Pressure relief mouthpiece and water sports equipment having the same

Abstract

To provide a pressure relief mouthpiece of a water sport tool including a connection part that is stored in a mouth of a user, has an annular curved wall, and is formed with a first hollow structure and a second hollow structure in right and left of the annular curved wall.SOLUTION: Hollow structures each include: an upper wall; a lower wall facing the upper wall; an inner wall connecting the upper wall and the lower wall; and a restriction wall arranged from the inner wall upward or downward. When a connection part is stored in a mouth of a user, some teeth of the user contact the upper wall and the lower wall of the hollow structures.SELECTED DRAWING: Figure 2A

Description

Technical Field

[0001] The present invention relates to a pressure relief mouthpiece for water sports equipment used in water activities such as swimming training, snorkeling, scuba diving, etc. (including activities both on the water surface and underwater).

Background Art

[0002] Currently, various water sports equipment such as swimming goggles, snorkeling masks, and scuba diving oxygen supply equipment are being sold. Among them, there are many equipment that require a mouthpiece, such as a breathing tube for swimming training, a breathing tube of a two-piece snorkel mask, and further a two-stage regulator or octopus for scuba diving. For example, FIG. 1A shows a one-piece breathing tube 101 for swimming training, and a mouthpiece M1 is provided at its lower end. Further, FIG. 1B shows a two-piece breathing tube 102 of a snorkel mask, and similarly a mouthpiece M2 is provided at its lower end.

[0003] Currently, in order to improve the comfort of the mouthpiece, manufacturers have made various improvements to the contact surface of the mouthpiece. For example, a non-slip structure is provided on the surface that contacts the user's teeth, or a softer and more comfortable material (for example, the adoption of a gel-filled pouch) is used for related parts in order to reduce the burden when the user bites with their teeth. For example, as shown in FIG. 1C, the mouthpiece M3 has a plurality of uneven patterns C1 on the tooth contact surface F1. However, all of these countermeasures are improvement measures on the premise that the user's teeth bite the mouthpiece strongly.

[0004] However, in actual use, the most comfortable state for the user to wear the mouthpiece is when the upper and lower jaws (i.e., the upper and lower teeth) are relaxed with a small gap between them. This state (i.e., the user's teeth not biting down too hard on the mouthpiece) allows for longer periods of activity. Conversely, prolonged biting down hard will quickly cause pain in the muscles around the mouth, affecting the enjoyment of snorkeling. Therefore, since snorkeling enthusiasts do not bite down too hard on the mouthpiece for most of the time during the activity, improvements made to the tooth contact surface of the mouthpiece have a very limited effect, and existing improvements still fail to meet practical needs. As shown in Figure 1D, to address the above problem, some manufacturers have incorporated a bridge B1 into the mouthpiece M4. Even when the user relaxes their mouth to bite down, the bridge B1 supports the user's palate and prevents the mouthpiece from falling out. However, this design causes discomfort to the soft tissues of the user's palate and creates a noticeable foreign body sensation in the oral cavity.

[0005] Therefore, improving the structure of the mouthpiece to solve some or all of the above problems has become an industry research and development goal. [Overview of the project] [Problems that the invention aims to solve]

[0006] The main objective of the present invention is to provide a pressure relief mouthpiece for water sports equipment, wherein the left and right side walls of the mouthpiece are formed with a hollow structure, and the hollow structure has an upper wall and a lower wall separated from the upper wall. In this design, a cushion space is substantially formed between the upper and lower walls, allowing the user's upper and lower teeth to elastically abut against the upper and lower walls, respectively, and creating room for the user's upper and lower teeth to be close to or distal to each other, thereby maintaining a natural state in which the user's mouth is slightly open. As a result, the user can stably and durablely house the mouthpiece. [Means for solving the problem]

