Swim mask

Abstract

We offer a diving mask that features a buckle separate from the mask body, providing excellent operability. [Solution] The underwater mask 10 is equipped with a buckle 30 for adjusting the length of the head strap 20. The buckle 30 is separate from the mask body 13 and is located spaced apart in the front-rear direction Z. It has an engaging claw 74 that engages with an engaging recess 25 located on the outer surface 20b of the head strap 20, and a pair of operating parts 34 that are located opposite each other in the up-down direction Y. When the wearer moves the buckle 30 backward, the engaging claw 74 engages with the engaging recess 25 of the head strap 20, restricting the length adjustment of the head strap 20. Conversely, pressing the operating parts 34 releases the restriction.

Description

Technical Field

[0001] The present invention relates to an underwater mask provided with a buckle for connecting a head strap to a mask body.

Background Art

[0002] Conventionally, an underwater mask provided with a buckle for connecting a strap to a mask body is known. For example, Patent Document 1 discloses an underwater mask including a mask body having a lens frame for fixing a lens and a skirt extending rearward from the lens frame, and a buckle for connecting a head strap to the mask body.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the underwater mask disclosed in Patent Document 1, since the buckle has an adjuster function for adjusting the length of the head strap, the length of the strap can be appropriately adjusted according to the size of the wearer's head.

[0005] However, in the underwater mask disclosed in Patent Document 1, since the buckle is integrally formed or connected to the mask body, there is a possibility of giving a boneless impression with many irregularities in a side view of the underwater mask. Further, since the mask body has a shape with many irregularities, there is also a possibility that the water flow is disturbed in water and vortices are generated, blocking the wearer's field of vision.

[0006] Furthermore, the operating position differed when tightening and loosening the head strap, making it confusing for the wearer and resulting in poor operability. In addition, a figure-eight ring was required to prevent the folded portion of the head strap from flapping, increasing the number of parts.

[0007] The object of the present invention is to improve upon conventional underwater masks and to provide an underwater mask equipped with a buckle that is separate from the mask body and offers excellent operability. [Means for solving the problem]

[0008] To solve the aforementioned problems, the present invention relates to an underwater mask having vertical, front-back, and lateral directions, comprising a mask body, a head strap connected to the mask body, and a buckle for adjusting the length of the head strap.

[0009] The underwater mask according to the present invention is characterized in that the buckle is separate from the mask body, is located at a distance from the front-rear direction, has an engaging claw that engages with an engaging recess located on the outer surface of the head strap, and has a pair of operating parts located opposite each other in the vertical direction, and by moving the buckle backward, the engaging claw engages with the engaging recess of the head strap, thereby restricting the length adjustment of the head strap, while by pressing the operating parts, the restriction is released.

[0010] The embodiments described below relate to the underwater mask shown in Figures 1 to 8 and include not only essential components of the invention but also selective and preferred components. (1) The buckle comprises a base member and a cover member separate from the base member, the cover member being pivotably attached to the base member and having an operating part, the cover member moving away from the base member by pressing the operating part. (2) The cover member has an outer peripheral wall portion having a central opening that opens outward in the lateral direction X, front and rear insertion holes, and a locking structure located within the outer peripheral wall portion. The locking structure is connected to the outer peripheral wall portion via an elastic portion extending from the outer peripheral wall portion and has a pair of side portions that extend laterally so as to be inclined rearward, and a locking projection located between the side portions. The inner ends of the side portions located on the outward side in the lateral direction are provided with sharp engaging claws. (3) The base member has a bottom wall portion, side wall portions that rise from the bottom wall portion and face each other in the vertical direction Y and extend in the front-rear direction, front-rear insertion holes, and a locking structure that is located apart from the bottom wall portion so as to connect the side wall portions, the locking structure has a locking surface into which the locking projection of the cover member is locked. (4) Ribs are located on the inner surface of the bottom wall portion of the base member, facing the engaging claws of the cover member. [Effects of the Invention]

[0011] According to the underwater mask of the present invention, the buckle is separate from the mask body and is positioned at a distance from it in the front-to-back direction. As a result, the mask body has a clean appearance when viewed from the side, and it is possible to suppress turbulence in the water flow near the mask body while underwater. Furthermore, the length adjustment of the head strap is restricted by moving the tip of the buckle or head strap to the rear, while this restriction is released by pressing the operating part, resulting in excellent operability. [Brief explanation of the drawing]

