underwater mask

Abstract

[Problem] To provide an underwater mask with a buckle that is separate from the mask body and has excellent operability. [Solution] The underwater mask (10) has a buckle (30) for adjusting the length of the headband (20). The buckle (30) is separate from the mask body (13) and is located at a separation point in the front-back direction (Z). It has: a locking claw (74) that engages with a locking recess (25) located on the outer surface (20b) of the headband (20); and a pair of operating parts (34) facing each other in the vertical direction (Y). The wearer restricts the length adjustment of the headband (20) by moving the buckle (30) backward, causing the locking claw (74) to engage with the locking recess (25) of the headband (20). On the other hand, the restriction is released by pressing the operating parts (34).

Description

Technical Field

[0001] This invention relates to an underwater mask having a buckle for connecting a head strap to the mask body. Prior Technology

[0002] Previously, a type of underwater mask was known, which included a buckle for connecting straps to the mask body. For example, Patent Document 1 discloses an underwater mask comprising: a mask body having a frame for fixing lenses and a skirt extending rearward from the frame; and a buckle for connecting a headband to the mask body. [Previous Technical Documents] [Patent Literature]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2004-136057 (JP2004-136057A) Summary of the Invention

[0004] [The problem the invention aims to solve] In the underwater mask disclosed in Patent Document 1, the buckle has an adjuster function that can adjust the length of the headband, thereby allowing the length of the strap to be adjusted appropriately to fit the size of the wearer's head.

[0005] However, regarding the underwater mask disclosed in Patent Document 1, the buckle system is integrally formed or connected to the mask body, which may create a rough impression with many bumps when viewed from the side underwater. Furthermore, because the mask body has a bumpy shape, it may disturb the water flow and create eddies in the water, which may obstruct the wearer's vision.

[0006] Furthermore, the different operating positions of the headband when it is taut or loose make it difficult for the wearer to distinguish, resulting in low operability. Also, to prevent the headband's folding parts from swaying, figure-eight loops are necessary, increasing the number of parts.

[0007] The subject of this invention is to provide an underwater mask that is an improvement on previous underwater masks and has a buckle that is separate from the mask body and has excellent operability. [Technical means to solve the problem]

[0008] To address the aforementioned issues, the present invention relates to an underwater mask having vertical, horizontal, and front-back directions, and comprising: a mask body, a headband connected to the mask body, and a buckle for adjusting the length of the headband.

[0009] The underwater mask of the present invention comprises: the aforementioned buckle, which is a separate entity from the aforementioned mask body, located at the separation point in the aforementioned front-rear direction, and having: a locking claw that engages with a locking recess located on the outer surface of the aforementioned headband; and a pair of operating parts facing each other in the aforementioned vertical direction. By moving the aforementioned buckle rearward, the aforementioned locking claw engages with the aforementioned locking recess of the aforementioned headband, thereby restricting the length adjustment of the aforementioned headband. On the other hand, by pressing and operating the aforementioned operating parts, the aforementioned restriction is released.

[0010] The following embodiments relate to the underwater masks shown in Figures 1-8. They are not only an indispensable component of the invention, but also include selective and preferred configurations. (1) The aforementioned buckle has a base member and a cover member that is a different individual from the aforementioned base member. The aforementioned cover member is installed on the aforementioned base member in a rotatable manner and has the aforementioned operating part. By pressing and operating the aforementioned operating part, the aforementioned cover member moves away from the aforementioned base member. (2) The aforementioned cover member has: an outer peripheral wall portion having a central opening that opens outward in the horizontal direction X, a front and rear through hole, and a locking structure located inside the outer peripheral wall portion. The aforementioned locking structure is connected to the aforementioned outer peripheral wall portion via an elastic portion extending from the aforementioned outer peripheral wall portion, and has a pair of side portions extending in the aforementioned horizontal direction in a rearward inclined manner, and a locking protrusion located between the aforementioned side portions. At the inner end of the aforementioned side portions located in the aforementioned horizontal direction, there is a sharp aforementioned locking claw. (3) The aforementioned base component has: a bottom wall portion; two side walls portion that rise from the aforementioned bottom wall portion and are opposite to each other in the aforementioned vertical direction Y and extend in the aforementioned front-back direction; front and rear through holes; a locking structure that is located at a position separate from the aforementioned bottom wall portion in a manner that connects the aforementioned two side walls portion, and the aforementioned locking structure has a locking surface locked by the aforementioned locking protrusion of the aforementioned cover component. (4) On the inner surface of the bottom wall portion of the aforementioned base component, there is a rib located opposite to the aforementioned engaging claw of the aforementioned cover component. [Effects of the Invention]

