JP2024000069A - Plantar mounting device - Google Patents

Abstract

To provide a plantar mounting device capable of promoting stable weight transfer when walking, etc.SOLUTION: A plantar mounting device includes a flexible main body for supporting a sole, a first pad part protruding from an area corresponding to a heel outside of the body, a second pad part protruding from an area corresponding to a third metatarsal base of the body, and a third pad part protruding from an area corresponding a thenar of the body. The second pad part is disposed on a prescribed trajectory connecting the first pad part and the third pad part, and each pad part is configured to form a step in the body.SELECTED DRAWING: Figure 4

Description

The present invention relates to a sole attachment device that supports the sole of the foot.

BACKGROUND ART Insoles are known that are designed to not only adjust shoe size but also allow smooth and stable weight transfer when walking (see Patent Document 1). When the weight is transferred normally during walking, the load on the sole of the foot begins at the heel, passes slightly outside to the ball of the foot, and exits through the big toe. Therefore, a linear raised portion corresponding to this trajectory is provided on the surface of the insole. By being aware of the raised area on the sole of the foot when the user walks, the user is naturally encouraged to shift their weight normally.

Japanese Patent Application Publication No. 2006-325611

However, in the insole of Patent Document 1, although there is a load movement during walking, since the protuberance is elongated, the elongated protrusion always comes into contact with the sole of the foot, which tends to cause discomfort to the user. In addition, when stepping on the tip of the raised part, pressure is applied to other parts besides the tip, so when taking off the ground, the load is concentrated on the ball of the foot, making it difficult to kick off, so there was room for improvement.

The present invention has been made in view of these problems, and one of its objects is to provide a sole attachment device that can promote stable weight movement during walking.

A sole attachment device according to an aspect of the present invention includes a flexible main body for supporting the sole of the foot, a first pad portion protruding from a region corresponding to the outside of the heel on the main body, and a third metatarsal bone on the main body. The device includes a second pad portion that protrudes from the region corresponding to the base, and a third pad portion that protrudes from the region of the main body that corresponds to the ball of the foot. The second pad section is arranged on a predetermined trajectory connecting the first pad section and the third pad section, and each pad section is provided so as to form a step in the main body.

According to the present invention, it is possible to provide a sole attachment device that can promote stable weight transfer during walking or the like.

It is a figure showing an insole concerning an embodiment. FIG. 3 is a perspective view of the insole seen from below. It is a figure showing the structure of an insole in detail. It is a figure showing the structure of an insole in detail. It is a figure showing the structure of an insole in detail. It is a figure showing the structure of an insole in detail. It is a figure showing the structure of an insole in detail.

Embodiments of the present invention will be described in detail below with reference to the drawings.
The insole of this embodiment has a plurality of pad portions protruding from the back surface thereof. The pressure applied by the user while walking (hereinafter also referred to as "foot pressure") moves sequentially over the plurality of pads along a trajectory set in the insole, thereby promoting smooth and stable weight transfer. The specific configuration will be explained in detail below.

FIG. 1 is a diagram showing an insole according to an embodiment. FIG. 1(A) is a plan view, and FIG. 1(B) is a bottom view. In addition, in the following description, for convenience, the up-down, left-right, and front-back directions are expressed based on the direction seen from the user wearing the insole. In addition, the inside and outside may be expressed based on the user's foot wearing the insole. In this embodiment, an insole for a right foot is shown as an example, but an insole for a left foot also has a similar structure if the left and right sides are reversed.

The insole 1 includes a main body 10 having an outer shape that follows the inner sole of the shoe, and a plurality of pad sections 12 (12a to 12f) provided on the back surface of the main body 10. The main body 10 is obtained by hot press-molding a flexible resin material such as EVA (Ethylen-Vinyl Acetate). On the other hand, the pad portion 12 is obtained by injection molding (in-mold foaming such as urethane foam) using a resin material such as PU (Polyurethane), and is adhered or welded to the back surface of the main body 10 . The main body 10 and the pad portion 12 may be made of an elastomer such as rubber or plastic, but the pad portion 12 is made of a softer material than the main body 10. In addition, in a modification, the main body 10 and the pad portion 12 may be made of the same material.

