JP2015509384A - Sole for gait correction or gait preservation - Google Patents

Abstract

The present invention provides a shoe sole 1 suitable for a shoe product. The shoe sole 1 includes a heel part 3, a middle foot part 4, a mother-child ball part 5, and a forefoot part 6 along the shoe bottom in order from the back to the front. The buttocks, middle feet, and mother and child spheres are each adjacent to the lower arch region of the foot arch wearing the sole. The shoe sole includes a first shoe sole portion 11 and a second shoe sole portion 12. The first shoe sole portion 11 extends along a substantially S-shaped line G for optimal ground contact during walking or running, and extends from the buttocks to the forefoot portion through the middle foot portion and the mother and child ball portion. The second shoe sole 12 extends on both sides of a substantially S-shaped line. The local thickness T and / or local hardness H of the first shoe sole portion 11 is larger than the local thickness T and / or local hardness H of the second shoe sole portion 12 adjacent to the first shoe sole portion. . [Selection] Figure 3

Description

  The present invention relates to a shoe sole suitable for a shoe product.

  Typically, such a sole includes, in order from the back to the front, a heel part, a middle foot part, a mother-child ball part, and a forefoot part along the sole. The buttocks, middle feet, and mother and child spheres are each provided adjacent to the arch region under the arch of the foot wearing the shoe sole.

  By using such a sole, a foot cushion element is used to attenuate a shock from the ground mainly during running or walking, or a part of the sole, middle foot, mother-child ball and front foot or Sole and / or support element (in order mainly to stabilize the foot and deter or at least minimize the tilt of the foot in the direction transverse to the running or walking direction (length direction)) The comfort of the user is improved by being distributed over the entire lower surface.

  When a shoe equipped with such a sole is worn for a long time, the wearer of these shoes does not actively walk correctly. Eventually, many such wearers forget their natural or “right” way of walking. It has been found that if unnatural or “inaccurate” walking continues for extended periods of time, adverse effects on the whole body (eg, knee, hip and back problems) can occur. On the other hand, it has been found that if the natural way of walking can be “rediscovered”, many problems in the wearer's body can be reduced and even eliminated.

  It has been found (except for short-distance running) that the steps that are actually natural for all people, that is, “correct”, are performed in the following order:

  First, the first foot is in contact with the ground with the heel, or the heel and the middle foot are in contact with the ground at the same time. -The first foot then begins to roll on the ground with a slight foot deformation (ideally without slipping) and the sole of the first foot is the buttocks or midfoot, Contact with the ground in the order of the part and forefoot part.

  -At the end of this first foot roll action, at the same time as the first foot lifts off the ground, the second foot first touches the ground with the heel or simultaneously touches the ground with the heel and the middle foot.

  -The second foot then starts to roll on the ground with a slight foot deformation (ideally without slipping) and the shoe sole of the second foot is the buttocks or middle foot, the mother-infant ball Contact with the ground in the order of the part and forefoot part.

  -At the end of the second leg roll action, the first leg again touches the ground first with the heel or simultaneously with the ground with the heel and the middle foot at the same time as the second leg lifts off the ground. This sequence continues.

  As the foot alternately contacts the ground as described above, a narrow or wide blurred ground contact line is drawn on the sole of each foot. For people who have healthy bones, tendons, muscles and nerves, and who walk naturally, this optimal ground contact line is typically an approximately S-shaped line at the sole of each foot, Starting from the front, through the middle foot and the mother-to-child ball, and typically in the forefoot (inside the first and second toe bones and the forefoot in the first toe and second toe regions) It extends to the part.

  An object of the present invention is to assist in drawing this optimal ground contact line during walking and running.

  The shoe sole provided by the present invention is suitable for shoe products. The sole includes, in order from the back to the front on the ground contact surface, along the sole, and includes a buttocks, a middle foot, a mother and child ball, and a forefoot. Adjacent to the lower arch area of the foot arch when worn, and the sole includes a first sole portion extending along a generally S-shaped line for optimal ground contact during walking or running, the line being Starting from the upper part, it extends along the middle foot part and the mother and child ball part, and ends at the front foot part. The shoe sole includes a second shoe sole portion extending along both sides of the substantially S-shaped line. The local thickness and / or local hardness of the first sole part is greater than the local thickness and / or local hardness of the second sole part adjacent to the first sole part. According to the invention, the shoe sole includes an insole. The insole is fixed to the foot contact surface or is embedded directly under the foot contact surface of the shoe sole. The insole has a width extension portion narrower than the shoe sole and extends along a substantially S-shaped line.

  Since the insole is provided at or near the foot contact surface of the sole, in a pedestrian or runner wearing a shoe with the sole according to the present invention, the insole is provided between the insole and the lower surface of the foot. Pressure increases or concentrates. As a result, the pedestrian or runner feels a substantially S-shaped line as a pressure line on the lower surface of his / her foot.

  Good in each foot due to this thickness profile and / or hardness profile of the shoe sole in the local length direction along the generally S-shaped line of optimal ground contact or in the cross-sectional direction across the tangential direction A person wearing a fixed shoe sole of the present invention may have a point placed on this line (the first shoe sole portion) other than the point placed outside this line (ie, a point off this line ( Because you feel more “pressure” or “support” from the second shoe sole), you will experience “instantaneous feedback” and “feel” whenever you deviate from the optimal ground contact line when walking or running.

  The expressions “pressure” or “support” or “pressure” or “support force” are used synonymously in the text and are all defined as the average measuring force per unit area. This force is measured using a force sensor that senses in the vertical direction with a horizontal planar force receiving surface having a defined area. The value of “pressure” or “support” or “pressure” or “support force” is calculated as “measured normal force acting on the force receiving surface divided by the area of the force receiving surface”. Typical bearing force values are the static bearing force measured when standing or the instantaneous dynamic bearing force measured when walking (more specifically, the ground contact area of the sole when the foot rolls on the ground) It can be related to the reaction force (ground force) acting locally in the interior. Tilt the foot laterally (outward) or in the middle as long as it is in the direction of the dynamic force vector due to static weight and dynamic force during each foot roll movement through the optimal ground contact line Tilt movement that tilts in a direction (inward) (ie, in a direction crossing the walking or running direction relative to the tibia) is zero or at least hardly occurs.

  However, if the direction of the dynamic force vector due to the static weight and dynamic force during the roll motion of each foot does not pass through the optimal ground contact line, a certain tilt motion occurs on the foot and the foot Tilted in a direction (ie, in a direction crossing the walking or running direction with respect to the tibia). Such a lateral or intermediate inclination of the foot with respect to the tibia is easily detected / perceived / sensed by a human, so that the above feedback is provided to a pedestrian or runner wearing the shoe sole of the present invention. The

  As a result, a person wearing a well-fixed sole of the present invention on each foot can reposition his / her whole body slightly each time he deviates from the optimum ground contact line (change of posture) And thus walking changes = walking corrections). As a result, the person is consciously positive and dynamic “balanced” with each foot on the corresponding optimal ground contact line defined by the sole hardness and / or sole thickness during the roll action. You can take more or less "action". In such a dynamically balanced or feedback controlled roll motion of each foot, multiple parts of the body (ie, ankle, knee, hip joint, spine and associated tendons, muscles, nerves) Used to give a beneficial effect on the whole body.

  The insole that extends along the generally S-shaped line and contacts the foot provides the feedback described above for the pedestrian or runner. Thus, a pedestrian or runner can detect that his / her foot or the other above-mentioned body part deviates from its ideal position and movement during walking or running. (Proprietary acceptance). Preferably, the insole is composed of a material having a hardness that is higher than the hardness of the sole material around the insole.

  By using such a harder insole, the pedestrian or runner specific acceptance is further improved. In addition, since the structural stability (shape stability) of the shoe sole is improved, the wear of the shoe sole or the early loss of the overall rigidity is prevented.

  In addition to the first insole described above, the second insole is preferably provided on the other side, and may be arranged at intervals along the thickness direction of the shoe sole. By using two insoles of similar or different hardness, the structural stability of the sole can be adjusted. Instead of or in addition to one or two insoles, a damping insole (insert) can be embedded in the sole. Such a damping insole can be constructed from a foam material and can include a damping fluid.

  In the first embodiment of the sole according to the present invention, the local thickness of the first sole part (i.e. the part placed on a substantially S-shaped line of optimal ground contact or the "on line" part) is: Greater than the local thickness of the second shoe sole adjacent to the first shoe sole portion (ie, the portion adjacent to or substantially “off the line” of the generally ground-shaped line of optimum ground contact) and the first shoe The bottom portion and the second shoe sole portion may have the same hardness. As a result, it is possible to configure the first shoe sole portion and the second shoe sole portion with one kind of material (for example, by injection molding one kind of material with one mold). Of course, for each transverse "set" consisting of a first (on the line) part and one or two second (off-line) parts (typically on each side of the generally S-shaped line) It is possible to use a specific material having a specific hardness. In this way, a hardness profile with different hardness values can be defined along the generally S-shaped line by all transverse pairs aligned in a vertical manner along the generally S-shaped line ( Ie hardness profile "along the line"). Thus, individualized soles constructed by using sets of different materials, having different shapes, and aligned "along line" can be obtained. Once aligned, these individual sets can be permanently joined together by attachment and / or permanently joined to a common sole portion (e.g., an intermediate sole) by gluing or welding. In the first embodiment, the entire shoe sole may be formed from one type of material having one hardness value. As a result, the entire shoe sole (ie, all pairs) is aligned and spaced along the line so that it is constructed using only one molding process (eg, injection molding). .

