Swimming goggles

Abstract

To provide swimming goggles with a head strap length adjustment mechanism which can easily perform connection operation and length adjustment of a head strap and prevent a locked state of the head strap from being released carelessly even in an attached state and an unattached state.SOLUTION: A length adjustment tool 10 includes a base member 20, a pair of sliders 50, 60 with both end parts 8A, 8B of a head strap 8 connected, respectively, and lock means for regulating movement of the pair of sliders 50, 60 in a state in which the pair of sliders 50, 60 are separated from each other. The movement of both end parts 8A, 8B of the head strap 8 is regulated in a state in which the sliders 50, 60 are locked, and locked states of the sliders 50, 60 and the head strap 8 are released by making the pair of sliders 50, 60 slide in the direction of coming closer to each other.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to swimming goggles.

Background Art

[0002] Conventionally, swimming goggles equipped with a length adjustment means for the head strap are known. For example, Patent Document 1 discloses swimming goggles including a goggle body, a head strap attached to the goggle body, and a length adjustment means consisting of an eight-ring for adjusting the length of the head strap. The head strap has both ends facing each other in the extending direction, and both ends are folded back on both sides of the goggle body and maintained in a folded state via the eight-ring.

[0003] Also, Patent Document 2 discloses swimming goggles provided with a length adjustment means for the head strap in which a plurality of engaging protrusions are arranged at intervals in the extending direction of the head strap, and a plurality of engaging grooves with which the engaging protrusions are engaged for inserting the head strap.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] According to the swimming goggles disclosed in Patent Document 1, connecting the head strap to the figure-eight ring is cumbersome because the head strap must be inserted through three insertion holes. Furthermore, if the wearer is unfamiliar with figure-eight rings, it can be difficult to determine which part of the head strap to insert into the multiple insertion holes and in what order. Additionally, adjusting the length is cumbersome because the part of the head strap inserted into the figure-eight ring must be loosened to some extent before being pulled forward or backward, and it is difficult to perform such length adjustments while wearing the goggles.

[0006] According to the swimming goggles disclosed in Patent Document 2, the length of the head strap can be adjusted in stages by shifting the engagement positions of multiple engagement protrusions and multiple engagement holes. However, the engagement can be easily released simply by pulling the head strap outward, and there is a risk that the connection of the head strap may be unintentionally released whether the swimming goggles are being worn or not.

[0007] The object of the present invention is to provide a swimming goggle that is an improvement over conventional swimming goggles, and is equipped with a head strap length adjustment mechanism that allows for easy connection and length adjustment of the head strap, and prevents the head strap from being unintentionally released when locked, whether the goggle is being worn or not. [Means for solving the problem]

[0008] The present invention relates to the goggle body (5) and the goggle body (5) Head strap attached to the side (8) and the aforementioned head strap (8) Length adjustment tool for adjusting the length (10) Swimming goggles equipped with (1) This applies to the following.

