JP7627982B1 - footwear - Google Patents

Abstract

[Problem] The objective is to provide footwear that can be put on while standing, without bending over or sitting down, and without using a shoehorn or hands. [Solution] This footwear has a heel part, and is characterized in that the cross section cut horizontally to wrap around the heel is formed in a semicircular arc, and the footwear comprises a first core material disposed in the heel part inside the upper, and a second core material disposed above the first core material. [Selected Figure] Figure 1

Description

The present invention relates to footwear that has two types of core material.

When putting on traditional footwear with heels, such as sneakers or business shoes, if you do not use a shoehorn or other tool, the heel of the shoe may be crushed or damaged.

Therefore, to avoid crushing the heel, you need to use a shoehorn or your hands when putting on your shoes, but this requires you to bend down or sit down every time you put them on, which is a hassle.

On the other hand, footwear that can be put on without using hands or a shoehorn has been proposed (for example, Patent Document 1). The footwear in Patent Document 1 is characterized in that a protrusion extending diagonally upward and backward is formed at the upper end of the heel, and the protrusion is equipped with a single moon-shaped core that includes a moon-shaped core extension extended from a moon-shaped core provided in the heel.

Specifically, the footwear in Patent Document 1 is a short shoe 11a with a heel 14 at the rear end, and a hard protrusion 16 is formed at the top end of the heel 14, extending diagonally upward and backward. The protrusion 16 is provided with a moon-shaped core extension 17b that extends from a moon-shaped core 17 provided at the heel 14 as a core to provide hardness. The height of the tip of the protrusion 16 is made higher than the height of the front end of the opening 15. The protrusion 16 is also curved with a concave inner side in cross section, and the contour shape of the tip 16a of the protrusion 16 is rounded to increase strength and soften the impact on the heel.

Patent Publication No. 2022-139151

However, in the footwear of Patent Document 1, the core and the protruding piece are one continuous core material, so the range of motion that the core can collapse backward is limited. Also, because the above structure firmly fixes the crescent-shaped core to the heel, almost no movement is permitted, so the heel has no flexibility when walking, making it uncomfortable.

The present invention has been made in consideration of the above points, and aims to solve the problems of the above-mentioned conventional technology. Specifically, the objective of the present invention is to provide footwear that can be put on while standing, without bending or sitting, without using a shoehorn or hands, by combining two core materials and giving flexibility to the upper part of the heel, and that is easier to put on and take off than conventional footwear, fits the foot when worn, and is easy to walk in.

Footwear according to one aspect of the present invention is characterized in that the heel section has a semicircular cross section cut horizontally to encase the heel, the first core material is disposed inside the upper, and the second core material is disposed above the first core material, and the upper part of the heel section extends at an angle obliquely backward from the vertical direction.

With this configuration, the upper part of the heel is inclined diagonally backward rather than vertically, and the core material is arranged up to the upper part of the heel, so the heel does not twist when put on and can be put on smoothly. Also, because it is composed of two core materials, the upper second core material and the lower first core material, the heel does not become too stiff as with a single core material, and it is flexible, making it easier to put on and take off than conventional shoes. Also, even when the footwear is worn, because the core material is composed of two, the heel does not become too stiff as with a single core material, making it easier to walk without interference when walking.

This footwear is also characterized in that a lower portion of the second core material is arranged to overlap the first core material. With this configuration, the lower portion of the second core material overlaps the first core material, resulting in a seamless connection with no gaps, ensuring a certain level of strength overall while providing flexibility to the upper second core material portion. In addition, the lower portion of the second core material overlaps the first core material, preventing the end surfaces of each from interfering with the foot, which can occur when the first and second core materials are completely separated.

The footwear is also characterized in that a lower portion of the second core material is bonded to the first core material. With this configuration, the core material can be made into a single piece, improving the stability of the heel. Also, since only a lower portion of the second core material is bonded to the first core material and the upper portion is not bonded, the flexibility of the second core material can be maintained.