  Suitably, in the first embodiment, the shoe sole includes a raised portion. The raised portion protrudes from the lower surface facing the ground and extends along at least a substantially S-shaped line portion. As a result, the person wearing this sole on each foot is more likely to be placed on this protruding line (first shoe sole portion) than on the point away from the protruding line (second shoe sole). I feel a lot of pressure / support. If a person moves his or her own dynamic force vector due to static weight and dynamic force when each foot rolls, the dynamic vector will not pass through this protrusion line, Experience and “feel” the “instantaneous feedback” described above when walking or running each time you deviate from the ground contact protrusion line.

  The ridges may have different cross-sectional shapes (ie different thickness profiles). With such different cross-sectional shapes, different levels of techniques may be required to dynamically balance on this line when walking or running.

  In the first modification of the first embodiment, the raised portion may have a trapezoidal cross section (trapezoidal thickness profile) in a plane orthogonal to the substantially S-shaped line. The first trapezoid baseline defines a plateau-like region on the sole surface, and the second trapezoid baseline defines a sloped transition region between the trapezoid ridge and the sole bulk (remaining). The second trapezoid baseline is longer than the first trapezoid baseline. As long as the dynamic force vector passes through the plateau region (thicker region), the person feels strong support from the shoe sole. When the dynamic force vector passes through one of the sloped transition regions (thickness reduction regions), the support on either side of the plateau region is weakened, and the person may experience a slight decrease in support at the ankle joint. Feel with the inclination of. In the second modification of the first embodiment, the raised portion may have a rectangular cross section (rectangular thickness profile) in a plane orthogonal to the substantially S-shaped line. A plateau-like region is defined, and the second rectangular baseline defines a rapid transition region (ie, a very tight slope) between the rectangular ridge and the bulk of the shoe sole (the rest), and the second rectangular baseline is Has the same length as the rectangular baseline. Again, as long as the dynamic force vector passes through the plateau region (thicker region), the person feels strong support from the shoe sole. Immediately after the dynamic force vector passes through or exceeds one of the rapid transition regions with weaker support on either side of the plateau region, the person is probably stronger in the ankle Feeling stronger support decline with tilt (stronger tilt than with trapezoidal cross section).

  The first region using the trapezoidal thickness profile and the second variation using the rectangular thickness profile define a platform-like region on the shoe sole surface. The surface of this plateau region is preferably a flat surface and may be substantially parallel to the substantially flat upper surface of the sole on which the foot rests.

  However, in both the first and second modifications, preferably the planar surface of this plateau region can be inclined with respect to the substantially planar upper surface of the sole on which the foot is placed. In other words, the ridge then has a non-trapezoidal or non-rectangular thickness profile rather than one of the trapezoidal or rectangular profiles described above. The angle between the surface and the top surface of the plateau is such that the sole thickness decreases from the outside ("outside of the foot") to the inside ("inside of the foot") (or vice versa) It is an angle. As a result, when such a shoe sole is worn during walking or running, the sole of the foot is placed on the ground due to the action of balancing the person during walking or running During each roll action of the foot with the state or shoe sole resting on the ground, an inward tilt of the foot and tibia or an outward tilt of the foot and tibia occurs. A shoe sole having a plateau-like region tilted outward (thinner on the outside) can be used for correcting walking of a person with an O-leg, and a shoe having a plateau-like region inclined inward (thinner on the inside) The bottom can be used to correct the walking of a person with X legs.

  Preferably, these plateau ground contact areas that are inclined with respect to the substantially planar upper surface of the sole are provided at least in the midfoot, but preferably in the midfoot, the mother and the ball of the sole. And only in the forefoot.

  Also, the plateau-like region can extend all the way to the outer boundary of the shoe sole, at least in the vertical portion of the bottom sole surface (preferably in the midfoot). In addition, the plateau region can extend all the way to the outer boundary of the shoe sole within the heel and / or the mother and child sphere.

  In the third modification of the first embodiment, the raised portion may have a curved cross section (curved convex thickness profile) on a plane orthogonal to the substantially S-shaped line, or a curved line. Defines a beaded or lenticular region of the sole surface, and a baseline defines a transition region between the bend and ridge and the sole bulk. This curved convex cross-sectional thickness profile makes it more difficult to dynamically balance on a strong support line than in the case of a rectangular thickness profile. The reason for this is that due to the deformation (local compression) of the curved convex ridge due to the dynamic force vector acting on this ridge (human “static + dynamic weight”) This is because there is no front plateau region as in the case of the rectangular cross-sectional thickness profile, and only a narrow plateau region is present. Even if the direction of the dynamic force vector deviates very slightly from this “support direction” passing through the narrow plateau area, it is probably due to a much stronger slope at the ankle (stronger than in the case of a rectangular section). The person feels a significant decline in support. By increasing the hardness of the material, this dynamic balancing action becomes more difficult and challenging. This can be considered to be the same as when a pedestrian walks on a single stretched rope in the case of a stretched rope.

  In the fourth modified example of the first embodiment, the raised portion includes a curved concave portion within a convex cross section (locally has a curved concave thickness profile portion on a surface orthogonal to the substantially S-shaped line. Or a global convex thickness profile). This type of thickness profile is often referred to as a “cantilever profile” or “bridge profile”. This profile defines a troughed or grooved region within the ridge of the sole surface (ie, the troughed or grooved region is the first raised ridged region on one side (inner side) of the thickness profile and Surrounded by a second raised ridge-like region on the other side (outside) of the thickness profile). In addition, the ridge may have a transition region that decreases in thickness between at least one of the ridge-like regions on one side and the bulk (remaining) of the shoe sole on the other side. This “cantilever” or “bridge” thickness profile provides a dynamic balance on a stronger support line than is the case with the corresponding curved or convex thickness profile or rectangular thickness profile or even trapezoidal thickness profile Becomes easier and therefore less difficult. Again, as in the case of trapezoidal or rectangular cross-sectional thickness profiles, there is no previous plateau-like region, but the relative ridge-like portions of the ridges on either side of the trough-like or ridge-like portions on the ridges. Due to strong local compression and relatively weak local compression or no compression in all the concave trough-like or groove-like portions of the ridge, a wide rear plateau region is formed. In contrast to the simple curved convex cross section thickness profile described above, the rectangular thickness profile or even the trapezoidal thickness profile is more distributed or non-reduced by the more intensively compressed ridges. A stronger support is obtained than in the case of a compressed trough or groove. Therefore, the dynamic force vector (human “static + dynamic weight”) acting on this ridge is more intensively compressed from the “support direction” passing through the uncompressed ridge region in a more dispersed or uncompressed manner. Deviating toward one of the ridges, the person feels a significant increase in support, making it easier to hold the dynamic force vector between the ridges, resulting in a cantilever or Walking at this deformable ridge using the bridge thickness profile is much easier (ie, dynamic balancing is easier).

  This cantilever or bridge thickness profile can be considered as two adjacent curved convex profile thickness profiles in the special case where the thickness between the ridge-like regions and the bulk (remaining) thickness of the sole is the same. (Ie, two bead-like or ridge-like ridges that are parallel to each other because they are each arranged along a substantially S-shaped line). Also in this case, the dynamic balancing action becomes easier in this way because the pedestrian on the stretched rope is placed on two parallel stretched ropes that are arranged at a small interval. It can be regarded as giving the same effect as when walking.

  Regardless of the cross-sectional shape (ie, different transverse thickness profiles for a generally S-shaped line), the ridges are non-uniform longitudinal thickness measured along a portion along the generally S-shaped line. You may have a profile.

  Preferably, the ridge of the raised portion may be thinner than the midfoot portion of the raised portion, or vice versa.

  Preferably, the thickness of the heel portion of the raised portion may be thinner than the mother and child ball portions of the middle foot portion and the raised portion, or vice versa.

  To balance dynamically on this defined thickness line during walking or running, using a non-uniform longitudinal thickness profile of the ridge, by combining with different cross-sectional shapes (ie different transverse thickness profiles) You can fine-tune different levels of skill.

  In the second embodiment of the shoe sole according to the present invention, the local hardness of the first shoe sole portion is higher than the local hardness of the second shoe sole portion adjacent to the first shoe sole portion. The first shoe sole and the second shoe sole have the same thickness. In this case, the first shoe sole portion and the second shoe sole portion of each “set” are made of different materials. Each of these transverse “sets” has a first (on line) portion and one or two second (offline) portions (typically one on each side of the generally S-shaped line). The higher hardness material has the first hardness used for the portion on the line, and the softer material having the second hardness lower than the first hardness is off the line. Used for each part. Also in this case, as in the first embodiment, all of these transverse groups are aligned in the length direction along the substantially S-shaped line, and the hardness profiles using different hardness values are substantially S-shaped. It can be defined along a line (ie, a hardness profile “along the line”). Thus, individualized soles can be constructed using sets composed of different materials, having different shapes, and aligned “along the line”. Again, after alignment, these individual sets are permanently joined together by attaching them to each other and / or by attaching or welding to a common sole portion (eg, intermediate shoe sole). Can do.

  In this second embodiment, the entire sole may have substantially the same thickness as a “normal” shoe and may have a sole similar to a “normal” shoe.

  Preferably, in this second embodiment, the shoe sole includes a hard region. This hard region has a higher hardness than the soft region around the sole and extends at least along the portion of the substantially S-shaped line. As a result, a person wearing this sole on each foot will have more pressure / support than this higher hardness (rather than away from the harder material line (second shoe sole)). Feel from the point placed on the material line (first shoe sole part). Each time the person moves his or her own dynamic force vector (due to the static weight and dynamic force during each leg roll), this dynamic vector passes through this harder material line. Each time he deviates from this higher hardness material line for optimal ground contact during walking or running, he again experiences and “feels” the “instantaneous feedback” described above.

