋转卡槽11内，而旋转卡槽11的设置使得卡柱10的端部卡紧在罩壳1的侧壁上，从而进一步保证了安装座4与罩壳1连接的稳固性；当需要更换过滤膜22时，反方向旋转安装座4使得卡柱10脱离旋转卡槽11，从而实现安装座4与罩壳1的分离。
进一步地，如图3和图4所示，防喷溅盖6内壁底部沿其周向固定连接有间隔设置的卡条12，卡条12位于相邻的两个倒扣7之间，且卡条12与倒扣7之间也间隔设置，漏斗部8的侧壁上固定连接有与卡条12相配合的卡条卡接件，卡条卡接件包括两个间隔设置第一凸块13，两个第一凸块13之间的间隔稍大于或等于卡条12的宽度，使得卡条12卡在两个第一凸块13之间。漏斗部8的侧壁上固定连接有与倒扣7相配合的倒扣卡接件，倒扣卡接件也包括两个间隔设置的第二凸块14，两个第二凸块14之间的间隔稍大于或等于倒扣7的宽度，使得倒扣7卡在两个第二凸块14之间，第一凸块13、第二凸块14的设置分别限制了卡条12、倒扣7的位置，从而避免了防喷溅盖6在安装座4上来回移动。
如图4所示，防喷溅盖6的内壁顶部固定连接有用于限定防喷溅盖6与安装座4之间距离的加强筋，为了提高加强筋的效果，进一步地，加强筋包括圆柱形的柱形加强筋15和呈辐射状的条形加强筋16，条形加强筋16的一端与柱形加强筋15的外壁固定连接，条形加强筋16的另一端延伸至防喷溅盖6的边缘处。防喷溅盖6加强筋最低部所在水平面的高度略高于倒扣7钩状端的端部所在水平面的高度，当防喷溅盖6通过倒扣7安装在安装座4上时，过滤膜22的顶部与加强筋的底部相抵触，安装座4的侧壁与倒扣7相卡接，以防止防喷溅盖6与安装座4之间发生大幅度窜动。此外，加强筋的设置使得过滤膜22的顶部与防喷溅盖6的内壁之间有一定间距，从而保证了空气从卡条12和倒扣7之间的间隔处进入并经过滤膜22到达罩壳1中，当防喷溅盖6被污染需要对防喷溅盖6进行更换时，打开倒扣7从而将防喷溅盖6移除并安装新的防喷溅盖6，从而降低了使用者被感染的风险。
进一步地，如图3所示，安装座4的顶部固定连接有凸条17，凸条17上开 设有与条形加强筋16相对应的放置槽18。使用时，加强筋的端部位于放置槽18内，由于凸条17的设置使得防喷溅盖6与安装座4之间的间隔加大，从而增大了空气进入安装座4的流通通道，提高了使用者呼吸的顺畅度。
进一步地，如图3所示，安装座4的内壁上固定连接有筋板19，筋板19呈辐射状分布，一方面，筋板19对安装座4的结构起到了加固的作用；另一方面，由于过滤膜22的面积较大会出现向下塌陷，而筋板19也起到了对过滤膜22支撑的作用。
进一步地，如图2和图1所示，连接部9的外周部固定连接有密封圈20，密封圈20位于旋转卡槽11的上方，罩壳1顶端开设有用于贴合密封圈20的安装槽(图中未示出)，密封圈20通过挤压的方式与安装槽过盈配合，实现安装座4与罩壳1之间的密封。
如图6所示，密封垫3包括位于密封垫3顶部的且与鼻梁相贴合的鼻梁贴合部301、与脸颊相贴合的且对称设置的脸颊贴合部303，脸颊贴合部处均设有凸起。
在另一个实施例中，如图6所示，密封垫3包括位于密封垫3顶部的且与鼻梁相贴合的鼻梁贴合部301、鼻梁贴合部301底端的两侧均连接有与鼻翼相贴合的鼻翼贴合部302，如图7所示，鼻翼贴合部302为弧形的且向密封垫3内侧凸起，这样的设置使得密封垫3与与鼻梁、鼻翼紧密贴合，保障了密封垫3与使用者鼻梁、鼻翼处的密闭性，避免了眼镜起雾。如图6和图8所示，两侧鼻翼贴合部302的底部均连接有与脸颊相贴合的脸颊贴合部303，两侧的脸颊贴合部303对称设置。脸颊贴合部303包括依次连接的上凸起部305、凹陷部306、下凸起部307，两侧的脸颊贴合部303之间连接有与下巴相贴合的下巴贴合部304，如图9所示，下巴贴合部304向靠近罩壳1的方向凹陷。如图6所示，密封垫3靠近脸部的一面为内表面，密封垫3的内表面与内壁连接处倾斜设置有倾斜面308。通过在密封垫3表面上设置凹陷部306、下凸起部307、下巴贴合部304、倾斜面308使得密封垫3与脸部接触的任何部位均紧密贴合，增大了密封垫3与使用者脸部的密合度，提高了密封性和舒适性。为了扩大口罩内部的空间，密 封垫3内壁的中部向密封垫3外壁凹陷，从而使得密封垫3内壁中部处两侧之间的间距增大，以避免了密封垫3遮盖嘴巴，便于使用者进行正常的说话交流。鼻梁贴合部301、鼻翼贴合部302、脸颊贴合部303、下巴贴合部304一体成型。
