JP2022510945A - High heel footwear bottom structure and high heel footwear with it - Google Patents

Abstract

The present invention discloses a bottom structure of high-heeled footwear having a walking mechanism similar to that of human walking when a pedestrian wears high-heeled footwear and walks. The bottom structure of high-heeled footwear of the present invention includes a front portion that supports the ground, a bending portion that extends from the front portion and is located at the posterior portion of the metatarsophalangeal joint and bends in a direction opposite to the ground. Then, the rear portion extended from the bending portion is included.

Description

INDUSTRIAL APPLICABILITY According to the present invention, when a pedestrian wears a high-heeled footwear and walks, the bottom structure of the high-heeled footwear and the heel provided with the same have a walking mechanism similar to that of a human walking. It's about expensive footwear.

After the midstance during the human walking cycle, during the heel off (take-off of heel) and toe (toe off; take-off of toe) periods. At the toe joints, flexion (extension) to the instep side of the foot occurs, and at the same time, varusion and adduction of the heel of foot. Movement occurs.

A pedestrian wearing conventional high-heeled footwear has a high heel, which reduces the stability of the rear foot when the weight of the human body is applied to the ground during standing or walking. And experience ankle sprain. Therefore, a conventional sole structure of high-heeled footwear is a metal shank (metal) from the posterior boundary of the anterior portion to the end of the hind foot, where the footwear is in contact with the ground and supported by the ground. A very hard material with a shank) inserted is used.

In addition, since the conventional foot with high heels is in a state where the sole fascia is pulled tightly, the passive movement of bending the toes to the bottom side (passive movement). Occurs. Therefore, the foot in the state of wearing the conventional high-heeled footwear has a force acting to bend toward the ground even on the front portion, which is the portion supported by the ground of the high-heeled footwear. Therefore, the front portion of the footwear with a high heel is made rigidly to maintain the shape of the footwear during the swing phase when the weight of the human body is not loaded on the ground. In particular, when a platform is attached to the bottom of the front portion of the footwear with a high heel supported by the ground, movement of the forefoot and rearfoot is not allowed at all.

Also, during the heel off and toe off periods after the midstance, extension from the metatarsophalangeal joints to the instep side. Occurs. However, the conventional high-heeled sole structure cannot cope with this because it is not flexible, and there is a problem that the heel of the foot comes out of the footwear and it becomes difficult to walk normally.

FIG. 24 is a side sectional view showing the skeleton of the foot and the main structure of the footwear while wearing the conventional high heel footwear, and FIG. 25 is used for manufacturing the conventional high heel footwear. It is a figure which showed the wooden pattern (last, also called "last") and a general bottom structure.

Typical high-heeled footwear is made through the following process.

First, footwear with a high heel is covered with the upper shell U in a state where the general bottom structure S (sole structure) and the wooden pattern L (last) are combined, and then the general bottom structure S is used. Manufactured through the process of tightly bonding the upper U. The footwear with a high heel is manufactured by combining the heel H and the outsole O with the general bottom structure S. The general bottom structure S extends from the posterior boundary BL of the portion supporting the ground (part A in FIG. 24) to the end of the hind foot (FIG. 25) for standing and stability of walking. A metal shank MS (metal shank) is inserted in the portion B indicated by the dot. That is, in the general bottom structure S, a very hard metal shank MS (metal shank) connected from the rear boundary BL portion of the portion supporting the ground to the hindfoot portion is bonded.

On the other hand, the weight-bearing sites on the foot are the heel of the foot, the first metatarsal bones, and the fifth metatarsal bones. The three points mentioned above are connected to each other in an arch form, enabling efficient weight loading and walking.

In footwear with high heels, the posterior part of the metatarsal head MTBH (heads of metatarsal bones) is artificially raised. Therefore, a very solid material is used for the portion B floating in the air without being supported by the ground in the conventional bottom structure S. Further, the heel H of the footwear having a high heel is coupled to the rear of the conventional bottom structure S to maintain the shape of the footwear.

FIG. 26 is a diagram for explaining a state of extension of metatarsophallangeal joints in a state of wearing conventional footwear with a high heel.

In general, if you wear footwear with a high heel, the metatarsophalangeal joint MTP will always maintain an extended state due to the shape of the footwear, so that the sole fascia PF (platter fascia) It will be pulled tightly (indicated by the virtual line arrow in FIG. 26). When the sole muscular membrane PF is pulled in this way, a passive movement that causes the metatarsophalangeal joint (MTP) to flex (flexion) occurs, and the toes try to bend to the sole side of the foot. Force is generated (indicated by the solid arrow in FIG. 26). Therefore, the portion of the footwear with a high heel that supports the ground is made to some extent to maintain the shape of the footwear.

27 (a) to 27 (c) are diagrams for explaining the problems of conventional footwear with a high heel. FIG. 27 (a) is a diagram showing standing and midstand during walking while wearing footwear with a high heel, and FIG. 27 (b) is a diagram showing heel takeoff during walking (b). It is a figure which showed the time of heel off, and (c) of FIG. 27 is a figure which showed the time of toe off during walking.

In the conventional bottom structure S, even if the portion supporting the ground is manufactured to be flexible to some extent, the bottom structure S does not bend during the heel off period. During the heel off period, the weight is loaded on the ground through the metatarsophalangeal head MTBH, so that even if the heel of the foot is off the ground, the front part of the foot including the metatarsophalangeal head MTBH is in contact with the ground. You will be doing it. Therefore, in the conventional bottom structure S, even if the portion supporting the ground is flexible to some extent, the bottom structure S does not bend during the heel off period so that the heel of the foot comes out of the footwear. Become.

During the toe off period, the metatarsophalangeal head MTBH is off the ground and the weight is applied only to the toes. Therefore, in the conventional bottom structure S, when the portion supporting the ground is manufactured flexibly to some extent, the portion below the metatarsophalangeal joint can be bent to some extent. However, even in this case, the foot does not bend sufficiently to follow the movement of the foot, and the heel of the foot further comes out of the footwear as shown in FIG. 27 (c).