  Because this higher hardness material line may have a different cross-sectional hardness profile, different levels of skill may be required to balance dynamically on this line when walking or running.

  In the first modification of the second embodiment, the hard region has a trapezoidal hardness profile in a plane orthogonal to the substantially S-shaped line. This trapezoidal hardness profile defines a maximum hardness core region and a hardness reduction transition region on both sides of the core region. The hardness decreases from the maximum hardness toward the softer region of lower hardness. As long as the dynamic force vector passes through the maximum hardness core region (higher hardness region), the person feels strong support from the sole. Immediately after the dynamic force vector has passed through one of the reduced hardness transition regions with weaker support on either side of the maximum hardness core region, the person has a slight support, possibly due to a slight inclination of the ankle joint. I feel a drop again.

  In the second modification of the second embodiment, the hard region has a rectangular hardness profile in a plane orthogonal to the substantially S-shaped line. This rectangular hardness profile defines a maximum hardness core region and defines regions having lower hardness soft regions on both sides of the core region. Again, as long as the dynamic force vector passes through the maximum hardness core region (higher hardness region), the person feels strong support from the shoe sole. Immediately after the dynamic force vector passes through one of the rapid transition regions or exceeds those regions with weaker support on either side of the maximum hardness core region, the person is again likely to be stronger A decrease in support due to an inclination (a stronger inclination than that of a trapezoidal cross section) is felt at the ankle joint.

  In both the first variation using the trapezoidal hardness profile and the second variation using the rectangular hardness profile, the maximum hardness core region of the shoe sole surface is defined. The hardness profile (ie, the cross-sectional hardness distribution within this core region) is preferably a straight line that is substantially parallel to the substantially planar upper surface of the sole on which the foot rests.

  However, in both the first and second modifications, the straight line of the hardness profile in the core region is preferably inclined with respect to the substantially planar upper surface of the sole on which the foot is placed. . In other words, the cross-sectional hardness distribution then has a non-trapezoidal or non-rectangular hardness profile (rather than one of the trapezoidal or rectangular profiles described above). The angle between the straight line of the hardness profile in the core area and the top surface is the sole hardness value decreasing from the side ("outside of the foot") to the middle ("inside of the foot") or The opposite is also true. Also in this case, as a result, when such a shoe sole is worn during walking or running, the sole of the foot is placed on the ground due to the action of balancing the person during walking or running. When the foot is rolled or when the shoe sole is placed on the ground, the foot and tibia are tilted inward or the foot and tibia are tilted outward. Using a shoe sole where the hardness value in the core region decreases toward the outside (softer toward the outside), it is possible to correct the walking of a person with an O-leg, and the hardness value in the core region is inward Using a shoe sole that decreases toward the inside (softer toward the inside), it is possible to correct the walking of a person with X legs.

  Preferably, these hard core ground contact areas with a linear hardness profile inclined relative to the substantially planar upper surface of the sole are provided at least in the midfoot, but preferably the midfoot of the sole It is provided only in the head part, the mother and child ball part, and the forefoot part.

  Further, the core region including the linear hardness value distribution can extend all the way to the outer boundary line of the shoe sole, at least in the vertical portion (preferably the midfoot portion) of the bottom shoe sole surface. In addition, within the heel part and / or within the mother and child ball part, the core region containing the linear hardness value distribution can also extend all the way to the outer boundary of the shoe sole.

  In the third modification of the second embodiment, the hard region may have a curved and convex hardness profile on a surface orthogonal to the substantially S-shaped line. This curvilinear hardness profile defines a hardness maximum and defines a hardness reduction transition region on both sides of the hardness maximum. The hardness decreases from a maximum hardness to a softer region of lower hardness. Again, in this case, it becomes more difficult to balance dynamically on a strong support line than in the case of a rectangular hardness profile. The reason for this is that there is no previous maximum hardness core region as in the case of trapezoidal or rectangular cross-section hardness profiles, but instead a dynamic force vector (human “static + This is because there is only the maximum hardness core region after narrowing due to deformation (local compression) of the curved and convex hardness profile due to “dynamic weight”). Even if the direction of the dynamic force vector is narrow and deviates slightly from this “support direction” that passes through the maximum hardness core region afterwards, the person is probably much more inclined at the ankle joint (than in the case of a rectangular cross section). In this case as well, we feel a significant decline in support. By increasing the overall hardness of the material, this dynamic balancing action becomes more difficult and challenging. In this case as well, the above can be regarded as a case where a pedestrian is walking on one single stretched rope in the case of a stretched rope.

  In the fourth modified example of the first embodiment, the hard region has a curved concave hardness profile portion substantially within the convex cross-sectional hardness profile (globally convex hardness profile and locally curved concave hardness profile portion). You may have in the surface orthogonal to a S-shaped line | wire. This type of hardness profile is also referred to as a “cantilever profile” or “bridge profile”. This profile defines a local trough or groove of a relatively soft material (locally concave hardness profile) within the entire hard core area (globally convex hardness profile) of the sole surface (ie, relatively soft The trough-like or groove-like portion of the material has a first region of relatively hard material on one side (inside) of the hardness profile and a relatively hard material on the other side (outside) of the hardness profile. Surrounded by the second region). In addition, the hard overall hard core region may have a transition region that decreases in hardness between at least one of the two relatively hard regions and the bulk of the other sole. . This “cantilever” or “bridge” hardness profile can dynamically balance on a stronger support line than the corresponding curved or rectangular thickness profile or even a trapezoidal thickness profile. It will be easier and thus less difficult. Again, as in the case of trapezoidal or rectangular cross-sectional thickness profiles, there is no previous hard core region, but the overall hard core region has a global shape on both sides of the relatively soft material trough or groove. Relatively strong local compression of each of the two regions of relatively hard material in the hard core region and relatively weak local compression in all troughs or grooves of the relatively soft material of the entire hard core region, or Due to no compression, a wide rear hard core region is formed. In contrast to the convex cross-section hardness profile, the rectangular hardness profile or even the trapezoidal hardness profile using only the curves described above, the two more intensively compressed regions of a relatively hard material allow a relatively soft A higher support is obtained than in the more dispersed or uncompressed trough or grooved portion of the material. Thus, the dynamic force vector (human “static + dynamic weight”) acting on this overall hard core region (of the “static + dynamic weight”) is relatively more dispersed or uncompressed through the overall hard core region. When deviating from the “support direction” (which extends towards one of the more intensively compressed areas), the person feels a sudden increase in support and is dynamic between the two areas of relatively hard material. It is easier to hold the force vector, and thus much easier to hold the gait on this deformable overall hard core region using a cantilever or bridge hardness profile (ie, dynamic balancing behavior is Easier).

  In the special case where the thickness between the two regions of relatively hard material and the bulk (residual) hardness of the sole is the same, this cantilever or bridge hardness profile is two curved convex shapes adjacent to each other. It can also be considered as a cross-sectional hardness profile (ie, each of the two longitudinally extending hard core regions arranged along a generally S-shaped line and thus parallel to each other). In this way, the dynamic balancing action becomes easier when a pedestrian walks on two ropes stretched in parallel and spaced apart in the case of a stretched rope. The same can be considered.

  Regardless of the cross-sectional hardness profile (ie, different transverse hardness profiles for a generally S-shaped line), the hard core region also has a non-uniform longitudinal hardness profile measured along the portion following the generally S-shaped line. You may have.

  Preferably, the heel portion of the hard region may have a lower hardness than the midfoot portion of the hard region, or vice versa.

  Preferably, the heel portion of the hard region may have a hardness lower than that of the middle foot portion and the mother-child ball portion of the hard region, or vice versa.

  In order to balance dynamically during walking or running on this defined line of hardness using a non-uniform longitudinal hardness profile of the hard region by combining with different cross-sectional hardness profiles (ie different cross-sectional hardness profiles) It will be possible to tweak different levels of skill.

  Preferably, the difference in local thickness and / or local hardness between the first shoe sole portion and the second shoe sole portion adjacent to the first shoe sole portion is the It becomes the maximum in the midfoot part extending to. As a result, a person or foot that tends to lean in the middle direction (inward (ie, towards the other foot)) leans laterally (outward (ie, away from both feet)) Prone people experience certain problems in dynamic balancing at each foot roll motion stage. In the foot roll operation stage, the middle foot part of the shoe sole is in contact with the ground while providing most support at this stage.

  Preferably, regardless of whether a transverse thickness profile (first embodiment) and / or a transverse hardness profile (second embodiment) is used to define a substantially S-shaped line, The first sole on the line and / or the second sole on either side of the generally S-shaped line may include a plurality of transverse slits or “cuts”. These slits or “cuts” are spaced along the substantially S-shaped line in the length direction of the shoe sole, and extend in the transverse direction of the shoe sole on the approximately S-shaped line. These transverse slits or cuts provide additional flex and torsional flexibility of the shoe sole during each foot roll operation.

  The features of the different variations of the first embodiment (i.e. the ridges along the S-shaped line with the defined transverse thickness profile) are the features of the different variations of the second embodiment (i.e. the definition). Can be combined independently with a hard region along a sigmoidal line using the measured transverse hardness profile.

  Preferably, the longitudinal spacing of these transverse slits is 1 mm to 10 mm, most preferably 2 mm to 6 mm.

