Snorkeling mask

Abstract

The present invention provides a snorkeling mask, comprising a mask body and a breathing tube, wherein the interior of the breathing tube is in fluid communication with the interior of the mask body. The mask body comprises a breathing section and an observation section arranged separately, and a gap is provided between the breathing section and the observation section for exposing the zygomatic skin; the breathing tube is in communication with the breathing section and is arranged in a bent, neck-wrapping and rear-mounted manner, so that the breathing section is in direct fluid communication with the outside, thereby reducing the overall weight of the snorkeling mask, decreasing airflow dead zones and making it easier for the user to breathe.

Description

CROSS REFERENCE TO RELATED APPLICATIONS

[0001] The present application claims the benefit of Chinese Patent Application Nos. 202620330077.3 filed on Mar. 17, 2026 and 202510385333.9 filed on Mar. 28, 2025. All the above are hereby incorporated by reference in their entirety.TECHNICAL FIELD

[0002] The present invention relates to the technical field of snorkeling auxiliary equipment, in particular to a snorkeling mask.BACKGROUND ART

[0003] A snorkeling mask is a diving equipment integrating a breathing tube and a mask design, which provides a more comfortable and safer underwater experience for divers.

[0004] Common snorkeling masks cover the entire face, such as full-face snorkeling masks, which cover the area from the eyebrows to the cheeks and then to the chin, including the eyes, nose and mouth, allowing natural breathing through the nose and mouth without holding the breathing tube in the mouth. The breathing tube is usually arranged on the top of the mask, and the breathing tube is in fluid communication with the inside of the snorkeling mask and the outside, allowing outside air to enter the snorkeling mask for the user to breathe, and at the same time allowing carbon dioxide produced by the breathing of the user to be discharged to the outside through the breathing tube, so that the user can realize a breathing cycle underwater without holding breath.

[0005] However, full-face snorkeling masks cover the entire face, resulting in a relatively large product volume and heavy weight, which diminishes the wearing experience of the user. Meanwhile, the total space of a full-face snorkeling mask for accommodating fluid (e.g., air) is relatively large, thereby holding a greater amount of carbon dioxide or oxygen. When a user dives underwater for a period of time, since the interior of the full-face snorkeling mask is in a sealed state, the concentration of carbon dioxide inside the mask increases, and the total amount of carbon dioxide becomes substantial. Consequently, the user is likely to feel unable to breathe or have difficulty in breathing, which degrades the snorkeling experience of the user. When the user dives and the top end of the breathing tube is just at the water-gas interface, a small amount of water drops may be entrained into the downstream section of the breathing tube at the moment when the float valve performs a sealing action. These accidentally introduced water drops will directly enter the breathing cavity with the inhalation airflow and may be inhaled by the user, leading to choking, which seriously affects the comfort and safety of use, and may even cause danger.

[0006] Therefore, how to set the shape and structure of the snorkeling mask to reduce the mask volume and internal air capacity to improve the snorkeling experience of the user, and how to set the snorkeling mask to separate and discharge the trace liquid water that may be mixed into the breathing airflow to ensure that the gas entering the mouth and nose of the user is dry and clean, thereby preventing the occurrence of choking accidents, have become urgent technical problems to be solved.SUMMARY OF THE INVENTION

[0007] A major object of the present invention is to provide a snorkeling mask, aiming to solve the technical problem of how to reduce the mask volume and internal air capacity to improve the snorkeling experience of the user, and the technical problem of how to separate and discharge the liquid water entering the breathing tube out of the mask body to avoid the liquid water directly entering the breathing cavity with the breathing airflow.

[0008] To achieve the above object, in a first aspect, the present invention provides a snorkeling mask, comprising a mask body and a breathing tube, wherein the interior of the breathing tube is in fluid communication with the interior of the mask body. The mask body comprises a breathing section and an observation section, wherein the breathing section and the observation section are arranged separately, and a gap is provided between the breathing section and the observation section for exposing the zygomatic skin of human; the breathing tube is in communication with the breathing section and is arranged in a bent, neck-wrapping and rear-mounted manner, so that the breathing section is in direct fluid communication with the outside.

[0009] To achieve the above object, in a second aspect, the present invention provides a snorkeling mask, comprising:

[0010] a mask body provided with a breathing cavity;

[0011] a breathing tube in communication with the breathing cavity, the top end of the breathing tube being provided with a buoyancy control valve;

[0012] a shunt housing arranged at the communication position of the breathing tube and the breathing cavity;

[0013] a confluence flow channel, a drainage flow channel and a bidirectional flow channel are formed in the shunt housing; one end of the confluence flow channel is in communication with the breathing tube, the other end of the confluence flow channel is respectively in communication with the drainage flow channel and the bidirectional flow channel, and the confluence flow channel is used for receiving fluid from the breathing tube and / or the bidirectional flow channel;

[0014] the drainage flow channel extends downward from the bottom of the confluence flow channel, and a one-way drainage valve is arranged at the tail end of the drainage flow channel, wherein the one-way drainage valve is used for discharging liquid out of the shunt housing;

[0015] the bidirectional flow channel extends out from one side of the confluence flow channel, and the tail end of the bidirectional flow channel is in communication with the breathing cavity, wherein the bidirectional flow channel is used for introducing gas into the breathing cavity and also for discharging gas and / or vapor out of the breathing cavity.

[0016] In the technical solution provided by the present invention, first, a gap is reserved between the breathing section and the observation section of the mask body; that is, first zygomatic adaptive cuts are formed on the left and right sides of the flexible mask, and are arranged in the area formed by the lower part of the observation cavity and the upper part of the breathing cavity; and a gap is reserved in the area formed by the lower part of the eye frame and the upper part of the oronasal frame of the support frame. Under the premise of ensuring the waterproof and airtight performance and the breathing air function of the snorkeling mask, the area covering the face of the user is reduced, the overall weight of the snorkeling mask is lightened, and only the necessary coverage area and breathing parts are reserved, so that the skin of the user has a sensing function and can be in direct contact with water, thereby improving the use experience of the user.

[0017] Second, the gap arranged between the breathing section and the observation section reduces the capacity of the air bag of the mask body 1. The reduction of the capacity of the air storage bag will make it difficult for the user to breathe if the breathing tube is provided with separate discharge and exhalation dual channels. However, the breathing tube of the present invention is in communication with the breathing section, which is a part for storing air, so that the breathing tube is in bidirectional fluid communication with the outside. The user inhales and exhales through the same breathing tube without using a dual-channel breathing tube with separate inhalation and exhalation for breathing during snorkeling, making the breathing of the user simpler during snorkeling and improving the use experience of the user during snorkeling.

