Moon shaped core and footwear having the same

Abstract

To provide footwear which allows a wearer to smoothly wear the footwear without sitting or squatting and without using his / her hand or a shoehorn in a standing state of the wearer, and can easily fit the feet of the wearer in wearing and allows the wearer to walk with comfort, and a moon shaped core.SOLUTION: Footwear has a heel part. On an upper side of the heel part, a heel guide part extending obliquely rearward is provided. In the heel part and the heel guide part, a moon shaped core is included. The moon shaped core has: a core main body part; and a core crest part on an upper side of the core main body part. In the core main body part, a cross section which is cut in a horizontal direction so as to wrap the heel of a wearer is formed into a semi-arc shape, and a notch which is inclined a linear fashion or a curved fashion from a lower end to forward and obliquely upper directions is provided on a front end part of a lower end.SELECTED DRAWING: Figure 11

Description

[Technical field]

[0001] The present invention relates to a moon-shaped core and footwear equipped with the same. [Background technology]

[0002] When wearing footwear with a heel, if you put only the tip of your foot inside the shoe while pressing the heel of the shoe against it, you may damage the shoe. Also, when wearing footwear with a heel, you must avoid crushing the heel. If you crush the heel, the shoe will not fit well to your foot and will be uncomfortable to wear.

[0003] Therefore, in order to avoid crushing the heel, it is necessary to use a shoehorn or hands when putting on shoes, but this requires bending and sitting down, which is troublesome.

[0004] Therefore, footwear with a heel that can be worn while standing without bending or sitting has been proposed (for example, Patent Document 1). The footwear in Patent Document 1 has a protrusion that extends diagonally upward and backward from the upper end of the heel, and the protrusion has a crescent-shaped core extension that extends from the crescent-shaped core provided in the heel as a core. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2022-139151 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the footwear of Patent Document 1, the crescent-shaped core is provided directly above the sole, and its lower end extends to both front ends, so that both ends of the lower end of the crescent-shaped core may dig into the sole and damage the sole. In addition, because this structure fixes the crescent-shaped core firmly and allows almost no movement, the heel area has no flexibility when walking, making it uncomfortable.

[0007] To provide footwear and its moon-shaped core which can be put on while standing without bending over or sitting down, without using a shoehorn or hands, which is easier to put on and take off than conventional footwear, which fits the foot when worn, and which is easy to walk in. [Means for solving the problem]

[0008] A moon-shaped core according to one aspect of the present invention is a moon-shaped core used in the heel part of footwear, and comprises a core main body and a core ridge part above the core main body, the cross section of which, cut horizontally to encase the heel, is formed in a semicircular arc shape, and both front ends of the lower end have notches that slope linearly or curvedly from the lower end diagonally upward toward the front.

[0009] According to this configuration, by equipping the footwear with this moon-shaped core, a heel guide portion is provided above the heel portion, extending diagonally backward, improving ease of putting on, and the shoe can be put on while standing without using a shoehorn or hands. Also, the moon-shaped core is contained in the heel portion and heel guide portion, and the ease of putting on can be further improved while maintaining the shape of the heel portion and heel guide portion. Also, the core body portion is formed in a semicircular arc shape when cut horizontally so as to encase the heel, so that the heel can be reliably supported.

[0010] In addition, the front end of the lower end of the core body has a notch that slopes from the lower end diagonally upward in a straight or curved manner, which reduces the bite or dent of the front end of the lower end of the moon-shaped core into the sole. This notch makes it less likely that the moon-shaped core will be pushed up by the repulsive force caused by the compression deformation of the sole when the foot lands on the ground while walking or running, so the moon-shaped core is less likely to move upward after the foot lands on the ground. This makes it less likely that discomfort such as blisters will occur when landing, and the moon-shaped core can maintain a fit on the heel when landing.

[0011] In addition, due to this cutout, when the foot lands on the ground and the sole deforms due to compression, etc., the upper side also has room to flex and deform in the direction of the cutout (towards the front of the shoe), improving the cushioning of the entire shoe and improving comfort.

[0012] This moon-shaped core is also characterized in that the core body and the core ridge are integrally formed, and when viewed from the back, the core ridge extends upward from the core body and is narrower than the core body. Here, "core ridge narrower than the core body" means that the maximum width of the core ridge is narrower than the maximum width of the core body when viewed from the back.

[0013] According to this configuration, the moon-shaped core has a core body and a core ridge formed as one piece, which reduces the number of parts compared to when the core body and the core ridge are formed separately. Also, the moon-shaped core can be easily contained within the heel and heel guide. Also, because the core ridge extends upward from the core body, which is narrower than the core body, the rigidity can be increased compared to when the core ridge is as wide as the core body, and the foot can be inserted smoothly.

[0014] The moon-shaped core is also characterized by being integrally molded from resin. With this configuration, it is possible to obtain a moon-shaped core that is lightweight and highly durable.

[0015] In addition, when viewed from the back, the connecting portion between the core body and the core mountain is recessed on both sides, and the upper part from the connecting portion bulges left and right. With this configuration, since the core mountain bulges left and right, it is easier to put on the foot and is less likely to get caught, making it safer, than when the width is gradually narrowed from the core body. Also, since the connecting portion between the core body and the core mountain is recessed on both sides, this portion has good flexibility, making it easier to put on the foot.

