JP6806458B2 - mask - Google Patents

Description

The present invention relates to a mask that can be used comfortably for a long period of time by preventing fogging of the spectacle lens that occurs when the mask is worn with spectacles.

Masks are used to remove pathogenic bacteria and viruses, to remove pollen and house dust that cause allergies, and to remove dust outdoors and at work sites. However, when used with eyeglasses, the wet exhaled air leaking between the nose and the mask causes the lens to become cloudy, deteriorating visibility. In particular, lens fogging tends to occur in winter. Therefore, in order to prevent fogging of the spectacle lens, a thin film piece or cushioning material is attached horizontally to the upper part of the mask body, and in combination with a nose piece that is plastically deformed to further improve the fit, exhaled air leaks from between the nose and the mask. Proposals have been made to prevent this.

Specifically, as described in Patent Document 1, a horizontally long square cushioning material aimed at improving the fit between the face and the mask and a thin metal plate nose piece are laminated directly under the cushioning material on the face. A technique has been proposed in which the gap between the mask and the mask is reduced to prevent fogging of the lens due to exhalation. However, with a uniform horn-shaped cushioning material, it is difficult to preferably adhere to the face, which has various uneven surfaces depending on the individual, and even if it is suppressed with a nose piece, it is difficult to improve the wearability on the face due to the resilience of the cushioning material. Met. As a result, the gap between the face and the mask widened during use, which also caused lens fogging due to moist exhalation. In addition, holding down with the nose piece gives the wearer a feeling of oppression and is not comfortable.

Further, as described in Patent Document 2, an anti-fog mask is known in which a thin film piece such as nylon fiber or polyester fiber cloth having the same shape on the left and right is attached to the inner upper edge of the mask body with the central axis interposed therebetween. However, since the thin film pieces are separated in the center, the resilience is weak and the compatibility with the face is insufficient. As a result, moist exhaled air leaked and clouded the glasses, and the contact area with the face was wide, resulting in lack of comfort. Further, in the invention described in Patent Document 3, an attempt is made to improve the fit and reduce the gap by attaching a cushioning material having a chevron-shaped unevenness matching the shape of the nose in order to fill the gap between the face and the mask. ing. However, even with this configuration, it is difficult to adapt to individuals with various uneven surfaces only by the form and elasticity of the cushioning material, and it has not been possible to prevent fogging of the lens for all wearers. In addition, since the wide cushioning material comes into contact with the face over a large area, it gives a feeling of oppression and cannot be used comfortably for a long period of time. Patent Document 4 is an invention designed so that a folded portion provided so as to protrude inward from the surface layer portion of the mask body fits the nose and face, but a soft surface layer material of the mask body is used for the folded portion. Therefore, sufficient resilience cannot be obtained, and it is not possible to follow a complicated curved surface of the face. This creates a gap between the mask and the face, causing the glasses to become cloudy. Further, as in the technique shown in other publicly known documents, since it comes into contact with the face over a large area, there is a feeling of oppression and the comfort is poor. Patent Document 5 has a thin rectangular exterior base portion and an elastic bent piece portion extending from the exterior base portion on the outer surface of the mask body, and the elastic bent portion is bent inside the mask to fit the face. We are proposing to improve the sex. However, with this means, the bending angle is not sufficient and appropriate resilience cannot be obtained, and since it is not possible to follow the complicated curved surface of the face, a gap is generated between the face and the elastically bent portion. For this reason, the wet exhaled breath is allowed to pass through to cloud the glasses, and the elastically bent portion has a large contact area with the face, which causes a feeling of oppression and cannot be comfortably worn for a long period of time.

Patent Document 6 relates to the invention of the applicant of the present application, and since the free end portion of the sheet-shaped exhaled breath blocking material is firmly adhered to the face with a nose piece, it has an anti-fog effect, but the amount of contact with the face is large. Since there are many, there is a feeling of oppression, and there remains the problem that it is not yet optimal for long-term wearing. None of the prior art examples have yet solved the problem of comfortable long-term use while preventing fogging of the glasses.

