slippers

Abstract

To provide slippers having an insole containing a multi-layered inner material, giving a comfortable feel when worn and a moderate resilience when walking, and providing comfortable wearing and walking comfort. [Solution] A slipper 100 consisting of a sole portion 2 that supports the sole of the foot and an upper portion 1 that stands up from both ends of the sole portion and covers the instep. The sole portion has a bottom surface 23 provided on the surface that contacts the floor, a sole surface layer 21 having a surface that contacts the sole of the foot, and a cushion layer 22 surrounded by the bottom surface and the sole surface layer. The cushion layer comprises an EVA layer 22c made of EVA material, a second urethane layer 22b laminated on the EVA layer, and a first urethane layer 22a laminated on the second urethane layer and having a lower hardness than the second urethane layer.

Description

[Technical field]

[0001] The present invention relates to slippers having an insole containing a multi-layered inner material, which provides a comfortable feel when worn and an appropriate resilience on the soles of the feet when walking, allowing for comfortable walking. [Background technology]

[0002] Slippers are simple footwear consisting of a sole that supports the sole of the foot and an upper that covers the top of the foot, and can be worn casually indoors, on a balcony, etc. Slippers often only cover the top of the foot and leave the heel open, making them casual to wear, but they also have problems such as being uncomfortable to wear and making it difficult to walk in. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Utility Model Registration No. 3242196 Summary of the Invention [Problem to be solved by the invention]

[0004] The slippers of Patent Document 1 are slippers that have multiple ventilation holes near the sides and front of the upper part, improving breathability and providing a comfortable fit. The slippers of Patent Document 1 have multiple ventilation holes in the sole part, which allows moisture to be discharged from the space surrounded by the upper part and the sole part, improving ventilation performance. However, since moisture emitted from the sole of the foot that is in close contact with the sole part is trapped inside the sole part, it cannot be said that the slippers are completely comfortable to wear. In addition, since the sole of the foot is in close contact with the sole part, moisture seeps into the sole part, gradually losing the cushioning properties of the sole part, and impacts when walking are directly applied to the sole of the foot, making the feet more likely to hurt or get tired.

[0005] This invention provides slippers that have an insole containing a multi-layered inner material, and are highly breathable. The inner material has air holes, and multiple sheet layers with different hardness are provided. The cushion layer in the sole absorbs shocks when walking, reduces the load on the soles of the feet, and gently wraps around the feet, allowing for comfortable walking. [Means for solving the problem]

[0006] The slippers of the present invention are slippers consisting of a sole portion that supports the sole of the foot and an upper portion that stands up from both ends of the sole portion and covers the instep, the sole portion having a bottom surface that is in contact with the floor, a sole upper surface having a surface that comes into contact with the sole of the foot, and a cushioning layer surrounded by the bottom surface and the sole upper surface, the cushioning layer comprising an EVA layer made of EVA material, a second urethane layer laminated on the EVA layer, and a first urethane layer laminated on the second urethane layer and having a lower hardness than the second urethane layer.

[0007] According to this invention, a sole part with appropriate cushioning can be obtained by providing a cushioning layer including an EVA layer made of EVA material, a second urethane layer laminated on the EVA layer, and a first urethane layer laminated on the second urethane layer and having a lower hardness than the second urethane layer. When the slippers are worn, the cushioning layer of the sole part absorbs shocks applied to the soles of the feet when walking, reduces stress on the feet, and softly wraps the feet, making the slippers easy to walk in and comfortable to wear.

[0008] The first urethane layer of the slippers of the present invention is characterized by having air holes.

[0009] According to this invention, the first urethane layer having air holes is enclosed in the sole, so that the impact on the sole of the foot can be reduced when walking in the slippers. That is, air enters and leaves the air holes, and the speed at which the sole of the foot sinks is slowed down by the air friction, and the impact on the sole of the foot is reduced. In addition, the cushion layer in the sole softly wraps around the foot, so that the slippers can be made so that the feet do not get tired when walking and the feet can walk rhythmically and comfortably. [Brief description of the drawings]

[0010] [Figure 1] 1 is a plan view showing a slipper according to a first embodiment of the present invention. [Diagram 2] 1 is a right side view showing a slipper according to a first embodiment of the present invention. FIG. [Diagram 3] 1 is a schematic diagram for explaining the internal structure of a sole portion of a slipper according to a first embodiment of the present invention. FIG. [Figure 4] 1 is an explanatory diagram for explaining the internal structure of a sole portion of a slipper according to a first embodiment of the present invention; [Diagram 5] FIG. 2 is a reference diagram showing the use of the slippers according to the first embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] The best mode for carrying out the invention will now be described with reference to the accompanying drawings.

