Water activity mask

Abstract

To improve the miniaturization, the portability, and the use safety of a mask.SOLUTION: A mask for a water activity includes two lenses, a waterproof sealed skirt, and a fastening device. The waterproof sealed skirt forms integrally two lens frames, a nose mask, and its rear edge. The two lens frames are independent individually. Each lens frame has an inner part. Each of the two lenses is fitted into the two lens frame in a waterproof state. The nose mask protrudes forward from between the two lens frames. Its rear edge sticks to the user face part. The inner part of the two lens frames can be adjacent to the two orbital bones of the user when the user puts on the mask using the fastening device.SELECTED DRAWING: Figure 2A

Description

Technical Field

[0001] The present invention relates to a mask for water activities, and particularly to a mask for water (including above water and underwater) activities such as swimming, snorkeling, free diving, bow fishing, etc., and also to a mask that usually covers the user's eyes and nose.

Background Art

[0002] Current masks for water activities generally include, for example, swimming goggles that cover only the eyes, snorkel masks that cover the eyes and nose simultaneously, general diving masks having a structure similar to that of snorkel masks, swimming goggles for training, masks for free diving and bow fishing, etc. Such masks can be roughly classified into two types: single-lens type and double-lens type.

[0003] For example, as shown in FIG. 1A, the single-lens mask 1a includes a lens 11a, a lens frame 13a, a waterproof seal skirt 15a, and a headband 17a. To assemble the single-lens mask 1a, the lens 11a, the waterproof seal skirt 15a, and the headband 17a must all be connected to the lens frame 13a. Also, as shown in FIG. 1B, the double-lens mask 1b includes two independent lenses 11b that separately cover the left and right eyes, a lens frame 13b, a waterproof seal skirt 15b, and a headband 17b. When assembling the double-lens mask 1b, the lenses 11b, the waterproof seal skirt 15b, and the headband 17b must also all be connected to the lens frame 13b. This is the same as the single-lens mask 1a. The difference is only that the central bridge portion of the single-lens mask 1a is formed by the direct and continuous connection of the lens 11a and the lens frame 13a, while the central bridge portion of the double-lens mask 1b is formed only by the lens frame 13b.

[0004] However, regardless of whether it is a single-lens mask 1a or a double-lens mask 1b, the lens area must protrude forward and be kept at a certain distance from the user's eyes in order to avoid the rigid lens frame or lens coming into contact with the bridge of the nose when worn. Therefore, in terms of field of view, the lens size must naturally be made large enough to ensure a sufficient field of view during water activities, otherwise it will be obstructed by the lens frame. In addition, to prevent distortion of vision, the left and right lenses must be connected by a rigid lens frame and / or lens to ensure unity between the two lenses. Otherwise, the left and right lenses will be subjected to water pressure, causing excessive relative displacement or warping, which will distort the user's vision underwater and ultimately cause dizziness.

[0005] Furthermore, in terms of waterproofing, taking the single-lens mask 1a as an example (although the same problem exists for the double-lens mask 1b), as shown in Figure 1C, the waterproof sealing skirt 15a must have a watertight rear edge 15a1. The rear edge 15a1 needs to be wide enough to form a waterproof ring surrounding the user's forehead, both sides of the cheekbones, and philtrum. However, in such a structure, as shown in Figure 1D, the area of ​​the lens frame 13a and lens 11a is relatively heavy and far from the user's eye UE. Therefore, structurally, a downward tensile force is generated, affecting the watertight effect of the waterproof sealing skirt 15a. In this case, the wall thickness of the waterproof sealing skirt 15a (especially the wall thickness on both sides and the top) needs to be increased so that the mask 1a can exhibit better wearing balance and stability.

[0006] Furthermore, facial shape and contours vary greatly depending on the user's age and race. In particular, the vertical difference between the upper nasal bone and the glabella is extremely large. To avoid this difference and prevent the central area of ​​the lens frame from contacting the glabella, the design must either push the area of ​​the lens frame 13a and lens 11a outward, or position the bridge area between the left and right lenses further upward to avoid the protruding glabella (see Figure 1E). However, these designs are clearly disadvantageous for miniaturizing and lightening the mask.

[0007] Furthermore, as can be understood, due to the structural constraints mentioned above, breathing becomes impossible inside the mask covering the eyes and nose when freediving, bowfishing, or swimming training. Therefore, the user must inhale a sufficient amount of air, hold their breath, and then complete the necessary activity within a certain time. Also, if the volume inside the mask is too large, water pressure will compress the space inside the mask and press against the user's face. As a result, the user is often forced to exhale slightly to balance the pressure inside the mask. Thus, the sacrifice of held breath has a serious impact on the length of time the activity can be performed.