[0016] In addition, when viewed from the back, the upper end of the rear end of the core mountain portion is generally straight or has a downwardly convex arc shape, and the left and right sides are rounded. With this configuration, it is easier to put on the foot and less likely to get caught, making it safer than when the width is gradually narrowed from the core body portion.

[0017] In addition, when viewed from the side, the upper edge of the core mountain portion of this moon-shaped core is rounded, and the highest point of the upper edge is forward of the rear end of the core mountain portion. With this configuration, if the upper end of the core mountain portion is at the rear end, there is a risk that the foot will easily get caught in the rear end portion, but with this configuration, the foot is less likely to get caught when putting on the shoe.

[0018] In addition, the upper part of this moon-shaped core, from the top of the core mountain part to the part that curves to bulge forward, lies horizontally rather than vertically. With this configuration, since the upper part of the core mountain part lies horizontally, it is less likely to get caught when putting on shoes, making them easy to put on and safe. On the other hand, the moon-shaped core of Patent Document 1 extends in a straight line when standing close to vertical, making it difficult to put on and take off shoes when putting them on or taking them off, and also when walking, the heel stands up close to the back of the foot, which may interfere with the foot and make it difficult to walk, but the above configuration can prevent these problems.

[0019] Also, when viewed from the side, the front of this moon-shaped core is curved so that it bulges from above toward the front, then curves from there so that it is concave toward the rear, then curves forward again from there, and then slopes linearly or curvedly backward from just above the bottom end toward the bottom end. With this configuration, there are no straight lines on the front side of the moon-shaped core, and it is entirely curved in a curve, so there is no snag when wearing shoes, making it comfortable to wear, and there are no sharp parts, so there is little interference with the upper and damage can be prevented. It can also be made to wrap around the heel and ankle of the foot.

[0020] In addition, when viewed from the side, the front side of this moon-shaped core is formed into a roughly S-shape from the upper end to the lower, most forward end.

[0021] In addition, when viewed from the side, the rear end of the moon-shaped core is curved so that it is recessed from above toward the front and then curved so that it bulges backward from there. With this configuration, the moon-shaped core is shaped to fit closer to the rear side of the person's heel, and can more reliably support the heel.

[0022] In addition, when viewed from the side, the rear end of this moon-shaped core is curved so that it is concave from above toward the front, then curves so that it bulges backward from there, and then curves gently forward from there. With this configuration, the moon-shaped core conforms to the shape of the rear side of the heel and curves gently forward toward the bottom end, so compared to when this configuration is not present, the moon-shaped core has more flexibility in the front-to-back direction when walking, making it easier to walk.

[0023] In addition, when viewed from the side, the rear side of this moon-shaped core is formed into a roughly S-shape from the top end to the bottom end.

[0024] In addition, the frontmost end of this moon-shaped core is rounded when viewed from the side. With this configuration, when the moon-shaped core is attached to footwear, it does not get caught when the shoe is worn, making it comfortable to wear, and because the tip is not sharp, it does not interfere with the upper and prevents damage.

[0025] In addition, the outer periphery of this moon-shaped core is inclined from the inside to the outside in the thickness direction. With this configuration, when the moon-shaped core is attached to footwear, it does not get caught when the shoe is worn, which is more comfortable to wear than if it was cut without any inclination, and there is less interference with the upper, which prevents damage.

[0026] Moreover, in this moon-shaped core, the inclination of the cutout portion is approximately 45 degrees or greater with respect to the horizontal plane. According to this configuration, since the inclination of the cutout portion is approximately 45 degrees or greater, the tip portion is not sharp compared to an angle smaller than 45 degrees, so when the moon-shaped core is attached to footwear, it does not get caught when the shoe is worn, is comfortable to wear, and there is little interference with the upper, preventing damage. Note that, when the inclination of the cutout portion is curved, the angle of the inclination of the cutout portion refers to the angle of the straight line connecting the tip of the lower end and the tip portion slightly above the lower end.

[0027] In addition, in this moon-shaped core, the core mountain portion is formed in a semicircular cross section cut horizontally, and the semicircular cross section of the core mountain portion is shallower than the semicircular cross section of the core main body portion. With this configuration, the core main body portion can hold the heel portion in a wrapping manner, and by making the core mountain portion shallower, it can also be made to wrap the ankle portion.

[0028] In addition, in the portion of this moon-shaped core that curves from above the rear end side of the core mountain to recess forward, the tangent at the rear end lies more horizontally than at an angle of 60 degrees to the horizontal. In the moon-shaped core of Patent Document 1, which extends in a straight line when standing nearly vertically, the foot tends to get caught when putting on or taking off the shoes, making them difficult to put on and take off, and the heel stands up close to the back of the foot when walking, which may interfere with the foot and make it difficult to walk. However, with the above configuration, the tangent at the rear end of the core mountain lies more horizontally than at an angle of 60 degrees to the horizontal, making it easier to put on and take off, and also reducing interference with the foot when walking, making it easier to walk.