  Preferably, the length of these slits (i.e. the first transverse dimension) extends over the entire width of the ridge and / or over the entire width of the hard region or (overall) hard core region.

  Preferably the depth of these slits (i.e. the second transverse dimension) is 1/3 to 2/3 of the total thickness of the ridge and / or the entire thickness of the hard or (overall) hard core region. 1/3 to 2/3.

  Preferably, the minimum thickness of the sole ridge is about 2 mm. The preferred thickness range of the raised portion of the shoe sole is 2 mm to 50 mm, preferably 4 mm to 30 mm.

  When defining and measuring the hardness of an elastomeric sole, the preferred elasticity / hardness scale is the Shore hardness scale.

  Preferably, the minimum hardness (ie, the hardness value of the softest region of the sole) is about 30 shore. A suitable hardness range for the sole is from 40 Shore to 80 Shore.

  In a preferred embodiment, the sole according to the invention is constituted by several different components. Each of these components is made independently using component specific materials. Preferably, the shoe sole includes an outsole portion and an insole portion.

  The outsole portion may include a heel part, a middle foot part, a mother and child ball part, and a forefoot part along the shoe sole in order from the back to the front. Together, these four parts of the sole that make contact with the ground constitute the ground contact area of the sole. This ground contact area includes a substantially S-shaped line for optimal ground contact during walking or running.

  All or some of these four parts can be integrally formed from a suitable elastomer. Preferably, all four parts are formed with one or several narrow connection parts in one piece. These connecting portions are provided between the buttocks and the middle foot, between the middle foot and the mother and child ball, and between the mother and child ball and the front foot. As a result, high flexibility between the outsole interconnects is ensured.

  Alternatively, all four of these parts may be formed as individual pieces from a suitable elastomer. As a result, in this case as well, high flexibility between the parts of the outsole is ensured and each part can be constructed from a suitable material having individual properties. Suitably, the piece which comprises a heel part is comprised from the elastomer material softer than the piece which comprises a midfoot part and a mother-and-child ball part.

  The outsole portion may include a base body configured with a suitable elastomer. The above-described buttocks, middle feet, mother and child ball, and forefoot are connected to the base body by, for example, welding, adhesion, or vulcanization. Since one or more of the four parts (for example, the collar part) may have the same hardness as the base body, they can be integrally formed from a first elastomer having a first hardness, for example, by injection molding. The other of the four parts (eg, midfoot, spherical and forefoot) is formed from a second elastomer having a second hardness (preferably higher than the first hardness of the first elastomer), for example by injection molding. After that, it can be connected to the base body, for example by welding, bonding or vulcanization.

  In addition, an optional first or lower insole portion constituted by a third elastomer having a third hardness (preferably above the hardness of the base body), the base body, and the four parts of the ground contact area, Can be provided. Preferably, the lower insole portion has a layered shape and is disposed between the base body and the ground contact portion. Most preferably, it is sufficient to include and support a substantially S-shaped line of optimal ground contact defined by the ridge region and / or a hard core region within the ground contact portion directly below the lower insole portion. This lower insole portion may be cut out of the sheet material to be length and width. Preferably, the lower insole portion is a thin layer and has a thickness of 1 mm to 5 mm, more preferably 2 mm to 4 mm. Thus, even when the lower insole material is harder than the base body material, the lower insole material can retain high flexibility due to its thin shape.

  In addition, an optional second or upper insole portion constituted by a fourth elastomer having a fourth hardness (preferably higher than the hardness of the base body) is connected to the upper side of the base body on which the foot rests Can be provided. Preferably, the upper insole portion is also a layered layer and is provided on the upper side portion of the base body. Most preferably, when this upper insole portion is cut out from the sheet material, an optimal ground contact generally S-shaped line defined by the ridge region and / or directly below and / or the lower insole portion of the base body The cutout is made to have a length and width sufficient to contain and support the hard core region in the ground contact portion directly underneath. Preferably, the upper insole portion is a thin layer and has a thickness of 1 mm to 5 mm, more preferably 2 mm to 4 mm. Therefore, the upper insole is extremely flexible due to the thin shape.

  Preferably, the upper insole portion and the lower insole portion have the same cutout outline. Thus, both the lower and upper optional insole portions can be formed by the same manufacturing equipment.

  The plurality of transverse slits or “cuts” described above are spaced along a substantially S-shaped line in the length direction of the shoe sole, and extend in the transverse direction of the shoe sole. These slits or “cuts” can be provided in any one of the ground contact portion, the lower insole portion and the upper insole portion. Preferably, the transverse slit, which increases the flexibility of the sole, is provided as an “embedded slit” only in the lower and / or upper insole portion.

  In a preferred embodiment, the sole mother and child ball part has first, second, third, fourth, and fifth middle foot parts between an inner side M and an outer side L of the sole, and the following conditions are: , Applied to the transverse thickness and / or hardness profile of the parent and child sphere.

  The thickness and / or hardness of the first metatarsal is higher than the thickness and / or hardness of the second metatarsal.

  -The thickness and / or hardness of the third metatarsal is less than the thickness and / or hardness of the fourth metatarsal.

  -The thickness and / or hardness of the fourth metatarsal is less than the thickness and / or hardness of the fifth metatarsal.

  As a result, when the foot touches the ground in the order of the buttocks, the middle foot, the mother and child ball, and the forefoot, and the foot rolls on the ground, the foot and (Ie, the weight applied to the foot moves from the initial position in the midfoot on the outside L of the shoe sole to the subsequent position in the mother and child sphere on the inside M). In other words, the foot is forcibly prolapsed while the mother and child ball portion of the foot and the shoe sole roll on the ground. In the first stage where the foot rolls on the ground, the weight acting on the outer side of the mother and child ball part after acting on the outer side of the middle foot part moves from the outer side of the mother and child ball part to the inner side of the mother and child ball part, In the second stage in which the foot rolls on the ground, the weight then acts on the inside of the forefoot part (ie on the mother's heel) after acting on the inside of the mother and child ball part.

  Preferably, the thickness and / or hardness of the second metatarsal part is smaller than the thickness and / or hardness of any of the third metatarsal part, the fourth metatarsal part and the fifth metatarsal part. As a result, the movement from the outside to the inside of the weight applied to the foot is further improved.

  Due to these conditions of the first middle foot part, the second middle foot part, the third middle foot part, the fourth middle foot part and the fifth middle foot part in the mother-child ball part of the shoe sole, during the foot roll operation The weight moves from the outside L to the inside M.

  More specifically, after the middle foot rolls the ground (behaves to balance) with the weight placed on the outside L, the weight of the mother and child starts from the outside L of the mother and child sphere. It moves to the inner side M of the sphere, eventually the front foot rolls on the ground, and the weight is placed on the inner side M. At the start of this movement in the mother-child sphere, the support of the mother-child sphere by the fifth middle foot exceeds the support by the adjacent fourth and third middle feet of the mother-child sphere. At the end of this movement in the mother-child sphere, the support of the mother-child sphere by the first middle foot exceeds the support by the second middle-foot of the mother-child sphere. In other words, the foot prolapses due to the fifth middle leg portion on the outer side L, and excessive pronation of the foot is suppressed by the first middle leg portion on the inner side M.

  Therefore, these conditions of the first middle foot part, the second middle foot part, the third middle foot part, the fourth middle foot part and the fifth middle foot part in the mother and child ball part of the shoe sole are two continuous inclinations. The same effect as that obtained when the curve is provided along a substantially S-shaped line is provided. Using these conditions, during a roll operation along the substantially S-shaped line of the right foot, the right foot first passes through the slope curve, then turns to the left at the outside L, and then turns to the right at the inside M through the slope curve. Similarly, at the time of the roll operation along the substantially S-shaped line of the left foot, the left foot first passes the inclination curve, then turns right at the outside L, and then turns left at the inside M through the inclination curve.

  In a further preferred embodiment of the shoe sole, the width measured on the S-shaped line of the thicker middle sole and / or the harder first shoe sole is locally thicker and And / or less than the width measured on the S-shaped line of the harder first shoe sole.

  As a result, when the shoe sole touches the ground by the heel during running or walking and the foot lands on the ground, a safer landing and safe heel positioning are obtained by the wider first shoe sole portion of the heel. The dynamic balancing or feedback controlled roll motion of each foot as defined in the introduction of the present description does not begin until the foot roll motion reaches a narrower midfoot.

  Preferably, the width measured across the S-shaped line of the first foot sole, which is locally thicker in the midfoot and / or harder, is locally thicker in the S-shaped line, the parent and child sphere. And / or less than the width measured across the S-shaped line of the harder first shoe sole.

  As a result, during running or walking, a dynamic balance of each foot or a roll operation that is feedback-controlled is mainly required when the middle foot is in contact with the ground.

  In a further preferred embodiment of the sole, the local thickness T and / or local hardness H of the locally thicker and / or harder first sole of the heel is from the inside M to the outside of the sole. Reduce towards L. Preferably, the heel thickness T decreases along the width W of the first shoe sole (ie, a harder and / or thicker portion for heel ground contact), while the inner M When the inclination of the ground contact surface of the first shoe sole portion of the heel portion is measured with respect to the horizontal plane ground surface on which the shoe sole is placed, the average inclination is decreased. (Grade) is 2% to 20%. The slope (grade) is defined as the ratio ΔT / W between the thickness difference ΔT and the width W of the first shoe sole. Note that this width W is the width measured along the slope line of the heel slope. In the case of a typical medium sized shoe sole with a width W of about 50 mm, this corresponds to a thickness difference of 1 mm to 10 mm. Preferably, the inclined ground contact surface of the heel is a planar surface or a surface that is at least 80% planar. As a result, a wedge-shaped gap is formed between the remaining heel portion of the shoe sole and the horizontal plane ground surface.

