Protective mask and protective mask with mask

Abstract

The invention provides a protective mask which can be easily used in combination with various types of masks and a protective mask with a mask. The solution of the present invention is a protective mask (1-1) which can be attached to and detached from a mask (2) and which covers at least the eyes of the face of a user wearing the mask (2), the protective mask (1-1) comprising a flexible and translucent film (101-1). At least one pair of cutout lines (102L, 102R) through which the straps (202) of the mask (2) can pass are formed on the left and right side portions of the protective mask (1-1), and the cutout lines (102) have engagement portions (102a, 102b) that engage with the straps (202) passing through the cutout lines (102).

Description

[0001] This invention is a divisional application of the invention application with application number 2021800308186, application date April 23, 2021, and invention title "Protective Face Shield and Protective Face Shield with Mask". Technical Field

[0002] This invention relates to a protective face shield and a protective face shield with a mask. Background Technology

[0003] In medical settings, masks and face shields are used as protective equipment to prevent infection from droplets or airborne pathogens such as viruses, as well as from the adhesion of droplets such as blood and bodily fluids. Masks cover the user's respiratory organs (specifically, the mouth and nose) to prevent infection via the respiratory system. Face shields cover at least the eyes of the user's face to prevent infection via the eyes. By using masks and face shields together, infection of medical workers can be effectively prevented. Therefore, a face shield with a face shield attached to a mask has been proposed (for example, see Patent Document 1).

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 7-178117 Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] However, masks come in a wide variety of types depending on their intended use. For example, there are medical masks such as surgical masks and particulate masks, dust masks for professional users, and masks for general users such as non-woven masks and gauze masks. These masks vary in size, material, and structure depending on their purpose, function, and level of protection. Therefore, to improve the convenience of wearing masks and face shields, it is desirable to selectively combine face shields with various types of masks. Thus, for example, in medical settings, it is possible to easily combine masks and face shields according to the required level of protection. Furthermore, for example, in situations where a large number of face shields with masks are needed due to a rapid spread of infectious diseases, it is possible to quickly prepare face shields with masks.

[0009] However, in conventional technologies, it is difficult to selectively combine protective face shields with various types of masks. For example, in the protective face shield with a mask disclosed in Patent Document 1, the protective face shield is bonded and fixed to the mask by adhesives or the like. Therefore, it is difficult to replace the protective face shield with other masks.

[0010] Therefore, in view of such issues, the object of the present invention is to provide a protective face shield that can be easily combined with various types of masks, as well as a protective face shield with a mask.

[0011] Methods for solving problems

[0012] To address the aforementioned issues, the protective face shield of the present invention is a face shield that is easily removable from and covers at least the eyes of the user's face, as opposed to a mask. The face shield includes a flexible and light-transmitting membrane, and at least one pair of slits are formed on the left and right sides of the face shield for the passage of the mask straps. The slits have engaging portions that engage with the straps passing through the slits.

[0013] The locking mechanism can restrict the movement of the strap in two directions: the direction in which the strap passes through the slit line and the direction along the slit line.

[0014] Alternatively, the membrane on both sides of the interlocking part of the slit line can be used to clamp the tape passing through the slit line.

[0015] Alternatively, the slit line can be a closed slit line that does not intersect with the outer edge of the face shield but is wrapped inside the face shield. The locking parts are formed at both ends of the closed slit line. Two straps extending from one side of the mask in the left-right direction pass through one closed slit line formed on one side of the face shield in the left-right direction, and the two straps are locked with the two locking parts formed at both ends of the closed slit line.

[0016] Alternatively, multiple pairs of closed-off slits can be formed on the left and right sides of the protective mask, with the spacing between the pairs of closed-off slits varying for each pair.

[0017] Alternatively, the cut line is an open cut line with one end intersecting the outer edge of the protective mask and the other end positioned on the inner side of the protective mask. The engaging part is formed at the other end of the open cut line. Two pairs of open cut lines are formed side by side in the vertical direction on the left and right sides of the protective mask. Two straps extending from one side of the mask in the left and right direction pass through the two open cut lines formed on one side of the protective mask in the left and right direction, and the two straps engage with the two engaging parts formed at the other end of the two open cut lines.

[0018] The engaging part can also be a section where the cut line is formed in a serrated shape.

[0019] The interlocking part can also be the part where the cut line forms a branch.

[0020] The engaging part can also be the part where the cut line bends.

[0021] To address the aforementioned issues, the protective face shield of the present invention can be a face shield that is easily removable from and covers at least the eyes of the user's face, relative to a mask. The face shield includes a flexible and light-transmitting membrane, and at least one pair of deformable portions are formed on the left and right sides of the face shield. The deformable portions are deformed to form a hoop through which the straps of the mask can pass.

[0022] Alternatively, the variable part can be deformed because it is partially cut along the slit line formed on the protective mask, and the hoop engages with the strap passing through the hoop.

[0023] Alternatively, on one side of the protective mask in the left and right directions, two or more clamps are formed at intervals in the left and right directions by the deformation of the variable part, and the upper strap of the mask passes through the two or more clamps.

[0024] Alternatively, on one side of the protective mask in the left-right direction, two or more variable parts are formed at intervals in the left-right direction, and two or more clamping parts are formed by deformation of the two or more variable parts.

[0025] Alternatively, when the strap on the upper side of the mask passes through more than two clamps, the clamps can move relative to the strap in the direction in which the strap passes.

[0026] Alternatively, an insertion part consisting of a cut line can be formed in the protective mask adjacent to the variable part, and a hoop can be formed by inserting the variable part into the insertion part.

[0027] Alternatively, the variable part may have a locking claw that locks the variable part into the insertion part.

[0028] Alternatively, a notch may be formed in the protective mask at a position opposite to the user's breathing organs.

[0029] Alternatively, a through-hole may be formed in the protective mask at a position opposite to the user's breathing organs, or at a position to the side or below the position opposite to the breathing organs.

[0030] Alternatively, the protective mask may have a bend that can bend toward the user's face, either at a position opposite the user's nose or at a position below the nose.

[0031] Alternatively, the protective mask may have a bend that can bend toward the user's face at a position opposite the user's forehead or front of the head.

[0032] Alternatively, the protective mask may have a bend that can bend toward the user's face at a position opposite the user's chin or at a position below the chin.

[0033] Alternatively, a bending line can be provided between the front and side portions of the user's face in the protective mask, and the side portion can be bent along the bending line relative to the front portion.

[0034] Alternatively, an anti-reflective layer may be provided on at least one side of the protective mask.

[0035] The anti-reflective layer can be a tiny uneven structure with spacing below the wavelength of visible light.

[0036] The total light transmittance of the protective face shield can be over 94.0%.

[0037] The protective face shield can have an assembly structure that can be assembled into a shape that tapers at the front end as it moves away from the user's face.

[0038] To address the aforementioned issues, the protective face shield of the present invention comprises the aforementioned protective face shield and a face mask that allows for easy assembly and disassembly of the aforementioned protective face shield.

[0039] Invention Effects

[0040] According to the present invention, protective face shields can be easily combined with various types of masks. Attached Figure Description

[0041] [ Figure 1 [Illustration 1] is a plan view showing a protective face shield according to a first embodiment of the present invention.

[0042] [ Figure 2 [Image 1] is a perspective view showing the protective face shield of the first embodiment of the present invention in use.

[0043] [ Figure 3 [This is used to describe the protective face shield that can be assembled with the first embodiment of the present invention.] Figure 1 Images of different face masks.

[0044] [ Figure 4 [Illustration 1] is a plan view showing a protective face shield according to a second embodiment of the present invention.

[0045] [ Figure 5 [Image 1] is a perspective view showing the protective face shield of the second embodiment of the present invention in use.

[0046] [ Figure 6 [Illustration 1] is a plan view showing a protective face shield according to a third embodiment of the present invention.

[0047] [ Figure 7 [Illustration 1] is a plan view showing a protective face shield according to a fourth embodiment of the present invention.

[0048] [ Figure 8[This is a perspective view showing the protective face shield of the fourth embodiment of the present invention in use.]

[0049] [ Figure 9 [Illustration 1] is a plan view showing a protective face shield according to a fifth embodiment of the present invention.

[0050] [ Figure 10 [Image 1] is a perspective view showing the protective face shield of the fifth embodiment of the present invention in use.

[0051] [ Figure 11 [Illustration 1] is a plan view showing a protective face shield according to a sixth embodiment of the present invention.

[0052] [ Figure 12 [This is a perspective view showing the protective face shield of the sixth embodiment of the present invention in use.]

[0053] [ Figure 13 [Illustration 1] is a plan view showing a protective face shield according to the seventh embodiment of the present invention.

[0054] [ Figure 14 [This is a partially enlarged cross-sectional view showing the protective face shield according to the seventh embodiment of the present invention.]

[0055] [ Figure 15 [ ] is a table showing various conditions for the surface treatment of the membrane.

[0056] [ Figure 16 [ ] is a graph showing the transmittance characteristics of the membrane under various surface treatment conditions.

[0057] [ Figure 17 [Illustration 1] is a plan view showing the protective face shield according to the eighth embodiment of the present invention.

[0058] [ Figure 18 [Illustration 1] is a plan view showing a protective face shield according to the ninth embodiment of the present invention.

[0059] [ Figure 19 [Illustration 1] is a plan view showing a protective face shield according to the tenth embodiment of the present invention.

[0060] [ Figure 20 [1] is a perspective view showing the protective face shield of the tenth embodiment of the present invention in use.

[0061] [ Figure 21 [Illustration 1] is a plan view showing the protective face shield according to the eleventh embodiment of the present invention.

[0062] [ Figure 22 [Illustration 1] is a plan view showing a protective face shield according to the twelfth embodiment of the present invention.

[0063] [ Figure 23[Illustration 1] is a plan view showing a protective face shield according to the thirteenth embodiment of the present invention.

[0064] [ Figure 24 [Illustration 1] is a plan view showing a protective face shield according to the fourteenth embodiment of the present invention.

[0065] [ Figure 25 [Illustration 1] is a plan view showing a protective face shield according to the fifteenth embodiment of the present invention.

[0066] [ Figure 26 [Image 1] is a perspective view showing the protective face shield of the fifteenth embodiment of the present invention in use.

[0067] [ Figure 27 [Illustration 1] is a plan view showing a protective face shield according to the sixteenth embodiment of the present invention.

[0068] [ Figure 28 [This is a schematic diagram showing the state of the variable part before and after deformation according to the sixteenth embodiment of the present invention.]

[0069] [ Figure 29 [ ] is a cross-sectional view showing the deformed state of the variable part according to the sixteenth embodiment of the present invention.

[0070] [ Figure 30 [Illustration 1] is a plan view showing a protective face shield according to the seventeenth embodiment of the present invention.

[0071] [ Figure 31 [This is a schematic diagram showing the state of the variable part before and after deformation according to the seventeenth embodiment of the present invention.]

[0072] [ Figure 32 [This is a perspective view showing the protective face shield of the seventeenth embodiment of the present invention in use.]

[0073] [ Figure 33 [Illustration 1] is a plan view showing the protective face shield according to the eighteenth embodiment of the present invention.

[0074] [ Figure 34 [Illustration] is a schematic diagram showing the state of the variable part before and after deformation according to the eighteenth embodiment of the present invention.

[0075] [ Figure 35 [Illustration 1] is a plan view showing a protective face shield according to the nineteenth embodiment of the present invention.

[0076] [ Figure 36 [This is a schematic diagram showing the state of the variable part before and after deformation according to the nineteenth embodiment of the present invention.]

[0077] [ Figure 37 [Image 1] is a perspective view showing the protective face shield of the nineteenth embodiment of the present invention in use.

[0078] [ Figure 38 [Illustration 1] is a plan view showing a protective face shield according to the twentieth embodiment of the present invention.

[0079] [ Figure 39 [Illustration 1] is a schematic diagram showing the state of the variable part before and after deformation according to the twentieth embodiment of the present invention.

[0080] [ Figure 40 [Illustration 1] is a plan view showing the protective face shield according to the twenty-first embodiment of the present invention.

[0081] [ Figure 41 [ ] is a schematic diagram showing the state of the variable part before and after deformation according to the twenty-first embodiment of the present invention. Detailed Implementation

[0082] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific values ​​shown in these embodiments are merely illustrative to facilitate understanding of the invention and do not limit the invention unless specifically stated otherwise. It should be noted that in this specification and the accompanying drawings, elements having substantially the same function or structure are omitted from repeated description by using the same reference numerals. Furthermore, elements not directly related to the present invention are omitted from the illustrations.

[0083] <First Implementation Method>

[0084] Reference Figures 1-3 The protective face shield 1-1 of the first embodiment of the present invention will be described.

[0085] Figure 1 This is a plan view showing the protective face shield 1-1. Figure 2 This is a perspective view showing the protective face shield 1-1 in use.

[0086] like Figure 1 As shown, the protective face shield 1-1 can be easily installed and removed from the mask 2, and is used when installed on the mask 2. When using the protective face shield 1-1, as follows... Figure 2As shown, a user (e.g., a medical professional) wears a mask 2 equipped with a protective face shield 1-1. The mask 2 covers the user's respiratory organs (nose and mouth) and their surroundings. The protective face shield 1-1 is configured to cover the user's face while being supported by the mask 2, extensively covering the front and sides of the user's face from the outside of the mask 2. In this way, a protective face shield equipped with a mask and a protective face shield 1-1 is used. This, for example, prevents viruses or bacteria contained in airborne droplets, or droplets such as blood or bodily fluids generated during surgery or treatment, from adhering to the user's face or entering the respiratory organs or eyes. Therefore, infection can be effectively prevented for medical professionals and others.

[0087] Furthermore, in the accompanying drawings referenced in this specification, the forward, backward, left, right, up, and down directions, based on the user, are respectively represented as F direction, B direction, L direction, R direction, U direction, and D direction.

[0088] Mask 2 covers the respiratory organs (specifically, the mouth and nose) of the wearer to prevent infection via the respiratory organs. It should be noted that in this instruction manual, the respiratory organs only need to include at least the mouth, or may include both the mouth and nose. Figure 1 As shown, the mask 2 has a main body 201 and straps 202.

[0089] The main body 201 is the part that faces and covers the user's respiratory organs during use. The main body 201 is breathable and functions to prevent the intrusion of viruses or bacteria contained in droplets. The main body 201 may have a structure consisting of multiple layers of filter material made of various materials. In particular, when the mask 2 is a medical mask such as a surgical mask, the mask 2 preferably has excellent liquid protection against blood, bodily fluids, etc., and excellent ability to capture bacteria and particles contained in airborne droplets.

[0090] The strap 202 is worn on any part of the user's head during use (e.g., on...). Figure 2 The mask 2 has straps 202 (for the ears). The mask 2 has at least two straps 202 on each side of the main body 201, for a total of at least four straps 202 on both sides. The straps 202 can be ear-loop type (see [reference]). Figure 1 , Figure 2 ), tethered type (refer to) Figure 3 Headset (refer to) Figure 23 , Figure 24 It can be any of the types in ), or other types.

[0091] exist Figure 1 , Figure 2In the example of the ear-hook strap 202 shown, two straps 202-1 and 202-2 extend from one side of the main body 201 in the left-right direction, and two straps 202-3 and 202-4 extend from the other side of the main body 201 in the left-right direction. Specifically, strap 202-1 extends from the upper side of the left side of the main body 201, and strap 202-2 extends from the lower side of the left side of the main body 201. Straps 202-1 and 202-2 are connected to form a loop strap, which is worn on the user's left ear. Strap 202-3 extends from the upper side of the right side of the main body 201, and strap 202-4 extends from the lower side of the right side of the main body 201. Straps 202-3 and 202-4 are connected to form a loop strap, which is worn on the user's right ear. From the viewpoint of the wearability of the mask 2, the strap 202 is preferably made of a stretchable rope component such as a rubber rope.

[0092] The protective face shield 1-1 is a protective device positioned in front of and at a distance from the face of the user wearing the mask 2. The protective face shield 1-1 covers at least the eyes of the user's face to prevent infection through the eyes. However, as... Figure 2 As shown, the protective face shield 1-1 can also cover all or part of the user's nose and mouth, chin, left and right cheeks, forehead, ears, front of the head, sides of the head, and neck. Figure 1 As shown, the protective face shield 1-1 includes a flexible and light-transmitting membrane 101-1. It should be noted that the number of membranes 101-1 forming the protective face shield 1-1 can be one or more (for example, multiple membranes can be stacked to form the membrane 101-1 constituting the protective face shield 1-1).

[0093] Membrane 101-1 is formed, for example, from a material whose main component is a transparent plastic material. Examples of materials for membrane 101-1 include, for instance, methyl methacrylate (co)polymer, polycarbonate, styrene (co)polymer, methyl methacrylate-styrene copolymer, cellulose diacetate, cellulose triacetate, cellulose acetate butyrate, polyester, polyamide, polyimide, polyethersulfone, polysulfone, polypropylene, polymethylpentene, polyvinyl chloride, polyvinyl acetal, polyetherketone, polyurethane, and glass. However, the material of membrane 101-1 is not limited to these materials.

[0094] When using a plastic material as the film 101-1, to further improve the surface energy, coatability, slip properties, and planarity of the plastic material, a base coating (not shown) can be further applied through surface treatment. Examples of such a base coating include organoalkoxy metal compounds, polyesters, acrylic-modified polyesters, and polyurethanes. Alternatively, corona discharge treatment or UV irradiation treatment can be applied to the surface of the film 101-1 to achieve the same effects as applying a base coating.

[0095] The membrane 101-1 can be formed, for example, by stretching the aforementioned resin, or by diluting it in a solvent to form a film and then drying it. The thickness of the membrane 101-1 is preferably selected appropriately according to the application of the protective mask 1-1; for example, it can be 50 μm or more and 500 μm or less, preferably 100 μm or more and 250 μm or less. From the viewpoint of suppressing the reflection of external light and maintaining good visibility for the user, the total light transmittance of the protective mask 1-1 can be 94.0% or more, preferably 98.0% or more.

[0096] It should be noted that the materials and manufacturing methods of membranes 101-2 to 101-21 in the other embodiments described below are the same as those of membrane 101-1 described above.