The footwear is also characterized in that the second core is narrower at the bottom than at the top. This configuration minimizes the area where the foot touches the core when walking, improving comfort when walking. Also, by configuring the second core to be narrower at the bottom than at the top, the flexibility of the second core can be maintained even when the bottom is bonded to the first core.

The footwear is also characterized in that the second core material has a shape resembling a cone-shaped mortar cut in the height direction, with the upper end of the roughly fan-shaped fan spreading upward being rounded into a convex arc shape that projects backward. With this configuration, the second core material acts as a shoehorn, making it easy to insert the foot.

This footwear is also characterized in that the second core is thinner than the first core. With this configuration, the strength of the heel and the shoe is ensured by making the first core thicker, and the flexibility of the second core is ensured by making the second core thinner. This makes it possible to balance the rearward bending of the second core with the strength of the first core to support the sole and core, making it easier to put on and take off, and ensuring stability when walking.

The footwear is also characterized in that the thickness of the first core is in the range of 0.2 mm to 2.0 mm, the thickness of the second core is in the range of 0.2 mm to 2.0 mm, and the thickness of the first core is greater than the thickness of the second core. This configuration achieves a balance between the rearward flexibility of the second core and the strength of the first core to support the sole and core, making it easier to put on and take off, and the core has the strength to hold the heel when walking, making it easier to walk.

This footwear is also characterized in that the first core material and the second core material are formed from a resin material made by solidifying hot melt resin. With this configuration, the first core material is shaped to follow the curve of the heel, and the second core material is shaped to resemble a shoehorn. With this configuration, the footwear is easy to put on and take off, and the heel is held in place along the foot, making it easier to walk. Also, because it is made of resin, it can be made lighter.

The footwear is also characterized in that the first core material is a counter. With this configuration, the lower first core material serves as a counter, providing the strength to hold the heel firmly, ensuring the strength of the heel and shoe, while also making walking easier.

This footwear is also characterized in that the cushioning material is contained inside the opening, and the height of the cushioning material is higher on the rear side of the opening than on the sides of the opening. This configuration allows the foot to be inserted smoothly into the shoe, and the elasticity of the sponge member improves the feel of the opening on the foot. In addition, because the cushioning material is configured to be higher on the rear side of the opening, i.e., on the heel side, the foot is less likely to slip off the footwear after it has been put on, making the footwear easy to put on but difficult to take off.

This footwear is also characterized in that the cushioning material is contained inside the opening, and that the cushioning material is arranged only on the rear side of the opening. With this configuration, for example in the case of pumps, the cushioning material is not provided on the sides of the opening, but only on the rear side, resulting in a clean and elegant design for the opening, and the cushioning material on the rear side makes the pumps easier to put on with less friction, and they are less likely to slip off after being put on.

The footwear is also characterized in that the inner surface of the upper is made of a material that is more slippery than the outer surface. This configuration allows the foot to be inserted smoothly into the footwear.

The footwear further includes a tongue, one side of which is sewn to the upper. With this configuration, the tongue is sewn to the upper, so that it does not slip when the foot is put on, allowing the footwear to be put on without using hands. Also, with one side of the tongue sewn, the front opening through which shoelaces and the like are arranged is not simply restricted and can be easily opened when putting on the footwear, making it easy to put on.

This footwear is also characterized in that the tongue is switched halfway between the front and rear of the footwear, with the rear side inclined more vertically than the front side. With this configuration, the rear side of the tongue, i.e., the opening side, is more upright than the front side, so the foot can be smoothly inserted into the footwear without the tongue sagging and blocking the opening. Also, even after putting on the footwear, the rear side of the tongue remains upright, so it is less likely to interfere with the foot when walking.

The footwear is also characterized in that the tongue is switched by sewing the border between the rear and front sides. This configuration makes it possible to fix the tongue without causing discomfort to the foot. This makes the footwear easy to put on and take off, and comfortable to walk in.

The footwear further includes shoelaces, which are made of rubber. With this configuration, there is no need to tie the shoelaces when putting on or taking off the shoes, and the shoes can be put on or taken off without using your hands. The movement of the rubber also widens the space for the foot, making it easy to put on the shoes.

