DE102021126214A1 - Afferstimulating shoe insert - Google Patents

Abstract

The invention relates to an afferent-stimulating shoe insert (1) in a multi-layer composite construction, comprising a cover layer (2), a support layer (4) and an intermediate layer (3) arranged between the support layer (4) and the cover layer (4), the layers (2, 3, 4) are connected to one another with a material fit, the support layer (4) being arched to correspond to an arch of the foot and a heel and having an edge (11), the edge (11) being on both an edge section facing a front side (5) and an edge recess (9.1, 9.2) and a tongue (10.1, 10.2) arranged laterally transversely to the longitudinal direction (L) next to the edge recess (9.1, 9.2). ), wherein the tongues (10.1, 10.2) and the edge cut-outs (9.1, 9.2) each merge into an edge section facing an outside (7) or inside (8), wherein when a foot rests on the shoe insert (1), a sole of the foot rests on the cover layer (2), the support layer (4) extends in the longitudinal direction (L) from a plantar heel area to a plantar metatarsal area and can be twisted along the longitudinal direction (L) as a result of a torsional load on the foot in such a way that the torsional load in the support layer (4) a torsional prestress is built up and the support layer (4) counteracts the torsional load in a torsion-resilient manner, the intermediate layer (3) and the cover layer (2) extending in the longitudinal direction (L) from the plantar heel area into a plantar toe area and wherein the two edge recesses (9.1, 9.2) of the support layer (4) are each arranged in a plantar medial or in a plantar lateral area.

Description

The invention relates to an afferent-stimulating shoe insert in a multi-layer composite construction, comprising a cover layer, a support layer and an intermediate layer arranged between the support layer and the cover layer. The support layer is arched in a manner corresponding to an arch of the foot and a heel and has an edge which has an edge recess both on an edge section facing a front side and on an edge section opposite in a longitudinal direction and facing a rear side and a side cutout transverse to the longitudinal direction tongue arranged in the edge recess.

Afferent-stimulating orthotics, also called proprioceptive or sensorimotor orthotics, are a subset of orthopedic orthotics. Afference-stimulating shoe inserts use the high sensorimotor function of the sole of the foot to improve the gait pattern by usually triggering targeted sensorimotor impulses in the foot muscles via pressure points.

A support layer for an afferent-stimulating shoe insert is DE 10 2018 009 262 A1 disclosed. The support layer is curved here, corresponding to the arch of the foot and a heel of a human foot, and has cheeks that stand up laterally in this area. In relation to a foot placed on it, it extends in a longitudinal direction from the plantar heel area to the metatarsal area. An edge of the support layer has an edge recess and a tongue arranged laterally next to it, transversely to the longitudinal direction, on an edge section facing a front side and on an edge section facing a rear side lying opposite in the longitudinal direction. The edge recesses and the tongues are arranged in the plantar medial or lateral area depending on the therapy or correction requirement. By means of this arrangement of the edge cutouts and tongues in the support layer, this can be used for a correction in a physiologically desired gait pattern. However, the use of this support layer by itself as a shoe insert offers only little wearing comfort, since the support layer is made of a hard material.

There is therefore a need for an afferent-stimulating shoe insert with the support layer mentioned above, which offers a wearer a high degree of wearing comfort.

The object of the present invention is to further develop an afferent-stimulating shoe insert of the type mentioned at the outset in such a way that steering into a physiologically desired gait pattern is improved.

The invention has the features of patent claim 1 in order to achieve the object. Accordingly, an afferent-stimulating shoe insert in a multi-layer construction comprises a cover layer, a support layer and an intermediate layer arranged between the support layer and the cover layer. The layers (covering layer, intermediate layer, supporting layer) are firmly bonded to one another. The supporting layer is arched corresponding to a foot arch (longitudinal and transverse arch) and a heel and has an edge. The edge has an edge cut-out both on an edge section facing a front side and on an edge section opposite thereto in a longitudinal direction and facing a rear side and a tongue arranged laterally transverse to the longitudinal direction next to the edge cut-out, the tongues and the edge cut-outs each being in one pass over an edge section facing the outside or inside. When the foot rests on the insole, a sole of the foot rests on the top layer. The support layer extends in the longitudinal direction from a plantar heel area to a plantar metatarsal area and can be twisted along the longitudinal direction as a result of a torsional load on the foot in such a way that a torsional prestress is built up in the support layer and the support layer counteracts the torsional load in a torsion-resilient manner. The intermediate layer and the top layer extend in the longitudinal direction from the plantar heel area to a plantar toe area. The edge recesses of the support layer are both located in a plantar medial or plantar lateral area.