[0008] Furthermore, in the structure of a full-face mask, if the inside of the mask has an intake and exhaust structure that allows breathing, then, according to the tidal volume and negative pressure theory, if the volume inside the mask is too large, carbon dioxide will accumulate rapidly, which is a drawback and raises safety concerns. All of these problems stem from the mask being too large. Therefore, as can be inferred, the current design is clearly disadvantageous in terms of miniaturization, portability, and safety of use. [Overview of the project] [Problems that the invention aims to solve]

[0009] In light of the above, designing a water activity mask that can partially or completely solve the aforementioned problems has become a goal that the industry is striving to achieve with all its might. [Means for solving the problem]

[0010] One of the objectives of the present invention is to provide a water activity mask in which the left and right lens frames are substantially independent of each other, and their mounting positions correspond to the left and right orbital bones of the user, respectively, and the left and right lenses are also substantially independent of each other and correspond to the left and right eyes of the user, respectively. Furthermore, there is no rigid bridge member between the left and right lens frames, and a flexible waterproof sealing skirt plays the main role in connecting the left and right lens frames.

[0011] In terms of field of view, since the mask's lenses can come quite close to the eyes, a wide field of view can be obtained without making the lens size too large, and it is not obstructed by the lens frame. Furthermore, regarding the prevention of visual distortion, even without a rigid lens frame and a rigid bridge member, when the mask is subjected to water pressure, the left and right lens frames can come into direct contact with the user's left and right orbital bones. As a result, relative displacement or warping does not occur, and phenomena such as visual distortion and dizziness do not occur. In such a structure, the weight of the lens frame and lens area is greatly reduced, and the distance from the eyes is also greatly reduced, so the waterproof sealing skirt is not pulled by the lens frame or lens, and the burden of watertightness is naturally reduced. Therefore, in terms of waterproofing, the uppermost center of the waterproof sealing skirt of the present invention can be designed to extend downward to the user's glabella area (optimally within a range of 1 cm above or 1 cm below that). Moreover, since its soft material fits the height difference in that area for each user, a very good watertight effect can be provided without changing the wall thickness of the waterproof sealing skirt. These designs all allow for a significant reduction in the overall volume and internal volume of the mask.

[0012] To achieve the above objective, the present invention discloses a water activity mask comprising two lenses, a waterproof sealing skirt, and a fastening device. The waterproof sealing skirt integrally forms two lens frames, a nose mask portion, and a rear edge. The two lens frames are independent of each other. Each lens frame has an inner portion. The two lenses are waterproofly fitted into the two lens frames, respectively. The nose mask portion connects the two lens frames and protrudes forward from between the two lens frames. The rear edge can be made to fit snugly against the user's face. The fastening device is provided between the two outer ends of the waterproof sealing skirt. When the user puts on the mask using the fastening device, the inner portions of the two lens frames can be made adjacent to the user's two orbital bones, respectively.

[0013] In one example, the mask further includes two connecting parts. One of the two connecting parts is formed between the nose mask portion and one of the two lens frames, and the other of the two connecting parts is formed between the nose mask portion and the other of the two lens frames. When the user wears the mask, the nose mask portion is capable of covering the user's entire nose, and the two connecting parts substantially cover the cheekbones of the user's face.

[0014] In one example, the trailing edge has a notch portion formed above the upper part of the nose mask portion. This notch portion protrudes slightly forward, forming a raised area. When the user puts on the mask, the raised area can be fitted tightly along the contour of the user's face defined by the glabella and nasal bone.

[0015] In one example, a reinforcing structure is provided on at least one of the upper, lower, and inner portions of each lens frame. When the user puts on the mask, the reinforcing structure adheres closely to at least a portion of the user's two orbital bones.

[0016] In one example, the reinforcing structure is provided on at least one of the upper and lower parts of each of the two lens frames. Furthermore, the reinforcing structure is a recessed region integrally formed by the waterproof sealing skirt.

[0017] In one example, the reinforcing structure is a reinforcing rib, which is fixed to the inside of the waterproof sealing skirt or molded integrally with the waterproof sealing skirt.

[0018] In one example, the reinforcing rib is made of a different material than the waterproof sealing skirt and has a Shore A hardness between 20 and 60.