[0097] A pair of slit lines 102L and 102R are formed on the left and right sides of the protective face shield 1-1, through which the straps 202 of the mask 2 can pass. However, as described later, the number of pairs of slit lines 102 and 102 can be at least one pair, or more than two pairs. In addition, in the following description, slit lines 102L and 102R are also referred to simply as slit lines 102 unless otherwise distinguished. In addition, in this specification, the slit line is a cutting line formed by cutting the membrane in a linear shape. The slit line is different from a general opening (a general elongated hole or slit with an opening width) formed through the membrane. The slit line refers to a cutting line without an opening width, rather than a slit with an opening width. That is, the membrane 101-1 on both sides of the slit line is cut off by the slit line, but they are in contact with each other without gaps.

[0098] The cut line 102 is a closed cut line that does not intersect with the outer edge of the protective mask 1-1 (i.e., the outer edge of the membrane 101-1) and is enclosed within the inner side of the protective mask 1-1 (i.e., inside the outer edge of the membrane 101-1). The cut line 102 is formed in a manner that extends in a direction intersecting the left-right direction (e.g., the up-down direction, the inclined direction, etc.).

[0099] A slit line 102L is formed on the lower left side of the membrane 101-1. Two straps 202-1 and 202-2 extending from the left side of the mask 2 pass through the slit line 102L. A slit line 102R is formed on the lower right side of the membrane 101-1. Two straps 202-3 and 202-4 extending from the right side of the mask 2 pass through the slit line 102R.

[0100] The slit line 102 has engaging portions 102a and 102b that engage with the tape 202 passing through the slit line 102, and a straight portion 102c. Engaging portions 102a and 102b are formed at both ends of the slit line 102. In this embodiment, the engaging portions 102a and 102b are serrated portions of the slit line 102. Engaging portion 102a is formed at the upper end of the slit line 102, and engaging portion 102b is formed at the lower end of the slit line 102. The straight portion 102c is the portion of the slit line 102 between engaging portions 102a and engaging portions 102b. The straight portion 102c is the portion of the slit line 102 that is straight. It should be noted that in the slit line 102 of this embodiment, the engaging portions 102a and 102b at both ends are connected by a straight portion 102c, but the present invention is not limited to this example. The connecting line connecting the engaging portions 102a and 102b does not have to be straight; for example, it can be a gently curved line.

[0101] Two straps 202-1 and 202-2 passing through the left-side cut line 102L engage with two engaging portions 102a and 102b formed at both ends of the cut line 102L, respectively. Strap 202-1 engages with engaging portion 102a of the cut line 102L, and strap 202-2 engages with engaging portion 102b of the cut line 102L. Similarly, two straps 202-3 and 202-4 passing through the right-side cut line 102R engage with two engaging portions 102a and 102b formed at both ends of the cut line 102R, respectively. Strap 202-3 engages with engaging portion 102a of the cut line 102R, and strap 202-4 engages with engaging portion 102b of the cut line 102R. In particular, from the viewpoint of stably maintaining and securing the protective face shield 1-1, it is preferable that the portion of the strap 202 closest to the main body 201 engages with the engaging portions 102a and 102b.

[0102] The tape 202 passing through the slit line 102 is clamped by the membrane 101-1 on both sides of the engaging portions 102a and 102b. In particular, the two sides of the engaging portions 102a and 102b in the membrane 101-1 have a more complex shape compared to the two sides of the straight portion 102c. Therefore, a greater frictional resistance is generated between the tape 202 passing through the slit line 102 and the engaging portions 102a and 102b, firmly clamping the tape 202 passing through the slit line 102. Thus, the movement of the tape 202 in both the direction of passing through the slit line 102 and along the direction of the slit line 102 is restricted by the engaging portions 102a and 102b. Therefore, the protective face shield 1-1 can be easily attached and detached from the mask 2 simply by passing the strap 202 through the cut line 102, and when using the protective face shield 1-1, the strap 202 can be clamped by the engaging parts 102a and 102b to stably hold and fix the protective face shield 1-1 to the mask 2.

[0103] It should be noted that, in the above description, examples of serrated engaging portions 102a and 102b were given, but as will be described later, the shape of the engaging portion is not limited to this example. As for the shape of the engaging portion, it can be any other shape as long as it can generate greater frictional resistance between the engaging portion and the tape 202 compared to the case of a straight cut line.

[0104] As described above, the protective face shield 1-1 is fitted onto the face mask 2 by passing the straps 202 of the face mask 2 through the slits 102L and 102R. Then, as... Figure 2 As shown, the user wears a mask 2 equipped with a protective face shield 1-1. When worn in this way, the protective face shield 1-1 deforms into a curved shape with a generally cylindrical surface centered on an axis in the up-down direction, covering the front and sides of the user's face while maintaining a distance from the user's face. Thus, a membrane normally made of a simple, flat shape (see reference...) Figure 1 When in use, the protective face shield 1-1, constructed from the mask 2, deforms into a shape that bends laterally along the face while supported by the mask 2 (see reference). Figure 2 ).

[0105] Next, the manufacturing method of the protective face shield 1-1 will be described. First, a film roll, which is the material for the membrane 101-1, is prepared. Then, a punching process is performed on the prepared film roll. In the punching process, the outline (i.e., the outer shape) of the protective face shield 1-1 and the cut lines 102L and 102R are punched out from the film roll. Preferably, both the outline of the protective face shield 1-1 and the cut lines 102L and 102R are formed in one punching process. As a result, the protective face shield 1-1 can be manufactured easily and quickly.

[0106] The protective face shield 1-1 of the first embodiment has been described in detail above. As described above, the protective face shield 1-1 of the first embodiment has a pair of slits 102L and 102R formed on its left and right sides, through which the straps 202 of the mask 2 can pass. Furthermore, the slits 102 have engaging portions 102a and 102b that engage with the straps 202 passing through them. In particular, the slits 102 with engaging portions 102a and 102b at both ends can correspond to the straps 202 of various types of masks 2, offering high versatility. That is, two straps 202 pass through one slit 102, and each strap 202 is held in place by the engaging portions 102a and 102b at both ends. With this configuration, the protective face shield 1-1 can be easily attached and detached from various types of masks 2, and the protective face shield 1-1 attached to the mask 2 to cover the user's face is stably maintained. Therefore, the protective face shield 1-1 can be easily combined with various types of masks for convenient use. Thus, for example, in medical settings, the convenience is enhanced by the ability to easily combine masks and the protective face shield 1-1 according to the required level of protection. Furthermore, for example, in situations where a large quantity of protective face shields with masks is needed due to a rapid spread of infectious diseases, protective face shields with masks can be prepared quickly.

[0107] Furthermore, the protective face shield 1-1 of this embodiment can be easily integrated with various commercially available protective face shields. Moreover, no special installation tools or parts are required during installation, and the assembly and disassembly of the protective face shield 1-1 and the mask 2 are simple and convenient. Additionally, by removing the protective face shield 1-1 from the mask 2, only the protective face shield 1-1 or only the mask 2 can be replaced.

[0108] Furthermore, according to the protective face shield 1-1 of the first embodiment, a gap G1 can be formed between the mask 2 and the protective face shield 1-1 (see reference). Figure 2 Therefore, the protective mask 1-1 can be prevented from becoming blurred due to the user's exhalation, maintaining good vision. Furthermore, for example, the gap G1 can be adjusted by adjusting the position of the straps 202 of the mask 2 engaging with the engaging parts 102a and 102b. Therefore, the gap G1 can be appropriately adjusted according to the size of the mask 2 and the size of the user's face. It should be noted that by adjusting the gap G1, the protective mask 1-1 can also be made to fit the user's face well.

[0109] Furthermore, according to the protective face shield 1-1 of the first embodiment, there is no need for a dedicated frame or other wearing equipment for wearing the protective face shield 1-1. Therefore, the overall weight of the protective equipment worn by the user can be reduced, which can reduce user fatigue and improve the wearing experience. In addition, it does not feel like heavy equipment and can create a good impression from the surroundings.

[0110] Furthermore, according to the protective face shield 1-1 of the first embodiment, the process of joining the protective face shield 1-1 to the mask 2 is not required (e.g., the process of bonding with adhesive or the process of welding). Therefore, the manufacturing process can be shortened and manufacturing becomes easier.

[0111] Furthermore, according to the protective face shield 1-1 of the first embodiment, the protective face shield 1-1 can be circulated independently of the mask 2. In addition, multiple flat, membrane-like protective face shields 1-1 can be packaged and transported while overlapping. Therefore, packaging and circulation are easy, and storage and handling space can be reduced.

[0112] Furthermore, according to the protective face shield 1-1 of the first embodiment, when either the protective face shield 1-1 or the mask 2 is damaged or contaminated, the damaged or contaminated component can be replaced, thereby allowing the intact component to continue to be used. Therefore, the protective face shield 1-1 and the mask 2 can be used effectively without unnecessary disposal.

[0113] In particular, in the protective face shield 1-1 of the first embodiment, two straps 202 extending from one side of the mask 2 in the left-right direction pass through a slit line 102 formed on one side of the protective face shield 1-1 in the left-right direction, which serves as a closed slit line. Furthermore, the two straps 202 engage with two engaging portions 102a and 102b formed at both ends of the slit line 102. Thus, the protective face shield 1-1 is supported at four points by a total of four straps 202. Therefore, the protective face shield 1-1 can be held and secured more stably during use.

[0114] Furthermore, the above description illustrates an example of attaching the protective face shield 1-1 to the ear-loop mask 2, but the protective face shield 1-1 can also be attached to other types of protective face shields. Figure 3 This is a plan view showing an example of attaching a protective face shield 1-1 to a drawstring face mask 3. (See diagram below.) Figure 3 As shown, the mask 3 has a main body 301 and straps 302.

[0115] The main body 301 has the same configuration as the main body 201 described above. Strap 302-1 extends from the upper side of the left side of the main body 301, and strap 302-2 extends from the lower side of the left side of the main body 301. In the drawstring mask 3, unlike the ear-loop mask 2 described above, straps 302-1 and 302-2 are separate. Strap 302-3 extends from the upper side of the right side of the main body 301, and strap 302-4 extends from the lower side of the right side of the main body 301. Straps 302-3 and 302-4 are also separate from straps 302-1 and 302-2. When using the protective face shield 1-1 and the mask 3, straps 302-1 and 302-3 are connected to each other at the upper side of the back of the user's head, and straps 302-2 and 302-4 are connected to each other at the lower side of the back of the user's head. Therefore, in the tie-on mask 3, the protective face shield 1-1 is worn by the user together with the mask 3.

[0116] Two straps 302-1 and 302-2 extending from the left side of the mask 3 pass through the cut line 102L of the face shield 1-1. Two straps 302-3 and 302-4 extending from the right side of the mask 3 pass through the cut line 102R of the face shield 1-1. Strap 302-1 engages with the engaging part 102a of the cut line 102L, and strap 302-2 engages with the engaging part 102b of the cut line 102L. Strap 302-3 engages with the engaging part 102a of the cut line 102R, and strap 302-4 engages with the engaging part 102b of the cut line 102R. Thus, for the strap-on mask 3, similar to the ear-loop mask 2, the face shield 1-1 can be easily attached and detached, and the face shield 1-1 can be stably maintained by the mask 3.

[0117] <Second Implementation Method>

[0118] Reference Figure 4 and Figure 5 The protective face shields 1-2 of the second embodiment of the present invention will be described.

[0119] Figure 4 This is a plan view showing the protective face shields 1-2. Figure 5 This is a perspective view showing the protective face shields 1-2 in use. Figure 5 The image shows an example of a protective face shield 1-2 fitted onto an ear-loop mask 2. However, like the protective face shield 1-1, the protective face shield 1-2 can be easily combined with various types of masks.

[0120] The difference between the protective mask 1-2 of the second embodiment and the protective mask 1-1 of the first embodiment is that a notch 103 is formed in the protective mask 1-2 at a position opposite to the user's respiratory organs.

[0121] like Figure 4 and Figure 5 As shown, the notch 103 is disposed in the region between the cut lines 102L and 102R in the protective face shield 1-2 (specifically, the membrane 101-2 forming the protective face shield 1-2). The notch 103 is formed such that it extends upward from the lower end of the central portion of the protective face shield 1-2. The notch 103 has a shape in which its width in the left-right direction narrows as it moves upward (e.g., approximately triangular). However, the shape of the notch 103 is not limited to this example; for example, it may also be rectangular.

[0122] like Figure 5 As shown, the notch 103 is formed at a position opposite to the user's respiratory organs (e.g., mouth and nose) during use. Therefore, the notch 103 is positioned on the outer side of the portion of the mask 2 that covers the user's respiratory organs, so that this portion of the mask 2 is not covered by the face shield 1-2 and is exposed to the outside through the notch 103. Thus, exhaled air from the user's respiratory organs, after passing through or around the mask 2, is discharged to the outside of the face shield 1-2 through the notch 103. This effectively prevents the face shield 1-2 from becoming blurred by the user's exhaled air, maintaining good visibility.

[0123] <Third Implementation Method>

[0124] Reference Figure 6 The protective face shields 1-3 of the third embodiment of the present invention will be described.

[0125] Figure 6 This is a plan view showing the protective face shields 1-3.

[0126] The difference between the protective mask 1-1 of the first embodiment and the protective mask 1-3 of the third embodiment is that a through hole 104 is formed in the protective mask 1-3 at a position opposite to the user's respiratory organs. The protective mask 1-3 of the third embodiment is equivalent to an example in which the part through which exhalation passes in the protective mask 1-3 is changed from the notch 103 of the protective mask 1-2 of the second embodiment to the through hole 104.

[0127] like Figure 6 As shown, a plurality of through holes 104 are formed in the region between the cut lines 102L and 102R in the protective face shield 1-3 (specifically, the membrane 101-3 forming the protective face shield 1-3). The through holes 104 may be circular, for example, but are not limited to this example; they may also be elliptical or polygonal. Furthermore, the arrangement of the through holes 104 is not limited to... Figure 6The example shown illustrates this. For instance, the through holes 104 can be arranged at equal intervals or at non-uniform intervals. Alternatively, they can be arranged around the location opposite the respiratory organ (e.g., to the side or below the location opposite the respiratory organ). Furthermore, the number of through holes 104 is not limited to... Figure 6 The example shown could also be a single one.

[0128] The through-hole 104 is positioned opposite the user's respiratory organs (e.g., mouth and nose) or on its surrounding side or lower side during use, functioning as a ventilation opening. Therefore, exhaled air from the user's respiratory organs, after passing through or around the mask 2, is exhausted to the outside of the protective face shield 1-3 through the through-hole 104. This effectively prevents the protective face shield 1-3 from becoming blurred by the user's exhalation, maintaining good visibility. Furthermore, the through-hole 104 also makes it easier for the other party to hear the user's voice during conversations.

[0129] <Fourth Implementation Method>

[0130] Reference Figure 7 and Figure 8 The protective face shields 1-4 of the fourth embodiment of the present invention will be described.

[0131] Figure 7 This is a plan view showing the protective face shields 1-4. Figure 8 This is a perspective view showing the protective face shields 1-4 in use. Figure 8 The image shows an example of attaching protective face shields 1-4 to ear-loop masks 2. However, like protective face shields 1-1, protective face shields 1-4 can be easily combined with various types of masks.

[0132] The protective face shield 1-4 of the fourth embodiment differs from the protective face shield 1-1 of the first embodiment in that a bending portion 105 is formed in the protective face shield 1-4 at a position opposite to the user's nose or at a position opposite to a portion lower than the nose, which can be bent toward the user's face.

[0133] like Figure 7As shown, a cut line 106 for forming a bend 105 is formed in the area between cut lines 102L and 102R in the protective face shield 1-4 (specifically, the membrane 101-4 forming the protective face shield 1-4). Cut line 106 has a U-shape. Cut line 106 has straight portions 106a, 106b, and 106c. Straight portions 106a and 106b are straight sections extending in the vertical direction of cut line 106. Straight portions 106a and 106b are spaced apart from each other in the horizontal direction and are arranged parallel to each other. Straight portion 106c is a straight section extending in the horizontal direction of cut line 106. Straight portion 106c is formed to connect the upper end of straight portion 106a to the upper end of straight portion 106b. However, the shape of cut line 106 is not limited to this example; for example, it could be an arc shape. Alternatively, it could be a configuration rotated 90 degrees compared to this example, or it could be configured with multiple bends. Furthermore, it could be a structure in which multiple cut lines are arranged side-by-side and bent in multiple stages.

[0134] The bending portion 105 is a deformable part of the protective face shield 1-4 that is partially cut along the cut line 106. The bending portion 105 can be bent along the bending line L1 formed in a manner that connects the lower ends of the straight portion 106a and the lower ends of the straight portion 106b. To facilitate bending of the bending portion 105, toothed holes may be provided on the bending line L1.

[0135] like Figure 8 As shown, when using the protective face shield 1-4, the folded portion 105 is folded towards the user's face along the fold line L1. Therefore, the folded portion 105 abuts against the portion of the mask 2 that covers the user's nose or is located below the nose. Thus, the protective face shield 1-4 is supported not only by the engaging portions 102a and 102b of the slit line 102 that engage with the straps 202 of the mask 2, but also by the folded portion 105. Therefore, when the protective face shield 1-4 covers the user's face, it can be held and secured more stably.

[0136] Furthermore, the bend 105 reliably ensures a gap corresponding to the protruding length of the bend 105 between the protective mask 1-4 and the user's face. Therefore, the ventilation between the protective mask 1-4 and the user's face is improved, thus preventing smudging of the protective mask 1-4, alleviating breathing difficulties for the user, and improving the wearability of the protective mask 1-4.

[0137] <Fifth Implementation Method>

[0138] Reference Figure 9 and Figure 10 The protective face shields 1-5 of the fifth embodiment of the present invention will be described.

[0139] Figure 9 This is a plan view showing the protective face shields 1-5. Figure 10 This is a perspective view showing the protective face shields 1-5 in use. Figure 10 The image shows an example of protective face shields 1-5 fitted onto ear-loop masks 2. However, like protective face shields 1-1, protective face shields 1-5 can be easily combined with various types of masks.

[0140] The protective face shield 1-5 of the fifth embodiment differs from the protective face shield 1-1 of the first embodiment in that a bending portion 107 capable of bending toward the user's face is formed at a position opposite to the user's forehead or front of the head in the protective face shield 1-5.