[0012] (Embodiment 1) Fig. 1 is a plan view showing the slipper 100 according to the first embodiment of the present invention, and Fig. 2 is a right side view. Fig. 3 is a schematic diagram for explaining the internal structure of the sole part of the slipper 100 according to the first embodiment of the present invention, and Fig. 4 is an explanatory diagram. Fig. 5 is a reference diagram showing the slipper 100 according to the first embodiment of the present invention in use.

[0013] As shown in FIG. 1, the slipper 100 according to the first embodiment of the present invention mainly comprises a sole part 2 that supports the sole of the foot, and an upper part 1 that stands up from both ends of the sole part 2 and covers the instep of the foot. The slipper 100 according to the first embodiment of the present invention is a type in which the tip of the upper part is open on the toe side, but the tip of the toe side is not open and the slipper may have a bag-shaped upper part 1. As shown in FIG. 2, the slipper 100 according to the first embodiment of the present invention has a thick sole part 2, making it a slipper 100 with excellent cushioning. When wearing the slipper 100, the sole of the foot is in close contact with the sole part 2, so if the sole part 2 is thick, the sole 2 is likely to accumulate moisture, and the moisture is trapped in the space surrounded by the sole part 2 and the upper part 1, making it easy to become stuffy. However, as shown in FIG. 3, the inside of the sole part 2 of the slipper 100 according to the present invention has a multi-layer structure, which is highly breathable and easily discharges moisture.

[0014] As shown in FIG. 3, the sole 2 has a multi-layer structure and is made up of three layers: a bottom surface 23 provided on the bottom layer in contact with the floor surface, a sole surface layer 21 provided on the top layer in contact with the sole of the foot, and a cushion layer 22 provided between the bottom surface 23 and the sole surface layer 21. The bottom surface 23 is an outsole made of EVA material. In the first embodiment, the sole surface layer 21 is made up of three sheets, a fabric 21a, a urethane sheet 21b, and a gauze 21c, which are provided in this order from the side closest to the surface that contacts the sole of the foot. The fabric 21a, which is the top layer of the sole surface layer 21, determines the feel of the part that contacts the sole of the foot, so it is desirable to use a cloth fabric or the like that is pleasant to the touch. In addition to cloth fabric, sheets of nonwoven fabric, leather fabric, resin sheets, or other materials may also be used. Furthermore, in the first embodiment, three sheets made of different materials, fabric 21a, urethane sheet 21b, and gauze 21c, are used, but the mask may be made of one or more sheets made of a single material.

[0015] As shown in FIG. 4, a cushion layer 22 is provided between the sole surface layer 21 and the bottom surface 23. The cushion layer 22 is made of a first urethane layer 22a, a second urethane layer 22b, and an EVA layer 22c. These layers are stacked in the order of the first urethane layer 22a, the second urethane layer 22b, and the EVA layer 22c from the side closest to the surface that contacts the sole of the foot. The first urethane layer 22a and the second urethane layer 22b are made of urethane foam. Urethane foam has excellent elasticity, high strength, and a wide range of hardness. The first urethane layer 22a and the second urethane layer 22b are made of urethane foam with different hardness. The hardness of the first urethane layer 22a is lower than that of the second urethane layer 22b.

[0016] The urethane foam used in the first urethane layer 22a and the second urethane layer 22b is a foam body (sponge) containing air bubbles, and has an open-cell structure in which the air bubbles are continuous. The open-cell structure of the urethane foam is highly breathable. In addition, when air passes through the air bubbles, airflow resistance is generated, so that the load on the urethane foam is reduced, shock is cushioned, and a soft feel and comfort can be achieved. The EVA layer 22c provided under the first urethane layer 22a and the second urethane layer 22b is made of an EVA material that is harder than the first urethane layer 22a and the second urethane layer 22b, and therefore plays a role in firmly absorbing the load and shock. By providing the cushion layer 22 consisting of the first urethane layer 22a, the second urethane layer 22b, and the EVA layer 22c, the slipper 100 provides a comfortable feel when worn, and cushions the shock on the sole of the foot when walking, resulting in a slipper 100 that does not apply a load to the sole of the foot, is less tiring, and provides a comfortable walking experience.

