SI20706A2 - Elastic footwear heel - Google Patents

Abstract

An elastic footwear heel, also a special one such as orthopaedic brace or plaster cast, is carried out as a plate (1) shaped preferentially in the form of a wedge with one face (2) inclined and running parallel and quite close to the inner layer (3) of any kind of footwear (A) and with another, opposite lower face (4), which makes a part of the footwear sole (5). Between the faces (2 and 4) of the plate (1), there is a spring element (6) carried out as an elastic tape in the shape of the lying character V and a damping element (7) acting as a damper or shock absorber. Both elements (6 and 7) within the plate (1) are closed on their sides by a flexible lining (8) of any shape which protects the heel interior from moisture and dirt.

Description

The object of the invention is an elastic heel of various types of shoes, including special ones, e.g. orthopedic ah even gypsum wraps.

A technical problem

The technical problem solved by the invention is how to design such an elastic heel of the shoe that will be adjustable to any shoe, without altering its appearance and providing firm footing.

The prior art

Known elastic heels are made entirely of elastic material, e.g. tires ah foam tires. In a special design, the heel is multi-layered. Elastic material is used for one intermediate layer, the lower hiking layer is made of mechanically resistant and profiled rubber material, and the inner layer is such that it can be properly fitted to the upper part of the shoe.

Further known is the heel for sports shoes, which include transverse rods made of elastic material, while the sole together with

27607-2.DOC / XI-00 / D25-Vr heel parts made of harder material. These elastic inserts with different elasticity can also be changed according to different needs.

The disadvantage of both solutions is that such a heel is not stable at a relatively low extrinsic load. Walking with such a shoe requires more attention, especially when walking on rough terrain. When walking or even running on a sloping surface, shear forces occur, which strongly deform the sole of the sole, causing an uneasy feeling and reducing the balance of the wearer. Such an unpredictable transformation of the shoe means more effort for the foot and ankle tissues, as well as a danger or a greater chance of ankle sprain.

Furthermore, this type of heel is known with a metal spring insert in the form of a leaf or spiral spring. The disadvantage of this solution is that the spring compresses and softens the impact on the skeleton when stepping, but in relieving the foot, the spring acts with accumulated force on the foot, resulting in the disturbing feeling of walking as if it were being pushed forward, resulting in has to chase balance. Therefore, these solutions have not received mass acceptance among customers.

The following solutions are not suitable for different patients eg. with a broken leg, hip, spine. These people are quite unstable when walking because of muscle pain and atrophy, but they need shoes to soothe skeletal bumps when walking, especially on a hard surface without a softer sole affecting walking balance.

The solution to a technical problem

The solution of the described technical problem according to the invention is that the spring element in the heel allows elastic shrinkage of the heel only in the direction perpendicular to the base, or in the axis of the person, while preventing the oblique inclination of the heel in an asymmetrical load. There is also a damping element in addition to the spring element

27607-2. DOC / XI-00 / D25-Vr The compression speed of the spring, and especially when the spring is unloaded, extends it. This eliminates the unwanted feeling that the shoe forces the walking forward out of balance. However, the feeling remains that walking is less tiring or less strenuous.

In addition, the elastic insert according to the invention does not affect the external appearance of the shoe, thereby allowing it to be arbitrarily shaped.

The essential features of the invention will be explained below based on the description of an embodiment shown in the accompanying drawing, in which FIG. 1 shows a longitudinal section of a shoe with an elastic heel according to the invention; 2 is an elastic heel of the invention in cross-section.

The elastic heel of the invention is designed as a plate 1, preferably a wedge-shaped one, one of its oblique surfaces 2 extending in parallel and just below the inner layer 3 of any shoe A. The other, opposite lower surface 4 of the plate 1 forms part of the shoe sole 5. Between the surfaces 2 and 4 of the plate 1, a spring element 6 is arranged, which is made as a strip in the sense of the letter V, which enables the plate 1 to be opened and pressed under different load of a person. As the arms of the spring element 6 are flat, they provide parallel displacement or offset even in extra-axial loading. This protects the foot and ankle from any bumps or excuses for turning the shoe.

In the area of panel 1, preferably between the arms of element 6, an additional damping element 7 of any known construction is inserted to act as a damper or shock absorber. This ensures that the speed of compression and opening of the elastic element 6 during walking is slowed down, in particular, it is important that the speed of expansion is slower, which results in no longer feeling the unpleasant force of the spring at

27607-2.DOC / XI-00 / D25-Vr heel relief. However, in the spring, the accumulated force is released when the shoe is unburdened, which makes walking feel like less strenuous walking. The elastic element 6 together with the damping element 7 is closed in the panel 1 from the sides by a flexible lining 8 of any shape, which protects the inside of the heel from moisture and dirt.

The damping element 7 is made of an elastic material, preferably rubber. The selected hardness determines the relationship between the elasticity of the heel and its response rate when walking. The choice depends on the type and purpose of the shoe.

Claims (2)

Patent claim 1. Elastic heel for any shoe, also special, e.g. orthopedic or gypsum plating, in the form of a plate (1), preferably wedge-shaped, with one oblique surface (2) extending in parallel and just below the inner layer (3) of any shoe (A) and another opposite opposite surface (4) forming part of the sole (5) of the shoe, characterized in that a spring element (6) is provided between the surfaces (2 and 4) of the plate (1), which is formed as an elastic band in the sense of the letter V, and a damping element element (7) acting as a damper or shock absorber, the elements (6 and 7) in the panel (1) being closed from the sides by a flexible lining (8) of any shape, which protects the inside of the heel from moisture and dirt. Elastic heel according to claim 1, characterized in that the damping element (7) is made of an elastic material, preferably rubber or the like.