[0011] According to the present invention, the buckle and the mask body are separate entities located in a front-to-back direction, thus providing a clean appearance when viewed from the side and suppressing water turbulence near the mask body in water. Furthermore, by moving the front portion of the buckle or headband backward, the length adjustment of the headband is restricted; however, this restriction can be released by pressing the operating part, resulting in excellent operability. Simple Explanation of the Diagram

[0012] The diagram illustrates an embodiment of the underwater mask identification method of the present invention. It is not only an indispensable component of the invention, but also includes selective and preferred embodiments. [Figure 1] A perspective view of the underwater mask of the present invention. [Figure 2] (a) Side view of the buckle. (b) Enlarged top view of the headband. [Figure 3] (a) Perspective view of the buckle from the front. (b) Perspective view of the buckle from the rear. [Figure 4] An exploded 3D view of the buckle from the front. [Figure 5] Exploded perspective view of the buckle from the rear. [Figure 6] Cross-sectional view along line VI(a)-VI(a) shown in Figure 3(a). (b) Cross-sectional perspective view of the buckle. [Fig. 7] A cross-sectional view along line VII(a)-VII(a) shown in Fig. 2(a). (b) A cross-sectional view along line VII(b)-VII(b) shown in Fig. 2(a). [Figure 8] (a) The same state as Figure 7(a) where the headband is loosened. (b) The same state as Figure 7(b) where the headband is loosened. Implementation

[0013] The details of the underwater mask 10 of the present invention will be explained with reference to the accompanying drawings as follows. In Figure 1, the front-to-back direction of the underwater mask 10 is represented by Z, the up-and-down direction by Y, and the horizontal direction by X. Furthermore, the CC line is an imaginary center line that bisects the horizontal dimension X of the underwater mask 10. The underwater mask 10 is symmetrical about the imaginary center line CC. The term "inner side" (or "inner side") in the horizontal direction X refers to the direction towards the imaginary center line CC, and the term "outer side" (or "outer side") in the horizontal direction X refers to the opposite direction. Furthermore, in each figure, for ease of explanation, the headband 20 and its insertion hole are given a light ink color.

[0014] As shown in Figure 1, the underwater mask 10 comprises: a mask body 13, a frame 12 inlaid with a pair of lenses 11, and a flexible skirt 15 extending rearward from the frame 12; a headband 20; and a buckle 30 for adjusting the length of the headband 20. In the example shown, the lenses 11 are formed as a pair of transparent plates, but they can also be formed as a single, continuous transparent plate.

[0015] The frame 12 and buckle 30 are made of rigid plastic. On the other hand, the skirt 15 and headband 20 are made of soft materials, such as natural or synthetic rubber, silicone resin, thermoplastic synthetic resin, etc.

[0016] The headband 20 is used to attach to the hanging part 18 of the mask body 13 and is located on both sides of the skirt 15.

[0017] Referring to Figures 1 and 2, the headband 20 has a bifurcated central portion 21 that abuts against the back of the wearer's head, and first and second extensions 22 and 23 on either side thereof. The headband 20 has an inner surface 20a facing the wearer's face, and an outer surface 20b on the opposite side. Furthermore, regarding the shape of the headband 20, conventional designs may also be used in addition to the examples shown in the figures.

[0018] On the outer surface 20b of the first and second extensions 22 and 23, there are a plurality of engaging recesses (engaging grooves) 25 arranged at intervals in the length and lateral directions of the headband 20, and a flat portion 26 located between the engaging recesses 25. That is, the flat portion 26 is the part of the outer surface of the headband 20 where the plurality of engaging recesses 25 are not formed.

[0019] Furthermore, the first and second extensions 22 and 23 each have: base portions 22B and 23B, which are adjacent to the central portion 21 in a reversed state across the hanging portion 18 and are located on the wearer's face side; and front portions 22A and 23A located opposite the base portions 22B and 23B. In the following description, only the first extension 22 and the buckle 30 of the first and second extensions 22 and 23 of the headband 20 will be described; however, the second extension 23 also has the same configuration. However, depending on the necessity, the buckle 30 may be installed on only one side of the first and second extensions 22 and 23 of the headband 20.

[0020] Referring to Figures 3(a) and (b), the buckle 30 has: an outer surface 30b located on the opposite side to the inner surface 30a facing the wearer's face; a front end 31; a rear end 32; a middle part 33 located between the front and rear ends 31 and 32; and a pair of operating parts 34 located opposite each other in the vertical Y direction.

