JP2014091012A - Mask-replaceable dustproof shield - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mask-replaceable dustproof shield capable of using a general-purpose mask including a disposable mask as the mask, where the mask is easily replaceable, in the dustproof shield with a mask having an independent and separate structure from a dustproof clothing and a dustproof hood.SOLUTION: The mask-replaceable dustproof shield includes a film-like transparent body that has at least the width of a wearer's face width, covers both eyes from the forehead to the middle of the back of the nose, notches the vicinity of the nasal apex and the mouth, and has both sides extending to the vicinity of the lower jaw. The transparent body include, at lower sides thereof, one pieces of freely detachable attachments fixed to both sides from vicinities of the cheek bones to the vicinity of the lower jaw. A mask attachment member to which the other pieces of the attachments are fixed is assembled to the transparent body such that, when the mask is placed on the lower position of the transparent body, mask strings can be clamped between itself and the transparent body.

Description

  The present invention relates to a shield that can be attached not only to a dust-free environment but also to masks in forms used in a wide range of fields such as sports, medical field, and hay fever countermeasures.

  Conventionally, in the manufacturing process of liquid crystal, semiconductors and other electronic and precision equipment, medicines and foods, food containers, and clean industries such as hospitals, in order to prevent foreign substances from entering products, dust-proof clothing, dust-proof hoods, gloves Various considerations have been made, such as wearing a mask. In particular, during work, the eyelashes and eyebrows of the operator fall off, fall off from the opening on the hood face, and use goggles that cover the eyes to deal with problems that mix with the product. However, the goggles are uncomfortable because the wearer's head is tightened by the belt for wearing when wearing, and it is not suitable for long-time use. There are problems such as the remains of goggles and there is a tendency not to be welcomed. Therefore, what uses a disposable mask with a mask instead of goggles has become widespread.

  In this type of dustproof hood, the mask is easily soiled, but the mask portion of the dustproof hood is sewn to the hood portion, so that only the mask portion cannot be easily replaced, resulting in a lack of hygiene. This is because the shield is inevitably expensive, and the mask is dirty and cannot be discarded frequently. That said, a dirty mask cannot be used indefinitely and must be discarded where appropriate, but the shield must be discarded even though it is not damaged and still has no problems. For this reason, the cost increases and unnecessary waste increases. Patent Literature 1 that recognizes this problem as a problem is presented. The present invention is a shield dustproof hood comprising a hood body, a mask body, and a transparent shield body, the hood body portion forming the hood body and covering the head of the wearer, and the hood A notch opening formed in the front of the main body, a hood shield connecting means provided in the hood main body, a mask shield connecting means provided in the mask main body of the mask body, and the shield body. And a shield mask connecting means provided on the shield body. In the shield dustproof hood of the present invention, the cutout opening formed in the front is covered with the mask body and the shield body, so that the eyebrows and eyelashes that have fallen out are prevented from falling or scattering outside the shield dustproof hood. Since only the mask body can be easily removed, it is possible to easily replace only the mask body, which is excellent in terms of hygiene and environmentally friendly.

  However, the shield dust-proof hood of Patent Document 1 has a mask, a shield, and a hood main body that are connected to each other by a dedicated connecting means, and are integrated, and a combination of these must be used. In other words, a large-scale product is required, and a specific product must be used for a mask that is frequently replaced. Regarding this problem, Patent Document 2 introduces a dustproof tool in which a mask portion can be replaced with a simple combination of a mask and a shield. If it is this structure, the shield which can replace a mask should be obtained using the dust-proof clothes and dust-proof hood which were used conventionally. However, this dust protector has a rectangular stencil at the bottom, a pair of cuts at the top, and a flexible piece on the upper side of the base plate, which has through holes to be ear holes on both ends. Adhering, folding the hanging plate, bonding both legs of the portal plate to one part of the hanging plate, and adopting a structure in which both legs of the transparent plate are detachably inserted into the notch. Since the base plate in this dustproof device covers the mouth from the nose part over the ear, it is presumed that it also serves as a dustproof mask, but it is not assumed to be disposable and replaceable, It is only described that the transparent plate can be removed and cleaned. As mentioned above, this base plate is made of a special structure, so it is not a consumable product.If the usage pattern becomes dirty, the transparent plate and the base plate are separated, and the transparent plate is wiped or washed. It is understood that the base plate is used in a one-to-one manner while being cleaned by dusting or washing. Therefore, this dustproof tool must use a specific base plate, lacks versatility, and cannot easily change the mask even if there is a sanitary demand.