[0018] Third, the breathing tube is of a neck-wrapping and rear-mounted design, and the bending angle formed by the extension line of the breathing tube joint and the extension line of the tubular body is about 110°, which is a bionic bending angle conforming to ergonomics. Different from the traditional front-mounted design of the breathing tube, the channel is extended to the back of the neck, and the breathing path of the snorkeling mask is optimized by using ergonomics. Besides, the air bag of the mask body is relatively flat and has smooth lines, and the curved surface of the breathing tube is smooth, thereby reducing the ineffective gas exchange space in the snorkeling mask, decreasing airflow dead zones, accelerating gas exchange rate, and preventing excessive accumulation of carbon dioxide in the air bag of the mask body, so that the user can breathe more easily and the use experience of the user during snorkeling is improved.

[0019] Fourth, the mask further includes an anti-choking structure arranged at the communication node of the breathing tube and the breathing cavity. The anti-choking structure includes a shunt housing in which a confluence flow channel, a drainage flow channel and a bidirectional flow channel are formed.

[0020] The confluence flow channel has a water / gas inlet in communication with the breathing tube, for receiving fluid from the breathing tube. The drainage flow channel extends downward from the bottom of the confluence flow channel, and a one-way drainage valve is connected to the terminal end of the drainage flow channel for discharging liquid. The bidirectional flow channel extends out from one side of the confluence flow channel, with its terminal end in communication with the breathing cavity for introducing gas.

[0021] All fluid (air and possibly contained water) in the breathing tube first enters the confluence flow channel. Then, in the confluence flow channel, the liquid sinks due to gravity and exits the snorkeling mask from the drainage flow channel at the bottom; the gas is sucked out from the bidirectional flow channel at the side. The two flow channels are spatially isolated, which can separate and discharge the trace liquid water that may be mixed into the breathing air flow, ensuring that the gas entering the mouth and nose of the user is dry and clean, thereby preventing the occurrence of choking accidents.

[0022] The bidirectional flow channel extends out from one side of the confluence flow channel, and the tail end of the bidirectional flow channel is in communication with the breathing cavity for introducing gas. During snorkeling, water drops may be generated on the inner wall of the breathing tube due to water vapor produced by user respiration due to temperature or other external reasons. These water drops can also flow out to the confluence flow channel through the bidirectional flow channel, and finally exit the snorkeling mask through the drainage flow channel at the bottom, further improving the safety of the snorkeling mask and effectively preventing choking accidents.BRIEF DESCRIPTION OF THE DRAWINGS

[0023] One or more examples are exemplarily illustrated by corresponding drawings, which do not constitute limitations to the examples. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise specified, figures in the drawings do not constitute a scale limitation.

[0024] FIG. 1 is a schematic structural diagram of the snorkeling mask disclosed in one or more examples of the present application;

[0025] FIG. 2 is an exploded structural diagram of the snorkeling mask disclosed in one or more examples of the present application;

[0026] FIG. 3 is a schematic diagram illustrating the range of the observation section of the snorkeling mask disclosed in one or more examples of the present application;

[0027] FIG. 4 is a schematic diagram illustrating the range of the breathing section of the snorkeling mask disclosed in one or more examples of the present application;

[0028] FIG. 5 is a schematic structural diagram of a side view of the snorkeling mask disclosed in one or more examples of the present application;

[0029] FIG. 6 is a schematic structural diagram of the flexible mask disclosed in one or more examples of the present application;

[0030] FIG. 7 is a front view of the flexible mask disclosed in one or more examples of the present application;

[0031] FIG. 8 is a rear view of the flexible mask disclosed in one or more examples of the present application;

[0032] FIG. 9 is a schematic structural diagram of a side view of the flexible mask disclosed in one or more examples of the present application;

[0033] FIG. 10 is a schematic structural diagram of the support frame disclosed in one or more examples of the present application;

[0034] FIG. 11 is a schematic structural diagram of a side view of the support frame disclosed in one or more examples of the present application;

[0035] FIG. 12 is a schematic structural diagram of the mouth expanding frame disclosed in one or more examples of the present application;

[0036] FIG. 13 is a schematic structural diagram of the mouth expanding frame from another angle disclosed in one or more examples of the present application;

[0037] FIG. 14 is a schematic structural diagram of the flexible mask assembled with the eye expanding frame and lens disclosed in one or more examples of the present application;

[0038] FIG. 15 is an enlarged schematic diagram of part A in FIG. 14;

[0039] FIG. 16 is a schematic structural diagram of the flexible mask disclosed in one or more examples of the present application;

[0040] FIG. 17 is an enlarged schematic diagram of part B in FIG. 16;

[0041] FIG. 18 is a schematic structural diagram of the flexible mask part assembled with the eye expanding frame disclosed in one or more examples of the present application;

[0042] FIG. 19 is an enlarged schematic diagram of part C in FIG. 18;

[0043] FIG. 20 is a schematic structural diagram of the breathing tube disclosed in one or more examples of the present application;

[0044] FIG. 21 is a schematic structural diagram of the breathing tube from another angle disclosed in one or more examples of the present application;

[0045] FIG. 22 is an enlarged schematic diagram of part D in FIG. 21;

[0046] FIG. 23 is a schematic cross-sectional structural diagram of the breathing cavity of the snorkeling mask assembled with the breathing tube disclosed in one or more examples of the present application;

[0047] FIG. 24 is a schematic cross-sectional structural diagram of the observation chamber of the snorkeling mask after assembly disclosed in one or more examples of the present application;

[0048] FIG. 25 is a schematic structural diagram of the snorkeling mask worn by a user disclosed in one or more examples of the present application;

[0049] FIG. 26 is a schematic structural diagram of the snorkeling mask disclosed in one or more examples of the present application;

[0050] FIG. 27 is an exploded structural diagram of the snorkeling mask disclosed in one or more examples of the present application;

[0051] FIG. 28 is a front view of the snorkeling mask in one or more examples of the present application;

[0052] FIG. 29 is a side view of the snorkeling mask in one or more examples of the present application;

[0053] FIG. 30 is a schematic structural diagram of the shunt housing in one or more examples of the present application;

[0054] FIG. 31 is a schematic cross-sectional diagram of the shunt housing in one or more examples of the present application;

[0055] FIG. 32 is another schematic structural diagram of the shunt housing in one or more examples of the present application;

[0056] FIG. 33 is an exploded view of the breathing tube of the snorkeling mask in one or more examples of the present application;

[0057] FIG. 34 is a schematic structural diagram of the breathing tube of the snorkeling mask in one or more examples of the present application;

[0058] FIG. 35 is a schematic diagram illustrating liquid flow in the breathing tube of the snorkeling mask in one or more examples of the present application;

[0059] FIG. 36 is a schematic diagram illustrating gas and / or vapor flow in the breathing tube of the snorkeling mask in one or more examples of the present application.