Therefore, the footwear with a high heel to which the conventional bottom structure S is applied cannot keep up with the movement of the foot due to walking and cannot support the foot.

Therefore, the present invention has been proposed to solve the above problems, and an object of the present invention is to flexion the metatarsophalangeal joint during the swing phase. The bottom of high-heeled footwear that limits the shape of the footwear and supports the weight during the standing phase and standing, which improves the stability of walking. The purpose is to provide a structure and high-heeled footwear equipped with it.

Another object of the present invention is to allow extension of the metatarsophalangeal joint during heel off and toe-off during walking. It is an object of the present invention to provide a high-heel footwear bottom structure optimized for foot movement and a high-heel footwear equipped with the bottom structure.

In order to achieve the above-mentioned object of the present invention, the present invention is located at the front portion supporting the ground, the posterior portion of the metatarsophalangeal joint extending from the front portion, and bending opposite to the ground. Provided is a bottom structure of footwear with a high heel, including a bending portion and a rear portion extending from the bending portion.

The bending portion preferably comprises a bending curved surface portion having a concave curved surface on the side opposite to the ground.

The bending curved surface portion is parallel to the horizontal axis of the foot and is along a line intersecting the vertical axis center line of the bending portion, as compared with the curvature of the bending portion vertical axis center line drawn along the vertical axis of the foot. It is preferable that the curvature of the horizontal axis center line of the bent portion to be drawn is formed to be larger.

The bending portion bends concavely to the side opposite to the ground in the section between the heel off and the toe off during the walking cycle, and the swing period during the walking cycle. It is preferable that the bending is restricted toward the ground.

The bending portion bends in the section between the heel off and the toe off during the walking cycle, and the rear portion is oriented in the direction in which the varus of the foot and the adduction of the foot are performed. It is preferable to correspond to the movement of the foot.

It is preferable that the center line of the horizontal axis of the bending portion is formed so that the curvature of the outer portion (lateral side portion) is larger than the curvature of the inner portion (medial side portion).

It is preferable that the bending portion is formed so that the thickness of the outer portion (lateral side portion) is thicker than the thickness of the inner portion (medial side portion).

The bending portion may include at least one bending adjustment hole portion or a bending adjustment recess or groove portion that makes the degree of bending of the inner portion (medical side portion) and the outer portion (lateral side portion) different. can.

Further, in the present invention, in a footwear having a high heel provided with a bottom structure, the bottom structure is located at a front portion supported by the ground and a posterior portion of the metatarsophalangeal joint extended from the front portion. Provides high heel footwear, including a bending section that bends away from the ground and a rear section that extends from the bending section.

Such an invention is a one-way bending portion or a ground that bends only in the direction opposite to the ground on the posterior bottom structure with reference to the ground support boundary line of the posterior or anterior portion of the metatarsophalangeal joint. By forming a bending curved surface formed in a concave shape in the opposite direction to the stance phase, the flexion of the metatarsophalangeal joint is restricted during the swing phase, and the stance phase and standing are restricted. At this time, the stability of the foot is maintained, which has the effect of improving the stability of walking when walking with high-heeled footwear.

The present invention also relates to a bottom structure posterior to the posterior or anterior ground support boundary of the metatarsophalangeal joint during heel off and toe-off during walking. Due to the bending part formed on the object, the movement of the bottom structure is stable by matching the extension movement of the metatarsophalangeal joint with the adduction and varus movement of the ankle of the foot. It has the effect of allowing you to walk comfortably.

It is a figure which showed the skeleton of a foot for explaining the term used in embodiment of this invention. It is a side view which showed the skeleton of a foot and the footwear with a high heel in the state of wearing the footwear with a high heel for explaining the term used in the embodiment of this invention. It is a figure for demonstrating varus (inversion) and valgus (eversion) in the movement of a foot. It is a figure for demonstrating the adduction (adduction) and abduction (abduction) of the movement of a foot. It is a figure for demonstrating the flexion (plantar flexion) to the sole side and flexion (dorsiflexion) to the side of the instep of the foot in the movement of the foot. It is a figure which showed the stance stage (stance) classified into 5 stages in order to explain a general human gait cycle (gait cycle). It is a figure for demonstrating the heel off state during barefoot walking. It is a figure for demonstrating the toe off state during barefoot walking. (A) to (c) are diagrams explaining the direction of bending in a flexible plate structure. (D) to (f) are diagrams illustrating the direction of bending in a flexible plate structure. It is a figure which showed the footwear with a high heel for demonstrating the 1st Embodiment of this invention. FIG. 10 is an exploded view showing a main part of footwear with a high heel. It is a perspective view which showed the bottom structure of 1st Embodiment of this invention. It is a side view of FIG. It is sectional drawing which cut | viewed the XIV-XIV part of FIG. It is sectional drawing which cut | viewed the XV-XV part of FIG. It is a figure explaining the process in which a bending part acts in the state of wearing the footwear with a high heel to which the 1st Embodiment of this invention is applied. To explain the movement of the bottom structure corresponding to the movement of the heel of the foot when the foot is viewed from the rear when the footwear with a high heel to which the first embodiment of the present invention is applied is worn, as compared with the conventional case. It is a figure. It is a perspective view which showed the bottom structure of the 2nd Embodiment of this invention. It is the figure which cut and viewed the XIX-XIX part of FIG. It is the figure which cut and viewed the XX-XX part of FIG. It is a figure which attached the auxiliary member Sb of the 2nd Embodiment of this invention. It is a figure which showed the bottom structure for demonstrating the 3rd Embodiment of this invention. It is a figure which showed the bottom structure for demonstrating the 4th Embodiment of this invention. It is a side sectional view which showed the foot skeleton and the main structure of the footwear in the state of wearing the conventional footwear with a high heel. It is a figure which showed the wooden pattern and the bottom structure used for the conventional footwear production with a high heel. It is a figure for demonstrating the state of extension of metatarsophalrangeal joints in the state of wearing the conventional footwear with a high heel. It is a figure for demonstrating a problem with the conventional footwear with a high heel.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those having ordinary knowledge in the technical field to which the present invention belongs can easily carry out the embodiments. However, the present invention can be realized in various different forms and is not limited to the embodiments described here. In order to clearly explain the present invention in the drawings, unnecessary parts will be omitted, and the same reference numerals will be given to the same or similar components throughout the specification.

