EP3609360B1 - Footbed for heel shoes - Google Patents

Description

The present invention relates to a footbed for a heel shoe, comprising a sole-shaped base body, such as a flat insert, with a forefoot area, a metatarsal area and a rearfoot area, and with at least one elevation arranged on a flat upper side for supporting a foot.

Background of the invention

Shoes with a heel area that is significantly higher than a forefoot, so-called heel shoes, have been very popular for many years, especially among women. Heel shoes are defined by the fact that the rear foot area is at least 2 cm higher than the forefoot area. While in flat shoes the weight of a person or the pressure on the human foot is mostly evenly distributed over the forefoot, metatarsal and heel area, in high heel shoes the main load is primarily concentrated on the forefoot area due to the increased heel position. Especially with extremely high and thin heel shoes, the front part of the foot, i.e. the ball of the foot, is stressed.

This uneven pressure distribution on the foot often leads to heel shoes when worn, especially compared to flat shoes felt uncomfortable and uncomfortable. Due to the extreme inclination of the foot, long-term wear can cause uncomfortable pain not only on the foot, but also in the knee, back and neck area of a person and often lead to long-term medical damage. It is known that with targeted foot bedding to a certain extent a local support of the foot and thus an improved pressure distribution under the foot can be achieved.

From the US 2004/0211086 A1 For example, an insole for a heel shoe is known in which, by means of a crescent-shaped elevation arranged in the rear foot area for supporting a heel and a circular elevation arranged in the metatarsal area for supporting a metatarsal, the pressure is distributed on a tread surface of a foot at least partially from the forefoot area in the direction of the middle - and rear foot area can be shifted. From the WO 2010/48689 A1 a heel shoe with a foot sole is known which has an essentially triangular elevation in a midfoot area and a full-area elevation in a rear foot area to support the foot. From the US 2009/0193683 A1 a footbed sole with a circumferential raised edge arranged on an upper side to improve the seating comfort of a shoe is known. From the EP 2 442 683 A1 Furthermore, a shoe insert for cyclists is known in which elevations are provided in a forefoot area and in a rearfoot area. In addition, from the US 2009/183388 A1 a method for producing an orthosis with elevations arranged on the upper side of the footbed is known.

Despite the intensive efforts to improve the wearing comfort of a high heel shoe, the raised areas of a footbed, which are usually individually and independently of one another, only have a purely mechanical supportive effect, so that locally stronger and weaker pressure-loaded areas and thus uncomfortable pressure points can still occur on the foot . In particular, those "stepped" or "terrace-forming" elevations formed in the middle of the inclined metatarsal area of the heel shoe for supporting individual metatarsal areas can lead to locally occurring pressure pain due to the high sensitivity in this area. About that In addition, such elevations can prevent or at least limit the even rolling of the foot when walking.

Object of the invention

The object of the present invention is therefore to provide a footbed for a shoe that improves at least one of the above-mentioned disadvantages and in particular enables a uniform pressure distribution on the tread surface with a simultaneously improved rolling behavior.

According to the invention, this object is achieved by a footbed with the features of main claim 1 and by a shoe with the features of main claim 14. Advantageous configurations and developments of the invention are disclosed in the subclaims, the description and the figures. Furthermore, exemplary methods for producing and installing the footbed are proposed which allow an elegant and high-quality design of the shoe to be combined with maximum comfort and long-term orthopedic compatibility.

