Pressure relief mouthpiece and water sports equipment having the same

Abstract

A pressure-reducing mouthpiece for a water activity device includes a connecting portion for a user's mouth to hold. The connecting portion has a circumferential arc-shaped wall, with a first hollow structure and a second hollow structure on its left and right sides, respectively. Each hollow structure includes an upper wall, a lower wall opposite to the upper wall, an inner wall connecting the upper and lower walls, and a limiting wall extending upward and downward from the inner wall. When the user's mouth holds the connecting portion, some of the user's teeth can appropriately contact the upper and lower walls of each hollow structure.

Description

Technical Field

[0001] This invention relates to a decompression mouthpiece for water activity equipment used in water activities (including above-water and underwater) such as swimming training, snorkeling, or deep diving. Prior Technology

[0002] Today, water sports equipment is diverse, including swimming goggles, snorkeling masks, and oxygen supply equipment for deep diving. Many of these devices require mouthpieces, such as snorkels for training swims, snorkels for two-piece snorkeling masks, and even second-stage or spare second-stage snorkels for deep diving. For example, Figure 1A shows a one-piece snorkel 101 for training swims, with a mouthpiece M1 at its lower end, while Figure 1B shows a snorkel 102 for two-piece snorkeling masks, also with a mouthpiece M2 at its lower end.

[0003] To improve the chewing comfort of mouthpieces, manufacturers currently focus on modifying the chewing contact surfaces. For example, they may add anti-slip structures to the surfaces that contact the teeth, or use softer and more comfortable materials for the chewing components, such as gel-filled pouches, to reduce the user's chewing burden. As shown in Figure 1C, mouthpiece M3 has multiple concave and convex points C1 on the tooth contact surface F1. However, these measures are all improvements based on the user's effort in biting down on the mouthpiece.

[0004] However, in practical use, the most comfortable situation for a user's mouth when holding the mouthpiece is a slightly open and relaxed state of the upper and lower jaws (i.e., the upper and lower teeth). This allows for sustained activity for a longer period (close to the state when the user is not holding the mouthpiece). Otherwise, the muscles around the mouth will quickly become sore, affecting the enjoyment of snorkeling. Therefore, existing improvements still cannot meet the actual needs, because users do not bite down hard on the mouthpiece for most of the time during activity, and improvements on the occlusal surface have very limited effect. As shown in Figure 1D, some manufacturers have designed a bridging component B1 in the mouthpiece M4 to overcome the above problems. This allows the bridging component B1 to still support the user's forehead when the bite is relaxed, preventing the mouthpiece from dislodging. However, this measure will cause discomfort to the user's palate skin, resulting in a noticeable foreign body sensation.

[0005] In view of this, improving the structure of the mouthpiece itself to partially or completely solve the above problems has become the research and development goal of the industry. Summary of the Invention

[0006] The main objective of this invention is to provide a pressure-reducing mouthpiece for aquatic activities. By forming a hollow structure on each of the left and right sidewalls of the mouthpiece, and forming an upper wall and a lower wall spaced apart from the upper wall in the hollow structure, a buffer space is naturally formed between the upper wall and the lower wall. This allows the user's upper and lower teeth to be elastically pushed by the upper and lower walls respectively, allowing the user's upper and lower teeth to move closer or further apart, and well supporting the user's mouth in a slightly open natural state, so as to achieve the effect of the user being able to stably and continuously hold the mouthpiece.

[0007] To achieve the above objectives, the present invention discloses a pressure-reducing mouthpiece for a water sports device. The pressure-reducing mouthpiece includes a first connecting portion for connecting to the water sports device, and a second connecting portion for being held in the mouth of a user and communicating with the first connecting portion. The second connecting portion has a circumferential arc-shaped wall. The circumferential arc-shaped wall has a first hollow structure and a second hollow structure, respectively formed on the left and right sides of the circumferential arc-shaped wall. The first hollow structure includes a first upper wall, a first lower wall opposite to the first upper wall, a first inner wall connecting the first upper wall and the first lower wall, and a first limiting wall extending upward and downward from the first inner wall. The second hollow structure includes a second upper wall, a second lower wall opposite to the second upper wall, a second inner wall connecting the second upper wall and the second lower wall, and a second limiting wall extending upward and downward from the second inner wall. When the user's mouth holds the second connecting part, the user's upper and left rows of teeth and lower and left rows of teeth can respectively contact the first upper wall and the first lower wall of the first hollow structure, and the user's upper and right rows of teeth and lower and right rows of teeth can respectively contact the second upper wall and the second lower wall of the second hollow structure.