The anatomical position specifications medial and lateral refer to the middle of the human body. Medial means sideways towards the middle of the body, lateral means sideways away from the middle of the body. Referring to the human foot, medial means facing towards the inner instep or the inside and lateral towards the outer instep or the outside. The anatomical term plantar means belonging to the sole of the foot or pertaining to the sole of the foot. In relation to the afferent-stimulating shoe insert according to the invention, the terms plantar, medial and lateral are always used in the context of a foot placed on the shoe insert or the sole of the foot.

The shoe insert according to the invention is preferably individually adapted to the orthopedic requirements of a human wearer, in particular with regard to the shape of the supporting layer. Nevertheless, there is also an industrial production Supply of the shoe insert according to the invention in different shoe sizes possible.

The support layer is preferably made in one piece. The layers are materially bonded to one another and are preferably bonded to one another over a large area.

The particular advantage of the invention is that a wearer in the area of the specifically arranged edge cutouts of the support layer is able to directly transfer ground reaction forces via the cover sole of a shoe into the sole of the foot and thus a targeted correction or stabilization in a physiologically desired gait pattern.

For this purpose, the support layer can be twisted along the longitudinal direction as a result of a torsional load caused by the foot placed on the shoe insert. A twisting load within the meaning of the invention occurs when the foot placed on the shoe insert is twisted in the longitudinal direction as a result of a malposition, in particular due to supination, pronation, abduction or adduction. This misalignment of the foot causes the support to be subjected to a torque load which causes torsional twisting of the support. As a result, a torsional prestress is built up in the support layer, as a result of which the support layer counteracts the torsional load in a torsion-resilient manner. A resistance of the support layer to the torsional load is preferably selected in a defined manner and can be designed differently in the front area of the support layer and in the rear area of the support layer, depending on which correction result is pursued by wearing the shoe insert according to the invention. A torsional resistance moment of the support layer can be set, for example, via its layer thickness or material thickness or, for example, via a fiber orientation. The shoe insert according to the invention is adapted to a desired foot position for the foot placed on the shoe insert according to the invention. This means that when the foot is placed on the shoe insert in the desired foot position, the supporting layer is not twisted by the torsional load and is therefore essentially free of torsional stress. If the supporting layer is twisted by the torsional load that occurs as a result of a malposition of the foot that deviates from the desired foot posture, it counteracts the torsional load in a torsion-resilient manner. This means that it exerts a torque that counteracts the misalignment. When wearing the shoe insert according to the invention, the foot is regularly and actively corrected mechanically by the support layer in the case of malpositions of the foot or the wearer experiences a haptic, oppressive signal from the afferent-stimulating shoe insert according to the invention, as a result of which he is conditioned to the predetermined, desired foot position when the shoe insert is worn for a long time.

On the other hand, the support layer has edge recesses in the plantar heel and midfoot area for correcting the foot posture or the gait pattern, which are arranged in the plantar lateral or medial area depending on the desired gait pattern or therapy requirement. In addition, the support layer extends from the plantar heel area up to the plantar metatarsal area or at the level of the metatarsal bones. A rear tongue of the support layer facing the rear preferably extends to the rear end of the heel bone. A front tongue of the support layer facing the front preferably extends to the toe-side end of the underlying metatarsal bones. The plantar toe area is therefore exclusively on the top and middle layers of the shoe insert according to the invention, so that the ground reaction forces can be transferred from the cover sole of the shoe almost directly, i.e. almost undamped, to the plantar toe area and the foot can roll off correctly when walking or running .