Description of the invention

The footbed according to the invention has a base body which, in the metatarsal area, has a first elevation in the area of an inner foot side (medial) and a second elevation in the area of an outer foot side (lateral). The elevations each preferably have a convex upper side and each form a pressure-increased zone, whereby both a mechanical support of individual foot areas and a stimulation of individual nerve cells and muscles of the foot used for positioning and rolling movement can be brought about. The thickness of the elevations depends in each case on the relative base thickness of the sole thickness, but the elevations can also be positioned on an insole of a shoe without a connecting, continuous sole base. In particular, the pressure acting on the foot can be distributed in an advantageous manner in a targeted manner not only in its longitudinal extent but also transversely to the longitudinal extent over almost the entire foot contact area, in particular in the forefoot and rear foot area. The elevations are in the longitudinal extension of the Base body arranged offset to one another. In particular, the first elevation can be arranged in an area of the base body in such a way that its highest point when a foot rests below the projection of the medial heel bone (sustentaculum tali), and the second elevation in an area of the base body in which when one foot rests Foot the distal end of the fifth metatarsal (metatarsalia) is arranged. The second elevation thereby preferably acts as a lateral counter-bearing to the first elevation. Through this special, opposite arrangement of the elevations, a pair of active surfaces can be formed, which has a pressure load distributed over the entire width and length of the foot, in particular in the forefoot and rearfoot area, as well as an improved rolling movement of the foot, particularly similar to that of a flat shoe Walking enables. Furthermore, a rolling curve can be achieved that is clearly S-shaped, in particular from the first elevation arranged on the inner foot side outwards laterally to the second elevation arranged on the outer foot side and then back to the area on the inner foot side in which the metatarsophalangeal joint of the big toe rests. In this way, in particular, stepping on only the medial forefoot, also called "stumbling", can be avoided and an improved gait can be achieved. The arrangement and combination of the elevations according to the invention thus surprisingly brings about both improved pressure distribution and improved foot motor skills.

The first elevation extends from the metatarsal area to the rear foot area. The first elevation in the longitudinal extension of the base body is particularly preferably designed in equal parts, in particular in half and / or symmetrically, in the metatarsal area and the rear foot area. As a result, the longitudinal extension of the first elevation can differ significantly from the longitudinal arch supports known to the person skilled in the art, which are usually located significantly further forward with their area of gravity and / or their longitudinal extension. This particular inventive characteristic allows the pressure load in the heel area to be transferred from the center of the heel area to an edge area, so that the pressure distribution in the heel area, in particular across the longitudinal extension of the base body, can be distributed over almost the entire contact surface. Furthermore, the heel can reach behind the elevation in the longitudinal extension of the base body should be avoided so that the elevation is perceived as relatively comfortable.

The first elevation is preferably formed exclusively in a half of the base body directed in the longitudinal extension of the base body to the rear foot region and the second elevation exclusively in a half of the base body directed in the longitudinal extension to the forefoot region. In this way, a particularly uniform pressure distribution in the forefoot and rearfoot area can be achieved in an advantageous manner.

The first elevation is preferably crescent-shaped and extends along an inner foot side edge in the longitudinal extension of the base body, a highest point of the elevation preferably being arranged in the area of the inner foot side edge, in particular below the sustentaculum tali of a foot on the footbed. The first elevation is particularly preferably designed to increase continuously in the direction of the inner foot side edge, the corner points of the sickle shape preferably lying on the inner foot side edge, so that the particularly circular, semicircular or elliptical elevation extends in the direction of a longitudinal axis of the base body. As a result, the pressure distribution in the rear foot area can be increased and the feeling of pressure on the elevation can be improved. It should also be emphasized that the deliberate punctual support on the medial inside of the footbed not only leads to a pressure shift back, but also to a horizontal tilting of the heel bone and, due to this supination posture, in particular to a tension of the longitudinal muscles in the arch of the foot, which in turn leads to a targeted increased stress on the plantar foot muscles and the outer edge of the forefoot.

The first elevation preferably has a longitudinal tilting formed in the longitudinal extension of the base body and a transverse tilting formed transversely to the longitudinal extension of the base body. In particular, the top contour of the base body can be tilted at least in sections by a first angle and by a second angle from the horizontal according to an exemplary, biaxial tilting, the first angle leg being rotated at a positive angle between 20 and 35 degrees about an axis of rotation, which can be arranged essentially parallel to the longitudinal axis of the base body, and the second angle leg is rotated at a positive angle between 2 and 22 degrees about a second axis of rotation which is arranged essentially parallel to a transverse axis of the base body. In this way, the pressure distribution can be enlarged and the feeling of pressure on the elevation can be improved. In particular, a pressure load or a pressure which would act on the forefoot without the elevation can be absorbed in the side area of the rear foot area.

The first elevation is preferably designed in such a way that the area of the first elevation projected onto a horizontal plane forms 5% to 25% of the area of the entire base body projected onto the horizontal plane. As a result, a particularly effective pressure distribution can be achieved and the feeling of pressure on the elevation can be improved.