[0008] In one example, the first hollow structure has a first opening defined by the first upper wall, the first lower wall and the first inner sidewall, and the second hollow structure has a second opening defined by the second upper wall, the second lower wall and the second inner sidewall.

[0009] In any of the foregoing examples, the first opening and the second opening each have a width between 2.2 mm and 15 mm, and the first upper wall, the second upper wall, the first lower wall and the second lower wall each have a thickness between 0.8 mm and 5 mm.

[0010] In any of the foregoing examples, the first hollow structure and the second hollow structure each have a U-shaped, U-shaped or V-shaped cross-sectional shape.

[0011] In any of the foregoing examples, the first hollow structure has a first reinforcing device and the second hollow structure has a second reinforcing device.

[0012] In one example, the first reinforcing device includes at least one first transverse rib spanning between the first upper wall and the first lower wall of the first hollow structure, and the second reinforcing device includes at least one second transverse rib spanning between the second upper wall and the second lower wall of the second hollow structure.

[0013] In one example, the first reinforcing device includes at least one first longitudinal rib disposed between the first upper wall and the first lower wall of the first hollow structure, and the second reinforcing device includes at least one second longitudinal rib disposed between the second upper wall and the second lower wall of the second hollow structure.

[0014] In one example, the first reinforcing device includes a plurality of first protrusions disposed between the first upper wall and the first lower wall of the first hollow structure, and the second reinforcing device includes a plurality of second protrusions disposed between the second upper wall and the second lower wall of the second hollow structure.

[0015] In any of the aforementioned examples, the first hollow structure and the second hollow structure are detachable from the left and right sides of the circumferential arc-shaped wall.

[0016] In any of the aforementioned examples, a groove structure is further formed on each of the left and right sides of the circumferential arc-shaped wall to increase the lateral swing amplitude of the first hollow structure and the second hollow structure.

[0017] In any of the foregoing examples, the pressure-reducing mouthpiece further includes a 100-fold structure integrally formed between the first connecting portion and the second connecting portion, so as to increase the degree of flexibility of the second connecting portion relative to the first connecting portion.

[0018] Furthermore, for the same purpose described above, this invention discloses an underwater activity device comprising a mask, a snorkel, and a pressure-relieving mouthpiece as described in any of the examples above. The mask is used to cover a user's eyes and nose. The snorkel has an upper end and a lower end. The upper end provides air inlet and outlet. A connector is provided between the upper end and the lower end for connection to the mask. The pressure-relieving mouthpiece is located at the lower end of the snorkel. Simple Explanation of the Diagram

[0019] Figure 1A is a three-dimensional schematic diagram of a user wearing a breathing tube commonly used for training swimming.

[0020] Figure 1B is a three-dimensional schematic diagram of the mouthpiece of a conventional breathing tube.

[0021] Figure 1C is a three-dimensional schematic diagram of another conventional mouthpiece, in which the surface in contact with the teeth is provided with a plurality of concave and convex anti-slip structures.

[0022] Figure 1D is a three-dimensional schematic diagram of another conventional mouthpiece, which has a bridging element for holding the user's palate.

[0023] Figure 2A is a three-dimensional schematic diagram of a pressure-reducing mouthpiece according to an embodiment of the present invention.

[0024] Figure 2B is a top view of Figure 2A, in which the openings of the hollow structures on both sides of the pressure-reducing mouthpiece are U-shaped.

[0025] Figure 2C is a top view of another embodiment of the pressure-reducing mouthpiece, wherein the openings of the hollow structures on both sides of the pressure-reducing mouthpiece are V-shaped.

[0026] Figure 2D is a top view of another embodiment of the pressure-reducing mouthpiece, wherein the openings of the hollow structures on both sides of the pressure-reducing mouthpiece are U-shaped.

[0027] Figure 3A is a three-dimensional schematic diagram of a pressure-reducing mouthpiece according to an embodiment of the present invention, wherein the reinforcing device disposed between the upper and lower walls of the hollow structure is a transverse rib.

[0028] Figure 3B is a three-dimensional schematic diagram of a pressure-reducing mouthpiece according to another embodiment, wherein the reinforcing device provided between the upper and lower walls of the hollow structure is a longitudinal rib.

[0029] Figure 3C is a perspective view of another embodiment of the pressure-reducing mouthpiece, wherein the reinforcing device provided between the upper and lower walls of the hollow structure consists of a plurality of protrusions.