[0009] A swimming goggle (1) comprising a goggle body (5), a head strap (8) connected to the side of the goggle body (5), and a length adjuster (10) for adjusting the length of the head strap (8), The aforementioned length adjuster (10) is the longitudinal direction (Y)having a base member (20) and, in the longitudinal direction (Y) are spaced apart and opposed to each other, and the base member (20) in the longitudinal direction (Y) is slidably attached to, and both ends of the head strap (8) are respectively connected to a pair of sliders( 50、60) and, when the pair of sliders (50、60) are separated from each other, locking means for restricting the movement of the pair of sliders (50、60) are provided, said a pair slider (50、60) is locked, the movement of both ends (8) of the head strap (8A, 8B) is restricted, and by sliding the pair of sliders (50、60) towards each other, the locked state between the a pair slider (50、60) and the head strap (8) is released 、 The pair of sliders (50, 60) each have an operating section, and the operating section has a shape that can be tactilely recognized by the wearer. The pair of sliders (50, 60) are frame-shaped and have a pair of inner ends (52, 62), The aforementioned tactilely recognizable shape is formed by a pair of operating protrusions (58, 68) in the thickness direction (Z) of the operating part. The pair of inner ends (52, 62) have the pair of operating protrusions (58, 68) and the pair of trapezoidal locking parts (59, 69), The base member (20) has side wall portions (21, 22) that extend in the longitudinal direction (Y) and face each other in the width direction (X), and a first support frame (30) and a second support frame (40) arranged between the side wall portions (21, 22). The base member (20) has a central wall portion (25) that is sandwiched between the pair of sliders (50, 60), The first support frame (30) and the second support frame (40) are rectangular in shape and each has a pair of outer portions (31, 41) extending in the width direction X so as to connect the outer edges of the side wall portions (21, 22), and a pair of inner portions (32, 42) extending in the width direction (X) and positioned opposite the pair of outer portions (31, 41) in the longitudinal direction Y. The pair of locking portions (59, 69) are sandwiched between the central wall portion (25) and the pair of inner portions (32, 42). which is characterized in that

[0010] The swimming goggles according to the present invention include the following embodiments. (1) The pair of locking parts (59, 69) have a pair of locking ends (59a, 69a), The central wall portion (25) has a pair of protrusions (25a, 25b), When the pair of sliders (50, 60) are locked, the pair of locking ends (59a, 69a) are positioned to overcome and lock over the pair of projections (25a, 25b). When the lock state of the pair of sliders (50, 60) is released, the pair of locking ends (59a, 69a) are in contact with the inner surface of the central wall portion (25). (2) The pair of sliders (50、60) have locking ends (20) that are locked to the base member a pair and (59a, 69a) have, The swimming goggles (1) In the attached state, a pair Locking end (59a, 69a) It will not be exposed to the outside. [Effects of the Invention]

[0011] In swimming goggles according to one or more embodiments of the present invention, when the slider is locked, the movement of both ends of the head strap is restricted, and the locked state of the slider and the head strap is released by sliding the pair of sliders in a direction that separates them from each other. As a result, the length of the head strap can be easily adjusted with a single touch, and the locked state of the slider and head strap will not be unintentionally released whether the goggles are being worn or not. [Brief explanation of the drawing]

[0012] The drawings illustrate specific embodiments of the present invention relating to this disclosure, including not only essential components of the invention but also optional and preferred embodiments.

[0013] [Figure 1] A perspective view of swimming goggles according to one embodiment of the present invention. [Figure 2] (A) Rear plan view of the length adjuster. (B) Front plan view of the length adjuster. (C) Side view of the length adjuster. [Figure 3] Exploded perspective view of the length adjustment device. [Figure 4] (A) Rear plan view of the base member. (B) Front plan view of the base member. [Figure 5] (A) Rear plan view of a pair of sliders. (B) Front plan view of a pair of sliders. (C) Side view of a pair of sliders. [Figure 6] (A) Rear plan view of the length adjuster in the unlocked state of the slider. (B) Cross-sectional view along the line VI(B)-VI(B) in Figure 6(A). [Figure 7] (A) Rear plan view of the length adjuster in the locked position of the slider. (B) Cross-sectional view along the line VII(B)-VII(B) in Figure 7(A). [Figure 8] (A) to (D) Diagrams showing the locking mechanism of the length adjuster in an example of another embodiment. [Figure 9] (A), (B) Diagrams showing the guide means of the length adjuster in an example of another embodiment. [Modes for carrying out the invention]

[0014] Referring to the attached drawings, the details of the swimming goggles 1 according to the present invention are as follows. For the sake of clarity, in each figure, the head strap 8 is depicted as being light black in color.

[0015] As shown in Figures 1 to 3, the swimming goggles (hereinafter referred to as goggles) 1 of the present invention include a goggle body 5 having a pair of eye cups 3 with lenses 2 on the front and a pad member 4 made of a soft material located behind the eye cups 3, a head strap 8 connected to both sides of the goggle body 5 and a length adjuster (length adjustment means) 10 for adjusting the length of the head strap 8.