[0029] In addition, in the portion of the crest that curves from above the rear end to the front, the tangent at the rear end of the crest is more horizontal than the 45 degree angle with respect to the horizontal. This configuration further reduces interference with the foot when putting on and taking off the shoes and when walking.

[0030] In addition, the dimension from the rear end to the front end of the main body of the core is at least twice as long as the dimension from the rear end to the front end of the core mountain. With this configuration, the dimension from the rear end to the front of the main body of the core is longer, improving the durability of the core against the load applied to it. In addition, the core mountain is not too large and does not get in the way.

[0031] In addition, this moon-shaped core is formed by forming the core body and the core mountain part integrally, and the width of the core body gradually narrows from the bottom to the top, and the core mountain part extends from the top of the core body to the top. With this configuration, the core mountain part bulges on both sides, making it easier to put on the foot and less likely to get caught, making it safer, than when the width is gradually narrowed from the core body. In addition, the connecting parts between the core body and the core mountain part are formed with depressions on both sides, making this part flexible and making it easier to put on the foot.

[0032] In addition, this moon-shaped core is configured such that the core body and the core mountain are integrally formed, a horizontal notch is formed between the core body and the core mountain on the back side, and when the core body is contained in the heel of the footwear, the core mountain is contained in the heel guide extending rearward and upward from the heel, allowing the heel guide to bend relative to the heel. According to this configuration, the horizontal notch is formed on the back side between the core body and the core mountain, allowing the core mountain to bend rearward relative to the core body. This makes it easier for the heel guide to bend relative to the heel, allowing deformation of the heel guide to improve ease of wearing and comfort when walking.

[0033] In addition, this moon-shaped core is configured such that the core body and the core ridge are formed separately, and when the core body is contained in the heel part of the footwear, the core ridge is contained in the heel guide part extending rearward and upward from the heel part, and the heel guide part is configured to be bendable relative to the heel part. With this configuration, the core body and the heel guide part are each separately contained in the heel part, making it possible for the heel guide part to bend relative to the heel part, which allows deformation of the heel guide part and improves ease of putting on and comfort when walking.

[0034] Footwear according to one aspect of the present invention comprises a heel portion and a heel guide portion extending obliquely backward above the heel portion, and the core body portion of the moon-shaped core according to any one of claims 1 to 22 is contained within the heel portion, and the core ridge portion is contained within the heel guide portion. With this configuration, footwear that exhibits the effects of the moon-shaped core described above can be made easy to put on and take off, and easy to walk in.

[0035] The footwear is also characterized in that the heel portion is covered with a reinforcing member made of resin. With this configuration, the heel portion can be reinforced because the reinforcing member is made of resin. In addition, the reinforcing member is made of resin, which contributes to weight reduction.

[0036] This footwear is also characterized by the inclusion of a sponge member around the periphery of the opening where the user inserts their foot. This configuration allows the foot to be inserted smoothly into the shoe. The elasticity of the sponge member also improves the feel of the opening on the foot.

[0037] The footwear is also characterized in that the tip of the heel guide is lower than the front end of the opening. With this configuration, the angle at which the toes are bent when the user puts on the footwear can be made small, making it easier for the user to put on the footwear.

[0038] This footwear is also characterized in that the upper end of the heel guide lies more horizontally than vertically. With this configuration, if the upper end of the heel guide is vertical, it may interfere with the foot when putting on the shoe, but by laying the upper end of the heel guide substantially horizontally, it is possible to prevent interference with the foot. Furthermore, if the upper end of the heel guide is laid flat, the bending angle of the toes can be reduced when putting on the shoe, allowing the foot to be inserted smoothly into the footwear. Effect of the Invention

[0039] The moon-shaped core and footwear equipped with the same of the present invention can be put on smoothly while standing, without bending or sitting, and without using a shoehorn or hands, and the shoes fit the foot well when worn, making it easy to walk. [Brief description of the drawings]

[0040] [Figure 1] 1 is a side view of footwear according to a first embodiment of the present invention. [Diagram 2] FIG. [Diagram 3] 1 is a rear view and a cross-sectional view of a moon-shaped core. [Figure 4] FIG. 2 is a side view of the footwear when worn. [Diagram 5] FIG. 4 is a cross-sectional view showing a sponge member around the periphery of the opening. [Figure 6] FIG. 13 is a side view of footwear showing a modified example of a moon-shaped core. [Figure 7] 11A and 11B are a rear view and a cross-sectional view of a moon-shaped core according to a second embodiment of the present invention. [Figure 8] FIG. 11 is a side view of footwear according to a second embodiment. [Figure 9] FIG. 13 is a side view of footwear showing a modified example of a moon-shaped core. [Figure 10] FIG. 11 is a perspective view of a moon-shaped core according to a third embodiment of the present invention. [Figure 11] FIG. [Figure 12] FIG. [Figure 13]FIG. [Figure 14] FIG. 2 is a side view of the same moon-shaped core attached to footwear. [Figure 15] 13A and 13B are a rear view and a cross-sectional view of a moon-shaped core according to another embodiment. [Figure 16] 13A and 13B are a rear view and a cross-sectional view of a moon-shaped core according to another embodiment. [Figure 17] 13A and 13B are a rear view and a cross-sectional view of a moon-shaped core according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0041] Hereinafter, footwear 1 according to one embodiment of the present invention will be described in detail. Note that the present invention is not limited to this embodiment. Furthermore, the components in the following embodiment include those that are replaceable and easy for a person skilled in the art, or those that are substantially the same. Furthermore, the configurations described below can be combined as appropriate. Also, various omissions, substitutions, or modifications of the configuration can be made without departing from the gist of the present invention.