[0019] In one example, the reinforcing rib is formed by increasing the thickness of the waterproof sealing skirt and has a Shore A hardness between 40 and 80.

[0020] In one example, the reinforcing structure is a gasket provided on the inner side of each lens frame.

[0021] In either case, the fastening device is an elastic headband.

[0022] In any of these cases, the mask further includes a snorkel that allows fluid to be communicated to the internal space of the nose mask portion.

[0023] In one example, the mask further includes a three-way tube having a mouthpiece portion, a drain valve portion, and a nasal communication portion that communicate fluids with each other. The nasal communication portion communicates fluids with the internal space of the nasal mask portion. [Brief explanation of the drawing]

[0024] [Figure 1A] Figure 1A shows a conventional single-lens mask. [Figure 1B] Figure 1B shows a conventional two-lens mask. [Figure 1C]Figure 1C is a schematic diagram when the user wears the mask of Figure 1A. [Figure 1D] Figure 1D is a schematic diagram of a partial cross-section of Figure 1A, explaining that since a rather large distance occurs between the lens of a conventional single-lens mask and the user, it is necessary to make the waterproof sealing skirt thick. [Figure 1E] Figure 1E is a schematic diagram of another partial cross-section of Figure 1A, explaining that since a conventional single-lens mask is restricted by the drop between the user's eyebrows and nasal bone, it is necessary to further extend the waterproof sealing skirt upward or increase the width to move the lens frame and lens further forward. [Figure 2A] Figure 2A is a front schematic perspective view of an embodiment of the mask for water activities in the present invention. [Figure 2B] Figure 2B is a front view of Figure 2A with the tightening device omitted. [Figure 2C] Figure 2C is a schematic diagram when the user wears the mask of Figure 2A, and the mask in the figure is a cross-sectional view obtained along the section line 2c-2c of Figure 2B. [Figure 2D] Figure 2D is a rear schematic perspective view of Figure 2A with the tightening device omitted. [Figure 2E] Figure 2E is a schematic diagram when the user wears the mask of Figure 2A, and the mask in the figure is a cross-sectional view obtained along the section line 2e-2e of Figure 2B. [Figure 2F] Figure 2F is a schematic diagram when the mask in the present invention can be stored by folding it in two. [Figure 2G] Figure 2G is a cross-sectional view obtained along the section line 2g-2g of Figure 2B. [Figure 2H] Figure 2H is a rear schematic perspective view of the mask with the tightening device omitted in another embodiment of the present invention. [Figure 3] Figure 3 is a perspective view of a mask having a snorkel and a three-way pipe in another embodiment of the present invention.

Embodiments for Carrying out the Invention

[0025] The following descriptions of embodiments are merely for detailing the content of the present invention and are not intended to limit it. Furthermore, components not directly related to the present invention are not shown. Also, the size relationships between components in the figures are for ease of understanding only and are not intended to limit actual proportions. In addition, terms such as front, back, left, right, inside, outside, front, back, etc., used in each description are merely relative relationships defined based on the user's orientation and are not intended to be restrictive.

[0026] The present invention relates to a mask for water activities. The water activity mask may be a swimming goggle, a swimming mask, a diving mask, or any other form of breathable mask (but is not limited to these). All of these can adopt the structure of the mask of the present invention, but differ only in the manner in which the mask covers the user's eyes, covers the eyes and nose, and, if the user's eyes and nose are covered, whether the nose can breathe freely.

[0027] Next, with reference to Figures 2A to 2H, an embodiment representative of a mask that covers the user's eyes and nose (e.g., a diving mask, snorkel mask, or bow fishing mask) will be described. Specifically, as shown in Figure 2A, the water activity mask 2 includes two lenses 21, a waterproof sealing skirt 23, and a fastening device 25. The fastening device 25 is provided between the two outer ends 23e of the waterproof sealing skirt 23 (due to the angle, only one outer end 23e of the waterproof sealing skirt 23 is shown in Figure 2A). For example, the fastening device 25 may be an elastic headband, preferably with both ends fixed to the two outer ends 23e of the waterproof sealing skirt 23 (usually best corresponding to the outside of the lens frame 23a). However, it is not limited to this, and any mechanism that can help the user securely wear the mask 2 is possible. For the sake of simplicity, Figures 2B to 2E and 2H omit the fastening device 25 in order to provide a detailed explanation of the main structure of the mask 2 without it being obstructed.