[0016] Through holes 6 extending in the vertical direction are formed on both sides of the goggle body 5. The head strap 8 has first and second ends 8A, 8B in the extending direction and an annular portion 8C located between them.

[0017] Specifically, the first and second ends (both ends) 8A and 8B are inserted through the insertion hole 6 from the outer side to the inner side of the goggle body 5 and folded back, and the first and second ends 8A and 8B are connected to the length adjuster 10, so that the head strap 8 has two annular portions 8C that are wrapped around the wearer's head.

[0018] Here, the first and second ends 8A and 8B of the head strap 8 include the portion wrapped around the guide shafts 54 and 64 of the pair of sliders 50 and 60 described later, and the tip portion extending therefrom, while the annular portion 8C consists of the remaining portion other than the first and second ends 8A and 8B.

[0019] The head strap 8 is a soft material with rubber elasticity and can be molded from an elastic material such as silicone rubber or thermoplastic elastomer.

[0020] The length adjuster 10 has an inner surface (front) 10a facing the wearer's head, an outer surface (rear) 10b on the opposite side, and a longitudinal center line P that bisects the longitudinal Y, width (up and down) X, thickness (front and back) Z, and the longitudinal Y dimension. The length adjuster 10 has a basic form that is symmetrical with respect to the longitudinal center line P.

[0021] The length adjuster 10 comprises a base member 20 and a pair of sliders 50, 60 slidably mounted on the base member 20 in the longitudinal direction Y. The first and second ends 8A, 8B of the head strap 10 are detachably attached to the pair of sliders 50, 60. The pair of sliders 50, 60 are separate from the base member 20 and are detachably mounted to the base member 20. Therefore, only the pair of sliders 50, 60 or the base member 20 can be replaced as needed. The pair of sliders 50, 60 may be inseparably mounted from the base member 20, as long as they are not integrally molded with the base member 20.

[0022] The base member 20 and the pair of sliders 50 and 60 that constitute the length adjustment device 10 are made of rigid materials and can be molded from rigid resins such as polycarbonate, polyamide, or ABS resin.

[0023] <Base component> Referring to Figures 4(A) and 4(B), the base member 20 has side wall portions 21 and 22 that extend in the longitudinal direction Y and face each other in the width direction X, and first and second support frames 30 and 40 arranged between the side wall portions 21 and 22.

[0024] The side walls 21 and 22 have a shape that is slightly convex towards the rear in a plan view, and their central portions have a concave shape in a front view. The concave shape of the central portions of the side walls 21 and 22 allows these central portions to function as finger rests for the wearer to place the fingers of one hand on when holding down the base member 20 while adjusting the length of the head strap 8.

[0025] The first and second support frames 30 and 40 are rectangular in shape and each has an outer portion 31 and 41 extending in the width direction X to connect the outer edges of the side wall portions 21 and 22, an inner portion 32 and 42 extending in the width direction X and positioned opposite the outer portion 31 and 41 in the longitudinal direction Y, and side portions 33 and 43 extending in the longitudinal direction Y to connect the outer portion 31 and 41 and the inner portion 32 and 42.

[0026] The outer portions 31 and 41 of the first and second support frames 30 and 40 have a shape that is slightly curved towards the vertical center line P, and the outer surfaces of the inner portions 32 and 42 are provided with ribs 34 and 44 that extend in the width direction X.

[0027] The first and second support frames 30 and 40 are integrally molded with the side wall portions 21 and 22, and are located on the front side of the side wall portions 21 and 22, forming a part of the inner surface 10a of the length adjuster 10. A pair of guide holes 23 and 24 are formed in the portions of the side wall portions 21 and 22 that extend outward from the first and second support frames 30 and 40, and are positioned opposite each other in the width direction X. The guide holes 23 and 24 have a substantially elliptical shape that extends in the longitudinal direction Y.

