shoes

Abstract

To provide shoes which are provided with ventilation holes at necessary parts, efficiently perform ventilation, promote heat release of foot parts, suppress an increase in temperature and humidity of internal spaces, and enable a wearer to comfortably work out.SOLUTION: In an upper 14 of a shoe 10, an inner thigh side sole region 22 on an inner thigh side is provided with an inner thigh side high ventilation part 22a of high air permeability near a boundary between the arch and the heel along near a sole 12. An inner thigh side sole region 22 other than the inner thigh side high ventilation part 22a has an inner thigh side low ventilation part 22b linearly provided along the sole 12. An outer thigh side sole region 24 on an outer thigh side of the upper 14 is provided with an outer thigh side high ventilation part 24a of high air permeability near an outside the arch, along near the sole 12. An outer thigh side sole region 24 other than the outer thigh high ventilation part 24a has an outer thigh low ventilation part 24b along the sole 12.SELECTED DRAWING: Figure 1

Description

[[Technical Field]]

[0001] The present invention relates to shoes for exercise used for running and the like. [[Background Art]]

[0002] Generally, when a person does exercises such as running while wearing shoes, the temperature and humidity in the inner space of the shoes increase. For example, after 40 minutes of running, the temperature in the inner space of the shoes increases by 8°C or more, and the relative humidity increases by 20% or more. The increase in temperature and humidity raises the risk of increased heart rate and athlete's foot on the feet. Accordingly, in order to suppress an increase in temperature and humidity in the inner space of shoes, there are conventional shoes that are provided with ventilation openings for ventilation.

[0003] For example, the shoe disclosed in Patent Document 1 includes an upper surrounding an inner space for accommodating a foot. On the medial outer surface of the medial foot portion of the upper, there are provided an air suction portion for sucking air from the inner space to the outside when the foot is swung, an air intake portion for taking air into the inner space, an exhaust portion for discharging air from the inner space, and an air intake hole for taking air in from the toe. The air suction portion, the air intake portion, the exhaust portion, and the air intake hole extend in a direction inclined at a predetermined angle with respect to the vertical direction when the shoe is placed on a horizontal surface, and have an elongated slit shape in the extending direction, that is, the longitudinal direction. According to this shoe, the inside of the shoe can be ventilated during swinging of the leg during exercise. [[Prior Art Documents]] [[Patent Documents]]

[0004] [[Patent Document 1]] WO2020 / 174654 [[Outline of the Invention]] [[Problem to be Solved by the Invention]]

[0005] In the aforementioned background technology, the air intake, exhaust, and air intake vents are each formed as slits extending in one direction. The arrangement of numerous meshes and slits in the upper portion of the shoe may impair its durability, fit, and hold. Such compromises could hinder proper movement or make exercise uncomfortable. Furthermore, these ventilation areas are designed to be located throughout the entire shoe. Therefore, a structure that enhances ventilation while maintaining durability is required.

[0006] This invention was made in view of the problems of the background technology described above, and aims to provide a shoe that allows for comfortable exercise by arranging effective ventilation parts to promote ventilation inside the shoe, thereby suppressing the rise in temperature and humidity inside the shoe when worn during exercise. [Means for solving the problem]

[0007] The present invention relates to a shoe comprising an upper that encloses an internal space for accommodating the foot and a sole that contacts the ground, wherein the upper is provided with ventilation sections that connect the internal space and the external space of the shoe, and the ventilation section provided in the inner thigh sole region on the inner thigh side from the widthwise centerline of the upper is provided along the vicinity of the sole from the toe to the heel, with a highly breathable inner thigh high ventilation section near the boundary between the arch and the heel, and an inner thigh low ventilation section that is provided linearly along the sole in the rest of the inner thigh sole region with relatively low breathability, and the ventilation section provided in the outer thigh sole region on the outer thigh side from the widthwise centerline of the upper is provided along the vicinity of the sole from the toe to the outside of the arch, with a highly breathable outer thigh high ventilation section near the outside of the arch, and an outer thigh low ventilation section that is provided linearly along the sole in the rest of the outer thigh sole region with relatively low breathability.