  As a result, when the shoe sole touches the ground while running or walking and the foot touches the ground, the local thickness T and / or the local hardness H of the first shoe sole portion of the buttock is reduced. And / or the foot is forced off slightly. That is, the weight applied to the foot moves from the initial neutral or substantially central position at the time of landing to the outer side L of the shoe sole. Thus, the weight is guided to the midfoot portion on the outside L of the shoe sole. In the case of the flat ground contact surface having the preferred inclination described above, the wedge-shaped gap between the heel and the planar ground surface is closed while the heel is guided.

  Thus, these conditions of the heel of the shoe sole are substantially straight, with one road side being higher than the other road side, and has an effect similar to an inclined road surface. Using these conditions, after the foot landing at the start of the roll motion along the substantially S-shaped line, the foot is slightly inclined toward the outer side L and is smoothly guided to the narrow midfoot. . The narrow midfoot portion extends along the outer side L of the shoe sole in the vicinity of the outer side L of the shoe sole.

  In a further preferred embodiment, a shoe sole comprising a heel, a midfoot, a mother-child ball or midfoot and a forefoot or toe in the bottom side of the sole base body in order from back to front as described above Has a special transverse thickness and / or hardness profile at the parent and child sphere. The region of the sole that is associated with the second metatarsal bone (M2) or provided directly below the second metatarsal bone (M2) in the mother-child ball portion or the middle foot portion is the first metatarsal, the third Any of the metatarsals, fourth metatarsals and fifth metatarsals, or any of the first metatarsals, third metatarsals, fourth metatarsals and fifth metatarsals The thickness and / or hardness is lower than that of the sole region immediately below. In addition, the same conditions can be applied to at least a portion of the forefoot or toe portion of the sole adjacent to the mother-to-child ball portion (ie, associated with the second toe (T2) or the second toe (T2) The sole region immediately below is associated with any of the first toe, the third toe, the fourth toe and the fifth toe, or the sole directly below the first toe, the third toe, the fourth toe and the fifth toe. Less thickness and / or hardness than area). Preferably this applies to the part of the forefoot or toe part adjacent to the mother and child sphere. This depression (“cantilever”) in the M2 part of the mother-child sphere and / or the T2 part of the soft region and optionally the adjacent forefoot provides a constant pressure relief for the second metatarsal.

  That is, the amount of local support (i.e., the local support force acting from below on the shoe sole of the shoe sole according to the invention) is determined by the overall thickness and / or hardness profile of the shoe sole. Please note that. At least the base body and the ground contact portion connected to the base body contribute to the amount of local support obtained due to its local hardness and local geometry (eg, local thickness distribution and possible slit distribution). In addition, a lower insole portion and / or an upper insole portion can be provided, which can further contribute to the resulting local support. The ground contact part of the shoe sole (the heel part, the middle foot part, the mother and child ball part and the front foot part) and the optional insole part (the lower insole part and / or the upper insole part) all follow a substantially S-shaped line. Contribute to the ridges and / or the hard core region that extends.

  A further understanding of the present invention and further features of the present invention will become apparent to those skilled in the art when taken in conjunction with the accompanying drawings which illustrate preferred embodiments of soles according to the present invention.

It is a side view which shows the inner side of embodiment of the shoe sole which concerns on this invention. It is a side view which shows the outer side of embodiment of the shoe sole which concerns on this invention. It is a bottom view which shows the ground contact area | region of embodiment of the shoe sole which concerns on this invention. It is a top view which shows the foot contact area | region of embodiment of the shoe sole which concerns on this invention. It is a perspective bottom view of the 1st component (base part main part) of the embodiment of the shoe sole concerning the present invention. It is a bottom view of the 2nd component (ground contact part) of the embodiment of the shoe sole concerning the present invention. It is a top view of the 1st component (base part main part) of the embodiment of the sole according to the present invention. It is a top view of the 3rd or 4th component (lower side or upper side insole) of the embodiment of the sole according to the present invention. Fig. 5 shows a first preferred cross section along the plane M-L of Fig. 3 or 4 when viewed from the direction a) of Fig. 3 or 4 of an embodiment of a shoe sole according to the present invention. Fig. 5 shows a second preferred cross section along the plane ML of Fig. 3 or Fig. 4 when viewed from the direction a) of Fig. 3 or Fig. 4 of an embodiment of a shoe sole according to the present invention. Fig. 5 shows a third preferred cross-section of the shoe sole embodiment according to the present invention along the plane ML in Fig. 3 or 4 when viewed from the direction a) of Fig. 3 or 4; Fig. 5 shows a first preferred thickness profile or hardness profile along the plane ML of Fig. 3 or Fig. 4 for an embodiment of a sole according to the present invention. Fig. 5 shows a second preferred thickness profile or hardness profile along the plane ML of Fig. 3 or Fig. 4 for an embodiment of a sole according to the present invention. Fig. 5 shows a third preferred thickness profile or hardness profile along the plane ML of Fig. 3 or Fig. 4 for an embodiment of a sole according to the present invention. Fig. 5 shows a fourth preferred thickness profile or hardness profile along the plane ML of Fig. 3 or Fig. 4 for an embodiment of a sole according to the present invention. Fig. 6 shows a fifth preferred thickness profile or hardness profile along the plane ML of Fig. 3 or Fig. 4 for an embodiment of a sole according to the present invention. FIG. 6 shows a sixth preferred thickness or hardness profile along the plane ML of FIG. 3 or FIG. 4 for an embodiment of a shoe sole according to the present invention. FIG. 6 shows a seventh preferred thickness profile or hardness profile along the plane ML of FIG. 3 or FIG. 4 for an embodiment of a shoe sole according to the present invention. FIG. 6 shows an eighth preferred thickness profile or hardness profile along plane ML of FIG. 3 or FIG. 4 for an embodiment of a shoe sole according to the present invention. FIG. 9 shows a ninth preferred thickness profile or hardness profile along plane ML of FIG. 3 or FIG. 4 for an embodiment of a shoe sole according to the present invention.

  1 and 2, the inner side (side portion of the foot arch) and the outer side of the sole 1 for the right foot according to the present invention are shown together with the right foot final portion 2. The shoe sole 1 includes, in order from the back to the front, a heel part 3, a middle foot part 4, a mother-child ball part 5, and a forefoot part 6 on the bottom side of the shoe base part 7. This is shown more clearly in FIG. 5 (perspective bottom view) and FIG. 7 (top view). Further, an inclined region 7c and an upper edge 7e of the base body 7 are illustrated. The inclined region 7c of the base body 7 is relatively wide (as best shown in FIG. 3) defined by the lower surface of the heel part 3, the middle foot part 4, the mother and child ball part 5 and the front foot part 6 of the shoe sole 1. A much wider foot contact area (as best seen in FIG. 4) defined by the narrow ground contact area and the foot contact surface of the upper side 7f and the upper insole 8 of the upper foot contact platform of the sole 1 A transition region is formed between The forefoot portion 6 includes a front joint portion 66. The front joint portion 66 extends upward to partially cover the front portion of the base body 7 and join several toe portions 61, 62, 63, 64, 65 (FIGS. 3 and 6).

  In FIG. 3, a bottom view of the ground contact area of the shoe sole 1 according to the present invention is shown. The ground contact area defined by the lower surface of the heel part 3, the middle foot part 4, the mother and child ball part 5 and the forefoot part 6 of the shoe sole 1 includes a substantially S-shaped line G for optimal ground contact during walking or running. . This line G starts from the heel part 3, extends along the middle foot part 4 and the mother-child ball part 5, and ends at the forefoot part 6. Typically, the line G has one bending point PI at any location of the mother-child sphere portion 5. More specifically, the front foot portion 6 of the sole 1 includes a toe portion 61, a second toe portion 62, a third toe portion 63, a fourth toe portion 64, and a fifth toe portion 65. All or some of the portions 3, 4, 5, 61, 62, 63, 64, 65 of the ground contact area are connected to the base body 7 and at least partially surrounded by the lower edge 7b of the base body 7 Or “framed”. In both the inside and outside of the ground contact area, the slope area 7c extends from the lower edge 7b to the much wider foot contact area of the upper foot contact platform of the sole 1. On the inner side M, the inclined area 7c extends from the lower edge 7b to the lower side 7d of the upper foot contact plateau. On the outer side L, the inclined area 7c extends from the lower edge 7b to the step area 7d ′. On the outside L, the slope 7c is steeper than on the inside M. The arch area of the shoe sole includes this step area 7d 'and the rest of the lower side part 7d of the upper foot contact plateau. In the step region 7d ′, the shoe sole 1 is thicker than the rest of the lower side portion 7d of the inner side M and the outer side L. This extra thickness of the step region 7d 'increases the stability of the base body 7 of the shoe sole 1.

  In FIG. 4, a top view of a foot contact area of an embodiment of a shoe sole 1 according to the present invention is shown. The foot contact area is defined by the foot contact surface of the upper side portion 7f and the upper insole 8 of the upper foot contact platform portion of the shoe sole 1, and also in this case, an approximately S-shape for optimal ground contact during walking or running. A line G is included. The shape of the upper insole 8 extends from both the inner side M and the outer side L (of the line G starting from the heel part 3), and typically has a single bending point PI (at any position of the mother-child sphere part 5). In addition, the shape extends to the forefoot part 6 all the time. The foot contact area defined by the upper side 7f and the upper insole 8 is surrounded or "framed" by the upper edge 7e. The upper insole 8 is disposed in a complementary recess in the upper foot contact surface.