[0141] like Figure 9 As shown, a cutout 108 for forming a bend 107 is formed on the upper part of the protective mask 1-5 (specifically, the membrane 101-5 forming the protective mask 1-5). The cutout 108 has a pair of left and right cut lines 108a and 108b. Each cut line 108a and 108b is an open-type cut line with one end intersecting the outer edge of the protective mask 1-5 (i.e., the outer edge of the membrane 101-5) and the other end positioned on the inner side of the protective mask 1-5 (i.e., further inward than the outer edge of the membrane 101-5). Cut line 108a is formed on the upper left side of the protective mask 1-5. Cut line 108a slopes to the right as it moves downward and has a straight shape. Cut line 108b is formed on the upper right side of the protective mask 1-5. Cut line 108b slopes to the left as it moves downward and has a straight shape. However, the shape of the cut lines 108a and 108b is not limited to this example; for example, they can also be arc-shaped. Alternatively, it can be configured as a structure without cut lines 108a and 108b, where only the upper part of the protective face shield 1-5 is bent as a whole.

[0142] The bending portion 107 is a deformable part of the protective face shield 1-5 that is partially cut along the cut lines 108a and 108b. The bending portion 107 can be bent along the bending line L2, which is formed by connecting the lower ends of the cut lines 108a and 108b. To facilitate bending of the bending portion 107, toothed holes may be provided on the bending line L2. In addition, the portion that is laterally located beyond the cut lines 108a and 108b and higher than the bending line L2 is also deformable like the bending portion 107 and can be bent towards the face.

[0143] like Figure 10As shown, when using the protective face shield 1-5, the bending portion 107 is bent towards the user's face along the bending line L2. Therefore, the bending portion 107 abuts against the user's forehead or the front of their head. Thus, the protective face shield 1-5 is supported not only by the engaging portions 102a and 102b of the slit line 102 that engage with the strap 202 of the mask 2, but also by the bending portion 107. Therefore, when the protective face shield 1-5 covers the user's face, it can be held and secured more stably.

[0144] Furthermore, the bending portion 107 can be used to prevent foreign objects from entering the gap between the protective mask 1-5 and the user's face from above.

[0145] In the protective face shields 1-5, a bent portion 107 is provided at a position opposite to the user's forehead or front of the head. Similarly, a bent portion (a portion that can be bent toward the user's face) can also be provided at a position opposite to the user's chin or at a position below the chin. This also prevents foreign objects from entering the gap between the protective face shields 1-5 and the user's face from below.

[0146] <Sixth Implementation Method>

[0147] Reference Figure 11 and Figure 12 The protective face shields 1-6 of the sixth embodiment of the present invention will be described.

[0148] Figure 11 This is a plan view showing the protective face shields 1-6. Figure 12 This is a perspective view showing the protective face shields 1-6 in use. Figure 12 The image shows an example of attaching protective face shields 1-6 to ear-loop masks 2. However, like protective face shields 1-1, protective face shields 1-6 can be easily combined with various types of masks.

[0149] The protective face shield 1-6 of the sixth embodiment differs from the protective face shield 1-1 of the first embodiment in that bending lines L3 and L4 are arranged between the front part P1 and the side parts P2 and P3 of the user's face in the protective face shield 1-6.

[0150] like Figure 11As shown, the central portion between the cut lines 102L and 102R in the protective face shield 1-6 (specifically, the membrane 101-6 forming the protective face shield 1-6) is the front-side portion P1 (hereinafter referred to as "front portion P1"). The left side portion formed by the cut line 102L in the protective face shield 1-6 (specifically, the membrane 101-6 forming the protective face shield 1-6) is the left-side portion P2 (hereinafter referred to as "left-side portion P2"). The right side portion formed by the cut line 102R in the protective face shield 1-6 (specifically, the membrane 101-6 forming the protective face shield 1-6) is the right-side portion P3 (hereinafter referred to as "right-side portion P3").

[0151] A bending line L3 is formed between the front portion P1 and the left side portion P2. A bending line L4 is formed between the front portion P1 and the right side portion P3. Bending lines L3 and L4 are formed in a vertically extending manner. The left side portion P2 can be bent relative to the front portion P1 along bending line L3. The right side portion P3 can be bent relative to the front portion P1 along bending line L4. To facilitate bending of the left side portion P2 and the right side portion P3, toothed holes may be provided on bending lines L3 and L4.

[0152] like Figure 12 As shown, when using the protective face shield 1-6, the left side portion P2 and the right side portion P3 are bent towards the user's face along bending lines L3 and L4. Therefore, the front portion P1 of the protective face shield 1-6 faces the user's face while maintaining a flat shape. Thus, when the front portion P1 of the protective face shield 1-6 is flat, compared to when the front portion P1 is curved, it is possible to suppress the entry of external light, thereby maintaining good visibility.

[0153] <Seventh Implementation Method>

[0154] Reference Figures 13-16 The protective face shields 1-7 of the seventh embodiment of the present invention will be described.

[0155] Figure 13 This is a plan view showing the protective face shields 1-7. Figure 14 This is a partially enlarged cross-sectional view showing the protective face shields 1-7. Specifically, Figure 14 This shows the field of vision area P4 of the protective face shields 1-7 (refer to...). Figure 13 A sectional view of a section orthogonal to the surface of the protective face shield 1-7 in the diagram.

[0156] The seventh embodiment of the protective face shield 1-7 differs from the first embodiment of the protective face shield 1-1 in that it is provided with an anti-reflective layer 109 (see reference). Figure 14 ).

[0157] The anti-reflective layer 109 may be partially disposed only in the protective mask 1-7 (specifically, the membrane 101-7 forming the protective mask 1-7), for example, in the field of view region P4 (see reference). Figure 13 The field of vision area P4 is the area within the membrane 101-7 that primarily enters the user's field of vision when using the protective face shield 1-7, for example, the area within the protective face shield 1-7 above the cut lines 102L and 102R. However, the area within the protective face shield 1-7 where the anti-reflective layer 109 is provided is not particularly limited; for example, the anti-reflective layer 109 may be provided over the entire area of ​​the protective face shield 1-7. Furthermore, from the viewpoint of improving the anti-reflective effect, the anti-reflective layer 109 is preferably provided on both the front and back sides of the protective face shield 1-7 (specifically, the membrane 101-7 forming the protective face shield 1-7). However, the anti-reflective layer 109 may be provided on at least one side of the protective face shield 1-7, or even only on a single side of the protective face shield 1-7.

[0158] like Figure 14 As shown, an anti-reflective layer 109 is provided on both sides of the film 101-7, separated by a base layer 110. The base layer 110 is provided to improve the adhesion of the anti-reflective layer 109 to the film 101-7. The base layer 110 is, for example, an optical layer integrally formed with the anti-reflective layer 109, and is transparent, formed by curing a resin composition or the same energy-curable resin composition as the anti-reflective layer 109. Alternatively, the anti-reflective layer 109 may be formed directly on the surface of the film 101-7 without passing through the base layer 110. The anti-reflective layer 109 is provided to suppress the reflection of external light and improve the total light transmittance of the protective mask 1-7. Furthermore, as described above, from the viewpoint of maintaining good visibility for the user, the total light transmittance of the protective mask 1-7 can be 94.0% or more, preferably 98.0% or more.

[0159] The antireflective layer 109 is, for example, composed of tiny uneven structures with a spacing below the wavelength of visible light. The unevenness (protrusions and recesses) of the tiny uneven structures are periodically formed on the surface of the film 101-7 in the longitudinal and transverse directions. The average period (average spacing) of the unevenness of the tiny uneven structures is below the wavelength of visible light. The wavelength range of visible light is 360 nm to 830 nm, and in this embodiment, the unevenness of the tiny uneven structures is regularly arranged with dimensions below the wavelength range of visible light. From this viewpoint, the average period (average spacing) of the unevenness is 350 nm or less. For example, the average period of the unevenness is preferably 100 nm or more and 350 nm or less, more preferably 120 nm or more and 280 nm or less, and even more preferably 130 to 270 nm. Therefore, the tiny uneven structure becomes a so-called moth-eye structure, which has an antireflective function. Here, if the average period is less than 100 nm, it may be difficult to form the tiny uneven structure, and therefore it is not preferred. In addition, when the average period exceeds 350nm, there is a possibility that the intensity of the diffracted light may increase, and there is a possibility that external light may be diffracted on the surface with a tiny uneven structure, which may reduce the anti-reflection effect.

[0160] It should be noted that the average height of the micro-uneven structure is not particularly limited, but is preferably 100 nm or more and 300 nm or less, more preferably 130 nm or more and 300 nm or less, and even more preferably 150 nm or more and 230 nm or less. The average height of the micro-uneven structure is the arithmetic mean of the heights of the multiple protrusions constituting the micro-uneven structure. For example, the heights of the protrusions of some micro-uneven structures can be measured, and their arithmetic mean can be used as the average height of the micro-uneven structure. In addition, the protrusions of the micro-uneven structure extend in a direction perpendicular to the surface of the film 101-7. Furthermore, the protrusions of the micro-uneven structure can be various shapes, such as conical, columnar, or needle-like.

[0161] In the case of manufacturing a micro-uneven structure, as described later, a roller-type master exposure device with a pattern corresponding to the moth-eye structure is used to transfer the uneven pattern onto a transfer material such as an energy-curable resin composition coated on the substrate of film 101-7, and then the transfer material is cured.

[0162] Here, the cured transfer material may be hydrophilic. The transfer material preferably contains one or more hydrophilic functional groups. Examples of such hydrophilic functional groups include hydroxyl, carboxyl, and carbonyl groups.

[0163] Furthermore, the energy-curable resin product can have different physical properties on both sides of the substrate of the film 101-7. For example, by using water-repellent and hydrophilic properties differently according to the application of the protective mask 1-7, specific sides can be made to have functions such as anti-fogging.

[0164] As an energy-curable resin composition, an ultraviolet-curable resin composition is preferred, for example. Furthermore, the energy-curable resin composition may contain fillers, functional additives, etc., as needed. The ultraviolet-curable resin composition may, for example, contain acrylates and an initiator. Moreover, the ultraviolet-curable resin composition may contain, for example, monofunctional monomers, difunctional monomers, polyfunctional monomers, etc.

[0165] As described above, in the protective face shields 1-7 of the seventh embodiment, an anti-reflective layer 109 is provided on at least one surface of the film 101-7. Therefore, when using the protective face shields 1-7, the entry of external light can be suppressed, thus maintaining a good field of vision.

[0166] As the anti-reflective layer 109, an anti-reflective coating (such as an AR coating) can also be used, but a moth-eye structure consisting of tiny bumps and depressions, as described above, is preferred (see reference). Figure 14 In particular, the anti-reflective layer 109 is preferably composed of a hydrophilic resin with a micro-uneven structure having an average period below the wavelength of visible light. This provides high anti-reflective performance and adds anti-fogging properties. By using a moth-eye structure composed of micro-uneven structures, the anti-reflective performance of the protective masks 1-7 can be improved, achieving a total light transmittance of, for example, 98.0% or higher. However, even when using other anti-reflective methods such as wet or dry AR coatings, a total light transmittance of, for example, 94.0% or higher can be obtained. It should be noted that AR coating is a technique that reduces reflected light by causing light interference through the formation of a thin film on the substrate surface. Examples of wet AR coatings include spin coating, dip coating, and gravure coating. Examples of dry AR coatings include coatings using vacuum evaporation, sputtering, etc.

[0167] Here, refer to Figure 15 and Figure 16 The relationship between the surface treatment conditions of the membrane and its transmittance characteristics is explained.

[0168] Figure 15 This is a table showing various conditions for membrane surface treatment. In Figure 15 The optical properties of the surface treatment under conditions 1 through 5 are shown in the diagram. In condition 1, a moth-eye structure composed of minute irregularities is formed on both sides of the film. In condition 2, wet AR coating is applied to both sides of the film. In condition 3, wet AR coating is applied to only one side of the film. In conditions 4 and 5, no antireflective layer is applied to the film. Figure 15In the diagram, each column corresponds to the optical properties under various conditions, showing, from left to right, the material thickness (mm), total light transmittance (%), and reflectance (%). It should be noted that the film substrate is polyethylene terephthalate. Furthermore, the total light transmittance was measured using a haze meter HM-150 manufactured by Murakami Color Technology Research Institute, based on JIS K7361.

[0169] In condition 1, the material thickness is 0.129 mm, the total light transmittance is 98.3%, and the reflectance is 0.8%.

[0170] In condition 2, the material thickness is 0.125 mm, the total light transmittance is 97.6%, and the reflectance is 2.2%.

[0171] In condition 3, the material thickness is 0.115 mm, the total light transmittance is 94.7%, and the reflectance is 4.7%.

[0172] In condition 4, the material thickness is 0.101 mm, the total light transmittance is 88.2%, and the reflectance is 11.5%.

[0173] In condition 5, the material thickness is 0.099 mm, the total light transmittance is 90.6%, and the reflectance is 8.4%.

[0174] Figure 16 This is a graph showing the transmittance characteristics of the membrane under various surface treatment conditions. Figure 16 In China, regarding Figure 15 Conditions 1 through 5 shown represent the transmittance characteristics for light of each wavelength. Figure 16 Lines C1, C2, C3, C4, and C5 in the diagram represent the transmittance characteristics under conditions 1, 2, 3, 4, and 5, respectively. According to... Figure 16 It can be seen that in conditions 2 and 3, where a wet AR coating is used, the transmittance at each wavelength is increased compared to conditions 4 and 5, where no antireflective layer is applied. Furthermore, it can be seen that in condition 1, where a moth-eye structure composed of tiny irregularities is used, the transmittance at each wavelength is further increased compared to conditions 2 and 3, where a wet AR coating is used.

[0175] Furthermore, by forming an anti-reflective layer 109 consisting of a micro-uneven structure on both sides of the substrate of the film 101-7, superior anti-reflective performance can be achieved.

[0176] Furthermore, although not illustrated, the protective face shields 1-7 of this embodiment can also be made of a film laminate formed by peelably stacking multiple transparent films with anti-reflective layers 109 formed on two or one side via an adhesive layer. By using such a film laminate formed by peelably stacking multiple films, even if there is no spare time to wipe away contaminants, or if the contaminants are inherently hazardous and should not be touched, the contaminated films can be peeled off one by one, thus restoring vision immediately without contact with hazardous materials. It should be noted that the aforementioned multiple transparent films can be stacked only on the portion opposite the eyes.

[0177] Next, the manufacturing method of the protective mask 1-7 having an anti-reflective layer 109 composed of tiny irregular structures on the surface of the membrane 101-7 will be described.

[0178] In manufacturing protective face shields 1-7, firstly, a micro-unraveling structure (moth-eye structure) is formed on the surface of the film roll, which is the material of film 101-7, using an energy-curable resin composition such as an ultraviolet-curable resin. Then, a roller-type master exposure apparatus with an embossed pattern corresponding to the micro-unraveling structure is used to transfer the embossed pattern onto the surface of film 101-7, thereby forming the micro-unraveling structure. Afterwards, the outline of the protective face shields 1-7 and the shape of the cut lines 102L and 102R are formed. The following describes each step of this manufacturing method.

[0179] [Preparation for the original version]

[0180] First, a micro-embossing template with an inverted shape, having a micro-unraveling structure of an anti-reflective layer 109, is prepared. The micro-embossing template is a template used in nanoimprint lithography; for example, it can be a cylindrical or cylindrical roller template, or a template of other shapes (e.g., flat). When using a roller template, the micro-unraveling structure of the micro-embossing template can be seamlessly transferred to the substrate of film 101-7 via a roller-to-roll method. The cylindrical or cylindrical surface of the roller template becomes the forming surface for forming the micro-unraveling structure on the surface of the substrate of film 101-7. On this forming surface, a predetermined micro-unraveling structure is arranged in two dimensions, for example, by dry etching, wet etching, etc. Glass can be used as the material for the roller template, but it is not particularly limited to this material. The micro-unraveling structure disposed on the forming surface of the roller template is in an inverted anti-unraveling relationship with the micro-unraveling structure (moth-eye structure) formed on the surface of the substrate of film 101-7.

[0181] [Transfer Printing Process]

[0182] Next, an uncured resin is coated onto the surface of the substrate of film 101-7 to form an uncured resin layer (transfer material layer). The uncured resin layer is composed of an uncured curable resin such as an ultraviolet-curable resin. Then, for example, a roller-type template is brought into close contact with the uncured resin layer of film 101-7 using a roller-to-roll method. Subsequently, energy rays such as ultraviolet light are irradiated onto the uncured resin layer from an energy ray source to cure the uncured resin. It should be noted that the energy ray source is not particularly limited to any energy ray source capable of emitting electron beams, ultraviolet light, infrared light, laser light, visible light, ionizing radiation (X-rays, alpha rays, beta rays, gamma rays, etc.), microwaves, or high-frequency waves.

[0183] Then, the substrate, which is integral with the cured but uncured resin, is peeled off from the roller stencil. As a result, the micro-uneven structure of the roller stencil is transferred to the surface of the substrate of film 101-7, forming a micro-uneven structure (moth-eye structure) as an anti-reflective layer 109 on the surface of the substrate of film 101-7. This micro-uneven structure on the surface of the substrate of film 101-7 is the reverse shape of the micro-uneven structure of the roller stencil.

[0184] It should be noted that when the anti-reflective layer 109, which consists of a micro-uneven structure, is formed on both sides of the substrate of film 101-7, the micro-uneven structure can also be transferred onto the surface of the other side of the substrate, similar to the above. Alternatively, a protective film can be attached to the surface of film 101-7 obtained in the above transfer process. This prevents damage to the micro-uneven structure of film 101-7 during subsequent processes, transport, etc.

[0185] [Molding and processing steps for protective face shields]

[0186] The protective face shield 1-7 is formed by cutting the film 101-7 obtained in the above process into a specified shape and performing the processing to form the above-mentioned slit line 102. The forming process for forming the slit line 102 and cutting into the specified shape can be performed using a numerically controlled cutting machine, a laser processing device, a punching and stamping device, etc. If punching and stamping is used, the forming process of the slit line 102 and the cutting process of the specified shape can be performed in one process, which is therefore preferred.

[0187] <Eighth Implementation Method>

[0188] Reference Figure 17 The protective face shields 1-8 of the eighth embodiment of the present invention will be described.

[0189] Figure 17 This is a plan view showing the protective face shields 1-8.

[0190] The protective face shield 1-8 of the eighth embodiment differs from the protective face shield 1-1 of the first embodiment in that it has a through hole 111 through which hooks for cleaning and drying are passed.