[0007] To achieve the above objective, the present invention discloses a pressure relief mouthpiece for water sports equipment. The pressure relief mouthpiece comprises a first connecting portion configured to connect to water sports equipment, and a second connecting portion configured to fit into the user's mouth and communicating with the first connecting portion. The second connecting portion has an annular curved wall. The annular curved wall has a first hollow structure and a second hollow structure on the left and right sides, respectively. The first hollow structure comprises a first upper wall, a first lower wall opposite the first upper wall, a first inner wall connecting the first upper wall and the first lower wall, and a first limiting wall positioned upward and downward from the first inner wall. The second hollow structure comprises a second upper wall, a second lower wall opposite the second upper wall, a second inner wall connecting the second upper wall and the second lower wall, and a second limiting wall positioned upward and downward from the second inner wall. When the second connecting portion is fitted into the user's mouth, the user's upper left and lower left teeth are configured to contact the first upper wall and first lower wall of the first hollow structure, respectively, and the user's upper right and lower right teeth are configured to contact the second upper wall and second lower wall of the second hollow structure, respectively.

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

[0009] In all of the above examples, the first and second openings each have a width in the range of 2.2 mm to 15 mm, and the first upper wall, second upper wall, first lower wall, and second lower wall each have a thickness in the range of 0.8 mm to 5 mm.

[0010] In all of the above examples, the first hollow structure and the second hollow structure each have a rounded U-shape, an angular U-shape, or a V-shape cross-section.

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

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

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

[0014] In one embodiment, the first reinforcing device consists of a plurality of first protrusions arranged between the first upper wall and the first lower wall of the first hollow structure, and the second reinforcing device consists of a plurality of second protrusions arranged between the second upper wall and the second lower wall of the second hollow structure.

[0015] In all of the above examples, the first hollow structure and the second hollow structure are detachably connected to the left and right sides of the annular curved wall, respectively.

[0016] In all of the above embodiments, groove structures are formed on the left and right sides of the annular curved wall, thereby increasing the lateral movement range of the first and second hollow structures, respectively.

[0017] In all of the above embodiments, a multi-fold structure is further provided between the first connecting portion and the second connecting portion, integrally formed to increase the degree of bending freedom of the second connecting portion relative to the first connecting portion.

[0018] Furthermore, for the same purposes as described above, the present invention discloses a watersports device comprising a mask, a breathing tube, and a pressure relief mouthpiece as in any of the embodiments described above. The mask is configured to cover the user's eyes and nose. The breathing tube has an upper end and a lower end. The upper end provides an air inlet and outlet. A fastener for connecting to the mask is provided between the upper and lower ends. The pressure relief mouthpiece is provided at the lower end of the breathing tube. [Brief explanation of the drawing]

[0019] [Figure 1A] It is a schematic perspective view of a user wearing a conventional snorkel for swimming training. [Figure 1B] It is a schematic perspective view of a conventional mouthpiece for a snorkel. [Figure 1C] It is a schematic perspective view of another conventional mouthpiece, and a plurality of concave and convex anti-slip structures are provided on the surface that contacts the user's teeth. [Figure 1D] It is a schematic perspective view of yet another conventional mouthpiece, and the bridge is provided so as to be pressed against the user's upper jaw. [Figure 2A] It is a schematic perspective view of a pressure relief mouthpiece according to an embodiment of the present invention. [Figure 2B] It is a schematic top view of FIG. 2A, and the openings of the hollow structures on both sides of the pressure relief mouthpiece are rectangular U-shaped. [Figure 2C] It is a schematic top view of a pressure relief mouthpiece according to another embodiment, and the openings of the hollow structures on both sides of the pressure relief mouthpiece are V-shaped. [Figure 2D] It is a schematic top view of a pressure relief mouthpiece according to yet another embodiment, and the openings of the hollow structures on both sides of the pressure relief mouthpiece are U-shaped. [Figure 3A] It is a schematic perspective view of a pressure relief mouthpiece according to an embodiment of the present invention, and the reinforcing device disposed between the upper wall and the lower wall of the hollow structure is a horizontal rib. [Figure 3B] It is a schematic perspective view of a pressure relief mouthpiece according to another embodiment, and the reinforcing device disposed between the upper wall and the lower wall of the hollow structure is a vertical rib. [Figure 3C] It is a schematic perspective view of a pressure relief mouthpiece according to yet another embodiment, and the reinforcing device disposed between the upper wall and the lower wall of the hollow structure is a plurality of protrusions. [Figure 3D] It is a schematic perspective view of a pressure relief mouthpiece according to yet another embodiment, showing that the hollow structure is an independent detachable part. [Figure 3E] Schematic perspective view of a pressure relief mouthpiece according to yet another embodiment, showing that groove structures are formed on the left and right of the annular curved wall. [Figure 3F] Schematic perspective view of a pressure relief mouthpiece according to yet another embodiment, showing that a multi-fold structure is formed between the first connecting portion and the second connecting portion. [Figure 3G] Schematic perspective view of a pressure relief mouthpiece according to yet another embodiment, showing a groove structure and a multi-fold structure. [Figure 4A] Exemplary variations of the multi-fold structure of the present invention are shown. [Figure 4B] Exemplary variations of the multi-fold structure of the present invention are shown. [Figure 4C] Exemplary variations of the multi-fold structure of the present invention are shown. [Figure 5] Schematic perspective view showing a user wearing a water sports equipment of the present invention.

