BREATHABLE DIVING MASK

Abstract

A breathable diving mask (60) includes a body (61) having a main frame (63), a visor (64), and a watertight sealing enclosure (65). The watertight sealing enclosure includes a partition that divides the interior of the body into an upper chamber that shields the eyes and a lower chamber that shields the nose (N), and establishes independent air inlet and outlet channels to separate the inhaled fresh air and the exhaled air. Alternatively, a nose connection portion (681) having a purge valve (684) may be provided in fluid communication with the lower chamber. It is also possible to provide a three-way connector (680) having a nose connection portion (681), a mouth portion (682), and a drain portion (683) in fluid communication with each other, the nose connection portion being in fluid communication with the lower chamber.The mouth portion (682) is adapted to be received in the user's mouth when the user properly wears the breathable diving mask.

Description

CROSS REFERENCES TO RELATED APPLICATIONSThis patent application claims the benefit of U.S. Provisional Applications No. 63 / 304,383, filed January 28, 2022, and No. 63 / 356,237, filed June 28, 2022.BACKGROUND OF THE INVENTIONField of the InventionThe present invention relates to a diving mask for water sports, particularly a breathable diving mask, by which a snorchler can breathe through its nose or through its nose and mouth when wearing the diving mask.Descriptions of Prior ArtAs shown in Figure 1, most current snorkel activities use a diving mask 1 covering the eyes and nose and a snorkel 2. The user cannot breathe through the nose at all and only breathe with the mouth through the snorkel 2. Since the breathing tube 2 extends from one side of the diving mask 1, its use is unbalanced. In addition, since the breathing tube 2 needs to be connected to the diving mask 1, the connection position is usually very close to the headband 3 of the diving mask 1, and the headband 3 can easily catch on the hair, such a snorkeling equipment increases the user's discomfort in wearing. In addition, the human is accustomed to inhaling air through the nose, so the use of this equipment forces the user to breathe only through the mouth, which is counter to the physical nature of the human.Based on the above shortcoming, the industry has started to consider taking over the full-face snorkel mask (FFSM) upper snorkel 4 to attach it to the traditional diving mask 5 and then to let it communicate with the interior of the diving mask 5, allowing the user to breathe through the nose. That is, the traditional mouthpieceed breathing tube 2 as shown in Fig. 1 is replaced with the configuration shown in Fig. 2A. Of course, this configuration is smaller than an FFSM and can maintain a good fit on the user's face. However, in this embodiment, the breathing tube 4 communicates with the nose pocket 7 of the diving mask 5 via a tunnel 6 to enable the user to breathe through the nose (see also Fig. 2B). In this embodiment, the air flow of the inhalation and exhalation is not separated. During breathing cycles, clean air and air in the nasal pocket 7 of the diving mask 5 are rapidly mixed and the carbon dioxide concentration in the diving mask 5 rises sharply, whereby the user can easily become uneasy hypoxic within a short time. If the user feels uncomfortable, there is no way to change to oral breathing. In addition, due to improper use of the shape and material of the nasal covering portion 8 of this embodiment, after the actual use test, the result of "automatic nose compression" (as shown in FIG. 2C) occurs due to the water pressure P, which hinders the nasal breathing. The probability of danger becomes higher. In addition, water entering the diving mask 5 accumulates in the nasal pocket 7 within the nasal covering portion 8 very close to the nostrils of the user. By this accumulated water, the user feels uncomfortable and even swallows water.Moreover, the diving mask 5 can only cover eyes and nose, and the user's mouth is still exposed to water. This causes the user to naturally close the mouth to prevent accidental drinking of water, making no sense of safety.Therefore, the suggestion of a design that partially or completely solves the above problems will be a great breakthrough and will become the goal followed by industry.EP 3 647 179 A1 relates to a full-face immersion mask comprising, inter alia, a disc housing and a matching mask which are sealed to one another at an interface.SUMMARY OF THE INVENTIONThe first object of the present invention is to provide a breathable diving mask that covers the eyes and nose of the user, that allows the user to breathe freely through the nose in the diving mask, and that allows the inhaled fresh air and the exhaled air to be separated. The diverted air flow does not increase the carbon dioxide concentration in the immersion mask. The first object is achieved by the subject matter of claim 1.The second object of the present invention is to provide a breathable diving mask that covers the eyes and nose of the user, that allows the user to breathe freely through the nose in the diving mask, and that allows the inhaled fresh air and the exhaled air to be separated. The diverted air flow does not increase the carbon dioxide concentration in the immersion mask. In addition, there is a nose connection portion extending outward from the bottom of the diving mask, and a flushing valve is provided to store water entering the diving mask, so that the water is kept away from the nostrils and can be effectively discharged through the flushing valve. The second object is achieved by the subject matter of claim 6.The third object of the present invention is to provide a breathable diving mask that covers the eyes and the nose of the user, that allows the user to breathe freely through the nose in the diving mask, and that allows the inhaled fresh air and the exhaled air to be separated. The diverted air flow does not increase the carbon dioxide concentration in the immersion mask. In addition, there is a three-way connector extending outward from the bottom of the diving mask. One path of the three-way connectors is connected to the nasal covering portion, and another path thereof is provided with a flushing valve to store water entering the diving mask, to keep the water away from the nostrils and to allow the water to pass effectively through the flushing valve. The other path of the three-way connector is coupled to a mouthpiece to allow it to be received through the user's mouth. In addition to improving the stability of wearing the diving mask, the user is also allowed to breathe through the mouth in addition to inhaling and exhalation through the nose. The third object is achieved by the subject matter of claim 13.To achieve the above three objects together, the nasal covering portion of the present invention may use a material having a certain hardness or provide a configuration having a certain shape, whereby it is not influenced by water pressure that hinders normal breathing through the nose.BRIEF DESCRIPTION OF THE DRAWINGSFIG. 