The correction of the gait pattern specifically caused by the shoe insole according to the invention affects the entire body of a wearer and can alleviate or eliminate physical complaints, in particular in the foot, knee, hip and back areas, but also in the neck and jaw area, and thereby promotes it the upright walk.

At the same time, the supporting layer is dimensioned and shaped in such a way that a foot placed on the insole according to the invention is supported and stabilized from the plantar heel area to the metatarsal area. For this purpose, the support layer is shaped to correspond to the arch of the foot (longitudinal and transverse arch) and the heel of a human foot, so that twisting in the form of supination or pronation of the foot is prevented as far as possible and the ground reaction forces or the pressure acting on the foot from the ground are evenly distributed a three-point support arrangement distributed to the heel, midfoot and arch. This elastic support of the arch of the foot results in an even weight distribution in the foot and thus a reduced load.

According to a preferred embodiment of the invention, the layers of the shoe insert according to the invention are curved in the plantar heel area and in the area of the arch of the foot in such a way that they are pulled up towards the outside and inside side cheeks are formed. When the foot is placed on the shoe insole, its heel and arch are guided between the raised lateral cheeks or can be guided into a physiologically desired gait pattern via the cheeks in addition to the edge recesses and tongues in the support layer.

According to a development of the invention, at least one pad with a plantar toning or detonizing effect or at least one pressure point with a plantar toning or detoning effect is provided in at least one of the layers. The pads or pressure points trigger sensory impulses in a foot worn by the insole according to the invention, which address the activity of individual muscles or muscle groups of the foot and thereby change the gait in a targeted manner. The muscle tension is increased or the muscles tensed with the toning pads or pressure points. They can be formed by local material elevation, thickening or hardening in at least one of the layers. The muscle tension is reduced or the muscles relaxed with the pads that have a detonizing effect or pressure points. These pads or pressure points can be formed by a local material weakening, thinning or relaxation in at least one of the layers.

The pad preferably has a plurality of pressure points that have a plantar toning or detoning effect. A plurality of pads can also be incorporated into the shoe insert according to the invention, depending on which physiological gait pattern or which orthopedic function is to be realized by wearing the shoe insert according to the invention.

According to a development of the invention, the supporting layer is made of thermoplastic material or of fiber composite material or preferably of carbon. In this respect, the support layer advantageously has high rigidity and strength with a low density and can be manufactured with a small layer thickness.

The supporting layer is produced, for example, by means of an additive manufacturing process or by means of a 3D printing process. This makes it possible to flexibly manufacture the shoe insert according to the invention, even in small quantities. In addition, weight advantages can result.

According to a development of the invention, a first protective layer is provided between the intermediate layer and the supporting layer, which in particular covers the front tongue and the front edge opening of the supporting layer. The first protective layer serves to indicate a defined surface or a seal for the support layer. In particular when the support layer is made of a fiber-reinforced material, the first protective layer prevents any protruding fiber ends of the support layer from penetrating into the intermediate and cover layers and thereby possibly disturbing the wearing comfort of the shoe insert according to the invention.

Analogously to the first protective layer, a second protective layer is preferably provided on a side of the supporting layer opposite the intermediate layer. This second protective layer forms a defined surface or seal for the support layer on the side opposite the support layer, which rests on the cover sole of a shoe when the shoe insole according to the invention is received. In this respect, the cover sole of the shoe is protected by the second protective layer from damage as a result of possibly protruding fiber ends of the support layer.

In addition, the first protective layer and the second protective layer, respectively, prevent injuries or cuts that could otherwise occur as a result of possibly protruding, unsealed fiber ends of the backing layer in contact with the backing layer. Advantageously, the protective layers can be cohesively connected to the support layer and preferably glued to the support layer.