Mode for Carrying Out the Invention

[0020] It should be understood that the following description of the embodiments is for explaining the content of the present invention and does not limit the present invention described in the claims. Also, elements not directly related to the present invention are omitted from the description, and the dimensions depicted for all elements in the drawings are merely for facilitating understanding and are not intended to limit the actual scale. Further, adjectives such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc. used are referred to according to the direction of the user himself defined in the description. These are merely relative relationships and are not restrictive. When element names include "first" and "second" and only the detailed structure of one is described, it means that both have the same structure, particularly a symmetric structure. Therefore, further repetitive descriptions are omitted hereinafter.

[0021] As shown in Figure 2A, the present invention provides a pressure relief mouthpiece 2 that can be used with water sports equipment such as snorkeling mouthpiece-type breathing tubes, and any water sports equipment equipped with a mouthpiece.

[0022] The pressure relief mouthpiece 2 comprises a first connecting portion 21 and a second connecting portion 23 opposite to the first connecting portion 21. The first connecting portion 21 is configured to connect to water sports equipment (for example, the lower end of a breathing pipe). The second connecting portion 23 is housed in the user's mouth and is configured to communicate with the first connecting portion 21.

[0023] The second connecting section 23 has an annular curved wall 231, and a first hollow structure H1 and a second hollow structure H2 are formed on the left and right sides of the annular curved wall 231, respectively. The first hollow structure H1 comprises a first upper wall H11, a first lower wall H13 facing 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 positioned upward and downward from the first inner wall H15. Similarly, the second hollow structure H2 comprises a second upper wall H21, a second lower wall H23 facing 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 positioned upward and downward from the second inner wall H25.

[0024] When the second connecting portion 23 is placed in the user's mouth, the user's upper left and lower left teeth are configured to contact the first upper wall H11 and the first lower wall H13 of the first hollow structure H1, respectively, and the user's upper right and lower right teeth are configured to contact the second upper wall H21 and the second lower wall H23 of the second hollow structure H2, respectively. In this way, the annular curved wall 231 is suitably placed between the user's upper gums and upper lip, and between the user's lower gums and lower lip. Furthermore, the user's upper and lower left teeth are placed between the left side of the annular curved wall 231 and the first limiting wall H17 of the first hollow structure H1, and the user's upper and lower right teeth are placed between the right side of the annular curved wall 231 and the second limiting wall H27 of the second hollow structure H2, thereby achieving the effect of positioning the entire pressure relief mouthpiece 2 in the user's mouth. In this design, two spaces are 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, providing a relative elastic cushioning function to the upper and lower dentition.

[0025] Preferably, the first hollow structure H1 and the second hollow structure H2 may be formed from thermosetting silicone rubber or thermoplastic material and may have a Shore A hardness in the range of 30 to 90.

[0026] Furthermore, as shown in Figure 2B, when viewed from the top surface of the pressure relief 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 wall H15. The second opening H2p is defined by the second upper wall H21, the second lower wall H23, and the second inner wall H25.