[0008] The upper has a highly breathable toe area on the toe side of the instep, and a relatively less breathable heel area is formed on the heel side of the upper, provided linearly along the sole.

[0009] The ventilation section consists of numerous ventilation openings. Alternatively, the ventilation section may be made of a breathable fabric. [Effects of the Invention]

[0010] The shoes of this invention have ventilation openings in high-priority areas to effectively ventilate the inside of the shoe during swing movements, thus efficiently ventilating and promoting heat dissipation from the feet. This suppresses the rise in temperature and humidity inside the shoe during exercise, allowing for comfortable exercise. Furthermore, by suppressing the rise in temperature and humidity inside the shoe, it is possible to promote heat dissipation from the feet and suppress the increase in heart rate during continuous physical exercise such as marathons. In addition, by improving ventilation inside the shoe, it is possible to prevent deterioration of the hygienic environment inside the shoe and prevent the occurrence of athlete's foot and other related issues. [Brief explanation of the drawing]

[0011] [Figure 1] These are a left side view (a), a right side view (b), a top view (c), and a rear view (d) of a shoe for the right foot according to one embodiment of this invention. [Figure 2] These are a left side view (a), a right side view (b), a top view (c), and a rear view (d) of a shoe for the right foot, representing another embodiment of this invention. [Figure 3] This graph shows the test results of the amount of ventilation during one swing of the foot in a shoe according to one embodiment of this invention. [Figure 4] This graph shows the test results of the amount of heat dissipated from the foot during one swing of the foot in a shoe according to one embodiment of this invention. [Figure 5] These are a left side view (a) and a top view (b) of the right shoe used in the comparative example. [Modes for carrying out the invention]

[0012] The embodiments of this invention will now be described below with reference to the drawings. Figure 1 shows one embodiment of this invention, in which the shoe 10 is used, for example, as an athletic shoe for running or various sports.

[0013] Figure 1 shows an example of the right shoe 10. The left shoe is designed to be symmetrical to the right shoe, so the following explanation will only describe the right shoe, and the description of the left shoe will be omitted. In the following explanation, "upper" and "lower" refer to the vertical positional relationship when the shoe 10 is worn, and "front" and "back" refer to the front-to-back direction of the body when the shoe 10 is worn. Figure 1(a) is a view from the right side of the wearer and is a left side view of the shoe 10, Figure 1(b) is a view from the inner thigh of the wearer and is a right side view of the shoe 10, Figure (c) is a top view from above, and Figure (d) is a rear view from the back.

[0014] The shoe 10 has a sole 12 that contacts the floor or ground, and an upper 14 that encloses an internal space for covering the wearer's foot. The upper 14 forms from the toe area at the front to the heel area at the rear. The upper 14 is made of a shoe sheet 16, the material of which may be synthetic leather, genuine leather, canvas, etc. A reinforcing sheet may be laminated and attached to the back of the sheet 16. The upper 14 is provided with a foot insertion section 18 that opens upward for inserting the wearer's foot.

[0015] The upper 14 is provided with multiple ventilation openings 20 that form ventilation passages connecting the internal and external spaces of the shoe 10. Each ventilation opening 20 is, for example, a perfectly circular perforation. In addition to being perfectly circular, it may also be a pair of holes with approximately equal inner diameters that are perpendicular to each other, or a hole with a polygonal shape. The positions of the ventilation openings 20 coincide with the areas where the amount of air inflow and outflow is high during the swing phase of running when wearing shoes made of breathable mesh material, as determined by computational fluid dynamics (CFD), and the density of the ventilation openings 20 is adjusted according to the magnitude of the air inflow and outflow. For example, in the toe area, ventilation openings 20 are placed in both the areas with high inflow and areas with high outflow. In the midfoot and heel areas, other than the toe area, ventilation openings 20 are placed in the areas with high inflow and outflow. In addition, as will be described later, ventilation openings 20 are provided in arrangements appropriate to each part.