FIG. 1 is a plan view showing the skeleton structure of the foot for the purpose of explaining the embodiment of the present invention, and FIG. 2 is a view showing the skeleton of the foot from the side while wearing footwear with a high heel.

The terms used in the description of the embodiments of the present invention will be determined as follows.

The anterior A (anterior or distal) means the direction toward the side of the toes, and the posterior P (posterior or proximal) means the direction opposite to the toes, that is, the direction toward the heel of the foot. do. The inner M (medial) means the direction toward the center of the body, and the outer L (lateral) means the direction opposite to the side of the center of the body. The upper S (superior or dorsal) means the direction toward the instep side, and the lower I (inferior or planar) means the direction opposite to the instep, that is, the direction toward the ground. ..

The vertical axis LA of the foot means the length direction of the foot. The horizontal axis TA means a line connecting the first metatarsophalangeal joint (MTP1) and the fifth metatarsophalangeal joint (MTP5) while intersecting the vertical axis LA.

The metatarsal joint MTP (metatarsal phalangeal joint) means a joint between the metatarsal bones (MTB) and the proximal phalanx PP (proximal phalanx).

The forefoot portion FF (forefoot) means an anterior portion with reference to the tarsal metatarsal joint (TMT). The midfoot MF (midfoot) means between the ankle metatarsal joint (TMT) and the transverse tarsal joint TT (transverse tarsal joint). The hindfoot RF (rearfoot) means the posterior part of the transverse tarsal joint TT (transverse tarsal joint).

The metatarsal head MTBH (heads of metatarsal bones) means the head of the metatarsal bone MTB (metatarsal bones). Of the metatarsal heads MTBH, the first metatarsal head MTBH1 (1st heads of metatarsal bones), the fifth metatarsal head MTBH5 (5th heads of metatarsal bones), and the heel of the foot are on the ground when standing or walking. This is the part where the weight is applied to the bones.

FIG. 3 is a diagram showing the movements of varus and valgus among the movements of the heel of the foot for explaining the embodiment of the present invention. The varus in the movement of the heel of the foot means the movement of the heel of the foot to rotate inward with respect to the center of the body (mid line) (Twisty movement of the foot direction) (FIG. 3). Virtual line arrow in the direction to the left in (a)). Eversion of the movement of the heel of the foot means the movement of the heel of the foot to rotate outward with respect to the center of the body (mid line) (FIG. 3). Virtual line arrow in the direction to the right in (c)). In FIG. 3, the reference numeral AH is the axis of the heel of the foot (axis of heel).

FIG. 4 is a diagram showing the movements of adduction and abduction among the movements of the foot in order to explain the embodiment of the present invention. The addition of the movement of the foot means the movement of the foot closer to the inside with respect to the center of the human body (virtual line arrow displayed in the direction to the right in FIG. 4). Abduction in the movement of the foot means the movement of the foot moving outward with respect to the center of the human body (virtual line arrow displayed in the direction to the left in FIG. 4). While varus and valgus are rotational motions, adduction and abduction are linear motions.

FIG. 5 is a diagram showing movements that occur in the metatarsophalangeal joint MTP of the foot in order to explain the embodiment of the present invention. Extension of the metatarsophalangeal joint MTP means the movement of the toe to bend upward (virtual line arrow displayed upward in FIG. 5). If you wear footwear with a high heel, the metatarsophalangeal joint MTP will always remain extended due to the shape of the footwear. Flexion of the metatarsophalangeal joint MTP means the movement of the toe to bend downward (virtual line arrow displayed downward in FIG. 5).

With reference to bare feet, the movement of the foot due to the human walking cycle will be described with reference to FIG.

6 (a) to 6 (e) are diagrams for explaining a human walking cycle.

The human walking cycle is divided into a stance phase and a swing phase based on one leg (the part indicated by diagonal lines in the drawing).

The stance phase is a state in which a part of the foot touches the ground while walking. Such a stance phase is a heel strike, a loading response, a midstand, a heel off, and a toe off. It can be divided into 5 stages.

Heel strike means the moment when the heel of the foot touches the ground. The loading response is the stage in which the entire sole of the foot comes into contact with the ground after a heel strike.

Heel strike and loading response are processes that absorb impact from the ground and disperse body weight (shown in FIGS. 6A and 6B). Midstance is the stage in which the maximum weight is placed on the foot with the leg placed vertically on the ground (shown in FIG. 6 (c)). Heel off is the stage at which the heel of the foot separates from the ground (shown in FIG. 6 (d)). Toe off is the stage in which the toes leave the ground (shown in FIG. 6 (e)).

On the other hand, the swing phase means a state in which the entire foot is separated from the ground. There must be sufficient toe clearance during the swing phase. That is, if the toes are not dragged to the ground (toe drag) or caught, the risk of falling and injuring is reduced and stable walking is performed. Walking is performed by repeating the stance phase and the swing phase.

FIG. 7 (a) shows the side surface of the heel off state during barefoot walking, and FIG. 7 (b) shows the heel off state during barefoot walking backward (heel side of the foot). ).

After the mid-stance, the heel of the foot separates from the ground, so that the movement of the heel of the foot occurs with reference to the front foot that comes into contact with the ground. In the heel off stage, the weight is applied to the ground in contact with the ground from the metatarsophalangeal head MTBH to the toes.