Jikkenhei 6-15648 Registered Utility Model No. 3114559 Japanese Unexamined Patent Publication No. 2008-148984 Japanese Unexamined Patent Publication No. 2009-11709 JP-A-2009-66382 Japanese Unexamined Patent Publication No. 2015-181751

The present invention solves the above-mentioned conventional problems, and a mask that can be used comfortably for a long time without giving a feeling of oppression while preventing dew condensation on the lens due to leakage of moist exhaled breath by making the gap between the face and the mask as small as possible. It is intended to be provided.

In the present invention, in order to solve the above problems, a mask is provided with elastic cords for ear hooks on both sides, and a rectangular sheet having resilience is folded in a mountain on the upper surface side of the mask body on the wearer side. A means was used in which the front and back surfaces of the central portion were folded in half, at least the open end sides were joined, and the back surface side of the exhalation blocking material provided with arch portions on both sides of the central portion was fixed. Since the exhaled breath blocking material itself has resilience, if it is folded in half by mountain fold and the front and back of the central part are joined, arch parts will appear on both sides due to the repulsive force. Then, since this arch portion follows the unevenness of the face surface and comes into close contact with each other, it prevents exhaled breath from leaking.

Further, as an exhalation blocking material, a means for joining the front and back surfaces of the central portion and further joining the front and back surfaces of both end portions to form a stable arch portion was also used. In order to realize a favorable state for the resilience of the exhaled breath blocking material, a means of using a foam sheet as the material was also used. Furthermore, in order to prevent the leakage of exhaled air, the foam sheet is a closed cell foam sheet.

To a preferable state the resilience, while 80~250mm exhalation blocking material softness in cantilever method, bending resilience is a material having a resilience of 0.7~7mN Gurley bending resistance, foaming As a physical characteristic of the body, a means of adopting a foam having an apparent density of 15 to 120 kg / m ³ was also selectively used. In order to realize the arch portion stably, the joint area between the front and back surfaces of the exhaled breath blocking material was set to 5 to 50 mm ² .

By using the mask of the present invention, the gap between the face and the mask is almost completely eliminated, and the lens is not fogged by moist exhaled breath. In particular, even in a harsh environment such as winter, it is possible to prevent the cold lens from condensing due to exhalation, so that the field of vision is not obstructed. In addition, it is comfortable without getting tired even if it is used for a long time, and safety can be ensured by ensuring a front view.

Explanatory drawing which shows the place where the mask of this invention was attached Top view showing one embodiment of the mask of the present invention Perspective view showing an example of the exhalation blocking material of the present invention. Same, perspective view Top view showing one of the procedures for providing the exhalation blocker on the mask of the present invention. Top view showing an example of length adjustment of the telescopic string adopted in this invention. Top view showing a modification of the breath blocking material in the present invention. Perspective view showing another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view showing a user wearing the mask of the present invention, where 1 is a mask main body and 2 is a sheet-shaped exhalation blocking material which is an important member of the present invention. It is provided along the upper surface on the side that contacts the wearer, that is, the inner surface side. FIG. 2 is a plan view of the mask body 1 as viewed from the back side. The mask body 1 is composed of a flat surface portion 3 and an elastic cord 4, but these are not characteristic configurations, and a widely known mask is used. It is possible to adopt. The exhaled breath blocking material 2 has a three-dimensional structure, and an appropriate material is selected to realize the three-dimensional structure. As the material of the breath blocking material, a non-foam sheet or a foam sheet is used. The foam sheet is preferably suitable as the material, considering that it does not have appropriate exhalation permeability and the lightness, thickness, softness, and resilience can be easily changed. The foam sheet has open cells and closed cells, but closed cells are more preferable because they block the passage of exhaled breath. As the material to be used, polyethylene-based, urethane-based, ethylene-propylene rubber-based, cellulose-based, natural rubber, synthetic rubber and the like can be widely used. The apparent density is preferably 15 to 120 kg / m ³ in accordance with JIS K6767 because of its lightness. The thickness is preferably 0.5 to 3.5 mm in accordance with JIS L1096 from the viewpoint of fit. The softness is preferably 80 to 250 mm based on the JIS L1096 cantilever method because it is easy to follow the face. The bending resilience is preferably 0.7 to 7 mN based on the JIS L1096A method Garley stiffness from the viewpoint of fit and comfort, but particularly preferably 1 to 5 mN. Bending resilience is an important property, and 0.7 mN or less is appropriate. If it exceeds 7 mN, the flexible deformability is impaired, exhaled breath leaks, and comfort is impaired, resulting in a feeling of fatigue, which is not preferable.