JP 2011-1659 “Shield Protective Hood” issued on January 6, 2009 Microfilm "Dust-proofing tool" taken from actual application No. 55-101922 (Japanese Utility Model Publication No. 55-19651) Published February 7, 1980

  The present invention solves the above problems, that is, a shield with a mask that is a separate structure independent of dust proof clothing and dust hood, and can use a general-purpose mask including a disposable mask as a mask, An object of the present invention is to provide a mask-replaceable dustproof shield in which only the mask portion can be easily replaced.

  The dust-replaceable shield according to the present invention is a film having a shape that extends from the forehead to the back of the nose at least at the wearer's face width, covers both eyes, cuts out near the nose tip and mouth, and extends on both sides to the lower jaw The transparent body has one of the fasteners separable on both sides from the vicinity of the cheekbone to the vicinity of the lower jaw on a lower side of the transparent body, and is fixed at a plurality of positions on the lower side of the transparent body. A mask mounting member to which the other of the fasteners is fixed is combined so that the mask string can be held between the transparent body when the mask is placed.

  In one form of the dust-replaceable shield capable of replacing a mask according to the present invention, the mask mounting member is an extension form of a bias tape taped around the sides of the transparent body, and the extension string is folded to fold the mask string. The fastener is engaged with the transparent body while being clamped.

  In one form of the dust-replaceable shield of the present invention, the mask mounting member is a mesh cloth having substantially the same shape as the lower shape of the transparent body, and the periphery of the mesh cloth is edged with a bias tape, and the bias tape The mesh cloth edged in (1) is overlapped on the lower part of the transparent body, and the clasp of the mask is sandwiched between the transparent body and the fastener is engaged.

  In one form of the dust-replaceable shield according to the present invention, the mask mounting member is a rectangular mesh cloth that covers the lower part of the transparent body, and the periphery of the mesh cloth is edged with bias tape, A mesh cloth bordered with a bias tape is overlapped on the lower part of the transparent body, and a clasp of the mask is sandwiched between the transparent body and the fastener is engaged.

  In a variation of the dust-replaceable shield according to the present invention, the mask attachment member is configured such that a mesh cloth, which is edged with bias tape, is stacked on the lower part of the transparent body and the mask string is sandwiched between the transparent body. The bias tape on both sides of the transparent body is an extended form of the bias tape with the periphery of both sides of the transparent body.

The mask-replaceable dust-proof shield of the present invention is a removable fastener that is placed on the lower side of the transparent body and fixed on both sides of the lower side of the transparent body from the vicinity of the cheekbone to the vicinity of the lower jaw. Since the mask string can be clamped between the transparent body and the other one of the fasteners attached to the mask attachment member, a disposable mask is used in combination with the mask. I can do it. As a result, costly shields can be used repeatedly, and the operating cost can be reduced by replacing only inexpensive disposable masks. Benefits.
In addition, the mask-replaceable dust-proof shield of the present invention has an integral structure of the shield and the mask, so that the eyelashes and eyebrows that have fallen out are held inside the mask mounting member or inside the mask and scattered outside. There is no.

  The mask-replaceable dust-proof shield of the present invention can stably hold the shield and the mask in a predetermined position on the face by the mask string on the ear or the back of the head. It is not interfered with and can be used in combination with what is already used. Compared to a shield and mask combined with a dust hood, the cost advantage is great.