  That is, the preferred embodiment of the shoe sole 1 shown in FIGS. 1, 2, 3, and 4 is disposed on the first base body 7 (FIGS. 5 and 7) and the bottom side of the base body 7. A second ground contact area, which is defined by the lower surface of the heel part 3, the middle foot part 4, the mother and child ball part 5 and the front foot part 6 (FIG. 6); , And an upper insole 8 (FIG. 8) disposed in a recess in the foot contact area. In addition, the lower insole (not shown) preferably has the same shape as the upper insole 8 and can be inserted between the base body 7 and the ground contact area.

  In FIG. 5, a perspective bottom view of the base body 7 of the sole 1 according to the present invention is shown. Some parts of the base body 7 have already been shown and described in FIGS. 1, 2 and 3 and are better shown in FIG. The configuration of the bottom side portion of the base body 7 is complementary to the outer shape of the ground contact area defined by the heel part 3, the middle foot part 4, the mother and child ball part 5, and the forefoot part 6 shown in FIG. 6. More particularly, the base body 7 has a lower concave surface 7a surrounded or “framed” by a lower edge 7b. The main portion 7 a of the lower concave surface has the same outer shape as the recess in the upper foot contact surface that receives the lower insole having the same outer shape as the upper insole 8. The lower insole (not shown) and the upper insole 8 are best illustrated in FIGS. 4 and 8 and may have the same shape (ie the same profile and the same thickness), preferably the base body 7. The same material having a higher hardness than the other material. The smaller concave portions 7 a 1, 7 a 2, 7 a 3, 7 a 4, 7 a 5 of the lower concave surface of the base body 7 correspond to the front feet 6 of the shoe sole 1 and are separated by the lower edge 7 b of the base body 7. The outer shapes of these smaller portions 7a1, 7a2, 7a3, 7a4, 7a5 are complementary to the outer shapes of the toe portions 61, 62, 63, 64, 65, respectively. Therefore, the heel part 3, the middle foot part 4, and the mother-child ball part 5 can be received in the main part 7a of the lower concave surface, and the toe parts 61, 62, 63, 64, 65 of the front foot part 6 are the lower concave surface. Of smaller parts 7a1, 7a2, 7a3, 7a4, 7a5. On the outer side L, the inclined region 7c extending from the lower edge 7b to the lower side 7d of the upper foot contact plateau is also from the smaller portion 7a5 of the lower concave surface 7a to the heel part 3 in the length direction. Extend. On the inner side L, an inclined region 7c extending from the lower edge portion 7b to the step region 7d ′ also extends from the mother and child ball portion 5 to the flange portion 3 in the length direction. In the outer side L, the inclination 7c is steeper than the inner side L where the foot arch is arranged.

  In FIG. 6, a bottom view of the ground contact portions 3, 4, 5, 6 of the shoe sole 1 according to the present invention is shown. In the transverse direction toward the outer side L, the heel part 3, the middle foot part 4, the mother and child ball part 5 and the forefoot part 6 are all up to the outer outline of the lateral (L) sole 1 (that is, the lateral (L) base. It extends almost all the way (to the outer outline of the body 7). In the transverse direction toward the inner side M, the rear part of the heel part 3, the front part of the mother-and-child ball part 5 and the entire front foot part 6 reach the middle (M) outer outline of the sole 1 (that is, the middle (M) The middle part and the front part of the heel part 3, the entire middle foot part 4 and the rear part of the mother-child ball part 5 are outside the sole 1 in the middle (M). It extends to the outline (that is, to the outer outline of the intermediate (M) base body 7). In the forefoot portion 6, the toe portion 61, the second toe portion 62, the third toe portion 63, the fourth toe portion 64, and the fifth toe portion 65 are mutually connected by slits corresponding to the pattern of the lower edge portion 7b. To be separated. In the front portion of the forefoot portion 6, the individual toe portions 61, 62, 63, 64, 65 are joined by a joining portion 66. During assembly (for example by gluing or welding), the ground contact portions 3, 4, 5, 6 are inserted into the lower concave surface 7a. More specifically, the ground contact portions 3, 4, and 5 are inserted into the main portion 7a of the lower concave surface, and the toe portions 61, 62, 63, 64, and 65 that make contact with the ground are smaller portions of the lower concave surface. 7a1, 7a2, 7a3, 7a4 and 7a5 are inserted respectively.

  In FIG. 7, a top view of the base body 7 of the sole 1 according to the present invention is shown. The upper side portion 7 f has an upper concave surface 7 g that receives the upper insole 8. Further, the entire upper side portion 7 f and the upper edge portion 7 e around the joint portion 66 of the front foot portion 6 extend upward at the front end of the base body 7 that partially covers the base body 7 portion.

  In FIG. 8, a top view of the lower or upper insole 8 of the shoe sole 1 according to the present invention is shown. The lower and upper insoles have the same outline, but may consist of different materials and / or may have different thicknesses. Preferably, the lower insole 8 and / or the upper insole (not shown) has a thickness profile in the transverse direction (ie, the direction extending perpendicular to the generally ground-shaped line of optimum ground contact). Have. In addition, the lower insole 8 and / or the upper insole (not shown) have slits that extend in a transverse direction or in a direction perpendicular to the generally S-shaped line of optimum ground contact.

  That is, the overall transverse thickness profile and / or hardness profile of the sole 1 according to the present invention (that is, the thickness profile and / or hardness in a cross section extending in a direction perpendicular or perpendicular to the substantially S-shaped line G). Profile) can be determined by the transverse thickness profile and / or hardness profile of the base body 7, can be determined by the transverse thickness profile and / or hardness profile of the ground contact portions 3, 4, 5, 6 respectively, It can be determined by the transverse thickness profile and / or hardness profile of the upper insole 8 and can optionally be determined by the transverse thickness profile and / or hardness profile of the lower insole (not shown).

  Similarly, the overall longitudinal thickness profile and / or hardness profile of the shoe 1 according to the present invention (that is, the thickness profile and / or hardness in a cross section extending in a direction parallel or tangential to the substantially S-shaped line G). Profile) can be determined by the vertical thickness profile and / or hardness profile of the base body 7, and can be determined by the vertical thickness profile and / or hardness profile of the ground contact portions 3, 4, 5, 6 respectively, the upper insole 8 vertical thickness profiles and / or hardness profiles, and can optionally be determined by the vertical thickness profile and / or hardness profile of the lower insole (not shown).

  In addition, the overall flexibility (and in particular the torsional flexibility of the sole 1) around the longitudinal axis according to the present invention (ie around the axis parallel or tangential to the generally S-shaped line G). Flexibility) can be determined by slits spaced in the length direction, extending in a direction transverse to the generally S-shaped line. These slits may be provided in the base body 7, may be provided in any one or all of the ground contact portions 3, 4, 5, 6, or may be provided in the upper insole 8. Also, it may optionally be provided on the lower insole (not shown).

  In FIG. 9A, FIG. 9B and FIG. 9C, a preferred midfoot section along the plane ML of FIG. 3 or FIG. 4 when viewed in the direction a) of FIG. 3 or FIG. As shown, points PM and PL along plane ML indicate corresponding positions in FIGS. 3, 4 and 9A. For the sake of brevity, the structural differences in cross section that are visible due to suitable composite materials or multilayer structures (base body 7, ground contact portions 3, 4, 5, 6, upper insole 8, lower insole) are These cross sections are not shown.

  The cross-sectional thickness (constant hardness) cross-sectional thickness T profile shown in FIG. 9A is a cross-sectional thickness T profile and has a relatively narrow ground contact plateau region 11. The plateau region 11 includes a substantially S-shaped line G for optimal ground contact, and the first inclined region 12 whose thickness decreases toward the inner side M, and the thickness decreases toward the outer side L. And a second inclined region 13. This is an example of the visible bulging portions 11, 12, and 13 extending at least along the vertical portion of the substantially S-shaped line G.

  The cross-sectional thickness T profile of the cross-section shown in FIG. 9B is a cross-thickness T profile and has a relatively wide and relatively thick ground contact plateau region 11 ′. The ground contact plateau region 11 ′ includes a substantially S-shaped line G for optimum ground contact, and similarly, a first inclined region 12 ′ whose thickness decreases toward the inner side M and toward the outer side L. And a second inclined region 13 'whose thickness is reduced. In addition to the transverse thickness profile of the first material, the cross section has a transverse thickness profile of the second material having a hardness that is lower than the hardness of the first material. This is an example of an invisible hard core region 11 ′, 12 ′, 13 ′ that extends at least along the vertical portion of the substantially S-shaped line G.

  The transverse hardness H profile (ie, the curve of hardness H (of constant thickness)) in the transverse section shown in FIG. 9C is a transverse hardness H profile and has a relatively narrow hard core region 11 ″. 11 ″ includes a substantially S-shaped line G for optimal ground contact, a first slope region 12 ″ in which the hardness decreases toward the inner side M in the hardness curve, and the hardness decreases toward the outer side L in the hardness curve. And a second hardness gradient region 13 ″. This is another example of the invisible hard core regions 11 ″, 12 ″, 13 ″ extending along at least the vertical portion of the substantially S-shaped line G.