This footwear is also characterized by the fact that a slit is formed on the side of the upper that continues from the opening, and a rubber material that biases the slit in a direction to close is provided on the inner surface of the upper. With this configuration, the gap for inserting the foot is widened, making it easier to put on the foot.

This footwear is also characterized in that a rubber belt or rubber cord is arranged inside the upper at a position on the side of the opening, and gathers are formed in the opening part where the rubber belt or rubber cord is arranged. With this configuration, the sides of the opening part stretch, widening the gap for inserting the foot, making it easier to put on the footwear. In addition, after putting on the footwear, the foot is less likely to slip off, making the footwear easy to put on and difficult to take off.

The footwear of the present invention allows you to put on your shoes smoothly while standing, without bending over or sitting, and without using a shoehorn or your hands.

1 is a side view of footwear according to a first embodiment of the present invention. FIG. 2 is a perspective view of the tongue portion of footwear 10. A side view (a) of the first core material and the second core material separated, and a side view (b) of them overlapping. Rear view (a), central cross-sectional view (b), and cross-sectional view (c) of the overlapping first and second core materials. 1 is a diagram showing a foot being inserted into footwear 10 according to a first embodiment of the present invention. FIG. 11 is a side view of footwear 100 according to a second embodiment of the present invention. FIG. 13 is a side view of footwear 200 according to a third embodiment of the present invention. FIG. 13 is a side view of footwear 300 according to a fourth embodiment of the present invention.

The following is a detailed description of footwear 10 according to one embodiment of the present invention. Note that the present invention is not limited to this embodiment. Furthermore, the components in the following embodiment include those that are easily replaceable by a person skilled in the art, or those that are substantially the same. Furthermore, the configurations described below can be combined as appropriate. Furthermore, various omissions, substitutions, or modifications of the configuration can be made without departing from the spirit of the present invention.

First Embodiment
Fig. 1 is a side view of footwear 10 according to a first embodiment of the present invention. Fig. 2 is a perspective view of the tongue portion of footwear 10. Fig. 3(a) is a side view of the first core and the second core separated from each other, and Fig. 3(b) is a side view of the overlapping first core and the second core. Fig. 4 shows the overlapping first core and the second core, with (a) being a rear view, (b) being a central cross-sectional view, and (c) being a cross-sectional view.

As shown in FIG. 1, footwear 10 according to one embodiment of the present invention includes an outsole 30 that constitutes the sole of the shoe, and an upper 20 that covers the instep, with the upper 20 having a heel section 40 at its rear end that covers the area around the heel.

In this embodiment, the outsole 30 is made of, for example, a relatively hard rubber material, and has a rolling sole that supports the foot to move forward naturally. The outsole 30 may be made of any material other than rubber, such as leather or sponge. The thickness of the outsole and the pattern on the sole are not important.

The upper 20 comprises an upper body 21 that covers the forefoot, part of the midfoot, and heel of the user. The design and material of the upper body 21 are not important.

The upper 20 also includes a tongue 22. The tongue 22 is arranged to cover an opening 23 that is closed from the opening 24 to the front of the approximate center in the width direction. The tongue 22 has a lower tongue portion 22a that extends from the front end to a cut-off portion 22c that is made by sewing, and an upper tongue portion 22b that extends from the cut-off portion 22c to the top end of the tongue (see FIG. 2). The presence of the cut-off portion that is made by sewing prevents the tongue 22 from sagging and closing the opening. In addition, because the upper tongue portion 22b is upright, it is less likely to interfere with the foot when walking.

In this embodiment, the tongue lower part 22a and the tongue upper part 22b are configured with one side sewn to the upper body 21, so that the tongue 22 is easy to open without restricting the opening of the opening 23 and the opening of the shoe opening 24, making it easy to wear. The tongue 22 can also be configured with both sides sewn to the upper body 21 with some room to spare, or with both sides glued to the upper body 21 using a stretch material.

The upper 20 has a string portion 50 that connects the opening 23 of the upper body 21 so as to cover the tongue lower portion 22a and the tongue upper portion 22b. In this embodiment, the string portion 50 is made of rubber so that the opening 23 widens when the foot is put in. The string portion 50 may be made of, for example, cotton, polyester, linen, acrylic, silicone, suede, or ribbon.

