KR20220170562A - Shoe outsole having a function of dispersing dynamic load - Google Patents

Abstract

The present invention relates to an outsole disposed at the external side of a midsole, which constitutes the bottom material of a shoe along with the midsole and an insole. The shoe outsole of the present invention comprises a bottom portion coming in direct contact with the ground and an outsole main body adhering to the bottom portion to function as a cushion, wherein buffering members made of a sponge material having higher stretchability than the outsole main body are inserted into the portions of the outsole main body, which correspond to an arch of the sole and a front side of the sole to protrude from a top surface of the outsole main body. According to the present invention, the hardness of the arch buffering member and the front sole buffering member inserted to protrude from the top surface of the outsole main body is lower than the material of the outsole main body, so that shrinkage deformation occurs initially in the buffering members and then in the outsole main body when a load is applied to the sole of a shoe wearer. Accordingly, in particular, when a dynamic load is applied suddenly in walking or running, the load can be effectively distributed.

Description

Outsole for shoes with dynamic load distribution {SHOE OUTSOLE HAVING A FUNCTION OF DISPERSING DYNAMIC LOAD}

The present invention relates to an outsole located outside the midsole together with a midsole and an insole constituting the bottom material of a shoe, and consists of a bottom part in direct contact with the ground and an outsole main body that is adhered to the bottom part to play a cushioning function. , A shock absorbing member made of a material with higher elasticity than that of the outsole body is inserted into the arch portion of the outsole body area and the portion corresponding to the sole of the front foot so as to protrude from the upper surface of the outsole body so that the concentrated load applied during walking or running is applied to the entire sole of the foot. It relates to an outsole for shoes having a dynamic load distributing function that allows support to be evenly distributed over the entire surface.

For humans walking upright, the soles of the feet contact the floor while holding the weight of the body while standing with their feet on the floor or while walking or running, so the risk of fatigue accumulation or injury is higher than other body parts. does not exist.

As a result, shoes are worn to protect the feet, including the soles of the feet. Typically, the shoes consist of an upper covering the instep and a bottom part connected to the lower periphery of the upper to wrap the sole.

In general, the sole of a shoe is not made of a single layer, but consists of a triple layer structure of an insole in contact with the sole of the wearer, an outsole located outside and in direct contact with the ground, and a midsole located between the insole and the outsole.

While the three layers of the sole of the shoe are made of different materials, they have the same flat shape as the shape of the sole of the wearer's sole, and form a laminate that is integrally bonded up and down.

The outermost outsole at the bottom of the triple layer is made of a watertight, hard and durable material as it directly contacts the ground in various physical situations, and the midsole is made of a cushion material with high elasticity, so that the load applied to the sole In general, the insole plays a role in promoting wearing in a comfortable state as a part in direct contact with the sole of the wearer's foot.

On the other hand, in recent years, in forming the sole of a shoe based on ergonomics, it goes beyond simple load reduction through the cushioning function of the midsole to properly distribute the load in response to the distribution of the load applied to the sole. A midsole having a load distributing function is known.

In addition, as a recent trend, the outsole, not the midsole, is formed of a cushion material to induce shock mitigation or load distribution. Two of the prior patents are as follows.

First, Patent Registration No. 10-0757996 discloses a functional shoe sole that supports and cushions the entire area of the sole by the outsole of the shoe so that load or shock is dispersed. A circular arc-shaped protrusion is formed, and a heel seating part is formed on the heel so that the heel is supported in a softly wrapped state. It is revealed that through the structure of forming a horizontal groove of increasingly wide width and an inclined contact portion at the bottom corner of the heel to form a wider grip with the ground, the contact area of the outsole is expanded and the outsole is softly bent during walking.

Next, Patent Registration No. 10-0851537 discloses a foot arch support in the form of a hollow tube so as to be positioned from the inner end of the connection part to the central part in a shoe sole in the shape of a sole consisting of a first half and a second half and a connecting part connecting the first half and the second half. is inserted, and a cushion insertion groove is formed at the end of the second half to insert an air cushion, and a functional shoe sole is disclosed. It is expected to stimulate and correct foot development, promote blood circulation, and naturally maintain foot rolling motion due to the natural slope of the bottom surface of the sole of the shoe.

It cannot be said that the shoe sole structure of the prior inventions has no utility in that it is configured to compensate or correct the deviation of the load acting due to the three-dimensional shape of the sole to some extent. It is necessary to improve or supplement the function of distributing the load to the surrounding area when the increased load acts on a specific area of the sole in a dynamic state such as walking or running in a shoe equipped with a shoe sole. It is pointed out that there is

The present invention was devised with the disadvantages and problems pointed out in relation to the conventional shoe outsole in mind, and the outsole is bonded to the bottom part in direct contact with the ground and the bottom part to serve as a cushioning function. In addition, a shock absorbing member made of a material with higher elasticity than that of the outsole body is inserted into the arch portion of the outsole body and the portion corresponding to the front sole of the outsole body so as to protrude upward so that most of the sole area is supported by the outsole and the dynamic load is distributed. The purpose of the invention is to provide an outsole.