  10A, 10B, 10C, 10D, 10E, 10F and 10G, the preferred transverse thickness profile (protrusion) along the plane ML of FIG. 3 or 4 of the sole 1 according to the invention. Part) and / or hardness profile (hard core region), again the points PM and PL along the plane M-L indicate corresponding positions in FIGS. 3, 4 and 9A. . Again, for the sake of simplicity, any structural differences in the cross-sections that are visible in these cross-sections due to the preferred composite material or multilayer structure (base body 7, ground contact portions 3, 4, 5, 6 The upper insole 8 and the lower insole are not shown in these cross sections.

  In FIG. 10A, a trapezoidal profile is illustrated.

  In FIG. 10B, a rectangular profile is illustrated.

  In FIG. 10C, a curved convex profile is illustrated.

  In FIG. 10D, a modified trapezoid profile (“cantilever trapezoid profile”) using a curved concave bottom line is illustrated.

  In FIG. 10E, a modified rectangular profile (“cantilever rectangular profile”) using a curved concave bottom line is illustrated.

  In FIG. 10F, a profile is shown using a straight bottom line that is laterally inclined (thickness and / or hardness decreases towards the outside).

  In FIG. 10G, a profile with a straight bottom line inclined in the middle (reducing thickness and / or hardness towards the inside) is illustrated.

  In FIG. 10H, a profile using a curvilinear profile inclined in the lateral direction (thickness and / or hardness decreases toward both sides and thickness and / or hardness decreases toward the outside) is illustrated. Is done.

  In FIG. 10I, a profile using a curved convex profile inclined in the middle direction (thickness and / or hardness decreases toward both sides and thickness and / or hardness decreases toward the inside) is obtained. Illustrated.

  Preferably, these profiles are used in the midfoot 4. However, some of these profiles may be used in insole portions other than the middle foot portion 4 (for example, those in the buttocks 3 or the mother-child ball portion 5). Specifically, the profile shown in FIG. 10F can be used in the heel part 3.

  The cantilever profile (for example, the one shown in FIG. 10D or FIG. 10E) can be provided on the mother-child ball part 5 and the forefoot part 6 of the shoe sole 1. The region of the sole 1 associated with the second metatarsal (M2) is less thick and / or less rigid than the region of the sole associated with the other metatarsal. In addition, at least the forefoot part 6 or the toe part of the sole adjacent to the mother-to-child ball part 5 (ie, the region of the sole 1 associated with the second toe (T2)) is associated with the other toe. The thickness is smaller than the area of the sole and / or the hardness is smaller. This is preferably applied to the toe portion 62 of the forefoot 6. This design reduces the pressure on the second metatarsal (M2) and also provides a constant release to the joint between the second metatarsal (M2) and the second toe (T2) during walking. It is done.

  In addition, the following conditions are that the first metatarsal part M1, the second metatarsal part M2, the third metatarsal part M3, and the fourth metatarsal bone are provided between the inner side M and the outer side L of the shoe sole 1. It can be applied to the transverse thickness and / or hardness profile of the mother-to-child ball part 5 having the part M4 and the fifth metatarsal part M5.

  a) The thickness and / or hardness of M2 is lower than the thickness and / or hardness of any of M1, M2, M3, and M4, and preferably M1, M3, M4, and M5 are all the same thickness. And / or having hardness.

("M2 <M1, M3, M4, M5 and preferably M1 = M3 = M4 = M5")
b) The thickness and / or hardness of M1 is greater than the thickness and / or hardness of M2, and the thickness and / or hardness of all M3, M4 and M5 is between the thickness and / or hardness of M1, M2. Fits in.

("M2 <M3, M4, M5 <M1")
c) The thickness and / or hardness of M1 is greater than the thickness and / or hardness of M2, and the thickness and / or hardness of all of M3, M4, and M5 is higher than the thickness and / or hardness of M1. .

("M2 <M1 <M3, M4, M5")
d) The thickness and / or hardness of M1 is greater than the thickness and / or hardness of M2, the thickness and / or hardness of M3 is greater than the thickness and / or hardness of M4, and the thickness of M4 And / or the hardness is higher than the thickness of M5 and / or the hardness of M5.

("M2 <M1 and M3>M4>M5")
e) The thickness and / or hardness of M1 is greater than the thickness and / or hardness of M2, the thickness and / or hardness of M3 is lower than the thickness and / or hardness of M4, and the thickness of M4 And / or the hardness is lower than the thickness and / or hardness of M5, and preferably the thickness and / or hardness of M2 is lower than the thickness and / or hardness of any of M3, M4, and M5. Condition e) is the most preferred condition.

("M2 <M1 and M3 <M4 and M4 <M5" and preferably M2 <M3, M4, M5))
Preferably, the thickness and / or hardness of M1 is higher than the thickness and / or hardness of M5.

  These are the first metatarsal part M1, the second metatarsal part M2, the third metatarsal part M3, the fourth metatarsal part M4 and the fifth metatarsal part M5 in the mother-child ball part 5 of the shoe sole 1 Due to this condition, the weight during the foot roll operation moves from the outside L to the inside M.

  More specifically, after the buttocks 3 come into contact with the ground with the weight placed on the outside L and the middle foot 4 rolls on the ground (behavior for dynamic balance), Roll on the ground, and as a result, the weight moves from the outer side L of the mother and child ball part 5 to the inner side M of the mother and child ball part 5, and finally the forefoot part 6 rolls on the ground and the weight is placed on the inner side M. Is done. At the start of this moving action in the mother-child ball part 5, the fifth metatarsal part M5 of the mother-child ball part 5 is more than the adjacent fourth metatarsal part M4 and third metatarsal part M3 of the mother-child ball part 5. Even provide high support. At the end of this moving action in the mother-child ball part 5, the first metatarsal part M1 of the mother-child ball part 5 provides higher support than the second metatarsal part M2 of the mother-child ball part 5. Accordingly, the foot is prolapsed due to the fifth metatarsal bone portion M5 on the outer side L, and the excessive metastasis is suppressed by the first metatarsal bone portion M1 on the inner side M.

  In addition, the first toe part T1 (= 61), the second toe part T2 (= 62), the third toe part T3 (= 63), the fourth toe part T4 (= 64) and the fifth toe part T5 (= Similar conditions can be applied to the transverse thickness and / or hardness profile of the forefoot 6 having 65) between the inside M and the outside L of the sole 1.

  a) The thickness and / or hardness of T1 is greater than the thickness and / or hardness of any of T2, T3, T4, and T5. Preferably, T2, T3, T4, and T5 are all the same thickness. And / or hardness.

("T1> T2, T3, T4, T5 and preferably T2 = T3 = T4 = T5")
b) The thickness and / or hardness of T1 is greater than the thickness and / or hardness of T2, and the thickness and / or hardness of T2 is greater than the thickness and / or hardness of T3 and the thickness of T3 And / or the hardness is greater than the thickness and / or hardness of T4, and the thickness and / or hardness of T4 is greater than the thickness and / or hardness of T5.

("T1>T2>T3>T4>T5")
c) The thickness and / or hardness of T1 is lower than the thickness and / or hardness of any of T2, T3, T4, and T5. Preferably, T2, T3, T4, and T5 are all the same thickness. And / or hardness.

("T1 <T2, T3, T4, T5 and preferably T2 = T3 = T4 = T5")
d) The thickness and / or hardness of T1 is lower than the thickness and / or hardness of T2, the thickness and / or hardness of T2 is lower than the thickness and / or hardness of T3, and the thickness of T3 And / or the hardness is lower than the thickness and / or hardness of T4, and the thickness and / or hardness of T4 is lower than the thickness and / or hardness of T5.

("T1 <T2 <T3 <T4 <T5")
e) The thickness and / or hardness of T1 is greater than the thickness and / or hardness of T2, T2 has the same thickness and / or hardness as T3, and the thickness and / or hardness of T3 is Less than the thickness and / or hardness of T4, the thickness and / or hardness of T4 is less than or equal to the thickness and / or hardness of T5.

(“T1> T2 and T2 = T3 and T3 <T4 and T4 ≦ T5”)
In the above transverse profile, the transition between the thickness and / or hardness portions M1, M2, M3, M4, M5 and T1, T2, T3, T4, T5, respectively, may be gradual or smooth. Transition may be used.

  In addition, the following conditions can be applied to the transverse thickness and / or hardness profile of the heel 3.

  f) The maximum width W4 and average of all the widths W4 of the locally thicker and / or harder sole portion of the midfoot 4 is locally thicker and / or harder shoes of the heel 3 It is lower than the average of the maximum width W3 of the bottom portion and all the widths W3.

("W4 <W3")
g) The local thickness T and / or local hardness H of the locally thicker and / or harder sole portion of the heel 3 is determined from the inner side M to the sole 1 as shown in FIG. 10F, for example. It decreases toward the outside L. The average inclination amount of the ground contact surface of the buttocks is 2% to 20% with respect to the horizontal direction. The inclination of the ground contact surface of the first shoe sole portion of the heel part 3 (corresponding to the reference numerals 11, 11 ′, 11 ″ in FIGS. 9A, 9B and 9C, respectively) is an average of 2% to 20% or The inclination is defined as a ratio ΔT / W between the thickness difference ΔT and the slope line width W of the first shoe sole portion of the heel part 3. The width W is defined as the heel part 3; Note that W is the width measured along the slope line of W. Therefore, W may be the same as the maximum width W3, but is likely to be different from W3.

  h) The maximum width W4 and average of all widths W4 of the locally thicker and / or harder sole portion of the midfoot 4 is locally thicker and / or harder of the mother-child ball 5 Lower than the average of the maximum width W5 and all the widths W5 of the sole portion.