[0028] As shown in Figure 2B, the waterproof sealing skirt 23 is optimally a single piece made of a soft material, silicone rubber. However, other soft materials with waterproof and stretchable properties, such as thermoplastic rubber (TPR) (e.g., thermoplastic elastomer (TPE)), thermoplastic polyurethane (TPU), or polyvinyl chloride (PVC), may be used as the base material. In the specific structure, the waterproof sealing skirt 23 has two lens frames 23a, a nose mask portion 23b, and a rear edge 23c integrally formed. The two lens frames 23a are independent of each other, and each lens frame 23a has an inner portion 23a1. The two lenses 21 can be waterproofly fitted into the two lens frames 23a. The nose mask portion 23b connects the two lens frames 23a and protrudes forward from between the two lens frames 23a. The posterior edge 23c can be made to fit snugly against the user's face. As shown in Figure 2C, when the user puts on the mask 2 using the tightening device 25, the inner portions 23a1 of the two lens frames 23a can be made adjacent to the user's two orbital bones UB1, respectively. Adjacent here includes being very close or already in contact.

[0029] The waterproof sealing skirt 23 further includes two connecting portions 23d, each formed between the nose mask portion 23b and each lens frame 23a. Specifically, the left connecting portion 23d is formed between the nose mask portion 23b and the left lens frame 23a, and the right connecting portion 23d is formed between the nose mask portion 23b and the right lens frame 23a. When the user puts on the mask 2, the nose mask portion 23b is capable of covering the user's entire nose, and the user's nose is housed within the internal space 220 of the nose mask portion 23b. Furthermore, the two connecting portions 23d substantially cover the position of the cheekbones UB2 on the user's face.

[0030] Unlike conventional masks, the rear edge 23c of the waterproof sealing skirt 23 may have a notch portion 23c1 formed above the upper part 23b1 of the nose mask portion 23b. The notch portion 23c1 protrudes slightly forward, forming a raised area. In plan view, this is equivalent to forming an open portion. Thus, as shown in Figure 2E, when the user puts on the mask 2, the raised area of ​​the notch portion 23c1 can fit snugly along the contour of the user's face defined by the glabella UG and nasal bone UB3. This design eliminates the need to design the rear edge 23c near the lens frame 23a as a large upper flat area in the waterproof sealing skirt 23 of the present invention. This allows for a significant reduction in the width of the rear edge 23c of the waterproof sealing skirt 23, and a clear reduction in the distance between the lens frame 23a and lens 21 and the user. In addition, the left and right lens frames 23a are positioned appropriately adjacent to the user's orbital bone UB1 without being obstructed by the glabella and nasal bone regions, allowing the mask 2 to fit more snugly against the face. Furthermore, this structure has extremely small and separate lens frames 23a and lenses 21, and there are no rigid connecting members between the two lens frames 23a. Therefore, as shown in Figure 2F, the mask 2 can be easily folded in half, and its storage volume can be made extremely small, greatly improving convenience during packaging and carrying.

[0031] More preferably, a reinforcing structure 23r is provided in at least one of the upper, lower, and inner parts of each lens frame 23a. This allows the reinforcing structure 23r to adhere closely to at least a portion of the user's orbital bone UB1 when the user puts on the mask 2. In one embodiment, as shown in Figures 2A to 2F, the reinforcing structure 23r may be provided in the lower part of each lens frame 23a and may also be a recessed region 231 integrally formed by the waterproof sealing skirt 23.

[0032] In another embodiment, as shown in Figure 2G, the reinforcing structure 23r may be a reinforced rib 233 that is separately fixed to the outside or inside of the waterproof sealing skirt 23, or molded integrally with the waterproof sealing skirt 23. In one embodiment, the reinforcing rib 233 may be made of a different material from the waterproof sealing skirt 23, and preferably has a Shore A hardness between 20 and 60. In yet another embodiment, the reinforcing rib 233 may be made of the same material as the waterproof sealing skirt 23, and the reinforcing rib 233 is formed by increasing the thickness of the waterproof sealing skirt 23. In this case, preferably the overall hardness of the waterproof sealing skirt 23 has a Shore A hardness between 40 and 80.

[0033] Furthermore, in one embodiment, referring to Figure 2H, the reinforcing structure 23r may be a gasket 235 provided on the inner portion 23a1 of each lens frame 23a, directly facing and adjacent to the user's orbital bone UB1.

