JP3199896U - slipper - Google Patents

Abstract

[PROBLEMS] By adopting a core material provided with unevenness to efficiently support the sole and a structure in which the core material is sewn so as to be wrapped with cloth or other sheet-like material, the manufacturing process is reduced and the cost is relatively low. Providing slippers that fit on the soles of the feet and support the walking posture while being restrained, and are comfortable and comfortable to wear even when walking for a long time. An upper portion having a size that covers at least the upper half of the instep and having an opening on a toe side when the foot is inserted, and an insole made of cloth, leather or other sheet-like material The insole is a bulge that is raised on the center outer side of the upper surface of the insole, and a bulge that is higher than the cuboid bone holding portion provided near the center inner side of the upper surface of the insole. There is a certain arch holding part, and the gap between the cubic bone holding part and the arch holding part is recessed low. [Selection] Figure 1

Description

  This device is equipped with a three-dimensional sole that matches the shape of the sole, supports the arch and the part where the cubic bone hits, and fits well on the sole, making it difficult to get tired even if standing or walking for a long time, It relates to slippers that are comfortable to wear.

Conventionally, the slippers generally used have an upper, an insole, an insole and a sole, which are integrated by sewing or bonding, and are of an external sewing type or a hanging type. It is manufactured. In these slippers, the insole portion with which the sole contacts is often flat. A flat insole allows you to insert your foot smoothly into the slipper, but the slipper may slip off when you walk, so wear a flat insole slipper. When walking, it is easy to get tired if you walk for a long time, unconsciously walking with a force on your toes so as not to take off. Also, the comfort was not comfortable.

Therefore, various slippers have been devised in order to improve those problems, the fit to the sole and the comfort. The slipper of Patent Document 1 is made of urethane foam having a JIS standard hardness of 60 to 66 degrees on the bottom, and has a foot-shaped recess formed on the top surface of the bottom so that it fits the sole. Yes. In addition, the slipper of Patent Document 2 is provided with a core material, a sponge is provided on the top of the cloth, and a cloth is applied from the top in order to fit the sole of the foot, make it easy to walk and improve comfort. It is structured to cover with.

However, since the slipper of Patent Document 1 uses foamed urethane as the material of the bottom, the cost of the material is high, the manufacturing process is complicated, the equipment cost and labor cost are high, and the manufacturing cost is high. . Further, the slipper of Patent Document 2 has a complicated multilayer structure of a core material, a sponge, and two kinds of cloths, and again, there are many manufacturing processes, and raw materials and manufacturing costs are high.
JP-A-6-121702 Japanese Utility Model Publication No. 7-287

  Therefore, in view of the above circumstances, the present invention adopts a core material provided with unevenness to efficiently support the sole and a structure in which the core material is sewn so as to be wrapped with a cloth or other sheet-like material, thereby producing a manufacturing process. There are few slippers that keep the costs relatively low, fit the soles of the feet, and support the walking posture effectively.

  The slipper of the present invention has a size that covers at least the upper half of the instep of the foot, an upper portion having an opening on the side that becomes the toe side when the foot is inserted, and cloth or leather or other sheet-like material. A sole portion wrapped around the insole and sewed, wherein the insole is a cuboid bone holding portion which is a bulge provided on the center outer side of the insole upper surface and the cuboid bone holding portion provided near the center inner side of the insole upper surface It has an arch holding part which is a higher bulge, and the gap between the cubic bone holding part and the arch holding part is low and recessed.

According to this device, the ridge of the cubic bone holding part supports the cubic bone part of the sole, and the bulge of the arch holding part fits the arch of the sole, In order to support, the slippers do not slide off from the feet during walking, no extra force is applied to the toes, and the feet are not tired even if walking for a long time. In addition, since the arch portion and the cubic bone portion of the sole are supported from below, a comfortable wearing feeling can be obtained.

Further, the upper of the slipper of the present invention has a right cover part and a left cover part which are integrally provided on the left and right sides, and the boundary line between the right cover part and the left cover part has a boundary line in the middle. Characterized in that it has a stitched portion that is a stitch formed by stitching the left and right ends of an elongated opening provided along the seam, and the seam curve of the stitched portion is a curve along the upper surface of the instep. To do.