In the barefoot heel off state, the extension of the metatarsophalangeal joints (MTP) as the heel of the foot moves away from the ground, in the direction of the virtual line arrow in FIG. 7 (a). Movement) occurs. At the same time, the varus (inversion, the movement in the direction of the virtual line curve arrow (i) in FIG. 7 (b)), which is the movement of the heel of the foot rotating inward, and the movement of which is closer to the inside. A rotation (movement in the direction of the virtual line straight arrow (a) in FIG. 7 (b)) occurs.

FIG. 8A shows an aspect of the toe-off state during bare-foot walking, and FIG. 8B shows the toe-off state during bare-foot walking backward (foot). It is a figure seen from the heel side of.

In the toe off stage, weight is applied to the ground only through the toes as the metatarsophalangeal head MTBH moves off the ground.

As shown in FIG. 8, during the toe off period, the metatarsophalangeal joint (MTP) is further extended, and the heel varus and adduction of the foot. The movement of (addition) is maximized.

9a and 9b (a) to (f) are diagrams illustrating the direction of bending in a flexible plate structure.

As shown in FIG. 9a (a), the flexible flat plate structure (flat plate) having no curvature has no directionality with respect to bending, and has a vertical axis plane LP (Longitive plane) and a horizontal axis plane TP (Transverse plane). ), All easily bend upwards and downwards.

FIG. 9a (b) is a diagram for explaining that when a curve is applied along one axis (zero gaussian curvature), bending is restricted along an axis intersecting the curve (zero gaussian curvature). .. As shown in FIG. 9a (b), when a concave curve is given upward along the horizontal axis surface TP, bending at the vertical axis surface LP intersecting the curve is restricted, and particularly downward. The bends that go to are the most restricted.

9a (c) and 9b (d) are diagrams illustrating the direction of bending when bending is applied along two axes intersecting each other.

As shown in FIG. 9a (c), the direction of bending along the horizontal axis surface TP (concave upward) and the direction of bending along the vertical axis surface LP (concave downward) are opposite (concave downward). In the negative gaussian curvature), all upward and downward bending with respect to the vertical axis plane and the horizontal axis plane is restricted. On the other hand, as shown in (d) of FIG. 9b, when the directions of curvature with respect to the two axes are the same (positive gaussian curvature), for example, all are concave upward along the vertical axis plane LP and the horizontal axis plane TP. If so, the downward bending is restricted in all of the vertical axis surface LP and the horizontal axis surface TP.

FIG. 9b (e) is a diagram for explaining that the steeper the slope of the curved shape, the more the bending in the direction opposite to the curved direction on the axis intersecting the curved axis is further restricted. As shown in FIG. 9b (e), the steeper the concave curve upward along the horizontal axis surface TP, that is, the larger the curvature, the lower the downward direction on the vertical axis surface LP intersecting the curvature. Bending towards is further restricted.

In FIG. 9b (f), the curvature of the horizontal axis surface TP is made larger than the curvature of the vertical axis surface LP as in the case of FIG. 9b (e), and the curvature of the horizontal axis surface TP is obtained from the curvature (rM) of the inner portion. It is the figure which made the curvature (rL) of the outer part larger and cut by the horizontal axis plane TP. Since the curvature of the outer portion is steeper than that of the inner portion, the downward bending on the vertical axis surface LP is further restricted on the outer portion than on the inner portion.

The curvature of a curve is expressed as the curvature at a point on the curve. Therefore, the magnitude of the curvature of a plane curve on two dimensions can be compared by the curvature value of the point having the maximum curvature value in each plane curve. Alternatively, the curvature values can be obtained at all points on the curve and compared with the average.

FIG. 10 is a diagram showing footwear with a high heel for explaining the first embodiment of the present invention, and FIG. 11 is a diagram showing a main part of the footwear with a high heel disassembled in FIG. ..

The high heel footwear of the first embodiment of the present invention includes a foot fixation portion 1, an insole 3 (insole), a sole structure 5, an outsole 7 (outsole) and a heel 9 (heel).

The foot fixing portion 1 is a portion that covers the foot, has the shape of footwear, and is manufactured from leather or the like. The insole 3 is a portion that comes into direct contact with the sole of the foot. The bottom structure 5 can support the load of a pedestrian and at the same time maintain the shape of the footwear. Then, the insole 3 can be coupled above the bottom structure 5. The outsole 7 is coupled to the lower part of the bottom structure 5 so that the front side comes into direct contact with the ground. The heel 9 is coupled to the bottom structure 5 and serves to support the heel load of the foot.

The sole structure 5 of the embodiment of the present invention is a sole that supports the weight and acts as a frame of the footwear in footwear with a high heel, and is a midsole or an insole. ) Can be used in terms such as.

FIG. 12 is a perspective view showing the bottom structure 5 of the first embodiment of the present invention, and FIG. 13 is a side view of FIG. 12. In FIG. 12, the vertical axis line 5a and the horizontal axis line 5b displayed as virtual lines project a grid line onto the bottom structure 5 in order to express the degree of curvature (curvature) of the bottom structure 5. ). The vertical axis line 5a shown in FIG. 12 is a line projected onto the bottom structure 5 in the direction perpendicular to the ground, and is a line parallel to the vertical axis LA of the foot. The horizontal axis 5b shown in FIG. 12 is a line projected onto the bottom structure 5 in a direction perpendicular to the straight line AB (shown in FIG. 13), and is a line parallel to the horizontal axis TA of the foot. The straight line AB shown in FIG. 13 is a line connecting the rear end point PA of the bottom structure 5 and the rear end point PB of the front portion 11 supporting the ground, and is a straight line parallel to the vertical axis of the foot. .. Such a vertical axis line 5a and a horizontal axis line 5b form a grid line, which is projected.

As shown in FIGS. 12 and 13, the bottom structure 5 of the first embodiment of the present invention includes a front portion 11, a bending portion 13, and a rear portion 15.

The front portion 11 is a portion in which the front side of footwear with a high heel is supported by the ground during the loading response period.