[0027] Each of the first opening H1p and the second opening H2p preferably has a width W in the range of 2.2 mm to 15 mm. Each of the first upper wall H11, the second upper wall H21, the first lower wall H13, and the second lower wall H23 preferably has a thickness T in the range of 0.8 mm to 5 mm. In this way, a support height H in the range of 3 mm to 20 mm can be secured for the upper and lower teeth of the user. Preferably, the width W of each opening is in the range of 6 mm to 10 mm, and the thickness T of each upper and lower wall is in the range of 1.5 mm to 3 mm. With this configuration, the support height H for the upper and lower teeth of the user can reach 7.5 mm to 13 mm.

[0028] Each of the first hollow structure H1 and the second hollow structure H2 may have a rounded U-shaped, angular U-shaped, or V-shaped cross-section. Figure 2B illustrates that each of the first hollow structure H1 and the second hollow structure H2 has an angular U-shaped cross-section. In another embodiment, as shown in Figure 2C, each of the first hollow structure H1 and the second hollow structure H2 of the pressure relief mouthpiece 2c has a V-shaped cross-section. In yet another embodiment, as shown in Figure 2D, each of the first hollow structure H1 and the second hollow structure H2 of the pressure relief mouthpiece 2c has a rounded U-shaped cross-section.

[0029] Based on the above-described hollow structure (i.e., the first hollow structure H1 and the second hollow structure H2), a certain gap is formed between the upper and lower walls of each hollow structure. This gap is sufficient to abut against both the upper and lower dental arches, allowing the user's mouth to remain slightly open in a natural state. This results in the mouthpiece being stably housed without causing fatigue to the muscles around the user's mouth. Furthermore, even when intermittently gripping the mouthpiece tightly and bringing the upper and lower dental arches closer together, the presence of the gap does not hinder this. In other words, this structure elastically allows the upper and lower walls to move closer to and distal to each other while maintaining a natural distance where they can nearly touch the user's upper and lower dental arches. Therefore, the user can maintain a relaxed state with their mouth slightly open in most situations.

[0030] Furthermore, to maintain the distance between the upper and lower walls and prevent them from collapsing, reinforcing devices can be added to each hollow structure to improve its strength, thereby reducing the need to thicken the upper and lower walls. In detail, as shown in Figure 3A, the first hollow structure H1 of the pressure relief mouthpiece 3a may have a first reinforcing device R1 comprising at least one first transverse rib 31. Each first transverse rib 31 is positioned between the first upper wall H11 and the first lower wall H13 of the first hollow structure H1, and for example, its two ends are connected to the first upper wall H11 and the first lower wall H13. Similarly, the second hollow structure H2 of the pressure relief mouthpiece 3a may have a second reinforcing device R2 comprising at least one second transverse rib 32. Each second transverse rib 32 is positioned between the second upper wall H21 and the second lower wall H23 of the second hollow structure H2.

[0031] In another embodiment, as shown in Figure 3B, the first reinforcing device R1 of the first hollow structure H1 of the pressure relief mouthpiece 3b may comprise at least one first longitudinal rib 33. Each first longitudinal rib 33 is positioned 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 positioned on the first upper wall H11 and the first lower wall H13, respectively. Similarly, the second reinforcing device R2 of the second hollow structure H2 of the pressure relief mouthpiece 3b may comprise at least one second longitudinal rib 34. Each second longitudinal rib 34 is positioned between the second upper wall H21 and the second lower wall H23 of the second hollow structure H2.

[0032] In yet another embodiment, as shown in Figure 3C, the first reinforcing device R1 of the first hollow structure H1 of the pressure relief mouthpiece 3c may also include a plurality of first protrusions 35 positioned 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 relief mouthpiece 3c may include a plurality of second protrusions 36 positioned between the second upper wall H21 and the second lower wall H23 of the second hollow structure H2.

[0033] 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 annular curved wall 231, respectively. However, in yet another embodiment, the first hollow structure H1 and the second hollow structure H2 can be independent components and fixedly or detachably connected to the left and right sides of the annular curved wall 231, respectively, as shown in the pressure relief mouthpiece 3d in Figure 3D.