[0021] The buckle 30 includes a base member 40 and a cover member 60, which is a separate entity from the base member 40 and is installed in a manner that allows it to be separated from the base member 40. Furthermore, the buckle 30 has a center line Q that bisects the dimension Z in the front-rear direction (see Figure 6(a)).

[0022] According to the underwater mask 10 of the present invention, the buckle 30 for adjusting the length of the headband 20 is a separate entity from the mask body 13 and is located at a position separated in the front-to-back Z direction, thus giving the mask body 13 a clean appearance when viewed from the side. Furthermore, the mask body 13 has a textured and angular shape on its side, which could potentially create eddies in turbulent water flow and obstruct vision, thus this situation can be avoided.

[0023] The buckle 30 can be made of any known material, such as natural or synthetic rubber, plastic, or metal. The base member 40 and the cover member 60 are formed of a flexible material, preferably the cover member 60, which is more flexible than the base member 40. By making the cover member 60 more flexible than the base member 40, the operating part 34 of the cover member 60 can be easily deformed during headband 20 length adjustment, and the cover member 60 can be easily moved away from the base member 40 via the operating part 34.

[0024] Furthermore, it is preferable that the base member 40 and the cover member 60 are made of different materials. When they are made of the same material, noise (resonance) is easily generated when locked by the locking mechanism formed by the locking structure 50 and the locking structure 70. However, by making them of different materials, this noise can be suppressed. Specifically, for example, the cover member 60 can be formed of polyacetal resin and the base member 40 can be formed of polycarbonate resin.

[0025] Referring to Figures 4 and 5, the base member 40 includes: front and rear ends 40a and 40b; a bottom wall portion 41 located opposite the wearer's head; two side walls 42 extending vertically from the bottom wall portion 41, facing each other in the vertical direction Y and extending in the front-back direction Z; a front insertion hole 43 located on the front end 40a side; and a locking structure 50 located at the point separated from the bottom wall portion 41, connecting the two side walls 42. A rear insertion hole 45 is formed between the rear end of the locking structure 50 and the rear ends of the two side walls 42. The rear insertion hole 45 communicates with the front insertion hole 43 in the front-back direction Z, forming a base insertion hole through which the base portion 22B of the headband 20 is inserted.

[0026] The locking structure 50 has a locking portion 51 protruding toward the cover member 60, and two guide protrusions 52 located on both sides of the locking portion 51 in the vertical direction Y.

[0027] On the rear end 40b side of the two side wall portions 42 of the base member 40, there is a shaft portion 46 protruding in a vertical direction Y. On the front end 40a side of the two side wall portions 42, there is a pressed protrusion 47 protruding in a vertical direction Y, which abuts against the pressing protrusion 34b of the operating portion 34 of the cover member 60. Furthermore, a through hole 48 is formed in the central part of the bottom wall portion 41 of the base member 40.

[0028] The cover component 60 has: front and rear ends 60a and 60b; an outer peripheral wall portion 62 with a central opening 61 extending outward in the lateral direction X; a front insertion hole 63 located on the front end 60a side of the outer peripheral wall portion 62; a rear insertion hole 64 located on the rear end 60b side of the outer peripheral wall portion 62; and a locking structure 70 located inside the outer peripheral wall portion 62. The rear end of the outer peripheral wall portion 62 has a shape that becomes thinner towards the rear.

[0029] The locking structure 70 is connected to the outer peripheral wall portion 62 via an elastic portion (wrist, connecting portion) 75 extending inward from the rear end side. It has a pair of side portions 71 extending laterally in the X direction from the elastic portion 75 at an angle to the rear, and a locking protrusion 72 located between the side portions 71, whose length in the X direction is shorter than these. An outwardly protruding portion 73 is formed at the outer end of the side portions 71 on the outer side in the X direction. Furthermore, a sharp locking claw 74 is present at the inner end of the side portions 71 on the inner side in the X direction. The locking protrusion 72 is generally triangular in cross-section.

[0030] The locking structure 50 is only connected to the elastic part 75 and the outer peripheral wall part 62; the rest is not fixed. In the locking mechanism formed by the locking structure 50 and the locking structure 70, the locking protrusion 72 is pushed backward by the elastic action of the elastic part 75 against the locking part 51. When adjusting the length of the headband 20, the elastic part 75 twists and the locking protrusion 72 slides from the locking part 51.