[0060] In the drawings: 01-breathing section; 02-observation section; 1-mask body; 11-support frame; 111-eye frame; 1111-first clamping projection; 1112-lens clamping edge; 112-nose bridge support part; 113-oronasal frame; 1131-third clamping flange; 1132-mouth support baffle; 1133-breathing cavity connection wall; 11331-first clamping projection; 1134-breathing tube plug; 11341-plug through hole; 11342-second sealing ring; 11343-second sealing groove; 1135-one-way drainage valve; 1136-pin seat; 114-forehead female spigot; 12-flexible mask; 121-observation cavity; 1211-eye connection opening; 1212-first clamping flange; 1213-first clamping annular groove; 1214-lens fixing table; 1215-eye fitting opening; 12151-eye support skirt; 12152-eye isolation wall; 1216-forehead male spigot; 122-breathing cavity; 1221-mouth connection opening; 12211-fixing tongue; 12212-bridging fixing groove; 1222-second clamping flange; 12221-second clamping groove; 1223-third clamping annular groove; 1224-mouth-nose fitting opening; 12241-mouth support skirt; 12242-mouth isolation wall; 1225-breathing through hole; 1226-pressure-balancing bump; 123-first zygomatic adaptive cut; 1231-cut isolation wall; 124-cavity partition; 13-eye expanding frame; 131-first clamping groove; 14-mouth expanding frame; 141-second clamping annular groove; 142-bridging beam; 2-breathing tube; 21-breathing tube joint; 211-first sealing ring; 212-first sealing groove; 22-tubular body; 23-buoyancy control valve; 3-lens; 4-elastic band; 5-strap buckle; 6-buckle fixing ear; 7-shunt housing; 71-confluence flow channel; 72-drainage flow channel; 73-bidirectional flow channel.DETAILED DESCRIPTION OF THE INVENTION

[0061] For the convenience of understanding the present invention, the present invention will be described in more detail below with reference to the drawings and specific examples. It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element, or one or more intermediate elements may exist therebetween. When an element is referred to as being "connected to" another element, it may be directly connected to the other element, or one or more intermediate elements may exist therebetween. The terms "vertical", "horizontal", "left", "right", "inner", "outer" and similar expressions used in this description are for illustrative purposes only. In the depiction of the present invention, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating relative importance or implicitly indicating the number of the indicated technical features. Thus, unless otherwise specified, the features defined with "first" and "second" may explicitly or implicitly include one or more of the features; "plural" means two or more. The term "comprising" and any variations thereof mean non-exclusive inclusion, and one or more other features, integers, steps, operations, units, components and / or combinations thereof may be present or added.

[0062] In addition, unless otherwise clearly specified and limited, the terms "install", "link" and "connect" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection, an indirect connection through an intermediate medium, or internal communication between two elements. All technical and scientific terms used in this description have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs. The terms used in the description of the present invention are only for the purpose of describing specific examples, rather than limiting the present invention. The term "and / or" used in this description includes any and all combinations of one or more of the listed related items.

[0063] In addition, the technical features involved in the different examples of the present invention described below can be combined with each other as long as they do not conflict with each other. Firstly, it should be noted that since the elastic band for fixing the head of the user and the snorkeling mask body is easy to block or interfere with some important components and affect the depiction, it is omitted in the drawings except for FIGS. 25 and 26.

[0064] Example 1

[0065] To achieve the above object, this example of the present invention provides a snorkeling mask. Referring to FIGS. 1-27, FIG. 1 is a schematic structural diagram of the snorkeling mask in one or more examples. Specifically, the snorkeling mask comprises a mask body 1 and a breathing tube 2, wherein the interior of the breathing tube 2 is in fluid communication with the interior of the mask body 1. The mask body 1 comprises a breathing section 01 and an observation section 02, which are arranged separately, and a gap is provided between the breathing section 01 and the observation section 02 for exposing the zygomatic skin of human; the breathing tube 2 is in communication with the breathing section 01 and is arranged in a bent, neck-wrapping and rear-mounted manner, so that the breathing section 01 is in direct fluid communication with the outside.

[0066] Herein, the breathing section 01 is a part where the user breathes underwater through the snorkeling mask, and the observation section 02 is a part where the user observes underwater through the snorkeling mask.

[0067] When the upper end of the breathing tube 2 is exposed above the water surface, the breathing tube is in communication with the outside, so that gas exchange can be performed in the mask body 1; when the upper end of the breathing tube 2 is submerged below the water surface, the upper end of the breathing tube 2 is closed to isolate the entry of external fluid, so that no water enters the mask body 1 and the air in the mask body 1 is not lost. The user can realize gas exchange underwater by controlling the rising and sinking of the breathing tube 2.

[0068] When a human exhales and inhales, the channel for discharging gas and the channel for inhaling gas are the common breathing tube 2, i.e., a "one tube for breathing".

[0069] In this example, the gap arranged between the breathing section 01 and the observation section 02 reduces the capacity of the air bag of the mask body 1. The reduction of the capacity of the air storage bag will make it difficult for the user to breathe if the breathing tube 2 is provided with separate discharge and exhalation dual channels. However, the breathing tube 2 of the present invention is in communication with the breathing section 01, which is a part for storing air, so that the breathing tube 2 is in bidirectional fluid communication with the outside. The user inhales and exhales through the same breathing tube 2 without using a dual-channel breathing tube 2 with separate inhalation and exhalation for breathing during snorkeling, making the breathing of the user simpler during snorkeling and improving the use experience of the user during snorkeling.

[0070] The mask body 1 comprises a support frame 11 and a flexible mask 12.

[0071] The flexible mask 12 includes an observation cavity 121 and a breathing cavity 122 which are connected to each other, wherein the observation cavity 121 wraps the periphery of the eyes, the breathing cavity 122 wraps the periphery of the mouth and nose, and the zygomatic part of the human is exposed.

[0072] The support frame 11 includes an eye frame 111, a nose bridge support part 112 and an oronasal frame 113, wherein the eye frame 111 and the oronasal frame 113 are connected through the nose bridge support part 112, and a large gap is reserved between the eye frame 111 and the oronasal frame 113.

[0073] The support frame 11 consists only of the eye frame 111, the nose bridge support part 112, and the oronasal frame 113. Compared to full-face snorkeling masks, the coverage area on both sides of the cheeks and the forehead is removed, reducing the overall weight of the snorkeling mask. Users will not feel excessively heavy during snorkeling or carrying, further improving the user experience.

[0074] The support frame 11 is integrally supported by a rigid material and can be made of common rigid materials such as PC, PE, PS, PP, etc., ensuring that the support frame 11 has certain resistance to water pressure and can support the flexible mask 12, making the flexible mask 12 fit the facial contour of the user better.

[0075] Specifically, the breathing cavity 122 can simultaneously accommodate human nose and mouth, and the observation cavity 121 can accommodate human eyes and skin surrounding the eyes.

[0076] Specifically, first zygomatic adaptive cuts 123 are provided inwardly on the left and right sides of the middle portion of the flexible mask 12, are disposed between the breathing cavity 122 and the observation cavity 121 and are used to fit closely against the skin excluding the zygoma. The edges of the first zygomatic adaptive cuts 123 are provided with cut isolation walls 1231 for sealing and waterproofing. The cut isolation walls 1231 can fit tightly against the skin excluding the zygoma of the user, exposing the zygomatic skin in direct contact with the external environment.