[0030] Figure 3D is a perspective view of a pressure-reducing mouthpiece in another embodiment, showing that the hollow structure is an independent and detachable part.

[0031] Figure 3E is a perspective view of a pressure-reducing mouthpiece in another embodiment, showing that grooves are formed on the left and right sides of the circumferential arc-shaped wall.

[0032] Figure 3F is a perspective view of a pressure-reducing mouthpiece in another embodiment, showing a 100-fold structure formed between the first connecting portion and the second connecting portion.

[0033] Figure 3G is a three-dimensional schematic diagram of a pressure-reducing mouthpiece in another embodiment, which has a groove structure and a zigzag construction.

[0034] Figures 4A-4C depict illustrative variations of the folded structure of the present invention.

[0035] Figure 5 shows a three-dimensional schematic diagram of a user wearing the water activity equipment of the present invention. Implementation

[0036] The following description of the embodiments is for illustrative purposes only and is not intended to limit the invention. Components not directly related to the invention are not shown, and the dimensional relationships between components in the drawings are for ease of understanding only and are not intended to limit the actual scale. Furthermore, terms such as up, down, front, back, left, right, inside, and outside in the descriptions are defined based on the user's orientation and are only relative relationships, not limitations. When a component name involves both a first and a second, and only the detailed structure of one is described, it means that both have the same structure, especially a symmetrical structure, and therefore will not be repeated below.

[0037] As shown in Figure 2A, the present invention provides a decompression mouthpiece 2, which can be used in aquatic activity equipment, such as a snorkeling mouthpiece snorkel or any aquatic activity equipment equipped with a mouthpiece.

[0038] The pressure-reducing mouthpiece 2 includes a first connecting portion 21 and a second connecting portion 23 opposite to the first connecting portion 21. The first connecting portion 21 is used to connect to underwater equipment (e.g., the lower end of a snorkel). The second connecting portion 23 is used to be held in the mouth of a user and communicates with the first connecting portion 21.

[0039] The second connecting portion 23 has a circumferential arc-shaped wall 231. The circumferential arc-shaped wall 231 has a first hollow structure H1 and a second hollow structure H2, which are formed on the left and right sides of the circumferential arc-shaped wall 231, respectively. The first hollow structure H1 includes a first upper wall H11, a first lower wall H13 opposite to the first upper wall H11, a first inner wall H15 connecting the first upper wall H11 and the first lower wall H13, and a first limiting wall H17 provided on the first inner wall H15 and extending upward and downward from the first inner wall H15. Similarly, the second hollow structure H2 includes a second upper wall H21, a second lower wall H23 opposite to the second upper wall H21, a second inner wall H25 connecting the second upper wall H21 and the second lower wall H23, and a second limiting wall H27 provided on the second inner wall H25 and extending upward and downward from the second inner wall H25.

[0040] When the user's mouth holds the second connecting part 23, the user's upper and left teeth, as well as lower and left teeth, can respectively contact the first upper wall H11 and the first lower wall H13 of the first hollow structure H1, while the user's upper and right teeth, as well as lower and right teeth, can respectively contact the second upper wall H21 and the second lower wall H23 of the second hollow structure H2. At this time, the circumferential arc-shaped wall 231 can be accommodated between the user's upper gum and upper lip, and between the lower gum and lower lip. In addition, the user's left upper and lower teeth are confined between the left side of the circumferential arc-shaped wall 231 and the first limiting wall H17 of the first hollow structure H1, while the right upper and lower teeth are confined between the right side of the circumferential arc-shaped wall 231 and the second limiting wall H27 of the second hollow structure H2, thus achieving the effect of positioning the pressure-reducing mouthpiece 2 entirely in the user's mouth. At this time, a space is formed between the first upper wall H11 and the first lower wall H13, and between the second upper wall H21 and the second lower wall H23, respectively, providing relative elastic buffering capacity for the upper and lower teeth.

[0041] Preferably, the first hollow structure H1 and the second hollow structure H2 can be made of thermosetting silicone or thermoplastic plastic materials, and have a Shore A hardness between 30 and 90.

[0042] Furthermore, as shown in Figure 2B, from the top view of the pressure-reducing mouthpiece 2, the first hollow structure H1 has a first opening H1p, and the second hollow structure H2 has a second opening H2p. The first opening H1p is defined by the first upper wall H11, the first lower wall H13, and the first inner side wall H15. The second opening H2p is defined by the second upper wall H21, the second lower wall H23, and the second inner side wall H25.