According to a development of the invention, the supporting layer has a different fiber orientation or layer thickness or layer thickness in sections. The fiber layer can direct a supporting effect of the support layer or the introduction of ground reaction forces into the foot supported on the insole, since experience has shown that the strength and rigidity of fiber materials is significantly higher in the direction of the fibers than transversely to the direction of the fibers. Sections of the supporting layer can also have an increased layer thickness or several superimposed layers with different fiber directions if high strength or rigidity is required. A correctable force is defined in this respect via the layer thickness or layer thickness of the supporting layer. A local change in the fiber structure in the support layer can thus provide a direction-dependent toning effect or detonating effect can be achieved or a pressure point or a pad can be formed.

According to a development of the invention, both edge recesses of the support layer are arranged in the plantar-lateral area and both tongues of the support layer are arranged in the plantar-medial area. The support layer accordingly has a longer extension in the longitudinal direction on the medial inner side than on the laterally opposite lateral outer side. This embodiment of the shoe insert according to the invention is particularly advantageous in the treatment or correction of a pes valgus, an abduction or a pronation of the foot.

According to an alternative development of the invention, both edge recesses of the support layer are arranged in the plantar medial area and both tongues of the support layer are arranged in the plantar lateral area. The support layer accordingly has a longer extension in the longitudinal direction on the lateral outside than on the laterally opposite medial inside. This embodiment of the shoe insert according to the invention is particularly advantageous in the treatment or correction of an adduction or supination of the foot.

The front edge recess provided on the front edge of the support layer and the front tongue are preferably provided in the plantar metatarsal area, the front edge recess being arranged at the level of the first to third metatarsal bones and the front tongue being arranged at the level of the fourth and fifth metatarsal bones. This embodiment of the shoe insert according to the invention is particularly advantageous in the treatment or correction of a supinating clubfoot.

• 1 ein erstes Ausführungsbeispiel einer erfindungsgemäßen afferenzstimulierenden Schuheinlage in einer Draufsicht,
• 2 die erfindungsgemäße afferenzstimulierende Schuheinlage nach 1 in einer Innenseitenansicht,
• 3 die erfindungsgemäße afferenzstimulierende Schuheinlage nach 1 in einer Außenseitenansicht,
• 4 die erfindungsgemäße afferenzstimulierende Schuheinlage nach 1 im Vollschnitt A-A aus 1,
• 5 die erfindungsgemäße afferenzstimulierende Schuheinlage nach 1 im Vollschnitt B-B aus 1,
• 6 die erfindungsgemäße afferenzstimulierende Schuheinlage nach 1 im Vollschnitt C-C aus 1,
• 7 die erfindungsgemäße afferenzstimulierende Schuheinlage nach 1 im Vollschnitt D-D aus 1,
• 8 die erfindungsgemäße afferenzstimulierende Schuheinlage nach 1 im Vollschnitt E-E aus 1,
• 9 ein zweites Ausführungsbeispiel einer erfindungsgemäßen afferenzstimulierenden Schuheinlage in einer Isometrieansicht von unten und
• 10 die erfindungsgemäße afferenzstimulierende Schuheinlage nach 9 in einer Draufsicht.

Further advantages, features and details of the invention can be found in the further dependent claims and the following description. Features mentioned there can each be essential to the invention individually or in any combination. The drawings serve only as examples to clarify the invention and have no restrictive character. Show it:

• 1 a first embodiment of an afferent-stimulating shoe insert according to the invention in a plan view,
• 2 the afferent-stimulating shoe insert according to the invention 1 in an inside view,
• 3 the afferent-stimulating shoe insert according to the invention 1 in an outside view,
• 4 the afferent-stimulating shoe insert according to the invention 1 in the full section AA 1 ,
• 5 the afferent-stimulating shoe insert according to the invention 1 in full cut BB off 1 ,
• 6 the afferent-stimulating shoe insert according to the invention 1 in full cut CC out 1 ,
• 7 the afferent-stimulating shoe insert according to the invention 1 in full cut DD out 1 ,
• 8th the afferent-stimulating shoe insert according to the invention 1 in the full cut EE off 1 ,
• 9 a second embodiment of an afferent-stimulating shoe insert according to the invention in an isometric view from below and
• 10 the afferent-stimulating shoe insert according to the invention 9 in a top view.