  According to this device, since the upper fits the curve of the instep, a comfortable comfort can be provided. Also, if the upper member has a structure in which an opening is provided in the central portion of one sheet and the left and right are sewn together, the manufacturing process can be reduced because the number of members is smaller than the structure in which the two upper members are sewn side by side. Also, there is no need for pattern matching of the left and right members, and manufacturing is simple.

  Further, the sole portion of the present invention is characterized in that the tip of the toe side is warped upward to form a toe spring.

  According to this device, the space between the tip of the sole and the floor creates a space between the tip of the sole and the floor so that the tip of the sole does not easily get caught on the ground. It can be prevented from getting stuck and taking off.

  The sole portion of the present invention is characterized in that the upper corner of the cross-sectional shape of the heel side tip is an acute angle.

  According to this device, the heel side of the sole bottom is slightly warped upward, so that the landing of the heel is stable during walking, the operation of kicking the floor is smooth, easy to walk, and fatigue due to walking is minimized. Become.

  Further, the sole portion of the present invention is characterized in that the tip of the heel side is thicker than the tip of the toe side.

  According to this device, the thickness of the tip of the heel side of the sole part of the slipper is thicker than the toe side, so that the center of gravity can be moved quickly when walking, and a light walk can be performed for a long time. You can expect to be tired even if you walk.

It is a perspective view of the slipper 100 concerning Embodiment 1 of this invention. (A) is a front view of the right leg slipper 101 of the slipper 100 shown in FIG. 1, and (b) is a developed view of the upper portion 1 before sewing. It is a right view of the slipper 101 for right feet of the slipper 100 shown in FIG. It is a left view of the slipper 101 for right feet of the slipper 100 shown in FIG. It is a bottom view of the slipper 101 for right feet of the slipper 100 shown in FIG. It is a front view of the slipper 100 shown in FIG. It is a rear view of the slipper 100 shown in FIG. It is a top view of the insole 3 of the slipper 101 for right feet of the slipper 100 shown in FIG. FIG. 9 is a plan reference view of the insole 3 of the slipper 100 shown in FIG. 8. It is AA sectional drawing of the insole 3 shown in FIG. It is BB sectional drawing of the insole 3 shown in FIG. It is CC sectional drawing of the insole 3 shown in FIG. It is DD sectional drawing of the insole 3 shown in FIG. It is a perspective view of the insole 3 shown in FIG. It is a perspective view of the insole 3 shown in FIG. It is a reference drawing of the sole showing which part of the sole the arch holding part 22 and the cubic bone holding part 23 of the sole part 2 of the slipper 100 shown in FIG. FIG. 2 is a reference diagram illustrating a state in which the slipper 100 illustrated in FIG. 1 is used. It is a perspective view of the slipper 200 concerning Embodiment 2 of this invention. It is a right view of the slipper 201 for right feet of the slipper 200 shown in FIG. It is a bottom view of the slipper 200 shown in FIG.

Hereinafter, the best mode for carrying out the present invention will be described for each embodiment.

(Embodiment 1)
FIG. 1 is a perspective view of a slipper 100 according to Embodiment 1 of the present invention. 2 is a right side view of the slipper 100 shown in FIG. 1, FIG. 3 (a) is a front view of the slipper 100 shown in FIG. 1, and FIG. 3 (b) is shown in FIG. FIG. 6 is a development view of the upper part of the slipper 100 before sewing. . 4 is a left side view of the slipper 100 shown in FIG. 1, and FIG. 5 is a bottom view of the slipper 100 shown in FIG. 6 is a front view of the slipper 100 shown in FIG. 1, and FIG. 7 is a rear view of the slipper 100 shown in FIG.

As shown in FIG. 1, a slipper 100 according to Embodiment 1 of the present invention includes a right foot slipper 101 and a left foot slipper 102, which are provided on the upper side of the sole portion 2 and the sole portion 2 on which the foot is placed, respectively. The upper part 1 is mainly included. An insole 3 is included inside the sole portion 2.

  General slippers have exactly the same shape for right and left feet, and are often symmetrical elliptical shapes, and can be worn even if left and right are reversed. The slipper 100 of 1 is not the same shape for the right foot and the left foot, but has a mirror image symmetrical shape and cannot be used in the left-right direction. The slipper 100 according to the first embodiment is provided with irregularities along the shape of the sole on the upper surface of the sole portion 2, and irregularities having different sizes on the inside and outside of the foot, respectively. It is designed to fit snugly.

