footwear

Abstract

To improve the fit of the footwear while suppressing the stretching of the tongue wing. [Solution] The footwear comprises an upper having an insertion opening into which the foot is inserted, a front opening extending forward from the insertion opening, and a bottom opening formed opposite to the insertion opening; a tongue wing 5 having a tongue 51 provided on the inside of the upper and covering at least a part of the front opening, and a wing portion 52 extending from the tongue 51 to one side along the width direction of the foot; and a sole covering the bottom opening, wherein the wing portion 52 is formed of a layered structure having a first layer 531 and a second layer 532 disposed below the first layer 531, the first layer 531 is less elastic than the second layer 532, and the length of the first layer 531 from one end to the other is longer than the length of the straight line connecting the one end and the other along the width direction of the foot.

Description

Technical Field

[0001] This disclosure relates to footwear.

Background Art

[0002] The footwear disclosed in Patent Document 1 includes an upper that covers the instep side of the foot, a sole that covers the bottom side of the foot, and a tongue wing provided inside the upper. The upper has an opening called an entrance through which the foot is inserted into the area surrounded by the upper and the sole. The upper has a throat, which is an opening formed in a shape where the edge of the entrance extends toward the toe side. The tongue wing has a tongue that closes the throat from the inside of the upper and wings (flap portions) that extend from the tongue along the foot width direction to the inner foot side and the outer foot side, respectively. The respective tips of the flap portions are joined to the footwear.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The tongue wing provided in the above - mentioned footwear covers the instep side of the foot of the wearer wearing the footwear with the tongue and the wings. However, although the tongue that covers the throat is joined to the footwear via the wings and an improvement in the fit of the footwear is intended, the tongue wing may extend with the use of the footwear.

[0005] This disclosure has been made in view of the above, and an object thereof is to suppress the extension of the tongue wing while improving the fit of the footwear.

Means for Solving the Problems

[0006] To solve the above-mentioned problems and achieve the objective, the footwear according to the present disclosure comprises an upper having an insertion opening into which a foot is inserted, a front opening extending forward from the insertion opening, and a bottom opening formed opposite to the insertion opening; a tongue wing having a tongue provided on the inside of the upper that closes at least a part of the front opening, and a wing portion extending from the tongue to one side along the width direction of the foot; and a sole that covers the bottom opening, wherein the wing portion is formed of a layered structure having a first layer and a second layer disposed below the first layer, the first layer being less elastic than the second layer, and the length of the first layer from one end on the tongue side to the other end on the opposite side of the tongue side is longer than the length of the straight line connecting the one end and the other end along the width direction of the foot. [Effects of the Invention]

[0007] The footwear relating to this disclosure can improve the fit of the footwear while suppressing the stretching of the tongue wing. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a perspective view of footwear according to Embodiment 1. [Figure 2] Figure 2 is a plan view of footwear according to Embodiment 1. [Figure 3] Figure 3 is a diagram of the tongue wing. [Figure 4] Figure 4 is a cross-sectional view of footwear cut along the line IV-IV shown in Figure 2. [Figure 5] Figure 5 is a plan view of the insole, showing the part where the tip of the first wing section is joined. [Figure 6] Figure 6 is an unfolded view of the tongue wing according to the first modified example. [Figure 7] Figure 7 is an unfolded view of the tongue wing according to the second modified example. [Figure 8] Figure 8 is an unfolded view of the tongue wing according to the third modified example. [Figure 9] Figure 9 is an unfolded view of the tongue wing according to the fourth modified example. [Figure 10] Figure 10 is an unfolded view of the tongue wing according to the fifth modified example. [Modes for carrying out the invention]

[0009] Embodiments of footwear according to this disclosure will be described in detail below with reference to the drawings. However, this invention is not limited to these embodiments. In the following description, the same parts are denoted by the same reference numerals, and redundant descriptions are omitted.