[0028] The base member 20 has a central wall portion 25 that extends in the width direction X to connect the central portions of the side wall portions 21 and 22. The central wall portion 25 is located between the inner portions 32 and 42 of the first and second support frames 30 and 40 in the longitudinal direction Y, and is located opposite and spaced apart from the first and second support frames 30 and 40 in the thickness direction Z, forming a part of the rear surface 10b of the length adjuster 10. An insertion portion (insertion space) 27 extending in the longitudinal direction Y is formed between the inner portions 32 and 42 of the first and second frames 30 and 40 and the central wall portion 25 in the thickness direction Z. In addition, projections 25a and 25b are located on both side edges of the central wall portion 25 that extend in the width direction X on the front side (see Figure 6(B)).

[0029] <Slider> Referring to Figures 5(A) to (C), the pair of sliders 50, 60 are frame-shaped and each has inner and outer ends 51, 52, 61, 62 that are opposite to each other in the width direction X, side portions 53, 63 that extend in the width direction X between the inner and outer ends 51, 52, 61, 62, guide shafts 54, 64 that are located between the inner and outer ends 51, 52, 61, 62 and extend in the width direction X, around which the head strap 8 is wrapped, first openings 55, 65 located between the inner ends 52, 62 and the guide shafts 54, 64, and second openings 56, 66 located between the outer ends 51, 61 and the guide shafts 54, 64.

[0030] The guide shafts 54 and 64 are located on the outer surfaces of both sides 53 and 63, with a portion of them protruding rearward from the outer surfaces of both sides 53 and 63. In addition, projections 57 and 67 are located on the outer surfaces of the parts of both sides 53 and 63 that overlap with both ends of the guide shafts 54 and 64, and are inserted into the guide holes 23 and 24 of the base member 20.

[0031] The inner ends 52, 62 have operating projections 58, 68 and substantially trapezoidal locking portions 59, 69 extending inward in the longitudinal direction Y from the operating projections 58, 68. The outer ends 51, 61 have a base end portion and curved outer edge portions 51a, 61a extending outward in the width direction X from the base end portion and inclined toward the outer surface from the inner side.

[0032] Display elements 71 and 72, each bearing the English word "LOCK," are positioned on the outer surfaces of the locking portions 59 and 69. As shown in Figures 6(A) and 7(A), when the sliders 50 and 60 are locked, the entire display elements 71 and 72 are exposed to the outside, whereas when the sliders 50 and 60 are unlocked, the locking portions 59 and 69 overlap with the central wall portion 25, and only a portion of the display elements 71 and 72 are exposed to the outside. Therefore, by visually inspecting the display elements 71 and 72, it is possible to visually confirm whether the sliders 50 and 60 are locked or not. Note that the display elements 71 and 72 are optional, and as long as they are visible, they may be known display elements such as numbers, patterns, or colors instead of English letters.

[0033] With the length adjustment device 10 assembled, the pair of sliders 50 and 60 are positioned in the arrangement spaces S1 and S2 defined between the first and second support frames 30 and 40 and the side wall portions 21 and 22, respectively.

[0034] In this configuration, the locking portions 59 and 69 of the sliders 50 and 60 are inserted into the insertion portion 27 between the inner end portions 52 and 62 and the central wall portion 25 in the thickness direction Z, and the side portions 53 and 63 are in contact with the side wall portions 21 and 22 and the side portions 33 and 43 of the first and second support frames 30, 0, and 40. In addition, the projections 57 and 67 of the side portions 53 and 63 of the sliders 50 and 60 are inserted through the guide holes 23 and 24 of the side wall portions 21 and 22.