The second elevation is essentially rectangular, round, semicircular, trapezoidal or elliptical and designed to increase in the direction of an outer foot side edge. The second elevation particularly preferably has an upper side contour that rises continuously or is concave towards the outer foot side edge. As a result, in particular the fourth and fifth metatarsal bones of a foot arranged in this area can be slightly raised, so that a pressure which, without the elevation, would only act on a partial area of the forefoot area, in particular the inner foot area, from the outer edge area of the foot at least partially can be recorded, and thereby the overall pressure distribution can be improved. Surprisingly, it has been shown that such pressure absorption in the front outer foot area compensates for the increased pressure absorbed by the first elevation in the rear inner foot area and thus essentially centers the center of gravity of the body weight compared to a shoe without such a second elevation. The interaction of the first and second elevation not only results in a more even distribution of pressure in the direction of the longitudinal and transverse axes, but also a more stable and fluid rolling behavior of the foot, which significantly relieves the ankle and knee joints, which are normally heavily overloaded in heel shoes brings.

A material thickness of the base body is preferably greater in the area of the first elevation than in the area of the second elevation. In particular, the first elevation can be made higher than the second elevation orthogonally to a flat underside of the base body. This is particularly advantageous since the compressive forces occurring in the area of the first elevation, in particular the rear foot area, are usually greater than the compressive forces occurring in the area of the second elevation, in particular the lateral side area of the foot.

At least one additional third elevation is arranged in the metatarsal area. The third elevation can in particular serve to support a foot retrocapitally. The third elevation is preferably arranged centrally in the front metatarsal area in the transverse extent of the base body. In particular, the third elevation, based on the longitudinal axis of the base body, can each be formed in half in a lateral foot side area and a medial foot side area. The third elevation is especially tear-shaped or triangular in its longitudinal extension. The third elevation is particularly preferably arranged in the region of the base body in which the second and third metatarsal bones are disposed when a foot is located on the base body. As a result, both a mechanical support of individual foot areas and a stimulation of individual nerve cells serving to position the foot and thus to distribute pressure in the shoe can be brought about. In particular, activation of the longitudinal arch muscles of the foot can be triggered by means of the third elevation, which is necessary for healthy unrolling of the foot.

The base body preferably has a homogeneous material thickness in the area of the third elevation. In particular, the base body has a constant material thickness in the area of the third elevation. This is preferably done through a concave recess arranged on the underside of the base body. As a result, a transverse axis, preferably running through the center of the third elevation, can act as an axis of articulation or rotation for the footbed, so that the footbed and optionally also the shoe can buckle longitudinally about the axis of articulation, especially when the foot rolls while walking. This causes a sensation on the foot that is similar to that of a flat shoe.

Preferably, at least one forefoot elevation is additionally arranged in the forefoot area. As a result, a compressive force acting in particular in the direction of the forefoot can be absorbed by the foot in the proximal toe area.

A first forefoot elevation is preferably designed as a toe gripper and comprises a crescent-shaped arch extending essentially over the entire width of the base body. The toe gripper has a bead-like shape and is preferably formed in that area of the base body in which the first, second, third, fourth and fifth proximal toe bones (phalanx proximalis) are arranged when the foot is on the base body. In particular, the toe gripper extends between the lateral and medial foot side area of the base body, in particular from that area in which the first and / or second toe bone is arranged when the foot is on the base body, obliquely in a proximal direction to the outer foot side edge of the base body. The toe gripper can be designed in such a way that it protrudes into a toe arch. As a result, a pressure force acting in the direction of the forefoot can already be absorbed by the foot in the proximal toe area, so that the pressure load can be shifted further back in the longitudinal extension of the base body.

The base body preferably has an additional bulge on a flat underside, in particular in the forefoot area, which is preferably used in heel shoes with a plateau. The bulge is nothing more than an elevation protruding on the underside of the base body, in particular a second forefoot elevation arranged on the underside, which is preferably absorbed by a corresponding recess in the material of the plateau. As a result, in the area of the bulge to form a pressure-reduced zone with a flat upper side, the base body has an increased thickness of the sole material, which is softer compared to the plateau of the heel shoe. The bulge serves as a big toe joint damper, which further favors the absorption of pressure in the lateral forefoot area compared to the medial forefoot area and thus contributes indirectly to the improved foot motor skills. The bulge is preferably arranged such that at The foot located on the main body of the metatarsophalangeal joint damper is arranged in the distal region of the first and second metatarsal bones when viewed from the vertical projection.

