CN113243588A - Easily-cleaned mask support, replaceable mask and preparation method of mask - Google Patents

Abstract

The invention relates to the technical field of protective articles, in particular to an easily cleaned mask support, a replaceable mask and a preparation method, wherein the easily cleaned mask support comprises a support body and a ventilation channel, wherein the support body can be attached to the outline of a face; s1, preparing a cover cloth raw material, and cutting the raw material to a corresponding size according to the size of the support to obtain cover cloth; s2, fixing the bandage on the bracket; s3, attaching the cover cloth obtained in the step S1 on the inner side and/or the outer side of the bracket, and covering the edge of the bracket by the edge of the cover cloth; s4, fixing the clamping piece at the edge of the support to fix the cover cloth and the support, wherein the mask comprises the cover cloth, the support and the clamping piece, the cover cloth is attached to the support, the clamping piece is used for fixing, the cover cloth is convenient to replace and fix, the cover cloth is fixed in a clamping mode, different types of cover cloth can be selected to match with the support, and the use scene of the mask with the support is greatly expanded.

Description

Easily-cleaned mask support, replaceable mask and preparation method of mask

Technical Field

The invention relates to the technical field of protective articles, in particular to a support capable of being used for manufacturing a mask, the mask and a preparation method.

Background

The mask is a common protective article and is used for filtering the oral air of the mouth and the nose, and blocking harmful dust particles, gases, spray and the like so as to protect a respiratory system in use.

At present, the laminating degree of most gauze masks and face is relatively poor, and after wearing the gauze mask, there is certain ventilation channel in the alar both sides of nose, the circulation of the air of being convenient for, nevertheless to the crowd of part wearing glasses, when wearing this type of gauze mask, make glasses fog easily.

Patent CN204070649U discloses a take gauze mask of support comprises cover piece and support to through setting up the support to cover the cover piece on the support, the support has increased the space in the gauze mask, and the cover piece can be dismantled many times with the support, with trading the cover piece, realizes the used repeatedly of gauze mask support. However, in this patent, the laminating effect of gauze mask support and face is too tight, and the use is, and the air circulates through mesh and the cover cloth on the support, can not be used for the high occasion of protection level to this gauze mask when wearing, with face laminating tension, the comfort level is relatively poor.

Patent CN105407978B discloses a more general synthetic resin gauze mask is filtered to thread gluing embedded, and it has the thread gluing through injection moulding on the support, fixes filter cloth on the support through the thread gluing, realizes the dismantlement of support and filter cloth and is connected, is convenient for change filter cloth, and the support also can used repeatedly. However, in this patent, when the user uses the mask, he needs to purchase the filter cloth matched with the support, which limits the application range of the mask support, and when the filter cloth can not be purchased in an emergency situation, he can not use the mask support. Moreover, in the patent, the cover cloth is fixed with the bracket through the thread gluing, and the cover cloth needs to be pulled forcefully when the cover is detached, so that the cover cloth vibrates, the movement of germs on the cover cloth is accelerated, and the secondary pollution of the bracket and the air is easily caused.

Disclosure of Invention

One of the objectives of the present invention is to provide an easy-to-clean mask support, which has an edge that fits the contour of the face and is more comfortable to wear.

The invention provides an easy-to-clean mask support, which comprises a support body, a support body and a cleaning device, wherein the support body can be attached to the outline of a face;

the support body is including what connect gradually protect the nasal part, protect the oral area and protect jaw portion down, protect the marginal laminating in the nasal part of nasal part, protect the marginal laminating in both sides cheek of oral area, protect jaw portion edge laminating in the jaw down, just protect and have ventilative passageway between jaw portion down and the face, accessible 3D prints or injection moulding.

Further, set up on the support body and be equipped with the air vent that is used for exchanging the air, through the bleeder vent, increase air exchange area for this gauze mask support can be better use with the cooperation of breathing mask cloth.

Furthermore, protect the nasal part and keep away from the one end of protecting the oral area is equipped with the kink to the support inboard, and the outward flange and the nasal part of kink are pasted tightly.

Furthermore, the support body is made of shape memory plastics. For example, PLA macromolecular material, after the heating, the material becomes soft, then can finely tune the support according to facial property for the support can be better laminating on the face.