  The dust-replaceable shield of the present invention has a shape in which the transparent body is cut out in the vicinity of the nose tip and the mouth, so if a mask mounting member that does not block this region is used, a three-dimensional shape mask can be used. Is possible. In addition, when the mask mounting member is a rectangular mesh cloth that covers the lower part of the transparent body, the entire mask surface can be covered with the mask mounting member with respect to the non-three-dimensional shape type mask. There is an increase effect. Further, the mask mounting member, which is an extension form of the bias tape in which the bias tape on both sides of the mask is trimmed around the both sides of the transparent body, the transparent body and the mask mounting member can be an integrated structure, It is easy and convenient to stop the fastener by folding it when holding the mask.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows 1st Embodiment of the dust-proof shield which can replace the mask based on this invention, Comprising: A showed the shield main body, B the general purpose disposable mask used together, C showed the form which loaded the mask Is. It is a figure which shows 2nd Embodiment of the dust-proof shield which can replace the mask which concerns on this invention, Comprising: A is a transparent body of a shield, B is a mask attachment member, C is a three-dimensional mask used together, D is The form in which the mask is loaded is shown. It is a figure which shows 3rd Embodiment of the dust-proof shield which can replace the mask based on this invention, Comprising: It is a modification of what was shown in FIG. It is a figure which shows 4th Embodiment of the dust-proof shield which can replace the mask which concerns on this invention, Comprising: A is a transparent body of a shield, B is a mask attachment member, C is a three-dimensional mask to use, D is the It is a perspective view of what showed the form which loaded the mask. It is a figure which shows 3rd Embodiment of the dust-proof shield which can replace the mask which concerns on this invention, Comprising: A showed the shield main body, B the general purpose disposable mask used together, C showed the form which loaded the mask Is. It is a figure which shows the modification of the dust-proof shield which can replace the mask which concerns on this invention, Comprising: A is a transparent body of a shield, B upper stage is the surface of a mask attachment member, B lower stage is the back surface of a mask attachment member, C is The form which loaded the general-purpose disposable mask is shown. The example which wore the dust-proof shield which can replace the mask concerning this invention with the dust-proof hood is shown. It is a figure which shows the example which coat | covers the cheek part of a film back surface with a cloth material.

  FIG. 1 shows a first embodiment of a dust-replaceable shield according to the present invention. A shows the surface side of the shield body. The film-like transparent body 1 that serves as a shield has a width exceeding the wearer's face width, covers from the forehead to the back of the nose, covers both eyes, cuts off the nose tip and the mouth, and both sides 1a extend to the lower jaw It becomes the shape to do. The periphery of the transparent body 1 is edged with a bias tape 3. On the lower side, one of the fasteners 4a which can be detached from both sides of the cheekbone and the vicinity of the lower jaw is fixed at two locations. The mask mounting member 2 is made of a coarse mesh cloth having good air permeability and is formed in a substantially rectangular shape, and its periphery is bordered by a bias tape 3. In the figure, the mask mounting member 2 is connected as an extension of the bias tape 3 with the periphery of both sides of the transparent body 1, and the other side 4b of the fastener is fixed to both sides. The composition is taken. For the loading of the mask, a general-purpose disposable mask 5 as shown in FIG. B is placed on the lower side of the transparent body 1, the mask mounting member 2 is folded at the connecting portion, and the string of the mask 5 is attached to the transparent body. The pair of fasteners 4a and 4b are fastened so that they can be clamped between them. By passing the lower string of the mask through the loop of the bias tape 3 that can be formed at the lower end, the upper string of the mask presses both sides 1a of the transparent body 1 extending to the vicinity of the lower jaw from above to the cheek. The mounting stability of the dust shield of the present invention can be improved. In this embodiment, the mask mounting member 2 has a substantially rectangular shape and covers the mask from the outside. Therefore, the mask mounting member 2 is not suitable for a three-dimensional mask and is used for a flat mask as shown in FIG. Since it is configured as described above, it is independent of the dust-proof clothing and dust-proof hood, and the mask-replaceable dust-proof shield of the present invention can be used while using the conventional dust-proof clothing and dust-proof hood as they are. it can. In addition, since disposable masks that are generally popular can be loaded in a replaceable manner, only a mask that is easily contaminated can be replaced as appropriate, and the costly transparent body 1 can be continuously used. As a transparent film material, it is desirable to use an acetate film type antifogging function which is difficult to fog. The mask is not limited to the ear hook type, but may be an overhead type as shown in FIGS.

In the embodiment shown in FIG. 1, the mask mounting member 2 is connected as an extension of the bias tape 3 with the periphery of both sides of the transparent body 1, but the mask mounting member 2 is separated from the transparent body 1 separately. It can also be a body configuration. In the case of this form, there is no loop for turning back the bias tape 3. Therefore, as shown in the embodiment of FIG. 2, the lower fasteners 4a and 4b are paired and the lower string of the mask is passed between them. The stability of the mask 5 is improved. Further, in the above embodiment, the back surface of the transparent body 1 is in direct contact with the user's cheek when used, but there is a tendency to dislike this touch. In that case, the transparent body 1 as shown in FIG. The cloth 7 can be pasted on the lower part of the back of the skin to improve the skin feel.
The fastener is not limited to the snap form shown in the figure, and an appropriate one such as Velcro (registered trademark) can be used.