The base body and the elevations are preferably constructed as a unit from a homogeneous substance or mixture of substances. The base body can be made, for example, from a viscoelastic material or from a polypropylene or plastic, in particular polyurethane or ethylene-vinyl acetate. The homogeneous substance or substance mixture can be present in a locally different density in the base body, so that one or more zones in the footbed can be formed with different substance properties. The density distribution can in particular be such that the footbed has a greater hardness in the heel area than in the forefoot area and / or that the footbed has a lower elasticity in the heel area than in the forefoot area. In particular, the hardness or material density of the footbed can be made softer or more elastic in the forefoot area and harder or less elastic in the rearfoot area and in particular a preferred Shore hardness of 20 plus / minus 10 Shore A in the forefoot area and 50 plus / have minus 10 Shore A in the rear foot area. The footbed can thus be produced in a relatively simple manner and inexpensively. This is particularly advantageous if the footbed is intended for mass production or as a ready-made product.

The elevations are preferably each formed by a separate element arranged on the base body, in particular as a locally arranged gel insert. In particular, the first elevation, the second elevation, the third elevation, the toe gripper and / or the big toe joint damper can be designed as one or more separate elements that are placed on a midsole of the shoe without direct connection and / or as separate elements with the Basic body are connected. As a result, the elevations can be arranged on the base body individually for each foot according to individually recorded specifications of a foot geometry. In this way, a particularly effective mechanical support of individual areas of the foot as well as a particularly effective stimulation of individual nerve cells serving to position the foot and thus to distribute pressure in the shoe can be brought about.

In a particularly preferred embodiment, it is provided that at least the base body and / or some of the planar elevations are manufactured by means of a 3D printing process known per se, in particular using plastic as the manufacturing material. With such a method, an optical and / or printing measurement of the foot can in particular first take place. The footbed is then individually produced in accordance with the previously recorded data of the foot, in particular the size and the position of the elevations can be adjusted absolutely and / or relative to one another individually according to the previously determined specifications. In this way, for example, the highest point of the first elevation can be arranged directly below the sustentaculum tali of a respective foot. As a result, the footbed can be produced particularly individually, automatically and therefore particularly inexpensively.

The heel shoe according to the invention has a footbed with at least one of the features mentioned above.

In the presence of an elevation or bulge formed on the flat underside of the footbed on an insole, the shoe preferably has a recess corresponding to the bulge of the footbed for receiving the bulge. As a result, the footbed base body can advantageously have a pressure-reduced zone in the area of the bulge.

Figuren 1

eine Draufsicht auf ein erfindungsgemäßes Fußbett;

Figur 2a

eine Seitenansicht des erfindungsgemäßen Fußbettes;

Figuren 2b

eine Rückansicht des erfindungsgemäßen Fußbettes; und

Figuren 3a und 3b

jeweils eine Vergleichsdarstellung zur Druckbelastung bei einem herkömmlichen Fußbett und dem erfindungsgemäßen Fußbett.

Exemplary embodiments of the invention are explained in more detail below with reference to the figures. They show schematically:

Figures 1

a plan view of an inventive footbed;

Figure 2a

a side view of the footbed according to the invention;

Figures 2b

a rear view of the footbed according to the invention; and

Figures 3a and 3b

each a comparison of the pressure load in a conventional footbed and the footbed according to the invention.

In the Figure 1 a schematic plan view of the footbed 1 according to the invention is shown. The footbed 1 has a sole-shaped base body 2 which is essentially adapted to the dimensions of a human foot 100. The foot 100 located on the base body 2 is shown in the present case in an X-ray illustration with visible bones.