[0016] Next, the location of the ventilation openings 20 will be explained in detail. On the toe side of the instep of the upper 14, ventilation openings 20 that form a ventilation area are provided in a planar manner at a high density, forming a toe high ventilation area 26. As shown in Figure 1(c), the toe high ventilation area 26 is V-shaped with its center in the width direction projecting forward, and for example, 15 ventilation openings 20 are provided in a planar manner at a high density.

[0017] On the upper 14, along the widthwise centerline, multiple ventilation openings 20 are provided on the inward thigh side, extending from the toe to the heel, near the sole 12, forming an inward thigh sole region 22. As shown in Figure 1(b), the inward thigh sole region 22 has a high density of ventilation openings 20 arranged in a planar manner near the boundary between the arch and the heel, forming an inward thigh high ventilation region 22a, while the rest of the region has an inward thigh low ventilation region 22b, arranged in a nearly linear line along the sole 12. In the inward thigh low ventilation region 22b of the front part of the inward thigh sole region 22, for example, 15 ventilation openings 20 are arranged in a line in the front-to-back direction. Slightly away from the inner thigh low ventilation section 22b, the inner thigh high ventilation section 22a has, for example, nine ventilation openings 20 arranged in a planar, high density, and the inner thigh high ventilation section 22a further back than the inner thigh high ventilation section 22a has, for example, three ventilation openings 20 arranged in a single row in the anterior-posterior direction. Of the 15 ventilation openings 20 in the anterior inner thigh low ventilation section 22b, the anterior seven ventilation openings 20 of the inner thigh low ventilation section 22b are arranged along the sole 12, and the posterior eight ventilation openings 20 of the inner thigh low ventilation section 22b are arranged along the long axis of the first metatarsal bone slightly below the medial edge of the first metatarsal bone, which is a negative pressure area created by the separation of air from the surface of the first metatarsal bone.

[0018] On the upper 14, along the widthwise centerline, multiple ventilation openings 20 are provided on the outer thigh side, extending from the toe area to the outside of the arch of the foot, near the sole 12, forming an outer thigh sole region 24. As shown in Figure 1(a), the outer thigh sole region 24 has ventilation openings 20 arranged in a planar, high-density manner near the outside of the arch of the foot, forming an outer thigh high-ventilation area 24a, while the rest of the outer thigh low-ventilation area 24b has ventilation openings 20 arranged in a roughly linear, almost single-row manner along the sole 12. In the rear part of the outer thigh high-ventilation area 24a of the outer thigh sole region 24, for example, six ventilation openings 20 are arranged in a planar, high-density manner. In the front part of the outer thigh low-ventilation area 24b of the outer thigh sole region 24, for example, eight ventilation openings 20 are arranged in a single row in the front-to-back direction, or three of them, closer to the outer thigh high-ventilation area 24a, may be offset in the vertical direction. In total, 14 ventilation openings 20 are provided in the outer thigh sole region 24. The high ventilation section 24a on the outer thigh side and the low ventilation section 24b on the outer thigh side are spaced apart, and no ventilation opening 20 is provided.

[0019] On the heel portion of the upper 14, ventilation openings 20 are provided in a substantially single linear row along the sole 12, and a low-ventilation heel portion 28 is formed. As shown in Figure 1(d), the low-ventilation heel portion 28 is located at the lower end of the heel portion along the vicinity of the sole 12. For example, four ventilation openings 20 are arranged side by side in the left-right direction, wherein the leftmost one is located slightly above the row, and the rightmost one is located slightly below the row.

[0020] In the upper 14, except for the high-ventilation toe portion 26, no ventilation opening 20 is provided in the upper area away from the sole 12. The instep of the upper 14 may be provided with a slit continuous with the foot insertion opening 18, and eyelets for passing shoelaces that lock onto the foot may be provided around the slit.