In this embodiment, the upper 20 has the tongue lower portion 22a, the tongue upper portion 22b, and the upper body 21 all made of the same material, but this is not limited thereto, and each may be made of a different material.

The upper 20 has an opening 24 through which the foot is inserted, the forefoot is placed in the part in front of the opening 24, and the part behind the opening 24, i.e. the heel part 40, supports the heel of the person's foot.

In this embodiment, the upper 20 is made of a material on the inside that is more slippery than the outside, allowing the foot to be inserted smoothly into the footwear 10.

In addition, the heel portion 40 of the upper body 21 contains a first core material 60 and a second core material 70, so the heel portion 40 does not need to be crushed and can be put on smoothly without using hands.

As an example of this embodiment, the first core material 60 is 1.2 mm thick, and the second core material 70 is 0.8 mm thick, with the second core material 70 being thinner than the first core material 60. This configuration allows the second core material to flex backward, while the thinner first core material 60 has the strength to support the heel and the core material.

The above is an example of this embodiment, and the thickness of the first core material 60 is in the range of 0.2 mm to 2.0 mm, preferably 0.4 mm to 1.5 mm, and the thickness of the second core material 70 is in the range of 0.2 mm to 2.0 mm, preferably 0.4 mm to 1.5 mm, and the second core material 70 is thinner than the first core material 60.

As shown in FIG. 3(a), the first core material 60 and the second core material 70 are formed by solidifying a hot melt resin material and shaping the first core material 60 to fit the curve of the heel portion 40. The curved shape of the first core material 60 firmly holds the heel and stabilizes walking, while the shape of the second core material 70 resembles a shoehorn, making it easier to insert the foot. In addition, since the first core material 60 and the second core material 70 are made of resin, they can be made lightweight. Note that the material of the first core material 60 and the second core material 70 may be a material other than resin.

As shown in FIG. 3(a), the first core material 60 is a counter that is cut horizontally to have a semicircular cross section so as to encase the heel, and is firmly attached to the outsole 30, providing the strength to hold the heel firmly, ensuring the strength of the heel portion 40 and the entire footwear, while also making walking easier.

The second core material 70 is roughly fan-shaped, spreading upward, and rounded so that the top end forms a convex arc facing backward, like a cone cut in the height direction, and extends at an angle obliquely backward rather than vertically. This makes it easier to insert the foot.

In addition, the second core material 70 is narrower at the bottom than at the top, which minimizes the area where the foot touches the core material when walking, improving comfort when walking.

As shown in FIG. 3(b), the heel portion 40 is made up of two core materials, the upper first core material 60 and the lower second core material 70. This means that the heel portion is not too stiff as in the case of a single core material, and is flexible, making it easier to put on and take off than before. It also makes walking easier, as it is less likely to interfere with footwear when walking.

In addition, the upper part of the first core material 60 and the lower part of the second core material 70 are glued to the heel part 40 so that they overlap, forming a single core material with no gaps, ensuring a certain level of strength as a whole and a certain level of stability in the heel part, while only a portion of the lower part of the second core material 70 is glued, allowing the upper part of the second core material to have a certain level of flexibility. It also prevents the upper end of the first core material 60 or the lower end of the second core material 70 from interfering with the foot, which can occur if the first core material 60 and the second core material 70 are completely separated.

As shown in FIG. 4(a), in this embodiment, the first core 60 and the second core 70 have a symmetrical shape with the highest part located at the center of the heel in the width direction.

As shown in FIG. 4(b), in this embodiment, the first core material 60 is bonded to the outside (rear side) and the second core material 70 is bonded to the inside (front side). It is also possible to configure the first core material 60 to be on the inside and the second core material 70 to be on the outside.

Figure 4(c) is a diagram of the second core material 70 viewed from above in the BB cross section of Figure 4(b), and the part of the second core material 70 that is most bulging is approximately semicircular.

