ES2342145B1 - SOLE FOR FOOTWEAR. - Google Patents

Abstract

Sole for footwear, which consists of three parts (1, 2 and 3), of which the first forms a part bottom (1.1) or sole itself, and a top (1.2); while part (2) is a padded padding and part (3) is a rigid and flexible crossbow, embedded in the heel area padded padding (2); because the bottom (1.1) configures, on both sides of the heel area, two tapered tufts (1.3), in which an oblong central opening (1.4) is determined, to through which an elongated portion (1.2.1) of the part is seen superior (1.2).

Description

Sole for footwear.

Technical sector

The object of the present invention is a sole for footwear, of the type of soles that present in the heel area an understandable structure that helps with a singular configuration of the contact profile between the sole and the ground.

State of the art

Within the state of the art they are already known multiple backgrounds that show soles with a heel understandable, as is the case with the United States patent No. 324,653 and 3.88 6,674. Through the also patent of United States number 4,638,575, a shoe is disclosed that in the heel area incorporated two arched metal straps, by way of of crossbows, with rolling bearings at their ends, to make said compressible character of the heel effective.

Also through the United States patent No. 4,262,433, a sole having a heel is disclosed compressible and that, in addition, has a front area noticeably arched, between which and the heel itself, there is another area also arched, on which you can balance the entire sole giving rise to this central area to a "ball support", which set a balance in the way of walking; so that, in First, the understandable heel is supported, and then support the central area of "ball support" giving rise to a swinging around it, until you contact the beginning of the front of the sole and, because of its sensitive bow, it continue the contact along it until it reaches the tip.

In the search for this same concept of walking to balancing mode there is the solution contained in the Spanish patent 2228564.

Object of the invention

The object of the present invention is a sole which also has a compressible heel, but which, compared to known solutions, provides the improvement that compressibility of the heel is achieved by a constructive solution that does not complicates the realization of the sole and also does not increase the weight Of the same.

In addition, the sole object of the present invention it has a lower profile defined by a curved part in the heel area, a flattened intermediate zone and a front zone curved that reaches the toe; so that without reaching have the "ball support" of US 4,262,433, if establishes, together with the compressible character of the heel, a walking of the user defined by a first support of the back area of the heel, with the compression of it, followed by the rest of the heel, until you reach the flattened central area and continue progressive in supporting the entire arched front of the sole, until you reach the toe of it. This profile design bottom of the sole is an evolution of a sole from the year 1996 that the holder of this invention put on the market under the denomination "new limit"

To achieve all this, the sole object of the The present invention is constituted by three characteristic parts, which are:

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The general body of the sole.

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A padded interior padding of under weight.

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A crossbow of material synthetic.

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The first part or general body of the sole is constituted in two materials that are injected at the same time in the same mold, so that the upper part of this general body is formed, for example, but without limitation, in a pellet of expandable thermoplastic rubber that seeks the greatest possible lightness of this general body of the sole; while the lower part is also determined, as a non-limiting example of practical realization, by a pellet of thermoplastic rubber but now compact, so that it offers greater flexibility than the part
higher.

The second part, consisting of the filling interior as a mattress, is shaped by molding in a low weight material, such as polyether foam; from so that it offers the lowest possible weight, thus taking weight off sole set. This padded inner padding is molded regardless of the general body of the sole and once shaped is inserted into a housing that the general body determines all along it and that opens towards the part upper, so that the padded padding is inserted into this accommodation and is retained in it by a combination of forms Between both pieces.

In the molding of this padded padding integrates within it the third piece, formed by the crossbow that it is constituted in a rigid material, but capable of flexing; from so that this crossbow is embedded inside the filling padded, in the heel area.

When the user steps on the heel, he is crossbow flexes elastically and when the user lifts the heel with respect to the ground, the spring's own elastic recovery it helps you in that action, giving the heel a character compressible.

With this same mission, the general body it presents a unique structure in the heel; from so that the most flexible bottom part determines, on both sides of said general body, broad tufts of tapered contour, which in their central part have oblong openings, for which You see the material from the top.

The compressible heel structure absorbs the shock of the initial contact of the sole body with the surface of the ground, when walking or running, decreasing the boat and minimizing the impact, which reduces pressure on the tarsus and, especially, on the heel bone, along with a decrease in the tension of the ligaments, in the tarsal joint.