As shown in FIG. 2A, a substantially linear stitching portion 13 is provided in the center of the upper portion 1 from the foot insertion portion 15 toward the distal end opening portion 14. The developed view of the upper portion 1 before sewing is a fan shape made of a single sheet-like cloth or leather cloth, as shown in FIG. 2 (b). In the center of the fan shape, an elongated opening is provided from the foot insertion portion 15 toward the distal end opening portion 14. The stitched portion 13 is formed by fitting the stitched portion right end edge 13a and the stitched portion left end edge 13b, which are both ends of the opening, together.

The upper portion 1 is composed of a single member, and the portions to be sewn are only the portions of the stitching portion right end edge 13a and the stitching portion left end edge 13b. Since the stitching portion right end edge 13a and the stitching portion left end edge 13b are openings provided in the vicinity of the center of the upper portion 1, misalignment is unlikely to occur when stitching, and the sewing work is easy and easy. Can form a shape along the instep curve. In general, in order to create an upper that matches the curve of the instep, the left and right members are prepared separately and the left and right members are sewn so that the boundary is in the center. If separate members are prepared, careful attention is required for alignment in order to sew the ends closely together, which increases the difficulty of the work process. In addition, when using patterned fabrics for the upper part 1, it is necessary to pay attention to pattern matching, which is a finer work, and there are many unnecessary pieces to take the mold of the upper part 1 from the fabric. It is uneconomical. Since the upper part 1 of the slipper 100 of the present invention can be formed from a single piece of material, it does not cause the trouble of pattern matching and an unnecessary piece, and it is easily at low cost and is in the curve of the instep. The upper part 1 can be created.

As shown in FIG. 3, in the slipper 101 for the right foot of the slipper 100 of the present invention, the thickness of the center portion of the side inner portion 27 that is the inner side surface of the foot is thicker than the thickness on the toe side and the heel side. It has become. The upper surface of the sole portion 2 of the slipper 100 of the present invention, that is, the portion where the sole touches, is provided with irregularities according to the shape of the sole, and the vicinity of the center of the sole portion 2 is particularly thick. This is because the portion corresponding to the arch on the inside is greatly raised, and the thickness of the sole portion 2 of the portion is thicker than the surrounding area. The sole portion 2 is sewn by wrapping an insole 3 as a core material with a sheet-like material such as fabric or leather fabric, and a side inner side stitching portion which is a seam of the sewing is provided on a side inner portion 27 of the sole portion 2. 28 is provided. The slipper 100 of the present invention has a thicker sole portion 2 than a conventional slipper, which reduces the impact on the foot during walking, provides a sense of stability and is comfortable to wear. It is a feature.

Further, the sole portion 2 of the slipper 100 of the present invention is provided with an appropriate toe spring at the toe, and a space is created between the floor and the tip of the toe, making it easy to walk and to trip. The angle a formed between the bottom surface of the tip of the toe of the sole portion 2 and the floor is preferably between 10 degrees and 20 degrees, and is optimally around 20 degrees. By providing an appropriate toe spring, it is easy to kick the foot, the center of gravity moves smoothly, and the effect of stabilizing the landing on the heel can be expected.

Furthermore, the cross-sectional shape of the heel side tip of the sole part 2 has an acute angle on the upper side and an obtuse angle on the lower side. That is, the angle b formed by the side in the height direction of the cross-sectional shape at the heel side tip of the sole portion 2 and the floor surface is an angle smaller than 90 degrees. The angle b formed by the side in the height direction of the cross-sectional shape at the tip of the heel side of the sole portion 2 and the floor surface is preferably 60 degrees to 80 degrees, and the optimum angle is around 70 degrees.

  As shown in FIG. 4, the slipper 100 for the right foot of the slipper 100 of the present invention is a left side view, the thickness of the side outer side portion 29 of the sole portion 2 that is the outer side surface of the foot is the thickness of the tip of the toe, It is thicker than the thickness. The thickness of the central portion of the side surface outer portion 29 is also slightly thicker than the surroundings, but not as much as the central portion of the inner side surface portion 27. Moreover, the tip of the toe side of the sole portion 2 is slightly warped upward, and an appropriate toe spring is provided.