In the first embodiment of the present invention, an example in which the front portion 11 is formed in a size that covers only a part of the portion supporting the ground will be illustrated and described. As shown in FIG. 11, when the bottom structure 5 of the first embodiment of the present invention is formed in such a size that the front portion 11 covers only a part of the portion supporting the ground, a separate auxiliary member is provided. Sb1 and Sb2 can be attached to the front portion 11.

The front portion 11 can include a ground support boundary line BL having a concave rounded boundary towards the front when the rear portion extending to the bending portion 13 is viewed in plan view.

The ground support boundary line BL of the front portion 11 is such that the front portion 11 is firmly supported by the ground to improve the stability of walking during the stance phase. Further, the front portion 11 can maintain the footwear shape by limiting the bending due to the shape of the ground support boundary line BL.

The banding portion 13 may consist of a one-way bending portion that bends only in the direction opposite to the ground or a bending curved surface portion that forms a concave curved surface in the direction opposite to the ground.

The bending portion 13 is preferably located at the posterior portion of the metatarsophalangeal joint MTP, extending from the ground support boundary line BL of the front portion 11. In other words, the bending portion 13 is preferably located on the heel side of the foot with reference to the ground support boundary line BL of the front portion 11. That is, the bending portion 13 may be arranged between the ground support boundary line BL of the front portion 11 and the boundary line formed by the midfoot portion MF and the forefoot portion FF (represented by dotted lines in FIGS. 13 and 15). can.

The bending portion 13 is formed from the bending curved surface portion, and the bending in the direction toward the ground side is restricted, and the bending portion 13 can flexibly bend in the direction opposite to the ground. That is, the bending portion 13 can bend in one direction toward the direction opposite to the ground.

The bending portion 13 is preferably composed of a bending curved surface portion having a concave curved surface in the direction opposite to the ground. Therefore, in the bending section 13, the vertical axis line 13a parallel to the bending section vertical axis center line 13ac (the virtual line displayed in the length direction in FIG. 12) and the horizontal axis line 13b parallel to the bending section horizontal axis center line 13bc. (The virtual line displayed in the width direction in FIG. 12) has a curvature formed in a concave shape in the direction opposite to the ground. In the description of the first embodiment of the present invention, the bending portion vertical axis center line 13ac is the center line passing through the vertical axis LA of the foot in the bending portion 13, and the bending portion horizontal axis center line 13bc is the lateral side of the foot. It is a center line that passes through the intermediate portion of the bending portion 13 in the width direction while being parallel to the axis TA.

It is preferable that the curvature r2 of the bending portion horizontal axis center line 13bc is formed larger than the curvature r1 of the bending portion vertical axis center line 13ac. Since the curvature means the change in the inclination of the tangent line that occurs when one point moves along the curve at a constant speed, the curvature of the plane curve is the point at the point on the curve. Expressed by curvature. Therefore, in the description of the present invention, "the curvature r2 of the bending portion horizontal axis center line 13bc is larger than the curvature r1 of the bending portion vertical axis center line 13ac" has the maximum curvature value at the bending portion horizontal axis center line 13bc. It means that the curvature value of the point is larger than the curvature value of the point having the maximum curvature value at the bending portion vertical axis center line 13ac. Alternatively, it means that the average of the curvature values of the banding portion horizontal axis center line 13bc is larger than the average of the curvature values of the bending portion vertical axis center line 13ac. Further, in comparing the magnitudes of such curvature values, it is natural that the curvature values at the boundary portion of the bending portion 13, particularly the boundary portion with the front portion 11 and the ends on both sides are excluded.

As described above, if the curvature r2 of the bending portion horizontal axis center line 13bc is formed larger than the curvature r1 of the banding portion vertical axis center line 13ac, as described in FIG. 9b (e), the vertical axis is downward. Bending towards is further restricted. The bending portion 13 bends in a concave shape in the direction opposite to the ground during the heel off and toe off periods after the mid-stance, and the bend toward the ground is restricted. In other words, the bending portion 13 bends in the same direction as the extension movement of the metatarsophalangeal joint (MTP), and in the same direction as the flexion movement of the metatarsophalangeal joint (MTP). You are restricted from turning.

Such a bending portion 13 extends the metatarsophalangeal joint (MTP) of the metatarsophalangeal joint during the heel off and toe off periods after the mid-stance during walking. It has the flexibility to bend in the same direction as the movement of the extension. Therefore, as with walking with bare feet, pedestrians can walk naturally during the heel off and toe off periods, even when wearing high-heeled footwear.

Further, since the bending portion 13 bends in the same direction as the movement of the bare foot at the time of heel off and toe off during walking, the rear portion 15 also moves upward, so that the foot It plays a role of preventing the heel from coming out of the foot fixing portion 1.

When the wearer wears a footwear with a high heel, the sole fascia PF (plattar fascia) is pulled tightly, and a force for flexion of the metatarsophalangeal joint (MTP) is generated (flexion). (Shown in FIG. 26). In particular, since the bottom of the footwear is off the ground during the swing phase, the flexion of the metatarsophalangeal joint (MTP) causes the anterior end of the footwear to move toward the ground. Can bend.

Since the bending portion 13 of the present invention is restricted from bending in the direction toward the ground during the swing phase, the movement in which the metatarsophalangeal joint (MTP) is flexed. Will also be restricted. Therefore, since sufficient toe clearance is provided during the swing phase, the tip of the footwear is not dragged or caught on the ground, and stable walking is performed.

On the other hand, the inner and outer edge portions of the bending portion 13 can form support reinforcing portions 13e and 13f that are further extended to both sides of the front portion 11 and the ground support boundary line BL. Since the support reinforcing portions 13e and 13f of the bending portion 13 extend upward from both side surfaces in the ground support boundary line BL in the round shape, they are bent in a concave shape in the direction opposite to the ground. Allowed, but can further limit bending towards the ground.