Initial heel support understandable allows reduce tension in the longitudinal arch of the foot and its inside.

When the user is standing, the compressible heel reduces tension in the feet, legs and back, due to Stiffness reduction.

Thanks to the compressible character of the sole of the heel, there is a more uniform wear thereof, avoiding the uneven wear of the back and heel sides, which allows to keep a walking centered, maintaining a adequate sole tread for longer.

The heel compression capability prevents the foot slides forward due to the initial impact of the heel when stepping on

Each time a tread occurs, the heel and crossbow compression embedded in the padding sole padding, allows energy storage; so that the heel decompression, aided by the action of the crossbow, transmits a push or expansion, after each compression, which It facilitates the user the initial movement of the step.

On the other hand, the padded sole padding, In addition to exercising a mattress effect for the foot, it provides a lower fatigue for the user Indeed, by the constitution of said padded padding in a foamed material, the weight is reduced by set of the sole and, consequently, that of footwear, which translates into a lower weight to be borne by the user when walking and it entails less fatigue for said user.

Walking with this sole, the contact pressure It is set first with the back area of the compressible heel, then, progressively, with the rest of the heel, to then move on to the central flattened transition zone, from which you continue on the front arched area and, finally, only on the part front arch.

The raised surface of the front of the sole helps in the jump movement towards the step next.

All this translates into less pressure. exerted on the metatarsal arch and, as a result, is exercised plus the big toe, improving circulation in the feet and in the legs.

This way of walking, together with the action of cushioned heel, helps to walk more focused, reducing the tension of the feet and getting a better function of your anatomy. In addition, this walk more focused, favors the correct positioning of the spine.

Description of the figures

Figure 1 is a perspective view that shows the three parts (1, 2 and 3) that constitute the sole, represented according to an exploded view during assembly, with part (3), which is a flexible crossbow, embedded within the part (2) which is a padded padding.

Figure 2 corresponds to a sectional view longitudinal of the sole object of the present invention.

Figure 3 shows a sectional view cross section of the sole object of the invention given at the height of the heel, right in the part of the oblong openings (1.4) of the tucked in (1.3).

Figure 4 is a perspective view that schematically shows the configuration of the crossbow (3).

Figure 5 is an elevation view of the sole, the corresponding cut of a shoe

Detailed description of the invention

The object of the present invention is a sole for footwear, which, as shown in figure 1, is constituted by three pieces identified with the numerical references (1, 2 and 3).

The piece (1) in turn has two parts clearly differentiated and identified in said figure 1 with the references (1.1) and (1.2), of which the first of them occupies the bottom, fulfilling the sole functions properly said and is intended to come into contact with the ground; While that part (1.2) occupies a superior position.

Both parts (1.1) and (1.2) constitute a thermoplastic material, such as in a pellet of thermoplastic rubber of the so-called "TR", without the use of this material can be considered in a limiting sense but, only, as a possible example of practical realization.

The bottom (1.1) is made of material compact thermoplastic; while the upper part (1.2) is of expandable thermoplastic material; so that one, offers the necessary abrasion resistance characteristics in your contact with the ground and, at the same time, high conditions of flexibility.

The conformation of the piece (1) is carried out by injection, injecting both materials at the same time thermoplastics that make up the parts (1.1) and (1.2) respectively.

As can be seen in figures 3 and 5, the lower part (1.1) determines, in relation to the two sides of the heel area, two broad tufts of tapered contour, identified with the numerical reference (1.3).

In the central part of each tapered tuck (1.3), there is an oblong opening (1.4), through which you see the material of the upper part (1.2); so that the part upper thus defines both elongated portions, identified with the numerical reference (1.2.1) that are seen from the outside, to through oblong openings (1.4).

The part identified with the numerical reference (2) is a padded interior padding that provides the characteristic of be soft and at the same time, have little weight, so that the whole of the sole present the lowest possible weight.

According to a non-limiting example of realization practical, this padded inner padding (2) is shaped into a polyether foam, being able to conform to any other material soft thermoplastic that offers the aforementioned characteristics of form a padded padding with a minimum weight.

The padded inner padding (2) integrates into your interior to the third piece constituting the sole and identified with the numerical reference (3); so that this piece (3) is embedded inside the padded inner padding (2), as appreciate in figures 2 and 3, in the heel area.