As shown in FIG. 5, the bottom surface 26 of the sole portion 2 has a shape that is slightly larger than the sole. Further, the area of the toe side half of the bottom surface 26 is larger than the area of the toe side half. The material used for the bottom surface 26 is preferably a cloth material that does not damage the floor surface and is not slippery for indoor use. A fabric with non-slip rubber partially applied or leather fabric is used. It may be a rubber material.

As shown in FIG. 6, the slipper 100 for the right foot and the slipper 102 for the left foot of the slipper 100 have a mirror image symmetrical shape. As seen from the front, the upper portion 1 is provided with the tip opening portion 14, and therefore, the portion corresponding to the tip of the foot does not have the upper portion 1 and the ventilation is good. Further, the surface of the sole portion 2 that is in contact with the sole of the sole is provided with a bulge at a portion of the foot that is in contact with the arch and serves as an arch holding portion 22 that supports the arch. Further, a bulge is provided on a portion of the upper surface of the sole portion 2 near the center of the outer side of the foot where the cubic bone of the sole hits, thereby forming a cubic bone holding portion 23.

The size of the bulge of the cubic bone holding part 23 is a bulge that is smaller than the arch holding part 22. Cubic bone is a cube-shaped bone between the ribs and the 4th and 5th metatarsal bones. It is outside the middle of the sole, and it is confirmed that there is no bulge on the sole appearance. Although it is in a place where it is difficult to hold, holding and supporting this part with the cubic bone of the sole from the bottom is very effective in correcting the walking posture. By supporting a certain part of the cubic bone from below with a moderate force by the cubic bone holding part 23 of the sole part 2, it is possible to walk with a posture with a slight center of gravity on the back as compared with walking with bare feet. Become. When walking barefoot, the center of gravity shifts from the front, and when kicking the foot, the center of gravity is applied to the heel, but when walking with the slipper 100 of the present invention, the center of gravity moves from behind, When kicking, the center of gravity is not applied to the heel and the center of gravity balance between the toes and the heel is improved.

As shown in FIG. 7, in the sole portion 2 of the slipper 100, the thickness at the heel side tip is thicker than the thickness at the toe side tip. By thickening the sole portion 2 on the heel side, the heel can be securely protected and the impact on the heel can be reduced during walking. Further, the foot insertion portion 15 of the upper portion 1 forms a space that has substantially the same size or a slight margin. Since the foot insertion part 15 secures a moderately sized space, the foot can be inserted smoothly, and when walking, the arch holding part 22 and the cubic bone holding part 23 of the sole part 2 are It fits on the sole of the foot and firmly wraps the foot in the gap between the upper portion 1 and the sole portion 2 so that it is difficult to take off and can provide a comfortable comfort.

Next, the insole 3 included in the sole part 2 of the slipper 100 will be described.

8 is a plan view of the insole 3 of the slipper 100 shown in FIG. 1, and FIG. 9 is a reference plan view of the insole 3 of the slipper 100 shown in FIG. 10 is a cross-sectional view taken along line AA of the insole 3 of the slipper 100 shown in FIG. 8, and FIG. 11 is a cross-sectional view taken along line BB of the insole 3 of the slipper 100 shown in FIG. 12 is a CC cross-sectional view of the insole 3 of the slipper 100 shown in FIG. 8, and FIG. 13 is a DD cross-sectional view of the insole 3 of the slipper 100 shown in FIG. 14 and 15 are perspective views of the insole 3 of the slipper 100 shown in FIG.

As shown in FIG. 8, the insole 3 included in the sole part 2 of the slipper 100 has a sandals shape that is slightly larger than the foot shape. The insole 3 in FIGS. 8 to 13 is the insole 3 of the slipper 101 for the right foot. A convex portion is provided at a portion where the toe hits, and a toe guide 35 is provided. The insole 3 is preferably made of a hard material that can ensure strength.

As shown in FIG. 9, the insole 3 is not flat, but the arch holding part 32 that is a part against the arch and the cubic bone holding part 33 that is a part against the cubic bone on the sole are raised and provided with a bulge. ing. The height of the ridge is higher in the arch holding part 32 than in the cubic bone holding part 33. Also, the arch holding part 32 is wider than the cubic bone holding part 33 in the range of the bulge.

As shown in FIG. 10, the insole 3 has a cross-sectional view with high ends and a low center. The insole 3 of FIG. 10 is the insole 3 of the slipper 101 for the right foot, so that the cubic bone holding part 33 is on the right side and the arch holding part 32 is on the left side when viewed from the AA cross section. The height of the left end tip, that is, the end of the arch holding portion 32 is higher than the height of the right end tip, that is, the end of the cubic bone holding portion 33. The arch holding portion 32 and the cubic bone holding portion 33 are recessed low.