进一步地，密封垫3为水滴状，水滴状的设置避免了密封垫顶部遮盖或挤压佩戴者的眼镜，方便了佩戴眼镜人的使用。密封垫的材质可选用TPE或硅胶，这种材质的密封垫避免了对密封垫3进行充气，生物相容性强，提高了使用者的佩戴舒适度，并且密封性强。
在另一个实施例中，密封垫3上固定连接有单向阀21(单向阀21为现有技术，此处不再赘述)，单向阀21与密封垫3相连通，此处单向阀在密封垫3上的位置不作唯一性限定；通过单向阀21向密封垫3内充气使得密封垫3与脸部的贴合性好，保证了口罩的密闭性，同时提高了密封垫3的舒适度，不会对使用者的面部产生压痕。优选地，密封垫3的材质为PVC，该材质的密封垫3提高了舒适性。
如图10所示，过滤膜22包括从外向内依次贴合的第一过滤层2201、第二过滤层2202、第三过滤层2203、第四过滤层2204、第五过滤层2205，五层过滤层通过在其边缘处采用超声焊接技术压合制备而成；第一过滤层2201和第五过滤层2205均由无纺布构成，第二过滤层2202和第三过滤层2203均由熔喷布构成，第四过滤层2204由静电棉构成；或者，第一过滤层2201和第五过滤层2205均由无纺布构成，第二过滤层2202和第四过滤层2204均由静电棉构成，第三过滤层2203由熔喷布构成。这五层过滤层之间相互配合、相互支撑，经过初级过滤、深度过滤，从而提高了过滤的效果。五层过滤层通过在其边缘处采用超声焊接技术压合制备而成，保证了过滤膜22的密闭性，避免了进入过滤膜22中的空气从侧壁处泄露，也避免了空气从过滤膜22侧壁处进入过滤膜22中影响过滤效果。
如图5所示，固定带2包括头部固定带和颈部固定带，头部固定带和颈部固定带的两端均固定连接在固定片201上，固定片201上开设有用于头部固定带或颈部固定带穿过的固定孔203，固定片201固定连接在罩壳1两侧的侧壁上，固 定带2上还套设有调节帽202。将固定带2的两端分别穿过固定孔203并通过焊接、缝合等方式固定，通过调整调节帽202的位置可以调整固定带2的松紧度，以使得口罩与面部更加贴合，适应各种人群的需求。
使用时，将安装座4安装在罩壳1上，并根据需要将防喷溅盖6安装在安装座4上，采用注射器等向密封垫3充气，通过固定带2将口罩固定在使用者的头部，通过调整调节帽202的位置使得口罩的密封垫3贴合在使用者的面部，使用者对密封垫3进行微调以使得密封垫3与使用者的面部紧密贴合；使用过程中，可对防喷溅盖6或安装座4进行更换。
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 (16)

  1. 一种新型可更换过滤系统的医用防护口罩，包括罩壳和固定带，其特征在于：罩壳为两端开口的倒漏斗型结构，罩壳底端的边缘处粘接有密封垫，罩壳顶端的开口处可拆卸固定连接有过滤系统；过滤系统包括漏斗型的安装座和固定连接在安装座上的过滤膜。
  2. 根据权利要求1所述的新型可更换过滤系统的医用防护口罩，其特征在于：安装座的底部与罩壳顶端相卡接，安装座内壁的上部沿其周向固定连接有圆环形的贴合部，过滤膜的边缘处与贴合部焊接为一体，过滤系统还包括防喷溅盖，防喷溅盖可拆卸固定连接在安装座的顶端。
  3. 根据权利要求2所述的新型可更换过滤系统的医用防护口罩，其特征在于：安装座包括漏斗部和连接部，连接部固定连接在漏斗部的底端，罩壳顶端的内侧壁处固定连接有两个卡柱，连接部的侧壁上开设有与卡柱相适配的旋转卡槽。
  4. 根据权利要求2所述的新型可更换过滤系统的医用防护口罩，其特征在于：防喷溅盖内壁底部沿其周向固定连接有间隔设置的倒扣，倒扣的端部呈钩状，倒扣的钩状端卡在安装座上部所设置的平面状的卡台上。