Another object of the present invention is to form a plurality of incision lines having a length shorter than the length of the corresponding width along the width direction of the outsole for shoes to partially divide the area of the outsole body, so that each divided area corresponds to the load acting on the divided area. It is to provide an outsole in which the compression deformation of is induced to be performed first, and as a result, the dynamic load is distributed.

The above object of the present invention is an outsole for shoes consisting of an outsole body having a sole shape and decreasing in thickness from the heel toward the front and a bottom portion adhered to the bottom surface of the outsole body and contacting the ground, wherein the outsole body corresponds to the arch of the foot This is achieved by an outsole for shoes in which a buffer member with higher elasticity than the outsole body is protruded upward to the corresponding part of the sole and the forefoot to distribute the dynamic load.

The outsole body is made of a flexible or cushioning material such as EVA foam, and the bottom portion adhered to the bottom of the outsole body is made of a material that is hard and highly durable, and is preferably formed with a relatively thin thickness compared to the outsole body.

In addition, the periphery of the upper surface of the outsole body is formed as an edge pin portion extending upward and serves to ensure that the midsole and insole stacked on the upper surface of the outsole body are smoothly bonded through the edge pin portion.

An approximately rectangular through hole is formed in the arch portion of the outsole body and the front sole portion of the outsole body, and the arch buffer member and the forefoot sole buffer member are respectively inserted into these through holes. The arch buffer member and the forefoot buffer member are made of, for example, EVA sponge and are configured to exhibit relatively high elasticity compared to the outsole body.

When the hardness of the material of the outsole body is in the range of 50 degrees to 60 degrees, the hardness of the buffer member is about 40 degrees to 50 degrees, which is preferably about 10 degrees lower. Therefore, when the same load is applied to the outsole body and the buffer member, relatively more compression (or contraction) of the buffer member occurs.

Since the buffer members are thicker than the thickness of the outsole body into which they are inserted, the upper surfaces of the buffer members protrude from the upper surfaces of the surrounding outsole bodies when the buffer members are inserted into the outsole body. At this time, the height difference between the arch buffer member and the upper surface of the outsole body around it is preferably 2.8 - 4.2 mm, and the height difference between the forefoot buffer member and the upper surface of the outsole body around it is preferably 2.8 - 3.2 mm.

At this time, the opposite (front) side of the arch buffer member has a greater height difference from the upper surface of the outsole body around it compared to the heel side. For example, the heel side of the arch buffer member shows a height difference of 3 mm from the upper surface of the outsole body, while the opposite side shows a height difference of 4 mm. due to the progressively decreasing

Even in the case of the forefoot buffer member, there is a tendency that the difference in height from the upper surface of the outsole body increases toward the front, but the difference is much smaller than that of the arch buffer member.

On the other hand, the buffer members are approximately rectangular plate shape having its own height, and in the case of the arch buffer member, the width is preferably slightly expanded toward the front compared to the heel side, and in the case of the forefoot buffer member, on the contrary, the width increases toward the front A narrower form is preferred.

Next, a plurality of cut lines having a length less than the length of the corresponding width are formed along the width direction of the outsole body to partially divide the outsole body area. At this time, the incision line is formed with a length formed in a straight line with the end point located inside about 1-2 cm from both edges of the outsole body, and its depth spans the entire thickness from the upper surface to the lower surface of the outsole body. .

A plurality of the incision lines are formed parallel to each other at intervals in a direction perpendicular to the longitudinal direction of the outsole body. For example, two are formed in the heel area of the outsole body, one is formed between the arch buffer member and the forefoot sole buffer member, and two are formed in the forefoot sole buffer member formation area.

On the other hand, the incision line extends its starting point (or end) at right angles and cuts it so that the bent end faces the longitudinal direction of the outsole body, so that the incision line extends in the longitudinal direction in the deformation process by the repeated action of the load. As a result, it is prevented from leading to complete division of the outsole body.

The outsole body exists as a plurality of subdivided areas rather than a single area by a plurality of incisions formed therein, and accordingly, when a local load is applied to the outsole body, the subdivided area to which the local load is applied It accommodates the load applied in the process of preferential and relatively large deformation in and distributes it to other adjacent subdivided areas.