[0010] Figure 1 is a perspective view of footwear according to Embodiment 1 of this disclosure. Figure 2 is a plan view of footwear according to Embodiment 1. Each figure, including Figure 1, shows only the left footwear 1. Since footwear 1 has a symmetrical structure for the left and right feet, this embodiment will only describe the left footwear 1, and the description of the right footwear 1 will be omitted. In the following description, the toe side of the wearer's foot of footwear 1 will be considered the front, and the heel side will be considered the rear. In a plan view of footwear 1, the direction perpendicular to the front-to-back direction will be considered the foot width direction.

[0011] Furthermore, the midline side of the foot in its anatomically correct position is called the medial side, and the side of the foot opposite the midline in its anatomically correct position is called the lateral side. In other words, the side closer to the midline in its anatomically correct position is called the medial side, and the side further from the midline in its anatomically correct position is called the lateral side. Also, unless otherwise specified, the vertical direction refers to the direction perpendicular to both the anterior-posterior direction and the width direction of the foot.

[0012] Footwear 1 comprises an upper 2, an insole 3, an outsole 4, and a tongue wing 5. The upper 2 covers the top surface of the outsole 4. A space for the wearer's foot is provided between the upper 2 and the outsole 4.

[0013] The upper 2 is formed with an insertion opening 21 into which the wearer's foot is inserted, a front opening 22 extending forward from the insertion opening 21, and a bottom opening 23 formed opposite to the insertion opening 21. The upper 2 is fixed to the sole 4 by stitching, welding, adhesion or a combination thereof.

[0014] A plurality of eyelet holes 24 are formed in the upper 2 side by side in the front-rear direction along the edge of the front opening 22. A shoelace (not shown) formed in a string shape is passed through the eyelet holes 24. By pulling the shoelace passed through the eyelet holes 24, the width of the front opening 22 can be narrowed and the upper 2 can be made to closely adhere to the wearer's foot.

[0015] The midsole 3 is joined to the upper 2. The midsole 3 closes the bottom opening 23 formed in the upper 2. Note that the footwear 1 may not be provided with the midsole 3. In this case, the bottom opening 23 is closed by, for example, the sole 4.

[0016] The sole 4 is located below the upper 2. The sole 4 supports the wearer's foot from the sole side. The sole 4 is a member that contacts the ground. The sole 4 is formed of a cushioning material to absorb the impact applied to the foot during walking and running.

[0017] The tongue wing 5 is provided inside the upper 2. FIG. 3 is an exploded view of the tongue wing. The tongue wing 5 includes a tongue 51 and a wing portion 52. The tongue 51 closes at least a part of the front opening 22 formed in the upper 2 as shown in FIGS. 1 and 2. <0​​​​​​Figure 4 is a cross-sectional view of the footwear cut along the line IV-IV shown in Figure 2. When the tongue wing 5 is provided on the inside of the upper 2, the first wing portion 53 and the second wing portion 54 are provided so as to follow the inner surface of the upper 2. The tips of the first wing portion 53 and the second wing portion 54 are joined at a position close to the sole 4. The tongue wing 5 provided in this manner covers the top of the wearer's foot with the tongue 51 and the wing portion 52. The joining positions of the tips of the first wing portion 53 and the second wing portion 54 will be explained in detail later.

[0020] Returning to Figure 3, the first blade portion 53 is composed of multiple layers. For example, the first blade portion 53 has a first layer 531 and a second layer 532 placed on top of the first layer 531.

[0021] The first layer 531 and the second layer 532 have different widths along the length of the foot. Specifically, the width of the first layer 531 is narrower than the width of the second layer 532. The width of the first layer 531 along the length of the foot is the distance between the ends of the first layer 531 along the length of the foot. The width of the first layer 531 along the side length is narrower than the width of the second layer 532 across the entire width of the foot. Furthermore, the width of the second layer 532, which is formed with a wider width, is the width of the entire first wing portion 53 along the length of the foot. Note that either the first layer 531 or the second layer 532 may be provided on the side facing the upper 2. As will be described later, the second layer 532 is more elastic than the first layer 531 and fits more easily according to the shape of the wearer's foot, so it is preferable that the second layer 532 be provided on the side facing the wearer's foot.