  5. 根据权利要求2所述的新型可更换过滤系统的医用防护口罩，其特征在于：防喷溅盖的内壁顶部固定连接有加强筋，安装座的内壁上固定连接有筋板。
  6. 根据权利要求5所述的新型可更换过滤系统的医用防护口罩，其特征在于：加强筋包括圆柱形的柱形加强筋和呈辐射状的条形加强筋，柱形加强筋位于防喷溅盖的顶部，筋板呈辐射状分布。
  7. 根据权利要求3所述的新型可更换过滤系统的医用防护口罩，其特征在于：连接部的外周部固定连接有密封圈，罩壳顶端开设有用于贴合密封圈的安装槽。
  8. 根据权利要求3所述的新型可更换过滤系统的医用防护口罩，其特征在于：防喷溅盖内壁底部沿其周向固定连接有间隔设置的卡条，卡条与倒扣之间也间隔设置。
  9. 根据权利要求8所述的新型可更换过滤系统的医用防护口罩，其特征在 于：漏斗部的侧壁上固定连接有与卡条相配合的卡条卡接件，卡条卡接件包括两个间隔设置的第一凸块；漏斗部的侧壁上固定连接有与倒扣相配合的倒扣卡接件，倒扣卡接件也包括两个间隔设置的第二凸块。
  10. 根据权利要求1所述的新型可更换过滤系统的医用防护口罩，其特征在于：密封垫包括位于顶部的且与鼻梁相贴合的鼻梁贴合部、与脸颊相贴合的且对称设置的脸颊贴合部，脸颊贴合部处均设有凸起。
  11. 根据权利要求1所述的新型可更换过滤系统的医用防护口罩，其特征在于：密封垫包括与鼻梁相贴合的鼻梁贴合部、鼻梁贴合部底端的两侧均连接有与鼻翼相贴合的鼻翼贴合部，鼻翼贴合部为弧形的且向密封垫内侧凸起，两侧鼻翼贴合部的底部均连接有与脸颊相贴合的脸颊贴合部，两侧的脸颊贴合部之间连接有与下巴相贴合的下巴贴合部。
  12. 根据权利要求11所述的新型可更换过滤系统的医用防护口罩，其特征在于：密封垫为防止挤压眼镜的水滴状，脸颊贴合部包括依次连接的上凸起部、凹陷部、下凸起部，下巴贴合部向靠近罩壳的方向凹陷，密封垫内壁的中部向密封垫外壁凹陷；密封垫的内表面与内壁之间的连接处倾斜设置有倾斜面。
  13. 根据权利要求10、11或12任一所述的新型可更换过滤系统的医用防护口罩，其特征在于：密封垫上固定连接有单向阀，单向阀与密封垫相连通。
  14. 根据权利要求1所述的一种新型可更换过滤系统的医用防护口罩，其特征在于：过滤膜包括从外向内依次贴合的第一过滤层、第二过滤层、第三过滤层、第四过滤层、第五过滤层，五层过滤层通过在其边缘处采用超声焊接技术压合制备而成；第一过滤层和第五过滤层均由无纺布构成，第二过滤层和第三过滤层均由熔喷布构成，第四过滤层由静电棉构成；或者，第一过滤层和第五过滤层均由无纺布构成，第二过滤层和第四过滤层均由静电棉构成，第三过滤层由熔喷布构成。
  15. 根据权利要求1所述的一种新型可更换过滤系统的医用防护口罩，其特征在于：固定带包括头部固定带和颈部固定带，头部固定带和颈部固定带的两端均固定连接在固定片上，固定片上开设有用于头部固定带或颈部固定带穿过的固 定孔，固定片固定连接在罩壳两侧的侧壁上，固定带上套设有调节帽。
  16. 根据权利要求6所述的新型可更换过滤系统的医用防护口罩，其特征在于：条形加强筋的一端延伸至防喷溅盖的边缘处，安装座顶部固定连接有凸条，凸条上开设有与条形加强筋相对应的放置槽。
PCT/CN2020/093180 2020-03-03 2020-05-29 一种新型可更换过滤系统的医用防护口罩 WO2021174692A1 (zh)

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CN202020286804.3U CN211983907U (zh) 2020-03-10 2020-03-10 一种防压眼镜、增加过滤面积及减小呼吸阻力的防护口罩
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