3 and 4 are perspective views showing the exhaled breath blocking material 2 independently. FIG. 3 is a view of the exhaled breath blocking material 2 from diagonally below inside the mask, and FIG. 4 is similarly viewed from diagonally above. The place is shown. More specifically, the rectangular material is folded in half in a mountain fold shape, the back surface side 5 is fixed to the mask body 1, the front surface side 6 is folded back, and the front and back surfaces are folded at both end joints 7 and 7 and the central joint 8. It is integrated by welding. As the welding method, it is sufficient to adopt a known means such as ultrasonic welding. As shown in FIG. 5, the means for fixing the back surface side to the mask body 1 is to partially attach the lower half corresponding to the back surface side of the rectangular exhaled breath blocking material 2 to the mask body 1 at welding points 9 to 9. It sticks so that it does not come off. Then, after that, the surface side 6 is folded back and the both end joints 7.7 and the central joint 8 are welded as described above. Since the exhaled breath blocking material 2 only needs to be firmly adhered to the mask body 1, it is not welded as shown in the embodiment, but an adhesive is provided on the back surface side 5 and attached to the mask body 1. You may. Since the exhaled breath blocking material 2 uses a material having resilience, when the front and back joints 7 and 7 and the central joint 8 are integrated on the front and back sides, the arch is caused by the resilience as shown in FIG. The parts 10 and 10 appear, and the arch parts 10 are fitted to the unevenness of the surface of the face and are attached without forming a gap.

The shape of the exhaled breath blocking material 2 is related to the size of the mask body 1, but the length is 80 mm to 190 mm, and the width is basically a rectangular shape of 20 mm to 45 mm. Even if the rectangle becomes curved, it does not interfere with the present invention. The shape of the arch portion 10 which is the surface-side free end portion that appears by folding the exhaled breath blocking material 2 in half is preferably arched to the left and right from the central portion that hits the nose. This arch depends on the length, width, shape and material between the joints. It goes without saying that the maximum height of the arch depends on the size and shape of the face, but it is preferably 8 to 35 mm from the lower surface at the maximum. If the maximum height of the arch is 8 mm or less or 35 mm or more, a gap is formed between the arch and the face, causing exhalation leakage, and the comfort of fitting with the face is also lost. The maximum height of the arch is defined as from the mask body to the upper surface of the arch portion 10 which is the free end portion of the exhaled breath blocking material 2. The length of the arch portion 10 of the exhaled breath blocking material 2 is adjusted by the elastic cord 4 so as to fit the face linearly along the face. As an adjustment method, there are a method of tying a knot, using a clip, and using an adjustment component 11 as shown in FIG. The length of the adjusting component 11 is adjusted by passing the telescopic string 7 through the hole and hooking it on the protrusion. As for the relationship between the elongation of the elastic cord 4 and the generated stress, it is preferable that the stress generation is gentle with respect to the elongation. As the material, an elastic cord containing polyurethane fiber or rubber fiber is preferable. In the configuration of the present embodiment, there is no nose piece having plastic deformability that strongly presses against the face, and it can be used comfortably for a long period of time without blocking exhalation and fogging the spectacle lens, and further reduces stress during wearing. So I don't feel tired. The configuration of the mask main body 1 is not particularly limited, and for example, a configuration in which the front and back fabrics and a filter material are formed in the center and joined on all sides may be adopted, or a non-woven fabric may be adopted as the material. In a flat mask, the mask body 1 may be pleated. As the bonding of the exhaled breath blocking material 2 to the mask body 1, mechanical bonding using ultrasonic welding, heat welding, an adhesive, double-sided tape, sewing, a hook-and-loop fastener, or the like is used as described above.

