FR2838027A1 - Relaxation footwear insole is made from plastic foam material with cavity beneath calcaneum filled with latex foam containing cork particles - Google Patents

Abstract

The insole (1) comprises a body of constant thickness, made from a plastic foam material with a hardness of 30 - 35 Shore A and a density of about 100 kg/cu m, with a cavity in the zone (2) beneath the calcaneum or heel bone, filled with an elastic material such as latex foam and cork particles. The insole is covered with a thin layer of foam and a film of a non-woven material which is raised in the calcaneum zone by about 1 mm. It can also incorporate inserts in the metatarsal zones (3, 4).

Description

the galega and the bean pod.

  The subject of the present invention is a relaxation sole intended to be

  introduced into a shoe and capable of providing a feeling of well-being to the user.

  The present invention aims in particular to improve the soles of

  existing relaxation, in particular that described in patent FR 2 765 779.

  It achieves this thanks to a new relaxation sole, characterized in that it comprises: - a sole body having an upper face and a lower face, comprising a housing in the support region under the calcaneus, this housing smoothing less on the underside, - an elastically deformable structure disposed in the housing of the sole body, - a skin covering the upper face of the sole body and the elastic structure. In a claimed implementation of the invention, the housing of the sole body also opens onto the upper face thereof and the elastic structure is

  configured to form a slight bump with the skin covering the sole body.

  The presence of the elastic structure in the housing of the sole body makes it easy to obtain support under the calcaneus generating a rebound effect, which corresponds to a projection from the rear of the foot towards the front, thus creating a dynamic

  contributing to the well-being of the user.

  In particular, when the housing is through, one can have therein an elastic structure which extends at least over the entire thickness of the body of the sole. In patent FR 2 765 779, the elastic properties of the support under calcanenm are imparted by an elastomer element molded onto the body of the sole. I1 follows that to benefit from a significant rebound effect, the thickness of this element must be relatively large. If the latter has, for manufacturing reasons, less elasticity than that required, the sole becomes uncomfortable, which is contrary

to the desired goal.

  In the invention, the elastic structure can have a relatively large thickness capable of imparting a significant rebound effect, while avoiding this problem. Indeed, even if the elastic structure accidentally has a lower elasticity than expected, this does not cause any discomfort in the absence of boss of significant height. The elastic structure may consist of a block of an elastically deformable material, for example. As a variant, the structure can be multilayer, for example bilayer, with at least one layer of an elastically deformable material. In an exemplary implementation of the invention, the elastic structure comprises an elastically deformable material comprising a latex foam and particles of cork dispersed in the latex foam. This material has a hardness

less than the sole body.

  The elastic structure can be held in the housing of the sole body by gluing, but other methods of attachment can be used without

  is beyond the scope of the present invention.

  The height of the boss in the support region under the calcaneus can be

  for example between 0.1 mm and 3 mm, preferably being about 1 mm.

  In an exemplary implementation of the invention, the sole comprises, in a support region under the first two metatarsals or in a support region under the last three metatarsal heads, or in both regions at the same time, one or more

  inserts sandwiched between the sole body and the skin.

  This or these inserts may include one or more sheets of agglomerated cork. The sole body can be made of a plastic foam, for example a polyethylene foam of Shore A hardness between 30 and 35 and of

  density close to 100 kg / m3.

  In an exemplary implementation of the invention, the skin comprises a layer of foam, in particular of polyurethane, covered with a film, in particular of a

washable nonwoven film.

  This skin may have received anti-bacterial and / or anti-fungal treatment.

  The sole body may have, in cross section in a plane

  perpendicular to the longitudinal axis of the sole, a substantially constant thickness.

  The sole may have a substantially flat upper face in the heel region, possibly excluding the boss linked to the presence of the

elastic structure.

  The invention also relates to and a shoe equipped with a sole of

relaxation as mentioned above.

  The invention will be better understood on reading the detailed description

  which follows, of an example of non-limiting implementation, and on examination of the appended drawing, in which: - Figure 1 schematically and partially, in top view, a sole according to the invention, - Figure 2 is a schematic and partial view, from the side, of the sole of Figure 1, - Figure 3 shows schematically and partially, in section along III-III, the sole of Figure 1, and - Figure 4 shows schematically and partially, in section

  transverse, the skin of the sole of FIG. 1.