[0042] First Embodiment

[0043] Fig. 1 is a perspective view of footwear 1 according to this embodiment as seen obliquely from below, and Fig. 2 is a rear view of footwear 1 as seen from the rear. Fig. 3 shows a moon-shaped core 5 according to this embodiment, where Fig. 3(a) is a rear view, Fig. 3(b) is an AA cross-sectional view, and Fig. 3(c) is a BB cross-sectional view.

[0044] As shown in Figs. 1 and 2, footwear 1 comprises a sole 3 constituting the sole of a shoe, and an upper 2 covering the instep, with the upper 2 having a heel portion 4 at its rear end that covers the heel area.

[0045] The sole 3 is made of a relatively hard rubber material or the like, and has a non-slip surface with projections and recesses (not shown). In this embodiment, the sole 3 is made of a rubber material, but it may be made of genuine leather or the like.

[0046] The upper 2 has an upper body 21 that covers the forefoot, part of the midfoot, and the heel of the user, and a tongue 22 that covers part of the midfoot. The tongue 22 is fixed to the upper body 21 by sewing.

[0047] The upper 2 has an opening 23 for inserting the foot, the part in front of the opening 23 receiving the forefoot, and the part behind the opening 23, that is, the heel part 4, supports the heel of the person's foot.

[0048] The heel part 4 contains a moon-shaped core 5, so it does not easily break or collapse, and allows the foot to be inserted smoothly into the footwear.

[0049] The heel portion 4 is covered with a resin reinforcing member 6. This allows the heel portion 4 to be reinforced. In addition, since the reinforcing member 6 is made of resin, it is possible to reduce the weight. In this embodiment, the resin reinforcing member 6 is covered, but it does not have to be covered. In addition, the reinforcing member 6 is made of resin, but is not limited to this.

[0050] The footwear 1 is formed with a heel guide portion 7 extending upward and diagonally backward above the heel portion 4. The heel guide portion 7 is a part of the upper 2, and extends upward and diagonally backward.

[0051] The heel guide 7 has a concave curved shape on the front side. As shown in Fig. 2, the heel guide 7 gradually narrows from the bottom to the top, and the width of the tip of the heel guide 7 is narrower than the width of the base.

[0052] The heel guide portion 7 contains the moon-shaped core 5 and is not easily broken or crushed, allowing the foot to be smoothly inserted into the footwear.

[0053] As shown in Figure 1, the tip height T1 of the heel guide 7 is lower than the front end height T2 of the opening 23. This allows the user to easily put on the shoes since the angle at which the toes are bent can be made smaller.

[0054] Next, the moon-shaped core 5 shown in Fig. 3 will be described. The moon-shaped core 5 consists of a core body portion 51 and a core mountain portion 52 above it. When viewed from the side, the moon-shaped core 5 curves so that the rear end side is concave from above toward the front, then curves so that it bulges backward from there, and then curves further forward from there. This gives the moon-shaped core 5 a shape that fits along the rear side of a person's heel, allowing the heel to be reliably supported.

[0055] In this embodiment, the angle from the rear end side to the part where it curves from the top to the front is steeper than 45 degrees from the horizontal. This allows the foot to be smoothly inserted into the footwear without being damaged even if the foot steps on the moon-shaped core 5 when putting on the footwear.

[0056] Furthermore, the part of the moon-shaped core 5 where the rear end curves downward from above toward the front may be inclined toward the horizontal at an angle of more than 45 degrees (see FIG. 6), which reduces the bending angle of the toes when putting on the shoes and allows the foot to be inserted smoothly into the footwear.

[0057] In addition, when viewed from the side, the front end of the moon-shaped core 5 is curved so that it bulges from the top toward the front, then curves from there toward the rear so that it is concave, and then curves again toward the front, and is inclined linearly from a little above the bottom end toward the rear bottom end. The inclination is linear from slightly above the lower end of the moon-shaped core 5 toward the rear lower end, but it may be curved.

[0058] The cross section of the moon-shaped core 5 cut perpendicular to the horizontal direction at the approximate center in the width direction is formed into a roughly S-shape. The core body 51 is roughly semicircular in rear view. The core body 51 narrows toward the top, and the cross section cut horizontally to wrap around the heel is formed into a semicircular arc shape.

[0059] The core body 51 has cutouts 53 at both front ends of the lower end, which are inclined in a straight line from the lower end diagonally upward toward the front. In this embodiment, the cutouts 53 are provided at both front ends of the lower end, but it is also possible to provide a cutout 53 at only one of them. Also, the cutouts 53 are inclined in a straight line from the lower end diagonally upward toward the front, but they may be inclined in a curved line.