By the way, since the joining method affects the arch shape and the arch height, it is necessary to appropriately set the joining position, the joining area, the joining shape, and the like. As shown in FIG. 5, the exhalation blocking material 2 is first joined to the mask body 1 before being folded in half, and then folded in half so that the arch portion 10 which is a free end repels the exhalation blocking material 2. 2 is joined by the central joint portion 8 and the both end joint portions 7 and 7, which are both end joint portions. The length, width, and position of the central joint 8 and the joints 7.7 at both ends also affect the arch shape. The joining position of the central joining portion 8 may be joined from the bending line 12, but it is preferable to join from a place separated from the bending line from the viewpoint of forming an appropriate arch. Specifically, it is preferable that the central joint portion 8 is separated from the bending line 12 by 20% or more of its width and is joined toward the arch portion 10. The joints 7.7 at both ends of the exhaled breath blocking material 2 may be joined from the bending line 12 to the end of the arch portion 10, but it is more preferable that the joints 7 and 7 are separated by 20% or more as in the central joint 8. The joint width is preferably 1 to 5 mm in consideration of the joint strength. As for the joining shape, full surface joining, point joining, point joining can be repeated, and the like. The joint area is preferably 5 to 50 mm ² .

In the present invention, it is important that the arch portion 10 of the exhaled breath blocking material 2 appropriately fits the surface of the wearer's face, but as a modification of the above embodiment, the embodiment of FIG. 2 is shown in FIG. From the configuration of the form, the joint portion of both end joint portions 7 and 7 may be omitted and only the joint portion of the central joint portion 8 may be used. In this case, the left and right end joints of the exhaled breath blocking material 2 are free ends, but since the material used for the exhaled breath blocking material 2 has resilience, the exhaled breath blocking material of the embodiment shown in FIG. And the basic action and effect do not change.

FIG. 8 shows another embodiment of the present invention in which the mask body 20 is three-dimensionally configured. Then, the exhaled breath blocking material 21 was provided by being folded in half inside the upper edge portion of the mask main body 20, and was joined to the mask main body 20 by the central joint portion 22 and the both end joint portions 23 and 23. As a result, arches 24 and 24 were created on the left and right sides of the central joint 22. Then, 25.25 elastic cords for ear hooks are joined to the mask body 20 to form the mask body 20. In some cases, using the adjusting component for adjusting the telescopic string 25 is the same as in the previous embodiment. The mask body 20 is configured by joining members having the same shape on the left and right at a central joint portion 22. More specifically, it consists of front and back fabrics and a middle layer filter. In order to join the exhaled breath blocking material 21 to the mask main body 20 and fold it in half to join, the shape of the mask main body 20 and the shape of the expiratory blocking material 21 are important. It is preferable in terms of accuracy that the exhalation blocking material 21 is applied to the mask body 20 and joined to the mask body 20 before being folded in half. After that, it is folded in half and the central joint portion 22 and the both end joint portions 23 and 23 are joined to the mask main body 20, which is preferable in terms of work. In order to prevent the spectacle lens from fogging and to be worn comfortably for a long time, it is necessary to linearly fit the upper free end portion of the sheet-shaped exhalation blocking material 21 folded in half, that is, the arches 24 and 24, to the face. .. The position where the exhaled breath blocking material 21 is folded in half can be anywhere in the width direction, but preferably the vicinity of the central portion is optimal for fit and comfort.

For this reason, the material, shape, and pressing pressure on the face of the sheet-shaped exhaled breath blocking material 21 are important factors as in the previous embodiment. Therefore, it goes without saying that the material and characteristics of the exhaled breath blocking material 21 applied to the embodiment shown in FIG. 8 are also required to satisfy the conditions shown in the previous embodiment.