[0035] Referring to Figures 4(B) and 5(A), the separation dimension W1 in the width direction X between the side walls 21 and 22 of the base member 20 and the width dimension W2 of the pair of sliders 50 and 60 (distance between the outer edges of the side walls 53 and 63 in the width direction X) are approximately the same. When the pair of sliders 50 and 60 are attached to the base member 20, the side walls 53 and 63 of the pair of sliders 50 and 60 are slidably in contact with the side walls 21 and 22 of the base member 20 in the longitudinal direction Y. The pair of sliders 50 and 60 have a pair of protrusions 57 and 67 that are positioned opposite each other in the width direction X, and the width dimension W3 of the portion where these protrusions are located is larger than the width dimension W2.

[0036] Referring again to Figure 3, when attaching the pair of sliders 50 and 60 to the base member 20, first, the sliders 50 and 60 are placed in the arrangement spaces S1 and S2 between the side wall portions 21 and 22 with the inner surfaces of the sliders 50 and 60 facing the outer surfaces of the base member 20. At this time, as previously described, the width dimension W3 of the portion where the pair of projections 57 and 67 are located is larger than the width dimension W2 of the portion where the side portions 53 and 63 are located and the separation dimension W1 between the side wall portions 21 and 22. Therefore, it is not possible to slide the side portions of the sliders 50 and 60 in parallel with the side wall portions 21 and 22. For example, the projections 57 and 67 are inserted into the guide holes 23 and 24 with one side portion of the slider 50 and 60 at an angle to the opposite side wall portion 21.

[0037] Next, by inserting the projections 57 and 67 on the other side of the sliders 50 and 60 into the guide holes 57 and 67 of the other side wall portion 22, both sides of the sliders 50 and 60 come into contact with the side wall portions 21 and 22, and are stably positioned in the placement spaces S1 and S2.

[0038] The sliders 50 and 60 can slide inward in the longitudinal direction Y from a state where they are positioned outward in the longitudinal direction Y of the base member 20 (with the projections 57 and 67 on both sides 53 and 63 positioned at the outer ends of the guide holes 23 and 24) toward the vertical center line P. When the sliders 50 and 60 are positioned inward in the longitudinal direction Y (with the projections 57 and 67 on both sides 53 and 63 positioned at the inner ends of the guide holes 23 and 24), the locking portions 59 and 69 overlap with the central wall portion 25 in the thickness direction Z, and the locking ends 59a and 69a are in contact with the inner surface of the central wall portion 25.

[0039] Because the base member 20 has a shape that is curved backward, when the sliders 50 and 60 are placed in the arrangement spaces S1 and S2 of the base member 20, the locking portions 59 and 69 are raised by the inner portions 32 and 42 of the first and second support frames 30 and 40, and the sliders are arranged in such a manner that they extend diagonally with respect to the vertical center line P. As a result, the locking ends 59a and 69a of the locking portions 59 and 69 are pressed against the central wall portion 25.

[0040] Note that the guide means provided by the guide holes 23, 24 and the projections 57, 67 are optional and can be omitted. However, it can be said that the provision of this guide means allows the sliders 50, 60 to slide stably in the longitudinal direction Y relative to the base member 20.

[0041] Referring to Figures 6(A) and (B), in the unlocked state where the sliders 50 and 60 are close to each other, the locking ends 59a and 69a are in contact with the inner surface of the central wall portion 25. In this state, the width dimensions (dimensions in the longitudinal direction Y) R1 and R2 of the through holes formed by the separation between the guide shafts 54 and 64 of the sliders 50 and 60 and the ribs 34 and 44 of the base member 20 are relatively wide, and the first and second ends 8A and 8B of the head strap 8 can move freely through the through holes.

[0042] When the wearer attaches the length adjustment device 10 to the head strap 8 connected to the goggle body 5, with the sliders 50 and 60 in an unlocked state close together, the wearer inserts the first and second ends 8A and 8B of the head strap 8 into the first openings 55 and 65 of the sliders 50 and 60 from the inner side of the length adjustment device 10, and then inserts them through the guide shafts 54 and 64 from rear to front into the second openings 56 and 66.