1 is a schematic illustration of a user wearing the prior art snorkeling equipment. FIG. 2A is a schematic illustration of another prior art Schnorchelic immersion mask. FIG. 2B is a schematic partial rear view of FIG. 2A showing inlet and outlet air flow. FIG. 2C is a partial, front schematic view of FIG. 2A showing deformation of the nasal pocket compressed by water pressure (P). FIG. 3A is a rear perspective view of the first embodiment of the present invention. FIG. 3B is a sagittal cross-sectional view taken along line 3B- 3B in FIG. 3A. FIG. 3C is a coronal cross-sectional view taken along line 3C- 3C in FIG. 3A showing intake airflow. FIG. 3D is the same as FIG. 3C, but shows the exhaust air flow. FIG. 3E is a cross-sectional view taken along line 3E- 3E in FIG. 3A, showing the cross-sectional shape of the nasal covering portion. FIG. 4A is a front perspective view of the second embodiment of the present invention. FIG. 4B is a perspective view of FIG. 4A. FIG. 4C is a coronal cross-sectional view taken along line 4C- 4C in FIG. 4A showing intake airflow. FIG. 4D is the same as FIG. 4C but shows the exhaust air flow. FIG. 4E is a sagittal cross-sectional view taken along line 4E- 4E in FIG. 4A. FIG. 4F is a transverse cross-sectional view taken along line 4F-4F in FIG. 4A. FIG. 5A is a front perspective view of a third embodiment of the present invention. FIG. 5B is a rear perspective view of FIG. 5A. FIG. 5C is a sagittal cross-sectional view taken along line 5C- 5C in FIG. 5A, showing the intake air flow. FIG. 5D is a coronal cross-sectional view taken along line 5D- 5D in FIG. 5A showing the exhaust air flow. FIG. 6 is another configuration of the three-way connector in the third embodiment of the present invention. FIG. 7 is still another configuration of the three-way connector in the third embodiment of the present invention. FIG. 8A is an expanded configuration of the three-way connector in the third embodiment of the present invention. FIG. 8B is a rear perspective view of FIG. 8A. FIG. 8C is a sagittal cross-sectional view taken along line 8C- 8C of FIG. 8A, showing the intake air flow. FIG. 8D is a coronal cross-sectional view taken along line 8D- 8D showing the exhaust air flow.DESCRIPTION OF THE PREFERRED EMBODIMENTThe first embodiment of the present invention mainly provides a breathable diving mask that covers the eyes and the nose of the user, that allows the user to breathe freely through the nose in the diving mask, and that allows the inhaled fresh air and the exhaled air to be separated.As shown in FIGS. 3A to 3E, a breathable diving mask 10 includes a body 11 and a breathing tube 12, and the breathing tube 12 is in fluid communication with the interior of the body 11. Preferably, the breathing tube 12 is made of hard material. The outlet pipe 122 has two branches, one of which is located on the left side and the other on the right side of the inlet pipe 121. The body 11 includes a main frame 13, a lens 14 mounted in the main frame 13, and a waterproof seal bezel 15 partially mounted on the main frame 13 and the lens 14. The waterproof seal cover 15 is adapted to be attached to a user's face. The waterproof seal enclosure 15 has a partition 16 that divides the interior of the body 11 into an upper chamber 17 and a lower chamber 18. When the user wears the breathable diving mask 10 by tightening a fastening device (i.e., an elastic headband, not shown), the partition 16 sits on the user's nose and the user's eyes are accommodated in the upper chamber 17, whereas the user's nose is accommodated in the lower chamber 18. The breathable diving mask 10 does not cover the user's mouth The breathable diving mask 10 is characterized in that the body 11 further includes an inlet duct and an outlet duct. The inlet duct is formed between the air inlet duct 121 and the lower chamber 18 and comprises a first one-way valve 161, the first 161 one-way valve being arranged at this partition 16. The first one-way valve 161 is provided for allowing external fresh air to enter the lower chamber 18 through the intake passage. The exhaust duct is formed between the exhaust duct 122 and the lower chamber 18, and the exhaust duct is provided so that only air exhaled by the user can pass through and be discharged to the outside. The inlet channel and the outlet channel have a fluid flow that is independent of one another.In order that the small amount of air remaining in the exhaust passage does not flow back into the lower chamber 18 to remix with the fresh air which is inhaled by the user in the next breathing cycle, resulting in a small amount of carbon dioxide accumulating in the diving mask, a second one-way valve 162 may be provided. In this manner, the inlet passage is defined by the upper chamber 17 and the first one-way valve 161, while the outlet passage is defined by the second one-way valve 162 and an outlet tunnel 19. And the outlet tunnel 19 is formed by the waterproof seal bezel 15 together with a peripheral edge 141 of the lens 14, as shown in FIGS. 3A to 3C. With continued reference to FIG. 3C, the second one-way valve 162 is disposed on the partition 16. When the user inhales, fresh air from the intake pipe 121 passes through the upper chamber 17 and enters the lower chamber 17 through the first one-way valve 161 to be supplied to the nose (N) of the user for inhalation; whereas when the user inhales, the air passes through the second one-way valve 162 and the exhaust tunnel 19 and is then discharged to the outside through the exhaust pipe 122, as shown in Fig. 3D.The waterproof seal enclosure 15 further includes a nasal cover portion 151 defining the lower chamber 18 together with the partition 16, the nasal cover portion 151 having a protruding portion 152 and a lower portion 153 corresponding to the nostrils of the user, as shown in FIG. 3B. In order to prevent the nasal