[0043] The first opening H1p and the second opening H2p preferably each have a width W of 2.2 mm to 15 mm. The first upper wall H11, the second upper wall H21, the first lower wall H13, and the second lower wall H23 preferably each have a thickness T of 0.8 mm to 5 mm. In this way, the user's upper and lower teeth can achieve a support height H of 3 mm to 20 mm. Alternatively, the openings can have a width W of 6 mm to 10 mm, and each upper and lower wall can have a thickness T of 1.5 mm to 3 mm; in this case, the user's upper and lower teeth can achieve a support height H of 7.5 mm to 13 mm.

[0044] Each of the first hollow structure H1 and the second hollow structure H2 may have a U-shaped, U-shaped, or V-shaped cross-sectional shape. Figure 2B illustrates that each of the first hollow structure H1 and the second hollow structure H2 has a U-shaped cross-sectional shape. In another embodiment, as shown in Figure 2C, the pressure-reducing mouthpiece 2c has a V-shaped cross-sectional shape for each of its first hollow structure H1 and the second hollow structure H2. In yet another embodiment, as shown in Figure 2D, the pressure-reducing mouthpiece 2d has a U-shaped cross-sectional shape for each of its first hollow structure H1 and the second hollow structure H2.

[0045] Based on the aforementioned hollow structure (i.e., the first hollow structure H1 and the second hollow structure H2), a sufficient gap is formed between its upper and lower walls, which is sufficient to hold the upper and lower teeth respectively, supporting the user's slightly open mouth in a natural state. This achieves a stable hold on the mouthpiece without causing fatigue in the muscles around the user's mouth. Furthermore, when the user intermittently tries to bite down forcefully to bring the upper and lower teeth closer together, the existence of this gap prevents obstruction. In other words, this structure allows the upper and lower walls to elastically approach and move away from each other, maintaining their original distance. This allows the upper and lower teeth to be held in place, keeping the user in a relaxed, slightly open mouth position.

[0046] Furthermore, to maintain a constant distance between the upper and lower walls and prevent collapse, a reinforcing device can be added to each hollow structure to increase its strength, reducing the need to thicken the upper and lower walls. Specifically, as shown in Figure 3A, the first hollow structure H1 of the pressure-reducing mouthpiece 3a may have a first reinforcing device R1, which includes at least one first transverse rib 31. Each first transverse rib 31 spans between the first upper wall H11 and the first lower wall H13 of the first hollow structure H1, for example, its two ends connecting the first upper wall H11 and the first lower wall H13. Similarly, the second hollow structure H2 of the pressure-reducing mouthpiece 3a may have a second reinforcing device R2, which includes at least one second transverse rib 32. Each second transverse rib 32 spans between the second upper wall H21 and the second lower wall H23 of the second hollow structure H2.

[0047] In another embodiment, as shown in FIG3B, the first reinforcing device R1 of the first hollow structure H1 of the pressure-reducing mouthpiece 3b may also include at least one first longitudinal rib 33. Each first longitudinal rib 33 is disposed between the first upper wall H11 and the first lower wall H13 of the first hollow structure H1. Preferably, two first longitudinal ribs 33 are provided, respectively disposed on the first upper wall H11 and the first lower wall H13. Similarly, the second reinforcing device R2 of the second hollow structure H2 of the pressure-reducing mouthpiece 3b may also include at least one second longitudinal rib 34. Each second longitudinal rib 34 is disposed between the second upper wall H21 and the second lower wall H23 of the second hollow structure H2.

[0048] In yet another embodiment, as shown in FIG3C, the first reinforcing device R1 of the first hollow structure H1 of the pressure-reducing mouthpiece 3c may also include a plurality of first protrusions 35 disposed between the first upper wall H11 and the first lower wall H13 of the first hollow structure H1. Similarly, the second reinforcing device R2 of the second hollow structure H2 of the pressure-reducing mouthpiece 3c includes a plurality of second protrusions 36 disposed between the second upper wall H21 and the second lower wall H23 of the second hollow structure H2.

[0049] In the above examples and embodiments, the first hollow structure H1 and the second hollow structure H2 are integrally formed on the left and right sides of the circumferential arc-shaped wall 231, respectively. However, in another embodiment, the first hollow structure H1 and the second hollow structure H2 can also be made into independent parts and coupled to the left and right sides of the circumferential arc-shaped wall 231 in a fixed or detachable manner, as shown in the pressure-reducing bite 3d in Figure 3D.