[0012] The drawings illustrate specific embodiments of the underwater mask according to the present invention, including not only essential components of the invention but also selective and preferred embodiments. [Figure 1] A perspective view of the underwater mask according to the present invention. [Figure 2] (a) Side view of the buckle. (b) Enlarged plan view of a portion of the head strap. [Figure 3](a) Perspective view of the buckle from the front. (b) Perspective view of the buckle from the rear. [Figure 4] Decomposed perspective view of the buckle in a front view. [Figure 5] Decomposed perspective view of the buckle from the rear. [Figure 6] (b) Cross-sectional view along the line VI(a)-VI(a) shown in Figure 3(a). [Figure 7] (b) A cross-sectional view along the line VII(a)-VII(a) shown in Figure 2(a). [Figure 8] (a) A diagram similar to Figure 7(a) showing the head strap in a released state. (b) A diagram similar to Figure 7(b) showing the head strap in a released state. [Modes for carrying out the invention]

[0013] The details of the underwater mask 10 according to the present invention will be described below with reference to the attached drawings. In Figure 1, the front-to-back direction of the underwater mask 10 is indicated by Z, the up-and-down direction by Y, and the lateral direction by X. The CC line is a virtual center line that bisects the lateral X dimension of the underwater mask 10, and the underwater mask 10 is symmetrical with respect to the virtual center line CC. The inward (inside) direction of the lateral X refers to the direction toward the virtual center line CC, and the outward (outside) direction of the lateral X refers to the opposite direction. Furthermore, in each figure, for the sake of clarity, the head strap 20 and the insertion hole through which it is inserted are colored in light gray.

[0014] As shown in Figure 1, the underwater mask 10 comprises a mask body 13 having a lens frame 12 into which a pair of lenses 11 are fitted, a flexible skirt 15 extending rearward from the lens frame 12, a head strap 20, and a buckle 30 for adjusting the length of the head strap 20. In the illustrated example, the lenses 11 are formed from a pair of transparent plates, but they may be formed from a single continuous transparent plate.

[0015] The lens frame 12 and the buckle 30 are formed from a rigid plastic material. On the other hand, the skirt 15 and the head strap 20 are formed from a soft material, for example, natural or synthetic rubber, silicone resin, thermoplastic synthetic resin, etc.

[0016] The hanging portions 18 for attaching the head strap 20 to the mask body 13 are located on both sides of the skirt 15.

[0017] Referring to FIGS. 1 and 2, the head strap 20 has a bifurcated central portion 21 that abuts against the back of the wearer's head and first and second extending portions 22, 23 located on both sides thereof. The head strap 20 has an inner surface 20a facing the wearer's face and an outer surface 20b located on the opposite side thereof. Note that, regarding the outer shape of the head strap 20, in addition to the illustrated example, known ones can be adopted.

[0018] The outer surface 20b of the first and second extending portions 22, 23 has a plurality of engaging recesses (engaging grooves) 25 arranged at intervals in the longitudinal and lateral directions of the head strap 20, and a flat portion 26 located between the engaging recesses 25. That is, it can be said that the flat portion 26 is a portion of the outer surface of the head strap 20 where no plurality of engaging recesses 25 are formed.

[0019] Further, the first and second extending portions 22, 23 have proximal end portions 22B, 23B that are adjacent to the central portion 21 and located on the wearer's face side, and distal end portions 22A, 23A that are located opposite thereto, in a state of being inverted via the hanging portions 18. In the following description, only the first extending portion 22 of the first and second extending portions 22, 23 of the head strap 20 and the buckle 30 will be described, but the second extending portion 23 has the same configuration. However, if necessary, the buckle 30 may be attached only to one side of the first and second extending portions 22, 23 of the head strap 20.

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

[0021] The buckle 30 includes a base member 40 and a cover member 60 that is separate from the base member 40 and detachably attached to the base member 40. The buckle 30 also has a transverse center line Q that bisects the dimension in the front-rear direction Z (see Figure 6(a)).