[0077] A cavity partition 124 is arranged at the upper part of the rear end of the flexible mask 12, and at the joint between the observation cavity 121 and the breathing cavity 122. The cavity partition 124 can expand the nose portion of the breathing cavity 122, leaving a certain space to accommodate the nose of the user.

[0078] Specifically, the cavity partition 124 is arranged in an inverted V shape; the height of the cavity partition 124 gradually decreases from top to bottom, further conforming to the contour and skin of human nose, thereby further improving the use experience of the user.

[0079] A nose fitting convex surface is arranged at the upper part of the front end of the breathing cavity 122, and a nose fitting cavity is on the back of the nose fitting convex surface and fits the contour of the user's nose; several pressure-balancing bumps 1226 are arranged on the left and right side surfaces of the nose fitting convex surface, which are used for the user to press to balance the pressure between the nose and ears during underwater snorkeling; since the surface of the underwater snorkeling mask is relatively slippery, the pressure-balancing bumps 1226 can increase the friction between the snorkeling mask and the user's fingers, making it easier for the user to press the nose through the snorkeling mask to achieve ear-nose balance.

[0080] The front end of the flexible mask 12 is fixed to the back of the support frame 11, and the back of the flexible mask 12 fits against the facial skin of the user.

[0081] The front end of the flexible mask 12 is fixed to the back of the support frame 11 by: clamping the eye frame 111 to the observation cavity 121, and clamping the nose bridge support part 112 and the oronasal frame 113 respectively to the breathing cavity 122.

[0082] The eye frame 111 is clamped to the observation cavity 121 by: the front end of the observation cavity 121 including an eye connection opening 1211, the mask body 1 further comprising an eye expanding frame 13, wherein the eye expanding frame 13 is sleeved at the eye connection opening 1211, and the eye frame 111 is clamped to the eye expanding frame 13.

[0083] The eye frame 111 is clamped to the eye expanding frame 13 by: the rear end of the eye frame 111 being provided with several first clamping projections 1111, an outer periphery of the eye expanding frame 13 being provided with several first clamping grooves 131, wherein the first clamping projections 1111 is clamped into the first clamping groove 131.

[0084] The eye expanding frame 13 is sleeved at the eye connection opening 1211 by: the front edge of the eye connection opening 1211 extending forward to form a first clamping flange 1212; a first clamping annular groove 1213 being provided on the outer periphery of the first clamping flange 1212, wherein the eye expanding frame 13 is sleeved at the first clamping annular groove 1213.

[0085] A lens fixing table 1214 extends inward from the inner wall of the first clamping flange 1212, and the lens 3 is fixed on the lens fixing table 1214;

[0086] A lens clamping edge 1112 extends inward from the periphery of the eye frame 111, and the lens clamping edge 1112 presses against the lens 3.

[0087] A forehead male spigot 1216 is provided at the upper front end of the observation cavity 121. The support frame 11 comprises a forehead female spigot 114, which is disposed at the upper part of the eye frame 111. The forehead female spigot 114 is inserted into the forehead male spigot 1216, so as to fix the upper part of the eye frame 111 of the support frame 11 to the upper front end of the observation cavity 121. Specifically, the forehead male spigot 1216 may be filled with an adhesive to fix the forehead female spigot 114 at the forehead male spigot 1216, further improving the sealing of the snorkeling mask. This ensures the sealing performance of the snorkeling mask while reducing its overall volume and weight, thereby further improving the user experience.

[0088] The nose bridge support part 112 and the oronasal frame 113 are respectively clamped to the breathing cavity 122 by: a front end of the breathing cavity 122 comprising a mouth connection opening 1221, wherein a front edge of the mouth connection opening 1221 extends inwardly to form a second clamping flange 1222; an outer peripheral edge of the oronasal frame 113 being provided with a third clamping flange 1131, wherein the second clamping flange 1222 is clamped to the third clamping flange 1131.

[0089] Several second clamping grooves 12221 are provided at the front end of the outer periphery of the second clamping flange 1222. Several first clamping projections 11331 are provided inside the third clamping flange 1131. The first clamping projections 11331 are inserted into the second clamping grooves 12221 to improve the connection stability between the nose bridge support part 112 and the oronasal frame 113, further enhancing the sealing and waterproofing of the snorkeling mask.

[0090] The shape, quantity, and position of the first clamping projections 11331 match those of the second clamping grooves 12221.

[0091] The oronasal frame 113 protrudes forward to form a mouth support baffle 1132. A breathing cavity connection wall 1133 extends rearward from the periphery of the mouth support baffle 1132. A third clamping annular groove 1223 is provided on the outer periphery of the front end of the mouth connection opening 1221, and the breathing cavity connection wall 1133 is sleeved at the third clamping annular groove 1223.

[0092] A one-way drainage valve 1135 is provided at the front end of the oronasal frame 113.

[0093] A pin seat 1136 for fixing external shooting equipment is provided at the lower end of the oronasal frame 113, which can be used to connect an underwater camera.

[0094] The mask body 1 further comprises a mouth expanding frame 14, wherein the mouth expanding frame 14 is clamped to the mouth connection opening 1221;

[0095] Specifically, the mouth expanding frame 14 is clamped to the mouth connection opening 1221 by: a second clamping annular groove 141 being provided on the outer peripheral edge of the mouth expanding frame 14, wherein the second clamping flange 1222 is clamped to the second clamping annular groove 141 to clamp the mouth expanding frame 14 at the mouth connection opening 1221.

[0096] Specifically, the front and rear groove walls of the second clamping annular groove 141 are located at the front and rear ends of the second clamping flange 1222 respectively, equivalent to the second clamping annular groove 141 "clamping" the second clamping flange 1222. Adhesive may be filled within the second clamping annular groove 141 to further fix the second clamping flange 1222 therein, which further improves the sealing of the snorkeling mask. Meanwhile, the mouth expanding frame 14 expands the mouth connection opening 1221 via the second clamping annular groove 141, making the mouth connection opening 1221 less prone to deformation. During snorkeling, the mask maintains a certain shape and does not deform or shift due to water pressure or external forces, further improving the sealing of the snorkeling mask and the user experience.

[0097] In this example, a gap is provided at the upper part of the mouth expanding frame 14, with the bottom of the gap being a bridging beam 142 that bridges the left and right sides of the mouth expanding frame 14. A fixing tongue 12211 extends downward from the upper part of the mouth connection opening 1221. A bridging fixing groove 12212 is provided at the rear end of the fixing tongue 12211. The bridging beam 142 is clamped into the bridging fixing groove 12212. Adhesive may be filled in the bridging fixing groove 12212 to further fix the bridging beam 142 therein, improve the connection stability between the mouth expanding frame 14 and the mouth connection opening 1221, thereby further enhancing the sealing of the snorkeling mask.