[0050] Furthermore, in one embodiment, as shown in FIG3E, the pressure-reducing mouthpiece 3e may have groove structures G1 formed on the left and right sides of the circumferential arc-shaped wall 231 (only one side is shown in the figure). Preferably, it consists of a plurality of parallel elongated grooves, forming a continuous concave-convex cross-section to increase the possibility of the first hollow structure H1 and the second hollow structure H2 approaching or moving away from each other, that is, to increase the lateral (i.e., left-right) swing amplitude of the circumferential arc-shaped wall 231. Thus, because the circumferential arc-shaped wall 231 has more freedom of relative outward and inward expansion, when the user holds the mouthpiece, it can be adapted to a more correct and comfortable position according to the different spacing of the left and right rows of teeth, so as to be suitable for more users with different shapes or sizes of mouths.

[0051] The groove structure G1 on the left and right sides of the circumferential arc-shaped wall 231 may have at least one of the following: a continuous sawtooth cross section S1 (as shown in Figure 4A), a continuous rectangular cross section S2 (as shown in Figure 4B), or a continuous concave-convex cross section S3 (as shown in Figure 4C).

[0052] Furthermore, in one embodiment, as shown in FIG3F, the pressure-reducing mouthpiece 3f may have a 100-fold structure MF1, integrally formed between the first connecting portion 21 and the second connecting portion 23, thereby increasing the degree of flexibility of the second connecting portion 23 relative to the first connecting portion 21, which can further reduce the tension burden on the user's mouth caused by incorrect mouthpiece positioning, making it more convenient for the user to use. The 100-fold structure MF1 may be made of thermosetting silicone or thermoplastic plastic material, and has a Shore A hardness between 20 and 70.

[0053] Similarly, the zigzag structure MF1 may also have at least one of the following: a continuous sawtooth cross section S1 (as shown in Figure 4A), a continuous rectangular cross section S2 (as shown in Figure 4B), or a continuous concave-convex cross section S3 (as shown in Figure 4C).

[0054] In another embodiment, as shown in FIG3G, the pressure-reducing mouthpiece 3g can be combined with the groove structure G1 shown in FIG3E and the zigzag structure MF1 shown in FIG3F to provide the maximum degree of freedom of mouthpiece variation, whether in the width of the bite or in the direction of mouthpiece extension.

[0055] In addition to snorkels for swimming training and (spare) second-stage respirators for deep-sea diving, the decompression mouthpiece of the present invention can be used in two-piece snorkeling equipment (i.e., a snorkel paired with a diving mask that is not connected to the snorkel), or even other types of diving masks, such as the single-piece snorkeling equipment (i.e., a breathable mask in which the snorkel and the mask body are connected) developed by the inventor of this case, which has a mouthpiece.

[0056] Taking a two-piece snorkeling suit as an example, as shown in Figure 5, the underwater activity equipment 5 includes a mask 51, a snorkel 53, and a pressure-reducing mouthpiece 55 as described in any of the above examples or embodiments (i.e., pressure-reducing mouthpieces 2, 2c, 2d, 3a, 3b, 3c, 3d, 3e, 3f, 3g). The mask 51 is used to cover the user's eyes and nose. The snorkel 53 has an upper end 53a and a lower end 53b opposite to the upper end 53a. The upper end 53a provides air inlet and outlet. A connector 53c is provided between the upper end 53a and the lower end 53b for connection to the mask 51. The pressure-reducing mouthpiece 55 is located at the lower end 53b of the snorkel 53.

[0057] The key feature of this invention is the hollow structure on both sides of the aforementioned mouthpiece. The design of other parts, or the type of watercraft equipment it is used in, is irrelevant. Any aspect based on the core technology of this invention is subject to protection. Therefore, the above embodiments are merely illustrative of the implementation of this invention and to explain its technical features, and are not intended to limit the scope of protection of this invention. Any changes or equivalent arrangements that can be easily made by those skilled in the art are within the scope of this invention, and the scope of protection of this invention should be determined by the claims of the patent applications.