Therefore, the bottom structure 5 of the present invention has a metatarsophalangeal joint (MTP) during the heel off and toe off periods of the foot movement. Allows the movement of the extension more easily. Further, the bottom structure 5 of the present invention can further limit the flexion movement of the metatarsophalangeal joint (MTP) of the metatarsophalangeal joint during the swing phase. Therefore, a pedestrian wearing footwear with a high heel can walk with more stability.

In the present invention as described above, the bottom structure 5 can be formed from a simple structure, and the production cost and the manufacturing cost can be reduced. That is, the bottom structure 5 of the present invention extends the metatarsophalangeal joint (MTP) of the metatarsophalangeal joint during the heel off and toe off periods after the mid-stance. The movement of (extension) can be secured to the maximum. At the same time, the bottom structure 5 of the present invention is formed from a simple structure having a structure that limits the movement of the flexion of the metatarsophalangeal joint (MTP) during the swing phase. Therefore, it can be easily applied to footwear with high heels and the manufacturing cost can be reduced.

FIG. 14 is a view of the cross section of the bending portion 13 viewed from the front in the first embodiment, in which the curvature r2 of the bending portion horizontal axis center line 13bc is the curvature r3 of the outer portion 13c and the curvature of the inner portion 13d. It is divided into r4 and shown. FIG. 15 is a view cut along the vertical axis of the bottom structure 5 in the first embodiment.

In the first embodiment of the present invention, it is preferable that the bending portion 13 is formed so that the curvature r3 of the outer portion 13c is larger than the curvature r4 of the inner portion 13d. Such a bending portion 13 means that the inner portion 13d is more flexible than the outer portion 13c.

After the mid-stance, the heel 9 of the footwear is separated from the ground, so that only the front portion 11 of the bottom structure 5 comes into contact with the ground and the weight is loaded. Therefore, during the heel off and toe off periods, movement occurs in the remaining rear portion of the bottom structure 5 with the front portion 11 fixed to the ground. That is, the direction of movement of the rear portion 15 is determined by the difference in flexibility between the inner portion 13d and the outer portion 13c in the bending portion 13.

Therefore, in the bottom structure 5 of the present invention, the rear portion 15 extending rearward from the bending portion 13 in the heel off and toe off sections of the walking cycle is the front portion 11. Ascends upward (in the direction of the virtual line arrow in FIG. 15) and at the same time rotates and moves in the inner M direction (wisting movement, virtual line curve arrow in FIG. 14) and moves (virtual line straight arrow in FIG. 14). .. Therefore, in the heel off and toe off sections during the walking cycle, the rear portion 15 moves in the same direction as the heel varus and adduction of the foot. It will be like. That is, the structure in which the bending portion 13 has a curvature r3 of the outer portion 13c larger than the curvature r4 of the inner portion 13d has the same direction as the movement of the heel of the foot even when the pedestrian wears footwear with a high heel. The rear portion 15 of the bottom structure 5 can move. Therefore, a pedestrian wearing footwear with a high heel to which the bottom structure 5 of the present invention is applied can walk more stably.

The rear portion 15 is a portion that extends rearward from the bending portion 13 and can support the heel portion of the foot. As shown in FIG. 15, it is preferable that the rear portion 15 has a concave curved surface in the direction of the ground along the vertical axis and a concave curved surface in the direction opposite to the ground along the horizontal axis. As for the rear portion 15 of the present invention, bending is restricted in all directions by separating the bending direction on the horizontal axis and the vertical axis. Further, the rear portion 16 can be increased in thickness or a shank made of a solid material can be inserted or attached to limit bending.

Since the front portion 11, the bending portion 13, and the rear portion 15 are walked while wearing footwear with a high heel, the bottom structure 5 bends in response to the three-dimensional movement of the sole of the foot, so that stable walking is possible. Is. Further, the bottom structure of the present invention can be processed from a synthetic resin material of the same material, and the manufacturing cost can be reduced.

FIG. 16 is a diagram for explaining a process in which the bending portion 13 acts when walking while wearing footwear with a high heel to explain the first embodiment of the present invention.

FIG. 16A is a diagram showing a heel strike state during the walking cycle. FIG. 16A shows a state in which the bending portion 13 behind the metatarsophalangeal joint (MTP) or behind the front portion 11 supporting the ground does not bend toward the ground. Of course, the bending portion 13 does not bend toward the ground even during the swing phase. That is, in the bottom structure 5 of the present invention, the curvature r2 of the bending portion horizontal axis center line 13bc is made larger than the curvature r1 of the bending portion vertical axis center line 13ac, so that the heel strike and the swing period (swing) are formed. Does not bend toward the ground in phase). Further, in the bottom structure 5 of the present invention, the bending portion 13 and the front portion 11 may bend toward the ground during the heel strike and swing phase due to the support and reinforcing portions 13e and 13f of the bending portion 13. Further restricted. In other words, when walking in high-heeled footwear to which the sole structure 5 of the present invention is applied, a force is generated in which the toes are flexed toward the ground while the plantar fasciitis is pulled. , The action of the bending portion 13 prevents the bending portion 13 and the front portion 11 from bending toward the ground side.

Therefore, the bottom structure 5 of the first embodiment of the present invention exhibits a state of extension of the metatarsophalangeal joint during the swing phase and heel strike. Maintain and enable stable walking.

Then, in the bending portion 13, the front portion 11 comes to support the ground in the loading response immediately after the heel strike, and the bending is also limited at this time.

FIG. 16B is a diagram showing a mid-stance state during the walking cycle. FIG. 16B shows a state in which the front portion 11 supports the ground. The bending portion 13 does not bend in the midstance, as in the swing phase and heel strike.

FIG. 16 (c) is a diagram showing a heel off state during the walking cycle. FIG. 16 (c) shows a state in which the bending portion 13 behind the metatarsophalangeal joint (MTP) or the front portion 11 supporting the ground bends in the direction opposite to the ground. During the heel off period, the heel of the foot separates from the ground, but weight is continuously loaded on the ground through the metatarsophalangeal head MTBH. Therefore, the front portion 11 located in front of the ground support boundary line BL does not bend so as to be in contact with the ground, and the bending portion 13 located behind the ground support boundary line BL bends.