covering portion 151 from being deformed by water pressure, the nasal covering portion 151 is preferably made of a hard material having a Shore D hardness of 50-90 and selected from polycarbonate (PC), polypropylene (PP), polyethylene (PE), polyvinyl chloride (PVC), acrylonitrile-butadiene-styrene copolymer (ABS), or combinations thereof. As shown in FIGS. 3B and 3E, the nasal covering portion 151 may also be made of a softer material having a Shore A hardness of 30-95 formed in a certain shape. Specifically, the nasal covering portion 151 is made of a softer material having a Shore A hardness of 30-95, and the protruding portion 151 smoothly extends forward from a rear edge of the main frame 13 to form a cross section having a mountain shape with a single comb, the cross section having a maximum height (Nh) in the range of 20 mm to 35 mm. Alternatively, the protruding portion 152 protrudes forward from the rear edge of the main frame 13 to go beyond a lower outer edge of the main frame 13 by a maximum extension (Nt) in the range between 5 mm and 20 mm.The second embodiment of the present invention differs from the first embodiment mainly in that in the second embodiment, a nose connection portion is provided to be in fluid communication with the lower chamber of the diving mask, and a purge valve is provided at the nose connection portion. This may allow space for storing the accumulated water in the immersion mask, and the water may be discharged through the purge valve. Further, a part of the air exhaled by the nose can also be discharged through the purge valve, thereby making the discharge and outlet smoother... More specifically, as shown in FIGS. 4A to 4F, a breathable diving mask 20 includes a body 21 and a breathing tube 22, the breathing tube 22 being in fluid communication with an interior of the body 21. The breathing tube includes an inlet conduit 221 and an outlet conduit 222 adjacent the inlet conduit 221. The body 21 includes a main frame 23, a lens 24 mounted in the main frame 23, and a waterproof seal bezel 25 partially mounted on the main frame 23 and the lens 24. The waterproof seal bezel 25 is suitable for attachment to a user's face, the waterproof seal bezel 25 including a partition 26 that divides the interior of the body 21 into an upper chamber 27 and a lower chamber 28, whereby when a user wears the breathable diving mask 20 via a fastening device (i.e., a headband, not shown), the partition 26 sits on the user's nose and the user's eyes are accommodated in the upper chamber 27 while the user's nose is accommodated in the lower chamber 28. The diving mask 20 is characterized in that the body 21 further includes an inlet duct, an outlet duct and a nose connecting portion 280. The intake passage is formed between the intake passage 221 and the lower chamber 28, and includes a first one-way valve 261, the first one-way valve 261 being provided to allow external fresh air to enter the lower chamber 28 through the intake passage. The exhaust duct is formed between the exhaust duct 222 and the lower chamber 28, and the exhaust duct is provided so that air exhaled by the user can pass through and be discharged to the outside. The nose connection portion 280 has one end in fluid communication with the lower chamber 28, the other end being provided with a purge valve 284...The breathable diving mask 20 preferably further includes, as shown in FIGS. 4C and 4D, a second one-way valve 262, the inlet channel being defined by the upper chamber 27 and the first one-way valve 261, and the outlet channel being defined by the second one-way valve 261 and an outlet tunnel 29. The outlet tunnel 29 is formed by the waterproof seal bezel 25 together with a peripheral edge 241 of the lens 24. In this embodiment, the first one-way valve 261 is disposed on a side wall 292 at an entrance 291 of the outlet tunnel 29, and the second one-way valve 262 is disposed more inward in the outlet tunnel 29 with respect to the first one-way valve 261. When the user inhales through the nose, fresh air enters from the inlet pipe 221, through the upper chamber 27, the first one-way valve 261 and then the entrance 291 of the outlet tunnel 29 into the lower chamber 28 to be inhaling by the user, as shown in Fig. 4C; whereas when the user inhales through the nose, a part of the air passes through the second one-way valve 262 and enters the outlet pipe 222 to be discharged to the outside through the outlet tunnel 29, as shown in Fig. 4D.Referring to FIGS. 4D and 4E, the waterproof seal bezel 25 further includes a nasal cover portion 251 that defines the lower chamber 27 together with the partition 26; the nasal cover portion 251 having a protruding portion 252 and a lower portion 253 corresponding to the nostrils of the user. The nose connection portion 280 is in fluid communication with the lower chamber 28 via the lower region 253. To ensure that air and water entering the diving mask 20 can remain at the bottom of the nose connection portion 280 and do not return to the lower chamber 28, the lower region 253 more preferably includes a third one-way valve 263 that only allows liquid to pass from the lower chamber 28 into the nose connection portion 280; whereby when the user exhalation through the nose, a portion of the air passes through the third one-way valve 263 and is discharged to the outside through the purge valve 284 of the nose connection portion 280.Preferably, both the nasal covering portion 251 and the nasal connecting portion 280 are made of hard materials having a Shore D hardness of 50-90 and selected from polycarbonate (PC), polypropylene (PP), polyethylene (PE), polyvinyl chloride (PVC), acrylonitrile-butadiene-styrene copolymer (ABS), or combinations thereof. As shown in FIG. 4F, the nasal covering portion 251 may also be made of a softer material having a Shore A hardness of 30-95, and the protruding portion 252 gently extends forward from a rear edge of the main frame 23 to form a cross section having a mountain shape with a single comb. The cross section has a maximum height (Nh) in the range of 20 mm to 35 mm. Alternatively, the protruding portion 252 protrudes forward from the rear edge of the main frame to go beyond a lower outer edge of the main frame 23 by a maximum extension (Nt) in the range between 5 mm and 20 mm. The third embodiment of the present invention differs from the first embodiment mainly in that the diving mask in the third embodiment is further in fluid communication with a three-way