[0191] like Figure 17 As shown, a through-hole 111 is formed near the outer edge of the protective mask 1-8 (specifically, the membrane 101-8 forming the protective mask 1-8). The through-hole 111 is located at the upper right end of the protective mask 1-8. The through-hole 111 has a circular shape. However, the shape of the through-hole 111 is not limited to this example; for example, it can also be elliptical or polygonal. Alternatively, an arc-shaped cut line can be formed on the protective mask 1-8 instead of the through-hole 111, and the through portion formed by bending the portion partially cut by the cut line can function as a part through which a hook for cleaning and drying passes. Furthermore, a hook-shaped notch can be provided on the outer edge of the protective mask 1-8, which functions as a part through which a hook for cleaning and drying passes. In addition, the arrangement of the through-hole 111 is not limited to... Figure 17 The example shown. For example, the through hole 111 can be configured at the upper left end or at the center of the upper end.

[0192] During the cleaning and drying of protective masks 1-8, hooks pass through the through holes 111. For example, protective masks 1-8 are cleaned by immersing them in cleaning solution while suspended on the hooks. Additionally, protective masks 1-8 are dried while suspended on the hooks. Thus, contaminated protective masks 1-8 can be cleaned and dried, and reused.

[0193] <Ninth Implementation Method>

[0194] Reference Figure 18 The protective face shields 1-9 of the ninth embodiment of the present invention will be described.

[0195] Figure 18 This is a plan view showing the protective face shields 1-9.

[0196] The difference between the protective face shield 1-9 of the ninth embodiment and the protective face shield 1-1 of the first embodiment is that the protective face shield 1-9 is marked so that it is easy to spot.

[0197] For example, the above markings are formed in the upper region P5 of the protective face shields 1-9 (see reference). Figure 18The markings formed in the upper region P5 may include, for example, the manufacturer's name or a pattern that reflects light. However, the markings formed on the protective masks 1-9 are not limited to this example; they may also be various words, graphics, or symbols, or combinations thereof. Furthermore, the location of the markings on the protective masks 1-9 may be outside the upper region P5, for example, on the left or right side. The markings can be visually recognizable, and the method of formation is not limited. The markings may be formed by cut lines, or by creating minute irregularities on the surface of the protective masks 1-9 to cause light reflection, diffraction, or interference. Additionally, the markings may be formed by slits with openings, or by ink, stamps, etc.

[0198] As described above, the protective face shields 1-9 are made of a thin, transparent film with high transparency. Therefore, for example, it may be difficult to visually identify the protective face shields 1-9 when placed on a table, etc. Furthermore, for example, it may be possible to go unnoticed even if the protective face shields 1-9 are worn in an incorrect position. Therefore, by forming markings on the protective face shields 1-9, they can be easily visually identified, making operation convenient, and maintaining infection protection by wearing them in the correct position.

[0199] <Tenth Implementation Method>

[0200] Reference Figure 19 and Figure 20 The protective face shields 1-10 of the tenth embodiment of the present invention will be described.

[0201] Figure 19 This is a plan view showing the protective face shields 1-10. Figure 20 This is a perspective view showing the protective face shields 1-10 in use. Figure 20 An example of attaching protective face shield 1-10 to ear loop mask 2 is shown. However, like protective face shield 1-1, protective face shield 1-10 can be easily combined with various types of masks.

[0202] The protective face shield 1-10 of the tenth embodiment differs from the protective face shield 1-1 of the first embodiment in that it has an assembly structure 112 that can be assembled into a shape that tapers at the front end as it moves away from the user's face.

[0203] like Figure 19 As shown, the protective face shield 1-10 (specifically, the membrane 101-10 forming the protective face shield 1-10) has: a portion P6 that is the front side of the user's face and opposite to the eyes, a portion P7 that is the left side of the user's face, a portion P8 that is the right side of the user's face, and a portion P9 that is the front side of the user's face and opposite to the respiratory organs.

[0204] exist Figure 19 In the plan view shown, part P6 is the upper part of the protective mask 1-10, having a fan-shaped shape with its center positioned at the bottom. Part P7 is the left side of the protective mask 1-10, formed extending from part P6 in a downward left direction. A cut line 102L is formed in part P7. Part P8 is the right side of the protective mask 1-10, formed extending from part P6 in a downward right direction. A cut line 102R is formed in part P8. Part P9 is the lower part of the protective mask 1-10, formed between parts P7 and P8, extending downward from part P6. Part P9 is spaced apart from parts P7 and P8 in the left-right direction, respectively.

[0205] The assembly structure 112 includes a cut line 112a formed in part P7, a cut line 112b formed in part P8, protrusions 112c and 112d formed in part P9, and cut lines 112e and 112f. Cut lines 112a, 112b, 112e, and 112f are open-type cut lines with one end intersecting the outer edge of the protective mask 1-10 (i.e., the outer edge of the membrane 101-10) and the other end disposed on the inner side of the protective mask 1-10 (i.e., inside the outer edge of the membrane 101-10).

[0206] Cut line 112a intersects the lower left outer edge of portion P7, forming on the P9 side of portion P7, and extends to the upper right. Cut line 112b intersects the lower right outer edge of portion P8, forming on the P9 side of portion P8, and extends to the upper left. Protrusion 112c extends to the left from the lower end of portion P9. Cut line 112e intersects the upper portion of the outer edge of protrusion 112c and extends downward. Protrusion 112d extends to the right from the lower end of portion P9. Cut line 112f intersects the upper portion of the outer edge of protrusion 112d and extends downward.

[0207] like Figure 20As shown, when the protective face shield 1-10 is assembled using the assembly structure 112, with the cut line 112a of part P7 and the cut line 112e of part P9 coaxial, the protruding portion 112c of part P9 is clamped by the cut line 112a of part P7. Furthermore, with the cut line 112b of part P8 and the cut line 112f of part P9 coaxial, the protruding portion 112d of part P9 is clamped by the cut line 112b of part P8. Thus, the protective face shield 1-10 is assembled into a three-dimensional shape that tapers at the front end as it moves away from the user's face. However, the assembly structure 112 is not particularly limited to the above example, as long as it can assemble the protective face shield into a shape that tapers at the front end as it moves away from the user's face. For example, various structures such as the assembly structure 132 of the eighteenth embodiment described later can be used.

[0208] exist Figure 2 In the protective face shield 1-1 of the first embodiment shown, the membrane 101-1 has a three-dimensional shape that is simply curved in the left-right direction. In contrast, in... Figure 20 In the protective face shield 1-10 of the tenth embodiment shown, the membrane 101-10 is assembled into a three-dimensional shape that tapers at the front end as it moves away from the user's face. The four parts P6, P7, P8, and P9 of the membrane 101-10 are assembled using the assembly structure 112 with their surfaces facing different directions, thereby achieving the three-dimensional shape that tapers at the front end.

[0209] When in use, part P6 of the protective face shield 1-10 comes into contact with the user's forehead. Therefore, in addition to being supported by the engaging portions 102a and 102b of the slit line 102 that engage with the strap 202 of the mask 2, the protective face shield 1-10 is also partially supported by P6. Thus, the protective face shield 1-10 can be held and secured more stably during use.

[0210] Furthermore, P6 can be used to prevent foreign objects from entering between the protective mask 1-10 and the user's face from above.

[0211] Furthermore, by placing portion P6 of the protective face shield 1-10 against the user's forehead, light from above will not penetrate between the protective face shield 1-10 and the user's face, thus suppressing the reflection of light from above towards the user's side due to the protective face shield 1-10. Therefore, good vision can be maintained.

[0212] Furthermore, in the protective face shield 1-10, for example, compared with the protective face shield 1-1 of the first embodiment, the center of gravity is closer to the user side, so the protective face shield 1-10 can be held and fixed more stably during use.

[0213] In the tenth embodiment, by using the assembly structure 112 to join part P7 with part P9, and part P8 with part P9, a product is manufactured. Figure 20 The solid shape shown. On the other hand, since there are many different planar shapes when a solid shape is unfolded, even... Figure 19 Other planar shapes not shown in the diagram can also be used to create the same three-dimensional shapes. For example, Figure 20 The three-dimensional shape shown can also be made by arranging an assembly structure near the portion between part P6 and part P7 and between part P6 and part P8, instead of using the assembly structure 112 arranged near the isolation portion between part P7 and part P9 and between part P8 and part P9.

[0214] Furthermore, in the tenth embodiment, the isolation portion between part P7 and part P9, and the isolation portion between part P8 and part P9, disappear without gap due to the assembly structure 112, but by setting a shape such that gaps remain after assembly, it can also function as a through hole as in the third embodiment.

[0215] In addition, in the tenth embodiment, by having part P6 of the protective mask 1-10 abut against the user's forehead, it becomes a structure that uses part P6 to suppress foreign objects from entering between the protective mask 1-10 and the user's face from above. However, it can also be configured to suppress foreign objects from entering from below by reversing the top and bottom.

[0216] <Eleventh Implementation Method>

[0217] Reference Figure 21 The protective face shields 1-11 of the eleventh embodiment of the present invention will be described.

[0218] Figure 21 This is a plan view showing the protective face shields 1-11.

[0219] The protective mask 1-11 of the eleventh embodiment differs from the protective mask 1-1 of the first embodiment in that multiple pairs of cut lines 102 are formed on the left and right sides of the protective mask 1-11.

[0220] like Figure 21As shown, three pairs of slit lines 102 (slit lines 102-1L, 102-1R, 102-2L, 102-2R, and 102-3L, 102-3R) are formed on the left and right sides of the protective face shield 1-11 (specifically, the membrane 101-11 forming the protective face shield 1-11). Slit lines 102-1L and 102-1R constitute the first pair. Slit lines 102-2L and 102-2R constitute the second pair. Slit lines 102-3L and 102-3R constitute the third pair. However, the number of pairs of slit lines 102 can also be two or four or more. Furthermore, the engaging portions 102a and 102b can be as follows... Figure 21 The serrated shape shown can be replaced with the branching shape described later (see reference). Figure 23 (The engaging parts 113a, 113b), the curved shape (refer to) Figure 24 The engaging parts 114a, 114b) or the variable parts (see variable part 116, etc. in Figure 247). In addition, the shape of the engaging parts may be different for each pair.

[0221] Cut lines 102-1L, 102-2L, and 102-3L are formed on the lower left side of membrane 101-11. Cut lines 102-1L, 102-2L, and 102-3L are arranged sequentially from left to right. Cut lines 102-1R, 102-2R, and 102-3R are formed on the lower right side of membrane 101-11. Cut lines 102-1R, 102-2R, and 102-3R are arranged sequentially from right to left. Therefore, the spacing between pairs of cut lines 102 varies for each pair. Specifically, the spacing between cut lines 102-1L and 102-1R, which constitute the first pair, is the widest. The spacing between cut lines 102-2L and 102-2R, which constitute the second pair, is the second widest. The interval between the incision lines 102-3L and 102-3R, which form the third pair, is the narrowest.

[0222] As described above, in the protective face shield 1-11 of the eleventh embodiment, multiple pairs of slits 102 are formed. Thus, by selecting the pair of slits 102 to use according to the user's face and the size of the mask, the gap between the protective face shield 1-11 and the mask 2 can be adjusted, or the protective face shield 1-11 can be made to fit the user's face well.

[0223] For example, users with large faces can maintain the gap between the protective mask 1-11 and the face mask 2 by using the cut lines 102-1L and 102-1R that constitute the first pair, so that the protective mask 1-11 fits the face well. In this case, two straps 202-1 and 202-2 extending from the left side of the face mask 2 pass through the cut line 102-1L, and two straps 202-3 and 202-4 extending from the right side of the face mask 2 pass through the cut line 102-1R.

[0224] Additionally, for example, users with small faces can maintain the gap between the protective face shield 1-11 and the mask 2 by using the cut lines 102-3L and 102-3R that constitute the third pair, ensuring that the protective face shield 1-11 fits the face well. In this case, two straps 202-1 and 202-2 extending from the left side of the mask 2 pass through the cut line 102-3L, and two straps 202-3 and 202-4 extending from the right side of the mask 2 pass through the cut line 102-3R.

[0225] <Twelfth Implementation Method>

[0226] Reference Figure 22 The protective face shields 1-12 of the twelfth embodiment of the present invention will be described.

[0227] Figure 22 This is a plan view showing the protective face shields 1-12.

[0228] The difference between the protective face shield 1-12 of the twelfth embodiment and the protective face shield 1-10 of the tenth embodiment is that multiple pairs of cut lines 102 are formed on the left and right sides of the protective face shield 1-12.

[0229] like Figure 22 As shown, three pairs of cut lines 102 (cut lines 102-4L, 102-4R, 102-5L, 102-5R, and 102-6L, 102-6R) are formed on the left and right sides of the protective face shield 1-12 (specifically, the membrane 101-12 forming the protective face shield 1-12). Cut lines 102-4L and 102-4R form the first pair. Cut lines 102-5L and 102-5R form the second pair. Cut lines 102-6L and 102-6R form the third pair. However, the number of pairs of cut lines 102 can also be two or four or more.

[0230] Cut lines 102-4L, 102-5L, and 102-6L are formed on the left side of membrane 101-12, i.e., portion P7. Cut lines 102-4L, 102-5L, and 102-6L are arranged sequentially from left to right. Cut lines 102-4R, 102-5R, and 102-6R are formed on the right side of membrane 101-12, i.e., portion P8. Cut lines 102-4R, 102-5R, and 102-6R are arranged sequentially from right to left. Therefore, the spacing between pairs of cut lines 102 varies for each pair. Specifically, the spacing between cut lines 102-4L and 102-4R, which constitute the first pair, is the widest. The spacing between cut lines 102-5L and 102-5R, which constitute the second pair, is the second widest. The interval between the incision lines 102-6L and 102-6R, which form the third pair, is the narrowest.

[0231] As described above, in the protective face shield 1-12 of the twelfth embodiment, multiple pairs of slits 102 are formed, similar to those in the protective face shield 1-11 of the eleventh embodiment. Therefore, by selecting the appropriate pair of slits 102 based on the user's face size and the size of the mask, the gap between the protective face shield 1-12 and the mask 2 can be maintained, or the protective face shield 1-12 can be made to fit the user's face well. For example, a user with a large face can maintain the gap between the protective face shield 1-12 and the mask 2 by using the slits 102-4L and 102-4R constituting the first pair, making the protective face shield 1-12 fit the face well. Similarly, a user with a small face can maintain the gap between the protective face shield 1-12 and the mask 2 by using the slits 102-6L and 102-6R constituting the third pair, making the protective face shield 1-12 fit the face well.

[0232] <Thirteenth Implementation Method>

[0233] Reference Figure 23 The protective face shields 1-13 of the thirteenth embodiment of the present invention will be described.

[0234] Figure 23 This is a plan view showing the protective face shields 1-13.

[0235] In the protective face shield 1-13 of the thirteenth embodiment, the shapes of the engaging portions 113a and 113b formed on the cut line 113 are different from those of the protective face shield 1-1 of the first embodiment.

[0236] like Figure 23 As shown, a pair of slits 113L and 113R are formed on the left and right sides of the protective face shield 1-13 (specifically, the membrane 101-13 forming the protective face shield 1-13) to allow the straps 202 of the mask 2 to pass through. It should be noted that, unless otherwise specified, slits 113L and 113R are simply referred to as slits 113.

[0237] The cut line 113 is a closed cut line that does not intersect with the outer edge of the protective mask 1-13 (i.e., the outer edge of the membrane 101-13) but is enclosed within the inner side of the protective mask 1-13 (i.e., inside the outer edge of the membrane 101-13). The cut line 113 is formed in a manner that extends in a direction intersecting the left and right directions.

[0238] A slit line 113L is formed on the lower left side of the membrane 101-13. Two straps 202-1 and 202-2 extending from the left side of the mask 2 pass through the slit line 113L. A slit line 113R is formed on the lower right side of the membrane 101-13. Two straps 202-3 and 202-4 extending from the right side of the mask 2 pass through the slit line 113R.

[0239] The slit line 113 has engaging portions 113a and 113b that engage with the tape 202 passing through the slit line 113, and a straight portion 113c. Engaging portions 113a and 113b are formed at both ends of the slit line 113. In this embodiment, the engaging portions 113a and 113b are branches of the slit line 113 (branch portions). It should be noted that in... Figure 23 The diagram shows an example where the cut line 113 branches at three points in the engaging portions 113a and 113b, but the number of branches of the cut line 113 can be more than three. Additionally, in... Figure 23 The diagram shows an example where the slit line 113 branches into two lines at each branch in the engaging portions 113a and 113b, but the slit line 113 can also branch into three or more lines. Furthermore, in... Figure 23 The image shows an example in which the cut line 113 in the engaging portions 113a and 113b branches out to one side based on the straight portion 113c, but the cut line 113 may also have branches on both sides.

[0240] Engaging portion 113a is formed at the upper end of the cut line 113, and engaging portion 113b is formed at the lower end of the cut line 113. Straight portion 113c is the portion of the cut line 113 between engaging portions 113a and 113b. Straight portion 113c is the portion of the cut line 113 where the cut line is formed in a straight line. It should be noted that in this embodiment, the engaging portions 113a and 113b at both ends of the cut line 113 are connected by the straight portion 113c, but the present invention is not limited to this example. The connecting line between engaging portions 113a and 113b may not be straight; for example, it may be a gently curving curve. Strap 202-1 engages with engaging portion 113a of the cut line 113L, and strap 202-2 engages with engaging portion 113b of the cut line 113L. The strap 202-3 engages with the engaging part 113a of the cut line 113R, and the strap 202-4 engages with the engaging part 113b of the cut line 113R.

[0241] As described above, in the protective face shield 1-13 of the thirteenth embodiment, the engaging portions 113a and 113b are portions where the slit line 113 is branched. Therefore, the two side portions of the engaging portions 113a and 113b in the membrane 101-13 have a more complex shape compared to the two side portions of the straight portion 113c. Consequently, a greater frictional resistance is generated between the strap 202 passing through the slit line 113 and the engaging portions 113a and 113b, thereby firmly clamping the strap 202 passing through the slit line 113. Thus, the engaging portions 113a and 113b can restrict the movement of the strap 202 in two directions: the direction in which the strap 202 passes through the slit line 113 and the direction along the slit line 113.

[0242] <Fourteenth Implementation>

[0243] Reference Figure 24 The protective face shields 1-14 of the fourteenth embodiment of the present invention will be described.

[0244] Figure 24 This is a plan view showing the protective face shields 1-14.

[0245] In the protective face shield 1-14 of the fourteenth embodiment, the shapes of the engaging portions 114a and 114b formed on the cut line 114 are different from those of the protective face shield 1-1 of the first embodiment.

[0246] like Figure 24 As shown, a pair of slits 114L and 114R are formed on the left and right sides of the protective face shield 1-14 (specifically, the membrane 101-14 forming the protective face shield 1-14) to allow the straps 202 of the mask 2 to pass through. It should be noted that, unless otherwise specified, slits 114L and 114R are simply referred to as slits 114.