[0031] On the rear end 60b side of the outer peripheral wall portion 62 of the cover member 60, there is a pair of shaft holes 66 through which the shaft portion 46 of the base member 40 is inserted. On both sides (upper and lower sides) of the outer peripheral wall portion 62, there are operating portions 34. Each operating portion 34 has: a base end located near the shaft holes 66; and an extension portion separating from the outer peripheral wall portion 62 and extending forward from the base end. On the outer surface of the extension portion of the operating portion 34, there are a plurality of protrusions 34a arranged in the front-rear direction.

[0032] Referring to Figure 6(a), in the use state of the buckle 30, the shaft portion 46 of the base member 40 is inserted into the shaft hole 66 of the cover member 60, and the cover member 60 is mounted to the base member 40 so that it can rotate in the arrow direction R1. Furthermore, the base end portion 22B of the first extension portion 22 of the headband 20 is inserted into the base insertion hole of the base member 40, and the front end portion 22A is inserted into the cover insertion hole of the cover member 60.

[0033] In the assembled state of buckle 30, the locking protrusion 72 of the locking structure 70 of cover member 60 is located opposite the locking portion 51 of base member 40 in the transverse X direction, so that the locking protrusion 72 is locked in the locking portion 51. When assembling buckle 30, with the shaft portion 46 of base member 40 inserted into the shaft hole 66 of cover member 60, cover member 60 is pressed against base member 40. In this way, the locking protrusion 72 of cover member 60 slides against the locking portion 51 and moves towards the bottom wall portion 41 of base member 40, and the locking protrusion 72 is locked in the locking portion 51, and cover member 60 and base member 40 are connected to each other.

[0034] The locking portion 51 of the base member 40 has: a front region 81 that abuts against the locking protrusion 72 of the cover member 60; and a rear region 82 that extends rearward from the front region 81. The front region 81 of the locking portion 51 has: a locking surface 83 that abuts against the locking protrusion 72; and a raised portion 84 that extends outward in the lateral direction X from the locking surface 83. The rear region 82 of the locking portion 51 extends in a manner that gradually thins outward from the front region 81, and its rear end has a rear protrusion 85 that protrudes slightly outward in the lateral direction.

[0035] In Figure 6(b), the direction of travel of the front end portion 22A of the first extension 22 of the headband 20 when the buckle 30 is installed on the headband 20 is indicated by arrow E. As shown, firstly, the front end portion 22A of the headband 20 is inserted into the buckle 30 from the rear end 40b of the base member 40 and inserted through to the base insertion hole. Next, the front end portion 22A is wrapped around the hook portion 18 of the mask body 13 and reversed, and then inserted through to the front insertion hole 63 located on the front end 60a side of the mask member 60. The front end portion 22A abuts against the inclined front surface of the locking structure 70 and is guided upward. When the wearer takes it off, the front end portion 22A is facing upward, so that the front end portion 22A is inserted between the locking structure 70 and the outer peripheral wall portion 62. It is pulled downward in a way that passes through the outer peripheral wall portion 62 and pulled out directly from the rear insertion hole 64, through which the front end portion 22A is inserted into the cover insertion hole.

[0036] As explained, the locking structure 70, with its inclined front surface, functions as a guide when the front end portion 22A of the headband 20 is inserted. Furthermore, the curved rear surface of the locking structure 50 functions as a guide when the front end portion 22A is stretched downwards through the outer peripheral wall portion 62. Additionally, the rear protrusion 85 at the rear end of the locking structure 50, protruding outwards in the lateral direction X, functions as a guide to insert the front end portion 22A into the rear through hole 64.

[0037] With the buckle 30 installed, the engaging claw 74 of the locking structure 70 engages with the engaging recess 25 of the front end portion 22A of the headband 20. The base portion 22B of the headband 20 is secured by the engaging claw 74 of the locking structure 70. In addition, the front end portion 22A is secured by the protrusion 73, thereby more stably fixing the headband 20 to the buckle 30, and further tightening it to the head from the portion secured by the protrusion 73, thus improving the fit.

[0038] On the inner surface of the bottom wall portion 41 of the base member 40, there is a pair of ribs 49 that protrude in a manner opposite to a pair of engaging claws 74 of the cover member 60 and extend in a front-rear direction Z. When the base end portion 22B of the headband 20 is inserted into the base insertion hole, the engaging claws 74 engage with the engaging recess 25, and the base end portion 22B is clamped by the engaging claws 74 and the ribs 49, thereby achieving a more stable locking compared to the case without ribs 49.