[0043] When adjusting the length of the head strap 8 using the length adjustment tool 10, first, with the goggles 1 either attached or not attached, the fingers of one hand are placed on the finger rest portion, which is the central part of the side wall portions 21, 22 of the base member 20, while the first and second ends 8A, 8B and / or the annular portion 8C of the head strap 8 are pulled with the other hand, thereby adjusting the inner circumference of the head strap 8 to fit the size of the head.

[0044] Referring to Figures 7(A) and 7(B), after adjusting the length of the head strap 8, when the inner circumference of the head strap 8 fits the size of the head H, the wearer, while wearing the strap, slides the sliders 50 and 60 apart from each other with one or both hands, causing the locking ends 59a and 69a to slide against the projections 25a and 25b and move toward the vertical center line P, stopping in a state where they have moved over them.

[0045] As a result, the locking portions 59 and 69 are compressed in the thickness direction Z between the inner portions 32 and 42 of the first and second support frames 30 and 40 and the protrusions 25a and 25b of the central wall portion 25, restricting the movement of the sliders 50 and 60 and locking them in place.

[0046] As sliders 50 and 60 slide in directions away from each other, guide shafts 54 and 64 move closer to ribs 34 and 44, the width dimensions R1 and R2 of the insertion holes become relatively narrow, and the first and second ends 8A and 8B of the head strap 8 are pressed between them, restricting the movement of the head strap 8. The head strap 8 is thus locked, and even if the wearer pulls on the ends of the first and second ends 8A and 8B, the locked state of the head strap 8 will not be released, and the inner circumference of the head strap 8 will not be changed.

[0047] As described above, with the goggle length adjustment device 10 according to the present invention, the wearer can easily operate the unlocked and locked states of the sliders 50 and 60 and the head strap 8 with a single touch by moving the sliders 50 and 60 closer to or further apart from each other.

[0048] Thus, since the locked and unlocked states of sliders 50 and 60 can be repeatedly switched with a single touch, even when making multiple fine adjustments to the length of the head strap, there is no need to repeatedly reinsert the head strap 8 into the insertion hole, making length adjustment easier compared to conventional goggles.

[0049] Furthermore, if sliders 50 and 60 are locked, the inner circumference of the ring portion 8C of the head strap 8 will not change unintentionally even when carrying the goggles 1, and the inner circumference will not change even if the goggles 1 are repeatedly worn, so the fit set by the initial length adjustment can be maintained.

[0050] The locking ends 59a and 69a of the locking portions 59 and 69 of the sliders 50 and 60 overlap with the central wall portion 25 in the thickness direction Z, and are therefore not exposed to the outside. Consequently, even if the length adjuster 10 is subjected to an external impact while installed, the locking ends 59a and 69a will not be directly hit and damaged, preventing the sliders 50 and 60 from being unintentionally released.

[0051] Furthermore, even if the wearer accidentally puts on the goggles 1 with the sliders 50 and 60 unlocked, the head strap 8 is wrapped around the wearer's head H and tightened, causing the sliders 50 and 60 to move away from each other and lock naturally. As a result, the goggles 1 will not fall off and can be worn safely.

[0052] In the length adjustment device 10, there are only two insertion holes through which the first and second ends 8A and 8B of the head strap 8 are inserted. Therefore, compared to conventional length adjustment devices that have three insertion holes, the user can easily visually understand how to use the length adjustment device 10, even when using it for the first time.

[0053] Furthermore, when adjusting the length of the head strap 8, pulling the ends of the first and second ends 8A and 8B reduces the inner circumference of the annular portion 8C of the head strap 8, thereby tightening it. Conversely, pulling the annular portion 8C away from the length adjustment tool 10 increases the inner circumference of the annular portion 8C, thereby loosening it. In this way, the length of the head strap 8 can be easily adjusted by tightening and loosening it, resulting in excellent operability.