As shown in FIG. 1(A), the surface of the main body 10 is provided with raised parts 14a and 14b along the left and right edges corresponding to the inner and outer sides of the arch, and can support the sole of the user's foot from the left and right sides. It is configured as follows. Although the surface of the main body 10 has a large curved shape along the sole of the foot, it has a generally flat shape with no protrusions except for the raised portions 14a and 14b. A layer of fabric is applied over its entire surface.

As shown in FIG. 1B, the back surface of the main body 10 has a first pad section 12a, a second pad section 12b, a third pad section 12c, a fourth pad section 12d, a fifth pad section 12e, and a sixth pad section. 12f is provided protrudingly. Each pad portion 12 forms a step on the back surface of the main body 10. Details of the configuration and arrangement of each pad portion 12 will be described later.

FIG. 2 is a perspective view of the insole 1 seen from below. 2(A) shows the structure of the main body 10, and FIG. 2(B) shows the assembly structure of the pad portion 12 to the main body 10.
As shown in FIG. 2(A), a concave fitting portion 16 (16a to 16c) corresponding to the shape of the pad portion 12 is provided on the back surface of the main body 10. The fitting part 16a corresponds to the first pad part 12a, the fourth pad part 12d and the sixth pad part 12f, the fitting part 16b corresponds to the second pad part 12b, and the fitting part 16c corresponds to the third pad part 12c. corresponds to Note that in this embodiment, the fifth pad portion 12e is integrally molded with the main body 10.

The depth of each fitting portion 16 is set to such an extent that each pad portion 12 can sufficiently protrude. The first pad section 12a and the sixth pad section 12f are integrally molded with the fourth pad section 12d, and each protrudes from the fourth pad section 12d. Each pad section except the fifth pad section 12e is bonded to each fitting section 16. In addition, in a modified example, each pad part may be hot-fused and bonded after being assembled to each fitting part.

3 to 7 are diagrams showing the structure of the insole 1 in detail. FIG. 3 shows the positional relationship between the pad portion 12 and the foot skeleton in a plan view of the insole 1. The two-dot chain line in the figure indicates the outline and skeleton of the foot, and the broken line indicates the position of the pad portion 12 on the back surface of the insole 1. FIG. 4 shows the bottom surface of the insole 1 and corresponds to FIG. 1(B).

As shown in FIG. 3, the first pad part 12a is arranged in the area corresponding to the outside of the heel in the main body 10, the second pad part 12b is arranged in the area corresponding to the third metatarsal base, and the third pad part 12b is arranged in the area corresponding to the ball of the foot. A pad portion 12c is arranged. The second pad portion 12b is arranged on a predetermined trajectory T connecting the first pad portion 12a and the third pad portion 12c. The trajectory T is preset as a movement trajectory of foot pressure when the body weight is stably shifted during walking.

In normal walking, the foot touches the ground from the heel, the load moves to the ball of the foot along the trajectory T, and the foot kicks off with the ball of the foot to take off the ground. This action is repeated alternately with the left and right feet. The first pad portion 12a guides the user to step forward after touching the ground. The second pad portion 12b maintains a state in which the foot can easily function when the body weight shifts.

As is well known, the sole of the foot has three fulcrums: the heel, the ball of the foot, and the ball of the lesser foot, and there are three arches connecting each fulcrum. There is a transverse arch A1 that connects the ball of the foot and the ball of the foot, a medial longitudinal arch A2 that connects the ball of the foot and the heel, and an lateral longitudinal arch A3 that connects the heel and the ball of the foot. A dome is formed. The third metatarsal base P is located at the apex of its dome. By arranging the second pad portion 12b directly under the dome, the burden on the soles of the feet during walking is reduced, and walking function is maintained well.

Since the third pad portion 12c firmly receives the ball of the foot, it is possible to hold the foot firmly, and it is possible to perform a strong kick when taking off from the ground.

The fourth pad portion 12d is arranged to surround a region corresponding to the rear half of the sole including the heel. The fifth pad portion 12e extends forward from the area corresponding to the outer side of the heel, and the front half thereof is arranged along the area corresponding to the little toe. The sixth pad portion 12f is arranged in the inner area of the arch of the foot.

As also shown in FIG. 4, the second pad portion 12b is arranged at the center of the back surface of the main body 10. The second pad portion 12b has a rounded triangular shape in plan view, and has a small apex of R (the radius of the corner chamfer) at its front end. The second pad portion 12b is located on the reference line L of the main body 10. Here, the reference line L is a straight line passing through the widthwise center (approximately the center) of the main body 10. The above-mentioned trajectory T intersects with the reference line L.