[0060] The core mountain portion 52 is generally rectangular in shape with a concave front side, and extends upward from the upper end at the widthwise middle position of the core main body portion 51, which protrudes forward and curves to correspond to the narrowing at the upper rear side of the heel.

[0061] The core mountain portion 52 is formed in a semicircular arc shape in a cross section cut horizontally, and the semicircular arc shape of the cross section of the core mountain portion 52 is shallower than the semicircular arc shape of the cross section of the core body portion 51. This makes it possible to reliably hold the heel portion.

[0062] The moon-shaped core 5 is made of a relatively hard resin, and is enclosed in the heel portion 4 and the heel guide portion 7. As the resin, thermoplastic resins such as thermoplastic polyurethane, polyamide elastomer, ethylene-vinyl acetate copolymer resin, ABS resin, etc., and thermosetting resins such as epoxy resin and unsaturated polyester resin can be used. In this embodiment, the moon-shaped core 5 is made of resin, but it may be made of thermoplastic rubber, synthetic leather, or natural leather.

[0063] As shown in Figures 4 and 5, the footwear 1 of this embodiment has a sponge member 8 enclosed around the periphery of the opening 23 through which the user's foot is inserted. This allows the foot to be inserted smoothly into the shoe. The elasticity of the sponge member 8 also improves the feel on the foot. Note that, although the sponge member 8 is enclosed around the periphery of the opening 23 in this embodiment, it is not limited to sponge as long as it is elastic.

[0064] The upper end of the heel guide 7 may be laid in a generally horizontal direction as shown in Fig. 6, which prevents interference with the foot when putting on shoes. Also, if the upper end of the heel guide 7 is laid in a horizontal direction, the bending angle of the toes can be reduced when putting on shoes, allowing the foot to be inserted smoothly into the footwear.

[0065] <Second embodiment>

[0066] Next, a second embodiment different from the above embodiment will be described. The main difference from the first embodiment is the structure of the moon-shaped core, so this point will be mainly described. Fig. 7 shows a moon-shaped core 100 according to the second embodiment, where (a) is a rear view, (b) is an AA cross-sectional view, and (c) is a BB cross-sectional view. Fig. 8 is a side view of footwear 1 equipped with the moon-shaped core 100. Note that the same structures as those in the first embodiment are given the same reference numerals.

[0067] When viewed from the side, the rear end of the moon-shaped core 100 curves so that it is recessed from above toward the front, then curves so that it bulges backward from there, and then curves further forward from there. The part of the rear end that curves so that it is recessed from above toward the front lies more horizontally than the moon-shaped core 5 according to the first embodiment.

[0068] When viewed from the side, the moon-shaped core 100 curves so that the front end bulges from above toward the front, then curves so as to sink backward, then curves forward again from there, and slopes linearly from just above the bottom end toward the rear lower end. And the part where the front end curves so as to bulge from above toward the front, then curves so as to sink backward, then curves forward again from there lies more horizontally than the moon-shaped core 5 according to the first embodiment.

[0069] The moon-shaped core 100 comprises a core body 110 and a core mountain 120, and the core body 110 has cutouts 130 at both front ends of the lower end, which slope linearly from the lower end diagonally upward toward the front. In this embodiment, the cutouts 130 are provided at both front ends of the lower end, but it is also possible to have a cutout 130 at only one of them. Also, the cutouts 130 slope linearly from the lower end diagonally upward toward the front, but they may also slope in a curved manner.

[0070] The upper part of the moon-shaped core 100, from the top of the core mountain portion 120 to the part that curves to bulge forward, lies more horizontally than vertically. FIG. 8 shows footwear 1 with the moon-shaped core 100 inside. This configuration prevents interference with the foot when putting on the shoe. Also, if the rear heel part is laid flat, the bending angle of the toes of the foot can be reduced when putting on the shoe, allowing the foot to be inserted smoothly into the footwear.

[0071] Furthermore, the dimension of the moon-shaped core 100 from the rear end to the front end of the core body 110 is more than twice the dimension from the rear end to the front end of the core mountain portion 120. This increases the dimension from the rear end to the front end of the core body 110, improving the moon-shaped core 100's durability against loads applied thereto.

[0072] As shown in FIG. 9, the upper part of the moon-shaped core 100, that is, the core crest 120, can be configured as a core crest 121 that is slightly raised to the vertical side.

[0073] <Third embodiment>

[0074] Next, a third embodiment, which differs from the above embodiments, will be described. The main difference from the first embodiment is the structure of the moon-shaped core, so this will be mainly described. Fig. 10 is a perspective view of the moon-shaped core according to the third embodiment. Fig. 11 is a side view of the moon-shaped core. Fig. 12 is a rear view of the moon-shaped core. Fig. 13 is a top view of the moon-shaped core. Fig. 14 is a side view of the moon-shaped core attached to footwear. Note that structures similar to those in the first embodiment are given the same reference numerals.