[0022] The first layer 531 and the second layer 532 have different elasticity properties. Specifically, the first layer 531 is made of a material with less elasticity than the second layer 532.

[0023] A plurality of the first layers 531 are formed. In the example shown in FIG. 3, two first layers 531 are formed in the toe length direction. Here, a direct connection line is defined that connects one end portion 531a on the tongue 51 side of the first layer 531 and the other end portion 531b on the side opposite to the tongue 51 side along the toe width direction. The direct connection line is indicated by a two-dot chain line in the drawing. The length of the first layer 531 from the one end portion 531a to the other end portion 531b is longer than the length L1 of the direct connection line.

[0024] More specifically, among the two first layers 531, the first layer 531 formed in the front has a protruding portion 531c that protrudes forward of the direct connection line. Also, among the two first layers 531, the first layer 531 formed in the rear has a protruding portion 531c that protrudes rearward of the direct connection line.

[0025] In the first layer 531, each of the portion from the one end portion 531a to the protruding portion 531c and the portion from the protruding portion 531c to the other end portion 531b is formed linearly. The protruding portion 531c is a corner portion where portions formed as straight lines having different extending directions are connected.

[0026] When the length from the one end portion 531a to the protruding portion 531c is L2 and the length from the protruding portion 531c to the other end portion 531b is L3, the relationship L1 < L2 + L3 holds. That is, as described above, the length (L2 + L3) of the first layer 531 from the one end portion 531a to the other end portion 53,b is longer than the length L1 of the direct connection line.

[0027] Also, when the angle between the straight line forming the first layer 531 and the direct connection line is α, it is preferable that the relationship 5° ≤ α ≤ 45° holds.

[0028] The tip of the first blade portion 53 on the side opposite to the tongue 51 is joined and fixed to the midsole 3. FIG. 5 is a plan view of the midsole and shows the portion to which the tip of the first blade portion is joined. The midsole 3 closes the bottom surface opening 23 formed in the upper 2, and the position of the outer edge of the midsole 3 coincides with the position of the bottom surface opening 23.

[0029] The joining region 31 to which the tip of the first wing portion 53 is joined is located inside the outer edge of the insole 3. More specifically, it is preferable that the distance between the outer edge of the insole 3 and the joining region 31 is 1 mm or more and 20 mm or less. The joining region 31 is the region to which the tip of the first wing portion 53 is joined. Therefore, if the distance between the joined tip of the first wing portion 53 and the outer edge of the insole 3 is A, it can be said that it is preferable that 1 mm ≤ A ≤ 20 mm. If the footwear 1 does not have an insole 3, the tip of the first wing portion 53 can be fixed to an insole or sole 4 (not shown in the figure).

[0030] The area to which the tip of the first wing portion 53 is joined, that is, the area of ​​the joining region 31, is the area in the foot length direction where at least one of the metatarsal bones, medial cuneiform bone, and navicular bone of the foot is inserted into the upper.

[0031] The second wing portion 54 is formed as a single layer using the same material as the second layer 532 of the first wing portion 53. However, similar to the first wing portion 53, the second wing portion 54 may be formed with multiple layers. The tip of the second wing portion 54 is joined to the upper 2. The position where the tip of the second wing portion 54 is joined is close to the insole 3.