Since the bending direction of the bending portion 13 of the present invention is the same with respect to the vertical axis and the horizontal axis, the bending portion 13 bends while forming an upward concave curved surface at the time of heel off. Further, the bending portion 13 has a structure in which the curvature r2 of the bending portion horizontal axis center line 13bc is larger than the curvature r1 of the bending portion vertical axis center line 13ac at the time of heel off. Bending towards the ground along the intersecting vertical axis is further restricted.

Further, the rear portion 15 has a bending portion horizontal axis center line 13bc, and the curvature r3 of the outer portion 13c is larger than the curvature r4 of the inner portion 13d. It moves in response to movement. Therefore, the bottom structure 5 of the first embodiment of the present invention bends in the same direction as the extension movement of the metatarsophalangeal joint (MTP), similar to walking with bare feet, and at the same time, the varus of the foot. It bends in the same direction as the (inversion) and adduction (adduction) movements. Therefore, according to the first embodiment of the present invention, stable walking is performed even when walking while wearing footwear with a high heel.

Further, in the bottom structure 5 of the first embodiment of the present invention, as the bending portion 13 easily bends in the direction opposite to the ground, the rear portion 15 has the heel of the foot in the same direction as walking with bare feet. Can move and prevent the footwear from coming off the heel of the foot.

FIG. 17 shows the movement of the bottom structure 5 corresponding to the movement of the heel of the foot when viewed from the rear of the foot when the conventional footwear with a high heel and the footwear with a high heel of the first embodiment of the present invention are worn. It is a figure which compares and explains.

In FIG. 17A, in the state of wearing conventional footwear with a high heel, varus and adduction movements of the heel of the foot occur during the heel off period. At the same time, it shows a state in which the bottom structure of the footwear and the heel of the foot are separated from each other. Since the heel 9 is separated from the ground during the heel off period, the heel of the foot and the rear portion 15 of the bottom structure move separately from each other with respect to the ground G. Since the conventional bottom structure lacks flexibility and bends only upward even if it bends, the movement of the heel of the foot and the movement of the bottom structure do not match. That is, as shown in FIG. 17 (a), the axis AH of the heel of the foot does not coincide with the axis AHS of the heel 9 of the shoe.

On the other hand, in FIG. 17B, the rear portion 15 of the bottom structure 5 is attached to the foot during the heel off period while wearing the high heel footwear of the first embodiment of the present invention. Shows the state of movement in the same direction as the movement of the heel. The rear portion 15 of the first embodiment of the present invention can easily move upward by the action of the bending portion 13 of the first embodiment described above, and at the same time, the varus of the heel of the foot ((b) in FIG. 17). Corresponds to the movement of the arrow (i) of the virtual line curve in the above direction and the adduction (the arrow (a) of the virtual line straight line in FIG. Therefore, the axis AH of the heel of the foot and the axis AHS of the heel 9 of the shoe come to coincide with each other, and the stability of walking can be improved.

FIG. 18 is a diagram shown for explaining the second embodiment of the present invention. FIG. 19 is a cross-sectional view of the bending portion 13 of the bottom structure 5 of FIG. 18 cut along the center line of the horizontal axis. FIG. 20 is a cross-sectional view of the bottom structure 5 of FIG. 18 cut along the center line of the vertical axis. FIG. 21 is a diagram in which the auxiliary member Sb is attached in the second embodiment. Only the differences between the second embodiment of the present invention and the first embodiment will be described, and the same parts will be replaced by the description.

The bottom structure 5 of the second embodiment of the present invention further enhances the one-way flexibility of the bending portion 13, and determines the degree of bending between the inner portion 13h (medical side portion) and the outer portion 13i (lateral side portion). To make it different, the bending portion 13 may be provided with at least one or more bending adjusting recesses 13g.

In the second embodiment of the present invention, an example including one bending adjusting recess 13g will be illustrated and described.

The bottom structure 5 of the second embodiment of the present invention is provided with a bending adjusting recess 13g in the center of the bending portion 13 to reduce the thickness, whereby the one-way flexibility of the bending portion 13 can be further enhanced. In other words, the bending portion 13 can be configured to have a thickness T1 at the center portion thinner than the thicknesses T2 and T3 at the edges. Further, in the bending portion 13, the thickness T2 of the inner edge is made thinner than the thickness T3 of the outer edge, and the varus of the heel of the foot is varus at the time of heel off and toe off. (Inversion) and adduction (adduction) movements can be made to respond more smoothly. In the above-mentioned first embodiment of the present invention, an example in which the boundary portion BL between the front portion 11 and the bending portion 13 is formed of a round (curved) shape line has been described, but the front portion of the second embodiment of the present invention has been described. At the boundary between the 11 and the bending portion 13, the front portion 11 and the bending portion 13 may be connected by a smooth curved surface.

Then, as shown in FIG. 20, the thickness of the front portion 11 can be gradually reduced toward the front side. In such a case, as shown in FIG. 21, even if the auxiliary member Sb is attached to the lower side of the front portion 11, the step generated at the boundary portion between the front portion 11 and the auxiliary member Sb can be minimized. .. Therefore, it is possible to reduce the manufacturing process of footwear with a high heel by omitting a separate auxiliary member. In addition, the auxiliary member Sb can use the material used for the part that supports the ground in the conventional bottom structure, and can be realized with various designs according to the size and shape of the pedestrian's foot. Can be done.

FIG. 22 is a diagram showing a bottom structure 5 for explaining a third embodiment of the present invention. The third embodiment of the present invention describes only the differences from the bottom structure 5 of the first embodiment, and the same parts are replaced by the description.