[0058] 2, 2c, 2d, 3a, 3b, 3c, 3d, 3e, 3f, 3g, 55: Pressure-reducing mouthpiece 5: Equipment for water activities 21: First connecting part 23: Second connecting part 31: First transverse rib 32: Second transverse rib 33: First longitudinal rib 34: Second longitudinal rib 35: First protrusion 36: Second protrusion 51: Face mask 53: Breathing tube 53a: Upper end 53b: Lower end 53c: Connector 231: Circumferential Arc-Shaped Wall H1: First hollow structure H2: Second hollow structure H11: First Upper Wall H13: First lower wall H15: First inner wall H17: First confinement wall H21: Second upper wall H23: Second lower wall H25: Second inner wall H27: Second confinement wall H1p: First opening H2p: Second opening R1: First Reinforcement Device R2: Second Enhancement Device W: Width T: Thickness H: Support height G1: Trench Structure MF1: ​​Hundred-fold construction S1: Continuous sawtooth cross-section S2: Continuous rectangular cross-section S3: Continuous concave-convex cross-section 101, 102: Breathing tube M1, M2, M3, M4: Biting mouthpiece F1: Surface C1: Concave / convex points B1: Bridging component

Claims

1. A pressure-reducing mouthpiece for a water activity device, comprising: a first connecting portion for connecting the water activity device; and a second connecting portion for being held in the mouth of a user and communicating with the first connecting portion; characterized in that: the second connecting portion has a circumferential arcuate wall, the circumferential arcuate wall having a first hollow structure and a second hollow structure respectively formed on the left and right sides of the circumferential arcuate wall; the first hollow structure comprising: a first upper wall; a first lower wall opposite to the first upper wall; a first inner wall connecting the first upper wall and the first lower wall; and a first limiting wall. The second hollow structure extends upward and downward from the first inner sidewall; the second hollow structure includes: a second upper wall; a second lower wall opposite to the second upper wall; a second inner sidewall connecting the second upper wall and the second lower wall; and a second limiting wall extending upward and downward from the second inner sidewall; when the user's mouth holds the second connecting portion, the user's upper and left rows of teeth and lower and left rows of teeth can respectively contact the first upper wall and the first lower wall of the first hollow structure, and the user's upper and right rows of teeth and lower and right rows of teeth can respectively contact the second upper wall and the second lower wall of the second hollow structure; wherein, Viewed from above, the first hollow structure has a first opening defined by the first upper wall, the first lower wall and the first inner side wall, and the second hollow structure has a second opening defined by the second upper wall, the second lower wall and the second inner side wall.

2. As in request item 1, the pressure-reducing mouthpiece, wherein, The first opening and the second opening each have a width between 1.4 mm and 10 mm, and the first upper wall, the second upper wall, the first lower wall and the second lower wall each have a thickness between 0.8 mm and 5 mm.

3. As in request item 2, the pressure-reducing mouthpiece, wherein, Each of the first hollow structure and the second hollow structure has a U-shaped, U-shaped, or V-shaped cross-sectional shape.

4. As in request item 1, the pressure-reducing mouthpiece, wherein, The first hollow structure has a first reinforcing device and the second hollow structure has a second reinforcing device.

5. As in request item 4, the pressure-reducing mouthpiece, wherein, The first reinforcing device includes at least one first transverse rib spanning between the first upper wall and the first lower wall of the first hollow structure, and the second reinforcing device includes at least one second transverse rib spanning between the second upper wall and the second lower wall of the second hollow structure.

6. As in request item 4, the pressure-reducing mouthpiece, wherein, The first reinforcing device includes at least one first longitudinal rib disposed between the first upper wall and the first lower wall of the first hollow structure, and the second reinforcing device includes at least one second longitudinal rib disposed between the second upper wall and the second lower wall of the second hollow structure.

7. As in request item 4, the pressure-reducing mouthpiece, wherein, The first reinforcing device includes a plurality of first protrusions disposed between the first upper wall and the first lower wall of the first hollow structure, and the second reinforcing device includes a plurality of second protrusions disposed between the second upper wall and the second lower wall of the second hollow structure.

8. As in request item 1, the pressure-reducing mouthpiece, wherein, The first hollow structure and the second hollow structure are each detachable from the left and right sides of the circumferential arc-shaped wall.

9. As in request item 1, the pressure-reducing mouthpiece, wherein, The left and right sides of the circumferential arc-shaped wall are further provided with a groove structure to increase the lateral swing amplitude of the first hollow structure and the second hollow structure.

10. The pressure relief mouthpiece of claim 1 further includes a 100-fold structure integrally formed between the first connecting portion and the second connecting portion, so as to increase the degree of flexibility of the second connecting portion relative to the first connecting portion.

11. A water activity apparatus comprising: a mask for covering a user's eyes and nose; and a snorkel having an upper end and a lower end, wherein, The upper end provides gas inlet and outlet, and a connector is provided between the upper end and the lower end for connection to the mask; characterized in that the underwater activity equipment further includes a decompression mouthpiece as claimed in any one of claims 1 to 10, provided at the lower end of the breathing tube.

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