[0022] In the underwater mask 10 according to the present invention, the buckle 30 for adjusting the length of the head strap 20 is separate from the mask body 13 and is positioned at a distance from it in the front-to-back direction Z, so the mask body 13 has a clean appearance when viewed from the side. Furthermore, if the sides of the mask body 13 have a rough, uneven shape, the water flow in the water may be disturbed, creating vortices that obstruct the view, but this situation can be avoided.

[0023] The buckle 30 can be made from any known material, such as natural or synthetic rubber, plastic, or metal, without limitation. The base member 40 and the cover member 60 are made from a flexible material, and it is preferable that the cover member 60 is made from a material with higher flexibility than the base member 40. The higher flexibility of the cover member 60 compared to the base member 40 makes it easier to flexibly deform the operating part 34 of the cover member 60 when adjusting the length of the head strap 20, and also makes it easier to move the cover member 60 away from the base member 40 using the operating part 34.

[0024] Furthermore, it is preferable that the base member 40 and the cover member 60 are formed from different materials. If they are formed from the same material, abnormal noise (resonance) is likely to occur when the locking mechanism between the locked structure 50 and the locking structure 70 is locked, but such abnormal noise can be suppressed by forming them from different materials. Specifically, for example, the cover member 60 can be formed from polyacetal resin and the base member 40 from polycarbonate resin.

[0025] Referring to Figures 4 and 5, the base member 40 has front and rear ends 40a, 40b, a bottom wall portion 41 positioned opposite the wearer's head, side wall portions 42 that rise from the bottom wall portion 41 and extend in the front-rear direction Z opposite each other in the vertical direction Y, a front insertion hole 43 located on the front end 40a side, and a locking structure 50 positioned apart from the bottom wall portion 41 so as to connect the side wall portions 42. A rear insertion hole 45 is formed between the rear end of the locking structure 50 and the rear ends of the side wall portions 42, and the rear insertion hole 45 communicates with the front insertion hole 43 in the front-rear direction Z, forming a base insertion hole through which the base end portion 22B of the head strap 20 is inserted.

[0026] The locking structure 50 has a locking portion 51 that protrudes toward the cover member 60, and two side 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 both side walls 42 of the base member 40, there is a shaft portion 46 that protrudes in the vertical direction Y, and on the front end 40a side of both side walls 42, there is a pressed projection 47 that protrudes in the vertical direction Y and is in contact with the pressing projection 34b of the operating portion 34 of the cover member 60. In addition, a through hole 48 is formed in the central part of the bottom wall portion 41 of the base member 40.

[0028] The cover member 60 has front and rear ends 60a, 60b, an outer peripheral wall portion 62 having a central opening 61 that opens 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 50b 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 gradually becomes thinner towards the rear.

[0029] The locking structure 70 is connected to the outer peripheral wall portion 62 via an elastic portion (arm portion, connecting portion) 75 extending inward from the rear end of the outer peripheral wall portion 62. It has a pair of side portions 71 that extend laterally in the direction X so as to be inclined backward from the elastic portion 75, and a locking projection 72 located between the side portions 71, which is shorter in length in the direction X than the side portions 71. Outwardly projecting protrusions 73 are formed at the outer ends of the side portions 71 located on the outward side in the direction X. Also, sharp engaging claws 74 are located at the inner ends of the side portions 71 located on the inward side in the direction X. The locking projection 72 has a substantially triangular shape in cross-section.

[0030] The locked structure 50 is connected to the outer peripheral wall portion 62 only at the elastic portion 75, and the rest of it is not fixed. In the locking mechanism of the locked structure 50 and the locking structure 70, the locking projection 72 is biased backward by the elastic action of the elastic portion 75 so as to contact the locked portion 51, and when the length of the head strap 20 is adjusted, the elastic portion 75 twists and the locking projection 72 slides away from the locked portion 51.

[0031] A pair of shaft holes 66 are located at the rear end 60b side of the outer peripheral wall portion 62 of the cover member 60, through which the shaft portion 46 of the base member 40 is inserted. Operating portions 34 are located on both sides (upper and lower sides) of the outer peripheral wall portion 62. The operating portion 34 has a base end located near the shaft holes 66 and an extended portion that extends forward from the base end, separated from the outer peripheral wall portion 62. Multiple protrusions 34a are located on the outer surface of the extended portion of the operating portion 34, arranged in the front-rear direction.