The main body 2 has a forefoot area 21, a metatarsal area 22 and a rearfoot area 23. The forefoot area 21 extends in the longitudinal direction of the base body 2 from a distal end of the toes to approximately a distal area of the metatarsal bones. The metatarsal region 22 extends in the longitudinal direction of the base body 2 approximately from the distal metatarsal bone to a distal end of the heel joint. The rear foot region 23 extends in the longitudinal direction of the base body 2 approximately from the distal end of the heel joint to the proximal end of the heel. The base body 2 has a distal or front half 28 separated by a central transverse axis M arranged transversely to the longitudinal extent of the base body 2 and a proximal or rear half 29, the central transverse axis M being arranged approximately in the area of the proximal metatarsal bones. Furthermore, the base body 2 has a lateral outer foot side 26 separated by a longitudinal axis L and a medial inner foot side 27.

The base body 2 has several elevations 3, 4, 5, 6, 7 on a flat upper side 24, which in the arrangement and combination according to the invention bring about an improved pressure distribution as well as improved foot motor skills.

A first elevation 3 is arranged on the inner foot side 27 in the metatarsal region 22 on the base body 2. The first elevation 3 is designed as a zone of increased pressure and can provide both mechanical support for the foot 100 and stimulation of muscles and nerve cells. The first elevation 3 is arranged in particular in that area of the base body 2, in which, when the foot 100 rests on the base body 2, the projection of the medial calcaneus (sustentaculum tali) is arranged. The first elevation 3 is sickle-shaped and extends along the longitudinal axis L, in particular along the inner foot side 27, in essentially equal parts from the metatarsal area 22 to the rear foot area 23. The first elevation 3 is increasingly designed in the direction of an inner foot side edge 27a , the highest point of the elevation 3 being directly below the sustentaculum tali of the medial calcaneus. The corner points of the sickle-shaped first elevation 3 lie on the inner foot side edge 27a. As a result, the pressure distribution in the heel area can be increased and the pressure sensation at the elevation 3 can be improved.

The first elevation 3 has a longitudinal tilting formed in the longitudinal extension of the base body 2 and a transverse tilting formed transversely to the longitudinal extension of the body.

The longitudinal tilting of the first elevation 3, as in particular in FIG Figure 2a recognizable, is formed such that an angle (α) between a straight line A1 connecting the lowest point 93 on the upper side 24 in the rear foot area 23 and the lowest point 91 in the forefoot area 21 and a straight line A1 projected into the longitudinal axis L of the footbed 1, between the lowest point 93 in the rear foot region 23 and a highest point 31 of the elevation 3 formed on an inner foot side edge 27a of the footbed 1, an angle (α) of approximately 30 ° is formed. The angle can basically assume values between 20 and 35 ° or 30 ° plus / minus 10 °. As a result, a longitudinal tilting of the foot 100 by approx. 5 ° is achieved at the support point on the foot 100. In particular, a foot area located on the base body 2 is arranged exclusively in the area of the first elevation 3, i.e. in the inner foot side area 27, in such a way that an additional pressure force that would act on the forefoot 21 without the elevation 3 is in the side area 27 of the rear foot area 23 can be included. The lowest point 91 in the forefoot area 21 is located in particular in that area of the longitudinal axis L of the base body 2 in which the base body 2 begins to rise from the plane of the forefoot area 21 in the direction of the rear foot area 23.

The transverse tilting of the first elevation 3, as in particular in FIG Figure 2b recognizable, is designed such that an angle (β) between a plane E horizontally intersecting the longitudinal axis L and a straight line A3 which is orthogonal to the longitudinal axis L and a highest point 31 of the elevation 3 formed on an inner foot side edge 27a of the footbed 1 and intersecting an angle ( β) is formed from about 20 °. In particular, the angle can assume a value between 12 ° plus / minus 10 °. As a result, a transverse tilting of approximately 3 ° is achieved at the foot 100. In particular, a foot area located on the base body 2 is positioned in the area of the first elevation 3 in such a way that an additional pressure force, in particular a pressure that would act on a central heel area without the elevation 3, can be absorbed in the side area 27 of the rear foot area 23.