[0017] The cushion layer 22 has layers of two different materials, EVA and urethane, and the layer of urethane has two layers with different hardness. By having at least three layers, an EVA layer, a high-hardness urethane foam layer, and a low-hardness urethane foam layer, the slippers 100 can be made to have high cushioning and a soft feel. As shown in FIG. 4, the cushion layer 22 has a plurality of urethane foam layers through which the air K can easily enter and exit. When the air K enters and leaves the cushion layer 22, a ventilation resistance is generated, and the cushion layer 22 slowly sinks. As shown in FIG. 5, when the cushion layer 22 is subjected to a load from the sole of the foot, the cushion layer 22 reduces the load and absorbs the impact, so that the slippers 100 can be made to have a low burden on the foot.

[0018] The cushion layer 22 of the slipper 100 according to the first embodiment of the present invention is composed of a first urethane layer 22a provided at the top, a second urethane layer 22b provided below that, and an EVA layer 22c provided at the bottom. The first urethane layer 22a provided on the side closest to the sole of the foot has a lower hardness and a softer structure than the second urethane layer 22b provided below, and is provided with multiple air holes (holes).

[0019] The first urethane layer 22a has a large amount of air flowing in and out due to a plurality of air holes and a soft and elastic urethane foam material, and furthermore, the first urethane layer 22a has a plurality of air holes (holes) that serve as air passages, and has a large contact area with the air. The first urethane layer 22a slowly sinks when a load is applied due to the ventilation resistance when air enters and exits, and has a high effect of mitigating impact. The second urethane layer 22b is made of a harder urethane foam material that is harder than the first urethane layer 22a. The second urethane layer 22b is harder than the first urethane layer 22a, so there are fewer air bubbles that serve as air passages. When the air that has passed through the first urethane layer 22a passes through the second urethane layer 22b, the air passage becomes narrower and the ventilation resistance becomes larger, so that when the weight of the sole of the foot is applied, the impact can be effectively mitigated. The EVA layer 22c provided under the first urethane layer 22b is made of EVA material, which is harder than urethane material. As a result, the air that passes through the first urethane layer 22a and the second urethane layer 22b remains there or passes through in extremely small amounts, thereby further increasing the airflow resistance and maximizing the impact absorbing effect.

[0020] The difference in hardness between the first urethane layer 22a and the second urethane layer 22b may be 10 to 30 degrees when measured using a type C tester (durometer) based on JIS K7312. Desirably, the hardness of the first urethane layer 22a measured as above is about 18 to 22 degrees lower than the hardness of the second urethane layer 22b. By using materials with different hardness, i.e., layers of two types of urethane foam material with different amounts of air bubbles, for the first urethane layer 22a and the second urethane layer 22b, a cushioning layer 22 optimal for walking is formed inside the sole portion 2.

[0021] In the first embodiment, the slippers 100 have the sole portion 2 having the cushion layer 22, but the configuration of the present invention may be used for sandals, room shoes, and shoes for outdoor wear other than slippers. [Explanation of symbols]

[0022] 100 Slippers 1 Upper part 2 Sole 21 Sole surface layer 21a Fabric 21b Urethane sheet 21c Gauze 22 Cushion layer 22a First urethane layer 22b Second urethane layer 22c EVA layer 23 Bottom F foot K Air

Claims

1. A slipper comprising a sole part supporting the sole of the foot and an upper part standing on both ends of the sole part and covering the instep, The sole portion has a bottom surface provided on a surface in contact with a floor, a sole surface layer having a surface in contact with a sole of a foot, and a cushion layer surrounded by the bottom surface and the sole surface layer, The slippers are characterized in that the cushion layer comprises an EVA layer made of EVA material, a second urethane layer laminated on the EVA layer, and a first urethane layer laminated on the second urethane layer and having a hardness lower than that of the second urethane layer.

2. The slippers according to claim 1, wherein the first urethane layer has air holes.

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