[0034] When a user engages in water activities, water pressure presses the mask 2 against the user's face. At this time, the various reinforcing structures, whether recessed areas, reinforcing ribs, or gaskets, press against and contact at least a portion of the user's orbital bone UB1, thereby stably sealing the mask 2 to the face. In this case, the left and right lens frames 23a and the left and right lenses 21 no longer experience relative displacement, further enhancing the waterproofing effect. In particular, in embodiments using a gasket 235 that completely surrounds the orbital bone UB1, the surrounding gasket 235 is made a reinforcing structure 23r, providing two layers of waterproofing mechanisms similarly on the inside and outside of the mask 2 (i.e., provided by the gasket 235 on the inside and by the waterproof sealing skirt 23 on the outside), resulting in even better waterproofing for the eyes.

[0035] In any embodiment, a groove 23ag may be provided on the inner edge of each lens frame 23a for fitting the corresponding lens 21 in a waterproof manner, or the two lens frames 23a may be integrally overmolded onto the two lenses 21. All of these methods are feasible.

[0036] Furthermore, as described above, the essence of the present invention lies in the fact that the mask 2 comes into contact with the user and accommodates the user's facial organs (e.g., eyes and nose), and the use or form of the mask 2 is irrelevant. For example, in the modified embodiment shown in Figure 3, the mask 3 of the present invention further includes a snorkel 31 that allows fluid to communicate with the internal space 220 of the nasal mask portion 23b. The mask 3 may further include a three-way tube 33 having a mouthpiece portion 33a, a drain valve portion 33b, and a nasal communication portion 33c that communicate fluid with each other. The mouthpiece portion 33a can be placed in the user's mouth. The nasal communication portion 33c also communicates fluid with the internal space 220 of the nasal mask portion 23b. As a result, the user can inhale and exhale through their nose via the nasal communication portion 33c and through their mouth via the mouthpiece portion 33a, and the water accumulated inside the mask 3 can be discharged by the drain valve of the drain valve portion 33b. This structure makes it possible to create a mask 3 that is extremely small in volume, highly portable, and allows for comfortable breathing.

[0037] The above embodiments are illustrative, and any modification of the design may constitute a viable alternative protected by the present invention. For example, to achieve a better waterproof effect and accommodate a wider range of face shapes, the notch at the rear edge of the waterproof sealing skirt may not protrude forward but be flush with the rest of the rear edge. In this case, when the user puts on the mask, the notch should flexibly conform to the contour defined by the user's glabella and nasal bone, thereby blocking communication between the internal space of the nose mask and the outside. In addition, as shown in Figures 2H and 3, indentations 23h may be provided on both sides below the nose mask portion 23b to facilitate the user inserting their fingers and pinching their nose to perform Frenzel icorizing. This, too, is another preferred design and solution.

[0038] In summary, the water activity mask of the present invention eliminates the need for a rigid bridge member between the left and right lens frames and the left and right lenses by integrally molding the left and right lens frames, which are independent of each other and to which the left and right lenses are assembled, with a soft, waterproof, sealing skirt. Furthermore, because the lenses can come considerably closer to the eyes, a wide field of view can be obtained without making the lens size excessively large. In addition, since the left and right lens frames can directly contact the left and right orbital bones of the user, stability during wear is provided. Moreover, the weight of the lens frames and lens area is greatly reduced, and the distance from the eyes is also greatly reduced, so the waterproof, sealing skirt is not pulled by the lens frames or lenses, and a very good watertight effect can be provided. Accordingly, based on these designs, the present invention can significantly reduce the overall volume and internal volume of the mask, thus offering advantages such as miniaturization, portability, and safety of use.

[0039] The above embodiments are merely illustrative of embodiments of the present invention and to elaborate on its technical features, and are not intended to limit the scope of protection of the present invention. Any modifications or equivalent adjustments that can be easily completed by a person familiar with the art fall within the scope claimed by the present invention. Therefore, the scope of protection of the rights of the present invention should be based on the claims. [Explanation of symbols]

[0040] 1a Mask 1b Mask 11a lens 11b lens 13a Lens Frame 13b Lens Frame 15a Waterproof Sealed Skirt 15a1 trailing edge 15b Waterproof Sealed Skirt 17a Headband 17b Headband 2 masks 3 Masks 21 lenses 23 Waterproof Sealed Skirt 23a Lens Frame 23a1 Inside part 23ag groove 23b Nasal mask section 23b1 Upper part 23c trailing edge 23c1 Notch section 23d Connection part 23e outer edge 23h indentation 23r Reinforcement structure 25. Fastening device 31 Snorkel 33 Three-way tube 33a Mouthpiece section 33b Drain valve part 33c Nasal communication part 220 Interior space 231 Concave area 233 Reinforcement Ribs 235 Gasket UE eye UB1 orbital bone UB2 cheekbones UB3 nasal bone UG (between the eyebrows)