An afferent-stimulating shoe insert 1 according to the invention 1 until 10 comprises a support layer 4, a cover layer 2 and an intermediate layer 3 arranged between the support layer 4 and the cover layer 2. A first protective layer 13 arranged between the support layer 4 and the intermediate layer 3 is also included in sections. The insole 1 is accordingly made in a multi-layer construction, with the layers 2, 3, 4, 13 being connected to one another in a materially bonded manner and preferably glued.

When the foot is placed on the insole 1, the cover layer 2 faces or is applied to a sole of the foot. For this purpose, the cover layer 2 is preferably made of a material that is soft to the touch and has a low Shore hardness, in order to ensure that it is comfortable to wear. It preferably has a constant layer thickness. The intermediate layer 3 is made of an elastic material and is preferably thicker than the cover layer 2 and the support layer 4 . The support layer 4 forms a foot-supporting layer of the shoe insert 1 which, in a preferred use of the shoe insert 1, is placed in a shoe and rests on the cover sole of the shoe.

The support layer 4 is preferably made of a thermoplastic material or a fiber material and particularly preferably made of carbon heaps of carbon fiber reinforced plastic (CFRP). As a result, the support layer 4 has a low density with high rigidity and strength and can be manufactured with a small layer thickness. A correctable force is defined via a layer thickness or layer thickness of the support layer 4, which can compensate for twisting or a malposition of the foot and thus produce a correction in a desired gait pattern.

When the foot is placed on the afferent-stimulating shoe insert 1, the support layer 4 extends in a longitudinal direction L from a plantar heel area to a plantar metatarsal area. The plantar toe area is therefore unsupported, which ensures a natural foot roll. The intermediate layer 3 and the top layer 2 extend in the longitudinal direction L from the plantar heel area to the toe area in such a way that the entire sole of the foot is provided with a soft or elastic contact surface.

A first embodiment of the afferent-stimulating shoe insert 1 according to the invention is shown in FIGS 1 until 8th specified. The afferent-stimulating shoe insert 1 shown therein is designed for use on a left foot. Of course, the afferent-stimulating shoe insert 1 according to the invention can also be designed as a mirror image for a right foot.

1 shows the afferent-stimulating shoe insert 1 according to the invention in a top view looking at the cover layer 2. An edge 11 of the bottom support layer 4 in this perspective and an edge of the first protective layer 13 are indicated schematically here with dashed lines.

The top layer 2 and the intermediate layer 3 are almost congruent with each other and have an oval contour, which has the greatest width at the level of the plantar metatarsal area and extends to a front side 5 or to the plantar toe area and to an opposite back in the longitudinal direction L 6 or to the tapered oval towards the plantar heel area.

The edge 11 of the support layer 4 has a tongue 10.1, 10.2 and an edge recess 9.1, 9.2 arranged laterally transversely to the longitudinal direction L on an edge section facing the front side 5 and on an edge section facing the back side 6. Both tongues 10.1, 10.2 of the support layer 4 are here in the plantar medial area or run laterally into an edge section of the edge 11 facing an inner side 8. The edge recesses 9.1, 9.2 both run into an edge section of the edge 11 facing an outer side 7 and are in the plantar arranged lateral area. This exemplary embodiment of the afferent-stimulating shoe insert 1 according to the invention is particularly advantageous in the correction or therapy of an abduction or a pronating foot, for example a valgus foot. The rear tongue 10.2 of the support layer 4 facing the rear 6 supports the heel in the plantar medial area, while the heel is unsupported in the plantar lateral area at the level of a rear edge recess 9.2 facing the rear 6. This counteracts heel pronation. In addition, ground reaction forces absorbed by the shoe can be transferred almost directly or undamped to the plantar-lateral heel area, so that the natural sensorimotor function of the foot can be stimulated in this area.