connector below the lower chamber thereof. The three-way connector is provided with a mouthpiece and a flushing valve, and not only the user can hold the mouthpiece with the mouth, which makes more sense of safety, but also allows space for storing the accumulated water in the diving mask. In addition, water entering the diving mask may drain through the purge valve, and a part of air exhaled by the nose may also be discharged through the purge valve, thereby making the drain and outlet smoother.More specifically, as shown in FIGS. 5A to 5D, a breathable diving mask 30 includes a body 31 and a breathing tube 32, the breathing tube 32 being in fluid communication with an interior of the body 31. The breathing tube 32 includes an inlet conduit 321 and an outlet conduit 322 adjacent the inlet conduit 322. The body 31 includes a main frame 33, a lens 34 mounted in the main frame 31, and a waterproof seal bezel 35 partially mounted on the main frame 33 and the lens 34. The waterproof seal enclosure 35 is suitable for attachment to a user's face; the waterproof seal enclosure 35 has a partition 36 that divides the interior of the body 31 into an upper chamber 37 and a lower chamber 38, whereby when a user wears the breathable diving mask 30 via a fastening device (i.e., a headband, not shown), the partition 36 sits on the user's nose and the user's eyes are accommodated in the upper chamber 37 while the user's nose is accommodated in the lower chamber 38. The diving mask 30 is characterized in that the body 31 further includes an inlet duct, an outlet duct and a three-way connector 380. The intake passage is formed between the intake passage 321 and the lower chamber 38 and includes a first one-way valve 361, the first one-way valve 361 being provided so that external fresh air can enter the lower chamber 38 through the intake passage. The exhaust duct is formed between the exhaust duct 322 and the lower chamber 38, and the exhaust duct is provided so that air exhaled by the user can pass through and be discharged to the outside. The three-way connector 380 includes a nose connection portion 381, a mouth portion 382, and a drain portion 383 in fluid communication with each other, the nose connection portion 381 being in fluid communication with the lower chamber 38, whereby when the user hangs up the breathable diving mask 30, the mouth portion 382 is adapted to be received in the user's mouth. In addition, the drain portion 383 is adapted to drain and discharge downward and forward. To more effectively isolate air, the immersion mask 30 further includes a second one-way valve 362. In this embodiment, the inlet channel is defined by the upper chamber 37 and the first one-way valve 361, and the outlet channel is defined by the second one-way valve 362 and an outlet tunnel 39; the outlet tunnel 39 is formed by the waterproof seal bezel 35 together with a peripheral edge 341 of the lens 34.Preferably, as shown in FIGS. 5B-5D, the first one-way valve 361 is disposed on the partition 36 and the second one-way valve 362 is disposed on an entrance 391 of the outlet tunnel 39. When the user inhales through the nose (N) (see FIG. 5C ), the fresh air from the intake pipe 321 passes through the upper chamber 37 and the first one-way valve 361 into the lower chamber 38 to be supplied to the nose (N) of the user for inhalation; whereas when the user inhales through the nose (N) (see FIG. 5D ), a part of the air passes through the second one-way valve 362, enters the exhaust pipe 322 through the exhaust tunnel 39 and is discharged to the outside. The waterproof seal enclosure 35 further includes a nasal covering portion 351 that defines the lower chamber 38 together with the partition 36; the nasal covering portion 351 having a protruding portion 352 and a lower portion 353 corresponding to the nostrils of the user. The nasal connection portion 351 is in fluid communication with the lower chamber 38 via the lower region 353. Preferably, the nasal covering portion 351 is made of a hard material having a Shore D hardness of 50-90 and selected from polycarbonate (PC), polypropylene (PP), polyethylene (PE), polyvinyl chloride (PVC), acrylonitrile butadiene styrene copolymer (ABS), or combinations thereof. As shown in FIG. 5C, the nasal covering portion 351 may also be made of a softer material having a Shore A hardness of 30-95, and the protruding portion 352 gently extends forward from a rear edge of the main frame 33 to form a cross section having a mountain shape with a single comb. The cross section has a maximum height (Nh) in the range of 20 mm to 35 mm. Alternatively, the protruding portion 352 protrudes forward from the rear edge of the main frame 33 to go beyond a lower outer edge of the main frame 33 by a maximum extension (Nt) in the range between 5 mm and 20 mm.In order to more conform to the facial shapes of various users and allow users to wear more comfortably, the nose connection portion 381 and the lower region 353 are provided with a flexible portion 385 therebetween to promote a movable range of the three-way connector 380. The lower portion 353 includes a third one-way valve 363 that only allows liquid to pass from the lower chamber 38 into the nose connection portion 381; whereby, when the user inhales through the mouth (M) (see FIG. 5C ), the fresh air passes through the third one-way valve 363 and the mouth portion 382 to be supplied to the user. When the user exhalations through the nose (N) (see FIG. 5D ), the air passes through the third one-way valve 363 and the nose connection portion 381 and is discharged to the outside through the drain portion 383. When the user exhalation through the mouth (M) (see again FIG. 5D ), the air passes from the mouth portion 382 towards the drain portion 383 and is then discharged through the purge valve 384 disposed at the end of the drain portion 383. Meanwhile, when water entering the diving mask 30 has accumulated in the three-way connector 380 (normally, it mainly accumulates in the drain portion 383), it drains out through the purge valve 384 together with the air exhaled by the user through the mouth. In this way, the air exhaled by the mouth as well as the water drain cannot return to the lower chamber 38 because it is blocked by the third one-way valve 363.The configuration of the flexible portion 385 is not limited to the above. It is also feasible to provide an independent flexible connector 485 by extending a flexible portion having a folded side wall 486 to increase