As shown in Figs. 1 and 4, the footwear 10 of this embodiment has a cushioning material 80 enclosed around the periphery of the opening 24 through which the user's foot is inserted. This allows the foot to be inserted smoothly into the footwear. The elasticity of the cushioning material 80 also improves the feel of the foot. Note that, although sponge is enclosed around the periphery of the opening 24 in this embodiment, any material with cushioning properties will do, and is not limited to sponge.

In addition, the cushioning material 80 in this embodiment is higher on the rear side than both sides of the opening 24, making the footwear difficult to slip off after wearing, making it easy to put on but difficult to take off.

The footwear 10 in the first embodiment has been described as a sneaker with shoelaces, but it may be other sports shoes or other types of footwear.

Second Embodiment
Next, a second embodiment of the present invention will be described. In the above-mentioned first embodiment, sneakers with laces are used as an example, but the present invention is not limited to sneakers and can be applied to loafers, business shoes, etc. In the following, the same reference numerals are used to designate the same components as in the first embodiment, and the description will be centered mainly on the differences from the first embodiment.

Figure 6 is a side view of footwear 100 according to a second embodiment of the present invention. The footwear 100 of the second embodiment has a loafer shape, but may be other footwear such as business shoes, formal shoes, or slip-ons.

The footwear 100 of the second embodiment of the present invention includes an outsole 130 that constitutes the sole of the shoe, and an upper 120 that covers the foot, with the upper 120 having a heel section 140 at its rear end that covers the heel area.

The upper 120 of the second embodiment has an upper body 121, the outer side of which is made of, for example, artificial leather so that it fits the foot as it is worn. The material of the upper body 121 may be genuine leather, synthetic leather, natural fibers, synthetic fibers, etc.

The material on the inside of the upper body 121 in the second embodiment is a combination of multiple materials to improve durability, comfort, and appearance. For example, natural leather, synthetic leather, synthetic fibers, etc. may be used.

The upper 120 is equipped with a strap 125 on the instep. The outer side of the strap 125 is made of the same artificial leather as the upper body 121, and a rubber material is arranged on the inside. This allows the rubber material to spread when the foot is put in, reducing the feeling of pressure on the foot.

The front side of the strap 125 may be made of a different material than the front side of the upper body 121. The design may also have two or more straps on the instep, or no straps at all. The straps may also have decorations such as metal fittings, ribbons, embroidery, fringes, and stones.

In this embodiment, the upper 120 has a straight cut opening 124, which allows the foot to be put on smoothly. In addition, the periphery of the opening 124 can be made of elastic rubber to make it even easier to put on.

In this embodiment, the toe portion of the upper 120 is stitched. The stitching may be a horizontal line, U-shape, W-shape, or other stitching, or may have decorations such as holes or jewels. The shape of the toe portion may be rounded, pointed, or angular.

The outsole 130 of the footwear 100 of the second embodiment is made of a rubber material to prevent slipping. The outsole 130 may be made of rubber, leather, or sponge. In addition, the thickness of the outsole, the pattern on the back, and the presence or absence of a heel are not important.

The footwear 100 also includes an insole 131. The insole 131 has a bulge that supports the arch of the foot to reduce foot fatigue when walking. The insole 131 supports walking and is provided with a cushion to reduce the weight placed on the sole of the foot.

The insole 131 is also made of a material that has a certain degree of slipperiness. This makes it easy to put on. On the other hand, if the insole 131 is too slippery, the foot will slip inside the footwear when walking, making it difficult to walk, so a material with a certain degree of slipperiness is preferable.

The upper 120 has an opening 124 through which the foot is inserted, the forefoot is contained in the part in front of the opening 124, and the part behind the opening 124, i.e. the heel part 140, supports the heel of the person's foot.

In addition, the heel portion 140 of the upper 120 contains a combination of two core materials, a first core material 60 and a second core material 70. By combining the two core materials, the first core material 60 and the second core material 70, the heel portion 140 does not easily break or collapse, and the foot can be smoothly inserted into the footwear, making it easy to wear.