[0021] The method of using the shoe 10 of this embodiment is the same as that of a general shoe. A user inserts a foot into the internal space through the foot insertion opening 18, tightens shoelaces or the like, and wears the shoe. When exercising while wearing the shoe 10, the movement of the foot inside the shoe 10 when swinging the foot forward or when the foot touches the ground generates an external airflow. The external airflow causes air to repeatedly flow into and out of each ventilation opening 20, thereby ventilating the internal space and suppressing the rise in temperature and humidity in the internal space. The plurality of ventilation openings 20 are provided along the sole 12, so air also flows in the portion close to the sole of the foot, enabling efficient ventilation.

[0022] According to the shoe 10 of this embodiment, ventilation openings 20, which are ventilation areas, are provided in the necessary areas with the minimum necessary area while maintaining strength, thereby efficiently ventilating, promoting heat dissipation from the foot, suppressing the rise in temperature and humidity inside the shoe when worn for exercise, and allowing for comfortable exercise. By suppressing the rise in temperature and humidity inside the shoe, heat dissipation from the foot can be promoted during continuous physical exercise such as marathons. In addition, good ventilation inside the shoe can suppress the deterioration of the hygienic environment inside the shoe and prevent the occurrence of athlete's foot, etc. The inner thigh sole area 22 reaches a position close to the heel on the rear side of the upper 14, ensuring reliable heat dissipation from the foot. The ventilation openings 20 are almost perfectly circular, have no directionality and no areas where stress concentration occurs, so the durability is not compromised even if there are ventilation openings 20 on the upper 14. Most of the ventilation openings 20 are located close to the sole 12 and are not located on the upper 14, so the shoe 10 can maintain durability, stability, fit, etc.

[0023] It should be noted that the shoes 10 of this invention are not limited to the above embodiment, and the ventilation section can be any ventilation section made of fabric that provides the necessary amount of ventilation, in addition to ventilation openings made of multiple holes, as shown in Figure 2, for example. In Figure 2, the same reference numerals are used for components as in the above embodiment and their descriptions are omitted. The difference from the above embodiment is that the inner thigh high ventilation section 22a and inner thigh low ventilation section 22b of the inner thigh sole region 22, the outer thigh high ventilation section 24a and outer thigh low ventilation section 24b of the outer thigh sole region 24, the toe high ventilation section 26, and the heel low ventilation section 28 are not formed by a structure made of a number of ventilation openings, but are made of a breathable fabric 25 such as a breathable mesh fabric, and the breathability performance is set by the breathability of the fabric itself and the area shape of the ventilation section.

[0024] This structure, by appropriately setting the range of the ventilation section 26 as shown in Figure 2, also provides the same functionality and effects as the above embodiment.

[0025] Furthermore, the ventilation holes may be polygonal or other shapes, not just perfect circles. The ventilation holes arranged in a line may be arranged in multiple rows, taking into consideration the amount of airflow and the area of ​​the holes. The sizes of the ventilation holes may also differ. In addition, mesh fabric or similar material may be laminated and attached to the back of multiple ventilation holes on the upper, and mesh fabric may also be laminated on the inside of the ventilation holes to maintain strength. The means of securing the shoe to the foot may be zippers or hook-and-loop fasteners, in addition to shoelaces. The materials of the upper sheet and sole can be freely selected, and the shoes may be used for purposes other than running or athletic shoes for various sports. [Examples]

[0026] The shoes 10 of the present invention were tested for ventilation and heat dissipation performance. For comparison, shoes 30, which had approximately the same number and size of ventilation openings 20 in different positions than the shoes 10 of the present invention, were used as a comparative example and the same tests were performed on them.

[0027] Figure 5 shows an example of a shoe 30 for the right foot, which is a comparative example. Figure 5(a) is a right side view seen from the inner thigh side of the wearer, and Figure 5(b) is a top view seen from above. As shown in Figure 5(a), multiple ventilation openings 20 are provided on the upper 14 from the widthwise centerline toward the inner thigh, along the vicinity of the sole 12, from the arch of the foot to the heel, forming an inner thigh sole region 32.