Further, the support body is also provided with a fixing hole for fixing the binding band. The fixing holes are positioned on two sides of the mouth guard part. When the binding band is used, the binding band passes through the fixing hole and then is knotted, so that the binding band is fixed on the bracket. This fixed mode convenient operation also is convenient for change the bandage, adjusts the length of bandage.

Further, the vent holes are in regular shapes such as circles, ellipses, triangles, quadrangles and pentagons or in other irregular shapes. And the size of the vent hole can be adjusted correspondingly according to the actual use occasion.

The invention also aims to provide a replaceable mask, which consists of the support and the cover cloth, wherein the cover cloth is attached to the support, and is fixed through a clamping piece, so that a user can conveniently make the mask, and the support can be conveniently recycled.

The utility model provides a removable gauze mask, includes foretell support to and cover cloth and be used for with cover cloth is fixed in the holder of support body, cover cloth attach to the inboard and/or the outside of support, holder detachably centre gripping in the edge of support body. The clamping piece is an elastic U-shaped clamp. The wall thickness of the elastic U-shaped clamp is 2-3 mm.

Further, the cover cloth comprises a filtering layer and a blocking layer, and the filtering layer and the blocking layer are stacked on the support. The filter layer and the barrier layer can be multilayer, so that the mask can be used more, the number of layers of the filter layer and the barrier layer can be reasonably selected, and other functional layers can be added according to actual requirements and protection levels so as to meet more requirements. Accordingly, the stacking order of the multi-layer filter layer and the multi-layer barrier layer can be freely combined according to actual requirements.

Further, the filter layer is non-woven fabric, dining table paper or kitchen paper. It should be noted that when selecting the mask cloth raw material, corresponding selection should be performed according to the scene of the mask and the required protection level, if the protection level is low, only for cold protection and warm keeping, a general non-woven fabric is selected as the filter layer, if the protection level is high, sterile materials such as medical non-woven fabric and the like are selected as the filter layer, or high-efficiency adsorption and filter materials with 99% of filtration and bacteria prevention, namely activated carbon fiber, activated carbon cloth, or the filter layers of multiple materials are combined for use; for common civil use, kitchen paper with good air permeability and good toughness can be used as a filter layer, and a certain protection effect can be achieved. Furthermore, in order to improve the protection effect, sterile plastic films such as preservative films, preservative bags and the like can be used as barrier layers and matched with paper and non-woven fabrics for kitchens, so that the function of isolating the spray is achieved. The raw materials of the cover cloth are easy to obtain, and a user can manufacture the mask by common materials in life so as to relieve the shortage, the insufficient supply and the like of the mask in emergency.

Further, still include the bandage, the bandage with the support is dismantled and is connected. The bandage is fixed on the fixed orifices of support, and the bandage can be selected by oneself, and it can to select suitable bandage according to the demand.

Furthermore, slow-release medicines can be filled in the vent holes on the mask support. The slow-release medicine can be non-woven fabrics, gauze and the like soaked with Chinese herbal medicines, or can be tablets which are directly prepared from the Chinese herbal medicines and can release medicine flavor, solid spices and the like capable of emitting various fragrances, for example, the non-woven fabrics are soaked in wormwood liquid, then the non-woven fabrics are cut into sizes matched with vent holes and are embedded into the vent holes, and when the mask is used, the wormwood flavor can play a role in refreshing and restoring consciousness. The slow-release medicine is filled in the vent holes, so that the air permeability of the vent holes is ensured, if the vent holes are filled with non-woven fabrics, the vent holes can be completely filled, if other solid medicines are used, part of the vent holes can be properly selected for filling, or only part of one vent hole is filled, and the rest part is used as an air permeable channel.

Furthermore, the cover cloth size is larger than the size of the mask support, when the cover cloth is attached to the mask support, enough margin is left to cover the mask support, the sealing performance of the cover cloth and the mask support is improved, and the mask support can be better protected from being polluted by germs. Furthermore, the size of the outer cover cloth is larger than that of the inner cover cloth, and the inner cover cloth is required to be wrapped by the outer cover cloth when the cover cloth is loaded, so that the phenomenon that the inner cover cloth contacts with external air when the mask is used, so that germs are attached to the inner cover cloth is avoided, and the protection effect of the mask is reduced.