[0098] The back of the flexible mask 12 fits against the facial skin of the user by: a fitting opening being provided at the rear end of the flexible mask 12 for fitting against the user's facial skin, an isolation wall for sealing being provided at the edge of the fitting opening to fit closely against the face for realizing sealing effect, wherein the fitting opening comprises an eye fitting opening 1215 and a mouth-nose fitting opening 1224;

[0099] The rear end of the observation cavity 121 is provided with an eye fitting opening 1215, which fits against the skin surrounding the user's eyes;

[0100] The rear end of the breathing cavity 122 is provided with a mouth-nose fitting opening 1224, which fits against the skin surrounding the user's mouth and nose.

[0101] The eye fitting opening 1215 comprises an eye support skirt 12151 and an eye isolation wall 12152. The eye support skirt 12151 is disposed at the outer peripheral edge of the eye fitting opening 1215, and the eye isolation wall 12152 extends inwardly from the inner periphery of the eye support skirt 12151.

[0102] The mouth-nose fitting opening 1224 comprises a mouth support skirt 12241 and a mouth isolation wall 12242. The mouth support skirt 12241 is disposed at the outer peripheral edge of the mouth-nose fitting opening 1224, and the mouth isolation wall 12242 extends inwardly from the inner periphery of the mouth support skirt 12241.

[0103] The breathing tube 2 is in communication with the breathing cavity 122, and one end of the breathing tube 2 is clamped to the support frame 11.

[0104] The breathing tube 2 comprises a breathing tube joint 21. The oronasal frame 113 is provided with a breathing tube plug 1134, and the breathing tube plug 1134 is clamped to the breathing tube joint 21.

[0105] The breathing tube plug 1134 is hollow. One end of the breathing tube plug 1134 is connected to the breathing tube joint 21. The breathing tube plug 1134 is provided with a plug through hole 11341. The breathing cavity 122 is provided with a breathing through hole 1225, which communicates with the plug through hole 11341.

[0106] Several first sealing rings 211 are provided on the inner wall of the breathing tube joint 21, and first sealing grooves 212 are formed between adjacent first sealing rings 211;

[0107] Several second sealing rings 11342 are provided on the outer wall of the breathing tube plug 1134, and second sealing grooves 11343 are formed between adjacent second sealing rings 11342;

[0108] At least one first sealing ring 211 is clamped into one second sealing groove 11343, or at least one second sealing ring 11342 is clamped into one first sealing groove 212.

[0109] The breathing tube plug 1134 is disposed on at least one of the two sides of the oronasal frame 113. The number of the breathing tube plugs 1134 can be one or two. When there is one breathing tube plug 1134, it is disposed on the left or right side of the oronasal frame 113, facilitating the neck-wrapping and rear-mounted arrangement of the breathing tube 2 connected thereto. When there are two breathing tube plugs 1134, they can be disposed on the left and right sides of the oronasal frame 113 respectively. Correspondingly, the number of the breathing tubes 2 should also be two, consistent with the number of the breathing tube plugs 1134, facilitating the neck-wrapping and rear-mounted arrangement of the breathing tubes 2 connected thereto, extending the channel to the back of the neck, optimizing the breathing path of the snorkeling mask using ergonomics, and improving ventilation efficiency.

[0110] The breathing tube 2 further comprises a tubular body 22 and a buoyancy control valve 23. The buoyancy control valve 23 is disposed at the other end of the breathing tube 2. One end of the tubular body 22 is connected to the buoyancy control valve 23, and the other end of the tubular body 22 is connected to the breathing tube joint 21;

[0111] The connection point between the breathing tube joint 21 and the tubular body 22 is bent. The bending angle formed by the extension line of the breathing tube joint 21 and the extension line of the tubular body 21 is α: 100°≤α≤120°. When 100°≤α≤120°, the breathing tube is configured in a neck-wrapping and rear-mounted arrangement. Preferably, α is 110°. The bending angle formed by the extension line of the breathing tube joint and the extension line of the tubular body is about 110°, which is a bionic bending angle conforming to ergonomics. Different from the traditional front-mounted design of the breathing tube 2, the intake and exhaust channel is extended to the back of the neck, and the breathing path of the snorkeling mask is optimized by using ergonomics. Besides, the air bag of the mask body 1 is relatively flat and has smooth lines, and the curved surface of the breathing tube is smooth, thereby reducing the ineffective gas exchange space in the snorkeling mask, decreasing airflow dead zones, accelerating gas exchange rate, and preventing excessive accumulation of carbon dioxide in the air bag of the mask body 1, so that the user can breathe more easily and the use experience of the user during snorkeling is improved.

[0112] The breathing tube 2 is configured to be flexible. At least the tubular body 22 and the breathing tube joint 21 are flexible, or the entire breathing tube 2 may be flexible. The hardness of the breathing tube 2 is a Shore hardness of 80. It can be integrally molded from flexible materials such as silicone, polyurethane (PU), thermoplastic elastomer (TPE), etc., which combines flexibility, allowing the breathing tube to be folded for convenient storage, with sufficient rigidity to prevent deformation underwater that could affect airflow. Meanwhile, users can easily restore the breathing tube 2 from a folded state to an upright state for use.

[0113] The flexible configuration makes the breathing tube 2 easy to store and fold. Before use, the breathing tube can regain its shape, and it will not deform during underwater snorkeling, making it convenient to use and carry.

[0114] Full-face snorkeling masks typically have two configurations for the breathing pipeline. In one case, the breathing pipeline is set at the top of the mask. In this case, the face must bear the weight of the exhaled gas and the full-face mask, which reduces user comfort. Moreover, since the breathing pipeline needs to route from the mouth / nose area to the top exhaust pipe for ventilation, the path for gas inhalation and exhalation is longer, requiring the user to exert more strength to breathe. Compared to separate mouth-bite snorkeling masks, the advantages of the present invention are: the mask body is configured based on human facial contour, providing good fit; the cheeks and eyes are not affected by exhaled gas or fogging; the weight of the snorkeling mask is reduced; and the user's wearing experience is better. In the other case, the breathing tube is disposed on the left and right sides of the lower breathing cavity of the snorkeling mask, configured as a neck-wrapping and rear-mounted design, achieving a one-tube breathing setup. This shortens the path for gas inhalation and exhalation, making breathing easier for the user. Since the mask body is configured based on human facial contour, the amount of air stored in the breathing cavity of the snorkeling mask is smaller, and the amount of accumulated carbon dioxide is also relatively less, making it difficult for excessive carbon dioxide to accumulate. This makes the user feel that breathing is smoother and easier, enhancing the user experience. Meanwhile, since the amount of air stored in the breathing cavity of the snorkeling mask is smaller and the breathing tube is disposed on the left and right sides of the lower breathing cavity of the snorkeling mask, a one-way valve may not be required between the breathing tube and the breathing cavity. The user can directly perform timely exhalation and inhalation through the breathing tube, making breathing easier and improving the use experience.