[0032] Referring to Figure 6(a), in the usage state of the buckle 30, the shaft portion 46 of the base member 40 is inserted through the shaft hole 66 of the cover member 60, and the cover member 60 is attached to the base member 40 so as to be able to pivot in the direction of the arrow R1. In addition, the base end portion 22B of the first extension portion 22 of the head strap 20 is inserted through the base insertion hole of the base member 60, and the tip portion 22A is inserted through the cover insertion hole of the cover member 60.

[0033] In the assembled state of the buckle 30, the locking projection 72 of the locking structure 70 of the cover member 60 is positioned opposite the locked portion 51 of the base member 40 in the lateral direction X, and the locking projection 72 is locked to the locked portion 51. When assembling the buckle 30, with the shaft portion 46 of the base member 40 inserted into the shaft hole 66 of the cover member 60, the cover member 60 is pressed against the base member 40, causing the locking projection 72 of the cover member 60 to slide against the locked portion 51 and move toward the bottom wall portion 41 of the base member 40, thereby locking the locking projection 72 to the locked portion 51 and connecting the cover member 60 and the base member 40.

[0034] The locking portion 51 of the base member 40 has a front area 81 that abuts against the locking projection 72 of the cover member 60, and a rear area 82 that extends rearward from the front area 81. The front area 81 of the locking portion 51 has a locking surface 83 that abuts against the locking projection 72, and a raised portion 84 that extends outward in the lateral direction X from the locking surface 83. The rear area 82 of the locking portion 51 extends from the front area 81 so as to become progressively thinner towards the rear, and its rear end has a rearward protrusion 85 that is slightly convex outward in the lateral direction.

[0035] In Figure 6(b), arrow E indicates the direction of travel of the tip portion 22A of the first extension portion 22 of the head strap 20 when attaching the buckle 30 to the head strap 20. As shown in the figure, first, the tip portion 22A of the head strap 20 is inserted into the buckle 30 from the rear end 40b of the base member 40 and inserted through the base insertion hole. Next, the tip portion 22A is wrapped around the loop portion 18 of the mask body 13 and reversed, and inserted through the front insertion hole 63 located on the front end 60a side of the cover member 60. The tip portion 22A comes into contact with the inclined front surface of the locking structure 70 and is guided upward, and the wearer grasps the upward-facing tip portion 22A and inserts it between the locking structure 70 and the outer peripheral wall portion 62, pulling it downward so that it passes under the outer peripheral wall portion 62, and then pulls it out from the rear insertion hole 64, thereby inserting the tip portion 22A into the cover insertion hole.

[0036] As previously described, the locking structure 70, having an inclined front surface, can function as a guide when inserting the tip portion 22A of the head strap 20. In addition, the rear surface of the locked structure 50 is curved and functions as a guide when the tip portion 22A is pulled downward so as to pass through the outer peripheral wall portion 62. Furthermore, the rear projection 85 that protrudes outward in the lateral direction X at the rear end of the locked structure 50 can function as a guide to guide the tip portion 22A into the rear insertion hole 64.

[0037] In the state in which the buckle 30 is attached, the engaging claw 74 of the locking structure 70 engages with the engaging recess 25 of the tip portion 22A of the head strap 20. In addition to the base portion 22B of the head strap 20 being locked by the engaging claw 74 of the locking structure 70, the tip portion 22A is also locked by the protrusion 73, which allows the head strap 20 to be fixed to the buckle 30 more stably, and the fit can be further tightened around the head starting from the portion locked by the protrusion 73 to improve the fit.

[0038] A pair of ribs 49 are located on the inner surface of the bottom wall portion 41 of the base member 40, protruding opposite the pair of engaging claws 74 of the cover member 60 and extending in the front-rear direction Z. When the base end portion 22B of the head strap 20 is inserted through the base insertion hole, the engaging claws 74 engage with the engaging recess 25, and the base end portion 22B is clamped between the engaging claws 74 and the ribs 49, allowing for more stable locking compared to when the ribs 49 are absent.