the movable range of the three-way connector 480 as shown in FIG. 6. And the configuration of the three-way connector is also not limited to the above. The internal space of the drain portion 583 of the three-way connector 580 may be enlarged so that it can store more water entering the submergence mask. FIG. 7 shows one of the examples in which the draining and discharging of the draining portion 583 is downward and sideways.Continuing with the third embodiment of the present invention, the configuration of the three-way connector may also be changed as shown in FIGS. 8A to 8D. When the user exhalations into the water, the air bubbles of the drain and outlet are not directed upward, but to the sides of the user's face, which does not obstruct the user's view of the environment in the water.As shown in FIGS. 8A to 8D, a breathable diving mask 60 includes a body 61 and a breathing tube 62, the breathing tube 62 being in fluid communication with an interior of the body 61. The breathing tube 62 includes an inlet conduit 621 and an outlet conduit 622 adjacent the inlet conduit 621. The body 61 includes a main frame 63, a lens 64 mounted in the main frame 63, and a waterproof seal bezel 65 partially mounted on the main frame 63 and the lens 64. The waterproof seal enclosure 65 is suitable for attachment to a user's face; the waterproof seal enclosure 65 includes a partition 66 that divides the interior of the body 61 into an upper chamber 67 and a lower chamber 68, whereby when a user wears the breathable diving mask 60 via a fastening device (i.e., a headband, not shown), the partition 66 sits on the user's nose and the user's eyes are accommodated in the upper chamber 67 while the user's nose is accommodated in the lower chamber 68. The diving mask 60 is characterized in that the body 61 further includes an inlet duct, an outlet duct and a three-way connector 680. The intake passage is formed between the intake passage 621 and the lower chamber 68, and includes a first one-way valve 661, the first one-way valve 661 provided for allowing external fresh air to enter the lower chamber 68 through the intake passage. The exhaust duct is formed between the exhaust duct 622 and the lower chamber 68, and the exhaust duct is provided so that air exhaled by the user can pass through and be discharged to the outside. The three-way connector 680 includes a nose connection portion 681, a mouth portion 682, and a drain portion 683 in fluid communication with each other, the nose connection portion 681 in fluid communication with the lower chamber 68, whereby when the user hangs up the breathable diving mask 60, the mouth portion 682 is adapted to be received in the user's mouth. In addition, the drain portion 583 is preferably adapted to drain and outlet downward and forward. The diving mask 60 further comprises a second one-way valve 662, wherein the inlet channel is defined by the upper chamber 67 and the first one-way valve 661, and the outlet channel is defined by the second one-way valve 662 and an outlet tunnel 69; and wherein the outlet tunnel 69 is formed by the waterproof sealing enclosure 65 together with a peripheral edge 641 of the lens 64.This extended embodiment shown in Figs. 8A to 8D is almost the same as the embodiment shown in Figs. 5A to 5D. Only the configuration of the three-way connector 680 is changed. More specifically, the drain portion 683 includes a base 685 that extends downwardly from the nose connection portion 681. The base 685 has a first connecting portion 687 and the second connecting portion 688 opposite to the first connecting portion 687. The first connecting portion 687 is adapted to house a purge valve 684 mounted therein. The mouth portion 682 is defined by the second connecting portion 688 and a mouthpiece 698 attached thereto. The drain portion 683 further includes a baffle 690, wherein the baffle 690, the purge valve 684, and the first connection portion 687 collectively define the drain portion 683. The guide surface 690 extends downward from the nose connection portion 681 and faces the purge valve 684. Preferably, the baffle 690 and the purge valve 684 are snap-connected (691) to form a gap 692 therebetween. As the user exhalations, the air and / or accumulated water may be laterally vented through the gap 692. More preferably, there are guide ribs 695 extending from the two sides of the guide surface 690 to aid the drain and outlet along desired directions, i.e., sideways and downward, to prevent air bubbles from rising up.The following is a description of the inlet and outlet flow. The first one-way valve 661 is disposed on the partition 66. When the user inhales through the nose (N) (see FIG. 8C ), fresh air from the intake pipe 621 passes through the upper chamber 67 and enters the lower chamber 68 to be inhaled by the user through the nose. When the user exhalation through the nose (N) (Fig. 8D), a portion of the air enters the outlet tunnel 69 through the second one-way valve 662 located at the entrance of the outlet tunnel 69, and then passes through the outlet duct 622 to be discharged to the outside. The waterproof seal enclosure 65 further includes a nasal covering portion 651 that defines the lower chamber 68 together with the partition 66; the nasal covering portion 651 has a protruding portion 652 and a lower portion 653, and the lower portion 653 is adapted to correspond to the nostrils of the user. The nose connection portion 681 is in fluid communication with the lower chamber 68 via the lower region 653.More preferably, the lower portion 653 includes a third one-way valve 663 that only allows fluid to pass from the lower chamber 68 into the nose connection portion 681. When the user inhales through the mouth (M) (see FIG. 8C ), fresh air passes through the third one-way valve 663 and the mouth portion 682 to be supplied to the user. When the user exhalation through the nose (N) (see FIG. 8D ), air passes through the third one-way valve 663 and the nose connection portion 681 and is then discharged to the outside through the drain portion 683; whereas when the user exhalation through the mouth (M) (see FIG. 8D again), the air is discharged from the mouth portion 682 to the outside toward the drain portion 683, and water accumulated in the three-way connector 680 (normally, it mainly accumulates in the drain portion 683) is also pushed out through the drain portion 683. The air and the accumulated water passing through the drain portion 683 first hit the guide surface 