The invention also provides a method for preparing the mask, which is convenient for a user to manufacture the mask by himself so as to cope with the shortage of masks in emergency situations.

A preparation method of the mask comprises the following steps:

s1, preparing a cover cloth raw material, and cutting the raw material to a corresponding size according to the size of the support to obtain the cover cloth; in order to facilitate the use of users, manufacturers can prepare the plane paper mold of the corresponding cover cloth according to the size of the support, and the users can cut the plane paper mold according to the provided paper mold.

S2, fixing the bandage on the bracket;

s3 attaching the cover cloth obtained in step S1 to the inner side and/or outer side of the mask frame, and covering the edge of the mask frame with the edge of the cover cloth;

s4, the clamping piece is fixed on the edge of the bracket, and the cover cloth is fixed on the bracket.

According to the mask, the mask support is covered by the cover cloth, the edge of the mask support is covered by the cover cloth, and the mask support is fixed by the clamping piece, so that no gap exists between the cover cloth and the mask support, the integrity of the mask is strong, external bacteria and the like are prevented from entering the mask from the gap between the cover cloth and the mask support, and the barrier property of the mask is reduced. In addition, in the invention, the cover cloth and the mask support are fixed through the clamping piece, when the cover cloth is disassembled, the clamping piece is directly taken down, when the clamping piece is taken, the cover cloth is not easy to vibrate, and secondary pollution caused by accelerated movement of germs on the cover cloth due to vibration is avoided.

Compared with the prior art, the invention has the following beneficial effects:

in the invention, the bracket comprises a bracket body and vent holes arranged on the bracket body, wherein the vent holes are used for air circulation inside and outside the bracket; the support body is including protecting the nasal part, protecting oral area and protecting jaw portion, and the profile of protecting the nasal part is the same with the property of nose, when using, protects the edge of arm portion and pastes the both sides at the bridge of the nose, protects the edge laminating of oral area in the both sides of cheek simultaneously, protects jaw portion and face jaw's profile the same, protects jaw portion's edge laminating on jaw, and this gauze mask support is inseparable with the laminating of face profile, protects nasal part and protects jaw portion combined action for fixing that the gauze mask can be better on the face. And, protecting chin department, having certain ventilative passageway with the face, when wearing, the air can be followed chin department and circulated, and ventilative passageway multiplicable gauze mask comfort when wearing also can avoid hot air to circulate from the alar part of the nose simultaneously, causes glasses to haze. The mask support is simple in structure, convenient to clean and disinfect and convenient to recycle.

According to the mask, the mask comprises the mask cloth, the mask support and the clamping piece, the mask cloth is attached to the mask support and then fixed by the clamping piece, the edge of the mask cloth is tightly attached to the mask support, the mask cloth is fixed in a clamping mode, different types of mask cloth can be selected to match the support, and the using scene of the mask with the support is greatly expanded; moreover, when the cover cloth is replaced, the clamping piece is only required to be taken down, and then the cover cloth is turned over, so that the contact area between the hands and the cover cloth can be reduced, and germs on the cover cloth are prevented from being adhered to the hands; meanwhile, when the cover cloth is detached, the cover cloth does not need to be torn forcefully, so that the vibration amplitude of the cover cloth is reduced, and secondary pollution is avoided.

The mask cloth is attached to the support in an edge coating mode, the mask cloth is fixed on the support through the clamping piece, the manufacturing method is simple, the mask cloth is replaceable, the support can be reused, a user can select the raw materials of the mask cloth to manufacture the mask according to the protection grade requirement, and the mask shortage under the emergency situation can be conveniently met.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic front view of a holder according to embodiment 1;

FIG. 2 is a left side view schematically showing the stent of example 1;

FIG. 3 is a schematic view showing the overall structure of the stent of example 1;

fig. 4 is a schematic front view of the mask of example 2;

fig. 5 is a partial cross-sectional view of the mask of example 2;

fig. 6 is an exploded view of the mask cloth of the mask of example 2;

fig. 7 is an overall schematic view of the elastic U-shaped clip of the mask of example 2.