[0039] Optionally, a generally quadrangular through hole 48 is formed on the bottom wall portion 41 of the base member 40. The through hole 48 is located opposite to the locking mechanism formed by the locked structure 50 and the locking structure 70 in the horizontal direction X. Therefore, when performing a release operation on the locking mechanism, if the lock cannot be released, the operating rod is inserted into the through hole 48, thereby allowing the locking protrusion 72 to be pushed up through the base portion 22B of the headband 20 to release the lock.

[0040] Referring to Figures 6(a) and 7(a) and (b), in the assembled state of the buckle 30, the rear surface of the locking protrusion 72 of the cover member 60 and the locking surface 83 of the locking portion 51 of the base member 40 are in contact with each other in an inclined state relative to the center line Q. In the installed state of the underwater mask 10, a tensile force is applied to the front end portion 22A of the headband 20 inserted into the cover insertion hole of the cover member 60 in the direction of arrow K1, and a tensile force is applied to the base end portion 22B inserted into the base insertion hole of the base member 40 in the direction of arrow K2.

[0041] In the installed state, the wearer unbuckles the buckle 30 or the front end 22A of the headband 20 and pulls it backward, thereby giving the locking structure 70 the required flexibility and pushing it backward through the elastic part 75. The engaging claw 74 at its inner end engages with the engaging recess 25 of the base end 22B of the headband 20, pressing the base end 22B between the engaging claw 74 and the rib 49 of the bottom wall 41. This inhibits the movement of the headband 20, locking it in a locked state.

[0042] Thus, according to the present invention, the wearer can easily restrict the movement of the headband 20 by simply unhooking the buckle 30 or the front end portion 22A and moving it backward, thus providing excellent operability.

[0043] As shown in Figure 6(a), the imaginary line T connecting the rotation axis AX of the base member 40 of the cover member 60 and the center point O of the locking surface 83 of the locking part 51 (so that the length of the locking surface 83 is equal) and the inner side of the transverse direction X of the locking surface 83 intersects the line α with a value of 20~60°, preferably 40~50°.

[0044] When the angle α is less than 20°, in cross-section, compared to the illustrated state, the locking protrusion 72 appears to be upright, and there is a risk that the force of pressing the locking protrusion 72 formed by the base portion 22B of the headband 20 against the locked portion 51 will cause the cover member 60 to move away from the base member 40. On the other hand, when the angle α exceeds 60°, in cross-section, compared to the illustrated state, the locking structure 70 will be tilted, and the locking claw 74 will bite into the locking recess 25 significantly. When adjusting the length of the headband 20, the locking claw 74 will be difficult to disengage from the locking recess 25.

[0045] The raised portion 84 is located on the front end 40a side of the locked portion 51 of the base member 40, and is formed with a wall thickness compared to the rear end side 40b. In this way, in the event of an external impact to the buckle 30, the locking protrusion 72 can be prevented from accidentally crossing the locked portion 51 in the lateral direction X, thereby preventing the connection between the cover member 60 and the base member 40 from being released.

[0046] The two side portions 71 of the locking structure 70 of the cover member 60 are formed as relatively thin walls with a thickness dimension D1 of 1.0~1.5mm. In this way, the two side portions 71 of the locking structure 70 are formed as relatively thin walls with the required strength, so that they can bend in a manner that follows the movement of the headband 20 without breaking, thereby preventing the locking caused by the locking claw 74 from being released.

[0047] Referring to Figures 7(b) and 8(a) and (b), when adjusting the length of the headband 20, the wearer holds the buckle 30 with one hand and presses one of the operating parts 34 of the cover member 60 in the direction of arrow P1. This causes the pressing protrusion 34b of the operating part 34 to slide against the pressed protrusion 47, and the cover member 60 moves laterally outward in the X direction away from the base member 40. This creates a gap S1 between the front end of the cover member 60 and the front end of the base member 40, releasing the engagement created by the engaging claw 74 and the engaging recess 25. The base portion 22B of the headband 20, which was clamped by the engaging claw 74 and the bottom wall portion 41 of the base member 40, becomes free.

[0048] Thus, when the wearer presses down on the pair of operating parts 34 with one hand, and uses the other hand to grasp the front end 22A of the headband 20 and pull it in the opposite direction of arrow K1, the outer circumference of the headband 20 decreases during installation, thereby increasing the tension of the headband 20. On the other hand, when the wearer moves the front end 22A in the direction of arrow K1 into the buckle 30, the outer circumference of the headband 20 increases, and the tension of the headband 20 decreases.