The third pad portion 12c has an elliptical shape in plan view, and is located slightly in front and inside of the second pad portion 12b. The fourth pad portion 12d has a U-shape in plan view and extends along the rear peripheral edge of the main body 10. The left and right front ends of the fourth pad portion 12d extend to a position aligned with the second pad portion 12b. The fourth pad portion 12d supports the rear half of the sole of the foot, thereby guiding the foot to walk straight.

The first pad portion 12a is located at the rear and outer side of the second pad portion 12b, and overlaps the rear outer side of the fourth pad portion 12d. The first pad portion 12a has a rounded triangular shape when viewed from above, and has a small apex of radius at its inner end. The first pad portion 12a and the third pad portion 12c are located on opposite sides relative to the reference line L. The first pad portion 12a is located outside the reference line L, and the third pad portion 12c is located inside the reference line L.

The first pad part 12a, the second pad part 12b, and the third pad part 12c act on the sole of the foot in sequence, encouraging stepping on the outside, center, and ball of the foot, thereby realizing a smooth weight shift. . By providing these pad sections independently with respect to the main body 10, the load acting on each pad section is made difficult to be transmitted to other pad sections.

The fifth pad portion 12e extends toward the front of the main body 10 from slightly inside the first pad portion 12a. The front half of the fifth pad part 12e is located on the opposite side of the third pad part 12c with respect to the reference line L, and extends along the outer peripheral edge of the main body 10. The tip of the fifth pad portion 12e is located further forward than the third pad portion 12c. The fifth pad portion 12e forms a slight step with respect to the main body 10, thereby promoting forward movement of the foot.

During forward movement such as walking or jogging, the sole of the foot is pressed in the order of first pad part 12a → second pad part 12b → third pad part 12c, which induces a load transfer from the rear outer side to the front inner side. be done. On the other hand, the pressure of the fifth pad portion 12e induces a load shift from the rear inner side to the front outer side. The resultant vector of these loads points in the straight direction, encouraging straight foot movement.

The sixth pad portion 12f has a circular shape in plan view, and overlaps the inside of the front portion of the fourth pad portion 12d. The sixth pad portion 12f is located slightly behind and inside the second pad portion 12b. The sixth pad portion 12f prevents the heel portion from falling inward (overpronation).

FIG. 5 is a side view of the insole 1. 5(A) shows the inner surface (as seen in the direction of arrow A in FIG. 4), and FIG. 5(B) shows the outer surface (as seen in the direction of arrow B in FIG. 4).
As shown in FIG. 5(A), the inner side of the main body 10 is largely curved upward at the arch corresponding portion 20. As shown in FIG. The second pad portion 12b and the sixth pad portion 12f are located in the arch corresponding portion 20. The third pad part 12c is located in front of the arch corresponding part 20, and the first pad part 12a is located behind the arch corresponding part 20. Further, a raised portion 14a is located at the inner end of the arch corresponding portion 20 of the main body 10.

As shown in FIG. 5(B), the main body 10 is also gently curved upward on the outside of the arch corresponding portion 20. As shown in FIG. A raised portion 14b is located at its outer end. The fifth pad portion 12e has a smaller thickness (height) than the fourth pad portion 12d. The outer raised portion 14b is located at a lower position than the inner raised portion 14a.

FIG. 6 is a diagram showing a longitudinal section of the insole 1. 6(A) shows a cross section taken along the line CC in FIG. 4, and FIG. 6(B) shows a cross section taken along the line DD. FIG. 7 is a diagram showing a cross section and a back surface of the insole 1. 7(A) is a cross section taken along the line EE in FIG. 4, FIG. 7(B) is a cross section taken along the line FF, FIG. 7(C) is a cross section taken along the line GG, and FIG. 7(D) is a cross section taken along the line H- A cross section taken in the direction of arrow H is shown. FIG. 7(E) is a rear view, taken in the direction of arrow I in FIG. 4. FIG.

As shown in FIG. 6(A), the second pad portion 12b is provided so as to approach the arch corresponding portion 20. The lower surface of the second pad portion 12b has a gently curved surface that is convex downward. A heel cup part 24 is provided at the rear of the main body 10 so as to surround the heel corresponding part 22. The heel cup portion 24 is formed such that the peripheral edge of the main body 10 is inclined upward. A notch 26 that opens rearward is provided at the rear end of the heel cup portion 24 (details will be described later).