[0247] The cut line 114 is a closed cut line that does not intersect with the outer edge of the protective mask 1-14 (i.e., the outer edge of the membrane 101-14) but is enclosed within the inner side of the protective mask 1-14 (i.e., inside the outer edge of the membrane 101-14). The cut line 114 is formed in a manner that extends in a direction intersecting the left and right directions.

[0248] A slit line 114L is formed on the lower left side of the membrane 101-14. Two straps 202-1 and 202-2 extending from the left side of the mask 2 pass through the slit line 114L. A slit line 114R is formed on the lower right side of the membrane 101-14. Two straps 202-3 and 202-4 extending from the right side of the mask 2 pass through the slit line 114R.

[0249] The slit line 114 has engaging portions 114a and 114b and a straight portion 114c that engage with the tape 202 passing through the slit line 114. Engaging portions 114a and 114b are formed at both ends of the slit line 114. In this embodiment, the engaging portions 114a and 114b are curved portions (bent portions) of the slit line 114. Furthermore, in Figure 24 The example shown is that the engaging portions 114a and 114b are arc-shaped, but the shapes of the engaging portions 114a and 114b are not limited to this example. For example, the engaging portions 114a and 114b can be any shape that is at least partially curved, and can be elliptical or include straight sections.

[0250] Engaging portion 114a is formed at the upper end of the cut line 114, and engaging portion 114b is formed at the lower end of the cut line 114. Straight portion 114c is the portion of the cut line 114 between engaging portions 114a and 114b. Straight portion 114c is the portion of the cut line 114 where the cut line is formed in a straight line. It should be noted that in this embodiment, the engaging portions 114a and 114b at both ends of the cut line 114 are connected by the straight portion 114c, but the present invention is not limited to this example. The connecting line between engaging portions 114a and 114b may not be straight; for example, it may be a gently curving curve. Strap 202-1 engages with engaging portion 114a of the cut line 114L, and strap 202-2 engages with engaging portion 114b of the cut line 114L. The strap 202-3 engages with the engaging part 114a of the cut line 114R, and the strap 202-4 engages with the engaging part 114b of the cut line 114R.

[0251] As described above, in the protective face shield 1-14 of the fourteenth embodiment, the engaging portions 114a and 114b are curved portions of the cut line 114. Therefore, the side portions of the engaging portions 114a and 114b in the membrane 101-14 have a more complex shape compared to the side portions of the straight portion 114c. Consequently, greater frictional resistance is generated between the strap 202 passing through the cut line 114 and the engaging portions 114a and 114b, thereby firmly clamping the strap 202 passing through the cut line 114. Thus, the engaging portions 114a and 114b can restrict the movement of the strap 202 in two directions: the direction in which the strap 202 passes through the cut line 114 and the direction along the cut line 114.

[0252] <Fifteenth Implementation Method>

[0253] Reference Figure 25 and Figure 26 The protective face shields 1-15 of the fifteenth embodiment of the present invention will be described.

[0254] Figure 25 This is a plan view showing the protective face shields 1-15. Figure 26 This is a perspective view showing the protective face shields 1-15 in use. Figure 25 and 26 The image shows an example of protective face shields 1-15 being fitted onto a headband-style mask 4. However, like protective face shields 1-1, protective face shields 1-15 can be easily combined with various types of masks. For example, protective face shields 1-15 can also be attached to and detached from the aforementioned ear-loop mask 2.

[0255] like Figure 25 As shown, the mask 4 has a main body 401 and straps 402.

[0256] The main body 401 has the same configuration as the main body 201 of the mask 2 described above. Strap 402-1 extends from the upper left side of the main body 401, and strap 402-2 extends from the lower left side of the main body 401. Strap 402-3 extends from the upper right side of the main body 401, and strap 402-4 extends from the lower right side of the main body 401. Straps 402-1 and 402-3 are connected and wrapped around the user's head for wearing. Straps 402-2 and 402-4 are connected and wrapped around the user's head at a position lower than where straps 402-1 and 402-3 are worn. Thus, the mask 4 is a so-called headband-type mask.

[0257] The protective face shield 1-15 of the fifteenth embodiment differs from the protective face shield 1-1 of the first embodiment in that the slit line 115 through which the strap 402 of the mask 4 passes is an open slit line. Therefore, in addition to the ear-loop mask 2 and the tie-on mask 3, the protective face shield 1-15 can also be attached to and detached from the headband mask 4.

[0258] like Figure 25 As shown, two pairs of slits 115 (slits 115-1L, 115-1R and slits 115-2L, 115-2R) are formed on the left and right sides of the protective face shield 1-15 (specifically, the membrane 101-15 forming the protective face shield 1-15). The slits 115 allow the straps 402 of the mask 4 to pass through. Slits 115-1L and 115-1R constitute the first pair. Slits 115-2L and 115-2R constitute the second pair. The two pairs of slits 115 (i.e., slits 115-1L, 115-1R and slits 115-2L, 115-2R) are formed side-by-side in the vertical direction. Specifically, slits 115-1L and 115-1R are positioned above slits 115-2L and 115-2R. However, the number of pairs of 115 cut lines is only required to be at least one pair, which can be a single pair or more than three pairs.

[0259] The cut line 115 is an open cut line with one end intersecting the outer edge of the protective mask 1-15 (i.e., the outer edge of the membrane 101-15) and the other end disposed on the inner side of the protective mask 1-15 (i.e., inside the outer edge of the membrane 101-15).

[0260] Cut lines 115-1L and 115-2L are formed such that they intersect the outer left edge of membrane 101-15 and slope downwards as the mask moves to the right. A strap 402-1 extending from the left side of mask 4 passes through cut line 115-1L. A strap 402-2 extending from the left side of mask 4 passes through cut line 115-2L. Cut lines 115-1R and 115-2R are formed such that they intersect the outer right edge of membrane 101-15 and slope downwards as the mask moves to the left. A strap 402-3 extending from the right side of mask 4 passes through cut line 115-1R. A strap 402-4 extending from the right side of mask 4 passes through cut line 115-2R.

[0261] The slit line 115 has an engaging portion 115a and a straight portion 115b that engage with the strap 402 passing through the slit line 115. The engaging portion 115a is formed at the other end of the slit line 115 (i.e., the end disposed inside the protective face shield 1-15). In this embodiment, the engaging portion 115a, like the engaging portions 114a and 114b of the slit line 114 in the fourteenth embodiment, is a curved portion of the slit line 115. However, the shape of the engaging portion 115a is not limited to this example. For example, the engaging portion 115a may be a serrated portion of the slit line 115 as in the first embodiment, or a branched portion of the slit line 115 as in the thirteenth embodiment. The straight portion 115b is the portion of the slit line 115 between the engaging portion 115a and the outer edge of the membrane 101-15. The straight portion 115b is the portion of the slit line 115 that is formed in a straight line. It should be noted that in the slit line 115 of this embodiment, the engaging portion 115a is connected to the outer edge of the membrane 101-15 via a straight portion 115b, but the present invention is not limited to this example. The connecting line between the engaging portion 115a and the outer edge of the membrane 101-15 does not have to be straight; for example, it can be a gently curved line. In addition, in order to prevent the tape 402 from falling off, the connecting line can also be formed into a complex shape, such as a serrated shape.

[0262] Two straps 402-1 and 402-2 extending from the left side of the mask 4 engage with two locking portions 115a formed on the two open cut lines 115-1L and 115-2L on the left side of the protective face shield 1-15. Strap 402-1 engages with the locking portion 115a of cut line 115-1L, and strap 402-2 engages with the locking portion 115a of cut line 115-2L. Two straps 402-3 and 402-4 extending from the right side of the mask 4 engage with two locking portions 115a formed on the two open cut lines 115-1R and 115-2R on the right side of the protective face shield 1-15. Strap 402-3 engages with the engaging portion 115a of the cut line 115-1R, and strap 402-4 engages with the engaging portion 115a of the cut line 115-2R. In particular, from the viewpoint of stably holding and securing the protective face shield 1-15, it is preferable that the portion of strap 402 as close as possible to the main body 401 engages with the engaging portion 115a.

[0263] The membranes 101-15 on both sides of the engaging portion 115a are used to clamp the strap 402 that passes through the slit line 115. Thus, the engaging portion 115a restricts the movement of the strap 402 in two directions: the direction in which the strap 402 passes through the slit line 115 and the direction along the slit line 115. Therefore, the protective face shield 1-15 can be easily attached to and detached from the mask 4, and the protective face shield 1-15 can be stably held and secured to the mask 4 during use.

[0264] In particular, in the protective face shield 1-15 of the fifteenth embodiment, two straps 402 extending from one side of the mask 4 in the left-right direction pass through two open slits formed on one side of the protective face shield 1-1 in the left-right direction. Furthermore, the two straps 402 engage with two engaging portions 115a formed at the other end of the two open slits, i.e., slits 115. Thus, the protective face shield 1-15 is supported at four points by a total of four straps 402. Therefore, the protective face shield 1-15 can be held and secured more stably during use.

[0265] <Sixteenth Implementation Method>

[0266] Reference Figures 27-29 The protective face shields 1-16 of the sixteenth embodiment of the present invention will be described.

[0267] Figure 27 This is a plan view showing the protective face shields 1-16. Figure 28 This is a schematic diagram showing the state of the variable part 116 before and after deformation, as described later. Specifically, Figure 28 This is a diagram of the protective face shield 1-16 viewed from the rear (i.e., from the user's side). Figure 29This is a cross-sectional view showing the deformed state of the variable part 116, which will be described later. Specifically, Figure 29 It is a cross-sectional view showing a section orthogonal to the surface of the protective face shield 1-16.

[0268] The protective face shields 1-16 of the sixteenth embodiment are similar to those of the protective face shields 1-15 of the fifteenth embodiment, and can be attached to or detached from the headband-style mask 4, in addition to the ear-loop mask 2 or the cord-tying mask 3. Hereinafter, an example of attaching the protective face shields 1-16 to the headband-style mask 4 will be described.

[0269] In the protective face shield 1-16 of the sixteenth embodiment, the mechanism through which the strap 402 of the mask 4 passes and the mechanism by which the protective face shield 1-16 engages with the strap 402 are different from those of the protective face shield 1-15 of the fifteenth embodiment.

[0270] like Figure 27 As shown, two pairs of variable portions 116 (variable portions 116-1L, 116-1R and variable portions 116-2L, 116-2R) are formed on the left and right sides of the protective mask 1-16 (specifically, the membrane 101-16 forming the protective mask 1-16). The variable portions 116 are part of the membrane 101-16. That is, the variable portions 116 are portions of the membrane 101-16 that can be deformed by partially cutting along the cut line 117 formed on the protective mask 1-16.

[0271] Variable parts 116-1L and 116-1R constitute a first pair. Variable parts 116-2L and 116-2R constitute a second pair. The two pairs of variable parts 116 (i.e., variable parts 116-1L, 116-1R and variable parts 116-2L, 116-2R) are formed side by side in the vertical direction. Specifically, variable parts 116-1L and 116-1R are positioned above variable parts 116-2L and 116-2R. However, the number of pairs of variable parts 116 need only be at least one pair, or it can be a single pair or more than three pairs.

[0272] The cut line 117 is U-shaped. The two ends of the cut line 117 forming the variable portions 116-1L and 116-1R are positioned on the upper side, and the cut line 117 is formed by extending downwards from these two ends. Therefore, each variable portion 116 of the variable portions 116-1L and 116-1R can be bent with its upper end as a fulcrum. The two ends of the cut line 117 forming the variable portions 116-2L and 116-2R are positioned on the lower side, and the cut line 117 is formed by extending upwards from these two ends. Therefore, each variable portion 116 of the variable portions 116-2L and 116-2R can be bent with its lower end as a fulcrum. However, the shape of the cut line 117 is not limited to this example; for example, it can also be arc-shaped.

[0273] An insertion portion 118 is formed adjacent to the variable portion 116 in the protective face shield 1-16, allowing the variable portion 116 to be inserted. The insertion portion 118 is formed by a cut line (specifically, a closed cut line extending in the left-right direction). The insertion portions 118 that can be inserted into the variable portions 116-1L and 116-1R are formed above each variable portion 116. The insertion portions 118 that can be inserted into the variable portions 116-2L and 116-2R are formed below each variable portion 116.

[0274] like Figure 28 As shown, the variable portion 116 deforms such that its front end is inserted into the insertion portion 118. Before the variable portion 116 deforms, the strap 402 of the mask 4 is positioned in a state where it is clamped in the front-back direction by the membranes 101-16 on both sides of the variable portion 116 and the variable portion 116. In this state, specifically, the strap 402 of the mask 4 passes behind the membranes 101-16 on both sides of the variable portion 116 and passes in front of the variable portion 116. The variable portion 116 is bent together with the strap 402 from this state and inserted into the insertion portion 118. At this time, the variable portion 116 is bent along the bending line L5 disposed at the base end of the variable portion 116.

[0275] Here, locking claws 119 are formed on the left and right sides of the variable part 116 to lock the variable part 116 into the insertion part 118. Figure 28 In the example shown, the left and right sides of the variable portion 116 are formed in a serrated shape, thereby forming multiple locking claws 119 on each side of the variable portion 116. When the variable portion 116 is inserted into the insertion portion 118, the locking claws 119 lock the variable portion 116 into the insertion portion 118. After the variable portion 116 is deformed, as... Figure 28 and Figure 29 As shown, a clamp 120 is formed by the deformable variable portion 116 and the membranes 101-16, allowing the strap 402 of the mask 4 to pass through. The clamp 120 engages with the strap 402 passing through it. The clamp 120 is only required to be a closed annular portion that forms an internal space through which the strap 402 can pass; the shape of the clamp 120 is not particularly limited. For example, the clamp 120 can be circular, elliptical, or include straight sections.

[0276] Specifically, the strap 402-1 extending from the left side of the mask 4 passes through and engages with the clamp 120 formed by the variable portion 116-1L. The strap 402-2 extending from the left side of the mask 4 passes through and engages with the clamp 120 formed by the variable portion 116-2L. The strap 402-3 extending from the right side of the mask 4 passes through and engages with the clamp 120 formed by the variable portion 116-1R. The strap 402-4 extending from the right side of the mask 4 passes through and engages with the clamp 120 formed by the variable portion 116-2R. In particular, from the viewpoint of stably holding and securing the protective face shield 1-16, it is preferable that the portion of the strap 402 closest to the main body 401 engages with the clamp 120.

[0277] As described above, in the protective face shield 1-16 of the sixteenth embodiment, a clamp 120 is formed by deforming the variable portion 116, through which the strap 402 of the mask 4 can pass. Specifically, the clamp 120 is formed by inserting the variable portion 116 into the insertion portion 118. In particular, the clamp 120 is stably formed by locking the variable portion 116 into the insertion portion 118 using the locking claw 119. Furthermore, the clamp 120 engages with the strap 402 passing through the clamp 120. This restricts the movement of the strap 402 in the direction in which the strap 402 passes through the clamp 120. Therefore, the protective face shield 1-16 can be easily attached to and detached from the mask 4, and the protective face shield 1-16 can be stably held and fixed to the mask 4 during use.

[0278] In particular, in the protective face shield 1-16 of the sixteenth embodiment, two straps 402 extending from one side of the mask 4 in the left-right direction respectively engage with clamps 120 formed by two variable parts 116 formed on one side of the protective face shield 1-1 in the left-right direction. Thus, the protective face shield 1-16 is supported at four points by a total of four straps 402. Therefore, the protective face shield 1-16 can be held and secured more stably during use.

[0279] <Seventeenth Implementation Method>

[0280] Reference Figures 30-32 The protective face shields 1-17 of the seventeenth embodiment of the present invention will be described.

[0281] Figure 30 This is a plan view showing the protective face shields 1-17. Figure 31 This is a schematic diagram showing the state of the variable part 121 before and after deformation, as described later. Specifically, Figure 31 This is a diagram of the protective face shield 1-17 viewed from the rear (i.e., from the user's side). Figure 32 This is a perspective view showing the protective face shields 1-17 in use. Figure 32The image shows an example of a protective face shield 1-17 being fitted onto a headband-style mask 4. However, like protective face shields 1-15 and 1-16, protective face shield 1-17 can also be attached to or detached from the ear loop mask 2 or the tie-on mask 3, in addition to the headband-style mask 4.

[0282] In the protective face shield 1-17 of the seventeenth embodiment, the configuration of the variable part 121 is different from that of the protective face shield 1-16 of the sixteenth embodiment.

[0283] like Figure 30 As shown, four pairs of variable portions 121 (variable portions 121-1L, 121-1R, 121-2L, 121-2R, 121-3L, 121-3R, and 121-4L, 121-4R) are formed on the left and right sides of the protective mask 1-17 (specifically, the membrane 101-17 forming the protective mask 1-17). The variable portions 121 are deformable portions that are partially cut along the cut line 122 formed on the protective mask 1-17.

[0284] Variable parts 121-1L and 121-1R form a first pair. Variable parts 121-2L and 121-2R form a second pair. Variable parts 121-3L and 121-3R form a third pair. Variable parts 121-4L and 121-4R form a fourth pair. Variable parts 121-1L and 121-1R (the first pair) are positioned above variable parts 121-2L and 121-2R (the second pair). Variable parts 121-3L and 121-3R (the third pair) are positioned above variable parts 121-4L and 121-4R (the fourth pair). Variable parts 121-1L and 121-1R (the first pair) are positioned relative to variable parts 121-3L and 121-3R (the third pair) on the outside of the protective face shield 1-17. The variable parts 121-2L and 121-2R (second pair) are arranged on the outside of the protective face shield 1-17 relative to the variable parts 121-4L and 121-4R (fourth pair). However, the number of pairs of variable parts 121 is only required to be at least one pair, or it can be more than four pairs.

[0285] The cut line 122 is U-shaped. The two ends of the cut line 122 forming the variable portions 121-1L, 121-1R (first pair) and 121-3L, 121-3R (third pair) are positioned on the upper side, and the cut line 122 is formed to extend downwards from these two ends. Therefore, each variable portion 121 of the variable portions 121-1L, 121-1R (first pair) and 121-3L, 121-3R (third pair) can be bent with its upper end as a fulcrum. The two ends of the cut line 122 forming the variable portions 121-2L, 121-2R (second pair) and 121-4L, 121-4R (fourth pair) are positioned on the lower side, and the cut line 122 is formed to extend upwards from these two ends. Therefore, each variable portion 121 of the variable portions 121-2L, 121-2R (second pair) and the variable portions 121-4L, 121-4R (fourth pair) can be bent with the lower end of each variable portion 121 as a fulcrum. However, the shape of the cut line 122 is not limited to this example, and can also be an arc shape, for example.