  FIG. 1 shows a sole 1 according to the invention, 1 S comprising a support 2 under the calcaneus, a support 3 under the first two metatarsals and a support 4 under the last three metatarsal heads. For more details on the location of these supports 2, 3 and 4, reference may be made to patent FR 2 765 779, the

  content is incorporated herein by reference.

  In the example illustrated, the support region 2 under the calcaneus has a

  substantially ovodal shape with a major axis directed towards the front of the sole.

  As shown in FIG. 3 in particular, the sole 1 comprises a sole body S made of a polyethylene foam, for example the foam sold under the name PODOFOAM XA 800 by the company PODOFRANCE, which is washable and rot-proof, has good properties flexibility and support, good mechanical resistance, good thermal insulation, good resistance to chemical agents and provides a feeling of

soft to the touch.

  The sole body S comprises a housing passing through the support region 2 under the calcaneus, this housing opening onto its lower faces Sa and

superior 5b.

  The housing 6 receives an elastically deformable structure 7 making it possible to

  give support 2 a significant rebound effect.

  In the example described, this structure 7 is constituted by a block of foam

  latex containing cork particles.

  As can be seen in Figure 3, the structure 7 forms with a skin 10 which adheres to the upper face 5b of the sole body 5, a boss 8 whose height h is about 1 mm. The skin 10 comprises a nonwoven material 11 lined with a thin layer 12 of polyurethane foam, as illustrated diagrammatically in FIG. 4. This skin has a low sensitivity to variations in humidity, a good resistance to

  sweating and anti-bacterial and anti-fungal properties.

  The structure 7 is inserted into the housing 6 and is held there by gluing.

  The supports 3 and 4 are obtained by placing in the corresponding regions two sheets of agglomerated cork 15, sandwiched between the sole body 5 and the

  skin 10, as illustrated in FIG. 2.

  Of course, the invention is not limited to the example which has just been described.

  Thus, instead of inserting the structure 7 in the housing 6, one can for example

  inject a foam directly into it.

Claims (10)

  1. Relaxation sole (1), characterized in that it comprises: a sole body (5) having an upper face and a lower face, comprising a housing in the support region (2) under the calcaneus, this housing opening at least on the lower face (Sa), - an elastically deformable structure (7) disposed in the housing of the sole body, - a skin (10) covering the upper face (5b) of the body of sole and elastic structure.   2. Sole according to the preceding claim, characterized in that the   elastic structure (7) consists of a block of an elastically deformable material.   3. Sole according to the preceding claim, characterized in that the elastically deformable material consists of a latex foam containing cork particles.   4. Sole according to any one of the preceding claims,   characterized in that the elastic structure is held in the housing (8) by gluing.   5. Sole according to any one of the preceding claims,   characterized in that the elastic structure (7) forms with the skin (10) a boss (8) in the bearing region under the calcaneus whose height (h) is between 0.1 mm   and 3 mm, being preferably about 1 mm.   6. Sole according to any one of the preceding claims,   characterized in that it comprises, in a support region (3) under the first two metatarsals or in a support region (4) under the last three metatarsal heads, or in both regions at the same time or more inserts taken into   sandwich between the sole body and the skin.   7. Sole according to the preceding claim, characterized in that the   or the inserts comprise one or more sheets (15) of agglomerated cork foam.   8. Sole according to any one of the preceding claims,   characterized in that the sole body (5) is made of a plastic foam, in particular of polyethylene with Shore A hardness between 30 and 35 and of   density of the order of 100 kg / m3.   9. Sole according to any one of the preceding claims,   characterized in that the skin has a thin layer of foam (12), in particular   of polyurethane, covered with a film (11), in particular with a nonwoven film.   10. Sole according to any one of the preceding claims,   characterized in that the sole body has, in cross section in a plane perpendicular to the longitudinal axis of the sole, a substantially constant thickness.