Hereinafter, the experimental results of the mask of the present invention manufactured by selecting the composition, the appropriate material, the size, etc. described above will be shown.
(Example 1)
A mask was created according to the previous embodiment shown in FIG. Specifically, 20 g / m ² of spunbonded non-woven fabric was used for the front and back surfaces of the flat mask body, and 15 g / m ^{2 of} melt-blown non-woven fabric was used for the middle layer. The size is a rectangle (rectangle) having a horizontal length of 175 mm and a vertical length of 90 mm, and known pleats are provided in the horizontal direction. The sheet-shaped exhaled breath blocking material was a closed-cell ethylene vinyl acetate copolymer foam sheet having a thickness of 1.8 mm, an apparent density of 80 kg / m ³ , a softness of 150 mm, and a bending resilience of 2 mN. The dimensions and shape are 150 mm in length and 30 mm in width, and after the lower side of the exhaled breath blocking material folded in half is spot-welded to the mask body at four locations with a width of 2 mm and a length of 5 mm as shown in FIG. , The width was folded in half from the center to form a center joint and a joint at both ends. The folded line folded in half was welded and joined to the inside of the mask body at a position 5 mm from the end of the mask body as shown in the embodiment. The method of joining the exhaled breath blocking material folded in half was that the two ends were welded with a width of 2 mm and a length of 8 mm and a joining area of 16 mm ² to the free end. The joints at both ends were left unwelded by about 6 mm in the bending line direction. The joint at both ends was opened 1 mm from the end of the exhaled breath blocking material folded in half to the end of the mask body. The central joint was a welded portion having a width of 2 mm and a length of 6 mm and a bonding area of 12 mm ² , and was welded from a position 8 mm away from the bending line to the free end end. The maximum height of the arch was 21 mm. The length of the shrink string can be adjusted with the adjusting parts.
After wearing the mask having such a configuration, the glasses were left in a refrigerator at 5 ° C. for 1 minute and then taken out into a room at 24 ° C. to evaluate the degree of cloudiness. As a result, no fogging of the glasses was observed after wearing. After that, the mask was worn at an outside air temperature of 2 to 8 ° C. for 3 hours for evaluation, but no fogging of the glasses was observed. In addition, there was no feeling of oppression in the feeling of use, and it was comfortable and did not get tired.

(Example 2)
A mask was made according to the second embodiment shown in FIG. As a specific configuration of the three-dimensional mask, 25 g / m ² of spunbonded non-woven fabric was used for the front and back surfaces, and 17 g / m ² of electret melt blown non-woven fabric was used for the middle layer. As the exhaled breath blocking material, a closed-cell polyethylene-based foam sheet having a thickness of 1.5 mm, an apparent density of 35 kg / m ³ , a softness of 140 mm, and a bending resilience of 1.5 mN was used. The dimensions and shape are 140 mm in length and 30 mm in width, and the four parts of the bottom of the exhaled breath blocking material folded in half are welded to the mask body with a width of 2 mm and a length of 5 mm (joint area 10 mm ² ), and then folded in half. Welded to the mask body at the central joint and the joint at both ends. The folded line folded in half was welded and joined to the mask body 5 mm inward from the edge of the mask body. The central joint was 2 mm wide and 6 mm long (joint area 12 mm ² ), and the joint at both ends was 2 mm wide and 7 mm long (joint area 14 mm ² ) and was welded from the end of the free end. There was a distance from the ends of the central joint and the joints at both ends to the fold line of the fold, the central contact was 7 mm, the joint at both ends was 6 mm, and the fold line showed a gentle bend. The maximum arch height was 19 mm. For the mask pressing pressure on the face, the length of the contraction cord was adjusted with the adjusting part.
After wearing the mask having such a configuration, the glasses were left in a refrigerator at 5 ° C. for 1 minute and then taken out into a room at 24 ° C. to evaluate the degree of cloudiness. As a result, no fogging of the glasses was observed after wearing. After that, the mask was worn at an outside air temperature of 1 to 7 ° C. for 2 hours for evaluation, but no fogging of the glasses was observed. In addition, there was no feeling of oppression and it was comfortable and did not get tired.

1 Mask body 2 Breath-blocking material 3 Flat surface 4 Telescopic string 5 Back side of breath-blocking material 6 Front side of breath-blocking material 7 Both sides joint 8 Central joint 10 Arch 11 Adjusting parts 20 Mask body 21 Breath-blocking material 22 Center Joint 23 Both sides joint 24 Arch 25 Telescopic string

Claims (1)

A mask with elastic cords for ear hooks on both sides. A rectangular sheet with resilience is folded in half in a mountain fold on the upper surface side of the mask body on the wearer side, and the front and back and both ends of the center part. By joining each of the front and back surfaces of the portion from a position away from the bending line of the sheet toward the open end side , three-dimensional arch portions are provided on both sides of the central portion due to the resilience. A mask characterized in that the back side of the blocking material is fixed.

Images