[0286] An insertion portion 123 is formed in the protective face shield 1-17 adjacent to the variable portion 121, allowing insertion of the variable portion 121. The insertion portion 123 is formed by a cut line (specifically, a U-shaped closed cut line). However, as in the sixteenth embodiment, the insertion portion 123 may also be a closed cut line extending in the left-right direction. Specifically, insertion portions 123 capable of inserting variable portions 121-1L, 121-1R (first pair) and variable portions 121-3L, 121-3R (third pair) are formed above each variable portion 121. Insertion portions 123 capable of inserting variable portions 121-2L, 121-2R (second pair) and variable portions 121-4L, 121-4R (fourth pair) are formed below each variable portion 121.

[0287] like Figure 31 As shown, the variable part 121 deforms such that its front end is inserted into the insertion part 123. Before the variable part 121 deforms, the strap 402 of the mask 4 is positioned in a state where it is clamped in the front-back direction by the membranes 101-17 on both sides of the variable part 121 and the variable part 121. In this state, specifically, the strap 402 of the mask 4 passes behind the membranes 101-17 on both sides of the variable part 121 and passes in front of the variable part 121. The variable part 121 is bent together with the strap 402 from this state and inserted into the insertion part 123. At this time, the variable part 121 is bent along the bending line L6 disposed at the base end of the variable part 121.

[0288] Here, a locking claw 124 is formed on the side of the variable portion 121 to lock the variable portion 121 into the insertion portion 123. The locking claw 124 is a key-shaped portion protruding outward from the side of the variable portion 121. When the variable portion 121 is inserted into the insertion portion 123, the variable portion 121 is locked into the insertion portion 123 by the locking claw 124. After the variable portion 121 is deformed, as in the sixteenth embodiment, a hoop portion 125 is formed by the deformed variable portion 121 and the membranes 101-17, through which the strap 402 of the mask 4 can pass. The hoop portion 125 engages with the strap 402 passing through the hoop portion 125. In addition, the shape of the hoop portion 125 is the same as that of the hoop portion 120 in the sixteenth embodiment, and is not particularly limited.

[0289] Specifically, the strap 402-1 extending from the left side of the mask 4 passes through and engages with the clamp 125 formed by the variable portion 121-1L or the variable portion 121-3L. The strap 402-2 extending from the left side of the mask 4 passes through and engages with the clamp 125 formed by the variable portion 121-2L or the variable portion 121-4L. The strap 402-3 extending from the right side of the mask 4 passes through and engages with the clamp 125 formed by the variable portion 121-1R or the variable portion 121-3R. The strap 402-4 extending from the right side of the mask 4 passes through and engages with the clamp 125 formed by the variable portion 121-2R or the variable portion 121-4R. In particular, from the viewpoint of stably maintaining and securing the protective face shield 1-17, it is preferable that the portion of the strap 402 as close as possible to the main body 401 engages with the clamp 125.

[0290] As described above, in the protective face shield 1-17 of the seventeenth embodiment, similarly to the sixteenth embodiment, the clamp portion 125 is formed by deforming the variable portion 121. Specifically, the clamp portion 125 is formed by inserting the variable portion 121 into the insertion portion 123. In particular, the clamp portion 125 is stably formed by locking the variable portion 121 into the insertion portion 123 using the locking claw 124. Furthermore, the movement of the strap 402 in the direction through which the strap 402 passes through the clamp portion 125 is restricted by engaging with the clamp portion 125. Therefore, the protective face shield 1-17 can be easily attached to and detached from the mask 4, and the protective face shield 1-17 can be stably held and fixed to the mask 4 during use.

[0291] Here, the spacing between variable parts 121-1L and 121-2L and between variable parts 121-1R and 121-2R is wider than the spacing between variable parts 121-3L and 121-4L and between variable parts 121-3R and 121-4R. Therefore, by selecting a pair of variable parts 121 according to the user's face and the size of the mask, it is possible to maintain the gap between the protective face shield 1-17 and the mask 4, or to ensure that the protective face shield 1-17 fits the user's face well.

[0292] For example, users with large faces can maintain the gap between the protective mask 1-17 and the face mask 4 by using the variable parts 121-1L and 121-2L, and the variable parts 121-1R and 121-2R, so that the protective mask 1-17 fits the face well. In this case, the strap 402-1 extending from the left side of the face mask 4 passes through the clamp 125 formed by the variable part 121-1L, and the strap 402-2 extending from the left side of the face mask 4 passes through the clamp 125 formed by the variable part 121-2L. In addition, the strap 402-3 extending from the right side of the face mask 4 passes through the clamp 125 formed by the variable part 121-1R, and the strap 402-4 extending from the right side of the face mask 4 passes through the clamp 125 formed by the variable part 121-2R.

[0293] Additionally, for example, users with small faces can maintain the gap between the protective mask 1-17 and the face mask 4 by using the variable parts 121-3L and 121-4L, and the variable parts 121-3R and 121-4R, so that the protective mask 1-17 fits the face well. In this case, the strap 402-1 extending from the left side of the face mask 4 passes through the clamp 125 formed by the variable part 121-3L, and the strap 402-2 extending from the left side of the face mask 4 passes through the clamp 125 formed by the variable part 121-4L. Furthermore, the strap 402-3 extending from the right side of the face mask 4 passes through the clamp 125 formed by the variable part 121-3R, and the strap 402-4 extending from the right side of the face mask 4 passes through the clamp 125 formed by the variable part 121-4R.

[0294] Furthermore, in the protective mask 1-17 of the seventeenth embodiment, similar to the protective mask 1-2 of the second embodiment, a notch 126 is formed in the protective mask 1-17 at a position opposite to the user's respiratory organs.

[0295] like Figure 32As shown, the notch 126 is formed at a position opposite to the user's respiratory organs (e.g., mouth and nose) during use. Therefore, exhaled air from the user's respiratory organs, after passing through or around the mask 4, is discharged to the outside of the protective face shield 1-17 through the notch 126. Thus, the protective face shield 1-17 can be effectively prevented from becoming blurred by the user's exhaled air, and good vision can be maintained.

[0296] Furthermore, in the protective face shield 1-17 of the seventeenth embodiment, similar to the protective face shield 1-6 of the sixth embodiment, bending lines L7 and L8 are provided between the front side portion P10 and the side side portions P11 and P12 of the user's face in the protective face shield 1-17.

[0297] In addition, such as Figure 30 As shown, the left side portion of the protective face shield 1-17, which has variable portions 121-1L, 121-2L, 121-3L, and 121-4L, is the left side portion P11 (hereinafter referred to as "left side portion P11") of the user's face. The right side portion of the protective face shield 1-17, which has variable portions 121-1R, 121-2R, 121-3R, and 121-4R, is the right side portion P12 (hereinafter referred to as "right side portion P12") of the user's face. A portion P10 (hereinafter referred to as "front portion P10") is the portion between portions P11 and P12 in the protective face shield 1-17. The left side portion P11 can be bent relative to the front portion P10 along the bending line L7. The right side portion P12 can be bent relative to the front portion P10 along the bending line L8. To make the left side portion P11 and the right side portion P12 easier to bend, toothed holes can also be provided on the bending lines L7 and L8.

[0298] like Figure 32 As shown, when using the protective face shield 1-17, the left side portion P11 and the right side portion P12 are bent towards the user's face along bending lines L7 and L8. Therefore, the front portion P10 of the protective face shield 1-17 faces the user's face while maintaining a flat shape. Thus, when the front portion P10 of the protective face shield 1-17 is flat, compared to when the front portion P10 is curved, it can suppress the entry of external light, thereby maintaining good visibility.

[0299] <Eighteenth Implementation Method>

[0300] Reference Figure 33 and Figure 34 The protective face shields 1-18 of the eighteenth embodiment of the present invention will be described.

[0301] Figure 33 This is a plan view showing the protective face shields 1-18. Figure 34 This is a schematic diagram showing the state of the variable part 127 before and after deformation, as described later. Specifically, Figure 34 This is a diagram of the protective face shield 1-18 viewed from the rear (i.e., from the user's side).

[0302] The protective face shield 1-18 of the eighteenth embodiment, like the protective face shield 1-15 of the fifteenth embodiment, the protective face shield 1-16 of the sixteenth embodiment, and the protective face shield 1-17 of the seventeenth embodiment, can be attached to and detached from the headband-type mask 4, in addition to the ear-loop mask 2 or the tie-on mask 3. Hereinafter, an example of attaching the protective face shield 1-18 to the headband-type mask 4 will be described.

[0303] In the protective face shield 1-18 of the eighteenth embodiment, the configuration of the variable part 127 is different from that of the protective face shield 1-16 of the sixteenth embodiment and the protective face shield 1-17 of the seventeenth embodiment.

[0304] like Figure 33 As shown, four pairs of variable portions 127 (variable portions 127-1L, 127-1R, 127-2L, 127-2R, 127-3L, 127-3R, and 127-4L, 127-4R) are formed on the left and right sides of the protective mask 1-18 (specifically, the membrane 101-18 forming the protective mask 1-18). The variable portions 127 are deformable portions that are partially cut along the cut lines 128 formed on the protective mask 1-18.

[0305] Variable parts 127-1L and 127-1R form a first pair. Variable parts 127-2L and 127-2R form a second pair. Variable parts 127-3L and 127-3R form a third pair. Variable parts 127-4L and 127-4R form a fourth pair. Variable parts 127-1L and 127-1R (the first pair) are positioned above variable parts 127-2L and 127-2R (the second pair). Variable parts 127-3L and 127-3R (the third pair) are positioned above variable parts 127-4L and 127-4R (the fourth pair). Variable parts 127-1L and 127-1R (the first pair) are positioned relative to variable parts 127-3L and 127-3R (the third pair) on the outside of the protective face shield 1-18. The variable parts 127-2L and 127-2R (second pair) are arranged on the outside of the protective face shield 1-18 relative to the variable parts 127-4L and 127-4R (fourth pair). However, the number of pairs of variable parts 127 is only required to be at least one pair, or it can be more than four pairs.

[0306] The cut line 128 is U-shaped. The two ends of the cut line 128 forming the variable portions 127-1L, 127-1R (first pair) and 127-3L, 127-3R (third pair) are positioned on the upper side, and the cut line 128 is formed to extend downwards from these two ends. Therefore, each variable portion 127 of the variable portions 127-1L, 127-1R (first pair) and 127-3L, 127-3R (third pair) can be bent with its upper end as a fulcrum. The two ends of the cut line 128 forming the variable portions 127-2L, 127-2R (second pair) and 127-4L, 127-4R (fourth pair) are positioned on the lower side, and the cut line 128 is formed to extend upwards from these two ends. Therefore, each variable portion 127 of the variable portions 127-2L, 127-2R (second pair) and the variable portions 127-4L, 127-4R (fourth pair) can be bent with the lower end of each variable portion 127 as a fulcrum. However, the shape of the cut line 128 is not limited to this example, and can also be an arc shape, for example.

[0307] An insertion portion 129 is formed in the protective face shield 1-18 adjacent to the variable portion 127, allowing insertion of the variable portion 127. The insertion portion 129 is formed by a cut line (specifically, a U-shaped closed cut line). However, as in the sixteenth embodiment, the insertion portion 129 may also be a closed cut line extending in the left-right direction. Specifically, insertion portions 129 capable of inserting variable portions 127-1L, 127-1R (first pair) and variable portions 127-3L, 127-3R (third pair) are formed above each variable portion 127. Insertion portions 129 capable of inserting variable portions 127-2L, 127-2R (second pair) and variable portions 127-4L, 127-4R (fourth pair) are formed below each variable portion 127.

[0308] Here, a locking claw 130 is formed on the front end side of the variable portion 127 to lock the variable portion 127 into the insertion portion 129. The locking claw 130 is a portion that is partially cut along an arc-shaped closed cut line that curves toward the base end side of the variable portion 127. However, the closed cut line can be formed as long as it protrudes toward the base end side of the variable portion 127, for example, it can be polygonal, or it can be a shape that includes straight and curved portions.

[0309] like Figure 34As shown, the variable portion 127 deforms such that its front end is inserted into the insertion portion 129. Before the variable portion 127 deforms, the strap 402 of the mask 4 is positioned in a state where it is clamped in the front-back direction by the membranes 101-18 on both sides of the variable portion 127 and the variable portion 127. In this state, specifically, the strap 402 of the mask 4 passes behind the membranes 101-18 on both sides of the variable portion 127 and passes in front of the variable portion 127. The variable portion 127 bends together with the strap 402 from this state. At this time, the variable portion 127 bends along the bending line L9 disposed at the base end of the variable portion 127.

[0310] With the variable portion 127 bent and inserted into the insertion portion 129, the locking claw 130 locks the variable portion 127 into the insertion portion 129. After the variable portion 127 is deformed, similar to the sixteenth and seventeenth embodiments, the deformed variable portion 127 and the membranes 101-18 form a clamp portion 131 through which the strap 402 of the mask 4 can pass. The clamp portion 131 engages with the strap 402 passing through the clamp portion 131. Furthermore, the shape of the clamp portion 131 is the same as that of the clamp portion 120 in the sixteenth embodiment and the clamp portion 125 in the seventeenth embodiment, and is not particularly limited.

[0311] Specifically, the strap 402-1 extending from the left side of the mask 4 passes through and engages with the clamp 131 formed by the variable portion 127-1L or the variable portion 127-3L. The strap 402-2 extending from the left side of the mask 4 passes through and engages with the clamp 131 formed by the variable portion 127-2L or the variable portion 127-4L. The strap 402-3 extending from the right side of the mask 4 passes through and engages with the clamp 131 formed by the variable portion 127-1R or the variable portion 127-3R. The strap 402-4 extending from the right side of the mask 4 passes through and engages with the clamp 131 formed by the variable portion 127-2R or the variable portion 127-4R. In particular, from the viewpoint of stably maintaining and securing the protective face shield 1-18, it is preferable that the portion of the strap 402 as close as possible to the main body 401 engages with the clamp 131.

[0312] As described above, in the protective face shields 1-18 of the eighteenth embodiment, similarly to the sixteenth and seventeenth embodiments, the clamp portion 131 is formed by deforming the variable portion 127. Specifically, the clamp portion 131 is formed by inserting the variable portion 127 into the insertion portion 129. In particular, the clamp portion 131 is stably formed by locking the variable portion 127 into the insertion portion 129 using the locking claw 130. Furthermore, the movement of the strap 402 in the direction through which the strap 402 passes through the clamp portion 131 is restricted by engaging with the clamp portion 131. Therefore, the protective face shields 1-18 can be easily attached and detached from the mask 4, and the protective face shields 1-17 can be stably held and fixed to the mask 4 during use.

[0313] Here, the spacing between variable parts 127-1L and 127-2L and between variable parts 127-1R and 127-2R is wider than the spacing between variable parts 127-3L and 127-4L and between variable parts 127-3R and 127-4R. Therefore, similar to the seventeenth embodiment, by selecting the pair of variable parts 127 according to the user's face and the size of the mask, the gap between the protective face shield 1-18 and the mask 4 can be maintained, or the protective face shield 1-18 can be made to fit the user's face well.

[0314] For example, users with large faces can maintain the gap between the protective face shield 1-18 and the mask 4 by using variable parts 127-1L and 127-2L, and variable parts 127-1R and 127-2R, so that the protective face shield 1-18 fits well on the face. Conversely, users with small faces can maintain the gap between the protective face shield 1-18 and the mask 4 by using variable parts 127-3L and 127-4L, and variable parts 127-3R and 127-4R, so that the protective face shield 1-18 fits well on the face.

[0315] Furthermore, the protective face shield 1-18 of the eighteenth embodiment, like the protective face shield 1-10 of the tenth embodiment, has an assembly structure 132 that can be assembled into a shape that tapers at the front end as it moves away from the user's face.

[0316] like Figure 33 As shown, the protective face shield 1-18 (specifically, the membrane 101-18 forming the protective face shield 1-18) has: a portion P13 that is the front side of the user's face and opposite to the eyes, a portion P14 that is the left side of the user's face, a portion P15 that is the right side of the user's face, and a portion P16 that is the front side of the user's face and opposite to the respiratory organs.

[0317] exist Figure 33In the plan view shown, similar to the protective face shield 1-10 of the tenth embodiment, portion P14 (i.e., the left side of the protective face shield 1-18) is formed extending downward to the left from portion P13 (i.e., the upper part of the protective face shield 1-18). Portion P15 (i.e., the right side of the protective face shield 1-18) is formed extending downward to the right from portion P13. Portion P16 (i.e., the lower part of the protective face shield 1-18) is formed between portions P14 and P15, extending downward from portion P13. Portion P16 is spaced apart from portions P14 and P15 in the left-right direction.

[0318] The assembly structure 132 includes: a cut line 132a formed in part P14; a cut line 132b formed in part P15; protrusions 132c and 132d formed in part P16; and locking portions 132e and 132f formed in the protrusions 132c and 132d respectively.

[0319] Cut lines 132a and 132b are closed cut lines. Cut line 132a is formed on the lower right side of portion P14 and extends along the outer edge of the lower left side of portion P14. Cut line 132b is formed on the lower left side of portion P15 and extends along the outer edge of the lower right side of portion P15. Protrusion 132c is formed on the lower left side of portion P6 and protrudes downward. Protrusion 132d is formed on the lower right side of portion P6 and protrudes downward. Protrusions 132c and 132d are portions partially cut along a closed cut line that curves downward. However, the closed cut line can be formed as long as it protrudes downward; for example, it can be a polygon or a shape that includes straight and curved portions. Locking portions 132e and 132f are key-shaped portions formed on the sides of protrusions 132c and 132d.

[0320] When the protective face shield 1-18 is assembled using assembly structure 132, the protrusion 132c of part P16 passes through the cut line 132a of part P14. At this time, the protrusion 132c is locked to the cut line 132a by the locking part 132e formed on the protrusion 132c. Additionally, the protrusion 132d of part P16 passes through the cut line 132b of part P15. At this time, the protrusion 132d is locked to the cut line 132b by the locking part 132f formed on the protrusion 132d. Thus, the protective face shield 1-18 is assembled into a three-dimensional shape that tapers at the front end as it moves away from the user's face, similar to the protective face shield 1-10 of the tenth embodiment (e.g., Figure 20 (as shown in the shape). Therefore, the protective face shield 1-18 according to the eighteenth embodiment can achieve the same effect as the protective face shield 1-10 of the tenth embodiment.