690 and then are discharged downward and outward along the guide ribs 695 extending on both sides of the guide surface 690. In this manner, the air exhaled by the mouth as well as the water drain cannot return to the lower chamber 68 because it is blocked by the third one-way valve 663.In this expanded third embodiment, the material used for the nasal covering portion 651 and the cross section thereof are similar to those of the previous embodiments. In particular, when made of hard material, it has a Shore D hardness of 50-90 and is selected from polycarbonate (PC), polypropylene (PP), polyethylene (PE), polyvinyl chloride (PVC), acrylonitrile butadiene styrene copolymer (ABS), or combinations thereof. When the nasal covering portion 651 is made of a softer material, preferably having a Shore A hardness of 30-95, the protruding portion 652 extends smoothly forward from a rear edge of the main frame 63 to form a cross section having a mountain shape with a single comb. The cross section has a maximum height (Nh) in the range of 20 mm to 35 mm. Alternatively, the protruding portion 652 protrudes forward from the rear edge of the main frame 63 to go beyond a lower outer edge of the main frame 63 by a maximum extension (Nt) in the range between 5 mm and 20 mm.In addition to the above-mentioned preferred embodiments having described the structure and the operation mode of the technology of the present invention in detail, any other embodiments transformed based on the concept of the present invention, for example, as follows are intended to be included in the equivalents of the present invention and are not intended to limit the scope of the literal meanings as set forth in the latest paragraph.Symmetric placement of the air inlet and outlet mechanisms of the foregoing embodiments, such as the first one-way valve, the second one-way valve, the inlet duct, the outlet duct, the outlet tunnel, and the outlet duct, in the diving mask is the best mode. For simplicity and ease of understanding, only one of them is illustrated. This does not mean that its number is limited.Any kind of breathing tube is feasible provided that it can exchange air for the pad body with the outside air when its tip is above the water surface and can block the air exchange when its tip is below the water surface. A dry schnorchel is the best choice, but is not limited to the shape or exact location at which it is on top of the diving mask body.The head tapes as described are all similar to those shown in FIG. 2A, but are not limited in shape and are not shown in the drawings of the present invention so as not to obstruct the other elements whose visibility is required for description.Said two first one-way valves are preferably arranged symmetrically on the partition or on both sides of the partition. The task of installing the second one-way valve is to make the air inlet and outlet air flows further independent, whereby when the user breathes, the small amount of air that has accumulated in the outlet duct is not mixed with the clean air in the next inhalation cycle. That is, the provision of the second one-way valve is not absolutely necessary.The main frame and the lens are not limited to shielding only the eyes of the user, but it is also feasible to shield both the eyes and the nose of the user. Furthermore, the case that the viewing pane covers only the eyes is not limited to a single viewing pane bridging left and right, but two independent viewing panes left and right are likewise conceivable.The third one-way valve is not limited to being located at the lower portion, and may be located at any position of the nose connection portion, provided that the liquid in the nose connection portion can be prevented from flowing back into the lower chamber. Likewise, the installation of the third one-way valve is not absolutely necessary.The three-way connector and the guide surface are not limited to any shape.The first, second, and third one-way valves are not limited to any shape. They may be selected from any mushroom-shaped (circular), pivotable (mostly square) or other valve device capable of providing one-way fluid communication.Said waterproof seal surround does not necessarily have to be formed integrally. It is also feasible that, for example, the protruding portion and the lower portion of the nasal covering portion are configured by two separate components, or that the three-way connector and the nasal covering portion are separate components, provided that a considerable capacity of water tightness exists therebetween after assembly.Said nasal covering portion made of the softer material mainly has a secondary function allowing the user to compress the nose, for example to perform Frenzel compensation.List of reference characters1,5 Diving mask 10, 20, 30, 60 Breathable mask 2, 4, 12, 22, 32, 62 Breathing tube 3 Headband 6 Tunnel 7 Nose pocket 8, 151, 251, 351, 651 Nasal covering portion 11, 21, 31, 61 Body 121, 221, 321, 621 Inlet line 122, 222, 322, 622 Outlet line 13, 23, 33, 63 Main frame 14, 24, 34, 64 Sight glass 141, 241, 341, 641 Peripheral edge 15, 25, 35, 65 Waterproof sealing enclosure 152, 252, 352, 652 Protruding region 153, 253, 353, 653 Lower region 16, 26, 36, 66 Partition 161, 261, 361, 661 First one-way valve 162, 262, 362, 662 Second one-way valve 263, 363, 663 Third one-way valve 17, 27, 37, 67 Upper chamber 18, 28, 38, 68 Lower chamber 19, 29, 39, 69 Outlet tunnel 280, 381, 681 Nose connecting portion 284, 384, 684 Flushing valve 291, 391 inlet 292 side wall 380, 480, 580, 680 three-way connector 382, 682 mouth portion 383, 583, 683 drain portion 385 flexible portion 485 independent flexible portion 486 folded side wall 685 base 687 first connecting portion 688 second connecting portion 690 guide surface 691 snap-connected 692 gap 695 guide ribs 398, 698 mouthpiece (N) nose of user (M) mouth of user (P) water pressure

Claims