[0032] In the footwear 1 described above, the top of the wearer's foot is covered by the tongue 51, the first wing portion 53, and the second wing portion 54 of the tongue wing 5. The second layer 532 of the first wing portion 53 is more elastic than the first layer 531. The first layer 531 of the first wing portion 53 is less elastic than the second layer 532, and the length from one end which is the tongue side to the other end which is opposite the tongue side is longer than the length of the straight line connecting the one end and the other end along the width direction of the foot. Therefore, the second layer 532 can stretch according to the shape of the wearer's foot, thereby improving the fit. The first layer 531 is longer than the length of the straight line connecting one end and the other end of the first wing portion 53 along the width direction of the foot, and has some stretch, so that it allows the second layer 532 to fit the wearer's foot, but has less elasticity than the second layer 532, thus suppressing the stretching of the second layer 532. Therefore, it is possible to improve the fit of the footwear 1 while suppressing the stretching of the tongue wing 5.

[0033] The first wing portion 53 extends medially from the tongue 51. Therefore, when the first wing portion 53 is positioned to cover at least a portion of the metatarsal bones, medial cuneiform bone, and navicular bone of the foot, the first wing portion 53 adheres closely to the arch of the wearer's foot. As a result, at least a portion of the arch is lifted upward by the first wing portion 53, preventing the collapse of the arch of the foot. By preventing the collapse of the arch of the foot, the impact on the foot during running and walking is reduced.

[0034] Furthermore, the first layer 531 may also be provided on the second wing portion 54 to improve the fit of the footwear 1 on both the medial and lateral sides while suppressing the stretching of the tongue wing 5.

[0035] The first layer 531, which is less elastic than the second layer 532, is formed with a shape that has a protruding portion 53c that extends forward or backward from the direct connection line. As a result, although the first layer 531 is less elastic than the second layer 532, the protruding portion 53c becomes part of the stretch, so the first layer 531 can suppress the stretching of the second layer 532 while allowing the second layer 532 to fit according to the shape of the wearer's foot.

[0036] In the first wing section 53, multiple first layers 531 are arranged in a line along the leg length direction. The multiple first layers 531 of the first wing section 53 make it possible to more effectively suppress the elongation of the tongue wing 5 at multiple locations.

[0037] The tip of the first wing portion 53 is joined to the insole 3, and the joining area 31 is positioned away from the edge of the insole 3. As a result, the tip of the first wing portion 53 penetrates deeper into the sole of the wearer's foot. Consequently, the area in contact between the first wing portion 53 and the arch of the foot increases, and the entire arch is lifted upward by the first wing portion 53. This more effectively prevents the collapse of the arch of the foot, further reducing the impact on the foot during running and walking.

[0038] Figure 6 is an unfolded view of the tongue wing according to the first modification. In the tongue wing 5 according to the first modification, two first layers 531 are formed side by side in the direction of the length of the foot. Unlike the example shown in Figure 3, the protruding portion 531c of the first layer 531 provided at the front protrudes rearward from the straight line. Also, the protruding portion 531c of the first layer 531 provided at the rear protrudes forward from the straight line. That is, in the tongue wing 5 according to the first modification, the protruding portions 531c protrude in the opposite direction to that shown in Figure 3. Therefore, when the first layer 531 is formed in this way, multiple protruding portions 531c are arranged in close proximity, so the collapse of the arch of the foot can be suppressed more effectively.

[0039] Figure 7 is an unfolded view of the tongue wing according to the second modification. In the tongue wing 5 according to the second modification, two first layers 531 are formed side by side in the leg length direction. Each of the two first layers 531 has a projection 531c that protrudes forward of the straight connection line and another projection 531c that protrudes forward of the straight connection line. Therefore, when multiple projections 531c are formed on one first layer 531, it can be made longer than the length of the first layer 531 when there is only one projection 531c.

[0040] Figure 8 is an unfolded view of the tongue wing according to the third modified example. In the tongue wing 5 according to the third modified example, the protruding portion 531c is formed in a curve. Therefore, when the protruding portion 531c is formed in a curve, the first layer 531 becomes less prone to expansion and contraction than when the first layer 531 is configured in a straight line, and the elongation of the second layer 532 can be suppressed more effectively. Note that the curved protruding portion 531c may also be formed to protrude in the opposite direction to the example shown in Figure 8.