Icon: 1-mask support, 11-support body, 111-nose protection part, 112-mouth protection part, 113-lower jaw protection part, 114-bending part, 12-vent hole, 13-fixing hole, 2-cover cloth, 21-kitchen paper, 22-preservative film, 3-clamping piece and 4-binding band.

Detailed Description

The technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

Example 1: as shown in figures 1-3

A mask support comprises a support body 11 which can be fitted with the outline of the face, and a vent hole 12 which is arranged on the support body 11 and used for exchanging air; in the present embodiment, the ventilation holes 12 are circular, and a plurality of ventilation holes 12 are uniformly distributed on the bracket body 11 at intervals, as shown in fig. 1.

Specifically, the bracket body 11 includes a nose guard portion 111, a mouth guard portion 112 and a chin guard portion 113 connected in sequence, as shown in fig. 2, the contour of the nose guard portion 111 is the same as the shape of the nose, and has a cavity capable of accommodating the nose. When using, the edge of protecting nose portion 111 is laminated in the nose portion the edge of protecting oral area 112 is laminated in both sides cheek, protect lower jaw 113 edge and laminate in the chin, when using the gauze mask that has this embodiment gauze mask support 1, the laminating that the edge ability of gauze mask is fine is in user's face, wears the comfort good.

In this embodiment, the mask support 1 is formed by 3D printing in one step, and in other embodiments of the present invention, the mask support 1 may be formed by injection molding. The stent body 11 is made of PLA high polymer material, and the material has a certain shape memory function. When using this gauze mask support 1 for the first time, can heat gauze mask support 1 earlier (heating temperature is in allowed band), 1 local back that softens of gauze mask support can detain gauze mask support 1 on face, according to facial shape, finely tunes gauze mask support 1 for the laminating that gauze mask support 1 can be better is on the face. Adopt shape memory material to prepare gauze mask support 1 for gauze mask support 1 can be better adaptation in different types of face, improve and wear the comfort level, simultaneously through the laminating that gauze mask support 1 after the fine setting can be high in user's face, also can avoid gauze mask gas leakage to a certain extent, improve protection level.

Preferably, in this embodiment, the end of the nose guard 111 away from the mouth guard 112 is provided with a bending portion 114 towards the inner side of the mask support 1, and the outer edge of the bending portion 114 is tightly attached to the nose, so that when the mask is used, the bending portion 114 is attached to the nose bridge, a larger space is provided for the nose, the compression of the mask to the nose is reduced, the mask is convenient to breathe, and the mask is more comfortable to wear.

Preferably, in the present embodiment, the bracket body 11 is further provided with a fixing hole 13 for fixing the binding band 4. As shown in fig. 2, the fixing holes 13 are located on both sides of the mouth guard portion 112. When in use, the bandage 4 passes through the fixing hole 13 and is knotted, and the bandage 4 is fixed on the mask support 1. This fixed mode convenient operation also is convenient for change bandage 4, adjust the length of bandage 4.

In this use neotype other embodiment, the air vent 12 that sets up on support body 11 can also be one of regular characters such as oval, triangle-shaped, quadrangle, pentagon or other irregular shapes, of course, the air vent 12 of different shapes also can use in combination to the size of air vent 12 can be according to the corresponding adjustment of actual use occasion, but it should be said that, air vent 12 should not be too big, too big can reduce the intensity of gauze mask support 1, influence the use of gauze mask support 1, and less, the preparation technology degree of difficulty is big, consume the raw and other materials more, still can influence the taking a breath of gauze mask when using.

As shown in fig. 2, in the present embodiment, two vent holes 12 are disposed at positions of the nose protector 111 corresponding to nostrils, so that air can be conveniently exchanged from the positions of the two vent holes 12, the air can directly flow out from the two vent holes 12 in an oblique downward direction, air is prevented from flowing through the nasal wings, and fogging of the glasses due to hot air flowing out from the mask is prevented.

In other embodiments of the invention, the bracket body can be used in combination with an airtight cover cloth without arranging vent holes, and when the mask is used, air inside and outside the mask circulates from the lower jaw to realize ventilation of the mask. In addition, the mask support without the vent hole can be independently used as a mask, and the mask support with the vent hole or without the vent hole can be selected according to the actual use scene.