[0115] Example 2

[0116] To achieve the above object, please refer to FIGS. 1-27. FIG. 26 is a schematic structural diagram of a snorkeling mask provided in the example of the present invention. Specifically, in addition to the content disclosed in Example 1, the snorkeling mask further comprises:

[0117] an elastic band 4 with adjustable length and strap buckles 5. The strap buckles 5 are respectively disposed on both sides of the upper and lower parts of the flexible mask 12. The adjustable elastic band 4 is fixed at the strap buckles 5. The strap buckles 5 are used to adjust the tightness of the elastic band 4. The elastic band 4 itself also has certain elasticity, further securing the fixing effect of the flexible mask 12 against the user's facial skin, improving user experience.

[0118] At least one buckle fixing ear 6 is provided at each of the four corners on both sides of the upper and lower parts of the support frame 11. Each buckle fixing ear 6 is provided with a strap buckle 5 that is clamped to the buckle fixing ear 6.

[0119] Specifically, a fixing clamping projection is provided at the front end of the strap buckle 5, and a fixing hole is provided at the rear end of the buckle fixing ear 6. The fixing clamping projection is inserted into the fixing hole, so that the four corners of the support frame 11 further fix the flexible mask 12 to the user's facial skin through the cooperation of the strap buckles 5 and the buckle fixing ears 6, achieving a tighter fit and improving waterproof sealing.

[0120] Example 3

[0121] As shown in FIGS. 28 to 36, this example provides an anti-choking snorkeling mask, which may comprise a mask body 1 and a breathing tube 2 in communication with the breathing cavity 122 of the mask body 1. A buoyancy control valve 23 is provided at the top end of the breathing tube 2. The mask further includes an anti-choking structure disposed at the communication node between the breathing tube 2 and the breathing cavity 122. The anti-choking structure comprises a shunt housing 7 in which a confluence flow channel 71, a drainage flow channel 72, and a bidirectional flow channel 73 are formed.

[0122] As shown in FIGS. 28 to 30, the confluence flow channel 71 has a water / gas inlet in communication with the breathing tube 2 for receiving fluid from the breathing tube 2. The drainage flow channel 72 extends downwardly from the bottom of the confluence flow channel 71, and a one-way drainage valve 1135 is connected to the terminal end of the drainage flow channel for discharging liquid. The bidirectional flow channel 73 extends out from one side of the confluence flow channel 71, with its terminal end in communication with the breathing cavity 122 for introducing gas into the breathing chamber 122, and also for discharging gas and / or vapor (gas-liquid mixture) out of the breathing cavity 122.

[0123] Specifically, as shown in FIGS. 35 and 36, when the buoyancy control valve 23 is exposed above the water surface, the gravity float ball inside the buoyancy control valve 23 falls from the top end of the buoyancy control valve 23, exposing the air intake inlet at the top end of the buoyancy control valve 23. The buoyancy control valve 23 is in an open state. At this time, liquid may also enter the breathing tube 2 together. All fluid (air and possibly contained water) in the breathing tube 2 enters the breathing tube 2 through the air intake inlet of the buoyancy control valve 23, and then enters the confluence flow channel 71 from the breathing tube 2.

[0124] As shown in FIG. 35, the liquid flow direction is indicated by the dashed arrows in FIG. 35. Within the confluence flow channel 71, liquid sinks due to gravity and exits the snorkeling mask via the drainage flow channel 72 at the bottom and the one-way drainage valve 1135. In addition to liquid entering via the buoyancy control valve 23, during snorkeling, due to temperature differences between the inside and outside of the breathing tube 2, condensate water vapor generated by user respiration or other external factors may cause water drops to form on the inner wall of the breathing tube 2. These water drops can also flow out through the bidirectional flow channel 73 into the confluence flow channel 71, and finally exit the snorkeling mask through the drainage flow channel 72 at the bottom and the one-way drainage valve 1135, further improving the safety of the snorkeling mask and effectively preventing choking incidents.

[0125] As shown in FIG. 36, the gas and / or vapor flow direction is indicated by the dashed arrows in FIG. 36. Gas and / or vapor are drawn into the breathing cavity of the mask body 1 via the bidirectional flow channel 73 located at the side. The breathing cavity contains gas exhaled by the user, which contains a certain amount of moisture. It may also contain vapor from sweat evaporated from the user's skin. The exhaled gas containing moisture and the evaporated sweat are both considered vapor. The gas and / or vapor in the breathing cavity enter the confluence flow channel 71 and the tubular body 22 respectively through the bidirectional flow channel 73, and are discharged through the buoyancy control valve 23, thus completing the gas exchange between the interior of the mask body 1 and the external environment. The two flow channels are spatially isolated, which can separate and discharge the trace liquid water that may be mixed into the breathing air flow, ensuring that the gas entering the mouth and nose of the user is dry and clean, thereby preventing choking incidents.

[0126] When the buoyancy control valve 23 enters underwater, the gravity float ball inside the buoyancy control valve 23 floats up from the lower end of the buoyancy control valve 23, blocking the air intake inlet at the top end of the buoyancy control valve 23. The buoyancy control valve 23 is in a closed state, sealing the gas within the cavities of the mask body 1 and the breathing tube 2. The buoyancy control valve 23 isolates the exchange of external air and the entry of liquid.

[0127] By providing the shunt housing 7 and its internal flow channels, the snorkeling mask achieves a gas-liquid separation function. When the user breathes or when water enters the mask, gas and liquid in the breathing tube enter the confluence flow channel 71. Liquid sinks to the bottom drainage flow channel 72 due to gravity and is discharged through the one-way drainage valve 1135, while gas enters the breathing cavity for inhalation via the bidirectional flow channel, or during exhalation, gas flows reversely through the bidirectional flow channel 73 and confluence flow channel 71 towards the breathing tube 2. The buoyancy control valve 23 can automatically close when the tube opening is submerged, preventing large amounts of water from entering. The overall structure effectively prevents water from entering the breathing cavity, avoiding choking, while ensuring normal breathing.

[0128] As shown in FIGS. 31 to 32, the bottom of the drainage flow channel 72 is configured as an inverted funnel shape. Its opening gradually narrows to smoothly connect with the outlet of the confluence flow channel 71, and its outlet is configured to extend inclinedly towards the mask body 1. That is to say, after the mixed fluid enters the confluence flow channel 71, gravity and inertia cause liquid water to sink and collect, while gas remains in the upper part. Through the inverted funnel-shaped structure at the bottom, and since the outlet of the funnel-shaped structure extends inclinedly towards the mask body 1, the sinking liquid is accelerated and guided and ultimately discharged by the one-way valve. Thereafter, the gas located in the upper part of the confluence flow channel 71 is separately inhaled into the breathing cavity 122 of the user via the bidirectional flow channel 73 at the side.