[0041] Figure 9 is an unfolded view of the tongue wing according to the fourth modification. In the tongue wing 5 according to the fourth modification, one first layer 531 is formed on the first wing portion 53. The first layer 531 has a projection 531c that protrudes forward from the direct connection line. Therefore, if the first wing portion 53 is formed from one first layer 531, the manufacturing of the first layer 531 can be simplified. Also, since the direction in which the first layer 531 expands and contracts is unidirectional, the expansion and contraction of the first layer 531 can be set to any direction. Note that one of the first layers 531 may be formed to protrude in the opposite direction.

[0042] Figure 10 is an unfolded view of the tongue wing according to the fifth modification. In the tongue wing 5 according to the fifth modification, the first wing portion 53 has a first layer 531 with one protrusion 531c formed thereon, and a first layer 531 without the protrusion 531c that extends along a straight line. Therefore, since the first layer 531 with the protrusion 531c expands and contracts in only one direction, the expansion and contraction of the first layer 531 can be set in any direction. In addition, the first layer 531 that extends along the straight line has a small amount of elongation and is difficult to expand and contract, so the expansion of the second layer 532 can be suppressed more effectively.

[0043] The various aspects of this disclosure are described below.

[0044] (1) An upper having an insertion opening into which the foot is inserted, a front opening extending forward from the insertion opening, and a bottom opening formed opposite the insertion opening, A tongue wing having a tongue provided on the inside of the upper that closes at least a part of the front opening, and a wing portion extending from the tongue to one side along the width direction of the foot, A footwear comprising a sole that covers the bottom opening, The aforementioned blade portion is formed with a layered structure having a first layer and a second layer disposed below the first layer. The first layer has less elasticity than the second layer. The first layer is a footwear in which the length from one end which is the tongue side to the other end which is opposite to the tongue side is longer than the length of the straight line connecting the one end and the other end along the width direction of the foot.

[0045] (2) The wing portion is the footwear described in (1) above, extending medially from the tongue along the width direction of the foot.

[0046] (3) The footwear according to (1) or (2) above, wherein the width of the first layer along the length of the foot is narrower than the width of the second layer along the length of the foot.

[0047] (4) The footwear according to any one of (1) to (3) above, wherein the first layer has a protruding portion that protrudes forward or backward from the direct connection line.

[0048] (5) The footwear according to (4) above, wherein the protruding portion is formed having a corner where straight lines extending in different directions are connected.

[0049] (6) The footwear described in (5) above, wherein the angle between the direct connection line and the straight line forming the first layer is α, and the angle is 5° ≤ α ≤ 45°.

[0050] (7) The footwear according to (5) or (6) above, wherein the first layer is formed in a shape having multiple corners.

[0051] (8) The first layer is the footwear according to (4) above, wherein the protruding portion is formed in a curve.

[0052] (9) The footwear according to any one of (1) to (8) above, wherein the first layer is formed in multiples arranged in the direction of the length of the foot.

[0053] (10) Two of the above first layers are formed, The first layer provided at the front of the two first layers has a first projection that protrudes forward from the direct connection wire, The footwear according to (9) above, wherein the rearmost of the two first layers has a second projection that protrudes rearward from the direct connection line.

[0054] (11) Two of the above first layers are formed, The first layer provided in front of the two first layers has a first projection that protrudes rearward from the direct connection wire, The footwear according to (9) above, wherein the rearmost of the two first layers has a second projection that protrudes forward of the direct connection line.

[0055] (12) The footwear according to (9) above, wherein the plurality of first layers include a first layer whose length from one end to the other end is longer than the length of the direct connection line, and a first layer formed in a shape that extends along the direct connection line.

[0056] (13) The footwear according to any one of (1) to (12) above, wherein the tip of the wing portion opposite to the tongue is joined to the insole.

[0057] (14) The footwear described in (13) above, wherein the distance between the edge of the insole and the tip of the wing portion is A, and the distance is 1 mm ≤ A ≤ 20 mm.