[0039] An optional through-hole 48, which is roughly square in shape, is formed in the bottom wall portion 41 of the base member 40. Since the through-hole 48 is located opposite the locking mechanism formed by the locked structure 50 and the locking structure 70 in the lateral direction X, for example, when the lock cannot be released when attempting to release the locking mechanism, an operating rod can be inserted into the through-hole 48 to push up the locking projection 72 via the base end portion 22B of the head strap 20 and release the lock.

[0040] Referring to Figures 6(a) and 7(a),(b), in the assembled state of the buckle 30, the rear surface of the locking projection 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 manner with respect to the transverse centerline Q. When the underwater mask 10 is worn, a pulling force is applied to the tip portion 22A of the head strap 20 inserted through the cover insertion hole of the cover member 60 in the direction of arrow K1, and to the base end portion 22B inserted through the base insertion hole of the base member 40 in the direction of arrow K2.

[0041] When worn, the wearer grasps the buckle 30 or the tip portion 22A of the head strap 20 and pulls it backward. As a result, the locking structure 70 has the required flexibility and is biased backward by the elastic portion 75, causing the engaging claw 74 located at its inner end to engage with the engaging recess 25 of the base portion 22B of the head strap 20, and the base portion 22B is squeezed between the engaging claw 74 and the rib 49 of the bottom wall portion 41. This prevents the head strap 20 from moving, and the head strap 20 becomes locked.

[0042] Thus, with the underwater mask 10 according to the present invention, the wearer can easily restrict the movement of the head strap 20 simply by grasping the buckle 30 or the tip portion 22A and moving it backward, resulting in excellent operability.

[0043] As shown in Figure 6(a), the angle α between the imaginary line T, which connects the pivot axis AX of the cover member 60 with respect to the base member 40 and the center point O of the locking surface 83 of the locking portion 51 (the point that equalizes the length dimension of the locking surface 83), and the locking surface 83 in the lateral direction X is 20 to 60°, preferably 40 to 50°.

[0044] When the intersection angle α is less than 20°, in a cross-sectional view, the locking projection 72 will appear more upright than in the illustrated configuration, and the force exerted by the base end portion 22B of the head strap 20 to press the locking projection 72 against the locked portion 51 may cause the cover member 60 to act to separate from the base member 40. On the other hand, when the intersection angle α exceeds 60°, in a cross-sectional view, the locking structure 70 will appear more inclined than in the illustrated configuration, and the engaging claw 74 will bite more firmly into the engaging recess 25, making it difficult for the engaging claw 74 to come out of the engaging recess 25 when adjusting the length of the head strap 20.

[0045] A raised portion 84 is located on the front end 40a side of the locking portion 51 of the base member 40, and is formed to be thicker than the rear end 40b side. This prevents the locking projection 72 from unexpectedly overriding the locking portion 51 outward in the lateral direction X when the buckle 30 is subjected to an external impact, thereby preventing the connection between the cover member 60 and the base member 40 from being released.

[0046] The side portions 71 of the locking structure 70 of the cover member 60 are formed to be relatively thin, with a thickness dimension D1 of 1.0 to 1.5 mm. In this way, the side portions 71 of the locking structure 70 are formed to be relatively thin to the extent that they have the required strength, so that they can bend to follow the movement of the head strap 20 without breaking, and the engagement by the engaging claws 74 can be prevented from being released.

[0047] Referring to Figures 7(b) and 8(a),(b), when adjusting the length of the head strap 20, the wearer grasps the buckle 30 with one hand and presses the pair of operating parts 34 of the cover member 60 in the direction of arrow P1. This causes the pressing projection 34b of the operating part 34 to slide against the pressed projection 47, and the cover member 60 moves outward in the lateral direction X so as to move away from the base member 40. As a result, a gap S1 is formed between the front end of the cover member 60 and the front end of the base member 40, the engagement between the engaging claw 74 and the engaging recess 25 is released, and the base end portion 22B of the head strap 20, which was being held between the engaging claw 74 and the bottom wall portion 41 of the base member 40, becomes free.

[0048] Thus, when the wearer presses the pair of operating parts 34 with one hand, and the wearer grasps the tip portion 22A of the head strap 20 with the other hand and pulls it in the opposite direction of arrow K1, the outer circumference of the head strap 20 becomes smaller when worn, and the tightening force of the head strap 20 is improved. On the other hand, when the wearer moves the tip portion 22A to push it into the buckle 30 in the direction of arrow K1, the outer circumference of the head strap 20 becomes larger, and the tightening force of the head strap 20 decreases.