A breathable mask (10) comprising a body (11) and a breathing tube (12), the breathing tube (12) being in fluid communication with an interior of the body (11); the breathing tube (12) including an inlet conduit (121) and an outlet conduit (122) adjacent the inlet conduit (121), the body (11) including: a main frame (13); a lens (14) mounted in the main frame (13); a waterproof seal enclosure (15) partially mounted on the main frame (13) and the lens (14), the waterproof seal enclosure (15) being suitable for mounting on a user's face; wherein the waterproof seal enclosure (15) has a partition (16) that divides the inside of the body (11) into an upper chamber (17) and a lower chamber (18), whereby when a user wears the breathable mask (10) via a fastening device, the partition sits on the nose of the user and the eyes of the user are accommodated in the upper chamber (17) while the nose of the user is accommodated in the lower chamber (18); characterized in that the lens (14) covers only the eyes of the user, the waterproof seal enclosure (15) further includes a nose covering portion (151) that defines the lower chamber (18) together with the partition (16); wherein the nasal covering portion (151) has a protruding portion (152) and a lower portion (153) corresponding to the nostrils of the user, the body (11) further comprises: an inlet duct formed between the inlet duct and the lower chamber (18) and comprising a first one-way valve (161), wherein the first one-way valve (161) is arranged at the partition (16) and the first one-way valve (161) is provided such that external fresh air can enter the lower chamber (18) through the inlet duct; an outlet duct formed between the outlet duct and the lower chamber (18), and wherein the outlet duct is provided such that air exhaled by the user can pass through and be discharged to the outside; wherein the inlet duct and the outlet duct have a fluid flow independent of each other, wherein the breathable mask (10) does not cover the mouth of a user.The breathable mask of claim 1, wherein the nasal covering portion (151) is made of a hard material having a Shore D hardness of 50-90 selected from polycarbonate (PC), polypropylene (PP), polyethylene (PE), polyvinyl chloride (PVC), acrylonitrile-butadiene-styrene copolymer (ABS), or combinations thereof.The breathable mask according to claim 1, wherein the nasal covering portion (151) is made of a softer material having a Shore A hardness of 30-95, and the protruding portion gently extends forward from a rear edge of the main frame (13) to form a cross section having a mountain shape with a single comb.The breathable mask according to claim 3, wherein the cross section has a maximum height (Nh) in the range of 20 mm to 35 mm.The breathable mask according to claim 3, wherein the protruding portion protrudes forward from the rear edge of the main frame (13) to go beyond a lower outer edge of the main frame (13) by a maximum extension (Nt) in the range between 5 mm and 20 mm.A breathable mask (20) comprising a body (21) and a breathing tube (22), the breathing tube (22) being in fluid communication with an interior of the body; the breathing tube (22) including an inlet conduit (221) and an outlet conduit (222) adjacent the inlet conduit (221), the body (21) including: a main frame (23); a lens (24) mounted in the main frame (23); a waterproof seal enclosure (25) partially mounted on the main frame (23) and the lens (24), the waterproof seal enclosure (25) being suitable for mounting on a user's face; wherein the waterproof seal enclosure (25) has a partition (26) that divides the interior of the body into an upper chamber (27) and a lower chamber (28), whereby when a user wears the breathable mask via a fastening device, the partition (26) sits on the nose of the user and the eyes of the user are accommodated in the upper chamber (27) while the nose of the user is accommodated in the lower chamber (28); characterized in that the lens (24) covers only the eyes of the user, the waterproof seal enclosure (25) further includes a nose covering portion (251) that defines the lower chamber (28) together with the partition (26); wherein the nasal covering portion (251) has a protruding portion (252) and a lower portion (253) corresponding to the nostrils of the user, and the body further includes: an inlet duct formed between the inlet duct and the lower chamber and comprising a first one-way valve (261), wherein the first one-way valve (261) is provided to allow external fresh air to enter the lower chamber (28) through the inlet duct; an outlet duct formed between the outlet duct and the lower chamber (28), and wherein the outlet duct is provided to allow air exhaled by the user to pass through and be discharged to the outside; a nose connection portion (280) having one end in fluid communication with the lower chamber (28), the other end being provided with a flush valve (284), the breathable mask (20) not covering a user's mouth.The breathable mask of claim 6, wherein the nose connection portion (280) is in fluid communication with the lower chamber (28) via the lower region.The breathable mask of claim 7, wherein the lower region comprises a third one-way valve (263) that only allows liquid to pass from the lower chamber (28) into the nose connection portion (280); whereby when the user exhalations through the nose, a portion of the air passes through the third one-way valve (263) and is discharged to the outside through the purge valve (284) of the nose connection portion (280).The breathable mask of claim 6, wherein the nasal covering portion (251) and the nasal connecting portion (280) are made of a hard material having a Shore D hardness of 50-90 selected from polycarbonate (PC), polypropylene (PP), polyethylene (PE), polyvinyl chloride (PVC), acrylonitrile butadiene styrene copolymer (ABS), or combinations thereof.The breathable mask according to claim 6, wherein the nasal covering portion (251) is made of a softer material having a Shore A hardness of 30-95, and the protruding portion extends slightly forward from a rear edge of the main frame (23) to form a cross section having a mountain shape with a single comb.The breathable mask of claim 10, wherein the cross section has a maximum height (Nh) in the range of 20 mm to 35 mm.The breathable mask according to claim 10, wherein the protruding portion protrudes forward from the rear edge of the main frame (23) to go beyond a lower outer edge of the main frame (23) by a maximum extension (Nt) in the range between 5 mm and 20 mm.A breathable mask (30, 60) comprising a body (31, 61) and a breathing tube (32, 62), the breathing tube (32, 62) being in fluid communication with an interior of the body; the breathing tube (32, 62) including an inlet conduit (321, 621) and an outlet conduit (322, 622) adjacent the inlet conduit, the body including: a main frame (33, 63); a lens (34, 64) mounted in the main frame; a waterproof seal enclosure (35, 65) partially mounted to the main frame and the lens (34, 64), the waterproof seal enclosure (35, 65) being suitable for