Example 2, as shown in fig. 4 to 7, provides a mask with the mask support 1 and a method for manufacturing the mask.

A mask comprises a mask support 1 of embodiment 1, a cover cloth 2 and a clamping piece 3 used for fixing the cover cloth 2 to a support body 11, wherein the cover cloth 2 is attached to the mask support 1, the cover cloth 2 is fixed to the edge of the support body 11 through the clamping piece 3, and a bandage 4 is arranged on the mask support 1 and detachably connected with the mask support 1. The bandage 4 is fixed on the fixing hole 13 of the mask support 1, the bandage 4 can be selected by oneself, and the bandage 4 can be selected as required.

Specifically, in the present embodiment, as shown in fig. 6, cover cloths 2 are attached to both the inner side of the mask holder 1 and the outer side of the mask holder 1, wherein the cover cloth 2 attached to the outer side of the mask holder 1 is formed by sequentially laminating two layers of kitchen paper 21, one layer of plastic wrap 22 and one layer of kitchen paper 21, the kitchen paper 21 on both sides is located on the outer side, and the kitchen paper 21 on one side is located on the inner side; the mask cloth 2 attached to the inner side of the mask holder 1 is a layer of kitchen paper 21.

The method for preparing the mask comprises the following steps:

according to the using environment and the protection grade requirements of the mask, the raw materials of the corresponding mask cloth 2 are selected firstly, in the embodiment, kitchen paper 21 and a preservative film 22 are selected, the kitchen paper 21 has certain air permeability and filtering performance and can be used as a filtering layer, and the preservative film 22 has a certain barrier effect and can be used as a barrier layer; then, selecting a paper mould with a corresponding size according to the size of the mask support 1, and cutting the kitchen paper 21 and the preservative film 22 into corresponding sizes according to the paper mould;

selecting a proper bandage 4, binding the bandage 4 on the mask support 1, and adjusting the length of the bandage 4 according to the size of the head;

then, attaching the inner cover cloth 2 (i.e. a layer of kitchen paper 21) to the inner side of the mask support 1, covering the edge of the kitchen paper 21 on the outer edge of the mask support 1, and fixing the inner cover cloth 2 on the mask support 1 by using an adhesive tape or a clamping piece 3; sequentially stacking all layers of the outer side cover cloth 2, temporarily fixing the outer side cover cloth 2 by using an adhesive tape, then attaching the outer side cover cloth 2 to the outer side of the mask support 1, and wrapping the edge of the mask support 1 and the edge of the inner side cover cloth 2 by using the edge of the outer side cover cloth 2;

and finally, clamping the elastic U-shaped clamps at the edge of the mask support 1 (and the edge wrapped by the outer cover cloth 2), so that the elastic U-shaped clamps are relatively uniformly distributed at the edge of the mask support 1, and the mask is manufactured.

When the mask is used for the first time, the shape of the mask support 1 is properly adjusted according to the shape of the face before the mask is manufactured, so that the prepared mask is better in fit degree with the face.

After the mask is worn for a period of time, the disposable gloves are worn firstly, the mask is taken down from the face, the elastic U-shaped clamps and the cover cloth 2 are taken down in sequence, and the disposable gloves are used for wrapping the cover cloth 2 and then are discarded. The mask support 1 and the elastic U-shaped clamp are used repeatedly after being disinfected and sterilized.

In this embodiment, the kitchen paper 21 is used as a filter layer and the preservative film 22 is used as a barrier layer, so that the entrance of the spray into the mouth and nose can be prevented to some extent.

In this embodiment, the thickness of the elastic U-shaped clip is 3mm, and since the kitchen paper 21 has a certain thickness and the face also has a certain elasticity, when the mask is worn on the face directly, the edge of the mask is better attached to the face, and the elastic U-shaped clip with the thickness does not cause oppression to the face.

In other embodiments of the invention, the filter layer and the barrier layer can be multiple layers, so that the mask can be used in a more scene, the number of layers of the filter layer and the barrier layer can be reasonably selected, and other functional layers can be added according to actual requirements and protection levels to meet more requirements. Accordingly, the stacking order of the multi-layer filter layer and the multi-layer barrier layer can be freely combined according to actual requirements.