  FIG. 2 shows a second embodiment of the dust-replaceable shield capable of replacing a mask according to the present invention. This form is a universal type that can be applied to a three-dimensional mask. As shown in FIG. 7B, the mask mounting member 2 is not rectangular but is characterized by a shape in which the nose tip and the vicinity of the mouth are cut out in the same manner as the transparent body 1. This mask mounting member 2 is also made of a coarse mesh cloth having good air permeability, and its periphery is bordered by bias tape 3. In this example, the main body of the mask 5 is not sandwiched, but only the string portion is sandwiched. Therefore, in order to improve the adhesion of the mask mounting member 2 that overlaps the transparent body 1, the number of pairs of fasteners is increased. Yes. Incidentally, in this example, the fastener 4a is also fixed to the central lower position of the transparent body 1. Moreover, since the illustrated example has a separate structure in which the transparent body 1 and the mask mounting member 2 are separated from each other, two pairs of lower fasteners are attached. Accordingly, the mask attaching member 2 is attached to a bias tape 3 in which the other fastener 4b is trimmed at a corresponding position. In this form of mask loading, for example, a three-dimensional mask 5 as shown in FIG. C is placed at a lower position of the transparent body 1 shown in FIG. The mask attachment member 2 is stacked from above, and a plurality of pairs of fasteners 4a and 4b are fastened together so that the string of the mask 5 can be sandwiched between the transparent body 1 and the embodiment shown in FIG. It becomes. In this embodiment, the mask mounting member 2 has a shape in which the nose apex and the vicinity of the mouth are cut out in the same manner as the transparent body 1, so that the protrusion of the three-dimensional mask is not constrained. Can be used. This embodiment is not dedicated to a three-dimensional mask, but can be loaded with a general disposable mask and has a function applicable to various masks. The dust shield in this form is also independent of the dust proof clothing and dust hood, and can be used while using the conventional dust proof clothing and dust hood as is, and the commonly used disposable mask can be replaced. As in the previous embodiment, it is possible to replace only the mask that is easily soiled by being able to be loaded, and the transparent body 1 that is expensive can be used continuously. Further, the problem of skin touch is that the cloth 7 can be applied to the lower part of the back surface of the transparent body 1 as shown in FIG.

  In the embodiment shown in FIG. 2, the mask mounting member 2 is separated from the transparent body 1 and has a separate structure. However, as shown in FIG. 3, the mask mounting member 2 borders the periphery of both sides of the transparent body 1. As an extended form of the bias tape 3, both can be connected. In that case, unlike B in FIG. 2, the mask mounting member 2 is turned upside down and turned over, and the lower end portions are connected by the bias tape 3. In the case of this form, the loop of the bias tape 3 can be folded. Therefore, as shown in the embodiment of FIG. 1, the lower fasteners 4a and 4b are paired and the lower string of the mask is passed through the loop part. Thus, the loading stability of the mask 5 can be improved. Further, the mask used in the present invention is not limited to the ear hook type, but may be an overhead type as shown in FIG.