mounting to a user's face; wherein the waterproof seal enclosure (35, 65) has a partition (36, 66) that divides the interior of the body into an upper chamber (37, 67) and a lower chamber (38, 68), whereby when a user wears the breathable mask via a fastening device, the partition (36, 66) sits on the nose of the user and the eyes of the user are accommodated in the upper chamber while the nose of the user is accommodated in the lower chamber (38, 68); characterized in that the body further includes: an inlet duct formed between the inlet duct (361, 661) and the lower chamber (38, 68) and comprising a first one-way valve, the first one-way valve being provided for allowing external fresh air to enter the lower chamber through the inlet duct; an exhaust duct formed between the exhaust duct and the lower chamber, the exhaust duct being provided for air exhaled by the user to pass therethrough and be discharged to the outside; a three-way connector (380, 480, 580, 680) having a nose connection portion (381, 681), a mouth portion (382, 682) and a drain portion (383, 583, 683) in fluid communication with each other, the nose connection portion (381, 681) being in fluid communication with the lower chamber (38, 68), whereby when the user sets the breathable mask, the mouth portion (382, 682) is adapted to be received in the mouth of the user.The breathable mask according to claim 13, wherein the drain portion is adapted for drain and outlet downward and forward.The breathable mask of claim 13, further comprising a second one-way valve (362, 662), wherein the inlet channel is defined by the upper chamber (37, 67) and the first one-way valve (361, 661), and the outlet channel is defined by the second one-way valve and an outlet tunnel (39, 69); wherein the outlet tunnel is formed by the waterproof seal enclosure (35, 65) together with a peripheral edge (341, 641) of the lens (34, 64).The breathable mask of claim 15, wherein the first one-way valve (361) is disposed on the partition (36), and the second one-way valve (362) is disposed (39) at an entrance (391) of the outlet tunnel; when the user inhales through the nose, the fresh air from the inlet pipe (321) passes through the upper chamber (37) and the first one-way valve enters the lower chamber (38) to be supplied to the nose (N) of the user for inhalation; when the user exhalation through the nose, a part of the air passes through the second one-way valve, enters the outlet pipe (322) through the outlet tunnel (39), and is discharged to the outside.The breathable mask of claim 14, wherein the waterproof seal enclosure (35) further includes a nasal covering portion (351) that defines the lower chamber (38) together with the partition (36); the nasal covering portion having a protruding portion (352) and a lower portion (353) corresponding to the nostrils of the user.The breathable mask of claim 17, wherein the nose connection portion (381) is in fluid communication with the lower chamber via the lower region.The breathable mask of claim 18, wherein the nose connection portion and the lower region are provided with a flexible portion (385) therebetween to promote a movable region of the three-way connector (380).The breathing mask of claim 19, wherein the lower region comprises a third one-way valve (363) that only allows liquid to pass from the lower chamber (38) into the nose connection portion (381); whereby when the user inhales through the mouth, the fresh air passes through the third one-way valve and the mouth portion (382) to be supplied to the user; when the user exhalations through the nose, the air passes through the third one-way valve and the nose connection portion, and is discharged to the outside through a purge valve (384) of the drain portion; when the user exhalations through the mouth, the air is discharged to the outside through the purge valve, and water accumulated in the three-way connector is forced out through the purge valve.The breathable mask according to claim 13, wherein the drain and outlet of the drain portion (583, 683) are downward and sideways.The breathable mask of claim 14, further comprising a second one-way valve (662), wherein the inlet channel is defined by the upper chamber (67) and the first one-way valve (661), and the outlet channel is defined by the second one-way valve and an outlet tunnel (69); wherein the outlet tunnel is formed by the waterproof sealing enclosure (65) together with a peripheral edge (641) of the lens (64).The breathable mask of claim 14, wherein the drain portion (683) includes a base (685) extending downwardly from the nose connection portion, the base having a first connection portion (687) and the second connection portion (688) opposite the first connection portion, the first connection portion adapted to accommodate a purge valve (684) secured therein, and the mouth portion (682) is collectively defined by the second connection portion and a mouthpiece (698) secured thereto.The breathable mask of claim 23, wherein the drain portion further includes a baffle (690), wherein the baffle, the purge valve, and the first connection portion together define the drain portion, the baffle extends downwardly from the nose connection portion and faces the purge valve, and the baffle and the purge valve are snap-connected (691) to form a gap (692) therebetween; when the user exhalation, the air or accumulated water is laterally discharged through the gap.The breathable mask of claim 17, wherein the nasal covering portion and the nasal connecting portion are made of a hard material having a Shore D hardness of 50-90 selected from polycarbonate (PC), polypropylene (PP), polyethylene (PE), polyvinyl chloride (PVC), acrylonitrile butadiene styrene copolymer (ABS), or combinations thereof.The breathable mask according to claim 17, wherein the nasal covering portion is made of a softer material having a Shore A hardness of 30-95, and the protruding portion extends slightly forward from a rear edge of the main frame (33, 63) to form a cross section having a mountain shape with a single comb.The breathable mask of claim 26, wherein the cross section has a maximum height (Nh) in the range of 20 mm to 35 mm.The breathable mask according to claim 26, wherein the protruding portion protrudes forward from the rear edge of the main frame (33, 63) to go beyond a lower outer edge of the main frame (33, 63) by a maximum extension (Nt) in the range between 5 mm and 20 mm.

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