A front tongue 10.1 facing the front side 5 is arranged in the plantar medial metatarsal area of the big toe joint or the first and second metatarsal bones. A front edge recess 9.1 facing the front side 5 is arranged in the plantar-lateral metatarsal area of the third to fifth metatarsal bones. This can counteract pronation in the plantar metatarsal area or in the area of the plantar big toe joint.

The first protective layer 13 arranged between the intermediate layer 3 and the support layer 4 is arranged in relation to a foot supported on the shoe insert 1 in the plantar metatarsal area. It extends over the entire width of the insole 1 and covers the front tongue 10.1 and the front edge recess 9.1 of the support layer 4.

The 2 and 3 show the afferent-stimulating shoe insert 1 according to the invention 1 in lateral views, where 2 a medial view or outside view and 3 indicates a lateral view or inside view.

The support layer 4 is shaped in the plantar area of a foot arch and the heel to correspond to the sole of the foot and has curved side cheeks 12.1, 12.2 on the inside 8 and outside 7. The overlying elastic intermediate layer 3 and the cover layer 2 are correspondingly shaped at the same time. The shoe insole 1 thus nestles against a placed foot in the area of the arch of the foot and a pressure load or ground reaction forces can be evenly distributed from the shoe to the foot to be initiated. The arch of the foot is thus relieved. The lateral cheeks 12.1, 12.2, which are pulled up towards the foot, stabilize the foot laterally, particularly in the heel area, or can provide additional guidance of the foot in the desired gait pattern.

The 4 until 8th give for the afferent-stimulating shoe insert 1 according to the invention 1 five different cross-sectional views according to the sections AA to EE oriented transversely to the longitudinal direction L 1 at.

the inside 4 The section line AA shown cuts the insole 1 at the height of the front tongue 10.1. The layers 2 , 3 , 13 here have a slightly concave upward curvature towards the outside 7 and towards the inside 8 . In the middle, the intermediate layer 3, the first protective layer 13 and the cover layer 2 are slightly convex. The first protective layer 13, the intermediate layer 3 and the front tongue 10.1 of the support layer 4 are flattened at the edges in order to improve wearing comfort.

the inside 5 Viewed from the back 6, the section BB shown is in front of the front tongue 10.1 of the support layer 4. The central convex curvature of the layers 2, 3, 4, 13 is somewhat more pronounced here than at the level of the section AA. The intermediate layer 3, the first protective layer 13 and the supporting layer 4 are flattened at the edges.

The sections CC and DD at the level of the lateral cheeks 12.1, 12.2 and at the level of the plantar arch of the foot show the 6 and 7 . The layers 2, 3, 4 here have a continuous concave curvature which increases sharply towards the outside 7 and the inside 8 and which forms the lateral cheeks 12.1, 12.2. The layers 2, 3, 4 and the lateral cheeks 12.1, 12.2 are at the level of the in 7 Shown cutting curve DD pulled up almost to a high point.

8th indicates the course of the cut EE at the level of the rear tongue 10.2. The layers 2, 3, 4 here have a continuous concave curvature, with the lateral cheeks 12.1, 12.2 tapering towards the middle. The layers 2, 3, 4 and the lateral cheeks 12.1, 12.2 are lowered further here, following the shape of the human foot arch, compared to the course of the section DD. A heel cup is thus formed in the plantar heel area. The intermediate layer 3 and the rear tongue 10.2 of the support layer 4 are flattened at the edges.