As shown in FIG. 11, the insole 3 has a BB cross-sectional view, that is, a cross-sectional view close to the outside of the foot, and the insole 3 has a bowl shape in which both ends are high and the middle is recessed. The cubic bone holding part 33 which is a small and high bulge is provided at the center of the dent portion. Further, at both ends of the insole 3, the height of the tip closer to the heel side is higher than the height of the tip of the toe side. Furthermore, the angle of rising of the heel side tip of the insole 3, that is, the angle c formed by the floor surface and the heel side tip 34 is about 70 degrees. The angle formed by the floor surface and the heel-side tip 34 is preferably an acute angle rather than 90 degrees, and is preferably between 60 degrees and 80 degrees. The optimum angle is around 70 degrees.

As shown in FIG. 12, the CC cross section of the insole 3, that is, the cross section of the center portion of the foot has a bowl shape in which both ends are high and the middle is recessed. The portions other than both ends are substantially flat, but the central portion is slightly recessed. The tip of the toe side is slightly warped upward to form a toe spring. Further, the rising angle of the heel side tip of the insole 3, that is, the angle formed by the floor surface and the heel side tip 34 is about 70 degrees. The angle formed by the floor surface and the heel-side tip 34 is preferably an acute angle rather than 90 degrees, and is preferably between 60 degrees and 80 degrees. The optimum angle is around 70 degrees.

As shown in FIG. 13, the DD cross section of the insole 3, that is, a cross-sectional view of the side close to the inside of the foot, the insole 3 has a bowl shape that is high at both ends and indented in the middle. The arch holding part 32 which is a small high bulge is provided in the center of the recessed part. The height of the raised portion of the arch holding portion 32 is higher than the height of the raised portion of the cubic bone holding portion 33 of FIG. Further, at both ends of the insole 3, the height of the tip closer to the heel side is higher than the height of the tip of the toe side. Further, the rising angle of the heel-side tip of the insole 3, that is, the angle formed by the floor surface and the heel-side tip 34 is about 70 degrees. The angle formed by the floor surface and the heel-side tip 34 is preferably an acute angle rather than 90 degrees, and is preferably between 60 degrees and 80 degrees. The optimum angle is around 70 degrees.

As shown in FIGS. 14 and 15, the insole 3 has an upper surface with irregularities along the shape of the sole, and is made to fit the sole. The insole 3 may be changed in size and uneven shape according to the age, sex and body shape of the user. The insole 3 is made of a material having a certain hardness, such as a plastic resin or a thick non-woven fabric. The sole guide part 35 provided in the part where the toes hit is a convex part for making it easy to place the toes, but may be omitted.

FIG. 16 is a reference diagram of the sole showing which part of the sole corresponds to the arch holding portion 22 and the cubic bone holding portion 23 of the sole portion 2 of the slipper 100 shown in FIG. 1. FIG. 17 is a reference diagram showing a state in which the slipper 100 shown in FIG. 1 is used.

As shown in FIG. 16, there is an arch F2 on the inside of the sole, and the cubic bone is in the F1 portion of the sole. The cubic bone
It is located in front of the ribs and forms a joint with the ribs at the rear, and is jointed with the 4th and 5th metatarsal bones on the front side and with the outer cuneiform bone on the inside. The center of gravity of the entire body is applied to the sole of the foot, but if the position of the center of gravity is gathered in the cubic bone part, the center of gravity moves smoothly during walking, and the walking posture is less fatigued even if walking for a long time. it can. Therefore, it is important to support the correct walking posture by holding the portion hit by the cubic bone with an appropriate force that is not too strong from below. The slipper 100 of the embodiment of the present invention is provided with a cubic bone holding portion 33 that is a moderately raised bulge on the portion of the insole 3 that is used as a core material that is in contact with the cubic bone. It can be wrapped and fitted, and it can support walking postures that are less fatigued.

As shown in FIG. 17, when walking with the slipper 100 of the present invention, the center of gravity is slightly behind the case of walking barefoot. Therefore, the back muscles are stretched, the pressure on the left and right is evenly distributed on the sole, and improvement of the center of gravity balance can be expected. Also, if you walk the right way, you can expect a tightening effect on the lower body because the hips, thighs, and calf muscles are used in a balanced manner.