[0075] As shown in Figures 10 to 13, the moon-shaped core 200 has a core body 210 and a core mountain 220 above it, which are integrally formed from resin. The core body 210 has a semicircular cross section cut horizontally so as to wrap around the heel, and the core mountain 220 extends upward from the core body 210 and has a semicircular cross section cut horizontally. As shown in Figure 13, the semicircular cross section of the core mountain 220 is shallower than the semicircular cross section of the core body 210 (the semicircular cross section of the rear side of the core mountain 220 has a larger radius of curvature than the semicircular cross section of the rear side of the core body 210).

[0076] As shown in FIG. 11, when viewed from the side, the front side (the left side in FIG. 11) of the moon-shaped core 200 curves so that it bulges forward from above, then curves so that it concaves backward from there, and then curves forward again from there, sloping backward in a straight line or curved shape from slightly above the bottom end toward the bottom end.

[0077] That is, when viewed from the side, the moon-shaped core 200 has a substantially S-shaped front from the upper end to the lower most forward end, and has cutouts at both front ends of the lower end that curve diagonally upward from the lower end. In this embodiment, the cutouts 230 are inclined at an angle of approximately 60 degrees with respect to the horizontal plane. The front most end of the moon-shaped core 200 is rounded.

[0078] In addition, when viewed from the side, the rear end of the moon-shaped core 200 is curved so that it is concave from above toward the front, then curves so that it bulges backward from there, and then curves gently toward the front from there, so that it is formed in an approximately S-shape from the upper end to the lower end.

[0079] In addition, the upper edge of the core mountain 220 of the moon-shaped core 200 is rounded when viewed from the side, and the highest point of the upper edge is forward of the rearmost position of the core mountain 220. In other words, the upper edge of the core mountain 220 is formed on a gentle arc that is convex upward. The upper part of the core mountain 220 from the top to the part that curves to bulge forward lies more horizontally than vertically. In this embodiment, the tangent at the rearmost end of the part that curves to dent forward from the top of the rear end side of the core mountain 220 is formed at an angle of approximately 45 degrees to the horizontal.

[0080] In addition, when viewed from the back of the moon-shaped core 200, the connecting portion between the core body 210 and the core mountain 220 is recessed on both the left and right sides, and the upper part bulges out from the connecting portion on both the left and right sides. In addition, the upper end of the rear end of the core mountain 220 in this embodiment is formed in a substantially straight line, and is formed with rounded left and right sides. The upper end of the rear end of the core mountain 220 may be formed in a downwardly convex arc shape.

[0081] Furthermore, the dimension of the moon-shaped core 200 from the rear end to the front end of the core body 210 is more than twice the dimension of the rear end to the front end of the core mountain 220, and the height dimension of the core mountain 220 is less than 1 / 3 of the overall height dimension of the moon-shaped core 200. Furthermore, the outer peripheral edge of the entire moon-shaped core 200 is formed to be inclined from the inside to the outside in the thickness direction.

[0082] 14 shows the footwear with the moon-shaped core 200 attached. The footwear 1 of this embodiment includes an upper 2, a sole 3, a heel part 4, etc., and has a basic structure similar to that of the first embodiment. In addition, the moon-shaped core 200 is contained in the heel part 4 of the footwear 1, so it does not easily break or collapse, and the foot can be smoothly inserted into the footwear.

[0083] The heel portion 4 is covered with a resin reinforcing member 6. This allows the heel portion 4 to be reinforced. In addition, since the reinforcing member 6 is made of resin, it is possible to reduce the weight. In this embodiment, the resin reinforcing member 6 is covered, but it does not have to be covered. In addition, the reinforcing member 6 is made of resin, but is not limited to this.

[0084] Footwear 1 is formed with a heel guide portion 7 extending diagonally backward above heel portion 4. Heel guide portion 7 is configured as a part of upper 2, and upper 2 as a whole has a shape in which the heel side extends diagonally upward and backward.

[0085] Additionally, the heel portion 4 and the heel guide portion 7 contain a moon-shaped core 200 such that the core body portion 210 is located in the heel portion 4 and the core crest portion 220 is located in the heel guide portion 7. The heel guide portion 7 has a curved shape that is concave on the front side.

[0086] According to the moon-shaped core 200 of this embodiment having the above-mentioned configuration and footwear equipped with it, a heel guide portion extending diagonally backward is provided above the heel portion, which improves ease of putting on, and allows the shoes to be put on while standing without using a shoehorn or hands.

[0087] Furthermore, by providing the moon-shaped core 200 with the cutouts 230 at both front ends, when the foot lands on the ground and the sole is deformed due to compression or the like, the upper side also has room to flex and deform in the direction of the cutouts (toward the front of the shoe), improving the cushioning of the entire shoe and improving comfort.

[0088] In addition, because the inclined portion of this cutout 230 is formed at approximately 60 degrees with respect to the horizontal plane, the tip is not sharp compared to when it is formed at an acute angle, so when the moon-shaped core 200 is attached to footwear, it does not get caught when the shoe is worn, providing a comfortable fit, and there is little interference with the upper, preventing damage. Note that the inclination of the cutout 230 is not limited to 60 degrees, and is preferably an angle of 45 degrees or greater.