The sectional views according to 4 until 8th show the shoe insert 1 according to the invention in an unloaded, torsion-free state. For therapy or correction in a desired gait pattern, the support layer 4 of the afferent-stimulating shoe insert 1 according to the invention is designed such that it can be twisted along the longitudinal axis L as a result of a twisting load. The twisting load occurs as a result of a malposition, in particular due to supination, pronation, abduction or adduction, of the foot placed on the shoe insert 1 . Due to the torsional stress, the support layer 4 undergoes torsional twisting or is twisted. A torsional prestress builds up in the support layer 4, as a result of which the support layer 4 counteracts the torsional load in a torsion-resilient manner. The torsional preload is preferably selected in a defined manner and increases the more the deformity of the foot deviates from the desired foot position. Depending on which therapy or correction result is pursued by wearing the afferent-stimulating shoe insert 1 according to the invention, a resistance to the torsional load in relation to the plantar heel area and in the plantar metatarsal area of the support layer 4 can be of different strength. When wearing the afferent-stimulating shoe insert 1 according to the invention, the foot is thus regularly and actively corrected by the support layer 4 in the event of malpositions or the wearer of the shoe insert 1 experiences a haptic signal as a result of the torsional torques in the support layer 4 counteracting the torsional load of the foot. If the afferent-stimulating shoe insert 1 according to the invention is worn for a longer period of time, the wearer is consequently conditioned to hold his foot in the foot position prescribed by the shoe insert 1 .

A second embodiment of the afferent-stimulating shoe insert 1 according to the invention, designed for a left foot, give the 9 and 10 at. Concealed parts of the edge 11 of the supporting layer 4 and of the layer edge of the first protective layer 13 are indicated here by means of a dashed line. Of course, the shoe insert 1 according to the invention can also be designed as a mirror image for a right foot. In this second exemplary embodiment, the top layer 2 and the intermediate layer 3 are designed analogously to the first exemplary embodiment of the afferent-stimulating shoe insert 1 according to the invention 1 .

The support layer 4 here differs from the exemplary embodiment 1 a different physical form. The edge recesses 9.1, 9.2 are arranged in the plantar medial heel and metatarsal area, the tongues 10.1, 10.2 in the plantar lateral heel and metatarsal area. This embodiment of the afferent-stimulating shoe insert 1 according to the invention is advantageous for a Therapy or correction of a supinating foot, for example a clubfoot, or an adduction. The rear edge recess 9.2 is provided here in the plantar medial area of the heel, the rear tongue 10.2 in the plantar lateral area of the heel. This counteracts heel supination.

In the plantar metatarsal area, the front tongue 10.1 is arranged at the level of the fourth and fifth metatarsal bones and extends essentially parallel to the longitudinal direction L. The front edge recess 9.1 extends essentially transversely to the longitudinal direction L in the area of the first to third metatarsal bones. A supination in the metatarsal area is thus also counteracted or can be corrected with it.

The invention is not limited to the illustrated exemplary embodiments of the subject matter of the invention. Alternative embodiments for the afferent-stimulating shoe insert 1 according to the invention are formed while retaining the invention, for example, in that the layers 2, 3, 4, 13, in particular the support layer 4, are incorporated with pads or pressure points that have a local toning or detoning effect, for example in the form of local Material thickening, thinning, hardening or relaxation. A toning or detoning effect can also be realized by a locally different fiber orientation in the support layer 4 .

The afferent-stimulating shoe insert 1 according to the invention is preferably adapted and custom-made to the individual needs of a wearer. In this respect, the shape of the shoe insole 1 according to the invention can vary, in particular with regard to the shape of the supporting layer 4 and there in particular with regard to the shape of the edge recesses 9.1, 9.2, the tongues 10.1, 10.2 and the laterally raised side cheeks 12.1, 12.2. The layers 2, 3, 4, 13 and in particular the support layer 4 of the afferent-stimulating shoe insert 1 can be custom-made based on an individual footprint or an individual foot measurement and produced, for example, by means of an additive manufacturing process or in a 3D printing process.

According to an alternative exemplary embodiment of the invention, an entire surface of the support layer 4 is completely sealed by a protective layer or by the first protective layer 13 and with a second protective layer arranged on a side of the support layer 4 opposite the intermediate layer 3 .