Rubber material 151 is enclosed on both sides of the inside of the upper along the opening 124, and gathers 150 are formed on both sides of the opening 124. The gathers 150 stretch due to the rubber material 151 on the inside. Therefore, the gathers 150 shrink after the foot is put in due to the stretch of the gathers, improving the fit. This makes it easier to walk after putting on the footwear and makes it difficult for the feet to slip off the footwear.

Third Embodiment
Next, a third embodiment of the present invention will be described. In the first embodiment described above, sneakers with laces are used as an example, but the present invention is not limited to lace-up shoes, and can also be applied to slip-on sneakers and the like. In the following, the same reference numerals are used to designate the same components as in the first embodiment, and the following description will focus mainly on the differences from the first embodiment.

Figure 7 is a side view of footwear according to a third embodiment of the present invention. As shown in Figure 7, footwear 200 is configured without laces 50 or openings 23, unlike footwear 10 of the first embodiment.

Instead, footwear 200 has slits 225 of a predetermined dimension formed on both sides of upper body 221, continuing from opening 224 and extending forward. Rubber belts 226 are sewn to the inside of upper body 221 at positions corresponding to slits 225, and bias slits 225 in a direction to close them.

When the footwear 200 is put on, the slit 225 widens due to the slit 225 and the rubber belt 226, widening the opening 224 and making it easy to put on. After the foot is fully put into the footwear 200, the slit 225 is biased in a direction to close by the rubber belt 226, making it difficult for the footwear to slip off when walking. Even when the footwear 200 is not being put on, the slit 225 is biased in a direction to close by the rubber belt 226, so the shape of the footwear 200 is stable.

In addition, when putting on the footwear 200, the opening 224 is opened by the slit 225 and the rubber belt 226, and the heel portion 240 of the upper body 221 functions like a shoehorn due to the first core material 60 and the second core material 70 contained therein, making it easy to put on.

Fourth Embodiment
Next, a fourth embodiment of the present invention will be described. In the first embodiment described above, sneakers with laces are used as an example, but the present invention is not limited to sneakers and can also be applied to flat pumps made of artificial leather. In the following, the same reference numerals are used to designate the same components as in the first embodiment, and the differences from the first embodiment will be mainly described.

Figure 8 is a perspective view of footwear according to a fourth embodiment of the present invention. As shown in Figure 8, footwear 300 is a flat pump, but it may be other footwear such as genuine leather formal shoes, flat shoes, pumps, or ballet shoes.

Furthermore, as in the first and second embodiments, the heel portion 340 inside the upper is provided with a lower first core material 60 and an upper second core material 70, so that the same effects as in the first and second embodiments are achieved.

In addition, footwear 300 has rubber material 351 embedded on both sides of the inside of the upper along the opening, and gathers 350 are formed on both sides of the opening. Gathers 350 stretch due to the rubber material 351 on the inside. Therefore, due to the stretch of gathers 350, the gathers shrink after the foot is put in, improving the fit. As a result, after putting on the footwear, the feet are less likely to slip off the footwear when walking, making it easier to walk.

In addition, the heel part 340 inside the upper contains cushioning material 341. The presence of cushioning material 341 makes the shoes easy to put on, less likely to slip off, and comfortable to the foot. In particular, the gathered part 350 tilts the upper part of the heel part 340 towards the foot, so the cushioning material 341 makes the shoes comfortable to the foot and does not cause pain when worn.

The footwear 300 also has a suede portion 342 attached to the inner side of the heel portion 340. This suede material provides a good feel on the foot and creates friction, making the footwear less likely to slip off.

Footwear 300 uses smooth leather on upper surface 320, and has smooth section 324 extending from both ends of gathered section 351 on the inside of the upper to the opening. In this embodiment, inner smooth section 324 is made of thinner smooth leather than the smooth leather on the upper surface side, and is configured to not feel uncomfortable when worn. Furthermore, the presence of smooth section 324 on the inside of the opening gives the shoes an aesthetically pleasing appearance without compromising the formal impression.