[0321] <Nineteenth Implementation Method>

[0322] Reference Figures 35-37 The protective face shields 1-19 of the nineteenth embodiment of the present invention will be described.

[0323] Figure 35 This is a plan view showing the protective face shields 1-19. Figure 36 This is a schematic diagram showing the state of the variable part 133 (specifically, variable parts 133-1L and 133-2L) before and after deformation, as described later. Specifically, Figure 36 This is a diagram of the protective face shield 1-19 viewed from the rear (i.e., from the user's side). Figure 37 This is a perspective view showing the protective face shields 1-19 in use. Figure 37 The image shows an example of a protective face shield 1-19 being fitted onto an ear loop mask 2. However, like protective face shields 1-15, 1-16, 1-17, and 1-18, protective face shield 1-19 can also be attached to or detached from a drawstring mask 3 or a headband mask 4, in addition to the ear loop mask 2.

[0324] In the protective face shield 1-19 of the nineteenth embodiment, unlike the protective face shield 1-16 of the sixteenth embodiment, the protective face shield 1-17 of the seventeenth embodiment, and the protective face shield 1-18 of the eighteenth embodiment, the clamp portion 136 formed by the variable portion 133 (see reference) Figure 36 It does not engage with the strap 202 of the mask 2. That is, when the strap 202 passes through the hoop 136, the hoop 136 can move relative to the strap 202 in the passing direction of the strap 202.

[0325] Furthermore, in the sixteenth, seventeenth, and eighteenth embodiments described above, the protective face shields 1-16, 1-17, and 1-18 are installed on both the upper straps 202-1 and 202-3 and the lower straps 202-2 and 202-4 of the mask 2. In contrast, in the nineteenth embodiment, the protective face shield 1-19 is installed only on the upper straps 202-1 and 202-3 of the mask 2, and not on the lower straps 202-2 and 202-4.

[0326] like Figure 35 As shown, two pairs of variable portions 133 (variable portions 133-1L, 133-1R and variable portions 133-2L, 133-2R) are formed on the left and right sides of the protective face shield 1-19 (specifically, the membrane 101-19 forming the protective face shield 1-19). The variable portions 133 are deformable parts of the protective face shield 1-19. Specifically, the variable portions 133 are parts that allow the membrane 101-19 to be easily bent.

[0327] Variable parts 133-1L and 133-1R constitute a first pair. Variable parts 133-2L and 133-2R constitute a second pair. Variable parts 133-1L and 133-1R (the first pair) are disposed on the outside of the protective face shield 1-19 relative to variable parts 133-2L and 133-2R (the second pair). On the left side of the protective face shield 1-19, variable parts 133-1L and 133-2L are formed spaced apart in the left-right direction. On the right side of the protective face shield 1-19, variable parts 133-1R and 133-2R are formed spaced apart in the left-right direction. Thus, on one side of the protective face shield 1-19 in the left-right direction, two variable parts 133 are formed spaced apart in the left-right direction.

[0328] However, as long as two or more of the clamp portions 136 described later can be formed on one side of the protective face shield 1-19 in the left-right direction, the number of variable portions 133 formed on one side of the protective face shield 1-19 in the left-right direction can be at least one, or more than three. In addition, the number of variable portions 133 formed on the left side of the protective face shield 1-19 and the number of variable portions 133 formed on the right side of the protective face shield 1-19 can be different from each other.

[0329] The variable portion 133 is formed by extending downward from the left and right sides of the protective face shield 1-19. The outer edge of the variable portion 133 is in a downward protruding shape (e.g., U-shaped). However, the shape of the outer edge of the variable portion 133 is not limited to this example; for example, it can be an arc shape, an ellipse shape, an arbitrary curved shape, or a square protruding shape. Each variable portion 133 can be bent upward along the bending line L10 disposed at the base end of each variable portion 133.

[0330] An insertion portion 134 is formed in the protective face shield 1-19 adjacent to the variable portion 133, allowing the variable portion 133 to be inserted. The insertion portion 134 is formed by a cut line (specifically, a U-shaped closed cut line). However, as in the sixteenth embodiment, the insertion portion 134 may also be a closed cut line formed in a manner extending in the left-right direction. Specifically, the insertion portion 134 is formed above each variable portion 133.

[0331] Here, a locking claw 135 is formed on the front end side of the variable portion 133 to lock the variable portion 133 into the insertion portion 134. The locking claw 135 is a portion that is partially cut along an arc-shaped closed cut line that curves toward the base end of the variable portion 133. However, the closed cut line can be formed as long as it protrudes toward the base end of the variable portion 133, for example, it can be polygonal, or it can be a shape that includes straight and curved portions.

[0332] like Figure 36As shown, the variable part 133 deforms such that its front end is inserted into the insertion part 134. Before the variable part 133 deforms, on one side of the protective face shield 1-19 in the left-right direction, the strap 202 of the mask 2 is positioned behind two variable parts 133 (e.g., variable parts 133-1L, 133-2L). From this position, the two variable parts 133 are bent along the bending line L10 in a manner that clamps the strap 202.

[0333] With the variable portion 133 bent and inserted into the insertion portion 134, the locking claw 135 locks the variable portion 133 into the insertion portion 134. After the variable portion 133 is deformed, similar to the sixteenth to eighteenth embodiments, the deformed variable portion 133 and the membranes 101-19 form a clamp portion 136 through which the strap 202 of the mask 2 can pass. In the nineteenth embodiment, on one side of the protective face shield 1-19 in the left-right direction, two clamp portions 136 are formed at intervals in the left-right direction by deforming two variable portions 133.

[0334] Furthermore, the shape of the clamp 136 is the same as in the sixteenth to eighteenth embodiments and is not particularly limited. Additionally, when the number of variable portions 133 formed on one side of the protective face shield 1-19 in the left-right direction is three or more, the number of clamp portions 136 formed on one side of the protective face shield 1-19 in the left-right direction is also three or more. Furthermore, the number of clamp portions 136 formed on the left side of the protective face shield 1-19 and the number of clamp portions 136 formed on the right side of the protective face shield 1-19 may differ from each other.

[0335] Of the two straps 202 on one side of the mask 2 in the left-right direction, the upper strap 202 (specifically, strap 202-1 or strap 202-3) passes through two clamps 136. Specifically, the upper strap 202-1 of the strap 202 extending from the left side of the mask 2 passes through two clamps 136 formed by variable parts 133-1L and 133-2L (i.e., the two clamps 136 formed on the left side of the protective face shield 1-19). The upper strap 202-3 of the strap 202 extending from the right side of the mask 2 passes through two clamps 136 formed by variable parts 133-1R and 133-2R (i.e., the two clamps 136 formed on the right side of the protective face shield 1-19). Thus, as Figure 37 As shown, protective face shields 1-19 are fitted onto mask 2. Protective face shields 1-19 primarily cover the user's eyes and the area around the eyes. Furthermore, in... Figure 37In the example shown, the protective mask 1-19 covers not only the user's eyes but also the entire forehead area. However, it is also possible for the protective mask 1-19 to be narrower in the vertical direction than in this example, covering only the user's eyes and the lower part of the forehead.

[0336] As described above, in the protective face shields 1-19 of the nineteenth embodiment, the clamp portion 136 is formed by deforming the variable portion 133. Specifically, the clamp portion 136 is formed by inserting the variable portion 133 into the insertion portion 134. In particular, the clamp portion 136 is stably formed by locking the variable portion 133 into the insertion portion 134 using the locking claw 135. Furthermore, the upper strap 202 of the mask 2 passes through the clamp portion 136. Therefore, the protective face shields 1-19 are supported only by the two upper straps 202 of the mask 2, and thus, unlike the cases where they are supported by a total of four straps 202 (for example, in the sixteenth to eighteenth embodiments described above), it is not necessary to form a clamp portion 136 through which the two lower straps 202 of the mask 2 pass. Therefore, in the protective face shields 1-19, the portion provided for forming the clamp portion 136 through which the two lower straps 202 of the mask 2 pass can be omitted, thereby reducing the area of ​​the membranes 101-19. Thus, as described later, various effects (e.g., weight reduction) can be achieved by reducing the area of ​​membranes 101-19.

[0337] Furthermore, in the protective face shield 1-19 of the nineteenth embodiment, the clamp 136 does not engage with the strap 202. Therefore, when the strap 202 passes through the clamp 136, the clamp 136 can move relative to the strap 202 in the direction in which the strap 202 passes. Therefore, compared with the case where the clamp 136 engages with the strap 202 (for example, in the sixteenth to eighteenth embodiments described above), it is easier to adjust the positional relationship between the protective face shield 1-19 and the mask 2, making it easier to attach and detach the protective face shield 1-19 relative to the mask 2, and it is also easier to adjust the distance between the protective face shield 1-19 and the face. On the other hand, compared with the case where the clamp 136 engages with the strap 202, it is possible that the protective face shield 1-19 may shift or tilt during use. In particular, since the protective face shield 1-19 is supported by only a total of two straps 202, it may be difficult to stably hold and fix the protective face shield 1-19.

[0338] Therefore, as described above, on one side of the protective face shield 1-19 in the left-right direction, two clamps 136 are formed at intervals in the left-right direction, and the upper strap 202 of the mask 2 passes through these two clamps 136. Thus, the protective face shield 1-19 is supported at four points by the two upper straps 202 of the mask 2. Therefore, during use, the protective face shield 1-19 can be stably held and fixed to the mask 2, and the protective face shield 1-19 can be more easily attached and detached relative to the mask 2. Furthermore, when the number of clamps 136 formed on one side of the protective face shield 1-19 in the left-right direction is three or more, the protective face shield 1-19 is supported at six or more points by the two upper straps 202 of the mask 2 during use, achieving the same effect as described above.

[0339] As explained above, in the protective face shield 1-19 of the nineteenth embodiment, the protective face shield 1-19 is supported only by two straps 202 on the upper side of the mask 2, and each strap 202 passes through two clamps 136 without engaging with the clamps 136. This reduces the area of ​​the left and right sides of the protective face shield 1-19 used to attach it to the mask 2, thus reducing the area of ​​the membrane 101-19. Furthermore, during use, the protective face shield 1-19 can be stably held and fixed to the mask 2, and it is easier to attach and detach the protective face shield 1-19 relative to the mask 2.

[0340] As described above, the protective face shield 1-19 according to the nineteenth embodiment can achieve various effects associated with the reduction in the area of ​​the membrane 101-19. For example, since the protective face shield 1-19 can be made lighter, the overall weight of the protective equipment worn by the user can be reduced. Therefore, user fatigue can be reduced, and the wearing comfort can be improved. In addition, there is no feeling of heavy equipment, which can also create a good impression from the surroundings. In addition, for example, the contact area (close contact) between the protective face shield 1-19 and the user's face can be reduced, thus improving the wearing comfort. In addition, for example, in the manufacturing process of the protective face shield 1-19, when multiple protective face shields 1-19 are cut from the membrane material, the efficiency of the cutting process (the number of sheets manufactured per unit area) can be improved. Therefore, a cheaper protective face shield 1-19 can be provided, productivity can be improved, and manufacturing becomes easier.

[0341] Furthermore, according to the nineteenth embodiment of the protective face shield 1-19, compared to the case where the clamp 136 engages with the strap 202 (for example, the sixteenth to eighteenth embodiments described above), it is not necessary to arrange the membrane 101-19 around the variable portion 133 (for example, the two sides of the variable portion 133). Therefore, the design freedom of the protective face shield 1-19 can be increased, and a protective shield shape with excellent design can be designed.

[0342] Furthermore, according to the protective face shield 1-19 of the nineteenth embodiment, when the strap 202 passes through the clamp 136, the clamp 136 can move relative to the strap 202 in the passing direction of the strap 202, thus allowing adjustment of the front-to-back gap between the mask 2 and the protective face shield 1-19. Therefore, it is possible to suppress blurring of the protective face shield 1-19 due to the user's exhalation, maintaining good vision. Additionally, it is possible to prevent contact between the user's glasses and the protective face shield 1-19. Furthermore, as described above, during use, the protective face shield 1-19 is supported at four or more points by the two straps 202 on the upper side of the mask 2; therefore, when adjusting the front-to-back gap between the mask 2 and the protective face shield 1-19, the protective face shield 1-19 can be stably held and fixed to the mask 2.

[0343] Furthermore, in the protective face shield 1-19 of the nineteenth embodiment, as described above, two variable parts 133 are formed at intervals in the left-right direction on one side of the protective face shield 1-19. Therefore, as Figure 35 As shown, on one side of the protective face shield 1-19 in the left-right direction, a finger hook notch 137 is formed between two adjacent variable parts 133. The finger hook notch 137 is a notch formed between two adjacent variable parts 133, extending upwards from the lower end of the protective face shield 1-19. Figure 35 In the example shown, the upper end of the finger hook notch 137 is curved, but the shape of the finger hook notch 137 is not limited to this example; for example, it could also be rectangular. The user's finger passes through the finger hook notch 137. During use, by moving the finger with it passing through the finger hook notch 137, the user can more easily adjust the positional relationship between the protective face shield 1-19 and the mask 2. Furthermore, when the number of variable parts 133 formed on one side of the protective face shield 1-19 in the left-right direction is three or more, forming two or more finger hook notches 137 on one side of the protective face shield 1-19 in the left-right direction can achieve the same effect as described above.

[0344] Furthermore, in the protective face shields 1-19 of the nineteenth embodiment, such as Figure 35 As shown, a nose pad notch 138 is formed in the protective face shield 1-19 at the position where it contacts the user's nose. The nose pad notch 138 is formed by extending upward from the lower end of the central portion of the protective face shield 1-19. Figure 35 In the example shown, the nose pad notch 138 has a curved shape, but the shape of the nose pad notch 138 is not limited to this example; for example, it could also be approximately triangular. Figure 37As shown, when using the protective face shield 1-19, the user's nose is inserted into the nose pad notch 138. Therefore, the protective face shield 1-19 can be held and fixed more stably when it covers the user's face (mainly the eyes and the area around the eyes).

[0345] <Twentieth Implementation Method>

[0346] Reference Figure 38 and Figure 39 The protective face shields 1-20 of the twentieth embodiment of the present invention will be described.

[0347] Figure 38 This is a plan view showing the protective face shields 1-20. Figure 39 This is a schematic diagram showing the state of the variable part 139 (specifically, variable part 139L) before and after deformation, as described later. Specifically, Figure 39 This is a diagram of the protective face shield 1-20 as viewed from the rear (i.e., from the user's side).

[0348] The following description will take the example of attaching the protective face shield 1-20 to the ear loop mask 2 as an example. However, the protective face shield 1-20 of the twentieth embodiment, like the protective face shield 1-19 of the nineteenth embodiment, can be attached to or detached from the ear loop mask 2, as well as the tie-on mask 3 or the headband mask 4.

[0349] In the protective face shield 1-20 of the twentieth embodiment, similar to the protective face shield 1-19 of the nineteenth embodiment, the clamp portion 142 formed by the variable portion 139 (see reference) Figure 39 The strap 202 of the mask 2 does not engage with the strap 202. That is, when the strap 202 passes through the clamp 142, the clamp 142 can move relative to the strap 202 in the passing direction of the strap 202. In the twentieth embodiment, the difference from the nineteenth embodiment is that the number of variable portions 139 formed on one side of the protective face shield 1-20 in the left-right direction is one. However, in the twentieth embodiment, the number of clamp portions 142 formed on one side of the protective face shield 1-20 in the left-right direction is two, which is common to the nineteenth embodiment.

[0350] like Figure 38 As shown, a pair of variable parts 139 (specifically, variable parts 139L and 139R) are formed on the left and right sides of the protective mask 1-20 (specifically, the membrane 101-20 forming the protective mask 1-20). The variable parts 139 are deformable parts of the protective mask 1-20.

[0351] The variable portion 139 is formed extending downward from the protective face shield 1-20. The outer edge of the variable portion 139 is in a downward-protruding shape (e.g., approximately W-shaped). However, the shape of the outer edge of the variable portion 139 is not limited to this example; for example, it can be an arc shape, an ellipse shape, an arbitrary curved shape, or a square protruding shape. Each variable portion 139 can be bent upward along the bending line L11 disposed at the base end of each variable portion 139. The lateral length of the variable portion 139 is greater than the lateral length of the variable portion 133 in the nineteenth embodiment.

[0352] Here, in the protective face shield 1-20, adjacent to the variable part 139, two insertion parts 140 are formed at intervals in the left-right direction. Similar to the insertion part 134 of the nineteenth embodiment, the insertion part 140 is formed by a cut line (specifically, a U-shaped closed cut line). The shape of the insertion part 140 is the same as that of the insertion part 134 of the nineteenth embodiment and is not particularly limited. Furthermore, on the front end side of the variable part 139, two locking claws 141 are formed at intervals in the left-right direction. The locking claws 141, like the locking claws 135 of the nineteenth embodiment, are portions partially cut along an arc-shaped closed cut line curving towards the base end of the variable part 139. The shape of the locking claws 141 is the same as that of the locking claws 135 of the nineteenth embodiment and is not particularly limited.

[0353] like Figure 39 As shown, before the variable part 139 deforms, on one side of the protective face shield 1-20 in the left-right direction, the strap 202 of the mask 2 is positioned to pass behind the variable part 139 (e.g., variable part 139L). From this state, the variable part 133 is bent along the bending line L11 in a manner that clamps the strap 202. With the variable part 139 bent and inserted into the insertion part 140, the variable part 139 is locked into the insertion part 140 by the locking claw 141. Specifically, on the outer side (in Figure 39 The locking claw 141 (left side) locks onto the outer side (in the middle). Figure 39 The insertion part 140 (left side) is located on the inner side (in the middle). Figure 39 The locking claw 141 (right side) locks in place on the inside (in) Figure 39 The insertion part 140 (right side in the middle).

[0354] After the variable portion 139 is deformed, similar to the sixteenth to nineteenth embodiments, a clamp portion 142 is formed by the deformed variable portion 139 and the membrane 101-20, through which the strap 202 of the mask 2 can pass. In the twentieth embodiment, on one side of the protective mask 1-20 in the left-right direction, two clamp portions 142 are formed at intervals in the left-right direction by deforming one variable portion 139. Specifically, by deforming the outer side (on Figure 39The locking claw 141 (left side) locks onto the outer side (in the middle). Figure 39 The insertion portion 140 (on the left side) forms the outer side (in the middle). Figure 39 The hoop 142 (left side) passes through the inner side (in Figure 39 The locking claw 141 (right side) locks in place on the inside (in) Figure 39 The inner side is formed by the insertion portion 140 (on the right side) in the middle. Figure 39 The hoop 142 (right side in the middle). In addition, the shape of the hoop 142 is the same as that of the sixteenth to nineteenth embodiments, and there is no particular limitation.