(Embodiment 2)
Next, the slipper 200 according to the second embodiment will be described with reference to FIGS.

FIG. 18 is a perspective view of a slipper 200 according to Embodiment 2 of the present invention. FIG. 19 is a right side view of the slipper 201 for the right foot of the slipper 200 shown in FIG. FIG. 20 is a bottom view of the slipper 200 shown in FIG.

  The slipper 200 according to the second embodiment is a slipper for outdoor use in which an outdoor outsole 26a having a rubber bottom is added to the bottom surface. As shown in FIG. 18, the slipper 200 uses an outdoor outsole 26a made of a material having high hardness as the bottom material. Other parts, the upper part, and the insole part have the same configuration as the slipper 100 of the first embodiment, and thus the description thereof is omitted.

  As shown in FIG. 19, the slipper 200 is devised so that it can be safely and comfortably walked indoors and outdoors by further bonding an outdoor outsole 26a to the lower surface of the sole portion 2 that is wrapped around the insole and sewn. Is. The outdoor outsole 26a uses a material having high hardness used for a shoe sole. As the material of the outdoor outsole 26a, a rubber bottom, a leather bottom, a urethane bottom, a sponge bottom, or the like is used.

  As shown in FIG. 20, a plurality of streamline grooves 26b, which are streamline-shaped grooves, are provided in parallel on the outdoor outsole 26a. In particular, a circular groove 26c provided to draw a plurality of circles is provided in the lower part of the thumb and the heel part of the toe, which are parts where the center of gravity is applied. By providing these streamline grooves 26b and circular grooves 26c, it becomes difficult to slip when walking. Therefore, the slipper 200 is a slipper that can be worn not only indoors but also outdoors and can be safely walked without slipping.

  Regarding the streamline groove 26b and the circular groove 26c of the outdoor outsole 26a, the shape of the groove is not limited to a streamline or a circumferential shape, and may be a linear shape or other shape. Further, unevenness may be provided instead of the groove.

  In this embodiment, the bottom surface of the slipper has a bottom surface for indoor wear and a bottom surface for outdoor wear, but each has been created separately. The outdoor outsole may be used by changing the timely.

100, 200 Slippers 101, 201 Right foot slippers 102, 202 Left foot slippers 1 Upper part 11 Right cover part 11a Right cover part edge 12 Left cover part 12a Left cover part edge 13 Sewing part 13a Sewing part right end edge 13b Sewing part Left edge 14 Front end opening 15 Foot insertion part 2 Sole part 21 Sole front end 22 arch holding part 23 Cubic bone holding part 24 heel holding part 26 bottom face 26a outdoor outsole
26b Streamlined groove 26 Circular groove
27 Side inner part 28 Side inner stitching part 29 Side outer part

3 insole 31 insole tip 32 arch holding part 33 cubic bone holding part 34 heel holding part 35 toe guide 36 back of insole H person F foot F1 cubic bone F2 arch

Claims (5)

At least the size of the upper half of the instep is covered, the upper part has an opening on the toe side when the foot is inserted, and the insole is wrapped and sewn with cloth or leather or other sheet-like material A sole portion, and the insole is a arch that is a bulge provided at the center outer side of the upper surface of the insole and an arch that is a bulge that is higher than the cuboid bone holding portion provided near the center inner side of the upper surface of the insole. A slipper having a holding part, wherein a gap between the cubic bone holding part and the arch holding part is recessed low.   The upper has a right cover portion and a left cover portion which are integrally provided on the left and right sides, and an elongated opening provided along the boundary line in the middle of the boundary line between the right cover portion and the left cover portion. 2. The sewing machine according to claim 1, further comprising: a stitched portion that is a stitch formed by stitching the left and right ends of the stitches, and a curve of the stitches of the stitched portion is a curve along the upper surface of the instep. slipper.   The slipper according to claim 1, wherein the toe spring has a toe-side tip that is warped upward to form a toe spring.   The slipper according to any one of claims 1 to 3, wherein the sole portion has an acute angle on the upper side of the cross-sectional shape of the heel side tip. The slipper according to any one of claims 1 to 4, wherein an outsole portion having a plurality of streamlined grooves is provided on a bottom surface of the sole portion.

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