[0034] Furthermore, in the embodiment, as shown in Figure 3E, the pressure relief mouthpiece 3e may have groove structures G1 formed on the left and right sides (only one side is shown for illustrative purposes) of the annular curved wall 231. Preferably, the groove structure G1 is formed of a plurality of parallel narrow grooves having a continuous convex-concave cross-section. This design increases the likelihood that the first hollow structure H1 and the second hollow structure H2 will be close to or distal to each other. In other words, this design increases the range of movement of the annular curved wall 231 in the lateral direction (i.e., left-right direction). Thus, the annular curved wall 231 has a high degree of freedom to expand outward or contract inward. Therefore, when the user holds the mouthpiece, it can be positioned more correctly and comfortably according to the different distances between the left and right sets of teeth, and a suitable mouthpiece can be provided to a wider range of users, regardless of the shape or size of their mouth.

[0035] The groove structures G1 on each side of the annular curved wall 231 may have at least one of the following cross-sections: a continuous zigzag-shaped cross-section S1 (see Figure 4A), a continuous rectangular-shaped cross-section S2 (see Figure 4B), and a continuous convex-concave-shaped cross-section S3 (see Figure 4C).

[0036] Furthermore, in the embodiment, as shown in Figure 3F, the pressure relief mouthpiece 3f may have a multi-fold structure MF1 integrally formed between the first connecting portion 21 and the second connecting portion 23. The multi-fold structure MF1 can increase the degree of bending freedom of the second connecting portion 23 relative to the first connecting portion 21, thereby further reducing the traction load due to displacement of the mouthpiece and improving usability. The multi-fold structure MF1 may be made of thermosetting silicone rubber or thermoplastic material having a Shore A hardness in the range of 20 to 70.

[0037] Similarly, the multi-fold structure MF1 may have at least one of the following cross-sections: a continuous zigzag cross-section S1 (see Figure 4A), a continuous rectangular cross-section S2 (see Figure 4B), and a continuous convex-concave cross-section S3 (see Figure 4C).

[0038] In addition, in the embodiment, as shown in Figure 3G, the pressure relief mouthpiece 3g can incorporate both the groove structure G1 shown in Figure 3E and the multi-fold structure MF1 shown in Figure 3F. This combination can provide the mouthpiece with maximum bending freedom, both in terms of the width of the mouthpiece and in the direction in which the mouthpiece extends.

[0039] In addition to breathing tubes for swimming training and two-stage regulators or octopuses for scuba diving, the pressure relief mouthpiece of the present invention can also be used with two-piece snorkeling equipment (i.e., a combination of a breathing tube and a diving mask that does not communicate with the breathing tube), and even with other types of diving masks such as the one-piece snorkeling equipment with a mouthpiece developed by the inventors of the present invention (i.e., a breathable mask in which the breathing tube and the mask body communicate).

[0040] Taking a two-piece snorkeling setup as an example, as shown in Figure 5, the water sports equipment 5 comprises a mask 51, a breathing tube 53, and a pressure relief mouthpiece 55 (i.e., pressure relief mouthpieces 2, 2c, 2d, 3a, 3b, 3c, 3d, 3e, 3f, 3g) as described in any of the above examples or embodiments. The mask 51 is configured to cover the user's eyes and nose. The breathing tube 53 has an upper end 53a and a lower end 53b opposite to the upper end 53a. The upper end 53a provides an air inlet and outlet. A fastener 53c, which connects to the mask 51, is located between the upper end 53a and the lower end 53b. The pressure relief mouthpiece 55 is provided at the lower end 53b of the breathing tube 53.

[0041] The focus of this invention lies in the hollow structure on both sides of the mouthpiece described above. How other components are designed or how they are used in watersports equipment is not the focus of this invention. Any modifications based on the core technology described above are intended to be protected. Accordingly, the above embodiments are used only to illustrate embodiments of the invention and to illustrate the technical features of the invention, and not to limit the scope of the invention. Any modifications or equivalent arrangements that can be easily achieved by those skilled in the art are considered to fall within the scope of the invention, and the scope of the invention should be limited by the claims of the patent application.