[0355] The upper strap 202 of the mask 2 (specifically, strap 202-1 or strap 202-3) passes through two clamps 142. Specifically, the upper strap 202-1 of the strap 202 extending from the left side of the mask 2 passes through the two clamps 142 formed by the variable part 139L (i.e., the two clamps 142 formed on the left side of the protective face shield 1-20). The upper strap 202-3 of the strap 202 extending from the right side of the mask 2 passes through the two clamps 142 formed by the variable part 139R (i.e., the two clamps 142 formed on the right side of the protective face shield 1-20). Thus, the protective face shield 1-20 is fitted onto the mask 2. Like the protective face shield 1-19, the protective face shield 1-20 mainly covers the eyes and the area around the eyes on the user's face.

[0356] In addition, Figure 38 and Figure 39 In the example shown, the inner side (in) Figure 39 The distance between the insertion part 140 (right side) and the locking claw 141 is greater than that between the outer side (right side). Figure 39 The distance between the insertion portion 140 (left side) and the locking claw 141. However, the inner side (in...) Figure 39 The distance between the insertion part 140 (right side) and the locking claw 141 can also be greater than that on the outer side (in the middle). Figure 39The distance between the insertion portion 140 (left side) and the locking claw 141 is narrow, or it can be equal to that distance. Furthermore, the number of insertion portions 140 and locking claws 141 formed relative to one variable portion 139 can be three or more. In this case, the number of clamp portions 142 formed on one side in the left-right direction of the protective face shield 1-20 is three or more. Additionally, the number of insertion portions 140 formed relative to one variable portion 139 can be less than the number of locking claws 141 formed relative to one variable portion 139. Furthermore, the number of insertion portions 140 and locking claws 141 formed relative to variable portion 139L can be different from the number of insertion portions 140 and locking claws 141 formed relative to variable portion 139R. In this case, the number of clamp portions 142 formed on the left side of the protective face shield 1-20 is different from the number of clamp portions 142 formed on the right side of the protective face shield 1-20.

[0357] As described above, in the protective face shield 1-20 of the twentieth embodiment, similar to the protective face shield 1-19 of the nineteenth embodiment, the protective face shield 1-20 is supported only by two straps 202 on the upper side of the mask 2, and each strap 202 passes through two clamps 142 without engaging with the clamps 142. This reduces the area of ​​the membrane 101-20, thereby allowing the protective face shield 1-20 to be stably held and fixed to the mask 2 during use, and making it easier to attach and detach the protective face shield 1-20 relative to the mask 2.

[0358] Furthermore, in the protective face shields 1-20 of the twentieth embodiment, such as Figure 38 As shown, a recessed portion 143 is provided, which is recessed from the lower end of the central portion of the variable portion 139 toward the top. The recessed portion 143 is formed between two adjacent locking claws 141 in the variable portion 139. By forming such a recessed portion 143 in the variable portion 139, the area of ​​the membrane 101-20 can be reduced more effectively.

[0359] Furthermore, in the protective face shields 1-20 of the twentieth embodiment, such as Figure 38 As shown, a nose pad notch 144 is formed in the protective face shield 1-20 at the position where it contacts the user's nose. The position, shape, and purpose of the nose pad notch 144 are the same as those of the nose pad notch 138 in the protective face shield 1-19 of the nineteenth embodiment described above.

[0360] <Implementation Method 21>

[0361] Reference Figure 40 and Figure 41 The protective face shields 1-21 of the twenty-first embodiment of the present invention will be described.

[0362] Figure 40 This is a plan view showing the protective face shields 1-21. Figure 41 This is a schematic diagram showing the state of the variable part 145 (specifically, variable part 145L) before and after deformation, as described later. Specifically, Figure 41 This is a diagram of the protective face shield 1-21 viewed from the rear (i.e., from the user's side).

[0363] The following description will take the example of attaching the protective face shield 1-21 to the ear loop mask 2 as an example. However, the protective face shield 1-21 of the twenty-first embodiment, like the protective face shield 1-19 of the nineteenth embodiment and the protective face shield 1-20 of the twentieth embodiment, can be attached to or detached from the ear loop mask 2, as well as from the tie-on mask 3 or the headband mask 4.

[0364] In the protective face shield 1-21 of the twenty-first embodiment, similar to the protective face shield 1-19 of the nineteenth embodiment and the protective face shield 1-20 of the twentieth embodiment, the clamp portion 148 formed by the variable portion 145 (see reference) Figure 41 It does not engage with the strap 202 of the mask 2. That is, when the strap 202 passes through the clamp 148, the clamp 148 can move relative to the strap 202 in the passing direction of the strap 202. In the twenty-first embodiment, the difference from the nineteenth embodiment is that the number of variable parts 145 formed on one side of the protective mask 1-21 in the left-right direction is one, and the number of clamps 148 formed on one side of the protective mask 1-21 in the left-right direction is one.

[0365] like Figure 40 As shown, a pair of variable parts 145 (specifically, variable parts 145L and 145R) are formed on the left and right sides of the protective mask 1-21 (specifically, the membrane 101-21 forming the protective mask 1-21). The variable parts 145 are deformable parts of the protective mask 1-21.

[0366] The variable portion 145 is formed extending downward from the protective face shield 1-21. The outer edge of the variable portion 145 is in a downward-protruding shape (e.g., approximately U-shaped). However, the shape of the outer edge of the variable portion 145 is not limited to this example; for example, it can be an arc shape, an ellipse shape, an arbitrary curved shape, or a square protruding shape. Each variable portion 145 can be bent upward along the bending line L12 disposed at the base end of each variable portion 145. The lateral length of the variable portion 145 is greater than the lateral length of the variable portion 133 in the nineteenth embodiment.

[0367] An insertion portion 146 is formed adjacent to the variable portion 145 in the protective face shield 1-21, allowing the variable portion 145 to be inserted. Additionally, a locking claw 147 is formed on the front end side of the variable portion 145 to engage the variable portion 145 with the insertion portion 146. The shapes of the insertion portion 146 and the locking claw 147 are the same as in the nineteenth embodiment and are not particularly limited. Here, the lateral length of the insertion portion 146 and the locking claw 147 is greater than the lateral length of the insertion portion 134 and the locking claw 135 in the nineteenth embodiment.

[0368] like Figure 41 As shown, before the variable part 145 deforms, on one side of the protective face shield 1-21 in the left-right direction, the strap 202 of the mask 2 is positioned to pass behind the variable part 145 (e.g., variable part 145L). From this state, the variable part 145 is bent along the bending line L12 in a manner that clamps the strap 202. With the variable part 145 bent and inserted into the insertion part 146, the variable part 145 is locked in place by the locking claw 147. After the variable part 145 deforms, similar to the sixteenth to twentieth embodiments, a clamping part 148 is formed by the deformed variable part 145 and the membrane 101-21, through which the strap 202 of the mask 2 can pass. The upper strap 202 of the mask 2 (specifically, strap 202-1 or strap 202-3) passes through the clamping part 148. Furthermore, the shape of the clamping part 148 is similar to that of the sixteenth to twentieth embodiments and is not particularly limited.

[0369] Specifically, the upper strap 202-1 of the strap 202 extending from the left side of the mask 2 passes through a clamp 148 formed by the variable part 145L (i.e., a clamp 148 formed on the left side of the protective face shield 1-21). The upper strap 202-3 of the strap 202 extending from the right side of the mask 2 passes through a clamp 148 formed by the variable part 145R (i.e., a clamp 148 formed on the right side of the protective face shield 1-21). Thus, the protective face shield 1-21 is fitted onto the mask 2. Like the protective face shields 1-19 and 1-20, the protective face shield 1-21 primarily covers the eyes and the area around the eyes on the user's face.

[0370] In addition, Figure 40 and Figure 41 In the example shown, the distance between the insertion part 146 and the locking claw 147 is on the inside (in) Figure 41 The middle is the right side) compared to the outer side (in Figure 41 The width is on the left side. However, the distance between the insertion part 146 and the locking claw 147 can also be on the inner side ( Figure 41 The middle is the right side) compared to the outer side ( Figure 41 The middle (left side) is narrow, or they can be equal.

[0371] As described above, in the protective face shield 1-21 of the twenty-first embodiment, unlike the protective face shield 1-19 of the nineteenth embodiment, the number of clamps 148 formed on one side in the left-right direction of the protective face shield 1-21 is one, not two. Therefore, the protective face shield 1-21 is supported at two points by the two straps 202 on the upper side of the mask 2.

[0372] Here, the clamp portion 148 is formed by the locking claw 147 locking onto the insertion portion 146. As described above, the length of the locking claw 147 and the insertion portion 146 in the left-right direction is longer than the length of the locking claw 135 and the insertion portion 134 in the left-right direction in the protective face shields 1-19. Therefore, the length of the clamp portion 148 in the left-right direction is longer than the length of the clamp portion 136 in the left-right direction in the protective face shields 1-19. For example, the length of the clamp portion 148 in the left-right direction is 20 mm or more.

[0373] Therefore, in the protective face shield 1-21, the protective face shield 1-21 is supported at two points by the two straps 202 on the upper side of the mask 2. However, since the length of the hoop 148 in the left and right direction is long enough, the protective face shield 1-21 can be stably held and fixed to the mask 2 during use. Therefore, according to the protective face shield 1-21 of the twenty-first embodiment, similar to the protective face shield 1-19 of the nineteenth embodiment described above, the area of ​​the membrane 101-21 can be reduced. As a result, the protective face shield 1-21 can be stably held and fixed to the mask 2 during use, and the protective face shield 1-21 can be more easily attached and detached from the mask 2.

[0374] Furthermore, in the protective face shields 1-21 of the twenty-first embodiment, such as Figure 40 As shown, a nose pad notch 149 is formed in the protective face shield 1-21 at the position where it contacts the user's nose. The position, shape, and purpose of the nose pad notch 149 are the same as those of the nose pad notch 138 in the protective face shield 1-19 of the nineteenth embodiment described above.

[0375] The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to these embodiments. Obviously, those skilled in the art will be able to conceive of various modifications or alterations within the scope of the claims, and these modifications or alterations are also within the technical scope of the present invention.

[0376] In the above description, masks 2, 3, and 4 were described as masks assembled with the protective face shields of each embodiment, but the masks are not limited to the examples described above. For example, the masks assembled with the protective face shields of each embodiment can be made of various materials, in various sizes, and in various shapes.

[0377] Furthermore, the various embodiments described above can also be combined appropriately.

[0378] For example, in the second to twelfth embodiments, a slit line 102 is used as a mechanism for the strap of the mask to pass through and engage with the strap. However, the slit line 102 in the second to twelfth embodiments can also be replaced by the slit line 113 of the thirteenth embodiment, the slit line 114 of the fourteenth embodiment, the slit line 115 of the fifteenth embodiment, the variable part 116 of the sixteenth embodiment, the variable part 121 of the seventeenth embodiment, the variable part 127 of the eighteenth embodiment, the variable part 133 of the nineteenth embodiment, the variable part 139 of the twentieth embodiment, or the variable part 145 of the twenty-first embodiment. In addition, the mechanism for engaging the strap in the second to twelfth embodiments can also be provided in multiple pairs, as in the eleventh and twelfth embodiments.

[0379] Additionally, for example, in each embodiment, the notch 103 of the second embodiment, the through hole 104 of the third embodiment, the bend 105 of the fourth embodiment, the bend 107 of the fifth embodiment, the bend lines L3 and L4 of the sixth embodiment, the anti-reflective layer 109 of the seventh embodiment, the through hole 111 of the eighth embodiment, the mark of the ninth embodiment, and part or all of the assembly structure 112 of the tenth embodiment may be added.

[0380] Symbol Explanation

[0381] 1-1~1-21 Protective face shield; 2, 3, 4 Mask; 101-1~101-21 Membrane; 102 Cut line; 102a, 102b Engaging parts; 103 Notch; 104 Through hole; 105 Bending part; 107 Bending part; 109 Anti-reflective layer; 110 Base layer; 111 Through hole; 112 Assembly structure; 113 Cut line; 113a, 113b Engaging parts; 114 Cut line; 114a, 114b Engaging parts; 115 Cut line; 115a Engaging part; 116 Variable part; 118 Insertion part; 119 Locking claw; 120 Hoop; 121 Variable part; 123 Insertion part; 124 Locking claw; 125 Hoop; 126 127 Notch; 129 Variable part; 129 Insertion part; 130 Locking claw; 131 Hoop; 132 Assembly structure; 133 Variable part; 134 Insertion part; 135 Locking claw; 136 Hoop; 137 Notch for finger hook; 138 Notch for nose pad; 139 Variable part; 140 Insertion part; 141 Locking claw; 142 Hoop; 143 Recess; 144 Notch for nose pad; 145 Variable part; 146 Insertion part; 147 Locking claw; 148 Hoop; 149 Notch for nose pad; 202 Strap; 302 Strap; 402 Strap; L1~L12 Bending lines.

Claims

1. A protective face shield, which is removable from a mask and covers at least the eyes of the face of a user wearing the mask. The protective face shield comprises a flexible and light-transmitting membrane. At least one pair of slits are formed on the left and right sides of the protective face shield, allowing the straps of the face shield to pass through. The cut line has an engaging portion that engages with the strap passing through the cut line.

2. The protective face shield according to claim 1, wherein the engaging portion restricts the movement of the strap in two directions: the direction in which the strap passes through the cut line and the direction along the cut line.

3. The protective face shield according to claim 1 or 2, wherein the membrane on both sides of the engaging portion of the cut line is used to clamp the strap passing through the cut line.

4. The protective face shield according to any one of claims 1 to 3, wherein the cut line is a closed cut line that does not intersect with the outer edge of the protective face shield but is enclosed within the inner side of the protective face shield. The engaging portions are formed at both ends of the closed-type cut line. Two straps extending from one side of the mask in the left-right direction pass through one of the closed-type cut lines formed on one side of the protective face shield in the left-right direction. The two straps engage with the two engaging portions formed at both ends of the closed cut line, respectively.

5. The protective face shield according to claim 4, wherein multiple pairs of closed-type slits are formed on the left and right sides of the protective face shield. The spacing between the paired closed-type incision lines varies for each pair.

6. The protective face shield according to any one of claims 1 to 3, wherein the cut line is an open cut line with one end intersecting the outer edge of the protective face shield and the other end disposed on the inner side of the protective face shield. The engaging portion is formed at the other end of the open-type cut line. On the left and right sides of the protective mask, two pairs of open cut lines are formed side by side in the vertical direction. Two straps extending from one side of the mask in the left-right direction pass through two open cut lines formed on one side of the protective face shield in the left-right direction, respectively. The two straps engage with the two engaging portions formed at the other end of the two open-cut lines, respectively.

7. The protective face shield according to any one of claims 1 to 6, wherein the engaging portion is the portion where the cut line is formed in a serrated shape.

8. The protective face shield according to any one of claims 1 to 6, wherein the engaging portion is the portion of the cut line that has branches.

9. The protective face shield according to any one of claims 1 to 6, wherein the engaging portion is the portion of the curved cut line.

10. A protective face shield, which is removable from a mask and covers at least the eyes of the face of a user wearing the mask. The protective face shield comprises a flexible and light-transmitting membrane. At least one pair of deformable parts are formed on the left and right sides of the protective mask. The variable part deforms to form a hoop through which the straps of the mask can pass.

11. The protective face shield according to claim 10, wherein the variable portion is deformable because it is partially cut along a slit line formed in the protective face shield. The hoop engages with the strap passing through the hoop.

12. The protective face shield according to claim 10, wherein on one side of the protective face shield in the left-right direction, two or more of the clamp portions are formed at intervals in the left-right direction by deformation of the variable portion. The upper strap of the mask passes through the two or more clamps.

13. The protective face shield according to claim 12, wherein on one side of the protective face shield in the left-right direction, two or more of the variable parts are formed at intervals in the left-right direction. The two or more hoop portions are formed by deforming the two or more variable portions.

14. The protective face shield according to claim 12 or 13, wherein when the strap on the upper side of the face shield passes through the two or more clamps, the clamps are movable relative to the strap in the direction in which the strap passes.

15. The protective face shield according to any one of claims 10 to 14, wherein an insertion portion consisting of a cut line is formed in the protective face shield at a position adjacent to the variable portion. The hoop is formed by inserting the variable part into the insertion part.

16. The protective face shield according to claim 15, wherein the variable portion is provided with a locking claw for locking the variable portion into the insertion portion.

17. The protective face shield according to any one of claims 1 to 16, wherein a notch is formed at a position opposite to the user's respiratory organs.

18. The protective face shield according to any one of claims 1 to 16, wherein a through hole is formed in the protective face shield at a position opposite to the user's respiratory organs, or at a position to the side or below the position opposite to the respiratory organs.

19. The protective face shield according to any one of claims 1 to 18, wherein a bending portion is formed at a position opposite to the user's nose or at a position opposite to a portion lower than the nose, which is capable of bending toward the user's face.

20. The protective face shield according to any one of claims 1 to 19, wherein a bending portion is formed at a position opposite to the user's forehead or front of the head, which is capable of bending toward the user's face.

21. The protective face shield according to any one of claims 1 to 20, wherein a bending portion is formed at a position opposite to the user's chin or at a position opposite to a portion lower than the chin, which is capable of bending toward the user's face.

22. The protective face shield according to any one of claims 1 to 21, wherein a fold line is provided between the frontal and side portions of the user's face in the protective face shield. The portion of the side side can be bent along the bend line relative to the portion of the front side.

23. The protective face shield according to any one of claims 1 to 22, wherein at least one side of the protective face shield is provided with an anti-reflective layer.

24. The protective face shield according to claim 23, wherein the anti-reflective layer is a micro-uneven structure with a spacing below the wavelength of visible light.

25. The protective face shield according to any one of claims 1 to 24, wherein the total light transmittance of the protective face shield is 94.0% or higher.

26. The protective face shield according to any one of claims 1 to 25, the protective face shield having an assembly structure capable of being assembled into a shape that tapers at the front end as it moves away from the user's face.

27. A protective face shield with a mask, comprising the protective face shield according to any one of claims 1 to 26 and a mask for the protective face shield to be freely assembled and disassembled.

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