[0058] (15) Further comprising an inner bottom that closes the bottom opening, The tip of the wing portion is joined to the middle base, The footwear according to (11) above, wherein the area in which the tip of the wing portion is joined to the insole is the area in the length direction of the foot in which at least one of the metatarsal bones, medial cuneiform bones, and navicular bones of the foot inserted into the upper is located.

[0059] (16) The footwear according to any one of (1) to (15) above, wherein the first layer is provided on the side facing the upper. [Explanation of symbols]

[0060] 1 Footwear, 2 Upper, 21 Insertion opening, 22 Front opening, 23 Bottom opening, 24 Eyelet hole, 3 Insole, 31 Joining area, 4 Sole, 5 Tongue wing, 51 Tongue, 52 Wing part, 53 First wing part, 531 First layer, 531a One end, 531b Other end, 531c Protruding part, 532 Second layer, 54 Second wing part.

Claims

1. An upper having an insertion opening into which the foot is inserted, a front opening extending forward from the insertion opening, and a bottom opening formed opposite the insertion opening, A tongue wing having a tongue provided on the inside of the upper that closes at least a part of the front opening, and a wing portion extending from the tongue to one side along the width direction of the foot, A footwear comprising a sole that covers the bottom opening, The aforementioned blade portion is formed with a layered structure having a first layer and a second layer disposed below the first layer. The first layer has less elasticity than the second layer. The first layer is a footwear in which the length from one end which is the tongue side to the other end which is opposite the tongue side is longer than the length of the straight line connecting the one end and the other end along the width direction of the foot.

2. The footwear according to claim 1, wherein the wing portion extends from the tongue toward the medial side along the width direction of the foot.

3. The footwear according to claim 1, wherein the width of the first layer along the length of the foot is narrower than the width of the second layer along the length of the foot.

4. The footwear according to claim 1, wherein the first layer has a protruding portion that protrudes forward or backward from the direct connection line.

5. The footwear according to claim 4, wherein the protruding portion is formed having a corner where straight lines extending in different directions are connected.

6. The footwear according to claim 5, wherein the angle between the direct connection line and the straight line forming the first layer is α, and the angle is 5° ≤ α ≤ 45°.

7. The footwear according to claim 5, wherein the first layer is formed in a shape having a plurality of corners.

8. The footwear according to claim 4, wherein the first layer is formed in a curved shape.

9. The footwear according to claim 1, wherein the first layer is formed in multiples arranged in the direction of the length of the foot.

10. Two of the aforementioned first layers are formed, The first layer provided at the front of the two first layers has a first projection that protrudes forward from the direct connection wire, The footwear according to claim 9, wherein the rearmost of the two first layers has a second projection that protrudes further rearward than the direct connection line.

11. Two of the aforementioned first layers are formed, The first layer provided in front of the two first layers has a first projection that protrudes rearward from the direct connection wire, The footwear according to claim 9, wherein the rearmost of the two first layers has a second projection that protrudes forward of the direct connection line.

12. The footwear according to claim 9, wherein the plurality of first layers include a first layer whose length from one end to the other end is longer than the length of the direct connection line, and a first layer formed in a shape that extends along the direct connection line.

13. The footwear according to claim 1, wherein the tip of the wing portion opposite to the tongue is joined to the insole.

14. The footwear according to claim 13, wherein the distance between the edge of the insole and the tip of the wing portion is A, and 1 mm ≤ A ≤ 20 mm.

15. The bottom opening is further enclosed with an inner bottom, The tip of the wing portion is joined to the middle base, The footwear according to claim 11, wherein the area in which the tip of the wing portion is joined to the insole is the area in the length direction of the foot in which at least one of the metatarsal bones, medial cuneiform bones, and navicular bones of the foot inserted into the upper is located.

16. The footwear according to any one of claims 1 to 15, wherein the first layer is provided on the side facing the upper.

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