[0028] In the shoe 10 of the present invention, the inner thigh sole region 22 is formed to be long from the toe to the heel, whereas in the shoe 30, the inner thigh sole region 32 is formed to be short from the arch to the heel. Near the arch, ventilation openings 20 are provided in a planar manner at a high density, forming an inner thigh high ventilation section 32a, and towards the heel, there is an inner thigh low ventilation section 32b provided linearly parallel to the sole 12. As shown in Figure 5(b), on the toe side of the instep of the upper 14, ventilation openings 20 are provided in a planar manner at a high density, forming a toe high ventilation section 34. The toe high ventilation section 34 is V-shaped with its center in the width direction protruding forward, similar to the toe high ventilation section 26 of the shoe 10 of the present invention.

[0029] In comparative example shoes 30, the total number of ventilation openings 20 provided in the inner thigh sole region 32 and the toe area high ventilation region 34 is 52, while in the shoe 10 of the present invention, the inner thigh sole region 22 and the toe area high ventilation region 26 have 42 openings. However, when the number of ventilation openings 20 in other regions is added up, the total number of ventilation openings 20 in shoe 30 is approximately the same as that of shoe 10 of the present invention.

[0030] The results of the ventilation volume test are shown in Figure 3. In the comparative example, the ventilation volume for one swing of the foot (for example, from the start of the kick to landing) was 169 cm³. 3 In contrast, the ventilation volume in the shoe 10, the invention of this application, during one swing of the foot is 244 cm. 3 This was 1.44 times. This indicates that ventilation is performed efficiently.

[0031] Next, Figure 4 shows the results of the foot heat dissipation test. Similar to Figure 3, in one swing of the foot, the heat flux of the comparative example was 3.44 J, while the heat flux of the shoe 10 of the present invention was 3.92 J, which was 1.14 times greater. This indicates that heat is dissipated efficiently.

[0032] Based on the above, the shoes 10 of the present invention have high ventilation and heat dissipation performance, suppressing the rise in temperature and humidity inside the shoe during continuous physical exercise such as marathons, promoting heat dissipation from the feet, suppressing the increase in heart rate, and allowing for comfortable exercise. [Explanation of symbols]

[0033] 10 shoes 12 soles 14 Upper 20 Ventilation vent 22 Inner thigh sole area 22a High ventilation section on the inner thigh 22b Low ventilation section on the inner thigh 24 Outer thigh sole area 24a High ventilation section on the outer thigh side 24b Low ventilation section on the outer thigh side 25 Breathable fabric 26. High-ventilation section at the toe area 28. Low ventilation area at the heel

Claims

1. In a shoe comprising an upper that encloses an internal space for accommodating the foot and a sole that contacts the ground, The upper is provided with ventilation openings that connect the internal and external spaces of the shoe. The ventilation portion, which is provided in the inner thigh sole region on the inner thigh side from the widthwise center line of the upper, is provided along the vicinity of the sole from the toe to the heel, The area near the boundary between the arch and heel is a highly breathable inner thigh-side high-ventilation area, while the rest of the inner thigh-side sole area is formed by linearly extending along the sole, creating a relatively less breathable inner thigh-side low-ventilation area. The ventilation portion, which is provided in the outer thigh sole region on the outer thigh side from the widthwise centerline of the upper, is provided along the vicinity of the sole from the toe area to the outer side of the arch of the foot. The shoe is characterized by having a highly breathable outer thigh area near the outer arch of the foot, and a relatively less breathable outer thigh area formed linearly along the sole in the rest of the outer thigh sole region.

2. The upper has a highly breathable toe area formed on the toe side of the instep. The shoe according to claim 1, wherein the heel portion of the upper is formed with a relatively low-breathability heel portion that is provided linearly along the sole.

3. The shoe according to claim 1 or 2, wherein the ventilation section comprises a number of ventilation openings.

4. The shoe according to claim 1 or 2, wherein the ventilation portion is made of a breathable fabric.

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