The filter layer can also be non-woven fabric, dining table paper and the like. It should be noted that, when selecting the raw material of the cover cloth 2, corresponding selection should be performed according to the scene of the mask and the required protection level, if the protection level is low, only for cold protection and warm keeping, a general non-woven fabric is selected as a filter layer, and if the protection level is high, a sterile material such as medical non-woven fabric is selected as the filter layer; for common civil use, the kitchen paper 21 with better air permeability and toughness can be used as a filter layer, and a certain protection effect can be achieved. Furthermore, in order to improve the protection effect, other sterile plastic films can be used as a barrier layer and used together with the paper 21 and non-woven fabrics for kitchen use, so that the function of isolating the spray is achieved. The raw material of the cover cloth 2 of the invention is easy to obtain, and the user can use common material in life to make the mask, so as to relieve the mask shortage, the supply shortage and the like in emergency.

It should be noted that, in the present invention, when the air permeability of the mask cloth 2 is poor and the air flow rate required for normal breathing cannot be satisfied, the lower jaw protection portion 113 of the mask support 1 may be appropriately adjusted, so that a certain gap is formed between the lower jaw protection portion 113 and the lower jaw, which facilitates air circulation, and of course, the gap between the nose protection portion 111 and the bridge of the nose may be adjusted according to the requirement.

Example 3:

in addition to example 2, in this example, the sustained-release drug is filled in the vent holes of the stent, wherein the sustained-release drug is a non-woven fabric soaked with wormwood liquid.

When the mask is prepared, the non-woven fabric is embedded into the ventilation holes before the cover cloth is attached, the inner cover cloth and the outer cover cloth are loaded, and the non-woven fabric can be fixed in the ventilation holes through the inner cover cloth and the outer cover cloth.

In other embodiments of the invention, other slow-release medicines can be selected to fill the mask according to different use scenes and functions of the mask, so that masks with different functions can be obtained.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. An easy-to-clean mask support is characterized by comprising a support body which can be attached to the outline of the face;

the support body is including what connect gradually protect the nasal part, protect the oral area and protect jaw portion down, protect the marginal laminating in the nasal part of nasal part, protect the marginal laminating in both sides cheek of oral area, protect jaw portion edge laminating in the jaw down, just it has ventilative passageway to protect between jaw portion and the face.

2. The easy-to-clean mask support according to claim 1, wherein the support body is provided with a vent hole for exchanging air.

3. The easy-to-clean mask support according to claim 1, wherein the support body is made of shape memory plastic.

4. A replaceable mask comprising a mask support according to any one of claims 1 to 3, a cover cloth attached to the inside and/or outside of the mask support, and a holding member for detachably holding the cover cloth to the edge of the support body, and a holding member for fixing the cover cloth to the support body.

5. The replaceable mask of claim 4 wherein said patch includes a filter layer and a barrier layer, said filter layer and said barrier layer overlying said support.

6. The replaceable mask of claim 5 wherein said filter is a nonwoven fabric, activated carbon cloth, gauze, table paper, kitchen paper.

7. The replaceable mask of claim 4 wherein said clip is a resilient U-shaped clip.

8. A replaceable mask, comprising a mask support according to claim 2, a cover cloth and a clamping member for fixing the cover cloth to the support body, wherein the cover cloth is attached to the inner side and/or the outer side of the mask support, the clamping member is detachably clamped to the edge of the support body, and the vent holes are filled with slow-release drugs.

9. The method for preparing a replaceable mask according to claim 4, comprising the steps of:

s1, preparing a cover cloth raw material, and cutting the raw material to a corresponding size according to the size of the mask support to obtain cover cloth;

s2, fixing the bandage on the mask support;

s3 attaching the cover cloth obtained in step S1 to the inside and/or outside of the mask frame, and covering the edge of the mask frame with the edge of the cover cloth;

s4, fixing the clamping piece on the edge of the mask support to realize the fixation of the cover cloth and the mask support.

10. The method of making a replaceable mask of claim 9 further comprising making said mask support by 3D printing or injection molding.

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