[0089] In addition, when viewed from the back, the connecting portion between the core body 210 and the core mountain 220 of this moon-shaped core 200 is recessed on both sides, and the core mountain 220 extending upward from there bulges on both sides, making it easier to put on and less likely to get caught, and safer, than if the width were gradually narrowed from the core body 210. Also, because the connecting portion between the core body 210 and the core mountain 220 is recessed on both sides, this portion has good flexibility, making it easier to put on.

[0090] In addition, the upper part of the moon-shaped core 200, from the top of the core mountain 220 to the part that curves forward to bulge, lies horizontally rather than vertically, making it less likely to get caught when worn, easy to wear, and safe. Also, when walking, the heel guide part 7 containing the core mountain 220 is not located close to the back of the foot, so it is less likely to interfere with the foot and does not hinder walking.

[0091] In addition, the frontmost end of the moon-shaped core 200 is rounded when viewed from the side, so when the moon-shaped core 200 is attached to footwear, it does not get caught when the shoe is worn, making it comfortable to wear, and since the tip is not sharp, it interferes less with the upper and damage can be prevented.

[0092] In addition, since the outer peripheral edge of this moon-shaped core 200 is inclined from the inside to the outside in the thickness direction, when the moon-shaped core is attached to footwear, it does not get caught when the shoe is worn and is comfortable to wear, compared to when it is not inclined and is simply cut off, and there is less interference with the upper, preventing damage.

[0093] In addition, the tangent line at the rear end of the upper part of the rear end side of the core mountain portion 220 of this moon-shaped core 200 is formed at approximately 45 degrees to the horizontal, so it is easy to put on and take off, and there is little interference with the foot when walking. Note that it is preferable that this angle is more horizontal than the angle of approximately 60 degrees.

[0094] Furthermore, with this moon-shaped core 200, the dimension from the rear end to the front end of the core body 210 is more than twice the dimension from the rear end to the front end of the core mountain portion 220, and as the dimension from the rear end to the front of the core body 210 is longer, the moon-shaped core 200 is more resistant to loads and has improved stability.

[0095] <Other embodiments>

[0096] As described above, preferred embodiments of the present invention have been described. However, the present invention is of course not limited to the above-described embodiments, and various modified or altered examples within the scope of the claims also fall within the technical scope of the present invention.

[0097] For example, in the above-described embodiment, the tip height T1 of the heel guide 7 is lower than the front end height T2 of the opening 23, but the tip height T1 of the heel guide 7 may be higher than the front end height T2 of the opening 23. This makes it difficult for the heel guide 7 to be stepped on by the foot when putting on the shoes, and allows the foot to be inserted smoothly into the footwear.

[0098] Also, Fig. 15 shows a moon-shaped core 300 according to another embodiment, and Fig. 16(a) is a rear view, and (b) is a CC cross-sectional view. As shown in Fig. 16, the moon-shaped core 300 has a core body 310 and a core ridge 320 formed integrally, and the width of the core body 310 gradually narrows from the bottom to the top, and the core ridge 320 may extend so as to gradually narrow from the core body 310 upward. This allows the foot to be smoothly guided into the footwear.

[0099] Furthermore, in the embodiment described above, the moon-shaped core 5 is configured such that the core body 51 and the core ridge 52 are smoothly formed as one unit, but it can also be configured as a moon-shaped core 400 in which a horizontal cutout 430 is formed on the back side between the core body 410 and the core ridge 420 (see FIG. 16). In this way, the core body 410 is contained in the heel 4, and the core ridge 420 is contained in the heel guide 7, and the horizontal cutout 440 of the moon-shaped core 400 makes it easier for the heel guide 7 to bend relative to the heel 4, thereby allowing deformation of the heel guide 7 and improving ease of putting on and comfort when walking.

[0100] Furthermore, in the above-described embodiment, the moon-shaped core 5 is formed integrally with the core body 51 and the core ridge 52, but it is also possible to use a moon-shaped core 500 in which the core body 510 and the core ridge 520 are configured as separate bodies. The core body 510 is contained in the heel 4, the core ridge 520 is contained in the heel guide 7, and the heel guide 7 is configured to be bendable relative to the heel 4 (see FIG. 17). As a result, by separately containing the core body 510 in the heel 4 and the core ridge 520 in the heel guide 7, the heel guide 7 is easily bent relative to the heel 4, and deformation of the heel guide 7 is permitted, improving ease of putting on and comfort when walking. [Explanation of symbols]

[0101] 1. Footwear 2. Upper 21 Upper body 22 Tongue 23 Opening 3 Sole 4 Heel May-shaped core 51 Core body 52 Core Mountain 53 Cutout 6 Reinforcing members 7 Heel guide 8 Sponge material 100 moon-shaped core 110 Core body 120 Core Mountain 130 Cutout 200 Moon-shaped core 210 Core body 220 Core Mountain 230 Notch 300 Moon-shaped core 310 Core body 320 Core Mountain 330 Notch 400 Moon-shaped core 410 Core body 420 Core Mountain 430 Notch 440 Notch 500 moon-shaped core 510 Core body 520 Core Mountain 530 Notch

Claims

1. A moon-shaped core used in the heel of footwear. The pen has a core body and a core mountain above the core body. The core body is characterized in that the cross section cut horizontally in a semicircular arc shape so as to wrap around the heel, and has a cutout at both front ends of the lower end that is inclined linearly or curvedly from the lower end to the front and upward. Moon-shaped core.