In the present invention, since the hardness of the arch buffer member and the forefoot buffer member inserted in a state protruding from the upper surface of the outsole body is lower than that of the outsole body, these buffer members preferentially shrink when a load is applied to the sole of the shoe wearer. As the deformation of the outsole body occurs after the deformation occurs, especially when a sudden dynamic load is applied in a walking or running state, the load is effectively distributed.

And, in the present invention, since the arch buffer member protruding from the upper surface of the outsole body supports the arch of the foot of the shoe wearer, a significant portion of the load applied through the wearer's heel is accommodated by the deformation of the arch buffer member, so that walking or There is an advantage in preventing or alleviating pain in the heel area or damage to the plantar fascia accompanying the repetitive load applied to the heel during driving.

In addition, when a local load is applied to the outsole body of the present invention, the local load is preferentially deformed in the small divided area formed by the incision line, and the applied load is accommodated and other adjacent small divided areas The load is distributed in the process of being transmitted to the body, so the comfortable feeling of wearing is maintained.

Figure 1 is an exploded perspective view of an embodiment of the outsole of the present invention.
Figure 2 is a perspective view of an embodiment of the outsole of the present invention.
Figure 3 is a cross-sectional view along line AA of Figure 2;
4 shows a state in which the insole is coupled to the outsole according to the present invention,
(a) is a cross-sectional view in the width direction,
(B) is a longitudinal sectional view.

The above object of the present invention and matters related to the overall structure of the outsole for shoes and the coupling relationship between each component are clear through the following description with reference to the drawings showing the outsole for shoes according to a preferred embodiment of the present invention. will be understood

First, FIG. 1 is an exploded perspective view of an outsole according to an embodiment of the present invention, FIG. 2 is a perspective view of an outsole according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view taken along line A-A of FIG.

As shown, the outsole 10 according to the present invention is composed of an outsole body 20 and a bottom portion 30 that is attached to the bottom surface of the outsole body 20 and directly contacts the ground.

The outsole main body 20 is molded of, for example, EVA foam and has cushioning properties, and the hardness as an indicator of cushioning properties is preferably 50 to 60 degrees, more preferably 55 degrees. In addition, the bottom portion 30 integrally adhered to the bottom surface of the outsole body 20 and in contact with the ground is made of a material that is thinner and more durable than the outsole body 20, and a protrusion for non-slip is formed on the bottom surface it is desirable to be

The outsole body 20 made of the elastic material is gradually thinner from the heel to the front (toe). For example, if the thickness of the outsole body at the heel is about 2 cm, the thickness of the front end is half The thickness is gradually reduced to 1 cm. In other words, the upper surface of the outsole body 30 forms a gentle downward slope from the heel to the front.

On the other hand, a substantially rectangular arch through hole 21 and a forefoot through hole 22 are formed in the area corresponding to the arch of the foot and the area corresponding to the front sole of the outsole body 20, and each of these through holes 21 and 22 The arch buffering member 41 and the forefoot buffering member 42 are inserted. The arch buffer member 41 and the forefoot buffer member 42 are made of EVA sponge and are configured to exhibit relatively high elasticity compared to the outsole body.

That is, if the hardness of the material of the outsole body 20 is 50 to 60 degrees, the hardness of the buffer members 41 and 42 is about 40 to 50 degrees, so that when the same load is applied by keeping it about 10 degrees low Compared to the outsole main body 20, more compressive deformation is preferentially induced in the areas of the buffer members 41 and 32.

Since the arch buffer member 41 and the forefoot buffer member 42 are thicker than the thickness of the outsole body 20 into which they are inserted, in a state where these buffer members 41 and 42 are inserted into the outsole body 20 The upper surfaces of the buffer members are in a protruding state compared to the surrounding outsole body. At this time, the height difference between the arch buffer member 41 and the upper surface of the outsole body 20 around it is appropriately in the range of 2.8 to 4.2 mm, and the forefoot buffer member 42 and the upper surface of the outsole body 20 around it. A height difference of 2.8 - 3.2 mm is appropriate. The height difference range between the upper surface of the buffer member and the upper surface of the outsole body is a range in which the original load distribution function is smooth while the shoe wearer does not feel a foreign body or a sense of rejection even when the protruding buffer member contacts the sole of the foot, and this numerical limit range is the result obtained by testing many times while varying the height difference in various ways.

At this time, the opposite (front) side of the arch buffer member 41 shows a larger height difference from the upper surface of the surrounding outsole body 20 than the heel side. For example, the heel side of the buffer member shows a height difference of 3 mm from the upper surface of the outsole body, whereas the opposite side shows a height difference of 4 mm. This is due to the fact that the height of the upper surface of the lower slopes gently downward toward the front.

Even in the case of the forefoot buffer member 42, there is a tendency that the difference in height from the upper surface of the outsole body 20 increases toward the front, but the difference is much smaller than that of the arch buffer member 41.

