EP1845816B1 - Item of footwear with integrated midfoot roll - Google Patents

Abstract

The invention relates to an item of footwear which has an integrated midfoot roll and of which the upper is connected to an insole and an outsole shell (5). According to the invention, the outsole shell (5) contains two mouldings (3, 4) located one above the other, wherein the moulding (4), which is arranged at the bottom of the outsole shell (5), is harder than the moulding (3), which is located on top, and the outsole shell (5), and wherein the top moulding (3) is softer than the outsole shell (5).

Description

The present invention relates to a footwear with integrated midfoot roller according to claim 1.

It is well known that the human foot is exposed to extreme stress throughout its life. Adding factors such as incorrect footwear, obesity, or physical activity overload can often cause discomfort to the hock, Achilles tendon, or entire metatarsal area.

The ankle joint is the connecting element between foot and leg and, like the knee joint, is under the entire load of the body. Due to the mentioned high stress such as age, obesity and sport, it is not uncommon for a cartilage wear and the often described osteoarthritis, which hinders the natural movement and rolling process.

The Achilles tendon, which represents the extension of the calf muscles and sinewy on the heel bone, is already under normal stress strongly demanded. As the strongest tendon of the body, it is indeed designed for it, but unfortunately, it comes with years of wearing partly too high heel shoes and consequent jerky stretching and contracting the tendon at every step again and again to inflammations that make painless walking almost impossible.

But not only the wearing of high heels, but also the years of walking and standing on hard flat floors will permanently affect the feet.

Since the natural vault support is missing on soft ground, as in barefoot walking, the longitudinal and transverse vault will decrease over time. Too much lowering of the transverse arch leads to a splayfoot. The metatarsal heads sink and stand up completely. Also in this case, a pain-free rolling while walking is no longer given.

Since all the complaints listed are restrictions on the rolling process when walking or running, the orthopedic shoemaker in these cases often wears material on the bottom of the shoe sole in the midfoot area. The transitions are balanced to the sole of the sole and heel, creating a kind of role, the apex of which is usually below the 3 wedge-roots of the tarsal root. The so-called midfoot roller helps the wearer to stabilize and roll off gently. It relieves the function of the tarsal joints and the upper ankle pain are relieved and the tension change of the Achilles tendon is attenuated.

Unfortunately, placing material on the outsole underside always gives the shoe an orthopedic and clumsy look. Even with conventional comfort shoe manufacturers who carry models with metatarsal role in their program, the soles of the shoe still have the typical balloon or swing-like appearance.

From the WO 0115560 A1 is a footwear known in which the role is designed even more pronounced than usual. This is intended to deliberately destabilize the foot. The goal is to strengthen all muscles that are in the immediate vicinity of the movement axis. It is therefore a training device with therapeutic effect, in which the optics also plays a minor role.

Furthermore, many shoe soles or shoes are known which include an integrated soft bedding or support. Inserted foam parts in soles or removable footbeds in shoes should cushion the heel and forefoot area or support the ankle. While many of these shoes are fashionably styled, they do not take into account the needs of the aetiology mentioned for which a midfoot role would provide relief.

A footwear with integrated metatarsal roll is off US 2002/0178621 A known.

Object of the present invention is to provide a footwear, which takes into account the needs of the wearer for ankle, midfoot or Achilles tendon, while making it possible to dispense with the conventional on the outsole externally constructed metatarsal, in particular to make the outsole look more free.

This object is achieved by a footwear with integrated midfoot roller with the features of claim 1.

The solution is characterized in particular by the fact that only two molded parts, preferably of polyurethane (PU foam) or of another damping material to be set in different degrees of hardness, are incorporated in the sole shell of the footwear and arranged one above the other. The sole shell is connected to the upper construction consisting of upper stock and soft cover insole in a conventional manner.

The special shape, arrangement and hardness adjustment of the inserts and the hardness adjustment of the sole shell result in connection with the shaft construction when walking, an effect that is comparable to a metatarsal roll attached to the outsole.