("W4 <W5")
It should be noted that the maximum widths W3, W4 and W5 were measured in a direction perpendicular to the S-shaped line G in the heel part 3, the middle foot part 4 and the mother and child ball part 5, respectively.

  The average of the widths W3, W4, and W5 is the average of all (typically different) widths along the S-shaped line G in the heel part 3, the middle foot part 4, and the mother and child ball part 5, respectively. Please note that.

  Preferably at least the conditions f) and g) are combined in the sole 1 according to the invention. As a result, after the landing of the buttocks 3 on the ground, the legs are unscrewed, and a smooth transition from the buttocks 3 to the midfoot 4 is also obtained.

  Most preferably, conditions e) and h) for the mother and child ball part 5, conditions f) for the heel and middle foot parts 3 and 4, and condition g) for the heel part 3 are combined.

  By combining these conditions, each foot experiences the following three stages when rolling on the ground.

  1) After landing on the ground in the first stage or the forced turning stage, the foot is forcibly turned off by the buttocks 3. In other words, the shoe sole 1 takes control and forcibly leads to the outside L.

  2) In the second stage or dynamic balancing stage, the foot must be dynamically balanced at the ridged midfoot 4. In other words, the sole 1 does not take control and does not provide forcible guidance. That is, the pedestrian or runner must rely on, for example, pressure transmitted from the insole 8 to the sole of the foot and feedback from any slight tilt at the ankle joint.

  3) In the third stage or forced pronation stage, the foot is forcibly prolapsed by the mother and child ball part 5. In other words, the sole 1 regains control and forces it to the inside M.

  In the entire foot roll motion on the ground, the pedestrian or runner feels an approximately S-shaped line of optimal ground contact during walking or running. In other words, due to the effect of the insole 8, proper reception is improved in walking or running. The overall inherent acceptance based on the pressure by the insole 8 at or near the foot contact surface of the sole 1 and the pressure by the T and / or H profile of the S-shaped line at the ground contact surface of the sole 1 is It becomes strongest at the stage where dynamic balance is achieved at the foot 4 (feedback to a pedestrian or runner is obtained).

Claims (21)

A sole (1) suitable for shoe products,
Including a heel part (3), a middle foot part (4), a mother-child ball part (5), and a forefoot part (6) along the shoe sole in order from the back to the front on the ground contact surface
Each of the buttocks, middle feet, and mother and child ball portions is adjacent to an arch area on the lower side of the arch of the foot (2) when the shoe sole (1) is worn,
The shoe sole includes a first shoe sole portion (11; 11 ′; 11 ″) extending along a substantially S-shaped line (G) and a first shoe section (G) extending along both sides (G) of the substantially S-shaped line. 2 soles (12, 13; 12 ', 13'; 12 ", 13"),
The substantially S-shaped line (G) starts from the buttocks (3), extends to the forefoot (6) through the middle foot and the mother and child ball (4, 5),
The local thickness T and / or local hardness H of the first shoe sole (11; 11 ′; 11 ″) is determined by the second shoe sole (12, 13; 12 ′, adjacent to the first shoe sole). 13 ′; 12 ″, 13 ″) greater than the local thickness T and / or the local hardness H,
The shoe sole (1) includes an insole (8) that is fixed to the foot contact surface or embedded directly below the foot contact surface of the shoe sole (1), and the insole (8) A sole having a shorter width than the bottom (1) and extending along the substantially S-shaped line (G).   The sole according to claim 1, characterized in that the insole (8) is made of a material that is harder than the sole material around the insole (8).   The local thickness of the first shoe sole (11) is larger than the local thickness of the second shoe sole (12, 13) adjacent to the first shoe sole, and the first shoe sole (11) and the first shoe sole (11) The sole according to claim 1 or 2, characterized in that the two soles (12, 13) may have the same hardness.   The sole according to claim 3, wherein the entire sole is made of one kind of material having one hardness value.   The shoe sole includes a raised portion (11, 12, 13), and the raised portion (11, 12, 13) protrudes from a lower surface facing the ground and extends along at least the substantially S-shaped line. The shoe sole according to any one of claims 1 to 4, wherein:   The raised portion has a trapezoidal cross section (trapezoidal thickness profile) in a plane orthogonal to the substantially S-shaped line, and a first trapezoidal base line defines a platform-like region of the shoe sole surface, and a second trapezoid The base line defines a transition region between the raised portion and the bulk of the shoe sole, and the second trapezoidal base line is longer than the first trapezoidal base line. Shoe soles.   The raised portion has a rectangular cross section (rectangular thickness profile) in a plane perpendicular to the substantially S-shaped line, and a first rectangular base line defines a plateau-like region on the shoe sole surface, and a second rectangular shape The base line defines a transition region between the raised portion and the bulk (remaining) of the shoe sole, and the second rectangular base line has the same length as the first rectangular base line. The shoe sole according to 6.   The raised portion has a curved convex section (curved convex thickness profile) in a plane orthogonal to the substantially S-shaped line, and a bead-shaped or lens-shaped region of the shoe sole surface is curved. 6. A shoe sole according to claim 5, characterized in that a defined and base line defines a transition region between the bend and bulge and the bulk of the sole.   The local hardness of the first shoe sole (11 ′; 11 ″) is higher than the local hardness of the second shoe sole (12 ′, 13 ′; 12 ″, 13 ″) adjacent to the first shoe sole. The first shoe sole (11 '; 11 ") and the second shoe sole (12', 13 '; 12", 13 ") have the same thickness. Shoe soles.   The sole according to claim 9, wherein the entire sole has substantially the same thickness.   The shoe sole includes a hard region (11 ″), and the hard region (11 ″) has a hardness higher than that of the soft region (12 ″, 13 ″) around the shoe sole, and is at least substantially in the S shape. 11. A shoe sole according to any one of claims 1, 2, 9 or 10, characterized in that it extends along a portion of the line.   The hard region has a trapezoidal hardness profile in a plane orthogonal to the substantially S-shaped line, the trapezoidal hardness profile defining a maximum hardness core region, and a hardness decreasing transition region on both sides of the maximum hardness core region The shoe sole according to claim 11, wherein the hardness gradually decreases from the maximum hardness core region toward the hardness lowering transition region.   The hard region has a rectangular hardness profile in a plane orthogonal to the substantially S-shaped line, the rectangular hardness profile defines a maximum hardness core region, and the hardness of the lower hardness on both sides of the maximum hardness core region The shoe sole according to claim 12, wherein the sole includes a region having a soft region.   The hard region has a curved and convex hardness profile in a plane perpendicular to the substantially S-shaped line, the curved and convex hardness profile demarcating a maximum hardness portion, and on both sides of the maximum hardness portion. 12. The shoe sole according to claim 11, wherein a hardness lowering transition region is defined, and the hardness gradually decreases from the maximum hardness portion to the soft region having a lower hardness.   The difference in local thickness and / or local hardness between the first shoe sole portion and the second shoe sole portion adjacent to the first shoe sole portion is the heel portion (3) and the mother-child ball portion (5). The shoe sole according to any one of claims 1 to 14, wherein the shoe sole is maximized at the middle foot (4) extending between the shoe and the foot.   The first shoe sole (11; 11 ′; 11 ″) on the substantially S-shaped line (G) and / or the second shoe sole (12, 2) on both sides of the substantially S-shaped line (G). 13; 12 ′, 13 ′; 12 ″, 13 ″) includes a plurality of slits, and the plurality of slits are formed on the substantially S-shaped line (G) in the length direction of the shoe sole (1). The shoe sole according to any one of claims 1 to 15, wherein the shoe sole is arranged at intervals along the same and extends in a transverse direction of the shoe sole across the substantially S-shaped line (G). . The mother-child ball part (5) includes a first metatarsal part (M1), a second metatarsal part (M2), a third metatarsal part (M3), a fourth metatarsal part (M4), and a first metatarsal part (M4). 5 metatarsals (M5) between the inside M and the outside L of the sole (1),
The thickness and / or hardness of the first metatarsal bone (M1) is greater than the thickness and / or hardness of the second metatarsal bone (M2);
The thickness and / or hardness of the third metatarsal bone (M3) is smaller than the thickness and / or hardness of the fourth metatarsal bone (M4);
The thickness and / or hardness of the fourth metatarsal bone (M4) is smaller than the thickness and / or hardness of the fifth metatarsal bone (M5). The shoe sole according to any one of the above.   The thickness and / or hardness of the second metatarsal bone part (M2) is greater than the thickness and / or hardness of any of the third, fourth and fifth metatarsal bone parts (M3, M4, M5). The shoe sole according to claim 17, wherein the shoe sole is small.   The width measured across the S-shaped line of the locally thick and / or hard first shoe sole (11; 11 ′; 11 ″) in the midfoot (4) is the heel (3 19), which is smaller than the width measured on the S-shaped line of the locally thick and / or hard first shoe sole (11; 11 '; 11 "). The shoe sole according to item 1.   The width measured on the S-shaped line of the locally thick and / or hard first shoe sole portion (11; 11 ′; 11 ″) of the midfoot (4) is the mother-child sphere (5). 21. A width as measured on the S-shaped line of the locally thick and / or hard first sole part (11; 11 '; 11 ") The shoe sole according to item 1.   The local thickness T and / or the local hardness H of the locally thick and / or hard first shoe sole portion (11; 11 ′; 11 ″) of the heel (3) is determined by the shoe sole ( The shoe sole according to any one of claims 1 to 20, wherein the sole decreases from the inner side M to the outer side L of 1).

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