  The embodiment shown in FIG. 4 is in a form suitable for using a three-dimensional mask. The shield 1 is formed as a single unit as shown in FIG. A, and the periphery thereof is edged with bias tape. As shown in B, the mask mounting member 2 is cut off at the portion corresponding to the mouth of the user and is meshed with a fine U-shaped fine mesh cloth 2a that is soft to the touch, and has no notch. A substantially square mesh cloth 2b is connected by bias tape that borders both sides. One of the fine mesh cloth 2a and the coarse mesh cloth 2b are bordered by bias tape, and the coarse mesh cloth 2b is bordered by bias tape. The coarse mesh cloth 2b is loosely swelled and bordered to wrap around the projection of the three-dimensional mask. In this example, an overhead type band 8 is attached to the mask attaching member 2 so that the shield 1 can be firmly fixed to the user's head regardless of the mask 5. An adjustment tool 8a that can be adjusted according to the size of the user's head is provided. The present invention is not limited to this example, and the present invention can employ such a band 8 in any of the embodiments as required. As shown in FIG. 4A, the shield 1 has fasteners 4a-1, 4a-2, 4a-3 attached to the central lower side and the left and right sides, and the mask mounting member 2 is shown in FIG. 4b-1, 4b-4, 4b-5 at the center of the upper side and at the lower side of both sides of the fine mesh cloth 2a, and fasteners 4a at the top and bottom of the two sides of the coarse mesh cloth 2b. -4, 4a-5 and 4b-2, 4b-3 are installed. The shield 1 is turned upside down, and the center fastener 4a-1 is fixed to the fastener 4b-1 of the fine mesh cloth 2a with the surface facing down. Next, a three-dimensional mask 5 as shown in FIG. 4C is placed on the cut-out portion of the fine mesh cloth 2a with the protrusions on the lower side of the paper, and the coarse mesh cloth 2b is folded back to shield 1 and the mask. 5 is held between the mask mounting members 2. At that time, the clasps 4b-4, 4b-5 of the fine mesh cloth 2a and the clasps 4a-4, 4a-5 of the coarse mesh cloth 2b are combined, but the mask is applied to the loop portion of the folded bias tape. The stability of the mask 5 is improved by passing the lower string. Then, the fasteners 4b-2 and 4b-3 of the coarse mesh cloth 2b are stopped in pairs with the fasteners 4a-2 and 4a-3 of the shield 1. FIG. 4D shows a form in which the shield 1 and the mask 5 are sandwiched and combined by the mask mounting member 2.

  FIG. 5 shows a third embodiment of the dust-replaceable shield with mask exchange according to the present invention. A shows the surface of the shield body. As in the previous two examples, the film-like transparent body 1 serving as a shield has a width that exceeds the width of the wearer's face, covers the eyes from the forehead to the back of the nose, cuts out the nose apex and the vicinity of the mouth. The part 1a has a shape extending to the vicinity of the lower jaw. The periphery of the transparent body 1 is edged with a bias tape 3. On the lower side, one of the fasteners 4a which can be detached from both sides of the cheekbone and the vicinity of the lower jaw is fixed at two locations. The mask mounting member 2 has the simplest configuration, and has a configuration in which left and right bias tapes 3 are connected by a wide bias tape 6 at the upper end without using a fabric. In the figure, the mask mounting member 2 is connected as an extension form of the bias tape 3 with the periphery of both sides of the transparent body 1 being connected, and the other side 4b of the fastener is fixed to both sides. The structure is taken. For the loading of the mask, a general-purpose disposable mask 5 as shown in FIG. B is placed on the lower side of the transparent body 1, the mask mounting member 2 is folded at the connecting portion, and the string of the mask 5 is attached to the transparent body. The pair of fasteners 4a and 4b are fastened so that they can be clamped between them. By passing the lower string of the mask through the loop of the bias tape 3 that can be formed at the lower end, the upper string of the mask presses both sides 1a of the transparent body 1 extending to the vicinity of the lower jaw from above to the cheek. The mounting stability of the dust shield of the present invention can be improved. In this embodiment, the mask mounting member 2 is a U-shaped bias tape, and has a non-interfering shape with respect to the mask, so that it can be used for a three-dimensional mask. Since it is configured as described above, it is also independent of the dust-proof clothing and dust-proof hood, and can be used while using the conventional dust-proof clothing and dust-proof hood as is. As in the above-described example, it is possible to replace only the mask that is easily contaminated and replace the costly transparent body 1 continuously.

  In this embodiment, the mask mounting member 2 can also be separated from the transparent body 1 to have a separate structure. In this case, since there is no loop for turning back the bias tape 3, as described in the previous example, the lower fasteners 4a and 4b are paired, and the lower string of the mask is passed between them to pass the mask 5 To improve the stability. Further, in the above embodiment, the back surface of the transparent body 1 is in direct contact with the user's cheek when used, but there is a tendency to dislike this touch. In that case, the transparent body 1 as shown in FIG. The cloth 7 can be pasted on the lower part of the back of the skin to improve the skin feel.

