ES1304230U - Ventilated shoe insole (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Ventilated insole for footwear, made up of a multi-layer structure, in which a lower layer (1) of flexible material in the shape of a cup is defined, to which an upper layer (2) is fixed on the perimeter and above, equipped of an air inlet hole (3) in correspondence with the middle area of the heel, and air outlet holes (4) in correspondence with the anterior area of the insole, characterized in that the lower (1) and upper layers (2) define an internal chamber whose thickness is progressively increasing in a posterior direction, and within which a spongy pad (5) is arranged made of a porous material with a high air retention capacity, with the particularity that in correspondence with the metatarsal support area of the foot, the chamber includes a transverse band (7), which occupies the entire width of the bottom of the chamber from side to side, made of a flexible material that insulates the passage of air, with a height less than the height that the chamber presents in said area in an inoperative situation, and that in a situation of pressure on said area is susceptible to dividing the chamber into two parts, preventing the passage of air from the posterior area to the previous one, causing the entry of air towards the heel area of the insole, while in a situation of pressing the foot on the heel area said transverse band (7) defines an upper passage within the chamber for the flow of air from the heel area to the heel area. anterior and its exit through the air outlet holes (4), providing in the heel area and embedded in the spongy pad (5) a flexible and waterproof sheet (8), capable of blocking the hole (3), the lower layer (1) presenting a thickening (10) in the toe area, which occupies the entire interior volume of the insole in that area, the lower layer (1) also presenting a thickening in its posterior portion, which It mainly affects its lateral vertical sections. (Machine-translation by Google Translate, not legally binding)

Description

DESCRIPTION

Ventilated shoe insole

TECHNIQUE SECTOR

The present invention refers to a ventilated insole for footwear, whose obvious purpose is to improve comfort in the use of footwear by generating an air flow inside the footwear, in this case a recirculated flow, as well as by the participation of a partially waterproof inflatable chamber as a shock-absorbing element.

The object of the invention is to provide an insole that allows any existing footwear to be converted into self-ventilated footwear, all with a simple and consequently economical structure.

BACKGROUND OF THE INVENTION

There are certain types of footwear that are self-ventilated and are based on the existence of a floor in which an air chamber with air inlet and outlet valves participates, a chamber through which the air is projected towards the user's foot. when it loads its foot on the sole of the shoe, sucking air in the opposite direction when the foot is raised through a one-way valve that communicates said chamber with the outside.

The problem with this type of self-ventilated footwear is that it is a specific footwear, so although comfort is a factor that consumers take into account, the aesthetic aspect usually takes priority over these features, so adapting this solution to shoes with very different configurations is a practically unviable task.

Trying to avoid this problem, the applicant himself is the owner of utility model U202030608, which defines a ventilated insole for footwear that, although it allows converting any footwear into self-ventilated footwear, presents a structure in which at least one non-return valve participates, which complicates and makes the product more expensive.

EXPLANATION OF THE INVENTION

The ventilated insole for footwear that is recommended completely satisfactorily solves the previously mentioned problem, by materializing in an insole, adaptable to any footwear, improving its performance, without having to design a specific insole for each type of footwear, all with a very simple and consequently economical structure, in which the use of non-return valves is not necessary.

To this end, and more specifically, the template of the invention is constituted from a multilayer structure, in which a lower or base layer and an upper layer are defined that define an internal chamber through which a air flow inside the shoe, as will be seen later.

The lower layer is made of flexible material and shaped like a bowl, presenting a thickening of the same material in the toe area and with the perimeter wall progressively higher until reaching the highest area at the back.

The thickening of the toe area allows different sizes of insoles to be cut with a single mold, significantly reducing manufacturing costs.

This chamber formed by the two upper and lower layers allows a sufficient volume of air to be housed inside the insole, entering through at least one hole located in the heel area, and which will be pushed out with the step when walking. through front holes also provided in the upper sheet that closes the bowl.