In the third embodiment of the present invention, if the front portion 11 is extended toward the toe side, that is, forward, the entire support portion can be covered. That is, in such a third embodiment of the present invention, the front portion 11 and the auxiliary member Sb are integrally configured when compared with the first embodiment. That is, in such a third embodiment of the present invention, the auxiliary member Sb can be omitted and the bottom structure 5 can be manufactured in one step to reduce the number of parts.

FIG. 23 is a diagram shown for explaining the fourth embodiment of the present invention, and shows the bottom structure 5. The fourth embodiment of the present invention will be described only in terms of differences from the above-described embodiment, and the same parts will be replaced by the description.

The bottom structure 5 of the fourth embodiment of the present invention further enhances the one-way flexibility of the bending portion 13, so that the degree of bending between the inner portion (medical side portion) and the outer portion (lateral side portion) is different. The bending portion 13 may be provided with at least one bending adjusting hole portion 13j, 13k.

At the boundary portion of the bending adjustment hole portion 13j, 13k or the bending adjustment recess 13g, as in the case where the bending adjustment hole portion 13j, 13k of the fourth embodiment of the present invention and the bending adjustment recess 13g of the second embodiment are provided. Very large curvature values can occur. Therefore, in comparing the magnitudes of the curvatures of the bending portion horizontal axis center line 13bc and the bending portion vertical axis center line 13ac, it is natural that the curvature value at such a boundary portion is excluded.

In the fourth embodiment of the present invention, the bending adjustment hole portions 13j and 13k can be formed in the bending portion 13 to further facilitate one-way bending of the bending portion 13.

Further, in the fourth embodiment of the present invention, the size of the bending adjustment hole portion 13j formed in the inner portion (medical side portion) is changed to the size of the bending adjustment hole portion 13k formed in the outer portion (lateral side portion). It can be made larger than that. In such a fourth embodiment of the present invention, at the time of heel off and toe off, the rear portion 15 has an inversion and adduction of the heel of the foot (inversion) and adduction (toe off). It can be made to move in response to the movement of addition). Further, the bending adjustment hole portions 13j and 13k can be formed by forming a large number of holes having a smaller size, and by forming the holes at different sizes, intervals and the number thereof, the degree of bending can be adjusted. Can be different. It is shown that such a fifth embodiment of the present invention can also be variously configured in order to achieve the object of the present invention.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to this, and is variously modified and carried out within the scope of claims, the detailed description of the invention, and the attached drawings. It is possible to do so, and it is natural that this also belongs to the scope of the present invention.

Claims (16)

Front part that supports the ground,
The bottom structure of high-heeled footwear, including a bending section that extends from the front section and is located posterior to the metatarsophalangeal joint and bends in the direction opposite to the ground, and a rear section that extends from the bending section. thing. The bottom structure of footwear with a high heel according to claim 1, wherein the bending portion is composed of a bending curved surface portion forming a concave curved surface in a direction opposite to the ground. The bending curved surface portion is drawn along a line that is parallel to the horizontal axis of the foot and intersects the bending portion vertical axis center line, as compared with the curvature of the bending portion vertical axis center line drawn along the vertical axis of the foot. The bottom structure of a foot with a high heel according to claim 2, wherein the curvature of the horizontal axis center line of the bending portion to be formed is formed to be larger. The bending portion bends in a concave shape in the direction opposite to the ground in the section between the heel off and the toe off during the walking cycle, and the ground during the swing phase during the walking cycle. The sole structure of a high-heeled foot according to claim 1, wherein bending in the direction of the side is restricted. The bending portion bends at the section between the heel off and the toe off during the walking cycle, and the rear portion is the foot in the direction of the varus of the foot and the adduction of the foot. The sole structure of a high-heeled foot according to claim 1, which corresponds to the movement of the foot. The bottom of footwear with a high heel according to claim 3, wherein the center line of the horizontal axis of the bending portion is formed so that the curvature of the outer portion (lateral side portion) is larger than the curvature of the inner portion (medical side portion). Structure. The bottom structure of footwear with a high heel according to claim 1, wherein the bending portion is formed so that the thickness of the outer portion (lateral side portion) is thicker than the thickness of the inner portion (medial side portion). The banding portion is claimed to include at least one bending adjustment hole portion or a bending adjustment recess that makes the degree of bending of the inner portion (medical side portion) and the outer portion (lateral side portion) different. The bottom structure of the footwear with a high heel according to 1. In high-heeled footwear with a bottom structure
The bottom structure is
Front part supported by the ground,
High-heeled footwear that extends from the front and is located posterior to the metatarsophalangeal joint and includes a bending that bends away from the ground and a rear that extends from the bending. The footwear with a high heel according to claim 9, wherein the bending portion is composed of a bending curved surface portion forming a concave curved surface in a direction opposite to the ground. The bending curved surface portion is drawn along a line that is parallel to the horizontal axis of the foot and intersects the bending portion vertical axis center line, as compared with the curvature of the bending portion vertical axis center line drawn along the vertical axis of the foot. The foot with a high heel according to claim 10, wherein the curvature of the horizontal axis center line of the bending portion to be formed is formed to be larger. The bending portion bends in a concave shape in the direction opposite to the ground at the time of heel off and toe off during the walking cycle, and the free leg during the walking cycle. The high-heeled footwear according to claim 9, wherein bending toward the ground side is restricted during the period. The banding portion bends in the section between the heel off and the toe off during the walking cycle, and the rear portion moves in the direction of the varus of the foot and the adduction of the foot. The high-heeled footwear according to claim 9, which corresponds to the movement of the foot. The footwear with a high heel according to claim 11, wherein the center line of the horizontal axis of the bending portion is formed so that the curvature of the lateral side portion is larger than the curvature of the medial side portion. The footwear with a high heel according to claim 9, wherein the bending portion is formed so that the thickness of the outer portion (lateral side portion) is thicker than the thickness of the inner portion (medial side portion). Claimed, wherein the bending portion includes at least one bending adjustment hole portion or a bending adjustment recess that makes the degree of bending of the inner portion (medical side portion) and the outer portion (lateral side portion) different. High-heeled footwear as described in 9.

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