A second elevation 4 is arranged on the outer foot side 26 in the metatarsal region 22 of the base body 2. The second elevation 4 is essentially rectangular, trapezoidal or elliptical, the longer edge of the rectangle being arranged essentially parallel to the longitudinal axis L of the base body 2. The second elevation 4 has an upper side contour that rises towards the outer foot side edge 26a and is in the present case concave, the actual or absolute elevation being relatively small. The second elevation 4, viewed orthogonally to a flat underside 25 of the base body 2, is less high than the first elevation 3 Serve support of the foot 100 and in particular to stimulate muscles and nerve cells. The second elevation 4 is arranged in particular in that region of the base body 2 in which the distal end of the fourth and / or fifth metatarsals is arranged when the foot 100 rests on the base body 2. As a result, a fifth metatarsal bone of a foot 100 arranged in this area can be slightly raised, so that a pressure that would only act on a forefoot and inner foot area without the elevation 4 can be at least partially absorbed by the outer edge area of the foot 100, and thereby the overall pressure distribution can be balanced and adapted to the S-shaped rolling curve that is common in flat shoes. In the longitudinal extent of the base body 2 extends the second elevation 4 maximally from the proximal end of the fifth metatarsal to the proximal area of the fifth proximal toe bone (phalanges proximales).

The formation of the second elevation 4 and the interaction of the oppositely arranged elevations 3 and 4 can in particular improve a rolling curve of the foot 100, which is not shown here, when walking. In particular, a clearly S-shaped rolling curve can be achieved, which extends from the first elevation 3 arranged on the inner foot side 27 laterally outward to the second elevation 4 arranged on the outer foot side 26 and then back to the area arranged on the inner foot side 27 in which the metatarsophalangeal joint of the big toe extends. In this way, in particular, an unpleasant appearance on only the medial forefoot is avoided. The restored rolling movement of the foot, which can usually only take place to a limited extent in high heel shoes, even with great strain on muscles and joints, enables an improved gait.

A third elevation 5 is arranged in the middle area of the base body 2 in the metatarsal area, in particular in the distal metatarsal area 22. The third elevation 5 is tear-shaped and serves to support the foot 100 retrocapitally Foot 100 are triggered, which is required for healthy rolling of the foot 100. Despite the third elevation 5, the base body 2 has a homogeneous material thickness D in this area, in particular through a recess 8 formed on the underside 25 and corresponding to the third elevation 5. For this purpose, the third elevation 5 is convex and the recess 8 is concave . As a result, a transverse axis (not shown), preferably located centrally through the third elevation 5, can act as an axis of articulation or rotation for the footbed 1, with the footbed 1 and optionally also an entire shoe in particular during a rolling movement of the foot 100, for example when walking can bend in this area in the longitudinal direction about the bend axis. As a result, a sensation similar to that of a flat shoe can be generated on the foot 100, but nevertheless a proprioceptive effect that activates the muscles is triggered to support the rolling function of the foot will. This such underside excavation and the unusually small and inconspicuous expression of the third elevation in terms of area represent a significant improvement in the support compared to conventional metatarsal pads, as are known to the person skilled in the art, in particular for use in flat shoes.

A fourth elevation 6, also called the forefoot elevation or toe gripper, is arranged in the forefoot area 21 of the base body 2. The toe gripper 6 has a crescent-shaped curvature which extends essentially over the entire width of the base body 2. The toe gripper 6 is arranged in particular in that region of the base body 2 in which the proximal toe bones 1 to 5 of the foot 100 are arranged. The toe gripper 6 can protrude into a toe arch and there counteract a pressure force directed in the direction of the forefoot area 21, which in a high heel without a comparable toe gripper could lead to the foot 100 sliding too much forward and the first elevation 3 no longer being optimal lies below the Sustentaculum Tali. Furthermore, the toe gripper 6 helps to compensate for the increased stress on the plantar foot muscles (flexor digitorum brevis), which is triggered by the first elevation 3 and the second elevation 4, in that the toe gripper 6 relaxes the flexor tendons and flexes the lumbrical muscles so that the forefoot is reached. The toe gripper 6 is therefore required so that the foot 100 does not cramp during the rolling movement promoted by the remaining elevations.

A fifth elevation 7 is arranged on the flat underside 25. The fifth elevation 7, also called a bulge, serves as a big toe joint damper and is nothing more than an elevation protruding from the underside 25 of the base body 2. As a result, the base body 2 has an increased material thickness D in the area of the bulge 7 with a flat upper side 24 in order to form a pressure-reduced zone. Due to the big toe joint damper 7 and the generally soft and continuous footbed 1, in particular the pressure load concentrated on a partial area of the forefoot area 21 can be partially shifted to the entire width of the forefoot area 21 and the rearfoot area 23. Likewise, the big toe joint damper 7 and the toe gripper 6 hang directly with the balance of the light Raising the inside of the foot 27 (supination), together because this causes on the one hand an increased rolling of the foot 100 over the metatarsophalangeal joint and on the other hand a "forward turning" of the foot 100, which has a positive effect on the gait and through the two elements 7 and 6 is balanced.