This third piece, identified with the numerical reference (3), is constituted in a rigid material capable of flexing, in order to fulfill some crossbow functions. According to a non-limiting example of practical realization, this crossbow (3) is constituted by injection of a plastic material rigid and preferably of the so-called amorphous thermoplastics, such as Acrylonitrile Butadiene Styrene "ABS" that offers thus adequate characteristics of hardness and stiffness, but at the time also of flexibility.

The crossbow (3), as seen in the Figure 4, presents, equidistant from its lateral edges, some ribs (3.2) that give it the necessary stiffness, without diminishing its bending capacity

On the other hand and between said ribs (3.2) they place a series of through openings (3.1), through which the material constituting the padded padding (2), so that the crossbow (3) form a single whole with said padded padding (2).

In figure 1 it can be seen as the part superior (1.2) forms a housing designated with the numerical reference (1.2.2), where the padded padding (2). At the mouth of this accommodation (1.2.2), a lip is determined, as a lip, identified with the reference (1.2.3), so that this flange (1.2.3) helps retain the padded padding (2) inside the housing (1.2.2).

As shown in Figure 5, the sole so constituted it presents a flattened central part identified by the letter "C"; a front part, identified by the letter "D", which extends with a pronounced bow from the flattened central part "C" to the tip of the shoe, and a backside in relation to the heel area and identified by the reference "T1" that extends, also according to a bowing, from the central flattened part "C" to, practically, the end of the heel, where a small one is defined chamfered section "T2".

With the sole so constituted, it provides a compressible heel; so that when the user loads a weight the two processes occur on the heel area at the same time following:

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A flexion of the crossbow 3.

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A flexion of the bottom 1.1 in the heel area. This flex is helped by the approach between the upper and lower edge of the tapered remit 1.3 which, like lips, approach each other.

When the user tends to lift the heel to take a step, the elastic recovery of the crossbow (3) and of the lower part (1.1), in the part of the tapered referral (1.3), will help the user to lift the foot from the ground, to give the next step.

In this way, when a person walks with a footwear provided with the sole object of the present invention, is first produces the contact against the ground of the part heel back, giving rise to the compression of this rear area of the heel, followed by a tilting of the sole, all along of the parts "T1" and "T2", to reach the central part flattened "C" and, from here, start a tilt in relationship with the front arched part "D"; so that the step from the first contact of the back of the heel to the contact with the central flattened part "C" followed by contact with the front arched part "D" is helped by the elastic heel recovery, thanks to its constitution compressible.

Claims (6)

1. Sole for footwear, characterized in that it consists of three parts (1, 2 and 3), of which the first forms a lower part (1.1) or sole itself, and an upper part (1.2); while part (2) is a padded padding and part (3) is a rigid and flexible crossbow, embedded in the heel area of the padded padding (2); because the lower part (1.1) configures, on both sides of the heel area, two tapered tufts (1.3), in which an oblong central opening (1.4) is determined, through which an elongated portion is seen ( 1.2.1) from the top (1.2). 2. Sole for footwear, in all according to the preceding claim, characterized in that the upper part (1.2) forms a housing (1.2.2) in correspondence with the padded padding (2), for the fit of the latter within that ; and because the housing (1.2.2) determines in its entire mouth a flange (1.2.3) as a retaining lip of the padded padding (2). 3. Sole for footwear, in all according to the first claim, characterized in that the lower part (1.1) and the upper part (1.2) are formed in a material, such as thermoplastic rubber, but the material of the lower part (1.1 ) Compact and more flexible than the one at the top (1.2) which is expandable, although both are injected at the same time. 4. Sole for footwear, in all according to the first claim, characterized in that the padded padding (2) is of a foamed plastic material, such as polyester foam, to thus offer the foot a soft support and, at the same time, minimize the weight of the sole. 5. Sole for footwear, in all according to the first claim, characterized in that the crossbow (3) is preferably constituted in a rigid plastic material capable of flexing, such as "ABS", presenting, equidistant from its lateral edges, stiffening ribs (3.2) and, among them, through openings (3.1), for the passage of the material constituting the padded padding (2). 6. Sole for footwear, in all according to the first claim, characterized in that the lower part (1.1) defines a support profile on the ground determined by a flattened central part "C" that continues to the front and practically, until the end of the heel, in arched parts "D" and "T1" respectively, finishing off in the part of the heel with a small chamfered section "T2".