The chamber is filled with a spongy pad made of a porous (open-pore) material, with a high air retention capacity (for example polyurethane foam or technological materials for 3D printing), a characteristic that is increased by also presenting a series of perforations that occupy approximately the entire rear half of the insole (middle area and heel), with the exception of a small area coinciding with the air inlet hole that the upper sheet has in the heel area.

According to one of the essential characteristics of the invention, in the area in which the transverse arch or metatarsal area of the foot will rest, the insole has a transverse band, which occupies the entire width of the bottom of the chamber from side to side, dividing it into 2 parts, and whose function is to act as a barrier or dam that prevents the flow of air through the spongy padding towards the toe when you step on it.

More specifically, when walking, the transverse arch or metatarsal area of the foot will press on the transverse band at the same time that the heel will have risen, a situation in which air will tend to enter through the rear hole, filling the pad. of air, housing the largest amount in the perforated area, and being retained inside the spongy pad thanks to the front transverse band of the insole.

In the next phase of the movement, the heel will be the one that rests by pressing on the rear area of the insole, blocking the rear air inlet hole and causing the displacement of the air contained in the pad towards the front area to exit through the holes located in that area, air movement that will now not be impeded by the front transverse band since the foot will not be pressing on the spongy pad, and that in an inoperative situation will present a height lower than the height of the chamber that defines the insole in said area.

The movement of this volume of air contained in the pad is favored by the elasticity of the insole, which contributes to the pressure of the footprint acting very sharply on the spongy pad, emptying it of air through the front holes.

The spongy pad has a flexible, air-impermeable sheet in the heel area, located under the rear air intake hole of the upper layer.

This flexible sheet inserted in the posterior area of the spongy pad is not arranged in the middle of the spongy pad, but rather is displaced upwards, with the part of the pad located below being thicker than the part that remains. from above.

According to another of the characteristics of the invention, the spongy pad is cut in a bevel, being thinner in the front or toe part to increase its thickness towards the heel area.

Finally, it should be said that the spongy pad does not completely fill the chamber defined by the lower and upper layers, but rather a hollow perimeter area is defined that surrounds the pad, which due to the configuration of the insole will be larger in the posterior area of said insole.

In this way, a template that is easy to manufacture is achieved, which allows a forced circular air flow to be ensured, all without the need for non-return valves or other mechanisms that complicate and increase the cost of manufacturing the template.

DESCRIPTION OF THE DRAWINGS

To complement the description that will be made below and in order to help a better understanding of the characteristics of the invention, in accordance with a preferred example of its practical implementation, a set of plans is attached as an integral part of said description. where, for illustrative and non-limiting purposes, the following has been represented:

Figure 1.- Shows a top plan view of a ventilated insole for footwear made in accordance with the object of the present invention.

Figure 2.- Shows a plan view of the insole stripped of its top layer, as well as its spongy pad core.

Figure 3.- Shows a profile and longitudinal section view of the template of the invention.

Figure 4.- Finally shows a cross-sectional view of the template of the invention at the level of the heel area.

PREFERRED EMBODIMENT OF THE INVENTION

In view of the figures outlined, it can be seen how the ventilated insole for footwear of the invention is made up of a multi-layer structure, in which a lower layer (1) of flexible material in the shape of a cup is defined, to which An upper layer (2) is fixed on the perimeter and on top, provided with an air inlet hole (3) in correspondence with the middle area of the heel, and air outlet holes (4) in correspondence with the anterior area of the heel. template.

The lower layer (1) has a front thickening (10) located in the toe area and which occupies the entire interior volume of the insole in that area.

These two layers define an internal chamber whose thickness progressively increases posteriorly, that is, towards the heel, a chamber within which a spongy pad (5) is arranged, made of a porous material (open pore), with a high retention capacity. of air (for example polyurethane foam or technological materials for 3D printing).

This spongy pad (5) is likely to include a series of perforations (6) that occupy approximately the entire rear half, affecting the area of the shank and heel, with the exception of a small area coinciding with the air inlet hole ( 3).

As can be seen in Figures 2 and 3, in the support area of the transverse arch or metatarsal area of the foot, the insole has a transverse band (7), which occupies the entire width of the bottom of the chamber from side to side. dividing it into 2 parts, although it has a height slightly less than the height that defines the chamber formed by the lower and upper layers (1-2).