[0054] In the illustrated example, the operating parts for moving the sliders 50 and 60 are formed by operating protrusions 58 and 68 that project backward, allowing the wearer to easily grasp the operating parts visually. Furthermore, while the wearer cannot directly see the length adjuster 10 which is located opposite the back of the head H, they can easily grasp the position of the operating parts by touching the protruding operating protrusions 58 and 68 with their fingertips and operate the sliders 50 and 60.

[0055] Thus, in order for the wearer to recognize the operating part not only visually but also tactilely while wearing the device, it is preferable that the operating part has external features that can be recognized tactilely, such as protrusions, grooves, or uneven surfaces.

[0056] However, the operating parts of the sliders 50 and 60 may be flat insofar as the wearer places their fingers on them, and may be located on both sides 53 and 63 or the outer ends 51 and 61 of the sliders 50 and 60, rather than on the inner ends 52 and 62. Furthermore, even in the illustrated example, when moving the sliders 50 and 60 in the longitudinal direction Y, the operating parts may be operated by placing fingers on the outer ends 51 and 61 instead of using the operating projections 58 and 69. Thus, if necessary, when moving the sliders 50 and 60 in the longitudinal direction Y, parts other than the operating projections 58 and 68 may be used as the operating parts of the sliders 50 and 60.

[0057] Figures 8(A) to 8(D) show the locking mechanisms for sliders 50 and 60 in an example of another embodiment. Since the configuration of sliders 50 and 60 is the same, only the locking mechanism for slider 50 will be described below, and the description of the locking mechanism for slider 60 will be omitted.

[0058] In the example shown in Figure 8(A), as the slider 50 moves toward the vertical center line P, the locking end 59a of the locking part 59 overcomes the projection (locked part) 25a of the central wall 25 and stops in a locked state, thus providing a more stable lock.

[0059] In the illustrated example in Figure 8(B), the surface of the locking portion 59 facing the central wall portion 25 has an uneven surface, and the projection 25a of the central wall portion 25 is locked into the recess adjacent to the locking end 59a.

[0060] In the illustrated example in Figure 8(C), both sides of the locking portion 59 are corrugated, and the opposing surfaces of the central wall portion 25 that clamps it and the inner portion 32 of the first frame 30 are also corrugated, and the locking is achieved when their irregularities are engaged.

[0061] In the example shown in Figure 8(D), the locking portion 59 is rectangular in shape, and the distance between the central wall portion 25 and the inner portion 32 gradually narrows toward the vertical center line P. As a result, the slider 50 is strongly clamped and locked as it moves toward the vertical center line P.

[0062] In addition to the illustrated examples, the means for engaging the locking portions 59, 69 of the sliders 50, 60 with the base member 20 may be a fastener consisting of a mating projection and a mating recess that are detachably mated with each other. Furthermore, as shown in the illustration, the locking ends 59a, 69a of the engaging portions 59, 69 can have various shapes such as projections, flat portions, and uneven surfaces, as long as they are locked to the base member 20. Thus, the locking means for the sliders 50, 60 can be of various forms as long as the movement of the sliders 50, 60 is restricted, and is not limited to the illustrated examples.

[0063] Figures 9(A) and 9(B) show the guide means for sliders 50 and 60 in an example of another embodiment.

[0064] In the example shown in Figure 9(A), the guide holes 23 and 24 are elliptical in shape, extending in the longitudinal direction Y, and gradually narrowing towards the longitudinal centerline P. As a result, the projections 57 and 67 of the sliders 50 and 60 are locked when they move to the inner ends of the guide holes 23 and 24.

[0065] In the illustrated example in Figure 9(B), the guide holes 23 and 24 have a shape formed by two arcs aligned in the longitudinal direction Y. By moving the sliders 50 and 60 toward the vertical center line P with a relatively strong force, the projections 57 and 67 move through the constricted portion of the guide holes 23 and 24 to their inner ends while undergoing elastic deformation. The shape of the guide holes 23 and 24 restricts the movement of the projections 57 and 67.