[0129] As shown in FIGS. 30 to 32, the drainage flow channel 72 extends downward to its bottom where it connects to the one-way drainage valve 1135; the bidirectional flow channel 73 is a horizontal passage leading to the breathing cavity 122. The drainage flow channel 72 is defined to extend vertically (or nearly vertically) downward from the bottom of the confluence flow channel 71, making gravity the main driving force for liquid flow, providing the most direct path and highest drainage efficiency. The bidirectional flow channel 73 is defined as a horizontal passage, providing the shortest and most direct linear path for gas from the side of the confluence flow channel 71 to the breathing cavity 122, minimizing airflow turns and friction, thereby minimizing inhalation resistance.

[0130] The angle β between the axis of the bidirectional flow channel 73 and the horizontal plane satisfies: 0°≤β≤45°. That is to say, when the axis of the bidirectional flow channel 73 is inclined downward at an angle β (0<β≤45°) relative to the horizontal plane, gas flows downward under negative pressure. Any tiny liquid droplets attempting to enter this inclined flow channel along with the airflow will be subjected to gravity and fall back to the bottom of the confluence flow channel 71.

[0131] Furthermore, the angle β satisfying 0°≤β≤45° also makes it easier for the user, relying on their swimming posture during snorkeling, to fling tiny liquid droplets inside the breathing tube 2 into the confluence flow channel 71, which then flow out via the drainage pipe.

[0132] Additionally, when the bidirectional flow channel 72 has an upward inclination angle (β>0°), it actually creates a smoother path for gas entry and exit, avoiding a sharp 90° turn for the gas at the flow channel entrance. This smooth transition design reduces vortices and energy loss during airflow. For inhalation, gas enters the breathing cavity more smoothly from the confluence flow channel 73, making the user feel less resistant to inhale. For exhalation, gas exiting the breathing cavity can also enter the confluence flow channel 73 and guide towards the breathing tube 2 more smoothly, reducing breathing resistance, alleviating the burden on the diaphragm, and making breathing more natural and relaxed.

[0133] Moreover, limiting the β angle between 0° and 45° allows the shunt housing 7 and its internal flow channels to better conform to the natural contour of the human face, especially the transition area from the cheekbone to the jaw. This avoids forcing the shunt housing to protrude outward due to an overly steep flow channel angle, or compressing the face due to an overly flat angle. It also avoids creating local stress concentration points when the mask is worn, which not only improves sealing to prevent leakage but also enhances comfort during prolonged wear.

[0134] The angle γ between the axis of the drainage flow channel 72 and the axis of the tubular body 22 of the breathing tube 2 satisfies: 0°≤γ≤45°. Liquid entering the tubular body 21 from the buoyancy control valve 23 flows down towards or along the drainage flow channel 72 under the action of gravity. Since there is a certain angle between the axis of the drainage flow channel 72 and the breathing tube 2, this angle makes the direction of the drainage flow channel 72 basically consistent with or slightly inclined relative to the direction of the breathing tube body 21. This facilitates the layout of the drainage flow channel 72 along the mask structure and utilizes gravity to ensure smooth water discharge, avoiding tortuous or blocked drainage paths caused by an excessively large angle, thus optimizing the overall spatial layout. The existence of this angle ensures that the drainage flow channel 72 is not parallel to the user's swimming direction and water flow will smoothly pass along the guiding direction of the breathing tube 2 rather than impacting the valve directly. This reduces water resistance during swimming and protects the one-way drainage valve 1135 from direct impact by water pressure, ensuring the valve opens reliably only when internal water accumulates and cannot be forced open by external water pressure.

[0135] As shown in FIGS. 30 to 32, the shunt housing 7 is an integrally molded component disposed between the breathing tube 2 and the breathing cavity 122. This improves product design flexibility and production consistency, simplifying the structural design of the mask body or breathing tube 2.

[0136] The one-way drainage valve 1135 is disposed at the bottom of the drainage flow channel 72 via a clamping connection or a threaded connection. The one-way drainage valve 1135 is a duckbill valve or an umbrella valve.

[0137] That is to say, the one-way drainage valve 1135 can be fixedly installed via a clamping connection, which facilitates rapid assembly and disassembly, or via a threaded connection, which provides stronger connection strength and sealing reliability, at the outlet at the very bottom of the drainage flow channel 72. Duckbill valves and umbrella valves are two mature valve types that utilize flexible material deformation to achieve one-way on / off functionality. They open to drain only when internal pressure (or liquid gravity) exceeds external pressure, and external water pressure keeps them tightly closed to effectively prevent backflow. This example employs an umbrella valve, which has lower cost and is easier for mass production.

[0138] As shown in FIGS. 28 to 30, the mask body 1 comprises a flexible mask 12 and a support frame 11. The breathing cavity 122 is formed on the flexible mask 12, and the shunt housing 7 and the one-way drainage valve 1135 are disposed on the support frame 11. Thus, the anti-choking structure of the utility model can utilize the rigidity of the support frame 11 to carry core functional components, ensuring structural stability and flow channel precision; it utilizes the flexible mask 12 to ensure facial fit and comfort, achieving an optimized combination of safety function and wearing experience, which is conducive to industrial promotion.

[0139] As shown in FIGS. 28 to 30, the flexible mask 12 comprises an observation cavity 121 and a breathing cavity 122 arranged separately. A gap region for exposing the zygoma of the wearer is formed between the observation cavity 121 and the breathing cavity 122. The anti-choking structure in this example of the present utility model serves the breathing cavity 122 part, while the observation cavity 121 exists independently. During wearing, the zygomatic skin of the user is exposed from the gap region.

[0140] As shown in FIGS. 28 to 30, the breathing tube 2 is of a neck-wrapping and rear-mounted type, comprising a breathing tube joint 21 connected to the mask body 1 and a tubular body 22 connected to the buoyancy control valve 23. The bending angle α between the breathing tube joint 21 and the tubular body 22 satisfies: 100°≤α≤120°. When combined with the aforesaid anti-choking structure, this not only solves the choking problem but also further optimizes the overall product ergonomics. The neck-wrapping and rear-mounted design reduces pipeline interference in front of the face, lowers the risk of accidental bumping of the breathing tube 2, makes the breathing path more natural, and enhances movement freedom and wearing stability.

[0141] Example 4

[0142] The shunt housing 7 is jointly enclosed and formed by the connection of the breathing tube joint 21 of the breathing tube 2 and the breathing tube plug 1134 on the oronasal frame 113 of the mask body 1. This can effectively reduce costs. In this example, the anti-choking function is seamlessly integrated into the existing product structure, adding almost no volume or weight. The structure is compact and the connection is reliable.

[0143] The above examples are merely used to illustrate the technical solutions of the present invention and are not intended to limit them. Under the concept of the present invention, technical features in the above examples or different examples can also be combined, steps can be implemented in any order, and many other variations in different aspects of the present invention as described above exist. For brevity, they are not provided in detail. Although the present invention has been described in detail with reference to the foregoing examples, those of ordinary skill in the art should understand that they can still amend the technical solutions recited in the foregoing examples or perform equivalent replacements for some of the technical features therein. Such amendments or replacements do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions in the examples of the present invention.