The inside of the upper is mainly made of polyester section 323 using polyester material, except for smooth section 324 and suede section 342. Polyester section 323 makes the shoe comfortable to wear, comfortable on the feet, and highly durable. Note that polyester is just one example, and other materials and other synthetic fibers may also be used. The other materials mentioned above are also just examples of this embodiment, and other materials may also be used.

5. Other embodiments
As described above, a preferred embodiment of the present invention has been described with reference to the drawings. However, the present invention is not limited to the above-described embodiment, and various modified or altered examples within the scope of the claims also fall within the technical scope of the present invention.

For example, in the above embodiment, the upper part of the first core material 60 and the lower part of the second core material 70 are bonded together so that they overlap, but it is also possible to configure the upper part of the first core material 60 and the second core material 70 so that they overlap but are not bonded together. By configuring them in this way so that they are not bonded together, the flexibility of the part above the heel corresponding to the second core material 70 is increased. In this case, it is preferable to position the second core material 70 on the rear side of the first core material 60, and by configuring them in this way, it is possible to prevent the lower part of the second core material 70 from interfering with the person's foot.

10 Footwear 20 Upper 21 Upper body 22 Tongue 22a Tongue lower part 22b Tongue upper part 22c Turnover part 23 Opening 24 Opening 30 Outsole 40 Heel part 50 Lace part 60 First core material 70 Second core material 80 Cushioning material 100 Footwear 120 Upper 121 Upper body 124 Opening 125 Strap 130 Outsole 131 Insole 140 Heel part 150 Gathered part 151 Rubber material 200 Footwear 220 Upper 221 Upper body 224 Opening 225 Slit 226 Rubber belt 240 Heel part 300 Footwear 320 Upper body 323 Polyester part 324 Smooth part 340 Heel part 341 Cushioning material 342 Suede part 350 Gathered part 351 Rubber material

Claims (15)

A first core material is disposed inside the upper, the first core material having a cross section cut horizontally in a semicircular arc shape in the heel portion so as to wrap around the heel,
A second core material is disposed above the first core material,
The upper part of the heel portion extends obliquely backward from the vertical direction,
The second core material is configured so that the width is narrower at the bottom than at the top, and has a shape resembling a rounded mortar shape cut in the height direction so that the upper end of the fan-shaped fan spreading upward is a convex arc shape toward the rear,
Footwear, characterized in that a lower portion of the second core material is arranged so as to overlap the first core material, further forward than the first core material . The second core material is characterized in that a lower part of the second core material is bonded to the first core material.
Footwear according to claim 1. The second core material is formed to be thinner than the first core material.
Footwear according to claim 1. The thickness of the first core material is in the range of 0.2 mm to 2.0 mm;
The thickness of the second core material is in the range of 0.2 mm to 2.0 mm;
The thickness of the first core material is greater than the thickness of the second core material.
Footwear according to claim 3. The first core material and the second core material are formed of a resin material obtained by solidifying a hot melt resin.
Footwear according to claim 1. The first core material is a counter.
Footwear according to claim 1. Cushioning material is embedded inside the opening,
The height of the cushioning material is higher at the rear side of the opening than at the side of the opening.
Footwear according to claim 1. Cushioning material is embedded inside the opening,
The cushioning material is disposed only on the rear side of the opening portion.
Footwear according to claim 1. The inner surface of the upper
It is characterized by being made of a material that is more slippery than the outer surface.
Footwear according to claim 1. Further equipped with a tongue,
One side of the tongue is sewn to the upper.
Footwear according to claim 1. The tongue is switched midway in the front-to-back direction of the footwear,
The rear side is inclined more vertically than the front side.
Footwear according to claim 10. Footwear according to claim 11, characterized in that the tongue is switched by sewing the border between the rear side and the front side. Equipped with shoelaces,
The shoelace is a rubber shoelace.
Footwear according to claim 1. A slit is formed on the side of the upper, leading from the opening.
A rubber material that biases the slit in a direction to close the slit is provided on the inner surface of the upper.
Footwear according to claim 1. A rubber belt or rubber cord is arranged inside the upper at a side position of the opening, and gathers are formed at the opening part where the rubber belt or rubber cord is arranged.
Footwear according to claim 1.

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