  Next, a modification of the dust-replaceable shield according to the present invention shown in FIG. 6 will be described. The transparent body 1 of the shield shown in FIG. A is a film-like transparent body 1 serving as a shield, and has a width exceeding the face width of the wearer. However, it differs in that it has a shape that does not have both side parts 1a extending to the vicinity of the lower jaw and extends to the cheeks. The mask is not sandwiched between the transparent body 1 and the mask mounting member 2 but is wrapped around the mask mounting member 2. The periphery of the transparent body 1 is edged with a bias tape 3, and one of a plurality (three in this example) of fasteners 4a is fixed at a substantially equal position below the transparent body 1. The mask attachment member 2 combined with the transparent body 1 is a rectangular mesh cloth with good air permeability, and the other side 4b of the fastener fixed to the transparent body 1 is attached to the upper side of the mesh cloth. One of the detachable fasteners is fixed at a plurality of locations on the upper side of both sides of the mask mounting member 2, and the other of the detachable fasteners is symmetrically positioned on the lower side of both sides of the mask mounting member. When the mask is placed on the upper side position of the mask mounting member and the lower side of the mask mounting member is folded back, the lower portion of the mask is clamped to the folded portion, thereby The strap is passed between the two sets of fasteners so that the strap does not come off from both sides 1a of the transparent body 1 which extends only to the cheeks. desirable. The upper part of FIG. B shows the front surface side of the mask attachment member, and the lower part of FIG. B shows the rear surface side of the mask attachment member. FIG. C shows a form in which a general-purpose disposable mask is loaded in this modification. In addition, the mask mounting member corresponding to this implementation may be formed into two rectangular shapes instead of being folded, and the mask may be sandwiched between them. In this case, it will be easily understood from the explanation in the previous example that it is preferable that the lower fastener is also set in two sets, and the lower string of the mask is passed between them.

  The dust-replaceable shield according to the present invention is not limited to dust-free environments, but can be used lightly and comfortably without using a goggle, such as for sports, for medical use, and for hay fever. Can be expected to use.

1 Transparent body
1a Both sides 2 (2a, 2b) of transparent body Mask attachment member 3 Bias tape 4 (4a, 4b) Fastening member 5 Mask 6 Wide bias tape 7 Soft fabric 8 Overhead band
8a Adjuster

Claims (5)

  At least the wearer's face width from the forehead to the back of the nose, covering both eyes, and having a film-like transparent body with a shape in which both the side of the nose and the mouth are cut out and the both sides extend to the vicinity of the lower jaw, On the lower side, one of the detachable fasteners is fixed to both sides from the vicinity of the cheekbone to the vicinity of the mandible, and when the mask is placed on the lower side of the transparent body, the string of the mask is attached. A dust-replaceable shield with a replaceable mask formed by combining a mask mounting member to which the other end of the fastener is fixed so as to be sandwiched between the transparent body.   The mask attaching member is a mesh cloth having substantially the same shape as the lower shape of the transparent body, and a peripheral portion of the mesh cloth is edged with bias tape, and the mesh cloth edged with the bias tape is attached to the lower portion of the transparent body. The mask-replaceable dust-proof shield according to claim 1, wherein the clasp is held between the transparent body and the clasp of the mask so as to be engaged with the clasp.   The mask mounting member is a rectangular mesh cloth that covers a lower portion of the transparent body, and a peripheral portion of the mesh cloth is edged with bias tape, and the mesh cloth edged with the bias tape is attached to the lower side of the transparent body. The mask-replaceable dust-proof shield according to claim 1, wherein the clasp of the mask is sandwiched between the transparent body and the fastener is engaged with the mask string.   The mask-replaceable dust-proof shield according to any one of claims 1 to 3, wherein the mask attachment member is formed by extending a bias tape on both sides of the mask, and the periphery of both sides of the transparent body. .   At least the wearer's face width extends from the forehead to the back of the nose and is equipped with a film-like transparent body that covers both eyes. The mask attachment member combined with the transparent body is a rectangular mesh cloth, and the other of the fasteners fixed to the transparent body is attached to the mask attachment member at a corresponding position, One of detachable fasteners is fixed to a plurality of positions on both sides of the mask mounting member, and the other of the detachable fasteners is below the mask mounting member or on a separate mask mounting member. Is fixed at the corresponding position, and when the mask is loaded, the mask is placed on the mask mounting member and is sandwiched by the mask mounting member from both sides so that the mask and the transparent body are combined. With features Mask replaceable dust-proof shield that.

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