2. The core body portion and the core mountain portion are integrally formed, When viewed from the back, the core mountain portion extends upward from the core body portion and has a width narrower than that of the core body portion. The moon-shaped core according to claim 1.

3. When viewed from the back, the connecting portion between the core body portion and the core mountain portion is recessed on both the left and right sides, and the upper portion from the connecting portion bulges on both the left and right sides. The moon-shaped core according to claim 1.

4. When viewed from the back, the upper end of the rear end of the core portion is approximately linear or has a downwardly convex arc shape, and the left and right sides are rounded. The moon-shaped core according to claim 1.

5. When viewed from the side, the upper edge of the core portion is rounded, and the highest point of the upper edge is forward of the rear end of the core portion. The moon-shaped core according to claim 1.

6. The upper portion of the core portion from the top to the curved portion that bulges forward lies more horizontally than vertically. The moon-shaped core according to claim 1.

7. When viewed from the side, the front curves upward and forward, then curves downward and concavely, then curves forward again, and then slopes backward in a straight or curved line from just above the bottom end to the bottom end. The moon-shaped core according to claim 1.

8. When viewed from the side, the front side is formed in a roughly S-shape from the upper end to the lower most forward end. The moon-shaped core according to claim 1.

9. When viewed from the side, the rear end curves downward from above toward the front, then curves upward toward the rear. The moon-shaped core according to claim 1.

10. When viewed from the side, the rear end curves downward from above toward the front, then curves upward toward the rear, and then curves gently toward the front. The moon-shaped core according to claim 1.

11. When viewed from the side, the rear side is formed in a roughly S-shape from the top to the bottom. The moon-shaped core according to claim 1.

12. When viewed from the side, the frontmost end is rounded. The moon-shaped core according to claim 1.

13. The outer edge is inclined from the inside to the outside in the thickness direction. The moon-shaped core according to claim 1.

14. The inclination of the cutout portion is at an angle of approximately 45 degrees or greater with respect to the horizontal plane. The moon-shaped core according to claim 1.

15. The core portion is The horizontal cross section is formed in a semicircular arc shape. The semicircular arc shape of the cross section of the core mountain portion is shallower than the semicircular arc shape of the cross section of the core body portion. The moon-shaped core according to claim 1.

16. In the portion of the core portion that is curved so as to be recessed from the upper side toward the front, a tangent line at the rear end of the core portion is laid toward the horizontal side at an angle of more than 60 degrees with respect to the horizontal. The moon-shaped core according to claim 1.

17. In the portion of the core portion that is curved so as to be recessed from the upper side toward the front, a tangent line at the rear end of the core portion is laid toward the horizontal side at an angle of more than 45 degrees with respect to the horizontal. The moon-shaped core according to claim 1.

18. The dimension from the rear end to the front end of the core body portion is at least twice the dimension from the rear end to the front end of the core mountain portion. The moon-shaped core according to claim 1.

19. The height dimension of the core mountain portion is 1 / 3 or less of the height dimension of the entire moon-shaped core. The moon-shaped core according to claim 1.

20. The core body portion and the core mountain portion are integrally formed, The width of the core body portion gradually narrows from the bottom to the top, and the core mountain portion extends from the top of the core body portion to the top. The moon-shaped core according to claim 1.

21. The core body portion and the core mountain portion are integrally molded from resin. The moon-shaped core according to claim 2.

22. The core body portion and the core mountain portion are integrally formed, A horizontal notch is formed on the rear side between the core body portion and the core mountain portion, When the core body portion is contained in the heel portion of the footwear, the core mountain portion is contained in a heel guide portion extending rearward and upward from the heel portion, and is configured to allow the heel guide portion to bend relative to the heel portion. The moon-shaped core according to claim 1.

23. The core body portion and the core mountain portion are formed separately, When the core body portion is contained in the heel portion of the footwear, the core mountain portion is contained in a heel guide portion extending rearward and upward from the heel portion, and the heel guide portion is configured to be bendable relative to the heel portion. The moon-shaped core according to claim 1.

24. The shoe has a heel portion and a heel guide portion extending obliquely rearward above the heel portion, Footwear, characterized in that the core body portion of the moon-shaped core according to any one of claims 1 to 23 is contained within the heel portion, and the core ridge portion is contained within the heel guide portion.

25. The heel portion is covered with a resin reinforcing member.

25. Footwear according to claim 24.

26. A sponge member is enclosed in the periphery of the opening into which the user's foot is inserted.

25. Footwear according to claim 24.

27. The tip height of the heel guide portion is located below the front end height of the opening.

25. Footwear according to claim 24.

28. The upper end of the heel guide portion is positioned more horizontally than vertically.

25. Footwear according to claim 24.

Images