[0049] After the wearer adjusts the length of the head strap 20 to fit the size of their head, when they release their fingers from the operating part 34, the pressing projection 34b of the operating part 34 slides against the pressed projection 47, causing the cover member 60 to move inward in the lateral direction X so that it approaches the base member 40, returning it to its original state before the pressing operation. In this state, the wearer can grasp the buckle 30 or the tip portion 22A and pull it backward, causing the engaging claw 74 to engage with the engaging recess 25, restricting the movement of the head strap 20 and locking it in place.

[0050] In this way, the wearer can easily and freely change the length of the head strap 20 by pinching and pressing the buckle 30 with one hand while pulling or pushing the tip 22A of the head strap 20 with the other hand, thus offering excellent operability.

[0051] Although not shown in the figures, the buckle 30 may be integrally molded. For example, the rear end 32 of the buckle 30 can be made inseparable, while the middle section 33 and the front end 31 can be integrally molded to be separable. However, as in this embodiment, having the buckle 30 composed of separate parts simplifies the manufacturing process and reduces manufacturing costs compared to integral molding.

[0052] Furthermore, since the buckle 30 is composed of two components, a base member 40 and a cover member 60, it has a relatively small number of parts, which helps to reduce manufacturing costs and makes assembly easy. Also, because the base member 40 and the cover member 60 are separate components, if, for example, the elastic part 75 of the cover member 60 is damaged, only the cover member 60 can be replaced and the base member 40 can be reused, making it economically efficient.

[0053] In this specification, unless otherwise specified, any of the constituent materials of the underwater mask 10 may be any known material commonly used in this type of field without limitation. [Explanation of Symbols]

[0054] 10. Underwater mask 13 Mask body 20 head straps 25 Engagement recess 30 buckles 34 Control section 40 Base member 41 Bottom wall section 42 Side wall sections 43 Front insertion hole 45 Rear insertion hole 49 Ribs 50 Locked structure 60 Cover component 61 Central opening 62 Outer wall 63 Front insertion hole 64 Rear insertion hole 70 Locking structure 71 Both sides 72 Locking protrusion 74 Engaging claws 75 Elastic part 83 Locked surface X horizontal direction Y vertical direction Z front and back direction

Claims

1. A diving mask having vertical, front-back, and lateral directions, comprising a mask body, a head strap connected to the mask body, and a buckle for adjusting the length of the head strap, The buckle is separate from the mask body and has an engaging claw that is spaced apart in the front-rear direction and engages with an engaging recess located on the outer surface of the head strap, and a pair of operating parts that are positioned opposite each other in the up-down direction. By moving the buckle backward, the head strap A swimming mask characterized in that the length adjustment of the head strap is restricted when the engaging claw engages with the engaging recess, and the restriction is released by pressing the operating part.

2. The underwater mask according to claim 1, wherein the buckle comprises a base member and a cover member separate from the base member, the cover member being rotatably attached to the base member and having an operating part, and the cover member moving away from the base member by pressing the operating part.

3. The underwater mask according to claim 2, wherein the cover member has an outer peripheral wall portion having a central opening that opens outward in the lateral direction X, front and rear insertion holes, and a locking structure located within the outer peripheral wall portion, the locking structure is connected to the outer peripheral wall portion via an elastic portion extending from the outer peripheral wall portion and has a pair of side portions that extend laterally so as to be inclined rearward, and a locking projection located between the side portions, and the sharp engaging claws are located at the inner ends of the side portions that are located on the outward side in the lateral direction.

4. The underwater mask according to claim 3, wherein the base member has a bottom wall portion, side wall portions that rise from the bottom wall portion and face each other in the vertical direction Y and extend in the front-rear direction, front-rear insertion holes, and a locking structure that is positioned apart from the bottom wall portion so as to connect the side wall portions, and the locking structure has a locking surface into which the locking projection of the cover member is locked.

5. The underwater mask according to claim 4, wherein a rib is located on the inner surface of the bottom wall portion of the base member, facing the engaging claw of the cover member.

Images