Claims

1. A snorkeling mask, comprising a mask body and a breathing tube, wherein the interior of the breathing tube is in fluid communication with the interior of the mask body, characterized in that: the mask body includes a breathing section and an observation section which are arranged separately, with a gap formed between the breathing section and the observation section for exposing human zygomatic skin; and the breathing tube is in communication with the breathing section and is arranged in a bent, neck-wrapping and rear-mounted manner, so that the breathing section is in direct fluid communication with the outside.

2. The snorkeling mask according to claim 1, characterized in that the mask body comprises a support frame and a flexible mask;the flexible mask includes an observation cavity and a breathing cavity which are connected to each other, wherein the observation cavity wraps the periphery of the eyes, the breathing cavity wraps the periphery of the mouth and nose, and the zygomatic part of the human is exposed;the support frame includes an eye frame, a nose bridge support part and an oronasal frame, wherein the eye frame and the oronasal frame are connected through the nose bridge support part, and a gap is reserved between the eye frame and the oronasal frame.

3. The snorkeling mask according to claim 2, characterized in that the front end of the flexible mask is fixed to the back of the support frame, and the back of the flexible mask fits against the facial skin of the human.

4. The snorkeling mask according to claim 3, characterized in that the front end of the flexible mask is fixed to the back of the support frame by: clamping the eye frame to the observation cavity, and clamping the nose bridge support part and the oronasal frame respectively to the breathing cavity.

5. The snorkeling mask according to claim 4, characterized in that the eye frame is clamped to the observation cavity by: the front end of the observation cavity including an eye connection opening, the mask body further comprising an eye expanding frame sleeved at the eye connection opening, wherein the eye frame is clamped to the eye expanding frame.

6. The snorkeling mask according to claim 4, characterized in that the nose bridge support part and the oronasal frame are respectively clamped to the breathing cavity by: the front end of the breathing cavity including a mouth connection opening, a second clamping flange extending inwards from the front edge of the mouth connection opening, a third clamping flange being arranged on the outer peripheral edge of the oronasal frame, and the second clamping flange being clamped to the third clamping flange.

7. The snorkeling mask according to claim 6, characterized in that the mask body further includes a mouth expanding frame clamped in the mouth connection opening;a second clamping annular groove is arranged on the outer peripheral edge of the mouth expanding frame, and the second clamping flange is clamped at the second clamping annular groove, so that the mouth expanding frame is clamped at the mouth connection opening; and / or,the oronasal frame protrudes forward to form a mouth support baffle, and a breathing cavity connection wall extends backward from the periphery of the mouth support baffle; a third clamping annular groove is arranged on the front outer periphery of the mouth connection opening, and the breathing cavity connection wall is sleeved at the third clamping annular groove.

8. The snorkeling mask according to claim 3, characterized in that the back of the flexible mask fits against the facial skin of human by: arranging an eye fitting opening at the rear end of the observation cavity and fitting the eye fitting opening against the skin around the eyes of human;arranging a mouth-nose fitting opening at the rear end of the breathing cavity and fitting the mouth-nose fitting opening against the skin around the mouth and nose of human.

9. The snorkeling mask according to claim 8, characterized in that: the eye fitting opening includes an eye support skirt and an eye isolation wall, wherein the eye support skirt is arranged on the outer peripheral edge of the eye fitting opening, and the eye isolation wall extends inwards from the inner peripheral side of the eye support skirt;and / or,the mouth-nose fitting opening includes a mouth support skirt and a mouth isolation wall, wherein the mouth support skirt is arranged on the outer peripheral edge of the mouth-nose fitting opening, and the mouth isolation wall extends inwards from the inner peripheral side of the mouth support skirt.

10. The snorkeling mask according to claim 2, characterized in that the breathing tube is in communication with the breathing cavity, and one end of the breathing tube is clamped to the support frame.

11. The snorkeling mask according to claim 10, characterized in that: the breathing tube includes a breathing tube joint, and the oronasal frame is provided with a breathing tube plug that is clamped to the breathing tube joint.

12. The snorkeling mask according to claim 10, characterized in that: the breathing tube further includes a tubular body and a buoyancy control valve, wherein the buoyancy control valve is arranged at the other end of the breathing tube; one end of the tubular body is connected to the buoyancy control valve, and the other end of the tubular body is connected to the breathing tube joint;the connection point between the breathing tube joint and the tubular body is bent, and a bending angle formed by an extension line of the breathing tube joint and an extension line of the tubular body is α, wherein 100°≤α≤120°.

13. An anti-choking snorkeling mask, characterized by comprising:a mask body, provided with a breathing cavity;a breathing tube, in communication with the breathing cavity, the top end of the breathing tube being provided with a buoyancy control valve;a shunt housing, arranged at the communication position of the breathing tube and the breathing cavity;a confluence flow channel, a drainage flow channel and a bidirectional flow channel formed in the shunt housing; wherein one end of the confluence flow channel is in communication with the breathing tube, the other end of the confluence flow channel is respectively in communication with the drainage flow channel and the bidirectional flow channel, and the confluence flow channel is used for receiving fluid from the breathing tube and / or the bidirectional flow channel;wherein the drainage flow channel extends downward from the bottom of the confluence flow channel, and a one-way drainage valve is arranged at the terminal end of the drainage flow channel, the one-way drainage valve being used for discharging liquid out of the shunt housing;wherein the bidirectional flow channel extends out from one side of the confluence flow channel, and the terminal end of the bidirectional flow channel is in communication with the breathing cavity, the bidirectional flow channel being used for introducing gas into the breathing cavity and also for discharging gas and / or vapor out of the breathing cavity.

14. The snorkeling mask according to claim 13, characterized in that the bottom of the drainage flow channel is in the shape of an inverted funnel, the opening of which is connected to the outlet of the confluence flow channel, and the outlet of which extends inclinedly towards the mask body.

15. The snorkeling mask according to claim 13, characterized in that the opening of the drainage flow channel gradually narrows towards the confluence flow channel, so that the opening of the drainage flow channel is smoothly connected to the outlet of the confluence flow channel.

16. The snorkeling mask according to claim 13, characterized in that an angle β between the axis of the bidirectional flow channel and the horizontal plane satisfies 0°≤β≤45°.

17. The snorkeling mask according to claim 13, characterized in that an angle γ between the axis of the drainage flow channel and the axis of the tubular body of the breathing tube satisfies 0°≤γ≤45°.

18. The snorkeling mask according to claim 13, characterized in that the one-way drainage valve is arranged at the bottom of the drainage flow channel by clamping or threaded connection.

19. The snorkeling mask according to claim 18, characterized in that the one-way drainage valve is a duckbill valve or an umbrella valve.

20. The snorkeling mask according to claim 18, characterized in that the mask body includes a flexible mask and a support frame, wherein the breathing cavity is formed on the flexible mask and the shunt housing is connected to the support frame.

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