Claims

1. In water activity masks, Two lenses, Two independent lens frames, each having an inner portion, into which the two lenses are fitted in a waterproof manner, The two lens frames are connected, and a nose mask portion protrudes forward from between the two lens frames, A waterproof, sealed skirt with an integrally formed rear edge that can be closely fitted to the user's face, A fastening device provided between the two outer ends of the aforementioned waterproof sealing skirt, Includes, When the user puts on the mask using the fastening device, the inner portions of the two lens frames become adjacent to the user's two orbital bones, respectively. Each lens frame is provided with a reinforcing structure in at least one of its upper, lower, and inner portions, and when the user puts on the mask, the reinforcing structure adheres closely to at least a portion of the user's two orbital bones. The reinforcing structure is provided on at least one of the upper and lower parts of each of the two lens frames, and the reinforcing structure is a recessed area integrally formed by the waterproof sealing skirt.

2. In water activity masks, Two lenses, Two independent lens frames, each having an inner portion, into which the two lenses are fitted in a waterproof manner, The two lens frames are connected, and a nose mask portion protrudes forward from between the two lens frames, A waterproof, sealed skirt with an integrally formed rear edge that can be closely fitted to the user's face, A fastening device provided between the two outer ends of the aforementioned waterproof sealing skirt, Includes, When the user puts on the mask using the fastening device, the inner portions of the two lens frames become adjacent to the user's two orbital bones, respectively. Each lens frame is provided with a reinforcing structure in at least one of its upper, lower, and inner portions, and when the user puts on the mask, the reinforcing structure adheres closely to at least a portion of the user's two orbital bones. The reinforcing structure is a reinforcing rib, which is fixed to the inside of the waterproof sealing skirt or molded integrally with the waterproof sealing skirt. The reinforcing ribs are made of a different material from the waterproof sealing skirt and have a Shore A hardness between 20 and 60.

3. In water activity masks, Two lenses, Two independent lens frames, each having an inner portion, into which the two lenses are fitted in a waterproof manner, The two lens frames are connected, and a nose mask portion protrudes forward from between the two lens frames, A waterproof, sealed skirt with an integrally formed rear edge that can be closely fitted to the user's face, A fastening device provided between the two outer ends of the aforementioned waterproof sealing skirt, Includes, When the user puts on the mask using the fastening device, the inner portions of the two lens frames become adjacent to the user's two orbital bones, respectively. Each lens frame is provided with a reinforcing structure in at least one of its upper, lower, and inner portions, and when the user puts on the mask, the reinforcing structure adheres closely to at least a portion of the user's two orbital bones. The reinforcing structure is a mask, which is a gasket provided on the inner part of each lens frame.

4. Furthermore, it includes two connecting parts, one of which is formed between the nose mask portion and one of the two lens frames, and the other of which is formed between the nose mask portion and the other of the two lens frames. When the user puts on the mask, the nose mask portion is capable of covering the user's entire nose. The mask according to any one of claims 1 to 3, wherein the two connecting portions substantially cover the cheekbones of the user's face.

5. The aforementioned posterior edge has a raised region formed above the upper part of the nose mask portion, The mask according to claim 4, wherein when the user puts on the mask, the raised area can be made to fit snugly along the contour of the user's face defined by the space between the eyebrows and the nasal bone.

6. The mask according to any one of claims 1 to 3, wherein an annular groove is formed on the inner edge of each lens frame, into which each lens is fitted in a suitably waterproof manner.

7. The mask according to any one of claims 1 to 3, wherein the two lens frames and the two lenses are integrally overmolded.

8. The mask according to any one of claims 1 to 3, wherein the fastening device is an elastic headband.

9. Furthermore, the mask according to any one of claims 1 to 3, further comprising a snorkel that allows fluid to be communicated to the internal space of the nose mask portion.

10. Furthermore, the mask according to claim 9 includes a three-way tube having a mouthpiece portion, a drain valve portion, and a nasal communication portion that communicate fluids with each other, wherein the nasal communication portion communicates fluids with the internal space of the nasal mask portion.

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