This transverse band (7) will be made of a flexible but insulating material for the passage of air, so that its function is to act as a barrier or dam that prevents the flow of air through through the spongy pad (5) towards the toe when stepped on.

Thus, and given that when walking the pressure of the foot on the different areas of the insole varies, this allows the insole to "swell" through the posterior inlet hole when the pressure is concentrated on the anterior mid-area. air (3), preventing the passage of air towards said anterior area, while when the heel is supported, the barrier defined by the transverse band (7) is partially released, as it has a height lower than the height of the chamber itself that defines the insole in said area, displacing the air contained in the heel area towards the front area of the insole so that it finally escapes through the air outlet holes (4).

To encourage this air flow from the rear area of the insole towards the front, it has been planned that in the heel area and embedded in the spongy pad and slightly displaced upwards, a flexible and waterproof sheet (8) will be established, located in opposition to the air inlet hole (3), capable of blocking said hole (3) with the pressure exerted by the heel of the foot on the posterior area of the insole, forcing the air contained in the spongy pad (5) to move towards the front.

Finally, it only remains to note that, as can be seen in Figure 4, the spongy pad (5) does not completely fill the chamber defined by the lower (1) and upper (2) layers, leaving a perimeter gap (9). , which due to the configuration of the template itself will be greater in the posterior area of said template.

Finally, note that the lower layer (1) has a thickening that affects its posterior portion (11) and that mainly affects its lateral vertical sections, as can be seen in Figure 4, a thickening that facilitates the recovery due to elasticity of the original form.

Claims (6)

1a.- Ventilated insole for footwear, made up of a multi-layer structure, in which a lower layer (1) of flexible material in the shape of a cup is defined, to which an upper layer (2) is fixed on the perimeter and above, equipped with an air inlet hole (3) in correspondence with the middle area of the heel, and air outlet holes (4) in correspondence with the anterior area of the insole, characterized in that the lower layers (1) and The upper part (2) defines an internal chamber whose thickness progressively increases posteriorly, and within which a spongy pad (5) is arranged made of a porous material with a high air retention capacity, with the particularity that in correspondence with The metatarsal support area of the foot, the chamber includes a transverse band (7), which occupies the entire width of the bottom of the chamber from side to side, made of a flexible material that insulates the passage of air, with a height less than the height that the chamber presents in said area in an inoperative situation, and that in a situation of pressure on said area it is susceptible to dividing the chamber into two parts, preventing the passage of air from the posterior area to the previous one, causing the entry of air towards the heel area of the insole, while in a situation of pressing the foot on the heel area said transverse band (7) defines an upper passage within the chamber for the flow of air from the heel area to the heel area. anterior area and its exit through the air outlet holes (4), providing in the heel area and embedded in the spongy pad (5) a flexible and waterproof sheet (8), capable of blocking the hole ( 3), the lower layer (1) presenting a thickening (10) in the toe area, which occupies the entire interior volume of the insole in that area, the lower layer (1) also presenting a thickening in its posterior portion, which mainly affects its lateral vertical sections. 2a.- Ventilated insole for footwear, according to claim 1a, wherein the spongy pad (5) includes a series of perforations (6) that occupy approximately the entire posterior half, affecting the area of the heel and heel, with the exception of a small one. area coinciding with the air inlet hole (3). 3 a.- Ventilated insole for footwear, according to claim 1a, wherein the spongy pad (5) is obtained from polyurethane foam. 4a.- Ventilated insole for footwear, according to claim 1a, wherein the spongy pad (5) is obtained from technological materials for 3D printing. 5 a.- Ventilated insole for footwear, according to claim 1a, characterized in that the flexible and waterproof sheet (8) is located closer to the air inlet hole (3) than to the lower layer (1). 6a.- Ventilated insole for footwear, according to claim 1a, wherein the spongy pad (5) does not completely fill the chamber defined by the lower (1) and upper (2) layers, leaving a perimeter gap (9).