Preferred embodiments of the invention will become apparent from the subsequent claims to the main claim.

Figur 1:

ein Schuhwerk mit integrierter Mittelfußrolle in perspektivischer Explosionsdarstellung gemäß einer Ausführungsform der vorliegenden Erfindung,

Figur 2:

eine Draufsicht einer Laufsohlenschale für ein Schuhwerk mit integrierter Mittelfußrolle,

Figur 3:

einen Querschnitt einer Laufsohlenschale für ein Schuhwerk mit integrierter Mittelfußrolle in einem Ausschnitt des Vorfußbereiches,

Figur 4:

einen Querschnitt einer Laufsohlenschale für ein Schuhwerk mit integrierter Mittelfußrolle in einem Ausschnitt des Rückfußbereiches,

Figur 5:

einen Längsschnitt einer Laufsohlenschale mit integrierter Mittelfußrolle,

Figur 6:

einen Querschnitt einer Laufsohlenschale für ein Schuhwerk mit integrierter Mittelfußrolle in einem Ausschnitt des Mittelfußbereiches,

Figur 7:

ein unteres Formteil für ein Schuhwerk mit integrierter Mittelfußrolle in perspektivischer Darstellung,

Figur 8:

Momentaufnahme beim Abrollvorgang mit einem Schuhwerk mit integrierter Mittelfußrolle,

Figur 9:

eine andere Momentaufnahme beim Abrollvorgang mit einem Schuhwerk mit integrierter Mittelfußrolle und

Figur 10:

eine dritte Momentaufnahme beim Abrollvorgang mit einem Schuhwerk mit integrierter Mittelfußrolle.

Further features, details and advantages of the invention will become apparent from the embodiment illustrated in the drawing. Show it:

FIG. 1:

a footwear with integrated metatarsal roll in an exploded perspective view according to an embodiment of the present invention,

FIG. 2:

a top view of an outsole shell for footwear with integrated metatarsal,

FIG. 3:

a cross-section of an outsole shell for footwear with integrated metatarsal in a section of the forefoot area,

FIG. 4:

a cross section of an outsole shell for footwear with integrated midfoot roller in a section of the hindfoot area,

FIG. 5:

a longitudinal section of an outsole shell with integrated metatarsal,

FIG. 6:

a cross section of an outsole shell for footwear with integrated midfoot roller in a section of the midfoot area,

FIG. 7:

a lower molded part for footwear with integrated midfoot roller in a perspective view,

FIG. 8:

Snapshot during the rolling process with a footwear with integrated midfoot roller,

FIG. 9:

another snapshot during the rolling process with a footwear with integrated metatarsal and

FIG. 10:

a third snapshot during the rolling process with a footwear with integrated metatarsal roll.

An inventive footwear with integrated metatarsal, referred to below as footwear, consists as in FIG. 1 represented, from a top 1, which is connected to a cover insole 2, and two molded parts 3, 4, which are incorporated in an outsole shell 5 superimposed.

The upper 1 and the upper 2 insole are preferably made of soft leather or a synthetic material and are, as in FIG. 1 shown connected to a shank construction with a zigzag seam or with a Bestchnaht or by bonding conventionally.

The outsole shell 5 is conventionally connected to the shaft construction 1, 2 likewise by gluing or sewing.

The molded parts 4, 3, as well as the outsole shell 5, preferably consist of a PUR foam or of another damping material to be set in different degrees of hardness. The molded part 3 lying in the outsole shell 5 above is as in FIG FIG. 2 , shown up to an edge of about 10-12 mm flat.

In the FIG. 3 and FIG. 4 can be seen in cross-section, as the molded part 3 is incorporated in a section of the forefoot portion 5A and 5C in a section of the hindfoot region. The height of the molded part 3 in the forefoot area 5 A is preferably at least 6 mm and in the rear foot area 5 C is preferably at least 8 mm. The molded part 3 is, as in FIG. 5 shown in the midfoot area 5 B arranged above the molded part 4. It is about 4 to 6 mm high above its apex.