[0049] After adjusting the length of the headband 20 to fit the size of their head, if the wearer removes their fingers from the operating part 34, the pressing protrusion 34b of the operating part 34 will slide into the pressed protrusion 47, moving inward in the lateral direction X as the cover member 60 approaches the base member 40, and returning to its original state before the pressing operation. In this state, if the wearer pulls the buckle 30 or the front part 22A backward, the locking claw 74 will engage with the locking recess 25, thus locking the headband 20 to a restricted position.

[0050] In this way, the wearer can easily and freely change the length of the headband 20 by using one hand to hold the buckle 30 and press it, while using the other hand to stretch or push the front part 22A of the headband 20. Therefore, the wearer has excellent operability.

[0051] Although not illustrated, the buckle 30 can also be formed as a single piece. For example, it can be formed as a single piece in a way that prevents the rear end 32 of the buckle 30 from being separated, while allowing the middle part 33 to be separated from the front end 31. However, as in this embodiment, by constructing the buckle 30 from different individual parts, the manufacturing process is simpler and manufacturing costs can be reduced compared to forming it as a single piece.

[0052] Furthermore, since the buckle 30 is composed of two components, a base component 40 and a cover component 60, the number of components is relatively small, which can reduce manufacturing costs and facilitate assembly. Moreover, by making the base component 40 and the cover component 60 different individuals, for example, in the event of damage to the elastic part 75 of the cover component 60, only the cover component 60 can be replaced and the base component 40 can be reused, thus achieving excellent economic efficiency.

[0053] In this specification, the constituent materials of the underwater mask 10 can be any of the commonly known materials generally used in this field, except as otherwise specifically described.

[0054] 10: Underwater mask 13: Mask body 20: Headband 25: Engagement recess 30: Buckle 34: Operations Department 40: Base components 41: Bottom wall 42: Side walls 43: Front insertion hole 45: Rear through hole 49: Ribs 50: Stuck Construct 60: Cover component 61: Central opening 62: Peripheral wall portion 63: Front through hole 64: Rear through hole 70: Locking Structure 71: Both sides 72: Stop protrusion 74: Claw Engagement 75: Elastic part 83: Stuck face X: horizontal direction Y: Up / Down direction Z: Forward / backward direction

Claims

1. A water mask having a vertical direction, a front-back direction, and a horizontal direction, and comprising: a mask body, a headband connected to the mask body, and a buckle for adjusting the length of the headband; the water mask is characterized in that: the buckle is a separate entity from the mask body, located at a separation point in the front-back direction, and has: a locking claw that engages with a locking recess located on the outer surface of the headband; and a pair of operating parts facing each other in the vertical direction, wherein by moving the buckle rearward, the locking claw engages with the locking recess of the headband, thereby restricting the length adjustment of the headband; and by pressing the operating parts, the restriction is released.

2. The underwater mask as described in claim 1, wherein, The aforementioned buckle has a base member and a cover member that is separate from the base member. The cover member is mounted on the base member in a rotatable manner and has the aforementioned operating part. By pressing the operating part, the cover member moves away from the base member.

3. The underwater mask as described in claim 2, wherein, The aforementioned cover member has: an outer peripheral wall portion having a central opening that opens outward in the horizontal direction X, front and rear through holes, and a locking structure located inside the outer peripheral wall portion. The aforementioned locking structure is connected to the aforementioned outer peripheral wall portion via an elastic portion extending from the aforementioned outer peripheral wall portion, and has a pair of side portions extending in the aforementioned horizontal direction in a rearward inclined manner, and a locking protrusion located between the aforementioned side portions. At the inner end of the aforementioned side portions located in the aforementioned horizontal direction, there is a sharp aforementioned locking claw.

4. The underwater mask as described in claim 3, wherein, The aforementioned base component has: a bottom wall portion; two side walls that rise from the aforementioned bottom wall portion and are opposite each other in the aforementioned vertical direction Y and extend in the aforementioned front-back direction; front and rear through holes; and a locking structure that is located at a position separate from the aforementioned bottom wall portion in a manner that connects the aforementioned two side walls, the aforementioned locking structure having a locking surface locked by the aforementioned locking protrusion of the aforementioned cover component.

5. The underwater mask as described in claim 4, wherein, On the inner surface of the bottom wall portion of the aforementioned base member, there is a rib located opposite to the engaging claw of the aforementioned cover member.

Images