As shown in FIG. 6(B), the first pad portion 12a is integrally molded with the fourth pad portion 12d. The lower surface of the first pad portion 12a has a gently curved surface that is convex downward. The second pad portion 12b is fixed to the main body 10 so that the vicinity of its upper surface is fitted into the fitting portion 16b. The third pad portion 12c is also fixed to the main body 10 so that the vicinity of its upper surface is fitted into the fitting portion 16c. As also shown in FIG. 7(A), the third pad portion 12c has a concave shape in which the height of the central portion is lower than that of the peripheral portion. In other words, the thickness of the third pad portion 12c gradually increases from the center toward the outside. In this embodiment, the concave shape is a mortar shape with a gently curved surface.

As shown in FIG. 7B, since the second pad portion 12b is arranged in the arch-corresponding portion 20, the normal line Ln of the second pad portion 12b is inclined with respect to the vertical line Lv (inclination angle θ). As a result, the second pad portion 12b projects obliquely toward the inside of the main body 10.

As shown in FIG. 7(C), the fourth pad part 12d is fixed to the main body 10 so that the vicinity of the upper surface of the fourth pad part 12d fits into the fitting part 16a. The height of the fifth pad portion 12e in the main body 10 is lower than that of the other pad portions. Therefore, it is technically difficult to fit the fifth pad portion 12e into the main body 10 and make it protrude. Therefore, as described above, the fifth pad portion 12e is integrally molded with the main body 10. In a modified example, a concave fitting part corresponding to the fifth pad part 12e is provided in the main body 10, and the fifth pad part 12e, which is separately manufactured in the same way as the other pad parts, is fitted into the fitting part and fixed. It's okay.

As shown in FIG. 7(D), the first pad portion 12a is fixed to the main body 10 so that the vicinity of the upper surface of the first pad portion 12a fits into the fitting portion 16a. In a front view of the main body 10, the first pad section 12a and the second pad section 12b partially overlap, and the second pad section 12b and third pad section 12c partially overlap. The heel corresponding part 22 has a substantially flat central part in the width direction, and is surrounded by a heel cup part 24 having a large slope on the left and right sides thereof.

As shown in FIG. 7E, a notch 26 is formed at the center of the rear end of the heel cup portion 24 in the width direction. By providing the notch 26 in the heel cup portion 24 in this way, the user's heel can be exposed to the rear of the insole 1, thereby improving the fit to the rear wall of the shoe. Furthermore, the position of the heel can be stabilized when the foot touches the ground while walking.

As described above, the insole 1 of the present embodiment is provided with pad portions 12a to 12c at positions corresponding to the outer side of the heel, the base of the third metatarsal bone, and the ball of the foot on the back surface of the main body 10. Therefore, the pressure applied by the user when walking or jogging (foot pressure) is encouraged to move sequentially along an ideal trajectory connecting these pad sections, and stable weight movement can be achieved. It can also improve the functions of the feet when walking (shock absorption, stability, propulsion, etc.). Since the pad portions are provided in a scattered manner on the main body 10 and each form a step, there is no discomfort caused by the long and thin protrusions always coming into contact with the sole of the foot.

Further, since the pad portion 12c corresponding to the ball of the foot is provided on the main body 10 independently of the pad portions 12b and 12a, the user can concentrate the load on the ball of the foot when kicking off. can. Furthermore, since each pad portion is made of a softer material than the main body 10 and is provided on the back side of the main body 10, it is possible to provide appropriate and comfortable stimulation to the soles of the user's feet. By generating an appropriate reaction force that acts on the sole of the foot when stepping on the foot, it is possible to achieve a smooth and comfortable walk. By providing each pad section on the back side of the main body 10, each pad section can perform its function when a certain amount of load (body weight, stepping force) from the user is applied.

Furthermore, since the pad portion 12c corresponding to the ball of the foot is configured as a concave (mortar-shaped) protrusion at its center, the surface pressure of the pad portion 12c that is applied when a load is applied is transferred to the peripheral edge ( (peripheral area surrounding the recess). The ball of the big toe can easily fit into the pad portion 12c. Therefore, slippage (displacement) between the insole 1 and the ball of the foot when taking off from the ground can be suppressed, and the kicking force can be firmly transmitted to the ground. As a result, smooth weight movement can be achieved when walking.