Claims

1. A pressure relief mouthpiece for water sports equipment, A first connecting part configured to connect to the aforementioned water sports equipment, A second connecting portion is configured to be housed in the user's mouth and communicates with the first connecting portion, Equipped with, The second connecting portion has an annular curved wall on its left and right sides, with a first hollow structure and a second hollow structure formed on the left and right sides, respectively. The first hollow structure is, The first upper wall, The first lower wall facing the first upper wall, A first inner wall connected to the first upper wall and the first lower wall, A first limiting wall is arranged upward and downward from the first inner wall, A first opening defined by the first upper wall, the first lower wall, and the first inner wall, Equipped with, The second hollow structure is, The second upper wall, The second lower wall is located on the opposite side of the second upper wall, The second inner wall connected to the second upper wall and the second lower wall, A second limiting wall is positioned above and below the second inner wall, A second opening defined by the second upper wall, the second lower wall, and the second inner wall, Equipped with, When the second connecting portion is placed in the user's mouth, the user's upper left and lower left teeth are configured to contact the first upper wall and the first lower wall of the first hollow structure, respectively, and the user's upper right and lower right teeth are configured to contact the second upper wall and the second lower wall of the second hollow structure, respectively. In each of the first hollow structure and the second hollow structure, a space is formed between the upper wall and the lower wall. The aforementioned space is The device is configured to allow the user's upper and lower teeth to be close to and distal to each other without directly contacting each other, while still being able to abut both the upper and lower walls. The support height determined by the arrangement of the upper and lower walls allows the user's mouth to remain open even when the user does not bite down hard on the mouthpiece. A pressure relief mouthpiece characterized by the following features.

2. The support height of the space formed between the upper wall and the lower wall is set to a range of 3 mm or more and 20 mm or less. The support height is set within a range that maintains a non-occlusal state in which the user's upper and lower teeth do not directly contact each other, while also maintaining the open state. The pressure relief mouthpiece according to claim 1, characterized in that

3. Each of the first hollow structure and the second hollow structure has a rounded U-shape, an angular U-shape, or a V-shape cross-section. The pressure relief mouthpiece according to claim 2, characterized in that

4. The first hollow structure has a first reinforcing device, and the second hollow structure has a second reinforcing device. The pressure relief mouthpiece according to claim 1, characterized in that

5. The first reinforcing device comprises at least one first transverse rib positioned between the first upper wall and the first lower wall of the first hollow structure, and the second reinforcing device comprises at least one second transverse rib positioned between the second upper wall and the second lower wall of the second hollow structure. The pressure relief mouthpiece according to claim 4, characterized in that

6. The first reinforcing device comprises at least one first longitudinal rib positioned between the first upper wall and the first lower wall of the first hollow structure, and the second reinforcing device comprises at least one second longitudinal rib positioned between the second upper wall and the second lower wall of the second hollow structure. The pressure relief mouthpiece according to claim 4, characterized in that

7. The first reinforcing device consists of a plurality of first protrusions arranged between the first upper wall and the first lower wall of the first hollow structure, and the second reinforcing device consists of a plurality of second protrusions arranged between the second upper wall and the second lower wall of the second hollow structure. The pressure relief mouthpiece according to claim 4, characterized in that

8. The first hollow structure and the second hollow structure are detachably connected to the left and right sides of the annular curved wall, respectively. The pressure relief mouthpiece according to claim 1, characterized in that

9. A groove structure is formed on the left and right sides of the annular curved wall, thereby increasing the lateral movement range of the first hollow structure and the second hollow structure, respectively. The pressure relief mouthpiece according to claim 1, characterized in that

10. The first connecting portion and the second connecting portion further include a multi-fold structure integrally formed between them to increase the degree of bending freedom of the second connecting portion relative to the first connecting portion. The pressure relief mouthpiece according to claim 1, characterized in that

11. A water sports device comprising a mask configured to cover the user's eyes and nose, and a breathing tube having an upper end and a lower end, In the breathing tube, the upper end provides an air inlet and outlet, and a fastener for connecting to the mask is provided between the upper end and the lower end. The water sports equipment further comprises a pressure relief mouthpiece according to any one of claims 1 to 10, provided at the lower end of the breathing tube. Water sports equipment characterized by the following features.

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