On the other hand, the buffer members 41 and 42 are approximately rectangular plate shape having their own height, and in the case of the arch buffer member 41, the width is slightly expanded toward the front compared to the heel side, and the forefoot buffer member 42 ), on the contrary, the width becomes narrower toward the front, which is a natural result of the change in width (more precisely, the shape of the sole) along the longitudinal direction of the outsole body 20.

Next, along the width direction of the outsole body 20, a plurality of incision lines 23 having a length less than the length of the corresponding width are formed to partially divide the outsole body area. At this time, the incision line 23 is formed with a length formed in a straight line with the end point located inside about 1 - 2 cm from both edges of the outsole body, and the depth is the entire thickness from the upper surface to the bottom surface of the outsole body. will get caught

A plurality of the incision lines 23 are formed parallel to each other in a direction perpendicular to the longitudinal direction of the outsole body 20 .

On the other hand, the incision line 23 extends its starting point (or end) at right angles and cuts it to form a bent end part 23a so that the extended end faces the longitudinal direction of the outsole body, thereby repetitive load action and deformation process. The incision line 23 extends in its longitudinal direction and consequently is configured to prevent the splitting of the outsole body 20 .

Next, Figure 4 shows a state in which the midsole is coupled to the outsole according to the present invention, (a) is a cross-sectional view in the width direction, and (b) is a cross-sectional view in the longitudinal direction. As shown, the midsole 50 is the outsole body ( 20) on the upper surface of the outsole body 20 including the arch buffer member 41 and the forefoot buffer member 42 in a state where the upper surface edge portion and the edge pin portion 24 of the outsole body 20 and the adhesive surface are formed. become overlaid.

On the other hand, as described above, since there is a height difference between the upper surface of the shock absorbing members 41 and 42 and the upper surface of the outsole body 20, there is a mutual difference between the lower surface of the midsole 50 and the upper surface of the outsole body 20. The space portion V is formed by floating without adhesion.

In the shoes to which the insole for shoes of the present invention having the above structure is applied, the mechanism for distributing the load and protecting the sole is as follows.

When wearing shoes to which the outsole of the present invention is applied and standing still, the arch buffer member 41 protruding from the upper surface of the outsole body 20 elastically contacts the wearer's arch and induces contraction deformation. As a result, partial dispersion of the load concentrated on the heel is achieved, and even in the forefoot portion, a certain degree of load dispersion is achieved in the same area through the process of preferential contact and deformation of the forefoot cushioning member 42.

Next, when a dynamic load of walking or running for a long time is applied while wearing shoes to which the outsole of the present invention is applied, a significantly increased load compared to the stopping period is concentrated on the heel or forefoot area and is transmitted to the outsole.

In this case, the local load acting on the heel area is formed to protrude in front of it, and the support of the load is made toward the arch buffer member 41, which shrinks and deforms preferentially and with a greater amount of deformation, that is, as a result, the load dispersion will occur.

In addition, when walking or running, in which the sole of the forefoot first touches the ground, the load is intensively transferred to the outsole area of the sole of the foot. In the process of deformation, the load is distributed.

In addition, the outsole body 20 exists as a plurality of subdivided areas rather than a single area by the plurality of incisions 23 formed therein, and thus the outsole body 20 has a local load acting. In this case, in the process of preferential and relatively large deformation in the small divided area to which such local load is applied, the applied load is accommodated and distributed to other adjacent small divided areas.

10. Outsole
21. Arch through
22. Through the sole of the foot
23. Incision
23a. bent end
30. Bottom
41. Arch buffer member
42. Forefoot buffer member
50. Midsole

Claims (4)

In the outsole for shoes consisting of an outsole body having a sole shape and decreasing in thickness from the heel toward the front, and a bottom portion adhered to a bottom surface of the outsole body to contact the ground;
A shoe having a dynamic load distribution function, characterized in that an arch buffer member and a forefoot buffer member having higher elasticity than the outsole body are inserted into the arch portion of the outsole body and the portion of the forefoot portion of the outsole body so as to protrude from the upper surface of the outsole body. for outsole. The outsole for shoes having a dynamic load distribution function according to claim 1, wherein the hardness of the outsole body material is 50 to 60 degrees, and the hardness of the arch buffer member and the forefoot buffer member is 40 to 50 degrees. . The method of claim 1, wherein the height difference between the arch buffer member and the upper surface of the outsole body around it is 2.8 - 4.2mm, and the height difference between the forefoot buffer member and the upper surface of the outsole body around it is 2.8 - 3.2mm. Outsole for shoes with a characteristic load distribution function The outsole for shoes having a load distributing function according to claim 1, wherein a plurality of incisions having a length smaller than the length of the corresponding width are formed along the width direction of the outsole body.

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