In the Figures 3a and 3b shows a comparison of the pressure load on the foot 100 when a woman walks with the same heel shoes on the one hand with a conventional footbed S and on the other hand with the footbed 1 according to the invention for comparison. The comparative representations thus show the result of a practical investigation. The pressure load is represented by dark circles, in particular in the forefoot area 21 with the reference numeral 101 and in the rear foot area 23 with the reference numeral 102.

That in the Figure 3a on the left half of the illustration shown footbed S and in the Figure 3b The footbed S shown on the right half of the illustration illustrate the pressure load on the footbed S or on an underside of a foot 100 when using the conventional footbed S. Here, the weight or pressure force acting on the footbed S is in each case on a small part of the forefoot area 21 is concentrated. In particular, the pressure load in the forefoot area 21 is highest in the area of the first four toes. In contrast, the pressure load in the area of the fifth toe, that is to say on the outer foot side 26 of the forefoot area 21, as well as in the rear foot area 23 of the conventional footbed S is relatively low. As a result, the pressure on foot 100 is concentrated predominantly on the forefoot area, in particular on the medial forefoot and here in particular on the distal area of the first and second metatarsal bones. This means that, due to the design of the footbed S, stepping occurs exclusively with the forefoot and a rolling movement of the foot when walking is almost completely inhibited, so that what is known as "stumbling" occurs when walking. As a result, wearing a high heel shoe with such a footbed S is relatively uncomfortable in the long run and can cause pain not only on the foot 100 but also due to the misalignment of the foot 100 in the back up to the neck of the person wearing the shoe.

That in the Figure 3a on the right half of the illustration and in the Figure 3b The footbed 1 according to the invention shown on the left half of the illustration shows the pressure load when the same heel shoe is used with the footbed 1 according to the invention an outer foot side edge 26a, as well as distributed over almost the entire surface of the rear foot region 23. As a result, the pressure on the foot 100 is distributed over the entire length and width B of the footbed 1, with the exception of the metatarsal area 22, which is virtually unloaded. This means that the design of the footbed 1 according to the invention and in particular the interaction of the elevations 3, 4, 5, 6, 7 achieve a pressure redistribution away from the medial forefoot to the rear foot and a healthy rolling movement of the entire foot 100. In particular, the elevations 3, 4, 5, 6, 7, and the resulting slight lifting of the inside of the foot (supination), stimulate or irritate certain nerve tracts or muscles (proprioception) to improve the rolling movement of the entire foot. As a result, wearing a heel shoe with such a footbed 1 according to the invention is pleasant and comfortable even over a longer period of time.

In the embodiment of the footbed 1 shown in the figures, the base body 2 and the elevations 3, 4, 5, 6, 7 are constructed as a unit from a homogeneous substance or mixture of substances. This makes the production of the footbed particularly inexpensive. It is provided that the base body 2 and the elevations 3, 4, 5, 6, 7 are produced by means of a so-called 3D printing process known per se. The surface contours of the base body 2 can be individually adapted to a human foot 100. In particular, this method can initially be used to measure the foot optically and / or by means of printing. The footbed can then be individually manufactured according to the recorded data of the foot. A viscose-elastic material or - preferably in the case of printing production - a polypropylene is preferably used as the production material for the base body 2.

Reference list:

1

Footbed

2

Base body

20th

total projected area

21

Forefoot area

22nd

Metatarsal area

23

Rear foot area

24

Top

25th

bottom

26th

Outer foot side

26a

Outer foot side edge

27

Inner foot side

27a

Inside foot side edge

28

front half area

29

rear half area

3rd

first increase

31

the highest point

32

projected area

4th

second increase

5

third increase

6th

first forefoot elevation

7th

second forefoot elevation, bulge

8th

Recess, depression

91

lowest point forefoot area

93

lowest point of the rear foot area

100

foot

101

Pressure load

102

Pressure load

α

Longitudinal tilt angle

β

Lateral tilt angle

A1

Just

A2

Just

A3

Just

B.

broad

D.