In principle, the height of the molded part 3 but to adapt to the special needs of the wearer. It can be z. B. the weight of the carrier are taken into account.

The molded part 4 incorporated in the outsole shell 5 below the molded part 3 is, as in FIG FIG. 5 shown, and also in FIG. 7 can be seen, wedge-shaped at the front and rear and tapers in the direction of the hindfoot area 5 C and forefoot area 5 A. The molding 4 is in the midfoot area 5 B as in FIG. 6 shown along the inner longitudinal arch 5 D higher than in the region of the outer longitudinal arch 5 E. The general height can be adapted to the needs of the wearer.

The molded parts 3, 4, and the outsole shell 5 are set in different degrees of hardness. The molded part 4 incorporated in the outsole shell 5 below the molded part 3 is harder than the molded part 3 and the outsole shell 5, wherein the molded part 3 is softer than the outsole shell 5.

The molded parts 3 and 4 are, as in FIG. 5 and also FIG. 6 seen so incorporated into the shape of the outsole shell 5, that after insertion of the z .B. PUR foam material are firmly enclosed by this. Only in the plan view of the outsole shell, as in FIG. 2 shown to see the above incorporated molding 3.

Due to the soft cover insole 2, the foot presses when walking or running with the footwear in the first phase of the rolling process ( FIG. 8 ) in the soft molded part 3 in the rearfoot region 5 C of the outsole shell. In the second phase ( FIG. 9 ), the foot rolls over the harder molding 4 in the midfoot region 5 B, and in the third phase ( Figur10 ) in the soft forefoot 5 A of the molding. 3

The average hardness setting of the outsole shell 5 dampens the entire process. The appearance of the outsole shell is largely free to design.

Claims (8)

1. Footwear with an integrated midfoot roll whose upper (1) is connected to a sock lining (2) and to an outsole shell (5),
   characterised in that
   only two moulded parts (3, 4) are arranged lying above one another in the outsole shell (5), with the moulded part (4) arranged at the bottom in the outsole shell (5) forming the integrated midfoot roll and being harder than the upwardly disposed moulded part (3) as well as than the outsole shell (5); and in that the upwardly disposed moulded part (3) is softer than the outsole shell (5).
2. Footwear in accordance with claim 1, characterised in that the moulded parts (3, 4) comprise a material which can be set with different degrees of hardness, for example PUR foam.
3. Footwear in accordance with either of claims 1 or 2, characterised in that the outsole shell (5) having the integrated moulded parts (3, 4) is permanently connected to an upper construction which comprises the upper (1) and the sock lining (2), with the sock lining (2) being so soft that the foot can be pressed into the moulded parts (3, 4) of the outsole shell (5).
4. Footwear in accordance with one of the preceding claims, characterised in that the upwardly disposed moulded part (3) is areally connected to the outsole shell (5) except for a margin of around 10 to 12 mm.
5. Footwear in accordance with one of the preceding claims, characterised in that the position of the downwardly disposed moulded part (4) is located in the midfoot region.
6. Footwear having an integrated midfoot roll in accordance with one of the preceding claims, characterised in that the height of the moulded part (3) amounts to at least 6 mm in the forefoot region, to at least 8 mm in the rearfoot region and to around 2 to 4 mm in the midfoot region above the apex of the moulded part (4).
7. Footwear having an integrated midfoot roll in accordance with one of the preceding claims, characterised in that the moulded part (3) is made as wedge-shaped within the outsole shell (5) in the direction of the rear foot and forefoot regions and has different heights in the regions of the outer arch of the foot and of the inner arch of the foot.
8. Footwear having an integrated midfoot roll in accordance with one of the preceding claims, characterised in that, after the injection of the material which the moulded parts (3, 4) comprise, the moulded parts are firmly surrounded by said material within the outsole shell (5), with only the upper moulded part (3) being able to be seen in the plan view of (5).

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