[0066] In Figures 9(A) and (B), the guide means not only has the function of guiding the movement of the slides 50 and 60, but also the function of restricting the movement of the protrusions 57 and 67. Therefore, in combination with the locking means provided by the locking ends 59a and 69a of the sliders 50 and 60, the sliders 50 and 60 can be locked more stably.

[0067] The length adjustment device 10 according to the present invention can be used not only for swimming goggles but also for adjusting the length of the headband of a swimming mask. Furthermore, unless otherwise specified, various known materials commonly used in this field can be used without limitation for each component material constituting the swimming goggles 1 according to the present invention. [Explanation of Symbols]

[0068] 1. Swimming goggles (goggles) 5. Goggle body 8 head straps 8A First end of the head strap 8B Head strap second end 10 Length adjuster 20 Base members 50 Slider 58 Operation protrusion 59a Locking end 60 Slider 68 Operation protrusion 69a Locking end

Claims

1. A swimming goggle (1) comprising a goggle body (5), a head strap (8) connected to the side of the goggle body (5), and a length adjuster (10) for adjusting the length of the head strap (8), The length adjuster (10) has a longitudinal direction (Y) and comprises a base member (20), a pair of sliders (50, 60) positioned spaced apart from each other in the longitudinal direction (Y) and slidably mounted on the base member (20) in the longitudinal direction (Y), with both ends of the head strap (8) connected to each other, and a locking means for restricting the movement of the pair of sliders (50, 60) when they are spaced apart from each other. When the pair of sliders (50, 60) are locked, the movement of both ends (8A, 8B) of the head strap (8) is restricted, and by sliding the pair of sliders (50, 60) toward each other, the locked state between the pair of sliders (50, 60) and the head strap (8) is released. The pair of sliders (50, 60) each have an operating section, and the operating section has a shape that can be tactilely recognized by the wearer. The pair of sliders (50, 60) are frame-shaped and have a pair of inner ends (52, 62), The aforementioned tactilely recognizable shape is formed by a pair of operating protrusions (58, 68) in the thickness direction (Z) of the operating part. The pair of inner ends (52, 62) have the pair of operating protrusions (58, 68) and the pair of substantially trapezoidal locking parts (59, 69), The base member (20) has side wall portions (21, 22) that extend in the longitudinal direction (Y) and face each other in the width direction (X), and a first support frame (30) and a second support frame (40) arranged between the side wall portions (21, 22). The base member (20) has a central wall portion (25) that is sandwiched between the pair of sliders (50, 60), The first support frame (30) and the second support frame (40) are rectangular in shape and each has a pair of outer portions (31, 41) extending in the width direction X so as to connect the outer edges of the side wall portions (21, 22), and a pair of inner portions (32, 42) extending in the width direction (X) and positioned opposite the pair of outer portions (31, 41) in the longitudinal direction Y. The pair of locking portions (59, 69) are sandwiched between the central wall portion (25) and the pair of inner portions (32, 42). Swimming goggles characterized by the following features.

2. The pair of locking parts (59, 69) have a pair of locking ends (59a, 69a), The central wall portion (25) has a pair of protrusions (25a, 25b), When the pair of sliders (50, 60) are locked, the pair of locking ends (59a, 69a) are positioned to overcome and lock over the pair of projections (25a, 25b). The swimming goggles according to claim 1, wherein when the lock state of the pair of sliders (50, 60) is released, the pair of locking ends (59a, 69a) are in contact with the inner surface of the central wall portion (25).

3. The pair of sliders (50, 60) each have a pair of locking ends (59a, 69a) that are locked to the base member (20), The swimming goggles according to claim 1 or 2, wherein when the swimming goggles (1) are worn, the pair of locking ends (59a, 69a) are not exposed to the outside.

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