Identical components and component functions are identified by the same reference symbols.

reference list

1

shoe insert

2

top layer

3

intermediate layer

4

support layer

5

front

6

back

7

outside

8th

inside

9.1

front edge recess

9.2

rear edge recess

10.1

front tongue

10.2

back tongue

11

edge

12.1

outside cheek

12.2

inside cheek

13

first layer of protection

L

longitudinal direction

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• DE 102018009262 A1 [0003]

Claims (13)

Affection-stimulating shoe insert (1) in a multi-layer composite construction, comprising a cover layer (2), a support layer (4) and an intermediate layer (3) arranged between the support layer (4) and the cover layer (4), the layers (2, 3, 4) are cohesively connected to one another, the support layer (4) being arched to correspond to an arch of the foot and a heel and having an edge (11), the edge (11) both on an edge section facing a front side (5) and on an edge section thereto has an edge recess (9.1, 9.2) in a longitudinal direction (L) opposite and facing a rear side (6) and a tongue (10.1, 10.2) arranged laterally transverse to the longitudinal direction (L) next to the edge recess (9.1, 9.2), wherein the tongues (10.1, 10.2) and the edge cut-outs (9.1, 9.2) each merge into an edge section facing an outside (7) or inside (8), with a foot resting on the shoe insole (1) having a sole of the foot on the top layer (2) rests, the support layer (4) extends in the longitudinal direction (L) from a plantar heel area to a plantar metatarsal area and as a result of torsional loading of the foot along the longitudinal direction (L) can be twisted in such a way that the torsional loading in the supporting layer (4) a torsional preload is built up and the support layer (4) counteracts the torsional load in a torsionally resilient manner, with the intermediate layer (3) and the cover layer (2) extending in the longitudinal direction (L) from the plantar heel area to a plantar toe area and the two Edge recesses (9.1, 9.2) of the support layer (4) are each arranged in a plantar medial or in a plantar lateral area. Afference-stimulating shoe insert (1) according to claim 1 , characterized in that the layers (2, 3, 4) in the plantar heel area and in the area of the arch of the foot are arched in such a way that raised lateral cheeks (12.1, 12.2) are formed towards the outside (7) and inside (8). Afference-stimulating shoe insert (1) according to claim 1 or 2 , characterized in that in at least one of the layers (2, 3, 4) at least one plantar toning and/or detonizing pad and/or at least one plantar toning and/or detonizing pressure point is provided. Afference-stimulating shoe insert (1) according to claim 3 , characterized in that the supporting layer (4) is made of thermoplastic material and/or of fiber composite material and/or preferably of carbon. Afference-stimulating shoe insert (1) according to one of Claims 1 until 4 , characterized in that the supporting layer (4) has a different fiber orientation and/or layer thickness and/or layer thickness in sections. Afference-stimulating shoe insert (1) according to one of Claims 1 until 5 , characterized in that the supporting layer (4) is manufactured additively in one piece. Afference-stimulating shoe insert (1) according to one of Claims 1 until 6 , characterized in that both edge recesses (9.1, 9.2) of the support layer (4) are arranged in the plantar-lateral area and both tongues (10.1, 10.2) of the support layer (4) are arranged in the plantar-medial area. Afference-stimulating shoe insert (1) according to one of Claims 1 until 6 , characterized in that both edge recesses (9.1, 9.2) of the support layer (4) are arranged in the plantar medial area and both tongues (10.1, 10.2) of the support layer (4) are arranged in the plantar lateral area. Afference-stimulating shoe insert (1) according to claim 8 , characterized in that the front edge recess (9.1) is arranged at the level of the first to third metatarsal bones and the front tongue (10.1) at the level of the fourth and fifth metatarsal bones. Afference-stimulating shoe insert (1) according to one of Claims 1 until 9 , characterized in that the supporting layer (4) is flattened toward its edge (11). Afference-stimulating shoe insert (1) according to one of Claims 1 until 10 , characterized in that between the intermediate layer (3) and the supporting layer (4) a first protective layer (13) is provided which in particular covers the front tongue (10.1) and the front edge recess (9.1) of the supporting layer (4). Afference-stimulating shoe insert (1) according to one of Claims 1 until 11 , characterized in that a second protective layer is provided on a side of the supporting layer (4) opposite the intermediate layer (3). Afference-stimulating shoe insert (1) according to one of Claims 1 until 12 , characterized in that the layers (2, 3, 4, 13) and in particular the support layer (4) is produced using an additive manufacturing process.

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