[Modified example]
In the embodiment described above, in order to make the main body 10 and the pad part 12 different in material (hardness, etc.), they are manufactured in separate processes and then assembled. In a modified example, the main body and the pad portion may be made of the same material and may be integrally molded by processing (press molding, injection molding, foam molding, etc.) using a mold using a single resin material.

In the above embodiment, an example was shown in which six pad portions 12a to 12f are provided on the back surface of the main body 10. In a modification, some of these six pad sections may be omitted. Alternatively, another pad portion may be added.

In the above embodiment, an insole placed on the inner sole of a shoe is exemplified as the sole attachment device, but it may also be an insole placed on the inner sole of sandals, sandals, slippers, tabi, socks, or other footwear. Alternatively, it may be realized as a sole attachment device that forms the sole of footwear such as shoes, sandals, sandals, slippers, tabi, and socks.

When the objective (task) is to provide a stable and strong kick, a certain effect can be obtained if at least the third pad portion 12c is provided. Such a sole attachment device can be expressed, for example, as follows.
A flexible body to support the soles of the feet,
a pad portion protruding from a region corresponding to the ball of the foot of the main body;
A sole attachment device, characterized in that the pad portion has a concave shape with a central portion lower in height than a peripheral portion.

In another modification, the pad portion may be provided on the front surface of the main body instead of the back surface. Alternatively, pad portions may be provided on both the front and back surfaces of the main body. In that case, the arrangement of the plurality of pad sections with respect to the sole of the foot may be the same as in the above embodiment, or some pad sections may be omitted. Alternatively, another pad portion may be added.

When aiming at stable stepping, a certain effect can be obtained if at least the notch 26 in the heel cup portion 24 is provided. Such a sole attachment device can be expressed, for example, as follows.
Equipped with a flexible body to support the soles of the feet,
The main body has a heel cup portion whose peripheral edge slopes upward,
A sole attachment device characterized in that the rear end of the heel cup portion is provided with a notch that opens rearward.

It should be noted that the present invention is not limited to the above-described embodiments and modified examples, and can be embodied by modifying the constituent elements without departing from the scope of the invention. Various inventions may be formed by appropriately combining a plurality of components disclosed in the above embodiments and modified examples. Furthermore, some components may be deleted from all the components shown in the above embodiments and modified examples.

1 insole, 10 main body, 12a first pad part, 12b second pad part, 12c third pad part, 12d fourth pad part, 12e fifth pad part, 12f sixth pad part, 14a raised part, 14b raised part, 16a fitting part, 16b fitting part, 16c fitting part, 20 corresponding part, 22 heel corresponding part, 24 heel cup part, 26 notch part, L reference line, P third metatarsal base, T locus, a1 side Arch, a2 inner longitudinal arch, a3 outer longitudinal arch.

Claims (8)

A flexible body to support the soles of the feet,
a first pad portion protruding from a region corresponding to the outside of the heel of the main body;
a second pad portion protruding from a region of the main body corresponding to a third metatarsal base;
a third pad portion protruding from a region of the main body corresponding to the ball of the foot;
Equipped with
The second pad section is arranged on a predetermined trajectory connecting the first pad section and the third pad section, and each pad section is provided so as to form a step in the main body. Plantar attachment. The first pad portion is provided outside a reference line passing through the center of the main body in the width direction,
the second pad portion is provided on the reference line;
The sole attachment device according to claim 1, wherein the third pad portion is provided inside the reference line. The sole attachment device according to claim 1 or 2, wherein the third pad portion has a concave shape in which the height of the central portion is lower than that of the peripheral portion. The sole attachment device according to claim 1 or 2, wherein the first pad section, the second pad section, and the third pad section are provided on the back side of the main body. The main body has a shape in which an arch corresponding portion is curved upward,
The sole attachment device according to claim 1 or 2, wherein the second pad portion is provided so as to approach the arch corresponding portion. The main body has a heel cup portion whose peripheral edge slopes upward,
The sole attachment device according to claim 1 or 2, characterized in that a rear end portion of the heel cup portion is provided with a notch portion that opens rearward. The sole attachment device according to claim 1 or 2, further comprising a U-shaped fourth pad portion protruding along the rear peripheral edge of the main body. A fifth pad portion extending forward is provided on the opposite side of the third pad portion with respect to the reference line in the main body,
The sole attachment device according to claim 2, wherein the height of the fifth pad portion is lower than the height of the third pad portion.

Images