Material thickness

L.

Longitudinal axis

M.

middle transverse axis

E.

level

S.

conventional footbed

Claims (15)

1. Footbed (1) for a heeled shoe in which the hindfoot region is arranged at least 2 cm higher than the forefoot region,

   comprising a sole-shaped main body (2) having a forefoot region (21), a midfoot region (22) and a hindfoot region (23), and comprising at least one elevation (3, 4, 5, 6, 7) arranged on a planar upper face (24) to support a foot (100),

   wherein the main body (2), in the midfoot region (22), has a first elevation (3) in the region of an inner foot side (27), which elevation extends from the midfoot region (22) to the hindfoot region (23), and a second elevation (4) in the region of an outer foot side (26), and the elevations (3, 4) are arranged so as to be offset relative to one another in the longitudinal extension of the main body (2),

   and the second elevation (4) is substantially rectangular, round, semicircular, trapezoidal or elliptical and is designed to increase in the direction of an outer foot side edge, and the fourth and fifth metatarsal bones of a foot that can be arranged in this region can be raised as a result, such that a pressure which, without the elevation, would only act on a portion of the forefoot region, in particular the inner foot region, can be at least partially absorbed by the outer edge region of the foot,

   wherein at least one additional third elevation (5) is arranged in the midfoot region (22).
2. Footbed (1) according to claim 1, characterized in that the first elevation (3) is formed exclusively in a half (29) of the main body (2) that is directed to the hindfoot region (23) in the longitudinal extension of the main body (2) and the second elevation (4) is formed exclusively in a half (28) of the main body (2) that is directed to the forefoot region (21) in the longitudinal extension of the main body (2).
3. Footbed (1) according to either of the preceding claims, characterized in that the first elevation (3) is crescent-shaped and extends along an inner foot side edge (27a) in the longitudinal extension of the main body (2).
4. Footbed (1) according to any of the preceding claims, characterized in that the first elevation (3) has a longitudinal tilt (α) formed in the longitudinal extension of the main body (2) and a transverse tilt (β) formed transversely to the longitudinal extension of the main body (2).
5. Footbed (1) according to any of the preceding claims, characterized in that the first elevation (3) is designed such that the area (32) of the first elevation (3) projected onto a horizontal plane (E) forms 5% to 20% of the total area (20) of the main body (2) projected on the horizontal plane (E).
6. Footbed (1) according to any of the preceding claims, characterized in that the second elevation (4) is substantially rectangular and is designed to increase in the direction of an outer foot side edge (26a).
7. Footbed (1) according to any of the preceding claims, characterized in that a material thickness (D) of the main body (2) in the region of the first elevation (3) is greater than in the region of the second elevation (4).
8. Footbed (1) according to any of the preceding claims, characterized in that the main body (2) has a constant material thickness (D) in the region of the third elevation (5).
9. Footbed (1) according to any of the preceding claims, characterized in that at least one forefoot elevation (6) is arranged in the forefoot region (21), which elevation is preferably designed as a toe grip and comprises a crescent-shaped bulge which extends substantially over an entire width (B) of the main body (2).
10. Footbed (1) according to any of the preceding claims, characterized in that the main body (2) additionally has an elevation (7) on a planar lower face (25), in particular in the forefoot region (21).
11. Footbed (1) according to any of the preceding claims, characterized in that the main body (2) and the elevations (3, 4, 5, 6, 7) are constructed as a unit from a homogeneous substance or mixture of substances.
12. Footbed (1) according to any of claims 1 to 10, characterized in that the elevations (3, 4, 5, 6, 7) are each formed by a separate element arranged on the main body (2), in particular as a locally arranged gel insert.
13. Footbed (1) according to any of the preceding claims, characterized in that the main body (2) and/or at least one of the elevations (3, 4, 5, 6, 7) is produced by means of a 3D printing process.
14. Heeled shoe comprising a footbed (1) according to at least one of the preceding claims.
15. Shoe according to claim 14, an elevation (7) being provided on a planar lower face (25) of the main body (2), characterized in that a recess corresponding to the elevation (7) (7) is formed in an insole of the shoe for receiving the elevation.

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